Linear drive with reduced axial force component, linear compressor and refrigerator

FIELD: electrical engineering.

SUBSTANCE: linear drive 1 comprises stator 2 accommodating slide 7 reciprocating there inside along axis 3. Note here that stator 2 incorporates magnetising core 4 with poles 5, 6. Note also that slide 7 comprises assemblage of alternating opposite-polarisation magnets 22, 23 arranged one after another along axis 3. Said stator 2 comprises at least two drive coils 16, 20 arranged opposed relative to slide 7. Besides said magnets 22, 23 of said slide 7 feature length L2 along axis 3 that corresponds, in fact, to sum of poles widths B1 and distance A1 between poles 5, 6. Skewed surface 9 of supports 8, 10 or appropriate selection of length of magnets 22, 23, slide 7, pole width B1 and distance A1 between poles 5, 6 improve control or adjustment of reciprocation of rotor 7.

EFFECT: higher accuracy and efficiency of control, power savings.

18 cl, 5 dwg

 

The technical field

The invention relates to a linear actuator stator and moving it back and forth along the axis of the slide-anchor (next slide), and the stator contains namagnichivaemost core with poles, and the poles are stretched pillar essentially to the slider. The invention relates to a linear compressor, the refrigerating apparatus, particularly to a refrigerator and/or freezer or air conditioner, as well as to a method of cooling products and/or compression of the working environment.

The level of technology

Linear actuators with permanently excited sliders are driven directed through the appropriate management of drive coils on the stator due to the fact that through the drive coil is fed a corresponding current. Field coils pass through namagnichivaemost core with poles and focus on the area around the slider.

DE 699 015 86 T2 discloses an electromagnetic linear drive mechanism containing a stator structure with two poles which are excited by at least one electric winding. A mobile node contains a magnetic bearing and nominativus part, and a mobile node contains one or two magnets, which are permanently magnetized in the direction perpendicular to the plane of the air gap, and standing is received in the recess of the movable magnetic bearing. When the stator part is made from a piece of ferromagnetic material, which contains a pole and a support made in the form of polar thickenings.

In the known solutions of the problem, consisting in the fact that the exact configuration of the slide is difficult, especially reciprocating motion of the slide can not always be controlled with the desired accuracy. The inaccuracy of the reciprocating movement is a disadvantage, especially in combination with the linear compressor, as it requires high precision positioning of the piston of the compressor, so that the dead volume in the piston compressor unit as small as possible. The reason for this is that when uncontrolled movement of the piston compressor, piston compressor with a very small a safe distance between the piston head and piston compressor last hits in the body of the piston or valve plate which could be damaged valve plate, piston compressor and the piston rod between the slider and the piston of the compressor. Although this problem can be prevented that a safe distance between the piston unit and the piston of the compressor is increased sufficiently, but the dead volume in the body of the piston must be small enough not too much to reduce the coefficient of gender is testing the validity of the linear compressor.

Known solution, which is to inaccuracies when the reciprocating motion be minimized through regulation so that the slide are the position sensors and the slider in a timely manner inhibited through appropriate adjustment of the drive coils. Such processes braking though, and can effectively prevent the stroke of the piston of the compressor, but are a disadvantage for achieving high efficiency, because the braking energy is lost to the system.

Disclosure of inventions

Therefore, the present invention is to create a linear actuator, the linear compressor and a refrigerating apparatus, in which the reciprocating motion of the moving parts can be controlled precisely as possible, and also to create a way by which products can be chilled or working environment can be compressed a particularly efficient and energy-saving way.

This problem is solved according to the present invention, by means of a linear actuator, via a linear compressor, through the refrigerating apparatus and by a method of cooling products and/or compression of the working environment, as described in the independent claims. Other preferred variants of the s implementation and development, which can be used individually or in any combination with each other, are the subject of the respective dependent claims.

As indicated, the main part of inaccurate positioning of the slide consists of the interaction of the slide with the stator without current flow through the drive coil. Force between the slider and stator are caused by the fact that the edges of the permanent magnet on the slide or change of magnetization of the permanent magnet on the slider interacts with the angles of the poles at the poles of the stator core. In the case of a known linear drives, RAM, depending on the deviation from its 5 position of rest nadavlivaya or toward the position of rest, or in the direction of him, even when through the drive coil does not flow any current. Symmetric calculation of the parameters of the slider or stator of action of the forces due to the interaction will be a centrally symmetric along the longitudinal axis relative to the position of rest. Since the action of the drive coils through which current flows, if possible, should be independent of the deflection of the slide, this interaction leads to undesirable distortion characteristics "power path"that leads to the described technical problems of control.

In the first embodiment of the invention the proposed izobreteny the m linear actuator includes a stator and moving it back and forth along the axis of the slider, the stator contains namagnichivaemost core with poles, and pole pillar are essentially in the direction of the slide, and provides that at least one bearing includes a beveled surface. The beveled surface may be made in the form of a chamfer.

In the second option proposed by the invention, the linear actuator includes a stator and moving it back and forth along the axis of the slider and the stator contains namagnichivaemost core with poles, and pole pillar are essentially in the direction of the slide, and provides that the slide contains a number of magnets arranged one behind the other in the axis direction, the length of which essentially corresponds to the sum of the width and the distance between the poles along the axis.

The third option proposed by the invention, the linear actuator includes a stator and moving it back and forth along the axis of the slider and the stator contains namagnichivaemost core with poles, and pole pillar are essentially in the direction of the slide, and the slide contains a number of magnets arranged one behind the other in the axis direction, and provides that the length of the magnets along the axis and/or the corresponding width of the poles along the axis and/or the distance between the poles along the axis of the E. by reason of what components of the efforts of the magnets along the axis in the de-energized state of the linear actuator essentially offset each other.

Thus, the part of the force, which has no impact current can be limited to values less than 30%, especially up to values less than 20%, preferably up to a value of less than 10% of the nominal strength of the linear actuator when working with static current.

By an appropriate choice of length, width and distance, the contribution of the forces generated by interaction of the first support with a first edge of the first magnet at least partially offset component of the efforts of the second support with a second edge of the first or the second magnet. By matching the lengths of the magnets on the slide with the width of the poles and the distance between the poles along the axis can be aligned power component of the efforts of the slide acting along the axis of the slide in the open circuit condition of the linear actuator, and at least partially mutually annihilating, in particular, the contributions of forces created separate legs or ends of the magnets.

Mainly the stator includes at least one drive coil, which may be generated magnetic field. The stator contains namagnichivaemost core, which consists especially of the many multi-layered sheet made of soft magnetic material is. The core may be made in the form of a coil core, meaning that it is at least partially surrounded by a coil, which is under the influence of current causes a corresponding magnetization in the core and leads to the concentration of the magnetic field in the area of the slide. The core delivers the magnetic field to the slider and having poles that are in the direction of the slide. Poles have at its free end, i.e. the end pointing to the slide, one pole. Support may include bulging, protruding along the axis of the pole, or to contain the ledge.

In an alternative implementation, the stator can be equipped with a permanent magnet and have the drive coil; in this case, the drive coil is provided on the slider.

It was found that undesirable axial component of the forces occurring as a result of interaction between the support and the slider can be reduced by at least one bearing includes a beveled surface. The beveled surface may be formed by chamfering. The beveled surface may be flat or convex, the convexity can be convex or concave. The preferred convex, that is, the curved outside surface.

These three options can be used together or independently of each other. Especially n impactfully the combination of the first and second options, and the combination of the first and third options.

Use of the invention eliminates the disadvantage of the known solutions, consisting in the fact that due to the interaction of the poles or supports to slide arise components of the effort that you can put on your own produced by the current of the coil force, and cause asymmetric shape characteristics "power-path of the slide. Asymmetry is significantly reduced, and the control slide is greatly simplified. As a consequence, the linear actuator can be accurately and efficiently, that is, despite the high accuracy of positioning to work with a small amount of braking or without them. Thereby achieving high reliability.

Mainly should be support for shaping treatment, taking into account the interaction between the support and the slide and also in de-energized state of the drive coil.

Under non-linear components of efforts are centrally symmetric about a point of symmetry components of efforts, which can be represented using non-linear polynomial. Linear power components are centrally symmetric about a point of symmetry components of efforts, which can be represented by a polynomial with only the straight-line exhibitors. By an appropriate choice of the length, distance and width to consider is Ino each other can be reduced nonlinear components of efforts along the axis in the total force along the axis or the share components of efforts existing without the impact of the current along the axis in the total nominal strength of the linear actuator along the axis under the influence of the current to a value less than 30%, especially up to values less than 20%, preferably up to a value of less than 10%.

Total power is the maximum power that feels the slider, when the linear actuator is operated with the associated unchanging nominal operating current.

Through various lengths, widths and distances corresponding magnets and support interact with each other so that a reduced force in the axial direction in de-energized condition. The reducing component of the effort is always to the work area of the RAM, that is, applies only to those components of efforts that occur during the working stroke of the RAM. The components of effort, outside of the workspace will not be considered.

In various embodiments of the engagement of the slide with poles namagnichivayushchego core on the stator affected to the extent that will be reduced undesirable axial components of the effort that is already present in the de-energized state of the linear actuator.

In one implementation options of the bearing on the outer side relative to the direction of the axis has a beveled surface. In particular, both external support include a beveled surface. Using skosana the surface decreases the local distortion of the magnetic field on the external support, resulting in reduced components of the forces acting in the longitudinal direction.

In another embodiment, the implementation support includes a protrusion, which is stretched to at least one adjacent support. Especially there are two tabs on the support, which are extended to the adjacent supports. Through a combination of the beveled surface at the pole and hanging on the same and/or other support may be the impacts of efforts in the longitudinal direction. While the tabs are predominantly provided on poles lying along the axis inside, and on the support provided by the two tabs.

On both external supports provided mainly by one beveled surface and a ledge. The protrusion may be provided on the inner leg, lying inside relative to the direction of the axis.

The protrusion may be provided on the outside of the pole lying on the outside relative to the direction of the axis.

This projection the distance between the two poles along the axis can be reduced by at least 15%, especially at least 20%, preferably at least 25%. Thus the distance between two adjacent poles can be reduced by more than 15%, in particular more than 40% or more than 50%, if both of the neighboring poles contain the ledge, pointing to another ledge.

The ledge can be trapezoidal the m along the axis in the longitudinal section. Primarily, the axial longitudinal section of the beveled surface essentially corresponds to the axial longitudinal cross-section of the ledge.

The beveled surface may be formed by a flat surface that is Nakano to the axis and has an angle of inclination to the axis in the range from 20° to 70°, in particular in the range from 20° to 60°, preferably in the range of from 40° to 50°. The beveled surface may also be curved, in particular convex, that is, to speak out.

In another implementation, there is one internal pole and two pole adjacent along the axis. The stator contains predominantly at least two drive coils, the coils of which is essentially perpendicular to the axis, and the coils are on the same side of the axis. The magnets are magnetized in the direction perpendicular to the axis.

The stator may include at least one drive coil, especially at least two drive coils, which are located opposite each other relative to the slider. The drive coil contains the axis of the coil and the axis of the coil in the field poles poles essentially perpendicular to the axis.

Mainly the slider contains many along axis one after the other, alternately oppositely polarized magnets, especially many of magnets arranged one behind the other and peperami is but oppositely polarized in the direction perpendicular to the axis. The magnetic field of the magnet is mainly at the poles at least 0.6 Tesla, preferably at least 0.8 Tesla.

In an advantageous variant of realization of the slider contains a number of magnets arranged one behind the other in the axis direction, the length of which is different.

Thus, for example, one behind the other can be there are three magnet, both external magnet are of the same length, which differs from the length of the inner magnet located between the two outer magnets. When the magnets are symmetrical, but different lengths are such that the current along the direction of the axial force caused by the first pole and the first magnet is at least partially compensated current in the opposite direction along the axis of the force caused by the second pole and the second magnet.

Similarly, the stator may contain more than three poles, the width of which is different. Further, the stator may contain more than three poles, and the distance between the poles along the axis are different. Also thanks to the calculation of the width and the respective distances between the poles can be achieved mutual compensation of the forces in the axial direction.

In a preferred embodiment, the slider has a lot of magnets arranged one behind the other in the direction of the axis whose length is the width and RA is standing between the poles along the axis of the calculated the strength of individual magnets along the axis without affecting the current of the drive coil are mutually compensated, at least partially, and especially by the stroke of the RAM acting along the axis of maximum power less than 30%, especially less than 20%, preferably less than 10% of the maximum force acting along the axis when exposed to a current. Maximum power is determined by the linear actuator at a constant maximum rated current within a workspace. Through superposition and application of certain forces is significantly reduced unwanted total force along the axis. This simplifies the regulation of the linear actuator and, thus, improves the control of the reciprocating movement of the slider.

In a special embodiment of the proposed invention, the linear actuator includes at least one of the following characteristics with (α1) (α8):

(α1) pole (5, 6) are in the direction of the axis (3) width (B1) in the range from 10 mm to 40 mm, in particular from 15 mm to 25 mm;

(α2) beveled surface (9) is in the direction perpendicular to the axis (3) height (H1) in the range from 2.5 mm to 5.5 mm, in particular in the range from 3.5 mm to 4.5 mm;

(α3) beveled surface (9) is in the direction of the axis (3) width (B2) in the range from 1 mm to 3 mm, in particular in the range from 1.5 mm to 2.5 mm;

(α4) tabs (12, 13) are in the direction of the PE pendicular axis (3) height (H2) in the range from 2.5 mm to 5.5 mm, in particular in the range from 3.5 mm to 4.5 mm;

(α5) tabs (12, 13) are in the direction of the axis (3) width (B3) in the range from 1 mm to 3 mm, in particular in the range from 1.5 mm to 2.5 mm;

(α6) of the slider (7) has a length (L1) in the direction of the axis (3) in the range from 30 mm to 100 mm, in particular in the range from 50 mm to 70 mm;

(α7) pole (5, 6) are in the direction of the axis (3) distance (A1) in the range from 5 mm to 20 mm, in particular from 8 to 12 mm;

(α8), a plurality of magnets (22, 23) and the set of poles (5, 6), length (L2) of the magnets (22, 23) in the direction of the axis (3) corresponds essentially to the sum of the width (B1) and the distance (A1) between poles (5, 6) along the axis (3).

While signs with (α1) (α8) can be applied individually or in any combination with each other. Particularly advantageous is the combination of signs with (α1) (α8).

In a special variant of realization of at least one bearing linear actuator includes a beveled surface, and the slider contains a number of magnets arranged one behind the other in the axis direction, the length of which essentially corresponds to the sum of the width and the distance between the poles along the axis.

The proposed invention is the linear compressor includes a piston unit, the piston of the compressor, moving in the piston block reciprocating along the axis, and the invention of the linear actuator. Advantages of the proposed invention, the linear actuator is transferred to the linear compressor so the movement of the piston of the compressor can be regulated particularly accurately, so that the piston of the compressor may be directed especially close to the valve plate in the piston unit, and thus, the void volume can be kept particularly small. Thereby, the efficiency of the linear compressor is increased, and the compression of the working environment, especially of the refrigerant, can be achieved effectively and energy-efficient way.

Refrigerating apparatus, particularly a refrigerator and/or freezer or air conditioning, contains proposed by the invention of the linear actuator and/or proposed by the invention is the linear compressor. Because of the improved ability to regulate or control the movement of the piston of the compressor of the refrigerating apparatus can be operated accurately, reliably, more efficiently and with greater energy savings.

Proposed by the invention a method of cooling products and/or compression of the working environment uses proposed by the invention is a linear actuator proposed by the invention is the linear compressor and/or proposed by the invention is the refrigeration apparatus. Thanks to an efficient, reliable and energy-saving operation of the linear actuator, the linear compressor and/or refrigeration apparatus is made possible efficient, reliable and energy-efficient cooling products or compressed the e production environments. Thereby, it is possible a particularly efficient cooling products.

The piston of the compressor based contactless mainly using gas cushion, that is, using the casing wall having holes, and the through hole is blown in the working environment, which forms a gas cushion between the piston of the compressor and the housing wall.

Brief description of drawings

Other priority details and special options for implementation are explained hereinafter with the aid of the following drawings, which do not limit the present invention, and only illustrate it in an example. They schematically shown following.

Figure 1: the proposed invention is the linear compressor is a longitudinal section along the axis of motion.

Figure 2: the proposed invention is the linear compressor is a longitudinal section along the axis of motion.

Figure 3: proposed by the invention is the refrigeration apparatus with the application of the proposed invention, the linear compressor of figure 2.

Figure 4: a graph that shows the impact of individual components of the force on the slider at a constant current for known solutions.

Figure 5: a graph that shows the impact of individual components of the force on the slider at a constant current for the proposed invention is a linear actuator.

The implementation of the invention

Figure 1 shows the proposed invention the linear actuator 1 in a longitudinal section along the axis 3 motion and along the axis 21 of the drive coil 16, 20 on the stator 2. Linear actuator 1 includes a stator 2 and the slider 7, and the slider 7 oscillating moving the reciprocating along the axis 3 between two points of return. The stator 2 includes a conductive core 4 with the inner pole 5 and two outer poles 6, each of which contains a support 8, 33, passes essentially in the direction of the slide 7. On the inner pole 5 is the inner bearing 8, and the outer pole 6 is an external bearing 10, 33. Supports 8, 10, 33 contain the beveled surface 9 and/or the protrusion 12, 13. The beveled surface 9 may be made in the form of a flat surface 14 or in the form of a convex curved surface 15. The inner bearing 8 has a first protrusion 12 and the second protrusion 13, which are directed respectively to the adjacent external supports 10, 33. The tabs 12, 13 along the axis 3 in the longitudinal section is trapezoidal. The slider 7 includes the first magnet 22 and the second magnet 23, which are magnetized in the direction perpendicular to the axis 3 and have different polarity. The magnets 22, 23 are magnetized parallel to each other. The magnets 22, 23 communicate with the supports 8, 10, 33. The stator 2 has located opposite each other relative to the slider 7 drive coil 16, 20, the axis of the coils 21 which is perpendicular to the axis 3. By means of the projections 12, 13 and the beveled surfaces 9 of the axial force components on the slide 7, to the which affect the slider 7 even without current flow through the drive coil 16, 20 significantly reduced, especially reduced nonlinear force component of the slide 7 along the axis 3. The distance A1 between the poles 5, 6 along the axis 3 is 10 mm, the Width B1 of the poles 5, 6 in the direction along the axis 3 is 20 mm Width B2 beveled surface 9 in the direction along the axis 3 is 2 mm, the Width B3 of the projections 12, 13 in the direction along the axis 3 is 2 mm, the Length L1 of the slide 7 along the axis is 60 mm, the Length L2 of the magnets 22, 23 of the slide 7 is 30 mm, the Height H1 beveled surface 9 in the direction perpendicular to the axis 3 is 4 mm, the Height H2 of the protrusions 12, 13 10 direction perpendicular to the axis 3 is 4 mm, the Angle β is approximately 45°, the length D1 is 15 mm, the length D2 is 35 mm, length D3 is 4.1 mm, length D4 is 6 mm.

Figure 2 shows the proposed invention is the linear compressor 17 with the proposed invention, the linear actuator 1 in section, and the slider 7 linear actuator 1 moves the reciprocating along the axis 3. The slider 7 transmits the force through the piston rod 28 of the piston 27 of the compressor, the piston 27 of the compressor based contactless piston unit 26, using the walls 30, containing holes 29, through the working medium supplied through the input 32 and flows through the holes 29. The piston rod 28 has two narrow section 31. Using narrow sections 31 can vosprinimatj the bending forces and prevented distortion, what is very important especially for the piston 27 of the compressor driven by a gas cushion. Thanks this is made possible sliding of the piston 27 of the compressor along a wall 30 with low friction losses. Piston unit 26 includes a valve plate 34, and the suction connection 35 and the pressure connection 36, respectively. Through uniform distribution of forces along the axis 3 simplified control movement of the slide 7, and achieves superior precision movement of the piston 27 of the compressor. This makes possible a greater approximation of the piston 27 to the valve plate 34 on the piston unit 26, and, thus, can be reduced dead volume in front of the valve plate 34, and the piston 27 of the compressor is not hit on the valve plate 34.

Figure 3 shows the proposed invention is the refrigeration apparatus 18, made in the form of a refrigerator by which products 18 can efficiently, reliably and smoothly to cool. Refrigerating apparatus 18 includes proposed by the invention is the linear compressor 17.

Figure 4 shows a graph which represents the force components in the direction of the axis 3 at a constant rated current coil in the well-known linear actuator. The solid line 38 shows the total force acting on the slider 7. The dashed line 40 shows the nonlinear component corresponding to C is e, when through the drive coil 16, 20 no current flows. The dotted line 39 shows a linear component, which occurs when through the drive coil 16, 20 runs rated current coil. As you can see, in the well-known linear actuator non-linear component 40 leads to a significant asymmetry of the total acting force 38, and, thus, the control slide 7 should occur depending on the progress of X move, which makes the regulation or control of the linear actuator 1 is significantly more difficult.

Figure 5 shows a graph which reproduces the various components of the power impacts for the proposed invention, the linear compressor 1 according to the course of movement of the slide 7 from its Central position. Shows 15 that the nonlinear component of the force components along the axis 3 substantially reduced, and, thus, the overall strength is in the following range from -11 mm to +10 mm approximately constant. In de-energized state of the drive coils 16, 20 on the slider 7 operates substantially reduced power.

The invention relates to a linear actuator 1, containing the stator 2 and axis 3, and reciprocating the slider 7, and the stator 2 includes namagnichivaemost conductive core with 4 poles 5, 6, and poles 5, 6 are directed pillar 8, 10 essentially to the slider 7, and, on ENISA least one bearing 8, 10 includes a beveled surface 9, or slide contains many magnets 22, 23, which are located one behind the other in the direction of the axis 3, and the corresponding length L2 of the magnets 22, 23 along the axis 3 and the corresponding width B1 of poles 5, 6 along the axis 3 and/or the distance A1 between the poles 5, 6 along the axis 3 is made different so that the components of the effort on the slide 7 along the axis 3 in the de-energized state of the linear actuator 1 is reduced. The invention relates also to a linear compressor, cooling apparatus and cooling method and, accordingly, to a method of compression of the working environment. The invention differs in that by the fact that the supports 8, 10 contain the beveled surface 9 or by an appropriate selection of lengths, widths and distances between the poles 5, 6 decrease unwanted components of efforts along the axis 3, and, thus, improved ability to manage or control the reciprocating movement of the slide 7.

1. Linear actuator (1), containing the stator (2) and moving it back and forth along the axis (3) of the slide (7)and the stator (2) contains namagnichivaemost conductive core (4) with poles (5, 6), and screw (7) contains a lot of alternately oppositely polarized magnets (22, 23)arranged one behind the other in the direction of the axis (3), PR is than the stator (2) contains, at least two drive coils (16, 20)located opposite each other relative to the slider (7), and alternately oppositely polarized magnets (22, 23) of the slide (7) have in the direction of the axis (3) length (L2), which essentially corresponds to the sum of the width (B1) of the poles (5, 6) and the distance (A1) between poles (5, 6).

2. Linear actuator according to claim 1, characterized in that the bearing (10, 33) of the outer pole (6) on the outer side relative to the direction of the axis (3) contains a beveled surface (9), in particular, two supports (10, 33) external poles (6) contain the beveled surface (9).

3. Linear actuator according to claim 2, characterized in that the pole (5, 6) includes a protrusion (12, 13), which is stretched in at least one adjacent pole (5, 6), in particular a pole (5, 6) contains two tabs (12, 13), each of which stretches to the adjacent poles (5, 6).

4. Linear actuator according to claim 3, characterized in that the protrusion (12) is provided on a support (8) lying inside relative to the direction of the axis (3) pole (5).

5. Linear actuator according to claim 3, characterized in that the protrusion (12) is provided on a support (10) lying on the outer side relative to the direction of the axis (3) pole (6).

6. Linear actuator according to one of p 5, characterized in that the distance (A1) between poles (5, 6) along the axis (3) this projection (12, 13) is reduced by at least 15%, especially at least 20%, preferably mini the mind by 25%.

7. Linear actuator according to one of p 5, characterized in that the projection (12, 13) along the axis (3) in a longitudinal incision is made trapezoidal.

8. Linear actuator according to one of claim 2 to 5, characterized in that the axial longitudinal section of the beveled surface (9) essentially corresponds to the axial longitudinal cross-section of the protrusion (12, 13).

9. Linear actuator according to one of claim 2 to 5, characterized in that the beveled surface (9) is formed by a flat surface (14).

10. Linear actuator according to claim 9, characterized in that the flat surface (14) is inclined to the axis (3) and has an angle (β) to the axis (3) in the range from 20 to 70°, in particular in the range from 20 to 60°, preferably in the range of from 40 to 50°.

11. Linear actuator according to one of claim 2 to 5, 10, characterized in that the beveled surface (9) contains a curved surface (15), in particular a convex curved surface.

12. Linear actuator according to claim 1, characterized in that the drive coil (16, 20) contains the axis (21) of the coil and the axis (21) of the coil in the field (11) poles poles (5, 6) essentially perpendicular to the axis (3).

13. Linear actuator according to one of claims 1 to 5, 10, 12, characterized in that the slider (7) contains many magnets (22, 23)arranged one behind the other and alternately oppositely polarized in the direction perpendicular to the axis (3).

14. Linear actuator according to one of claims 1 to 5, 10, 12, characterized those who, the maximum force acting along the axis (3) when working stroke of the slide (7), less than 30%, in particular less than 20%, preferably less than 10% of the maximum force acting along the axis when exposed to a current.

15. Linear actuator (1) according to one of claims 1 to 5, 10, 12, characterized, at least one of the following characteristics with (α1) (α7):
(α1) poles (5, 6) are in the direction of the axis (3) width (B1) in the range from 10 to 40 mm, in particular from 15 to 25 mm;
(α2) beveled surface (9) is in the direction perpendicular to the axis (3), the height (H1) in the range from 2.5 to 5.5 mm, in particular in the range from 3.5 to 4.5 mm;
(α3) beveled surface (9) is in the direction of the axis (3) width (B2) in the range from 1 to 3 mm, in particular in the range from 1.5 to 2.5 mm;
(α4) tabs (12, 13) are in the direction perpendicular to the axis (3), the height (H2) in the range from 2.5 to 5.5 mm, in particular in the range from 3.5 to 4.5 mm;
(α5) tabs (12, 13) are in the direction of the axis (3) width (B3) in the range from 1 to 3 mm, in particular in the range from 1.5 to 2.5 mm;
(α6) of the slider (7) has a length (L1) in the direction of the axis (3) in the range from 30 to 100 mm, in particular in the range from 50 to 70 mm;
(α7) poles (5, 6) are in the direction of the axis (3) distance (A1) between them in the range of 5 to 20 mm, in particular from 8 to 12 mm;

16. Linear compressor (17)containing a piston unit (26), the piston (27) of the compressor, moving in on sneva block (26) reciprocating along an axis (3), as well as the linear actuator (1) to move the piston (27) of the compressor, as claimed in one of claims 1 to 15.

17. The refrigeration apparatus (18), in particular a refrigerator and/or freezer, or air conditioning, containing a linear compressor, as stated in article 16.

18. Method of cooling products (19) and/or compression of the working medium, characterized in that use refrigeration apparatus, as claimed in 17.



 

Same patents:

FIELD: electricity.

SUBSTANCE: invention is a machine (linear valve induction generator motor) that can equally operate as a generator and as a motor and possesses a number of characteristics allowing optimisation of weight and power ratio as well as production costs. The machine concerned has several air clearances crossed by a single magnetic flux wherein magnetising force is formed. The flux is generated by a series of coils (6) arranged on active parts The active parts are two frames (4) and (5) whereon the magnetic flux is grounded. In the above magnetic circuits other active parts may exist wherethrough the magnetic flux grounding fails to occur. A series of passive elements (habitually represented by transducers (1) and (2)) in the course of their motion relative to the active parts cause change of the circuit magnetic with respect to the position causing magnetic force. The most unique feature of the invention consists in the magnetic flux returning through only two butt-end active parts (4) and (5).

EFFECT: reduction of stray flux at the poles of the proposed generator motor and reduction of its mass, weight and cost.

2 cl, 2 dwg

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, particularly to linear permanent magnet stepper motors and can be used in industrial, transport and electromechanical systems. The linear stepper motor has main imbricated cores with stator heelpieces 1, with wide cores 2 and with narrow cores 3, high-coercivity permanent magnets 4, two-phase winding 5 with phases A and B, and an additional imbricated core 8. Plates 6 are mechanically connected to a nonmagnetic plate 10 and form a liner. Plates 7 are mechanically connected to the stator by a nonmagnetic plate 11. Each plate has alternating ferromagnetic and nonmagnetic elements, lying crosswise. All magnetic elements of the plates and all teeth have the same lateral dimensions. Magnetic elements of the plate of the liner are at equal distance from each other, which determines the tooth spacing. Teeth on the wide and narrow cores are shifted by half the tooth division, and teeth on cores of neighbouring stator magnetic circuits - by quarter of the tooth division. Teeth of main stator magnetic circuits, additional magnetic circuit and magnetic elements of the plate, joined to the stator, have the same longitudinal position. Phases A and B lie alternately on wide cores. Neighbouring permanent magnets are magnetised tangentially and head-on.

EFFECT: improved weight and size characteristics.

3 dwg

FIELD: electrical engineering.

SUBSTANCE: invention relates to electronics and can be used for making a machine with discrete translational unrestricted motion of the actuating element. The device contains a stator, which consists of a side member (2) and a bottom part (1). A winding (9) is put into a stator bore. The armature is composite and consists of a cylindrical part (3) and has disc-shaped part (4) on the side of the guide housing (6). Between the bottom part of the stator (1) and the cylindrical part of the armature (3) there is recoil spring (10). The actuating element (13) can be in form of a rope, flexible bar or wire, let through the axial channel of the armature through an opening in the guide housing (6) and the bottom part of the stator (1). Power articulation of the actuating element with the armature in the working stroke is provided by spring-loaded keying on cone-shaped elements (11), for example in form of locking pieces, opened by a releasing mechanism in form of a double-arm swivelling lever (5) during the working stroke, put into the cavity of the disc-shaped part of the armature (4) with one arm, and on locking members (11) by the second arm. The lever has a through-hole where the actuating element is put. Coaxiality of the armature and the stator is provided by guide pins (8).

EFFECT: simpler design with widening of operating capabilities and field of use.

1 dwg

FIELD: engines and pumps.

SUBSTANCE: invention is related to electric machines to linear step motors for discrete electric drive. Linear electric motor comprises the following: stator 1 that consists of magnetic body 2, inside of which between magnetic poles 3 magnetising coils 4, 5, 6 and 7 are installed, intermediate poles 8, which are fixed by non-magnetic inserts 9 on thread 10. Magnetic poles 3 of every coil 4, 5, 6, and 7 are separated between each other by non-magnetic rings 11, which are fixed by pins 12. End magnetic pole 13 is fixed to magnetic body 2 by bolt 14. Anchor 15 consists of magnetic 16 and non-magnetic 17 rings placed in alternating sequence on non-magnetic rod 18. Shape of section in ends of magnetic poles 3, intermediate poles 8 and end pole 13 is created with faces 19 and 20. Shape of section in ends of magnetic rings 16 is created by faces 21. The main magnetic flow F, which is separated into working magnetic flow F1, passing through working gap 5, and parasite magnetic flows F2 that swells to the side of magnetising coil 4, and F3, that closes practically in center of anchor 15.

EFFECT: increased efficiency factor.

1 dwg

FIELD: electromechanical engineering.

SUBSTANCE: proposed linear motor that can be used for driving submersible and transfer pumps, compressors, for moving cargoes, doors, catches, and the like has its inductor made in the form of a number of circular cores spaced through certain distance apart, each core being provided with two pole shoes and annular coils of phase winding in-between. Cylindrical armature provided with annular pole shoes is installed inside or outside of inductor for slip displacement. Motor magnetic-circuit cores can be made of solid magnetically soft material or of specifically shaped thin-sheet steel lamination. As an alternative, motor can be made with circular permanent magnets on armature. Linear-motor tractive force is produced upon connection of winding phase leads to electronic switch operating in response to instructions arriving from armature position sensor.

EFFECT: facilitated manufacture of motor stator, reduced size, enhanced efficiency.

5 cl, 6 dwg

FIELD: mechanical engineering.

SUBSTANCE: invention relates to device including internal combustion engine with piston installed for free mechanical displacement in housing. Device is adapted to provide combustion of fuel mixture to create force pushing the piston. Device includes electromagnetic energy converter and external current circuit connected with energy converter to exchange forces acting towards energy converter and from energy converter. Control unit is adapted to control direction of forces exchanged between energy converter and external current circuit during operation of device. Invention relates to device used for generating electric energy and to vehicle with such device.

EFFECT: provision of high efficiency.

27 cl, 8 dwg

FIELD: electrical engineering; dynamoelectrical machines including power generators.

SUBSTANCE: proposed electrical machine using separate and coordinated positive and negative interaction forces between primary part 2 and secondary part 3 has its primary part incorporating one or more pairs (C1, C2) of pole groups (E1, E2; E3, E4) with pole groups of at least one pair mechanically isolated and electrically offset relative to one another through pole pitch p; each pole group has ferromagnetic core (A1, A2, A3, A4) and at least electromagnetic winding (B1, B'1, B2, B'2, B3, B'3, B4, B'4); its secondary part 3 has series of alternating reverse-polarity permanent magnets (31, 32 through 310) and associated control system 5. Each pole pitch corresponds to (n + 1/2) of permanent magnet size in this direction, where n equals 0 or positive integer number. Magnetic forces are balanced out due to typical paired disposition of pole groups acting separately during conductive pole pitches p1, during power supply to electromagnetic windings, and in absence of power supply during neutral pole pitches p2 next to pole pitches p1; each pole pitch corresponds to (n + 1/2) of permanent magnet size, where n equals 0 or positive integer number; control system can build up electromagnetic forces between primary part 2 and secondary part 3 which are balanced by permanent-magnet forces.

EFFECT: enhanced effectiveness of energy conversion by dynamoelectrical machine.

15 cl, 9 dwg

The invention relates to electrical engineering and can be used in devices with discrete translational movement of the working body, for example, in robotic manipulators, automation systems and electric drive feed cutting machines

The invention relates to the field of electrical engineering, namely, linear stepper motors

The invention relates to electrical engineering, namely to stepper motors

FIELD: electricity.

SUBSTANCE: housing (30) or rotary electric machine includes one inlet hole (31) and one outlet hole (32). Cooling device (15) in housing (30) includes circulating fan (12) and the first air circulation channel (51) and the second air circulation channel (52). In the first air circulation channel (51) the air received from inlet hole (31) flows down towards rotating shaft (10), moves near one of bearings, and then it is supplied to radial gap (24) in order to flow along axial direction, and flows through radial grooves and leaves outlet hole (32). In the second circulation channel (52) the air received from inlet hole (31) diverts from direction of movement to rotating shaft (10), moves from outer side of stator (20) in axial direction and then flows towards rotating shaft (10), moved near other bearings and then, it is supplied to radial gap (24) in order to be moved along axial direction, and flows through radial grooves and leaves outlet hole (32).

EFFECT: improving mass and dimensions parameters of rotary electric machine with its cooling device by installing this machine together with its auxiliary equipment in smaller space at maintaining cooling conditions of rotary electric machine.

7 cl, 3 dwg

FIELD: electricity.

SUBSTANCE: rotation system and method of transmission wheel providing heat transfer and/or moisture transfer between two air counter-flows. System includes the following: frame, transmission wheel containing transmission matrix installed and fixed with possibility of being rotated on frame so that wheel can be rotated in two air counter-flows, and heat transfer and moisture transfer can occur between two air counter-flows; the first group of engine elements, which is fixed relative to wheel so that elements of the first group perform function of engine rotor; and the second group of engine elements fixed relative to frame so that elements of the second group perform the function of engine stator; in which electric energy supplied to engine elements of the second group induces rotation of transmission wheel through two air counter-flows.

EFFECT: simpler heat exchange system.

10 cl, 6 dwg

FIELD: electricity.

SUBSTANCE: noncontact electric motor includes hollow cylindrical nonmagnetic slotless stator with winding, which is arranged between parts of composite rotor. Outer part of rotor is made in the form of ferromagnetic shell, and inner part is made in the form of cylindrical constant magnet fixed on shaft in bearings. The latter are arranged in support sleeves of stator ends, which can be made from heat-resistant dielectric material.

EFFECT: improving positioning accuracy of rotor axis and improving reliability of proposed noncontact electric motor at simultaneous simplification of its design and manufacturing procedure, reduction of weight, dimensions and manufacturing costs.

2 cl, 1 dwg

FIELD: electricity.

SUBSTANCE: invention relates to features of an electromechanical converter design with liquid cooling, which is mainly designed for slow-speed devices and may be used, for instance, as an electric motor in drum hoists or motor-wheels of light vehicles, as an electric generator in wind-driven power plants or as a starter generator in petroleum and diesel generator stations, electric vehicles with a combined power plant, as a synchronous compensator, a motor for elevators and in other devices, where high specific characteristics are required, or expanded functional capabilities. The electromechanical converter with liquid cooling of stator windings comprises at least one stator-rotor pair, in which a stator has a power frame arranged in the form of a flange of the fixed converter axis, along a circular perimetre of which there are teeth of material with high heat conductivity, between which there are stator windings arranged in cores with high magnetic permeability. At the same time according to this invention the specified stator teeth include holes for passage of cooling liquid, and the stator flange body contains discharge and drain headers of a cooling liquid, which communicate with the following holes.

EFFECT: increased efficiency of the electromechanical converter stator winding cooling, increase of its specific capacity and rotation torque at its lower angular frequencies of rotation and specified dimensions with simultaneous reduction of weight, increase of its efficiency factor and expansion of the application field.

3 cl, 3 dwg

FIELD: electricity.

SUBSTANCE: device is proposed in an electric machine, in particular, a motor, a generator or an actuator, comprising a stator with teeth (11, 12), which carry coils (15), in particular, single-layer ones, for concentrated windings, a rotor with a permanent magnet moves relative to the stator (11, 12). The stator teeth are arranged with the possibility to locate coils (15) on them generally with a rectangular hole. Advantages are achieved, if the teeth (11, 12) of the stator are made with the possibility to locate generally identical coils (15) on them, which close slots (14, 16). The teeth (11, 12) are alternating rectangular teeth that narrow/expand towards the top and form slots (14, 16) with parallel lateral sides for installation of coils (15). Narrowing teeth (22) preferably have a shorter top (23). Slots have a space to insert a semi-magnetic slot wedge (17, 18) between neighbouring teeth.

EFFECT: simplified and cheaper electric machine with concentrated windings with simultaneous provision of its compactness and high efficiency factor.

2 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: electric motor includes rotor and stator with the main and auxiliary poles with pole tips and windings offset relative to each other through the half of pole pitch along poles of the main phase, as well as non-magnetic through gaps are made in stator yoke and pole tips, which are adjacent to them. Yoke is common for both systems of poles, and poles of auxiliary phase and stator yoke and pole tips, which are adjacent to them, are solid.

EFFECT: increasing electromagnetic starting moment of electric motor, which can provide reliable start-up at availability of increased load on shaft.

6 dwg

FIELD: electricity.

SUBSTANCE: in the proposed magnetic conductor of electric machine stator, which consists of yoke with teeth from sheet steel according to this invention the above teeth are provided with open slots; at that, on teeth there are grooves into which tooth tips from dielectric magnetic soft composite material are installed and fixed in the above grooves of teeth with wedges from dielectric non-magnetic material.

EFFECT: high magnetic permeability of magnetic conductor of stator at simultaneous improvement of its manufacturability.

2 dwg

FIELD: electricity.

SUBSTANCE: in the proposed magnetic conductor of electric machine stator, which consists of yoke with teeth from sheet steel according to this invention the above teeth are provided with open slots; at that, on teeth there are grooves into which tooth tips from dielectric magnetic soft composite material are installed and fixed in the above grooves of teeth with wedges from dielectric non-magnetic material.

EFFECT: high magnetic permeability of magnetic conductor of stator at simultaneous improvement of its manufacturability.

2 dwg

FIELD: electricity.

SUBSTANCE: proposed rotor assembly includes superconducting winding assembly located in cryogenic zone of rotor assembly. The above rotor assembly includes torque transmission assembly which according to this invention includes the first and the second pipes which are located with a radial gap outside the assembly of superconducting winding and which pass along longitudinal axis of rotor assembly. Besides, superconducting rotating machine containing such torque transmission assembly is proposed.

EFFECT: improved operational characteristics.

18 cl, 5 dwg, 2 app

FIELD: electricity.

SUBSTANCE: in electric machine the stator in the form of a circular structure of "П"-shaped form with anchor winding and toroidal excitation winding is taken out to the value of the average radius of the anchor magnetic conductor, determined by calculation, and the disc rotor with double-sided arrangement of ferromagnetic poles is structurally combined with the shaft by radially aligned rods-spikes, which provides for considerable increase of circumferential speed of poles, and accordingly, of electromotive force of the anchor winding, and accordingly, reduction of the anchor winding resistance, which provides for achievement of technical result, consisting in increase of efficiency factor of this electric machine at low values of angular frequency of rotor rotation. The possibility is also provided to use a modular principle of the electric machine, which simplifies technology of manufacturing low-speed electric machines of high capacity (over 100 kW), and also increases specific values of capacity and torque.

EFFECT: improved specific indices of electric machine, which is especially evident in zone of low reducer-free speeds of rotation with considerable reduction of electric machine manufacturing labour intensity as a whole.

5 dwg

FIELD: heating.

SUBSTANCE: test-bench for testing absorption-compression cooling aggregate consists of subject to testing absorption circuit, of compression circuit and of heat insulated two-section capacity. The absorption circuit contains an absorption device and a system of measuring and regulating equipment. The compression circuit contains a compression aggregate and its own system of measuring and regulating equipment. The suction pipeline of the compression aggregate is installed into the first section of the two-section capacity, while the coil of the absorption device is installed into the second section of the two-section capacity. The said sections are successively connected to the cooling system. The compressor of the compression aggregate is equipped with the cooling system. Water-ammonia solution flows to a generator of the absorption circuit from a cooling head of the compressor via gate valves to the generator of the absorption circuit. The test bench is additionally equipped with oil-cooler coil installed in the compressor via the gate valve connected to an absorber at inlet, and connected to the generator of the absorption circuit at outlet.

EFFECT: facilitating investigation of operational characteristics of absorption-compression cooling aggregates under conditions of cylinder head cooling and oil bath.

1 dwg

Up!