Straight-running actuating electric mechanism

FIELD: electricity.

SUBSTANCE: invention is related to electric engineering and may be used in electric machine industry, namely, in electromechanical power devices, in particular, in straight-running actuating electric mechanisms for movement of working elements of different machines and in the most different areas of machine building, metallurgy, etc. Straight-running actuating electric mechanism contains casing, on which electric motor is installed as well as screw with master and slave pulleys and drive belt, protective tube with front bushing, in which stem with power nut is installed with the possibility of longitudinal displacement. Induction limit switches are installed in the window of protective tube with the possibility of precise and independent tuning motion in parallel guides provided in the form of threaded pins and slots installed in the box. On external surface of stem opposite to every limit switch deepenings are provided that are displaced in relation to each other in angular and axial direction, and inclined flat - opposite to induction position sensor installed in front bushing.

EFFECT: increase of technological resources of straight-running actuating mechanism.

5 cl, 6 dwg

 

The present invention relates to the field of electrical engineering, namely, Electromechanical power devices, in particular to linear Executive mechanism for moving the working bodies of the various units, and can be used in various fields of engineering, metallurgy and so on

Known linear Executive electromechanism Firm "Servomech" (Italy) series UAL 2...4 (Servomech.ru page 5, 97, 98), comprising a housing that contains a motor and screw with pulleys and a drive belt, the protective tube with the front sleeve, which is placed with the possibility of longitudinal movement of the rod with the power nut supplied with inductive limit switches and device antipoverty rod with the key.

However, this electromechanism has the following disadvantages: low technological capabilities due to the lack of a manual drive mechanism, so it is impossible to move the rod manually, for example when commissioning, the breakage of the belt or a power outage. Additionally, there is no ability to customize inductive limit switches and, hence, adjustment of the stroke of the rod. Moreover, there is no position sensor and therefore it is impossible to determine the stroke of the rod.

In addition, the known linear Executive electromechanism (patent Ro the Russian Federation No. 2297088 C1, CL NC 7/10, 7/06), which is the prototype of the present invention and comprising a housing that contains the electric motor and the screw with the master and the slave pulleys and a drive belt, the protective tube with the front sleeve, which is placed with the possibility of longitudinal movement of the rod with the power nut supplied with inductive limit switches located in the window with the possibility of longitudinal displacement and device antipoverty shaft with key, which covers the liner having inner and outer side surfaces.

However, this electromechanism has the following disadvantages: low technological capabilities due to the lack of a manual drive mechanism, so it is impossible to move the rod manually, for example when commissioning, the breakage of the belt or a power outage. In addition, there is no possibility of fine tuning the inductive limit switches (KB) and, therefore, accurate adjustment of the stroke of the rod. Moreover, there is no position sensor and therefore it is impossible to determine the stroke of the rod.

In addition, the location of the KB on the protective pipe near the body does not allow it to position the center of gravity of electromechanism its pivot bearing, which makes it difficult to move the swing (swing) the bodies of the units, because it requires its hinge is installed.

The task of the invention is to increase technological capabilities.

This object is achieved in that in the linear Executive electromechanism, comprising a housing that contains the electric motor and the screw with the master and the slave pulleys and a drive belt, the protective tube with the front sleeve, which is placed with the possibility of longitudinal movement of the rod with the power nut supplied with inductive limit switches located in the window with the possibility of longitudinal displacement and device antipoverty shaft with key, which covers the liner having inner and outer side surfaces, introduced: the mechanism of a manual actuator mounted on the housing from the side of the secondary pulley, the device fine tuning inductive limit switches and inductive a position sensor mounted on the front sleeve of the protective tube, in which their placement made in accordance with the window opening, with limit switches installed in parallel guides with independent from each other move, and on the outer surface of the rod, opposite each limit switch is made at least one recess at an offset relative to each other in angular and axial direction, opposite the position sensor, the Aulnay, sloping flats, and the amount of axial displacement of the recesses L is: L≥L1-L2where L1- maximum working stroke; L2- the maximum longitudinal distance between the limit switches, and the angle of inclination of longitudinal flats "αis: α≤arctgl/L1where l is the linear area of the working gap of the position sensor.

Also, the above-mentioned recesses and inclined chamfer can be filled insensitive for inductive limit switches and position transmitters material flush with the outer surface of the stem.

This mechanism manual drive may be in the form of a planetary gear in which the fixed gear and the driven pulley bearings mounted on the housing, and drove with satellites mounted on the outer surface of the screw, and in the Central hole of the driven pulley placed the sun gear with the possibility of axial movement together with the shaft, which is installed in the screw holes and the housing, the shaft provided with a gear ring identical with the crown of the sun gear, and a handle attached to it on the outside of the housing, and the distance between the toothed crowns of the shaft and the sun gear is larger than the width of the satellites.

In addition, the device for the precise setting of the limit switch off the lei can be made in the form prescribed on the front sleeve of the protective tube box, in which the openings of the end walls placed can be rotated and locked at least two parallel threaded rods, and in the bottom of the box made of at least two longitudinal guide groove, each limit switch is located in the corresponding groove and provided with a nut installed on the corresponding pin.

In addition, the key device antipoverty can be made in the form of longitudinal protrusions with faces, which is equipped with a rod, and the liner is placed in the hole of the front sleeve of the protective tube, which is equipped with pressure elements, in contact with outer side surfaces of the liner, the latter may be provided with supports rolling with the possibility of their interaction with the faces of the protrusion of the stem.

Figure 1 shows the section of the proposed electromechanism, figure 2 - section a-a in figure 1, figure 3 - a view B in figure 1, figure 4 - section b-b In figure 1, figure 5 - view of G in figure 1, figure 6 - section d-D in figure 1.

The proposed electromechanism (figure 1) includes a housing 1, on which is mounted an electric motor 2 and the screw 3 with the master and the slave pulleys 4 and 5, and a drive belt 6. In a protective tube 7, in the front of the sleeve 8 is placed a rod 9 with a power nut 10. On the front sleeve 8 made box 11, inside which, in the guide grooves 12 and 13 are inductive limit switches 4 and 15 (KB), respectively, and the hole 16, in which is placed an inductive position sensor 17 (PD) (2, 6). On the outer surface of the rod 9, opposite each KB 14 and 15, the recesses 18 and 19 with the inner edges 20 and 21 are displaced relative to each other in angular and axial direction, opposite the APS - longitudinal, inclined chamfer 22, and the axial displacement of the recesses 18 and 19 of the "L" is: L≥L1-L2where L1- maximum working stroke; L2- the maximum distance between the KB and the angle of longitudinal flats 22 "α" (2) is: α≤arctgl/L1where l is the linear area of the working gap of a blast furnace.

The recesses 18 and 19 and inclined chamfer 22 is filled with material 23 is flush with the outer surface of the rod 9 (Fig 1, 6).

On the housing 1 (Fig 3) there is fixed a gear wheel 24 and the driven pulley 5 on the bearings 25 of the planetary gear 26 and the pinion carrier 27 with satellites 28 mounted on the outer surface of the screw 3. In the Central hole 29 of the pulley 5 is placed a sun gear 30 with the possibility of axial movement relative to him together with the shaft 31, mounted in the screw hole 3 and the housing 1, the shaft 31 provided with a ring gear 32, the same with the crown of the sun gear 30, and the arm 33 mounted thereon with the outer side of the housing 1. Satellites 28 are in engagement with the stationary and the sunshine is electroplated wheels 24 and 30, and the axial distance between the gear rims 32 of the shaft 31 and the sun gear 30 is greater than width of 28 satellites, i.e. In>B1. Arm 33 is fixed on the housing 1 by a clamp 34.

On the front sleeve 8 of the protective tube 7 is installed box 35, within which, in the holes 36 and 37 of its end walls 38 and 39 placed at least two parallel threaded rods 40 and 41, each of which is equipped with a nozzle 42, the strap locking 43 with cover 44 (Fig 1, 4, 5). At the bottom of the box 35 is made of at least two guide slots 12 and 13 parallel to the studs. KB 14 and 15 are respectively in the grooves 12 and 13 and mounted on studs 40 and 41 through the nut 45. Above the slots and studs are guides for SQ.

In addition to the above-mentioned depressions and flats on the rod 9 is made protrusion 46 with faces 47 (6), covered by inner and outer side surfaces 48 and 49 of the liner 50 that is installed in the hole 51 of the front sleeve 8 which is provided with pressure elements (screws) 52 in contact with the outer side surfaces 49 of the liner 50. On the above surfaces are placed bearings 53, interacting with faces 47 of the rod 9.

Protective pipe 7 near the housing 1 a pivot bearing 54 for fixing electromechanism (figure 2).

Electromechanism works as follows.

Reversing the rotation of the shaft is of electrodevices 2 is transmitted through the pulleys 4 and 5 belt 6 on the sun wheel 30 of the planetary gear 26, then through satellites 28 and led 27 of the screw 3, when the nut 10 together with the rod 9 performs a reciprocating motion as the piston rod 9 is fixed against rotation. For translation work in manual mode, you must nominate the right shaft 31 with the arm 33 of the housing 1, the pre-pressing the clamp 34, while the sun wheel 30, moving together with the shaft 31, the first disengages from the 28 satellites, which then engages with a ring gear 32 of the shaft 31, as the distance between the sun wheel 30 and the crown 32 is greater than the width of 28 satellites. When turning the knobs 33 rotation through the shaft 31, satellites 28, drove 27 is transmitted to the screw 3, so this rotation is transmitted through the reduction that allows the arm 33 to receive the rod 9 large axial forces, and in case of inadvertent actuation of the electric motor 2 driven pulley 5 together with a sun wheel 30 is free to rotate relative to the shaft 31 without interfering with the manual work. After working in manual mode, the shaft 31 together with the wheel 30 and the handle 33 is translated into position and fixed by the clamp 34.

When the movement of the rod 9 KB react to the absence of metal hitting on them inner edges 20 and 21 of the recesses 18 and 19 respectively. To provide the desired maximum stroke "L1"with the greatest possible distance between KB 14 and 15 "L2"the length OK the and 11, the inner distance between the recesses 18 and 19 of the "L" should be: L≥L1-L2.

To configure the required stroke of the piston rod 9, which is typically less than the maximum, it is necessary to loosen the clamp strap 43, unfold the cover 44 and rotate the pin 40 or 41, as well as KB is fixed against rotation grooves 12 or 13 box 35, it will move with the nut 45, reducing the stroke of 9, each KB can be moved counter and independently from each other with the range of L2".

When the movement of the rod 9 is changed, the gap between the surface of the inclined flats 22 and sensitive part of the DP 17, when this signal is given, the value of which is proportional to the moving rod. The length of the flats 22 must be greater than "L1"and for the secure use of the linear area of the working gap of the DP, which is stated in his passport, requires compliance with the following conditions: α≤arctgl/L1where α - the angle of the flats 22; l is the linear area of the working gap of a blast furnace.

To ensure reliable stem seal 9 in the front sleeve 8 protective pipe 7 above the recesses 18 and 19 and inclined chamfer 22 is filled with material, for example plastic insert 23 or epoxy compound, in which KB and PD do not respond, flush with the outer surface of the rod 9.

When electromechanism rod 9 fixed otpravit rolling bearings 53 of the insert 50, while jacking screws 52 to increase the rigidity against bending his side surfaces 48 and 49, as well as an additional to the lift, eliminate backlash between the faces 47 of the lug 46 and the supports 53 within the elastic deformation of the body of the insert 50, as the presence of backlash leads to move (swing) the flats 22 and distortion of evidence PD, and the presence of linear guides 53 eliminates wear of the liner 50.

Thus, in the proposed electromechanism unlike the prototype provided the opportunity to work in manual mode, this causes a great effort on the rod, because the rotation of power screw from the handle is made through the gearbox and the manual drive mechanism is safe and extends the upper range of possible efforts.

Put the device settings KB and the introduction of DP allows you to extend the accuracy of the exhibition stroke modulation and determine its value by increasing the ease of configuration and maintaining the integrity of the structure.

In addition, the proposed electromechanism possible adjustment to eliminate backlash in the device antipoverty, excluded wear liner that expands the possibilities for its application in the exact mechanics.

In addition, the location entered KB devices and APS on the front sleeve allows you to install protective pipe, near hull, pivot bearing mounting that p is t possible electromechanism for rotary movement (swinging) of the working bodies of the units, because it requires its hinge installation.

Thus, the proposed electromechanism has a higher technological capabilities.

1. Linear Executive electromechanism, comprising a housing that contains the electric motor and the screw with the master and the slave pulleys and a drive belt, the protective tube with the front sleeve, which is placed with the possibility of longitudinal movement of the rod with the power nut supplied with inductive limit switches located in the window with the possibility of longitudinal displacement and device antipoverty shaft with key, which covers the liner having inner and outer side surfaces, characterized in that it is equipped with a manual drive mechanism mounted on the body side secondary pulley, the device fine tuning inductive limit switches and inductive position sensor, located on the front sleeve of the protective tube, in which their placement made in accordance with the window opening, with limit switches installed in parallel guides with independent from each other move, and on the outer surface of the rod, opposite each limit switch is made at least one recess with an offset from each other in angle and axis of the second direction, and opposite position sensor, longitudinal, inclined flats, and the amount of axial displacement of the recesses ' L ' is L≥L1-L2where L1- maximum working stroke; L2- the maximum longitudinal distance between the limit switches, and the angle of inclination of longitudinal flats "αis α<arctgl/L1where l is the linear area of the working gap of the position sensor.

2. Linear Executive electromechanism according to claim 1, characterized in that the above-mentioned recesses and inclined chamfer is filled insensitive for inductive limit switches and position transmitters material flush with the outer surface of the stem.

3. Linear Executive electromechanism according to claim 1, characterized in that the manual drive mechanism made in the form of a planetary gear in which the fixed gear and the driven pulley bearings mounted on the housing, and drove with satellites mounted on the outer surface of the screw, and in the Central hole of the driven pulley placed the sun gear with the possibility of axial movement together with the shaft, which is installed in the screw holes and the housing, the shaft provided with a gear ring identical with the crown of the sun gear, and a handle attached to it from the outside of the body, and R is sloanie between the toothed crowns shaft and the sun gear is larger than the width of satellites.

4. Linear Executive electromechanism according to claim 1, characterized in that the device for the precise setting of the limit switches is made in the form prescribed on the front sleeve of the protective tubes, boxes, in which the openings of the end walls placed can be rotated and locked at least two parallel threaded rods, and in the bottom of the box made of at least two longitudinal guide groove, each limit switch is located in the corresponding groove and provided with a nut installed on the corresponding pin.

5. Linear Executive electromechanism according to claim 1, wherein the key device antipoverty made in the form of longitudinal protrusions with faces, which is equipped with a rod, and the liner is placed in the hole of the front sleeve of the protective tube, which is equipped with pressure elements, in contact with outer side surfaces of the liner, the latter is provided with supports rolling with the possibility of their interaction with the faces of the protrusion of the stem.



 

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