Driving facility for sprockets of chain drives
SUBSTANCE: invention refers to driving facility for sprockets of chain drives, particularly to drive of scraper-chain transporters or chain plane knives for underground mine developments. Drive incorporates the asynchronous electric engine and a gear box. Also the asynchronous electric engine consists of an engine with feeding from a frequency converter, while there is an intermediary two-speed sprocket gear box in the driving block between an engine shaft and the gear box; the intermediary gear box is designed in particular as the front gear box with one starting and one normal stage, when by means of the latter starting effect in the starting stage can be achieved, which is required for starting of loaded scraper-chain conveyer or for free pulling of the chain plane knife.
EFFECT: regulating rotary speed and torque of asynchronous electrical engines.
22 cl, 3 dwg
The invention relates to a drive device for a sprocket chain drives, in particular for the drive of the scraper-chain conveyor or plow units with chain drive for the underground mining, with a drive unit consisting of motor and transmission mechanism, and the transfer is completed as transfer compensation overload and load balancing, and to compensate for the overload has switchable multi-plate clutch, by which the flow of power between the induction motor and the sprocket can be broken.
Drive unit of the above type is known, for example, from the publications DE 4024830 A1 or DE 4316798 C2. In known chain drives are used unregulated induction motors three-phase current. Optional plug transfer mechanisms compensated overload and load balancing in the devices of the drive by setting the multi-plate clutch is achieved by balancing between the main drive and auxiliary drive of a coal plough or scraper-chain conveyor, to optimize the performance of a coal plough or scraper-chain conveyor and to avoid adverse load conditions on the chain. In the drive device according to DE 4024830 A1 to transmit compensated overload the load balancing added support engine, which in a simple induction motor can be connected and disconnected in order to tighten the chain. At the same time for chain tension at the joint drive between the motor and the transmission mechanism with overload compensation and load balancing is provided by a blocking device that blocks off an asynchronous motor against rotation.
Instead unregulated induction motors three-phase current, it was suggested that induction motors by switching the number of poles (DE 3741762 A1) and induction motors three-phase current, computer-controlled (DE 19735022 A1)such that for each engine in the attached computer to remember the individual curve of the ratio of torque and speed. By a sensor of angular movement when the engine continuously with the potential outcome is determined by its current speed to control the engine by comparing the instantaneous values of speed with an individual value of the number of revolutions corresponding to the stored curve. Based on this proportionality between the number of revolutions and torque of the corresponding asynchronous motor three-phase current can be, in addition, is also output steep is the overall point.
In underground mining strive to apply as electric actuators also three-phase motors with a frequency Converter, a so-called engine-powered inverters. The motors are powered by inverters enables continuous adjustment of the speed. Harsh underground environment with dust, humidity and corrosion, and statically set the compound engine powered inverters and transmission alignment overload pose a problem for the application of engines powered by frequency converters, which to date has prevented wide application engines with power from frequency converters. It is a single use motors with a frequency Converter, in which between the friction clutch and the motor with a frequency Converter inserted intermediate torsion-elastic and strong at the breakdown of a Cam clutch, the clutch Chan. Because the intermediate clutch increases the space required for actuators in an underground pit, so that appropriately designed device actuator may only be used when sufficient free space in the underground mine. In addition,when using motors with power from the inverters in the chain drives have significant difficulties in achieving the effect of start, required to run the loaded scraper-chain conveyor or to retrieve the plane, stuck in the pit.
The objective of the invention is to provide a drive device for a sprocket chain drives, in which you can regulate the speed and torque of induction motors and which can be carried out to the desired starting effect on the sprocket and thus the chain.
This task according to the invention is solved in that an induction motor consists of a motor powered by a frequency Converter, and the drive unit between the motor shaft and gearbox mounted intermediate two-speed cog gear with a starting level of inclusion and normal level of inclusion. Thanks intermediate two-speed cog gearbox can be taken full advantage of the engine power from the frequency Converter in the underground power transmission devices, and at the same time becomes possible by switching the normal level of inclusion in the starting stage include disproportionately increase torque for starting effects. Another advantage of cog gearbox with two speed transmission is that you can do without the device for tensioning the chain, which usually according to the level of those who Nicki was put in action supporting the motors or other devices.
In a preferred version of cog gearbox is designed as a front gear box, so that it is intermediate between the engine power from the frequency Converter and a transmission mechanism with overload compensation. In the most preferred version of cog gearbox has as starting stage include reversionary increases the gear ratio is preferably from 1:3 to 1:4, so that in the starting stage turn on output torque of the actuator corresponds to approximately three to four times the nominal torque.
Next, cog gearbox or front gear box preferably has one leading Central wheel mounted on the drive shaft for rotation, and one slave Central wheel mounted on the drive shaft for rotation, between which there is no possibility of turning mobile gear connected to the drive shaft, and a movable gear using the switching mechanism can optionally be linked without the possibility of turning with a master or slave Central wheel. To facilitate the switching of a transmission preferably both Central wheel and a movable gear are coaxial to each other and adjacent the Rog other section of the gearing with the same teeth. In this case, the switching mechanism may consist, in particular, from one switching hub, sliding sections of the teeth of two adjacent toothed wheels of the front gear box. In the preferred implementation, this switching hub can be moved by means of a switching fork, which can move parallel to the axis of the shaft of the gearbox via a switching terminal. Gear transmission may in particular be made so that the actuation of the switching mechanism and thereby change the degree of inclusion can also occur under load.
It is advisable shaft of the gearbox to install the bearings on the output side on the gearbox housing, and the drive he leans over the drive sprocket, which is installed rotatably in the housing of the transmission. Especially preferred if the Overdrive gear for starting the step of enabling includes a gear shaft mounted rotatably on the gearbox housing, which has a first crown gear, which is in toothed engagement with the leading Central wheel and the second gear being in toothed engagement with the slave Central wheel. At least, the first gear may be part of the independent wheels, svjazanno is no possibility of turning with the gear shaft, to facilitate mounting of the switching gear and the outer shaft. Cog gearbox or front transmission expediently designed as a cylindrical gear. Particularly favorable, if the host Central wheel is designed as a sleeve and/or provided on the inner side shell connection to the motor shaft. Through this performance, the radial displacement of the shaft of the motor with power from the frequency Converter can be eliminated. The engine power from the frequency Converter and the gear transmission can also be placed in a common housing, with the Central toothed wheel side actuator mounted on the motor shaft, or is part of the motor shaft, so that in this case can be saved additional bearings.
In order to minimize required for underground chain drive structural volume and improve statically set the connection of the motor with power from the frequency Converter to the cog gearbox, the engine power from the frequency Converter, which is provided with a motor housing, a stator with a stator winding, a rotor and a diagram of the frequency Converter, preferably a motor shaft, a rotatable rotor mounted side LAF the CA of the engine and back on the motor housing, designed as a hollow shaft, in an axial drilled hole which passes a torsion rod which is kinematically connected to it only on the rear end of the hollow shaft.
In a preferred version of the engine power from the frequency Converter according to the invention the torsion rod without contact passes through the axial drilled hole and/or the motor housing from the motor flange, i.e. the torsion rod on the hollow shaft from the engine introduces no bearing and additional support. These measures can be achieved without an intermediate flexible coupling statically specified clutch between the engine and also includes a driving device, even when due to technological inaccuracies or Assembly inaccuracies't correct alignment of the motor shaft and the input shaft is additionally connected to the drive device. For coupling drive between the engine and connected additional device actuator is particularly favorable, if the torsion rod can be inserted into the hollow shaft with its rear end and pass the hollow shaft through.
It is advisable to end of the torsion rod side flange of the engine to supply pinion, ring gear or coupling shaft, the outer diameter is R which is less than the minimum inner diameter of the axial drilled holes to allow the passage of a torsion rod from the rear, always available during Assembly of the engine end of the hollow shaft. The rear end of torsional rod is expedient to provide the pinion, means connecting the hub or teeth of the connection hub, the external diameter of which is larger than the end of the torsion rod from the motor flange and the inner diameter of the axial drilled hole.
As an additional guarantee for the engine used in underground mining, it is recommended that the rear end of the torsion rod to form a desired location, destruction and install the mounting tool to aid in the Assembly/disassembly of a torsion rod between the specified place of destruction and the end of the hollow shaft from the motor flange, so that even after the breaking of the torsion rod in a predetermined place of destruction you can spend the dismantling of all parts of the torsion rod without the necessity of disconnecting the motor from its flange from the additionally connected to the drive device. The fastening means may include, in particular, axial threaded hole in the end of the torsion rod.
For motors with power from the frequency Converter preferably, in particular when the circuit is reobrazovateli frequency built-in engine power from the frequency Converter, and in particular, it is established in the gearbox, integrated into the motor housing. In one preferred execution of the torsion stem protrudes outward from the housing of the motor end-side flange of the motor or pinion from the motor flange. The end of the torsion rod side flange of the engine can then be statically definitely connected with the input shaft cog gearbox or front of the transmission. Clutch motor with two-speed cog transmission is possible without a substantial increase in the required installation space for the chain drive easy to provide the torque necessary to achieve the trigger effect, the fact that cog gearbox or front transmission is included in the starting stage switch.
Other advantages and methods of execution of the invention made it clear from the following description of one example of execution shown schematically in the drawing. In the drawing:
figure 1 shows in a simplified schematic form of underground mining device with two chain drives motors are powered by inverters;
figure 2 is a front view in section of the engine power from the frequency Converter, connected to the front gearbox; and
figure 3 - chart torque is omenta engine developed by the motor with power from the frequency Converter and the front gearbox.
Figure 1 shows two marked together POS, the chain drive for driving one revolving around the two sprockets 1 chain drive 50 of the endless chain 2, which in the case of a scraper-chain conveyor, designed as a face conveyor or collecting conveyor consists of a belt scraper conveyor, and in the case plow plow is a chain, which moves along not shown coal plow to Oistamo face. Sprocket 1 are used to rotate the chain 2 and are driven respectively by using drive units with which they are associated without the possibility of turning over the shaft 3 stars. Drive units of both chain drives 50 contain three-phase asynchronous electric motor, designed as the engine 10 with power from the frequency Converter, with a built-in box 11 speed for the circuit of the frequency Converter and the motor 10 is connected to the transmission 4 with overload protection and compensation of load connection intermediate the front of the box 30 of the transmission. Transmission 4 with overload protection and load balancing is performed, in particular, as a planetary gear with two planetary stages, and to a hollow wheel of one of the planetary stages attached is ugrozhaema hydraulic multi-disc clutch, to get unloaded start all motors 10, to be able to equalize the load between the two drive units 50, and in the case lock circuit 2 to disconnect the driving connection between the engine 10 and the sprocket 1. The design and method of functioning of the respective transmission overload protection and load balancing are known, for example, from the patent DE 4316798 A1.
Figure 2 shows a longitudinal section of the engine 10 with power from the frequency Converter and the front of the box 30 of the transmission. The engine 10 with power from the frequency Converter has a motor housing 12 with a built-in box 11 of speeds (1) for the circuit of the frequency Converter. In the internal volume of the housing 12 of the electric motor is the stator 13 and a coil 14 of the stator, and the inner perimeter of the stator 13 with a certain air gap is installed, the rotor 15 of the motor 10 with power from the frequency Converter, which is connected without turning the motor shaft, designed as a hollow shaft 16. The basic design three-phase asynchronous motor is designed as a motor powered by a frequency Converter, a specialist known, so there is not a more detailed description of the principle of operation of the engine 10 with power from the frequency Converter. The hollow shaft 16 on the rear end 17, and a hundred the ons flange 18 of the electric motor, respectively, by bearings 19, 20 is mounted for rotation on the rear cover 21 and the flange plate 22 of the engine and has a longitudinal drilled hole 23, which is equipped with a torsion rod 24 which passes through the longitudinal drilled hole 23 through and at the end 18 of the hollow shaft 16 from the side of the motor flange protrudes from the longitudinal drilled holes 23 and the housing of the electric motor 12 pinion 25 of the actuator. On the rear end of the torsion rod 24 has another leading gear 26, which is fitted with a suitable ring gear and is in mesh with no possibility of turning with the response gear thread 27 on the inner perimeter of the rear end 17 of the hollow shaft. Between the response jagged cuts 27 and the pinion 26 of the torsion rod 24 can be formed of a transition clearance to facilitate mounting of the torsion rod 24 through the closed shut-off lid 28 hole in the rear cover 21 of the housing of the electric motor 12. The outer diameter of the pinion 25 is preferably slightly less, and the outer diameter of the pinion 26 is slightly greater than the inner diameter of Diaxial drilled holes 23. In the area of the pinion 26 on the torsion rod 24 with the groove of the shift of the formed desired location 29 of destruction, and a threaded hole 8 located on the axis of A torso of the ment of the rod 24, passes through a specified place 29 destruction out towards the leading of the drive gear 25 of the torsion rod 24 with the drive, so even if it is broken torsion rod 24 in the area of the specified designated 29 destruction removal tool (not shown) is screwed into the threaded hole 8, and the torsion rod 24 may be removed from the axial drilled holes 23. Since the torsion rod 24 is connected to the hollow shaft 16 only at its rear end 17 and is fixed relative to the hollow shaft 16, the misalignment between the body 12 of the engine 10 with power from the frequency Converter or the axis A of the hollow shaft 16 and the housing 31 of the front of the box 30 of the transmission, or the transmission axis G of the front of the box 30 of the transmission can be corrected. Therefore, you do not want between the engine 10 with power from the frequency Converter and the front frame 30 of the intermediate gear connected coupling, in particular a torsion-elastic Cam clutch.
In the example of execution of the front box 30 gear is designed as a two-speed gear transmission, and switching between the starting level and the normal level is made by means of a switching sleeve or connection with bore 32. In the context of figure 2 shows connection with bore 32 in the lower half in the on position for starting stage is pereklucheniya, and in the upper half is in the on position for normal-speed switching, as it will be more clarified.
Performed as a return gear two-speed cog box 33 transmission front box 30 gear has a shaft 34 of the transmission that is installed on the output side through the bearing 35 in the base plate 36, which is located on the output side. The shaft 34 of the transmission passes to the engine 10 with power from the frequency Converter to approximately pinion 25 of the torsion rod 24, and between the pinion 25 and the shaft 34 of the transmission there is a backlash. At the end of the shaft 34 of the transmission from the engine are located on the drive side of the Central wheel 37 cog box 33 transmission, which is here designed as a clutch, and the Central area of the wheel 37, provided with gear teeth, a cutting 39, is mounted through a bearing 40 for rotation at the free end of the shaft 34 of the transmission. Central wheel 37 in comparison with the plot, which has a cylindrical gear cutting 39, narrowing to section 41 of the connection, which is provided on the inner perimeter of the teeth 42 and the hub may be coupled or connected without turning with the pinion 25 of the torsion rod 24. Section 41 of the connection is on the outer perimeter of the cylindrical belt 43 which by means of a bearing 44 mounted on the engine side on the support plate 45, which is an integrated part of the housing 31 of the transmission. Offset along the axis of the shaft 34 of the transmission on both base plates 36, 45 is mounted for rotation of the outer shaft 46, and the outer shaft 46 has a Cam 47 with gear 48 engages, and a section of the shaft, on which is installed without turning, for example, through the keyed connection of the separate wheel 49 with the gear clutch 51. As a further component parts of cog box 33 has a switchable transmission wheel 52 with a cylindrical gear cutting 53 associated with the shaft 34 of the transmission without the possibility of turning and located on the output side of the Central wheel 54 with a cylindrical gear cutting 55, which rests with the free rotation on the shaft 34 is passed through the bearing 56.
In normal-speed switching, in which connection with bore 32, movable through the shaft 57 management and rigidly associated with him plug 58 switch, connects the site toothed gear cutting 53 switchable wheel 52 with a plot ratio of gear slicing 39 located on the side of the Central drive wheel 37 rotates the toggle wheel 52 and thereby the shaft 34 of the transmission with the same number of turns as the shaft with torsion rod 24 connected to the Central wheel 37. This state is mounted connection 32 matches so normal-speed switching box 33 gear with a transmission ratio of 1:1.
Cog gear driven members in engagement with each other by cylindrical teeth or gear teeth, cuts 39, 51, 48 and 55 gears and respectively leading gears 37, 49, 47 and 54, is shown in the example of execution in the starting step of switching the gear ratio in the slow 1:4. Starting level switch is active only when the connection with bore 32, as shown in the lower half of figure 2 is in the left position in the emphasis on the flange 59 of the Central wheel 54 with the output side. In this position the connection with bore 32 overlaps simultaneously plot the gear teeth, slicing 53 switchable wheel 52 and is provided with teeth section 60 located on the discharge side of the Central wheel 54, which is made on the cuff 61 Central wheel 54, which runs in the direction of the electric motor 10. This provision is mounted connection 32 and engages the toothed sections 60 and 53 will act so that the number of revolutions of the Central wheel 54 is transferred to a switching wheel 52 and thereby to the shaft 34 of the transmission. In turn, as above already described, in the normal-speed switching connection with bore 32 is in toothed engagement with the gear teeth of gear slicing 39 Central wheel 37 on the drive side, and with the teeth of a participant is 53 switchable wheel 52, so that the transmission shaft rotates at the same speed that the torsion rod 24 of the engine 10 with power from the frequency Converter.
Starting level switch driven two-speed gear transmission is enabled only when using the engine 10 with power from the frequency Converter and the chain drive 50 must be received trigger the effect to start the loaded scraper-chain conveyor or for free pulling a plow. At the starting stage of the switch, as schematically explains the diagram in figure 3, due to the combination of the engine 10 with power from the frequency Converter and cog gear box 33 and accordingly the front of the box 30 assists emerging from the side of the drive torque Mdthe engine is increased until the torque MdAhill start assist, which here corresponds to approximately four times the rated torque MdNengine. Starting level switch can be activated at a lower rotational speed n or lower speeds chain vk.
The invention is not limited to the examples presented performance. The use of engine power from the frequency Converter with hollow shaft and the torsion rod is the preferred implementation of the invention. Gear ratio is the engine and the engine power from the frequency Converter can also be placed in a common housing, and then the Central wheel with the drive side can be the same with the motor shaft, and from one of the two bearings 20, 44 can be waived. In this version, of course, is also not necessary that the motor shaft was made as a hollow shaft with a torsion rod.
1. Drive unit for a sprocket chain drives, including drives the scraper-chain conveyors or chain planes for the underground mining, with a drive unit composed of the induction motor and gearbox, and the gearbox is designed as a gear with overload protection, and to compensate for the overload has a switchable multi-disc clutch for tearing of the power flow between the motor and the sprocket, wherein the induction motor consists of a motor (10) with power from the frequency Converter, and the drive unit between the motor shaft and a transmission (4) has an intermediate two-speed cog-box (33) gear with one trigger level switch and one normal step switch.
2. Drive unit according to claim 1, characterized in that a two-speed cog-box (33) gear is designed as a gear box or the front (30) transmission.
3. Drive unit according to claim 1 or 2, is great for the different themes, as a starting-stage switch provides a return gear with a transmission ratio of preferably from 1:3 to 1:4.
4. Drive unit according to claim 1, characterized in that the cog box or front gear box has a Central gear wheel (37)mounted rotatably on the shaft (34) of the transmission on the drive side and the Central gear wheel (54)is mounted rotatably on the shaft of the transmission on the output side, between which there is no possibility of turning associated with the shaft (34) of the switchable transmission wheel (52), and a switching wheel (52) by means of a switching device (32, 57, 58) can be engaged with the Central gear wheel (37, 54) or drive side or the output side.
5. Drive unit according to claim 4, characterized in that the two Central wheels (37, 54) and a switching wheel (52), coaxially with each other and adjacent to each other, have jagged plot gearing (53, 39, 60) with the same teeth.
6. Drive unit according to claim 4, characterized in that the switching device consists of a shell connection (32), sliding gear sections (53, 39; 53, 60) three adjacent gears (37; 52; 54) cog box (33) transmission.
7. Drive unit according to claim 6, characterized in that nasaan the e connection (32) is arranged to move through the switching fork (58), which is shifted parallel to the axis (G) of the transmission shaft by a rod (57) switch.
8. Drive unit according to claim 4, characterized in that the shaft (34) of the transmission is installed on the output side on the housing (36) transmission, and the drive is backed through the Central wheel (37), which is installed on the drive side on the housing (31) of the gearbox for rotation.
9. Drive unit according to claim 4, characterized in that the cog box (33) gear for starting stage switch includes an outer shaft (46)mounted rotatably on the housing (31; 36) transmission and having a first toothed gear cutting (51), which is in toothed engagement with the Central wheel (37) drive side, and the second transmission gear cutting (48), which is in toothed engagement with the Central wheel (54) on the output side.
10. Drive unit according to claim 9, characterized in that at least the first transmission gear cutting (51) is an integral part of the individual wheels (49)connected to the outer shaft (46) without turning.
11. Drive unit according to claim 2, characterized in that the gear transmission (33) is designed as a cylindrical gear.
12. Drive unit according to claim 4, characterized in that the Central wheel (37) article the Rhone drive is designed as a clutch and/or provided with internally mounted connection for the motor shaft.
13. Drive unit according to claim 2, characterized in that the motor (10) with power from the frequency Converter and cog gear (33) are located in a common housing, preferably the Central wheel with the drive installed on the motor shaft.
14. Drive unit according to claim 1, characterized in that the engine power from the frequency Converter is made with the body (12) of the electric motor, the stator (13) winding (14) of the stator, the rotor (15), the circuit of the frequency Converter and the rotating rotor (15) to the motor shaft, which from the side of the motor flange and the rear is installed on the housing (12, 21, 22) of the electric motor and is designed as a hollow shaft (16)through an axial drilled hole (23) which is torsion rod (24)that movably connected only to the back end (17) of the hollow shaft (16).
15. Drive device according to 14, characterized in that the torsion rod (24) is not touching, through axial drilled hole (23) and/or the housing (22,12) motor side flange of the engine.
16. Drive device according to 14, characterized in that the torsion rod (24) can be inserted in the hollow shaft (16) from the rear end (17) and can move through it.
17. Drive device according to 14, characterized in that the end of the torsion rod (24) from the engine is equipped with leading gear is (25), teeth or friction connection, outer diameter which is smaller than the minimum inner diameter (Di) axial drilled holes (23).
18. Drive device according to 17, characterized in that the rear end of the torsion rod (24) is provided with a pinion (26), means mounted connection or teeth mounted connection, the external diameter of which is larger than the end of the torsion rod (24) from the motor flange and the inner diameter (Di) axial drilled holes (23).
19. Drive device according to 14, characterized in that on the back end (17) of a torsion rod (24) performed a specified place (29) destruction, and between the specified place (29) destruction and the end side of the motor flange to aid during Assembly/dismantling of the torsion rod (24) is installed, the fastening means.
20. Drive device according to claim 19, characterized in that the fastening means includes an axial threaded hole (8) at the end of a torsion rod (24).
21. Drive device according to 14, characterized in that the circuit of the frequency Converter is installed in a box (11) speeds, built-in housing (12) of the motor.
22. Drive device according to 14, characterized in that the torsion rod (24) end (25) from motor flange protrudes outward from the housing (12, 22) of the electric motor.
FIELD: electric engineering, mechanical engineering, possible use in drives of automatic control systems of aircrafts, robotic systems, antenna systems and other electro-mechanical power systems where mass and dimensions are of high importance.
SUBSTANCE: in the mini-actuator, which consists of electric motor, two-stepped wave transmission, stopper device, electric motor rotor position sensor, output shaft position sensor, body and supporting device, which are made concentrically and along the central axis of the mini-actuator, in accordance to the invention, the output shaft of the mini-actuator with rigid wheel (13) of output step of wave transmission is made in form of hollow cylinder (14) with end lid (15), upon which elements for attachment to object of control are positioned. The output shaft (13) is supported by solids of revolution, positioned on both sides of the electric motor. The solids of revolution (26), positioned on the side of end lid (15), constitute a radial bearing, and on the opposite side - act as solids of revolution (12) for the output step of the wave transmission. Solids of revolution are positioned on diameters which are close to external diameter of stator (1) of electric motor. Inside the radial bearing, formed by solids of revolution (26), the stopper device is positioned. Between the stopper device and the electric motor, the electric motor rotor position sensor is positioned. Also, on the side of output step of the wave transmission, output shaft position sensor is positioned in such a way, that its stator (18) is attached to separator (11), and rotor (19) is attached to outer side of the rigid wheel (13) of the output step of the wave transmission.
EFFECT: ensured capacity for use in broad range of bending momentums influencing the output shaft, small size, expanded functional capabilities.
FIELD: ground and space navigation, machine building, transport, petrogas industries.
SUBSTANCE: invention relates to geared motors and electric drives and it can be used in precision drives of robots and manipulators. Proposed electric drive with reduction gear contains electric motor with magnetoconducting rotor, reduction gear secured on electric motor shaft and transmitting rotation to output shaft through bearings of reduction gear. Magneto conducting rotor is provided with round screw concave slots along inner cylindrical periphery and it is in constant meshing with magnetoconduction wheel made in form of spring providing its connection into closed construction in form of torus by welding or soldering or by simple mechanical connector, or open one. Round screw concave slots of magnetoconducting rotor follow convex profile of coils of spring wheel. Rotation of rotor with considerable effort is converter into complex motion of spring wheel, longitudinal movement along axis of rotor and simultaneous rotation of spring wheel around axis of rotor.
EFFECT: improved technical and economic parameters of electric drive.
10 cl, 8 dwg
FIELD: electric engineering and electro-mechanical engineering, in particular, electric machines, particularly concerns features of structural realization of planetary electric motor - reducer.
SUBSTANCE: planetary electric motor - reducer contains body, positioned wherein are toothed gear wheel of planetary reducer and gear of planetary reducer, stator and rotor of electric motor, mounted eccentrically and connected to planetary reducer. In accordance to invention, in aforementioned device toothed gear wheel of first step of planetary reducer performs function of stator of electric motor, while gear of planetary reducer realizes function of satellite-anchor of electric engine, mounted on which is end collector with current-feeding and current-draining contacts, while end collector may move eccentrically relatively to body, toothed gear wheel - stator of electric motor has electromagnet coil and is made with internal engagement teeth, engaged with teeth of gear of satellite-anchor, having coils of other electromagnet, while teeth of internal engagement of gear of satellite-anchor are in contact with teeth of spindle, while aforementioned toothed gear wheel - stator of electric motor and gear of satellite-anchor of electric motor have grooves, positioned in which are coils of appropriate electric magnets, feeding of current into which creates torque and causes shift of satellite-anchor relatively to point of greatest mutual engagement of its teeth and teeth of toothed gear wheel - stator of electric motor, or relatively to contact point of friction couple formed by them.
EFFECT: improved mass-dimensional characteristics of planetary electric motor - reducer by means of combination of electric motor and planetary reducer in one structural unit.
4 cl, 6 dwg
FIELD: electrical engineering; motor physical coupling with gear transmission.
SUBSTANCE: proposed motor 1 that can be used to drive air duct shutter in motor-car weather unit has cup-shaped frame 3 and disk-type rotor with commutator 4. Disk-type rotor is installed in frame 3 on sleeve 12 rigidly joined on one end with frame bottom 13. Rotor sleeve 11 is elongated so that butt-end of its first edge 14 is adjacent to frame bottom 12 and second edge 15 of sleeve 11 mounts gear wheel 16 which can be press-fitted thereon. Rotor commutator 4 is secured through its base 17 on outer cylindrical surface of sleeve 11 and rotor disk 6 carrying winding 18 is disposed on commutator 4. Motor frame 3 may be joined with gear transmission casing 21 on second edge 15 of rotor sleeve 11 so that gear wheel 15 mounted on sleeve 11 occurs within casing 21 and is brought in mesh with respective member of gear transmission 2. Output shaft 25 of gear transmission 2 is set in position affording its coupling, for instance, with shaft 26 of weather unit air duct shutter 27. Output shaft 25 of gear transmission 2 and shaft 26 of shutter 27 may be coupled through arm 28 of sensor 29 that generates signal indicating angular position of output shaft 25 or shaft 26 of shutter 27.
EFFECT: enhanced operating stability and maintainability of gear motor.
7 cl, 4 dwg
FIELD: electrical engineering and machine building, applicable in the drives of automatic control systems, robotics, high-precision and power mechanisms with hydraulic and electric motors.
SUBSTANCE: the power minidrive with a hydraulic motor has a wave regulator, hydraulic motor, power bearing and a body. The wave regulator has a rigid wheel made as a single component with the outer race of the power bearing, roller used as rollers of the power bearing, multirow separator made as a single component with the separator of the power bearing, wavemaker, representing rigid rings made as a single component with the inner race of the power bearing. The hydraulic motor has a stator in the form of a cylinder block with plungers, control motor, distribution device, working medium feed and drainage connections, connecting ducts, and a rotor representing rigid rings. The body is formed by a cover and a multirow separator of the wavemaker. According to the second modification, the power minidrive is made with an electric motor.
EFFECT: reduced overall dimensions.
2 cl, 4 dwg
FIELD: electromechanical engineering.
SUBSTANCE: proposed high-speed electrical machine has stator and rotor whose shaft journal is clamped by external rings of at least three bearings installed on eccentric axles coming in mesh with auxiliary-motor rotor. Free-running unit is introduced to prevent departure of mentioned parts from one another as they wear down that functions to control turn of auxiliary-motor rotor only in direction affording tightening of shaft journal bearings by external rings. Free-running unit that functions to reduce vibration and radial thrusts on bearings is made in the form of free-wheel clutch whose driven member is rigidly fixed on frame. Driving member is auxiliary-motor rotor. In the course of running rotor takes plays due to wear-down of contacting parts under action of torque.
EFFECT: enhanced reliability and enlarged service life of electrical machine.
2 cl, 2 dwg
FIELD: instrument industry.
SUBSTANCE: electric drive comprises first and second electric motors, planet gearings, and differential. Stators (5) and (6) of the electric motors are secured to housing (2) of the electric drive. Shaft (7) of rotor (3) of the first electric motor is mounted on base (1) and is connected with central pinion (16) of the differential through a clutch. Shaft (10) of rotor (4) of the second electric motor bears on shaft (7) of rotor (3) and is connected with the hollow central pinion (17) of the differential through a clutch. Central pinion (16) is mounted in the space of central pinion (17) and engages satellites (19). Satellites (19) engage satellites (21) in pair. Central pinion (16) is interposed between two spherical bearings (22) and (23). Carriers (20), (27), and (30) of the differential and first and second planet gearings are made in block with central pinions (25), (29), and (33) of the first, second, and third planet gearings, respectively. Satellites (26) and (32) engage common gearing wheel (34) which is secured to housing (2). Carrier (37) of the planet gearing is made in block with output shaft (40). First (42), second (43), and third (44) supports are interposed between central pinions (25), (29), and (33) and carriers (27), (30), and (37), respectively.
EFFECT: simplified manufacturing and assembling of the electric drive.
FIELD: electrical engineering; peculiarities in producing worm on motor shafts.
SUBSTANCE: novelty is that armature shaft worm whose outer diameter is greater than that of shaft is produced by plastic working of armature shaft by end of armature assembling from its separate parts.
EFFECT: reduced armature mass and size due to enhanced loading capacity of worm and use of small-diameter shaft.
7 cl, 2 dwg
SUBSTANCE: feeder for ore chute includes ferroconcrete frames 1 with hydraulic cylinders, compass roof 2 and operating element 3 with shape of arch of interior working part of compass roof 2 corresponds to shape of arch of emptying opening 5, while interior working part of compass roof 2 of operating element 3 are made with height calculated from expression: Hcr = Hco/Kcr [1- sin (arctg h/α1/2)], chord of compass roof 2 has width calculated from expression α = α - 2·L3·Kk·tg45°-p/2. The operating element 3 is equipped with extended platform 4 of width equal to the width of the operating element 3 and of length equal to the length of ferroconcrete frame 1 without the compass roof of the feeder 2.
EFFECT: increased efficiency of development of mineral deposits, reduced losses dilution.
SUBSTANCE: invention relates to joint element for jointing the chute section of the chain scraper or for the mining machine guide sections, particularly, for the grader guide, incorporating two heads made integral by means of the rod narrowing along the width. Every head side facing the rod is furnished with bulged-round shoulders inclined towards the rod. The invention proposes also the open-side pockets arranged on the chute sections to house to aforesaid joint element.
EFFECT: possibility of transmitting high axial loads at high angular mobility and simpler assembly of jointing elements.
19 cl, 5 dwg
FIELD: mining; transportation.
SUBSTANCE: tunnel miner includes crawler-tracked carriages, drilling effector, berm cutters, cut-out drums, warding four-section shield with boards and buckets attached to the said sections, chute-like conveyor with walls, control panel of hydraulic system, miner's electric equipment control station, and operator's seat. The miner incorporates two dust-screening flaps mounted pivotally, by means of curtains, on the chute-like conveyor walls at an angle to the vertical. The dust-screening flaps at the operator's seat side feature locking device with arms capable of shifting towards only one direction to reach the stops installed in one flap, and thus to free the adjoining flap.
EFFECT: reduced dust level of the operator's workplace during miner operation.
FIELD: mining industry; face and drift conveyors.
SUBSTANCE: proposed section contains lower run 2 and upper run 3 for driving chain scrapers, welded frame structure 1 with interconnected sides, transport bottom 8 and connecting appliances 60. according to invention, sides consists of mirror turned-over solid rolled sections 10 of asymmetric form constant along length of section. Sections 10 are turned outwards and they include lower and upper shelves and raised intermediate shelf connecting lower and upper shelves and provided with bend on which at least one step is made from inner side to support and weld-to at least one intermediate sheet 40A reinforcing rolled sections 10. Transport bottom 8 is welded to two rolled side sections 5 to form replaceable tray 4.
EFFECT: simplified design owing to reduction of number of components, and facilitated manufacture owing to automatic mounting and welding operations.
26 cl, 7 dwg
FIELD: mining industry.
SUBSTANCE: proposed member includes slats with connecting elements secured on running rollers and round-link chain. Connecting elements are made in form of two guide slats, fastening, fastening pin and yoke enclosing horizontal links of chain, and ends of vertical links are located between guide slats.
EFFECT: reduced metal usage for manufacture of connecting elements, reduced time taken for mounting and demounting, simplified design of traction-and-carrying member of slatband conveyor.
FIELD: mechanical engineering; conveyors.
SUBSTANCE: invention relates to conveyors with multichain traction member. Proposed scraper conveyor contains endless traction member consisting of parallel traction chains, two outer chains and one inner chain, closed in vertical plane on end sprockets and resting on guides of panline flight. It is provided with scrapers secured in turn by ends on outer chains, alternating with scrapers freely fitted with clearances between outer chains and attached by ends on inner chain. Scrappers secured on outer chains are provided with cavities for accommodating inner chain. Traction member is furnished with additional inner chain, both inner chains being arranged in middle part of panline flight symmetrically to each other relative to longitudinal axis of conveyor, and scrapers being secured by ends on both inner chains. Distance between outer and inner chains is set less than distance between inner chains.
EFFECT: increased length of flight owing to increased summary breaking force of traction member chains.
FIELD: mining industry; mine plants.
SUBSTANCE: invention is designed for selective transportation of mineral resources. Proposed conveyor contains rigidly mounted on buntons chute-like section guide conductors with curvilinear sections, articulated members with two load-carrying units freely suspended from axles and arranged symmetrically on each member and provided with gear wheels for selective transportation of load, and guide rolling supports on axles of members for engagement with said guide conductors. Rolling elements of rolling supports are made in form of balls. Conveyor is furnished also with distributed linear hydraulic drive. Guide rolling supports are provided with metal journals with rectangular seats on free places of which detachable inserts are installed accommodating said rolling elements in form of balls. Detachable inserts are installed for corrective displacement by means of pressure spring to adjust distance between guide rolling supports and inner surfaces of chute-like section guide conductors.
EFFECT: provision of reliable operation of conveyor.
FIELD: mining industry; transport facilities.
SUBSTANCE: invention can be used for transportation of rock under ground, particularly, for reloading of rock from one conveyor to the other arranged at one level. For this purpose loose material reloading device is used which contains inclined and horizontal sections with drive arranged on support between two conveyors. Device is installed in housing with windows from side of conveyors, and is made in form of chain with scrapers passed over rollers and installed for moving in pair of trapezoidal guides. Housing is installed on support by means of hydraulic jacks. Angle of tilting α of side of trapezium is within 35° and 45°.
EFFECT: simple design, provision of effective and safe reloading of rock from one conveyor to the other arranged at one level.
FIELD: mining industry.
SUBSTANCE: invention relates to vibrating facilities and it can be used for letting out ore or other materials and their separation. Proposed vibrating feeder has resilient supports, working member consisting of charging and discharge parts and vibrating drive consisting of two shafts with unbalance weight and motors, one per each unbalance weight. Place of arrangement of vibrating drive is determined basing on the fact that line of connection of axles of unbalance weights is located in area limited by two straight lines square to direction of vibration, one of which passed through center of mass, and the other is located at a distance from center of mass of 1/10L to side of charging part of working member. Axle of unbalance weights are located at different sides from line of direction of vibration passing through center of mass at distance equal to not less than 1/8 where L is distance between resilient supports in horizontal direction.
EFFECT: improved stability of operation of vibrating feeder at unstable supply and impact loads on working member at discharging.
FIELD: mining industry.
SUBSTANCE: invention can be used for transportation of rock in underground mines for reloading of rock from one conveyor to the other installed at one level. For this purpose device is used containing pair of flight conveyors, forced-draught and suction fans, air chamber with air inlet hole provided with cyclone installed over flight conveyor to be loaded. Air chamber is arranged between conveyors and is furnished with air collector made in form of screen with cells, housing and brushes from side of conveyors. Additional hole is made in bottom of air chamber to deliver air jet at angle to direction of material movement.
EFFECT: device of simple design providing effective and safe reloading of rock from one conveyor to the other installed at one level.
SUBSTANCE: invention refers to mining, particularly to guide for plough with chain rod. The guide of the plough with chain rod consists of guiding sections which are made complex and designed to be connected between themselves by means of connecting elements providing high tensile strength and angular freedom. Also each guiding section of the plough has middle part with chain guiding channels arranged one above the other; corresponding end part is welded to each side of the middle part; this end part is made out of integral cast item with assembled one above the other sections of chain channels separated with cast-on antifriction distance element. The end sections are equipped with cast-on opened from the side of mining face pockets for connecting units which serve as connecting elements. Each end section has predominantly closed circular upper section of the chain channel where an upper section of the chain channel has conjugating projection at one of the two side parts, while an upper section of the chain channel of the other end section has responding indent.
EFFECT: increased service life of plough guide and economy of fabrication.
18 cl, 8 dwg