A high-speed servo motor with stator cooling

Abstract

The invention discloses a high-speed servo motor with stator cooling, which relates to the technical field of stator of servo motor, and comprises a motor body and a motor stator installed in the motor body, wherein a liquid cooler is installed on the top of the outer shell of the motor body, a cooling jacket is sleeved on the outer wall of the motor stator, a flow guide cavity is provided in the cooling jacket, a speed reduction cavity is provided in the reinforcing convex strip, a plurality of cooling strip cavities are provided on the peripheral side of the motor stator, and a guiding mechanism for supplying cold to the cooling strip cavities is provided in the installation cavity; the invention facilitates the liquid cooling and temperature reduction treatment of the motor stator with two different flow rates through the cooperation of the cooling jacket with the flow guide cavity, the cooling strip cavity and the guiding mechanism, can stably connect the motor stator and the cooling jacket, improve the connection strength between the two, and facilitate multiple speed reduction treatments of the cooling liquid from the flow guide cavity, thereby greatly improving the cooling effect on the motor stator, and thus effectively reducing the failure rate of the high-speed servo motor when in use.

Description

Technical Field

[0001] The invention relates to the technical field of stators of servo motors, and in particular to a high-speed servo motor with stator cooling. Background Art

[0002] The electric drive system is similar to the engine system of a fuel vehicle. The electric drive system converts the energy of the power battery into kinetic energy. While improving the power level of the electric drive system, the temperature rise of the motor is the most difficult problem to overcome. The current mainstream heat dissipation method is water cooling. Due to its straight tube arrangement heat dissipation method, it is impossible to directly cool the heat source on the stator, and the cooling area of ​​the motor stator is not uniform enough, resulting in the heat at the end of the motor winding to be transferred to the inner wall of the shell through the stator core, and then taken away through the water channel. The transfer path is long and the heat dissipation efficiency is low, and it is impossible to play the role of dual cooling of the motor stator by two flow rates of coolant. If a high flow rate coolant is used to cool the motor stator, the circulating coolant will not be completely cooled, affecting the cooling effect of the motor stator; resulting in an increase in the failure rate of the motor when in use; therefore, the above problems need to be improved. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a high-speed servo motor with stator cooling.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a high-speed servo motor with stator cooling, comprising a motor body and a motor stator installed inside the motor body, a liquid cooler is installed on the top of the outer shell of the motor body, a cooling jacket is sleeved on the outer wall of the motor stator, a plurality of reinforcing convex strips are longitudinally protruded on the peripheral side of the outer wall of the cooling jacket, a positioning hole is opened on the front end surface of the reinforcing convex strip, a positioning spiral tube is fixedly arranged inside the positioning hole, a plurality of snap-in strip grooves are equidistantly opened on the outer wall of the motor stator; a plurality of snap-in convex strips are equidistantly protruded on the inner ring wall of the cooling jacket, and the snap-in convex strips are snap-connected inside the snap-in strip grooves; a coil-shaped guide cavity is opened inside the cooling jacket along the length direction, and a plurality of speed reduction cavities connected with the guide cavity are longitudinally opened inside the reinforcing convex strip, The interior of the deceleration chamber 7 is divided into a plurality of flow-blocking chambers with the positioning hole as the center at four corners; a deceleration port is provided between the flow-blocking chambers at the inner and outer ends of the deceleration chamber, a liquid inlet pipe connected to the front end deceleration chamber is vertically provided at the front end of the outer wall of the reinforced convex strip on the top of the cooling jacket, and the outer end of the liquid inlet pipe is fixedly connected to the liquid outlet end of the liquid cooler; a liquid outlet pipe connected to the rear end deceleration chamber is vertically provided at the rear end of the outer wall of the reinforced convex strip on the top of the cooling jacket, and the outer end of the liquid outlet pipe is fixedly connected to the liquid return end of the liquid cooler; a plurality of cooling strip chambers are longitudinally provided on the circumferential side of the inside of the motor stator, and connecting holes connected to the card-joining strip grooves are provided on the front and rear ends of the outer walls of the cooling strip chambers, and installation chambers matching the connecting holes are provided inside the front and rear ends of the reinforced convex strips, and a guiding mechanism for supplying cold to the cooling strip chambers is provided inside the installation chamber.

[0005] Preferably, a V-shaped conveying cavity is opened in the middle of the outer end of the reinforcing convex strip, and through openings connected to the flow-blocking cavity are opened on the inner walls on both sides of the conveying cavity; guide openings connected to the flow-blocking cavity are opened on the inner walls on the upper parts of both sides of the installation cavity; the flow-blocking cavities on both sides of the bottom of the speed reduction cavity are connected to the guide cavity.

[0006] Preferably, the guiding mechanism includes a sealing block with a vertical dynamic seal arranged in the upper part of the installation cavity, a movable tube fixedly connected to the inner end of the sealing block, a receiving groove opened at the end of the bottom surface of the snap-fitting convex strip and a docking nozzle arranged inside the receiving groove; a return cavity is opened at the outer end of the installation cavity, and a thrust assembly for pushing the sealing block down is arranged inside the return cavity; a flow cavity is opened inside the sealing block, and a plurality of flow holes connected with the flow cavity are opened on the circumferential side of the top surface of the sealing block; the outer end of the movable tube is connected with the flow cavity; the movable tube movably penetrates into the storage interior and is fixedly connected with the docking nozzle; a sealing rubber sleeve is sleeved on the outer wall of the docking nozzle.

[0007] Preferably, a return spring is sleeved on the outer wall of the tube body of the movable tube located inside the installation cavity, a sealing ring is fixedly connected to the outer ring of the top surface of the sealing block, and a sealing gasket is fixedly connected to the bottom of the sealing block; and an abutment ring cooperating with the sealing gasket is fixedly connected to the outer wall of the inner bottom surface of the installation cavity.

[0008] Preferably, the thrust assembly includes a pushing block movably arranged inside the return cavity, a connecting rod fixedly connected to the inner end surface of the pushing block, and a return spring movably sleeved on the connecting rod, the inner end of the connecting rod movably penetrates into the interior of the installation cavity and is fixedly connected to the outer end surface of the sealing block; the outer end of the pushing block movably penetrates into the interior of the positioning screw tube; and the front end surface of the pushing block is a sloped surface inclined backward.

[0009] Preferably, a spiral groove matching the internal thread of the positioning screw tube is formed on the outer end surface of the pushing block; and a sealing ring is fixedly sleeved on the outer wall of the pushing block located inside the return cavity.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention facilitates the liquid cooling treatment of the motor stator with two different flow rates through the cooperation of the cooling sleeve with the guide cavity, the cooling strip cavity and the guiding mechanism, plays a dual and different flow rate cooling role, and can firmly connect the motor stator and the cooling sleeve, improve the connection strength between the two, and facilitate multiple speed reduction treatments of the cooling liquid from the inside of the guide cavity, so that while effectively cooling the motor stator, the heat emitted by the motor stator can be carried out by the slowly passing cooling liquid, and at the same time, the uniformity of the cooling sleeve in dissipating heat and cooling the motor stator can be improved, which greatly improves the cooling effect on the motor stator, thereby effectively reducing the failure rate of the high-speed servo motor during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0012] Figure 1 It is a schematic diagram of the structure of the motor body of the present invention;

[0013] Figure 2 It is a schematic diagram of the main structure of the motor stator and cooling jacket of the present invention;

[0014] Figure 3 It is a schematic diagram of the three-dimensional structure of the motor stator of the present invention;

[0015] Figure 4 It is a schematic diagram of the three-dimensional structure of the cooling jacket of the present invention;

[0016] Figure 5 It is a front structural cross-sectional view of the motor stator and cooling jacket of the present invention;

[0017] Figure 6 It is a cross-sectional view of the main structure of the cooling jacket and the reinforcement convex strip of the present invention;

[0018] Figure 7 For the present invention Figure 5 A magnified cross-sectional view of the structure of part A in the middle;

[0019] Figure 8 It is a cross-sectional view of the structure of one side of the push block of the present invention.

[0020] Serial numbers in the figure: 1. Motor body; 2. Motor stator; 3. Cooling jacket; 4. Reinforcement convex strip; 5. Positioning screw; 6. Snap-on convex strip; 7. Speed ​​reduction chamber; 8. Diversion chamber; 9. Speed ​​reduction port; 10. Cooling strip chamber; 11. Sealing block; 12. Movable pipe; 13. Sealing ring; 14. Sealing pad; 15. Butt nozzle; 16. Connecting rod; 17. Pushing block; 18. Return spring; 19. Sealing ring; 20. Reset spring; 21. Abutment ring; 22. Connecting hole; 23. Diversion port; 24. Liquid inlet pipe; 25. Liquid outlet pipe; 26. Liquid cooler. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Example: See Figures 1 to 8A high-speed servo motor with stator cooling comprises a motor body 1 and a motor stator 2 installed inside the motor body 1. A liquid cooler 26 is installed on the top of the outer shell of the motor body 1. A cooling jacket 3 is sleeved on the outer wall of the motor stator 2. A plurality of reinforcing convex strips 4 are longitudinally protruded on the peripheral side of the outer wall of the cooling jacket 3. A positioning hole is opened on the front end surface of the reinforcing convex strip 4. A positioning spiral tube 5 is fixed inside the positioning hole. A plurality of snap-in strip grooves are equidistantly opened on the outer wall of the motor stator 2; a plurality of snap-in convex strips 6 are equidistantly protruded on the inner ring wall of the cooling jacket 3, and the snap-in convex strips 6 are snap-fitted inside the snap-in strip grooves; a coil-shaped guide strip is opened inside the cooling jacket 3 along the length direction. The flow cavity 8, a plurality of deceleration cavities 7 connected to the flow guide cavity 8 are longitudinally provided inside the reinforcement convex strip 4, and the deceleration cavity 7 is divided into a plurality of flow-blocking cavities at four corners with the positioning hole as the center; a deceleration port 9 is provided between the flow-blocking cavities at the inner and outer ends of the deceleration cavity 7, and a liquid inlet pipe 24 connected to the front end deceleration cavity 7 is vertically provided at the front end of the outer wall of the reinforcement convex strip 4 on the top of the cooling jacket 3, and the outer end of the liquid inlet pipe 24 is fixedly connected to the liquid outlet end of the liquid cooler 26; a liquid outlet pipe 25 connected to the rear end deceleration cavity 7 is vertically provided at the rear end of the outer wall of the reinforcement convex strip 4 on the top of the cooling jacket 3, and the outer end of the liquid outlet pipe 25 is fixedly connected to the liquid return end of the liquid cooler 26; the circumferential side inside the motor stator 2 is longitudinally provided A plurality of cooling strip cavities 10 are provided, and the front and rear ends of the outer walls of the cooling strip cavities 10 are provided with connecting holes 22 connected to the card-joint grooves, and the front and rear ends of the reinforcing convex strips 4 are provided with mounting cavities matching the connecting holes 22, and the mounting cavity is provided with a guide mechanism for supplying cold to the cooling strip cavities 10; a V-shaped conveying cavity is provided in the middle of the outer end of the reinforcing convex strip 4, and through openings connected to the blocking cavity are provided on the inner walls on both sides of the conveying cavity; guide openings 23 connected to the blocking cavity are provided on the inner walls on both sides of the upper part of the mounting cavity; the blocking cavities on both sides of the bottom of the deceleration cavity 7 are connected to the guide cavity 8; the cooling sleeve 3 is connected to the guide cavity 8 and the cooling strip cavity 10 and the guide mechanism The cooperation is convenient for performing liquid cooling and temperature reduction treatments on the motor stator 2 with two different flow rates, and can firmly connect the motor stator 2 and the cooling sleeve 3, thereby improving the connection strength between the two. At the same time, it is convenient to perform multiple speed reduction treatments on the coolant from the inside of the guide cavity 8, so that while effectively cooling the motor stator 2, the heat emitted by the motor stator 2 can be carried out by the slowly passing coolant, and at the same time, the uniformity of the cooling sleeve 3 in dissipating heat and cooling the motor stator 2 can be improved, thereby greatly improving the cooling effect on the motor stator 2, thereby effectively reducing the failure rate of the high-speed servo motor during use.

[0023] In the present invention, the guiding mechanism includes a sealing block 11 with a vertical dynamic seal arranged in the upper part of the installation cavity, a movable tube 12 fixedly connected to the inner end of the sealing block 11, a receiving groove provided at the end of the bottom surface of the clamping convex strip 6 and a docking nozzle 15 provided inside the receiving groove, a one-way liquid outlet valve is installed inside the docking nozzle 15 at the front end of the reinforcement convex strip 4, and a one-way liquid inlet valve is installed inside the docking nozzle 15 at the rear end of the reinforcement convex strip 4, a return cavity is provided at the outer end of the installation cavity, and a thrust assembly for pushing the sealing block 11 down is provided inside the return cavity; through the thrust assembly, when the external screw connected to the inside of the positioning screw tube 5 is removed, the sealing block 11 can drive the docking nozzle 15 at the bottom end of the movable tube 12 to move back and be stored with the cooperation of the return spring 18 and the reset spring 20 in the thrust assembly, so as to facilitate the subsequent Regarding the disassembly operation of the motor stator 2; a flow cavity is provided inside the sealing block 11, and a plurality of flow holes connected to the flow cavity are provided on the circumferential side of the top surface of the sealing block 11; the outer end of the movable tube 12 is connected to the flow cavity; the movable tube 12 is movable and penetrates into the storage interior, and is fixedly connected to the docking nozzle 15; a sealing rubber sleeve is sleeved on the outer wall of the docking nozzle 15; a reset spring 20 is sleeved on the outer wall of the tube body of the movable tube 12 located inside the installation cavity, a sealing ring 13 is fixedly connected to the outer ring of the top surface of the sealing block 11, and a sealing gasket 14 is fixedly connected to the bottom of the sealing block 11; an abutment ring 21 cooperating with the sealing gasket 14 is fixedly connected to the outer wall of the inner bottom surface of the installation cavity; through the cooperation of the sealing gasket 14 with the sealing ring 13 and the abutment ring 21, the sealing performance of the sealing block 11 during movement is greatly improved.

[0024] In the present invention, the thrust assembly includes a push block 17 movably arranged inside the return cavity, a connecting rod 16 fixedly connected to the inner end surface of the push block 17, and a return spring 18 movably sleeved on the connecting rod 16. The inner end of the connecting rod 16 movably penetrates into the interior of the installation cavity and is fixedly connected to the outer end surface of the sealing block 11; the outer end of the push block 17 movably penetrates into the interior of the positioning screw 5; and the front end surface of the push block 17 is in the shape of an inclined surface inclined backward; a spiral groove is provided on the outer end surface of the push block 17, which cooperates with the internal thread of the positioning screw 5, so as to improve the screwing effect between the two when the external screw is screwed into the interior of the positioning screw 5; a sealing ring 19 is fixedly sleeved on the outer wall of the push block 17 located inside the return cavity; the sealing ring 19 can improve the sealing effect and stability of the push block 17 during the movement.

[0025] Working principle: In this embodiment, the present invention also proposes a method for using a high-speed servo motor with stator cooling, comprising the following steps:

[0026] Step 1, firstly, sleeve the cooling jacket 3 with the reinforcing ribs 4 and the snap-on ribs 6 onto the outer wall of the motor stator 2, then fix the cooling jacket 3 with the positioning solenoid 5 inside the motor body 1 by long bolts, and then complete the installation and fixation of the motor stator 2, then install the structures with coils and rotors into the motor body 1 one by one, then inject coolant into the liquid cooler 26, then fix the liquid outlet end of the liquid cooler 26 with the liquid inlet pipe 24, and then fix the liquid return end of the liquid cooler 26 with the liquid outlet pipe 25; then the liquid cooler 26 is electrically connected to the control box of the high-speed servo motor through a wire, so that when the motor stator 2 is overheated, the liquid cooler 26 can be started autonomously through the control box on the high-speed servo motor;

[0027] Step 2, when the cooling jacket 3 is fixed by the external long screw, the screw rod of the screw is screwed into the interior of the positioning screw tube 5, and then under the action of the screw rod, the push block 17 is squeezed into the interior of the return cavity, and then the moving push block 17 pushes the sealing block 11 to move inside the installation cavity, and the movement of the sealing block 11 facilitates the push of the docking nozzle 15 fixed to the movable tube 12 to extend out from the inside of the storage groove, and the docking nozzle 15 is sealed and inserted into the inside of the connecting hole 22, so as to facilitate further processing of the connection strength between the cooling jacket 3 and the motor stator 2, and after the sealing block 11 moves inward, the guide port 23 is also in a connected state with the installation cavity, so that the coolant inside the flow blocking cavity can enter the cooling strip cavity 10 through the liquid cavity and the liquid hole;

[0028] Step three, after the cooling strip cavity 10 is connected with the speed reduction cavity 7, when the motor body 1 is started to drive, the rotor under high-speed rotation will cause local overheating of the winding end. At this time, the liquid cooler 26 is started to transport the coolant into the delivery cavity through the liquid inlet pipe 24, and then the coolant in the delivery cavity will enter the choke cavity on both sides, so as to play a preliminary diversion and speed reduction role for the injected coolant. Then, when the coolant in the choke cavity on both sides passes through the speed reduction port 9 and enters the choke cavity at the inner end, it will be The speed reduction process is performed again; it is convenient to reduce the speed of the coolant flowing through the speed reduction chamber 7, and the motor stator 2 is effectively heat-dissipated by the speed reduction process of the coolant; then a part of the coolant inside the flow-blocking chamber on both sides of the inner end will enter the coil-shaped guide chamber 8, and then this part of the coolant will continue to be decelerated when passing through the coil-shaped guide chamber 8 and the speed reduction chamber 7 in turn, so as to improve the cooling effect of the coolant on the motor stator 2, so as to be able to efficiently carry out the heat of the motor stator 2;

[0029] In step 4, at the same time, another part of the coolant in the flow-blocking cavities on both sides will enter the installation cavity through the guide port 23, and then the coolant in the installation cavity will enter the movable tube 12 under the action of the liquid hole and the liquid cavity, and then the coolant will be injected into the front inner wall of the cooling strip cavity 10 through the docking nozzle 15. Since the cooling strip cavity 10 is linear, the coolant passing through the cooling strip cavity 10 will quickly reach the speed reduction cavity 7 at the rear end of the reinforcement convex strip 4, and then, at this time, it will flow back into the installation cavity at the rear end through the docking nozzle 15 at its rear end, and then, under the action of the rear end speed reduction cavity 7, the coolant carrying heat will flow back into the liquid cooler 26 through the liquid outlet pipe 25 for a second cooling operation, and then the coolant passing through the coil-shaped guide cavity 8 will reach the speed reduction cavity 7, and then flow back into the liquid cooler 26 through the liquid outlet pipe 25 for a second cooling operation, and through the circulation and transportation of the coolant, it is convenient to improve the efficient heat dissipation effect of the motor stator 2.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-speed servo motor with stator cooling, comprising a motor body (1) and a motor stator (2) installed inside the motor body (1), Features: A liquid cooler (26) is installed on the top of the outer shell of the motor body (1), and a cooling jacket (3) is sleeved on the outer wall of the motor stator (2). The outer wall of the cooling jacket (3) is longitudinally protruded with a plurality of reinforcing ribs (4), and a positioning hole is provided on the front end surface of the reinforcing rib (4). A positioning screw (5) is fixedly provided inside the positioning hole. A plurality of snap-in grooves are equidistantly provided on the outer wall of the motor stator (2); a plurality of snap-in ribs (6) are equidistantly protruded on the inner wall of the cooling jacket (3), and the snap-in ribs (6) are snap-fitted inside the snap-in grooves; a coil-shaped flow guide cavity (8) is provided inside the cooling jacket (3) along the length direction, and a plurality of speed reduction cavities (7) connected to the flow guide cavity (8) are longitudinally provided inside the reinforcing rib (4), and the speed reduction cavity (7) is divided into a plurality of flow blocking cavities at four corners with the positioning hole as the center; the inner and outer ends of the speed reduction cavity (7) are A deceleration port (9) is provided between the flow-blocking cavities; a liquid inlet pipe (24) communicating with the front deceleration cavity (7) is vertically provided at the front end of the outer wall of the reinforcing convex strip (4) at the top of the cooling jacket (3); the outer end of the liquid inlet pipe (24) is fixedly connected to the liquid outlet end of the liquid cooler (26); a liquid outlet pipe (25) communicating with the rear deceleration cavity (7) is vertically provided at the rear end of the outer wall of the reinforcing convex strip (4) at the top of the cooling jacket (3); the outer end of the liquid outlet pipe (25) is fixedly connected to the liquid return end of the liquid cooler (26); a plurality of cooling strip cavities (10) are longitudinally provided on the circumferential side inside the motor stator (2); the front and rear ends of the outer walls of the cooling strip cavities (10) are both provided with connecting holes (22) communicating with the clamping grooves; the front and rear ends of the reinforcing convex strips (4) are both provided with installation cavities cooperating with the connecting holes (22); a guide mechanism for supplying cold to the cooling strip cavities (10) is provided inside the installation cavity; The guiding mechanism comprises a sealing block (11) with a vertical dynamic seal arranged in the upper part of the installation cavity, a movable tube (12) fixedly connected to the inner end of the sealing block (11), a receiving groove arranged at the bottom end of the clamping convex strip (6), and a docking nozzle (15) arranged inside the receiving groove, a return cavity is arranged at the outer end of the installation cavity, and a thrust assembly for pushing the sealing block (11) downward is arranged inside the return cavity; a flow cavity is arranged inside the sealing block (11), and a plurality of flow holes connected to the flow cavity are arranged on the circumferential side of the top surface of the sealing block (11); the outer end of the movable tube (12) is connected to the flow cavity; the movable tube (12) movably penetrates into the storage interior and is fixedly connected to the docking nozzle (15); a sealing rubber sleeve is sleeved on the outer wall of the docking nozzle (15).

2. A high-speed servo motor with stator cooling according to claim 1, Features: A V-shaped conveying cavity is provided in the middle of the outer end of the reinforcing convex strip (4), and through openings communicating with the flow blocking cavity are provided on the inner walls on both sides of the conveying cavity; flow guide openings (23) communicating with the flow blocking cavity are provided on the inner walls on the upper parts of both sides of the installation cavity; and the flow blocking cavities on both sides of the bottom of the deceleration cavity (7) are communicated with the flow guide cavity (8).

3. A high-speed servo motor with stator cooling according to claim 2, Features: The movable tube (12) is sleeved with a return spring (20) on the outer wall of the tube body located inside the installation cavity, the top surface outer ring of the sealing block (11) is fixedly connected with a sealing ring (13), and the bottom of the sealing block (11) is fixedly connected with a sealing gasket (14); the inner bottom surface outer wall of the installation cavity is fixedly connected with a contact ring (21) that cooperates with the sealing gasket (14).

4. A high-speed servo motor with stator cooling according to claim 2, Features: The thrust assembly comprises a push block (17) movably arranged inside the return cavity, a connecting rod (16) fixedly connected to the inner end surface of the push block (17), and a return spring (18) movably sleeved on the connecting rod (16); the inner end of the connecting rod (16) movably penetrates into the interior of the installation cavity and is fixedly connected to the outer end surface of the sealing block (11); the outer end of the push block (17) movably penetrates into the interior of the positioning screw tube (5); and the front end surface of the push block (17) is in the shape of an inclined surface inclined backwards.

5. A high-speed servo motor with stator cooling according to claim 4, Features: The outer end surface of the push block (17) is provided with a spiral groove that matches the internal thread of the positioning spiral tube (5); and a sealing ring (19) is fixedly sleeved on the outer wall of the push block (17) located inside the return cavity.

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