Output bearing heat dissipation type high-speed motor equipment

Abstract

The application discloses an output bearing heat dissipation type high-speed motor equipment and relates to the field of motor equipment. The equipment comprises a casing, a heat dissipation end cover, a rotating shaft, a positioning ring, a high-speed bearing, an end cover shell, a heat conduction piece, a cold source end, a heat exhaust end and a temperature sensing piece. The end cover shell is fixed to the outside of the heat dissipation end cover, the positioning ring is limitedly installed in the inner groove of the end cover shell, the high-speed bearing is fixed to the inner ring of the positioning ring, and the rotating shaft penetrates through the related components and is connected with the inner ring of the high-speed bearing. The heat dissipation column groove is arranged on the ring side of the positioning ring, the screw holes are correspondingly arranged on the ring side of the end cover shell, the heat conduction piece is installed between the heat dissipation column groove and the screw holes, and the metal rod of the heat conduction piece is provided with a shunt groove and a turbulence hole. The cold source end, the heat exhaust end and the temperature sensing piece which are communicated with the inner groove are installed on the outside of the end cover shell. The heat conduction piece directly contacts the heat dissipation column groove of the outer ring of the high-speed bearing, forced convection of the cold medium under the action of the shunt groove and the turbulence hole is combined, heat is rapidly transferred, the heat dissipation efficiency is greatly improved, and the heat conduction piece is convenient to clean to maintain efficient heat conduction.

Description

Technical Field

[0001] The present invention relates to the field of motor equipment, and in particular to an output bearing heat dissipation type high-speed motor equipment. Background Art

[0002] High-speed motors, with their advantages of high power density and rapid response, are widely used in high-end fields such as aerospace, precision manufacturing, and new energy. However, their core mechanical components, particularly the output-side bearings, are constantly subjected to extreme operating conditions. On the one hand, the bearings must withstand the high-frequency radial loads and axial impacts caused by the high-speed operation of the shaft, generating significant frictional heat. On the other hand, electromagnetic losses in the stator and rotor within the motor generate significant heat, which is easily transferred to the output-side bearings, causing a sharp increase in bearing operating temperature. (Excessive bearing temperature can lead to internal lubrication failure, material degradation, and a sharp reduction in service life, seriously affecting the overall operational stability of the equipment.)

[0003] Currently, existing high-speed motor bearing heat dissipation solutions have many limitations:

[0004] Low heat dissipation efficiency: Traditional heat dissipation methods mostly rely on natural heat dissipation from the casing or external fan cooling. Heat needs to be transferred to the outside through multi-layer structures such as the bearing seat and casing. The heat dissipation path is long and the thermal resistance is large, making it difficult to quickly remove the friction heat from the core area of ​​the bearing. As a result, the bearings operate at high temperatures (often exceeding 80°C) for a long time, the grease is prone to failure, and the metal material is prone to fatigue, which significantly shortens the service life of the bearing and may even cause serious faults such as seizure and burning.

[0005] Poor maintenance convenience: The heat-conducting components of some liquid-cooled heat dissipation structures are integrated with the bearing seat. After long-term use, the heat-conducting surface is prone to accumulation of oil, cooling medium impurities, dust, etc., affecting the heat transfer efficiency. The motor body needs to be disassembled for cleaning, which is complicated to operate and has high maintenance costs.

[0006] Therefore, how to achieve efficient heat dissipation of the output side bearing while taking into account the operating stability and maintenance convenience of the high-speed motor has become a problem that needs to be solved in the field of high-speed motor equipment technology. Summary of the Invention

[0007] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The present invention provides an output bearing heat dissipation type high-speed motor device, comprising a casing, a heat dissipation end cover on the output side of the casing, a rotating shaft passing through the heat dissipation end cover, an end cover shell fixedly mounted on the outer side of the heat dissipation end cover, the end cover shell comprising an inner groove, and a positioning ring being installed in the inner groove as a limit.

[0009] A sealing structure is provided between the locating ring and the inner groove wall and the outer side surface of the heat dissipation end cover. The high-speed bearing is fixedly installed on the inner periphery of the locating ring. The rotating shaft passes through the locating ring and the center position of the end cover and is fixedly connected to the inner ring of the high-speed bearing. A plurality of radially distributed heat dissipation column grooves are provided on the side of the locating ring, and the heat dissipation column grooves pass through and contact the outer ring surface of the outer ring of the high-speed bearing.

[0010] The end cover ring features multiple screw holes aligned with the heat sink slots. Heat conductors are installed at the radially aligned screw holes and heat sink slots. The heat conductors consist of a metal rod inserted into the inner groove of the end cover, with one end inserted into the heat sink slot. The rod features multiple diversion slots parallel to its axis, and a flow-disrupting hole perpendicular to the diversion slots is located on the ring side of the rod.

[0011] A cold source end communicating with the bottom area of ​​the inner tank and a heat exhaust end communicating with the top area of ​​the inner tank are installed on the outside of the end cover. The end cover is also equipped with a temperature sensor inserted into the inner tank.

[0012] As a preferred technical solution for the motor device of the present invention: an inner sealing ring is arranged at the position where the rotating shaft passes through the heat dissipation end cover, a shaft through hole is opened at the center of the end cover, the rotating shaft passes through the shaft through hole and is arranged with an outer sealing ring.

[0013] As a preferred technical solution for the motor equipment of the present invention: a group of positioning notches are set on the side edge of the positioning ring, an outer limiting convex ring is set on the outer side surface of the heat dissipation end cover to match the positioning notches on one side of the positioning ring, and an inner limiting convex ring is set on the inner groove wall surface of the end cover to match the positioning notch on the other side of the positioning ring.

[0014] As a preferred technical solution of the motor equipment of the present invention: the axial width of the high-speed bearing is smaller than the axial width of the positioning ring, and a sealing coating is pre-sprayed between the outer ring surface of the high-speed bearing outer ring and the inner ring surface of the positioning ring.

[0015] As a preferred technical solution of the motor equipment of the present invention: the diameter of the metal rod is smaller than the diameter of the heat dissipation column groove, and there is a gap between the end side surface of the metal rod inserted into the heat dissipation column groove and the outer ring surface of the high-speed bearing outer ring.

[0016] As an optimal technical solution for the motor equipment of the present invention: the rod body part of the metal rod inserted into the heat dissipation column groove is not provided with a spoiler hole, which increases the volume of this part of the metal rod, enhances the degree of heat absorption, and can also avoid turbulence of the medium in the heat dissipation column groove, thereby accelerating the directional flow of the medium in the heat dissipation column groove.

[0017] As a preferred technical solution for the motor equipment of the present invention: the metal rod is provided with a threaded portion that is screwed into the screw hole, the diversion groove provided on the metal rod extends to the threaded portion, and the heat conductor also includes a nut located at the other end of the metal rod, the nut is located outside the end cover ring side, and a sealing ring is installed between the nut and the end cover ring side.

[0018] As a preferred technical solution of the motor device of the present invention: the end cover and the heat dissipation end cover are connected through a flange structure and are provided with a second sealing rubber ring.

[0019] As a preferred technical solution for the motor device of the present invention, a cold medium supply device is connected upstream of the cold source end, and a medium circulation device is connected downstream of the heat removal end. The cold medium injected into the inner tank by the cold source end is a cooling gas or fluid. The cold medium supply device injects the cold medium into the cold source end. The cold medium enters the inner tank and is evenly dispersed by the turbulence of the heat conductive element. It absorbs heat from the heat conductive element, and the medium in the heat dissipation column groove can also flow rapidly to dissipate heat from the high-speed bearing. The cold medium moves upward, the medium temperature rises, and is discharged from the heat removal end to the medium circulation device. It is cooled again by the cold medium supply device and circulated into the inner tank.

[0020] Compared with the existing technology, the beneficial effects of the present invention are:

[0021] This invention achieves rapid heat transfer from the bearing to the cooling medium by directly contacting the heat-dissipating column grooves on the high-speed bearing outer ring with a heat-conducting element. Combined with forced convection of the cooling medium through the diverter grooves and turbulent holes, this method achieves rapid heat transfer from the bearing to the cooling medium. The cooling medium, injected through the cold source and discharged through the heat exhaust, circulates through the cooling channel, removing frictional heat from the bearing core area and heat conducted by the motor, significantly improving heat dissipation efficiency. Furthermore, after extended operation, the heat-conducting element can be quickly and conveniently cleaned, ensuring efficient heat transfer.

[0022] The present invention uses a positioning ring that precisely cooperates with the inner and outer limiting convex rings through a locking notch, combined with a sealing coating and a multiple sealing ring design, to ensure the axial and radial positioning accuracy of the bearing while enhancing heat dissipation, thereby avoiding the intensification of vibration caused by the destruction of the matching accuracy due to the heat dissipation structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the main components of the motor equipment of the present invention.

[0024] Figure 2 for Figure 1 Schematic diagram of the structure with a partial enlargement at point A in the middle.

[0025] Figure 3 It is a schematic side view of the middle end cover of the present invention.

[0026] Figure 4 This is a schematic diagram of the disassembled structure of the components of the motor equipment of the present invention.

[0027] Figure 5 It is a structural schematic diagram of the positioning ring and high-speed bearing of the present invention.

[0028] Figure 6 Schematic diagram of the structure of the heat conducting element in the present invention.

[0029] Figure 7 It is a side view of the heat conducting member in the present invention.

[0030] Figure 8 for Figure 7 Cross-sectional view along the BB direction.

[0031] Among them: 1- housing, 101- heat dissipation end cover, 102- rotating shaft, 103- inner sealing ring, 104- outer limiting convex ring; 2- positioning ring, 201- positioning notch, 202- first sealing rubber ring, 203- heat dissipation column groove, 204- sealing coating; 3- high-speed bearing; 4- end cover, 401- inner groove, 402- inner limiting convex ring, 403- shaft through hole, 404- outer sealing ring, 405- screw hole, 406- second sealing rubber ring; 5- heat conducting part, 501- metal rod, 502- diverter groove, 503- spoiler hole, 504- threaded part, 505- nut; 6- cold source end; 7- heat exhaust end; 8- temperature sensor. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] Example 1: Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 The motor device of the present invention mainly consists of a housing 1, a heat dissipation end cover 101, a rotating shaft 102, a positioning ring 2, a high-speed bearing 3, an end cover 4, a heat conducting member 5, a cold source end 6, a heat exhaust end 7, a temperature sensor 8 and various sealing components. The core achieves efficient heat dissipation of the high-speed bearing 3 through targeted structural design. The specific structure and connection relationship are as follows:

[0034] like Figure 2 、 Figure 4 The heat sink cover 101 is fixed to the output side of the housing 1 and serves as the mounting support for the end housing 4. An external retaining ring 104 is provided on the outer side of the heat sink cover 101 (which engages with a retaining notch 201 on one side of the positioning ring 2). The heat sink cover 101 and the end housing 4 are connected via a flange structure, and a second sealing rubber ring 406 is installed on the contact surface to ensure a tight seal between the two.

[0035] like Figure 1 、 Figure 4The rotating shaft 102 passes through the heat dissipation end cover 101, the positioning ring 2, and the center of the end cover 4. It is fixedly connected to the inner ring of the high-speed bearing 3 and is the core shaft of the power output. The inner seal 103 is installed where the rotating shaft 102 passes through the heat dissipation end cover 101 (isolating the motor interior from the outside). The outer seal 404 is installed where the rotating shaft 102 passes through the shaft hole 403 of the end cover 4 (isolating the inner groove 401 of the end cover 4 from the external environment).

[0036] like Figure 2 、 Figure 4 、 Figure 5 The positioning ring 2 is fixedly mounted in the inner groove 401 of the end housing 4. A set of retaining notches 201 are provided on the ring's side edge (which respectively cooperate with the outer retaining protrusion 104 of the heat dissipation end cover 101 and the inner retaining protrusion 402 of the inner groove 401 of the end housing 4 to achieve precise positioning). A first sealing rubber ring 202 forms a seal between the positioning ring 2, the inner groove 401 wall, and the outer surface of the heat dissipation end cover 101. The positioning ring 2 has a plurality of radially distributed heat dissipation column grooves 203 on its surface (which extend through the outer surface of the high-speed bearing 3 outer ring to release heat from the high-speed bearing 3).

[0037] like Figure 2 、 Figure 4 、 Figure 5 High-speed bearing 3 is fixed to the inner periphery of retaining ring 2. The inner ring is fixedly connected to rotating shaft 102 and supports the high-speed operation of rotating shaft 102. The axial width of high-speed bearing 3 is smaller than that of retaining ring 2 (to avoid axial interference). A sealing coating 204 is pre-sprayed between the outer annular surface of the outer ring of high-speed bearing 3 and the inner annular surface of retaining ring 2 (to enhance sealing).

[0038] like Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 The end housing 4 is fixed to the outside of the heat dissipation end cap 101. An inner groove 401 is defined within the end housing 4 to accommodate the positioning ring 2 and the cooling medium. A shaft through-hole 403 is defined in the center of the end housing 4 for the shaft 102 to pass through. Multiple screw holes 405 are defined on the side of the ring (radially aligned with the heat dissipation column grooves 203 of the positioning ring 2 and used to mount the heat conductor 5). An inner retaining ring 402 is provided on the wall of the inner groove 401 of the end housing 4 to engage with the retaining notch 201 of the positioning ring 2 for positioning and installation.

[0039] like Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8The heat conducting member 5 is installed between the radially aligned screw holes 405 and the heat dissipation column slot 203. The heat conducting member 5 includes a metal rod 501 and a nut 505. The metal rod 501 is inserted into the inner slot 401 of the end cover 4 and one end is inserted into the heat dissipation column slot 203. The diameter of the metal rod 501 is smaller than the diameter of the heat dissipation column slot 203 (reserving space for medium flow). There is a gap between the side surface of the metal rod 501 inserted into the heat dissipation column slot 203 and the outer annular surface of the outer ring of the high-speed bearing 3 (to ensure the flow of the cooling medium). The metal rod 501 is provided with multiple diverter grooves 502 parallel to its axis (to disperse the cooling medium) and flow disturbance holes 503 extending perpendicularly through the diverter grooves 502 (to enhance cooling medium turbulence and improve heat exchange efficiency). The portion of the metal rod 501 inserted into the heat dissipation column groove 203 is not provided with flow disturbance holes 503. This increases the volume of the metal rod 501 in this portion, enhancing heat absorption, preventing turbulence within the heat dissipation column groove 203, and accelerating the directional flow of the medium within the heat dissipation column groove 203. The metal rod 501 also has a threaded portion 504 that engages with the screw hole 405. The diverter groove 502 extends to the threaded portion 504. A nut 505 is located outside the ring side of the end cover 4, and a sealing ring is installed between the nut and the ring side of the end cover 4 to ensure the sealing of the screw hole 405.

[0040] like Figure 1 、 Figure 3 、 Figure 4 The cold source end 6 is mounted on the outside of the end housing 4 and communicates with the bottom area of ​​the inner tank 401. The upstream of the cold source end 6 is connected to a cold medium supply device (providing cooling gas or fluid) for injecting cold medium into the inner tank 401. The heat exhaust end 7 is mounted on the outside of the end housing 4 and communicates with the top area of ​​the inner tank 401. The downstream of the heat exhaust end 7 is connected to a medium circulation device (such as a heat exchanger) for exhausting the heat medium after absorbing heat.

[0041] like Figure 2 、 Figure 3 The temperature sensor 8 is inserted into the inner groove 401 of the end cover 4, and the detection end is in direct contact with the medium in the inner groove 401. The temperature sensor 8 is used to monitor the medium temperature in real time and provide a basis for regulating the flow of the cold medium.

[0042] Example 2: The core components of the motor equipment of the present invention are assembled as follows:

[0043] 1. Installation of locating ring and high-speed bearing:

[0044] The high-speed bearing 3 is embedded in the inner periphery of the positioning ring 2 to ensure that the outer ring surface of the outer ring of the high-speed bearing 3 is in continuous contact with the heat dissipation column groove 203 (distributed radially) of the positioning ring 2.

[0045] 2. Sealing treatment of the shaft and heat dissipation end cover:

[0046] The rotating shaft 102 is passed through the center hole of the heat dissipation end cover 101, and the inner sealing ring 103 is installed at the penetration position (close to the inner side of the housing 1) to ensure the sealing isolation between the inside and outside of the motor.

[0047] 3. Assembly of heat dissipation end cover and positioning ring:

[0048] Install a first sealing rubber ring 202 on the outer side of the heat dissipation end cover 101 to ensure that it is sealed with the contact surface of the positioning ring 2. Align the "locking notch 201" on the side edge of the positioning ring 2 with the "outer limiting protrusion 104" on the outer side of the heat dissipation end cover 101, insert and lock them accordingly (to ensure that the heat dissipation column groove 203 is aligned with the screw hole 405, a corresponding positioning structure can be set when the positioning ring 2 and the heat dissipation end cover 101 are installed and matched. There are many structural methods for achieving locking in the prior art, which will not be repeated in the present invention. The design can be selected according to actual needs) to ensure that the positioning ring 2 and the heat dissipation end cover 101 are relatively fixed.

[0049] 4. Connection between the end cover and the heat dissipation end cover:

[0050] Install the second sealing rubber ring 406 on the flange contact surface between the end cover 4 and the heat dissipation end cap 101. Snap the end cover 4 onto the outside of the heat dissipation end cap 101, aligning and locking the "inner limiting protrusion 402" on the wall of the inner groove 401 of the end cover 4 with the "locking notch 201" on the other side of the positioning ring 2. Ensure that the positioning ring 2 is restrained in the inner groove 401 and that the positioning ring 2 fits tightly against the wall of the inner groove 401 and the sealing structure (first sealing rubber ring 202) on the outer side of the heat dissipation end cap 101. Confirm that the screw holes 405 on the ring side of the end cover 4 are radially aligned with the heat dissipation column groove 203 of the positioning ring 2. Tighten the flange structure with bolts to complete the fixation of the end cover 4 to the heat dissipation end cap 101.

[0051] 5. Heat conduction parts installation:

[0052] Install a sealing ring between the nut 505 and the side of the end cover 4 to ensure a tight seal at the screw hole 405. Insert one end of the metal rod 501 of the heat conductor 5 (the section without the spoiler hole 503) into the heat dissipation column slot 203. Rotate the metal rod 501 so that its threaded portion 504 engages with the screw hole 405 of the end cover 4 until the nut 505 at the other end of the metal rod 501 is firmly against the side of the end cover 4.

[0053] 6. Sealing treatment of the rotating shaft and end cover:

[0054] After the rotating shaft 102 passes through the shaft through hole 403 in the center of the end cover 4, an outer sealing ring 404 is installed outside the shaft through hole 403 to ensure the sealing between the inner groove 401 of the end cover 4 and the external environment.

[0055] 7. Temperature sensor installation:

[0056] Insert the temperature sensor 8 into the inner groove 401 (preset mounting hole) of the end cover 4, ensure that its detection end is in direct contact with the medium in the inner groove 401, and connect the circuit to the motor control system.

[0057] 8. Connection between heat source and heat removal system:

[0058] Install the cold source end 6 at the bottom of the inner tank 401 outside the end housing 4 (corresponding to the cold medium inlet), and connect it upstream to a cold medium supply device (such as a cooling pump or air pump). Install the heat exhaust end 7 at the top of the inner tank 401 outside the end housing 4 (corresponding to the hot medium outlet), and connect it downstream to a medium circulation device (such as a heat exchanger or recovery tank).

[0059] Example 3: The operating principle of the motor device of the present invention is as follows:

[0060] 1. Start the cold medium circulation system first: inject cold medium into the inner tank 401 through the cold source end 6. After the medium fills the inner tank 401 and flows back to the circulation equipment from the heat exhaust end 7, maintain low-speed circulation (to avoid initial impact).

[0061] 2. Start the motor: After the cold medium circulation is stable, start the high-speed motor, and the rotating shaft 102 drives the high-speed bearing 3 to rotate. At this time, the heat generated by the high-speed bearing 3 is transferred through the outer ring and released to the heat dissipation column groove 203 area of ​​the positioning ring 2.

[0062] 3. Heat dissipation by heat-conducting parts: Under the action of the heat-conducting part 5, the cold medium is dispersed through the diverter groove 502 of the metal rod 501 and disturbed by the spoiler hole 503, and evenly contacts the surface of the metal rod 501, absorbing the heat transferred and released by the heat dissipation column groove 203 (the section of the metal rod 501 without the spoiler hole 503 enhances heat absorption). The hot medium is discharged from the heat exhaust end 7 and re-enters the cold source end 6 after being cooled by the circulation equipment.

[0063] 4. Temperature monitoring: The temperature sensor 8 monitors the medium temperature T in the inner tank 401 in real time. x , the control system displays the temperature difference ΔT=T in real time x -T0.

[0064] When T x When ≤T0, the cold medium maintains the basic flow circulation. x >T0, the system automatically increases the cold medium supply rate (rate V is proportional to ΔT) until T x ≤T0, ensure that the temperature of high-speed bearing 3 is stable within a safe range.

[0065] 5. Abnormal handling: If the temperature continues to exceed T0 and the flow adjustment is ineffective, it is necessary to stop the machine for inspection (it may be due to blockage of the heat conducting element 5, seal leakage or cold medium supply failure).

[0066] 6. Shutdown Procedure: First, stop the motor. After the shaft 102 has completely come to a complete stop, continue circulating the cold medium for 5-10 minutes to ensure that any residual heat from the high-speed bearing 3 is completely dissipated. Sequentially shut down the cold medium supply and medium circulation equipment to prevent the residual medium in the inner tank 401 from heating up due to idling.

[0067] 7. In addition, it also involves the daily maintenance of motor equipment, as follows:

[0068] Check the seals regularly: After each preset running time, check the wear of the inner sealing ring 103, the outer sealing ring 404, and the second sealing rubber ring 406 at the flange, and replace aging parts in time.

[0069] Clean the heat conducting member: After each preset operation time, disassemble the heat conducting member 5 and clean out impurities (such as dust and residual medium scale) in the diverter slot 502 and the spoiler hole 503 to ensure heat dissipation efficiency.

[0070] Calibrate the temperature sensor: Calibrate the temperature sensor readings using a standard thermometer every six months to avoid abnormal heat dissipation caused by errors.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An output bearing heat dissipation type high-speed motor device, comprising a housing (1), a heat dissipation end cover (101) on the output side of the housing, and a rotating shaft (102) passing through the heat dissipation end cover (101), characterized in that: An end cover (4) is fixedly mounted on the outside of the heat dissipation end cover (101), the end cover (4) comprises an inner groove (401), and a positioning ring (2) is mounted on the inner groove (401); A sealing structure is provided between the positioning ring (2) and the wall surface of the inner groove (401) and the outer surface of the heat dissipation end cover (101); a high-speed bearing (3) is fixedly installed on the inner periphery of the positioning ring (2); the rotating shaft (102) movably passes through the positioning ring (2) and the center position of the end cover (4) and is fixedly connected to the inner ring of the high-speed bearing (3); a plurality of heat dissipation column grooves (203) distributed in the radial direction are opened on the ring side of the positioning ring (2); the heat dissipation column grooves (203) penetrate and contact the outer ring surface of the outer ring of the high-speed bearing (3); The end cover (4) is provided with a plurality of screw holes (405) aligned with the heat dissipation column grooves (203) on the annular side, and heat conducting members (5) are installed at the radially aligned screw holes (405) and the heat dissipation column grooves (203); The heat conducting member (5) comprises a metal rod (501), the metal rod (501) being inserted into the inner groove (401) of the end cover (4) and one end of the metal rod (501) being inserted into the heat dissipation column groove (203), the metal rod (501) being provided with a plurality of diversion grooves (502) parallel to the axis of the rod body, and a spoiler hole (503) being provided on the ring side of the metal rod (501) and vertically penetrating the diversion grooves (502); The outer side of the end cover (4) is provided with a cold source end (6) communicating with the bottom area of ​​the inner groove (401) and a heat exhaust end (7) communicating with the top area of ​​the inner groove (401). The end cover (4) is also provided with a temperature sensor (8) inserted into the inner groove (401).

2. The output bearing heat dissipation type high-speed motor device according to claim 1, characterized in that: An inner sealing ring (103) is provided at a position where the rotating shaft (102) passes through the heat dissipation end cover (101); A shaft through hole (403) is provided at the center of the end cover (4), and the rotating shaft (102) passes through the shaft through hole (403) and is provided with an outer sealing ring (404).

3. The output bearing heat dissipation type high-speed motor device according to claim 1, characterized in that: A group of positioning notches (201) are provided on the side edge of the positioning ring (2); An outer limiting convex ring (104) is provided on the outer side of the heat dissipation end cover (101) and matches with a locking notch (201) on one side of the positioning ring (2); The wall surface of the inner groove (401) of the end cover (4) is provided with an inner limiting protrusion (402) that matches the locking notch (201) on the other side of the positioning ring (2).

4. The output bearing heat dissipation type high-speed motor device according to claim 1, characterized in that: The axial width dimension of the high-speed bearing (3) is smaller than the axial width dimension of the positioning ring (2), and a sealing coating (204) is pre-sprayed between the outer ring surface of the outer ring of the high-speed bearing (3) and the inner ring surface of the positioning ring (2).

5. The output bearing heat dissipation type high-speed motor device according to claim 1, characterized in that: The diameter of the metal rod (501) is smaller than the diameter of the heat dissipation column groove (203), and a gap exists between the end side surface of the metal rod (501) inserted into the heat dissipation column groove (203) and the outer ring surface of the outer ring of the high-speed bearing (3).

6. The output bearing heat dissipation type high-speed motor device according to claim 1, characterized in that: The rod body portion of the metal rod (501) inserted into the heat dissipation column groove (203) does not have a spoiler hole (503).

7. The output bearing heat dissipation type high-speed motor device according to claim 1, characterized in that: The metal rod (501) is provided with a threaded portion (504) that is threadedly engaged with the screw hole (405), and the diversion groove (502) provided on the metal rod (501) extends to the threaded portion (504).

8. The output bearing heat dissipation type high-speed motor device according to claim 1, characterized in that: The end cover (4) is connected to the heat dissipation end cover (101) via a flange structure and is provided with a second sealing rubber ring (406).

9. The output bearing heat dissipation type high-speed motor device according to claim 1, characterized in that: The cold source end (6) is connected upstream to a cold medium supply device, and the heat exhaust end (7) is connected downstream to a medium circulation device; The cold medium injected into the inner groove (401) by the cold source end (6) is cooling gas or fluid.

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