Permanent magnet synchronous motor integrated with liquid cooling circulation structure

Abstract

The utility model discloses a permanent magnet synchronous motor integrated with a liquid cooling circulation structure, which comprises a shell, a main shaft, a stator, a rotor, a front end cover, a junction box, a fan, a fan cover and a circulating pump, the main shaft is arranged in the shell, the stator is arranged on the inner wall of the shell, the rotor is arranged on the outer wall of the main shaft, the fan cover is arranged at an opening at the rear end of the shell, and the circulating pump is arranged in the shell. The fan is arranged in the fan cover, the circulating pump is arranged on the outer side of the fan cover, a spiral channel is formed in the shell, a liquid inlet is formed in the side, close to the fan cover, of the outer wall of the shell, a liquid outlet is formed in the side, close to the front end cover, of the outer wall of the shell, and the circulating pump is connected with the liquid inlet through a liquid inlet pipe. According to the utility model, the cooling liquid can be guided into the shell and circularly flows along the interior of the shell, so that heat generated in the working process of the motor is taken away, compared with a traditional single air cooling heat dissipation mode, the heat dissipation structure is not influenced by external environmental factors, and the heat dissipation efficiency of the motor is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor heat dissipation technical field, especially in kind of permanent magnet synchronous motor of integrated liquid cooling circulation structure. BACKGROUND

[0002] Permanent magnet synchronous motor is a kind of synchronous motor using permanent magnet to generate magnetic field, the rotational speed of its rotor is consistent with the current frequency of stator winding. Since motor working process will inevitably generate certain heat, among them, stator winding is the main heat source when permanent magnet synchronous motor operates, when winding temperature rises to the temperature limit specified in motor insulation level, there is the risk of armature winding insulation being destroyed, and then causing motor short circuit, so corresponding heat dissipation measures need to be taken to motor.

[0003] At present, permanent magnet synchronous motor usually adopts fan and fan cover to dissipate heat, and some motors will additionally set other heat dissipation structures to further improve the heat dissipation capacity, for example, the driving permanent magnet synchronous motor with heat dissipation mechanism disclosed in patent CN119543533A, the motor tail part is provided with heat dissipation device, the heat dissipation device includes rear end cover, copper bar, air cooling assembly and natural cooling assembly, static electricity is introduced into base through copper bar to prevent dust accumulation on rear end cover, air flow rate is improved through air cooling assembly to accelerate heat dissipation, and the contact area with air is increased through S-shaped heat dissipation plate of natural cooling assembly, so that better cooling effect is obtained.

[0004] Although the above-mentioned way can also improve the heat dissipation effect of motor to some extent, but after all, there is certain limitation in air cooling heat dissipation, when the ambient temperature is relatively high, the effect of air cooling heat dissipation will be greatly reduced, so it still needs to be improved. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model discloses a kind of permanent magnet synchronous motor of integrated liquid cooling circulation structure, including shell, main shaft, stator, rotor, front end cover, terminal box, fan, fan cover and circulating pump, the main shaft is set in the inside of shell along axial direction, the stator is set on the inner wall of shell along circumference direction, the rotor is coaxially arranged on the outer wall of main shaft and located inside stator, the front end cover is set at the front end opening of shell, the terminal box is set on the top of shell outer wall and is electrically connected with the winding in stator, the fan cover is set at the rear end opening of shell, the fan is set in fan cover and is coaxially connected with main shaft, the circulating pump is set on the outside of fan cover and is coaxially connected with main shaft, the inside of shell is provided with spiral channel, one side of shell outer wall close to fan cover is equipped with liquid inlet, one side of shell outer wall close to front end cover is equipped with liquid outlet, the circulating pump is connected with liquid inlet by liquid inlet pipe.

[0006] Further, the circulating pump is fixed on the outer wall of the fan cover through a bolt assembly, and the driving shaft end of the circulating pump is inserted into the main shaft and connected through a key block.

[0007] Further, the rear end opening of the shell is also provided with a heat-conducting plate, the outer ring of the heat-conducting plate is connected with the inner wall of the shell in a threaded manner, and the inner ring of the heat-conducting plate is rotationally connected with the main shaft through a first bearing.

[0008] Further, the inner ring of the heat-conducting plate and the main shaft are also provided with a sealing end cover.

[0009] Further, the front end cover and the main shaft are provided with a second bearing.

[0010] Further, the stator is provided with a plurality of mounting grooves in the circumferential direction, each of the mounting grooves is provided with a winding, and the outer side of the winding and the inner wall of the mounting groove are filled with a heat-conducting silica gel layer.

[0011] Further, the stator is provided with annular pressing plates at positions corresponding to the two ends of the mounting grooves, and the annular pressing plates are fixed on the two ends of the stator through bolts.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model discloses a spiral channel and the setting of circulating pump can guide the cooling liquid into the shell interior, and make it circulate and flow along the shell interior, thereby taking away the heat (especially the heat of the stator winding) generated in the motor working process, and the heat dissipation structure is not influenced by external environmental factors, and the heat dissipation efficiency of the motor is remarkably improved relative to the traditional single air cooling heat dissipation mode. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed in the embodiments will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can also be obtained according to these drawings without the creative labor of the ordinary skilled in the art.

[0015] Figure 1 It is the overall structure schematic diagram of the utility model;

[0016] Figure 2 It is the axial structure sectional view of the utility model;

[0017] Figure 3 It is Figure 2 It is the local structure enlarged view of A in the middle;

[0018] Figure 4 It is the end face local structure schematic diagram of the stator and winding in the utility model.

[0019] Figure label:

[0020] 1-House, 2-Main shaft, 3-Stator, 4-Rotor, 5-Front end cover, 6-Junction box, 7-Fan, 8-Fan shroud, 9-Circulating pump, 10-Second bearing, 11-Winding, 12-Ventilation port, 13-Bolt assembly, 14-Key block, 15-Heat-conducting plate, 16-First bearing, 17-Sealed end cover, 18-Spiral channel, 19-Liquid inlet, 20-Liquid outlet, 21-Liquid inlet pipe, 22-Mounting groove, 23-Thermoconductive silicone layer, 24-Annular pressure plate, 25-Bolt. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0023] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0024] In the description of the embodiments, unless otherwise expressly specified and limited, the terms "set," "connect," etc., should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or a connection through an intermediate medium, or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] like Figures 1-2 As shown, the permanent magnet synchronous motor with integrated liquid-cooled circulation structure in this embodiment includes a housing 1, a main shaft 2, a stator 3, a rotor 4, a front end cover 5, a junction box 6, a fan 7, a fan shroud 8, and a circulation pump 9.

[0026] The main shaft 2 is arranged axially inside the housing 1, the stator 3 is arranged circumferentially on the inner wall of the housing 1, and the rotor 4 is coaxially arranged on the outer wall of the main shaft 2 and located inside the stator 3.

[0027] The front end cover 5 is arranged at the opening of the front end of the shell 1, and the second bearing 10 is arranged between the front end cover 5 and the main shaft 2. The terminal box 6 is arranged at the top of the outer wall of the shell 1 and is electrically connected with the winding 11 in the stator 3.

[0028] The fan cover 8 is arranged at the opening of the rear end of the shell 1, and a plurality of air vents 12 for ventilation and heat dissipation are arranged on the fan cover 8. The fan 7 is arranged in the fan cover 8 and is coaxially connected with the main shaft 2, and the main shaft 2 can synchronously drive the fan 7 to rotate.

[0029] The circulating pump 9 is arranged outside the fan cover 8 and is coaxially connected with the main shaft 2. Specifically, the circulating pump 9 is fixed on the outer wall of the fan cover 8 through the bolt assembly 13. The driving shaft end of the circulating pump 9 is inserted into the inside of the main shaft 2, and the two are connected through the key block 14, so that the main shaft 2 can synchronously drive the circulating pump 9 to operate. The circulating pump 9 can adopt a water pump structure commonly used in the art, such as a gear pump, a centrifugal pump, and a vane pump.

[0030] The heat conduction plate 15 is also arranged at the opening of the rear end of the shell 1. The outer circle of the heat conduction plate 15 is connected with the inner wall of the shell 1 in a threaded manner. The inner circle of the heat conduction plate 15 is rotationally connected with the main shaft 2 through the first bearing 16. The inner circle of the heat conduction plate 15 and the main shaft 2 are also provided with a sealing end cover 17. The heat conduction plate 15 can be made of copper plate or aluminum plate and other metals with excellent heat conduction performance, which is used to conduct the heat inside the shell 1 and dissipate it through the fan 7.

[0031] The spiral channel 18 is arranged in the inside of the shell 1. The liquid inlet 19 is arranged on one side of the outer wall of the shell 1 close to the fan cover 8. The liquid outlet 20 is arranged on one side of the outer wall of the shell 1 close to the front end cover 5. The circulating pump 9 is connected with the liquid inlet 19 through the liquid inlet pipe 21. The liquid outlet 20 and the inlet of the circulating pump 9 are connected with the liquid supply device (for example, an industrial water chiller). The cooling liquid can be pure water, ethylene glycol solution, or cooling oil.

[0032] When the motor works, the circulating pump 9 is synchronously driven by the main shaft 2 to work. The cooling liquid in the liquid supply device is sent into the spiral channel 18, taking away the heat of the shell 1 and its inside. Then the cooling liquid returns to the liquid supply device through the liquid outlet 20, and then returns to the spiral channel 18 after being cooled and cooled by the liquid supply device, so as to realize the circulation of the cooling liquid. Compared with the traditional single air cooling heat dissipation mode, this heat dissipation mode is not affected by external environmental factors, and the heat dissipation efficiency of the motor is significantly improved.

[0033] As shown in Figures 3-4 The stator 3 is provided with a plurality of installation grooves 22 in the circumferential direction. Each installation groove 22 is provided with a winding 11. The outer side of the winding 11 and the inner wall of the installation groove 22 are filled with a heat-conducting silica gel layer 23. The heat-conducting silica gel layer 23 plays a heat-conducting role on one hand, which can transmit the heat of the winding 11 to the shell 1 through the stator 3. On the other hand, the heat-conducting silica gel layer 23 also plays a sealing and moisture-proof role on the winding 11.

[0034] The two ends of the stator 3 are provided with annular pressing plates 24 corresponding to the mounting grooves 22, the annular pressing plates 24 are fixed on the two ends of the stator 3 through bolts 25, and are used for limiting the winding 11 in the mounting grooves 22.

[0035] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. In addition, the technical solutions of various embodiments can be combined with each other, but must be based on the realization of ordinary technical personnel; when the combination of technical solutions appears contradictory or unachievable, it shall be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.

Claims

1. A permanent magnet synchronous motor with an integrated liquid-cooled circulation structure, characterized in that: The device includes a housing, a main shaft, a stator, a rotor, a front cover, a junction box, a fan, a fan shroud, and a circulating pump. The main shaft is axially disposed inside the housing, the stator is circumferentially disposed on the inner wall of the housing, and the rotor is coaxially disposed on the outer wall of the main shaft and located inside the stator. The front cover is disposed at the front opening of the housing, the junction box is disposed at the top of the outer wall of the housing and electrically connected to the windings inside the stator, the fan shroud is disposed at the rear opening of the housing, the fan is disposed inside the fan shroud and coaxially connected to the main shaft, and the circulating pump is disposed outside the fan shroud and coaxially connected to the main shaft. A spiral channel is provided inside the housing, an inlet is provided on the outer wall of the housing near the fan shroud, and an outlet is provided on the outer wall of the housing near the front cover. The circulating pump is connected to the inlet via an inlet pipe.

2. The permanent magnet synchronous motor with an integrated liquid-cooled circulation structure according to claim 1, characterized in that: The circulation pump is fixed to the outer wall of the shroud by bolt assembly, and the end of the drive shaft of the circulation pump is inserted into the main shaft and the two are connected by a key block.

3. The permanent magnet synchronous motor with integrated liquid-cooled circulation structure according to claim 1, characterized in that: A heat-conducting plate is also provided at the rear opening of the housing. The outer ring of the heat-conducting plate is connected to the inner wall of the housing by a thread, and the inner ring of the heat-conducting plate is rotatably connected to the main shaft through a first bearing.

4. The permanent magnet synchronous motor with integrated liquid-cooled circulation structure according to claim 3, characterized in that: A sealing end cap is also provided between the inner ring of the heat-conducting plate and the main shaft.

5. The permanent magnet synchronous motor with integrated liquid-cooled circulation structure according to claim 1, characterized in that: A second bearing is provided between the front end cover and the main shaft.

6. The permanent magnet synchronous motor with an integrated liquid-cooled circulation structure according to claim 1, characterized in that: The stator has multiple mounting slots along the circumferential direction inside, and each mounting slot has a winding. The space between the outer side of the winding and the inner wall of the mounting slot is filled with a thermally conductive silicone layer.

7. The permanent magnet synchronous motor with an integrated liquid-cooled circulation structure according to claim 6, characterized in that: The stator has annular pressure plates at both ends corresponding to the mounting slots, and the annular pressure plates are fixed to both ends of the stator by bolts.

Images