Structure of water-cooled motor

Abstract

The utility model discloses a structure of a water-cooled motor, which comprises a motor main body, the motor main body comprises a rotor shaft, the rotor shaft is sequentially sleeved with a rotor iron core and a stator iron core, the stator iron core is sleeved with a cooling sleeve, the cooling sleeve is sleeved with a casing, the cooling sleeve is wound with a spiral water tank, and the casing is sleeved with a water outlet. A water inlet connector and a water outlet connector are arranged at the positions, corresponding to the two ends of the spiral water tank, of the machine shell, the water inlet connector and the water outlet connector both penetrate through the machine shell to be communicated with the spiral water tank in a sealed mode, and the two ends of the machine shell are detachably and fixedly connected with a front end cover and a rear end cover respectively. The rotor shaft passes through the front end cover and the rear end cover. According to the utility model, the cooling sleeve is arranged between the stator core and the casing, and the spiral water tank for circulating the cooling liquid is arranged on the cooling sleeve, so that the heat generated by the motor is quickly taken away from the interior of the motor through the flowing of the cooling medium in the spiral water tank.

Description

Technical Field

[0001] The utility model relates to the technical field of motor cooling, in particular to the structure of a water-cooled motor. Background Art

[0002] Forced air-cooled motors are cooled by fans or air ducts. The fan effect of air-cooled motors is greatly affected by the external environment temperature and humidity. The heat dissipation effect of the motor will vary under different environmental conditions. Under extreme conditions, the heat dissipation efficiency of the motor will affect the performance and life of the motor. Air-cooled motors need to be cooled by fans. The operation of the fans will also generate a lot of noise, which will cause certain interference to the surrounding environment. In addition, the heat dissipation radiation surface of air-cooled motors is limited. For larger motors or high power density operation, air cooling may have the problem of insufficient heat dissipation, and other heat dissipation methods need to be considered.

[0003] With the market trend of high precision, high speed, low noise and long life of CNC machine tools, the spindle motors in CNC machine tools are also required to be light weight, high precision, high speed, low noise and long life. Compared with traditional air-cooled motors, water-cooled motors have the advantages of better heat dissipation, lower noise and more stable operation.

[0004] There are two commonly used water-cooled motor structures. One is a cast shell, in which the water channel is placed inside the shell and cast as a whole. This method is complex and costly. The other is extrusion molding, in which the axial water channel placed on the shell is stretched and formed by an extrusion die. Later, the two ends of the water channel are connected and blocked by welding to form a return circulation water channel. This method has high requirements for welding technology and is difficult to control in quality. In addition, the shell is easily deformed by heat.

[0005] Therefore, in order to solve the above problems, the present application proposes a water-cooled motor structure with simple process, which solves the problems that the motor is greatly affected by the environment, has low heat dissipation efficiency and high noise. Utility Model Content

[0006] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To achieve the above-mentioned purpose, the utility model proposes a structure of a water-cooled motor, including a motor body, the motor body including a rotor shaft, the outer side of the rotor shaft is sequentially sleeved with a rotor core and a stator core, the outer sleeve of the stator core is provided with a cooling jacket, the outer sleeve of the cooling jacket is provided with a casing, a spiral water groove is arranged on the cooling jacket, and water inlet joints and water outlet joints are arranged on the casing corresponding to the two ends of the spiral water groove, the water inlet joint and the water outlet joint are both arranged through the casing and sealed and connected with the spiral water groove, the two ends of the casing are respectively detachably and fixedly connected with a front end cover and a rear end cover, and the rotor shaft is arranged through the front end cover and the rear end cover.

[0008] The utility model arranges a cooling jacket between the stator core and the casing, and provides a spiral water groove for circulating coolant on the cooling jacket. The heat generated by the motor is quickly taken away from the inside of the motor through the flow of cooling medium in the spiral water groove.

[0009] Optionally, the spiral water groove includes a spiral groove and two annular grooves arranged at both ends of the spiral groove, the annular grooves are connected to the spiral groove, and the water outlet joint and the water inlet joint are connected to the two annular grooves respectively.

[0010] Furthermore, the cooling jacket and the casing are arranged with clearance fit, and the casing and the cooling jacket are detachably fixedly connected by fastening screws.

[0011] Furthermore, the stator core and the cooling sleeve are arranged in an interference fit.

[0012] Furthermore, a plurality of sealing grooves are provided at both ends of the cooling shell corresponding to the spiral water groove, and a sealing ring is provided in each of the sealing grooves.

[0013] Furthermore, two or more sealing grooves are provided at each end of the spiral water groove.

[0014] Furthermore, a stepped hole is arranged on the inner wall of the cooling jacket to cooperate with the positioning of the stator core.

[0015] Furthermore, the rotor core is arranged with an interference fit with the rotor shaft, and both ends of the rotor shaft extend out of the front end cover and the rear end cover, and the front end cover and the rear end cover are both provided with bearing assemblies for the rotor shaft to pass through.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0018] Figure 1 It is a schematic diagram of the internal structure of a water-cooled motor according to the utility model;

[0019] Figure 2 It is a schematic diagram of the cooling jacket structure of a water-cooled motor according to the utility model;

[0020] Figure 3 The utility model is a schematic diagram of the external structure of a casing of a water-cooled motor.

[0021] Description of reference numerals:

[0022] 100, motor body; 200, rotor shaft; 300, rotor core; 400, stator core; 500, cooling jacket; 600, housing; 700, spiral water groove; 701, spiral groove; 702, ring groove; 800, water inlet joint; 900, water outlet joint; 1000, front cover; 1100, rear cover; 1200, fastening screw; 1300, sealing groove; 1400, sealing ring; 1500, fastening screw; 1600, bearing assembly; 1700, water inlet threaded hole; 1800, water outlet threaded hole. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0024] The utility model provides a water-cooled motor structure, as shown below Figures 1 to 3 Elaborate in detail.

[0025] A structure of a water-cooled motor, comprising a motor body 100, the motor body 100 comprising a rotor shaft 200, the outer side of the rotor shaft 200 being sequentially sleeved with a rotor core 300 and a stator core 400, the stator core 400 being sleeved with a cooling jacket 500, the cooling jacket 500 being sleeved with a casing 600, the cooling jacket 500 being sleeved with a spiral water trough 700, the casing 600 being provided with a water inlet joint 800 and a water outlet joint 900 at both ends of the spiral water trough 700, the casing 600 being provided with a corresponding water outlet joint 900 and a water inlet joint 800 is provided with a water outlet threaded hole 1800 and a water inlet threaded hole 1700 in a one-to-one correspondence, so that the water outlet joint 900 is conveniently screwed into the water outlet threaded hole 1800, and the water inlet joint 800 is screwed into the water inlet threaded hole 1700. The water inlet joint 800 and the water outlet joint 900 are both passed through the casing 600 and are sealed and connected to the spiral water groove 700. The two ends of the casing 600 are respectively detachably fixedly connected with a front end cover 1000 and a rear end cover 1100, and the rotor shaft 200 is set through the front end cover 1000 and the rear end cover 1100.

[0026] The cooling jacket 500 is arranged between the stator core 400 and the casing 600, and can quickly take away the heat generated inside the motor. The arrangement of the spiral water groove 700 can increase the contact area between the cooling medium and the motor, so that the cooling medium can better and faster take the heat generated by the motor away from the inside of the motor. The arrangement of the water outlet joint 900 and the water inlet joint 800 can facilitate the staff to circulate the cooling medium, so that the cooling medium can further quickly take the heat away from the inside of the motor, and in the external environment, the cooling medium enters the spiral water groove 700 again for the next round of heat dissipation after cooling and heat dissipation. The utility model arranges the cooling jacket 500 between the stator core 400 and the casing 600, and opens a spiral water groove 700 on the cooling jacket 500 for the circulation of coolant. The heat generated by the motor is quickly taken away from the inside of the motor through the flow of the cooling medium in the spiral water groove 700.

[0027] In some embodiments, the spiral water groove 700 includes a spiral groove 701 and two annular grooves 702 disposed at both ends of the spiral groove 701, the annular grooves 702 are disposed in communication with the spiral groove 701, and the water outlet connector 900 and the water inlet connector 800 are disposed in communication with the two annular grooves 702. The arrangement of the spiral groove 701 and the annular groove 702 is, firstly, to facilitate the tool withdrawal when machining the spiral groove 701, and secondly, to facilitate alignment with the water inlet connector 800 and the water storage connector on the housing 600, and the two annular grooves 702 are disposed in correspondence with the water inlet connector 800 and the water outlet connector 900.

[0028] In some embodiments, the cooling jacket 500 and the housing 600 are provided with clearance fit, and the housing 600 and the cooling jacket 500 are detachably fixedly connected by fastening screws 15001200. The cooling jacket 500 and the housing 600 are provided with clearance fit, which is easy to install, and the axial position of the assembly is determined by the tooling.

[0029] In some embodiments, the stator core 400 is interference-fitted with the cooling jacket 500. The stator is interference-fitted inside the cooling jacket 500, and the cooling jacket 500 and the housing 600 are positioned and stopped by tightening screws 15001200 after being assembled at a predetermined position.

[0030] In some embodiments, a plurality of sealing grooves 1300 are provided at both ends of the cooling shell corresponding to the spiral water groove 700, and a sealing ring 1400 is provided in each of the sealing grooves 1300. The provision of the sealing grooves 1300 and the sealing ring 1400 can effectively prevent the cooling medium from flowing out of the spiral water groove 700 and overflowing from the gap between the housing 600 and the cooling jacket 500 into the stator core 400, thereby avoiding safety accidents.

[0031] In some embodiments, two or more sealing grooves 1300 are provided at each end of the spiral water groove 700. The provision of multiple sealing grooves 1300 can further enhance the sealing effect and further avoid safety accidents.

[0032] In some embodiments, the inner wall of the cooling jacket 500 is provided with a stepped hole to match the positioning of the stator core 400. The provision of the stepped hole can facilitate the positioning of the stator core 400 when installing the stator core 400.

[0033] In some embodiments, the rotor core 300 is arranged with an interference fit with the rotor shaft 200, and both ends of the rotor shaft 200 extend out of the front cover 1000 and the rear cover 1100, and the front cover 1000 and the rear cover 1100 are both provided with a bearing assembly 1600 for the rotor shaft 200 to pass through. The arrangement of the bearing assembly 1600 can reduce the friction loss generated by the rotor shaft 200 during the rotation process, play a role in protecting the rotor shaft 200, and at the same time can reduce the energy loss caused by friction, so that the rotor shaft 200 can rotate faster during the rotation process.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A water-cooled motor structure, characterized in that: The motor body comprises a motor body, the motor body comprises a rotor shaft, a rotor core and a stator core are sequentially sleeved on the outer side of the rotor shaft, a cooling jacket is provided outside the stator core, a casing is provided outside the cooling jacket, a spiral water trough is arranged on the cooling jacket, a water inlet joint and a water outlet joint are arranged on the casing at two ends corresponding to the spiral water trough, the water inlet joint and the water outlet joint are both arranged through the casing and sealedly connected with the spiral water trough, a front end cover and a rear end cover are respectively detachably and fixedly connected at two ends of the casing, and the rotor shaft is arranged through the front end cover and the rear end cover.

2. The structure of a water-cooled motor according to claim 1, characterized in that: The spiral water groove comprises a spiral groove and two annular grooves arranged at both ends of the spiral groove, the annular grooves are connected to the spiral groove, and the water outlet joint and the water inlet joint are connected to the two annular grooves respectively.

3. The structure of a water-cooled motor according to claim 1, characterized in that: The cooling jacket and the casing are arranged with clearance fit, and the casing and the cooling jacket are detachably fixedly connected by fastening screws.

4. The structure of a water-cooled motor according to claim 1, characterized in that: The stator core and the cooling sleeve are arranged in an interference fit.

5. The structure of a water-cooled motor according to claim 1, characterized in that: A plurality of sealing grooves are arranged at both ends of the cooling jacket corresponding to the spiral water groove, and a sealing ring is arranged in each of the sealing grooves.

6. The structure of a water-cooled motor according to claim 5, characterized in that: Two or more sealing grooves are provided at each end of the spiral water groove.

7. The structure of a water-cooled motor according to claim 4, characterized in that: The inner wall of the cooling jacket is provided with a stepped hole to cooperate with the stator core for positioning.

8. The structure of a water-cooled motor according to claim 1, characterized in that: The rotor core is arranged with interference fit on the rotor shaft, and two ends of the rotor shaft extend out of the front end cover and the rear end cover. The front end cover and the rear end cover are both provided with bearing assemblies for the rotor shaft to pass through.

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