Water-cooled motor

Abstract

The utility model provides a water-cooled motor, and belongs to the technical field of motors. The problem that an existing motor is loose in structure is solved. The water-cooled motor comprises a machine barrel, a front end cover and a rear end cover, a hollow rotor shaft is horizontally arranged in the machine barrel, the two ends of the rotor shaft penetrate through the front end cover and the rear end cover respectively, the front end and the rear end of the rotor shaft are open and closed respectively, a sleeve is integrally formed on the rear end cover, and the machine barrel is sleeved with the sleeve. An annular cavity is formed among the sleeve, the rear end cover and the machine barrel, a water inlet is formed in the side wall of the front end of the sleeve, and a water outlet axially penetrates through the rear end cover; the outer wall of the rear end of the rotor shaft is provided with an annular groove; the bottom wall of the annular groove is provided with a water guide hole for communicating the inner hole of the rotor shaft with the annular groove; the rear end of the rotor shaft is further sleeved with a water guide ring, the water guide ring is fixedly connected with the rear end cover, sealing is formed between the inner side walls of the two ends of the water guide ring and the rotor shaft, a water inlet penetrates through the middle of the water guide ring, and the water inlet is communicated with the water outlet through a pipe fitting. The water-cooled motor is compact in structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors and relates to a water-cooled motor. Background Art

[0002] A water-cooled motor is an electromagnetic device used to convert mechanical energy into electrical energy, and it adopts water-cooling technology to improve the operating efficiency and stability of the motor.

[0003] The existing water-cooled motors, such as a water-cooled motor (application number: 202222790251.7) disclosed in the Chinese Patent Database, include a machine shell and a rotor shaft horizontally arranged inside the machine shell. Both ends of the rotor shaft extend out of the machine shell, and one end of the rotor shaft is the output end. A cylinder is sleeved outside the machine shell, and both ends of the cylinder are hermetically fixed to the machine shell. An annular cavity coaxial with the machine shell is formed between the cylinder and the machine shell. An inlet and an outlet are respectively arranged at both ends of the cylinder. The inlet and the outlet are both communicated with the above annular cavity, and the inlet is between the outlet and the output end; the rotor shaft is hollow and both ends are open; a rotary joint is arranged at the other end of the rotor shaft. The rotary joint includes a water inlet end and a water outlet end that are relatively rotatably arranged. The water outlet end is fixedly connected to the rotor shaft and the inner cavities of both are communicated. The water inlet end is communicated with the above outlet through a pipeline.

[0004] In the above water-cooled motor, the pipeline connection span is large, which not only makes the whole motor structure relatively loose, occupies a large space, but also the pipeline is easily loosened by collision, resulting in water leakage. Summary of the Utility Model

[0005] The purpose of the utility model is to propose a water-cooled motor with a compact structure and stable operation in view of the above problems existing in the prior art.

[0006] The purpose of the utility model can be achieved by the following technical solutions: A water-cooled motor includes a cylinder barrel, a front end cover and a rear end cover respectively fixed at both ends of the cylinder barrel. A hollow rotor shaft is horizontally arranged inside the cylinder barrel. Both ends of the rotor shaft respectively pass through the front end cover and the rear end cover, and the front end and the rear end of the rotor shaft are respectively open and closed. The characteristic is that a sleeve is integrally formed on the rear end cover. The sleeve is sleeved outside the cylinder barrel. An annular cavity coaxial with the cylinder barrel and in a closed state is formed among the sleeve, the rear end cover and the cylinder barrel. A water inlet for communicating the front end of the annular cavity with the outside is arranged on the side wall of the front end of the sleeve. An axial drainage port for communicating the rear end of the annular cavity with the outside penetrates through the rear end cover; an annular groove coaxial with the rotor shaft is formed on the outer wall of the rear end of the rotor shaft. A water guiding hole for communicating the inner hole of the rotor shaft with the annular groove is arranged on the bottom wall of the annular groove; A water guiding ring is also sleeved on the rear end of the rotor shaft. The water guiding ring is fixedly connected to the rear end cover. Seals are respectively formed between the inner side walls at both ends of the water guiding ring and the outer side wall of the rotor shaft. A water inlet hole communicating with the annular groove radially penetrates through the middle of the water guiding ring, and the water inlet hole and the drainage port are connected through a pipe fitting.

[0007] During use, the cooling water is introduced into the annular cavity from the water inlet, then enters the annular groove through the drain port and the pipe fitting, and then enters the inner hole of the rotor shaft through the water guide holes, and finally sprays out from the front end of the rotor shaft.

[0008] With the cooperation of the water guide ring, the annular groove and the water guide holes, water enters one side of the rotor shaft, and the drain port is axially extended. In actual design, the pipe fitting can be completely arranged between the front end cover and the water guide ring, which can not only reduce the distance between components, make the overall structure more compact, reduce space occupation, but also greatly reduce the probability of the pipe fitting being collided, ensuring the stable operation of the motor.

[0009] In the above-mentioned water-cooled motor, annular installation grooves are provided on the inner side wall of the water guide ring. There are two installation grooves and they are distributed along the axial direction of the rotor shaft. Sealing rings I are provided in both installation grooves, and the inner side walls of both sealing rings I are in contact with the outer wall of the rotor shaft for sealing, and the water inlet holes are located between the two sealing rings I. Under the action of the sealing ring I, the sealing performance formed between the rotor shaft and the water guide ring can be effectively enhanced, ensuring that water is smoothly and stably introduced into the annular groove through the water guide holes, and further enhancing the operation stability of the motor.

[0010] In the above-mentioned water-cooled motor, the rear end cover has a central hole for the rear end of the rotor shaft to pass through. A ring portion matching the central hole is formed on the front end face of the water guide ring, and the ring portion is inserted into the central hole to pre-connect the water guide ring and the rear end cover, facilitating assembly.

[0011] In the above-mentioned water-cooled motor, a bearing for forming a rotational fit between the rotor shaft and the rear end cover is provided in the central hole. The bearing includes an inner ring and an outer ring fixedly connected to the rotor shaft and the rear end cover respectively. There is at least one bearing, and the ring portion presses on the rear end face of the outermost outer ring. The ring portion is used for both guiding the installation of the water guide ring and axially limiting the bearing. That is, in this application, the ring portion has a dual function, simplifying the structure and further facilitating assembly.

[0012] In the above-mentioned water-cooled motor, an annular positioning groove is provided on the outer wall of the front end of the cylinder barrel. The positioning groove and the cylinder barrel are coaxially arranged. A sealing ring II is provided in the positioning groove, and the outer side wall of the sealing ring II is in contact with the inner side wall of the sleeve for sealing, and the water inlet is arranged at the rear side of the sealing ring II. Setting the sealing ring II for forming a seal between the sleeve and the cylinder barrel in front of the water inlet can prevent the cooling water from leaking forward, further ensuring the stable operation of the motor.

[0013] In the above-mentioned water-cooled motor, a spiral groove coaxial with the cylinder barrel is also provided on the outer wall of the cylinder barrel, and the above-mentioned water inlet is arranged opposite to the front end of the spiral groove. Setting the spiral groove can effectively increase the contact area between the cooling water and the cylinder barrel, improving the cooling effect.

[0014] In the above water-cooled motor, the rear end face of the barrel presses against the front end face of the rear end cover. The rear end cover is fixedly connected to the barrel by a circle of screws, and the axes of the screws and the barrel are parallel to each other. An annular placement groove is formed on the rear end face of the barrel, and an annular gasket is arranged in the placement groove. Both end faces of the annular gasket tightly press against the rear end cover and the bottom wall of the placement groove respectively, and the screws are located inside the annular gasket.

[0015] In the above water-cooled motor, the pipe fitting is L-shaped, and both ends of the pipe fitting are respectively communicated with the above-mentioned drain port and the water inlet hole.

[0016] Compared with the prior art, the present water-cooled motor has the following advantages:

[0017] 1. With the cooperation of the water guide ring, the annular groove and the water guide hole, water enters on one side of the rotor shaft, and the drain port is axially extended. In this way, in actual design, the pipe fitting can be completely arranged between the front end cover and the water guide ring, which can not only reduce the distance between various components, make the overall structure more compact, reduce space occupation, but also greatly reduce the probability of the pipe fitting being collided, ensuring the stable operation of the motor.

[0018] 2. The ring part is used for both guiding the installation of the water guide ring and axially limiting the bearing. That is, in the present application, the ring part has a dual function, which simplifies the structure and further facilitates assembly while simplifying the structure. Description of the Drawings

[0019] Figure 1 is a schematic cross-sectional view of the present water-cooled motor.

[0020] Figure 2 is Figure 1 an enlarged schematic view of part A in

[0021] Figure 3 is Figure 1 an enlarged schematic view of part B in

[0022] In the figure, 1. Barrel; 1a. Spiral groove; 2. Front end cover; 3. Rear end cover; 3a. Sleeve; 3a1. Water inlet; 3b. Drain port; 4. Rotor shaft; 4a. Annular groove; 4b. Water guide hole; 5. Annular cavity; 6. Water guide ring; 6a. Water inlet hole; 6b. Ring part; 7. Pipe fitting; 8. Seal ring one; 9. Seal ring two; 10. Annular gasket; 11. Bearing. Detailed Embodiments

[0023] The following are specific embodiments of the present invention and in combination with the drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0024] Such as Figure 1As shown in the figure, this water-cooled motor includes a cylinder 1, a front end cover 2 and a rear end cover 3 which are respectively fixed at both ends of the cylinder 1. In the actual product, the two end faces of the cylinder 1 are respectively pressed against the rear end face of the front end cover 2 and the front end face of the rear end cover 3. The front end cover 2 and the rear end cover 3 are both fixedly connected to the cylinder 1 by a circle of screws, and the axes of the screws and the cylinder 1 are parallel to each other.

[0025] Specifically,

[0026] A stator assembly and a rotor assembly are provided inside the cylinder 1, and both the stator assembly and the rotor assembly are of existing structures and will not be elaborated here. Among them, the rotor assembly includes a hollow rotor shaft 4. The front and rear ends of the rotor shaft 4 respectively pass through the front end cover 2 and the rear end cover 3, and the front and rear ends of the rotor shaft 4 are respectively open and closed.

[0027] As Figure 1 and Figure 2 shown, a sleeve 3a is integrally formed on the rear end cover 3. The sleeve 3a and the cylinder 1 are coaxially arranged. The sleeve 3a is sleeved outside the cylinder 1. An annular cavity 5 which is coaxially arranged with the cylinder 1 and is in a closed state is formed among the sleeve 3a, the rear end cover 3 and the cylinder 1. A water inlet 3a1 for communicating the front end of the annular cavity 5 with the outside is provided on the front side wall of the sleeve 3a. A drain port 3b for communicating the rear end of the annular cavity 5 with the outside axially penetrates through the rear end cover 3. An annular groove 4a coaxial with the rotor shaft 4 is formed on the outer wall of the rear end of the rotor shaft 4. A water guide hole 4b for communicating the inner hole of the rotor shaft 4 with the annular groove 4a is provided on the bottom wall of the annular groove 4a. A water guide ring 6 is also sleeved on the rear end of the rotor shaft 4. The water guide ring 6 is fixedly connected to the rear end cover 3. Seals are formed between the inner side walls at both ends of the water guide ring 6 and the outer side wall of the rotor shaft 4. A water inlet hole 6a communicating with the annular groove 4a radially penetrates through the middle of the water guide ring 6, and the water inlet hole 6a and the drain port 3b are communicated through a pipe fitting 7. Preferably, the water guide hole 4b is in the shape of a straight hole, and there are multiple water guide holes 4b which are evenly distributed along the circumferential direction of the rotor shaft 4.

[0028] During use, cooling water is introduced into the annular cavity 5 from the water inlet 3a1, then is introduced into the annular groove 4a through the drain port 3b and the pipe fitting 7, then enters the inner hole of the rotor shaft 4 through the water guide hole 4b, and finally sprays out from the front end of the rotor shaft 4.

[0029] With the cooperation of the water guide ring 6, the annular groove 4a and the water guide hole 4b, water enters one side of the rotor shaft 4, and the drain port 3b is axially extended. In this way, in the actual design, the pipe fitting 7 can be completely arranged between the front end cover 2 and the water guide ring 6. This can not only reduce the distance between each component, make the overall structure more compact, reduce the space occupation, but also greatly reduce the probability of the pipe fitting 7 being collided, ensuring the stable operation of the motor.

[0030] In this embodiment,

[0031] As Figure 2As shown in the figure, the sealing method between the water guide ring 6 and the rotor shaft 4 is as follows: an annular installation groove is formed on the inner side wall of the water guide ring 6, and there are two installation grooves which are distributed along the axial direction of the rotor shaft 4. Sealing rings I 8 are arranged in both installation grooves, and the inner side walls of both sealing rings I 8 are in contact with the outer wall of the rotor shaft 4 for sealing. At this time, the water inlet hole 6a is located between the two sealing rings I 8. Under the action of the sealing rings I 8, the sealing performance formed between the rotor shaft 4 and the water guide ring 6 can be effectively enhanced, ensuring that water is smoothly and stably introduced into the annular groove 4a from the water guide hole 4b, and further enhancing the operating stability of the motor.

[0032] As Figure 2 and Figure 3 shown in the figure, the sealing method at both ends of the annular cavity 5 is as follows: an annular positioning groove is formed on the outer wall of the front end of the cylinder barrel 1, the positioning groove is coaxially arranged with the cylinder barrel 1, a sealing ring II 9 is arranged in the positioning groove, the outer side wall of the sealing ring II 9 is in contact with the inner side wall of the sleeve 3a for sealing, and the water inlet 3a1 is arranged at the rear side of the sealing ring II 9. By arranging the sealing ring II 9 between the sleeve 3a and the cylinder barrel 1 to form a seal in front of the water inlet 3a1, the forward leakage of the cooling water can be prevented, and the stable operation of the motor can be further ensured. An annular placement groove is formed on the rear end face of the cylinder barrel 1, an annular gasket 10 is arranged in the placement groove, both end faces of the annular gasket 10 are tightly pressed against the rear end cover 3 and the bottom wall of the placement groove respectively, and the screws connecting with the rear end cover 3 in this circle are located inside the annular gasket 10.

[0033] The installation method of the pipe fitting 7 is as follows: the pipe fitting 7 is in an L shape, and both ends of the pipe fitting 7 are respectively communicated with the above-mentioned drain port 3b and the water inlet hole 6a. In the actual product, both end faces of the pipe fitting 7 are tightly pressed against the rear end cover 3 and the water guide ring 6 respectively, and both ends of the pipe fitting 7 are fixedly connected with the rear end cover 3 and the water guide ring 6 respectively by welding.

[0034] As Figure 1 and Figure 2 shown in the figure, the rear end cover 3 has a central hole for the rear end of the rotor shaft 4 to pass through. A ring part 6b matching the central hole is formed on the front end face of the water guide ring 6, and the ring part 6b is inserted into the central hole to pre-connect the water guide ring 6 and the rear end cover 3, which is convenient for assembly. Further explanation: a bearing 11 for forming a rotational fit between the rotor shaft 4 and the rear end cover 3 is arranged in the central hole. The type of the bearing 11 is a ball bearing 11. The bearing 11 includes an inner ring and an outer ring which are fixedly connected with the rotor shaft 4 and the rear end cover 3 respectively. There is at least one bearing 11, and the ring part 6b is pressed against the rear end face of the outermost outer ring. The ring part 6b is used for both guiding the installation of the water guide ring 6 and axially limiting the bearing 11. That is, in this application, the ring part 6b has the function of serving two purposes. While simplifying the structure, it further facilitates assembly.

[0035] Preferably, the rear end cover 3 and the water guide ring 6 are fixedly connected by welding.

[0036] In the actual product, a spiral groove 1a coaxial with the barrel 1 is also provided on the outer wall of the barrel 1, and the water inlet 3a1 is arranged opposite to the front end of the spiral groove 1a. The provision of the spiral groove 1a can effectively increase the contact area between the cooling water and the barrel 1 and improve the cooling effect.

[0037] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A water-cooled motor, comprising a barrel (1) and a front end cover (2) and a rear end cover (3) respectively fixed to the two ends of the barrel (1), a hollow rotor shaft (4) being horizontally arranged in the barrel (1), the two ends of the rotor shaft (4) respectively passing through the front end cover (2) and the rear end cover (3), and the front end and the rear end of the rotor shaft (4) are respectively open and closed, characterized in that: A sleeve (3a) is integrally formed on the rear end cover (3), and the sleeve (3a) is sleeved outside the barrel (1). An annular cavity (5) coaxially arranged with the barrel (1) and in a closed shape is formed between the sleeve (3a), the rear end cover (3) and the barrel (1). A water inlet (3a1) is provided on the front end side wall of the sleeve (3a) so that the front end of the annular cavity (5) is connected to the outside. A water outlet (3b) is axially penetrated on the rear end cover (3) so that the rear end of the annular cavity (5) is connected to the outside. A rear end outer wall of the rotor shaft (4) is provided with a water inlet (3a1) which is connected to the rear end of the rotor shaft (4). ) is coaxial with an annular groove (4a), and a water guide hole (4b) is provided on the bottom wall of the annular groove (4a) so that the inner hole of the rotor shaft (4) is connected to the annular groove (4a); a water guide ring (6) is also sleeved on the rear end of the rotor shaft (4), and the water guide ring (6) is fixedly connected to the rear end cover (3), and the inner side walls of both ends of the water guide ring (6) are sealed with the outer side wall of the rotor shaft (4), and a water inlet hole (6a) connected to the annular groove (4a) is radially penetrated in the middle of the water guide ring (6), and the water inlet hole (6a) and the water outlet (3b) are connected through a pipe (7).

2. The water-cooled motor according to claim 1, characterized in that: The inner wall of the water guide ring (6) is provided with an annular installation groove, wherein there are two installation grooves and they are distributed along the axial direction of the rotor shaft (4), and sealing rings (8) are provided in both installation grooves, and the inner walls of the two sealing rings (8) are in contact with the outer wall of the rotor shaft (4) for sealing, and the water inlet hole (6a) is located between the two sealing rings (8).

3. The water-cooled motor according to claim 1 or 2, characterized in that: The rear end cover (3) has a center hole for the rear end of the rotor shaft (4) to pass through, and a ring portion (6b) matching the center hole is formed on the front end surface of the water guide ring (6), and the ring portion (6b) is inserted into the center hole.

4. The water-cooled motor according to claim 3, characterized in that: A bearing (11) is provided in the center hole to form a rotational fit between the rotor shaft (4) and the rear end cover (3). The bearing (11) comprises an inner ring and an outer ring respectively connected to the rotor shaft (4) and the rear end cover (3). There is at least one bearing (11), and the ring portion (6b) is pressed against the rear end surface of the outer ring arranged at the rearmost side.

5. The water-cooled motor according to claim 1, characterized in that: An annular positioning groove is provided on the outer wall of the front end of the barrel (1), the positioning groove and the barrel (1) are coaxially arranged, a sealing ring (9) is arranged in the positioning groove, the outer wall of the sealing ring (9) contacts and seals with the inner wall of the sleeve (3a), and the water inlet (3a1) is arranged at the rear side of the sealing ring (9).

6. The water-cooled motor according to claim 5, characterized in that: A spiral groove (1a) coaxial with the barrel (1) is also provided on the outer wall of the barrel (1), and the water inlet (3a1) is arranged opposite to the front end of the spiral groove (1a).

7. The water-cooled motor according to claim 1, characterized in that: The rear end face of the barrel (1) is pressed against the front end face of the rear end cover (3), and the rear end cover (3) is fixedly connected to the barrel (1) by a circle of screws, and the axes of the screws and the barrel (1) are arranged in parallel; an annular placement groove is provided on the rear end face of the barrel (1), and an annular sealing gasket (10) is arranged in the placement groove, and the two end faces of the annular sealing gasket (10) are respectively pressed against the rear end cover (3) and the bottom wall of the placement groove, and the screws are located on the inner side of the annular sealing gasket (10).

8. The water-cooled motor according to claim 1, characterized in that: The pipe fitting (7) is L-shaped, and two ends of the pipe fitting (7) are respectively connected to the above-mentioned drainage port (3b) and the water inlet hole (6a).

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