High-temperature motor with cooling device

Abstract

The utility model provides a high-temperature motor with a cooling device, and belongs to the technical field of motors. The high-temperature motor with the cooling device comprises a stator, a rotor, an outer pipe and an inner pipe, the rotor comprises a rotating shaft, the outer pipe is wound in the stator in a penetrating mode, the inner pipe is wound in the rotor in a penetrating mode, a liquid return cover is arranged at the rear end of the stator, a liquid inlet nozzle is arranged on the axis of the liquid return cover, two coaxial channels are formed in the rotating shaft, and the two coaxial channels are communicated with the liquid inlet nozzle. The liquid inlet nozzle is communicated with the inner channel, the liquid return cover is communicated with the outer channel and the outer pipe, and the two ends of the inner pipe are fixedly communicated with the two channels in the rotating shaft respectively. The liquid cooling structure has the following effects: the two coaxial channels in the rotating shaft are respectively communicated with the liquid inlet nozzle and the liquid return cover, so that the outer pipe on the stator can be communicated with the inner pipe on the rotor to form a complete closed cooling channel, and the rotation of the rotor is not influenced during liquid cooling.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to a high-temperature motor with a cooling device. BACKGROUND

[0002] The downhole environment of a stone fluid is extremely harsh, with a very high temperature that can reach 200°C or even higher. Meanwhile, there is high pressure, high humidity, corrosive medium, and strong vibration and impact in the downhole. The motor in such an environment needs to use high-temperature-resistant materials and a cooling device to ensure normal operation. The cooling device usually uses a cooling liquid to circulate into the motor, absorb heat, and then circulate out.

[0003] For example, Chinese Patent Application No. CN202111578359.3 discloses a multi-cooling-flow motor. This scheme mainly uses cooling liquid to be input into the rotating shaft and sprayed out from multiple spray holes to efficiently cool the winding. In the flow process of the cooling liquid, the motor housing, stator, and winding are sequentially cooled. Another part of the cooling liquid continues to flow from the motor housing axial flow channel into the rotor cavity in the middle of the rotor. Then, the cooling liquid flows through the rotor lamination axial flow channel to cool the rotor. Then, the cooling liquid is thrown out from the pressure plate liquid outlet to cool the winding, and finally, the cooling liquid is discharged from the motor housing cooling liquid outlet.

[0004] However, the present inventors have found at least the following technical problems in the above-mentioned technology during the implementation of the technical solutions in the embodiments of the present application.

[0005] Since the rotor is in high-speed rotation, the cooling liquid hits the rotor, affecting the rotation of the rotor. At the same time, since the gap between the rotor and the stator is very small, and the cooling liquid enters this gap, it generates a rotating resistance, which also affects the rotation of the motor. INVENTION CONTENTS

[0006] To make up for the above shortcomings, the present application provides a high-temperature motor with a cooling device, aiming to improve the problems mentioned in the background art.

[0007] The embodiments of the present application provide a high-temperature motor with a cooling device, which includes a stator, a rotor, an outer tube, and an inner tube. The rotor includes a rotating shaft. The outer tube is wound around the stator. The inner tube is wound around the rotor. The rear end of the stator is provided with a liquid return cover. The liquid return cover is provided with a liquid inlet nozzle at the shaft center. Two coaxial channels are formed in the rotating shaft. The liquid inlet nozzle is in communication with the inner channel. The liquid return cover is in communication with the outer channel and the outer tube. The two ends of the inner tube are fixedly communicated with the two channels on the rotating shaft.

[0008] In a specific embodiment, the stator comprises a shell and an outer winding, the outer winding is fixedly connected with the inner wall of the shell, the outer pipe is wound in the outer winding, and the liquid return cover is fixedly connected at the tail end of the shell.

[0009] In the implementation process, the liquid return cover and the liquid inlet nozzle are installed at the rear end of the shell, and the outer pipe absorbs the heat of the outer winding.

[0010] In a specific embodiment, the shell is provided with a liquid outlet nozzle in communication with one end of the outer pipe, and the other end of the outer pipe penetrates the shell and communicates with the liquid return cover.

[0011] In the implementation process, the cooling liquid enters the outer pipe from the liquid return cover, passes through the outer pipe, and then circulates out of the liquid outlet nozzle.

[0012] In a specific embodiment, the rotor further comprises an inner winding, the inner winding is fixedly sleeved on the rotating shaft, and the inner pipe is wound in the inner winding.

[0013] In the implementation process, the cooling liquid enters the inner channel of the rotating shaft, enters the inner pipe from the front end of the rotating shaft, winds in the inner winding, enters the outer channel of the rotating shaft from the rear end of the rotating shaft, and then enters the liquid return cover.

[0014] In a specific embodiment, the rotating shaft is hollow, the tail end of the rotating shaft is provided with a counterbore, a liquid inlet pipe is fixedly inserted into the rotating shaft, the liquid inlet pipe is rotatably connected with the liquid inlet nozzle, and the liquid inlet pipe forms two channels inside and outside.

[0015] In the implementation process, two steps are formed in the rotating shaft by inserting the liquid inlet pipe into the rotating shaft with interference, thereby forming the two channels inside and outside, and the structure is convenient for machining.

[0016] In a specific embodiment, a bearing is arranged between the shell and the rotating shaft.

[0017] In a specific embodiment, a sealing ring A is arranged between the shell and the rotating shaft, and the bearing is located inside the sealing ring A.

[0018] In the implementation process, the bearing is used to support the rotation of the rotor, the sealing ring A is used to prevent the cooling liquid or other liquids in the well from entering the shell, and the sealing ring A can also protect the bearing.

[0019] In a specific embodiment, a sealing ring B is arranged between the liquid inlet nozzle and the liquid inlet pipe.

[0020] In the implementation process, the sealing ring B is used to prevent the liquid in the outer channel of the rotating shaft from overflowing from the gap between the liquid inlet pipe and the liquid inlet nozzle.

[0021] Compared with the prior art, the beneficial effects of this application are: the two coaxial channels inside the rotating shaft are respectively connected to the liquid inlet and the liquid return cover, so that the outer tube on the stator and the inner tube on the rotor can be connected to form a complete closed cooling channel, which will not affect the rotation of the rotor when liquid cooling is performed. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic cross-sectional view of a high-temperature motor with a cooling device provided in an embodiment of this application.

[0024] Figure 2 Provided for the implementation of this application Figure 1 Enlarged view of a portion of point A in the middle;

[0025] Figure 3 A schematic diagram of the external view of a high-temperature motor with a cooling device provided for an embodiment of this application;

[0026] Figure 4 A schematic diagram illustrating the connection relationship between the inner tube and the rotating shaft provided for an embodiment of this application;

[0027] Figure 5 A schematic diagram showing the connection relationship between the outer tube and the return fluid cover provided for an embodiment of this application.

[0028] In the diagram: 10-Stator; 11-Housing; 12-Outer winding; 13-Sealing ring A; 20-Rotor; 21-Shaft; 22-Inner winding; 23-Inlet pipe; 24-Bearing; 30-Outer tube; 40-Inner tube; 50-Return cover; 60-Inlet nozzle; 70-Outlet nozzle; 80-Sealing ring B. Detailed Implementation

[0029] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0030] Please see Figures 1-5This application provides a high-temperature motor with a cooling device, including a stator 10, a rotor 20, an outer tube 30, and an inner tube 40. The rotor 20 includes a rotating shaft 21. The outer tube 30 is wound inside the stator 10, and the inner tube 40 is wound inside the rotor 20. A liquid return cover 50 is provided at the rear end of the stator 10, and a liquid inlet 60 is provided on the axis of the liquid return cover 50. Two coaxial channels are opened in the rotating shaft 21. The liquid inlet 60 communicates with the inner channel, and the liquid return cover 50 communicates with the outer channel and the outer tube 30. Both ends of the inner tube 40 are fixedly connected to the two channels on the rotating shaft 21, respectively. The two coaxial channels in the rotating shaft 21 are respectively connected to the liquid inlet 60 and the liquid return cover 50, so that the outer tube 30 on the stator 10 and the inner tube 40 on the rotor 20 can be connected to form a complete closed cooling channel, which does not affect the rotation of the rotor 20 when liquid cooling is performed.

[0031] Please see Figures 1-5 The stator 10 includes a housing 11 and an outer winding 12. The outer winding 12 is fixedly connected to the inner wall of the housing 11. An outer tube 30 is wound inside the outer winding 12. A return liquid cover 50 is fixedly connected to the tail end of the housing 11. The return liquid cover 50 and the liquid inlet 60 are installed at the rear end of the housing 11. The outer tube 30 absorbs the heat of the outer winding 12.

[0032] Please see Figures 1-5 The outer casing 11 is provided with a liquid outlet 70, which is connected to one end of the outer tube 30. The other end of the outer tube 30 passes through the outer casing 11 and is connected to the return cover 50. The coolant enters the outer tube 30 from the return cover 50, passes through the outer tube 30, and then circulates out from the liquid outlet 70.

[0033] Please see Figures 1-5 The rotor 20 also includes an inner winding 22, which is fixedly sleeved on the shaft 21, and the inner tube 40 is wound inside the inner winding 22. After the coolant enters the inner channel of the shaft 21, it enters the inner tube 40 from the front end of the shaft 21, winds through the inner winding 22, enters the outer channel of the shaft 21 from the rear end of the shaft 21, and then enters the return cover 50.

[0034] Please see Figures 1-5 The rotating shaft 21 is hollow, and a countersunk hole is provided at the tail end of the rotating shaft 21. An inlet pipe 23 is fixedly inserted into the rotating shaft 21, and the inlet pipe 23 is rotatably connected to the inlet nozzle 60, forming two channels inside and outside the inlet pipe 23. Two steps are provided inside the rotating shaft 21. By inserting the inlet pipe 23 into the rotating shaft 21 with an interference fit, two channels are formed, which facilitates processing.

[0035] Please see Figures 1-5A bearing 24 is provided between the housing 11 and the rotating shaft 21. A sealing ring A13 is provided between the housing 11 and the rotating shaft 21, and the bearing 24 is located inside the sealing ring A13. The bearing 24 is used to support the rotation of the rotor 20, while the sealing ring A13 is used to prevent coolant or other liquids from the well from entering the housing 11, and the sealing ring A13 also protects the bearing 24.

[0036] Please see Figures 1-5 A sealing ring B80 is provided between the inlet nozzle 60 and the inlet pipe 23. The sealing ring B80 is used to prevent liquid from the outer channel of the rotating shaft 21 from overflowing from the gap between the inlet pipe 23 and the inlet nozzle 60.

[0037] The working principle of this high-temperature motor with cooling device is as follows: Two steps are opened inside the rotating shaft 21. The liquid inlet pipe 23 is inserted into the rotating shaft 21 with an interference fit, thus forming two channels, inner and outer. The coolant enters from the liquid inlet 60 and is guided by the liquid inlet pipe 23 to the inner channel of the rotating shaft 21. It is then transported to the front end of the rotating shaft 21 and enters the inner tube 40. After passing through the inner winding 22, the coolant carries away the heat. Then, it enters the outer channel from the rear end of the rotating shaft 21, then enters the return cover 50, and then enters the outer tube 30. After passing through the outer winding 12, it circulates from the liquid outlet 70. The coolant is discharged outwards, so both the stator 10 and the rotor 20 are cooled, and the coolant will not enter between the rotor 20 and the stator 10, thus not affecting the rotation. Since there is no need to use gravity to collect the splashed coolant, the limitation on the motor's operating posture is eliminated. In summary, the two coaxial channels inside the rotating shaft 21 are connected to the inlet 60 and the return cover 50, respectively, so that the outer tube 30 on the stator 10 and the inner tube 40 on the rotor 20 can be connected to form a complete closed cooling channel, which will not affect the rotation of the rotor 20 when liquid cooling is performed.

[0038] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, improvements, or equivalent substitutions made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

Claims

1. A high-temperature motor with a cooling device, characterized in that, The device includes a stator (10), a rotor (20), an outer tube (30), and an inner tube (40). The rotor (20) includes a rotating shaft (21). The outer tube (30) is wound inside the stator (10), and the inner tube (40) is wound inside the rotor (20). A return liquid cover (50) is provided at the rear end of the stator (10). A liquid inlet (60) is provided on the axis of the return liquid cover (50). Two coaxial channels are opened inside the rotating shaft (21). The liquid inlet (60) is connected to the inner channel. The return liquid cover (50) is connected to the outer channel and the outer tube (30). The two ends of the inner tube (40) are fixedly connected to the two channels on the rotating shaft (21).

2. A high-temperature motor with a cooling device according to claim 1, characterized in that, The stator (10) includes a housing (11) and an outer winding (12). The outer winding (12) is fixedly connected to the inner wall of the housing (11). The outer tube (30) is wound inside the outer winding (12). The return liquid cover (50) is fixedly connected to the tail end of the housing (11).

3. A high-temperature motor with a cooling device according to claim 2, characterized in that, The outer shell (11) is provided with a liquid outlet (70) which is connected to one end of the outer tube (30), and the other end of the outer tube (30) passes through the outer shell (11) and is connected to the return liquid cover (50).

4. A high-temperature motor with a cooling device according to claim 3, characterized in that, The rotor (20) also includes an inner winding (22), which is fixedly sleeved on the rotating shaft (21), and the inner tube (40) is wound inside the inner winding (22).

5. A high-temperature motor with a cooling device according to claim 4, characterized in that, The rotating shaft (21) is hollow and has a countersunk hole at its tail end. An inlet pipe (23) is fixedly inserted into the rotating shaft (21). The inlet pipe (23) is rotatably connected to the inlet nozzle (60). The inlet pipe (23) forms two channels inside and outside.

6. A high-temperature motor with a cooling device according to claim 5, characterized in that, A bearing (24) is provided between the outer casing (11) and the rotating shaft (21).

7. A high-temperature motor with a cooling device according to claim 6, characterized in that, A sealing ring A (13) is provided between the outer shell (11) and the rotating shaft (21), and the bearing (24) is located inside the sealing ring A (13).

8. A high-temperature motor with a cooling device according to claim 7, characterized in that, A sealing ring B (80) is provided between the liquid inlet (60) and the liquid inlet pipe (23).

Images