A plugging tool for testing the oil circuit of an oil-cooled stator core

Abstract

A sealing fixture for testing the oil circuit of an oil-cooled stator core includes at least two plug devices. These plug devices can move inward to form a space for placing the oil-cooled stator core. The joint of the plug devices or one plug device has an air inlet facing an oil inlet hole of the oil-cooled stator core. An airtightness testing device can supply air to the oil-cooled stator core through this air inlet. By driving multiple plug devices to seal from different directions, the overall sealing comprehensiveness and stability are improved. The air inlet formed between two plug devices provides a convenient channel for the introduction of the testing medium, enhancing the device's versatility. The sealing plugs are integrally made of flexible material, possessing good elasticity and deformation capacity, allowing them to tightly fit the outer surface of the core and the oil circuit port. Even with minor surface imperfections, they can effectively seal, reducing the risk of leakage.

Description

Technical Field

[0001] This utility model belongs to the field of oil circuit detection technology for oil-cooled stator cores, specifically relating to a sealing tooling for oil circuit detection of oil-cooled stator cores. Background Technology

[0002] With the continuous development of new energy vehicles and the increasing market demand for their driving capabilities, the motors of new energy vehicles need to continuously improve their speed, torque density, and power density while gradually reducing their size. The higher the motor's speed, torque density, and power density, the more heat it generates. Therefore, the motor's heat dissipation and cooling structure is essential for its reliable, stable, and efficient operation. Currently, motor cooling methods are divided into air cooling, water cooling, and oil cooling. Oil cooling, with its inherent electrical insulation and high degree of structural design freedom, has become the preferred cooling method for high-performance motors.

[0003] In the prior art, the stator core has a very complex oil circuit design in order to fully contact the cooling oil for heat dissipation. It is impossible to confirm whether the oil circuit is unobstructed by visual inspection or by light transmission. Therefore, the use of gas sensing to detect the unobstructedness of the stator core oil circuit has been proposed.

[0004] Therefore, it is crucial to design a plugging fixture for testing the oil circuit of an oil-cooled stator core. Utility Model Content

[0005] The technical problem solved by this utility model is to provide a sealing tool for testing the oil circuit of an oil-cooled stator core.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a sealing fixture for oil circuit detection of oil-cooled stator core, including at least two plug devices, at least two plug devices can move inward to form a space for placing the oil-cooled stator core, and the joint of at least two plug devices or one plug device has an air inlet hole facing an oil inlet hole of the oil-cooled stator core, and the air tightness detection device can supply air to the oil-cooled stator core through the air inlet hole.

[0007] In some embodiments, each of the plug devices includes a mounting base fixed to an airtightness testing device, a cylinder fixed to the mounting base, and a detachable sealing plug disposed at the output end of the cylinder.

[0008] In some embodiments, the inner wall of the sealing plug is arc-shaped, and the outer wall of the sealing plug has multiple planes, wherein a connecting hole is provided in the middle plane, and a connector that matches the connecting hole is fixed to the output end of the cylinder.

[0009] In some embodiments, the plug device has four parts, namely a first plug device, a second plug device, a third plug device and a fourth plug device, with the air inlet formed between the first plug device and the second plug device.

[0010] In some embodiments, the sealing plug is a sealing block integrally made of flexible material.

[0011] In some embodiments, the sealing plug has a raised strip on one side and a groove on the other side that matches the raised strip. All the plug devices are movable inward until the raised strip and the corresponding groove are tightly fitted together, and the inner wall of all the plug devices is in close contact with the outer surface of the oil-cooled stator core.

[0012] In some embodiments, the oil-cooled stator core includes a core body, end face bodies welded to both ends of the core body, and an oil inlet ring sleeved on the core body and welded to the two end face bodies at both ends. The inner diameter of the oil inlet ring is larger than the outer diameter of the core body. An oil passage space is formed between the oil inlet ring and the core body. The oil inlet ring has multiple oil inlet holes, each of which is connected to the oil passage space. Multiple oil outlet holes are evenly provided along the circumferential direction on the two end face bodies, each of which is connected to the oil passage space.

[0013] The scope of this utility model is not limited to technical solutions formed by specific combinations of the above-mentioned technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-mentioned technical features or their equivalent features. For example, technical solutions formed by substituting the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

[0014] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: This utility model provides a plugging fixture for testing the oil circuit of an oil-cooled stator core. The cylinder can be detachably installed on its fixed base, which facilitates flexible disassembly and maintenance according to testing needs, reducing the difficulty and cost of equipment maintenance. The cylinder achieves a stable connection through the connector, ensuring reliable power transmission. The sealing plug driven by the cylinder can accurately connect to the oil circuit port, and achieve efficient sealing with the stable pressure provided by the cylinder, effectively avoiding oil leakage during testing and ensuring testing accuracy. The four plug devices seal from different directions, improving the comprehensiveness and stability of the overall sealing. The air inlet formed between two plug devices provides a convenient channel for the testing medium to enter, enhancing the versatility of the device. The sealing plug is made of flexible material in one piece, with good elasticity and deformation ability, which can tightly fit the outer surface of the core and the oil circuit port. Even if there are minor defects on the surface, it can effectively seal and reduce the risk of leakage. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the oil-cooled stator core structure of this utility model; Figure 2 This is a schematic diagram of the connection structure between the oil inlet ring and the oil outlet hole of this utility model; Figure 3 This is a schematic diagram of the plug device of this utility model; Wherein: 100, oil-cooled stator core; 101, core body; 102, oil inlet ring; 103, oil inlet hole; 104, end face body; 105, oil outlet hole; 200. Plug device; 201. Fixing seat; 202. Cylinder; 203. Connector; 204. Sealing plug. Detailed Implementation

[0016] like Figures 1-3 The diagram shows a plugging fixture for testing the oil circuit of an oil-cooled stator core, comprising an oil-cooled stator core 100 and a plugging device 200, wherein the plugging device 200 is snapped onto the outer surface of the oil-cooled stator core 100.

[0017] The plug device 200 includes a fixed base 201, a cylinder 202 is detachably installed on one side of the fixed base 201, a connector 203 is provided on one side of the cylinder 202, and a sealing plug 204 is fixedly installed on one side of the cylinder 202.

[0018] The plug device 200 is snapped onto the outer surface of the oil-cooled stator core 100, enabling quick assembly with the workpiece to be tested and providing a stable foundation for oil circuit testing. The cylinder 202, which can be detachably installed on one side of the fixed base 201, facilitates flexible disassembly and maintenance according to testing needs, reducing the difficulty and cost of equipment maintenance. The cylinder 202 achieves a stable connection through the connector 203, ensuring the reliability of power transmission. At the same time, the sealing plug 204 driven by it can be connected to the oil circuit port of the oil-cooled stator core 100. The stable pressure provided by the cylinder 202 achieves efficient sealing, effectively preventing oil leakage during testing and ensuring the accuracy of oil circuit testing.

[0019] The inner wall of the sealing plug 204 is arc-shaped, and the outer wall of the sealing plug 204 has multiple planes, among which the middle plane has a connecting hole. The output end of the cylinder 202 is matched and connected with the connector 203. The arc-shaped inner wall can better fit the outer surface of the oil-cooled stator core 100, increase the sealing contact area, and improve the sealing effect. The multiple planes of the outer wall facilitate operation and positioning. The connecting hole of the middle plane can achieve precise docking with the output end of the cylinder 202. With the matching connection of the connector 203, the stability and sealing of the power transmission are guaranteed, avoiding air or oil leakage caused by improper connection, and further improving the reliability of the test.

[0020] like Figure 3As shown, there are four plug devices 200, with two plug devices 200 connected to form an air inlet. The four plug devices 200 can seal the oil-cooled stator core 100 from different directions, improving the comprehensiveness and stability of the overall sealing. The air inlet formed between two plug devices 200 facilitates the introduction of detection medium into the oil circuit space, providing a convenient medium input channel for oil circuit detection. At the same time, the combination of multiple plug devices 200 can adapt to different oil circuit layouts, enhancing the versatility of the device.

[0021] The sealing plug 204 is a sealing block made of flexible material in one piece. The flexible material has good elasticity and deformation ability, which can closely fit the outer surface of the oil-cooled stator core 100 and the oil passage port. Even if there are minor defects on the surface, it can achieve effective sealing and reduce the risk of leakage.

[0022] One side of the sealing plug 204 has a raised strip, and the other side has a groove that matches the raised strip. The sealing plug 204 can be moved inward until the raised strip and the corresponding groove are tightly fitted together. The inner wall of the sealing plug 204 is close to the outer surface of the oil-cooled stator core 100. The tight fit between the raised strip and the groove can form a stable connection between multiple sealing plugs 204, enhancing the integrity and sealing of the overall sealing structure and preventing leakage caused by the loosening of a single plug. The close fit between the inner wall and the outer surface of the oil-cooled stator core 100 further ensures the tightness of the sealing.

[0023] like Figure 1 As shown, the oil-cooled stator core 100 includes a core body 101, an end face body 104, and an oil inlet ring 102. The inner diameter of the oil inlet ring 102 is larger than the outer diameter of the core body 101, forming an oil passage space between the oil inlet ring 102 and the core body 101. Multiple oil inlet holes 103 are provided on the oil inlet ring 102, and these holes are connected to the oil passage space. The end face body 104 is welded to the end face of the core body 101, and multiple oil inlet holes are evenly distributed along the circumference of the end face body 104. Multiple oil outlet holes 105 are connected to the oil passage space. The clear oil passage structure makes the oil passage detection target clear and facilitates the plug device 200 to connect to the corresponding port for detection. The setting of multiple oil inlet holes 103 and oil outlet holes 105 ensures the uniformity of oil flow. The oil passage space formed by the oil inlet ring 102 and the iron core body 101 provides a sufficient channel for oil flow, which helps to comprehensively detect the smoothness and sealing of the oil passage and improves the comprehensiveness and accuracy of the detection.

[0024] Working principle: First, four plug devices 200 are snapped onto the outer surface of the oil-cooled stator core 100. The protrusion on one side of the sealing plug 204 engages with the groove on the other side of the adjacent sealing plug 204, forming a stable connection between the multiple sealing plugs 204. The arc-shaped inner wall of the sealing plug 204 is tightly fitted to the outer surface of the oil-cooled stator core 100. Next, the cylinder 202, detachably mounted on the fixing base 201, is connected to the output end via the connector 203. Under the stable pressure provided by the cylinder 202, the sealing plugs 204 are driven to tightly engage with the oil-cooled stator core 100. At the oil passage port of 0, since the sealing plug 204 is made of flexible material in one piece, it can adapt to minor surface imperfections and achieve efficient sealing. Subsequently, using the air inlet formed by the connection between the two plug devices 200, the detection medium is introduced into the oil passage space between the iron core body 101 and the oil inlet ring 102. The detection medium enters the oil passage space through the oil inlet hole 103 on the oil inlet ring 102, and then flows out through the oil outlet hole 105 on the end face body 104. During this process, the flow of the medium and whether the sealing parts leak are detected by observation or by sensors, thus completing the detection of the smoothness and sealing of the oil passage.

[0025] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A sealing fixture for detecting the oil circuit of an oil-cooled stator core, characterized in that: It includes at least two plug devices (200), at least two of the plug devices (200) can move inward to form a space for placing an oil-cooled stator core (100), and the joint of at least two plug devices (200) or one of the plug devices (200) has an air inlet facing an oil inlet hole of the oil-cooled stator core (100), and the air tightness detection device can supply air to the oil-cooled stator core (100) through the air inlet.

2. The sealing fixture for oil circuit detection of oil-cooled stator cores according to claim 1, characterized in that: Each of the plug devices (200) includes a mounting base (201) fixed to the airtightness testing device, a cylinder (202) fixed to the mounting base (201), and a detachable sealing plug (204) disposed at the output end of the cylinder (202).

3. The sealing fixture for oil circuit detection of oil-cooled stator cores according to claim 2, characterized in that: The inner wall of the sealing plug (204) is arc-shaped, and the outer wall of the sealing plug (204) has multiple planes, among which the middle plane has a connecting hole. The output end of the cylinder (202) is fixed with a connector (203) that matches the connecting hole.

4. The sealing fixture for oil circuit detection of oil-cooled stator cores according to claim 1, characterized in that: The plug device (200) has four parts, namely a first plug device, a second plug device, a third plug device and a fourth plug device, with the air inlet formed between the first plug device and the second plug device.

5. The sealing fixture for oil circuit detection of oil-cooled stator core according to claim 2, characterized in that: The sealing plug (204) is a sealing block made of flexible material in one piece.

6. The sealing fixture for oil circuit detection of oil-cooled stator cores according to claim 5, characterized in that: One side of the sealing plug (204) has a protrusion and the other side has a groove that matches the protrusion. All the plug devices (200) can move inward until the protrusion and the corresponding groove are tightly fitted together. The inner wall of all the plug devices (200) is close to the outer surface of the oil-cooled stator core (100).

7. The sealing fixture for oil circuit detection of oil-cooled stator cores according to claim 1, characterized in that: The oil-cooled stator core (100) includes a core body (101), end face bodies (104) welded to both ends of the core body (101), and an oil inlet ring (102) sleeved on the core body (101) and welded to the two end face bodies (104) at both ends respectively. The inner diameter of the oil inlet ring (102) is larger than the outer diameter of the core body (101). An oil passage space is formed between the oil inlet ring (102) and the core body (101). A plurality of oil inlet holes (103) are opened on the oil inlet ring (102), and each oil inlet hole (103) is connected to the oil passage space. A plurality of oil outlet holes (105) are evenly opened along the circumferential direction on the two end face bodies (104), and each oil outlet hole (105) is connected to the oil passage space.

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