A wide-temperature-range pressure resistance testing device for aviation lubricating oil

Abstract

This utility model relates to the field of aerospace testing technology and discloses a wide-temperature-range pressure resistance testing device for aviation lubricating oil. It includes a base and a positioning mechanism disposed on top of the base. The positioning mechanism includes a mounting assembly, two cross-rotatably connected balance bars, four fixed columns, and springs. The mounting assembly includes a fixing plate and a slider. The slider is slidably connected to the base and linked to the ends of the balance bars. During operation, pulling the slider overcomes the spring force, driving the balance bars to open, thereby causing the four fixed columns to move outward synchronously. After releasing, under the action of the springs, the fixed columns automatically retract inward and synchronously clamp the testing mechanism placed on the base. This utility model also includes a fixing mechanism composed of a shaft seat, a limiting rod, and a nut, used for double mechanical locking of the grounding wire connector. Through the linkage positioning mechanism, the problems of cumbersome manual positioning and inaccurate alignment of the testing mechanism are solved.

Description

Technical Field

[0001] This utility model relates to the field of aerospace testing technology, and in particular to a wide-temperature-range pressure resistance testing device for aviation lubricating oil. Background Technology

[0002] As a key material for aero-engines and precision machinery, aviation lubricating oil's insulation withstand voltage performance over a wide temperature range is one of the core indicators for evaluating its quality and safety. When conducting withstand voltage tests, the lubricating oil sample is usually placed in an oil cup of a specific test mechanism with electrodes, and then this test mechanism is placed in the test device for pressure testing.

[0003] During withstand voltage testing, the uniformity and stability of the electric field distribution between electrodes have a decisive impact on the accuracy and repeatability of the test results. Any slight positional shift or tilt will lead to electric field distortion, resulting in erroneous breakdown voltage data. Therefore, accurately and stably placing the test mechanism containing the oil sample in the predetermined position of the test device is a key aspect of ensuring test quality.

[0004] Existing testing devices often use manual alignment or simple clamps to fix the testing mechanism. Manual alignment relies heavily on the operator's experience and care, which is not only inefficient but also makes it difficult to ensure the consistency of the placement position each time, resulting in poor repeatability of test results. Some simple mechanical clamps, such as screw tightening or one-way spring clamping, often cannot provide uniform clamping force, which can easily cause the testing mechanism to become eccentric or tilted during the clamping process, which will also affect the stability of the electric field and reduce the reliability of the test results.

[0005] Therefore, this utility model proposes a wide-temperature-range pressure resistance testing device for aviation lubricating oil to overcome the shortcomings of the prior art. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a wide-temperature-range pressure resistance testing device for aviation lubricating oil, aiming to improve the problem of cumbersome positioning operation of the testing mechanism in some existing wide-temperature-range pressure resistance testing devices for aviation lubricating oil.

[0007] This utility model provides a wide temperature range pressure resistance testing device for aviation lubricating oil, including: a base, and a positioning mechanism disposed on the top of the base. The positioning mechanism includes a mounting assembly, a balance bar, a fixing column, a fixing shaft, and a spring.

[0008] The mounting assembly includes a fixed plate fixedly connected to the bottom of the base and a slider slidably connected to the top of the base. The two balance bars are rotatably connected by the fixed shaft. The fixed posts are fixedly connected to the four corners of the balance bars respectively. The spring is connected between the slider and the fixed plate to provide a restoring force.

[0009] Furthermore, the balance bar and the fixed shaft are rotatably mounted in the groove opened at the top of the base; the bottom of the slider is provided with a strip-shaped hole that passes through its bottom, and the end of the balance bar passes through and slides into the strip-shaped hole. Through this linkage structure, the linear reciprocating motion of the slider can efficiently drive the balance bar to open and close synchronously, thereby driving the fixed column to achieve synchronous opening or closing action.

[0010] Preferably, the bottom of the fixed column is provided with a groove for the balance bar to pass through. The end of the balance bar passes through the bottom of the fixed column and slides along the groove. This structural design can actively compensate for the small geometric position deviations generated by the linkage mechanism during the movement, ensuring that the entire opening and closing process is smooth and without jamming.

[0011] Preferably, the top of the base is provided with an annular or arc-shaped guide groove for guiding the fixed column. The lower end of the fixed column is received in the guide groove and slides along the length of the guide groove. This track-type guidance strictly limits the movement path of the fixed column, thereby effectively avoiding shaking or swaying during the clamping process and significantly improving the accuracy of repeated positioning.

[0012] Preferably, the present invention also includes a testing mechanism, which includes an oil cup for holding lubricating oil and a motor mounted on the oil cup. When the testing mechanism is placed on the base, the motor is evenly clamped from all sides by the four fixing columns, thereby firmly locking the entire testing mechanism in the center position of the device.

[0013] Preferably, it also includes a cover, which is detachably placed on top of the base and completely covers the positioning mechanism and the testing mechanism. This not only prevents contamination from external dust and impurities but also provides a safe isolation for the internal high-voltage components.

[0014] Preferably, it includes a fixing mechanism for dissipating static electricity, the fixing mechanism including a bearing and a fixing block for connecting the bearing to the base, the bearing serving as a grounding terminal to provide a stable base for connecting the grounding line.

[0015] Furthermore, the fixing block is also used to connect an external grounding body, such as an iron block, to form a complete grounding loop from the equipment to the ground, ensuring that the static electricity generated during the test can be safely and effectively discharged, avoiding the interference of static electricity accumulation on the test results or causing safety risks.

[0016] Preferably, the fixing mechanism further includes a grounding wire with a connector and a limiting rod rotatably connected to the bearing about the rotating shaft. After being flipped, the limiting rod can hold and fix the connector that is mated with the bearing, forming the first mechanical and electrical connection, which is convenient and quick to operate.

[0017] Furthermore, the fixing mechanism also includes a nut, which is threaded to the free end of the rotating shaft and is used to tighten after the limiting rod locks the connector. The strong axial tightening force generated by the threaded connection completely locks the limiting rod, the connector, and the shaft seat, forming a second layer of fastening protection, thereby eliminating any chance of accidental loosening and providing the highest level of safety protection for high-voltage testing.

[0018] This utility model has the following beneficial effects: 1. This utility model, by setting a positioning mechanism that links springs, sliders and cross balance bars, realizes automatic centering and quick clamping of the testing mechanism, which solves the problems of cumbersome manual positioning, inaccurate centering and unstable clamping in the prior art, and achieves the technical effects of improving installation efficiency, ensuring repeatability and accuracy of positioning and improving the accuracy of test results.

[0019] 2. This utility model solves the problem that grounding connections may loosen due to vibration or misoperation in the prior art by using a double mechanical locking device consisting of a limit rod and a nut in the fixing mechanism to fasten the grounding wire connector. This achieves the technical effect of ensuring the absolute reliability of the grounding path and greatly improving the safety of equipment and operators.

[0020] 3. This utility model solves the problem of geometric interference or jamming in the linkage mechanism during movement, which leads to unstable movement, by designing a guide groove on the base to guide the sliding of the fixed column, and combining it with the groove opened on the fixed column itself for the balance bar to pass through. This achieves the technical effect of making the entire clamping process smooth and the positioning more accurate and stable. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of a wide-temperature-range pressure resistance testing device for aviation lubricating oil proposed in this utility model; Figure 2 This is a schematic diagram of the structure of the fixing plate of the wide temperature range pressure resistance testing device for aviation lubricating oil proposed in this utility model; Figure 3 for Figure 2Enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0022] Legend: 1. Base; 2. Positioning mechanism; 21. Spring; 22. Mounting assembly; 221. Fixing plate; 222. Slider; 23. Fixing column; 24. Balance bar; 25. Fixing shaft; 3. Lid; 4. Testing mechanism; 41. Oil cup; 42. Electrode; 5. Fixing mechanism; 51. Fixing block; 52. Shaft seat; 53. Rotating shaft; 54. Limiting rod; 55. Nut; 56. Connector; 57. Grounding wire. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example: Reference Figures 1 to 4 This utility model provides a wide-temperature-range pressure resistance testing device for aviation lubricating oil, which aims to solve the problems of cumbersome fixed operation of the test unit, low positioning accuracy, and unstable clamping in the prior art, thus affecting the accuracy of the test results.

[0025] like Figure 1 As shown, it includes a base 1 and a positioning mechanism 2 disposed on the top of the base 1. The base 1 serves as the mounting base for the entire device, providing support and a mounting platform for all other components. The positioning mechanism 2 is used to quickly and automatically clamp and fix the test mechanism 4 placed on the top of the base 1.

[0026] like Figure 2 and Figure 3 As shown, the positioning mechanism 2 includes a mounting assembly 22, two balance bars 24 and four fixed columns 23. The mounting assembly 22 consists of a fixed plate 221 and a slider 222. The bottom of the fixed plate 221 is fixedly connected to the base 1, and the slider 222 is slidably connected to the top of the base 1. A spring 21 is connected between the slider 222 and the fixed plate 221. The spring 21 is used to provide an elastic force for automatic reset after the slider 222 is pulled open by an external force.

[0027] Two balance bars 24 are stacked on top of each other in a cross shape and are rotatably connected together by a fixed shaft 25 to form a scissor linkage structure. The balance bars 24 and the fixed shaft 25 are rotatably installed in the groove opened on the top of the base 1. This design allows the balance bars 24 to stably open and close around the fixed shaft 25.

[0028] The bottom of the slider 222 has a strip-shaped hole that runs through it. One end of the balance bar 24 passes through and slides into this strip-shaped hole. This connection method establishes a linkage mechanism between the slider 222 and the balance bar 24. When the operator slides the slider 222 along the top of the base 1, the linear motion of the slider 222 can be efficiently converted into the opening and closing rotation of the balance bar 24.

[0029] The fixed posts 23 are fixedly connected to the four corners of the two balance bars 24 respectively, and are used to directly contact and clamp the test mechanism 4. When the balance bars 24 open and close, the four fixed posts 23 will open outward or close inward synchronously, thereby releasing or clamping the test mechanism 4. This four-point synchronous clamping method ensures that the test mechanism 4 can be accurately fixed in the center position each time, ensuring the accuracy and repeatability of the test.

[0030] Reference Figure 2 and Figure 4 The bottom of the fixed column 23 is provided with a groove for the balance bar 24 to pass through. The end of the balance bar 24 passes through the bottom of the fixed column 23 and slides along this groove. This structure ensures that when the balance bar 24 is opened and closed, its end can move the fixed column 23 while it can also slide slightly relative to the groove of the fixed column 23, thereby compensating for the geometric position deviation generated during the movement and making the entire linkage process smoother and without jamming.

[0031] The top of the base 1 is also provided with an annular or arc-shaped guide groove for guiding the fixed column 23. The lower end of each fixed column 23 is received in the corresponding guide groove. When the positioning mechanism 2 is working, the lower end of the fixed column 23 will slide along the trajectory set by the guide groove. This groove-guided method strictly limits the movement path of the fixed column 23 and avoids any shaking or swaying during clamping or releasing, thereby greatly improving the accuracy of repeated positioning.

[0032] Through the design of the groove on the fixed column 23 and the guide groove on the base 1, the two work together to ensure that the positioning mechanism 2 not only transmits power smoothly but also moves in a precise trajectory when performing clamping action, thus achieving stable center positioning of the testing mechanism 4.

[0033] like Figure 1As shown, the testing mechanism 4 is detachably placed on top of the base 1 and located between four fixing posts 23. It is fixed by the clamping action of the positioning mechanism 2. The testing mechanism 4 specifically includes an oil cup 41 for holding the aviation lubricating oil to be tested, and an electrode 42 installed on the top of the oil cup 41. When the testing mechanism 4 is placed in place, the four fixing posts 23 clamp the outer shell of the electrode 42 from all sides, thereby firmly locking the entire testing mechanism 4 in the center position of the base 1. It also includes a cover 3.

[0034] like Figure 1 As shown, the cover 3 is detachably covered on the top of the base 1, which can completely cover the positioning mechanism 2 and the placed testing mechanism 4, thereby preventing contamination from external dust and impurities and ensuring the safety of operators. It is also equipped with a structurally reliable fixing mechanism 5.

[0035] like Figure 1 As shown, the fixing mechanism 5 includes a bearing 52 and a fixing block 51. The fixing block 51 fixes the bearing 52 to the base 1. The bearing 52 serves as a grounding terminal, providing a stable base point for the connection of the grounding wire 57. The fixing block 51 is also used to connect an external grounding body, such as an iron block. This design allows current to be conducted from the bearing 52 through the fixing block 51 to the ground, achieving effective and safe grounding. The fixing mechanism 5 also includes a grounding wire 57, the end of which is provided with a connector 56, such as... Figure 1 As shown, the connector 56 is used to mate with the bearing seat 52. This device includes a limiting rod 54 that is rotatably connected to the bearing seat 52 about the rotating shaft 53. After the connector 56 is mated with the bearing seat 52, the limiting rod 54 can be flipped over. The lever action of the limiting rod 54 is used to firmly hold the connector 56 on the bearing seat 52, establishing a preliminary electrical and mechanical connection. The fixing mechanism 5 also includes a nut 55.

[0036] like Figure 1 As shown, nut 55 is threaded to the free end of rotating shaft 53. After the limit rod 54 locks the connector 56, tightening nut 55 will apply a tightening force to the limit rod 54 and the shaft seat 52, thereby completely locking the entire connection structure and eliminating any chance of loosening, providing the highest level of safety for high-voltage testing.

[0037] The implementation principle of this application embodiment is as follows: During the test, lubricating oil is processed and placed inside the oil cup 41, and then the electrode 42 is installed. The test mechanism 4 is placed on the top of the base 1, and the slider 222 is pushed outward to overcome the elastic force of the spring 21. In the installation assembly, the slider 222 slides on the top of the base 1, the bottom of the fixing plate 221 fixes the base 1, and the middle of the slider 222 and the fixing plate 221 is connected by the spring 21. The bottom of the slider 222 has a strip-shaped hole that passes through the bottom. The two balance rods 24 are stacked vertically and cross each other. The fixing shaft 25 passes through them to facilitate rotation. The balance rods 24 and the fixing shaft 25 are fixed in the groove opened on the top of the base 1. The fixing column 23 is fixed at the four opposite corners of the two balance rods 24 respectively. The electrode 42 slides through the groove of the fixing column 23 from the bottom. The positioning mechanism 2 limits and fixes the electrode 42 to ensure the accuracy of the test. After installation, the cover 3 is put on. Before testing, connect the grounding wire 57 to the iron block, connect the connector 56 to the shaft seat 52, and then rotate the limiting rod 54 around the rotating shaft 53 to flip it, so that the connector 56 is stuck on the shaft seat 52. Then rotate the nut 55 to tighten the limiting rod 54 and the shaft seat 52. In the fixing mechanism 5, the shaft seat 52 is connected to the iron block and the base 1 through the fixing block 51 to conduct away static electricity.

Claims

1. An aviation lubricating oil wide temperature range pressure resistance testing device, comprising a base (1), characterized in that, Includes a positioning mechanism (2) disposed on the top of the base (1); The positioning mechanism (2) is used to clamp and fix the test mechanism (4) placed on the top of the base (1); The positioning mechanism (2) includes an installation assembly (22), two balance bars (24) that are rotatably connected by a fixed shaft (25), and fixed posts (23) that are fixedly connected to the four corners of the balance bars (24). The mounting assembly (22) includes a fixing plate (221) fixedly connected to the bottom of the base (1) and a slider (222) slidably connected to the top of the base (1). A spring (21) for providing a restoring force is connected between the slider (222) and the fixing plate (221). The balance bar (24) and the fixing shaft (25) are rotatably mounted in a groove opened on the top of the base (1). A strip-shaped hole is opened at the bottom of the slider (222). The end of the balance bar (24) passes through and slides into the strip-shaped hole so as to drive the balance bar (24) to open and close when the slider (222) slides, thereby driving the fixing column (23) to open or close synchronously.

2. The wide temperature range pressure resistance testing device for aviation lubricating oil according to claim 1, characterized in that, The bottom of the fixed column (23) is provided with a groove for the balance bar (24) to pass through, and the end of the balance bar (24) passes through the bottom of the fixed column (23) and slides along the groove.

3. The wide-temperature-range pressure resistance testing device for aviation lubricating oil according to claim 1, characterized in that, The testing mechanism (4) includes an oil cup (41) for holding lubricating oil and an electrode (42) mounted on the oil cup (41). When the test mechanism (4) is placed on the base (1), the electrode (42) is held by four fixed posts (23).

4. The wide-temperature-range pressure resistance testing device for aviation lubricating oil according to claim 3, characterized in that, Including the lid (3); The cover (3) is detachably placed on top of the base (1) and encloses the positioning mechanism (2) and the testing mechanism (4) therein.

5. The wide-temperature-range pressure resistance testing device for aviation lubricating oil according to claim 1, characterized in that, Includes a fixing mechanism (5) for discharging static electricity; The fixing mechanism (5) includes a bearing (52) and a fixing block (51) for connecting the bearing (52) and the base (1).

6. The wide-temperature-range pressure resistance testing device for aviation lubricating oil according to claim 5, characterized in that, The fixing block (51) is also used to connect an external grounding body, such as an iron block, to form a complete grounding circuit.

7. The wide-temperature-range pressure resistance testing device for aviation lubricating oil according to claim 5, characterized in that, The fixing mechanism (5) includes a grounding wire (57), and the end of the grounding wire (57) is provided with a connector (56), which is connected to the bearing (52).

8. The wide-temperature-range pressure resistance testing device for aviation lubricating oil according to claim 7, characterized in that, The fixing mechanism (5) includes a limiting rod (54) that is rotatably connected to the bearing (52) about the rotating shaft (53). After the limiting rod (54) is flipped over, the connector (56) can be held on the bearing seat (52).

9. The wide-temperature-range pressure resistance testing device for aviation lubricating oil according to claim 8, characterized in that, The fixing mechanism (5) includes a nut (55); The nut (55) is threaded to the free end of the rotating shaft (53) and is used to tighten the limiting rod (54) and the shaft seat (52) to ensure the reliability of the connection of the joint (56).

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