High-temperature oil pressure testing machine

Abstract

The utility model belongs to the field of testing machines, and particularly relates to a high-temperature oil pressure testing machine which comprises a sealing clamp, a buffering oil cylinder, a high-pressure gear pump and an oil conveying pipeline, the high-pressure gear pump is connected with the buffering oil cylinder through the oil conveying pipeline, a heater is installed in the buffering oil cylinder, and the top of the buffering oil cylinder is connected with an oil hydraulic system. The buffering oil cylinder is connected with the sealing clamp through the oil conveying pipeline, a tested piece is arranged in the sealing clamp, and temperature sensors and pressure sensors are installed in the sealing clamp and the buffering oil cylinder. The device can be used for testing the performance of a sealing element which needs to work in a high-temperature and high-pressure oil environment, oil is heated from the outside and then injected into a sealing clamp through a hydraulic system for testing, the phenomenon that the oil pressure rise is not controlled due to the fact that the oil is heated in the sealing clamp is avoided, and the testing accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the field of testing machines, and particularly to a high-temperature oil pressure testing machine. Background Art

[0002] When testing the performance of gaskets on aircraft engines, it is necessary to simulate the environment in which the gaskets work, which is in high-temperature and high-pressure oil. The existing simulation method is to heat the oil through a heat pump. This method can only heat the oil to 120 degrees Celsius. However, this kind of gasket requires an environment of 320 degrees Celsius. There is also a method of heating the oil to a specified temperature in a testing machine. However, heating the oil in the space of the testing machine will cause the expansion of the oil, which will affect the pressure.

[0003] Therefore, aiming at the above existing problems, a high-temperature oil pressure testing machine is specifically proposed. Summary of the Utility Model

[0004] The utility model aims at the problems existing above, and specifically designs a high-temperature oil pressure testing machine. This device can conduct performance tests on seals that need to work in an environment of high-temperature and high-pressure oil. By heating the oil externally and then injecting it into the sealing fixture through a hydraulic system for testing, it avoids the phenomenon that the oil pressure rises uncontrollably caused by heating the oil in the sealing fixture, and improves the accuracy of the test.

[0005] To achieve the above object, the utility model provides a high-temperature oil pressure testing machine, including: a sealing fixture, a buffer oil cylinder, a high-pressure gear pump, and an oil pipeline. The high-pressure gear pump is connected to the buffer oil cylinder through the oil pipeline. A heater is installed in the buffer oil cylinder. The buffer oil cylinder is connected to the sealing fixture through the oil pipeline. The test piece is placed in the sealing fixture. Temperature sensors and pressure sensors are installed in both the sealing fixture and the buffer oil cylinder.

[0006] In the above way, the test piece is clamped in the sealing fixture to provide a sealed environment for one end of the test piece. The buffer oil cylinder heats the oil therein, and then injects the internal oil into the sealing fixture through a hydraulic system. By observing whether oil leaks from the upper part of the test piece, the performance of the test piece can be judged.

[0007] Further, the sealing fixture includes a base, a middle cylinder, a top cover, and a support column. The support column is fixedly connected to the upper part of the base. The test piece is sleeved outside the support column. The middle cylinder is sleeved outside the test piece and fixedly connected to the base. The top cover is sleeved outside the test piece and fixedly connected to the middle cylinder.

[0008] In the above way, the support column provides a support point for the test piece. The middle cylinder and the top cover are both sleeved outside the test piece, achieving the effect of convenient installation.

[0009] Further, the sealing fixture further includes an oil injection cavity, which is located between the base and the middle cylinder, and the oil delivery pipeline communicates with the oil injection cavity.

[0010] Further, the base further includes a bearing platform, which is integrally formed with the base and located in the middle of the base. The workpiece to be measured is located on the bearing platform, and the oil injection cavity is located between the side wall of the bearing platform and the inner wall of the middle cylinder.

[0011] By the above method, the oil injection cavity is located below the workpiece to be measured. High-temperature and high-pressure oil enters the oil injection cavity and impacts the workpiece to be measured upward under the action of pressure, achieving the effect of measuring the performance of the workpiece to be measured.

[0012] Further, it further includes a retaining ring, which is detachably connected to the top of the support column, and the workpiece to be measured is located below the retaining ring.

[0013] Further, it further includes a detection cavity. An oil outlet hole is provided on the top cover, and the detection cavity is located between the workpiece to be measured and the top cover.

[0014] Further, the buffer oil cylinder further includes a hydraulic push rod, which is slidably connected to the inner wall of the buffer oil cylinder up and down. The top of the hydraulic push rod passes through the top of the buffer oil cylinder and is connected to the hydraulic system.

[0015] Further, a servo valve is also connected to the oil delivery pipeline, and the servo valve is located between the high-pressure gear pump and the buffer oil cylinder.

[0016] Further, it further includes an oil return pipeline. One end of the oil return pipeline is connected to the servo valve, and the other end is connected to the buffer oil cylinder. An oil return valve is connected to the oil return pipeline, and the oil return valve is connected to an external oil storage carrier through a pipeline.

[0017] Further, an oil overflow valve is also connected to the oil return pipeline.

[0018] In summary, the present utility model has the following advantages and beneficial technical effects:

[0019] 1. The high-temperature oil pressure testing machine of the present utility model can provide high-temperature oil meeting the test standards for the workpiece to be measured without causing high-temperature expansion of the oil.

[0020] 2. The sealing fixture of the high-temperature oil pressure testing machine of the present utility model adopts a three-section structure design, which facilitates the installation of the workpiece to be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present utility model will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1 is a schematic structural view of a high-temperature oil pressure testing machine of the present utility model;

[0023] Figure 2 is a schematic structural view inside the sealing assembly of a high-temperature oil pressure testing machine of the present utility model;

[0024] Figure 3 is a schematic structural view of a buffer oil cylinder of a high-temperature oil pressure testing machine of the present utility model

[0025] Figure 4 is a schematic overall structural view of a sealing assembly of a high-temperature oil pressure testing machine of the present utility model;

[0026] Figure 5 is a schematic structural view of the top cover of a high-temperature oil pressure testing machine of the present utility model.

[0027] The reference numerals in the drawings are:

[0028] 1 - sealing fixture; 11 - base; 111 - bearing platform; 12 - middle cylinder; 13 - top cover; 131 - oil outlet hole; 14 - oil injection cavity; 15 - support pillar; 16 - retaining ring; 17 - detection cavity;

[0029] 2 - buffer oil cylinder; 21 - heater; 22 - hydraulic push rod;

[0030] 3 - high-pressure gear pump; 4 - test piece; 5 - oil pipeline; 51 - servo valve;

[0031] 6 - oil return pipeline; 61 - oil return valve; 62 - oil spill valve; 7 - temperature sensor; 8 - pressure sensor. Detailed implementation manners

[0032] The following further elaborates on the present utility model in conjunction with the attached Figures 1-5 drawings. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar components or components with the same or similar functions throughout. The embodiments described by referring to the drawings are exemplary and are intended to explain the present utility model, rather than being construed as a limitation to the present utility model.

[0033] In the description of the present utility model, unless otherwise clearly specified and defined, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning. The parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those of ordinary skill in the art.

[0035] As Figure 1 , Figure 2 and Figure 3 shown, it includes: a sealing fixture 1, a buffer oil cylinder 2, a high-pressure gear pump 3, and an oil pipeline 5. The high-pressure gear pump 3 is connected to the buffer oil cylinder 2 through the oil pipeline 5. A heater 21 is installed inside the buffer oil cylinder 2, and the heater 21 is located on the inner wall at the bottom of the buffer oil cylinder 2. The top of the buffer oil cylinder 2 is connected to an oil hydraulic system. The buffer oil cylinder 2 further includes a hydraulic push rod 22, and the hydraulic push rod 22 is slidably connected to the inner wall of the buffer oil cylinder 2 up and down. The top of the hydraulic push rod 22 passes through the top of the buffer oil cylinder 2 and is connected to the hydraulic system. The buffer oil cylinder 2 is connected to the sealing fixture 1 through the oil pipeline 5. The measured part 4 is placed in the sealing fixture 1, and temperature sensors 7 and pressure sensors 8 are installed in both the sealing fixture 1 and the buffer oil cylinder 2.

[0036] As Figure 2 , Figure 4 and Figure 5 shown, the sealing fixture 1 includes a base 11, a middle cylinder 12, a top cover 13, and a support column 15. The support column 15 is fixedly connected to the upper part of the base 11 by welding. The measured part 4 is sleeved outside the support column 15. The middle cylinder 12 is sleeved outside the measured part 4 and is fixedly connected to the base 11 by bolts. The top cover 13 is sleeved outside the measured part 4 and is fixedly connected to the middle cylinder 12 by bolts.

[0037] The base 11 further includes a bearing platform 111. The bearing platform 111 is integrally formed with the base 11 and is located in the middle of the base 11. The bearing platform 111 is a convex columnar structure. The test piece 4 is located on the bearing platform 111. The oil injection cavity 14 is located between the side wall of the bearing platform 111 and the inner wall of the middle cylinder 12.

[0038] As Figure 2 shown, the sealing fixture 1 further includes an oil injection cavity 14. The oil injection cavity 14 is located between the base 11 and the middle cylinder 12. The oil injection cavity 14 is an annular region. The oil delivery pipeline 5 passes through the middle cylinder 12 and communicates with the oil injection cavity 14. It further includes a retaining ring 16. The bottom of the retaining ring 16 is detachably connected to the top of the support column 15 in a threaded manner. The test piece 4 is located below the retaining ring 16. The retaining ring 16 clamps the test piece 4 on the bearing platform 111.

[0039] It further includes a detection cavity 17. An oil outlet hole 131 is opened on the top cover 13. The detection cavity 17 is located between the test piece 4 and the top cover 13. If the sealing performance of the test piece 4 is not good, the oil will leak through the test piece into the detection cavity 17 and flow out through the oil outlet hole 131.

[0040] A servo valve 51 is further connected to the oil delivery pipeline 5. The servo valve 51 is located between the high-pressure gear pump 3 and the buffer oil cylinder 2. It further includes an oil return pipeline 6. One end of the oil return pipeline 6 is connected to the servo valve 51, and the other end is connected to the buffer oil cylinder 2. An oil return valve 61 is connected to the oil return pipeline 6. The oil return valve 61 is connected to an external oil storage carrier through a pipeline. An oil spill valve 62 is also connected to the oil return pipeline 6.

[0041] The working principle of a high-temperature oil pressure testing machine of the present utility model is as follows:

[0042] The oil is pumped into the buffer oil cylinder 2 by the high-pressure gear pump 3, and the oil is heated by the heater 21; at this time, the test piece 4 is sleeved on the support column 15, then the middle cylinder 12 and the base 11 are installed, then the retaining ring 16 is installed on the top of the support column 15, and then the top cover 13 is installed on the top of the middle cylinder 12. The oil heated to the specified temperature is pressurized through the hydraulic system. After being pressurized to the specified value, the oil delivery pipeline 5 is opened, and the oil is transported to the oil injection cavity 14, and then it is observed whether oil leaks from the oil outlet hole 131.

[0043] The above are all the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A high temperature oil pressure testing machine, characterized in that: include: A sealing fixture (1), a buffer oil cylinder (2), a high-pressure gear pump (3) and an oil pipeline (5), wherein the high-pressure gear pump (3) is connected to the buffer oil cylinder (2) via the oil pipeline (5), a heater (21) is installed in the buffer oil cylinder (2), the top of the buffer oil cylinder (2) is connected to an oil hydraulic system, the buffer oil cylinder (2) is connected to the sealing fixture (1) via the oil pipeline (5), a test piece (4) is placed in the sealing fixture (1), and a temperature sensor (7) and a pressure sensor (8) are installed in both the sealing fixture (1) and the buffer oil cylinder (2).

2. A high temperature oil pressure testing machine according to claim 1, characterized in that: The sealing fixture (1) comprises a base (11), a middle cylinder (12), a top cover (13) and a support (15); the support (15) is fixedly connected to the upper part of the base (11); the tested object (4) is sleeved on the outside of the support (15); the middle cylinder (12) is sleeved on the outside of the tested object (4) and fixedly connected to the base (11); and the top cover (13) is sleeved on the outside of the tested object (4) and fixedly connected to the middle cylinder (12).

3. A high temperature oil pressure testing machine according to claim 2, characterized in that: The sealing fixture (1) further comprises an oil injection chamber (14), wherein the oil injection chamber (14) is located between the base (11) and the middle cylinder (12), and the oil delivery pipeline (5) is in communication with the oil injection chamber (14).

4. A high temperature oil pressure testing machine according to claim 3, characterized in that: The base (11) further comprises a bearing platform (111), the bearing platform (111) being integrally formed with the base (11) and being located in the middle of the base (11), the tested component (4) being located on the bearing platform (111), and the oil injection cavity (14) being located between a side wall of the bearing platform (111) and an inner wall of the middle cylinder (12).

5. A high temperature oil pressure testing machine according to claim 2, characterized in that: It also comprises a retaining ring (16), wherein the retaining ring (16) is detachably connected to the top of the support (15), and the tested object (4) is located below the retaining ring (16).

6. A high temperature oil pressure testing machine according to claim 2, characterized in that: It also comprises a detection cavity (17), the top cover (13) is provided with an oil outlet hole (131), and the detection cavity (17) is located between the tested object (4) and the top cover (13).

7. A high temperature oil pressure testing machine according to claim 1, characterized in that: The buffer oil cylinder (2) further comprises a hydraulic push rod (22), the hydraulic push rod (22) being slidably connected to the inner wall of the buffer oil cylinder (2) in an up-and-down manner, and the top of the hydraulic push rod (22) passing through the top of the buffer oil cylinder (2) to be connected to the hydraulic system.

8. A high temperature oil pressure testing machine according to claim 1, characterized in that: The oil delivery pipeline (5) is also connected to a servo valve (51), and the servo valve (51) is located between the high-pressure gear pump (3) and the buffer oil cylinder (2).

9. A high temperature oil pressure testing machine according to claim 8, characterized in that: It also comprises an oil return pipeline (6), one end of the oil return pipeline (6) being connected to the servo valve (51), and the other end being connected to the buffer oil cylinder (2), the oil return pipeline (6) being connected to an oil return valve (61), and the oil return valve (61) being connected to an external oil storage carrier via a pipeline.

10. A high temperature oil pressure testing machine according to claim 9, characterized in that: The oil return pipeline (6) is also connected to an oil overflow valve (62).

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