A sealed dynamic performance experiment test platform

Abstract

The application discloses a kind of sealed dynamic performance experimental test platform, including environmental box, experimental sleeve, hydraulic oil pump, high-speed reciprocating device and leakage detection device, temperature control device I is equipped in environmental box and is equipped with base, temperature sensor probe is equipped in base, experimental sleeve includes left guide sleeve, shaft cylinder and right guide sleeve, between which are equipped with sealing, and coaxial through hole is opened in axial, aperture is slightly larger than experimental shaft, shaft cylinder and left guide sleeve, right guide sleeve are equipped with the sealing piece to be measured between, shaft cylinder is equipped with oil supply pipeline and oil return pipeline with base and is equipped with sealing, oil supply pipeline and oil return pipeline are all connected with the hydraulic oil pump of containing temperature control device II and communicate, left and right guide sleeve lower part are all with inverted funnel structure and middle part inclined notch.Real-time measurement leakage rate, realize the data measurement and performance evaluation of hydraulic reciprocating dynamic sealing.

Description

Technical Field

[0001] This invention relates to the field of sealing technology, and in particular to a dynamic performance testing platform for sealing. Background Technology

[0002] Hydraulic transmission is a transmission method that uses liquid as the working medium for energy transfer and control. The prerequisite for hydraulic transmission is that the liquid needs to be confined within a limited and controllable space. However, joints and transition points are key areas for liquid leakage and pressure drop. Therefore, selecting and designing suitable seals for joints and transition points is an important area of ​​continuous focus and research in the field of hydraulic transmission.

[0003] There are many methods for evaluating and testing the effectiveness of hydraulic seals, including appearance, dimensions, force, and pressure, but ultimately they are all directly or indirectly reflected in the amount and rate of fluid leakage. Factors affecting leakage include materials, structure, high and low temperature environments, oil pressure, whether pulsation occurs, and reciprocating speed. The degree of influence of each of these factors individually, the weight of each factor after combination, and the coupling results under complex conditions of multiple factors are all factors that a hydraulic reciprocating seal experimental testing platform needs to consider.

[0004] Existing sealing performance testing platforms either fail to fully cover leakage factors or exhibit excessive correlation among multiple factors, making decoupling analysis impossible. Summary of the Invention

[0005] To address the technical problems existing in the background art, this invention proposes a sealing dynamic performance experimental testing platform.

[0006] The present invention proposes a sealing dynamic performance test platform, comprising an environmental chamber 1 with an internal temperature control device I, a base 22 fixed to the bottom wall of the environmental chamber 1, and a temperature sensor probe 23 disposed within the base 22. The environmental chamber 1 includes:

[0007] The experimental sleeve includes a shaft sleeve 12 fixed to the upper end of the base 22. The two ends of the shaft sleeve 12 are respectively connected to a left guide sleeve 14 and a right guide sleeve 8. An experimental shaft 4 is inserted through the axial through hole of the shaft sleeve 12. A test seal 10 is installed between the shaft sleeve 12 and the left guide sleeve 14, and between the shaft sleeve and the right guide sleeve 8. The middle interior of the shaft sleeve is connected to a hydraulic oil pump 18 located outside the environmental chamber 1 through a pipeline. The hydraulic oil pump 18 is equipped with a temperature control device II. The lower part of the left guide sleeve 14 and the right guide sleeve 8 are provided with an anti-funnel structure and a central inclined groove 21 that are connected to the outside of the environmental chamber 1 to guide the flow of leaked oil.

[0008] A high-speed reciprocating drive device is connected to the right end of the experimental shaft 4 and drives the experimental shaft 4 to perform high-speed reciprocating motion along its axial direction;

[0009] The leakage detection device is located directly below the inverted funnel structure. It is used to collect leaked oil droplets and to collect data on the amount and speed of oil droplet leakage. In various environmental condition tests, if the seal 10 under test does not seal well, the leaked oil droplets will flow into the leakage detection device through the inverted funnel structure and the inclined groove 21 in the middle.

[0010] Preferably, the experimental sleeve further includes a left oil-free bushing 16 and a right oil-free bushing 5. The left end of the left guide sleeve 14 is also connected to the left oil-free bushing 16, and the right end of the right guide sleeve 8 is also connected to the right oil-free bushing 5. The shaft sleeve 12 has an oil inlet 24 and an oil outlet 25 in the middle. The oil inlet 24 is connected to the oil supply line of the base 22 and is equipped with a first seal 26. The oil outlet 25 is connected to the oil return line of the base 22 and is equipped with a second seal 27. Both the oil supply line and the oil return line are connected to the hydraulic oil pump 18.

[0011] Preferably, a third seal 6 is installed on the right guide sleeve 8, and a fourth seal 9 is installed between the right guide sleeve 8 and the shaft cylinder 12; the cooperation between the left guide sleeve 14 and the shaft cylinder 12 is mirror symmetrical with that of the right guide sleeve 8.

[0012] Preferably, the high-speed reciprocating drive device includes a servo motor 2 and a transmission shaft 3. The transmission shaft 3 is hinged to the experimental shaft 4. When the servo motor 2 is started, the experimental shaft 4 is driven to reciprocate linearly through the transmission shaft 3.

[0013] Preferably, the temperature control device I can control the air temperature inside the environmental chamber 1 between -70℃ and 200℃.

[0014] Preferably, the temperature control device II is used to control the oil temperature between -70℃ and 200℃, and is connected to the experimental shaft 4 through the base 22 and the shaft cylinder 12 to provide oil pressure.

[0015] Preferably, the leakage detection device includes a measuring cylinder 19 and an infrared sensor counter 20. The measuring cylinder 19 is located directly below the inverted funnel structure and is used to collect leaked oil droplets. The infrared sensor counter 20 can collect data on the amount and speed of oil droplet leakage and evaluate the dynamic sealing performance of the seal 10 under test based on the amount and speed of oil droplet leakage.

[0016] Preferably, the shaft cylinder 12 is connected to the base 22 through a lower opening and positioned by a positioning pin 11, and fixed by a first connection 13; the positioning pin 11 is fixed on the base 22.

[0017] Preferably, the upper part of the right guide sleeve 8 has an air vent 7, which is connected to the atmosphere outside the environmental chamber 1 by a pipe.

[0018] In summary, the present invention has the following beneficial effects: by controlling the air temperature in the environmental chamber through temperature control device I and the hydraulic oil temperature through temperature control device II, and in conjunction with the high-speed reciprocating drive device, it can simulate various different types of environmental working conditions, such as high temperature, high pressure, high speed, pulse, low temperature, and reciprocating, to test the sealing performance of the seal under test, and detect the oil leakage amount and leakage rate in real time, providing data support for the measurement and evaluation of sealing effect, and realizing the data measurement and performance evaluation of hydraulic reciprocating dynamic seal.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the sealing dynamic performance test platform according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the connection between the shaft and the base in an embodiment of the present invention.

[0022] In the picture:

[0023] 1. Environmental chamber; 2. Servo motor; 3. Drive shaft; 4. Experimental shaft; 5. Right oil-free bushing; 6. Third seal; 7. Vent; 8. Right guide sleeve; 9. Fourth seal; 10. Seal to be tested; 11. Positioning pin; 12. Shaft cylinder; 13. First connection; 14. Left guide sleeve; 15. Second connection; 16. Left oil-free bushing; 17. Third connection; 18. Hydraulic oil pump; 19. Measuring cylinder; 20. Infrared sensor counter; 21. Central inclined slot; 22. Base; 23. Temperature sensor probe; 24. Oil inlet; 25. Oil outlet; 26. First seal; 27. Second seal. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] like Figure 1-2 As shown, the sealing dynamic performance test platform proposed in this embodiment includes an environmental chamber 1 with an internal temperature control device I, a base 22 fixed to the bottom wall of the environmental chamber 1, a temperature sensor probe 23 installed inside the base 22, and the environmental chamber 1 includes:

[0026] The experimental sleeve includes a shaft sleeve 12 fixed to the upper end of the base 22. A left guide sleeve 14 and a right guide sleeve 8 are connected to the two ends of the shaft sleeve 12, respectively. An experimental shaft 4 passes through the axial through hole of the shaft sleeve 12 (the diameter of the axial through hole of the shaft sleeve 12 is slightly larger than the diameter of the experimental shaft 4). A seal 10 to be tested is installed between the shaft sleeve 12 and the left guide sleeve 14, and between the shaft sleeve and the right guide sleeve 8. Specifically, the lower part of the left guide sleeve 14 has a right boss extending to the right, which is coaxially fitted with the axial through hole of the shaft sleeve 12. The seal 10 to be tested is installed between the right boss and the axial through hole of the shaft sleeve 12. Part 10, the lower part of the right guide sleeve 8 is provided with a boss extending to the left. The boss is coaxially engaged with the axial through hole of the shaft cylinder 12. The seal 10 to be tested is installed between the boss and the axial through hole of the shaft cylinder 12. The middle interior of the shaft cylinder is connected to the hydraulic oil pump 18 located outside the environmental box 1 through a pipeline. The hydraulic oil pump 18 is equipped with a temperature control device II. The lower parts of the left guide sleeve 14 and the right guide sleeve 8 are provided with an anti-funnel structure and a central inclined groove 21 that are connected to the outside of the environmental box 1 to guide the flow of leaking oil. The anti-funnel structure and the central inclined groove 21 guide the flow of leaking oil and prevent oil backflow.

[0027] Among them, the temperature sensor probe 23 is used to measure the temperature of the experimental sleeve.

[0028] Specifically, the shaft cylinder 12 is connected to the base 22 through the lower opening and positioned by the positioning pin 11, and fixed by the first connection 13; the positioning pin 11 is fixed on the base 22 to ensure installation accuracy.

[0029] It should be noted that the hydraulic oil pump 18 is connected to the experimental shaft 4 through the base 22 and the shaft cylinder 12 to provide experimental oil pressure; the hydraulic oil pump 18 is equipped with a switching valve to provide constant oil pressure or pulse oil pressure; the hydraulic oil pump 18 is equipped with a temperature control device II to provide an internal temperature environment for the experimental sleeve.

[0030] A high-speed reciprocating drive device is connected to the right end of the experimental shaft 4 and drives the experimental shaft 4 to perform high-speed reciprocating motion along its axial direction.

[0031] Specifically, the high-speed reciprocating drive device includes a servo motor 2 and a transmission shaft 3. One end of the experimental shaft 4 is horizontally inserted into the experimental sleeve, and the other end is hinged to the transmission shaft 3. When the servo motor 2 is started, it drives the experimental shaft 4 to reciprocate linearly through the transmission shaft 3. The specific transmission structure and transmission method can refer to existing structures, and will not be repeated in this article.

[0032] The leak detection device is located directly below the inverted funnel structure. It is used to collect leaking oil droplets and to collect data on the amount and speed of oil droplet leakage. In various environmental condition tests, if the seal 10 under test does not seal well, the leaking oil droplets will flow into the leak detection device through the inverted funnel structure and the inclined groove 21 in the middle.

[0033] Specifically, temperature control device I is used to provide an external temperature environment for the experimental sleeve, and temperature control device I can control the air temperature inside the environmental chamber 1 between -70℃ and 200℃;

[0034] Temperature control device II is used to control the oil temperature between -70℃ and 200℃, and is connected to the experimental shaft 4 through base 22 and shaft cylinder 12 to provide oil pressure.

[0035] In this way, by controlling the air temperature in the environmental chamber through temperature control device I and the hydraulic oil temperature through temperature control device II, and in conjunction with the high-speed reciprocating drive device, various different types of environmental conditions (high temperature, high pressure, high speed, pulse, low temperature, reciprocating and other single or combined simulated operating conditions) can be simulated to test the sealing performance of the seal under test, and the oil leakage amount and leakage rate can be detected in real time, providing data support for the measurement and evaluation of sealing effect, and realizing the data measurement and performance evaluation of hydraulic reciprocating dynamic seal.

[0036] Furthermore, the experimental sleeve also includes a left oil-free bushing 16 and a right oil-free bushing 5. The left end of the left guide sleeve 14 is also connected to the left oil-free bushing 16, and the right end of the right guide sleeve 8 is also connected to the right oil-free bushing 5. The shaft sleeve 12 has an oil inlet 24 and an oil outlet 25 in the middle. The oil inlet 24 is connected to the oil supply line of the base 22 and is equipped with a first seal 26. The oil outlet 25 is connected to the oil return line of the base 22 and is equipped with a second seal 27. Both the oil supply line and the oil return line are connected to the hydraulic oil pump 18.

[0037] Furthermore, the upper part of the right guide sleeve 8 has an air vent 7, which is connected to the atmosphere outside the environmental chamber 1 via a pipe. Similarly, the upper part of the left guide sleeve 14 also has an air vent, which is connected to the atmosphere outside the environmental chamber 1 via a pipe. A third seal 6 is installed on the right guide sleeve 8, and a fourth seal 9 is installed between the right guide sleeve 8 and the shaft cylinder 12. The fit between the left guide sleeve 14 and the shaft cylinder 12 is mirror-symmetrical to that of the right guide sleeve 8.

[0038] In this embodiment, the leakage detection device includes a measuring cylinder 19 and an infrared sensor counter 20. The measuring cylinder 19 is located directly below the inverted funnel structure and is used to collect leaked oil droplets. The infrared sensor counter 20 can complete the data acquisition of oil droplet leakage amount and oil droplet leakage speed, and evaluate the dynamic sealing performance of the seal 10 under test based on the oil droplet leakage amount and oil droplet leakage speed.

[0039] The working principle is as follows: During the experiment, the temperature control device I controls the air temperature inside the environmental chamber 1 to provide an external temperature environment for the experimental shaft and the seal under test. The temperature control device II of the hydraulic oil pump 18 controls the temperature of the pumped hydraulic oil to provide an internal temperature environment for the experimental shaft and the seal under test. The two temperature environments can be provided individually or in combination. The hydraulic oil pump 18 provides a stable oil pressure field through the oil supply line, base 22, and oil inlet 24, or provides a pulsed oil pressure field through the oil supply line, base 22, oil inlet 24, shaft cylinder 12, oil outlet 25, and return line. The servo motor 2 provides a high-speed, reciprocating, and precise motion field through the transmission shaft 3 and experimental shaft 4. At this time, the infrared sensor counter measures the leakage rate in real time. In summary, through the above combination, it is possible to simulate a single or multiple combined operating environment such as high temperature, high pressure, high speed, pulse, low temperature, and reciprocating. The sealing effect of the seal under test 10 is characterized by the measured leakage rate. If there is no leakage in the measuring cylinder, it indicates that the sealing performance of the seal 10 under test is good and meets the requirements; if there is leakage in the measuring cylinder, the sealing performance of the seal 10 under test is evaluated based on the amount and rate of oil leakage.

[0040] It should be noted that the specific structures of temperature control device I and temperature control device II in this embodiment can refer to existing structures, and will not be repeated in this article.

[0041] Preferably, for ease of control, this embodiment may also include a control device, which can be communicatively connected to the temperature sensor probe 23, the hydraulic oil pump 18, the high-speed reciprocating drive device, and the leakage detection device.

[0042] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A sealed dynamic performance experiment test platform, characterized in that, It includes the environmental box (1) that is equipped with temperature control device I in the inside, the bottom wall is fixed with base (22) in the environmental box (1), temperature sensor probe (23) is equipped with in the base (22), the environmental box (1) includes: The experimental sleeve includes the shaft cylinder (12) fixed on the upper end of the base (22), the left guide sleeve (14) and the right guide sleeve (8) are connected on both ends of the shaft cylinder (12) respectively, the experimental shaft (4) is arranged in the axial through hole of the shaft cylinder (12), the shaft cylinder (12) and the left guide sleeve (14) and the right guide sleeve (8) are all equipped with the sealing element (10) to be measured, the middle part of the shaft cylinder is communicated with the hydraulic oil pump (18) outside the environmental box (1) through the pipeline, the hydraulic oil pump (18) is equipped with temperature control device II, the lower part of the left guide sleeve (14) and the right guide sleeve (8) is equipped with the reverse funnel structure and the middle part inclined notch (21) for guiding the flow direction of the leaked oil liquid and communicated with the environmental box (1) outside; The high-speed reciprocating driving device is connected with the right end of the experimental shaft (4) and drives the experimental shaft (4) to make high-speed reciprocating motion along the axial direction. The leakage detection device is located directly below the reverse funnel structure, is used for receiving the leaked oil droplets, and completes the data acquisition of the oil droplet leakage amount and the oil droplet leakage speed, if the sealing of the sealing element (10) to be measured is not good in various environmental condition tests, the leaked oil droplets will flow into the leakage detection device through the reverse funnel structure and the middle part inclined notch (21).

2. The sealed dynamic performance test platform of claim 1, wherein, The experimental sleeve further includes the left oil-free bushing (16) and the right oil-free bushing (5), the left end of the left guide sleeve (14) is further connected with the left oil-free bushing (16), the right end of the right guide sleeve (8) is further connected with the right oil-free bushing (5), the middle part of the shaft cylinder (12) is provided with the oil inlet (24) and the oil outlet (25), the oil inlet (24) is connected with the oil supply pipeline of the base (22) and is provided with the first seal (26), the oil outlet (25) is connected with the oil return pipeline of the base (22) and is provided with the second seal (27), and the oil supply pipeline and the oil return pipeline are connected with the hydraulic oil pump (18).

3. The sealed dynamic performance test platform of claim 2, wherein, The third seal (6) is installed on the right guide sleeve (8), and the fourth seal (9) is arranged between the right guide sleeve (8) and the shaft cylinder (12); the cooperation mode of the left guide sleeve (14) and the shaft cylinder (12) is mirror-symmetrical with the right guide sleeve (8).

4. The sealed dynamic performance test platform of claim 1, wherein, The high-speed reciprocating driving device includes a servo motor (2) and a transmission shaft (3), the transmission shaft (3) is hinged with the experimental shaft (4), the servo motor (2) is started, and the experimental shaft (4) is driven to reciprocate linearly through the transmission shaft (3).

5. The sealed dynamic performance test platform of claim 1, wherein, The temperature control device I can control the air temperature in the environmental box (1) to be between-70℃-200℃.

6. The sealed dynamic performance test platform of claim 1, wherein, The temperature control device II is used for controlling the oil temperature to be between-70℃-200℃, and the base (22), the shaft cylinder (12) and the experimental shaft (4) are communicated, and oil pressure is provided.

7. The sealed dynamic performance test platform of claim 1, wherein, The leakage detection device comprises a measuring cylinder (19) and an infrared induction counter (20), the measuring cylinder (19) is located directly below the inverted funnel structure and is used for receiving the oil droplet leakage, the infrared induction counter (20) can collect the data of the oil droplet leakage amount and the oil droplet leakage speed, and the dynamic sealing performance of the to-be-tested sealing piece (10) is evaluated according to the oil droplet leakage amount and the oil droplet leakage speed.

8. The sealed dynamic performance test platform of claim 1, wherein, The shaft cylinder (12) is connected with the base (22) through a lower opening and is positioned through a positioning pin (11) and is fixed through a first connector (13); the positioning pin (11) is fixed on the base (22).

9. The sealed dynamic performance test platform of claim 1, wherein, An upper part of the right guide sleeve (8) is provided with an air outlet hole (7), and the atmosphere outside the environment box (1) is communicated through a pipeline.

Images