Sealing dynamic performance experiment test platform

Abstract

The invention discloses a sealing dynamic performance experiment test platform which comprises an environment box, an experiment sleeve, a hydraulic oil pump, a high-speed reciprocating device and a leakage detection device, a temperature control device I and a base are arranged in the environment box, a temperature sensor probe is arranged in the base, and the experiment sleeve comprises a left guide sleeve, a shaft sleeve and a right guide sleeve. A left guide sleeve and a right guide sleeve are arranged between the shaft barrel and the base, a seal is arranged between the left guide sleeve and the right guide sleeve, a coaxial through hole is axially formed between the left guide sleeve and the right guide sleeve, a to-be-tested sealing piece is arranged between the shaft barrel and the base, an oil supply pipeline and an oil return pipeline are arranged between the shaft barrel and the base and provided with a seal, and the oil supply pipeline and the oil return pipeline are both communicated with a hydraulic oil pump containing a temperature control device II. The lower portions of the left guide sleeve and the right guide sleeve are respectively provided with an inverted funnel structure and a middle inclined notch. The device can provide single or multi-working-condition combined simulated use working conditions such as high temperature, high pressure, high speed, pulse, low temperature and reciprocation, measure the leakage rate in real time, and realize data measurement and performance evaluation of hydraulic reciprocating dynamic sealing.

Description

Technical Field

[0001] The invention relates to the technical field of sealing, and in particular to a sealing dynamic performance experimental testing platform. Background Art

[0002] Hydraulic transmission is a transmission method that uses liquid as the working medium for energy transmission and control. The premise of hydraulic transmission is that the liquid needs to be confined in a limited and controllable space, but joints and transition positions are key areas for liquid leakage and pressure reduction. Selecting and designing suitable seals for joints and transition positions is an important content of continuous attention and research in the field of hydraulic transmission.

[0003] There are many evaluation and testing methods for hydraulic sealing effects, including appearance, size, force, pressure, etc., but they are ultimately directly or indirectly reflected in the amount and rate of liquid leakage. Factors affecting leakage include materials, structure, high and low temperature environment, oil pressure, pulse, reciprocating speed, etc. The single influence of the above factors, the weight of each factor after compounding, and the coupling results under complex conditions of multiple factors are all factors that need to be considered in the hydraulic reciprocating seal experimental test platform.

[0004] Existing sealing performance testing platforms have problems such as incomplete coverage of leakage factors or excessive correlation of multiple factors, making it impossible to decouple and analyze them. Summary of the invention

[0005] In order to solve the technical problems existing in the background technology, the present invention proposes a sealing dynamic performance experimental testing platform.

[0006] The present invention proposes a sealing dynamic performance experimental test platform, comprising an environmental box 1 provided with a temperature control device I inside, a base 22 is fixed to the bottom wall of the environmental box 1, a temperature sensor probe 23 is provided inside the base 22, and the environmental box 1 includes:

[0007] The test sleeve comprises a shaft cylinder 12 fixed to the upper end of the base 22, the two ends of the shaft cylinder 12 are respectively connected to a left guide sleeve 14 and a right guide sleeve 8, the axial through hole of the shaft cylinder 12 is provided with a test shaft 4, the seal 10 to be tested is installed between the shaft cylinder 12 and the left guide sleeve 14, and between the shaft cylinder and the right guide sleeve 8, the middle interior of the shaft cylinder is connected to a hydraulic oil pump 18 located outside the environmental box 1 through a pipeline, and the hydraulic oil pump 18 is provided with a temperature control device II, and the lower parts of the left guide sleeve 14 and the right guide sleeve 8 are provided with an anti-funnel structure and a middle inclined notch 21 which are connected to the outside of the environmental box 1 and are used to guide the flow direction of the 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 anti-funnel structure, and is used to receive the leaked oil droplets and complete the data collection of the oil droplet leakage amount and oil droplet leakage speed. In various environmental condition tests, if the seal 10 to be tested is not sealed well, the leaked oil droplets will flow into the leakage detection device through the anti-funnel structure and the middle inclined notch 21.

[0010] Preferably, 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. An oil inlet 24 and an oil outlet 25 are opened in the middle of the shaft cylinder 12. The oil inlet 24 is connected to the oil supply pipeline of the base 22 and is installed with a first seal 26. The oil outlet 25 is connected to the oil return pipeline of the base 22 and is installed with a second seal 27. The oil supply pipeline and the oil return pipeline are both 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 mode between the left guide sleeve 14 and the shaft cylinder 12 is mirror-symmetrical with the right guide sleeve 8.

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

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

[0014] Preferably, the temperature control device II is used to control the oil temperature between -70°C and 200°C, and is connected to the test 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 sensing counter 20. The measuring cylinder 19 is located directly below the anti-funnel structure and is used to collect leaked oil droplets. The infrared sensing counter 20 can complete data collection of oil droplet leakage volume and oil droplet leakage speed, and evaluate the dynamic sealing performance of the seal 10 to be tested based on the oil droplet leakage volume and oil droplet leakage speed.

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

[0017] Preferably, an air outlet 7 is opened at the upper portion of the right guide sleeve 8, which is connected to the atmosphere outside the environmental box 1 through a pipeline.

[0018] In summary, the present invention has the following beneficial effects: by controlling the air temperature in the environmental box through the temperature control device I and the oil temperature of the hydraulic oil through the temperature control device II, and then cooperating with the high-speed reciprocating drive device, it is possible to simulate a variety of different types of environmental working conditions such as high temperature, high pressure, high speed, pulse, low temperature, reciprocating, etc., to detect the sealing performance of the seal to be tested, and to detect the oil leakage amount and leakage rate in real time, to provide data support for the measurement and evaluation of the sealing effect, and to realize the data measurement and performance evaluation of the hydraulic reciprocating dynamic seal.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 2 It is a schematic diagram of the structure of the connection part between the shaft cylinder and the base according to an embodiment of the present invention.

[0022] In the figure:

[0023] 1. Environmental chamber; 2. Servo motor; 3. Drive shaft; 4. Experimental shaft; 5. Right oil-free bushing; 6. Third seal; 7. Air outlet; 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 induction counter; 21. Middle inclined notch; 22. Base; 23. Temperature sensor probe; 24. Oil inlet; 25. Oil outlet; 26. First seal; 27. Second seal. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

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

[0026] The test sleeve comprises a shaft cylinder 12 fixed to the upper end of the base 22, the two ends of the shaft cylinder 12 are respectively connected to the left guide sleeve 14 and the right guide sleeve 8, the axial through hole of the shaft cylinder 12 is penetrated by the test shaft 4 (wherein, the aperture of the axial through hole of the shaft cylinder 12 is slightly larger than the diameter of the test shaft 4), and the seal 10 to be tested is installed between the shaft cylinder 12 and the left guide sleeve 14, and between the shaft cylinder and the right guide sleeve 8. Specifically, the lower part of the left guide sleeve 14 is provided with a right boss extending to the right, the right boss is coaxially matched with the axial through hole of the shaft cylinder 12, and the seal 10 to be tested is installed between the right boss and the axial through hole of the shaft cylinder 12. Part 10, a boss extending to the left is provided at the lower part of the right guide sleeve 8, the boss is coaxially matched with the axial through hole of the shaft cylinder 12, a 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, and the hydraulic oil pump 18 is provided with a temperature control device II, and the lower parts of the left guide sleeve 14 and the right guide sleeve 8 are both provided with an anti-funnel structure and a middle inclined notch 21 connected to the outside of the environmental box 1 for guiding the flow direction of the leaked oil, and the anti-funnel structure and the middle inclined notch 21 guide the flow direction of the leaked oil and prevent the oil from being sucked back;

[0027] The temperature sensor probe 23 is used to measure the temperature of the test sleeve.

[0028] Specifically, the shaft cylinder 12 is connected to the base 22 through the lower opening, is positioned by the positioning pin 11, and is fixed by the first connection 13; the positioning pin 11 is fixed on the base 22, which can ensure the 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 provided with a conversion 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. The servo motor 2 is started, and the experimental shaft 4 is driven to reciprocate linearly through the transmission shaft 3. The specific transmission structure and transmission mode can refer to the existing structure, and will not be repeated in this article.

[0032] The leakage detection device is located directly below the anti-funnel structure and is used to receive the leaked oil droplets and complete the data collection of the oil droplet leakage amount and oil droplet leakage speed. In various environmental condition tests, if the seal 10 to be tested is not sealed well, the leaked oil droplets will flow into the leakage detection device through the anti-funnel structure and the middle inclined notch 21.

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

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

[0035] In this way, by controlling the air temperature in the environmental box through the temperature control device I and the oil temperature of the hydraulic oil through the temperature control device II, and then cooperating with the high-speed reciprocating drive device, it is possible to simulate a variety of different types of environmental conditions (high temperature, high pressure, high speed, pulse, low temperature, reciprocating, etc., single or composite simulated use conditions) to detect the sealing performance of the seal to be tested, and detect the oil leakage amount and leakage rate in real time, provide data support for the measurement and evaluation of the sealing effect, and realize the data measurement and performance evaluation of the 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. An oil inlet 24 and an oil outlet 25 are opened in the middle of the shaft cylinder 12. The oil inlet 24 is connected to the oil supply pipeline of the base 22 and is installed with a first seal 26. The oil outlet 25 is connected to the oil return pipeline of the base 22 and is installed with a second seal 27. The oil supply pipeline and the oil return pipeline are both connected to the hydraulic oil pump 18.

[0037] Furthermore, an air outlet 7 is provided on the upper part of the right guide sleeve 8, and is connected to the atmosphere outside the environmental box 1 through a pipeline, wherein an air outlet is also provided on the upper part of the left guide sleeve 14, and is connected to the atmosphere outside the environmental box 1 through a pipeline. 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 matching mode of the left guide sleeve 14 and the shaft cylinder 12 is mirror-symmetrical with the right guide sleeve 8.

[0038] In this embodiment, the leakage detection device includes a measuring cylinder 19 and an infrared sensing counter 20. The measuring cylinder 19 is located directly below the anti-funnel structure and is used to collect leaked oil droplets. The infrared sensing counter 20 can complete data collection of oil droplet leakage volume and oil droplet leakage speed, and evaluate the dynamic sealing performance of the seal 10 to be tested based on the oil droplet leakage volume and oil droplet leakage speed.

[0039] The working principle is as follows: during the experiment, the temperature control device Ⅰ controls and adjusts the air temperature in the environmental box 1 to provide an external temperature environment for the experimental shaft and the seal to be tested, and the temperature control device Ⅱ of the hydraulic oil pump 18 controls the temperature of the pumped hydraulic oil to provide the internal temperature environment of the experimental shaft and the seal to be tested. The two temperature environments can be provided separately or jointly; the hydraulic oil pump 18 provides a stable oil pressure field through the oil supply pipeline, the base 22, and the oil inlet 24, or provides a pulse oil pressure field through the oil supply pipeline, the base 22, the oil inlet 24, the shaft cylinder 12, the oil outlet 25, and the return oil pipeline; the servo motor 2 provides a high-speed, reciprocating, and precise motion field through the transmission shaft 3 and the experimental shaft 4; at this time, the infrared induction counter measures the leakage rate in real time. In summary, through the above combination, it is possible to simulate a single or multiple working conditions such as high temperature, high pressure, high speed, pulse, low temperature, reciprocating, etc. The sealing effect of the seal 10 to be tested 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 to be tested is good and meets the requirements; if there is leakage in the measuring cylinder, the sealing performance of the seal 10 to be tested is evaluated based on the oil leakage amount and leakage rate.

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

[0041] Preferably, in order to facilitate control, a control device may be further provided in the present embodiment, and the control device may be communicatively connected with 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", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sealing dynamic performance experimental test platform, characterized in that: The invention comprises an environmental box (1) having a temperature control device I therein, a base (22) being fixed to the inner bottom wall of the environmental box (1), a temperature sensor probe (23) being arranged in the base (22), and the environmental box (1) comprising: The test sleeve comprises a shaft cylinder (12) fixed to the upper end of the base (22), the two ends of the shaft cylinder (12) are respectively connected to a left guide sleeve (14) and a right guide sleeve (8), the axial through hole of the shaft cylinder (12) is provided with a test shaft (4), the shaft cylinder (12) and the left guide sleeve (14) are provided with a seal (10) to be tested, the middle interior of the shaft cylinder is connected to a hydraulic oil pump (18) located outside the environmental box (1) through a pipeline, the hydraulic oil pump (18) is provided with a temperature control device II, and the lower parts of the left guide sleeve (14) and the right guide sleeve (8) are provided with an anti-funnel structure and a middle inclined notch (21) which are connected to the outside of the environmental box (1) and are used to guide the flow direction of the leaked oil; A high-speed reciprocating drive device connected to the right end of the experimental shaft (4) to drive the experimental shaft (4) to perform high-speed reciprocating motion along its axial direction; The leakage detection device is located directly below the anti-funnel structure and is used to receive leaked oil droplets and complete data collection of oil droplet leakage volume and oil droplet leakage speed. In various environmental condition tests, if the seal to be tested (10) is not sealed well, the leaked oil droplets will flow into the leakage detection device through the anti-funnel structure and the middle inclined notch (21).

2. The sealing dynamic performance experimental test platform according to claim 1 is characterized in that: 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). An oil inlet (24) and an oil outlet (25) are opened in the middle of the shaft cylinder (12). The oil inlet (24) is connected to the oil supply pipeline of the base (22) and is installed with a first seal (26). The oil outlet (25) is connected to the oil return pipeline of the base (22) and is installed with a second seal (27). The oil supply pipeline and the oil return pipeline are both connected to the hydraulic oil pump (18).

3. The sealing dynamic performance experimental test platform according to claim 2 is characterized in that: 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 matching mode of the left guide sleeve (14) and the shaft cylinder (12) is mirror-symmetrical with the right guide sleeve (8).

4. The sealing dynamic performance experimental test platform according to claim 1 is characterized in that: The high-speed reciprocating drive device comprises 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 perform reciprocating linear motion through the transmission shaft (3).

5. The sealing dynamic performance experimental test platform according to claim 1 is characterized in that: The temperature control device I can control the air temperature inside the environmental box (1) to be between -70°C and 200°C.

6. The sealing dynamic performance experimental test platform according to claim 1 is characterized in that: The temperature control device II is used to control the oil temperature between -70°C and 200°C, and is connected to the test shaft (4) through the base (22) and the shaft cylinder (12) to provide oil pressure.

7. The sealing dynamic performance experimental test platform according to claim 1 is characterized in that: The leakage detection device comprises a measuring cylinder (19) and an infrared sensing counter (20). The measuring cylinder (19) is located directly below the anti-funnel structure and is used to receive leaked oil droplets. The infrared sensing counter (20) can complete data collection of oil droplet leakage volume and oil droplet leakage speed, and evaluate the dynamic sealing performance of the seal (10) to be tested based on the oil droplet leakage volume and oil droplet leakage speed.

8. The sealing dynamic performance experimental test platform according to claim 1 is characterized in that: The shaft cylinder (12) is connected to the base (22) through a lower opening, positioned by a positioning pin (11), and fixed by a first connection (13); the positioning pin (11) is fixed on the base (22).

9. The sealing dynamic performance experimental test platform according to claim 1, characterized in that: An air outlet (7) is provided on the upper portion of the right guide sleeve (8), which is connected to the atmosphere outside the environmental box (1) via a pipeline.

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