Testing method for realizing ultra-high-speed reciprocating motion of sealing element

Abstract

The invention provides a test method for realizing ultra-high-speed reciprocating motion of a sealing element, which comprises the following steps of: (1) opening a corresponding control valve, starting a high-pressure oil pump to supply high-pressure oil to an energy storage cylinder to 90MPa and compressing a disc spring group; (2) corresponding control valves are controlled, a disc spring set is released instantly to push hydraulic oil of an energy storage cylinder to the upper end or the lower end of a test cylinder instantly, and a test piston rod moves at a high speed; (3) in the high-speed movement process of the test piston rod, the computer control system collects the displacement value of the laser displacement sensor at a high speed, a time-displacement curve is generated, and the accelerated speed and the maximum speed are calculated through the relation between time and displacement; or the acceleration and the maximum speed are calculated through the collected historical data. The device is efficient and reliable, the ultra-high-speed reciprocating motion of the sealing element is realized, and the durability verification of the reciprocating sealing element at the limit speed is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing component testing, and in particular to a testing method for achieving ultra-high-speed reciprocating motion of a sealing component. Background Art

[0002] Seals are widely used in various fields, including civil, industrial, and aerospace. With the increasing localization of seals, the requirements for seal testing methods are becoming increasingly stringent. Various industries in China are competing to develop durability testing for reciprocating seals, but there are no effective methods for testing at linear speeds exceeding 10m / s. Currently, the maximum linear speed for reciprocating seal testing in China is around 5m / s. Summary of the Invention

[0003] The technical problem solved by the present invention is to provide a testing method for realizing ultra-high-speed reciprocating motion of a seal, so as to solve the problems raised in the above-mentioned background technology.

[0004] The technical problem solved by the present invention is achieved by the following technical solution: A testing method for realizing ultra-high-speed reciprocating motion of a seal comprises the following steps:

[0005] Step (1). Open the corresponding control valve, start the high-pressure oil pump to supply high-pressure oil to the energy storage cylinder to 90MPa and compress the disc spring group;

[0006] Step (2). Operate the corresponding control valve, release the disc spring group instantly and push the hydraulic oil of the energy storage cylinder to the upper or lower end of the test cylinder, and the test piston rod moves at high speed;

[0007] Step (3). During the high-speed movement of the test piston rod, the computer control system collects the displacement value of the laser displacement sensor at high speed, generates a time-displacement curve, and calculates the acceleration and maximum speed through the relationship between time and displacement; the acceleration and maximum speed can also be calculated through the collected historical data.

[0008] Furthermore, the equipment of the testing method includes: a test piston rod, a test piston rod seal is provided at the upper end of the test piston rod, a test piston seal is provided at the lower end of the test piston rod, a piston housing is provided on the outside of the test piston rod, a laser displacement sensor is provided on the upper side of the test piston rod, a hydraulic buffer zone is provided in the piston housing on one side of the test piston rod, a control valve is provided on one side of the piston housing, and a high-pressure oil pump and an energy storage cylinder are connected to the control valve.

[0009] Furthermore, an end cover static seal is provided at the lower end of the test piston rod, and a hydraulic buffer zone is provided between the lower end of the test piston rod and the piston housing.

[0010] Furthermore, an energy storage cylinder piston is provided in the energy storage cylinder, and a disc spring group is provided at the lower end of the energy storage cylinder piston.

[0011] Furthermore, a piston rod installation cavity is provided in the piston housing, a hydraulic through groove is provided on the piston housing, and a sealing installation groove is provided in the piston housing.

[0012] Compared with the prior art, the present invention has the following beneficial effects: the present invention is efficient and reliable, realizes ultra-high-speed reciprocating motion of the seal, and completes the durability verification of the reciprocating application seal at the extreme speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0014] In order to make the technical means for realizing the present invention, the creative features, the purpose and the effect easily understood, the present invention is further described below with reference to specific diagrams. In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components.

[0015] Example 1

[0016] like Figure 1 As shown, a test method for realizing ultra-high-speed reciprocating motion of a seal comprises the following steps:

[0017] Step (1). Open the corresponding control valve, start the high-pressure oil pump to supply high-pressure oil to the energy storage cylinder to 90MPa and compress the disc spring group;

[0018] Step (2). Operate the corresponding control valve, release the disc spring group instantly and push the hydraulic oil of the energy storage cylinder to the upper or lower end of the test cylinder, and the test piston rod moves at high speed;

[0019] Step (3). During the high-speed movement of the test piston rod, the computer control system collects the displacement value of the laser displacement sensor at high speed, generates a time-displacement curve, and calculates the acceleration and maximum speed through the relationship between time and displacement; the acceleration and maximum speed can also be calculated through the collected historical data.

[0020] The equipment for the test method includes: a test piston rod 9, a test piston rod seal 11 is provided at the upper end of the test piston rod 9, a test piston seal 8 is provided at the lower end of the test piston rod 9, a piston housing is provided on the outside of the test piston rod 9, a laser displacement sensor 12 is provided on the upper side of the test piston rod 9, a hydraulic buffer zone 10 is provided in the piston housing on one side of the test piston rod 9, a control valve 5 is provided on one side of the piston housing, and a high-pressure oil pump 4 and an energy storage cylinder 3 are connected to the control valve 5. The lower end of the test piston rod 9 is provided with an end cap static seal 7, and a hydraulic buffer zone 6 is provided between the lower end of the test piston rod 9 and the piston housing.

[0021] Example 2

[0022] like Figure 1 As shown, a test method for achieving ultra-high-speed reciprocating motion of a seal includes: a test piston rod 9, a test piston rod seal 11 provided at the upper end of the test piston rod 9, a test piston seal 8 provided at the lower end of the test piston rod 9, a piston housing provided on the outer side of the test piston rod 9, a laser displacement sensor 12 provided on the upper side of the test piston rod 9, a hydraulic buffer 10 provided in the piston housing on one side of the test piston rod 9, a control valve 5 provided on one side of the piston housing, a high-pressure oil pump 4 and an energy storage cylinder 3 connected to the control valve 5. The energy storage cylinder 3 is provided with an energy storage cylinder piston 2, and the lower end of the energy storage cylinder piston 2 is provided with a disc spring assembly 1.

[0023] Example 3

[0024] like Figure 1 As shown, a test method for achieving ultra-high-speed reciprocating motion of a seal includes: a test piston rod 9, a test piston rod seal 11 provided at the upper end of the test piston rod 9, a test piston seal 8 provided at the lower end of the test piston rod 9, a piston housing provided on the outer side of the test piston rod 9, a laser displacement sensor 12 provided on the upper side of the test piston rod 9, a hydraulic buffer 10 provided in the piston housing on one side of the test piston rod 9, a control valve 5 provided on one side of the piston housing, and a high-pressure oil pump 4 and an energy storage cylinder 3 connected to the control valve 5. A piston rod mounting cavity is provided in the piston housing, a hydraulic through groove is provided in the piston housing, and a seal mounting groove is provided in the piston housing.

[0025] The testing process of the present invention is as follows:

[0026] 1) Open the corresponding control valve, start the high-pressure oil pump to supply high-pressure oil to the energy storage cylinder to 90MPa and compress the disc spring group;

[0027] 2) Operate the corresponding control valve, the disc spring group is instantly released to instantly push the hydraulic oil in the energy storage cylinder to the upper or lower end of the test cylinder, and the test piston rod moves at high speed;

[0028] 3) During the high-speed movement of the test piston rod, the computer control system collects the displacement value of the laser displacement sensor at high speed, generates a time-displacement curve, and calculates the acceleration and maximum speed based on the relationship between time and displacement; the acceleration and maximum speed can also be calculated based on the collected historical data.

[0029] The high-pressure oil pump of the present invention outputs high-pressure oil to push the piston of the energy storage hydraulic cylinder downward, thereby compressing the high-strength disc spring mechanism to store energy. The high-strength disc spring group can store huge energy. After the energy storage is completed, the energy stored in the disc spring is used to push the energy storage piston to move upward instantly. The oil in the energy storage piston cylinder is instantly pushed into the test cylinder equipped with the seal, thereby realizing ultra-high-speed movement of the seal.

[0030] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test method for realizing ultra-high-speed reciprocating motion of a seal, comprising the following steps: Step (1). Open the corresponding control valve, start the high-pressure oil pump to supply high-pressure oil to the energy storage cylinder to 90MPa and compress the disc spring group; Step (2). Operate the corresponding control valve, release the disc spring group instantly and push the hydraulic oil of the energy storage cylinder to the upper or lower end of the test cylinder, and the test piston rod moves at high speed; Step (3). During the high-speed movement of the test piston rod, the computer control system collects the displacement value of the laser displacement sensor at high speed, generates a time-displacement curve, and calculates the acceleration and maximum speed through the relationship between time and displacement; or calculates the acceleration and maximum speed through the collected historical data.

2. A test method for achieving ultra-high-speed reciprocating motion of a seal according to claim 1, characterized in that: The equipment of the test method includes: a test piston rod (9), characterized in that: a test piston rod seal (11) is provided at the upper end of the test piston rod (9), a test piston seal (8) is provided at the lower end of the test piston rod (9), a piston housing is provided on the outer side of the test piston rod (9), a laser displacement sensor (12) is provided on the upper side of the test piston rod (9), a hydraulic buffer zone (10) is provided in the piston housing on one side of the test piston rod (9), a control valve (5) is provided on one side of the piston housing, and a high-pressure oil pump (4) and an energy storage cylinder (3) are connected to the control valve (5).

3. A test method for achieving ultra-high-speed reciprocating motion of a seal according to claim 2, characterized in that: The lower end of the test piston rod (9) is provided with an end cover static seal (7), and a hydraulic buffer zone (6) is provided between the lower end of the test piston rod (9) and the piston housing.

4. A test method for achieving ultra-high-speed reciprocating motion of a seal according to claim 2, characterized in that: An energy storage cylinder piston (2) is provided in the energy storage cylinder (3), and a disc spring assembly (1) is provided at the lower end of the energy storage cylinder piston (2).

5. The method for testing a seal to achieve ultra-high-speed reciprocating motion according to claim 2, characterized in that: A piston rod installation cavity is provided in the piston housing, a hydraulic through groove is provided on the piston housing, and a sealing installation groove is provided in the piston housing.

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