Leakage and adhesion testing tool for rubber sealing element

Abstract

The utility model discloses a tool for testing leakage and adhesion of a rubber sealing element, which integrates a leakage test function and an adhesion test function, simulates the actual working environment of the sealing element by using a test medium supply system capable of accurately controlling pressure, and drives a pressing plate assembly with a profiling pressing head through a lifting mechanism. Automatic pressing and separation of the sealing element in a simulated assembly state are achieved, comprehensive detection of the sealing performance and the anti-adhesion characteristic of the rubber sealing element can be completed without a machine, and pressure attenuation and separation force of a test medium are monitored in real time through a pressure sensor and a tension sensor. According to the invention, quantitative judgment on leakage and adhesion degree is realized, so that the detection capability and the evaluation accuracy of early quality defects of the rubber sealing element are remarkably improved, a reliable basis is provided for quality control and process optimization in the production process, and the delivery quality and the use reliability of products are fundamentally guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rubber production technical field relates to the performance test of rubber seal, specifically is a kind of rubber seal leakage and test tool of adhesion. BACKGROUND

[0002] Rubber seal is widely used in various hydraulic, pneumatic and rotary motion devices, and its performance directly affects the sealing reliability and service life of equipment. In actual use, two typical failure modes often occur in lip-shaped rubber seals: one is medium leakage, i.e. the sealing lip cannot effectively prevent the leakage of working medium; the other is adhesion, i.e. the sealing lip adheres to the mating surface under the action of pressure or temperature, resulting in increased movement resistance, damaged sealing surface or abnormally increased starting force.

[0003] Currently, the industry's testing of lip-shaped rubber seals mainly focuses on conventional sealing performance tests, and there is a lack of special testing devices for the two specific failure modes of "leakage" and "adhesion". Moreover, existing testing devices have single testing modes and fixed testing parameters, cannot simulate complex working conditions, and are difficult to reflect actual working conditions. This makes it impossible for production enterprises to simulate actual working conditions and conduct targeted testing before the products are shipped, resulting in the flow of sealing elements with quality problems into subsequent assembly links, and further affecting the reliability, stability and service life of the entire machine equipment. UTILITY MODEL CONTENTS

[0004] To solve the technical problems in the background art, the utility model provides a rubber seal leakage and adhesion test tool that can simulate actual working conditions and is specifically used for testing the leakage and adhesion performance of lip-shaped rubber seals.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A rubber seal leakage and adhesion test tool, comprising: a base, a test medium container, a pressure plate assembly, and a lifting mechanism. The test medium container is arranged at the bottom of the base to hold the test medium. The test medium container has a sealing groove that is compatible with the rubber seal to be tested. The pressure plate assembly is arranged above the test medium container to accommodate and clamp the rubber seal to be tested. The lifting mechanism is vertically installed at the top of the base and is drivingly connected to the pressure plate assembly to vertically lower the pressure plate assembly, press the rubber seal into the sealing groove of the test medium container, detect whether the test medium leaks, or vertically raise the pressure plate assembly to separate the rubber seal from the sealing groove of the test medium container, and detect the driving force required for separation.

[0007] Further, the test tool further comprises a test medium supply mechanism connected with the test medium container to inject the test medium with a preset pressure into the test medium container to simulate the working environment of the rubber seal to be tested, and a pressure sensor is arranged in the test medium container to monitor the pressure attenuation in the test medium container during the vertical descending of the pressing plate assembly to determine whether the test medium leaks.

[0008] Further, the test medium supply mechanism comprises a medium storage tank, a pump body, a pipeline and a control valve, and the medium storage tank is connected with the pump body, the control valve and the test medium container in sequence through the pipeline to inject the test medium with a preset pressure into the test medium container.

[0009] Further, the test medium supply mechanism further comprises a heater to heat the test medium output by the medium storage tank to a preset temperature before being injected into the test medium container.

[0010] Further, a tension sensor is installed on the lifting mechanism to detect the driving force of the lifting mechanism during the vertical ascending of the pressing plate assembly and the adhesion force of the test rubber seal in the sealing groove of the test medium container.

[0011] Further, the pressing plate assembly comprises a pressing plate and a profiling pressure head, the pressing plate is connected to the output end of the lifting mechanism, and the profiling pressure head is installed at the bottom of the pressing plate and matches the shape of the rubber seal to be tested.

[0012] Further, the profiling pressure head comprises an upper plate body, a mounting groove and a lower plate body, the mounting groove matches the shape of the rubber seal to be tested to mount the rubber seal to be tested between the upper plate body and the lower plate body, the rubber seal to be tested is pressed into the sealing groove of the test medium container through the upper plate body, and the rubber seal to be tested is separated from the sealing groove of the test medium container through the lower plate body.

[0013] Further, a motor is arranged between the pressing plate and the profiling pressure head, the motor is fixedly installed at the bottom of the pressing plate, and the motor is drivingly connected with the profiling pressure head to drive the profiling pressure head to rotate.

[0014] Further, a mounting hole is arranged in the middle of the profiling pressure head, an output shaft of the motor passes through the mounting hole to connect with a locking nut, a limiting piece is arranged on the peripheral side of the output shaft of the motor, and a limiting groove corresponding to the limiting piece is arranged on the peripheral side of the mounting hole, so that when the output shaft of the motor passes through the mounting hole, the limiting piece is adapted to be inserted into the corresponding limiting groove.

[0015] Further, the output shaft of the motor is gap-fitted with the mounting hole of the profiling pressure head, and a vibrator is installed on the profiling pressure head.

[0016] The utility model discloses a rubber sealing element leak and adhesion test frock, leak test and adhesion test function are integrated in one, utilize the test medium supply system of accurate control pressure to simulate the actual working environment of sealing element, and through the lifting mechanism drive the platen assembly with the profiling pressure head, realize the automatic compression and separation of sealing element in the simulation assembly state, not only can complete the comprehensive detection of the sealing performance and the anti -adhesion characteristic of rubber sealing element under the condition of not on -machine, and through pressure sensor and tension sensor respectively to test medium pressure attenuation and separation force carry out real -time monitoring, realize the quantitative judgment of leak and whether the adhesion degree, thereby significantly improve the detection ability and evaluation accuracy of early quality defect of rubber sealing element, provide reliable basis for the quality control and process optimization of production process, fundamentally guarantee the factory quality and use reliability of product. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structural schematic diagram of the utility model.

[0018] Figure 2 It is the schematic diagram of platen assembly of the utility model.

[0019] Figure 3 It is the sectional view of profiling pressure head of the utility model.

[0020] Figure 4 It is the plan view of profiling pressure head of the utility model. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, obviously, the described embodiments only are a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor all belong to the range of the utility model protection.

[0022] As Figure 1As shown, the utility model provides a kind of rubber sealing element leakage and test tool of adhesion, comprising: pedestal 1, test medium container 2, pressing plate assembly 3, lifting mechanism 4 and test medium supply mechanism.Wherein, test medium container 2 is arranged at the bottom of pedestal 1, to hold test medium, test medium container 2 has the sealing groove 21 compatible with the rubber sealing element 5 to be tested on it.Pressing plate assembly 3 is arranged above test medium container 2, to adapt to the clamping rubber sealing element 5 to be tested.Lifting mechanism 4 is vertically installed on the top of pedestal 1, and lifting mechanism 4 is driven to connect pressing plate assembly 3, to drive pressing plate assembly 3 vertically rise or descend: when lifting mechanism 4 drives pressing plate assembly 3 vertically descend, pressing plate assembly 3 is compatible with test medium container 2 and is docked, and the rubber sealing element 5 clamped on pressing plate assembly 3 is pressed into the sealing groove 21 of test medium container 2, whether test medium in test medium container 2 leaks is detected, to realize the leakage test of rubber sealing element 5: when lifting mechanism 4 drives pressing plate assembly 3 vertically rise, pressing plate assembly 3 is separated from test medium container 2, and the rubber sealing element 5 clamped on pressing plate assembly 3 is separated from the sealing groove 21 of test medium container 2, and the driving force required in the separation process is detected, to realize the adhesion test of rubber sealing element 5.Summarizing above, the present application realizes the assembly, pressurization, test and separation whole process of rubber sealing element 5 on the same test tool, and significantly improves test efficiency and consistency.

[0023] Specifically, test medium supply mechanism is connected with test medium container 2, to inject test medium of preset pressure into test medium container 2, to simulate the working environment of rubber sealing element 5 to be tested.Pressure sensor is arranged in test medium container 2, to monitor the pressure attenuation in test medium container 2 in the process that pressing plate assembly 3 vertically descend, to judge whether test medium leaks, to realize quantitative detection of leakage condition.

[0024] In the embodiment, test medium uses oil, and test medium supply mechanism includes: oil tank, oil pump, pipeline, pressure regulating valve, heater, and the oil tank is sequentially connected with oil pump, pressure regulating valve, heater and test medium container 2 through pipeline, and the oil in the oil tank is injected into test medium container 2 by oil pump, the oil pressure in test medium container 2 is adjusted by pressure regulating valve, to inject oil of preset pressure into test medium container 2, and the oil output from the oil tank is heated to preset temperature by heater before being injected into test medium container 2, to realize independent adjustment of test pressure and temperature, can simulate different working conditions, enhance the coverage and accuracy of test, and can simulate the performance change of rubber sealing element 5 in high temperature working environment, make test more engineering representative, especially suitable for evaluating the sealing stability and anti-adhesion characteristics of rubber material at different temperatures.

[0025] The tension sensor is installed on the lifting mechanism 4 to accurately measure the driving force of the lifting mechanism 4 during the vertical lifting of the pressing plate assembly 3, to collect the separation force curve in real time, to accurately capture the maximum tension at the moment when the rubber sealing element 5 is separated from the sealing groove 21 of the test medium container 2, and to obtain the adhesion force of the rubber sealing element 5. By comparing the adhesion force with the standard threshold, it can be judged whether the anti-adhesion performance of the rubber sealing material is qualified, and the quantitative evaluation of the adhesion strength of the rubber sealing material is realized, which provides reliable data support for material selection and process optimization.

[0026] As shown in Figure 2 , the pressing plate assembly 3 comprises a pressing plate 31 and a profiling head 32, the pressing plate 31 is connected to the output end of the lifting mechanism 4, and the profiling head 32 is installed at the bottom of the pressing plate 31. The profiling head 32 is matched with the shape of the rubber sealing element 5 to be tested, which ensures that the pressure is uniformly applied to the sealing lip of the rubber sealing element 5, avoids measurement errors or damage to the rubber sealing element 5 caused by local stress concentration, and improves the safety and repeatability of the test.

[0027] Specifically, as shown in Figures 3-4 , the profiling head 32 comprises an upper plate body 321, a mounting groove 322 and a lower plate body 323. The mounting groove 322 is matched with the shape of the rubber sealing element 5 to be tested, so as to install the rubber sealing element 5 to be tested between the upper plate body 321 and the lower plate body 323. The rubber sealing element 5 to be tested is pressed into the sealing groove 21 of the test medium container 2 through the upper plate body 321, and the rubber sealing element 5 to be tested is separated from the sealing groove 21 of the test medium container 2 through the lower plate body 323.

[0028] A motor 6 is arranged between the pressing plate 31 and the profiling head 32. The motor 6 is fixedly installed at the bottom of the pressing plate 31, and the motor 6 is drivingly connected with the profiling head 32 to drive the profiling head 32 to rotate, so as to simulate the performance change of the rubber sealing element 5 under the condition of rotating under circumferential force, expand the test dimension, evaluate the adhesion behavior of the rubber sealing element 5 under dynamic conditions, and enhance the comprehensive evaluation ability of the test tool.

[0029] Among them, the middle part of the profiling head 32 is provided with a mounting hole 324, and the output shaft of the motor 6 passes through the mounting hole 324 and is connected with a locking nut 33, so as to realize the detachable installation of the profiling head 32 on the motor 6, facilitate the quick replacement of the profiling head 32, adapt to the test requirements of different specifications of rubber sealing elements 5, and improve the universality and use flexibility of the test tool.

[0030] Specifically, the output shaft of the motor 6 is provided with a limiting piece 61, and the circumferential side of the mounting hole 324 is provided with a limiting groove 325 corresponding to the limiting piece 61, so that when the output shaft of the motor 6 passes through the mounting hole 324, the limiting piece 61 is inserted into the corresponding limiting groove 325, so that the motor 6 can drive the profiling head 32 to rotate.

[0031] The output shaft of the motor 6 is in clearance fit with the mounting hole 324 of the profiling pressure head 32, and the vibrator 7 is mounted on the profiling pressure head 32, so that micro-vibration can be introduced during the test, simulating the mechanical vibration environment of the rubber seal 5 in actual use, helping to evaluate the adhesion and leakage of the rubber seal 5 under vibration, and making the test condition more comprehensive and real.

[0032] The lifting mechanism 4 adopts a servo electric cylinder or a precision pneumatic cylinder, and can accurately control the pressing stroke, speed and holding pressure. The driving shaft of the lifting mechanism 4 is connected with a guide sliding block 41, and a movement guide rail 42 is vertically mounted in the middle of the base 1. The two ends of the movement guide rail 42 are respectively connected with the bottom and the top of the base 1. The guide sliding block 41 is slidingly connected with the movement guide rail 42, so as to ensure that the driving shaft of the lifting mechanism 4 moves in high-precision reciprocating linear motion along the vertical direction, significantly improves the repeat positioning accuracy of the pressure applying and separating actions during the test process, and guarantees the stability of the test data.

[0033] The above is only an example and description of the structure of the utility model, and those skilled in the art can make various modifications or supplements or adopt similar ways to replace the described specific embodiments, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the present claims, which shall belong to the protection scope of the utility model.

Claims

1. A rubber seal leakage and blocking test fixture, characterized by, The utility model relates to a rubber seal test device, including: Base (1), test medium container (2), pressing plate assembly (3), lifting mechanism (4), test medium container (2) is set up in the bottom of base (1) to hold test medium, test medium container (2) has the sealing groove (21) on the compatible rubber seal (5) to be tested with to be tested, pressing plate assembly (3) is set up above test medium container (2) to adapt to clamp rubber seal (5) to be tested, lifting mechanism (4) is vertically installed in the top of base (1), lifting mechanism (4) drive connection pressing plate assembly (3), to drive pressing plate assembly (3) vertically descend, and rubber seal (5) is pressed into the sealing groove (21) of test medium container (2), detects whether test medium leaks, or drive pressing plate assembly (3) vertically rise, and rubber seal (5) is separated from the sealing groove (21) of test medium container (2), and the driving force required for separation is detected.

2. The test fixture of claim 1, wherein, Also includes: Test medium supply mechanism, test medium supply mechanism is connected with test medium container (2) to inject the test medium of preset pressure in test medium container (2), simulates the working environment of rubber seal (5) to be tested, and test medium container (2) is equipped with pressure sensor to monitor the pressure attenuation in test medium container (2) during the vertical descent of pressing plate assembly (3), and whether test medium leaks is judged.

3. The test fixture of claim 2, wherein, Test medium supply mechanism includes: medium storage tank, pump body, pipeline, control valve, medium storage tank is connected in proper order with pump body, control valve and test medium container (2) through pipeline to inject the test medium of preset pressure in test medium container (2).

4. The test fixture of claim 3, wherein, Test medium supply mechanism also includes: heater, to heat the test medium of medium storage tank output to preset temperature before injection in test medium container (2).

5. The test fixture of claim 1, wherein, Lifting mechanism (4) is installed with tension sensor to detect the driving force of lifting mechanism (4) during the vertical rise of pressing plate assembly (3), the adhesion force of test rubber seal (5) in test medium container (2) sealing groove (21).

6. The test fixture of claim 1, wherein, Pressing plate assembly (3) includes: pressing plate (31), profiling pressure head (32), pressing plate (31) is connected in the output end of lifting mechanism (4), profiling pressure head (32) is installed in the bottom of pressing plate (31), and profiling pressure head (32) is matched with the shape of rubber seal (5) to be tested.

7. The test fixture of claim 6, wherein, Profiling pressure head (32) includes: upper plate body (321), installation groove (322), lower plate body (323), installation groove (322) is matched with the shape of rubber seal (5) to be tested to install rubber seal (5) to be tested between upper plate body (321) and lower plate body (323), and rubber seal (5) to be tested is pressed into the sealing groove (21) of test medium container (2) through upper plate body (321), and rubber seal (5) to be tested is separated from the sealing groove (21) of test medium container (2) through lower plate body (323).

8. The test fixture of claim 6, wherein, Motor (6) is arranged between pressing plate (31) and profiling pressure head (32), motor (6) is fixedly installed in the bottom of pressing plate (31), motor (6) drive connection profiling pressure head (32), to drive profiling pressure head (32) rotation.

9. The test fixture of claim 8, wherein, The middle part of the profiling pressure head (32) is provided with a mounting hole (324), the output shaft of the motor (6) passes through the mounting hole (324) and is connected with a locking nut (33), the output shaft of the motor (6) is provided with a limiting piece (61), and the circumferential side of the mounting hole (324) is provided with a limiting groove (325) corresponding to the limiting piece (61), so that when the output shaft of the motor (6) passes through the mounting hole (324), the limiting piece (61) is adapted to be inserted into the corresponding limiting groove (325).

10. The test fixture of claim 9, wherein, The output shaft of the motor (6) is in clearance fit with the mounting hole (324) of the profiling pressure head (32), and the profiling pressure head (32) is provided with a vibrator (7).

Images