CN117967646A - Double-station sealing element test equipment - Google Patents
Double-station sealing element test equipment Download PDFInfo
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Abstract
The invention discloses double-station sealing element test equipment, a first tested hydraulic cylinder is arranged at a first test station of a double-station test bench, a second tested hydraulic cylinder is arranged at a second test station, piston rods of a first driving cylinder, a second driving cylinder and a main hydraulic cylinder are connected through a guide balance plate to synchronously act, the first driving cylinder is connected with a rod cavity of the first tested hydraulic cylinder through a first test pipeline, the second driving cylinder is connected with a rodless cavity of the second tested hydraulic cylinder through a second test pipeline, a test control unit is connected with a hydraulic driving unit and the double-station test bench in a control mode, and a test detection unit is connected with the test control unit in a signal mode. The double-station sealing member test equipment provided by the utility model has the advantages that the sealing performance test of two hydraulic cylinders is completed at a time, the test efficiency is improved, the two hydraulic cylinders are tested in the same environment, and the accuracy and the comparability of the sealing test are improved.
Description
Technical Field
The invention relates to a hydraulic test technology, and particularly provides double-station sealing element test equipment.
Background
The hydraulic testing technology is used as a key technology for developing and producing hydraulic elements and hydraulic systems, and is an important means for verifying parameters such as performance indexes, reliability, service life and the like of products. The sealing of the hydraulic cylinder is particularly important to the overall performance of the hydraulic cylinder, making the hydraulic cylinder a significant part of the test.
The sealing of the hydraulic cylinder has two places: one part is a piston rod seal between the piston rod and the end part of the cylinder barrel, and the inner diameter of the piston rod seal is consistent with the inner diameter of the piston rod; the other part is a piston seal between the piston and the inner part of the cylinder barrel, and the outer diameter of the piston seal is consistent with the inner diameter of the cylinder barrel; the piston rod seal and the piston seal are different in structural size and constitution, and therefore, need to be performed separately in a seal test.
Currently, common hydraulic cylinder testing machines are provided with only a single testing station. The durability test of the piston rod seal and the piston seal can only be performed for a single hydraulic cylinder in a single time period. The sealing test period of the hydraulic cylinder is long, the test efficiency is low, and when different hydraulic cylinders are tested in different time periods, the external environment is difficult to be consistent, and the influence of the nuances of the hydraulic transmission process and the external environment on the sealing test is different, so that the test accuracy and the comparability of the sealing test are low.
Disclosure of Invention
Based on the above, the invention provides the double-station sealing element test equipment, so that the sealing performance test of two hydraulic cylinders can be carried out in a single time period, the test efficiency is improved, the two hydraulic cylinders are kept to be tested in the same environment, and the accuracy and the comparability of the sealing test are improved.
In order to achieve the above purpose, the invention provides double-station sealing element test equipment, which comprises a double-station test bench, a hydraulic driving unit, a test detection unit and a test control unit, wherein the double-station test bench is in control connection with the hydraulic driving unit and the double-station test bench, and the sealing monitoring unit is in signal connection with the test control unit.
The double-station test bench comprises a first test station and a second test station, wherein a first tested hydraulic cylinder is arranged at the first test station, and a second tested hydraulic cylinder is arranged at the second test station;
the hydraulic driving unit comprises a hydraulic pump, a main hydraulic cylinder, a first driving cylinder, a second driving cylinder and a guide balance plate, wherein the hydraulic pump is connected with the main hydraulic cylinder through a driving pipeline, piston rods of the first driving cylinder, the second driving cylinder and the main hydraulic cylinder are connected through the guide balance plate to synchronously act, the first driving cylinder is connected with a rod cavity of a first tested hydraulic cylinder through a first testing pipeline, and the second driving cylinder is connected with a rodless cavity of a second tested hydraulic cylinder through a second testing pipeline;
The test detection unit comprises a first hydraulic measuring instrument arranged on the first test pipeline and a second hydraulic measuring instrument arranged on the second test pipeline.
Further, the test control unit is configured to control the main hydraulic cylinder to drive the first driving cylinder and the second driving cylinder to synchronously act so as to drive hydraulic oil of the first driving cylinder to flow into a rod cavity of the first tested hydraulic cylinder to test the tightness of the piston rod, and drive hydraulic oil of the second driving cylinder to flow into a rodless cavity of the second tested hydraulic rod to test the tightness of the piston.
Further, the first measured hydraulic cylinder and the second measured hydraulic cylinder are consistent in structure, the rodless cavity of the first driving cylinder is connected with the rod cavity of the first measured hydraulic cylinder, the rodless cavity of the second driving cylinder is connected with the rodless cavity of the second measured hydraulic cylinder, and the ratio of the area of the cylinder holes of the first driving cylinder to the area of the cylinder holes of the second driving cylinder is equal to the ratio of the sectional areas of the rod cavity and the rodless cavity of the first measured hydraulic cylinder/the second measured hydraulic cylinder.
Further, the double-station test bench comprises a locking mechanism, the locking mechanism is connected with piston rods of the first tested hydraulic cylinder and the second tested hydraulic cylinder in an openable and closable manner, the test control unit is connected with the locking mechanism in a control manner, and the test control unit is configured to control the locking mechanism to lock the piston rods of the first tested hydraulic cylinder and the second tested hydraulic cylinder and control the output pressure of a main hydraulic cylinder of the hydraulic driving unit to be kept within a set value range so as to simultaneously perform a piston rod sealing endurance test of the first tested hydraulic cylinder and a piston rod sealing endurance test of the second tested hydraulic cylinder.
Further, the rodless cavity of the first tested hydraulic cylinder is connected with a first switch valve, the rod cavity of the second tested hydraulic cylinder is connected with a second switch valve, the test control unit is in control connection with the first switch valve and the second switch valve, and the test control unit is configured to control the first switch valve and the second switch valve to be switched into a closed state in a endurance test.
Further, the first and second hydraulic gauges are in signal connection with a test control unit configured to control an output pressure of the master cylinder according to hydraulic measurement values of the first and second hydraulic gauges, and the test control unit controls the pressure of the master cylinder to remain unchanged when at least one of the first and second hydraulic gauges rises to a rated value.
Further, the double-station test bench comprises a loading mechanism, wherein the loading mechanism is connected with the piston rods of the first tested hydraulic cylinder and the second tested hydraulic cylinder in an openable manner, and axial resistance load is applied to the piston rods of the first tested hydraulic cylinder and the second tested hydraulic cylinder simultaneously in an impact test.
Further, the test control unit is configured to control the loading mechanism to be connected with piston rods of the first tested hydraulic cylinder and the second tested hydraulic cylinder, and control the main hydraulic cylinder of the hydraulic driving unit to reciprocate according to a set value so as to simultaneously perform a piston rod sealing impact test of the first tested hydraulic cylinder and a piston sealing impact test of the second tested hydraulic cylinder.
Further, the first hydraulic gauge and the second hydraulic gauge are in signal connection with a test control unit configured to control the reciprocation speed of the master cylinder in accordance with the hydraulic measurement values of the first hydraulic gauge and the second hydraulic gauge, and the test control unit controls the reciprocation speed of the master cylinder to remain unchanged when at least one of the first hydraulic gauge and the second hydraulic gauge rises to a rated value.
Further, the hydraulic pump is connected with the rodless cavity of the main hydraulic cylinder through a first driving pipeline and connected with the rod cavity of the main hydraulic cylinder through a second driving pipeline, reversing valves are arranged on the first driving pipeline and the second driving pipeline, the test control unit is in control connection with the reversing valves, and the test control unit is configured to realize reversing of the main hydraulic cylinder by controlling actions of the reversing valves; the cylinder barrel of the first tested hydraulic cylinder and the cylinder barrel of the second tested hydraulic cylinder are fixed on the test bench, the first driving cylinder is connected with the first tested hydraulic cylinder through a first quick connection oil port, and the second driving cylinder is connected with the second tested hydraulic cylinder through a second quick connection oil port.
Compared with the prior art, the double-station sealing test device provided by the invention has the technical advantages that:
In the testing process, a main hydraulic cylinder is driven by a hydraulic pump, the main hydraulic cylinder drives a first driving cylinder and a second driving cylinder to synchronously reciprocate through a guide balance plate, hydraulic oil for driving the first driving cylinder flows into a rod cavity of a first tested hydraulic cylinder to test the tightness of a piston rod, hydraulic oil for driving the second driving cylinder flows into a rodless cavity of a second tested hydraulic rod to test the tightness of the piston, and the two tested hydraulic cylinders synchronously perform a test, so that the testing efficiency is improved;
In the second aspect, the main hydraulic cylinder is connected with the first driving cylinder and the piston rod of the second driving cylinder through the guide balance plate, the first driving cylinder is connected with the rod cavity of the first tested hydraulic cylinder through the first test pipeline, the second driving cylinder is connected with the rodless cavity of the second tested hydraulic cylinder through the second test pipeline, and the main hydraulic cylinder is mechanically connected with the first driving cylinder and the second driving cylinder through the guide balance plate, so that the accurate synchronous movement of the main hydraulic cylinder and the first driving cylinder and the accurate synchronous movement of the second driving cylinder can be realized, the problem that the testing accuracy is influenced due to poor movement accuracy caused by hydraulic transmission can be avoided, and the accuracy of a sealing test can be effectively improved;
In the third aspect, the first tested hydraulic cylinder and the second tested hydraulic cylinder can be kept to be tested under the same external environment, the situation that the experimental data are influenced due to the fact that the piston rod sealing test and the piston sealing test are large in data difference caused by the external environment difference is avoided, the accuracy of the test is improved, and the comparability of the sealing test is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The disclosure may be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a block diagram of an embodiment of a provided duplex seal testing apparatus;
FIG. 2 is a block diagram of a system configuration of the provided duplex seal testing apparatus;
FIG. 3 is a block diagram of a duplex test stand of the provided test rig;
fig. 4 is a schematic diagram of a hydraulic system of a hydraulic drive unit of the provided test rig.
The attached drawings are used for identifying and describing:
1-a test control unit;
2-double-station test bench, 21-first test station, 22-second test station, 23-locking mechanism, 24-loading mechanism;
3-hydraulic drive unit, 31-hydraulic pump, 32-reversing valve, 33-main hydraulic cylinder, 34-guiding balance plate, 35-first drive cylinder, 36-second drive cylinder, 37-first switch valve, 38-second switch valve;
4-a test detection unit, 41-a first hydraulic gauge, 42-a second hydraulic gauge;
51-first measured hydraulic cylinder, 52-second measured hydraulic cylinder.
It should be understood that the dimensions of the various elements shown in the figures are not drawn to actual scale. Further, the same or similar reference numerals denote the same or similar members.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative, and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.
As shown in fig. 1 to 4, an embodiment of a double-station seal test apparatus provided by the present invention includes a double-station test stand 2, a hydraulic drive unit 3, a test detection unit 4, and a test control unit 1.
The double-station test bench 2 comprises a first test station 21 and a second test station 22, a first tested hydraulic cylinder 51 is mounted on the first test station 21, and a second tested hydraulic cylinder 52 is mounted on the second test station 22.
The hydraulic driving unit 3 comprises a hydraulic pump 31, a main hydraulic cylinder 33, a first driving cylinder 35, a second driving cylinder 36 and a guide balance plate 34, wherein the hydraulic pump 31 is connected with the main hydraulic cylinder 33 through a driving pipeline, piston rods of the first driving cylinder 35, the second driving cylinder 36 and the main hydraulic cylinder 33 are connected through the guide balance plate 34 to synchronously act, the first driving cylinder 35 is connected with a rod cavity of a first tested hydraulic cylinder 51 through a first testing pipeline, and the second driving cylinder 36 is connected with a rodless cavity of a second tested hydraulic cylinder 52 through a second testing pipeline. The test detection unit 4 includes a first hydraulic pressure gauge 41 provided in the first test line and a second hydraulic pressure gauge 42 provided in the second test line. The test control unit 1 is in control connection with the hydraulic drive unit 3 and the double-station test table 2, and the seal monitoring unit is in signal connection with the test control unit 1.
In the testing process, the testing control unit 1 is configured to control the master hydraulic cylinder 33 to drive the first driving cylinder 35 and the second driving cylinder 36 to act synchronously, so as to drive the hydraulic oil of the first driving cylinder 35 to flow into the rod cavity of the first tested hydraulic cylinder 51 to test the tightness of the piston rod, and drive the hydraulic oil of the second driving cylinder 36 to flow into the rod-free cavity of the second tested hydraulic rod to test the tightness of the piston rod.
By using the double-station sealing element test equipment, two tested hydraulic cylinders are tested synchronously in the same time period, so that the test efficiency is improved, the energy consumption in the test process is reduced, and the energy-saving effect is achieved. And moreover, the main hydraulic cylinder is connected with the piston rods of the first driving cylinder and the second driving cylinder through the guide balance plate, belongs to a mechanical and mechanical connection mode, can realize accurate synchronous movement of the main hydraulic cylinder, the first driving cylinder and the second driving cylinder, avoids the problem that the accuracy of the test is affected due to poor movement accuracy caused by hydraulic transmission, and effectively improves the accuracy of a sealing test. Simultaneously, synchronous tests of two tested hydraulic cylinders are carried out under the same external environment in the same time period, the first tested hydraulic cylinder and the second tested hydraulic cylinder are kept to be tested under the same external environment, the situation that the experimental data are influenced due to the fact that the piston rod sealing test and the piston sealing test are large in data difference caused by external environment difference is avoided, the accuracy of the test is improved, and the comparability of the sealing test is improved.
In the implementation process, the structures of the first tested hydraulic cylinder 51 and the second tested hydraulic cylinder 52 are consistent, the rodless cavity of the first driving cylinder 35 is connected with the rod-shaped cavity of the first tested hydraulic cylinder 51, the rodless cavity of the second driving cylinder 36 is connected with the rodless cavity of the second tested hydraulic cylinder 52, the ratio of the area of the cylinder holes of the first driving cylinder 35 to the area of the cylinder holes of the second driving cylinder 36 is equal to the ratio of the cross-sectional areas of the rod-shaped cavity and the rodless cavity of the first tested hydraulic cylinder 51/the second tested hydraulic cylinder 52, so that the sealing test pressure of the piston rod of the first tested hydraulic cylinder is equal to the sealing test pressure of the piston of the second tested hydraulic cylinder, and in the test process, the test pressure can be the rated pressure of the hydraulic cylinder or the product of the rated pressure and the safety coefficient.
In the implementation process, the hydraulic pump 31 is connected with the rodless cavity of the master hydraulic cylinder 33 through a first driving pipeline and is connected with the rod cavity of the master hydraulic cylinder 33 through a second driving pipeline, the first driving pipeline and the second driving pipeline are provided with a reversing valve 32, the test control unit 1 is in control connection with the reversing valve 32, and the test control unit 1 is configured to realize reversing of the master hydraulic cylinder 33 by controlling the action of the reversing valve 32; the cylinders of the first tested hydraulic cylinder 51 and the second tested hydraulic cylinder 52 are fixed on the test bench, the first driving cylinder 35 is connected with the first tested hydraulic cylinder 51 through a first quick connection oil port, and the second driving cylinder 36 is connected with the second tested hydraulic cylinder 52 through a second quick connection oil port. The change of the movement direction of the main hydraulic cylinder is realized through the reversing valve, so that the reciprocating action of the main hydraulic cylinder can be kept to be accurately consistent with a set value, and the accuracy and repeatability of the test are improved.
In some embodiments, the dual-station test stand 2 includes a locking mechanism 23, the locking mechanism 23 is connected with piston rods of the first tested hydraulic cylinder 51 and the second tested hydraulic cylinder 52 in an openable and closable manner, the test control unit 1 is connected with the locking mechanism 23 in a control manner, and the test control unit 1 is configured to control the locking mechanism 23 to lock the piston rods of the first tested hydraulic cylinder 51 and the second tested hydraulic cylinder 52, and control the output pressure of the main hydraulic cylinder 33 of the hydraulic driving unit 3 to be kept within a set value range, so as to perform the piston rod sealing endurance test of the first tested hydraulic cylinder 51 and the piston rod sealing endurance test of the second tested hydraulic cylinder 52 simultaneously. In a specific implementation, the locking mechanism may be a lock catch or a movable latch matched with the piston rod, and when the lock catch or the movable latch is connected with the piston rod, the piston rod is fixed relative to the cylinder body.
On the basis of the above embodiment, the rodless cavity of the first tested hydraulic cylinder 51 is connected with the first switch valve 37, the rod cavity of the second tested hydraulic cylinder 52 is connected with the second switch valve 38, the test control unit 1 is in control connection with the first switch valve 37 and the second switch valve 38, and the test control unit 1 is configured to control the first switch valve 37 and the second switch valve 38 to switch to the closed state in the endurance test. In a specific implementation, the motor drags the hydraulic pump 31, the hydraulic pump passes through the reversing valve 32 to reach the main hydraulic cylinder 33, the main hydraulic cylinder 33 drags the first driving cylinder 35 and the second driving cylinder 36 through the guide balance plate 34, and the other directions of the first tested hydraulic cylinder 51 and the second tested hydraulic cylinder 52 are sealed, so that a high-pressure endurance test can be performed.
Further, the first hydraulic gauge 41 and the second hydraulic gauge 42 are in signal connection with a test control unit 1, the test control unit 1 being configured to control the output pressure of the master cylinder 33 based on the hydraulic measurements of the first hydraulic gauge 41 and the second hydraulic gauge 42, the test control unit 1 controlling the pressure of the master cylinder 33 to remain unchanged when at least one of the first hydraulic gauge 41 and the second hydraulic gauge 42 rises to a nominal value.
In some embodiments, the dual-station test stand 2 includes a loading mechanism 24, where the loading mechanism 24 is connected with piston rods of the first tested hydraulic cylinder 51 and the second tested hydraulic cylinder 52 in an openable and closable manner, and applies an axial resistance load to the piston rods of the first tested hydraulic cylinder 51 and the second tested hydraulic cylinder 52 simultaneously in an impact test. In a specific implementation, the loading mechanism may be a loading hydraulic cylinder for setting an output load, a piston rod of the loading hydraulic cylinder is opposite to and connected with a piston rod of the first measured hydraulic cylinder 51/the second measured hydraulic cylinder 52, or may be a damping cylinder, or a loading block arranged on a slideway with a larger friction coefficient, and the friction force between the loading block and the slideway is used as the loading load.
Further, the test control unit 1 is configured to control the loading mechanism 24 to be connected to the piston rods of the first hydraulic cylinder under test 51 and the second hydraulic cylinder under test 52, and to control the main hydraulic cylinder 33 of the hydraulic drive unit 3 to reciprocate according to a set value so as to perform the piston rod sealing impact test of the first hydraulic cylinder under test 51 and the piston sealing impact test of the second hydraulic cylinder under test 52 simultaneously. In a specific implementation, the motor drags the hydraulic pump 31, the hydraulic pump passes through the reversing valve 32 to reach the main hydraulic cylinder 33, the main hydraulic cylinder 33 drags the first driving cylinder 35 and the second driving cylinder 36 through the guide balance plate 34, and the first tested hydraulic cylinder 51 and the second tested hydraulic cylinder 52 are opened in the other direction for unloading, that is, can perform an impact test, and repeatedly act for a long time to form a life test.
Further, the first hydraulic gauge 41 and the second hydraulic gauge 42 are in signal connection with a test control unit 1, the test control unit 1 being configured to control the reciprocation speed of the master cylinder 33 based on the hydraulic measurements of the first hydraulic gauge 41 and the second hydraulic gauge 42, the test control unit 1 controlling the reciprocation speed of the master cylinder 33 to remain unchanged when at least one of the first hydraulic gauge 41 and the second hydraulic gauge 42 rises to a nominal value. The hydraulic values of the tested hydraulic cylinders are monitored in real time through the first hydraulic measuring instrument 41 and the second hydraulic measuring instrument 42, and the test control unit 1 performs pressure control of the main hydraulic cylinder according to the monitored hydraulic values so as to perform tests with different sealing grades according to the process, so that the multi-level and gradual improvement of the tests is achieved.
Specific embodiments of the present invention will be described below with reference to the accompanying drawings, in order to more clearly and in detail explain the technical principles of the invention.
As shown in fig. 1 and 2, the invention provides a testing device for simultaneously testing the sealing of a piston rod and a piston, wherein a hydraulic pump 31 is connected with an electromagnetic directional valve 32, two oil ways are respectively arranged between the electromagnetic directional valve 32 and a main hydraulic cylinder 33, namely a first driving oil way and a second driving oil way, a first driving cylinder 35 and a second driving cylinder 36 are connected with the main hydraulic cylinder 33 into a whole through a guide balance plate 34, the movement speed is consistent, a second tested hydraulic cylinder 52 for testing the sealing of the piston is connected with a second driving cylinder 36 through an oil way interface, and a first tested hydraulic cylinder 51 for testing the sealing of the piston rod is connected with a first driving cylinder 35 through an oil way interface. The two sides of the electromagnetic directional valve 32 are powered off, and the supplied hydraulic oil enters the main hydraulic cylinder 33 to push the first driving cylinder 35 and the second driving cylinder 36 to move back and forth. The hydraulic oil from the hydraulic pump 31 reaches the split port, and simultaneously opens through the electromagnetic directional valve 32, and the hydraulic oil simultaneously reaches the master cylinder 33, the first drive cylinder 35, and the second drive cylinder 36. The main hydraulic cylinder 33 drives the first driving cylinder 35 and the second driving cylinder 36 to move back and forth, and the tested piston rod seal and the tested piston seal are tested.
In the seal test, a double-station is adopted to test two groups of seal tests of the piston rod seal and the piston seal simultaneously. The first tested hydraulic cylinder 51 of the piston rod sealing test is connected with the first driving cylinder 35 interface through the oil way interface, the second tested hydraulic cylinder 52 of the piston sealing test is connected with the second driving cylinder 36 interface through the oil way interface, the first driving cylinder 35 and the second driving cylinder 36 are driven by the main hydraulic cylinder 33 to simultaneously move to test the tested piston rod and the tested piston, the testing speed is accelerated, and the efficient testing function is achieved.
In particular, the dual-station test bench 2 is placed on the ground, and the master hydraulic cylinder 33, the first driving cylinder 35 and the second driving cylinder 36 are fixed on the dual-station test bench 2. The oil tank is fixed on duplex position testboard 2 through the support, and the motor is also fixed on duplex position testboard 2, and the operation panel level of installation test control unit 1 is placed subaerial, and the hydraulic pressure station is equipped with many hydraulic lines, and the guide rail balancing pole links together master cylinder and first actuating cylinder, second actuating cylinder, and the functioning speed is the same, has the level gauge on the oil tank, can observe the oil mass of oil tank. The electric cabinet provides power to drive the electric device.
In specific implementation, the pneumatic cylinder is fixed on the testboard, and the testboard level is placed on the horizontal plane, links together with the direction balance board between master cylinder and first actuating cylinder, the second actuating cylinder, and the piston rod of being tested, the piston one end of being tested are fixed on the duplex position testboard, and there is horizontal guide rail first actuating cylinder, second actuating cylinder below, has frictional force between guide rail and first actuating cylinder, the second actuating cylinder, and first actuating cylinder, second actuating cylinder and master cylinder outside respectively have two hydraulic interface, are used for connecting the hydraulic line, have the frock sealed on first actuating cylinder, second actuating cylinder and the master cylinder terminal surface.
The control console is internally provided with an industrial control computer, so that automatic control can be performed, data of automatic equipment can be transmitted, and the automatic control equipment can be controlled.
The specific implementation process comprises the following steps: the motor is controlled to rotate by the test control unit 1 of the control console, the motor drives the hydraulic pump 31 to move, the electromagnetic directional valve 32 is opened, hydraulic oil enters a pipeline of the test console, the main hydraulic cylinder 33 is pushed to move, the first driving cylinder 35 and the second driving cylinder 36 are driven to move back and forth at the same time, and the first tested hydraulic cylinder 51 and the second tested hydraulic cylinder 52 for piston rod sealing test and piston sealing test are tested. The specific testing steps are that a motor controlled by a frequency converter drags a hydraulic pump 31, the hydraulic pump passes through a reversing valve 32 to reach a tested state, the reversing valve 32 controls a main hydraulic cylinder 33 to rotate in the circumferential direction, the other direction of a first tested hydraulic cylinder 51 and a second tested hydraulic cylinder 52 is sealed, a high-pressure endurance test can be performed, if the hydraulic pump is opened, unloading is performed, namely, an impact test can be performed, and a life test is formed by repeating long-time actions.
Compared with the prior art, the double-station sealing piece test equipment provided by the invention adopts double-station sealing and piston sealing, and greatly improves the test efficiency of the endurance test, the impact test and the life test. The tightness of the piston rod and the piston can be tested simultaneously, and the testing efficiency is improved.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that the foregoing embodiments may be modified and equivalents substituted for elements thereof without departing from the scope and spirit of the disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (10)
1. A duplex seal testing apparatus, comprising:
The double-station test bench (2) comprises a first test station (21) and a second test station (22), wherein a first tested hydraulic cylinder (51) is arranged at the first test station (21), and a second tested hydraulic cylinder (52) is arranged at the second test station (22);
The hydraulic driving unit (3) comprises a hydraulic pump (31), a main hydraulic cylinder (33), a first driving cylinder (35), a second driving cylinder (36) and a guide balance plate (34), wherein the hydraulic pump (31) is connected with the main hydraulic cylinder (33) through a driving pipeline, piston rods of the first driving cylinder (35), the second driving cylinder (36) and the main hydraulic cylinder (33) are connected through the guide balance plate (34) to synchronously act, the first driving cylinder (35) is connected with a rod cavity of a first tested hydraulic cylinder (51) through a first testing pipeline, and the second driving cylinder (36) is connected with a rodless cavity of a second tested hydraulic cylinder (52) through a second testing pipeline;
a test detection unit (4) including a first hydraulic pressure measurement instrument (41) provided in a first test line and a second hydraulic pressure measurement instrument (42) provided in a second test line;
The test control unit (1) is in control connection with the hydraulic driving unit (3) and the double-station test table (2), and the seal monitoring unit is in signal connection with the test control unit (1).
2. The double-station seal test equipment according to claim 1, wherein the test control unit (1) is configured to control the master hydraulic cylinder (33) to drive the first driving cylinder (35) and the second driving cylinder (36) to synchronously act so as to drive hydraulic oil of the first driving cylinder (35) to flow into a rod cavity of the first tested hydraulic cylinder (51) to test the tightness of a piston rod, and drive hydraulic oil of the second driving cylinder (36) to flow into a rodless cavity of the second tested hydraulic rod to test the tightness of the piston.
3. The double-station seal test equipment according to claim 2, wherein the first tested hydraulic cylinder (51) and the second tested hydraulic cylinder (52) are identical in structure, a rodless cavity of the first driving cylinder (35) is connected with a rod cavity of the first tested hydraulic cylinder (51), a rodless cavity of the second driving cylinder (36) is connected with a rodless cavity of the second tested hydraulic cylinder (52), and a cylinder hole area ratio of the first driving cylinder (35) to the second driving cylinder (36) is equal to a cross-sectional area ratio of the rod cavity to the rodless cavity of the first tested hydraulic cylinder (51)/the second tested hydraulic cylinder (52).
4. A duplex seal testing apparatus according to claim 3, wherein the duplex test stand (2) comprises a locking mechanism (23), the locking mechanism (23) is connected with piston rods of the first tested hydraulic cylinder (51) and the second tested hydraulic cylinder (52) in an openable and closable manner, the test control unit (1) is connected with the locking mechanism (23) in a control manner, and the test control unit (1) is configured to control the locking mechanism (23) to lock the piston rods of the first tested hydraulic cylinder (51) and the second tested hydraulic cylinder (52) and to control the output pressure of the main hydraulic cylinder (33) of the hydraulic driving unit (3) to be kept within a set value range so as to simultaneously perform the piston rod seal durability test of the first tested hydraulic cylinder (51) and the piston rod seal durability test of the second tested hydraulic cylinder (52).
5. The double-station seal test equipment according to claim 4, characterized in that the rodless cavity of the first hydraulic cylinder (51) under test is connected with a first switching valve (37), the rod-containing cavity of the second hydraulic cylinder (52) under test is connected with a second switching valve (38), the test control unit (1) is in control connection with the first switching valve (37) and the second switching valve (38), and the test control unit (1) is configured to control the first switching valve (37) and the second switching valve (38) to switch into a closed state in a endurance test.
6. The double-station seal test equipment according to claim 5, characterized in that the first hydraulic gauge (41) and the second hydraulic gauge (42) are in signal connection with a test control unit (1), the test control unit (1) being configured to control the output pressure of the master cylinder (33) in dependence on the hydraulic measurements of the first hydraulic gauge (41) and the second hydraulic gauge (42), the test control unit (1) controlling the pressure of the master cylinder (33) to remain unchanged when at least one of the first hydraulic gauge (41) and the second hydraulic gauge (42) rises to a nominal value.
7. A double-station seal testing apparatus according to claim 3, characterized in that the double-station testing stand (2) comprises a loading mechanism (24), the loading mechanism (24) being connected to the piston rods of the first and second tested hydraulic cylinders (51, 52) in an openable and closable manner, and in an impact test applying an axial resistance load to the piston rods of the first and second tested hydraulic cylinders (51, 52) simultaneously.
8. The double-station seal test equipment according to claim 7, wherein the test control unit (1) is configured to control the loading mechanism (24) to be connected with piston rods of the first cylinder under test (51) and the second cylinder under test (52), and to control the main cylinder (33) of the hydraulic drive unit (3) to reciprocate at a set value to perform the piston rod seal impact test of the first cylinder under test (51) and the piston seal impact test of the second cylinder under test (52) simultaneously.
9. The double-station seal test equipment according to claim 8, characterized in that the first hydraulic gauge (41) and the second hydraulic gauge (42) are in signal connection with a test control unit (1), the test control unit (1) being configured to control the reciprocation speed of the master cylinder (33) in dependence on the hydraulic measurements of the first hydraulic gauge (41) and the second hydraulic gauge (42), the test control unit (1) controlling the reciprocation speed of the master cylinder (33) to remain unchanged when at least one of the first hydraulic gauge (41) and the second hydraulic gauge (42) rises to a nominal value.
10. A double-station seal test rig according to claim 1 or 2 or 3, characterized in that the hydraulic pump (31) is connected to the rodless chamber of the master cylinder (33) via a first drive line, to the rod-like chamber of the master cylinder (33) via a second drive line, the first and second drive lines being provided with a reversing valve (32), the test control unit (1) being in control connection with the reversing valve (32), the test control unit (1) being configured to effect reversing of the master cylinder (33) by controlling the action of the reversing valve (32); the cylinder barrels of the first tested hydraulic cylinder (51) and the second tested hydraulic cylinder (52) are fixed on the test bench, the first driving cylinder (35) is connected with the first tested hydraulic cylinder (51) through a first quick connection oil port, and the second driving cylinder (36) is connected with the second tested hydraulic cylinder (52) through a second quick connection oil port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410224616.0A CN117967646A (en) | 2024-02-29 | 2024-02-29 | Double-station sealing element test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410224616.0A CN117967646A (en) | 2024-02-29 | 2024-02-29 | Double-station sealing element test equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117967646A true CN117967646A (en) | 2024-05-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410224616.0A Pending CN117967646A (en) | 2024-02-29 | 2024-02-29 | Double-station sealing element test equipment |
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| Country | Link |
|---|---|
| CN (1) | CN117967646A (en) |
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2024
- 2024-02-29 CN CN202410224616.0A patent/CN117967646A/en active Pending
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