CN110160718B - Anti yawing force capability test device of pneumatic cylinder - Google Patents

Anti yawing force capability test device of pneumatic cylinder Download PDF

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CN110160718B
CN110160718B CN201910422840.XA CN201910422840A CN110160718B CN 110160718 B CN110160718 B CN 110160718B CN 201910422840 A CN201910422840 A CN 201910422840A CN 110160718 B CN110160718 B CN 110160718B
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loading
hydraulic cylinder
tested
oil
rotating wheel
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CN110160718A (en
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郝岩研
窦雪川
杨志鹏
周兴广
李红
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Beijing Institute of Structure and Environment Engineering
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Beijing Institute of Structure and Environment Engineering
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts
    • G01M13/02Gearings; Transmission mechanisms
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0041Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
    • G01M5/005Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems

Abstract

The invention provides a lateral force performance testing device of a hydraulic cylinder, wherein an installation base of the device is horizontally placed and fixed, and an installation support is fixed on one side of the installation base and used for supporting and fixing the hydraulic cylinder to be tested; a loading actuator is fixed on the other side of the mounting base, the tail end of a piston rod of the loading actuator is connected with a load sensor, and one end of the load sensor, which is far away from the piston rod of the loading actuator, is connected with the rotating wheel bracket; the loading rotating wheel is erected and fixed on the rotating wheel bracket through a rotating shaft of the loading rotating wheel, and the loading rotating wheel abuts against a piston rod of the hydraulic cylinder to be tested. The lateral force loading device loads the lateral force on the hydraulic cylinder, releases the axial degree of freedom of the piston rod of the tested hydraulic cylinder in a rotating wheel mode, and realizes the test of the bearing performance of the lateral force at any position of the full stroke of the hydraulic cylinder.

Description

Anti yawing force capability test device of pneumatic cylinder
Technical Field
The invention relates to a lateral force performance testing device for a hydraulic cylinder, and belongs to the field of hydraulic cylinder testing.
Background
The hydraulic cylinder is an actuating element in a hydraulic transmission system, can convert hydraulic energy into mechanical energy, and is commonly used for working conditions of dynamic loading or static loading and the like in the industrial field or the experimental field. In the use working condition of the hydraulic cylinder, the hydraulic cylinder is required to bear larger lateral force or overturning moment in part of the use working condition, so that the hydraulic cylinder is required to have stronger lateral force resistance.
At present, the lateral force resistance of the existing hydraulic cylinder is estimated only by theoretical calculation, actual measurement is not carried out, a mature lateral force resistance measuring device is not available in the market, and certain danger is caused in the use occasion with higher requirements on the lateral force. If the theoretical calculation value is wrong, the estimated value is larger than the actually bearable lateral force, and the loading is carried out according to the estimated value when the theoretical calculation value is used, the situation that the borne lateral force is higher than the actually bearable lateral force can occur, the loading failure and the damage to the hydraulic cylinder can be caused, and the dangerous accident of operators can be caused more seriously.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects and requirements in the prior art, the invention provides a lateral force performance testing device for a hydraulic cylinder, which is used for loading a lateral force on the hydraulic cylinder, releasing the axial degree of freedom of a piston rod of the tested hydraulic cylinder in a rotating wheel mode and realizing the lateral force bearing performance test of the hydraulic cylinder at any position of the full stroke.
(II) technical scheme
A device for testing the lateral force resistance of a hydraulic cylinder comprises a mounting base, a mounting bracket, a loading rotating wheel, a rotating wheel bracket, a load sensor, a loading actuator, a servo valve, a control system and an oil source; the mounting base is horizontally placed and fixed, and the mounting bracket is fixed on one side of the mounting base and used for supporting and fixing the hydraulic cylinder to be tested; a loading actuator is fixed on the other side of the mounting base, the tail end of a piston rod of the loading actuator is connected with a load sensor, and one end of the load sensor, which is far away from the piston rod of the loading actuator, is connected with the rotating wheel bracket; the loading rotating wheel is erected and fixed on the rotating wheel bracket through a rotating shaft of the loading rotating wheel, and the loading rotating wheel abuts against a piston rod of the hydraulic cylinder to be tested.
The servo valve is arranged on the side wall of the loading actuator, which deviates from one side of the hydraulic cylinder to be tested.
And a first oil port of the servo valve is communicated with a lower cavity of the loading actuator, and a second oil port of the servo valve is communicated with an upper cavity of the loading actuator.
The servo valve is connected with an oil source through a pipeline.
The high-pressure oil outlet of the oil source is connected with the oil inlet of the servo valve, and the oil return port of the oil source is connected with the oil return port of the servo valve.
And the control system is respectively connected with a servo valve and a load sensor on the loading actuator through cables.
The outer wall of the loading rotating wheel is attached with a layer of flexible material.
The use method of the lateral force resistance performance testing device for the hydraulic cylinder comprises the following steps:
step 1, fixing a hydraulic cylinder to be tested on a mounting base through a mounting bracket, and adjusting a piston rod of the hydraulic cylinder to be tested to a testing position;
step 2, adjusting the mounting position of the loading actuator on the mounting base to enable the loading rotating wheel to be tightly abutted against a piston rod of the hydraulic cylinder to be tested, wherein the abutted position is the position to be tested;
step 3, connecting the servo valve with an oil source and a control system respectively in place, and connecting a displacement sensor and a load sensor of the loading actuator with the control system respectively in place;
step 4, starting an oil source, enabling oil to enter the loading actuator through an oil inlet of the servo valve, driving a piston rod of the loading actuator to move, and applying a lateral force to the tested hydraulic cylinder;
step 5, the load sensor feeds back the loaded lateral force signal to the control system, the lateral force signal is compared with a command signal of the control system, the control system adjusts the size of the command signal output to the servo valve according to a comparison result, and the size of a valve core opening of the servo valve is controlled to control the pressure difference between two oil cavities of the loading actuator and the displacement of a piston rod;
step 6, when the loading value of the loading actuator reaches a preset value, driving a piston rod of the hydraulic cylinder to be tested to slowly move in a stroke range, and checking and judging whether the hydraulic cylinder to be tested has the condition of overlarge loading lateral force or not;
and 7, after the position test is completed, disconnecting the oil source, driving the piston rod of the hydraulic cylinder to be tested to be replaced to the next position for testing, and repeating the steps 4-6 until the test on the lateral force resistance of the whole hydraulic cylinder to be tested is completed.
The oil is high-pressure oil.
(III) advantageous effects
According to the lateral force performance testing device for the hydraulic cylinder, the conventional components are utilized, the lateral force bearing performance testing of the hydraulic cylinder at any position of the full stroke is realized, the application precision of the lateral force is high, the processing is simple, the design cost is low, the operation is simple, and the application range is large; in the whole test process, the closed loop is controlled to be formed, and the test reliability is high. The invention can also be widely applied to the lateral force test or load measurement of other parts or structures.
Drawings
Fig. 1 is a schematic structural diagram of a device for testing lateral force resistance of a hydraulic cylinder according to the present invention.
FIG. 2 is a control schematic diagram of a device for testing the lateral force resistance of a hydraulic cylinder according to the present invention.
In the figure, 1-mounting base, 2-mounting bracket, 3-loading runner, 4-runner bracket, 5-load sensor, 6-loading actuator, 7-servo valve, 8-control system and 9-oil source.
Detailed Description
Referring to fig. 1, the device for testing the lateral force resistance of the hydraulic cylinder comprises a mounting base 1, a mounting bracket 2, a loading rotating wheel 3, a rotating wheel bracket 4, a load sensor 5, a loading actuator 6, a servo valve 7, a control system 8 and an oil source 9; the mounting base 1 is horizontally placed and fixed, and the mounting bracket 2 is fixed on one side of the mounting base 1 and used for supporting and fixing the hydraulic cylinder to be tested; a loading actuator 6 is fixed on the other side of the mounting base 1, the tail end of a piston rod of the loading actuator 6 is connected with a load sensor 5, and one end, away from the piston rod of the loading actuator 6, of the load sensor 5 is connected with the rotating wheel support 4; the loading runner 3 is erected and fixed on the runner bracket 4 through a rotating shaft thereof, and the loading runner 3 abuts against a piston rod of the hydraulic cylinder to be tested.
The servo valve 7 is installed on the side wall of the loading actuator 6, which is far away from one side of the hydraulic cylinder to be tested, a first oil port of the servo valve 7 is communicated with a lower cavity of the loading actuator 6, and a second oil port of the servo valve 7 is communicated with an upper cavity of the loading actuator 6.
The servo valve 7 is connected with an oil source 9 through a pipeline, a high-pressure oil outlet of the oil source 9 is connected with an oil inlet of the servo valve 7, and an oil return port of the oil source 9 is connected with an oil return port of the servo valve 7.
The control system 8 is connected by cables to the servo valve 7 and the load cell 5 on the loading actuator 6, respectively.
The outer wall of the loading wheel 3 is attached with a layer of flexible material. When the loading rotating wheel 3 is in contact with the piston rod of the tested hydraulic cylinder, the surface of the piston rod is not damaged, and meanwhile, the lateral force applied by the loading actuator 6 is more uniformly distributed on the piston rod of the tested hydraulic cylinder.
The control system 8 includes a human-computer interaction system and a display system.
Referring to fig. 1-2, the use method of the device for testing the lateral force resistance of the hydraulic cylinder of the invention comprises the following steps:
step 1, fixing a hydraulic cylinder to be tested on a mounting base 1 through a mounting bracket 2, and adjusting a piston rod of the hydraulic cylinder to be tested to a testing position;
step 2, adjusting the mounting position of the loading actuator 6 on the mounting base 1 to enable the loading rotating wheel 3 to be tightly abutted against a piston rod of the hydraulic cylinder to be tested, wherein the abutted position is the position to be tested;
step 3, connecting the servo valve 7 with an oil source 9 and a control system 8 in place respectively, and connecting a displacement sensor and a load sensor 5 of a loading actuator 6 with the control system 8 in place respectively;
step 4, starting an oil source 9, enabling high-pressure oil to enter the loading actuator 6 through an oil inlet of the servo valve 7, driving a piston rod of the loading actuator 6 to move, and applying lateral force to the tested hydraulic cylinder;
step 5, the load sensor 5 feeds back the loaded lateral force signal to the control system 8, the lateral force signal is compared with a command signal of the control system 8, the control system 8 adjusts the size of the command signal output to the servo valve 7 according to a comparison result, and the size of a valve core opening of the servo valve 7 is controlled so as to control the pressure difference between two oil cavities of the loading actuator 6 and the displacement of a piston rod;
step 6, when the loading value of the loading actuator 6 reaches a preset value, driving a piston rod of the hydraulic cylinder to be tested to slowly move in a stroke range, and checking and judging whether the hydraulic cylinder to be tested has the condition of overlarge loading lateral force or not;
and 7, after the position test is completed, disconnecting the oil source 9, driving the piston rod of the hydraulic cylinder to be tested to be replaced to the next position for testing, and repeating the steps 4-6 until the test on the lateral force resistance of the whole hydraulic cylinder to be tested is completed.

Claims (1)

1. The use method of the lateral force resistance performance testing device of the hydraulic cylinder is characterized in that the lateral force resistance performance testing device of the hydraulic cylinder comprises a mounting base, a mounting bracket, a loading rotating wheel, a rotating wheel bracket, a load sensor, a loading actuator, a servo valve, a control system and an oil source; the mounting base is horizontally placed and fixed, and the mounting bracket is fixed on one side of the mounting base and used for supporting and fixing the hydraulic cylinder to be tested; a loading actuator is fixed on the other side of the mounting base, the tail end of a piston rod of the loading actuator is connected with a load sensor, and one end of the load sensor, which is far away from the piston rod of the loading actuator, is connected with the rotating wheel bracket; the loading rotating wheel is erected and fixed on the rotating wheel bracket through a rotating shaft of the loading rotating wheel, and the loading rotating wheel abuts against a piston rod of the hydraulic cylinder to be tested;
the servo valve is arranged on the side wall of the loading actuator, which is far away from one side of the hydraulic cylinder to be tested; a first oil port of the servo valve is communicated with a lower cavity of the loading actuator, and a second oil port of the servo valve is communicated with an upper cavity of the loading actuator; the servo valve is connected with an oil source through a pipeline; a high-pressure oil outlet of the oil source is connected with an oil inlet of the servo valve, and an oil return port of the oil source is connected with an oil return port of the servo valve; the control system is respectively connected with a servo valve and a load sensor on the loading actuator through cables; a layer of flexible material is attached to the outer wall of the loading rotating wheel; the control system comprises a human-computer interaction system and a display system; the using method comprises the following steps:
step 1, fixing a hydraulic cylinder to be tested on a mounting base through a mounting bracket, and adjusting a piston rod of the hydraulic cylinder to be tested to a testing position;
step 2, adjusting the mounting position of the loading actuator on the mounting base to enable the loading rotating wheel to be tightly abutted against a piston rod of the hydraulic cylinder to be tested, wherein the abutted position is the position to be tested;
step 3, connecting the servo valve with an oil source and a control system in place respectively, and connecting the displacement sensor of the loading actuator and the load sensor with the control system in place respectively;
step 4, starting an oil source, enabling oil to enter the loading actuator through an oil inlet of the servo valve, driving a piston rod of the loading actuator to move, and applying a lateral force to the tested hydraulic cylinder;
step 5, the load sensor feeds back the loaded lateral force signal to the control system, the lateral force signal is compared with a command signal of the control system, the control system adjusts the size of the command signal output to the servo valve according to a comparison result, and the size of a valve core opening of the servo valve is controlled to control the pressure difference between two oil cavities of the loading actuator and the displacement of a piston rod;
step 6, when the loading value of the loading actuator reaches a preset value, driving a piston rod of the hydraulic cylinder to be tested to slowly move in a stroke range, and checking and judging whether the hydraulic cylinder to be tested has the condition of overlarge loading lateral force or not;
7, after the position test is completed, disconnecting the oil source, driving the piston rod of the hydraulic cylinder to be tested to be replaced to the next position for testing, and repeating the steps 4-6 until the test on the lateral force resistance of the whole hydraulic cylinder to be tested is completed;
the oil is high-pressure oil.
CN201910422840.XA 2019-05-21 2019-05-21 Anti yawing force capability test device of pneumatic cylinder Active CN110160718B (en)

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Citations (14)

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CN201502587U (en) * 2009-09-04 2010-06-09 中国第一汽车集团公司 Hydraulic cylinder high and low temperature testing device
CN102778345A (en) * 2012-02-10 2012-11-14 青海华鼎实业股份有限公司 Test device for simulating loading of main shaft of working condition
CN202693287U (en) * 2012-06-26 2013-01-23 中国航空工业第六一八研究所 Test complex for parallel coupled actuator
CN102798527A (en) * 2012-07-27 2012-11-28 河南科技大学 Tester for detecting performance of oil-retaining bearing and radial loading mechanism thereof
CN103616180A (en) * 2013-10-21 2014-03-05 浙江大学 Bearing radial dynamic loading fault simulation diagnosis test bed
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