CN111692162A - Rapid and accurate test system and test method for internal leakage amount of hydraulic cylinder - Google Patents
Rapid and accurate test system and test method for internal leakage amount of hydraulic cylinder Download PDFInfo
- Publication number
- CN111692162A CN111692162A CN202010560033.7A CN202010560033A CN111692162A CN 111692162 A CN111692162 A CN 111692162A CN 202010560033 A CN202010560033 A CN 202010560033A CN 111692162 A CN111692162 A CN 111692162A
- Authority
- CN
- China
- Prior art keywords
- valve
- oil
- hydraulic control
- way valve
- way
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 101
- 238000010998 test method Methods 0.000 title claims abstract description 10
- 230000010349 pulsation Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 234
- 239000010720 hydraulic oil Substances 0.000 description 8
- 239000000047 product Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
Landscapes
- Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a quick and accurate test system and a test method for internal leakage of a hydraulic cylinder, and belongs to hydraulic cylinder detection equipment. The device comprises a low-pressure operation control module, a high-pressure loading control module, an internal leakage testing module I, an internal leakage testing module II and a tested cylinder; the low-pressure operation control module is connected with a rod cavity and a rodless cavity of the tested cylinder and provides low-pressure large-flow power oil for the tested cylinder; the high-pressure loading control module is respectively connected with an inner leakage testing module I and an inner leakage testing module II, the inner leakage testing module I is connected with a rod cavity of the tested cylinder, the inner leakage testing module II is connected with a rodless cavity of the tested cylinder, and the high-pressure loading control module provides high-pressure low-flow power oil for the tested cylinder. The hydraulic principle is novel, the functions are complete, and the rapid and accurate measurement of the leakage in the hydraulic cylinder can be realized; the universality is stronger, and the reference significance is provided for other similar product designs.
Description
Technical Field
The invention relates to hydraulic cylinder detection equipment, in particular to a quick and accurate test system and a test method for internal leakage of a hydraulic cylinder.
Background
When the current hydraulic cylinder industry carries out internal leakage test, the internal leakage test is generally carried out according to national standard GB/T15622-2005 hydraulic cylinder test method and industry standard JB/T10205-2010 hydraulic cylinder, and the test method comprises the following steps: inputting oil liquid into the working cavity of the tested hydraulic cylinder, pressurizing to nominal pressure, and measuring the leakage quantity of the oil liquid leaked to the unpressurized cavity through the piston. The test method requires: firstly, installing a flowmeter or a measuring cup at an oil outlet of an unpressurized cavity of a tested cylinder for measurement; and secondly, an oil port of the unpressurized cavity of the tested cylinder faces downwards, and the internally leaked hydraulic oil can flow out of the oil port of the unpressurized cavity to a flowmeter or a measuring cup at the fastest time to perform testing. If the non-pressurized cavity oil port of the tested cylinder is not downward, and the hydraulic oil leaked inwards is required to fill the non-pressurized cavity volume or partial volume (determined according to the angle of the non-pressurized cavity oil outlet of the tested cylinder) of the tested cylinder, wherein the volume is raised to the hundreds liter level (determined according to the parameters of the tested cylinder).
It can be seen that the national standard and the line standard test methods have the following problems in practical application:
because the leakage range in the commonly used oil cylinder (the cylinder diameter is 40mm in the middle and 500mm in the middle and the middle) is 0.03 ml/min-4.2 ml/min, the leakage amount in the milliliter level needs to firstly flow through the unpressurized cavity of the tested cylinder, then part or all of the volume of the unpressurized cavity of the tested cylinder is filled (according to the angle of the oil outlet of the unpressurized cavity of the tested cylinder), and then the leakage amount can flow to a flowmeter or a measuring cup through the oil port of the unpressurized cavity of the tested cylinder for detection, so that the efficiency is extremely low. According to experience, the accurate test of one oil cylinder requires 0.5 to 3 hours (according to the sealing structure and specification parameters of the tested cylinder), and the requirement of quick quality detection of batch products is severely restricted.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a system and a method for quickly and accurately testing the leakage rate in a hydraulic cylinder.
The invention is realized by the following technical scheme:
a quick and accurate test system for the internal leakage amount of a hydraulic cylinder comprises a low-pressure operation control module, a high-pressure loading control module, an internal leakage test module I, an internal leakage test module II and a tested cylinder; the low-pressure operation control module is connected with a rod cavity and a rodless cavity of the tested cylinder and provides low-pressure large-flow power oil for the tested cylinder; the high-pressure loading control module is respectively connected with an inner leakage testing module I and an inner leakage testing module II, the inner leakage testing module I is connected with a rod cavity of the tested cylinder, the inner leakage testing module II is connected with a rodless cavity of the tested cylinder, and the high-pressure loading control module provides high-pressure low-flow power oil for the tested cylinder.
It further comprises the following steps: the low-pressure operation control module comprises a low-pressure large-flow pump driven by a motor II, and an oil outlet of the low-pressure large-flow pump is connected with a pressure gauge II and an electro-hydraulic reversing valve; the electro-hydraulic reversing valve is connected with a rod cavity and a rodless cavity of the tested cylinder.
The low-pressure operation control module further comprises an oil level and temperature meter, an air filter, an oil return oil filter II, a one-way valve, an electromagnetic overflow valve, a three-position four-way electromagnetic reversing valve III, a hydraulic control one-way valve VIIII and a hydraulic control one-way valve VIIIII;
an oil inlet of the one-way valve is communicated with an oil outlet of the low-pressure high-flow pump;
an oil inlet of the electromagnetic overflow valve is communicated with an oil outlet of the one-way valve, and an oil outlet of the electromagnetic overflow valve is communicated with an oil inlet of the return oil filter II;
an oil inlet of the electro-hydraulic reversing valve is communicated with an oil outlet of the one-way valve, an oil return port of the electro-hydraulic reversing valve is communicated with an oil inlet of an oil return oil filter II, an oil outlet A of the electro-hydraulic reversing valve is communicated with an oil inlet of a hydraulic control one-way valve VIIII, and an oil outlet B of the electro-hydraulic reversing valve is communicated with an oil inlet of a hydraulic control one-way valve VIIIII;
an oil inlet of the three-position four-way electromagnetic reversing valve III is communicated with an oil outlet of the one-way valve, an oil return port of the three-position four-way electromagnetic reversing valve III is communicated with an oil tank, an oil outlet A of the three-position four-way electromagnetic reversing valve III is communicated with a pilot control port of the hydraulic control one-way valve, and an oil outlet B of the three-position four-way electromagnetic reversing valve III is communicated with a pilot control port of the hydraulic control one-way valve VIIIII;
the oil outlet of the hydraulic control one-way valve VIIII is communicated with the rodless cavity oil port of the tested cylinder and the oil outlet of the internal leakage testing module II;
and the oil outlet of the hydraulic control one-way valve VIIIII is communicated with the oil port of the rod cavity of the tested cylinder and the oil outlet of the internal leakage testing module I.
The high-pressure loading control module comprises a high-pressure small-flow pump driven by a motor I, and an oil outlet of the high-pressure small-flow pump is connected with a pressure gauge I, an energy accumulator, a two-position two-way electromagnetic ball valve, a three-position four-way electromagnetic reversing valve I and a three-position four-way electromagnetic reversing valve II; the two-position two-way electromagnetic ball valve is connected to the oil tank; the three-position four-way electromagnetic directional valve I and the three-position four-way electromagnetic directional valve II are correspondingly connected with the internal leakage testing module II and the internal leakage testing module I.
The internal leakage testing module II comprises a hydraulic control one-way valve V, a hydraulic control one-way valve VI, a hydraulic control one-way valve VII and a hydraulic control one-way valve VIII;
the oil outlet of the hydraulic control one-way valve V is communicated with the oil outlet of the high-pressure small-flow pump, the oil inlet of the hydraulic control one-way valve V is communicated with the oil inlet of the hydraulic control one-way valve VI, and the pilot control port of the hydraulic control one-way valve V is communicated with the pilot control port of the hydraulic control one-way valve VI and the oil outlet B of the three-position four-way electromagnetic reversing valve I;
an oil outlet of the hydraulic control one-way valve VI is communicated with a rodless cavity of the tested cylinder;
an oil inlet of the hydraulic control one-way valve VII is communicated with an oil inlet of the flowmeter II, an oil outlet of the hydraulic control one-way valve VII is communicated with an oil outlet of the high-pressure small-flow pump, and a pilot control port of the hydraulic control one-way valve VII and a pilot control port of the hydraulic control one-way valve VIII are communicated with an oil outlet A of the three-position four-way electromagnetic reversing valve I;
an oil inlet of the hydraulic control one-way valve VIII is communicated with an oil outlet of the flowmeter II, and an oil outlet of the hydraulic control one-way valve VIII is communicated with a rodless cavity of the tested cylinder.
The internal leakage testing module I comprises a hydraulic control one-way valve I, a hydraulic control one-way valve II, a hydraulic control one-way valve III and a hydraulic control one-way valve IV;
the oil outlet of the hydraulic control one-way valve I is communicated with the oil outlet of the high-pressure small-flow pump, the oil inlet of the hydraulic control one-way valve I is communicated with the oil inlet of the hydraulic control one-way valve II, and the pilot control port of the hydraulic control one-way valve I and the pilot control port of the hydraulic control one-way valve II are communicated with the oil outlet B of the three-position four-way electromagnetic reversing valve II;
the oil outlet of the hydraulic control one-way valve II is communicated with a rod cavity of the tested cylinder;
an oil inlet of the hydraulic control one-way valve III is communicated with an oil inlet of the flowmeter I, an oil outlet of the hydraulic control one-way valve III is communicated with an oil outlet of the high-pressure small-flow pump, and a pilot control port of the hydraulic control one-way valve III and a pilot control port of the hydraulic control one-way valve IV are communicated with an oil outlet A of the three-position four-way electromagnetic reversing valve II;
an oil inlet of the hydraulic control one-way valve IV is communicated with an oil outlet of the flowmeter I, and an oil outlet of the hydraulic control one-way valve IV is communicated with a rod cavity of the tested cylinder.
The high-pressure loading control module also comprises an oil return filter I, an overflow valve and a three-position four-way electromagnetic directional valve II;
an oil inlet of the overflow valve is communicated with an oil outlet of the high-pressure small-flow pump, and an oil outlet of the overflow valve is communicated with an oil return filter I;
an oil inlet of the two-position two-way electromagnetic ball valve is communicated with an oil outlet of the high-pressure small-flow pump, and an oil outlet of the two-position two-way electromagnetic ball valve is communicated with an oil return filter I;
the oil inlet of the energy accumulator valve bank is communicated with the oil outlet of the high-pressure small-flow pump, and the oil outlet of the energy accumulator valve bank is communicated with the oil return filter I;
an oil inlet of the three-position four-way electromagnetic reversing valve I is communicated with an oil outlet of the high-pressure small-flow pump, an oil return port of the three-position four-way electromagnetic reversing valve I is communicated with an oil return oil filter I, an oil outlet A of the three-position four-way electromagnetic reversing valve I is communicated with pilot control ports of a hydraulic control one-way valve VII and a hydraulic control one-way valve VIII, and an oil outlet B of the three-position four-way electromagnetic reversing valve I is communicated with pilot control ports of a hydraulic control one-way valve V and a;
an oil inlet of the three-position four-way electromagnetic reversing valve II is communicated with an oil outlet of the high-pressure small-flow pump, an oil return port of the three-position four-way electromagnetic reversing valve II is communicated with an oil return oil filter I, an oil outlet A of the three-position four-way electromagnetic reversing valve II is communicated with pilot control ports of the hydraulic control one-way valve III and the hydraulic control one-way valve IV, and an oil outlet B of the three-position four-way electromagnetic reversing valve II is communicated with pilot control ports of the hydraulic control one-way valve I and the hydraulic.
When the three-position four-way electromagnetic reversing valve II works at the left position, an oil way from the hydraulic control one-way valve I and the hydraulic control one-way valve II to the tested cylinder rod cavity in the internal leakage testing module I is opened, and an oil way from the hydraulic control one-way valve III, the flowmeter I, the hydraulic control one-way valve IV to the tested cylinder rod cavity is closed;
when the three-position four-way electromagnetic directional valve II works at the right position, an oil way from the hydraulic control one-way valve III, the flowmeter I and the hydraulic control one-way valve IV to the rod cavity of the tested cylinder in the internal leakage testing module I is opened, and an oil way from the hydraulic control one-way valve I and the hydraulic control one-way valve II to the rod cavity of the tested cylinder is closed.
When the three-position four-way electromagnetic reversing valve I works at the left position, an oil way from a hydraulic control one-way valve V and a hydraulic control one-way valve VI to a rodless cavity of the tested cylinder in the internal leakage testing module II is opened, and an oil way from a hydraulic control one-way valve VII, a flowmeter II, a hydraulic control one-way valve VIII to the rodless cavity of the tested cylinder is closed;
when the three-position four-way electromagnetic directional valve I works at the right position, an oil way from a hydraulic control one-way valve VII, a flowmeter II and a hydraulic control one-way valve VIII to a rodless cavity of the tested cylinder in the internal leakage testing module II is opened, and an oil way from a hydraulic control one-way valve V and a hydraulic control one-way valve VI to the rodless cavity of the tested cylinder is closed.
A test method for a hydraulic cylinder internal leakage amount rapid and accurate test system comprises the following steps:
the tested cylinder does not have the test mode of the discharge capacity in the cavity of the pole:
the starting motor II drives the low-pressure large-flow pump to work, the electro-hydraulic reversing valve reverses to work to the right, the low-pressure large flow enters a rodless cavity of the tested cylinder through the electro-hydraulic reversing valve, and the tested cylinder is driven to extend to the tail end of a stroke;
a starting motor I drives a high-pressure small-flow pump to work, a two-position two-way electromagnetic ball valve is electrified to work at an upper position, and an unloading oil way is closed;
an oil inlet stop valve of the energy accumulator valve bank is opened, an oil return stop valve is closed, the energy accumulator is flushed, and the constant pressure characteristic for absorbing pressure pulsation at the outlet of the pump and controlling the outlet pressure of the high-pressure small-flow pump is ensured;
an electromagnet at the right end of a three-position four-way electromagnetic reversing valve I is electrified and works at the right position, an oil way from a hydraulic control one-way valve VII, a flowmeter II and a hydraulic control one-way valve VIII to a rodless cavity of a tested cylinder in an inner leakage testing module I is driven to be opened, high-pressure power oil of a high-pressure small-flow pump applies pressure to the rodless cavity of the tested cylinder, and after the pressure quickly reaches rated test pressure and is stable, a rodless inner leakage value of the tested cylinder in unit time is read through the flowmeter II arranged in a rodless cavity pressurizing end pipeline of the tested cylinder;
the tested cylinder has a rod cavity internal leakage testing mode:
a starting motor II drives the low-pressure large-flow pump to work, the electro-hydraulic reversing valve reverses to a left position to work, the low-pressure large flow enters a rod cavity of the tested cylinder through the electro-hydraulic reversing valve, and the tested cylinder is driven to retract to the stroke tail end;
a starting motor I drives a high-pressure small-flow pump to work, a two-position two-way electromagnetic ball valve is electrified to work at an upper position, and an unloading oil way is closed;
an oil inlet stop valve of the energy accumulator valve bank is opened, an oil return stop valve is closed, the energy accumulator is flushed, and the constant pressure characteristic for absorbing pressure pulsation at the outlet of the pump and controlling the outlet pressure of the high-pressure small-flow pump is ensured;
the electromagnet at the right end of the three-position four-way electromagnetic reversing valve II is electrified to work at the right position, an oil path from a hydraulic control one-way valve III, a flowmeter I and a hydraulic control one-way valve IV to a rod cavity of a tested cylinder in the internal leakage test module II is driven to be opened, high-pressure power oil of a high-pressure small-flow pump applies pressure to the rod cavity of the tested cylinder, and after the pressure quickly reaches rated test pressure and is stable, the leakage value in the rod of the tested cylinder in unit time is read through the flowmeter I installed in a pipeline at the pressurizing end of the rod cavity of the tested cylinder.
The invention has the beneficial effects that: the hydraulic principle is novel, the functions are complete, and the rapid and accurate measurement of the leakage in the hydraulic cylinder can be realized; the universality is stronger, and the reference significance is provided for other similar product designs.
Drawings
FIG. 1 is a hydraulic schematic of the present invention;
in the figure: 1. a motor I, 2, a high-pressure small-flow pump 3-1, an oil return oil filter I, 3-2, an oil return oil filter II, 4, an oil level and temperature gauge 5, an air filter 6, a motor II, 7, a low-pressure large-flow pump 8, a check valve 9, an overflow valve 10-1, a pressure gauge I, 10-2, a pressure gauge II, 11, an energy accumulator valve group 12, an energy accumulator 13, a two-position two-way electromagnetic ball valve 14-1, a three-position four-way electromagnetic directional valve I, 14-2, a three-position four-way electromagnetic directional valve II,14-3, a three-position four-way electromagnetic directional valve III, 15-1, a hydraulic control check valve I, 15-2, a hydraulic control check valve II, 15-3, a hydraulic control check valve III, 15-4, a hydraulic control check valve IV, 15-5, a hydraulic control check valve V, 15-6 and a hydraulic control check valve VI, 15-7 parts of hydraulic control one-way valves VII and 15-8 parts of hydraulic control one-way valves VIII and 16-1 parts of hydraulic control one-way valves VIII and 17 parts of flow meters I and 16-2 parts of flow meters II and 17 parts of electromagnetic overflow valves 18 parts of electro-hydraulic reversing valves 19-1 parts of hydraulic control one-way valves VIIII and 19-2 parts of hydraulic control one-way valves VIIIII.
Detailed Description
The invention will be further explained with reference to the drawings.
Example one
As shown in FIG. 1, a system for rapidly and accurately testing the internal leakage amount of a hydraulic cylinder comprises a low-pressure operation control module, a high-pressure loading control module, an internal leakage testing module I, an internal leakage testing module II and a tested cylinder. The low-pressure operation control module provides low-pressure large-flow power oil for the tested cylinder, and the high-pressure loading control module provides high-pressure small-flow power oil for the tested cylinder.
The low-voltage operation control module:
the low-pressure large-flow pump 7 is driven by a motor II 6; the low-pressure large-flow power oil is provided for the tested cylinder to perform test operation and other test items according to the national standard;
an oil inlet of the one-way valve 8 is communicated with an oil outlet of the low-pressure large-flow pump 7; a low-pressure large-flow pump 7 for preventing the load pressure of the cylinder to be tested from reversely impacting;
the pressure gauge II10-2 is communicated with an oil outlet of the one-way valve 8;
an oil inlet of the electromagnetic overflow valve 17 is communicated with an oil outlet of the one-way valve 8, and an oil outlet of the electromagnetic overflow valve 17 is communicated with an oil inlet of the return oil filter II 3-2; the device is used for controlling the pressure of the power oil output by the low-pressure large-flow pump 7 and realizing unloading;
an oil inlet of the electro-hydraulic reversing valve 18 is communicated with an oil outlet of the one-way valve 8, an oil return port of the electro-hydraulic reversing valve 18 is communicated with an oil inlet of an oil return oil filter II3-2, an oil outlet A of the electro-hydraulic reversing valve 18 is communicated with an oil inlet of a hydraulic control one-way valve VIIII19-1, and an oil outlet B of the electro-hydraulic reversing valve 18 is communicated with an oil inlet of a hydraulic control one-way valve VIIIII 19-2;
an oil inlet of a three-position four-way electromagnetic reversing valve III14-3 is communicated with an oil outlet of the one-way valve 8, an oil return port of the three-position four-way electromagnetic reversing valve III14-3 is communicated with an oil tank, an oil outlet A of the three-position four-way electromagnetic reversing valve III14-3 is communicated with a pilot control port of a hydraulic control one-way valve 19-1, and an oil outlet B of the three-position four-way electromagnetic reversing valve III14-3 is communicated with a pilot control port of a hydraulic control one-way valve VIIIII 19-;
an oil outlet of the hydraulic control one-way valve VIIII19-1 is communicated with an oil port of a rodless cavity of the tested cylinder and an oil outlet of the internal leakage testing module II; an oil outlet of the hydraulic control one-way valve VIIIII19-2 is communicated with an oil outlet of a rod cavity of the tested cylinder and an oil outlet of the internal leakage testing module I.
The hydraulic control one-way valve VIIII and the hydraulic control one-way valve VIIIII belong to an ultrahigh pressure type, and when the high-pressure loading control module respectively applies high-pressure oil to two cavities of the tested cylinder, the hydraulic control one-way valve VIIII and the hydraulic control one-way valve VIIIII are used for isolating the high-pressure cavity and preventing elements such as the electro-hydraulic reversing valve 18 from being damaged.
The high-pressure loading control module:
the high-pressure small-flow pump 2 is driven by a motor I1; providing high-pressure small-flow power oil for the tested cylinder to perform a pressure resistance test and an internal leakage test according to the national standard;
an oil inlet of the overflow valve 9 is communicated with an oil outlet of the high-pressure small-flow pump 2, and an oil outlet of the overflow valve 9 is communicated with an oil return filter I3-1; the high-pressure small-flow pump 2 is used for controlling the pressure of the power oil output by the high-pressure small-flow pump;
an oil inlet of the two-position two-way electromagnetic ball valve 13 is communicated with an oil outlet of the high-pressure small-flow pump 2, and an oil outlet of the two-position two-way electromagnetic ball valve 13 is communicated with an oil return filter I3-1; the high-pressure small-flow pump 2 is used for controlling the working state of the high-pressure small-flow pump to be pressurized or unloaded;
the oil inlets of the energy accumulator valve group 11 and the energy accumulator 12 are communicated with the oil outlet of the high-pressure small-flow pump 2, and the oil outlet of the energy accumulator valve group 11 is communicated with an oil return filter I3-1; the constant pressure characteristic is used for absorbing pressure pulsation of an outlet of the pump and controlling outlet pressure of the high-pressure small-flow pump 2, so that the test accuracy of the internal leakage test module I and the internal leakage test module II is ensured;
the pressure gauge I10-1 is connected with the oil outlet of the high-pressure small-flow pump 2;
an oil inlet of a three-position four-way electromagnetic reversing valve I14-1 is communicated with an oil outlet of a high-pressure small-flow pump 2, an oil return port of the three-position four-way electromagnetic reversing valve I14-1 is communicated with an oil return filter I3-1, an oil outlet A of the three-position four-way electromagnetic reversing valve I14-1 is communicated with pilot control ports of a hydraulic control one-way valve VII15-7 and a hydraulic control one-way valve VIII15-8, and an oil outlet B of the three-position four-way electromagnetic reversing valve I14-1 is communicated with pilot control ports of a hydraulic control one-way valve V15-5 and a hydraulic control one-;
an oil inlet of the three-position four-way electromagnetic reversing valve II14-2 is communicated with an oil outlet of the high-pressure small-flow pump 2, an oil return port of the three-position four-way electromagnetic reversing valve II14-2 is communicated with an oil return oil filter I3-1, an oil outlet A of the three-position four-way electromagnetic reversing valve II14-2 is communicated with pilot control ports of the hydraulic control one-way valve III15-3 and the hydraulic control one-way valve IV15-4, and an oil outlet B of the three-position four-way electromagnetic reversing valve II14-2 is communicated with pilot control ports of the hydraulic control one-way valve I15-1, the hydraulic control one-.
The three-position four-way electromagnetic directional valve I14-1 and the three-position four-way electromagnetic directional valve II14-2 are used for controlling opening and closing of a hydraulic control one-way valve I15-1, a hydraulic control one-way valve II15-2, a hydraulic control one-way valve III15-3, a hydraulic control one-way valve IV15-4, a hydraulic control one-way valve V15-5, a hydraulic control one-way valve VI15-6, a hydraulic control one-way valve VII15-7 and a hydraulic control one-way valve VIII15-8 in the internal leakage testing module I and the internal leakage testing module II.
Internal leakage testing module II:
an oil outlet of the hydraulic control one-way valve V15-5 is communicated with an oil outlet of the high-pressure small-flow pump 2, an oil inlet of the hydraulic control one-way valve V15-5 is communicated with an oil inlet of the hydraulic control one-way valve VI15-6, and a pilot control port of the hydraulic control one-way valve V15-5 is communicated with a pilot control port of the hydraulic control one-way valve VI15-6 and an oil outlet B of the three-position four-way electromagnetic directional valve I14-1;
an oil outlet of the hydraulic control one-way valve VI15-6 is communicated with a rodless cavity of the tested cylinder;
an oil inlet of a hydraulic control one-way valve VII15-7 is communicated with an oil inlet of a flowmeter II16-2, an oil outlet of the hydraulic control one-way valve VII15-7 is communicated with an oil outlet of a high-pressure small-flow pump 2, and a pilot control port of the hydraulic control one-way valve VII15-7 and a pilot control port of a hydraulic control one-way valve VIII15-8 are communicated with an oil outlet A of a three-position four-way electromagnetic directional valve I14-1;
an oil inlet of the hydraulic control one-way valve VIII15-8 is communicated with an oil outlet of the flowmeter II16-2, and an oil outlet of the hydraulic control one-way valve VIII15-8 is communicated with a rodless cavity of the tested cylinder.
When the three-position four-way electromagnetic reversing valve I14-1 works at the left position, an oil way from a hydraulic control one-way valve V15-5 and a hydraulic control one-way valve VI15-6 to a rodless cavity of a tested cylinder in the internal leakage testing module II is opened, and an oil way from a hydraulic control one-way valve VII15-7, a flowmeter II16-2 and a hydraulic control one-way valve VIII15-8 to the rodless cavity of the tested cylinder is closed;
when the three-position four-way electromagnetic reversing valve I14-1 works at the right position, the oil way from the hydraulic control one-way valve VII15-7, the flowmeter II16-2 and the hydraulic control one-way valve VIII15-8 to the rodless cavity of the tested cylinder in the internal leakage testing module II is opened, and the oil way from the hydraulic control one-way valve V15-5 and the hydraulic control one-way valve VI15-6 to the rodless cavity of the tested cylinder is closed.
Internal leakage test module I:
an oil outlet of a hydraulic control one-way valve I15-1 is communicated with an oil outlet of a high-pressure small-flow pump 2, an oil inlet of a hydraulic control one-way valve I15-1 is communicated with an oil inlet of a hydraulic control one-way valve II15-2, and a pilot control port of the hydraulic control one-way valve I15-1 and a pilot control port of the hydraulic control one-way valve II15-2 are communicated with an oil outlet B of a three-position four-way electromagnetic directional valve II 14-2;
an oil outlet of the hydraulic control one-way valve II15-2 is communicated with a rod cavity of the tested cylinder;
an oil inlet of a hydraulic control one-way valve III15-3 is communicated with an oil inlet of a flowmeter I16-1, an oil outlet of the hydraulic control one-way valve III15-3 is communicated with an oil outlet of a high-pressure small-flow pump 2, and a pilot control port of the hydraulic control one-way valve III15-3 and a pilot control port of a hydraulic control one-way valve IV15-4 are communicated with an oil outlet A of a three-position four-way electromagnetic directional valve II 14-2;
an oil inlet of the hydraulic control one-way valve IV15-4 is communicated with an oil outlet of the flowmeter I16-1, and an oil outlet of the hydraulic control one-way valve IV15-4 is communicated with a rod cavity of the tested cylinder.
When the three-position four-way electromagnetic reversing valve II14-2 works at the left position, the oil way from the hydraulic control one-way valve I15-1 and the hydraulic control one-way valve II15-2 to the rod cavity of the tested cylinder in the internal leakage testing module I is opened, and the oil way from the hydraulic control one-way valve III15-3, the flowmeter I16-1 and the hydraulic control one-way valve IV15-4 to the rod cavity of the tested cylinder is closed;
when the three-position four-way electromagnetic reversing valve II14-2 works at the right position, the oil way from the hydraulic control one-way valve III15-3, the flowmeter I16-1 and the hydraulic control one-way valve IV15-4 to the rod cavity of the tested cylinder in the internal leakage testing module I is opened, and the oil way from the hydraulic control one-way valve I15-1 and the hydraulic control one-way valve II15-2 to the rod cavity of the tested cylinder is closed.
Example two
A test method for a rapid and accurate test system of leakage in a hydraulic cylinder comprises the following steps based on the first embodiment:
the tested cylinder does not have the test mode of the discharge capacity in the cavity of the pole:
firstly, a starting motor II6 drives a low-pressure high-flow pump 7 to work, an electro-hydraulic reversing valve 18 reverses to work to the right, and low-pressure high flow enters a rodless cavity of a tested cylinder through the electro-hydraulic reversing valve 18 to drive the tested cylinder to extend to the tail end of a stroke;
secondly, a starting motor I1 drives the high-pressure small-flow pump 2 to work, the two-position two-way electromagnetic ball valve 13 is electrified to work at an upper position, and an unloading oil way is closed;
an oil inlet stop valve of the energy accumulator valve group 11 is opened, an oil return stop valve is closed, the energy accumulator 12 flushes liquid, and the constant pressure characteristic for absorbing pressure pulsation of an outlet of the pump and controlling the outlet pressure of the high-pressure small-flow pump 2 is ensured;
an electromagnet at the right end of a three-position four-way electromagnetic reversing valve I14-1 is electrified to work at the right position, an oil path from a hydraulic control one-way valve VII15-7, a flowmeter II16-2 and a hydraulic control one-way valve VIII15-8 to a rodless cavity of a tested cylinder in a driving inner leakage testing module I is opened, high-pressure power oil of a high-pressure small-flow pump 2 exerts pressure on the rodless cavity of the tested cylinder, and after the pressure quickly reaches rated testing pressure and is stable, a rodless inner leakage value of the tested cylinder in unit time is read through a flowmeter II16-2 installed in a rodless cavity pressurizing end pipeline of the tested cylinder.
The test principle is as follows:
according to a pressure calculation formula of the steady-state closed cavity,
ΔP=E*ΔV/V，
delta P is the pressure variation corresponding to delta V in the closed cavity;
Δ V: the volume change of the closed cavity when the pressure is increased to P + delta P;
e: the bulk modulus of elasticity of the hydraulic oil;
therefore, the high-pressure pump can automatically supplement a certain amount of hydraulic oil into the rodless cavity of the tested cylinder through the flowmeter II16-2, so that the pressure of the cavity is kept constant. Therefore, the internal leakage value of the rodless cavity of the tested cylinder can be automatically detected through the feedback value of the flowmeter II 16-2.
The tested cylinder has a rod cavity internal leakage testing mode:
firstly, a starting motor II6 drives a low-pressure high-flow pump 7 to work, an electro-hydraulic reversing valve 18 reverses to work to the left, and low-pressure high-flow enters a rod cavity of a tested cylinder through the electro-hydraulic reversing valve 18 to drive the tested cylinder to retract to the tail end of a stroke;
secondly, a starting motor I1 drives the high-pressure small-flow pump 2 to work, the two-position two-way electromagnetic ball valve 13 is electrified to work at an upper position, and an unloading oil way is closed;
an oil inlet stop valve of the energy accumulator valve group 11 is opened, an oil return stop valve is closed, the energy accumulator 12 flushes liquid, and the constant pressure characteristic for absorbing pressure pulsation of an outlet of the pump and controlling the outlet pressure of the high-pressure small-flow pump 2 is ensured;
an electromagnet at the right end of a three-position four-way electromagnetic reversing valve II14-2 is electrified to work at the right position, an oil path from a hydraulic control one-way valve III15-3, a flow meter I16-1 and a hydraulic control one-way valve IV15-4 to a rod cavity of a tested cylinder in a driving inner leakage testing module II is opened, high-pressure power oil of a high-pressure small-flow pump 2 exerts pressure on the rod cavity of the tested cylinder, and after the pressure quickly reaches rated testing pressure and is stable, a rod inner leakage value of the tested cylinder in unit time is read through a flow meter I16-1 arranged in a pressure end pipeline of the rod cavity of the tested cylinder.
The test principle is as follows:
according to a pressure calculation formula of the steady-state closed cavity,
ΔP=E*ΔV/V，
delta P is the pressure variation corresponding to delta V in the closed cavity;
Δ V: the volume change of the closed cavity when the pressure is increased to P + delta P;
e: the bulk modulus of elasticity of the hydraulic oil;
it can be known that how much hydraulic oil leaks into the rodless cavity of the tested cylinder from the closed cavity formed by the outlet of the high-pressure small-flow pump 2 and the rod cavity of the tested cylinder, how much hydraulic oil is automatically supplemented by the high-pressure pump, and the hydraulic oil is input into the rod cavity of the tested cylinder through the flow meter I16-1 for supplementation, so that the pressure of the cavity is kept constant. Therefore, the internal leakage value of the rod cavity of the tested cylinder can be automatically detected through the feedback value of the flowmeter I16-1.
Claims (10)
1. The utility model provides a let out quick accurate test system of leakage volume in pneumatic cylinder which characterized in that:
the device comprises a low-pressure operation control module, a high-pressure loading control module, an internal leakage testing module I, an internal leakage testing module II and a tested cylinder;
the low-pressure operation control module is connected with a rod cavity and a rodless cavity of the tested cylinder and provides low-pressure large-flow power oil for the tested cylinder;
the high-pressure loading control module is respectively connected with an inner leakage testing module I and an inner leakage testing module II, the inner leakage testing module I is connected with a rod cavity of the tested cylinder, the inner leakage testing module II is connected with a rodless cavity of the tested cylinder, and the high-pressure loading control module provides high-pressure low-flow power oil for the tested cylinder.
2. The system for rapidly and accurately testing the leakage rate of the hydraulic cylinder according to claim 1, is characterized in that: the low-pressure operation control module comprises a low-pressure large-flow pump (7) driven by a motor II (6), and an oil outlet of the low-pressure large-flow pump (7) is connected with a pressure gauge II (10-2) and an electro-hydraulic reversing valve (18); the electro-hydraulic directional valve (18) is connected with a rod cavity and a rodless cavity of the tested cylinder.
3. The system for rapidly and accurately testing the leakage rate of the hydraulic cylinder according to claim 2, is characterized in that: the low-pressure operation control module further comprises an oil level and temperature meter (4), an air filter (5), an oil return filter II (3-2), a one-way valve (8), an electromagnetic overflow valve (17), a three-position four-way electromagnetic reversing valve III (14-3), a hydraulic control one-way valve VIIII (19-1) and a hydraulic control one-way valve VIIIII (19-2);
an oil inlet of the one-way valve (8) is communicated with an oil outlet of the low-pressure high-flow pump (7);
an oil inlet of the electromagnetic overflow valve (17) is communicated with an oil outlet of the one-way valve (8), and an oil outlet of the electromagnetic overflow valve (17) is communicated with an oil inlet of the return oil filter II (3-2);
an oil inlet of the electro-hydraulic reversing valve (18) is communicated with an oil outlet of the one-way valve (8), an oil return port of the electro-hydraulic reversing valve (18) is communicated with an oil inlet of an oil return filter II (3-2), an oil outlet A of the electro-hydraulic reversing valve (18) is communicated with an oil inlet of a hydraulic control one-way valve VIIII (19-1), and an oil outlet B of the electro-hydraulic reversing valve (18) is communicated with an oil inlet of a hydraulic control one-way valve VIIIII (19-2);
an oil inlet of the three-position four-way electromagnetic reversing valve III (14-3) is communicated with an oil outlet of the one-way valve (8), an oil return port of the three-position four-way electromagnetic reversing valve III (14-3) is communicated with an oil tank, an oil outlet A of the three-position four-way electromagnetic reversing valve III (14-3) is communicated with a pilot control port of the hydraulic control one-way valve (19-1), and an oil outlet B of the three-position four-way electromagnetic reversing valve III (14-3) is communicated with a pilot control port of the hydraulic control one-way valve VIIIII (19-2);
the oil outlet of the hydraulic control one-way valve VIIII (19-1) is communicated with the oil port of the rodless cavity of the tested cylinder and the oil outlet of the internal leakage testing module II;
the oil outlet of the hydraulic control one-way valve VIIIII (19-2) is communicated with the oil outlet of the rod cavity of the tested cylinder and the oil outlet of the internal leakage testing module I.
4. The system for rapidly and accurately testing the leakage rate of the hydraulic cylinder according to claim 2, is characterized in that: the high-pressure loading control module comprises a high-pressure small-flow pump (2) driven by a motor I (1), and an oil outlet of the high-pressure small-flow pump (2) is connected with a pressure gauge I (10-1), an energy accumulator (12), a two-position two-way electromagnetic ball valve (13), a three-position four-way electromagnetic directional valve I (14-1) and a three-position four-way electromagnetic directional valve II (14-2); the two-position two-way electromagnetic ball valve (13) is connected to an oil tank; the three-position four-way electromagnetic directional valve I (14-1) and the three-position four-way electromagnetic directional valve II (14-2) are correspondingly connected with the inner leakage testing module II and the inner leakage testing module I.
5. The system for rapidly and accurately testing the leakage rate of the hydraulic cylinder according to claim 4, is characterized in that: the internal leakage testing module II comprises a hydraulic control one-way valve V (15-5), a hydraulic control one-way valve VI (15-6), a hydraulic control one-way valve VII (15-7) and a hydraulic control one-way valve VIII (15-8);
the oil outlet of the hydraulic control one-way valve V (15-5) is communicated with the oil outlet of the high-pressure small-flow pump (2), the oil inlet of the hydraulic control one-way valve V (15-5) is communicated with the oil inlet of the hydraulic control one-way valve VI (15-6), and the pilot control port of the hydraulic control one-way valve V (15-5) is communicated with the pilot control port of the hydraulic control one-way valve VI (15-6) and the oil outlet B of the three-position four-way electromagnetic reversing valve I (14-1);
an oil outlet of the hydraulic control one-way valve VI (15-6) is communicated with a rodless cavity of the tested cylinder;
an oil inlet of the hydraulic control one-way valve VII (15-7) is communicated with an oil inlet of the flowmeter II (16-2), an oil outlet of the hydraulic control one-way valve VII (15-7) is communicated with an oil outlet of the high-pressure small-flow pump (2), and a pilot control port of the hydraulic control one-way valve VII (15-7) and a pilot control port of the hydraulic control one-way valve VIII (15-8) are communicated with an oil outlet A of the three-position four-way electromagnetic directional valve I (14-1);
an oil inlet of the hydraulic control one-way valve VIII (15-8) is communicated with an oil outlet of the flowmeter II (16-2), and an oil outlet of the hydraulic control one-way valve VIII (15-8) is communicated with a rodless cavity of the tested cylinder.
6. The system for rapidly and accurately testing the leakage rate of the hydraulic cylinder according to claim 5, wherein: the internal leakage testing module I comprises a hydraulic control one-way valve I (15-1), a hydraulic control one-way valve II (15-2), a hydraulic control one-way valve III (15-3) and a hydraulic control one-way valve IV (15-4);
the oil outlet of the hydraulic control one-way valve I (15-1) is communicated with the oil outlet of the high-pressure small-flow pump (2), the oil inlet of the hydraulic control one-way valve I (15-1) is communicated with the oil inlet of the hydraulic control one-way valve II (15-2), and the pilot control port of the hydraulic control one-way valve I (15-1) and the pilot control port of the hydraulic control one-way valve II (15-2) are communicated with the oil outlet B of the three-position four-way electromagnetic reversing valve II (14-2);
the oil outlet of the hydraulic control one-way valve II (15-2) is communicated with a rod cavity of the tested cylinder;
an oil inlet of the hydraulic control one-way valve III (15-3) is communicated with an oil inlet of the flowmeter I (16-1), an oil outlet of the hydraulic control one-way valve III (15-3) is communicated with an oil outlet of the high-pressure small-flow pump (2), and a pilot control port of the hydraulic control one-way valve III (15-3) and a pilot control port of the hydraulic control one-way valve IV (15-4) are communicated with an oil outlet A of the three-position four-way electromagnetic directional valve II (14-2);
an oil inlet of the hydraulic control one-way valve IV (15-4) is communicated with an oil outlet of the flowmeter I (16-1), and an oil outlet of the hydraulic control one-way valve IV (15-4) is communicated with a rod cavity of the tested cylinder.
7. The system for rapidly and accurately testing the leakage rate of the hydraulic cylinder according to claim 6, wherein: the high-pressure loading control module also comprises an oil return filter I (3-1), an overflow valve (9) and a three-position four-way electromagnetic directional valve II (14-2);
an oil inlet of the overflow valve (9) is communicated with an oil outlet of the high-pressure small-flow pump (2), and an oil outlet of the overflow valve (9) is communicated with an oil return filter I (3-1);
an oil inlet of the two-position two-way electromagnetic ball valve (13) is communicated with an oil outlet of the high-pressure small-flow pump (2), and an oil outlet of the two-position two-way electromagnetic ball valve (13) is communicated with an oil return filter I (3-1);
the oil inlet of the energy accumulator valve group (11) is communicated with the oil inlet of the energy accumulator (12) and the oil outlet of the high-pressure small-flow pump (2), and the oil outlet of the energy accumulator valve group (11) is communicated with the oil return filter I (3-1);
an oil inlet of the three-position four-way electromagnetic reversing valve I (14-1) is communicated with an oil outlet of the high-pressure small-flow pump (2), an oil return port of the three-position four-way electromagnetic reversing valve I (14-1) is communicated with an oil return oil filter I (3-1), an oil outlet A of the three-position four-way electromagnetic reversing valve I (14-1) is communicated with pilot control ports of a hydraulic control one-way valve VII (15-7) and a hydraulic control one-way valve VIII (15-8), and an oil outlet B of the three-position four-way electromagnetic reversing valve I (14-1) is communicated with pilot control ports of a hydraulic control one-way valve V (15-5) and a hydraulic control one-way valve;
an oil inlet of the three-position four-way electromagnetic reversing valve II (14-2) is communicated with an oil outlet of the high-pressure small-flow pump (2), an oil return port of the three-position four-way electromagnetic reversing valve II (14-2) is communicated with an oil return oil filter I (3-1), an oil outlet A of the three-position four-way electromagnetic reversing valve II (14-2) is communicated with pilot control ports of the hydraulic control one-way valve III (15-3) and the hydraulic control one-way valve IV (15-4), and an oil outlet B of the three-position four-way electromagnetic reversing valve II (14-2) is communicated with pilot control ports of the hydraulic control one-way valve I (15-1), the hydraulic control one-way valve II.
8. The system of claim 7 for rapidly and accurately testing the amount of leakage in a hydraulic cylinder, wherein: when the three-position four-way electromagnetic directional valve II (14-2) works at the left position, oil ways from the hydraulic control one-way valve I (15-1) and the hydraulic control one-way valve II (15-2) to the tested cylinder rod cavity in the internal leakage testing module I are opened, and oil ways from the hydraulic control one-way valve III (15-3), the flowmeter I (16-1), the hydraulic control one-way valve IV (15-4) to the tested cylinder rod cavity are closed;
when the three-position four-way electromagnetic directional valve II (14-2) works at the right position, the oil way from the hydraulic control one-way valve III (15-3), the flowmeter I (16-1) and the hydraulic control one-way valve IV (15-4) to the rod cavity of the tested cylinder in the internal leakage testing module I is opened, and the oil way from the hydraulic control one-way valve I (15-1) and the hydraulic control one-way valve II (15-2) to the rod cavity of the tested cylinder is closed.
9. The system of claim 7 for rapidly and accurately testing the amount of leakage in a hydraulic cylinder, wherein: when the three-position four-way electromagnetic directional valve I (14-1) works at the left position, an oil way from a hydraulic control one-way valve V (15-5) and a hydraulic control one-way valve VI (15-6) to a rodless cavity of the tested cylinder in the internal leakage testing module II is opened, and an oil way from the hydraulic control one-way valve VII (15-7), the flowmeter II (16-2), the hydraulic control one-way valve VIII (15-8) to the rodless cavity of the tested cylinder is closed;
when the three-position four-way electromagnetic directional valve I (14-1) works at the right position, the oil way from the hydraulic control one-way valve VII (15-7), the flowmeter II (16-2) and the hydraulic control one-way valve VIII (15-8) to the rodless cavity of the tested cylinder in the internal leakage testing module II is opened, and the oil way from the hydraulic control one-way valve V (15-5) and the hydraulic control one-way valve VI (15-6) to the rodless cavity of the tested cylinder is closed.
10. A test method of a hydraulic cylinder internal leakage amount rapid and accurate test system, which adopts the hydraulic cylinder internal leakage amount rapid and accurate test system of any one of claims 6 to 9, and comprises the following steps:
the tested cylinder does not have the test mode of the discharge capacity in the cavity of the pole:
the starting motor II (6) drives the low-pressure high-flow pump (7) to work, the electro-hydraulic reversing valve (18) reverses to the right position to work, the low-pressure high flow enters a rodless cavity of a tested cylinder through the electro-hydraulic reversing valve (18) and drives the tested cylinder to extend to the tail end of a stroke;
secondly, a starting motor I (1) drives a high-pressure small-flow pump (2) to work, a two-position two-way electromagnetic ball valve (13) is electrified to work at an upper position, and an unloading oil way is closed;
an oil inlet stop valve of the energy accumulator valve group (11) is opened, an oil return stop valve is closed, the energy accumulator (12) flushes liquid, and the constant pressure characteristic for absorbing pressure pulsation of an outlet of the pump and controlling outlet pressure of the high-pressure small-flow pump (2) is ensured;
an electromagnet at the right end of a three-position four-way electromagnetic reversing valve I (14-1) is electrified and works at the right position, an oil way from a hydraulic control one-way valve VII (15-7), a flowmeter II (16-2) and a hydraulic control one-way valve VIII (15-8) to a rodless cavity of a tested cylinder in an inner leakage test module I is driven to be opened, high-pressure power oil of a high-pressure small-flow pump (2) applies pressure to the rodless cavity of the tested cylinder, and after the pressure quickly reaches rated test pressure and is stable, a rodless inner leakage value of the tested cylinder in unit time is read through a flowmeter II (16-2) installed in a rodless cavity pressurizing end pipeline of the tested cylinder;
the tested cylinder has a rod cavity internal leakage testing mode:
the starting motor II (6) drives the low-pressure high-flow pump (7) to work, the electro-hydraulic reversing valve (18) reverses to the left position to work, the low-pressure high flow enters a rod cavity of the cylinder to be tested through the electro-hydraulic reversing valve (18), and the cylinder to be tested is driven to retract to the stroke tail end;
secondly, a starting motor I (1) drives a high-pressure small-flow pump (2) to work, a two-position two-way electromagnetic ball valve (13) is electrified to work at an upper position, and an unloading oil way is closed;
an oil inlet stop valve of the energy accumulator valve group (11) is opened, an oil return stop valve is closed, the energy accumulator (12) flushes liquid, and the constant pressure characteristic for absorbing pressure pulsation of an outlet of the pump and controlling outlet pressure of the high-pressure small-flow pump (2) is ensured;
the electromagnet at the right end of the three-position four-way electromagnetic reversing valve II (14-2) is electrified to work at the right position, an oil path from a hydraulic control one-way valve III (15-3), a flow meter I (16-1) and a hydraulic control one-way valve IV (15-4) to a rod cavity of a tested cylinder in the inner leakage test module II is driven to be opened, high-pressure power oil of the high-pressure small-flow pump (2) exerts pressure on the rod cavity of the tested cylinder, and after the pressure quickly reaches rated test pressure and is stable, the rod inner leakage value of the tested cylinder in unit time is read through the flow meter I (16-1) installed in a pipeline at the rod cavity pressurizing end of the tested cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010560033.7A CN111692162B (en) | 2020-06-18 | 2020-06-18 | Rapid and accurate test system and test method for internal leakage amount of hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010560033.7A CN111692162B (en) | 2020-06-18 | 2020-06-18 | Rapid and accurate test system and test method for internal leakage amount of hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111692162A true CN111692162A (en) | 2020-09-22 |
| CN111692162B CN111692162B (en) | 2022-03-29 |
Family
ID=72481735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010560033.7A Expired - Fee Related CN111692162B (en) | 2020-06-18 | 2020-06-18 | Rapid and accurate test system and test method for internal leakage amount of hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111692162B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323493A (en) * | 2021-12-29 | 2022-04-12 | 广东南曦液压机械有限公司 | Automatic detection device and detection method for tiny leakage flow |
| CN114354165A (en) * | 2021-12-30 | 2022-04-15 | 广东南曦液压机械有限公司 | Hydraulic ultrahigh-pressure oil cylinder test bed and test method |
| CN114483712A (en) * | 2022-02-04 | 2022-05-13 | 浙江大学 | Hydraulic cylinder micro-internal leakage detection test bed and detection method thereof |
| CN114483711A (en) * | 2022-02-04 | 2022-05-13 | 浙江大学 | Constant parameter method for detecting and evaluating leakage in hydraulic cylinder and detection device thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865271A (en) * | 2012-09-28 | 2013-01-09 | 天津鼎成高新技术产业有限公司 | Detection method and device of internal leakage of hydraulic valve |
| CN107725536A (en) * | 2017-11-27 | 2018-02-23 | 四川万冠液压技术股份有限公司 | A kind of hydraulic jack loading test hydraulic system |
| WO2018153524A1 (en) * | 2017-02-24 | 2018-08-30 | Siemens Wind Power A/S | Method and arrangement to detect an oil leakage between sections of a hydraulic cylinder |
| CN108730266A (en) * | 2018-07-03 | 2018-11-02 | 徐州金鼎恒立液压件有限公司 | Discharge measuring device and method in a kind of hydraulic cylinder |
| CN110608215A (en) * | 2019-09-03 | 2019-12-24 | 江苏恒立液压科技有限公司 | Hydraulic system for hydraulic cylinder performance test and test method |
| CN111271341A (en) * | 2020-03-25 | 2020-06-12 | 湖南省产商品质量监督检验研究院 | High-precision detection test bed for internal leakage of hydraulic cylinder |
-
2020
- 2020-06-18 CN CN202010560033.7A patent/CN111692162B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865271A (en) * | 2012-09-28 | 2013-01-09 | 天津鼎成高新技术产业有限公司 | Detection method and device of internal leakage of hydraulic valve |
| WO2018153524A1 (en) * | 2017-02-24 | 2018-08-30 | Siemens Wind Power A/S | Method and arrangement to detect an oil leakage between sections of a hydraulic cylinder |
| CN107725536A (en) * | 2017-11-27 | 2018-02-23 | 四川万冠液压技术股份有限公司 | A kind of hydraulic jack loading test hydraulic system |
| CN108730266A (en) * | 2018-07-03 | 2018-11-02 | 徐州金鼎恒立液压件有限公司 | Discharge measuring device and method in a kind of hydraulic cylinder |
| CN110608215A (en) * | 2019-09-03 | 2019-12-24 | 江苏恒立液压科技有限公司 | Hydraulic system for hydraulic cylinder performance test and test method |
| CN111271341A (en) * | 2020-03-25 | 2020-06-12 | 湖南省产商品质量监督检验研究院 | High-precision detection test bed for internal leakage of hydraulic cylinder |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323493A (en) * | 2021-12-29 | 2022-04-12 | 广东南曦液压机械有限公司 | Automatic detection device and detection method for tiny leakage flow |
| CN114354165A (en) * | 2021-12-30 | 2022-04-15 | 广东南曦液压机械有限公司 | Hydraulic ultrahigh-pressure oil cylinder test bed and test method |
| CN114354165B (en) * | 2021-12-30 | 2024-04-12 | 广东南曦液压机械有限公司 | Hydraulic ultrahigh-pressure oil cylinder test bed and test method |
| CN114483712A (en) * | 2022-02-04 | 2022-05-13 | 浙江大学 | Hydraulic cylinder micro-internal leakage detection test bed and detection method thereof |
| CN114483711A (en) * | 2022-02-04 | 2022-05-13 | 浙江大学 | Constant parameter method for detecting and evaluating leakage in hydraulic cylinder and detection device thereof |
| CN114483711B (en) * | 2022-02-04 | 2022-11-29 | 浙江大学 | Constant parameter method for detecting and evaluating leakage in hydraulic cylinder and detection device thereof |
| CN114483712B (en) * | 2022-02-04 | 2023-04-07 | 浙江大学 | Hydraulic cylinder micro-internal leakage detection test bed and detection method thereof |
| WO2023147740A1 (en) * | 2022-02-04 | 2023-08-10 | 浙江大学 | Constant value parameter method for detecting and evaluating leakage in hydraulic cylinder and detection device thereof |
| US12092135B2 (en) | 2022-02-04 | 2024-09-17 | Zhejiang University | Constant value method for detecting and evaluating internal leakage of hydraulic cylinder and detection device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111692162B (en) | 2022-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111692162B (en) | Rapid and accurate test system and test method for internal leakage amount of hydraulic cylinder | |
| CN204716667U (en) | The Development of Hydraulic Synthetic Test-bed of servovalve dynamic and static state performance test | |
| CN106015139A (en) | Tension and compression testing machine hydraulic loading system adopting differential control of proportional overflow valves | |
| CN107023536A (en) | Engineering machinery hydraulic cylinder dynamic performance integrated test platform | |
| CN101458198A (en) | High-pressure high flow fatigue test system for bearing equipment | |
| CN103775442A (en) | Pump-controlled power recovery hydraulic control system of hydraulic cylinder testing test stand | |
| CN104895871A (en) | Comprehensive and energy-saving testing device and method for reliability of electromagnetic valves and hydraulic cylinders | |
| CN201636132U (en) | Hydraulic device for servo valve testing system | |
| CN101451922B (en) | Ultra-high pressure high flow supercharging and unloading system | |
| CN203685769U (en) | Oil cylinder test board control system | |
| CN111550474B (en) | Hydraulic system for double-cylinder synchronous load lateral force test bed | |
| CN104776086A (en) | Remanufactured oil cylinder performance detection platform | |
| CN109696308A (en) | Aviation actuator load testing machine and its loading method under vibration environment | |
| CN108730266B (en) | Device and method for measuring internal leakage of hydraulic cylinder | |
| CN104074840B (en) | Digital valve pilot system | |
| CN110159616B (en) | Metallurgical hydraulic cylinder performance test system and test method thereof | |
| CN111350708A (en) | Hydraulic device of electro-hydraulic type pressure testing machine | |
| CN209624684U (en) | A kind of 400MPa extra-high simple loading unit | |
| CN212748550U (en) | Large-tonnage long-time load-holding test system based on servo pump | |
| CN102304931B (en) | Hydraulic energy-saving control system and method for loader movable arm | |
| CN114278649A (en) | Hydraulic cylinder working condition simulation test device, control system and method | |
| CN205117850U (en) | Servo pump control hydraulic system | |
| CN204082776U (en) | Digital valve pilot system | |
| CN109624254B (en) | High-response injection molding machine servo pump cylinder injection system | |
| CN202631265U (en) | Tractor hydraulic hoisting test device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220329 |