CN116336038A - Hydraulic valve durability test hydraulic circuit and test method - Google Patents
Hydraulic valve durability test hydraulic circuit and test method Download PDFInfo
- Publication number
- CN116336038A CN116336038A CN202310340928.3A CN202310340928A CN116336038A CN 116336038 A CN116336038 A CN 116336038A CN 202310340928 A CN202310340928 A CN 202310340928A CN 116336038 A CN116336038 A CN 116336038A
- Authority
- CN
- China
- Prior art keywords
- valve
- test
- pressure sensor
- hydraulic
- electromagnetic valve
- 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.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 190
- 238000010998 test method Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 claims description 22
- 238000007619 statistical method Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 238000004092 self-diagnosis Methods 0.000 claims description 5
- 238000000528 statistical test Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 description 31
- 239000010720 hydraulic oil Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 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
-
- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/027—Installations or systems with accumulators having accumulator charging devices
-
- 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
- F15B19/005—Fault detection or monitoring
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a hydraulic valve durability test hydraulic circuit and a test method, wherein the hydraulic circuit comprises a plurality of hydraulic test circuit groups and a plurality of tested balance valves connected with the hydraulic test circuit groups; pressure sensors are arranged between the first energy accumulator and the first electromagnetic valve, between the second energy accumulator and the second electromagnetic valve, between the first electromagnetic valve and a first tested balance valve port A, between two tested balance valve ports B, between the second electromagnetic valve and a second tested balance valve port C, and between a port C of the first tested balance valve and a port A of the second tested balance valve; the input end of the controller is connected with each pressure sensor and receives the pressure value; the output end of the controller is connected with the first hydraulic pump, the second hydraulic pump, the first electromagnetic valve and the second electromagnetic valve, the pressure value monitored by the pressure sensor is compared with a preset threshold value by the controller, and different control signals are output according to the comparison result. The scheme has high automation degree and has the functions of automatically counting the test times, self-diagnosing and detecting the failure of the tested piece.
Description
Technical Field
The invention belongs to a hydraulic test bed testing technology, and particularly relates to a hydraulic circuit and a test method for a durability test of a hydraulic valve.
Background
In engineering machinery, a hydraulic valve is used as a control element of a hydraulic system, the durability of the hydraulic valve directly influences the reliability of the whole machine operation, taking a balance valve as an example, based on the consideration of system safety and stable control, the balance valve is usually arranged in a mechanism with load falling, such as a lifting mechanism, an amplitude changing mechanism and a telescopic mechanism in the engineering hoisting machinery, and in order to improve the service performance of the engineering hoisting machinery, particularly in the load falling working condition, the operation accidents and the like caused by acceleration falling are avoided, and the balance valve is arranged at a hydraulic actuating element of each mechanism to realize the inching and stable control of the falling. Therefore, the safety and reliability of the hydraulic balance valve directly influence the safety and reliability of the arm support or the whole machine. In general, in order to ensure the safety and reliability of a hydraulic valve, durability tests are performed on the manufactured hydraulic valve, and researches on the principle and method of the durability tests of the hydraulic valve are urgent problems to be solved by hydraulic technicians.
At present, in a hydraulic circuit for performing a durability test on a hydraulic balance valve in the prior art of JB/T9739.1-2000 automobile crane and tire crane balance valve, the requirements on the reliability test of the balance valve are as follows: under the nominal flow and the nominal pressure, reversing impact is carried out for 1.5 ten thousand times, main parts cannot be damaged and abnormally worn, and the performance of the reversing impact meets the requirements of 4.1 and 4.2. According to the scheme, aiming at the hydraulic circuit for testing the reliability of the balance valve, a manual reversing valve is adopted to switch and operate an oil way, the performance of the balance valve is tested, and if the durability test is carried out, the feasibility is not high; in addition, even if the high-flow electrohydraulic control reversing valve is replaced, reversing impact is carried out for 1.5 ten thousand times under the nominal flow and the nominal pressure of the balance valve according to the standard requirement, the impact loss of the pressure flow of the motor pump group and the system safety valve is increased, and the system test loss is high; furthermore, the test circuit only tests the unidirectional conduction and reverse control reliability of a single balance valve, and the durability or stability of the balance valve is difficult to effectively evaluate due to the small sample size.
The prior art with the patent number of CN215805447U provides a hydraulic circuit for a durability test of a balance valve, which can simultaneously meet the durability test of one-way conduction and reverse control functions of a plurality of balance valves. However, the intelligent degree of the durability test of the hydraulic valve is not high, and the number of times of the test piece, the running state of the test stand and the tracing of the data when the test piece fails can not be effectively inquired.
Disclosure of Invention
The invention aims to: the invention aims to provide a hydraulic valve durability test hydraulic circuit with an automatic control function and high intelligent degree; the invention further aims to provide a hydraulic valve durability test method which can automatically count the test times, detect the failure of a tested piece and conduct fault self-diagnosis.
The technical scheme is as follows: the hydraulic valve durability test hydraulic circuit comprises a plurality of hydraulic test circuit groups and a plurality of tested balance valves connected with the hydraulic test circuit groups; each hydraulic test circuit group comprises a pair of opposite forward hydraulic test circuits and reverse hydraulic test circuits; the positive hydraulic test loop comprises a first hydraulic pump connected with the oil tank, and the first hydraulic pump is respectively connected with a first energy accumulator and a first electromagnetic valve through a first one-way valve; the first electromagnetic valve is also connected with the port A of the first tested balance valve and the oil tank; the reverse hydraulic test loop comprises a second hydraulic pump connected with the oil tank, and the second hydraulic pump is respectively connected with a second accumulator and a second electromagnetic valve through a second one-way valve; the second electromagnetic valve is also connected with a port C of a second tested balance valve and an oil tank; the port B of the first tested balance valve is connected with the port B of the second tested balance valve; the port C of the first tested balance valve is connected with the oil tank; the port A of the second tested balance valve is connected with the oil tank; a first pressure sensor is arranged on a pipeline between the first energy accumulator and the first electromagnetic valve; a second pressure sensor is arranged on a pipeline between the second energy accumulator and the second electromagnetic valve; a third pressure sensor is arranged on a pipeline between the first electromagnetic valve and the port A of the first tested balance valve; a fourth pressure sensor is arranged on a pipeline between the port B of the first tested balance valve and the port B of the second tested balance valve; a fifth pressure sensor is arranged on a pipeline between the second electromagnetic valve and a port C of the second tested balance valve; a sixth pressure sensor is arranged on a pipeline between the port A of the second tested balance valve, the port C of the first tested balance valve and the oil tank; the pressure sensor is used for detecting the pressure of the air flow, and the pressure sensor is used for detecting the pressure of the air flow; the output end of the controller is electrically connected with the first hydraulic pump, the second hydraulic pump, the first electromagnetic valve and the second electromagnetic valve, the controller compares the pressure value monitored by the pressure sensor with a preset threshold value, and different control signals are output according to the comparison result, so that the first hydraulic pump, the second hydraulic pump, the first electromagnetic valve and the second electromagnetic valve are controlled to act.
The output end of the first one-way valve is connected with the oil tank through a first electric proportional overflow valve, and the output end of the second one-way valve is connected with the oil tank through a second electric proportional overflow valve; the output end of the controller is electrically connected with the first electric proportional relief valve and the second electric proportional relief valve, and the controller outputs control currents of the first electric proportional relief valve and the second electric proportional relief valve.
The port C of the first tested balance valve is connected with an oil tank through a third electric proportional overflow valve; the output end of the controller is electrically connected with the third electric proportional relief valve, and the controller outputs control current of the third electric proportional relief valve.
An oil return filter is arranged at the inlet of the oil tank, and can filter hydraulic oil flowing back to the oil tank from each element.
The invention further comprises a hydraulic valve durability test method which is applied to the hydraulic circuit for the hydraulic valve durability test.
The hydraulic valve durability test hydraulic circuit is subjected to an automatic test counting test by adopting the following steps:
s1: the controller receives pressure values detected by the first pressure sensor, the second pressure sensor and the fourth pressure sensor;
s2: the controller compares the pressure value detected by the fourth pressure sensor with the maximum set value of the pressure value, and controls the first electromagnetic valve to lose power or the second electromagnetic valve to lose power according to the comparison result;
s3: the durability test count statistical method of the first tested balance valve (111): after the first electromagnetic valve is powered off, judging whether the pressure value detected by the first pressure sensor is in a range interval of a maximum set value and a minimum set value, if so, controlling the first electromagnetic valve to be powered on by a controller, and starting cycle counting by the controller, wherein the reversing times of the first electromagnetic valve are used as the test times of the unidirectional function; when the pressure value detected by the fourth pressure sensor is smaller than the set minimum value, the test bed performs a durability test of the first tested balance valve and counts until the test times reach the design value;
s4: durability test count statistical method for the second tested balance valve: after the second electromagnetic valve is powered off, judging whether the pressure value detected by the second pressure sensor is in a range interval between a maximum set value and a minimum set value, if so, controlling the second electromagnetic valve to be powered on by the controller, and starting cycle counting by the controller, wherein the reversing times of the second electromagnetic valve are used as the test times of a reverse control function; and when the pressure value detected by the fourth pressure sensor is larger than the set minimum value, the test bed performs the durability test of the second tested balance valve and counts until the test times reach the design value, and the test is ended.
The method comprises an automatic charging function of the first accumulator and the second accumulator; automatic charging function of the first accumulator: when the controller receives that the pressure value of the first pressure sensor is lower than a set minimum value, the controller outputs a control signal to start the first hydraulic pump to charge the first energy accumulator until the pressure value of the first pressure sensor is detected to reach the set maximum value, and the controller outputs the control signal to stop the first hydraulic pump; automatic charging function of the second energy accumulator: when the controller receives that the pressure value of the second pressure sensor is lower than the set minimum value, the controller outputs a control signal to start the second hydraulic pump to charge the second energy accumulator until the pressure value of the second sensor reaches the set maximum value, and the controller outputs the control signal to stop the second hydraulic pump.
A method for automatically detecting failure of a test piece when performing a durability test, comprising the steps of: when the first tested balance valve unidirectional function durability test is carried out, when the first electromagnetic valve is powered off, if the pressure detected by the fourth pressure sensor cannot keep the pressure value of the sensor before the first electromagnetic valve is powered off, the first tested balance valve unidirectional function is indicated to be invalid, at the moment, prompt and alarm are carried out, the test piece is invalid, and the durability test is automatically stopped.
The durability test for automatically detecting the failure of a tested piece by utilizing the hydraulic valve durability test hydraulic circuit comprises the following steps: when the second tested balance valve reverse control function durability test is performed, when the pressure value detected by the fourth pressure sensor is powered on along with the second electromagnetic valve and cannot be decompressed, and the pressure of the fifth pressure sensor is normal, the balance valve reverse control function is prompted to fail, and the durability test is automatically stopped; or when the first tested balance valve is subjected to one-way test, the third pressure sensor and the fourth pressure sensor can normally build pressure when the first electromagnetic valve is powered on, and the fourth pressure sensor is instantly subjected to pressure loss after the second electromagnetic valve is powered off, so that the second tested balance valve is considered to be invalid, and the durability test is automatically stopped.
When the self-diagnosis test of the hydraulic circuit is performed, the method comprises the following steps: the third pressure sensor and the detected pressure value are frequently built and decompressed along with the power failure of the first electromagnetic valve, and the first electromagnetic valve is indicated to have faults when the third pressure sensor is detected to be incapable of decompressing or the third pressure sensor is detected to be incapable of normally building the pressure when the first electromagnetic valve is powered on in the test process; the pressure value detected by the fifth pressure sensor is frequently built and decompressed along with the power failure of the second electromagnetic valve, and the fault of the second electromagnetic valve is indicated when the fact that the fifth pressure sensor cannot decompress or the fifth pressure sensor cannot build the pressure normally when the first electromagnetic valve is powered on is detected in the test process; in the test process, the first accumulator is filled with liquid, and when the fact that the first pressure sensor cannot normally build pressure is detected, the test bed prompts the first electric proportional overflow valve or the oil pump to be in fault; and in the test process, the second accumulator is filled with liquid, and when the fact that the second pressure sensor cannot normally build pressure is detected, the test bed prompts the fault of the second electric proportional relief valve or the oil pump.
The beneficial effects are that: compared with the prior art, the technical scheme of the invention has the beneficial effects that:
(1) The hydraulic circuit has an automatic control function, namely, the automatic control of the hydraulic oil pump and the electromagnetic valve is realized through a controller by a certain algorithm through a pressure sensor of a detection system and a set threshold value, so that the dependence of a durability test on people is reduced;
(2) The hydraulic circuit has an automatic counting function, the test times of a tested piece are calculated by recording the reversing times of the reversing valve and the pressure value of the sensor, and the test times of the durability of the hydraulic valve are counted by storing the test times by the controller;
(3) The test bed has the functions of self-diagnosis and automatic identification of the failure of the tested piece, and the fault point of the test bed and the time when the tested piece fails are automatically judged by detecting the pump outlet pressure, the pressure before and after the tested piece and the threshold value set by the corresponding pressure measuring point pressure, so that an experimenter can conveniently maintain the test bed and quickly and accurately search the data when the tested piece fails;
(4) The hydraulic valve has higher reliability, certain hydraulic energy is stored through the energy accumulator, the durability test of the hydraulic valve is met, when the pressure value of the system pressure sensor is reduced to a set off-line value, the motor pump set is started to charge the energy accumulator, the motor pump set is stopped after the system pressure reaches the designed maximum value, the durability test is carried out by means of the energy accumulator, and the high-pressure running time of the motor pump is reduced. In principle, the pump outlet pressure variation range of the single durability test is small, the frequency of the reciprocating variable is low, the loss of the pump is reduced to the minimum, and the reliability of the system is enhanced.
Drawings
FIG. 1 is a schematic diagram of a hydraulic valve durability test hydraulic circuit according to the present invention;
fig. 2 is a logic diagram of a hydraulic valve durability test method according to the present invention.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the detailed description and the attached drawings.
As shown in FIG. 1, the hydraulic valve durability test hydraulic circuit comprises a plurality of hydraulic test circuit groups and a plurality of tested balance valves connected with the hydraulic test circuit groups, so that the durability test of a plurality of (more than or equal to 6) balance valves can be simultaneously carried out, and the durability test of the unidirectional conduction and reverse control functions of the hydraulic valve durability test hydraulic circuit can be simultaneously realized. Each hydraulic test circuit group comprises a pair of oppositely arranged forward hydraulic test circuits and reverse hydraulic test circuits. Through the serial-parallel connection of the energy accumulator, the two-position three-way electromagnetic valve group and the tested piece, the durability test of the single-phase performance and the reverse proportion control function of the balance valves is realized, and the service life of the durability test bench can be prolonged by means of the durability test of the energy accumulator. In particular to the following elements: the drive unit 1, the first hydraulic pump 21, the second hydraulic pump 22, the tank 3, the filter 4, the first electric proportional relief valve 51, the second electric proportional relief valve 52, the third electric proportional relief valve 53, the first solenoid valve 61, the second solenoid valve 62, the first check valve 71, the second check valve 72, the first accumulator 81, the second accumulator 82, the first pressure sensor 91, the second pressure sensor 92, the third pressure sensor 93, the fourth pressure sensor 94, the fifth pressure sensor 95, the sixth pressure sensor 96, the shutoff valves 101 to 1012, the first balance valve 111, the second balance valve 112, and the controller 12. In this solution, the first hydraulic pump 21 and the second hydraulic pump 22 may be constant displacement pumps, constant pressure pumps, load sensitive pumps, electric control pumps, etc.; the electric proportional overflow valves 51-53 can be manually operated adjusting overflow valves, hydraulic control proportional overflow valves and electric proportional overflow valves; the first electromagnetic valve 61 and the second electromagnetic valve 62 can be electromagnetic ball valves, electro-hydraulic reversing valves, electromagnetic logic cartridge valves and the like; the tested hydraulic valves comprise, but are not limited to, balance valves, hydraulic locks, reversing valves and the like, and the tested pieces can be connected in parallel, wherein the number of the tested pieces is more than or equal to two. The first hydraulic pump 21 mainly supplies a high-pressure oil source to the test piece. The second hydraulic pump 22 mainly supplies a pilot oil source to the test piece. The first accumulator 81 and the second accumulator 82 are oil storage devices of a main oil path, a pilot oil path and a tested piece oil path respectively. The first electric proportional relief valve 51, the second electric proportional relief valve 52, and the third electric proportional relief valve 53 set the highest operating pressures for the main oil passage, the pilot oil passage, and the test piece, respectively. The first pressure sensor 91, the second pressure sensor 92, the third pressure sensor 93, the fourth pressure sensor 94, the fifth pressure sensor 95, and the sixth pressure sensor 96 detect the pressures at the respective positions, and each sensor has a maximum value and a minimum value when performing a durability test. The controller 12 receives the pressure value of the system through a sensor, and outputs the automatic control of the signal test bed of the pump, the electromagnetic valve and the electric proportional overflow valve through calculation.
The forward hydraulic test circuit comprises a first hydraulic pump 21 connected with the oil tank 3, and the first hydraulic pump 21 is respectively connected with a first accumulator 81 and a first electromagnetic valve 61 through a first check valve 71; the first solenoid valve 61 is also connected to the port a of the first balance valve 111 to be tested and the tank 3. The output of the first check valve 71 is connected to the tank 3 via a first electro proportional relief valve 51. The port C of the first tested balance valve 111 is connected with the oil tank 3 through the third electric proportional relief valve 53 and the oil return filter 4.
The reverse hydraulic test circuit comprises a second hydraulic pump 22 connected with the oil tank 3, and the second hydraulic pump 22 is respectively connected with a second accumulator 82 and a second electromagnetic valve 62 through a second check valve 72; the second solenoid valve 62 is also connected to the port C of the second balanced valve 112 under test and the tank 3. The port B of the first test balance valve 111 is connected to the port B of the second test balance valve 112 and then to the inlet of the third electric proportional relief valve 53. The port C of the first tested balance valve 111 is also connected with the oil tank 3; the port a of the second balancing valve under test 112 is connected to the tank 3. The output of the second non-return valve 72 is connected to the tank 3 via a second electro proportional relief valve 52. A filter 4 is installed at the inlet of the tank 3, and can filter the hydraulic oil flowing back to the tank from each element.
The first pressure sensor 91 is installed on a line between the first accumulator 81 and the first solenoid valve 61, the second pressure sensor 92 is installed on a line between the second accumulator 82 and the second solenoid valve 62, the third pressure sensor 93 is installed on a line between the first solenoid valve 61 and the port a of the first balanced valve under test 111, the fourth pressure sensor 94 is installed on a line between the port B of the first balanced valve under test 111, the port B of the second balanced valve under test 112 and the inlet of the electro proportional relief valve 53, the fifth pressure sensor 95 is installed on a line between the second solenoid valve 62 and the port C of the second balanced valve under test 112, and the sixth pressure sensor 96 is installed on a line between the port a of the second balanced valve under test 112 and the tank 3.
The input end of the controller 12 is respectively connected with each pressure sensor, receives the pressure value monitored by each pressure sensor, monitors the state of the test bed and outputs corresponding control signals according to certain logic; the output end of the controller 12 is electrically connected with the first hydraulic pump 21, the second hydraulic pump 22, the first electromagnetic valve 61 and the second electromagnetic valve 62, the controller 12 compares the pressure value monitored by the pressure sensor with a preset threshold value, and outputs different control signals according to the comparison result, so as to control the first hydraulic pump 21, the second hydraulic pump 22, the first electromagnetic valve 61 and the second electromagnetic valve 62 to operate. The output end of the controller 12 is also electrically connected with the first electric proportional overflow valve 51 and the second electric proportional overflow valve 52, so that the actions of the first electric proportional overflow valve and the second electric proportional overflow valve can be controlled. The output of the controller 12 is electrically connected to a third electro proportional relief valve 53.
When the first tested balance valve 111 performs a one-way durability test, the first hydraulic pump 21, the first accumulator 81, the first electromagnetic valve 61, the controller 12, the first pressure sensor 91, the third pressure sensor 93, the fourth pressure sensor 94 and other elements are mainly used for controlling, when the first pressure sensor 91 detects that the accumulator pressure is within a set threshold range, the tested balance valve one-way durability test is realized through reversing of the first electromagnetic valve 61, when the first pressure sensor 91 detects that the accumulator pressure is lower than the minimum value of the set threshold, the controller 12 receives a signal of the first pressure sensor 91 to press the first accumulator 81, when the pressure of the first pressure sensor 91 reaches the maximum value of the set threshold, the pump stops filling the system, and the first one-way valve 71 performs a one-way locking function in the filling process.
When the second tested balance valve 112 performs the reverse control function test, the second hydraulic pump 22, the second accumulator 82, the second electromagnetic valve 62, the controller 12, the second pressure sensor 92, the fourth pressure sensor 94, the fifth pressure sensor 95 and other elements are mainly used for controlling, when the pressures detected by the second pressure sensor 92 and the fourth pressure sensor 94 are all within the set threshold range, the reverse control function test of the tested balance valve is realized through reversing the second electromagnetic valve 62, when the pressure detected by the second pressure sensor 92 is lower than the minimum value of the set threshold, the controller 12 receives the signal of the pressure sensor 9.2 to control the second hydraulic pump 22 to punch the second accumulator 82, and when the pressure of the second pressure sensor 92 reaches the maximum value of the set threshold, the pump stops filling the system, and the second check valve 72 performs the one-way locking function in the filling process.
The first tested balance valve 111 and the second tested balance valve 112 in the hydraulic circuit can meet the durability test of multiple groups of elements in a parallel mode, and are not limited to three pieces in each group in the principle.
The invention also comprises a hydraulic valve durability test method, which is applied to a hydraulic circuit of the hydraulic valve durability test and relates to the functions of automatically counting test times, automatically detecting failure of a tested piece and self-diagnosing, and specifically comprises the following steps:
the hydraulic valve durability test hydraulic circuit is tested by automatically counting the test times, and the following steps are adopted:
s1: the controller 12 receives the pressure values detected by the first pressure sensor 91, the second pressure sensor 92, and the fourth pressure sensor 94;
s2: the controller 12 compares the pressure value detected by the fourth pressure sensor 94 with its maximum set value, and controls the first solenoid valve 61 to be deenergized or the second solenoid valve 62 to be deenergized according to the comparison result;
s3: durability test count statistical method for the first tested balance valve 111: after the first electromagnetic valve 61 is powered off, judging whether the pressure value detected by the first pressure sensor 91 is in a range interval between a maximum set value and a minimum set value, if so, controlling the first electromagnetic valve 61 to be powered on by the controller 12, and starting cycle counting by the controller, wherein the reversing times of the first electromagnetic valve 61 are used as the test times of the unidirectional function; the number of times of commutation of the first solenoid valve 61 is taken as the number of times of test of the one-way function; when the pressure value detected by the fourth pressure sensor 94 is smaller than the set minimum value, the test stand performs the durability test of the first tested balance valve 111 and counts until the test is ended when the number of tests reaches the design value;
s4: durability test count statistical method for the second tested balance valve 112: after the second electromagnetic valve 62 is powered off, judging whether the pressure value detected by the second pressure sensor 92 is within a range between a maximum set value and a minimum set value, if so, controlling the second electromagnetic valve 62 to be powered on by the controller 12, and starting cycle counting by the controller, wherein the reversing times of the second electromagnetic valve 62 are used as the test times of the reverse control function; when the pressure value detected by the fourth pressure sensor 94 is greater than the set minimum value, the test stand performs the durability test of the second balanced valve 112 to be tested and counts until the test is ended when the number of tests reaches the design value.
In step S3 and step S4, if the number of tests does not reach the set value, the controller 12 determines whether the pressure value detected by the fourth pressure sensor 94 is smaller than the minimum set value; if yes, the controller 12 controls the first electromagnetic valve 61 to lose electricity; if not, the controller 12 controls the second solenoid valve 62 to be de-energized.
The hydraulic valve durability test method further includes an automatic charging function of the first accumulator 81 and the second accumulator 82, specifically as follows:
automatic charging function of the first accumulator 81: when the controller 12 receives that the pressure value of the first pressure sensor 91 is lower than the set minimum value, the controller 12 outputs a control signal to start the first hydraulic pump 21 to charge the first accumulator 81 until the controller 12 outputs a control signal to stop the first hydraulic pump 21 when detecting that the pressure value of the first pressure sensor 91 reaches the set maximum value;
A method for automatically detecting failure of a test piece when performing a durability test, comprising the steps of:
when the first solenoid valve 61 is deenergized during the one-way function durability test of the first tested balance valve 111, if the pressure detected by the fourth pressure sensor 94 cannot keep the pressure value of the sensor before the first solenoid valve 61 is deenergized, the one-way function failure of the first tested balance valve 111 is indicated, at the moment, a prompt alarm is carried out, the test piece fails, and the durability test is automatically stopped.
When the pressure value detected by the fourth pressure sensor 94 cannot be decompressed along with the power supply of the second electromagnetic valve 62 and the pressure of the fifth pressure sensor 95 is normal in the durability test of the reverse control function of the second tested balance valve 112, the reverse control function of the balance valve is prompted to fail, and the durability test is automatically stopped; or when the first tested balance valve 111 is tested in one way, the third pressure sensor 93 and the fourth pressure sensor 94 can build pressure normally when the first electromagnetic valve 61 is powered on, and the fourth pressure sensor 94 is instantly powered off after the second electromagnetic valve 62 is powered off, so that the second tested balance valve 112 is considered to be invalid, and the durability test is automatically stopped.
When the hydraulic circuit is used for the self-diagnosis test of the hydraulic circuit by utilizing the hydraulic valve durability test, the hydraulic circuit comprises the following components:
the pressure value detected by the third pressure sensor 93 is frequently built and decompressed along with the power failure of the first electromagnetic valve 61, and the first electromagnetic valve 61 is indicated to be failed when the pressure release of the third pressure sensor 93 is detected in the test process or when the pressure of the third pressure sensor 93 cannot be normally built when the first electromagnetic valve 61 is powered on;
the pressure value detected by the fifth pressure sensor 95 is frequently built and decompressed along with the power failure of the second electromagnetic valve 62, and the fault of the second electromagnetic valve 62 is indicated when the fact that the fifth pressure sensor 95 cannot decompress or the fifth pressure sensor 95 cannot build the pressure normally when the first electromagnetic valve 62 is powered on is detected in the test process;
in the test process, the first accumulator 81 is filled with liquid, and when the first pressure sensor 91 is detected to be unable to build pressure normally, the test bed prompts the first electric proportional relief valve 51 or the oil pump 21 to fail;
during the test, the second accumulator 82 is charged, and when the second pressure sensor 92 is detected to be unable to build up pressure normally, the test stand prompts the second electric proportional relief valve 52 or the oil pump 22 to fail.
Claims (10)
1. A hydraulic valve durability test hydraulic circuit comprises a plurality of hydraulic test circuit groups and a plurality of tested balance valves connected with the hydraulic test circuit groups; each hydraulic test circuit group comprises a pair of opposite forward hydraulic test circuits and reverse hydraulic test circuits;
the positive hydraulic test loop comprises a first hydraulic pump (21) connected with the oil tank (3), and the first hydraulic pump (21) is respectively connected with a first energy accumulator (81) and a first electromagnetic valve (61) through a first check valve (71); the first electromagnetic valve (61) is also connected with a port A of the first tested balance valve (111) and the oil tank (3);
the reverse hydraulic test loop comprises a second hydraulic pump (22) connected with the oil tank (3), and the second hydraulic pump (22) is respectively connected with a second energy accumulator (82) and a second electromagnetic valve (62) through a second check valve (72); the second electromagnetic valve (62) is also connected with a port C of a second tested balance valve (112) and the oil tank (3);
the port B of the first tested balance valve (111) is connected with the port B of the second tested balance valve (112); the port C of the first tested balance valve (111) is connected with the oil tank (3); the port A of the second tested balance valve (112) is connected with the oil tank (3); the method is characterized in that:
a first pressure sensor (91) is arranged on a pipeline between the first energy accumulator (81) and the first electromagnetic valve (61);
a second pressure sensor (92) is arranged on a pipeline between the second energy accumulator (82) and the second electromagnetic valve (62);
a third pressure sensor (93) is arranged on a pipeline between the first electromagnetic valve (61) and the port A of the first tested balance valve (111);
a fourth pressure sensor (94) is arranged on a pipeline between the port B of the first tested balance valve (111) and the port B of the second tested balance valve (112);
a fifth pressure sensor (95) is arranged on a pipeline between the second electromagnetic valve (62) and a port C of the second tested balance valve (112);
a sixth pressure sensor (96) is arranged on a pipeline between the port C of the first tested balance valve (111), the port A of the second tested balance valve (112) and the oil tank (3);
the intelligent control system further comprises a controller (12), wherein the input end of the controller (12) is electrically connected with each pressure sensor respectively and receives the pressure value monitored by each pressure sensor; the output end of the controller (12) is electrically connected with the first hydraulic pump (21), the second hydraulic pump (22), the first electromagnetic valve (61) and the second electromagnetic valve (62), the controller (12) compares the pressure value monitored by the pressure sensor with a preset threshold value, and different control signals are output according to the comparison result, so that the first hydraulic pump (21), the second hydraulic pump (22), the first electromagnetic valve (61) and the second electromagnetic valve (62) are controlled to act.
2. The hydraulic valve durability test hydraulic circuit according to claim 1, wherein: the output end of the first one-way valve (71) is connected with the oil tank (3) through a first electric proportional overflow valve (51), and the output end of the second one-way valve (72) is connected with the oil tank (3) through a second electric proportional overflow valve (52); the output end of the controller (12) is electrically connected with the first electric proportional overflow valve (51) and the second electric proportional overflow valve (52), and the controller (12) outputs control currents of the first electric proportional overflow valve (51) and the second electric proportional overflow valve (52).
3. The hydraulic valve durability test hydraulic circuit according to claim 1, wherein: the port C of the first tested balance valve (111) is connected with the oil tank (3) through a third electric proportional overflow valve (53); the output end of the controller (12) is electrically connected with the third electric proportional overflow valve (53), and the controller (12) outputs control current of the third electric proportional overflow valve (53).
4. The hydraulic valve durability test hydraulic circuit according to claim 1, wherein: an oil return filter (4) is arranged at the inlet of the oil tank (3).
5. A durability test method for a hydraulic valve is characterized by comprising the following steps of: the test method is applied to the hydraulic valve durability test hydraulic circuit of claim 1.
6. The hydraulic valve durability test method according to claim 5, wherein the hydraulic valve durability test hydraulic circuit is subjected to an automatic statistical test of the number of tests by:
s1: the controller (12) receives pressure values detected by the first pressure sensor (91), the second pressure sensor (92) and the fourth pressure sensor (94);
s2: the controller (12) compares the pressure value detected by the fourth pressure sensor (94) with the maximum set value thereof, and controls the first electromagnetic valve (61) to lose power or the second electromagnetic valve (62) to lose power according to the comparison result;
s3: the durability test count statistical method of the first tested balance valve (111): after the first electromagnetic valve (61) is powered off, judging whether the pressure value detected by the first pressure sensor (91) is in a range interval of a maximum set value and a minimum set value, if so, controlling the first electromagnetic valve (61) to be powered on by the controller (12), and starting cycle counting by the controller, wherein the reversing times of the first electromagnetic valve (61) are used as the test times of the unidirectional function; when the pressure value detected by the fourth pressure sensor (94) is smaller than the set minimum value, the test bed performs a durability test of the first tested balance valve (111) and counts until the test times reach the design value;
s4: durability test count statistical method for the second tested balance valve (112): after the second electromagnetic valve (62) is powered off, judging whether the pressure value detected by the second pressure sensor (92) is in a range interval between a maximum set value and a minimum set value, if so, controlling the second electromagnetic valve (62) to be powered on by the controller (12), and starting cycle counting by the controller, wherein the reversing times of the second electromagnetic valve (62) are used as the test times of a reverse control function; when the pressure value detected by the fourth pressure sensor (94) is larger than the set minimum value, the test stand performs the durability test of the second tested balance valve (112) and counts until the test times reach the design value, and the test is ended.
7. The hydraulic valve durability test method according to claim 5 wherein: the method comprises an automatic charging function of a first accumulator (81) and a second accumulator (82);
automatic charging function of the first accumulator (81): when the controller (12) receives that the pressure value of the first pressure sensor (91) is lower than a set minimum value, the controller (12) outputs a control signal in a valve control way to start the first hydraulic pump (21) to charge the first energy accumulator (81) until the pressure value of the first pressure sensor (91) is detected to reach the set maximum value, the charging is finished, and the controller (12) outputs a control signal to stop the first hydraulic pump (21);
automatic charging function of the second accumulator (82): when the controller (12) receives that the pressure value of the second pressure sensor (92) is lower than a set minimum value, the controller (12) outputs a control signal in a valve control mode to start the second hydraulic pump (22) to charge the second energy accumulator (82) until the fact that the pressure value of the second sensor (92) reaches the set maximum value is detected, the charging is finished, and the controller (12) outputs a control signal to enable the second hydraulic pump (22) to stop acting.
8. The method of claim 5, wherein the method of automatically detecting failure of the test piece when performing the durability test comprises the steps of:
when the first tested balance valve (111) is subjected to the unidirectional function durability test, when the first electromagnetic valve (61) is in power failure, if the pressure detected by the fourth pressure sensor (94) cannot keep the pressure value of the sensor before the first electromagnetic valve (61) is in power failure, the unidirectional function failure of the first tested balance valve (111) is indicated, at the moment, a prompt alarm is carried out, the test piece is failed, and the durability test is automatically stopped.
9. The method according to claim 5, wherein the performing of the durability test for automatically detecting the failure of the test piece by using the hydraulic valve durability test hydraulic circuit comprises:
when the second tested balance valve (112) is subjected to a reverse control function durability test, when the pressure value detected by the fourth pressure sensor (94) is not decompressed along with the power supply of the second electromagnetic valve (62) and the pressure of the fifth pressure sensor (95) is normal, the reverse control function of the balance valve is prompted to fail, and the durability test is automatically stopped; or when the first tested balance valve (111) is subjected to one-way test, the third pressure sensor (93) and the fourth pressure sensor (94) can normally build pressure when the first electromagnetic valve (61) is powered on, the fourth pressure sensor (94) is instantly subjected to pressure loss after the second electromagnetic valve (62) is powered off, the second tested balance valve (112) is considered to be invalid, and the durability test is automatically stopped.
10. The method according to claim 5, wherein the self-diagnosis test of the hydraulic circuit is performed by:
the pressure value detected by the third pressure sensor (93) is frequently built and decompressed along with the power failure of the first electromagnetic valve (61), and the first electromagnetic valve (61) is indicated to be failed when the fact that the third pressure sensor (93) cannot decompress or the third pressure sensor (93) cannot build pressure normally when the first electromagnetic valve (61) is powered on is detected in the test process;
the pressure value detected by the fifth pressure sensor (95) is frequently built and decompressed along with the power failure of the second electromagnetic valve (62), and the fault of the second electromagnetic valve (62) is indicated when the fact that the fifth pressure sensor (95) cannot decompress or the fifth pressure sensor (95) cannot build pressure normally when the first electromagnetic valve (62) is powered on is detected in the test process;
in the test process, the first energy accumulator (81) is filled with liquid, and when the fact that the first pressure sensor (91) cannot build pressure normally is detected, the test bed prompts the first electric proportional overflow valve (51) or the oil pump (21) to fail;
and in the test process, the second energy accumulator (82) is filled with liquid, and when the fact that the second pressure sensor (92) cannot build pressure normally is detected, the test bed prompts the second electric proportional relief valve (52) or the oil pump (22) to fail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310340928.3A CN116336038A (en) | 2023-03-31 | 2023-03-31 | Hydraulic valve durability test hydraulic circuit and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310340928.3A CN116336038A (en) | 2023-03-31 | 2023-03-31 | Hydraulic valve durability test hydraulic circuit and test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116336038A true CN116336038A (en) | 2023-06-27 |
Family
ID=86882177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310340928.3A Pending CN116336038A (en) | 2023-03-31 | 2023-03-31 | Hydraulic valve durability test hydraulic circuit and test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116336038A (en) |
-
2023
- 2023-03-31 CN CN202310340928.3A patent/CN116336038A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113036186A (en) | Fuel cell system and fault detection method and device for cylinder valve of hydrogen system of fuel cell system | |
| CN220470179U (en) | Detection device for fluid pump device | |
| CN104118420A (en) | Fault diagnosis method for blade electric vehicle vacuum assistance brake system | |
| CN108966665A (en) | The hydraulic control system of Work machine | |
| EP3030877A1 (en) | Method for detecting a burst hose in a hydraulic system | |
| CN116336038A (en) | Hydraulic valve durability test hydraulic circuit and test method | |
| CN111071286B (en) | Micro-rail vehicle and braking system and braking method thereof | |
| CN205533544U (en) | Take fault self diagnosis's pneumatic cylinder position to follow system | |
| CN214164967U (en) | Compressed air's control system and new energy automobile | |
| US20110072821A1 (en) | Control Device and Method for a Quick-Acting Gate Valve of a Steam Turbine | |
| CN108873755A (en) | Anti-sticking system and anti-card test method for lifting device | |
| CN102493916A (en) | Off-course hydraulic braking device of wind generating set | |
| CN217873906U (en) | Electric control brake system and operation machine | |
| CN202441539U (en) | Yaw hydraulic braking device of wind generating set | |
| CN215058070U (en) | Axial plunger pump test prototype of multisensor integration installation | |
| CN110439695B (en) | Engineering vehicle engine overspeed protection control system and control method thereof | |
| CN113482897B (en) | Oil pump control device and method for speed regulator hydraulic system of giant hydroelectric generating set | |
| CN216975110U (en) | Oil pump control system of speed regulator of water turbine | |
| CN210240186U (en) | Durability test system for hydraulic pump and motor | |
| CN107795529B (en) | Electro-hydraulic actuator and method for detecting safety function of electro-hydraulic actuator | |
| CN219139327U (en) | Plunger pump efficiency testing device | |
| KR101451110B1 (en) | Diagnosis unit of oil pressure equipment for test unit for construction machine | |
| CN112550260A (en) | Control method and system for compressed air and new energy automobile | |
| CN215805447U (en) | Hydraulic circuit for durability test of balance valve | |
| CN214894053U (en) | Jack test system |
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 |