CN110953208A - Hydraulic valve fatigue testing method and hydraulic valve fatigue testing device - Google Patents
Hydraulic valve fatigue testing method and hydraulic valve fatigue testing device Download PDFInfo
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- CN110953208A CN110953208A CN201911383021.5A CN201911383021A CN110953208A CN 110953208 A CN110953208 A CN 110953208A CN 201911383021 A CN201911383021 A CN 201911383021A CN 110953208 A CN110953208 A CN 110953208A
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- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- 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
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- General Engineering & Computer Science (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the technical field of hydraulic valve fatigue testing, in particular to a hydraulic valve fatigue testing method and a hydraulic valve fatigue testing device. The hydraulic valve fatigue testing method comprises the following steps: connecting the tested valve between the liquid inlet pipeline and the liquid return pipeline; a predetermined flow rate of liquid is supplied to the valve under test at a predetermined frequency. The hydraulic valve testing method provided by the invention adopts a flow pulse mode to test the tested valve, can better simulate the actual working environment of the valve, enables the state of the valve in the experiment to be more fit with the state of the valve in the actual working, and thus can ensure that the fatigue testing accuracy of the valve is high.
Description
Technical Field
The invention relates to the technical field of hydraulic valve fatigue testing, in particular to a hydraulic valve fatigue testing method and a hydraulic valve fatigue testing device.
Background
The hydraulic valve is a device for controlling the flow direction of oil in a hydraulic system, adjusting the pressure of the oil or adjusting the flow rate of the oil, and the like, and the valve body of the hydraulic valve continuously reciprocates under the action of a spring and the oil pressure, so the fatigue life of the hydraulic valve is very important, and the fatigue test of the hydraulic valve is used for testing the fatigue life of the hydraulic valve.
At present, the fatigue test of the hydraulic valve generally adopted is carried out through pressure pulse, and the problem exists that the state of the hydraulic valve during the pressure pulse test is different from the state of the hydraulic valve in practical application, so that the pressure pulse test cannot well simulate the actual running state of the hydraulic valve, and the accuracy of the test result is poor.
Disclosure of Invention
The invention aims to provide a hydraulic valve fatigue testing method and hydraulic valve fatigue, and aims to solve the technical problem that the accuracy of a test result is poor due to the fact that a pressure pulse test in the prior art cannot well simulate the actual running state of a hydraulic valve.
The invention provides a hydraulic valve fatigue testing method, which comprises the following steps:
connecting the tested valve between the liquid inlet pipeline and the liquid return pipeline;
a predetermined flow rate of liquid is supplied to the valve under test at a predetermined frequency.
Further, the supplying a liquid with a preset flow rate to the tested valve at a preset frequency specifically comprises:
the liquid with the preset flow is supplied into the liquid inlet pipeline all the time;
and shunting the liquid in the liquid inlet pipeline at the preset frequency.
The invention also provides a hydraulic valve fatigue testing device, comprising: the liquid storage tank, the liquid inlet pipeline, the liquid return pipeline and the flow regulating piece are arranged on the liquid storage tank; one end of the liquid inlet pipeline is communicated with an outlet of the liquid storage tank, the other end of the liquid inlet pipeline is used for being communicated with an inlet of a tested valve, one end of the liquid return pipeline is communicated with the inlet of the liquid storage tank, and the other end of the liquid return pipeline is used for being communicated with an outlet of the tested valve; the flow regulating member reduces a preset flow rate of the liquid in the liquid inlet pipeline at a preset frequency to form a flow rate pulse.
Further, the hydraulic valve fatigue testing device comprises a controller, a flow measuring piece and a pressure measuring piece; the flow measuring part and the pressure measuring part are both arranged at the tail end of the liquid inlet pipeline; the flow regulating piece, the flow measuring piece and the pressure measuring piece are all in communication connection with the controller.
Further, the import of adjusting the piece with the feed liquor pipeline intercommunication, the export of adjusting the piece with the liquid reserve tank intercommunication.
Further, the flow regulating part is an electromagnetic valve in communication connection with the controller, or the flow regulating part is an electric rotary valve in communication connection with the controller.
Further, the flow regulating part comprises an electromagnetic valve and the electric rotary valve, and the electromagnetic valve and the electric rotary valve are arranged in parallel.
Further, hydrovalve fatigue test device still includes heater and first temperature measurement spare, the heater sets up on the liquid reserve tank, first temperature measurement spare sets up in order to measure on the liquid reserve tank the liquid temperature in the liquid reserve tank, the heater with first temperature measurement spare all with the controller communication is connected.
Further, hydrovalve fatigue test device still include with the second temperature measurement spare that the controller communication is connected, the setting of second temperature measurement spare is in the end of feed liquor pipeline, in order to measure liquid temperature in the feed liquor pipeline.
Further, hydrovalve fatigue test device still includes cooling pipe, cooling circulating pump and radiator, the one end of cooling pipe with the cooling export intercommunication of liquid reserve tank, the other end with the cooling import intercommunication of liquid reserve tank, the cooling circulating pump with the radiator is established ties and is set up on the cooling pipe.
The invention provides a hydraulic valve fatigue testing method, which comprises the following steps: connecting the tested valve between the liquid inlet pipeline and the liquid return pipeline; a predetermined flow rate of liquid is supplied to the valve under test at a predetermined frequency. The liquid inlet pipeline and the liquid return pipeline form a liquid loop for testing the tested valve, the tested valve is connected between the liquid inlet pipeline and the liquid return pipeline in series, then liquid with preset flow is supplied to the tested valve at preset frequency, the tested valve is opened through the liquid with preset flow, the fluid with preset flow at preset frequency forms flow pulse, the tested valve is repeatedly opened and closed, and therefore fatigue testing of the tested valve is achieved. The hydraulic valve testing method provided by the invention adopts a flow pulse mode to test the tested valve, can better simulate the actual working environment of the valve, enables the state of the valve in the experiment to be more fit with the state of the valve in the actual working, and thus can ensure that the fatigue testing accuracy of the valve is high.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a hydraulic valve fatigue testing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a hydraulic valve fatigue testing apparatus according to yet another embodiment of the present invention;
FIG. 3 is a schematic diagram of a hydraulic valve fatigue testing arrangement according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a hydraulic valve fatigue testing apparatus according to still another embodiment of the present invention.
In the figure: 1-a liquid storage tank; 2-a liquid inlet pipeline; 3-a liquid return pipeline; 4-flow regulating parts; 5-a valve under test; 6-liquid inlet pump; 7-liquid inlet filter; 8-a flow measurement; 9-a pressure measuring member; 10-a first inlet valve; 11-a second inlet valve; 13-a third inlet valve; 14-a flow regulating valve; 15-an outlet valve; 16-a liquid level sensor; 17-a heater; 18-a first temperature measuring member; 19-a second temperature measuring member; 20-cooling a pipeline; 21-a cooling circulating pump; 22-a heat sink; 23-cooling the filter; 24-a cooling valve; 41-electromagnetic valve; 42-electric rotary valve.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The first embodiment is as follows:
the invention provides a hydraulic valve fatigue testing method, which comprises the following steps:
connecting the tested valve between the liquid inlet pipeline and the liquid return pipeline;
a predetermined flow rate of liquid is supplied to the valve under test at a predetermined frequency.
In this embodiment, the liquid inlet pipeline and the liquid return pipeline form a liquid loop for testing the tested valve, the tested valve is connected in series between the liquid inlet pipeline and the liquid return pipeline, then liquid with a preset flow rate is supplied to the tested valve at a preset frequency, the tested valve is opened through the liquid with the preset flow rate, and the fluid with the preset flow rate at the preset frequency forms a flow pulse, so that the tested valve is repeatedly opened and closed, and thus, the fatigue test of the tested valve is realized. The hydraulic valve testing method provided by the embodiment adopts a flow pulse mode to test the tested valve, so that the actual working environment of the valve can be better simulated, the state of the valve in the experiment is more fit with the state of the valve in the actual working, and the fatigue testing accuracy of the valve can be high.
Wherein, the fatigue test is carried out on the tested valve, which can be that liquid with preset flow is supplied at preset frequency until the valve is damaged, thereby obtaining the service life of the valve; or, the testing frequency is set, and if the tested valve is still intact after the set testing frequency is finished, the valve can meet the use requirement, and the test can be stopped.
It should be noted that the preset frequency and the preset flow rate can be changed and can be set according to the needs.
There are various ways to achieve the feeding of the liquid at the preset flow rate to the tested valve at the preset frequency, such as: the liquid inlet pipeline is provided with a valve, the valve is connected with the tested valve in series, the opening and the closing of the liquid inlet pipeline are realized through the opening and the closing of the valve, so that the liquid with preset flow is supplied to the tested valve discontinuously, namely, the flow pulse is realized, and the opening state and the closing state of the valve are converted at preset frequency, so that the liquid with the preset flow is supplied to the tested valve at the preset frequency; or the flow rate of the liquid supplied to the valve to be tested is adjusted by changing the opening degree of the valve, when the valve is completely opened, the flow rate of the liquid supplied to the valve to be tested is a preset flow rate, and when the opening degree of the valve is reduced, the flow rate of the liquid supplied to the valve to be tested is smaller than the preset flow rate.
As an alternative, the supplying the liquid to the tested valve at the preset frequency with the preset flow rate specifically comprises:
the liquid with the preset flow is supplied into the liquid inlet pipeline all the time;
and shunting the liquid in the liquid inlet pipeline at the preset frequency.
In this embodiment, the liquid is split at a preset frequency, that is, the splitting and non-splitting of the liquid in the liquid inlet pipeline alternately occur, when the liquid in the liquid inlet pipeline is not split, the liquid in the liquid inlet pipeline is sent to the valve to be tested at a preset flow rate, and when the liquid in the liquid inlet pipeline is split, the liquid is sent to the valve to be tested at the preset flow rate discontinuously. The mode avoids directly cutting off the liquid with the preset flow, only the flow is controlled, the flow of the flow is smaller than the preset flow, and the pressure of the liquid is smaller than the pressure of the liquid with the preset flow, so that the control process is easier to realize and control.
Example two:
the embodiment provides a device capable of realizing the fatigue testing method of the hydraulic valve.
As shown in fig. 1, the invention provides a fatigue testing device for a hydraulic valve, which comprises a liquid storage tank, a liquid inlet pipeline 2, a liquid return pipeline 3 and a flow regulating piece 4; one end of the liquid inlet pipeline 2 is communicated with an outlet of the liquid storage tank 1, the other end of the liquid inlet pipeline is used for being communicated with an inlet of the tested valve 5, one end of the liquid return pipeline 3 is communicated with the inlet of the liquid storage tank, and the other end of the liquid return pipeline 3 is used for being communicated with an outlet of the tested valve 5; the flow regulating member 4 is connected to the liquid inlet pipe 2, and the flow regulating member 4 reduces a preset flow rate of the liquid in the liquid inlet pipe 2 at a preset frequency to form a flow rate pulse.
Wherein, liquid reserve tank 1 is used for storing the liquid of being tested valve 5 and carrying out the test, and in liquid inflow inlet channel 2 of liquid reserve tank 1, reach the condition of opening being tested valve 5 after, will be tested valve 5 and open, then flow into back liquid pipeline 3 again, finally flow back to in the liquid reserve tank 1, avoid setting up storage device alone and collect the liquid of backward flow.
In this embodiment, when the life of the valve 5 to be tested at the preset flow rate needs to be tested, the liquid storage tank 1 supplies liquid at the preset flow rate to the liquid inlet pipeline 2, and the liquid at the preset flow rate flows to the valve 5 to be tested through the liquid inlet pipeline 2 to open the valve 5 to be tested; come to adjust the predetermined flow of the interior liquid of inlet channel 2 to being surveyed the valve 5 and carrying through the flow regulating valve, make the flow of the interior liquid of inlet channel 2 be less than predetermined flow, at this moment, be surveyed valve 5 and close, flow regulating 4 is with the work of frequency of predetermineeing to realize flow pulse, make the liquid of predetermineeing the flow open by survey valve 5 with predetermined frequency, the action of being repeatedly opened and closing by survey valve 5, thereby can accomplish fatigue test. The hydrovalve testing arrangement that this embodiment provided adopts the mode of flow pulse to test by test valve 5, can simulate the actual operational environment of valve better, makes the state of valve in the experiment laminate the state of valve in actual work more to can make the fatigue test accuracy height to the valve.
Specifically, a liquid inlet pump 6 may be disposed on the liquid inlet pipe 2, and the liquid inlet pump 6 pumps the liquid in the liquid storage tank 1 into the liquid inlet pipe 2. Optionally, the liquid inlet pump 6 adopts a variable frequency pump, and liquid with different flow rates is pumped into the liquid inlet pipe by changing the frequency of the pump, so that fatigue tests of the same hydraulic valve under different preset flow rate conditions can be realized; or, in the same experiment, the fatigue test of the tested valve 5 under the combined action of different preset flows is realized, namely, the complicated working environment with variable liquid flow is simulated; the preset flow can be adjusted according to the hydraulic valves of different specifications, so that the hydraulic pumps of various specifications can be tested.
The working flow of the variable-frequency liquid inlet pump 6 can be 0-300L/min, the working temperature is 15-120 ℃, the system pressure is 0-2.5 Mpa, and the frequency is 0-100 Hz.
Can also set up feed liquor filter 7 on inlet channel 2, avoid impurity in the liquid reserve tank 1 to get into by measuring valve 5, avoid impurity to cause the influence to the life-span of being measured valve 5 to further improve the degree of accuracy of test.
As shown in fig. 2, on the basis of the above embodiment, further, the hydraulic valve fatigue testing device includes a controller, a flow measuring element 8 (such as a flow meter or a flow sensor, etc.) and a pressure measuring element 9 (such as a pressure gauge or a pressure sensor, etc.); the flow measuring piece 8 and the pressure measuring piece 9 are both arranged at the tail end of the liquid inlet pipeline 2; the flow regulating part 4, the flow measuring part 8 and the pressure measuring part 9 are all in communication connection with the controller.
In this embodiment, a flow measuring component 8 and a pressure measuring component 9 are disposed at the end of the liquid inlet pipe 2 (i.e. the end of the liquid inlet pipe far away from the liquid storage tank 1, which can also be understood as the end of the liquid inlet pipe 2 close to the valve 5 to be measured), the flow measuring component 8 is used for measuring the flow of the liquid flowing into the valve 5 to be measured, and transmitting the measurement result to the controller, the controller can obtain the corresponding preset pressure under the preset flow condition by integration, obtain more complete experimental results, and obtain the pressure pulse according to the flow pulse.
The signal of the flow rate operating frequency (preset frequency) of the valve 5 to be measured can be used as the abscissa, and the signal of the flow rate magnitude of the valve 5 to be measured can be used as the ordinate, so that a graph of the flow rate operating frequency and the flow rate magnitude of the valve 5 to be measured can be generated.
The variable-frequency liquid inlet pump 6 is in communication connection with the controller, and the controller can control the liquid inlet pump 6 to change the frequency so as to change the flow of liquid pumped into the liquid inlet pipeline 2.
On the basis of the above embodiment, further, the flow regulating member 4 is implemented to reduce the preset flow rate of the liquid in the liquid inlet pipeline 2 at a preset frequency, and the manner of forming the flow rate pulse may be various, for example: the flow regulating part 4 is a quick switching valve such as an electric valve, the valve is arranged on the liquid inlet pipeline 2 and is connected with the tested valve 5 in series, the opening and closing of the liquid inlet pipeline are realized through the opening and closing of the valve, so that the liquid with the preset flow is supplied to the tested valve 5 discontinuously, namely, the flow pulse is realized, and the opening state and the closing state of the valve are switched at the preset frequency, so that the liquid with the preset flow is supplied to the tested valve 5 at the preset frequency; or the flow regulating member 4 is a regulating valve such as an electric regulating valve or an electromagnetic regulating valve, the flow rate of the liquid supplied to the valve 5 to be measured is regulated by changing the opening degree of the regulating valve, when the regulating valve is fully opened, the flow rate of the liquid supplied to the valve 5 to be measured is a preset flow rate, and when the opening degree of the regulating valve becomes smaller, the flow rate of the liquid supplied to the valve 5 to be measured is smaller than the preset flow rate.
As a preferred scheme, the inlet of the flow regulating piece 4 is communicated with the liquid inlet pipeline 2, and the outlet of the flow regulating piece 4 is communicated with the liquid storage tank 1. In this embodiment, flow regulating part 4 and tested valve 5 are parallelly connected and set up for liquid to in the inlet channel 2 shunts, namely shunts to the liquid that flows to tested valve 5. The flow regulating part 4 works at a preset frequency, so that liquid in the liquid inlet pipeline 2 is divided at the preset frequency, namely, liquid division and non-division in the liquid inlet pipeline alternately occur, when the liquid in the liquid inlet pipeline is not divided, the liquid in the liquid inlet pipeline is sent to the tested valve 5 at a preset flow rate, and when the liquid in the liquid inlet pipeline is divided, the liquid is also discontinuously conveyed to the tested valve 5 at the preset flow rate. The mode avoids directly cutting off the liquid with the preset flow, only the flow is controlled, the flow of the flow is smaller than the preset flow, and the pressure of the liquid is smaller than the pressure of the liquid with the preset flow, so that the control process is easier to realize and control.
The structural form of the adjusting piece can be various, such as: the flow regulating part 4 is an electromagnetic valve 41 in communication connection with the controller, or the flow regulating part 4 is an electric rotary valve 42 in communication connection with the controller, in this embodiment, the electromagnetic valve 41 or the electric rotary valve 42 is adopted, so that the control is convenient. The frequency of the electromagnetic valve 41 can be 0-0.35 Hz, and the frequency of the electric rotary valve 42 can be 0-2 Hz.
For another example: the flow regulating member 4 includes a solenoid valve 41 and an electric rotary valve 42, and the solenoid valve 41 and the electric rotary valve 42 are arranged in parallel. In this embodiment, the electromagnetic valve 41 and the electric rotary valve 42 are both connected in parallel with the tested valve 5, and the electromagnetic valve 41 can be selected to work according to the implementation requirement, or the electric rotary valve 42 can work, or both the electromagnetic valve and the electric rotary valve 42 can work to implement more complex control.
The electromagnetic valve 41 or the electric rotary valve 42 is in communication connection with the controller, and the opening and closing of the electromagnetic valve 41 or the electric rotary valve 42 are controlled, so that automatic testing is realized.
Specifically, a valve may be provided on the liquid inlet pipe 2 to control whether the liquid in the liquid storage tank 1 flows into the liquid inlet pipe 2, and the liquid flow of the testing device may be controlled integrally, for example, a first inlet valve 10 is provided in front of a first filter (the side of the filter close to the liquid storage tank 1 is front), and a second inlet valve 11 is provided behind the first filter; a pressure measuring element 9, such as a pressure sensor, can also be arranged at the branching position of the inlet pipe 2; a flow regulating valve 14 can be arranged between the flow regulating part 4 and the liquid storage tank 1 so as to cut off or communicate a pipeline between the flow regulating part 4 and the liquid storage tank 1; a third inlet valve 13 may also be provided at the extreme end of the inlet conduit 2 (behind the temperature and pressure measuring means 9); still can set up outlet valve 15 on liquid return pipe 3 to open or close liquid return pipe 3, still can set up the bleeder valve on liquid reserve tank 1, thereby conveniently change the liquid in the liquid reserve tank 1. Still can set up level sensor 16 in liquid reserve tank 1 to detect the liquid level of the liquid in the liquid reserve tank 1, avoid the liquid volume in the liquid reserve tank 1 not enough and influence the test.
As shown in fig. 3, in addition to the above-mentioned embodiment, the fatigue testing device for the hydraulic valve further includes a heater 17 and a first temperature measuring device 18 (such as a thermometer or a temperature sensor), the heater 17 is disposed on the tank 1, the first temperature measuring device 18 is disposed on the tank to measure the temperature of the liquid in the tank 1, and both the heater 17 and the first temperature measuring device 18 are in communication with the controller.
In this embodiment, the controller controls the heater 17 to operate to heat the liquid in the liquid storage tank 1, so that the liquid in the liquid storage tank 1 reaches a set temperature, the valve to be tested is tested at a certain temperature, and the valve to be tested 5 can be subjected to fatigue tests at different temperatures. The first temperature sensor can measure the temperature of the liquid in the liquid storage tank 1, and send the measurement result to the controller, and when the current temperature of the liquid analyzed by the controller reaches the set temperature, the heater 17 is controlled to stop working.
As shown in fig. 3, in addition to the above-mentioned embodiment, the hydraulic valve testing device further includes a second temperature measuring device 19 connected to the controller in communication, and the second temperature measuring device 19 is disposed at the end of the liquid inlet pipe 2 to measure the temperature of the liquid in the liquid inlet pipe 2.
In this embodiment, set up second temperature measurement piece 19 at the end of inlet channel 2 to measure the temperature of the liquid of tested valve 5 entry end, thereby obtain the actual liquid temperature that gets into tested valve 5, avoid liquid to lead to influencing the test result at the heat dissipation cooling of flow process, thereby can obtain more real test result.
As shown in fig. 4, based on the above embodiment, further, the hydraulic valve testing apparatus further includes a cooling pipeline 20, a cooling circulation pump 21 and a radiator 22, one end of the cooling pipeline 20 is communicated with the cooling outlet of the liquid storage tank, the other end is communicated with the cooling inlet of the liquid storage tank, and the cooling circulation pump 21 and the radiator 22 are serially connected to the cooling pipeline 20.
In this embodiment, after testing tested valve 5 with a certain temperature, the liquid in the liquid reserve tank 1 has a certain temperature, and if want to test tested valve 5 with lower liquid temperature, it is slow to make the liquid natural cooling speed in the liquid reserve tank 1, set up the cooling pump with the interior liquid pump of liquid reserve tank 1 go into the cooling tube in, wait that cooling liquid through-flow is through radiator 22, radiator 22 treats that cooling liquid cools off, the liquid after the cooling flows back to liquid reserve tank 1 again, so circulate, until the temperature of the liquid in the liquid reserve tank 1 drops to the settlement temperature, cool off liquid through radiator 22, can improve the cooling rate and the efficiency of the liquid in the liquid reserve tank 1.
The heat sink 22 may be air-cooled, and has a simple structure and low cost, and other types of heat sinks 22 may be used.
Specifically, a cooling valve 24 and a cooling filter 23 can be arranged on the cooling pipeline, the cooling valve 24 and the cooling filter 23 are located on a pipe section between the radiator 22 and the liquid storage tank 1, the cooling valve 24 controls the outflow of liquid in the liquid storage tank 1, the cooling filter 23 can filter out impurities in the liquid, the service life of the radiator 22 is prevented from being influenced by the impurities, the liquid entering the liquid storage tank 1 again is cleaner, and the impurities are further prevented from entering the valve 5 to be tested when the liquid flows into the valve 5 to be tested.
On the basis of the above embodiment, further, the hydraulic fatigue testing device may further include a human-machine interface communicatively connected to the controller, and a person may input a command or input a test condition parameter through the human-machine interface, so that the controller controls each element to operate.
The use process of the hydraulic fatigue testing device provided by the invention is listed as follows:
the first inlet valve 10, the second inlet valve 11, the third inlet valve 13, the diverter valve and the outlet valve 15 are all open;
the pulse frequency is set according to the actual test requirement through a man-machine exchange interface, and the electromagnetic valve 41 or the electric rotary valve 42 is selected for control.
Setting an upper limit value and a lower limit value of flow according to actual test requirements through a man-machine exchange interface;
the frequency of the liquid inlet pump 6 is set through the man-machine exchange interface according to the actual test requirement, a relatively small frequency can be set randomly at first, and the frequency can be adjusted again after the test is started to achieve the flow value required by the test.
Before starting up, firstly, the liquid inlet pump 6 and the heating parts of the liquid storage tank 1 are opened (opened when the set temperature is met);
after starting up, the test is started, and the frequency of the liquid inlet pump 6 is adjusted to reach the required preset flow value;
the controller records and stores the flow pulse signal collected by the flow measuring part 8 and the pressure pulse signal collected by the pressure measuring part 9;
the number of flow pulses (the number of times of opening and closing the valve 5 to be tested) when the valve 5 to be tested is damaged is the number of fatigue lives of the valve (or the test is stopped after the valve 5 to be tested is opened and closed to a set number of times).
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Furthermore, those skilled in the art will appreciate that while some of the embodiments described above include some features included in other embodiments, rather than others, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, any of the claimed embodiments may be used in any combination. Additionally, the information disclosed in this background section is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (10)
1. A hydraulic valve fatigue test method is characterized by comprising the following steps:
connecting the tested valve between the liquid inlet pipeline and the liquid return pipeline;
a predetermined flow rate of liquid is supplied to the valve under test at a predetermined frequency.
2. The fatigue testing method for the hydraulic valve according to claim 1, wherein the supplying a preset flow of liquid to the tested valve at a preset frequency specifically comprises:
the liquid with the preset flow is supplied into the liquid inlet pipeline all the time;
and shunting the liquid in the liquid inlet pipeline at the preset frequency.
3. A hydraulic valve fatigue test device, characterized by includes: the liquid storage tank, the liquid inlet pipeline, the liquid return pipeline and the flow regulating piece are arranged on the liquid storage tank; one end of the liquid inlet pipeline is communicated with an outlet of the liquid storage tank, the other end of the liquid inlet pipeline is used for being communicated with an inlet of a tested valve, one end of the liquid return pipeline is communicated with the inlet of the liquid storage tank, and the other end of the liquid return pipeline is used for being communicated with an outlet of the tested valve; the flow regulating member reduces a preset flow rate of the liquid in the liquid inlet pipeline at a preset frequency to form a flow rate pulse.
4. The hydraulic valve fatigue testing arrangement of claim 3, comprising a controller, a flow measurement member and a pressure measurement member; the flow measuring part and the pressure measuring part are both arranged at the tail end of the liquid inlet pipeline; the flow regulating piece, the flow measuring piece and the pressure measuring piece are all in communication connection with the controller.
5. The hydraulic valve fatigue testing device of claim 4, wherein an inlet of the flow regulating member is in communication with the liquid inlet pipeline, and an outlet of the flow regulating member is in communication with the liquid storage tank.
6. The hydraulic valve fatigue testing device of claim 5, wherein the flow regulating member is a solenoid valve communicatively connected to the controller, or the flow regulating member is an electric rotary valve communicatively connected to the controller.
7. The hydraulic valve fatigue testing apparatus of claim 5, wherein the flow regulating member comprises a solenoid valve and an electric rotary valve, the solenoid valve and the electric rotary valve being arranged in parallel.
8. The hydraulic valve fatigue testing apparatus of any one of claims 4-7, further comprising a heater disposed on the reservoir and a first temperature measuring device disposed on the reservoir to measure a temperature of the fluid in the reservoir, the heater and the first temperature measuring device both being communicatively coupled to the controller.
9. The hydraulic valve fatigue testing apparatus of claim 8, further comprising a second temperature measuring device communicatively coupled to the controller, the second temperature measuring device being disposed at an end of the inlet conduit to measure a temperature of the liquid within the inlet conduit.
10. The hydraulic valve fatigue testing device of claim 8, further comprising a cooling pipeline, a cooling circulation pump and a radiator, wherein one end of the cooling pipeline is communicated with the cooling outlet of the liquid storage tank, the other end of the cooling pipeline is communicated with the cooling inlet of the liquid storage tank, and the cooling circulation pump and the radiator are arranged on the cooling pipeline in series.
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| CN201911383021.5A CN110953208A (en) | 2019-12-27 | 2019-12-27 | Hydraulic valve fatigue testing method and hydraulic valve fatigue testing device |
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| CN201911383021.5A CN110953208A (en) | 2019-12-27 | 2019-12-27 | Hydraulic valve fatigue testing method and hydraulic valve fatigue testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112945598A (en) * | 2021-02-02 | 2021-06-11 | 中国家用电器研究院 | Device, method and equipment for testing service life of waste food processor |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112945598A (en) * | 2021-02-02 | 2021-06-11 | 中国家用电器研究院 | Device, method and equipment for testing service life of waste food processor |
| CN112945598B (en) * | 2021-02-02 | 2022-12-06 | 中国家用电器研究院 | Device, method and equipment for testing service life of waste food processor |
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