CN110131242B - Half-speed machine CVS valve testing device and testing method - Google Patents
Half-speed machine CVS valve testing device and testing method Download PDFInfo
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- CN110131242B CN110131242B CN201910522548.5A CN201910522548A CN110131242B CN 110131242 B CN110131242 B CN 110131242B CN 201910522548 A CN201910522548 A CN 201910522548A CN 110131242 B CN110131242 B CN 110131242B
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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
Abstract
The invention relates to a device and a method for testing a CVS valve of a half-speed machine, which comprises the following steps: the hydraulic power unit is used for providing hydraulic power for the CVS valve, and the first hydraulic passage is connected with the output end of the hydraulic power unit and the first end of the CVS valve and is used for providing power hydraulic pressure for the CVS valve; the second hydraulic passage is connected with the output end of the hydraulic power unit and the second end of the CVS valve and provides protective hydraulic pressure for the CVS valve; the first pressure relief passage is connected with the first hydraulic passage and used for adjusting power hydraulic pressure; the second pressure relief passage is connected with the second hydraulic passage and is used for regulating and protecting hydraulic pressure; the third pressure relief passage is connected with the third end of the CVS valve and used for relieving pressure of the CVS valve when the CVS valve acts; and the data acquisition unit is respectively connected with the first end of the CVS valve and the second end of the CVS valve and used for acquiring the hydraulic pressure difference between the power hydraulic pressure and the protection hydraulic pressure when the CVS valve acts. The implementation of the invention can realize the off-line test of the CVS valve, and is simple and rapid.
Description
Technical Field
The invention relates to the technical field of CVS testing, in particular to a device and a method for testing a CVS valve of a half-speed machine.
Background
The problem of closing timeout of an ALSTOM half-speed machine PTGRE01 test adjusting valve exists in a plurality of current working bases for a long time, and the closing timeout is caused by the fact that a CVS valve is jammed and does not act fundamentally. In the current operating base, the ALSTOM half speed machine CVS valve is not capable of off-line functional verification. Therefore, when the work is stopped in use, various faults of the CVS valve can be found, or the performance index of the CVS valve is changed, so that the working system cannot be timely adjusted, and the CVS valve is abnormal in the use process or the whole working system is abnormal or interrupted, thereby causing huge loss.
Disclosure of Invention
The invention aims to solve the technical problem of providing a testing device and a testing method for a CVS valve of a half-speed machine aiming at the defects of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a half-speed machine CVS valve testing apparatus is constructed, comprising:
a hydraulic power unit for providing hydraulic power to the CVS valve,
a first hydraulic passage connecting the hydraulic power unit output with the first end of the CVS valve for providing power hydraulic pressure to the CVS valve;
a second hydraulic passage connecting the hydraulic power unit output with a second end of the CVS valve for providing protection hydraulic pressure to the CVS valve;
the first pressure relief passage is connected with the first hydraulic passage and is used for adjusting the power hydraulic pressure;
a second pressure relief passage connected to the second hydraulic passage and configured to regulate the protection hydraulic pressure;
a third pressure relief passage connected to a third end of the CVS valve for relieving pressure to the CVS valve when the CVS valve is actuated;
and the data acquisition unit is respectively connected with the first end of the CVS valve and the second end of the CVS valve and is used for acquiring the hydraulic pressure difference between the power hydraulic pressure and the protection hydraulic pressure when the CVS valve acts.
Preferably, the data acquisition unit comprises a multichannel data acquisition recorder;
a first channel of the multi-channel data acquisition recorder is connected with a first end of the CVS valve and used for acquiring the power hydraulic pressure;
a second channel of the multi-channel data acquisition recorder is connected with a second end of the CVS valve and used for acquiring the protection hydraulic pressure;
the multi-channel data acquisition recorder is also used for acquiring the hydraulic pressure difference between the power hydraulic pressure and the protection hydraulic pressure.
Preferably, a first orifice is provided in the first hydraulic passage; and/or
The second hydraulic passage is provided with a second orifice.
Preferably, the first orifice and/or the second orifice is a 0.1mm orifice.
Preferably, the second hydraulic passage includes a solenoid valve, and a fourth relief passage connected to the solenoid valve; and the first end of the electromagnetic valve is connected with the output end of the hydraulic power unit, the second end of the electromagnetic valve is connected with the fourth pressure relief passage, and the third end of the electromagnetic valve is connected with the second end of the CVS valve.
Preferably, the hydraulic power unit comprises: the hydraulic system comprises a liquid storage tank, a hydraulic pump connected with the liquid storage tank, a proportional pressure regulating valve connected with the hydraulic pump, a pressure gauge connected with the output end of the hydraulic pump and a fifth pressure relief passage.
Preferably, the hydraulic power unit further comprises filters respectively disposed at an input end and an output end of the hydraulic pump.
Preferably, the first pressure relief passage, the second pressure relief passage, the third pressure relief passage, the fourth pressure relief passage, and the fifth pressure relief passage are connected to the reservoir.
Preferably, the fifth pressure relief passage includes a relief valve connecting the reservoir and an output end of the hydraulic pump through a pipe; and/or
The first pressure relief passage comprises a first overflow regulating valve, and the first overflow regulating valve is connected with the first hydraulic passage and the liquid storage tank through a pipeline; and/or
The second pressure relief passage comprises a second overflow regulating valve, and the second overflow regulating valve is connected with the second hydraulic passage and the liquid storage tank through a pipeline.
Preferably, the CVS valve testing device of the half-speed machine further comprises a leakage passage connecting the second hydraulic passage and the third end of the CVS valve, and a third throttling hole is arranged on the leakage passage, or
And a valve core of the CVS valve is provided with a leakage hole.
The invention also provides a half-speed machine CVS valve testing method, which adopts the half-speed machine CVS valve testing device in any item above for testing, and comprises the following steps:
s1, setting a hydraulic power unit to output hydraulic pressure with preset pressure, wherein the power hydraulic pressure of the CVS valve is equal to the protection hydraulic pressure of the CVS valve, and the CVS valve is in a closed state;
s2, opening and adjusting a second pressure relief passage to reduce the protection hydraulic pressure of the CVS valve until the CVS valve is opened;
and S3, recording the hydraulic pressure difference between the power hydraulic pressure of the CVS valve and the protection hydraulic pressure of the CVS valve when the CVS valve is opened by the data acquisition unit as the hydraulic pressure difference of the CVS valve when the CVS valve is opened.
Preferably, the test method further comprises:
s4, adjusting a second pressure relief passage to increase the protective hydraulic pressure of the CVS valve until the CVS valve is closed;
and S5, the data acquisition unit records that when the CVS valve is closed, the hydraulic pressure difference between the power hydraulic pressure of the CVS valve and the protection hydraulic pressure of the CVS valve is the CVS valve closing hydraulic pressure difference.
Preferably, the test method further comprises:
in step S3, the data acquisition unit records that the protection hydraulic pressure of the CVS valve corresponding to when the CVS valve is opened is a first protection hydraulic pressure,
in the step S5, the data acquisition unit records that the protection hydraulic pressure of the CVS valve corresponding to the closing of the CVS valve is a second protection hydraulic pressure; and
and S6, calculating the difference value of the first protection hydraulic pressure and the second protection hydraulic pressure to obtain the protection hydraulic pressure return difference of the CVS valve.
The device and the method for testing the CVS valve of the half-speed machine have the following beneficial effects that: the off-line test of the CVS valve can be realized, and the method is simple and rapid.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic structural diagram of a first embodiment of a CVS valve testing device of a half-speed machine according to the invention;
FIG. 2 is a schematic structural diagram of a CVS valve testing device of a half-speed machine according to a second embodiment of the invention;
FIG. 3 is a schematic structural diagram of a CVS valve testing device of a half-speed machine according to a third embodiment of the invention;
FIG. 4 is a schematic flow chart of a CVS valve testing method for a half-speed machine according to a first embodiment of the invention;
FIG. 5 is a schematic flow chart of a CVS valve testing method for a half-speed machine according to a second embodiment of the invention;
fig. 6 is a schematic flow chart of a CVS valve testing method for a half-speed machine according to a third embodiment of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, in a first embodiment of a CVS valve testing apparatus for a half-speed machine according to the present invention, the apparatus includes: the hydraulic power unit 20 is used for providing hydraulic power for the CVS valve 10, and the first hydraulic passage 30 is connected with the output end of the hydraulic power unit 20 and the first end of the CVS valve 10 and used for providing power hydraulic pressure for the CVS valve 10; a second hydraulic passage 40, wherein the second hydraulic passage 40 is connected with the output end of the hydraulic power unit 20 and the second end of the CVS valve 10 and is used for providing protection hydraulic pressure for the CVS valve 10; a first pressure relief passage 50, the first pressure relief passage 50 being connected to the first hydraulic passage 30 for adjusting the power hydraulic pressure; a second relief passage 60, the second relief passage 60 being connected to the second hydraulic passage 40 for regulating the protection hydraulic pressure; a third pressure relief passage 70, the third pressure relief passage 70 being connected to a third end of the CVS valve 10 and adapted to relieve pressure to the CVS valve 10 when the CVS valve 10 operates; and the data acquisition unit 80 is connected with the first end of the CVS valve 10 and the second end of the CVS valve 10 respectively, and is used for acquiring the hydraulic pressure difference between the power hydraulic pressure and the protection hydraulic pressure when the CVS valve 10 acts. Specifically, during normal use, the CVS valve 10 is supplied with working hydraulic pressure by the hydraulic power unit 20, and when the working environment is normal, that is, the CVS valve is in a corresponding working state, the power hydraulic pressure supplied from the first hydraulic passage 30 connected to the first end of the CVS valve 10 is the same as or similar to the protection hydraulic pressure supplied from the second hydraulic passage 40 connected to the second end of the CVS valve 10. When the device tests the CVS valve 10, the protection hydraulic pressure of the second end of the CVS valve can be adjusted through the second pressure relief passage 60, the protection hydraulic pressure is reduced, a hydraulic pressure difference is formed between the protection hydraulic pressure and the power hydraulic pressure of the first end of the CVS valve 10, the working condition of the CVS valve 10 can be observed in the process of adjusting the formed hydraulic pressure difference, after the CVS valve 10 is opened, the third pressure relief passage 70 relieves pressure of the CVS valve 10, the data acquisition unit 80 records the hydraulic pressure difference at the moment, the opening hydraulic pressure difference of the CVS valve 10 can be acquired, and the test of one characteristic index of the CVS valve 10 can be completed. It will be appreciated that during testing, various different characteristic indicators of CVS valve 10 may be tested by cooperation of first pressure relief passage 50, second pressure relief passage 60, third pressure relief passage 70 and data acquisition unit 80, and is not limited to the one open hydraulic pressure differential test described above. In addition, the action of the CVS valve 10 may also be determined by the power hydraulic pressure acquired by the data acquisition unit 80, and after the CVS valve 10 is opened, because the third pressure relief passage 70 relieves the pressure of the CVS valve 10, the power hydraulic pressure may be reduced at this time, that is, the reduced point is recorded as the action point, that is, the opening point, of the CVS valve 10. It will also be appreciated that the second pressure relief passage 60 is used to regulate the power hydraulics.
Optionally, as in the embodiment shown in fig. 2 and 3, the data acquisition unit 80 includes a multi-channel data acquisition recorder 81; a first channel of the multi-channel data acquisition recorder 81 is connected with a first end of the CVS valve 10 and used for acquiring power hydraulic pressure; a second channel of the multi-channel data acquisition recorder 81 is connected with a second end of the CVS valve 10 and used for acquiring protection hydraulic pressure; the multi-channel data acquisition recorder is also used for acquiring the hydraulic pressure difference between the power hydraulic pressure and the protection hydraulic pressure. Specifically, the multi-channel data acquisition recorder 81 generally includes at least two channels, which can respectively acquire and record the power hydraulic pressure at the first end of the CVS valve 10 and the protection hydraulic pressure at the second end of the CVS valve 10, and calculate the hydraulic pressure difference between the two.
Alternatively, on the basis of the above, the first orifice 31 may be provided in the first hydraulic passage 30; the second hydraulic passage 40 may be provided with a second orifice 41. Specifically, during the process that the power hydraulic pressure enters the first end of the CVS valve 10 through the first hydraulic passage 30, the first throttle hole 31 can prevent the power hydraulic pressure from being discharged when the protection hydraulic pressure is discharged. During the process that the protection hydraulic pressure enters the second end of the CVS valve 10 through the second hydraulic passage 40, the second orifice 41 can also prevent the relief of the power hydraulic pressure when the protection hydraulic pressure is relieved.
Further, the first orifice 31 may be a 0.1mm orifice, and the second orifice 41 may be a 0.1mm orifice.
Alternatively, the second hydraulic passage 40 includes a solenoid valve 42, and a fourth relief passage 43 connected to the solenoid valve 42; a first end of the solenoid valve 42 is connected to the output end of the hydraulic power unit 20, a second end of the solenoid valve 42 is connected to the fourth pressure relief passage 43, and a third end of the solenoid valve 42 is connected to the second end of the CVS valve 10. Specifically, under normal conditions, the solenoid valve 42 is in a de-energized state, and the output of the hydraulic power unit 20 is conducted to the second end of the CVS valve 10 through the first end of the solenoid valve 42 and the third end of the solenoid valve 42. When the electromagnetic valve 42 is electrically excited, the second end of the CVS valve 10 is connected to the fourth pressure relief passage 43 through the third end of the electromagnetic valve 42 and the bottom end of the electromagnetic valve 42, so as to perform pressure relief for protecting hydraulic pressure.
Alternatively, the hydraulic power unit 20 includes: a reservoir 21, a hydraulic pump 23 connected to the reservoir 21, a proportional pressure regulating valve 28 connected to the hydraulic pump 23, and a pressure gauge 26 and a fifth pressure relief passage 27 connected to an output end of the hydraulic pump 23. Specifically, the hydraulic power unit 20 for supplying hydraulic power includes a tank 21, the tank 21 is connected to a hydraulic pump 23, liquid is pumped from the tank 21 by the hydraulic pump 23 to supply hydraulic power, the hydraulic power output from the hydraulic pump 23 is regulated by a proportional pressure regulating valve 28 connected to the hydraulic pump 23, a pressure value of the hydraulic power is monitored by a pressure gauge 26, and the output from the hydraulic pump 23 is depressurized through a fifth relief passage 27, if necessary, to protect the hydraulic pump 23. It will be appreciated that the hydraulic pump 23 may be an oil pump and the reservoir 21 may be an oil tank.
Further, on the above basis, the hydraulic power unit 20 further includes filters 22, 24 respectively provided at the input and output ends of the hydraulic pump 23. Specifically, the filter 22 is arranged at the input end of the oil pump to protect impurities from entering the oil pump to damage the oil pump, and the filter 24 is arranged at the output end of the oil pump to filter impurities, so that the impurities are prevented from entering the CVS valve 10 to damage the CVS valve 10.
Further, the first relief passage 50, the second relief passage 60, the third relief passage 70, the fourth relief passage 43, and the fifth relief passage 27 are all connected to the reservoir 21. Specifically, in order to circulate the hydraulic oil, the first pressure relief passage 50, the second pressure relief passage 60, the third pressure relief passage 70, the fourth pressure relief passage 43, and the fifth pressure relief passage 27 may be connected to the tank 21, so that an approximately closed circulation system may be formed.
Further, in an embodiment, the fifth pressure relief passage 27 includes a relief valve 271, and the relief valve 271 connects the reservoir 21 and the output end of the hydraulic pump 23 through a pipe; specifically, the fifth pressure relief passage 27 is controlled to be turned on or off by the safety valve 271, during normal use, the safety valve 271 is closed, the fifth pressure relief passage 27 is in an off state, when the hydraulic pressure at the output end of the oil pump exceeds the safety threshold of the safety valve 271, the safety valve 271 is opened, the fifth pressure relief passage 27 is turned on, the output of the oil pump is relieved, and the power hydraulic pressure at the first end of the CVS valve 10 is guaranteed to be normal.
In one embodiment, the first pressure relief passage 50 includes a first relief valve 51, and the first relief valve 51 connects the first hydraulic passage 30 and the reservoir 21 through a pipe; specifically, the first relief passage 50 is provided with a first relief valve 51, and the power hydraulic pressure at the first end of the CVS valve 10 can be adjusted by the first relief valve 51. According to the specific principle, the first overflow regulating valve 51 is regulated to enable the liquid part of the power hydraulic pressure to enter the liquid storage tank 21 through the first pressure relief passage 50, so that the power hydraulic pressure entering the first end of the CVS valve 10 is reduced.
In one embodiment, the second pressure relief path 60 includes a second relief valve 61, and the second relief valve 61 connects the second hydraulic path 40 and the reservoir 21 through a pipe. Specifically, a second relief valve 61 is disposed on the second pressure relief passage 60, and the protection hydraulic pressure at the second end of the CVS valve 10 can be adjusted by the second relief valve 61. According to the specific principle, the second overflow regulating valve 61 is regulated, so that the liquid part of the protection hydraulic pressure enters the liquid storage tank 21 through the second pressure relief passage 60, and the protection hydraulic pressure entering the second end of the CVS valve 10 is reduced.
Optionally, as shown in the embodiment shown in fig. 2, the CVS valve testing apparatus for a half-speed engine according to the present invention further includes a leakage path 91 connecting the second hydraulic path 40 and the third end of the CVS valve 10, and the leakage path 91 is provided with a third orifice 911. Specifically, the third orifice 911 may be two series 0.5mm orifices to protect the fluidity of the protection oil in the hydraulic pressure from oil deterioration by position protection through the third orifice on the leak path 91.
Optionally, as shown in the embodiment shown in fig. 3, in the CVS valve testing apparatus for a half-speed engine according to the present invention, a valve core of the CVS valve 10 is provided with a leakage hole 92. Specifically, in practical situations, a dead oil may be formed in the second hydraulic passage 40 near the second end of the CVS valve 10, which may cause oil deterioration, impurities, jamming of the CVS valve 10 during actuation of the CVS valve 10, and failure of the CVS valve 10. The orifice can be added on the valve core of the CVS valve 10 to make the protection oil have fluidity fundamentally and have no dead oil, so that the technical problem of CVS jamming can be solved fundamentally, the leakage hole 92 can be a 0.42mm orifice, the 0.42mm orifice can be equivalent to two 0.5mm orifices which are connected in series, and the aim of maintaining the same leakage amount is taken as the basis.
In addition, a half-speed machine CVS valve testing method of the present invention adopts any one of the above half-speed machine CVS valve testing apparatuses to perform testing, as shown in fig. 4, in an embodiment, the testing method includes:
s1, setting the hydraulic power unit 20 to output hydraulic pressure with preset pressure, wherein the power hydraulic pressure of the CVS valve 10 is equal to the protection hydraulic pressure of the CVS valve 10, and the CVS valve 10 is in a closed state; specifically, the hydraulic pressure at the time of normal operation of the CVS valve 10, or corresponding to the normal operation environment of the CVS valve 10, may include a power hydraulic pressure connected to a first end of the CVS valve 10 and a protection hydraulic pressure connected to a second end of the CVS valve 10, which are output through the hydraulic power unit 20. Under normal working conditions, the power hydraulic pressure and the protection hydraulic pressure are equal or approximately equal, and the CVS is in a closed state.
S2, opening and adjusting the second pressure relief path 60 to reduce the protection hydraulic pressure of the CVS valve 10 until the CVS valve 10 is opened; specifically, the CVS opening test is performed by opening the second pressure relief passage 60 to communicate with the second end of the CVS valve 10, and releasing the protection hydraulic pressure of the CVS valve 10, and the second pressure relief passage 60 may be adjusted to gradually reduce the protection hydraulic pressure of the CVS valve 10 until the hydraulic pressure difference between the power hydraulic pressure of the CVS valve 10 and the protection hydraulic pressure reaches a value, at this time, the CVS valve 10 is opened, and at this time, the power hydraulic pressure of the CVS valve 10 may be released through the third pressure relief passage 70. It can be understood that during the opening of the second relief passage 60, it is necessary to slowly adjust the output of the second relief passage 60 so that the protection hydraulic pressure slowly decreases, and when the output decreases to a fixed value, the oil pressure difference on both sides of the CVS valve is opened against the spring force of the CVS or the like.
S3, the data acquisition unit 80 records that when the CVS valve 10 is opened, the hydraulic pressure difference between the power hydraulic pressure of the CVS valve 10 and the protection hydraulic pressure of the CVS valve 10 is the opening hydraulic pressure difference of the CVS valve 10. Specifically, the data acquisition unit 80 records that when the CVS is opened, the hydraulic pressure difference between the power hydraulic pressure and the protection hydraulic pressure is the opening hydraulic pressure difference of the CVS valve 10. It can be understood that, when the power hydraulic pressure of the CVS valve 10 is relieved through the third relief passage 70, the data acquisition unit 80 records that the hydraulic pressure value of the power hydraulic pressure is suddenly reduced, the reduction point is the opening point of the CVS valve 10, and the hydraulic pressure difference between the power hydraulic pressure and the protection hydraulic pressure at this time is the opening hydraulic pressure difference of the CVS valve 10.
Further, as shown in fig. 5, the method for testing the CVS valve of the half-speed engine according to the present invention further includes:
s4, adjusting the second pressure relief passage 60 to increase the protection hydraulic pressure of the CVS valve 10 until the CVS valve 10 is closed; specifically, the second pressure relief path 60 is continuously adjusted to increase the protection hydraulic pressure of the CVS valve 10, so as to reduce the hydraulic pressure difference between the protection hydraulic pressure and the power hydraulic pressure, and as the protection hydraulic pressure increases, the CVS valve 10 is closed, that is, the third pressure relief path 70 is closed.
S5, the data acquisition unit 80 records that when the CVS valve 10 is closed, the hydraulic pressure difference between the power hydraulic pressure of the CVS valve 10 and the protection hydraulic pressure of the CVS valve 10 is the closing hydraulic pressure difference of the CVS valve 10. Specifically, the data acquisition unit 80 records that the hydraulic pressure difference between the power hydraulic pressure and the protection hydraulic pressure when the CVS valve 10 is closed is the closing hydraulic pressure difference of the CVS valve 10. It can be understood that when the connection between the power hydraulic pressure of the CVS valve 10 and the third pressure relief passage 70 is cut off, the data acquisition unit 80 records that the hydraulic pressure value of the power hydraulic pressure suddenly rises, the rising point is the closing point of the CVS valve 10, and the hydraulic pressure difference between the power hydraulic pressure and the protection hydraulic pressure at this time is the closing hydraulic pressure difference of the CVS valve 10.
Optionally, as shown in fig. 6, in an embodiment, a method for testing a CVS valve of a half-speed machine of the present invention includes:
s11, setting the hydraulic power unit 20 to output hydraulic pressure with preset pressure, wherein the power hydraulic pressure of the CVS valve 10 is equal to the protection hydraulic pressure of the CVS valve 10, and the CVS valve 10 is in a closed state; specifically, the hydraulic pressure at the time of normal operation of the CVS valve 10, or corresponding to the normal operation environment of the CVS valve 10, may include a power hydraulic pressure connected to a first end of the CVS valve 10 and a protection hydraulic pressure connected to a second end of the CVS valve 10, which are output through the hydraulic power unit 20. Under normal working conditions, the power hydraulic pressure and the protection hydraulic pressure are equal or approximately equal, and the CVS is in a closed state.
S21, opening and adjusting the second pressure relief path 60 to reduce the protection hydraulic pressure of the CVS valve 10 until the CVS valve 10 is opened; specifically, the CVS opening test is performed by opening the second pressure relief passage 60 to communicate with the second end of the CVS valve 10, and releasing the protection hydraulic pressure of the CVS valve 10, and the second pressure relief passage 60 may be adjusted to gradually reduce the protection hydraulic pressure of the CVS valve 10 until the hydraulic pressure difference between the power hydraulic pressure of the CVS valve 10 and the protection hydraulic pressure reaches a value, at this time, the CVS valve 10 is opened, and at this time, the power hydraulic pressure of the CVS valve 10 may be released through the third pressure relief passage 70.
S31, the data acquisition unit 80 records that the protection hydraulic pressure of the CVS valve 10 corresponding to when the CVS valve 10 is opened is the first protection hydraulic pressure, and specifically, the data acquisition unit 80 records that the hydraulic pressure value of the protection hydraulic pressure at the second end of the CVS valve 10 is recorded as the first protection hydraulic pressure of the CVS valve 10 when the CVS is opened.
S41, adjusting the second pressure relief passage 60 to increase the protection hydraulic pressure of the CVS valve 10 until the CVS valve 10 is closed; specifically, the second pressure relief path 60 is continuously adjusted to increase the protection hydraulic pressure of the CVS valve 10, so as to reduce the hydraulic pressure difference between the protection hydraulic pressure and the power hydraulic pressure, and as the protection hydraulic pressure increases, the CVS valve 10 is closed, that is, the third pressure relief path 70 is closed.
S51, the data acquisition unit 80 records the protection hydraulic pressure of the corresponding CVS valve 10 as a second protection hydraulic pressure when the CVS valve 10 is closed; specifically, the data acquisition unit 80 records that the protection hydraulic pressure of the CVS valve 10 is the second protection hydraulic pressure when the CVS valve 10 is closed.
And S6, calculating the difference value of the first protection hydraulic pressure and the second protection hydraulic pressure to obtain the protection hydraulic pressure return difference of the CVS valve 10. Specifically, calculating the difference between the first protection hydraulic pressure and the second protection hydraulic pressure may obtain the protection hydraulic return difference of the CVS valve 10.
By the testing device and the testing method, offline functional verification of the CVS valve of the ALSTOM half-speed machine can be completed; meanwhile, the length and the thickness of the CVS spring, the difference of the structure and the functional difference caused by the difference can be verified in multiple bases. The testing method can also comprise the test of other indexes or performances of the CVS valve.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (13)
1. A half-speed machine CVS valve testing arrangement which characterized in that includes:
a hydraulic power unit (20), the hydraulic power unit (20) for providing hydraulic power to the CVS valve (10),
a first hydraulic passage (30), the first hydraulic passage (30) connecting the output of the hydraulic power unit (20) and the first end of the CVS valve (10) for providing power hydraulic pressure to the CVS valve (10);
a second hydraulic passage (40), the second hydraulic passage (40) connecting the output of the hydraulic power unit (20) and the second end of the CVS valve (10) for providing protection hydraulic pressure to the CVS valve (10);
a first pressure relief passage (50), said first pressure relief passage (50) connecting said first hydraulic passage (30) for regulating said power hydraulic pressure;
a second pressure relief passage (60), the second pressure relief passage (60) being connected to the second hydraulic passage (40) for regulating the protection hydraulic pressure;
a third pressure relief passage (70), said third pressure relief passage (70) being connected to a third end of said CVS valve (10) for relieving pressure to said CVS valve (10) when said CVS valve (10) is actuated;
the data acquisition unit (80) is respectively connected with the first end of the CVS valve (10) and the second end of the CVS valve (10) and used for acquiring the hydraulic pressure difference between the power hydraulic pressure and the protection hydraulic pressure when the CVS valve (10) acts.
2. A half-speed machine CVS valve testing device according to claim 1, characterized in that said data acquisition unit (80) comprises a multichannel data acquisition recorder (81);
a first channel of the multi-channel data acquisition recorder (81) is connected with a first end of the CVS valve (10) and is used for acquiring the power hydraulic pressure;
a second channel of the multi-channel data acquisition recorder (81) is connected with a second end of the CVS valve (10) and used for acquiring the protection hydraulic pressure;
the multi-channel data acquisition recorder (81) is also used for acquiring the hydraulic pressure difference between the power hydraulic pressure and the protection hydraulic pressure.
3. A half-speed machine CVS valve test set according to claim 1, characterized in that the first hydraulic passage (30) is provided with a first orifice (31); and/or
A second orifice (41) is provided in the second hydraulic passage (40).
4. A semi-speed machine CVS valve testing device according to claim 3, characterized in that the first throttle hole (31) and/or the second throttle hole (41) is a 0.1mm throttle hole.
5. A half-speed machine CVS valve test device according to claim 1, characterized in that said second hydraulic passage (40) comprises a solenoid valve (42), and a fourth pressure relief passage (43) connected to said solenoid valve (42); the first end of the electromagnetic valve (42) is connected with the output end of the hydraulic power unit (20), the second end of the electromagnetic valve (42) is connected with the fourth pressure relief passage, and the third end of the electromagnetic valve (42) is connected with the second end of the CVS valve (10).
6. A CVS valve test device for half speed machines according to claim 5 characterized in that said hydraulic power unit (20) includes: the hydraulic control system comprises a liquid storage tank (21), a hydraulic pump (23) connected with the liquid storage tank (21), a proportional pressure regulating valve (28) connected with the hydraulic pump (23), and a pressure gauge (26) and a fifth pressure relief passage (27) which are connected with the output end of the hydraulic pump (23).
7. A CVS valve test device for a half speed machine according to claim 6 characterised in that the hydraulic power unit (20) also includes filters (22, 24) respectively provided at the input and output of the hydraulic pump (23).
8. A CVS valve test device according to claim 6, characterized in that said first pressure relief passage (50), said second pressure relief passage (60), said third pressure relief passage (70), said fourth pressure relief passage (43) and said fifth pressure relief passage (27) are all connected to said tank (21).
9. The CVS valve testing device of claim 7, characterized in that the fifth relief passage (27) includes a relief valve (271), the relief valve (271) connecting the reservoir (21) with the output of the hydraulic pump (23) through a conduit; and/or
The first pressure relief passage (50) comprises a first overflow regulating valve (51), and the first overflow regulating valve (51) is connected with the first hydraulic passage (30) and the liquid storage tank (21) through a pipeline; and/or
The second pressure relief passage (60) comprises a second overflow regulating valve (61), and the second overflow regulating valve (61) is connected with the second hydraulic passage (40) and the liquid storage tank (21) through a pipeline.
10. A CVS valve test device according to claim 1 in which the further includes a leak path (91) connecting the second hydraulic path (40) and the third end of the CVS valve (10), the leak path (91) having a third orifice (911) disposed thereon, or
And a valve core of the CVS valve (10) is provided with a leakage hole (92).
11. A half-speed machine CVS valve testing method, characterized in that the testing is performed using the half-speed machine CVS valve testing apparatus of any one of claims 1 to 10, the testing method comprising:
s1, setting a hydraulic power unit to output hydraulic pressure with preset pressure, wherein the power hydraulic pressure of the CVS valve is equal to the protection hydraulic pressure of the CVS valve, and the CVS valve is in a closed state;
s2, opening and adjusting a second pressure relief passage to reduce the protection hydraulic pressure of the CVS valve until the CVS valve is opened;
and S3, recording the hydraulic pressure difference between the power hydraulic pressure of the CVS valve and the protection hydraulic pressure of the CVS valve when the CVS valve is opened by the data acquisition unit as the hydraulic pressure difference of the CVS valve when the CVS valve is opened.
12. A half speed machine CVS valve testing method as claimed in claim 11, characterized in that the testing method further comprises:
s4, adjusting a second pressure relief passage to increase the protective hydraulic pressure of the CVS valve until the CVS valve is closed;
and S5, the data acquisition unit records that when the CVS valve is closed, the hydraulic pressure difference between the power hydraulic pressure of the CVS valve and the protection hydraulic pressure of the CVS valve is the CVS valve closing hydraulic pressure difference.
13. A half speed machine CVS valve testing method as claimed in claim 12, characterized in that the testing method further comprises:
in step S3, the data acquisition unit records that the protection hydraulic pressure of the CVS valve corresponding to when the CVS valve is open is a first protection hydraulic pressure,
in the step S5, the data acquisition unit records that the protection hydraulic pressure of the CVS valve corresponding to the closing of the CVS valve is a second protection hydraulic pressure; and
and S6, calculating the difference value of the first protection hydraulic pressure and the second protection hydraulic pressure to obtain the protection hydraulic pressure return difference of the CVS valve.
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| US4615722A (en) * | 1985-09-20 | 1986-10-07 | Owens-Illinois, Inc. | Valve block test apparatus |
| CN102705302B (en) * | 2012-05-11 | 2015-02-04 | 浙江大学 | Dynamic testing system for high-pressure large-flow oil cylinder |
| CN103696813B (en) * | 2013-12-20 | 2015-10-28 | 中广核核电运营有限公司 | Nuclear power plant's half speed turbine governor valve control fastener dead area compensation adjusting method |
| US10401066B2 (en) * | 2014-03-14 | 2019-09-03 | Errecom S.R.L. | Apparatus for injecting a fluid in a pressurized air conditioning or refrigeration system |
| CN103982249B (en) * | 2014-05-04 | 2017-07-04 | 上海汇益控制系统股份有限公司 | The emergency trip device of isolation experiment signal |
| CN105157974A (en) * | 2015-09-10 | 2015-12-16 | 福州大学 | High pressure bulk flow cartridge inserted valve test system based on LabVIEW and realization method |
| CN106762890B (en) * | 2017-01-23 | 2018-01-30 | 中南大学 | A kind of test bed hydraulic control system of multifunction hydraulic |
| CN107387502B (en) * | 2017-09-04 | 2019-06-14 | 上海意称液压系统有限公司 | A kind of integrated test system and method for valve body |
| CN109443747B (en) * | 2018-11-14 | 2020-11-20 | 邹城市劳思模具制造有限公司 | Automatic testing equipment for two-position two-way threaded cartridge valve and working method thereof |
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