CN215634637U - Damping regulating valve internal characteristic testing equipment for reducing working condition of shock absorber - Google Patents
Damping regulating valve internal characteristic testing equipment for reducing working condition of shock absorber Download PDFInfo
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- CN215634637U CN215634637U CN202122022440.5U CN202122022440U CN215634637U CN 215634637 U CN215634637 U CN 215634637U CN 202122022440 U CN202122022440 U CN 202122022440U CN 215634637 U CN215634637 U CN 215634637U
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Abstract
The application discloses characteristic test equipment in damping control valve of reduction shock absorber operating mode belongs to hydraulic pressure technical field, including drive structure, test hydraulic cylinder, frock seat, current input device, first pressure detection component, displacement detection component and second pressure detection component. The driving structure is used for driving the testing hydraulic cylinder to work, two ends of the tool base are respectively communicated with two ends of the testing hydraulic cylinder, and the damping adjusting valve to be tested is installed in the tool base. The device for testing the internal characteristics of the damping regulating valve under the reducing vibration absorber working condition can comprehensively test the temperature, current, flow and pressure difference performance of an oil medium flowing through the damping regulating valve respectively, and can control one data to be unchanged by controlling a variable method, and research the interrelation of the other two data so as to obtain the pairwise relative relationship between the data, so that the obtained data of the damping regulating valve is more comprehensive and accurate.
Description
Technical Field
The utility model relates to the technical field of hydraulic pressure, in particular to a device for testing the internal characteristics of a damping regulating valve for reducing the working condition of a shock absorber.
Background
The regulating valve is also called a control valve, and in the field of industrial automation process control, the final control element for changing the process parameters of medium flow, pressure, temperature, liquid level and the like by power operation through receiving the control signal output by a regulating control unit. In the automatic control of modern plants, control valves play a very important role, and the production of these plants depends on the correct distribution and control of the flowing medium. These controls, whether energy exchange, pressure reduction, or simple vessel charging, require some final control element to accomplish. Therefore, the performance of the regulator valve itself is particularly important.
The existing testing device can only test a certain performance of the regulating valve and cannot test the comprehensive performance of the regulating valve.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a device for testing the internal characteristics of a damping regulating valve under the condition of reducing the working condition of a shock absorber, which aims to solve the problems.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
based on the above purpose, the utility model discloses a device for testing the internal characteristics of a damping regulating valve under the condition of reducing a shock absorber, which comprises:
a drive structure;
the test hydraulic cylinder comprises a cylinder body and a piston rod, the piston rod is connected with the cylinder body in a sliding mode, and the piston rod is in transmission connection with the driving structure;
the two ends of the tool seat are respectively communicated with the two ends of the cylinder body;
the current input device is electrically connected with the tool seat;
a first pressure sensing element mounted between the drive structure and the piston rod for measuring pressure between the drive structure and the piston rod;
a displacement detecting element for measuring a displacement amount of the piston rod; and
and the second pressure detection element is used for measuring the oil pressure of the tool seat.
Optionally: the cylinder body comprises a cavity, the cavity is divided into a rod cavity and a rodless cavity which are mutually independent by the piston rod, and the second pressure detection element is used for measuring the pressure in the rod cavity.
Optionally: the oil tank assembly is communicated with the rod cavity and the rodless cavity respectively.
Optionally: the oil tank assembly comprises a test loop oil tank, a first test oil pipe, a second test oil pipe, an oil supplementing pipe and a test loop oil supplementing tank, the test loop oil tank passes through the first test oil pipe and is communicated with the rod cavity, the test loop oil tank passes through the second test oil pipe and is communicated with the rodless cavity, a stop valve and an electromagnetic proportional overflow valve are arranged on the first test oil pipe and the second test oil pipe, and the test loop oil supplementing tank passes through the oil supplementing pipe and is communicated with the second test oil pipe.
Optionally: the test loop oil supplementing tank is communicated with the rodless cavity, an electromagnetic proportional overflow valve and a one-way valve are arranged between the test loop oil supplementing tank and the rodless cavity, and the one-way valve enables liquid to enter the rodless cavity only along the test loop oil supplementing tank;
and the oil supplementing pipe is also provided with a one-way valve, and the one-way valve enables liquid to enter the test loop oil supplementing tank only along the second test oil pipe.
Optionally: the pressure sensor also comprises a pressure difference detection element, and two ends of the pressure difference detection element are respectively used for measuring the pressure in the rod cavity and the pressure in the rodless cavity.
Optionally: still include incubator and temperature-detecting element, the cylinder body is located in the incubator, temperature-detecting element connect in the cylinder body with between the frock seat.
Optionally: the hydraulic testing device comprises a connecting piece and at least two testing hydraulic cylinders, wherein the cylinder bodies in the testing hydraulic cylinders are arranged side by side, two adjacent cylinder bodies are communicated with each other through rod cavities, two adjacent rodless cavities between the cylinder bodies are communicated with each other, all the piston rods are connected with the connecting piece, and the connecting piece is in transmission connection with a driving knot.
Optionally: the driving structure comprises a driving loop oil tank, an oil return pipe, an oil outlet pipe, a three-position five-way reversing valve and a driving hydraulic cylinder, the driving loop oil tank is connected with a P valve port of the three-position five-way reversing valve through the oil outlet pipe, the driving loop oil tank is connected with a T valve port of the three-position five-way reversing valve through the oil return pipe, a valve port A and a valve port B of the three-position five-way reversing valve are respectively communicated with two ends of the driving hydraulic cylinder, and the driving hydraulic cylinder is in transmission connection with the piston rod.
Optionally: the driving structure comprises an electro-hydraulic servo actuator, and the electro-hydraulic servo actuator is in transmission connection with the piston rod.
Compared with the prior art, the utility model has the following beneficial effects:
the device for testing the internal characteristics of the damping regulating valve under the reducing vibration absorber working condition can comprehensively test the temperature, current, flow and pressure difference performance of an oil medium flowing through the damping regulating valve respectively, and can control one data to be unchanged by controlling a variable method, and research the interrelation of the other two data so as to obtain the pairwise relative relationship between the data, so that the obtained data of the damping regulating valve is more comprehensive and accurate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic diagram showing a device for testing the internal characteristics of a damping control valve of a first reducing shock absorber under the working condition disclosed in embodiment 1 of the utility model;
FIG. 2 shows a schematic view of the test cylinder disclosed in embodiment 1 of the present invention;
FIG. 3 is a schematic diagram showing a device for testing the internal characteristics of a damping control valve of a second reducing shock absorber under the working conditions disclosed in embodiment 1 of the utility model;
FIG. 4 is a schematic view showing a device for testing the characteristics of the inside of a damping control valve of a third reducing shock absorber operating condition disclosed in embodiment 1 of the present invention;
FIG. 5 is a schematic view showing a device for testing the internal characteristics of a damping control valve for a fourth reducing shock absorber operating condition disclosed in embodiment 1 of the present invention;
FIG. 6 is a schematic diagram showing a device for testing the internal characteristics of a damping control valve of a fifth reducing shock absorber operating mode disclosed in embodiment 1 of the present invention;
FIG. 7 is a schematic diagram showing a device for testing the internal characteristics of a damping control valve for reducing the working condition of a shock absorber according to a first embodiment of the present invention;
FIG. 8 is a schematic view showing a device for testing the internal characteristics of a damping control valve for reducing the operating conditions of a shock absorber according to a second embodiment of the present invention;
FIG. 9 is a schematic view showing a device for testing the characteristics of the inside of a damping control valve of a third reducing shock absorber operating condition disclosed in embodiment 2 of the present invention;
FIG. 10 is a schematic diagram showing a damping control valve internal characteristic test apparatus for a fourth reducing shock absorber operating condition disclosed in embodiment 2 of the present invention.
In the figure: 11-an incubator; 12-testing the hydraulic cylinder; 121-cylinder body; 122-a piston rod; 123-cavity; 124-rod cavity; 125-rodless chamber; 13-a tool seat; 14-a first pressure-sensing element; 15-a second pressure-sensing element; 16-a displacement detection element; 17-current input means; 18-differential pressure sensing element; 19-testing a loop tank; 20-a stop valve; 21-a first test tubing; 22-a second test tubing; 23-a one-way valve; 24-a liquid level meter; 25-drive circuit oil tank; 26-an oil return pipe; 27-an oil outlet pipe; 28-a three-position five-way reversing valve; 29-driving the hydraulic cylinder; 30-a temperature sensing element; 31-electromagnetic proportional relief valve; 32-electro-hydraulic servo actuators; 33-two-position two-way switch valve; 34-testing the oil supplementing tank of the loop.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, as disclosed in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Example 1:
referring to fig. 1 to 6, an embodiment of the utility model discloses a damping control valve internal characteristic test device for reducing working conditions of a shock absorber, which comprises a driving structure, a test hydraulic cylinder 12, a tool seat 13, a current input device 17, a first pressure detection element 14, a displacement detection element 16 and a second pressure detection element 15. The driving structure is used for driving the testing hydraulic cylinder 12 to work, two ends of the tool base 13 are respectively communicated with two ends of the testing hydraulic cylinder 12, and a damping adjusting valve to be tested is installed in the tool base 13.
The device for testing the internal characteristics of the damping regulating valve under the reducing vibration absorber working condition can comprehensively test the temperature, current, flow and pressure difference performance of an oil medium flowing through the damping regulating valve respectively, one data can be controlled to be unchanged by controlling a variable method, the interrelation of the other two data is researched, and then the pairwise relative relationship between the data is obtained, so that the obtained data of the damping regulating valve is more comprehensive and accurate.
The testing hydraulic cylinder 12 comprises a cylinder body 121 and a piston rod 122, the piston rod 122 is connected with the cylinder body 121 in a sliding mode, and the piston rod 122 is connected with the driving structure in a transmission mode. A first pressure sensing element 14 is mounted between the drive structure and the piston rod 122, the first pressure sensing element 14 being adapted to measure the pressure between the drive structure and the piston rod 122. The displacement detecting element 16 is used for measuring the displacement of the piston rod 122 to calculate the moving speed of the piston rod 122.
The cylinder 121 includes a chamber 123, and the piston rod 122 divides the chamber 123 into a rod chamber 124 and a rod-less chamber 125 which are independent of each other. The two ends of the tool seat 13 are respectively communicated with the rod cavity 124 and the rodless cavity 125. The two second pressure detecting elements 15 are respectively installed at two ends of the tool seat 13, and the two second pressure detecting elements 15 are respectively used for measuring the pressures in the rod cavity 124 and the rod-free cavity 125, that is, the pressures at two ends of the tool seat 13. The current input device 17 is electrically connected to the tool holder 13, and the current input device 17 is used for inputting current into the tool holder 13. A differential pressure detecting element 18 may be further mounted on the tool seat 13, and both ends of the differential pressure detecting element 18 are respectively used for measuring the pressure in the rod cavity 124 and the rod-free cavity 125.
The test hydraulic cylinder 12 may be provided singly or in plurality. When the test hydraulic cylinders 12 are provided in plurality, the cylinder bodies 121 in the test hydraulic cylinders 12 are arranged in parallel, the rod cavities 124 between two adjacent cylinder bodies 121 are communicated with each other, the rod-free cavities 125 between two adjacent cylinder bodies 121 are communicated with each other, all the piston rods 122 are connected with the connecting members, and the connecting members are in transmission connection with the driving knot.
A two-position two-way switch valve 33 may be disposed between the tool seat 13 and the testing hydraulic cylinder 12, and the two ends of the tool seat 13 are both provided with the two-position two-way switch valve 33, so as to facilitate control. Of course, the two-position two-way switch valve 33 is provided to facilitate the control and test of the one-way regulating valve, and when the regulating valve installed in the tool seat 13 is a two-way regulating valve, the two-position two-way switch valve 33 may be omitted, and the tool seat 13 is directly communicated with the test hydraulic cylinder 12 without a switch valve in the middle. And a flow meter is also arranged between the tool seat 13 and the testing hydraulic cylinder 12.
The tool sealing element is also connected with an oil receiving container, so that base oil can flow back to the oil tank when the damping regulating valve of the tested part is replaced, the whole test table is prevented from being dirty and messy, and the cleanness of the table is effectively kept.
The test hydraulic cylinder 12 and the tool holder 13 may be installed in one incubator 11, and the temperature sensing element 30 is installed on the incubator 11. The temperature in the incubator 11 can be monitored in real time by using the temperature detection element 30, so that the environment where the regulating valve is located is always in a more appropriate temperature environment when the regulating valve is tested, the temperature of the regulating valve is generally not changed, and the accuracy of test data is ensured.
Also connected to the test cylinder 12 is a tank assembly comprising a test circuit tank 19, a first test oil pipe 21, a second test oil pipe 22, a refill pipe and a test circuit refill tank 34. The test loop oil tank 19 is communicated with the rod cavity 124 through a first test oil pipe 21, the test loop oil tank 19 is communicated with the rodless cavity 125 through a second test oil pipe 22, the first test oil pipe 21 and the second test oil pipe 22 are both provided with a stop valve 20 and an electromagnetic proportional overflow valve 31, and the test loop oil supplement tank 34 is communicated with the second test oil pipe 22 through an oil supplement pipe.
The test loop oil supplementing tank 34 is communicated with the body 123 of the rodless cavity 125, an electromagnetic proportional overflow valve 31 and a check valve 23 are arranged between the test loop oil supplementing tank 34 and the rodless cavity 125, and the check valve 23 enables liquid to enter the rodless cavity 125 only along the test loop oil supplementing tank 34. The make-up tubing is also provided with a check valve 23. the check valve 23 allows fluid to enter the test circuit make-up tank 34 only along the second test tubing 22.
A liquid level meter 24 is connected to the cylinder 121, and the liquid level meter 24 detects the oil level in the cylinder 121. During the process of filling oil into the cylinder 121, the condition of the oil in the cylinder 121 can be timely grasped by the level gauge 24.
The device for testing the internal characteristic of the damping regulating valve under the condition of reducing the working condition of the shock absorber is tested as follows:
1. oil filling: the two stop valves 20 are opened, the oil supplementing pump fills the two cavities of the rod cavity 124 and the rodless cavity 125 of the asymmetric cylinder 121, the oil filling condition is known through the liquid level meter 24, the oil filling is stopped (the stop valves 20 are closed) after the oil filling is completed, at the moment, oil pumped by the oil supplementing pump flows into the oil supplementing tank 34 of the test circuit through the electromagnetic proportion overflow valve 31, and the electromagnetic proportion overflow valve 31 can be adjusted in real time.
2. Compression testing: when the compression motion of the hydraulic cylinder 12 is tested (the piston rod 122 moves downwards), the pressure value of the rodless cavity 125 is increased, the pressure value of the rod cavity 124 is reduced, high-pressure oil in the rodless cavity 125 flows into the rod cavity 124 through a damping regulating valve in the bypass tool seat 13, the flow value of the damping regulating valve of the tested part and the pressure values at two ends under different temperature values and different pwm program-controlled current values are monitored, and then characteristic curves (I current value, P differential pressure value, Q flow value and T medium oil temperature value) of the damping regulating valve IPQT are tested; meanwhile, considering that the oil flowing out of the rodless chamber 125 is more than the acceptable oil flowing into the rod chamber 124 during compression due to the piston rod 122 in the rod chamber 124, the electromagnetic proportional relief valve 31 is set in real time, and the electromagnetic proportional relief valve 31 on the first test oil pipe 21 is set to a lower value during compression, so that the redundant oil in the rod chamber 124 can be overflowed into the test circuit oil tank 19 (and the pressure value of the rod chamber 124 during compression can be controlled in real time).
3. And (3) recovery test: when the test hydraulic cylinder 12 is in the recovery motion (the piston rod 122 moves upwards), the pressure value of the rod cavity 124 is increased, the electromagnetic proportional overflow valve 31 is set to be a higher value at the moment, high-pressure oil in the rod cavity 124 is prevented from overflowing from the electromagnetic proportional overflow valve 31 into the test loop oil tank 19, the increased pressure value of the volume 123 of the rodless cavity 125 is reduced, the high-pressure oil in the rodless cavity 125 flows into the rodless cavity 125 through the damping regulating valve in the bypass tool seat 13, the flow values flowing through the damping regulating valve of the tested piece and the pressure values at two ends under different pwm program control current values under different temperature values are monitored at the moment, and further the characteristic curves (I current value, P pressure difference value, Q flow value and T medium oil temperature value) of the damping regulating valve IPQT are tested; meanwhile, considering that the rod is provided in the rod chamber 124, when in recovery, the oil flowing out of the rod chamber 124 is less than the acceptable oil flowing into the rodless chamber 125, the electromagnetic proportional relief valve 31 on the second test oil pipe 22 is set in real time, and the stop valve 20 is opened, so that the oil replenishment pump can replenish medium oil to the rodless chamber 125, and the phenomenon of gap oil shortage in the rodless chamber 125 is prevented (the value of the electromagnetic proportional relief valve 31 is set in real time, and the effect of controlling the pressure value of the rodless chamber 125 in real time is achieved).
The device for testing the internal characteristic of the damping regulating valve for reducing the working condition of the shock absorber disclosed by the embodiment is used for obtaining the proportional curve of the regulating valve in the following way:
oil filling preparation stage: firstly, a piston rod 122 of an asymmetric cylinder body 121 in a test loop is moved to the uppermost end, then an electromagnetic switch valve is opened to charge oil to the asymmetric cylinder body 121, an electromagnetic proportional overflow valve 31 on a second test oil pipe 22 is adjusted to a high pressure value such as 250bar in an oil charging stage, meanwhile, the electromagnetic proportional overflow valve 31 on a first test oil pipe 21 is adjusted to a low pressure value such as 0.5bar, when flow passes through a flowmeter, it can be judged that the asymmetric cylinder body 121 is filled with oil, when the oil is filled, the electromagnetic switch valve is closed, at the moment, the oil pumped by an oil supplementing pump flows out into a test loop oil tank 19 through a throttle valve, the oil supplementing pump is always in a working state, and a constant discharge value of the oil supplementing pump is calculated under the limit working condition of the maximum flow of 100L/min.
(II) piston rod 122 compression phase test:
P-I test: by using the driving structure to drive the piston rod 122 to move at a constant speed, the flow rate Q is constant. The electromagnetic proportional overflow valve 31 on the second test oil pipe 22 is adjusted to a high pressure value, such as 250bar, and the electromagnetic proportional overflow valve 31 on the first test oil pipe 21 is adjusted to a low pressure value, such as 0bar or 0.5 bar. The current input device 17 is electrified towards the tool seat 13, and the difference value delta P of the two ends of the tested piece under different current values I can be obtained by changing the current value I (wherein the difference value delta P is obtained by the pressure difference detection element 18 (using the data value when the value is less than or equal to 138 bar) or the difference value obtained by the pressure detection element (using the data value when the value is less than or equal to 138bar and less than or equal to 200 bar)). Wherein the electromagnetic proportional relief valve 31 on the second test oil pipe 22 also has the function of overload protection of the compression chamber (the rodless chamber 125), and the electromagnetic proportional relief valve 31 on the first test oil pipe 21 returns the oil overflowing the piston rod 122 into the test loop oil tank 19 during the compression stroke.
P-Q test: the current I output by the current input device 17 is constant, and the speed of the piston rod 122 in the asymmetric cylinder 121 is controlled by driving loop position closed-loop feedback control (at this time, the piston rod 122 is made to have different speed values which sequentially change from small to large, and the flow Q is an independent variable). The electromagnetic proportional overflow valve 31 on the second test oil pipe 22 is adjusted to a high pressure value, such as 250bar, and the electromagnetic proportional overflow valve 31 on the first test oil pipe 21 is adjusted to a low pressure value, such as 0bar or 0.5 bar. In this case, the differential pressure value Δ P across the measured control valve at different flow rate values Q can be obtained (wherein the differential pressure value Δ P is obtained by the differential pressure detecting element 18 (using this data value when 138 bar. ltoreq. 138 bar) or the differential pressure value obtained by the pressure detecting element (using this data value when 138 bar. ltoreq. Δ P. ltoreq. 200 bar), and the independent variable flow rate value Q is obtained by the flow meter). Wherein the electromagnetic proportional relief valve 31 on the second test oil pipe 22 also has the function of overload protection of the compression chamber (the rodless chamber 125), and the electromagnetic proportional relief valve 31 on the first test oil pipe 21 returns the oil overflowing the piston rod 122 into the test loop oil tank 19 during the compression stroke.
Q-I test: (the main premise is that a fixed differential pressure value delta P of two cavities of the testing cylinder body 121 is established), a plurality of groups of P-Q curves under different current values I are tested, and the Q-I curves can be obtained after data processing in the later period.
(III) piston rod 122 recovery phase test:
P-I test: the drive loop position is closed loop feedback controlled to control the velocity of the piston rod 122 in the asymmetric cylinder 121 (when a constant velocity is given to the piston rod 122, the flow Q is constant). The electromagnetic proportional overflow valve 31 on the first test oil pipe 21 is adjusted to a high pressure value, such as 250bar, and the electromagnetic proportional overflow valve 31 on the second test oil pipe 22 is adjusted to a low pressure value, such as 1 bar. The difference value DeltaP between the two ends of the tested piece under different current values I can be obtained by changing the current value I (wherein the difference value DeltaP is obtained by the pressure difference detection element 18 (the data value is used when the value is less than or equal to 138 bar) or the difference value is obtained by the pressure detection element (the data value is used when the value is less than or equal to 138bar and less than or equal to 200 bar)). Wherein the electromagnetic proportional relief valve 31 on the first test oil pipe 21 also has the effect of restoring chamber (having rod chamber 124) overload protection, and the test in the stage of restoring is in order to prevent the vacuum phenomenon from appearing in compression chamber (no rod chamber 125), opens the electromagnetic switch valve promptly when piston rod 122 is pulled up, makes the oil supplementing pump mend oil to compression chamber (no rod chamber 125), annotates: the oil supplementing pump is always in a working state, and the constant discharge value of the oil supplementing pump is obtained by calculation under the limit working condition of the maximum flow of 100L/min.
P-Q test: the current I output by the current input device 17 is constant, and the speed of the piston rod 122 in the asymmetric cylinder 121 is controlled by driving loop position closed-loop feedback control (at this time, the piston rod 122 is made to have different speed values which sequentially change from small to large, and the flow Q is an independent variable). The electromagnetic proportional overflow valve 31 on the first test oil pipe 21 is adjusted to a high pressure value, such as 250bar, and the electromagnetic proportional overflow valve 31 on the second test oil pipe 22 is adjusted to a low pressure value, such as 1 bar. In this case, the differential pressure value Δ P across the test piece at different flow rate values Q can be obtained (wherein the differential pressure value Δ P is obtained by the differential pressure measuring element 18 (using this data value for 138 bar. ltoreq. 138 bar) or by the difference value obtained by the pressure measuring element (using this data value for 138 bar. ltoreq. Δ P. ltoreq. 200 bar), and the independent variable flow rate value Q is obtained by the flow meter 28.1). Wherein the electromagnetism proportional relief valve 31 on the second test oil pipe 22 also has the effect of playing compression chamber (no pole chamber 125) overload protection, restores the stage test in order to prevent the compression chamber vacuum phenomenon from appearing, opens the electromagnetic switch valve promptly when piston rod 122 is pulled up, makes the oil supplementing pump mend oil to the compression chamber, notes: the oil supplementing pump is always in a working state, and the constant discharge value of the oil supplementing pump is obtained by calculation under the limit working condition of the maximum flow of 100L/min.
P-I test: (the main premise is that a fixed differential pressure value delta P of two cavities of the testing cylinder body 121 is established), a plurality of groups of P-Q curves under different current values I are tested, and the Q-I curves can be obtained after data processing in the later period.
In some embodiments of this embodiment, the drive structure includes a drive circuit oil tank 25, an oil return line 26, an oil outlet line 27, a three-position, five-way reversing valve 28, and a drive hydraulic cylinder 29. The driving loop oil tank 25 is connected with the P valve port of the three-position five-way reversing valve 28 through the oil outlet pipe 27, the driving loop oil tank 25 is connected with the T valve port of the three-position five-way reversing valve 28 through the oil return pipe 26, the valve port A and the valve port B of the three-position five-way reversing valve 28 are respectively communicated with two ends of the driving hydraulic cylinder 29, and the driving hydraulic cylinder 29 is in transmission connection with the piston rod 122.
Example 2:
referring to fig. 7 to 10, the present embodiment also discloses a damping control valve internal characteristic test device for reducing the working condition of the shock absorber, the present embodiment is a further improvement on the basis of the technical solution of embodiment 1, the technical solution described in embodiment 1 is also applicable to the present embodiment, and the technical solution disclosed in embodiment 1 is not described again.
Specifically, the present embodiment is different from embodiment 1 in that the driving structure disclosed in the present embodiment is an electro-hydraulic servo actuator 32, and the electro-hydraulic servo actuator 32 is in transmission connection with the piston rod 122. A servo actuator: the servo control device is an actuating element in an electro-hydraulic servo system, and the speed, the direction, the displacement and the force of a load are controlled by applying controllable pushing, pulling and other acting forces on the load. The servo actuator is composed of an electro-hydraulic servo valve, an actuating cylinder and a detection element.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A damping governing valve internal characteristic test equipment of reduction shock absorber operating mode which characterized in that includes:
a drive structure;
the test hydraulic cylinder comprises a cylinder body and a piston rod, the piston rod is connected with the cylinder body in a sliding mode, and the piston rod is in transmission connection with the driving structure;
the two ends of the tool seat are respectively communicated with the two ends of the cylinder body;
the current input device is electrically connected with the tool seat;
a first pressure sensing element mounted between the drive structure and the piston rod for measuring pressure between the drive structure and the piston rod;
a displacement detecting element for measuring a displacement amount of the piston rod; and
and the second pressure detection element is used for measuring the oil pressure of the tool seat.
2. The apparatus for testing the characteristics of a damping control valve in a reducing vibration absorber according to claim 1, wherein said cylinder block includes a chamber, said piston rod divides said chamber into a rod chamber and a rodless chamber which are independent of each other, and said second pressure detecting element measures the pressure in said rod chamber.
3. The apparatus for testing the internal characteristics of a damping regulation valve for reducing the operating conditions of a shock absorber according to claim 2, further comprising a tank assembly communicating with the rod chamber and the rodless chamber, respectively.
4. The apparatus for testing the internal characteristics of a damping regulating valve under the reducing vibration absorber working condition according to claim 3, wherein the oil tank assembly comprises a test loop oil tank, a first test oil pipe, a second test oil pipe, a compensation oil pipe and a test loop compensation oil tank, the test loop oil tank is communicated with the rod cavity through the first test oil pipe, the test loop oil tank is communicated with the rodless cavity through the second test oil pipe, a stop valve and an electromagnetic proportional overflow valve are arranged on each of the first test oil pipe and the second test oil pipe, and the test loop compensation oil tank is communicated with the second test oil pipe through the compensation oil pipe.
5. The device for testing the internal characteristics of the damping regulating valve under the reducing vibration absorber working condition according to claim 4, wherein the test loop oil supplementing tank is communicated with the rodless cavity, an electromagnetic proportional overflow valve and a check valve are arranged between the test loop oil supplementing tank and the rodless cavity, and the check valve enables liquid to enter the rodless cavity only along the test loop oil supplementing tank;
and the oil supplementing pipe is also provided with a one-way valve, and the one-way valve enables liquid to enter the test loop oil supplementing tank only along the second test oil pipe.
6. The apparatus for testing the characteristics of the inside of a damping control valve for reducing the operating conditions of a shock absorber according to claim 2, further comprising a differential pressure detecting element, wherein both ends of the differential pressure detecting element are respectively used for measuring the pressure in the rod chamber and the rod-less chamber.
7. The apparatus for testing the internal characteristics of a damping regulating valve under the reducing vibration absorber working condition according to claim 1, further comprising an incubator and a temperature detecting element, wherein the cylinder body is located in the incubator, and the temperature detecting element is connected between the cylinder body and the tool seat.
8. The apparatus for testing the internal characteristics of a damping regulating valve under the reducing vibration damper working condition according to claim 1, comprising a connecting member and at least two testing hydraulic cylinders, wherein the cylinder bodies in the at least two testing hydraulic cylinders are arranged side by side, rod cavities between two adjacent cylinder bodies are communicated with each other, rod-free cavities between two adjacent cylinder bodies are communicated with each other, all the piston rods are connected with the connecting member, and the connecting member is in transmission connection with the driving knot.
9. The apparatus for testing the internal characteristics of a damping regulating valve under the reducing vibration absorber working condition according to any one of claims 1 to 8, wherein the driving structure comprises a driving loop oil tank, an oil return pipe, an oil outlet pipe, a three-position five-way reversing valve and a driving hydraulic cylinder, the driving loop oil tank is connected with a P valve port of the three-position five-way reversing valve through the oil outlet pipe, the driving loop oil tank is connected with a T valve port of the three-position five-way reversing valve through the oil return pipe, a valve port A and a valve port B of the three-position five-way reversing valve are respectively communicated with two ends of the driving hydraulic cylinder, and the driving hydraulic cylinder is in transmission connection with the piston rod.
10. The apparatus for testing the internal characteristics of a damping regulating valve under the working condition of a reducing shock absorber according to any one of claims 1 to 8, wherein the driving structure comprises an electro-hydraulic servo actuator, and the electro-hydraulic servo actuator is in transmission connection with the piston rod.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115059720A (en) * | 2022-05-13 | 2022-09-16 | 江苏徐工工程机械研究院有限公司 | Rear suspension vibration buffer control system of tractor and tractor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115059720A (en) * | 2022-05-13 | 2022-09-16 | 江苏徐工工程机械研究院有限公司 | Rear suspension vibration buffer control system of tractor and tractor |
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