CN220396177U - Servo valve dynamic performance test hydraulic cylinder - Google Patents
Servo valve dynamic performance test hydraulic cylinder Download PDFInfo
- Publication number
- CN220396177U CN220396177U CN202321917325.7U CN202321917325U CN220396177U CN 220396177 U CN220396177 U CN 220396177U CN 202321917325 U CN202321917325 U CN 202321917325U CN 220396177 U CN220396177 U CN 220396177U
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- servo
- cylinder body
- cylinder
- vibrator
- servo valve
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- 238000011056 performance test Methods 0.000 title claims abstract description 15
- 210000004907 gland Anatomy 0.000 claims abstract description 29
- 238000006073 displacement reaction Methods 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims description 5
- 238000012360 testing method Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 230000004044 response Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model relates to the technical field of servo valves and discloses a servo valve dynamic performance test hydraulic cylinder which comprises a servo cylinder body, wherein a right gland is arranged on the right side surface of the servo cylinder body, a sensor protection cover is arranged on the right side surface of the right gland, a speed-displacement sensor is arranged at the middle end of the right side surface of the right gland in a penetrating way, and the bottom surface of the servo cylinder body is connected with a servo dynamic cylinder mounting seat. When the tested servo valve acts, pressure oil enters from an inlet of an oil way A, pressure oil on the other side flows back to an oil tank from an oil way B, at the moment, a vibrator moves rightwards, the vibration frequency of the vibrator depends on the acting frequency of the tested servo valve, the position of a magnetic ring at the tail end is continuously changed relative to a speed-displacement sensor in the continuous movement process of the vibrator, the position of the magnetic ring at the tail end is detected by the speed-displacement sensor, and whether the performance of the servo dynamic cylinder meets the dynamic characteristic test of the tested servo valve is judged by comparing with the acting curve of the tested servo valve, so that the dynamic performance test of the servo valve is finished.
Description
Technical Field
The utility model relates to the technical field of servo valves, in particular to a hydraulic cylinder for testing dynamic performance of a servo valve.
Background
The dynamic performance test of the servo valve is an important content in the test work of the hydraulic element, and the dynamic cylinder used in the dynamic test of the servo valve is a key sensor of the test system, and the dynamic characteristic of the dynamic cylinder directly influences the accuracy degree of the test result.
Because the dynamic characteristic of the servo valve itself requires that the servo valve has very high frequency response which can reach 100Hz, the servo dynamic cylinder also meets the characteristic, so that the vibrator of the servo dynamic cylinder has extremely high sensitivity, and the natural frequency of the servo dynamic cylinder is higher than 600Hz, so that the requirements on the selection of materials used by the servo dynamic cylinder, the processing precision, the design and the manufacture of a heat treatment process and the like are very high, and the maintenance cost and the research and development cost are relatively high.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the utility model provides the hydraulic cylinder for testing the dynamic performance of the servo valve, which has the advantages of convenience in detection and the like, and solves the technical problems.
(II) technical scheme
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a servo valve dynamic performance test pneumatic cylinder, includes servo cylinder body, servo cylinder body left side is connected with left gland, servo cylinder body inner wall middle-end is connected with the cylinder liner, cylinder liner inner wall swing joint has the oscillator, oscillator right side middle-end is sunken, and the middle-end is connected with antimagnetic gasket, antimagnetic gasket right side is connected with the magnetic ring, servo cylinder body right flank installs right gland, right gland right flank installs the sensor protection casing, speed-displacement sensor is installed to right gland right flank middle-end through-type, servo cylinder body bottom surface is connected with servo dynamic cylinder mount pad.
As a preferable technical scheme of the utility model, the left gland is integrated with the servo cylinder body through a high-strength connecting screw, and the right gland is integrated with the servo cylinder body through the high-strength connecting screw.
As the preferable technical scheme of the utility model, the antimagnetic gasket is fixedly arranged on the side surface of the vibrator, and the magnetic ring is attached to the antimagnetic gasket.
As the preferable technical scheme of the utility model, the cylinder sleeve is fixedly arranged on the inner wall of the servo cylinder body, the left gland, the servo cylinder body and the right gland form a cavity to be divided into two areas by the vibrator with the movable inner wall, and the vibrator and the cylinder sleeve are in clearance fit.
As a preferable technical scheme of the utility model, an oil way A and an oil way B are arranged at the top of the outer end surface of the servo cylinder body, the oil way A is conducted to the left side area of the vibrator, and the oil way B is conducted to the right side area of the vibrator.
As the preferable technical scheme of the utility model, a sealing ring is arranged between the cylinder sleeve and the servo cylinder body, and the joint of the left gland and the right gland and the servo cylinder body is respectively provided with the sealing ring.
Compared with the prior art, the utility model provides the servo valve dynamic performance test hydraulic cylinder, which has the following beneficial effects:
1. according to the utility model, when the tested servo valve acts to enable pressure oil to enter from an inlet of the oil way A, the pressure oil on the other side flows back to the oil tank from the oil way B, at the moment, the vibrator moves rightwards, when the tested servo valve acts to enable the pressure oil to enter from the oil way B, the opposite side pressure oil flows back to the oil tank through the tested servo valve of the oil way A, the vibrator moves leftwards, the vibration frequency of the vibrator depends on the vibration frequency of the tested servo valve, along with the continuous change of the vibration frequency of the tested servo valve, the vibrator has to respond correspondingly, the response speed and the position of the vibrator are monitored and output in real time through the speed-displacement sensor, the position of the magnetic ring at the tail end of the vibrator is changed continuously relative to the speed-displacement sensor in the continuous movement process of the vibrator, and then the position of the magnetic ring is detected by the speed-displacement sensor, and then the servo dynamic cylinder performance meets the dynamic characteristic test of the tested servo valve through comparison with the motion curve of the tested servo valve, and thus the dynamic performance test of the servo valve is completed, the whole operation is more convenient, and the dynamic performance of the servo valve can be tested and analyzed accurately.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model.
Wherein: 1. a left gland; 2. a servo cylinder; 3. a vibrator; 4. cylinder sleeve; 5. an antimagnetic gasket; 6. a magnetic ring; 7. a right gland; 8. a speed-displacement sensor; 9. a sensor shield; 10. a servo dynamic cylinder mounting seat; 11. an oil path A; 12. and an oil path B.
Detailed Description
Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.
In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, a hydraulic cylinder for testing dynamic performance of a servo valve comprises a servo cylinder body 2, wherein a servo valve connecting bottom plate is arranged on the servo cylinder body 2 and is used for installing the servo valve to be tested, a left gland 1 is connected to the left side of the servo cylinder body 2, a cylinder sleeve 4 is connected to the middle end of the inner wall of the servo cylinder body 2, a vibrator 3 is movably connected to the inner wall of the cylinder sleeve 4, the middle end of the right side of the vibrator 3 is sunken, the middle end of the vibrator is connected with an antimagnetic gasket 5, the right side of the antimagnetic gasket is connected with a magnetic ring 6, a right gland 7 is installed on the right side of the servo cylinder body 2, a sensor protection cover 9 is installed on the right side of the right gland 7, a speed-displacement sensor 8 is installed on the middle end of the right side of the right gland 7 in a penetrating mode, a servo cylinder body 2 bottom surface is connected with a servo dynamic cylinder installation seat 10, one surface of the servo dynamic cylinder installation seat 10 is fixed on the servo cylinder body 2 through a high-strength screw, and the other surface is fixed on a frame through a screw.
Further, when the tested servo valve acts to enable pressure oil to enter from the inlet of the oil way A11, the pressure oil on the other side flows back to the oil tank from the oil way B12, at the moment, the vibrator 3 moves rightwards, when the tested servo valve acts to enable pressure oil to enter from the oil way B12, the opposite side pressure oil flows back to the oil tank through the tested servo valve of the oil way A11, the vibrator 3 moves leftwards, the vibration frequency of the vibrator 3 depends on the vibration frequency of the tested servo valve, along with the continuous change of the vibration frequency of the tested servo valve, the vibrator 3 has to simultaneously respond correspondingly, the response speed and the position of the vibrator are monitored and output in real time through the speed-displacement sensor 8, the position of the magnetic ring 6 at the tail end of the vibrator is continuously changed relative to the speed-displacement sensor 8, and then the vibrator is detected by the speed-displacement sensor 8, and then whether the performance of the servo dynamic cylinder meets the dynamic characteristic test of the tested servo valve is judged through comparison with the motion curve of the tested servo valve, and then the dynamic performance test of the servo valve is finished.
Furthermore, a sealing ring is arranged between the cylinder sleeve 4 and the servo cylinder body 2, so that the phenomenon of crosstalk caused by pressure between the two chambers of the oil path A11 and the oil path B12 can be effectively avoided.
Furthermore, the servo cylinder body 2 must have sufficient rigidity and strength, the deformation amount capable of bearing the high pressure of 35MPa is minimum, the light weight of the vibrator 3 is ensured, the requirements of the vibrator on the machining precision, the form and position tolerance and the like of the outer surface matched with the inner hole of the cylinder sleeve 4 are fully ensured, the vibrator 3 vibrates in the cylinder sleeve 4 under the action of pressure oil at high frequency, the vibration frequency is up to 100Hz, and the machining precision, the form and position tolerance and the heat treatment process of the inner hole of the cylinder sleeve 4 are as same as those of the vibrator 3, so that the requirement of high-frequency vibration is met.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a servo valve dynamic performance test pneumatic cylinder, includes servo cylinder body (2), its characterized in that: the servo cylinder body (2) left side is connected with left gland (1), servo cylinder body (2) inner wall middle-end is connected with cylinder liner (4), cylinder liner (4) inner wall swing joint has vibrator (3), vibrator (3) right side middle-end is sunken, and the middle-end is connected with antimagnetic gasket (5), antimagnetic gasket right side is connected with magnetic ring (6), servo cylinder body (2) right flank installs right gland (7), right gland (7) right flank installs sensor protection casing (9), speed-displacement sensor (8) are installed to right gland (7) right flank middle-end through-type, servo cylinder body (2) bottom surface is connected with servo dynamic cylinder mount pad (10).
2. The servo valve dynamic performance test cylinder of claim 1, wherein: the left gland (1) and the servo cylinder body (2) are integrated through a high-strength connecting screw, and the right gland (7) and the servo cylinder body (2) are integrated through a high-strength connecting screw.
3. The servo valve dynamic performance test cylinder of claim 1, wherein: the anti-magnetic gasket (5) is fixedly arranged on the side face of the vibrator (3), and the magnetic ring (6) is attached to the anti-magnetic gasket (5).
4. The servo valve dynamic performance test cylinder of claim 1, wherein: the cylinder sleeve (4) is fixedly arranged on the inner wall of the servo cylinder body (2), the left gland (1), the servo cylinder body (2) and the right gland (7) form a cavity to be divided into two areas through the vibrator (3) with the movable inner wall, and the vibrator (3) and the cylinder sleeve (4) are in clearance fit.
5. The servo valve dynamic performance test cylinder of claim 4, wherein: an oil way A (11) and an oil way B (12) are arranged at the top of the outer end face of the servo cylinder body (2), the oil way A (11) is conducted to the left side area of the vibrator (3), and the oil way B (12) is conducted to the right side area of the vibrator (3).
6. The servo valve dynamic performance test cylinder of claim 1, wherein: a sealing ring is arranged between the cylinder sleeve (4) and the servo cylinder body (2), and sealing rings are respectively arranged at the joints of the left gland (1) and the right gland (7) and the servo cylinder body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321917325.7U CN220396177U (en) | 2023-07-20 | 2023-07-20 | Servo valve dynamic performance test hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321917325.7U CN220396177U (en) | 2023-07-20 | 2023-07-20 | Servo valve dynamic performance test hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220396177U true CN220396177U (en) | 2024-01-26 |
Family
ID=89612892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321917325.7U Active CN220396177U (en) | 2023-07-20 | 2023-07-20 | Servo valve dynamic performance test hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220396177U (en) |
-
2023
- 2023-07-20 CN CN202321917325.7U patent/CN220396177U/en active Active
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