CN201749375U - Servo hydraulic pressure control device - Google Patents
Servo hydraulic pressure control device Download PDFInfo
- Publication number
- CN201749375U CN201749375U CN2010202351194U CN201020235119U CN201749375U CN 201749375 U CN201749375 U CN 201749375U CN 2010202351194 U CN2010202351194 U CN 2010202351194U CN 201020235119 U CN201020235119 U CN 201020235119U CN 201749375 U CN201749375 U CN 201749375U
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- servo
- water
- control device
- pressure control
- valve
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Abstract
The utility model provides a servo hydraulic pressure control device, which effectively solves the problem that the precision of an existing pressure stabilizing valve is low, and ensures the pressure is controlled stably. The technical scheme is as follows: the servo hydraulic pressure control device comprises a servo hydraulic pump unit, and is characterized in that the servo hydraulic pressure control device also comprises an electro-hydraulic servo valve and a servo high pressure oil displacing water device. The servo hydraulic pump unit is connected with the electro-hydraulic servo valve. The electro-hydraulic servo valve is connected with the servo high pressure oil displacing water device. The servo high pressure oil displacing water device is connected with a test container through a control module. The electro-hydraulic servo valve and the control module are respectively connected with a control system in an electric control way.
Description
Technical field
The utility model relates to the control device technical field, is specially a kind of servo water pressure control device, and it is mainly used in the pressure test to closed container.
Background technology
Usually when carrying out pressure test for a closed container,, adopt high-pressure hydraulic pump to pour into the high pressure tap water and test as rocket's fuel tanks is carried out pressure test, usually adopt the pressure maintaining valve controlled pressure, because the pressure maintaining valve poor sensitivity, precision is low, therefore has the problem of pressure control shakiness.
Summary of the invention
At the problems referred to above, the utility model provides a kind of servo water pressure control device, and it can effectively solve the low problem of pressure maintaining valve precision in the past, guarantees pressure controlled stability.
Its technical scheme is such, it comprises the servo-hydraulic pumping plant, it is characterized in that: it also comprises electrohydraulic servo valve and servo high-pressure oil expelling water device, described servo-hydraulic pumping plant connects described electrohydraulic servo valve, described electrohydraulic servo valve connects described servo high-pressure oil expelling water device, described servo high-pressure oil expelling water device connects test chamber by control module, and described electrohydraulic servo valve, control module electricly connect with control system respectively.
It is further characterized in that: described servo high-pressure oil expelling water device comprises hydraulic fluid chamber and water cavity; Described hydraulic fluid chamber and water cavity are separated by the piston on the piston rod; Described hydraulic fluid chamber and water cavity include symmetrical two; Described two hydraulic fluid chambers are positioned at the two ends of described servo high-pressure oil expelling water device; Described water cavity is positioned at the inboard of described hydraulic fluid chamber; Described electrohydraulic servo valve connects described hydraulic fluid chamber by pipeline; Described water cavity connects inlet pipeline and described test chamber by retaining valve respectively; Between described water cavity and the described test chamber control module is installed also; Described control module comprises accumulator and pressure transducer.
The beneficial effects of the utility model are: it sends feedback pressure signal in real time by the pressure transducer on the control module and gives control system, is realized the precision of system pressure is controlled the control accuracy height by control system control servo-hydraulic valve.
Description of drawings
Fig. 1 is a kind of servo water pressure control device system principle synoptic diagram of the present utility model.
Embodiment
See Fig. 1, it comprises servo-hydraulic pumping plant 22, electrohydraulic servo valve 15 and servo high-pressure oil expelling water device 16, servo-hydraulic pumping plant 22 connects electrohydraulic servo valve 15, electrohydraulic servo valve 15 connects servo high-pressure oil expelling water device 16, servo high-pressure oil expelling water device 16 connects test chamber 24 by control module 23, and electrohydraulic servo valve 15, control module 23 electricly connect with control system respectively.Servo high-pressure oil expelling water device 16 comprises hydraulic fluid chamber and water cavity; Hydraulic fluid chamber and water cavity are separated by the piston on the piston rod 33 29; Hydraulic fluid chamber and water cavity include symmetrical two, left hydraulic fluid chamber 25, left water cavity 26, right water cavity 27, right hydraulic fluid chamber 28; The two ends of the servo high-pressure oil expelling water device 16 that two hydraulic fluid chambers 25,28 are positioned at; Water cavity 26,27 is positioned at the inboard of hydraulic fluid chamber 25,28; Electrohydraulic servo valve 15 pipelines connect hydraulic fluid chamber 25,28; Water cavity 24,27 connects inlet pipeline, outlet valve 32 connection test chambers 24 by water intaking valve 17 respectively; Between water cavity 26,27 and the test chamber 24 control module 23 is installed also; Control module 23 comprises accumulator 18 and pressure transducer 23.Among Fig. 1, the servo-hydraulic pumping plant comprises that fuel tank 30,1 is a liquid level gauge, 2 is temperature sensor, and 3 is liquid level sensor, and 4 is the hydraulic pressure air cleaner, 5 is the inlet port filtrator, and 6 is oil pump, and 7 is motor, 8 is the precision pressure in-line filter, and 9 is retaining valve, and 10 is safety valve, 11 is electromagnetic relief valve, and 12 is pressure transducer, and 13 is pressure meter switch, 14 is tensimeter, and 21 is the direct returning type return filter.31 are tank from the beginning, and 20 is the switch water valve on the inlet pipeline.
Pressure oil is connected the hydraulic fluid chamber 25 of servo high-pressure oil expelling water device 16 by electrohydraulic servo valve 15,28, utilize oil pressure to promote the piston rod side-to-side movement, tap water enters the water cavity 26 of servo high-pressure oil expelling water device through switch water valve 21 and water intaking valve 17,27, when piston rod 33 moves right, water cavity 26 is split into press water and enters test chamber by outlet valve 32 outputs, when piston rod 33 during to left movement, water cavity 27 is split into press water by outlet valve 32 outputs, wherein hydraulic pressure is 1.64 with the hydraulic pressure ratio, press water enters test chamber through control module 23 after the stable and detected pressures, pressure transducer on the control module 23 sends feedback pressure signal in real time and gives control system, send instruction to electrohydraulic servo valve 15 according to system's needs by control system, thereby by regulate electrohydraulic servo valve 15 realize precision control to system pressure, its control accuracy can reach≤2%.
Claims (10)
1. servo water pressure control device, it comprises the servo-hydraulic pumping plant, it is characterized in that: it also comprises electrohydraulic servo valve and servo high-pressure oil expelling water device, described servo-hydraulic pumping plant connects described electrohydraulic servo valve, described electrohydraulic servo valve connects described servo high-pressure oil expelling water device, described servo high-pressure oil expelling water device connects test chamber by control module, and described electrohydraulic servo valve, control module electricly connect with control system respectively.
2. according to the described a kind of servo water pressure control device of claim 1, it is characterized in that: described servo high-pressure oil expelling water device comprises hydraulic fluid chamber and water cavity.
3. according to the described a kind of servo water pressure control device of claim 2, it is characterized in that: described hydraulic fluid chamber and water cavity are separated by the piston on the piston rod.
4. according to the described a kind of servo water pressure control device of claim 3, it is characterized in that: described hydraulic fluid chamber and water cavity include symmetrical two.
5. according to the described a kind of servo water pressure control device of claim 4, it is characterized in that: described two hydraulic fluid chambers are positioned at the two ends of described servo high-pressure oil expelling water device.
6. according to the described a kind of servo water pressure control device of claim 5, it is characterized in that: described water cavity is positioned at the inboard of described hydraulic fluid chamber.
7. according to claim 2 or 6 described a kind of servo water pressure control devices, it is characterized in that: described electrohydraulic servo valve connects described hydraulic fluid chamber by pipeline.
8. according to the described a kind of servo water pressure control device of claim 7, it is characterized in that: described water cavity connects inlet pipeline and described test chamber by retaining valve respectively.
9. described according to Claim 8 a kind of servo water pressure control device is characterized in that: between described water cavity and the described test chamber control module is installed also.
10. according to the described a kind of servo water pressure control device of claim 9, it is characterized in that: described control module comprises accumulator and pressure transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202351194U CN201749375U (en) | 2010-06-20 | 2010-06-20 | Servo hydraulic pressure control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202351194U CN201749375U (en) | 2010-06-20 | 2010-06-20 | Servo hydraulic pressure control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201749375U true CN201749375U (en) | 2011-02-16 |
Family
ID=43584046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202351194U Expired - Lifetime CN201749375U (en) | 2010-06-20 | 2010-06-20 | Servo hydraulic pressure control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201749375U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886647A (en) * | 2010-06-20 | 2010-11-17 | 无锡市海航电液伺服***有限公司 | Servo water pressure control device |
| CN103673784A (en) * | 2012-09-11 | 2014-03-26 | 北京精密机电控制设备研究所 | Hydraulic energy device of carrier rocket servo mechanism |
-
2010
- 2010-06-20 CN CN2010202351194U patent/CN201749375U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886647A (en) * | 2010-06-20 | 2010-11-17 | 无锡市海航电液伺服***有限公司 | Servo water pressure control device |
| CN101886647B (en) * | 2010-06-20 | 2012-07-04 | 无锡市海航电液伺服***股份有限公司 | Servo water pressure control device |
| CN103673784A (en) * | 2012-09-11 | 2014-03-26 | 北京精密机电控制设备研究所 | Hydraulic energy device of carrier rocket servo mechanism |
| CN103673784B (en) * | 2012-09-11 | 2016-01-27 | 北京精密机电控制设备研究所 | A kind of hydraulic energy device of carrier rocket servo mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110216 Effective date of abandoning: 20120704 |