CN105223976A - A kind of pressure regulation control system - Google Patents
A kind of pressure regulation control system Download PDFInfo
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- CN105223976A CN105223976A CN201510728566.0A CN201510728566A CN105223976A CN 105223976 A CN105223976 A CN 105223976A CN 201510728566 A CN201510728566 A CN 201510728566A CN 105223976 A CN105223976 A CN 105223976A
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Abstract
The invention provides a kind of pressure regulation control system, its innovative point is: comprise negative-pressure container, negative pressure transducer, servo pressure device and solenoid valve pneumatic valve group, described negative pressure transducer comprises the first negative pressure transducer and the second negative pressure transducer, this first negative pressure transducer is electrically connected with negative-pressure container, and the second negative pressure transducer is electrically connected with servo pressure device; Described negative-pressure container is connected with servo pressure device by solenoid valve pneumatic valve group.By the record of negative pressure transducer and reaction, by piston, the gas in any vessel cavity can be pumped out automatically, form negative pressure space; And by the negative pressure value stability contorting in cavity within the specific limits, can meet experimental situation negative pressure value being had to requirement.
Description
Technical field
The present invention relates to pressure measurement control technology field, particularly relate to a kind of pressure regulation control system.
Background technology
Pressure is one of basic value of mechanics metering field.And the measurement of liquid high pressure has now been widely used in the fields such as Aeronautics and Astronautics, boats and ships, petroleum prospecting as the pith of pressure test, also important role is play in civilian industry is as process industries such as auto industrys, along with the proposition of field calibration technology, high-pressure calibration testing requirement is more and more extensive.Each high voltage power system of national defense industry and the safety monitoring system of high pressure vessel all will use high tension instrument, in order to ensure the security of these field research and production work, need to carry out periodic detection and calibration to these high tension instruments, whether accurate data are directly affects research and production, affect completing smoothly of weapon model, this just has higher requirement to the metering of liquid high pressure, except liquid high pressure calibrating installation meets the accuracy index needed for the transmission of quantity value specified in pressure measurement utensil national measurement verification system table in performance index, also wanting can be quick, automatically complete pressure calibration work.
Under high pressure have higher control accuracy, this pressure controling mode is all utilize one end of piston to compress the fluid be enclosed in piston cylinder at present, thus reaches pressure controlled object.Thisly utilize that piston is single-ended carries out pressure controlled method, result in and in high pressure range, to carry out pressure when regulating, high-voltage oil liquid in cavity volume can produce very large axial thrust to relief piston, and this thrust can act directly in kinematic train, considerably increases the load of kinematic train.Such as Chinese patent CN103017976A discloses a kind of back-pressure balance formula liquid high pressure pressure adjustment assembly, it is characterized in that: comprise pneumatically powered hydraulic pump (24), control stop valve (25), balance stop valve (26), pressure duct (27), pressure transducer (28), test port (29), ball screw assembly, (30), turbine worm reducer (31), servomotor (32), back-pressure balance formula regulating device (33); After servomotor (32), turbine worm reducer (31), ball screw assembly, (30), back-pressure balance formula regulating device (33) connect successively, back-pressure balance formula regulating device (33) is connected with pressure transducer (28) by pipeline; Pneumatically powered hydraulic pump is connected by pipeline with back-pressure balance formula regulating device (33), middle by controlling stop valve (25), balance stop valve (26) regulable control; Test port (29) is drawn by pressure duct, for connecting tested high-tension apparatus between pressure transducer (28) front end and back-pressure balance formula regulating device (33); This technical scheme, solves the capacity Pressure Control Technology problem that the axial thrust of fluid high-pressure to piston is large in actual high-voltage use procedure, realizes the light fine adjustment of high-pressure.But because condition needs, also may need the setting carrying out negative pressure value, this technical scheme can't realize at present.
For another example Chinese patent CN201944025U discloses a kind of press machine controller (10), for controlled pressure machinery (30), this press (30) has the servomotor (41) that reducing gear portion (37) that the position reduction gear ratio via corresponding slide block (38) carries out changing drives slide block (38), press machine controller (10) has: command generation unit (20), generates at least one in the position command of servomotor, speed command and torque instruction; Vibration command generation unit (13), generates vibration instruction according to the parameter preset for press machine controller; Slide position test section (12), detects the position of slide block; And vibration instruction adds portion (21,22,23), to the some additional vibration instruction in the position command of servomotor, speed command and torque instruction during in the position of slide block within the limits prescribed.Thus, even if make press stop when slide block is positioned at bottom dead centre, also again can be started by little torque.This technical scheme gives and utilizes press to move, and realizes the regulating and controlling of pressure, but the program realizes controlling slide block by the change of slide block reduction gear ratio, and then drives the servomotor of slide block, and then ensures the existence of pressure.
But, generally speaking, current pressure tracking system lacks perfect control system, can not set negative pressure or malleation value flexibly, needs change negative pressure value or this function of malleation value size in experimentation can not be met, cavity internal pressure can not be controlled in the temperature environment of a change.Therefore, need to be further improved to solve problems of the prior art.
Summary of the invention
Changing negative pressure value or this function of malleation value size for overcoming the needs in experimentation that can not meet existed in prior art, the problem of cavity internal pressure can not be controlled in the temperature environment of a change, the invention provides a kind of pressure regulation control system.
The technical solution used in the present invention is: a kind of pressure regulation control system, its innovative point is: comprise negative-pressure container, negative pressure transducer, servo pressure device and solenoid valve pneumatic valve group, described negative pressure transducer comprises the first negative pressure transducer and the second negative pressure transducer, this first negative pressure transducer is electrically connected with negative-pressure container, and the second negative pressure transducer is electrically connected with servo pressure device; Described negative-pressure container is connected with servo pressure device by solenoid valve pneumatic valve group.
On this basis, described solenoid valve pneumatic valve group comprises gas admittance valve and air outlet valve, and this gas admittance valve one end is connected with the first negative pressure transducer, and the other end is connected with air outlet valve by the second negative pressure transducer.
On this basis, described servo pressure device comprises propulsion system, pressure control device and support; Be installed with pressure control device above this support, described propulsion system are connected with pressure control device, realize the Power output of pressure control device.
On this basis, described propulsion system comprise servomotor, reductor and shaft coupling, and the output terminal of described servomotor is connected with the input end of reductor, and this reductor is connected with pressure control device by shaft coupling.
On this basis, described pressure control device arranges a lifter housing, comprise successively from top to bottom in described lifter housing piston, ball screw, worm screw, in establish turbo-turbine box and guide plate, described guide plate is laterally fixed on lifter housing, and this guide plate is fixedly connected with in the middle of ball screw, bottom is vertical; Worm gear in described turbine box is flexibly connected ball-screw by key, and the top of this ball-screw is connected with piston; Described worm screw is connected by gear with turbine, and worm screw realizes driving turbine to rotate.
On this basis, described servomotor output terminal is connected with worm screw by after reductor and shaft coupling.
On this basis, described piston is provided with wear-resistant guiding ring and seal assembly, described wear-resistant guiding ring is anchored on piston, and described seal assembly is embedded in top land.
On this basis, described seal assembly is combination sealing arrangement, from left to right be followed successively by delta seal pad, sealing O type circle, nylon back-up ring, lip seal pad and lip back-up ring, described lip back-up ring coordinates fixing with lip seal pad, nylon back-up ring coordinates fixing with lip seal pad; Described nylon back-up ring, lip seal pad and lip back-up ring are fixedly connected with delta seal pad by sealing O type circle after fixing successively.
On this basis, described seal assembly is provided with 1 ~ 3.
On this basis, described shaft coupling two ends are also provided with mounting hole, and described mounting hole is provided with linear bearing, realize the guiding of upper and lower rectilinear motion.
Compared with prior art, the invention has the beneficial effects as follows:
(1) pressure regulation control system of the present invention, by the record of negative pressure transducer and reaction, can be pumped out the gas in any vessel cavity by piston automatically, forms negative pressure space; And by the negative pressure value stability contorting in cavity within the specific limits, can meet experimental situation negative pressure value being had to requirement.
(2) pressure regulation control system of the present invention, comprise negative-pressure container, negative pressure transducer, servo pressure device and solenoid valve pneumatic valve group, worm screw is driven to rotate by servomotor, worm screw drives worm gear to rotate, worm gear connects ball-screw by key and moves up and down, ball-screw is connected with piston, drives piston to move up and down in cavity while ball-screw moves up and down, and can follow the tracks of negative pressure pressure size also can tracing control positive pressure pressure size; The negative pressure in cavity is followed the tracks of in real-time monitoring, without the need to guard, meets the operational requirements of experimental facilities.
(3) pressure regulation control system of the present invention, possesses perfect control system, negative pressure or malleation value can be set flexibly, meet needs change negative pressure value or this function of malleation value size in experimentation, and cavity internal pressure can be controlled in the temperature environment of a change, gas in a cavity is extracted out and forms negative pressure, and the negative pressure value of setting needs can be monitored in real time.
(4) pressure regulation control system of the present invention, piston is provided with wear-resistant guiding ring and seal assembly, and wear-resistant guiding ring is anchored on piston, mutually compresses during work, seal group integrally.Seal assembly is embedded in top land, seal assembly is combination sealing arrangement, from left to right be followed successively by delta seal pad, sealing O type circle, nylon back-up ring, lip seal pad and lip back-up ring, lip back-up ring coordinates fixing with lip seal pad, nylon back-up ring coordinates fixing with lip seal pad; Nylon back-up ring, lip seal pad and lip back-up ring are fixedly connected with delta seal pad by sealing O type circle after fixing successively, seal compact, are conducive to the quick formation of negative pressure.
Accompanying drawing explanation
Fig. 1 is pressure regulation control system overall schematic of the present invention;
Fig. 2 is the overall vertical view of pressure regulation control system of the present invention;
Fig. 3 is seal assembly schematic diagram in pressure regulation control system of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The embodiment for a kind of pressure regulation control system of the present invention as shown in Figure 1, 2, comprise negative-pressure container 3, negative pressure transducer, servo pressure device and solenoid valve pneumatic valve group, negative pressure transducer comprises the first negative pressure transducer 1 and the second negative pressure transducer 2, this first negative pressure transducer 1 is electrically connected with negative-pressure container 3, and the second negative pressure transducer 2 is electrically connected with servo pressure device; Negative-pressure container is connected with servo pressure device by solenoid valve pneumatic valve group.Gas in any vessel cavity by the record of negative pressure transducer and reaction, can be pumped out by piston by the present embodiment automatically, forms negative pressure space; And by the negative pressure value stability contorting in cavity within the specific limits, can meet experimental situation negative pressure value being had to requirement.
As shown in Figure 1: solenoid valve pneumatic valve group comprises gas admittance valve 4 and air outlet valve 5, this gas admittance valve 4 one end is connected with the first negative pressure transducer 1, and the other end is connected with air outlet valve 5 by after the second negative pressure transducer 2; Servo pressure device comprises propulsion system, pressure control device and support 10; Be installed with pressure control device above this support 10, propulsion system are connected with pressure control device, realize the Power output of pressure control device.
As shown in Figure 1: propulsion system comprise servomotor 12, reductor 11 and shaft coupling 13, the output terminal of servomotor 12 is connected with the input end of reductor 11, and this reductor 11 is connected with pressure control device by shaft coupling 13.
As shown in Figure 1, 2: pressure control device arranges a lifter housing 100, comprise successively from top to bottom in lifter housing 100 piston 6, ball screw 7, worm screw 14, in be provided with turbine box 8 and the guide plate 9 of turbine 15, guide plate 9 is laterally fixed on lifter housing 100, and this guide plate 9 is fixedly connected with the middle bottom of ball screw 7 is vertical; Worm gear 15 in turbine box 8 is flexibly connected ball-screw 7 by key, and the top of this ball-screw 7 is connected with piston 6; Worm screw 14 is connected by gear with turbine 15, and worm screw 14 realizes driving turbine 15 to rotate, and servomotor 12 output terminal is connected with worm screw 14 by reductor 11 and shaft coupling 13 are rear.The present invention drives worm screw to rotate by servomotor, and worm screw drives worm gear to rotate, and worm gear connects ball-screw by key and moves up and down, and ball-screw is connected with piston, drives piston to move up and down in cavity while ball-screw moves up and down.
Preferred as the present embodiment, the piston 6 of the present embodiment is provided with wear-resistant guiding ring and seal assembly, and wear-resistant guiding ring is anchored on piston 6, and seal assembly is embedded in piston 6 top.
As shown in Figure 3: seal assembly is combination sealing arrangement, from left to right be followed successively by delta seal pad 101, sealing O type circle 102, nylon back-up ring 103, lip seal pad 104 and lip back-up ring 105, lip back-up ring 105 coordinates fixing with lip seal pad 104, nylon back-up ring 103 coordinates fixing with lip seal pad 104; Nylon back-up ring 103, lip seal pad 104 and lip the back-up ring 105 successively fixing rear sealing O type circle 102 that passes through are fixedly connected with delta seal pad 101.During work, seal assembly compresses mutually, seal group integrally, seals compact, is conducive to the quick formation of negative pressure.
As the present embodiment further preferably, seal assembly is provided with 1 ~ 3.
As the present embodiment further preferably, shaft coupling 13 two ends are also provided with mounting hole, and mounting hole is provided with linear bearing, realize the guiding of upper and lower rectilinear motion.
When the device of the present embodiment works, power source is provided by servomotor, servomotor connects lifter housing housing after connecting reductor, servomotor running drives reductor running, after through reductor, one or more levels slows down, lifter housing housing is driven servomotor torque to be amplified and the motion that reductor rotates be converted to the motion of the straight line up and down of ball screw in lifter housing, the ball screw of lifter housing promotes piston by shaft coupling, piston moves up and down, lifter housing output terminal serial connection negative pressure transducer, detect output pressure by negative pressure transducer and feed back to computing machine and form clossing pressure control loop.
When reducing negative pressure in negative-pressure container, first gas admittance valve (the numerical values recited automatic decision by the first negative pressure transducer) is opened, close air outlet valve, piston is driven to move down by controlling servomotor rotating forward, increase piston superjacent air space size, thus the negative pressure in negative-pressure container is reduced.
When increasing negative pressure in negative-pressure container, first gas admittance valve (the numerical values recited automatic decision by the first negative pressure transducer) is opened, close air outlet valve, piston is driven to move up by controlling servomotor reversion, increase piston superjacent air space size, thus the negative pressure in negative-pressure container is increased.
Can make control rate by servomotor, positional precision is very accurate, voltage signal can be converted into torque and rotational speed with drived control object.Servo motor rotor rotating speed controls by input signal, and energy rapid reaction, in automatic control system, as executive component, and there is the characteristics such as electromechanical time constant is little, the linearity is high, pickup voltage, received electric signal can be converted to the angular displacement on motor reel or angular velocity output.
Above-mentioned explanation illustrate and describes the preferred embodiments of the present invention, as previously mentioned, be to be understood that the present invention is not limited to the form disclosed by this paper, should not regard the eliminating to other embodiments as, and can be used for other combinations various, amendment and environment, and can in invention contemplated scope described herein, changed by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change do not depart from the spirit and scope of the present invention, then all should in the protection domain of claims of the present invention.
Claims (10)
1. a pressure regulation control system, it is characterized in that: comprise negative-pressure container (3), negative pressure transducer, servo pressure device and solenoid valve pneumatic valve group, described negative pressure transducer comprises the first negative pressure transducer (1) and the second negative pressure transducer (2), this first negative pressure transducer (1) is electrically connected with negative-pressure container (3), and the second negative pressure transducer (2) is electrically connected with servo pressure device; Described negative-pressure container is connected with servo pressure device by solenoid valve pneumatic valve group.
2. pressure regulation control system according to claim 1, it is characterized in that: described solenoid valve pneumatic valve group comprises gas admittance valve (4) and air outlet valve (5), this gas admittance valve (4) one end is connected with the first negative pressure transducer (1), and the other end is connected with air outlet valve (5) by the second negative pressure transducer (2).
3. pressure regulation control system according to claim 1, is characterized in that: described servo pressure device comprises propulsion system, pressure control device and support (10); This support (10) top is installed with pressure control device, and described propulsion system are connected with pressure control device, realize the Power output of pressure control device.
4. pressure regulation control system according to claim 3, it is characterized in that: described propulsion system comprise servomotor (12), reductor (11) and shaft coupling (13), the output terminal of described servomotor (12) is connected with the input end of reductor (11), and this reductor (11) is connected with pressure control device by shaft coupling (13).
5. pressure regulation control system according to claim 3, it is characterized in that: described pressure control device arranges a lifter housing (100), comprise successively from top to bottom in described lifter housing (100) piston (6), ball screw (7), worm screw (8), in be provided with turbine box (8) and the guide plate (9) of turbine (15), described guide plate (9) is laterally fixed on lifter housing (100), and this guide plate (9) is fixedly connected with in the middle of ball screw (7), bottom is vertical; Worm gear (15) in described turbine box (8) is flexibly connected ball-screw (7) by key, and the top of this ball-screw (7) is connected with piston (6); Described worm screw (8) is connected by gear with turbine (15), and worm screw (8) realizes driving turbine (15) to rotate.
6. pressure regulation control system according to claim 3, is characterized in that: described servomotor (12) output terminal is connected with worm screw (8) with shaft coupling (13) afterwards by reductor (11).
7. pressure regulation control system according to claim 5, it is characterized in that: (6) are provided with wear-resistant guiding ring and seal assembly to described piston, described wear-resistant guiding ring is anchored on piston (6), and described seal assembly is embedded in piston (6) top.
8. pressure regulation control system according to claim 7, it is characterized in that: described seal assembly is combination sealing arrangement, from left to right be followed successively by delta seal pad (101), sealing O type circle (102), nylon back-up ring (103), lip seal pad (104) and lip back-up ring (105), described lip back-up ring (105) coordinates fixing with lip seal pad (104), nylon back-up ring (105) coordinates fixing with lip seal pad (104); Described nylon back-up ring (105), lip seal pad (104) and lip back-up ring (105) are fixedly connected with delta seal pad (101) by sealing O type circle (102) after fixing successively.
9. the pressure regulation control system according to claim 7 or 8, is characterized in that: described seal assembly is provided with 1 ~ 3.
10. pressure regulation control system according to claim 1, is characterized in that: described shaft coupling (13) two ends are also provided with mounting hole, and described mounting hole is provided with linear bearing, realize the guiding of upper and lower rectilinear motion.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510728566.0A CN105223976A (en) | 2015-10-30 | 2015-10-30 | A kind of pressure regulation control system |
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| CN201510728566.0A CN105223976A (en) | 2015-10-30 | 2015-10-30 | A kind of pressure regulation control system |
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| CN105223976A true CN105223976A (en) | 2016-01-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108121375A (en) * | 2016-11-30 | 2018-06-05 | 北京航天计量测试技术研究所 | A kind of twin-stage high-pressure gas pressure precise adjustment-control device and method |
| CN110757878A (en) * | 2019-10-31 | 2020-02-07 | 济宁科力光电产业有限责任公司 | Pressure fault detection system and method of servo press |
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| CN103089749A (en) * | 2013-01-29 | 2013-05-08 | 洛阳摩科工贸有限公司 | Portable intelligent hydraulic loading device |
| CN205263667U (en) * | 2015-10-30 | 2016-05-25 | 南通市飞宇石油科技开发有限公司 | Pressure regulation control system |
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Patent Citations (8)
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| US4700561A (en) * | 1986-02-24 | 1987-10-20 | Dougherty Steven J | Apparatus for measuring entrained gas-phase content in a liquid |
| CN1734144A (en) * | 2004-08-02 | 2006-02-15 | Smc株式会社 | Vacuum regulating valve |
| CN101915700A (en) * | 2010-07-29 | 2010-12-15 | 大连理工大学 | Non-outflow type gas pressure/volume control device |
| CN102133729A (en) * | 2011-01-06 | 2011-07-27 | 清华大学 | Pressure control system for CMP (Chemical Mechanical Polishing) head |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108121375A (en) * | 2016-11-30 | 2018-06-05 | 北京航天计量测试技术研究所 | A kind of twin-stage high-pressure gas pressure precise adjustment-control device and method |
| CN110757878A (en) * | 2019-10-31 | 2020-02-07 | 济宁科力光电产业有限责任公司 | Pressure fault detection system and method of servo press |
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Application publication date: 20160106 |