CN101470448A - Constant pressure compensating mechanism for oil press - Google Patents
Constant pressure compensating mechanism for oil press Download PDFInfo
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- CN101470448A CN101470448A CNA2007103034090A CN200710303409A CN101470448A CN 101470448 A CN101470448 A CN 101470448A CN A2007103034090 A CNA2007103034090 A CN A2007103034090A CN 200710303409 A CN200710303409 A CN 200710303409A CN 101470448 A CN101470448 A CN 101470448A
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- oil
- pressure
- oil pump
- pressure compensating
- ftercompction
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Abstract
A constant pressure compensating device of a hydraulic machine comprises an electric contact pressure gauge connected to a main oil channel, wherein the electric contact pressure gauge is simultaneously connected with a control module of the hydraulic machine, one end of a two-position four-way electromagnetic reversing valve which is connected with the control module is connected with a one-way valve, the other end is connected with a pressure compensating oil pump, one end of a filter is mounted at an oil inlet of the pressure compensating oil pump, the other end is in socket joint with an oil tank, a pressure compensating motor is mounted on the pressure compensating oil pump, and a relief valve and the oil tank are connected to the oil channel between the pressure compensating oil pump and the reversing valve. By the technical scheme of directly connecting the electric contact pressure gauge to the main oil channel and the control module to compensate the main oil channel, defects of high energy consumption, easy increased oil temperature, short service life of system sealing elements and the like in the existing pressure compensating method of utilizing a continuous operated high power main oil pump to meet requirements of production. The constant pressure compensating device is adaptable to automatically compensating pressure for large and medium tonnage hydraulic machines when working pressure is reduced during the continuous working process.
Description
Technical field
The present invention relates to a kind of constant pressure compensating mechanism for oil press, relate in particular to and be used for big, tonnage oil press and when working pressure descends, it carried out pressure compensated constant pressure compensating mechanism for oil press automatically in the continuous firing process.
Background technology
When existing oil press was worked, when working pressure reached setting value, main oil pump can be out of service.But, also deposit factor such as sealing because of the hydraulic system of oil press itself and can not guarantee fully that its working pressure do not leak at all, As time goes on, the working pressure of oil press will descend (general new equipment is per 10 minutes decline 2MPa), thus, be necessary for the oil press ftercompction.At present, the method that solves the oil press ftercompction is that the continuous running of its main oil pump is not shut down, to meet the needs of production.But this pressurize mode has following several big shortcoming: the one, waste energy, because the power of main oil pump is generally all bigger; The 2nd, have a strong impact on serviceable life of main oil pump; The 3rd, the hydraulic fluid temperature of system is easy to raise, and has quickened the damage of total system seal, has shortened the serviceable life of seal.
Summary of the invention
At above-mentioned situation, the object of the present invention is to provide a kind of constant pressure compensating mechanism for oil press, it both can satisfy when big tonnage oil press descends because of working pressure in the continuous firing process can carry out pressure compensation automatically to it, can keep the constant normal working pressure of oil press again, and energy consumption reduces and prolongs the serviceable life of main oil pump and system sealing spare.
To achieve these goals, a kind of constant pressure compensating mechanism for oil press, it comprises the electro connecting pressure gauge that is connected in the oil press working connection, this electro connecting pressure gauge is connected with the control module of oil press simultaneously, the two-position four-way solenoid directional control valve that is connected with this control module, the one end is connected with the retaining valve of working connection, its other end is connected with the oil-out of ftercompction oil pump, one end of filtrator is loaded on the oil-in of ftercompction oil pump, the other end of filtrator directly is plugged in oil groove, the ftercompction motor is installed on the ftercompction oil pump, on the oil circuit between ftercompction oil pump and the two-position four-way solenoid directional control valve, is connected surplus valve and oil groove through three-way pipe.
The present invention adopts the working connection that electro connecting pressure gauge is directly connected in oil press, oil pressure to working connection is monitored, when the oil pressure of working connection is reduced to certain limit, electro connecting pressure gauge sends signal to the oil press control module, control module is sent the ftercompction signal to the two-position four-way solenoid directional control valve immediately, at this moment, the two-position four-way solenoid directional control valve is opened, and pressure oil carries out ftercompction by two-position four-way solenoid directional control valve and retaining valve to working connection; When the oil pressure of working connection reaches service pressure, electro connecting pressure gauge sends signal to control module, control module is sent to the two-position four-way solenoid directional control valve and is stopped the ftercompction signal, at this moment, the two-position four-way solenoid directional control valve cuts out, surplus valve is opened, the unnecessary pressure oil of ftercompction oil pump output flows back to the technical scheme of oil groove by surplus valve, it is bigger to have overcome the existing employing energy consumption that the high-power main oil pump of oil press exists with the ftercompction method of satisfy producing needs that turns round continuously, hydraulic fluid temperature raises easily, defectives such as system sealing spare weak point in serviceable life.
The beneficial effect that the present invention is produced compared to existing technology:
(1) flow of ftercompction oil pump has only 1/10th of main oil pump, and the power of ftercompction motor also has only 1/10th of main oil pump motor power, thereby has significantly reduced the working time of high-power main oil pump, has reduced energy consumption, has prolonged the serviceable life of main oil pump; (2) overcome the defective that the oil press hydraulic fluid temperature raises easily, prolonged the serviceable life of system sealing spare.
It is suitable for greatly, the tonnage oil press in the continuous firing process, when working pressure descends, can carry out pressure compensated constant pressure compensating mechanism for oil press automatically to it.
Below in conjunction with drawings and Examples the present invention is described in further detail.
Description of drawings
Fig. 1 is constant pressure compensating mechanism for oil press structure of the present invention and fundamental diagram.
Wherein 1, electro connecting pressure gauge, 2, solenoid directional control valve, 3, retaining valve, 4, the ftercompction oil pump, 5, the ftercompction motor, 6, filtrator, 7, oil groove, 8, surplus valve.
Embodiment
Referring to Fig. 1, electro connecting pressure gauge 1 is directly connected in the working connection of oil press, and be connected with the control module of oil press simultaneously, retaining valve 3 one ends are connected with working connection, retaining valve 3 other ends are connected in two-position four-way solenoid directional control valve 2, the hydraulic oil of assurance system can not pass back into the ftercompction loop, ftercompction motor 5 is installed on ftercompction oil pump 4, filtrator 6 one ends are loaded on the oil-in of ftercompction oil pump 4, the other end directly is plugged in oil groove 7, for guaranteeing the cleaning of hydraulic system, need the hydraulic oil by ftercompction oil pump 4 is filtered.The oil-out of ftercompction oil pump 4 is connected in two-position four-way solenoid directional control valve 2, two-position four-way solenoid directional control valve 2 is connected by the control module of control line and oil press simultaneously, on the oil circuit between ftercompction oil pump 4 and the two-position four-way solenoid directional control valve 2, connect surplus valve 3 and oil groove 7, to keep the desired working pressure of system by three-way pipe.
The course of work of the present invention: when the oil pressure of working connection is reduced to certain limit, electro connecting pressure gauge 1 sends signal to the oil press control module, control module is assigned the ftercompction signal to two-position four-way solenoid directional control valve 2 immediately, two-position four-way solenoid directional control valve 2 is opened at this moment, because it is in running order always that ftercompction motor 5 drives ftercompction oil pump 4, hydraulic oil filters the back from oil groove 7 sucking-offs by filtrator 6, after 4 pressurizations of ftercompction oil pump, pressure oil by the two-position four-way electromagnetism change 2 and 3 pairs of working connections of retaining valve carry out ftercompction.When the oil pressure of working connection rises to the oil press service pressure, electro connecting pressure gauge 1 sends signal to the oil press control module, control module is assigned to two-position four-way solenoid directional control valve 2 immediately and is stopped the ftercompction signal, two-position four-way solenoid directional control valve 2 cuts out at this moment, surplus valve 8 is opened, and the unnecessary pressure oil of ftercompction oil pump 4 outputs flows back to oil groove 7 through surplus valve 8.
Below only be preferred embodiment of the present invention, according to above-mentioned design of the present invention, those skilled in the art also can make various modifications and conversion to this.For example, modification and the conversion of adopting the high and low pressure sensor working pressure in pressure oil loop to be monitored in conjunction with control module.Yet similar this conversion and modification all belong to essence of the present invention.
Claims (1)
1, a kind of constant pressure compensating mechanism for oil press, it is characterized in that it comprises the electro connecting pressure gauge (1) that is connected in the oil press working connection, this electro connecting pressure gauge (1) is connected with the control module of oil press simultaneously, the two-position four-way solenoid directional control valve (2) that is connected with this control module, the one end is connected with the retaining valve (3) of working connection, its other end is connected with the oil-out of ftercompction oil pump (4), one end of filtrator (6) is loaded on the oil-in of ftercompction oil pump (4), the other end of filtrator (6) directly is plugged in oil groove (7), go up installation ftercompction motor (5) at ftercompction oil pump (4), on the oil circuit between ftercompction oil pump (4) and the two-position four-way solenoid directional control valve (2), connect surplus valve (8) and oil groove (7) through three-way pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103034090A CN101470448A (en) | 2007-12-27 | 2007-12-27 | Constant pressure compensating mechanism for oil press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103034090A CN101470448A (en) | 2007-12-27 | 2007-12-27 | Constant pressure compensating mechanism for oil press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101470448A true CN101470448A (en) | 2009-07-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007103034090A Pending CN101470448A (en) | 2007-12-27 | 2007-12-27 | Constant pressure compensating mechanism for oil press |
Country Status (1)
| Country | Link |
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| CN (1) | CN101470448A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286199A (en) * | 2015-06-11 | 2017-01-04 | 哈尔滨飞机工业集团有限责任公司 | A kind of hydraulic pressure voltage supply equipment |
| CN108120601A (en) * | 2017-12-20 | 2018-06-05 | 华中科技大学 | A kind of alcohol consumes instrument fuel-flow control system |
| CN111758206A (en) * | 2018-02-28 | 2020-10-09 | 赛峰电气与电源公司 | Coolant system |
-
2007
- 2007-12-27 CN CNA2007103034090A patent/CN101470448A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286199A (en) * | 2015-06-11 | 2017-01-04 | 哈尔滨飞机工业集团有限责任公司 | A kind of hydraulic pressure voltage supply equipment |
| CN108120601A (en) * | 2017-12-20 | 2018-06-05 | 华中科技大学 | A kind of alcohol consumes instrument fuel-flow control system |
| CN111758206A (en) * | 2018-02-28 | 2020-10-09 | 赛峰电气与电源公司 | Coolant system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090701 |