CN201136302Y - Constant pressure compensating mechanism for oil press - Google Patents
Constant pressure compensating mechanism for oil press Download PDFInfo
- Publication number
- CN201136302Y CN201136302Y CNU2007200655920U CN200720065592U CN201136302Y CN 201136302 Y CN201136302 Y CN 201136302Y CN U2007200655920 U CNU2007200655920 U CN U2007200655920U CN 200720065592 U CN200720065592 U CN 200720065592U CN 201136302 Y CN201136302 Y CN 201136302Y
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- oil
- pressure
- oil pump
- ftercompction
- compensating
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Abstract
The utility model relates to a constant pressure compensator of an oil hydraulic press, which comprises an electro connecting pressure gauge connected with the main oil passage. The electro connecting pressure gauge is connected with the control module of the oil hydraulic press at the same time; one end of a two-position four-way electromagnetic directional valve connected with the control module is connected with a one-way valve and the other end is connected with a pressure-compensating oil pump; one end of a filter is arranged at the oil inlet of the pressure-compensating oil pump and the other end is inserted into an oil sink; a pressure-compensating motor is arranged on the pressure-compensating oil pump, and an overflow valve and an oil sink are connected with an oil passage between the pressure-compensating oil pump and the directional valve. The technical proposal that the electro connecting pressure gauge is directly connected with the main oil passage and the control module to conduct a pressure compensation to the main oil passage overcomes the defects in the prior art that the energy consumption is comparatively large, the oil temperature is easy to rise and the system sealing piece has a short service life due to a pressure-compensating method of adopting a continuously-running high-power main oil pump to meet the need of production. The constant pressure compensator of an oil hydraulic press is applicable to automatic pressure compensation to large-tonnage and medium-tonnage oil hydraulic presses in the continuous working process when the working pressure drops.
Description
Technical field
The utility model relates to a kind of constant pressure compensating mechanism for oil press, relates in particular to be used for big, tonnage hydraulic press and when operating pressure descends it to be carried out pressure compensated constant pressure compensating mechanism for oil press automatically in the continuous firing process.
Background technology
When existing hydraulic press was worked, when operating 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 hydraulic press itself and can not guarantee fully that its operating pressure do not leak at all, As time goes on, the operating pressure of hydraulic press will descend (general new equipment is per 10 minutes decline 2MPa), thus, be necessary for the hydraulic press ftercompction.At present, the method that solves the hydraulic 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 service life of main oil pump; The 3rd, the hydraulic fluid temperature of system is easy to raise, and has quickened the damage of whole system seal, has shortened the service life of seal.
Summary of the invention
At above-mentioned situation, the purpose of this utility model is to provide a kind of constant pressure compensating mechanism for oil press, it both can satisfy when big tonnage hydraulic press descends because of operating pressure in the continuous firing process can carry out pressure compensation automatically to it, can keep the constant normal operating pressure of hydraulic press again, and energy consumption reduces and prolongs the service 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 hydraulic press working connection, this electro connecting pressure gauge is connected with the control module of hydraulic 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 check valve of working connection, its other end is connected with the oil-out of ftercompction oil pump, one end of filter is loaded on the oil-in of ftercompction oil pump, the other end of filter 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 overflow valve and oil groove through three-way pipe.
The utility model adopts the working connection that electro connecting pressure gauge is directly connected in hydraulic 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 hydraulic 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 check 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, overflow valve is opened, the unnecessary pressure oil of ftercompction oil pump output flows back to the technical scheme of oil groove by overflow valve, it is bigger to have overcome the existing employing energy consumption that the high-power main oil pump of hydraulic 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 service life.
The beneficial effect that the utility model 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 running time of high-power main oil pump, has reduced energy consumption, has prolonged the service life of main oil pump; (2) overcome the defective that the hydraulic press hydraulic fluid temperature raises easily, prolonged the service life of system sealing spare.
It is suitable for greatly, the tonnage hydraulic press in the continuous firing process, when operating 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 utility model is described in further detail.
Description of drawings
Fig. 1 is constant pressure compensating mechanism for oil press structure of the present utility model and fundamental diagram.
Wherein 1, electro connecting pressure gauge, 2, solenoid directional control valve, 3, check valve, 4, the ftercompction oil pump, 5, the ftercompction motor, 6, filter, 7, oil groove, 8, overflow valve.
The specific embodiment
Referring to Fig. 1, electro connecting pressure gauge 1 is directly connected in the working connection of hydraulic press, and be connected with the control module of hydraulic press simultaneously, check valve 3 one ends are connected with working connection, check 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, filter 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 hydraulic press simultaneously, on the oil circuit between ftercompction oil pump 4 and the two-position four-way solenoid directional control valve 2, connect overflow valve 3 and oil groove 7, to keep the desired operating pressure of system by three-way pipe.
The course of work of the present utility model: when the oil pressure of working connection is reduced to certain limit, electro connecting pressure gauge 1 sends signal to the hydraulic 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 filter 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 check valve carry out ftercompction.When the oil pressure of working connection rises to the hydraulic press service pressure, electro connecting pressure gauge 1 sends signal to the hydraulic 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, overflow valve 8 is opened, and the unnecessary pressure oil of ftercompction oil pump 4 outputs flows back to oil groove 7 through overflow valve 8.
Below only be preferred embodiment of the present utility model, according to above-mentioned design of the present utility model, 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 operating 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 utility model.
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 hydraulic press working connection, this electro connecting pressure gauge (1) is connected with the control module of hydraulic 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 check valve (3) of working connection, its other end is connected with the oil-out of ftercompction oil pump (4), one end of filter (6) is loaded on the oil-in of ftercompction oil pump (4), the other end of filter (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 overflow valve (8) and oil groove (7) through three-way pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200655920U CN201136302Y (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 |
|---|---|---|---|
| CNU2007200655920U CN201136302Y (en) | 2007-12-27 | 2007-12-27 | Constant pressure compensating mechanism for oil press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201136302Y true CN201136302Y (en) | 2008-10-22 |
Family
ID=40036991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200655920U Expired - Lifetime CN201136302Y (en) | 2007-12-27 | 2007-12-27 | Constant pressure compensating mechanism for oil press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201136302Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691698A (en) * | 2012-06-20 | 2012-09-26 | 苏州世力源科技有限公司 | Method for preventing hydraulic impact table oil source from raising temperature |
| CN105034443A (en) * | 2015-08-14 | 2015-11-11 | 中山市八达机器制造有限公司 | Pressure maintaining and pressure unloading stabilization ultralow speed oil press |
-
2007
- 2007-12-27 CN CNU2007200655920U patent/CN201136302Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691698A (en) * | 2012-06-20 | 2012-09-26 | 苏州世力源科技有限公司 | Method for preventing hydraulic impact table oil source from raising temperature |
| CN102691698B (en) * | 2012-06-20 | 2015-07-15 | 苏州世力源科技有限公司 | Method for preventing hydraulic impact table oil source from raising temperature |
| CN105034443A (en) * | 2015-08-14 | 2015-11-11 | 中山市八达机器制造有限公司 | Pressure maintaining and pressure unloading stabilization ultralow speed oil press |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: JIANGNAN INDUSTRIES GROUP CO., LTD. Free format text: FORMER NAME: JIANGNAN MACHINERY (GROUP) CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Bamboo town Yuhu District 411207 Hunan city of Xiangtan Province Patentee after: Jiangnan Industries Group Co., Ltd. Address before: Bamboo Jiangnan Machine Yuhu District 411207 in Hunan province Xiangtan city (Group) Co. Ltd. Patentee before: Jiangnan Machinery (Group) Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20081022 |
|
| CX01 | Expiry of patent term |