CN219317291U - Servo pump control hydraulic valve group structure - Google Patents
Servo pump control hydraulic valve group structure Download PDFInfo
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- CN219317291U CN219317291U CN202320295614.1U CN202320295614U CN219317291U CN 219317291 U CN219317291 U CN 219317291U CN 202320295614 U CN202320295614 U CN 202320295614U CN 219317291 U CN219317291 U CN 219317291U
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Abstract
The utility model belongs to the technical field of hydraulic machines, and discloses a servo pump control hydraulic valve group structure which comprises an oil cylinder and a quantitative gear pump driven by a servo motor, wherein the quantitative gear pump is connected with an oil tank, a first oil way is connected between an oil inlet of the quantitative gear pump and a lower cavity of the oil cylinder, a second oil way is connected between an oil outlet of the quantitative gear pump and an upper cavity of the oil cylinder, a liquid filling valve is arranged between the oil cylinder and the oil tank, a first electromagnetic reversing valve and a second electromagnetic reversing valve are arranged between the first oil way and the second oil way, a third electromagnetic reversing valve is arranged between the first electromagnetic reversing valve and the second electromagnetic reversing valve, the third electromagnetic reversing valve is communicated with a liquid filling valve pipeline, a high-pressure filter is arranged between the second electromagnetic reversing valve and the quantitative gear pump, and the high-pressure filter is provided with a first pressure gauge.
Description
Technical Field
The utility model belongs to the technical field of hydraulic machines, and particularly relates to a servo pump control hydraulic valve group structure.
Background
Hydraulic presses are machines that use liquid as the working medium for transferring energy to achieve various processes. The hydraulic press can be used for correcting, press fitting, packaging, briquetting, pressing plates and the like besides being used for forging and forming. The working flow of the hydraulic machine can be divided into basic action flows of quick-down, slow-down, work-in, slow-up, quick-up and the like, so that the movement direction and speed of the oil cylinder need to be controlled and regulated.
Dynamic hydraulic technology characteristics in the current market: one class is: the electromagnetic proportional valve is controlled, the weight of the piston, the piston rod and the upper die is utilized to fall rapidly during operation, the hydraulic valve is utilized to switch and control to be converted into slow speed and work, then the hydraulic valve is lifted, and in order to realize the speed controllability in the descending and lifting processes, the proportional valve or the servo valve is generally adopted to control the operation speed of the oil cylinder by the control valve; the two kinds are as follows: the bidirectional pump system is characterized in that an oil cylinder cavity and a rodless cavity of an oil cylinder are respectively connected with two oil outlets of a pump station, the up-and-down motion of the oil cylinder is realized through the forward and backward rotation of a motor, and the speed regulation is realized through the regulation of the rotating speed;
however, at present, the two technical schemes have certain disadvantages, such as high cost of the proportional valve and the bidirectional pump element, are not applicable to large-tonnage presses, and further have the problem of low precision control.
Disclosure of Invention
In view of the above-mentioned problems with the background art, the present utility model has as its object: aims at providing a servo pump control hydraulic valve group structure.
In order to achieve the technical purpose, the utility model adopts the following technical scheme:
the utility model provides a servo pump accuse hydraulic pressure valves structure, includes the hydro-cylinder and by servo motor driven ration gear pump, ration gear pump is connected with the oil tank, the oil inlet of ration gear pump with be connected with first oil circuit between the lower chamber of hydro-cylinder, the oil-out of ration gear pump with be connected with the second oil circuit between the upper chamber of hydro-cylinder, the hydro-cylinder with install the charge valve between the oil tank, first oil circuit with install first electromagnetic reversing valve and second electromagnetic reversing valve between the second oil circuit, first electromagnetic reversing valve with install the third electromagnetic reversing valve between the second electromagnetic reversing valve, the third electromagnetic reversing valve with charge valve pipeline intercommunication, the second electromagnetic reversing valve with install high pressure filter between the ration gear pump, the first manometer is installed to high pressure filter.
Further limited, the back pressure valve and the unloading valve are arranged between the first electromagnetic reversing valve and the oil cylinder on the first oil path, so that the back pressure valve plays roles in cutting off and throttling, and the unloading valve plays roles in realizing flow pressure adjustment, thereby achieving the purposes of loop control, prolonging the service life of the oil pump and reducing power consumption.
Further limited, be connected with the third oil circuit between second electromagnetic directional valve and the oil tank, the overflow valve is installed to the third oil circuit, and such design plays the protection to the third oil circuit, plays the purpose to high pressure filter constant flow moreover.
Further limited, the second manometer is installed to first oil circuit with the second oil circuit is all installed, and such design is convenient for observe pressure, monitors running state.
Further limited, the hydro-cylinder is installed at least to match, and this kind of design guarantees the normal use of valves structure.
The beneficial effects of the utility model are that:
by adopting the structural design of the utility model, the hydraulic principle is optimized, high-cost elements such as a proportional reversing valve, a two-way pump and the like are saved, and the economical efficiency is better;
by adopting the structural design of the utility model, the oil cylinder is passively controlled in the descending process, thereby reducing the heating of oil liquid and reducing the energy consumption.
Drawings
The utility model can be further illustrated by means of non-limiting examples given in the accompanying drawings;
FIG. 1 is a schematic diagram of the connection of oil passages in an embodiment of a servo pump controlled hydraulic valve block structure according to the present utility model;
the main reference numerals are as follows:
an oil cylinder 1; a quantitative gear pump 2; an oil tank 3; a first oil passage 4; a second oil passage 5; a charging valve 6; a first electromagnetic directional valve 7; a second electromagnetic directional valve 8; a third electromagnetic directional valve 9; a high-pressure filter 10; a first pressure gauge 11; a back pressure valve 12; an unloading valve 13; a third oil passage 14; an overflow valve 15; a second pressure gauge 16.
Detailed Description
In order that those skilled in the art will better understand the present utility model, the following technical scheme of the present utility model will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1, the servo pump control hydraulic valve group structure comprises an oil cylinder 1 and a quantitative gear pump 2 driven by a servo motor, wherein the quantitative gear pump 2 is connected with an oil tank 3, a first oil way 4 is connected between an oil inlet of the quantitative gear pump 2 and a lower cavity of the oil cylinder 1, a second oil way 5 is connected between an oil outlet of the quantitative gear pump 2 and an upper cavity of the oil cylinder 1, a liquid filling valve 6 is arranged between the oil cylinder 1 and the oil tank 3, a first electromagnetic directional valve 7 and a second electromagnetic directional valve 8 are arranged between the first oil way 4 and the second oil way 5, a third electromagnetic directional valve 9 is arranged between the first electromagnetic directional valve 7 and the second electromagnetic directional valve 8, the third electromagnetic directional valve 9 is communicated with the liquid filling valve 6 through a pipeline, a high-pressure filter 10 is arranged between the second electromagnetic directional valve 8 and the quantitative gear pump 2, and the high-pressure filter 10 is provided with a first pressure gauge 11.
In the embodiment, when a servo pump is used for controlling a hydraulic valve group structure, in the descending process of an upper die of a hydraulic press, oil in a lower cavity of an oil cylinder 1 is discharged, passes through a first electromagnetic directional valve 7 and a second electromagnetic directional valve 8, then bypasses a high-pressure filter 10 to reach the high-pressure end of a quantitative gear pump 2, the quantitative gear pump 2 is used as a brake motor, at the moment, the servo motor controls the reversing speed of the pump of the quantitative gear pump 2 according to the requirement, and then the oil returns to an oil tank to realize the control of the descending speed of the oil cylinder 1, namely, the speed of the oil returns to the oil tank is slow under the effect of the quantitative gear pump 2, and the descending speed of the corresponding oil cylinder 1 is slow; when the oil cylinder 1 moves in other modes, the servo motor rotates positively, oil is discharged from the high-pressure end of the quantitative gear pump 2 and enters the upper cavity of the oil cylinder 1 through the second oil way 5, the action of the oil cylinder 1 can be controlled through the rotation speed control of the quantitative gear pump 2, and the filtering operation is realized through the high-pressure filter 10 at the moment.
Preferably, the back pressure valve 12 and the unloading valve 13 are arranged between the first electromagnetic directional valve 7 and the oil cylinder 1 on the first oil way 4, so that the back pressure valve 12 plays a role in cutting off and throttling, the unloading valve 13 plays a role in realizing flow pressure adjustment, the purposes of loop control, prolonging the service life of the oil pump and reducing the power consumption are achieved, and in fact, the mounting positions of the back pressure valve 12 and the unloading valve 13 can be considered according to specific situations.
Preferably, a third oil path 14 is connected between the second electromagnetic directional valve 8 and the oil tank 3, and an overflow valve 15 is installed in the third oil path 14, so that the third oil path is protected, the constant flow rate of the high-pressure filter 10 is achieved, and the installation position of the overflow valve 15 can be considered according to the specific situation.
The second pressure gauge 16 is preferably mounted on both the first oil passage 4 and the second oil passage 5, so that the pressure can be easily observed, the operation state can be monitored, and the selection and mounting position of the second pressure gauge 16 can be considered according to the specific situation.
Preferably, at least one oil cylinder 1 is arranged in a matching way, so that the normal use of the valve group structure is ensured, and in practice, the valve group structure can be also used for a two-cylinder and more multi-cylinder hydraulic press according to specific conditions, and multi-cylinder synchronization is realized by controlling the rotating speed of each motor.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims of this utility model, which are within the skill of those skilled in the art, can be made without departing from the spirit and scope of the utility model disclosed herein.
Claims (5)
1. The utility model provides a servo pump accuse hydraulic pressure valves structure, includes hydro-cylinder (1) and by servo motor driven ration gear pump (2), ration gear pump (2) are connected with oil tank (3), its characterized in that: the automatic quantitative oil pump is characterized in that a first oil way (4) is connected between an oil inlet of the quantitative gear pump (2) and a lower cavity of the oil cylinder (1), a second oil way (5) is connected between an oil outlet of the quantitative gear pump (2) and an upper cavity of the oil cylinder (1), a liquid filling valve (6) is installed between the oil cylinder (1) and the oil tank (3), a first electromagnetic reversing valve (7) and a second electromagnetic reversing valve (8) are installed between the first oil way (4) and the second oil way (5), a third electromagnetic reversing valve (9) is installed between the first electromagnetic reversing valve (7) and the second electromagnetic reversing valve (8), the third electromagnetic reversing valve (9) is communicated with the liquid filling valve (6) through a pipeline, a high-pressure filter (10) is installed between the second electromagnetic reversing valve (8) and the quantitative gear pump (2), and the high-pressure filter (10) is provided with a first pressure gauge (11).
2. A servo pump controlled hydraulic valve block structure as recited in claim 1, wherein: and a back pressure valve (12) and an unloading valve (13) are arranged between the first electromagnetic reversing valve (7) and the oil cylinder (1) on the first oil way (4).
3. A servo pump controlled hydraulic valve block structure as claimed in claim 2, wherein: a third oil way (14) is connected between the second electromagnetic reversing valve (8) and the oil tank (3), and an overflow valve (15) is arranged on the third oil way (14).
4. A servo pump controlled hydraulic valve block structure as recited in claim 3, wherein: and the first oil way (4) and the second oil way (5) are both provided with a second pressure gauge (16).
5. The servo pump controlled hydraulic valve block structure of claim 4, wherein: at least one oil cylinder (1) is arranged in a matching way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320295614.1U CN219317291U (en) | 2023-02-23 | 2023-02-23 | Servo pump control hydraulic valve group structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320295614.1U CN219317291U (en) | 2023-02-23 | 2023-02-23 | Servo pump control hydraulic valve group structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219317291U true CN219317291U (en) | 2023-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320295614.1U Active CN219317291U (en) | 2023-02-23 | 2023-02-23 | Servo pump control hydraulic valve group structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219317291U (en) |
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2023
- 2023-02-23 CN CN202320295614.1U patent/CN219317291U/en active Active
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