CN203476868U - Novel control oil passage structure for hydraulic pump - Google Patents
Novel control oil passage structure for hydraulic pump Download PDFInfo
- Publication number
- CN203476868U CN203476868U CN201320434886.1U CN201320434886U CN203476868U CN 203476868 U CN203476868 U CN 203476868U CN 201320434886 U CN201320434886 U CN 201320434886U CN 203476868 U CN203476868 U CN 203476868U
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- oil circuit
- control valve
- constant
- circuit control
- hydraulic pump
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Abstract
The utility model discloses a novel control oil passage structure for hydraulic pumps, which comprises a control oil passage. A main pump, and a proportional solenoid directional valve and a variable component for controlling the main pump are arranged in the control oil passage. The variable component comprises a variable mechanism and a variable mechanism control oil cylinder. A pressure-constant control valve is also arranged in the control oil passage. The pressure-constant control valve is connected to the output end of the main pump and the larger-side cover end of the variable mechanism control oil cylinder. The novel control oil passage structure disclosed by the utility model can achieve the effect of controlling the constant flow and constant pressure of a hydraulic pump, which can replace the DFR control mode of the existing hydraulic pump and the common EO control mode.
Description
Technical field
The utility model belongs to technical field of hydraulic, is specifically related to a kind of new hydraulic pump oil circuit control structure.
Background technique
At present, A4VSO Series Hydraulic pump is one of oil hydraulic pump being most widely used.Its constant flow constant pressure control mode of holding concurrently conventionally adopts DFR oil circuit control structure as shown in Figure 1: in this DFR oil circuit control, constant flux control FR is combined and made the object of controlling flow for reaching by pressure difference valve and throttle valve.But, in this kind of control mode, because the hydraulic energy of main pump output has the loss (loss energy W=pressure reduction P* flow Q* time T) of energy after throttle valve, be unfavorable for energy-conservation.
A4VSO-EO1 oil circuit control structure is as shown in Figure 2 one of best flow control mode of current A4VSO Series Hydraulic pump.In this EO1 oil circuit control, it is to control the action of oil cylinder 22 by the match stroking mechanism of incompatible controlled variable assembly of solenoid directional control valve 3, displacement transducer 4 and amplifier (not shown), then by stroking mechanism, controls stroking mechanism 21 that oil cylinder 22 drives variable assemblies and realize the constant flow of main pump 1 and export.The flow control accuracy of this kind of constant flux control mode is high, can realize Digital Control, and there is no energy loss, but do not possess constant voltage, does not control function.
Model utility content
The purpose of this utility model is the deficiency for existing EO oil circuit control, and a kind of constant flow constant voltage new hydraulic pump oil circuit control structure that realizes is provided.
For achieving the above object, the utility model adopts following technological scheme:
New hydraulic pump oil circuit control structure, comprises an oil circuit control, is provided with main pump and for controlling ratio solenoid directional control valve and the variable assembly of main pump in described oil circuit control, and described variable assembly comprises that stroking mechanism and stroking mechanism control oil cylinder; In described oil circuit control, be also provided with constant-pressure control valve, described constant-pressure control valve is connected with the large side cover end that described main delivery side of pump is controlled oil cylinder with described stroking mechanism respectively.
Further, be also provided with transition plate in described oil circuit control, described constant-pressure control valve and ratio solenoid directional control valve are arranged on described transition plate.
Further, described transition plate is provided with voltage stabilizing cushion hole.
As a kind of selection, described ratio solenoid directional control valve is EO1 ratio solenoid directional control valve, is also provided with displacement transducer and amplifier in described oil circuit control, thereby makes the utility model form A4VSO-EO1D oil circuit control structure.Further, described constant-pressure control valve is DRG constant-pressure control valve, thereby makes the utility model form A4VSO-EO1G oil circuit control structure.
As a kind of selection, described ratio solenoid directional control valve is EO2 ratio solenoid directional control valve, is also provided with displacement transducer and amplifier in described oil circuit control.Thereby make the utility model form A4VSO-EO2D oil circuit control structure.Further, described constant-pressure control valve is DRG constant-pressure control valve, thereby makes the utility model form A4VSO-EO2G oil circuit control structure.
The utility model, by adopting said structure, can be realized the constant flow of oil hydraulic pump and constant pressure are controlled, thereby can replace DFR control mode and the common EO control mode of existing oil hydraulic pump.
Accompanying drawing explanation
Fig. 1 is existing A4VSO-DFR oil circuit control structural drawing.
Fig. 2 is existing A4VSO-EO1 oil circuit control structural drawing.
Fig. 3 is A4VSO-EO1D oil circuit control structural drawing described in the utility model.
In figure:
1-main pump; 21-stroking mechanism; 22-stroking mechanism is controlled oil cylinder; 3-solenoid directional control valve; 4-displacement transducer; 5-constant-pressure control valve.
Now in conjunction with the accompanying drawings and embodiments the utility model is described in further detail.
Embodiment
As shown in Figure 3, new hydraulic pump oil circuit control structure described in the utility model, on the basis of existing A4VSO-EO1 oil circuit control structure, increase a transition plate (not indicating in figure) and a constant-pressure control valve 5(DR valve), constant-pressure control valve 5 is connected with the large side cover end that the output terminal of main pump 1 is controlled oil cylinder 22 with stroking mechanism respectively; The mounting type that stroking mechanism 21, stroking mechanism are controlled the parts such as oil cylinder 22, displacement transducer 4 and amplifier (not indicating in figure) is with A4VSO-EO1 oil circuit control structure.Constant-pressure control valve 5 and solenoid directional control valve 3 are all installed on this transition plate, and voltage stabilizing cushion hole (not indicating in figure) is arranged on transition plate.
The utility model forms A4VSO-EO1D oil circuit control structure, and its working procedure is as follows:
When oil hydraulic pump 1 is in running order, if the pressure of its output terminal does not reach the pressure of constant-pressure control valve 5 settings when (being conventionally no less than 6 MPas), the back pressure spring of constant-pressure control valve 5 can be pushed its spool to left end, oil circuit is now controlled A4VSO-EO1 oil circuit control structure completely as shown in Figure 2, and control mode is now exactly A4VSO-EO1 oil circuit control mode.
When the pressure of oil hydraulic pump 1 output terminal reaches the pressure of constant-pressure control valve 5 settings, the spool of constant-pressure control valve 5 can move to spring terminal, the high pressure oil of oil hydraulic pump 1 delivery outlet just flows into stroking mechanism and controls the right-hand member of oil cylinder 22 (large side cover end), and the variable bar that promotes stroking mechanism control oil cylinder 22 is moved to the left, now displacement transducer 4 senses the change in location of variable bar and sends signal to signal amplifier, it is electric that signal amplifier obtains the left end of solenoid directional control valve 3 according to self analog voltage input value, pushes away its spool to right-hand member.In the oil circuit now forming, the pressure of variable bar left end is P mouth external control oil pressure, and being constant-pressure control valve 5, the pressure of variable bar right-hand member controls according to the position of self pressure set points and variable bar, this end pressure is stable by changing to, make oil hydraulic pump by stability of flow in the minimum discharge maintaining under constant-pressure control valve setting pressure, thereby realize constant voltage, control.
In addition, in above-mentioned oil circuit control structure, change A4VSO-EO1 oil circuit control structure into A4VSO-EO2 oil circuit control structure, the utility model can form A4VSO-EO2D oil circuit control structure, and the pilot control pressure of EO2 control mode will exceed EO1 control mode.
Also have, constant-pressure control valve DR in above-mentioned A4VSO-EO1D oil circuit control structure or A4VSO-EO2D oil circuit control structure changes into has the constant-pressure control valve DRG that long-range reduced-voltage starting is controlled function and long-range voltage regulation function, and the utility model can form A4VSO-EO1G oil circuit control structure or A4VSO-EO2G oil circuit control structure.
Claims (7)
1. new hydraulic pump oil circuit control structure, comprise an oil circuit control, in described oil circuit control, be provided with main pump and for controlling ratio solenoid directional control valve and the variable assembly of main pump, described variable assembly comprises stroking mechanism and stroking mechanism control oil cylinder, it is characterized in that, in described oil circuit control, be also provided with constant-pressure control valve, described constant-pressure control valve is connected with the large side cover end that described main delivery side of pump is controlled oil cylinder with described stroking mechanism respectively.
2. new hydraulic pump oil circuit control structure according to claim 1, is characterized in that, is also provided with transition plate in described oil circuit control, and described constant-pressure control valve and ratio solenoid directional control valve are arranged on described transition plate.
3. new hydraulic pump oil circuit control structure according to claim 2, is characterized in that, described transition plate is provided with voltage stabilizing cushion hole.
4. according to the arbitrary described new hydraulic pump oil circuit control structure of claims 1 to 3, it is characterized in that, described ratio solenoid directional control valve is EO1 ratio solenoid directional control valve, is also provided with displacement transducer and amplifier in described oil circuit control.
5. new hydraulic pump oil circuit control structure according to claim 4, is characterized in that, described constant-pressure control valve is DRG constant-pressure control valve or DR constant-pressure control valve.
6. according to the arbitrary described new hydraulic pump oil circuit control structure of claims 1 to 3, it is characterized in that, described ratio solenoid directional control valve is EO2 ratio solenoid directional control valve, is also provided with displacement transducer and amplifier in described oil circuit control.
7. new hydraulic pump oil circuit control structure according to claim 6, is characterized in that, described constant-pressure control valve is DRG constant-pressure control valve or DR constant-pressure control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320434886.1U CN203476868U (en) | 2013-07-19 | 2013-07-19 | Novel control oil passage structure for hydraulic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320434886.1U CN203476868U (en) | 2013-07-19 | 2013-07-19 | Novel control oil passage structure for hydraulic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203476868U true CN203476868U (en) | 2014-03-12 |
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ID=50225204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320434886.1U Expired - Fee Related CN203476868U (en) | 2013-07-19 | 2013-07-19 | Novel control oil passage structure for hydraulic pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203476868U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457918A (en) * | 2017-02-17 | 2018-08-28 | 佛山市科达液压机械有限公司 | A kind of control of flow and pressure Variable plunger pump of free of losses |
| CN108571482A (en) * | 2017-03-07 | 2018-09-25 | 佛山市科达液压机械有限公司 | The open type pump that can reversely export |
-
2013
- 2013-07-19 CN CN201320434886.1U patent/CN203476868U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457918A (en) * | 2017-02-17 | 2018-08-28 | 佛山市科达液压机械有限公司 | A kind of control of flow and pressure Variable plunger pump of free of losses |
| CN108571482A (en) * | 2017-03-07 | 2018-09-25 | 佛山市科达液压机械有限公司 | The open type pump that can reversely export |
| CN108571482B (en) * | 2017-03-07 | 2024-04-05 | 佛山市科达液压机械有限公司 | Reversible direction output of open pump of (a) |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20170719 |
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| CF01 | Termination of patent right due to non-payment of annual fee |