CN203717318U - Electric-hydraulic proportional displacement adjustment mechanism of axial plunger hydraulic pump - Google Patents
Electric-hydraulic proportional displacement adjustment mechanism of axial plunger hydraulic pump Download PDFInfo
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- CN203717318U CN203717318U CN201320734643.XU CN201320734643U CN203717318U CN 203717318 U CN203717318 U CN 203717318U CN 201320734643 U CN201320734643 U CN 201320734643U CN 203717318 U CN203717318 U CN 203717318U
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- electromagnetic valve
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- proportional electromagnetic
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Abstract
The utility model provides an electric-hydraulic proportional displacement adjustment mechanism of an axial plunger hydraulic pump. The mechanism consists of a two-position two-way proportional electromagnetic valve, a pressure reduction valve, a differential piston hydraulic cylinder, an electric displacement sensor and an electronic amplifier matched with the two-position two-way proportional electromagnetic valve. The mechanism is mounted on the body of the axial plunger hydraulic pump of the domestic CY series and is high in practicability, reasonable in structure and convenient to maintain, and the use cost can be greatly lowered.
Description
Technical field
The technical field that this patent relates to is Fluid-transmission and the control technique in mechanical-electronic engineering.
Background technique
Current in Fluid-transmission and control technique field, energy-conservation hydraulic system is preferential selection, particularly all the more so to the hydraulic system of high-power.Adopt with the oil hydraulic pump of electric-hydraulic proportion discharge capacity controlling mechanism should be energy-saving hydraulic system in the urgent need to, this is because this oil hydraulic pump can combine with microelectronic technology and computer technology, can quote easily various control modes and strategy, utilize electrical signal to realize power coordination or various adaptation control, thereby the parameter (as flow pressure etc.) of oil hydraulic pump output can need to be matched with load and without unnecessary power loss; It can meet demand and the energy-conservation requirement of high-power hydraulic system as the energy-conservation Hydraulic power units of cheapness.
The external electrohydraulic proportion variable oil hydraulic pump of the many employings of hydraulic equipment of the high-power of Present Domestic, complex structure, expensive, difficult in maintenance.
Summary of the invention
Model utility object: the utility model provides a kind of electric-hydraulic proportion discharge capacity controlling mechanism of axial plunger hydraulic pump, its objective is the existing complex structure of solution mode in the past, problem expensive and difficult in maintenance.
Technological scheme: the utility model is achieved through the following technical solutions:
An electric-hydraulic proportion discharge capacity controlling mechanism for axial plunger hydraulic pump, is characterized in that: this mechanism is made up of bi-bit bi-pass proportional electromagnetic valve, reduction valve, stepped piston oil hydraulic cylinder, electric displacement sensor and forms with the supporting electron-amplifier of bi-bit bi-pass proportional electromagnetic valve; Wherein bi-bit bi-pass proportional electromagnetic valve adopts the mode of stack to be connected with stepped piston oil hydraulic cylinder with reduction valve, the piston extension bar of the extension bar of electric displacement sensor and stepped piston oil hydraulic cylinder is rigidly connected by connecting rod, electric displacement sensor is also connected with electron-amplifier, and electron-amplifier connects bi-bit bi-pass proportional electromagnetic valve.
In the cylinder body of stepped piston oil hydraulic cylinder, be drilled with damping hole R; Reduction valve is arranged on the filler opening place of stepped piston oil hydraulic cylinder cavity of resorption, and bi-bit bi-pass proportional electromagnetic valve is arranged on the oil outlet place of stepped piston oil hydraulic cylinder; Bi-bit bi-pass proportional electromagnetic valve, stepped piston oil hydraulic cylinder, damping hole R and reduction valve form category-B type hydraulic half-bridge loop.
Electron-amplifier is connected with screened lead with bi-bit bi-pass proportional electromagnetic valve.
Advantage and effect:
The utility model provides a kind of electric-hydraulic proportion discharge capacity controlling mechanism of axial plunger hydraulic pump, and this mechanism is arranged on the body of axial plunger hydraulic pump of domestic CY series, and its practicability is high, rational in infrastructure, easy to maintenance and can greatly reduce user cost.
Brief description of the drawings:
Fig. 1 is the profile schematic diagram of the utility model with the axial plunger hydraulic pump of electric-hydraulic proportion discharge capacity controlling mechanism;
Fig. 2 is electric-hydraulic proportion discharge capacity controlling mechanism hydraulic system pie graph of the present utility model;
Fig. 3 is monolateral guiding valve-control stepped piston-Displacement Feedback system block diagrams of the present utility model.
Embodiment: the utility model is further described below in conjunction with accompanying drawing:
As illustrated in fig. 1 and 2, the utility model provides a kind of electric-hydraulic proportion discharge capacity controlling mechanism of axial plunger hydraulic pump, and this structure is made up of bi-bit bi-pass proportional electromagnetic valve 1, reduction valve 2, stepped piston oil hydraulic cylinder 4, electric displacement sensor 5 and forms with the supporting electron-amplifier 7 of bi-bit bi-pass proportional electromagnetic valve 1; Wherein bi-bit bi-pass proportional electromagnetic valve 1 adopts the mode of stack to be connected with stepped piston oil hydraulic cylinder 4 with reduction valve 2, the piston extension bar of the extension bar of electric displacement sensor 5 and stepped piston oil hydraulic cylinder 4 is rigidly connected by connecting rod 6, electric displacement sensor 5 is also connected with electron-amplifier 7, and electron-amplifier 7 connects bi-bit bi-pass proportional electromagnetic valve 1.
In the cylinder body of stepped piston oil hydraulic cylinder 4, be drilled with damping hole R; Reduction valve 2 is arranged on the filler opening place of stepped piston oil hydraulic cylinder 4 cavity of resorptions, and bi-bit bi-pass proportional electromagnetic valve 1 is arranged on the oil outlet place of stepped piston oil hydraulic cylinder 4; Bi-bit bi-pass proportional electromagnetic valve 1, stepped piston oil hydraulic cylinder 4, damping hole R and reduction valve 2 form Type B hydraulic half-bridge loop.
Fig. 1 has represented the profile schematic diagram with the axial plunger hydraulic pump of this mechanism.In figure, dot and dash line part is exactly the profile schematic diagram of electric-hydraulic proportion discharge capacity controlling mechanism of the present utility model.Taking 25CY14-1B type axial plunger hydraulic pump as type.The utility model gets out corresponding duct and has formed specific loop in the cylinder body of stepped piston oil hydraulic cylinder 4, and these elements combinations are got up, and has formed a compact integrated model.In Fig. 1 111 is the electric-hydraulic proportion discharge capacity controlling mechanism of axial plunger hydraulic pump of the present utility model, and 222 for revealing hydraulic fluid port, and 333 is hydraulic fluid port, and 444 is axial plunger hydraulic pump.
Electron-amplifier 7 is connected with bi-bit bi-pass proportional electromagnetic valve 1 use screened lead.
Mechanism of the present utility model is screwed and is connected with the form of flange and ' body ' of axial plunger hydraulic pump part, forms a brand-new axial plunger hydraulic pump with electric-hydraulic proportion discharge capacity controlling mechanism.
Fig. 2 can represent the composition situation of hydraulic system of this patent electric-hydraulic proportion discharge capacity controlling mechanism and the principle of work.In figure, dot and dash line part is exactly the schematic diagram that the utility model electric-hydraulic proportion discharge capacity controlling mechanism hydraulic system forms.Control oil of the present utility model is circulation like this: control oil carrys out fuel feeding or the external control oil of self-pumping itself, oil first arrives the cavity of resorption of stepped piston oil hydraulic cylinder 4 through reduction valve 2, arrive piston large-area epicoele by damping hole R, then through the valve port X of bi-bit bi-pass proportional electromagnetic valve 1
vflow back to fuel tank.In figure, 555 pump oil and go system, 666 oil suctions, and 777 control oil, 888 variable swash plates.
Structurally, stepped piston oil hydraulic cylinder 4 is connected with the variable swash plate of the main body of axial piston pump in hinged mode; If stepped piston has displacement Xp to change, make the angle of inclination beta of variable swash plate be changed accordingly, thereby just changed hydraulic pressure pump delivery.
Working principle of the present utility model is to belong to " monolateral guiding valve-control stepped piston-Displacement Feedback " system.It is a closed loop control system, and Fig. 3 is this closed loop control Block Diagram.It has represented the working principle of mechanism.
Symbol Vi-input signal in Fig. 3, Vf-feedback signal is the output signal of displacement transducer, i-deviation signal, the displacement of Xv--valve, the displacement of Xp--stepped piston is the input signal of displacement transducer, Qp--pump delivery output quantity
The application feature as follows:
1) electric-hydraulic proportion discharge capacity controlling mechanism is simple in structure, compact, easy to manufacture; Its Conncetion cimension is just changed accordingly and can be connected with the body of domestic CY series axial plunger hydraulic pump, has filled up the vacancy of domestic CY series axial plunger hydraulic pump stroking mechanism pattern, and it has a extensive future.
2) performance index of electric-hydraulic proportion discharge capacity controlling mechanism more advanced (as indexs such as the linearity, repeatability, stagnant ring, frequency ranges), can meet the requirement of the control characteristic of oil hydraulic pump completely;
3) if quote various control modes and strategy is convenient to utilize electrical signal to realize power coordination or various adaptation control with the axial piston pump of this electric-hydraulic proportion discharge capacity controlling mechanism, make the parameter (as flow pressure etc.) of output need to match with load and without unnecessary power loss, to reach energy-conservation object.
Claims (3)
1. an electric-hydraulic proportion discharge capacity controlling mechanism for axial plunger hydraulic pump, is characterized in that: this structure forms by bi-bit bi-pass proportional electromagnetic valve (1), reduction valve (2), stepped piston oil hydraulic cylinder (4), electric displacement sensor (5) with the supporting electron-amplifier (7) of bi-bit bi-pass proportional electromagnetic valve (1); Wherein bi-bit bi-pass proportional electromagnetic valve (1) adopts the mode of stack to be connected with stepped piston oil hydraulic cylinder (4) with reduction valve (2), the piston extension bar of the extension bar of electric displacement sensor (5) and stepped piston oil hydraulic cylinder (4) is rigidly connected by connecting rod (6), electric displacement sensor (5) is also connected with electron-amplifier (7), and electron-amplifier (7) connects bi-bit bi-pass proportional electromagnetic valve (1).
2. the electric-hydraulic proportion discharge capacity controlling mechanism of axial plunger hydraulic pump according to claim 1, is characterized in that: in the cylinder body of stepped piston oil hydraulic cylinder (4), be drilled with damping hole (R); Reduction valve (2) is arranged on the filler opening place of stepped piston oil hydraulic cylinder (4) cavity of resorption, and bi-bit bi-pass proportional electromagnetic valve (1) is arranged on the oil outlet place of stepped piston oil hydraulic cylinder (4); Bi-bit bi-pass proportional electromagnetic valve (1), stepped piston oil hydraulic cylinder (4), damping hole (R) and reduction valve (2) form category-B type hydraulic half-bridge loop.
3. the electric-hydraulic proportion discharge capacity controlling mechanism of axial plunger hydraulic pump according to claim 1, is characterized in that: electron-amplifier (7) is connected with screened lead with bi-bit bi-pass proportional electromagnetic valve (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320734643.XU CN203717318U (en) | 2013-11-20 | 2013-11-20 | Electric-hydraulic proportional displacement adjustment mechanism of axial plunger hydraulic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320734643.XU CN203717318U (en) | 2013-11-20 | 2013-11-20 | Electric-hydraulic proportional displacement adjustment mechanism of axial plunger hydraulic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203717318U true CN203717318U (en) | 2014-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320734643.XU Expired - Fee Related CN203717318U (en) | 2013-11-20 | 2013-11-20 | Electric-hydraulic proportional displacement adjustment mechanism of axial plunger hydraulic pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203717318U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557153A (en) * | 2013-11-20 | 2014-02-05 | 沈阳工业大学 | Electric-hydraulic proportional displacement regulating mechanism of axial plunger hydraulic pump |
-
2013
- 2013-11-20 CN CN201320734643.XU patent/CN203717318U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557153A (en) * | 2013-11-20 | 2014-02-05 | 沈阳工业大学 | Electric-hydraulic proportional displacement regulating mechanism of axial plunger hydraulic pump |
| CN103557153B (en) * | 2013-11-20 | 2016-01-20 | 沈阳工业大学 | The electric-hydraulic proportion discharge capacity controlling mechanism of axial plunger hydraulic pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20141120 |
|
| EXPY | Termination of patent right or utility model |