CN201335055Y - Volume speed-adjusting device with combination of constant rate pump and proportional variable pump - Google Patents
Volume speed-adjusting device with combination of constant rate pump and proportional variable pump Download PDFInfo
- Publication number
- CN201335055Y CN201335055Y CNU200920018496XU CN200920018496U CN201335055Y CN 201335055 Y CN201335055 Y CN 201335055Y CN U200920018496X U CNU200920018496X U CN U200920018496XU CN 200920018496 U CN200920018496 U CN 200920018496U CN 201335055 Y CN201335055 Y CN 201335055Y
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- pump
- plunger pump
- variable
- proportional variable
- proportional
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- Expired - Fee Related
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- Control Of Positive-Displacement Pumps (AREA)
Abstract
The utility model provides a volume speed-adjusting device with the combination of a constant rate pump and a proportional variable pump. The device comprises a constant rate plunger pump; one end of the constant rate plunger pump is connected with one end of a bidirectional proportional variable plunger pump through an oil discharge pipeline; the other end of the constant rate plunger pump is connected with the other end of the bidirectional proportional variable plunger pump through an oil suction pipeline; the constant rate plunger pump and the bidirectional proportional variable plunger pump are connected with a motor respectively; the bidirectional proportional variable plunger pump is connected with a variable cylinder; the variable cylinder is connected with a displacement sensor; the displacement sensor is connected with a controller; and the controller is connected with a proportional servo valve. The volume speed-adjusting device adopts the combination of the constant rate pump and the proportional variable pump as well as the servo valve as a control manner, thereby being a substitute for an imported large-displacement proportional variable pump, doubles the displacement, and providing a volume speed-adjusting device with the advantages of low price and good running effect for the large-displacement proportional variable pump adopted in a hydraulic control system. Furthermore, the utility model has the advantages of high stability, high control precision, and strong interference resistance.
Description
Technical field
The utility model relates to hydraulic pressure installation, is the volumetric speed control device of a kind of metering pump and proportional variable pump combination.
Background technique
In the hydraulic control device, the proportional variable pump with energy-conserving and environment-protective characteristics was used in hydraulic control device gradually in recent years.Because rate variable has the function of volumetric speed control, so be again the critical piece of volumetric speed control in hydraulic control system.Yet the maximum throughput of homemade proportional variable pump has only 250ml/r, when needs use proportional variable pump greater than the 250ml/r discharge capacity, all adopts the proportional variable pumps of external import.Because the proportional variable pump of import costs an arm and a leg, and the hydraulic control device cost is increased substantially, and brings than HD to enterprise.
Summary of the invention
The purpose of this utility model is that the volumetric speed control device that provides a kind of metering pump and proportional variable pump to make up makes it can substitute big discharge capacity proportional variable pump.
The utility model for achieving the above object, be achieved through the following technical solutions: the volumetric speed control device of a kind of metering pump and proportional variable pump combination, comprise quantitative plunger pump, quantitative plunger pump one end is connected with two-way proportional Variable plunger pump one end by flowline, the quantitative plunger pump the other end is connected with the two-way proportional Variable plunger pump the other end by oil-absorbing pipeline, quantitative plunger pump is connected with motor respectively with the two-way proportional Variable plunger pump, the two-way proportional Variable plunger pump is connected with the variable oil cylinder, the variable oil cylinder is installed in and is one in the two-way proportional Variable plunger pump, the variable oil cylinder is connected with proportional servo valve, oil-absorbing pipeline is connected with fuel tank by connecting tube, quantitative plunger pump is connected with fuel tank by first drain mast, the two-way proportional Variable plunger pump is connected with fuel tank by second drain mast, the variable oil cylinder is connected with displacement transducer, displacement transducer is connected with controller, and controller is connected with proportional servo valve.Set out hydraulic fluid port on the flowline.
Advantage of the present utility model is: adopt the combination of metering pump and proportional variable pump, and adopt servovalve to control, can substitute the big discharge capacity proportional variable pump of import, increase double discharge capacity, for adopting the volumetric speed control device that big discharge capacity proportional variable pump provides cheap, operational effect is good in the hydraulic control system; The utility model good stability, control accuracy height, stronger antijamming capability etc. is arranged.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model.
Embodiment
The contrast accompanying drawing is described in further details the utility model.
The volumetric speed control device of a kind of metering pump described in the utility model and proportional variable pump combination, comprise quantitative plunger pump 1, quantitative plunger pump 1 one ends are connected with two-way proportional Variable plunger pump 4 one ends by flowline 12, quantitative plunger pump 1 the other end is connected with two-way proportional Variable plunger pump 4 the other ends by oil-absorbing pipeline, quantitative plunger pump 1 is connected with motor 2 respectively with two-way proportional Variable plunger pump 4, the Placement of these two pumps and motor 2, it also can be quantitative plunger pump 1 and 4 coaxial connections of two-way proportional Variable plunger pump, make overall structure, motor 2 is connected with this overall structure again, drives the purpose of quantitative plunger pump 1 and 4 rotations of two-way proportional Variable plunger pump to realize motor 2.Two-way proportional Variable plunger pump 4 described in the utility model is connected with variable oil cylinder 13, variable oil cylinder 13 is installed in and is one in the two-way proportional Variable plunger pump 4, variable oil cylinder 13 is connected with proportional servo valve 5, oil-absorbing pipeline 11 is connected with fuel tank 9 by connecting tube 7, quantitative plunger pump 1 is connected with fuel tank 9 by first drain mast 6, two-way proportional Variable plunger pump 4 is connected with fuel tank 9 by second drain mast 10, variable oil cylinder 13 is connected with displacement transducer 14, displacement transducer 14 is connected with controller 15, and controller 15 is connected with proportional servo valve 5.
Set out hydraulic fluid port 3 on the flowline 12 described in the utility model.
Being chosen in when satisfying the frequency response of bidirectional variable dosing pump of proportional servo valve model described in the utility model need be satisfied its stability.
Displacement transducer described in the utility model is used for the detection variable drift angle.Variable piston position difference in the variable oil cylinder 13, make the output discharge capacity difference of pump, displacement transducer 14 is passed to controller 15 with the piston position in the variable oil cylinder 13, controller 15 reaches the purpose of the output discharge capacity of control combination pump again by the piston position amount of accent in 5 pairs of variable oil cylinders of control ratio servovalve 13.
The utility model can make output displacement variation scope from 0 to two pump displacement and, for example: two pumps adopt the pump of 250ml/r, realize the rate variable of discharge capacity at 0-500ml/r, and can make existing maximum pump discharge proportional variable pump variable ability increase by 1 times.
Quantitative plunger pump described in the utility model also can adopt manual variable displacement pump to substitute.
Two-way proportional Variable plunger pump 4 described in the utility model also can be that variable oil cylinder 13 is installed in outside the pump case of two-way proportional Variable plunger pump 4 with the annexation of variable oil cylinder 13, that is: two-way proportional Variable plunger pump 4 is connected with variable oil cylinder 13, in a word, the various structures of two-way proportional Variable plunger pump of the present utility model all can be used.
Claims (2)
1, the volumetric speed control device of a kind of metering pump and proportional variable pump combination, it is characterized in that: comprise quantitative plunger pump (1), quantitative plunger pump (1) one end is connected with two-way proportional Variable plunger pump (4) one ends by flowline (12), quantitative plunger pump (1) the other end is connected with two-way proportional Variable plunger pump (4) the other end by oil-absorbing pipeline (11), quantitative plunger pump (1) is connected with motor (2) respectively with two-way proportional Variable plunger pump (4), two-way proportional Variable plunger pump (4) is connected with variable oil cylinder (13), variable oil cylinder (13) is installed in and is one in the two-way proportional Variable plunger pump (4), variable oil cylinder (13) is connected with proportional servo valve (5), oil-absorbing pipeline (11) is connected with fuel tank (9) by connecting tube (7), quantitative plunger pump (1) is connected with fuel tank (9) by first drain mast (6), two-way proportional Variable plunger pump (4) is connected with fuel tank (9) by second drain mast (10), variable oil cylinder (13) is connected with displacement transducer (14), displacement transducer (14) is connected with controller (15), and controller (15) is connected with proportional servo valve (5).
2, the volumetric speed control device of a kind of metering pump according to claim 1 and proportional variable pump combination is characterized in that: set out hydraulic fluid port (3) on the flowline (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200920018496XU CN201335055Y (en) | 2009-02-06 | 2009-02-06 | Volume speed-adjusting device with combination of constant rate pump and proportional variable pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200920018496XU CN201335055Y (en) | 2009-02-06 | 2009-02-06 | Volume speed-adjusting device with combination of constant rate pump and proportional variable pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201335055Y true CN201335055Y (en) | 2009-10-28 |
Family
ID=41286705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200920018496XU Expired - Fee Related CN201335055Y (en) | 2009-02-06 | 2009-02-06 | Volume speed-adjusting device with combination of constant rate pump and proportional variable pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201335055Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508330A (en) * | 2016-01-12 | 2016-04-20 | 浙江大学 | Electromagnet-driven digital hydraulic servo actuator |
-
2009
- 2009-02-06 CN CNU200920018496XU patent/CN201335055Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508330A (en) * | 2016-01-12 | 2016-04-20 | 浙江大学 | Electromagnet-driven digital hydraulic servo actuator |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091028 Termination date: 20130206 |