CN106168234A - A kind of dosing pump variable delivery hydraulic system - Google Patents
A kind of dosing pump variable delivery hydraulic system Download PDFInfo
- Publication number
- CN106168234A CN106168234A CN201610548775.1A CN201610548775A CN106168234A CN 106168234 A CN106168234 A CN 106168234A CN 201610548775 A CN201610548775 A CN 201610548775A CN 106168234 A CN106168234 A CN 106168234A
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- valve
- oil
- mouth
- dosing pump
- hydraulic
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The present invention relates to the fuel feeding hydraulic system of dosing pump, be difficult to tackle the accessory fuel feeding problem of different flow requirement for solving existing dosing pump oil supply system；There is provided a kind of dosing pump variable delivery hydraulic system, including hydraulic actuating mechanism, the solenoid directional control valve of control hydraulic actuating mechanism, operation handle, dosing pump, hydraulic oil container, controller, flow input instrument, three-way flowrate valve；The outfan input corresponding with described controller of described operation handle and flow input instrument connects, the corresponding outfan of described controller is connected with the Electromagnetic Control end of described three-way flowrate valve and solenoid directional control valve, the oil-feed P mouth of described three-way flowrate valve is connected with described dosing pump, the fuel-displaced A mouth that works is connected with the oil-in of described solenoid directional control valve, and oil return B mouth is connected with hydraulic oil container.This system structure is simple, with low cost；Reduce spill losses, save energy consumption；Combination of electric and hydraulic, controls reliable and stable, handling good；Widen quantitative system function, make quantitative system adaptability higher.
Description
Technical field
The present invention relates to a kind of hydraulic system, more particularly, it relates to a kind of variable delivery hydraulic system using dosing pump.
Background technology
Regulating what the flow of system was carried out generally by the method for throttle grverning in hydraulic system with constant displacement pump, dosing pump saves
Flow governing system flow unnecessary in speed regulation process and must be can be only achieved the purpose of speed governing by overflow valve overflow, thus can
There is bigger spill losses, inherently there is restriction loss plus system, the energy consumption of system and heating will be the biggest.Quantitatively
Pump delivery must be selected according to system maximum necessary flow, when driving low discharge actuator it is generally required to increase flow speed control valve
Limiting the maximum stream flow that system provides, can there is the biggest flow waste the most equally, the flow of this part waste is also logical
Crossing overflow valve overflow to fall, spill losses is the most serious.Or being controlled by changing reversal valve opening, such operability will be very
Difference, and the pressure loss of spool also can increase, and the most also can aggravate energy consumption.If the system maximum stream flow of being not intended to will cause
Actuator exceeds the speed limit, and damages actuator.
At present accessory can be assembled in certain customers front end when excavator work, and some accessory needs revolution, accessory turn round or
Single movement or do composite move together with digger operating device, in order to improve the operability of complete machine, generally accessory revolution
Individually fuel feeding, it is to avoid influence each other with the main hydraulic system of digger operating device.Accessory revolution typically only needs system to provide genus
Tool revolution necessary flow, often changes without flow system flow, if being that system fuel feeding will cause functionally with variable pump
Waste and also cost also can rise can many, so accessory rotary system select dosing pump be system fuel feeding.Digging as shown in Figure 1
Pick machine accessory rotary system just belongs to appeal system, and three, reversal valve 8 Shi Kai center six-way transfer valve in figure, it is in engineering machinery
Upper very universal, belong to inlet throttle speed governing and the combination of bypass throttle speed governing.Excavator accessory is of a great variety now, each
Flow needed for accessory revolution is different, typically presses the required average discharge of accessory revolution and sets quantitative pump delivery.For stream
The accessory that amount demand is big is unable to reach rate request, can only meet the demand of accessory flow by changing quantitative pump delivery.
And the problems referred to above are arisen that for the accessory that traffic demand is few, and in order to prevent accessory from exceeding the speed limit, can opening by operation handle 1
Degree controls the opening of solenoid directional control valve 8, makes solenoid directional control valve 8 be in non-open state all the time, to meet accessory rate request,
Thus can there is the fluid middle bit stream oil sump tank by solenoid directional control valve 8 greatly all the time, increase the pressure between valve port
Loss, wastes energy, and operability is very poor；Flow speed control valve can also be increased between dosing pump 4 and reversal valve 8, or at accessory
Respectively add a flow speed control valve on working line, such overflow valve 6 will overflow all the time, same system energy consumption is the biggest.
Summary of the invention
The technical problem to be solved in the present invention is difficult to tackle different flow requirement for existing dosing pump oil supply system
Accessory fuel feeding problem, and a kind of dosing pump variable delivery hydraulic system being suitable for different flow requirement accessory fuel feeding is provided.
The present invention is such that providing a kind of dosing pump variable delivery hydraulic system for the technical scheme realizing its purpose, including
Hydraulic actuating mechanism, the solenoid directional control valve of control hydraulic actuating mechanism, operation handle, dosing pump, hydraulic oil container；It is characterized in that
Also include that controller, flow input instrument, three-way flowrate valve；The outfan of described operation handle and flow input instrument is with described
The corresponding input of controller connects, the corresponding outfan of described controller and described three-way flowrate valve and the electricity of solenoid directional control valve
Magnetic control end connects, and the oil-feed P mouth of described three-way flowrate valve is connected with described dosing pump, and the fuel-displaced A mouth that works changes with described electromagnetism
Connecting to the oil-in of valve, oil return B mouth is connected with hydraulic oil container.
In above-mentioned dosing pump variable delivery hydraulic system, described three-way flowrate valve is made up of proportional throttle valve and pressure-compensated valve,
Described pressure-compensated valve is cross valve, and two oil-in oil inlet and outlet with described proportional throttle valve respectively connects, and two go out
Hydraulic fluid port is connected with the fuel-displaced A mouth of work and oil return B mouth respectively, and the spring cavity of described pressure-compensated valve controls end and throttles with described ratio
The outlet of valve connects, and another control end of described pressure-compensated valve is connected with the oil-in of described proportional throttle valve, described ratio
The oil-in of choke valve connects with oil-feed P mouth, and the electromagnetism end of described proportional throttle valve is connected with controller.
The present invention compared with prior art, has the advantage that
1. simple in construction, with low cost；
2. reduce spill losses, save energy consumption；
3. combination of electric and hydraulic, controls reliable and stable, handling good；
4. widen quantitative system function, make quantitative system adaptability higher.
Accompanying drawing explanation
Fig. 1 is hydraulic system with constant displacement pump schematic diagram in prior art.
Fig. 2 is dosing pump variable delivery hydraulic system schematic diagram of the present invention.
Parts title and sequence number in figure:
Operation handle 1, controller 2, flow input instrument 3, dosing pump 4, three-way flowrate valve 5, proportional throttle valve 51, pressure
Recuperation valve 52, overflow valve 6, check valve 7, solenoid directional control valve 8, actuator the 9, first hydraulic fluid port overflow valve the 10, second hydraulic fluid port overflow
Valve 11.
Detailed description of the invention
Specific embodiments is described below in conjunction with the accompanying drawings.
As in figure 2 it is shown, the dosing pump variable delivery hydraulic system in the present embodiment, mainly include hydraulic actuating mechanism 9, control liquid
The solenoid directional control valve 8 of pressure actuator, operation handle 1, dosing pump 4, hydraulic oil container, controller 2, flow input instrument 3, threeway
Flow valve 5 parts such as grade.
Solenoid directional control valve 8 is three six-way valves, and its A hydraulic fluid port and B hydraulic fluid port are connected with hydraulic actuating mechanism respectively, position in spool
Oil-out connects with hydraulic oil container, and the P mouth of solenoid directional control valve 8 connects and three-way flow in parallel with position oil-in in spool after check valve
The A hydraulic fluid port connection of amount valve 5, the T mouth of solenoid directional control valve 8 connects with hydraulic oil container, hydraulic actuating mechanism and solenoid directional control valve 8 it
Between two oil circuits connect with hydraulic oil container through first hydraulic fluid port overflow valve the 10, second hydraulic fluid port overflow valve 11 respectively, the oil-feed of check valve
Mouth connects with hydraulic oil container through overflow valve 6.The two ends Electromagnetic Control end outfan corresponding with controller of solenoid directional control valve 8 is even
Connect.
Three-way flowrate valve is made up of proportional throttle valve and pressure-compensated valve, and pressure-compensated valve is cross valve, two oil-feed
Mouth connects with the oil inlet and outlet of proportional throttle valve respectively, and two oil-outs are connected with the fuel-displaced A mouth of work and oil return B mouth respectively, pressure
The spring cavity of force compensating valve controls end and is connected with the outlet of proportional throttle valve, and another of pressure-compensated valve controls end and ratio throttling
The oil-in of valve connects, and the oil-in of described proportional throttle valve connects with oil-feed P mouth, the electromagnetism end of described proportional throttle valve and control
Device processed connects.
The outfan input corresponding with controller of operation handle and flow input instrument connects, and the correspondence of controller is defeated
Go out end to be connected with the Electromagnetic Control end of proportional throttle valve in three-way flowrate valve and the Electromagnetic Control end of solenoid directional control valve, three-way flowrate
The oil-feed P mouth of valve is connected with described dosing pump, and the fuel-displaced A mouth that works is connected with the oil-in of described solenoid directional control valve, oil return B mouth with
Hydraulic oil container connects.
Three-way flowrate valve 5 operation principle is as follows: the current value that proportional throttle valve 51 sends according to controller, determines that spool is opened
Open area, after current value is fixing, the valve core opening of this valve determines that.The control end at pressure-compensated valve 52 spool two ends
Fluid is taken respectively from oil-in and the oil-out of proportional throttle valve 51, and the inlet outlet pressure differential of such proportional throttle valve 51 is mended with pressure
The spring force repaying valve 52 balances each other, and this value is substantially constant.Flow through the flow of choke valve only with valve core opening area and
Spool inlet outlet pressure differential is relevant, and when proportional throttle valve current value is fixed, the flow flowing through proportional throttle valve 51 is constant.This
Sample three-way flowrate valve 5 from oil-feed P mouth to work fuel-displaced A mouth fluid flow be also fixing, not by load effect, dosing pump 4
The unnecessary fluid provided flows back to fuel tank by oil return B mouth, and oil-feed P mouth to the pressure loss of oil return B mouth relative to overflow pressure
Power loss is the least.
In this enforcement, the specific works process of dosing pump variable delivery hydraulic system is as follows: first input accessory institute in instrument 3
Needing working flow, dosing pump 4 provides fluid for accessory, and during operation handle 1 attonity, controller 2 exports to three-way flowrate valve 5
Big electric current, now three-way flowrate valve 5 is inoperative, is equivalent to a passage, and fluid passes through the middle position of reversal valve 8 through dosing pump 4
Flow back to fuel tank.When handle 1 total travel operates, controller 2 is according to the accessory workflow value of the input of instrument 3, to three-way flow
Amount valve 5 exports corresponding current so that it is the working flow that output accessory needs, and controls solenoid directional control valve 8 simultaneously and commutates, drives accessory
Rotate.Fluid flows out through dosing pump 4, and through the oil-feed P mouth inflow of three-way flowrate valve 5, accessory necessary flow is through the fuel-displaced A mouth stream that works
Going out, unnecessary fluid flows back to fuel tank through oil return B mouth.The fluid flowed out from the fuel-displaced A mouth that works flows into through check valve 7, then flows into the side of changing
To the P mouth of 8, flow out through A mouth or B mouth, then flow into accessory, drive accessory to rotate.When handle 1 fine motion is made, from dosing pump 4 to three
The flowing of through-current capacity valve 5 fluid operates with total travel, and fluid enters oil-feed P mouth, owing to solenoid directional control valve 8 spool does not has standard-sized sheet, and stream
The fluid part entering solenoid directional control valve 8 flows out A mouth or B mouth inflow accessory, it is achieved accessory fine motion is made, and another part is through reversal valve
Bit stream oil sump tank in 8.
Claims (2)
1. a dosing pump variable delivery hydraulic system, including hydraulic actuating mechanism, controls the solenoid directional control valve of hydraulic actuating mechanism, behaviour
Make handle, dosing pump, hydraulic oil container；Characterized by further comprising controller, flow input instrument, three-way flowrate valve；Described behaviour
The outfan input corresponding with described controller making handle and flow input instrument connects, the corresponding output of described controller
End is connected with the Electromagnetic Control end of described three-way flowrate valve and solenoid directional control valve, and the oil-feed P mouth of described three-way flowrate valve is with described
Dosing pump connects, and the fuel-displaced A mouth that works is connected with the oil-in of described solenoid directional control valve, and oil return B mouth is connected with hydraulic oil container.
Dosing pump variable delivery hydraulic system the most according to claim 1, it is characterised in that described three-way flowrate valve is saved by ratio
Stream valve and pressure-compensated valve constitute, described pressure-compensated valve is cross valve, two oil-in respectively with described proportional throttle valve
Oil inlet and outlet connection, two oil-outs respectively with work fuel-displaced A mouth and oil return B mouth is connected, the spring of described pressure-compensated valve
Chamber controls end and is connected with the outlet of described proportional throttle valve, and another of described pressure-compensated valve controls end and described proportional throttle valve
Oil-in connect, the oil-in of described proportional throttle valve connects with oil-feed P mouth, the electromagnetism end of described proportional throttle valve and control
Device connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610548775.1A CN106168234B (en) | 2016-07-13 | 2016-07-13 | A kind of constant displacement pump variable delivery hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610548775.1A CN106168234B (en) | 2016-07-13 | 2016-07-13 | A kind of constant displacement pump variable delivery hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106168234A true CN106168234A (en) | 2016-11-30 |
| CN106168234B CN106168234B (en) | 2018-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610548775.1A Active CN106168234B (en) | 2016-07-13 | 2016-07-13 | A kind of constant displacement pump variable delivery hydraulic system |
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| Country | Link |
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| CN (1) | CN106168234B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499682A (en) * | 2016-12-27 | 2017-03-15 | 中交第二航务工程局有限公司 | A kind of hydraulic system for pile driving barge |
| CN106525694A (en) * | 2016-12-27 | 2017-03-22 | 盐城工学院 | Electromagnetic sensing type permeation pressure loading device for rock permeation test |
| CN109630504A (en) * | 2018-12-26 | 2019-04-16 | 太原理工大学 | A kind of pressure compensated oil inlet and outlet autonomous control system of band |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5682744A (en) * | 1993-07-26 | 1997-11-04 | Komatsu Ltd. | Directional control valve in a full hydraulic type steering control system |
| CN1496449A (en) * | 2000-08-08 | 2004-05-12 | 胡斯可国际股份有限公司 | Hydraulic control valve system with pressure compensated flow control |
| CN103058071A (en) * | 2012-12-27 | 2013-04-24 | 徐州重型机械有限公司 | Crane, and hydraulic system, control system, and speed control method for superlift rope collection |
| CN103727082A (en) * | 2013-12-27 | 2014-04-16 | 三一汽车起重机械有限公司 | Hydraulic system and engineering machine |
| CN104032792A (en) * | 2014-05-28 | 2014-09-10 | 广西柳工机械股份有限公司 | Quantitative and variable hydraulic system of loading machine |
-
2016
- 2016-07-13 CN CN201610548775.1A patent/CN106168234B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5682744A (en) * | 1993-07-26 | 1997-11-04 | Komatsu Ltd. | Directional control valve in a full hydraulic type steering control system |
| CN1496449A (en) * | 2000-08-08 | 2004-05-12 | 胡斯可国际股份有限公司 | Hydraulic control valve system with pressure compensated flow control |
| CN103058071A (en) * | 2012-12-27 | 2013-04-24 | 徐州重型机械有限公司 | Crane, and hydraulic system, control system, and speed control method for superlift rope collection |
| CN103727082A (en) * | 2013-12-27 | 2014-04-16 | 三一汽车起重机械有限公司 | Hydraulic system and engineering machine |
| CN104032792A (en) * | 2014-05-28 | 2014-09-10 | 广西柳工机械股份有限公司 | Quantitative and variable hydraulic system of loading machine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499682A (en) * | 2016-12-27 | 2017-03-15 | 中交第二航务工程局有限公司 | A kind of hydraulic system for pile driving barge |
| CN106525694A (en) * | 2016-12-27 | 2017-03-22 | 盐城工学院 | Electromagnetic sensing type permeation pressure loading device for rock permeation test |
| CN106499682B (en) * | 2016-12-27 | 2018-07-06 | 中交第二航务工程局有限公司 | A kind of hydraulic system for pile driving barge |
| CN109630504A (en) * | 2018-12-26 | 2019-04-16 | 太原理工大学 | A kind of pressure compensated oil inlet and outlet autonomous control system of band |
| CN109630504B (en) * | 2018-12-26 | 2021-01-26 | 太原理工大学 | Oil inlet and outlet independent control system with pressure compensation function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106168234B (en) | 2018-06-29 |
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