CN108035921A - A kind of hydraulic circuit for pumping the single rod piston cylinder of control - Google Patents
A kind of hydraulic circuit for pumping the single rod piston cylinder of control Download PDFInfo
- Publication number
- CN108035921A CN108035921A CN201711225639.XA CN201711225639A CN108035921A CN 108035921 A CN108035921 A CN 108035921A CN 201711225639 A CN201711225639 A CN 201711225639A CN 108035921 A CN108035921 A CN 108035921A
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- CN
- China
- Prior art keywords
- valve
- hydraulic
- control
- mouths
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- 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
-
- 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
- F15B13/027—Check valves
Abstract
A kind of hydraulic circuit for pumping the single rod piston cylinder of control, belong to hydraulic transmission technology field, including prime mover, main pump, slippage pump, first, second hydraulic control one-way valve, shuttle valve, working cylinder, hydraulic transformer, high-pressure reversing valve, fuel tank, controller, it is two four-way electromagnetic reversing valves to be characterized in high-pressure reversing valve, the right working position of reversal valve is M shape slide valve functions, the first of working cylinder, second working chamber respectively with Pa mouthfuls of main pump, the P mouths connection of reversal valve, the T mouths of reversal valve are connected with the Pb mouths of main pump, the A mouths of reversal valve, B mouthfuls of A mouths with hydraulic transformer respectively, B mouthfuls of connections.Advantage is working cylinder in heavy duty and load stabilization operating mode, and using two fluid-control one-way valve compensation asymmetry flows, energy efficiency is high, in cycling alternating load operating mode, compensates asymmetric flow using hydraulic transformer, avoids working cylinder velocity jump.
Description
Technical field
The invention belongs to hydraulic transmission technology field, and in particular to a kind of hydraulic circuit for pumping the single rod piston cylinder of control.
Background technology
Pump control system is to directly control execution unit by variable pump（Hydraulic motor or hydraulic cylinder）The hydraulic pressure of operating rate
System, eliminates multi-way valve, avoids restriction loss, and system energy efficiency is high.Pump control cylinder circuit is divided into pump control asymmetric cylinder and pump control is single
Rod piston cylinder.Pump control asymmetric cylinder technical research starting is more early, has been gradually improved.However, the single rod piston cylinder technology of pump control is still
Immature, different mainly due to the plunger shaft of single rod piston cylinder and the work area of rod end chamber, two-chamber flow is inconsistent.
The LODEWYKS of German Aachen polytechnical universities proposes to drive two change discharge capacity ratios using hydraulic transformer or axis
The two-chamber difference in areas of the single rod piston cylinder of example hydraulic pump compensation.Doctor RAHMFELD of Hamburg polytechnical universities etc. is to separate unit liquid
Press pump coordinates the closed model pump control list rod piston cylinder circuit of hydraulic control one-way valve repairing to be studied.Institutes Of Technology Of Taiyuan power dragon proposes
A kind of three match somebody with somebody the axial plunger pumps of head piece, directly control single rod piston cylinder.Hitachi, Japan builds the single rod of machine application pump control
Cylinder device is used for the patent of excavator boom, by detecting load force direction change position, changes servomotor rotating speed
Or plunger pump swash plate pivot angle, to eliminate dipper velocity jump when load direction changes.
At present, need to use two high-pressure hydraulic pumps in the single rod piston cylinder circuit of pump control, or set in high tension loop
Hydraulic transformer or asymmetric flow is compensated using two hydraulic control one-way valves, there are cost is higher, energy-saving effect is paid no attention to
Think, cycling alternating load when cylinder velocity jump the problems such as.
The content of the invention
, can be efficiently against in the prior art it is an object of the present invention to provide a kind of hydraulic circuit for pumping the single rod piston cylinder of control
There are the problem of.
The object of the present invention is achieved like this, as shown in Figure 1, it include prime mover 1, main pump 2, slippage pump 3, first,
Second low pressure relief valve, 4,10, first, second hydraulic control one-way valve, 5,6, first, second safety valve 7,8, shuttle valve 9, working cylinder 11,
High-pressure reversing valve 12, hydraulic transformer 13, fuel tank, controller, its connection relation are the masters of prime mover 1, main pump 2 and slippage pump 3
Axis is connected, the Pa mouths of main pump 2 and the oil outlet of the first hydraulic control one-way valve 5, the hydraulic control mouth of the second hydraulic control one-way valve 6, the first peace
The oil outlet of full valve 7, the oil inlet of the second safety valve 8, the first hydraulic fluid port of shuttle valve 9 and the connection of the first control mouth, the Pb mouths of main pump 2
The hydraulic control mouth of oil outlet, the first hydraulic control one-way valve 5 with the second hydraulic control one-way valve 6, the oil inlet of the first safety valve 7, the second peace
The oil outlet of full valve 8, the second hydraulic fluid port of shuttle valve 9 and the connection of the second control mouth, the oil outlet of slippage pump 3 and the first low pressure relief valve
The oil inlet connection of 4 oil inlet, first, second hydraulic control one-way valve 5,6, the 3rd hydraulic fluid port of shuttle valve 9 and the second low pressure relief valve
10 oil inlet connection, the oil inlet of slippage pump 3, the oil outlet of first, second low pressure relief valve 4,10 are connected with fuel tank, it is special
Sign is：
P mouth of first, second working chamber of the working cylinder 11 respectively with Pa mouthfuls of main pump, high-pressure reversing valve 12 connects, high pressure
The T mouths of reversal valve 12 are connected with the Pb mouths of main pump 2, the A mouths of high-pressure reversing valve 12, B mouthfuls of A mouths, B with hydraulic transformer 13 respectively
Mouth connection.
The working cylinder 11 is single rod piston cylinder, effective work area of first, second working chamber of working cylinder 11
Ratio is denoted as K1, K1 ≠ 1.
The high-pressure reversing valve 12 is four-way reversing valve, is M shape guiding valves at least with two working positions, the first working position
Function, the P mouths of the second working position are connected with A mouthfuls, T mouthfuls connected with B mouthfuls.
The hydraulic transformer 13 is single rod piston cylinder or is made of the pump motor that two main shafts are connected.
The ratio range that the transformation ratio of the hydraulic transformer 13 is denoted as K2, K2 and K1 is 0.9~1.1.
Advantage of the present invention and good effect are：
Working cylinder is high using two fluid-control one-way valve compensation asymmetry flows, energy efficiency in heavy duty and load stabilization operating mode；
In cycling alternating load, asymmetric flow is compensated using hydraulic transformer, makes the oil outlet flow of main pump consistent with oil inlet flow,
Working cylinder good operation stability, avoids that velocity jump occurs.The technical solution is ripe, cost is relatively low, and reliability is high, anti-alternation is born
It is good to carry characteristic.
Brief description of the drawings
Fig. 1 is the hydraulic circuit diagram schematic diagram of the single rod piston cylinder of pump control.
Fig. 2 is the hydraulic circuit diagram schematic diagram of the embodiment 1 of the single rod piston cylinder of pump control.
Fig. 3 is the hydraulic circuit diagram schematic diagram of the embodiment 2 of the single rod piston cylinder of pump control.
In figure：1- prime mover, 2- main pumps, 3- slippage pumps, the first low pressure relief valves of 4-, the first hydraulic control one-way valves of 5-, 6-
Two hydraulic control one-way valves, the first safety valves of 7-, the second safety valves of 8-, 9- shuttle valves, the second low pressure relief valves of 10-, 11- working cylinders, 12-
High-pressure reversing valve, 13- hydraulic transformers.
Embodiment
Embodiment 1
As shown in Fig. 2, include prime mover 1, main pump 2, slippage pump 3, first, second low pressure relief valve, 4,10, first, second liquid
Control 5,6, first, second safety valve 7 of check valve, 8, shuttle valve 9, working cylinder 11, high-pressure reversing valve 12, hydraulic transformer 13, fuel tank,
Controller,；
Prime mover 1, main pump 2, slippage pump 3, first, second low pressure relief valve, 4,10, first, second hydraulic control one-way valve 5,6,
First, the second safety valve 7,8, shuttle valve 9, working cylinder 11, high-pressure reversing valve 12, hydraulic transformer 13, fuel tank, controller, it is connected
Relation is that the main shaft of prime mover 1, main pump 2 and slippage pump 3 is connected, and the Pa mouths of main pump 2 are fuel-displaced with the first hydraulic control one-way valve 5
The of mouth, the hydraulic control mouth of the second hydraulic control one-way valve 6, the oil outlet of the first safety valve 7, the oil inlet of the second safety valve 8, shuttle valve 9
One hydraulic fluid port and the connection of the first control mouth, the Pb mouths of main pump 2 and the oil outlet of the second hydraulic control one-way valve 6, the first hydraulic control one-way valve 5
Hydraulic control mouth, the oil inlet of the first safety valve 7, the oil outlet of the second safety valve 8, the second hydraulic fluid port of shuttle valve 9 and the second control mouth connect
Logical, the oil inlet of the oil outlet of slippage pump 3 and the first low pressure relief valve 4, the oil inlet of first, second hydraulic control one-way valve 5,6 connect
Logical, the 3rd hydraulic fluid port of shuttle valve 9 is connected with the oil inlet of the second low pressure relief valve 10, the oil inlet of slippage pump 3, first, second low
The oil outlet of pressurized overflow valve 4,10 is connected with fuel tank；
P mouth of first, second working chamber of working cylinder 11 respectively with Pa mouthfuls of main pump, high-pressure reversing valve 12 connects, high-pressure reversing valve
12 T mouths are connected with the Pb mouths of main pump 2, the A mouths of high-pressure reversing valve 12, B mouthfuls respectively the A mouths with hydraulic transformer 13, B mouthfuls even
It is logical；
Prime mover 1 is free from the common motor of revolution speed control device；
Main pump 2 is electronically controlled two-way variable-displacement pump motor；
First, second working chamber of working cylinder 11 is respectively effective work of plunger shaft and rod end chamber, plunger shaft and rod end chamber
The ratio for making area is denoted as K1, K1=2；
High-pressure reversing valve 12 is two four-way electromagnetic reversing valves, and the right working position of high-pressure reversing valve 12 is M shape slide valve functions, Zuo Gong
The P mouths for making position are connected with A mouthfuls, T mouthfuls connected with B mouthfuls；
Hydraulic transformer 13 is single rod piston cylinder, and the transformation ratio of hydraulic transformer 13 is denoted as K2, and K2 is equal to 2；
The executing agencies such as excavator swing arm working cylinder, have relatively stable load behavior, only when starting or braking shorter
Between in section, cycling alternating load occurs in the plunger shaft of working cylinder, rod end chamber, is adapted to use the technical solution in embodiment 1, when
Excavator swing arm cylinder is in heavy duty and during load stabilization operating mode, and high-pressure reversing valve 12 is in right working position, at this time whole circuit according to
Asymmetric flow is compensated by first, second hydraulic control one-way valve 5,6, has the advantages that energy efficiency is high；At excavator swing arm cylinder
In starting or during braking shorter time period, the plunger shaft of working cylinder 11, rod end chamber are if there is cycling alternating load, high-pressure reversing valve
12 are in left working position, the piston of the plunger shaft of hydraulic transformer 13, rod end chamber the Pb mouths with main pump 2, working cylinder 11 respectively
Rod cavity compensates asymmetric flow with connecting, by hydraulic transformer 13, and fast response time, 11 good operation stability of working cylinder, keeps away
Exempt from that velocity jump occurs；
Embodiment 2
As shown in figure 3, include prime mover 1, main pump 2, slippage pump 3, first, second low pressure relief valve, 4,10, first, second liquid
Control 5,6, first, second safety valve 7 of check valve, 8, shuttle valve 9, working cylinder 11, high-pressure reversing valve 12, hydraulic transformer 13, fuel tank,
Controller,；
Prime mover 1, main pump 2, slippage pump 3, first, second low pressure relief valve, 4,10, first, second hydraulic control one-way valve 5,6,
First, the second safety valve 7,8, shuttle valve 9, working cylinder 11, high-pressure reversing valve 12, hydraulic transformer 13, fuel tank, controller, it is connected
Relation is that the main shaft of prime mover 1, main pump 2 and slippage pump 3 is connected, and the Pa mouths of main pump 2 are fuel-displaced with the first hydraulic control one-way valve 5
The of mouth, the hydraulic control mouth of the second hydraulic control one-way valve 6, the oil outlet of the first safety valve 7, the oil inlet of the second safety valve 8, shuttle valve 9
One hydraulic fluid port and the connection of the first control mouth, the Pb mouths of main pump 2 and the oil outlet of the second hydraulic control one-way valve 6, the first hydraulic control one-way valve 5
Hydraulic control mouth, the oil inlet of the first safety valve 7, the oil outlet of the second safety valve 8, the second hydraulic fluid port of shuttle valve 9 and the second control mouth connect
Logical, the oil inlet of the oil outlet of slippage pump 3 and the first low pressure relief valve 4, the oil inlet of first, second hydraulic control one-way valve 5,6 connect
Logical, the 3rd hydraulic fluid port of shuttle valve 9 is connected with the oil inlet of the second low pressure relief valve 10, the oil inlet of slippage pump 3, first, second low
The oil outlet of pressurized overflow valve 4,10 is connected with fuel tank；
P mouth of the plunger shaft and rod end chamber of working cylinder 11 respectively with Pa mouthfuls of main pump, high-pressure reversing valve 12 connects, high-pressure reversing valve
12 T mouths are connected with the Pb mouths of main pump 2, the A mouths of high-pressure reversing valve 12, B mouthfuls respectively the A mouths with hydraulic transformer 13, B mouthfuls even
Logical, the T mouths of hydraulic transformer 13 are connected with fuel tank；
Prime mover 1 is free from the common motor of revolution speed control device；
Main pump 2 is electronically controlled two-way variable-displacement pump motor；
First, second working chamber of working cylinder 11 is respectively effective work of plunger shaft and rod end chamber, plunger shaft and rod end chamber
The ratio for making area is denoted as K1, K1=2；
High-pressure reversing valve 12 is two four-way electromagnetic reversing valves, and the right working position of high-pressure reversing valve 12 is M shape slide valve functions, Zuo Gong
The P mouths for making position are connected with A mouthfuls, T mouthfuls connected with B mouthfuls；
Hydraulic transformer 13 is made of the joining constant flow pump motor of two main shafts, and the transformation ratio of hydraulic transformer 13 is denoted as
K2, K2 are equal to 1.9；
The executing agencies such as excavator boom, scraper bowl working cylinder, cycling alternating load operating mode is many when underloading works, and is adapted to use embodiment
Technical solution in 2, when excavator boom cylinder is in heavy duty and load stabilization operating mode, high-pressure reversing valve 12 is in right work
, whole circuit compensates asymmetric flow by first, second hydraulic control one-way valve 5,6 at this time, has the advantages that energy efficiency is high；
When excavator boom cylinder is in frequent cycling alternating load, high-pressure reversing valve 12 is in left working position, is mended using hydraulic transformer 13
Asymmetric flow is repaid, reliability is high, avoids that velocity jump occurs.
Claims (5)
1. a kind of hydraulic circuit for pumping the single rod piston cylinder of control, it includes prime mover（1）, main pump（2）, slippage pump（3）, first,
Second low pressure relief valve（4、10）, first, second hydraulic control one-way valve（5、6）, first, second safety valve（7、8）, shuttle valve（9）, work
Make cylinder（11）, high-pressure reversing valve（12）, hydraulic transformer（13）, fuel tank, controller, its connection relation is prime mover（1）, main pump
（2）And slippage pump（3）Main shaft be connected, main pump（2）Pa mouths and the first hydraulic control one-way valve（5）Oil outlet, the second hydraulic control
Check valve（6）Hydraulic control mouth, the first safety valve（7）Oil outlet, the second safety valve（8）Oil inlet, shuttle valve（9）First oil
Mouth is connected with the first control mouth, main pump（2）Pb mouths and the second hydraulic control one-way valve（6）Oil outlet, the first hydraulic control one-way valve（5）
Hydraulic control mouth, the first safety valve（7）Oil inlet, the second safety valve（8）Oil outlet, shuttle valve（9）The second hydraulic fluid port and second
Control mouth connects, slippage pump（3）Oil outlet and the first low pressure relief valve（4）Oil inlet, first, second hydraulic control one-way valve
（5）、（6）Oil inlet connection, shuttle valve（9）The 3rd hydraulic fluid port and the second low pressure relief valve（10）Oil inlet connection, slippage pump
（3）Oil inlet, first, second low pressure relief valve（4）、（10）Oil outlet connected with fuel tank, it is characterized in that：The work
Cylinder（11）First, second working chamber respectively with Pa mouthfuls of main pump, high-pressure reversing valve（12）P mouths connection, high-pressure reversing valve（12）
T mouths and main pump（2）Pb mouths connection, high-pressure reversing valve（12）A mouths, B mouthfuls respectively with hydraulic transformer（13）A mouths, B mouthfuls
Connection.
2. the hydraulic circuit of the single rod piston cylinder of pump control as claimed in claim 1, it is characterized in that the working cylinder（11）For list
Rod piston cylinder, working cylinder（11）The ratio of effective work area of first, second working chamber be denoted as K1, K1 ≠ 1.
3. the hydraulic circuit of the single rod piston cylinder of pump control as claimed in claim 1, it is characterized in that the high-pressure reversing valve
（12）Four-way reversing valve, at least with two working positions, the first working position is M shape slide valve functions, the P mouths of the second working position with
A mouthfuls connection, T mouthfuls connected with B mouthfuls.
4. the hydraulic circuit of the single rod piston cylinder of pump control as claimed in claim 1, it is characterized in that the hydraulic transformer
（13）Formed for single rod piston cylinder or by the pump motor that two main shafts are connected.
5. the hydraulic circuit of the single rod piston cylinder of pump control as described in claim 1 or 2 or 4, it is characterized in that the hydraulic pressure becomes
Depressor（13）Transformation ratio be denoted as K2, K2 and K1 ratio range be 0.9~1.1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711225639.XA CN108035921A (en) | 2017-11-29 | 2017-11-29 | A kind of hydraulic circuit for pumping the single rod piston cylinder of control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711225639.XA CN108035921A (en) | 2017-11-29 | 2017-11-29 | A kind of hydraulic circuit for pumping the single rod piston cylinder of control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108035921A true CN108035921A (en) | 2018-05-15 |
Family
ID=62094420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711225639.XA Pending CN108035921A (en) | 2017-11-29 | 2017-11-29 | A kind of hydraulic circuit for pumping the single rod piston cylinder of control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108035921A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463846A (en) * | 2009-01-13 | 2009-06-24 | 太原科技大学 | Hydraulic system of full-hydraulic metal sheet straightener |
| CN103397677A (en) * | 2013-08-09 | 2013-11-20 | 太原科技大学 | Hydraulic excavator movable arm loop based on hydraulic transformer and control method thereof |
| US20150176611A1 (en) * | 2013-12-19 | 2015-06-25 | Hangcha Group Co., Ltd. | Load sensing electric-proportional multi-way valve |
| JP2015518945A (en) * | 2012-05-31 | 2015-07-06 | プッツマイスター エンジニアリング ゲーエムベーハー | Hydraulic system |
| CN105090144A (en) * | 2015-09-14 | 2015-11-25 | 太原科技大学 | Pre-loaded large-applied-force hydraulic system |
| CN107288946A (en) * | 2017-07-13 | 2017-10-24 | 太原科技大学 | A kind of hydraulic circuit of pump control asymmetrical cylinder |
| CN107327432A (en) * | 2017-08-25 | 2017-11-07 | 太原科技大学 | A kind of pump control cylinder hydraulic circuit and its control method |
-
2017
- 2017-11-29 CN CN201711225639.XA patent/CN108035921A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463846A (en) * | 2009-01-13 | 2009-06-24 | 太原科技大学 | Hydraulic system of full-hydraulic metal sheet straightener |
| JP2015518945A (en) * | 2012-05-31 | 2015-07-06 | プッツマイスター エンジニアリング ゲーエムベーハー | Hydraulic system |
| CN103397677A (en) * | 2013-08-09 | 2013-11-20 | 太原科技大学 | Hydraulic excavator movable arm loop based on hydraulic transformer and control method thereof |
| US20150176611A1 (en) * | 2013-12-19 | 2015-06-25 | Hangcha Group Co., Ltd. | Load sensing electric-proportional multi-way valve |
| CN105090144A (en) * | 2015-09-14 | 2015-11-25 | 太原科技大学 | Pre-loaded large-applied-force hydraulic system |
| CN107288946A (en) * | 2017-07-13 | 2017-10-24 | 太原科技大学 | A kind of hydraulic circuit of pump control asymmetrical cylinder |
| CN107327432A (en) * | 2017-08-25 | 2017-11-07 | 太原科技大学 | A kind of pump control cylinder hydraulic circuit and its control method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20180515 |