CN111810478A - Priority flow control system based on feeding device of compression vehicle - Google Patents
Priority flow control system based on feeding device of compression vehicle Download PDFInfo
- Publication number
- CN111810478A CN111810478A CN202010807007.XA CN202010807007A CN111810478A CN 111810478 A CN111810478 A CN 111810478A CN 202010807007 A CN202010807007 A CN 202010807007A CN 111810478 A CN111810478 A CN 111810478A
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- Prior art keywords
- pump
- valve
- oil
- feeding device
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- Pending
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- 230000006835 compression Effects 0.000 title claims abstract description 15
- 238000007906 compression Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 58
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- 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
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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
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
- F15B2211/20584—Combinations of pumps with high and low capacity
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/88—Control measures for saving energy
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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)
Abstract
The invention discloses a priority flow control system based on a feeding device of a compression vehicle, and belongs to the technical field of transmission systems of sanitation vehicles. The device comprises a duplex pump, wherein a large pump in the duplex pump is connected with a large pump oil supply circuit, and a small pump in the duplex pump is connected with a feeding device oil cylinder; the small pump is connected with a priority valve; the oil outlet of the priority valve is respectively connected with the one-way valve and the proportional valve; the check valve is connected with the large pump oil supply path; the proportional valve is connected with the feeding device oil cylinder. According to the invention, the flow of the small pump is preferentially supplied to the feeding device, and the redundant flow bypasses the large pump oil supply loop, so that the use efficiency of the duplex pump is exerted to the maximum extent, and the working efficiency of the large pump oil supply loop is improved; the speed stability when different loading attachment movements can be guaranteed to same hydraulic system, and no throttle loss has improved system power utilization, has also improved the unified degree of system simultaneously, reduces the system configuration.
Description
Technical Field
The invention relates to the technical field of transmission systems of sanitation vehicles, in particular to a priority flow control system based on a feeding device of a compression vehicle.
Background
The compression type garbage truck can be compressed at one time, the compression force is large, the loading capacity is improved, the loading, the compression, the sealed transportation and the self-unloading are integrated, the automation degree is high, the carrying capacity is high, the transportation cost is reduced, and the compression type garbage truck is deeply popular with the wide environmental sanitation departments.
At present, most of compression vehicle hydraulic systems in the industry supply oil through a duplex pump, a large pump supplies oil to large-flow loops such as a scraper plate, a sliding plate and a push plate, a small pump supplies oil to a feeding device loop, synchronous operation of garbage compression and feeding is achieved, and loading efficiency is improved. When the feeding device does not act in the garbage collection operation process, the oil way of the small pump is in an idle running state, the utilization rate of the pump is low, and power waste is caused to a certain extent. Meanwhile, the feeding devices in different forms have different action speeds and different flow requirements, and the same pump source has serious throttling and larger power loss when being matched with the bucket and swing arm feeding devices with smaller flow requirements.
Disclosure of Invention
In order to solve the technical problem, the invention provides a priority flow control system based on a feeding device of a compression vehicle, which improves the power utilization rate of the system by bypassing the redundant flow of a small pump to an oil supply loop of a large pump.
The invention is realized by the following technical scheme: a priority flow control system based on a feeding device of a compression vehicle comprises a duplex pump, wherein a large pump in the duplex pump is connected with a large pump oil supply oil way, and a small pump in the duplex pump is connected with an oil cylinder of the feeding device; the small pump is connected with a priority valve; the oil outlet of the priority valve is respectively connected with the one-way valve and the proportional valve; the check valve is connected with the large pump oil supply path; the proportional valve is connected with the feeding device oil cylinder.
It further comprises the following steps: the proportional valve comprises a reversing valve, an oil inlet of the reversing valve is connected with an oil outlet of the priority valve, and an oil outlet of the reversing valve is in control connection with the feeding device oil cylinder; and the rear part of the reversing valve is connected to the spring cavity of the priority valve through a load feedback oil path, and the load feedback oil path is connected with an overflow valve III.
And an oil outlet of the small pump is connected with a main overflow valve II.
And an oil outlet of the big pump is connected with a main overflow valve I.
The proportional valve is a proportional valve with compensation before or after the valve.
The invention gives play to the use efficiency of the duplex pump to the maximum extent by preferentially supplying the flow of the small pump to the feeding device and bypassing the redundant flow to the oil supply loop of the large pump, compared with the prior art, the invention has the beneficial effects that:
(1) when the small pump is in the oil supply or confluence state of the feeding device, no idle circulation state exists, and the use efficiency of the duplex pump is exerted to the maximum extent;
(2) the small pump merges the hydraulic oil to the big pump oil supply loop, and the working efficiency of the big pump oil supply loop is improved;
(3) the speed stability when different loading attachment movements can be guaranteed to same hydraulic system, and no throttle loss has improved system power utilization, has also improved the unified degree of system simultaneously, reduces the system configuration.
Drawings
FIG. 1 is a hydraulic schematic of an embodiment of the present invention;
in the figure: the system comprises a duplex pump 1, a main overflow valve I2, a priority valve 3, a one-way valve 4, a proportional valve 5 and a feeding device oil cylinder 6;
a big pump 1.1 and a small pump 1.2;
a main overflow valve II 5.1, a reversing valve 5.2 and an overflow valve III 5.3.
Detailed Description
The following is a specific embodiment of the present invention, which will be further described with reference to the accompanying drawings.
Referring to fig. 1, a priority flow control system based on a loading device of a compression vehicle is disclosed, wherein a duplex pump 1 comprises a big pump 1.1 for supplying oil to an oil path of the big pump and a small pump 1.2 for supplying oil to an oil cylinder 6 of the loading device. The oil supply circuit of the big pump mainly supplies oil to working circuits of a scraper plate, a sliding plate, a push plate, lifting and the like of the compression vehicle.
An oil outlet of the large pump 1.1 is connected with a main overflow valve I2, and the main overflow valve 2 is used for limiting the highest working pressure of an oil supply loop of the large pump 1.1 in the dual pump.
The oil outlet of the small pump 1.2 is connected with a priority valve 3. The oil outlet of the priority valve 3 is connected with a large pump oil supply loop through a one-way valve 4. The oil outlet of the priority valve 3 also supplies oil to a feeding device oil cylinder 6 through a proportional valve 5.
The proportional valve 5 comprises a main overflow valve II 5.1, a reversing valve 5.2 and an overflow valve III 5.3 in a load feedback oil path;
an oil inlet of the reversing valve 5.2 is connected with an oil outlet of the priority valve 3, and an oil outlet of the reversing valve 5.2 is connected with the oil cylinder 6 of the feeding device in a control mode;
the rear part of the reversing valve 5.2 is connected to a spring cavity of the priority valve 3 through a load feedback oil path, and the load feedback oil path is connected with an overflow valve 5.3;
an oil outlet of the small pump 1.2 is connected with a main overflow valve II 5.1.
The working principle is as follows:
when the vehicle operates and the feeding device does not act, the priority valve 3 is in the left position, all oil of the small pump 1.2 flows into the oil supply loop of the large pump 1.1 through the priority valve 3 and the check valve 4, and the working efficiency of the oil supply loop of the large pump is improved;
when the loading device is operated, the flow of the small pump 1.2 is output to the loading device oil cylinder 6 through the priority valve 3 according to the control flow of the opening degree of the proportional valve 5.2, and the residual flow is converged to the oil supply loop of the large pump 1.1;
different control current is given to different feeding devices such as a bucket turning device, a bucket and a swing arm to control different over-flow of the reversing valve 5.2, and the stability of the action speeds of the different feeding devices is guaranteed. The redundant flow is bypassed to the large pump 1.1 oil supply loop, so that the throttling loss is avoided, and the power utilization rate of the system is improved.
As can be seen from the above embodiments, in the present embodiment, by arranging the priority flow control valve in the small pump oil outlet path, when the feeding device operates, the flow passing rate of the feeding device is preferentially ensured, and the redundant flow bypasses and merges to the large pump oil supply loop. When the feeding device does not work, the oil flow of the small pump is totally merged to the oil supply loop of the large pump, so that the working efficiency of the oil supply loop of the large pump is improved, and the use efficiency of the duplex pump is exerted to the greatest extent. And when the same hydraulic system is matched with different feeding devices, parameters of the proportional valve are adjusted, the stability of the action speeds of the different feeding devices is ensured, the redundant flow bypasses a large pump oil supply loop, no throttling loss exists, and the power utilization rate of the system is improved.
The skilled person should understand that: although the invention has been described in terms of the above specific embodiments, the inventive concept is not limited thereto and any modification applying the inventive concept is intended to be included within the scope of the patent claims.
Claims (5)
1. A priority flow control system based on a feeding device of a compression vehicle comprises a double pump (1), wherein a large pump (1.1) in the double pump (1) is connected with a large pump oil supply oil way, and a small pump (1.2) in the double pump (1) is connected with a feeding device oil cylinder (6);
the method is characterized in that:
the small pump (1.2) is connected with a priority valve (3);
the oil outlet of the priority valve (3) is respectively connected with a one-way valve (4) and a proportional valve (5);
the check valve (4) is connected with the oil supply circuit of the big pump;
the proportional valve (5) is connected with the feeding device oil cylinder (6).
2. The system of claim 1, wherein the system comprises: the proportional valve (5) comprises a reversing valve (5.2), an oil inlet of the reversing valve (5.2) is connected with an oil outlet of the priority valve (3), and an oil outlet of the reversing valve (5.2) is connected with the feeding device oil cylinder (6) in a control mode; and the rear part of the reversing valve (5.2) is connected to a spring cavity of the priority valve (3) through a load feedback oil path, and the load feedback oil path is connected with an overflow valve III (5.3).
3. The system of claim 1, wherein the system comprises: an oil outlet of the small pump (1.2) is connected with a main overflow valve II (5.1).
4. The system of claim 1, wherein the system comprises: an oil outlet of the large pump (1.1) is connected with a main overflow valve I (2).
5. The system of claim 1, wherein the system comprises: the proportional valve (5) is a proportional valve with compensation before or after the valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010807007.XA CN111810478A (en) | 2020-08-12 | 2020-08-12 | Priority flow control system based on feeding device of compression vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010807007.XA CN111810478A (en) | 2020-08-12 | 2020-08-12 | Priority flow control system based on feeding device of compression vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111810478A true CN111810478A (en) | 2020-10-23 |
Family
ID=72860379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010807007.XA Pending CN111810478A (en) | 2020-08-12 | 2020-08-12 | Priority flow control system based on feeding device of compression vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111810478A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357210A (en) * | 2021-06-28 | 2021-09-07 | 三一汽车起重机械有限公司 | Cylinder arm pin hydraulic control system with flow compensation function and operation machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094855A (en) * | 2010-12-28 | 2011-06-15 | 徐州重型机械有限公司 | Wheel type engineering machinery hydraulic control system and wheeled crane applying same |
| CN105201944A (en) * | 2015-09-25 | 2015-12-30 | 广西柳工机械股份有限公司 | Flow enlarging valve and hydraulic steering system |
| CN105422525A (en) * | 2015-11-12 | 2016-03-23 | 杭州精工液压机电制造有限公司 | Three-point hitch mechanism horizontal control system of agricultural machine |
| CN107351912A (en) * | 2017-07-12 | 2017-11-17 | 徐工集团工程机械股份有限公司 | A kind of electric hydraulic steering system and paver |
| CN107355435A (en) * | 2017-08-28 | 2017-11-17 | 福建龙马环卫装备股份有限公司 | A kind of refuse compaction equipment double-power hydraulic pumping plant system |
| CN108317112A (en) * | 2018-03-21 | 2018-07-24 | 安徽合力股份有限公司 | A kind of fork truck duplex pump steering Parking braking release hydraulic system |
-
2020
- 2020-08-12 CN CN202010807007.XA patent/CN111810478A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094855A (en) * | 2010-12-28 | 2011-06-15 | 徐州重型机械有限公司 | Wheel type engineering machinery hydraulic control system and wheeled crane applying same |
| CN105201944A (en) * | 2015-09-25 | 2015-12-30 | 广西柳工机械股份有限公司 | Flow enlarging valve and hydraulic steering system |
| CN105422525A (en) * | 2015-11-12 | 2016-03-23 | 杭州精工液压机电制造有限公司 | Three-point hitch mechanism horizontal control system of agricultural machine |
| CN107351912A (en) * | 2017-07-12 | 2017-11-17 | 徐工集团工程机械股份有限公司 | A kind of electric hydraulic steering system and paver |
| CN107355435A (en) * | 2017-08-28 | 2017-11-17 | 福建龙马环卫装备股份有限公司 | A kind of refuse compaction equipment double-power hydraulic pumping plant system |
| CN108317112A (en) * | 2018-03-21 | 2018-07-24 | 安徽合力股份有限公司 | A kind of fork truck duplex pump steering Parking braking release hydraulic system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357210A (en) * | 2021-06-28 | 2021-09-07 | 三一汽车起重机械有限公司 | Cylinder arm pin hydraulic control system with flow compensation function and operation machine |
| CN113357210B (en) * | 2021-06-28 | 2023-10-13 | 三一汽车起重机械有限公司 | Cylinder arm pin hydraulic control system with flow compensation function and working machine |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201023 |
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| RJ01 | Rejection of invention patent application after publication |