CN205329745U - Two operation mode control systems of leveler - Google Patents
Two operation mode control systems of leveler Download PDFInfo
- Publication number
- CN205329745U CN205329745U CN201520981580.7U CN201520981580U CN205329745U CN 205329745 U CN205329745 U CN 205329745U CN 201520981580 U CN201520981580 U CN 201520981580U CN 205329745 U CN205329745 U CN 205329745U
- Authority
- CN
- China
- Prior art keywords
- valve
- oil
- pipeline
- hydraulic
- hydraulic circuit
- 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.)
- Active
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model belongs to the technical field of the engineering machine tool, especially, relate to a two operation mode control systems of leveler. Including turning to hydraulic circuit, braking hydraulic circuit, left operation hydraulic circuit and right operation hydraulic circuit, turn to wherein that hydraulic circuit includes the steering pump, turns to the pressure -gradient control valve, steering gear and turn to the pneumatic cylinder, braking hydraulic circuit includes that brake pump, prefill valve, braking foot step on valve, braking energy storage ware and brake hydraulic cylinder about, and operation hydraulic circuit includes respective operation pump, operating valve and a plurality of executor, still include the model selection valve, the EF mouth that turns to the pressure -gradient control valve passes through tube coupling to model selection valve, and the rethread tube coupling is the oil inlet of right operating valve extremely, and the N mouth of prefill valve passes through the oil inlet of tube coupling to model selection valve, rethread tube coupling to left operating valve. Through above -mentioned model selection valve, the double mode operation of leveler operating system has been realized, promptly the accurate operation mode of large -traffic sharp work and low discharge.
Description
Technical field
This utility model belongs to technical field of engineering machinery, particularly relates to a kind of land leveller double cropping industry schema control system。
Background technology
In engineering machinery adopt be independent turn to, brake, operation hydraulic circuit。Three hydraulic circuits provide power source (the pumps in series essence that current land leveller adopts also is that two or more independent hydraulically controlled series connection of pumps forms) by independent hydraulic pump。There is engine power and use insufficient, each hydraulic system cannot the situation such as collaborative work and Partial Power waste in this separate hydraulic circuit, it is impossible to realizes the conversion of land leveller multi-operation mode。This utility model be existing land leveller independent brake pump, steering pump, working barrel hydraulic circuit basis on, assembled hydraulic valve element is used to solve the collaborative work of many pumps, it is achieved two kinds of flow pressure patterns of operation hydraulic circuit--the i.e. double mode lower work of big flow low pressure and small flow high pressure pattern。
Utility model content
This utility model provides a kind of land leveller double cropping industry schema control system for solving the technical problem of existence in known technology, realize the double mode lower work of two kinds of flow pressure patterns of operation hydraulic circuit (i.e. big flow low pressure and the work of small flow high pressure pattern), reduce complete machine hydraulic pressure installed power, improve cylinder efficient speed, improve maximum working pressure (MWP)。
This utility model is adopted the technical scheme that by the technical problem solving to exist in known technology: a kind of land leveller double cropping industry schema control system includes steering hydraulic loop, braking hydraulic circuit, left operation hydraulic circuit and right operation hydraulic circuit；
Steering hydraulic loop includes steering pump, turning gradient control valve, steering gear and hydraulic steering cylinder, the oil-in of steering pump is connected to hydraulic oil container, oil-out by pipeline and is connected to the oil-in of turning gradient control valve by pipeline, the oil-out of turning gradient control valve is connected to the oil-in of steering gear by pipeline, and the oil-out of steering gear is connected to hydraulic steering cylinder by pipeline；
Braking hydraulic circuit includes brake pump, replenishing valve, braking foot valve, brake accumulator and brake fluid cylinder pressure, the oil-in of brake pump is connected to hydraulic oil container, oil-out by pipeline and is connected to the oil-in of replenishing valve by pipeline, the oil-out of replenishing valve is connected to the oil-in of brake accumulator by pipeline, the oil-out of brake accumulator is connected to brake fluid cylinder pressure by pipeline, and braking foot valve is connected on the pipeline between the oil-out of replenishing valve and the oil-in of brake accumulator；
Left operation hydraulic circuit includes left valve operation pump, left manipulation valve and multiple left executor, the oil-in of left valve operation pump is connected to hydraulic oil container, oil-out by pipeline and is connected to the oil-in of left manipulation valve by pipeline, and the oil-out of left manipulation valve is connected to each left executor by pipeline；
Right operation hydraulic circuit includes right valve operation pump, right manipulation valve and multiple right executor, the oil-in of right valve operation pump is connected to hydraulic oil container, oil-out by pipeline and is connected to the oil-in of right manipulation valve by pipeline, and the oil-out of right manipulation valve is connected to each right executor by pipeline；
Also including model selection valve, the EF mouth of turning gradient control valve is connected to model selection valve by pipeline, is connected to the oil-in of right manipulation valve again through pipeline, and the N mouth of replenishing valve is connected to model selection valve by pipeline, is connected to the oil-in of left manipulation valve again through pipeline。
Advantage of the present utility model and have the benefit effect that this utility model provides the land leveller double cropping industry schema control system of a kind of reasonable in design, compared with existing control system, this system be turn to, brake, the open type hydraulic system of operation hydraulic circuit independent oil supply。By increasing model selection valve on the basis of original land leveller hydraulic system to realize land leveller operating system is realized dual mode operation, dual mode operation can realize big flow sharp work and the accurate work pattern of low discharge。Owing to this system achieves the interflow operation of steering and brakes so operation pump delivery can be reduced when total installation flow is constant, both can improve operational pressure and also can reduce the installed power of complete machine hydraulic system simultaneously, reach energy-conservation effect。The advantages such as model selection valve has simple in construction, volume is little, integrated level is high, convenient installation maintenance。
Preferably: model selection valve includes two groups of solenoid directional control valves being set up in parallel, overflow valve and check valve, one of which solenoid directional control valve, overflow valve and check valve are between the EF mouth and the oil-in of right manipulation valve of turning gradient control valve, and another group solenoid directional control valve, overflow valve and check valve are between the N mouth and the oil-in of left manipulation valve of replenishing valve。
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model。
In figure: 1, hydraulic oil container；2, steering pump；3, brake pump；4, left valve operation pump；5, right valve operation pump；6, turning gradient control valve；7, steering gear；8, hydraulic steering cylinder；9, model selection valve；9.1, solenoid directional control valve；9.2, overflow valve；9.3, check valve；10, replenishing valve；11, braking foot valve；12, brake accumulator；13, brake fluid cylinder pressure；14, left manipulation valve；15, right manipulation valve；16, left executor；17, right executor。
Detailed description of the invention
For summary of the invention of the present utility model, feature and effect can be further appreciated that, hereby lift following example and describe in detail as follows:
Refer to Fig. 1, the used open type hydraulic system of this utility model, including steering hydraulic loop, braking hydraulic circuit, left operation hydraulic circuit and right operation hydraulic circuit, wherein steering hydraulic loop is used for controlling land leveller and turns to, braking hydraulic circuit is used for controlling land leveller braking, and two operation hydraulic circuits are for controlling the apparatus for work of land leveller。
Steering hydraulic loop includes steering pump 2, turning gradient control valve 6, steering gear 7 and hydraulic steering cylinder 8, the oil-in of steering pump 2 is connected to hydraulic oil container 1, oil-out by pipeline and is connected to the oil-in of turning gradient control valve 6 by pipeline, the oil-out of turning gradient control valve 6 is connected to the oil-in of steering gear 7 by pipeline, and the oil-out of steering gear 7 is connected to hydraulic steering cylinder 8 by pipeline。
Braking hydraulic circuit includes brake pump 3, replenishing valve 10, braking foot valve 11, brake accumulator 12 and brake fluid cylinder pressure 13, the oil-in of brake pump 3 is connected to hydraulic oil container 1, oil-out by pipeline and is connected to the oil-in of replenishing valve 10 by pipeline, the oil-out of replenishing valve 10 is connected to the oil-in of brake accumulator 12 by pipeline, the oil-out of brake accumulator 12 is connected to brake fluid cylinder pressure 13 by pipeline, and braking foot valve 11 is connected on the pipeline between the oil-out of replenishing valve 10 and the oil-in of brake accumulator 12。
Left operation hydraulic circuit includes left valve operation pump 4, left manipulation valve 14 and multiple left executor 16, the oil-in of left valve operation pump 4 is connected to hydraulic oil container 1, oil-out by pipeline and is connected to the oil-in of left manipulation valve 14 by pipeline, and the oil-out of left manipulation valve 14 is connected to each left executor 16 by pipeline。
Right operation hydraulic circuit includes right valve operation pump 5, right manipulation valve 15 and multiple right executor 17, the oil-in of right valve operation pump 5 is connected to hydraulic oil container 1, oil-out by pipeline and is connected to the oil-in of right manipulation valve 15 by pipeline, and the oil-out of right manipulation valve 15 is connected to each right executor 17 by pipeline。
Also include model selection valve 9, the EF mouth of turning gradient control valve 6 is connected to model selection valve 9 by pipeline, be connected to the oil-in of right manipulation valve 15 again through pipeline, the N mouth of replenishing valve 10 is connected to model selection valve 9 by pipeline, is connected to the oil-in of left manipulation valve 14 again through pipeline。
In the present embodiment, model selection valve 9 includes two groups of solenoid directional control valves being set up in parallel 9.1, overflow valve 9.2 and check valve 9.3, one of which solenoid directional control valve 9.1, overflow valve 9.2 and check valve 9.3 are between the EF mouth and the oil-in of right manipulation valve 15 of turning gradient control valve 6, and another group solenoid directional control valve 9.1, overflow valve 9.2 and check valve 9.3 are between the N mouth and the oil-in of left manipulation valve 14 of replenishing valve 10。
Work process:
Steering pump 2, from hydraulic oil container 1 oil suction, forms steering hydraulic loop by turning gradient control valve 6, steering gear 7 and hydraulic steering cylinder 8。Brake pump 3, from hydraulic oil container 1 oil suction, is brake accumulator 12 topping up by replenishing valve 10, and the pressure of brake accumulator 12 is exported and forms braking hydraulic circuit to wheel limit brake fluid cylinder pressure 13 by braking foot valve 11。Left valve operation pump 4 and right valve operation pump 5, from hydraulic oil container 1 oil suction, provide power to form two the operation hydraulic circuits in left and right respectively through left manipulation valve 14 and right manipulation valve 15 for left executor 16 and right executor 17。
The pressure oil that steering pump 2 provides when without go to action enters into model selection valve 9 by the EF mouth output of turning gradient control valve 6。Same after brake pump 3 completes the filling process of brake accumulator 12, the pressure oil that brake pump 3 provides enters into model selection valve 9 by the N mouth output of replenishing valve 10。
When electromagnetic valve reversal valve 9.1 dead electricity in model selection valve 9, hydraulic oil container 1 is flowed back in the steering pressure oil of Dietary behavior selector valve 9 and the off-load then non-loadedly of brake pressure oil, now the hydraulic oil of steering pump 2 and brake pump 3 output is not involved in the interflow of operation hydraulic system, and land leveller is in the fine manipulation pattern that only left valve operation pump 4, right valve operation pump 5 participate in。
When the solenoid directional control valve 9.1 in model selection valve 9 electric work time, solenoid directional control valve 9.1 has cut off the steering fluid of Dietary behavior selector valve 9 and brakes fluid flows back to the path of hydraulic oil container 1。The pressure oil that the pressure oil of steering pump 2 and brake pump 3 output exports with right valve operation pump 5 and left valve operation pump 4 respectively is made to form interflow。Now land leveller operation hydraulic system adds working flow, and land leveller is in big flow sharp work pattern。
Overflow valve 9.2 pressure set points in model selection valve 9 is less than operation hydraulic system maximum working pressure。When big flow sharp work MODE of operation, when actuator campaign is in end or runs into bigger resistance to when making the rising of hydraulic system of working pressure reach overflow valve 9.2 setting value, off-load opened by overflow valve 9.2 in model selection valve 9 under the feedback effect of the downstream pressure signal of check valve 9.3, and hydraulic oil container 1 is flowed back in the now steering pressure oil of inflow pattern selector valve 9 and brake system pressure oil off-load。Operation hydraulic system is only continued fuel feeding by left valve operation pump 4 and right valve operation pump 5, and pressure continues to rise, and land leveller operation hydraulic system has automatically switched in small flow high pressure work pattern, so can effectively protect steering and brakes。Automatically adjust flow according to load change and pressure also can effectively utilize engine power, it is prevented that overload and power dissipation。
In this system, turning gradient control valve 6 ensures preferentially to ensure the pressure oil supply of steering when vehicle has and turns to demand, and replenishing valve 10 also preferentially ensure that the reservation for pressure of brake accumulator 12 in brakes。
Claims (2)
1. a land leveller double cropping industry schema control system, is characterized in that: include steering hydraulic loop, braking hydraulic circuit, left operation hydraulic circuit and right operation hydraulic circuit；
Steering hydraulic loop includes steering pump (2), turning gradient control valve (6), steering gear (7) and hydraulic steering cylinder (8), the oil-in of steering pump (2) is connected to hydraulic oil container (1), oil-out by pipeline and is connected to the oil-in of turning gradient control valve (6) by pipeline, the oil-out of turning gradient control valve (6) is connected to the oil-in of steering gear (7) by pipeline, and the oil-out of steering gear (7) is connected to hydraulic steering cylinder (8) by pipeline；
Braking hydraulic circuit includes brake pump (3), replenishing valve (10), braking foot valve (11), brake accumulator (12) and brake fluid cylinder pressure (13), the oil-in of brake pump (3) is connected to hydraulic oil container (1) by pipeline, oil-out is connected to the oil-in of replenishing valve (10) by pipeline, the oil-out of replenishing valve (10) is connected to the oil-in of brake accumulator (12) by pipeline, the oil-out of brake accumulator (12) is connected to brake fluid cylinder pressure (13) by pipeline, braking foot valve (11) is connected on the pipeline between the oil-out of replenishing valve (10) and the oil-in of brake accumulator (12)；
Left operation hydraulic circuit includes left valve operation pump (4), left manipulation valve (14) and multiple left executor (16), the oil-in of left valve operation pump (4) is connected to hydraulic oil container (1), oil-out by pipeline and is connected to the oil-in of left manipulation valve (14) by pipeline, and the oil-out of left manipulation valve (14) is connected to each left executor (16) by pipeline；
Right operation hydraulic circuit includes right valve operation pump (5), right manipulation valve (15) and multiple right executor (17), the oil-in of right valve operation pump (5) is connected to hydraulic oil container (1), oil-out by pipeline and is connected to the oil-in of right manipulation valve (15) by pipeline, and the oil-out of right manipulation valve (15) is connected to each right executor (17) by pipeline；
Also include model selection valve (9), the EF mouth of turning gradient control valve (6) is connected to model selection valve (9) by pipeline, the oil-in of right manipulation valve (15) it is connected to again through pipeline, the N mouth of replenishing valve (10) is connected to model selection valve (9) by pipeline, is connected to the oil-in of left manipulation valve (14) again through pipeline。
2. land leveller double cropping industry schema control system as claimed in claim 1, it is characterized in that: model selection valve (9) includes two groups of solenoid directional control valves being set up in parallel (9.1), overflow valve (9.2) and check valve (9.3), one of which solenoid directional control valve (9.1), overflow valve (9.2) and check valve (9.3) are positioned between the EF mouth of turning gradient control valve (6) and the oil-in of right manipulation valve (15), another group solenoid directional control valve (9.1), overflow valve (9.2) and check valve (9.3) are positioned between the N mouth of replenishing valve (10) and the oil-in of left manipulation valve (14)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520981580.7U CN205329745U (en) | 2015-12-01 | 2015-12-01 | Two operation mode control systems of leveler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520981580.7U CN205329745U (en) | 2015-12-01 | 2015-12-01 | Two operation mode control systems of leveler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205329745U true CN205329745U (en) | 2016-06-22 |
Family
ID=56213843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520981580.7U Active CN205329745U (en) | 2015-12-01 | 2015-12-01 | Two operation mode control systems of leveler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205329745U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109533018A (en) * | 2018-11-26 | 2019-03-29 | 雷沃重工股份有限公司 | Farm equipment hydraulic system and farm equipment |
| US10920396B1 (en) | 2019-07-31 | 2021-02-16 | Caterpillar Inc. | Hydraulic system for a motor grader |
-
2015
- 2015-12-01 CN CN201520981580.7U patent/CN205329745U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109533018A (en) * | 2018-11-26 | 2019-03-29 | 雷沃重工股份有限公司 | Farm equipment hydraulic system and farm equipment |
| US10920396B1 (en) | 2019-07-31 | 2021-02-16 | Caterpillar Inc. | Hydraulic system for a motor grader |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105221497A (en) | High speed pre-shaping hydraulic press hydraulic control system | |
| CN104029721B (en) | Loader hydraulic transfer | |
| CN107268703B (en) | Hydraulic system of loader | |
| CN104929992A (en) | Energy-saving design method for variable-load servo control system | |
| CN104196806A (en) | Synchronizing circuit of flow distributing and collecting valve for two-column gantry lifter | |
| CN205329745U (en) | Two operation mode control systems of leveler | |
| CN102943500A (en) | Energy-saving control method of hydraulic negative flow of excavator | |
| CN204284032U (en) | Single actuator automatic switchover rapid movement oil hydraulic circuit | |
| CN206467707U (en) | A kind of excavator energy regenerating and utilize system | |
| CN105757016A (en) | Hydraulic control system of supercharging device | |
| CN203384136U (en) | Speed exchange circuit with parallel speed control valves | |
| CN201776935U (en) | Hydraulic machine with two sets of hydraulic system structures | |
| CN203130636U (en) | Engineering machinery equipment and hydraulic control loop thereof | |
| CN104481940A (en) | Hydraulic yawing brake system of wind driven generator | |
| CN103671295A (en) | Closed energy storage hydraulic system | |
| CN204873719U (en) | Quick -witted hydraulic control system lifts | |
| CN204533014U (en) | Ioad-sensing control hydraulic system | |
| CN204587015U (en) | A kind of crawler type field machine fluid-link steering and brake integrated system | |
| CN203770276U (en) | Double-way oil supply priority valve | |
| CN103114624B (en) | The load-sensitive control system of loader | |
| CN203174660U (en) | Load-sensitive control system of loading machine | |
| CN104476741A (en) | Oil hydraulic circuit for synchronously controlling mould locking oil cylinder and mould transferring oil cylinder of injection molding machine | |
| CN203384138U (en) | Speed exchange circuit with serially-connected speed control valves | |
| CN203488471U (en) | Novel hydraulic distribution device for load sensing control hydraulic system | |
| CN202767158U (en) | Hydraulic excavator flow out of valve regenerating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |