CN202789861U - Simple load sensory system - Google Patents
Simple load sensory system Download PDFInfo
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- CN202789861U CN202789861U CN201220445145.9U CN201220445145U CN202789861U CN 202789861 U CN202789861 U CN 202789861U CN 201220445145 U CN201220445145 U CN 201220445145U CN 202789861 U CN202789861 U CN 202789861U
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- valve group
- control valve
- load sensitive
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Abstract
A simple load sensory system comprises a variable pump, a system control valve group, a feedback loop, and a work executing mechanism, wherein a first component for flow adjustment is arranged between the oil outlet end of the variable pump and the oil inlet end of the system control valve group or on the system control valve group, and the first component for flow adjustment is a throttle valve. By the adoption of the utility model, system flow can be set or adjusted according to load requirements; the functions of system load pressure detection and feedback, system work pressure adjustment and safety protection, system output power matching, and control of the work executing mechanism are realized at the same time and integrated; the use of a valve group with complex system and high price is eliminated; the whole system has small loss; the overall performance is improved remarkably; the overall structure is compact; assembly and maintenance are easy to realize; and the production cost is low.
Description
Technical field
The utility model relates to engineering machinery assisting agency, particularly a kind of simple and easy load sensitive system.
Background technique
Along with more and more being subject to people, the topic of energy conservation pays close attention to the energy-conservation concern that also obtains each great institutions, research institute and company of engineering machinery.There is greater loss in engineering machinery energy in idling or the unmatched situation of power, and the wearing and tearing of consequent heating and components and parts easily cause mechanical failure.Produced thus the hydraulic system of various energy-conservation and power match, load-sensitive is exactly wherein a kind of.
Load sensitive system is generally by load sensitive pump, multi-way valve, and the components and parts such as actuator form; It is by detecting induced pressure, flow and power variable signal, and system is fed back to hydraulic pump source, realizes the controls such as energy-conservation, throttling, speed governing, pressure regulation, permanent power.Realize in addition pressure and the flow matches of hydraulic power and actuator by pressure compensation mode, substantially realized energy provide as required and the while can be finished the unequally loaded execution action.The control mode that load sensitive system adopts comprises hydraulic control and electronic control.Load sensitive system can reduce the hydraulic system energy consumption, improves construction machine productivity, improves system controllability and measurability, reduces system's oil temperature, prolongs the hydraulic system life-span.
But there is more auxiliary system for large-scale engineering machinery, its auxiliary actuator does not often require simultaneously action, only need speed is controlled, do not need the control modes such as pressure compensation this moment, therefore original load sensitive control system just exists systemic-function redundant and system complex and high in cost of production problem.
The model utility content
The purpose of this utility model is to overcome the complex structure of existing system, functional redundancy, and cost is high, and a kind of energy-conservation, operation is comfortable, cost is low simple and easy load sensitive system is provided.
A kind of simple and easy load sensitive system, comprise variable displacement pump, system control valve group, feedback loop and work actuator, be provided with the first components and parts that carry out Flow-rate adjustment between the oil inlet end of the oil outlet end of described variable displacement pump and described system control valve group or on the system control valve group.
Described the first components and parts that carry out Flow-rate adjustment are throttle valve or components and parts with throttling function.
The second components and parts with damping function are installed in the described feedback loop.
Described the second components and parts that carry out Flow-rate adjustment are throttle valve or components and parts with throttling function.
Described variable displacement pump is the load sensitive pump with stroking mechanism.
Described system control valve group is equipped with relief valve in the feedback pipe of described variable displacement pump.
Described system control valve group is made of a plurality of solenoid valve groups, and the quantity of described solenoid valve group is corresponding with the quantity of described work actuator.
Adopt said structure, the utlity model has following advantage:
1, the pump discharge flow adjustable restrictive valve of before leading to the general solenoid valve group, need flowing through first, adjustable restrictive valve can the Moderator Variable pump to institute of operation mechanism supply flow, can carry out according to the requirement of concrete final controlling element and load the setting of output flow.
2, the throttle valve on feedback loop is used for the control system stationarity, the filtration system pressure surge.
3, the relief valve on feedback loop be used for to be set up system works pressure, and anti-locking system is pressed too high damage system.
In sum; the utility model changes traditional by complexity such as variable displacement pump plus-pressure compensation multi-way valve; expensive system model; complexity and the user cost of system in the constant situation of original major function, have been greatly reduced; it can be set and the regulating system flow according to loading demand; can realize simultaneously system load Pressure testing and feedback; system works pressure setting and safety protection; system's output power coupling; a plurality of functions such as work actuating mechanism controls are in one; complex system and expensive valve group have been avoided using; simplified whole system; system energy loss is little; overall performances etc. significantly improve; compact overall structure; easily realize I﹠ M, cost of production is low.
Description of drawings
Fig. 1 is hydraulic schematic diagram of the present utility model.
Fig. 2 is variable displacement pump schematic diagram of the present utility model.
Fig. 3 is control valve group pictorial diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, describe a kind of embodiment of simple and easy load sensitive system in detail.
Shown in Figure 1 is a kind of enforcement illustration of simple and easy variable-speed load sensitive system of the present invention, and described simple and easy variable-speed load sensitive system is by variable displacement pump 1 and stroking mechanism 2 thereof, relief valve 3, throttle valve 4, work actuator 5, solenoid valve group 6, the compositions such as adjustable restrictive valve 7 and hydraulic oil container 8.As shown in Fig. 2,3, a kind of combination mounting type of described load sensitive pump and solenoid valve group and adjustable restrictive valve.
As shown in Figure 1, the oil outlet of variable displacement pump 1 links to each other with adjustable restrictive valve 7, and then by the solenoid valve group to work actuator 5 fuel feeding.
As shown in Figure 1, be equipped with a throttle valve 4 at feedback loop, be used for the control system stationarity, the filtration system pressure surge.
As shown in Figure 1, be equipped with relief valve 3 at feedback loop and be used for setting up system works pressure, prevent the too high damage of system pressure system.
Be illustrated in figure 2 as the schematic diagram of load sensitive pump and control mechanism thereof, load sensitive pump comprises load-sensitive valve 21, pressure cut off control valve 22, when pump discharge pressure during greater than load feedback pressure and spring force sum, load-sensitive valve 21 spools move right, and it is in left working position, high pressure oil is by load-sensitive valve 21 entering variable pump variable cylinder right-hand member Moderator Variable pumps, POF is reduced, output flow and load Auto-matching, thus save energy.When pump discharge pressure during less than load feedback pressure and spring force sum, load-sensitive valve 21 spools are in right working position, variable displacement pump variable cylinder right-hand member leads to fuel tank, promoting variable cylinder under the effect of high pressure oil moves to right, thereby increase pump swash plate angle, POF is subtracted greatly, to reach the demand of load flow.
As shown in Figure 3, regulate, distribute, control key components design and installation compound mode for load flow in the simple and easy variable-speed load sensitive system.
Shown in Fig. 1,3, when any solenoid valve moves in the execution work mechanism 5, the solenoid valve corresponding actions of control feedback oil circuit, with the stroking mechanism of system pressure Real-time Feedback to variable displacement pump, thereby the Moderator Variable pump is to the flow of system's output.
The above is the preferred embodiments of the present invention only, and does not limit the present invention in any way, and for a person skilled in the art, the present invention can have various changes and modification.Within the spirit and principles in the present invention all, any change of doing, be equal to replacement, modification, improvement etc., all should be included within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (7)
1. simple and easy load sensitive system, comprise variable displacement pump, system control valve group, feedback loop and work actuator, it is characterized in that: be provided with the first components and parts that carry out Flow-rate adjustment between the oil inlet end of the oil outlet end of described variable displacement pump and described system control valve group or on the system control valve group.
2. simple and easy load sensitive system according to claim 1 is characterized in that: described the first components and parts that carry out Flow-rate adjustment are throttle valve or components and parts with throttling function.
3. simple and easy load sensitive system according to claim 1 is characterized in that: the second components and parts with damping function are installed in the described feedback loop.
4. simple and easy load sensitive system according to claim 3 is characterized in that: described the second components and parts that carry out Flow-rate adjustment are throttle valve or components and parts with throttling function.
5. it is characterized in that according to claim 1 or 3 described simple and easy load sensitive systems: described variable displacement pump is the load sensitive pump with stroking mechanism.
6. simple and easy load sensitive system according to claim 5, it is characterized in that: described system control valve group is equipped with relief valve in the feedback pipe of described variable displacement pump.
7. simple and easy load sensitive system according to claim 5, it is characterized in that: described system control valve group is made of a plurality of solenoid valve groups, and the quantity of described solenoid valve group is corresponding with the quantity of described work actuator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220445145.9U CN202789861U (en) | 2012-09-03 | 2012-09-03 | Simple load sensory system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220445145.9U CN202789861U (en) | 2012-09-03 | 2012-09-03 | Simple load sensory system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202789861U true CN202789861U (en) | 2013-03-13 |
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ID=47817127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220445145.9U Expired - Lifetime CN202789861U (en) | 2012-09-03 | 2012-09-03 | Simple load sensory system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202789861U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405708A (en) * | 2014-09-18 | 2015-03-11 | 广西柳工机械股份有限公司 | Load-sensitive simulation valve and load-sensitive variable system of loading machine |
-
2012
- 2012-09-03 CN CN201220445145.9U patent/CN202789861U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405708A (en) * | 2014-09-18 | 2015-03-11 | 广西柳工机械股份有限公司 | Load-sensitive simulation valve and load-sensitive variable system of loading machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
|
| CX01 | Expiry of patent term |