阅读说明：本技术 基于阀前差动原理的大流量低功耗高精度液压调速系统 (Big flow low power consumption high-precision hydraulic speed regulation system based on differential principle before valve ) 是由 马建群 姚妙震 李浪 陈亮 叶晓帅 邵琦 梁忠楠 于 2019-08-14 设计创作，主要内容包括：本发明公开了基于阀前差动原理的大流量低功耗高精度液压调速系统,系统将若干个比例阀并联组成一个液压阀组,阀组P口和油缸有杆腔均与油源直接连接。当流量需求变化幅度大时,油源和有杆腔共同出油用以满足系统大流量变化,从而有效地降低了系统功率。同时油源和油缸有杆腔的供油通过阀组精确调节流量,以保证能稳定控制油缸运动。本发明公开此系统的结构示例,通过有杆腔与油源直接相连、供油通过阀组精确调节流量变化的方法,保证此液压系统可以在大范围流量变化的情况下降低系统功耗、稳定控制油缸动作,避免了由于流量需求过大导致的系统功率大、控制精度低等问题。为行业内在流量需求过大的液压系统固定配置下,解决速度、功耗和和精确调节(稳定)的矛盾问题提供了新思路及方案,促进了行业技术发展。(The invention discloses the big flow low power consumption high-precision hydraulic speed regulation system based on differential principle before valve, several proportioning valves are composed in parallel a hydraulic valve bank by system, and P mouthfuls of valve group and cylinder rod chamber are directly connected to oil sources.When flow demand amplitude of variation is big, oil sources and rod chamber are common fuel-displaced to meet the variation of system big flow, to significantly reduce system power.The fuel feeding of oil sources and cylinder rod chamber is by valve group accurate flow adjustment simultaneously, to guarantee stability contorting cylinder movement.The present invention discloses the topology example of this system, pass through rod chamber and oil sources is connected directly, fuel feeding is changed by valve group accurate flow adjustment method, guarantee that this hydraulic system can reduce system power dissipation, stability contorting cylinder action in the case where wide range of traffic changes, avoids due to the problems such as excessive caused system power of flow demand is big, control precision is low.For under the excessive hydraulic system fixed configurations of industry internal liquidity demand, solve speed, power consumption and and the accurate contradictory problems for adjusting (stabilizations) provide new approaches and scheme, promote industry technology and develop.)

1. the big flow low power consumption high-precision hydraulic speed regulation system based on differential principle before valve, which is characterized in that the system is by liquid Pressure oil source, hydraulic valve bank, hydraulic cylinder composition, several proportioning valves compose in parallel a hydraulic valve bank, the P mouth and oil cylinder of valve group Rod chamber be connected with oil sources；When flow demand amplitude of variation is big, oil sources and rod chamber are common fuel-displaced to meet system Big flow variation, to significantly reduce system power；The fuel feeding of oil sources and cylinder rod chamber is accurately adjusted by valve group simultaneously Amount of restriction, to guarantee stability contorting cylinder movement.

2. the big flow low power consumption high-precision hydraulic speed regulation system as described in claim 1 based on differential principle before valve, special Sign is, several different types proportioning valves are composed in parallel a hydraulic system and are interlocked valve group, the P mouth of valve group and oil cylinder Rod chamber is connected directly with oil sources.

3. the big flow low power consumption high-precision hydraulic speed regulation system as described in claim 1 based on differential principle before valve, special Sign is, when oil cylinder does high-speed motion, oil sources and rod chamber are jointly fuel-displaced, to provide wide range of traffic when high-speed motion Variation, enters rodless cavity by hydraulic valve bank, significantly reduces system power.

4. the big flow low power consumption high-precision hydraulic speed regulation system as described in claim 1 based on differential principle before valve, special Sign is, when oil cylinder does high-speed motion, the fuel feeding of oil sources and cylinder rod chamber is steady to guarantee by valve group accurate flow adjustment Surely cylinder movement is controlled.

5. the big flow low power consumption high-precision hydraulic speed regulation system as described in claim 1 based on differential principle before valve, special Sign is that the circuit is generally applicable to the hydraulic speed regulation system of big flow.

Technical field

The invention belongs to universal machine hydraulic system technical field, the big flow low-power consumption based on differential principle before valve is high-precision Spend hydraulic speed regulation system.

Background technique

For large-flow hydraulic system fixed configurations, and meet under high flow rate motion conditions, often power needed for system is big, In certain power limited occasions, it is difficult to meet rate request, i.e. the operation of realization Full System Capability, and can not accurate flow adjustment change Change, frequently can lead to system performance reduction.Therefore, be badly in need of designing it is a kind of meet the big hydraulic system of flow demand, solve system Speed, power consumption and the accurate contradictory problems for adjusting (stabilization).

Summary of the invention

It is hydraulic to provide the big flow low power consumption high-precision based on differential principle before valve by the present invention to solve above-mentioned technical problem Speed-regulating system.

The technical solution adopted by the present invention is that: the big flow low power consumption high-precision Hydraulic Adjustable Speed system based on differential principle before valve System, which is characterized in that big flow proportioning valve 1, big flow proportioning valve 2 are all made of O-shaped Median Function, and proportioning valve 1, proportioning valve 2 are simultaneously Be associated in hydraulic valve bank 3, the A mouth of valve group 3 is connect with oil cylinder rodless cavity 401, the P mouth and cylinder rod chamber 402 of valve group 3 with oil Source 7 connects, and the T mouth of proportioning valve 1,2 is connect with oil sources 7.Signal 5 controls proportioning valve 1, and signal 6 controls proportioning valve 2.

It is using controller, proportioning valve 1 is consistent with the debugging of the dynamic property of proportioning valve 2.

When oil cylinder 4 does high-speed motion, passed through by the big flow that oil sources 7 and 402 oil pump capacity of cylinder rod chamber provide jointly Hydraulic valve bank enters oil cylinder rodless cavity 401, significantly reduces system power.

When oil cylinder 4 does high-speed motion, the fuel feeding of oil sources and cylinder rod chamber is by valve group accurate flow adjustment, to guarantee Stability contorting oil cylinder 4 moves.

Detailed description of the invention

Fig. 1 is hydraulic schematic diagram of the invention；

Fig. 2 is the working state schematic representation of high-speed large-flow movement of the invention；

In Fig. 1,1 be first big flow proportioning valve 1,2 is second big flow proportioning valve, and 3 be hydraulic valve bank, and 4 be oil Cylinder, 401 be rodless cavity, and 402 be rod chamber, and 403 be piston rod, and 5 be the control signaling interface of proportioning valve 1, and 6 be proportioning valve 2 Signaling interface is controlled, 7 be hydraulic oil source.

Specific embodiment

It is a specific embodiment of the invention below, in conjunction with attached drawing 1,2, the present invention will be further described.

Referring to FIG. 1, the big flow low power consumption high-precision hydraulic speed regulation system based on differential principle before valve, specifically includes that Proportioning valve 1, proportioning valve 2, proportioning valve 1,2 compose in parallel a hydraulic valve bank 3, and the A mouth and oil cylinder rodless cavity 401 of valve group 3 connect It connects, the P mouth and cylinder rod chamber 402 of valve group 3 are connect with oil sources 7, and the P mouth of valve group 3 is connect with 7 high pressure oil port of oil sources, valve group 3 T mouth, Y mouthfuls and oil cylinder rodless cavity 402 connect with the fuel tank of oil sources 7, the X mouth of proportioning valve 1 is connect with control signal 5, proportioning valve 2 X mouth with control signal 6 connect.

As shown in Fig. 2, when oil cylinder 4 needs to carry out high-speed motion, it is common by oil sources 7 and 402 oil pump capacity of cylinder rod chamber The big flow of offer enters oil cylinder rodless cavity 401 by hydraulic valve bank, significantly reduces system power.

As shown in Fig. 2, controller receives big flow signal when oil cylinder 4 needs to carry out high-speed motion, ratio is cooked up Valve group closes optimal case, and the signal 5 of controller controls proportioning valve 1 with signal 6 respectively and connects oil circuit, oil sources and oil with proportioning valve 2 The fuel feeding of cylinder rod chamber is by 3 accurate flow adjustment of hydraulic valve bank, so that oil cylinder 8 acts smooth, position control accuracy height, response Fastly.

The foregoing is merely preferable case study on implementation of the invention, are not intended to limit the invention, all in original of the invention It then with any modification for being made within spirit, equally improves and replacement, should all be included in the protection scope of the present invention.