Cartridge type load-sensitive reversing valve
A load-sensing, reversing valve technology, applied in fluid pressure actuators, servo motor components, mechanical equipment, etc., can solve the problems of complex internal flow channels, complex pipelines of the main engine, oil leakage, etc., and achieve reduced volume and weight , reduced complexity, and easy-to-use effects
Inactive Publication Date: 2018-09-18
佛山信卓派思机械科技有限公司
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Problems solved by technology
[0003] At present, the load-sensing multi-way directional valve used in the load-sensing system is generally in the form of three-position six-way, mostly in the form of castings, or a piece-type multi-way directional valve or an integral multi-way directional valve. The reversing valve has an eight-slot structure, and is equipped with a corresponding shuttle valve assembly. The internal flow path is very complicated, resulting in a large overall volume, heavy weight, and high cost; and with the complexity of the hydraulic oil circuit, the existing multi-way changer The directional valve is not suitable for integrated design. In order to meet the complex hydraulic oil circuit, it is necessary to connect the multi-way directional valve with other functional valve blocks through many hoses, which makes the pipeline of the main engine complex and easily causes oil leakage.
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[0022] see Figure 1-5 As shown, a plug-in load-sensing reversing valve includes a plug-in valve body 9, and the plug-in valve body 9 is provided with a valve hole 901 penetrating left and right, and a valve core 8 is slidably connected to the valve hole 901. ; The outer surface of the plug-in valve body 9 is sequentially provided with a first annular groove 902, a second annular groove 903, a third annular groove 904, and a fourth annular groove 905 from left to right. The first annular groove 902 The LS feedback oil port 906 communicating with the valve hole 901 is provided inside, the B oil port 92 communicating with the valve hole 901 and the first flow hole 9b are provided in the second annular groove 903, and the third annular groove 904 is provided with a The P oil port 93 communicated with the valve hole 901, the A oil port 91 communicated with the valve hole 901 and the second flow hole 9c are arranged in the fourth annular groove 905; , the screw sleeve 1 is provide...
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The invention discloses a cartridge type load-sensitive reversing valve. The cartridge type load-sensitive reversing valve comprises a cartridge valve body, wherein a left-right penetrating valve holeis formed in the cartridge valve body, and a valve core is slidably connected in the valve hole; a screw sleeve is arranged at the left end of the cartridge valve body, a left-right penetrating mounting hole is formed in the screw sleeve, and a transmission rod which is in threaded connection with the left end of the valve core is slidably connected in the mounting hole; the left end of the valvehole is provided with a screw plug which is in clearance connection with the transmission rod in a sleeving mode, and a reset spring sleeves the position, located in the mounting hole, of the outer side of the transmission rod; a fifth annular groove is formed in the outer side surface of the screw sleeve, a pilot-controlled oil opening X is formed in the fifth annular groove, and a pilot-controlled oil opening Y is formed in the right end of the valve hole; and a third flow hole, a fourth flow hole and an eleventh flow hole are formed in the valve core, and the right end of the third flow hole communicates with the pilot-controlled oil opening Y. The cartridge type load-sensitive reversing valve is simple and reasonable in structure, low in manufacturing cost, and capable of facilitatingintegral design and simplifying the hydraulic oil path.
Description
technical field [0001] The invention relates to the technical field of cartridge valves, in particular to a cartridge-type load-sensing reversing valve. Background technique [0002] The multi-actuator load-sensing system is an energy-saving hydraulic system widely used in vehicles, construction machinery, agricultural machinery, mining machinery, forestry machinery, and petroleum machinery. , Executive agencies and other components. Since the system is only supplied by a single pump, it can simultaneously control multiple actuators with different load pressures through the load-sensitive multi-way reversing valve, and can ensure that the speed does not change with the load pressure, so the vehicle and The operation performance of construction machinery can avoid the phenomenon that the low load is too fast and the high load stops. [0003] At present, the load-sensing multi-way directional valve used in the load-sensing system is generally in the form of three-position si...
Claims
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IPC IPC(8): F15B13/02
CPCF15B13/025
Inventor刘艳荣
Owner佛山信卓派思机械科技有限公司