A fast-response and labor-saving speed-regulating cartridge valve

Abstract

The invention belongs to the field of hydraulic application and particularly discloses a fast-response laborsaving-speed-regulation cartridge valve. The cartridge valve comprises a cartridge valve bushing 2 and a cartridge valve core 1 which is in axial fit with the internal hole of the cartridge valve bushing 2 so as to form an oil chamber A1 and an oil chamber A2. The cartridge valve is characterized by further comprising a speed regulation lever 3, wherein a cylindrical face P of the speed regulation lever 3 and the internal hole S of the cartridge valve core 1 are in axial fit and form a seal face so as to form a spring chamber A3 and a balancing chamber A4; compared with the traditional cartridge valve structures, the spring chamber A3 for controlling the make-and-break of the oil chamber A1 and the oil chamber A2 has smaller control volume, so that a switching motion has a higher response speed; in addition, when oil of B is controlled to flow to A through introducing pressure into the spring chamber A3 from an oil port B, a limiting end face of the speed regulation lever communicates with the zero-pressure oil port B and does not bear axial thrust, so that the speed regulation is very laborsaving. According to the fast-response laborsaving-speed-regulation cartridge valve, the structure is simple, the manufacturing is easy, critical performance can be improved by applying the cartridge valve to high-speed material jetting working conditions of a hydraulic system needing fast response such as a die casting machine, and thus the popularization and application are facilitated.

Description

technical field [0001] The invention belongs to the field of hydraulic control, and in particular relates to a fast-response and labor-saving speed-regulating cartridge valve. Background technique [0002] At present, cartridge valve technology is generally used for high-speed and large-flow hydraulic action conditions. However, some application fields have put forward higher requirements for the opening speed of cartridge valves. It is controlled by installing a valve, and its injection acceleration characteristic is one of the key parameters to measure the performance of the die-casting machine. The use of traditional cartridge valves restricts the key performance of the die-casting machine due to the limitation of its opening speed, and has high requirements for the injection performance. The die-casting machine can only use the expensive servo cartridge valve, and use its high response characteristics to meet the high-performance requirements of the die-casting machine, ...

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is to develop a speed-adjustable cartridge valve with fast opening characteristics to meet the fast response requirements of some high-speed and large-flow hydraulic operating conditions, and at the same time, it has a simple structure and easy and effortless speed regulation. And the characteristics of low cost, thereby lowering the threshold of use, becoming the preferred product that most users can afford and use well

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