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, ...

Examples

Embodiment Construction

[0013] The present invention will be described in detail below in conjunction with the above-mentioned drawings. The first embodiment: the accumulator 7 is connected to the B oil port of the cartridge valve 5 of this patent, and is introduced into the spring chamber A3 of the pressure control cartridge valve 5 through the pilot valve 6. The rodless chamber of the oil cylinder 8 is connected to the A port of the cartridge valve 5 and the B port of the reversing valve 10 , and the rod chamber of the oil cylinder 8 is connected to the A port of the cartridge valve 9 and the reversing valve 10 .

[0014] The reversing valve 10 introduces a pressure source to control the oil cylinder 8 to perform slow lifting and retracting actions, wherein the oil return of the rod chamber of the oil cylinder 8 is controlled by the cartridge valve 9; when the high-speed lifting action is required, the pilot valve 6 reversing , to discharge the control oil in the spring chamber A3, the cartridge val...

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, ...

Examples

Embodiment Construction

[0013] The present invention will be described in detail below in conjunction with the above-mentioned drawings. The first embodiment: the accumulator 7 is connected to the B oil port of the cartridge valve 5 of this patent, and is introduced into the spring chamber A3 of the pressure control cartridge valve 5 through the pilot valve 6. The rodless chamber of the oil cylinder 8 is connected to the A port of the cartridge valve 5 and the B port of the reversing valve 10 , and the rod chamber of the oil cylinder 8 is connected to the A port of the cartridge valve 9 and the reversing valve 10 .

[0014] The reversing valve 10 introduces a pressure source to control the oil cylinder 8 to perform slow lifting and retracting actions, wherein the oil return of the rod chamber of the oil cylinder 8 is controlled by the cartridge valve 9; when the high-speed lifting action is required, the pilot valve 6 reversing , to discharge the control oil in the spring chamber A3, the cartridge val...

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