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Stroke proportional transmission hydraulic circuit

A hydraulic circuit and stroke technology, applied in the direction of fluid pressure actuation device, servo motor, mechanical equipment, etc., can solve the problems of large internal impact force, difficult process, huge structure, etc., to reduce internal impact and reduce operating speed. Effect

Inactive Publication Date: 2011-12-28
CHINA GEZHOUBA GROUP CO LTD
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AI Technical Summary

Problems solved by technology

[0002] When the power output components and stroke position control components of hydraulic crushing equipment and hydraulic rock drilling equipment need to be arranged separately, the following problems will arise in the method of mechanical connection: the coaxiality is extremely high, the process is difficult; the structure is huge; the internal impact force is large

Method used

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Embodiment Construction

[0009] In the present invention:

[0010] Power Piston 1: It is a power output mechanism that reciprocates when the front and rear chambers are alternately supplied with oil to convert hydraulic energy into kinetic energy for output. The extension rod at the non-power output end of the power piston 1 serves as the piston a of the piston group 2 for the stroke ratio control.

[0011] Stroke proportional control piston group 2: Stroke proportional control piston group 2 consists of the non-power output end extension rod a of the power piston 1, the large piston b coaxially connected with the stroke signal feedback control valve 3, the cavity c and the oil seal group d composition. The cavity c is filled with hydraulic oil. The incompressibility of hydraulic oil is used to make the changes in the stroke positions of piston a and piston b equal to the reciprocal of their cross-sectional ratio. The position signal of the power piston 1 is transmitted to the stroke signal feedback con...

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Abstract

The invention discloses a stroke equal-ratio transmission hydraulic circuit, which can be applied to hydraulic crushing equipment, hydraulic rock drilling and other equipment. It is mainly composed of a power piston, a stroke proportional control piston group, a stroke signal feedback control valve, a reversing valve, and an oil filling valve. The rod, the large piston, the cavity and the oil seal group of the stroke equal ratio control piston group form a closed cavity, and the cavity is filled with hydraulic oil. The reciprocating motion of the power piston controls the piston group through the proportional stroke, and transmits the stroke position signal proportionally to the stroke signal feedback control valve; the reversing valve is controlled by the stroke signal feedback control valve to control the reciprocating motion of the power piston. The invention can make the power piston and the stroke signal feedback control valve unnecessary to be arranged on the same axis, and can effectively reduce the operating speed of the spool of the stroke signal feedback control valve and reduce the internal impact.

Description

Technical field [0001] The invention relates to a hydraulic circuit with a stroke ratio transmission, in particular to a stroke ratio transmission hydraulic circuit for hydraulic rock drilling machinery and hydraulic crushing equipment. Background technique [0002] When the power output components and stroke position control components of hydraulic crushing equipment and hydraulic rock drilling equipment need to be arranged separately, the following problems will arise when the method of mechanical connection is adopted: the coaxiality is extremely high, the process is difficult, the structure is huge, and the internal impact force is large. . Summary of the invention [0003] The purpose of the present invention is to provide a hydraulic crushing equipment and hydraulic rock drilling equipment when the power output components and stroke position control components need to be arranged separately, without considering the coaxiality, the process difficulty is low, the structure is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B11/02
Inventor 姚小林
Owner CHINA GEZHOUBA GROUP CO LTD
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