Automatic differential pressure balance type valve position indicator

Abstract

The invention relates to an automatic differential pressure balance type valve position indicator, which is mounted on a hydraulic circuit of a valve driver and comprises a valve seat 21, a metering gear pair 22, a meter head seat 23 and a meter head 24. The automatic differential pressure balance type valve position indicator is characterized in that the metering gear pair 22 consists of a pair of metering gears 42, a first gear bushing 43, a second gear bushing 44 and a metering gear seat 41, wherein the first gear bushing 43 and the second gear bushing 44 are arranged at the axle centers of the metering gears; pressure relief through holes are formed in tooth roots of each metering gear 42 in an equidistantly-staggered manner; a pressure relief passage is formed after the first gear bushing 43 and one metering gear 42 are assembled, and after the second gear bushing 44 and the other metering gear 42 are assembled, not only is an oil draining passage formed, but also the mechanical transmission without transmission shafts, fixing shafts and bearings is realized; and one end, where gear oil chambers are located, of the metering gear seat 41 is designed into an outline of two-circle intersecting, so that the smoothness of operation of the pair of metering gears 42 in two intersecting circles is favored.

Description

technical field [0001] The invention relates to a hydraulic valve remote control system used for ships and marine equipment, and in particular discloses a differential pressure automatic balance valve position indicator, which is used to control the opening of the valve during the remote control of the valve. Devices for indication and status measurement. Background technique [0002] At present, only low-end products are available in domestic hydraulic valve position indicators. The measurement principle adopted by foreign advanced hydraulic valve position indicators is volumetric, and the measuring element is a pair of high-precision cylindrical gears with the same modulus and the same number of teeth. The gear transmission mode is the fixed bearing type at both ends of the shaft. Existing problems: 1. High machining accuracy requirements for measuring gears, gear seats, and transmission parts; 2. High requirements for shape and position tolerances such as coaxiality, fla...

AI Technical Summary

Problems solved by technology

Existing problems: 1. High machining accuracy requirements for measuring gears, gear seats, and transmission parts; 2. High requirements for shape and position tolerances such as coaxiality, flatness, and assembly of gear seats and upper and lower connecting blocks; 3. Due to the volume Restrictions have high requirements on the selection and quality of bearings; 4. High working pressure (generally 13.5MPa), resulting in high pressure difference between upstream and downstream, under the action of hydraulic pressure, the gear is pushed to the downstream side of the gear seat wall and the upper and lower joint surfaces , when the running force along the direction of the gear pitch circle is not enough to overcome the resistance between the gear and the wall of the gear seat and the resistance between the gear and the upper and lower joint surfaces, the gear is stuck and cannot run

In recent years, the market products and related reports are nothing more than optimizing materials, improving technology, improving precision, adjusting size and part structure, although it has achieved results, it has not fundamentally solved the above problems

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