Low-pulsation gear flowmeter of composite gear type

Abstract

The invention discloses a low-pulsation gear flowmeter of a composite gear type, which is formed by enabling 2 shafts to respectively support a composite gear comprising gears 6, 7 and 8 and a composite gear comprising gears 17, 16 and 15. Each composite gear can comprise 2-4 gears axially mounted and peripherally staggered. A composite gear comprising three gears is used for explanation. Liquid to be measured enters an oil feeding cavity of the flowmeter from an oil feeding hole of the flowmeter and pushes the mutually engaged gears to rotate so that oil liquid is driven to an oil discharge cavity of the gears and is discharged from an oil discharge hole of the flowmeter, and a flow signal of the liquid to be measured is converted into a rotating speed signal of the shaft 1; then, the rotating speed signal is converted into an electric signal by an angle coder mounted on the shaft 1 to confirm the dynamic flow of a system to be measured; the mutually engaged gears, the shaft 1 and a shaft 2 can be made of light wear-resistant materials and have small rotational inertia; the number of the gears is a multiple of an integer not equal to 3, and the flow can realize staggered superposition. The flowmeter has extremely little flow pulsation, obviously improves the flow quality, belongs to a volume-type flowmeter to avoid the influence of test environmental conditions, accurately measures the dynamic flow of the high pressure of a hydraulic system, has the advantages of wide measurinog range, high precision, good reliability, and the like and can be widely applied to the flow measurement of the high-pressure hydraulic system of industries, such as aerospace, military industry, chemical industry, coal mine, metallurgy, and the like.

Description

technical field [0001] A low-pulsation composite gear-type gear flowmeter is suitable for systems using mineral oil, emulsion or water as the working medium. It is a flowmeter that can reliably measure the flow rate of a high-pressure hydraulic system and belongs to the field of dynamic flow testing of fluid transmission. Background technique [0002] As for the flow measurement of high-pressure hydraulic system, there are no formed products in China at present, but in the laboratories of some research institutions and colleges, under laboratory conditions, the flow can be measured accurately through the method of measuring flow briefly, but if the experiment If conditions change, such as fluid viscosity, temperature, flow velocity, pulsation, pressure, flow state, etc., it is difficult to accurately measure the flow rate of the high-pressure hydraulic system. A flow meter is a meter whose performance is strongly dependent on the conditions of use. Flowmeters are one of the...

AI Technical Summary

Problems solved by technology

Flowmeters are one of the few instruments that are more difficult to use than to manufacture. In the laboratory it can achieve extremely high accuracy, but in the field, once the conditions change, it is all in vain.

Invention patent JP2306122 "Positive displacement flowmeter" and invention patent 200610049716.6 "High pressure bidirectional oval gear flowmeter" are both based on oval gears as the research object. There is no flow pulsation that the oval gear flowmeter itself may bring to the measured system. Considering that it is difficult to measure high-pressure dynamic flow

New utility patent ZL200620006026.8 "balanced multi-gear high-pressure dynamic flowmeter", due to its complex structure, many rotating parts, and large moment of inertia, it is difficult to truly measure the dynamic flow of the hydraulic system

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