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Volume type high order elliptic gear flowmeter

A technology of oval gear and flowmeter, which is applied in the direction of measuring flow/mass flow, liquid/fluid solid measurement, measuring devices, etc. It can solve the problems of less sealing, large pulsation, and increased noise

Inactive Publication Date: 2009-04-22
胡平
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the volumetric flowmeter of the oval gear rotor also has three shortcomings: one is that the pulsation is large, and the noise becomes louder when the flow rate is large; the second is that there are only two seals on the circumference; It is only a secondary signal can be collected after one rotation

Method used

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  • Volume type high order elliptic gear flowmeter
  • Volume type high order elliptic gear flowmeter
  • Volume type high order elliptic gear flowmeter

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Embodiment Construction

[0012] specific implementation plan

[0013] Such as figure 2 As shown, the high-order oval gear rotor (7) is installed on the shaft (10), the magnetic steel (9) is embedded on the high-order oval gear rotor (7); the high-order oval gear rotor (2) is installed on the shaft (4) Upper: The upper cover plate (6) forms a closed metering space (8) with the high-order oval gear rotor (7) and the housing (5).

[0014] exist image 3 At the moment shown, the fluid pressure at the inlet (3) is higher than the pressure at the outlet (1), because R11=R12, which means that the torque acting on the high-order oval gear rotor (7) is equal; while R22>R21, the acting The torque T on the high-order elliptical gear rotor (2) is=P*(R22-R21), and P is the pressure of the inlet fluid; at this time, the high-order elliptical gear rotor (2) is the driving wheel, and it rotates clockwise And push the high-order oval gear rotor (7) to rotate counterclockwise, and then discharge the fluid in the me...

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Abstract

The invention discloses a volumetric flowmeter with a rotor which is a high-order elliptic gear. The flowmeter consists of three parts which are a shell, two high-order elliptic gear rotors with the same size and a signal acquisition part. A function expression of a pitch curve of the high-order elliptic gear is as follows: r(phi)=A(1-k)) / (1-k*cosn phi), wherein, n is a natural number greater than 2. The flowmeter which takes the high-order elliptic gear as the rotor is characterized by small pulsation, low noise, enhanced sealing performance, increased signal acquisition amount and improved overall performance.

Description

technical field [0001] The invention belongs to the technical field of flow testing, and in particular relates to a volumetric high-order oval gear flowmeter. Background technique [0002] Traditionally, the rotors of gear-type positive displacement flowmeters have used circular or oval gears. Compared with circular gear rotors, elliptical gear rotors are widely used because of the characteristics of long and short axes, easy to form torque, can rotate with a small pressure difference, and have small pressure loss and sensitivity. However, the volumetric flowmeter of the oval gear rotor also has three shortcomings: one is that the pulsation is large, and the noise becomes louder when the flow rate is large; the second is that there are only two seals on the circumference; That is, only the secondary signal can be collected after one rotation. The 200410069464.4 patent disclosed in China in 2005 increases the sealing performance by filling between the tooth grooves on the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F3/10
Inventor 胡平杨决宽谭永贵
Owner 胡平
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