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Anti-cavitation large-range liquid turbine flowmeter

A technology of liquid turbine and flowmeter, which is applied in the direction of liquid/fluid solid measurement, measurement flow/mass flow, measurement device, etc. It can solve problems such as rarely considering the rotation of the turbine, changes in measurement characteristics, cavitation, etc., to avoid Effects of cavitation around the turbine, low cost, and widened application range

Active Publication Date: 2019-03-15
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Specifically, two situations have a decisive influence on its sensor characteristics: Conventional turbine measuring mechanisms rarely take specific account of the turbine rotation in the case of cavitation
Measurements at high speeds may cause cavitation in the flow field around the measurement mechanism, resulting in changes in measurement characteristics or failure

Method used

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  • Anti-cavitation large-range liquid turbine flowmeter
  • Anti-cavitation large-range liquid turbine flowmeter

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Experimental program
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Embodiment Construction

[0021] The specific embodiment of the present invention is further described below in conjunction with accompanying drawing:

[0022] A cavitation-proof large-range liquid turbine flowmeter is characterized in that it includes a housing 1, an outer guide 2, a mounting bracket 3, a display instrument 4, a signal line 5, a turbine speed measuring device 6, a rear guide 7, Turbine hub 8, turbine blades 9, front deflector 10, front support rod 11, lower support rod 12, rear support rod 13 and upper support rod 14, the installation bracket 3 is fixedly installed on the top surface of the housing 1 , the display instrument 4 is installed on the mounting bracket 3, the outer guide 2 is installed in the center hole of the housing 1, the rear end of the front support rod 11 is installed on the outer guide 2 and the front The front end of the support rod 11 is installed in the front mounting hole of the housing 1, the front end of the rear support rod 13 is installed on the outer flow g...

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Abstract

The invention discloses an anti-cavitation large-range liquid turbine flowmeter. The liquid turbine flowmeter is characterized in that a mounting bracket is mounted on the top face of a casing, a display instrument is mounted on the mounting bracket, outer deflectors are mounted in a central hole of the casing, a front deflector is mounted in central holes of the outer deflectors, the front and rear ends of a turbine hub are mounted in a mounting groove of the front deflector through support rods, and the two ends of a turbine blade are mounted on the turbine hub through bearings; a turbine speed measuring device is mounted on a rear deflector, the upper end of the lower support rod is mounted at the bottom of the rear deflector, one end of a signal line is connected with the turbine speedmeasuring device, and the other end of the signal line is connected with the display instrument through a central hole of the upper support rod. The liquid turbine flowmeter is simple in structure, low in cost, fast in response and high in reliability, it is ensured that the turbine flowmeter is driven by means of liquid flowing in a range smaller than a critical cavitation number, and the relative movement speed of a fluid is accurately obtained by measuring the rotational frequency of a turbine.

Description

technical field [0001] The invention belongs to the technical field of flow measurement, in particular to a cavitation-proof and large-range liquid turbine flowmeter. Background technique [0002] The liquid turbine flowmeter is installed in the pipeline. When the liquid flows through the device, parameters such as the flow rate and flow velocity of the moving body relative to the water can be obtained. Sensors that make measurements with turbines typically reduce their measurement output to input to a linear relationship. However, since the structure of the device is different from the traditional turbine flowmeter, the structure determines its sensor characteristics which are different from the traditional turbine measuring mechanism. In particular, two situations have a decisive influence on its sensor characteristics: Conventional turbine measuring mechanisms rarely take specific account of the turbine rotation in the event of cavitation. Measurements at high speeds ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/115
CPCG01F1/115
Inventor 陈勇
Owner NANJING INST OF TECH
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