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Vehicle-mounted embedded gas flowmeter

A gas flow meter, embedded technology, applied in indirect mass flow meter, liquid/fluid solid measurement, volume measurement, etc., can solve the problems of gas flow measurement, and achieve the effect of simple installation, reduced test cost, and compact structure

Pending Publication Date: 2022-01-04
CHINA NORTH VEHICLE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is: Aiming at the difficulty that traditional gas flow measuring devices are difficult to accurately measure the gas flow in the narrow space inside the power plant, how to design a vehicle-mounted embedded gas flow meter requires that the flow meter has a highly integrated Features, it can be arranged in the air pipeline in the narrow space in the car to realize the dynamic measurement of the air flow and the monitoring of the flow state. Improved air flow measurement accuracy

Method used

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Embodiment 1

[0048] This embodiment The present invention provides a vehicle-mounted dynamic gas flow testing device. The design of this device mainly starts from the perspective of high dynamic measurement accuracy, small resistance, high integration and good reliability of the equipment, and realizes dynamic flow measurement of air in a limited space, and has strong anti-pollution ability.

[0049] In terms of high integration of equipment:

[0050] Existing conventional flowmeters mainly include mass flowmeters, positive displacement flowmeters, velocity flowmeters, differential pressure flowmeters, target flowmeters, etc. The main application scenarios of such flowmeters are test benches or industrial fixed equipment. There are strong requirements for space and test conditions, and the pipelines of the power compartment air intake system of special vehicles are mostly shaped and complicated, and there are inherent difficulties in flow measurement. Therefore, this project designs an em...

Embodiment 2

[0059] A vehicle-mounted dynamic gas flow collection device provided in this embodiment includes: an inlet well-shaped rectifying grid 1, a flow test device housing 2, a flow test core 3, a high-pressure chamber pressure point 4, a low-pressure chamber pressure point 5, Temperature and pressure sampling head 6, outlet concentric rectification grille 7, high pressure side pressure hole 8, low pressure side pressure hole 9, flow test core 3 is divided into independent high pressure chamber 10 and low pressure chamber 11.

[0060] After the fluid enters the flow collection device, it is firstly rectified by the imported well-shaped grid 1 to form a stable flow test area. The air passing through the rectification grid flows to the diamond-shaped plug-in flow test core 3, forming an upstream high pressure before and after the core. area and the low-pressure area on the side wall surface, thereby forming a pressure gradient of the fluid. The pressure tapping holes 8 and 9 on the core...

Embodiment 3

[0063] This embodiment is the first domestic air mass flow measurement device designed and developed for the dynamic gas flow test of special vehicles. Concentric circular rectification grid, diamond-shaped plug-in core, high-pressure chamber, low-pressure chamber, pressure-taking holes on the high-pressure side, pressure-taking holes on the low-pressure side, temperature and pressure sampling heads.

[0064] Among them, the embedded flow measurement device adopts an embedded diamond-shaped multi-curved core structure to realize air flow measurement under different working conditions of complex pipelines. Piping air flow test feasibility.

[0065] Among them, the front and rear rectification grids matched with the diamond-shaped core can effectively form a stable flow rate measurement area according to the core test requirements, realize effective rectification and high-precision pressure value collection in a large disturbance flow field, and improve test accuracy.

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Abstract

The invention belongs to the technical field of special vehicle testing, and particularly relates to a vehicle-mounted embedded gas flowmeter. The flowmeter comprises a #-shaped rectification grating, a cylindrical shell, a flow testing core body, a high-pressure cavity pressure measuring point, a low-pressure cavity pressure measuring point, a temperature and pressure sampling head, a concentric circle rectification grating, a high-pressure cavity pressure measuring hole and a low-pressure cavity pressure measuring hole. The interior of the flow testing core body is divided into a high-pressure cavity and a low-pressure cavity which are independent. According to the vehicle-mounted embedded gas flowmeter, from the aspects of high dynamic measurement precision, small resistance, high integration level and good reliability of equipment, dynamic flow measurement of air in a limited space is achieved, and the vehicle-mounted embedded gas flowmeter has high anti-pollution capacity.

Description

technical field [0001] The invention belongs to the technical field of special vehicle testing, and in particular relates to a vehicle-mounted embedded gas flowmeter. Background technique [0002] The new type of special vehicle integrated power unit is developing in the direction of informatization, modularization, and intelligence, and the informatization level of the power transmission device is constantly improving. Therefore, the informatization level of the dynamic parameter acquisition device of the on-board power transmission device has become one of the key indicators to measure the informatization degree of the power transmission device. [0003] Factors such as harsh working environment, high vibration, narrow interior space, irregular air intake pipeline, and complex electromagnetic compatibility environment of the power cabin seriously restrict the effective measurement of the dynamic flow rate of the air intake system of special vehicles, resulting in the failu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/86G01F15/14
CPCG01F1/86G01F15/14
Inventor 孙阳李欣马泽东隗立国张宝芝王阳曾志远
Owner CHINA NORTH VEHICLE RES INST