Method for detecting diesel-engine water-pump flow and preventing from overloading, and apparatus thereof

A technology of water pump flow and diesel engine, applied in the direction of detecting fluid flow by measuring differential pressure, volume/mass flow generated by mechanical effect, flow control, etc., can solve problems such as price increase, high cost, installation difficulty, etc. , Accurate response, accurate monitoring effect

Inactive Publication Date: 2003-08-27
GUANGZHOU SUNYEAR TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantage is that it is very inconvenient to install. In order to measure accurate real-time flow, it is necessary to leave a 2-meter straight pipe before and after the flowmeter; it is expensive, and the price increases with the increase of the output caliber
[0007] The above two methods all have the disadvantages of high cost and difficult installation, which are not conducive to the popularization and use of modern water supply, production, irrigation and non-electrically driven fire-fighting equipment.
Especially in the case that fire-fighting equipment needs to be installed quickly and in large quantities, the cost and difficulty of installation are greatly increased, which hinders the popularization and use of fire-fighting equipment

Method used

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  • Method for detecting diesel-engine water-pump flow and preventing from overloading, and apparatus thereof
  • Method for detecting diesel-engine water-pump flow and preventing from overloading, and apparatus thereof
  • Method for detecting diesel-engine water-pump flow and preventing from overloading, and apparatus thereof

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Embodiment Construction

[0025] Such as image 3 As shown, the device of the present invention for detecting the flow rate of a diesel water pump and preventing overload is composed of a control computer 8, a speed sensor 6, and a pressure sensor 7. The speed sensor 6 is installed on the main shaft of the diesel engine 1, and the pressure sensor 7 is installed at the outlet of the diesel engine water pump 2. At , the speed sensor 6 and the pressure sensor 7 are connected to the control computer 8 through the data link 9 .

[0026] When the speed of the device is constant, its head / flow / shaft power will be formed as follows: Figure 4 As shown in the curve, the curve parameters: speed n=1450 rpm, power p=78kw, head H=70 meters, flow Q=70 liters / second, speed n1=1450 revolutions / min, speed n2=1400 revolutions / min; according to the following mathematical relationship: Q 2 =(n 2 / n 1 ) Q 1 、H 2 =(n 2 / n 1 ) 2 h 1 ,P 2 =(n 2 / n 1 ) 3 P 1 Calculate the real-time flow value of the device, ...

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Abstract

The method and device for measuring pump flux of diesel engines and preventing overload. The rotating speed and the lift of the pump are transferred to the control computer. Based on said two parameters, with the real time flux of the pump being calculated, the control computer determines whether the pump is overloaded. The device comprises the speed sensor installed on principal axis of diesel engines, the pressure sensor installed on outlet of the pump and the control computer connected to said two sensors. The invention provides the features of high measuring accuracy, accurate early warning, simple structure and low cost. The invented device can be applicable to low price pumps of diesel engine or other water supply systems.

Description

technical field [0001] The invention relates to water pump flow detection and overload prevention technology, more specifically, a method and device for diesel engine water pump flow detection and overload prevention. technical background [0002] To meet the needs of modern water supply, production, irrigation and fire protection, a new type of water pump powered by a diesel engine has been produced by many domestic and foreign manufacturers. However, there is a difficult problem in the production of diesel engine water pumps that has been puzzling the majority of designers and users: how to prevent the diesel engine water pump from being damaged due to overload. [0003] Diesel engine water pumps are different from water pumps driven by electric motors. Electric water pumps can easily be equipped with over-current protection components on their power supply circuits in design. The system is protected. [0004] In the prior art, there are two conventional methods to preve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/34G05D7/00
Inventor 郑浩
Owner GUANGZHOU SUNYEAR TECH
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