CN1256573C - Method for detecting diesel-engine water-pump flow and preventing from overloading, and apparatus thereof - Google Patents
Method for detecting diesel-engine water-pump flow and preventing from overloading, and apparatus thereof Download PDFInfo
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- CN1256573C CN1256573C CN 03114007 CN03114007A CN1256573C CN 1256573 C CN1256573 C CN 1256573C CN 03114007 CN03114007 CN 03114007 CN 03114007 A CN03114007 A CN 03114007A CN 1256573 C CN1256573 C CN 1256573C
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- diesel pump
- control computer
- diesel
- speed
- water pump
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Abstract
The present invention relates to a water pump flow detection and overload prevention technique, particularly to a method and a device for detecting the water pump flow of a diesel engine and preventing overload. The present invention has the method that two parameters of the rotary speed of a water pump of a diesel engine and the outlet lift of the water pump are detected by an instrument, and the two parameters are transmitted to a control computer. The real-time flow of the water pump of the diesel engine is calculated by the control computer according to the two parameters, and whether the water pump is overloaded or not is judged. The device for realizing the method is mainly composed of the control computer, a speed sensor and a pressure sensor. The speed sensor is installed on a main shaft of the diesel engine, and the pressure sensor is installed in the outlet position of the water pump of the diesel engine. The speed sensor and the pressure sensor are connected with the control computer by data connecting lines. The present invention has the advantages of high measurement precision, accurate early warning, wide application range, simple structure, small volume, convenient installation and low cost. The present invention can be widely applied to the measurement and the protection of the common water pump of a diesel engine with low price and other water supply systems.
Description
Technical field
The present invention relates to pump capacity and detect and prevent the overload technology, a kind of more specifically diesel pump flow detection and the method and the device thereof that prevent to overload.
Technical background
Be the needs of modern times water supply, production, irrigation and fire-fighting, a kind of novel be that the water pump of driving force is by the how tame manufacturer production in home and abroad by diesel engine.But produce diesel pump has a difficult problem perplexing numerous designers and user always: how to prevent that diesel pump from damaging because of overload.
Diesel pump is with different by electric motor driven water pump; electric water pump can be loaded onto over-current protecting element in design easily on its current supply circuit; can cause the protecting component action when system overload, the current supply circuit of electric water pump is cut off in control, makes system obtain protection.
Prevent in the prior art that the damage of diesel pump overload from having the method for following two kinds of routines:
1. as shown in Figure 1, add the clutch coupling 3 of a permanent moment of torsion between power source 1 and diesel pump 2, when the excessive and overload of the flow of water pump 2, clutch coupling 3 skids, and has prevented overload.Its shortcoming is that volume is big; Control is inconvenient; Complex structure is installed and maintenance difficult; There was a mechanical failure easily; Cost an arm and a leg, and price increases with the increasing of output power.
2. as shown in Figure 2, install a flowmeter 4 additional, when recording the flow overload of diesel pump 2, send indication and make diesel pump 2 slow down, report to the police or shut down, prevent to damage diesel pump in water pump 2 exits.Its shortcoming is that inconvenience is installed very, for the real-time traffic of accurate measurement need leave 2 meters straight tube before and after flowmeter; Cost an arm and a leg, and price increases with the increase of exporting bore.
Above-mentioned two kinds of methods all exist cost too high, and shortcomings such as difficulty are installed, and are unfavorable for promoting the use of of fire fighting equipment that modern water supply, production, irrigation and non-electricity drive.Particularly under the situation that needs fast, installs in a large number at fire fighting equipment, increase the cost and the difficulty of installing greatly, hindered promoting the use of of fire fighting equipment.
Summary of the invention
The objective of the invention is to overcome shortcoming of the prior art, a kind of measuring accuracy height, accurately early warning, applied widely, simple in structure, volume is little, easy for installation, diesel pump flow detection that cost is low and preventing overloads method are provided.
The present invention also aims to provide the device of realizing said method.
Diesel pump flow detection of the present invention and prevent that the method that overloads from being to be measured the rotating speed of diesel pump by speed pickup, measure the lift of exit of pump by pressure transducer, these two parameters are sent to control computer, control computer goes out the real-time traffic of diesel pump according to these two calculation of parameter, and judges whether it overloads.
Adopted computing machine to do and detected and system's control; can make things convenient for and realize fast the measurement and the calculating of flow, lift, rotating speed and the power of diesel pump; to measure and calculate the overload parameter comparison of the result of gained by computing machine and former setting; can judge fast whether diesel pump transships under the real-time working situation, if overload can be by police of control computer automatic forecasting or stoppage protection.Adopt method of the present invention to control diesel pump, can be simple, quick, monitor the working condition of diesel pump accurately, its real-time running parameter of accurate response, so that in time control diesel pump, the present invention has alleviated staff's workload greatly.
The rotating speed and the lift that adopt method of the present invention to measure can be divided into following two kinds of situations:
1. when measured real-time rotating speed is the rated speed of diesel pump, calculate the real-time traffic of diesel pump by being stored in the flow typical curve corresponding in the control computer with rated speed and lift.Described typical curve is a diesel pump when testing on testing table before dispatching from the factory, and utilizes the instrument such as flow, pressure, moment of torsion and rotating speed of testing table precision, demarcates the flow of this water pump when rated speed, the head curve of power correspondence.Described typical curve is the standard test for every diesel pump, all there is more or less deviation in different diesel pumps because of the error of technology, before employing is dispatched from the factory to every method of carrying out standard test make the curve of surveying be consistent with the concrete condition of every water pump, have more accuracy.
2. when measured real-time rotating speed is not the rated speed of diesel pump, control computer is according to the funtcional relationship between rotating speed and flow, lift, the power: Q
2=(n
2/ n
1) Q
1, H
2=(n
2/ n
1)
2H
1, P
2=(n
2/ n
1)
3P
1Calculate the real-time flow data of diesel pump.Because diesel pump is various Effect of Environmental in the process of using, as fuel oil, exhaust, height above sea level, wear and tear in machines etc., its working condition might be inconsistent with the working condition on testing table, having caused measured real-time rotating speed is not the rated speed that diesel pump is demarcated, the method that test the present invention adopts theoretical formula to convert, can carry out formula fast with control computer and convert, the real-time traffic of diesel pump in time is provided.
Two kinds of computing method that the present invention adopts are replenished mutually; at the different the most accurate computing method of this selection of working condition of diesel pump; make that the result of gained is more accurate; and when the real-time traffic of diesel pump is crossed current-carrying capacity above it; control computer can be made the reaction of overload-alarm and warning stoppage protection, and carries out early warning exactly.Guarantee the safe handling of diesel pump, improved staff's work efficiency, also alleviated the intensity of work simultaneously.
The present invention realizes that the device of said method mainly is made up of control computer, speed pickup, pressure transducer, speed pickup is installed on the diesel engine main shaft, pressure transducer is installed on the diesel pump exit, and speed pickup is connected with control computer by data bus connection with pressure transducer.This device precision height, powerful, volume is little, at the bottom of simple in structure, the cost, easy for installation, and go for the diesel pump of any bore, can be widely used in other diesel pumps of common low price and the metering and the protection of water system.
Inventing described control computer can be one-chip computer; adopt single chip computer architecture computer program can be solidified in one-chip computer; saved the space greatly; reduced cost; and the single chip computer architecture that adopts one-time write or particular technology to write; more help protecting the safety of its program and data, also do not influence the accuracy of its data under rugged environment even diesel pump is worked.
This device can just can accurately record real-time speed and two parameters of lift of diesel pump by cheap electromagnetic speed sensor and pressure transducer.Embody the characteristics of this method low-cost and high-precision, made this device to use widely, more helped the popularization of the fire fighting equipment of non-electricity driving.
This device can be provided with the parameter display instrument on described control computer.Be used to show the real-time working situation of diesel pump, as the real-time traffic of water pump, real-time rotating speed or realtime power etc.Make its control have more hommization, also be convenient to the staff operating position of water pump is carried out record.
The present invention compared with prior art has following advantage: 1, efficient of the present invention is high and have a very high accuracy; 2, be that every water pump is measured the typical curve under its rated speed, meet the actual conditions of different water pumps; The computing method that 3 usefulness computing machines carry out two kinds of complementations meet the concrete operating position of water pump; 4, the bulking block of the present invention's use is few, simple in structure, and volume is little; 5, described measurement device precision height, data stability is good, and is safe; 6, described device goes for the pump group of any bore; 7, described device is easy for installation, and is low to the installation environment requirement, uses more extensive; 8, described installation cost is low, helps promoting the use of; 9, described device also is applicable to the water pump assembly of other types simultaneously.
Description of drawings
Fig. 1 is the structural representation that flowmeter diesel pump group is installed in the prior art;
Fig. 2 is the structural representation that clutch coupling diesel pump group is installed in the prior art;
Fig. 3 is the structural representation of device of the present invention;
Fig. 4 is the performance standard curve map example of the described device of Fig. 3.
Embodiment
As shown in Figure 3, the present invention is used for the diesel pump flow detection and prevents that the device that overloads from being made of control computer 8, speed pickup 6, pressure transducer 7, speed pickup 6 is installed on the main shaft of diesel engine 1, pressure transducer 7 is installed on diesel pump 2 exits, and speed pickup 6 is connected with control computer 8 by data bus connection 9 with pressure transducer 7.
When the invariablenes turning speed of device, its lift/flow/shaft power just forms curve as shown in Figure 4, this curve map parameter: rotation speed n=1450 rev/min, power p=78kw, lift H=70 rice, flow Q=70 liter/second, rotation speed n 1=1450 rev/min, rotation speed n 2=1400 rev/min; According to following mathematical relation: Q
2=(n
2/ n
1) Q
1, H
2=(n
2/ n
1)
2H
1, P
2=(n
2/ n
1)
3P
1Calculate the real-time flow data of device, when device because certain reason continuous modified flow rate parameter still when changing, thereby realize the metering of rotating speed, lift, flow easily and set transshipping early warning and warning stoppage protection.
Claims (8)
1. diesel pump flow detection and the method that prevents to overload, it is characterized in that measuring the rotating speed of diesel pump by speed pickup, measure the lift of exit of pump by pressure transducer, these two parameters are sent to control computer, control computer goes out the real-time traffic of diesel pump according to these two calculation of parameter, and judges whether it overloads.
2. diesel pump flow detection according to claim 1 and the method that prevents to overload, it is characterized in that when measured real-time rotating speed is the rated speed of diesel pump, calculate the real-time traffic of diesel pump by being stored in the flow typical curve corresponding in the control computer with rated speed and lift.
3. diesel pump flow detection according to claim 1 and the method that prevents to overload, it is characterized in that when measured real-time rotating speed is not the rated speed of diesel pump control computer is according to the funtcional relationship between rotating speed and flow, lift, the power: Q
2=(n
2/ n
1) Q
1, H
2=(n
2/ n
1)
2H
1, P
2=(n
2/ n
1)
3P
1Calculate the real-time flow data of diesel pump, wherein Q refers to flow, and H refers to flow process, and n refers to rotating speed, and P refers to power.
4. a kind of diesel pump flow detection according to claim 1 and the method that prevents to overload is characterized in that control computer is made the reaction of overload-alarm and warning stoppage protection when the real-time traffic of diesel pump is crossed current-carrying capacity above it.
5. diesel pump flow detection and the device that prevents to overload, it is characterized in that mainly forming by control computer, speed pickup, pressure transducer, speed pickup is installed on the diesel engine main shaft, pressure transducer is installed on the diesel pump exit, and speed pickup is connected with control computer by data bus connection with pressure transducer; Measure the rotating speed of diesel pump by speed pickup, measure the lift of exit of pump by pressure transducer, these two parameters are sent to control computer, and control computer goes out the real-time traffic of diesel pump according to these two calculation of parameter, and judges whether it overloads.
6. the device that diesel pump flow detection according to claim 5 and preventing overloads is characterized in that described control computer is an one-chip computer.
7. the device that diesel pump flow detection according to claim 5 and preventing overloads is characterized in that described speed pickup is an electromagnetic speed sensor.
8. according to claim 5 or 6 described diesel pump flow detection and prevent from the device that overloads to it is characterized in that described control computer is provided with the parameter display instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03114007 CN1256573C (en) | 2003-03-28 | 2003-03-28 | Method for detecting diesel-engine water-pump flow and preventing from overloading, and apparatus thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03114007 CN1256573C (en) | 2003-03-28 | 2003-03-28 | Method for detecting diesel-engine water-pump flow and preventing from overloading, and apparatus thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1438473A CN1438473A (en) | 2003-08-27 |
| CN1256573C true CN1256573C (en) | 2006-05-17 |
Family
ID=27674077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03114007 Expired - Lifetime CN1256573C (en) | 2003-03-28 | 2003-03-28 | Method for detecting diesel-engine water-pump flow and preventing from overloading, and apparatus thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN1256573C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010048313A1 (en) * | 2010-10-14 | 2012-04-19 | Continental Automotive Gmbh | Method and device for operating a tank ventilation system |
| CA2916094A1 (en) * | 2013-06-28 | 2014-12-31 | Provtagaren Ab | Method for verifying correct function of sampling equipment |
| CN104005866B (en) * | 2014-06-11 | 2016-05-04 | 广州三业科技有限公司 | A kind of diesel engine cam impeller pump prevents method and the control device of cavitation erosion |
| CN104389774A (en) * | 2014-12-16 | 2015-03-04 | 山东省水利科学研究院 | Automatic constant-pressure control device for diesel pump |
| CN105571844A (en) * | 2015-12-15 | 2016-05-11 | 北京建筑大学 | Method for measuring heating ventilation air conditioning system water pump or valve flow |
| CN105928569B (en) * | 2016-04-18 | 2017-09-01 | 广州极飞科技有限公司 | Unmanned plane sprays flow rate testing methods and device |
| CN109916027B (en) * | 2019-03-08 | 2021-04-27 | 广东美的制冷设备有限公司 | Method and device for controlling water pump of dehumidifier and computer readable storage medium |
| CN116221142A (en) * | 2023-01-18 | 2023-06-06 | 新界泵业(浙江)有限公司 | Simulation method, control system and water pump |
-
2003
- 2003-03-28 CN CN 03114007 patent/CN1256573C/en not_active Expired - Lifetime
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| CN1438473A (en) | 2003-08-27 |
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Granted publication date: 20060517 |