CN101650262B - Circulating water pressure control device of hydraulic dynamometer used for test bed - Google Patents
Circulating water pressure control device of hydraulic dynamometer used for test bed Download PDFInfo
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- CN101650262B CN101650262B CN2009101802140A CN200910180214A CN101650262B CN 101650262 B CN101650262 B CN 101650262B CN 2009101802140 A CN2009101802140 A CN 2009101802140A CN 200910180214 A CN200910180214 A CN 200910180214A CN 101650262 B CN101650262 B CN 101650262B
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Abstract
The invention discloses a circulating water pressure control device of a hydraulic dynamometer used for a test bed, comprising a pipeline, a frequency converter, a submerged pump motor, a submerged pump, a safety relief valve, a filter, a pressure stabilizing pot, a pressure transmitter, a circulating water inlet switch, a dynamometer and a circulating water drain switch which are connected on the pipeline in sequence, as well as a drain valve arranged on a dynamometer body, wherein the frequency converter is used for comparing the pressure value detected by the pressure transmitter with the set standard value and adjusting the rotation speed of the submerged pump by the submerged pump motor according to the comparison result to change the output water flow; and the drain valve is used for correspondingly increasing or reducing the opening degree according to the power change of a tested engine.
Description
Technical field
The present invention relates to detection range, in particular to a kind of hydraulic dynamometer circulating water pressure control device that is used for test bay.
Background technology
Certain model engine testsand is the high speed hydraulic dynamometer, and it is 0.35MPa ± 0.018MPa that hydraulic dynamometer requires the recirculated water intake pressure, and pressure of supply water fluctuates less than 0.007MPa.Thereby existing scheme is to adopt electric control valve to reach the controlled pressure size by the flow in the by-pass pipe shunt conduit.
In realizing process of the present invention, the inventor finds in the prior art because the electric control valve control accuracy is lower, pressure surge has exceeded the requirement of dynamometer, influences the measuring accuracy of engine capacity, moment of torsion and rotating speed, and then causes hydraulic dynamometer recirculated water pressure of supply water less stable.
Summary of the invention
The present invention aims to provide a kind of hydraulic dynamometer circulating water pressure control device that is used for test bay, can solve in the prior art because the electric control valve control accuracy is lower, pressure surge has exceeded the requirement of dynamometer, influence the measuring accuracy of engine capacity, moment of torsion and rotating speed, and then cause hydraulic dynamometer recirculated water pressure of supply water less stable problem.
In an embodiment of the present invention, a kind of hydraulic dynamometer circulating water pressure control device that is used for test bay is provided, comprise: the water discharging valve on pipeline and thereon frequency converter, submerged pump motor, submerged pump, safety relief valve, filtrator, buffer tank, pressure unit, recirculated water water inlet switch, dynamometer, recirculated water drainage switch and the dynamometer body of being linked in sequence, wherein
Frequency converter is used for the force value of pressure unit detection and the standard value of setting are compared, and the rotating speed of regulating submerged pump by the submerged pump motor according to comparing result changes its output discharge;
Water discharging valve is used for correspondingly increasing or reduce its aperture according to the change of institute's test engine power.
Preferably, in above-mentioned hydraulic dynamometer circulating water pressure control device, the check point of the check point of the recirculated water pressure of supply water that feeds back to frequency converter that pressure unit detects and the recirculated water pressure of supply water of delivering to test bay is at same position.
Preferably, in above-mentioned hydraulic dynamometer circulating water pressure control device, the measurement instrument of frequency converter, pressure unit and test bay is installed separately.
In the above-described embodiments, the water discharging valve of dynamometer body load beam during as engine test, when institute's test engine power increases, the water discharging valve aperture of dynamometer increases, dynamometer water supply flow and power are complementary, show that recirculated water water inlet place pressure transmitter measurement value reduces, pressure unit before the dynamometer recirculated water water intaking valve detects force value, directly the feedback electric signal is given frequency converter, frequency converter detects automatically, compare with the established standards value, thereby pump motor rotating speed under the regulator solution changes submerged pump output discharge.When needing to increase flow of inlet water, Frequency Converter Control submerged pump motor speed is accelerated, and when power reduced, when reducing flow of inlet water, Frequency Converter Control submerged pump motor speed slowed down.Pressure unit constantly detects the intake pressure value, the feedback electric signal forms closed loop to frequency converter, intake pressure is constantly revised, up to the value of being near the mark, improved hydraulic dynamometer recirculated water pressure of supply water stability, overcome in the prior art because the electric control valve control accuracy is lower, pressure surge has exceeded the requirement of dynamometer, influence the measuring accuracy of engine capacity, moment of torsion and rotating speed, and then cause hydraulic dynamometer recirculated water pressure of supply water less stable problem.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the hydraulic dynamometer circulating water pressure control device synoptic diagram that is used for test bay according to an embodiment of the invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Fig. 1 shows the hydraulic dynamometer circulating water pressure control device synoptic diagram that is used for test bay according to an embodiment of the invention, comprise: the water discharging valve 10 on pipeline 4 and thereon frequency converter 1, submerged pump motor, submerged pump 2, safety relief valve 3, filtrator 5, buffer tank 6, pressure unit 7, recirculated water water inlet switch 8, dynamometer 9, recirculated water drainage switch and the dynamometer body of being linked in sequence, wherein
Frequency converter 1 is used for the force value of pressure unit 7 detections and the standard value of setting are compared, and the rotating speed of regulating submerged pump by the submerged pump motor according to comparing result changes its output discharge;
Water discharging valve is used for correspondingly increasing or reduce its aperture according to the change of institute's test engine power.
In the present embodiment, the water discharging valve of dynamometer body load beam during as engine test, when institute's test engine power increases, the water discharging valve aperture of dynamometer increases, dynamometer water supply flow and power are complementary, show that recirculated water water inlet place pressure transmitter measurement value reduces, pressure unit before the dynamometer recirculated water water intaking valve detects force value, directly the feedback electric signal is given frequency converter, frequency converter detects automatically, compare with the established standards value, thereby pump motor rotating speed under the regulator solution changes submerged pump output discharge.When needing to increase flow of inlet water, Frequency Converter Control submerged pump motor speed is accelerated, and when power reduced, when reducing flow of inlet water, Frequency Converter Control submerged pump motor speed slowed down.Pressure unit constantly detects the intake pressure value, the feedback electric signal forms closed loop to frequency converter, intake pressure is constantly revised, up to the value of being near the mark, improved hydraulic dynamometer recirculated water pressure of supply water stability, overcome in the prior art because the electric control valve control accuracy is lower, pressure surge has exceeded the requirement of dynamometer, influence the measuring accuracy of engine capacity, moment of torsion and rotating speed, and then cause hydraulic dynamometer recirculated water pressure of supply water less stable problem.
Preferably, in above-mentioned hydraulic dynamometer circulating water pressure control device, the check point of the check point of the recirculated water pressure of supply water that feeds back to frequency converter that pressure unit detects and the recirculated water pressure of supply water of delivering to test bay is at same position.
Preferably, in above-mentioned hydraulic dynamometer circulating water pressure control device, the measurement instrument of frequency converter, pressure unit and test bay is installed separately, and isolates with other measuring-signal and separates, and has avoided the interference to other instrument.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. hydraulic dynamometer circulating water pressure control device that is used for test bay, it is characterized in that, comprise: the water discharging valve on pipeline and thereon frequency converter, submerged pump motor, submerged pump, safety relief valve, filtrator, buffer tank, pressure unit, recirculated water water inlet switch, dynamometer, recirculated water drainage switch and the dynamometer body of being linked in sequence, wherein
Described frequency converter is used for the force value of described pressure unit detection and the standard value of setting are compared, and the rotating speed of regulating described submerged pump by the submerged pump motor according to comparing result changes its output discharge;
Described water discharging valve is used for correspondingly increasing or reduce its aperture according to the change of institute's test engine power.
2. hydraulic dynamometer circulating water pressure control device according to claim 1, it is characterized in that the check point of the check point of the recirculated water pressure of supply water that feeds back to described frequency converter that described pressure unit detects and the recirculated water pressure of supply water of delivering to test bay is at same position.
3. hydraulic dynamometer circulating water pressure control device according to claim 1 is characterized in that, the measurement instrument of described frequency converter, described pressure unit and test bay is installed separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009101802140A CN101650262B (en) | 2009-10-09 | 2009-10-09 | Circulating water pressure control device of hydraulic dynamometer used for test bed |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101802140A CN101650262B (en) | 2009-10-09 | 2009-10-09 | Circulating water pressure control device of hydraulic dynamometer used for test bed |
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| CN101650262A CN101650262A (en) | 2010-02-17 |
| CN101650262B true CN101650262B (en) | 2011-06-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879141A (en) * | 2012-08-14 | 2013-01-16 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for accurately stabilizing pressure in periodical water supply system of hydraulic dynamometer |
| CN111579135A (en) * | 2020-05-25 | 2020-08-25 | 中国船舶重工集团公司第七0三研究所 | Measurement and control method of blade type hydraulic dynamometer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101968401B (en) * | 2009-07-28 | 2012-09-26 | 北汽福田汽车股份有限公司 | Cooling fluid temperature control system for testing engine performance |
| CN102680059B (en) * | 2012-05-24 | 2013-11-06 | 哈尔滨电机厂有限责任公司 | Method for reducing small-flow calibration error of test bed flow meter of hydraulic machine model |
| CN103335762B (en) * | 2013-07-09 | 2015-01-14 | 中石化石油工程机械有限公司第四机械厂 | Performance test method and performance test device of high-power fracturing pump truck |
| CN105738022B (en) * | 2016-02-26 | 2018-06-19 | 广东恒迅建设集团有限公司 | A kind of hydraulic giant for fire protection switchs torque automatic testing equipment |
| CN106013322A (en) * | 2016-06-07 | 2016-10-12 | 中国南方航空工业(集团)有限公司 | Water supply system for high-speed hydraulic dynamometer and circulating water pressure control method |
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| CN1730948A (en) * | 2005-08-26 | 2006-02-08 | 浙江科技学院 | Pressure and flow variation control method and control system for water pump |
| FR2915577A1 (en) * | 2007-04-24 | 2008-10-31 | Renault Sas | INTERNAL COMBUSTION ENGINE TEST BENCH WITH FAST ENGINE COOLING MEANS |
| CN201277895Y (en) * | 2008-10-23 | 2009-07-22 | 河南柴油机重工有限责任公司 | Water supply apparatus for hydraulic dynamometer |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1730948A (en) * | 2005-08-26 | 2006-02-08 | 浙江科技学院 | Pressure and flow variation control method and control system for water pump |
| FR2915577A1 (en) * | 2007-04-24 | 2008-10-31 | Renault Sas | INTERNAL COMBUSTION ENGINE TEST BENCH WITH FAST ENGINE COOLING MEANS |
| CN201277895Y (en) * | 2008-10-23 | 2009-07-22 | 河南柴油机重工有限责任公司 | Water supply apparatus for hydraulic dynamometer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879141A (en) * | 2012-08-14 | 2013-01-16 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for accurately stabilizing pressure in periodical water supply system of hydraulic dynamometer |
| CN102879141B (en) * | 2012-08-14 | 2015-06-10 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for accurately stabilizing pressure in periodical water supply system of hydraulic dynamometer |
| CN111579135A (en) * | 2020-05-25 | 2020-08-25 | 中国船舶重工集团公司第七0三研究所 | Measurement and control method of blade type hydraulic dynamometer |
| CN111579135B (en) * | 2020-05-25 | 2021-07-27 | 中国船舶重工集团公司第七0三研究所 | Measurement and control method of blade type hydraulic dynamometer |
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| CN101650262A (en) | 2010-02-17 |
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Address after: 412002 Dong Jia Duan, Lusong District, Zhuzhou City, Hunan Province Patentee after: China Hangfa South Industrial Co. Ltd. Address before: 412002 Dong Jia Duan, Lusong District, Zhuzhou City, Hunan Province Patentee before: China Southern Airlines Industry (Group) Co., Ltd. |