CN112696348A - Efficiency calibration method for fixed displacement hydraulic pump - Google Patents
Efficiency calibration method for fixed displacement hydraulic pump Download PDFInfo
- Publication number
- CN112696348A CN112696348A CN202011565435.2A CN202011565435A CN112696348A CN 112696348 A CN112696348 A CN 112696348A CN 202011565435 A CN202011565435 A CN 202011565435A CN 112696348 A CN112696348 A CN 112696348A
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- hydraulic pump
- efficiency
- fixed displacement
- oil
- gear box
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000003921 oil Substances 0.000 claims description 43
- 230000001502 supplementing effect Effects 0.000 claims description 21
- 230000003750 conditioning effect Effects 0.000 claims description 12
- 239000010687 lubricating oil Substances 0.000 claims description 12
- 241001125929 Trisopterus luscus Species 0.000 claims description 4
- 238000004088 simulation Methods 0.000 abstract description 13
- 239000003638 chemical reducing agent Substances 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 abstract description 3
- 238000004364 calculation method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The invention belongs to the technical field of hydraulic loading and automatic control, and particularly relates to an efficiency calibration method for a fixed displacement hydraulic pump. According to the invention, the hydraulic pump efficiency curve of the loading working condition of the composite tester can be fitted according to the test requirement of the tester, so that the problem that the efficiency of the fixed displacement hydraulic pump in the current hydraulic simulation loading loop is not accurate is solved, and the simulation loading precision and accuracy of the tester are improved; meanwhile, the invention can fit efficiency curves at different temperatures according to different temperature requirements, and has stronger practicability. The invention can be applied to an aircraft engine accessory casing tester and a helicopter main reducer tester, is used for carrying out efficiency calibration on a fixed displacement hydraulic pump in a hydraulic simulation loading loop in the tester, and solves the problem of inaccurate efficiency of the fixed displacement hydraulic pump in the hydraulic simulation loading loop.
Description
Technical Field
The invention belongs to the technical field of hydraulic loading and automatic control, and particularly relates to an efficiency calibration method for a fixed displacement hydraulic pump.
Background
The engine accessory casing or the helicopter main speed reduction needs to be subjected to a factory test before the factory leaves, most of the accessory loading ends of the conventional testers are loaded in an analog mode in the test process, namely the accessory loading ends are connected with a constant displacement hydraulic pump through a speed reduction gear box to carry out hydraulic loading. According to a hydraulic pump power calculation formula, the accuracy of the efficiency of the hydraulic pump directly influences the calculation result of the loading power; the efficiency of the hydraulic pump is related to various factors such as oil temperature and oil drainage quantity, so that the efficiency of the hydraulic pump needs to be calibrated after the hydraulic pump is used for a certain time.
At present, the tester does not have the function of calibrating the hydraulic pump on line, so that the efficiency of the hydraulic pump mostly adopts empirical values, and the actual loading power and the calculated power have great deviation.
Disclosure of Invention
The invention aims to provide an efficiency calibration method for a fixed displacement hydraulic pump.
The purpose of the invention is realized by the following technical scheme: the method comprises the following steps:
step 1: building an efficiency calibration device of a fixed displacement hydraulic pump; the efficiency calibration device of the fixed displacement hydraulic pump comprises a variable frequency driving system, a dragging motor, a speed-up gear box, a hydraulic pump to be calibrated, a signal conditioning box, an oil supplementing and loading station, a gear box lubricating oil station and a PLC acquisition and control system; the hydraulic pump to be calibrated is connected with the speed-up gear box through a torque meter, and the speed-up gear box is connected with the driving end of the dragging motor through a coupler; the inlet and outlet oil pipes of the hydraulic pump to be calibrated are connected with the oil supplementing and loading station, and the inlet and outlet oil pipes of the hydraulic pump to be calibrated are provided with pressure sensors; the oil supplementing and loading station comprises a motor, a servo valve, an oil tank and a flowmeter; the signal conditioning box receives signals of the pressure sensor and the flowmeter; the dragging motor is provided with an encoder, and the dragging motor and the encoder are connected with a variable frequency driving system through a cable; the gear box lubricating oil station is connected with the speed-up gear box; the PLC acquisition and control system is connected with the variable frequency driving system and the signal conditioning box;
step 2: after the efficiency calibration device of the fixed displacement hydraulic pump is completed, the system is powered on, and whether each signal on site is correct is verified;
and step 3: respectively starting a lubricating oil station and an oil supplementing and loading station of the gear box; after each signal is stable, starting a variable frequency driving system, setting different driving rotating speeds of the device, loading a hydraulic pump to be calibrated through adjusting an oil supplementing loading station at different rotating speeds, and acquiring outlet oil pressure Pout, inlet oil pressure Pin, Flow and rotating speed V and torque T of an input end of the hydraulic pump by a PLC acquisition and control system;
and 4, step 4: calculating and calibrating the efficiency eta of the hydraulic pump to be calibrated according to the data acquired by the PLC acquisition and control system;
the invention has the beneficial effects that:
according to the invention, the hydraulic pump efficiency curve of the loading working condition of the composite tester can be fitted according to the test requirement of the tester, so that the problem that the efficiency of the fixed displacement hydraulic pump in the current hydraulic simulation loading loop is not accurate is solved, and the simulation loading precision and accuracy of the tester are improved; meanwhile, the invention can fit efficiency curves at different temperatures according to different temperature requirements, and has stronger practicability. The invention can be applied to an aircraft engine accessory casing tester and a helicopter main reducer tester, is used for carrying out efficiency calibration on a fixed displacement hydraulic pump in a hydraulic simulation loading loop in the tester, and solves the problem of inaccurate efficiency of the fixed displacement hydraulic pump in the hydraulic simulation loading loop.
Drawings
Fig. 1 is an overall schematic diagram of an efficiency calibration device of a fixed displacement hydraulic pump in the invention.
Fig. 2 is an architectural diagram of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The invention relates to the field of hydraulic loading and automatic control, which is applied to an aircraft engine accessory casing tester and a helicopter main reducer tester and is used for carrying out efficiency calibration on a fixed displacement hydraulic pump in a hydraulic simulation loading loop in the tester. In order to solve the problem that the efficiency of a fixed displacement hydraulic pump in a hydraulic simulation loading loop is inaccurate, the invention provides an efficiency calibration method of the fixed displacement hydraulic pump, which comprises the following steps:
step 1: building an efficiency calibration device of a fixed displacement hydraulic pump;
the efficiency calibration device of the fixed displacement hydraulic pump is shown in fig. 1 and comprises a hydraulic pump 1 to be calibrated, a torque meter 2, a speed-increasing gear box 3, a coupler 4, a dragging motor 5, an encoder 6, an equipment support 7, a gear box lubricating oil station 8, an oil supplementing and loading station 9, a signal conditioning box 10, a pressure sensor 11, a hydraulic pump oil pipe 12, a PLC acquisition and control system, a variable frequency drive system, an upper computer calibration program and the like. The oil supplementing and loading station comprises a motor, a servo valve, an oil tank, a flowmeter and other equipment. The hydraulic pump to be calibrated is connected with the speed-up gear box through a torque meter, and the speed-up gear box is connected with the driving end of the dragging motor through a coupler; the inlet and outlet oil pipes of the hydraulic pump to be calibrated are connected with the oil supplementing and loading station, and the inlet and outlet oil pipes of the hydraulic pump to be calibrated are provided with pressure sensors; the oil supplementing and loading station comprises a motor, a servo valve, an oil tank and a flowmeter; the signal conditioning box receives signals of the pressure sensor and the flowmeter; the dragging motor is provided with an encoder, and the dragging motor and the encoder are connected with a variable frequency driving system through a cable; the gear box lubricating oil station is connected with the speed-up gear box; and the PLC acquisition and control system is connected with the variable-frequency driving system and the signal conditioning box.
Step 2: after the efficiency calibration device of the fixed displacement hydraulic pump is completed, the system is powered on, and whether each signal on site is correct is verified;
and step 3: respectively starting a lubricating oil station and an oil supplementing and loading station of the gear box; after each signal is stable, starting a variable frequency driving system, setting different driving rotating speeds of the device, loading a hydraulic pump to be calibrated through adjusting an oil supplementing loading station at different rotating speeds, and acquiring outlet oil pressure Pout, inlet oil pressure Pin, Flow and rotating speed V and torque T of an input end of the hydraulic pump by a PLC acquisition and control system;
and 4, step 4: calculating and calibrating the efficiency eta of the hydraulic pump to be calibrated according to the data acquired by the PLC acquisition and control system;
the invention can meet the requirement of the aircraft engine accessory casing tester and the helicopter main reducer tester for carrying out efficiency calibration on the fixed displacement hydraulic pump in the hydraulic simulation loading loop. The invention comprises an independent dragging motor 5, an encoder 6, a gear box lubricating oil station 8 and an oil supplementing and loading station 9, so that the invention can obtain accurate rotating speed. The invention comprises a torque meter 2 and a pressure transmitter 11, so that each parameter of the hydraulic pump can be obtained in real time. The efficiency calibration device for the fixed displacement hydraulic pump has the advantages of simple structure, simplicity and convenience in use and the like.
Example 1:
the specific embodiment of the invention is as follows: the efficiency calibration device of the fixed displacement hydraulic pump mainly comprises a driving system, a dragging motor, a speed-up gear box, a torque meter, a calibrated hydraulic pump, a signal conditioning box, a pressure sensor, a flowmeter, an oil supplementing and loading station, a gear box lubricating oil station, a PLC system, an upper computer calibration program and the like.
Step 1: before the test, the calibrated hydraulic pump is arranged on a speed-up gear box connected with a dragging motor, the dragging motor 5 and an encoder 6 are connected with a variable frequency driving system through cables, and the calibrated hydraulic pump 1, a torquemeter 2 and a speed-up gear box 3 are connected with the driving end of the dragging motor 5 through a coupler 4. Connecting an inlet and outlet oil pipe 12 of the calibrated hydraulic pump 1 with a hydraulic loading oil supplementing station 9, and connecting a corresponding pressure transmitter 11; signals of each sensor are accessed into the signal conditioning box 10; the PLC acquisition and control system is connected with the variable frequency driving system and the signal conditioning box;
step 2: after the field hardware connection is finished, electrifying the system and checking whether each field signal is correct or not;
and step 3: respectively starting a gear box lubricating oil station 8 and an oil supplementing and loading station 9; after each signal is stable, the variable frequency driving system is started, different driving rotating speeds of the device are given, the calibrated hydraulic pump 1 is loaded through adjusting the oil supplementing loading station 9 at different rotating speeds, and the PLC acquisition and control system acquires hydraulic pump outlet oil pressure Pout, inlet oil pressure Pin, Flow and hydraulic pump input rotating speed V and torque T.
And 4, step 4: and starting a software calibration program on an interface of the upper computer, loading different powers according to different rotating speeds of the hydraulic pump, completing the efficiency calibration work of the hydraulic pump, and obtaining the efficiency value or the efficiency curve of the currently tested hydraulic pump.
The output power of the hydraulic pump is as follows:
wherein η is the hydraulic pump efficiency;
the input power of the hydraulic pump is the input shaft power of the hydraulic pump, and the calculation formula is as follows:
according to the law of conservation of energy, PGo out＝PIntoThen η can be calculated as follows:
the PLC acquisition and control system transmits the acquired sensor data to upper computer software, and the upper computer software calculates the rotating speed and efficiency data according to the formula and fits the rotating speed and efficiency data into an efficiency curve.
The efficiency calibration device for the fixed displacement hydraulic pump can fit a hydraulic pump efficiency curve of a loading working condition of a composite tester according to the test requirements of the tester, solves the problem that the efficiency of the fixed displacement hydraulic pump in the current hydraulic simulation loading loop is not accurate, and improves the simulation loading precision and accuracy of the tester; meanwhile, the invention can fit efficiency curves at different temperatures according to different temperature requirements, and has stronger practicability.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. The efficiency calibration method of the fixed displacement hydraulic pump is characterized by comprising the following steps:
step 1: building an efficiency calibration device of a fixed displacement hydraulic pump; the efficiency calibration device of the fixed displacement hydraulic pump comprises a variable frequency driving system, a dragging motor, a speed-up gear box, a hydraulic pump to be calibrated, a signal conditioning box, an oil supplementing and loading station, a gear box lubricating oil station and a PLC acquisition and control system; the hydraulic pump to be calibrated is connected with the speed-up gear box through a torque meter, and the speed-up gear box is connected with the driving end of the dragging motor through a coupler; the inlet and outlet oil pipes of the hydraulic pump to be calibrated are connected with the oil supplementing and loading station, and the inlet and outlet oil pipes of the hydraulic pump to be calibrated are provided with pressure sensors; the oil supplementing and loading station comprises a motor, a servo valve, an oil tank and a flowmeter; the signal conditioning box receives signals of the pressure sensor and the flowmeter; the dragging motor is provided with an encoder, and the dragging motor and the encoder are connected with a variable frequency driving system through a cable; the gear box lubricating oil station is connected with the speed-up gear box; the PLC acquisition and control system is connected with the variable frequency driving system and the signal conditioning box;
step 2: after the efficiency calibration device of the fixed displacement hydraulic pump is completed, the system is powered on, and whether each signal on site is correct is verified;
and step 3: respectively starting a lubricating oil station and an oil supplementing and loading station of the gear box; after each signal is stable, starting a variable frequency driving system, setting different driving rotating speeds of the device, loading a hydraulic pump to be calibrated through adjusting an oil supplementing loading station at different rotating speeds, and acquiring outlet oil pressure Pout, inlet oil pressure Pin, Flow and rotating speed V and torque T of an input end of the hydraulic pump by a PLC acquisition and control system;
and 4, step 4: calculating and calibrating the efficiency eta of the hydraulic pump to be calibrated according to the data acquired by the PLC acquisition and control system;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011565435.2A CN112696348A (en) | 2020-12-25 | 2020-12-25 | Efficiency calibration method for fixed displacement hydraulic pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011565435.2A CN112696348A (en) | 2020-12-25 | 2020-12-25 | Efficiency calibration method for fixed displacement hydraulic pump |
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| CN112696348A true CN112696348A (en) | 2021-04-23 |
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| CN202011565435.2A Pending CN112696348A (en) | 2020-12-25 | 2020-12-25 | Efficiency calibration method for fixed displacement hydraulic pump |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410719A (en) * | 2013-03-12 | 2013-11-27 | 北京理工大学 | Capacity electricity loaded hydraulic pump testing device |
| CN104196827A (en) * | 2014-08-18 | 2014-12-10 | 江苏大学 | Efficiency test bed of electric-hydraulic proportional pump control motor system |
| CN107605722A (en) * | 2017-10-20 | 2018-01-19 | 四川川润液压润滑设备有限公司 | A kind of efficiency of pump detection means and its detection method |
| CN109654009A (en) * | 2019-02-21 | 2019-04-19 | 燕山大学 | A kind of hydraulic pump motor Performance Test System and its test method |
| CN110985367A (en) * | 2019-12-17 | 2020-04-10 | 之江实验室 | High-speed hydraulic pump performance test device |
| CN212155113U (en) * | 2020-01-09 | 2020-12-15 | 上海辛金路流体技术有限公司 | Hydraulic pump performance test bench |
-
2020
- 2020-12-25 CN CN202011565435.2A patent/CN112696348A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410719A (en) * | 2013-03-12 | 2013-11-27 | 北京理工大学 | Capacity electricity loaded hydraulic pump testing device |
| CN104196827A (en) * | 2014-08-18 | 2014-12-10 | 江苏大学 | Efficiency test bed of electric-hydraulic proportional pump control motor system |
| CN107605722A (en) * | 2017-10-20 | 2018-01-19 | 四川川润液压润滑设备有限公司 | A kind of efficiency of pump detection means and its detection method |
| CN109654009A (en) * | 2019-02-21 | 2019-04-19 | 燕山大学 | A kind of hydraulic pump motor Performance Test System and its test method |
| CN110985367A (en) * | 2019-12-17 | 2020-04-10 | 之江实验室 | High-speed hydraulic pump performance test device |
| CN212155113U (en) * | 2020-01-09 | 2020-12-15 | 上海辛金路流体技术有限公司 | Hydraulic pump performance test bench |
Non-Patent Citations (1)
| Title |
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| 刘素红等: "液压泵、液压马达容积效率检测方法的研究", 《流体传动与控制》 * |
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Application publication date: 20210423 |