CN104196827A - Efficiency test bed of electric-hydraulic proportional pump control motor system - Google Patents
Efficiency test bed of electric-hydraulic proportional pump control motor system Download PDFInfo
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- CN104196827A CN104196827A CN201410405732.9A CN201410405732A CN104196827A CN 104196827 A CN104196827 A CN 104196827A CN 201410405732 A CN201410405732 A CN 201410405732A CN 104196827 A CN104196827 A CN 104196827A
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Abstract
An efficient test bed of the electric-hydraulic proportional pump control motor system comprises a test bed measurement and control system, a pump control motor system, an electric-hydraulic proportional servo system, an oil replenishing system, a cooling system, a resistance loading system, an engine, an electromagnetic clutch and a speed raising box. The test bed measurement and control system calculates the input power and the output power of the pump control motor system by measuring the rotating speed and the torque at the input end and the output end of the pump control motor system so that the efficiency value of the pump control motor system can be obtained. The efficiency test bed of the electric-hydraulic proportional pump control motor system has the advantages that system oil supply pressure is stable and precise, the static and dynamic performance of the test bed is improved, and the test bed has more operability and the reliability; the resistance loading system is simple and practical, and the controllability is excellent; the oil temperature is adjusted through the test bed measurement and control system, energy consumption can be better lowered, the efficiency is improved, and the precision of test data is also greatly improved.
Description
Technical field
The present invention relates to a kind of efficiency test stand of Hydraulic Power Transmission System, a kind of efficiency test stand of controlled by electro-hydraulic proportional pump motor system is provided especially.
Background technique
Hydraulic mechanical stepless gearbox (HMT) by Hydraulic Power Transmission System and machine driven system and minute, the mechanism of confluxing forms, that a kind of hydraulic power stream flows Novel transmission form in parallel with mechanical output, by mechanical transmission, realize transmission high efficiency, by hydraulic transmission, combine and realize stepless change with mechanical transmission.
Hydraulic mechanical stepless gearbox comprises Hydraulic Power Transmission System and machine driven system.And machine driven system is by transmission shaft driven, so its efficiency is very high, generally can reach 98%.The efficiency of Hydraulic Power Transmission System, with and the efficiency of the shared power decision hydromechanical transmission of transmission.For example:
Hydraulicefficiency 85%, mechanical transmission 98%.If hydraulic transmission power accounts for 20%, mechanical transmission power accounts for 80%.Total transmission efficiency is 85%*0.2+98%*0.8=0.954.
Hydraulicefficiency 60%, mechanical transmission 98%.If hydraulic transmission power accounts for 40%, mechanical transmission power accounts for 60%.Total transmission efficiency is 60%*0.4+98%*0.6=0.828.
The proportion that hydraulicefficiency and transfer motion power account for total output has as can be seen here determined the efficiency of hydromechanical transmission.Proportion compares control by discharge capacity, and efficiency is that Hydraulic Power Transmission System self property determines.
The Hydraulic Power Transmission System of hydraulic mechanical stepless gearbox mainly consists of variable displacement pump-fixed displacement motor, and its rotating speed is that the control by servomechanism realizes.Servomechanism adopts electro-hydraulic proportional control technology, can hydraulic system be realized and being controlled according to the size of input electrical signal is proportional continuously, and its performance has a significant impact for the performance tool of Hydraulic Pump-Motor System.Hydraulic Power Transmission System efficiency is main relevant to rotating speed, oil pressure and discharge capacity.
To the research master of controlled by electro-hydraulic proportional pump motor system efficiency, be at present that foundation by simulation model draws controlled by electro-hydraulic proportional pump motor system efficiency value to the simulation of each dynamic parameters, due to the many factors that needs in simulation process to consider, model process of establishing be easy to omit or consider less than factor, so the accuracy of the data that simulation model draws and authenticity need to further be verified by test-bed.Special also fewer for the stand of controlled by electro-hydraulic proportional pump motor system efficiency test at present, and the accuracy of test data is generally not high.
Summary of the invention
Goal of the invention: the efficiency test stand of controlled by electro-hydraulic proportional pump motor system that the object of this invention is to provide a kind of efficiency of the Hydraulic Power Transmission System that is specifically designed to research hydraulic mechanical stepless gearbox.The present invention is responsible for the collection of test data and the management and control of process of the test, by the analysing and processing to Hydraulic Pump-Motor System, electrohydraulic scale servo system, oil-supplementing system, cooling system and Resistance-load system data information, in debug system, respectively carry out parameter and the state of components and parts, make the various performance parameters of test bench reach test requirements document, realize the automation of test.
Technological scheme: a kind of efficiency test stand of controlled by electro-hydraulic proportional pump motor system, comprise testing bench frame control system, Hydraulic Pump-Motor System, electrohydraulic scale servo system, oil-supplementing system, cooling system, Resistance-load system, motor, magnetic clutch and raising speed case, described motor is connected with raising speed case by magnetic clutch, described raising speed case is connected with the input end of Hydraulic Pump-Motor System, and the output terminal of described Hydraulic Pump-Motor System is connected with Resistance-load system; Described Hydraulic Pump-Motor System comprises oblique tray type plunger variable displacement pump and fixed displacement motor; The swash plate angle that described electrohydraulic scale servo system is controlled oblique tray type plunger variable displacement pump realizes the control to oblique tray type plunger variable displacement pump discharge capacity; Described oil-supplementing system is given respectively working connection and the electrohydraulic scale servo system oil circuit control fuel feeding of Hydraulic Pump-Motor System; Described cooling system is controlled the temperature of whole hydraulic system oil liquid; Described testing bench frame control system is controlled the input of power by magnetic clutch, described testing bench frame control system is realized the control to oblique tray type plunger variable displacement pump discharge capacity by controlling electrohydraulic scale servo system; Thereby described testing bench frame control system calculates respectively by measuring the rotating speed of Hydraulic Pump-Motor System input end and output terminal and torque the efficiency value that Hydraulic Pump-Motor System input power and output power obtain Hydraulic Pump-Motor System.
Preference, described oil-supplementing system comprises slippage pump, drive motor and the first relief valve, described drive motor drives slippage pump work, and it is respectively working connection, electrohydraulic scale servo system oil circuit control fuel feeding and the first relief valve oil sump tank of Hydraulic Pump-Motor System that slippage pump high-voltage oil liquid from fuel tank oil suction flows to.
Preference, described Hydraulic Pump-Motor System also comprises variable displacement pump output terminal flowmeter, variable displacement pump delivery guage, fixed displacement motor output terminal flowmeter, fixed displacement motor delivery guage and fixed displacement motor output end pressure sensor, described fixed displacement motor output end pressure sensor feeds back to the force value of fixed displacement motor output terminal the drive motor of oil-supplementing system, and the value that described variable displacement pump output terminal flowmeter, variable displacement pump delivery guage, fixed displacement motor output terminal flowmeter and fixed displacement motor delivery guage record passes to testing bench frame control system.
Preference, described electrohydraulic scale servo system comprises displacement control oil cylinder, amplifier, servo-system three position four-way electromagnetic valve, servo-system pressure transducer and servo-system one-way valve; Described servo-system three position four-way electromagnetic valve is controlled the deflection of the motion promotion oblique tray type plunger variable displacement pump swash plate of displacement control oil cylinder piston, and described testing bench frame control system is controlled the action of servo-system three position four-way electromagnetic valve by amplifier; The pressure of servo-system three position four-way electromagnetic valve is delivered to the first relief valve of oil-supplementing system by servo-system pressure transducer, by controlling the opening of the first relief valve, guarantee the normal operation of electrohydraulic scale servo system, servo-system one-way valve stops the backflow of fluid.
Preference, described Resistance-load system comprises friction clutch, output terminal torque sensor, output terminal speed probe, load cylinder, loading system three position four-way electromagnetic valve, load pump, the second relief valve, loculus pressure gauge, large cavity pressure table and large cavity pressure sensor, the output terminal of described Hydraulic Pump-Motor System is connected with Resistance-load system by friction clutch, the torque and rotational speed of output terminal records and passes to testing bench frame control system by output terminal torque sensor and output terminal speed probe respectively, described load pump is connected with load cylinder by loading system three position four-way electromagnetic valve, described the second relief valve is in parallel with load pump, the force value of large cavity pressure sensor feeds back to the second relief valve, little cavity pressure and the large cavity pressure value of the load cylinder that described loculus pressure gauge and large cavity pressure table record pass to testing bench frame control system.
The present invention is for measuring the steady state load characteristic of controlled by electro-hydraulic proportional pump motor system, under different power inputs and loading condition, by electric control system and TT&C system, test-bed signal is gathered and controlled, detect the performance parameter of controlled by electro-hydraulic proportional pump motor system critical piece.Testing bench frame control system is by torque rotary speed sensor, pressure gauge, flowmeter, data to be gathered, and by the relief valve of electrohydraulic scale servo system, clutch, oil-supplementing system, cooling system, Resistance-load system and the Control that is stressed, controls.
Between motor and raising speed case, with magnetic clutch, be connected, when motor is during in steady working condition, engaging clutch, the effect of raising speed case is that square falls in raising speed, by rotational speed and torque instrument, measure output terminal torque, the rotating speed of input torque, rotating speed and the motor of pump, the flow of flowmeter survey hydraulic system is to calculate the volumetric efficiency of hydraulic system.Resistance-load system is connected with hydraulic system by friction clutcch, by different loading resistance simulation motor load.
The closed loop control of realization to working connection pressure, slippage pump motor and Resistance-load system pressure, makes system charge oil pressure stable, accurate, has promoted the Static and dynamic performance of test-bed, makes test-bed have more operability and reliability.
By cooling system, fuel tank oil temperature is controlled, when oil temperature surpasses setting value, testing bench frame control system Controlled cooling system pump is lowered the temperature.
Beneficial effect: 1, use three pressure transducers, the closed loop control of realization to working connection pressure, slippage pump motor and Resistance-load system pressure, make system charge oil pressure stable, accurate, promote the Static and dynamic performance of test-bed, made test-bed have more operability and reliability; 2, Resistance-load system adopts hydraulic loaded, the pressure of solenoidoperated cluthes friction plate, thereby the size of regulating load, and this Resistance-load system architecture is simple, and controllability is superior; 3, Hydraulic Pump-Motor System, electrohydraulic scale servo system, oil-supplementing system, cooling system are shared to a fuel tank, and regulate oil temperature by testing bench frame control system, be conducive to reduce energy consumption, raise the efficiency, test data validity is also greatly improved.Testing bench frame control system collecting sensor signal, and according to collecting delivering signal, test-bed is carried out to intelligent control.
Accompanying drawing explanation
Fig. 1 is control principle drawing of the present invention;
Fig. 2 is control principle block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As illustrated in fig. 1 and 2, a kind of controlled by electro-hydraulic proportional pump motor system efficiency test stand, comprises testing bench frame control system 1, Hydraulic Pump-Motor System 2, electrohydraulic scale servo system 3, oil-supplementing system 4, cooling system 5 and Resistance-load system 6.
Controlled by electro-hydraulic proportional pump motor system efficiency test structural drawing, motor 7 outputting powers, by magnetic clutch 8 by transmission of power to raising speed case 9, its effect is that square falls in raising speed, by input torque speed probe, measure input torque and the rotating speed of Hydraulic Pump-Motor System 2, the output torque and rotational speed of measuring Hydraulic Pump-Motor System 2 by output torque rotary speed sensor, Resistance-load system 6 is connected with the output torque rotary speed sensor on Hydraulic Pump-Motor System 2 right sides through friction clutch 31.By electrohydraulic scale servo system 3, regulate the discharge capacity of Hydraulic Pump-Motor System 2, by the normal operation of oil-supplementing system 4 and cooling system 5 proof tests, sensor feeds back to testing bench frame control system 1 by test stand relevant parameter, 1 pair of test parameters of testing bench frame control system is analyzed, and output order, stand is tested according to the requirement of setting.
Controlled by electro-hydraulic proportional pump motor system, mainly comprises Hydraulic Pump-Motor System 2, electrohydraulic scale servo system 3 and oil-supplementing system 4.Described oil-supplementing system 4 comprises slippage pump 41, drive motor 42 and the first relief valve 43, described drive motor 42 drives slippage pump 41 work, and it is respectively working connection, electrohydraulic scale servo system 3 oil circuit control fuel feeding and first relief valve 43 oil sump tanks of Hydraulic Pump-Motor System 2 that slippage pump 41 high-voltage oil liquid from fuel tank oil suction flows to.Pressure oil will filter and the first relief valve 43 voltage stabilizings through filter,
Described Hydraulic Pump-Motor System 2 also comprises variable displacement pump output terminal flowmeter 23, variable displacement pump delivery guage 24, fixed displacement motor output terminal flowmeter 25, fixed displacement motor delivery guage 26 and fixed displacement motor output end pressure sensor 27, described fixed displacement motor output end pressure sensor 27 feeds back to the force value of fixed displacement motor output terminal the drive motor 42 of oil-supplementing system 4, then guarantees the pressure of Hydraulic Pump-Motor System 2 in allowed limits; The value that described variable displacement pump output terminal flowmeter 23, variable displacement pump delivery guage 24, fixed displacement motor output terminal flowmeter 25 and fixed displacement motor delivery guage 26 record passes to testing bench frame control system 1.
Described electrohydraulic scale servo system 3 comprises displacement control oil cylinder 31, amplifier 32, servo-system three position four-way electromagnetic valve 33, servo-system pressure transducer 34 and servo-system one-way valve 35; The motion that described servo-system three position four-way electromagnetic valve 33 is controlled displacement control oil cylinder 31 pistons promotes the deflection of oblique tray type plunger variable displacement pump 21 swash plates, and described testing bench frame control system 1 is controlled the action of servo-system three position four-way electromagnetic valve 33 by amplifier 32; The pressure of servo-system three position four-way electromagnetic valve 33 is delivered to the first relief valve 43 of oil-supplementing system 4 by servo-system pressure transducer 34, by controlling the opening of the first relief valve 43, guarantee the normal operation of electrohydraulic scale servo system 3, servo-system one-way valve 35 stops the backflow of fluid.
Cooling system, drives coolant pump to lower the temperature to system by motor, and cooling unit is set to guarantee cooling effect, and relief valve guarantees the control of cooling system pressure in the reasonable scope, and this system also comprises level meter and thermometer.
As illustrated in fig. 1 and 2, described Resistance-load system 6 comprises friction clutch 61, output terminal torque sensor 62, output terminal speed probe 63, load cylinder 64, loading system three position four-way electromagnetic valve 65, load pump 66, the second relief valve 67, loculus pressure gauge 68, large cavity pressure table 69 and large cavity pressure sensor 70, the output terminal of described Hydraulic Pump-Motor System 2 is connected with Resistance-load system 6 by friction clutch 61, the torque and rotational speed of output terminal records and passes to testing bench frame control system 1 by output terminal torque sensor 62 and output terminal speed probe 63 respectively, described load pump 66 is connected with load cylinder 64 by loading system three position four-way electromagnetic valve 65, described the second relief valve 67 is in parallel with load pump 66, the force value of large cavity pressure sensor 70 feeds back to the second relief valve 67, little cavity pressure and the large cavity pressure value of the load cylinder 64 that described loculus pressure gauge 68 and large cavity pressure table 69 record pass to testing bench frame control system 1.
Main and the engine speed of the efficiency of Hydraulic Pump-Motor System, hydraulic system discharge capacity are relevant with system pressure, and system pressure is mainly relevant with load.By changing engine speed and load, the relation that Efficiency is associated, and hydraulic system discharge capacity is controlled by testing bench frame control system.
Under rated engine speed, engage magnetic clutch 8, by Resistance-load system 6, set load resistance, making motor load resistance is 50% of rated pressure, by testing bench frame control system 1 Control experiment stand, when system stability, record each sensor test bit.Then load gradually, measure respectively from 50% of rated pressure and respectively organize data to six equal diversion points between rated pressure.
The efficiency of the rotating speed of inputting, exporting by hydraulic system, torque and flow rate calculation hydraulic system.The efficiency that can obtain hydraulic system according to input, the rotating speed of exporting and torque, can obtain the volumetric efficiency of hydraulic system according to the flow of input, output.
Claims (5)
1. the efficiency test stand of a controlled by electro-hydraulic proportional pump motor system, it is characterized in that: comprise testing bench frame control system (1), Hydraulic Pump-Motor System (2), electrohydraulic scale servo system (3), oil-supplementing system (4), cooling system (5), Resistance-load system (6), motor (7), magnetic clutch (8) and raising speed case (9), described motor (7) is connected with raising speed case (9) by magnetic clutch (8), described raising speed case (9) is connected with the input end of Hydraulic Pump-Motor System (2), the output terminal of described Hydraulic Pump-Motor System (2) is connected with Resistance-load system (6), described Hydraulic Pump-Motor System (2) comprises oblique tray type plunger variable displacement pump (21) and fixed displacement motor (22), the swash plate angle that described electrohydraulic scale servo system (3) is controlled oblique tray type plunger variable displacement pump (21) realizes the control to oblique tray type plunger variable displacement pump (21) discharge capacity, described oil-supplementing system (4) is given respectively working connection and electrohydraulic scale servo system (3) the oil circuit control fuel feeding of Hydraulic Pump-Motor System (2), described cooling system (5) is controlled the temperature of whole hydraulic system oil liquid, described testing bench frame control system (1) is controlled the input of power by magnetic clutch (8), described testing bench frame control system (1) is realized the control to oblique tray type plunger variable displacement pump (21) discharge capacity by controlling electrohydraulic scale servo system (3), described testing bench frame control system (1) by measure the rotating speed of Hydraulic Pump-Motor System (2) input end and output terminal and torque calculates respectively Hydraulic Pump-Motor System (2) thus input power and output power obtain the efficiency value of Hydraulic Pump-Motor System (2).
2. the efficiency test stand of controlled by electro-hydraulic proportional pump motor system according to claim 1, it is characterized in that: described oil-supplementing system (4) comprises slippage pump (41), drive motor (42) and the first relief valve (43), described drive motor (42) drives slippage pump (41) work, and it is respectively working connection, electrohydraulic scale servo system (3) oil circuit control fuel feeding and the first relief valve (43) oil sump tank of Hydraulic Pump-Motor System (2) that slippage pump (41) high-voltage oil liquid from fuel tank oil suction flows to.
3. the efficiency test stand of controlled by electro-hydraulic proportional pump motor system according to claim 2, it is characterized in that: described Hydraulic Pump-Motor System (2) also comprises variable displacement pump output terminal flowmeter (23), variable displacement pump delivery guage (24), fixed displacement motor output terminal flowmeter (25), fixed displacement motor delivery guage (26) and fixed displacement motor output end pressure sensor (27), described fixed displacement motor output end pressure sensor (27) feeds back to the force value of fixed displacement motor output terminal the drive motor (42) of oil-supplementing system (4), described variable displacement pump output terminal flowmeter (23), variable displacement pump delivery guage (24), the value that fixed displacement motor output terminal flowmeter (25) and fixed displacement motor delivery guage (26) record passes to testing bench frame control system (1).
4. the efficiency test stand of controlled by electro-hydraulic proportional pump motor system according to claim 2, is characterized in that: described electrohydraulic scale servo system (3) comprises displacement control oil cylinder (31), amplifier (32), servo-system three position four-way electromagnetic valve (33), servo-system pressure transducer (34) and servo-system one-way valve (35); Described servo-system three position four-way electromagnetic valve (33) is controlled the deflection of motion promotion oblique tray type plunger variable displacement pump (21) swash plate of displacement control oil cylinder (31) piston, and described testing bench frame control system (1) is controlled the action of servo-system three position four-way electromagnetic valve (33) by amplifier (32); The pressure of servo-system three position four-way electromagnetic valve (33) is delivered to first relief valve (43) of oil-supplementing system (4) by servo-system pressure transducer (34), by controlling the opening of the first relief valve (43), guarantee the normal operation of electrohydraulic scale servo system (3), servo-system one-way valve (35) stops the backflow of fluid.
5. the efficiency test stand of controlled by electro-hydraulic proportional pump motor system according to claim 1, it is characterized in that: described Resistance-load system (6) comprises friction clutch (61), output terminal torque sensor (62), output terminal speed probe (63), load cylinder (64), loading system three position four-way electromagnetic valve (65), load pump (66), the second relief valve (67), loculus pressure gauge (68), large cavity pressure table (69) and large cavity pressure sensor (70), the output terminal of described Hydraulic Pump-Motor System (2) is connected with Resistance-load system (6) by friction clutch (61), the torque and rotational speed of output terminal records and passes to testing bench frame control system (1) by output terminal torque sensor (62) and output terminal speed probe (63) respectively, described load pump (66) is connected with load cylinder (64) by loading system three position four-way electromagnetic valve (65), described the second relief valve (67) is in parallel with load pump (66), the force value of large cavity pressure sensor (70) feeds back to the second relief valve (67), little cavity pressure and the large cavity pressure value of the load cylinder (64) that described loculus pressure gauge (68) and large cavity pressure table (69) record pass to testing bench frame control system (1).
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| CN104481973A (en) * | 2014-12-19 | 2015-04-01 | 上海电气液压气动有限公司 | Impact performance test system for closed hydraulic pump |
| CN104500506A (en) * | 2014-12-19 | 2015-04-08 | 上海电气液压气动有限公司 | Comprehensive test system for closed type hydraulic pumps |
| CN104500505A (en) * | 2014-12-19 | 2015-04-08 | 上海电气液压气动有限公司 | Impact test system for open hydraulic pump |
| CN105340468A (en) * | 2015-10-22 | 2016-02-24 | 江苏大学 | Electro-hydraulic control system for differential type tracked combine harvester test vehicle and control method thereof |
| CN107246425A (en) * | 2017-07-27 | 2017-10-13 | 上海电气液压气动有限公司 | A kind of hydraulic motor and reductor multi-function test stand |
| CN110242630A (en) * | 2019-06-12 | 2019-09-17 | 农业农村部南京农业机械化研究所 | A kind of hydraulic closed system motor characteristic test testing stand |
| CN112696348A (en) * | 2020-12-25 | 2021-04-23 | 中国船舶重工集团公司第七0三研究所 | Efficiency calibration method for fixed displacement hydraulic pump |
| CN113585151A (en) * | 2021-07-22 | 2021-11-02 | 滁州永强汽车制造有限公司 | Efficient snow throwing vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104481973A (en) * | 2014-12-19 | 2015-04-01 | 上海电气液压气动有限公司 | Impact performance test system for closed hydraulic pump |
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| CN104500505A (en) * | 2014-12-19 | 2015-04-08 | 上海电气液压气动有限公司 | Impact test system for open hydraulic pump |
| CN105340468A (en) * | 2015-10-22 | 2016-02-24 | 江苏大学 | Electro-hydraulic control system for differential type tracked combine harvester test vehicle and control method thereof |
| CN105340468B (en) * | 2015-10-22 | 2017-04-05 | 江苏大学 | A kind of differential speed type crawler-type combine harvester instruction carriage electrohydraulic control system and method |
| CN107246425A (en) * | 2017-07-27 | 2017-10-13 | 上海电气液压气动有限公司 | A kind of hydraulic motor and reductor multi-function test stand |
| CN107246425B (en) * | 2017-07-27 | 2023-08-01 | 上海电气液压气动有限公司 | Comprehensive test stand for hydraulic motor and speed reducer |
| CN110242630A (en) * | 2019-06-12 | 2019-09-17 | 农业农村部南京农业机械化研究所 | A kind of hydraulic closed system motor characteristic test testing stand |
| CN112696348A (en) * | 2020-12-25 | 2021-04-23 | 中国船舶重工集团公司第七0三研究所 | Efficiency calibration method for fixed displacement hydraulic pump |
| CN113585151A (en) * | 2021-07-22 | 2021-11-02 | 滁州永强汽车制造有限公司 | Efficient snow throwing vehicle |
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| CN104196827B (en) | 2016-06-08 |
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