CN102169053A - Hydraulic control loop of high/low-temperature test bed for automatic transmission valve - Google Patents
Hydraulic control loop of high/low-temperature test bed for automatic transmission valve Download PDFInfo
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- CN102169053A CN102169053A CN 201010603929 CN201010603929A CN102169053A CN 102169053 A CN102169053 A CN 102169053A CN 201010603929 CN201010603929 CN 201010603929 CN 201010603929 A CN201010603929 A CN 201010603929A CN 102169053 A CN102169053 A CN 102169053A
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Abstract
The invention discloses a hydraulic control loop of a high/low-temperature test bed for an automatic transmission valve. The system comprises four parts, namely a high-temperature hydraulic oil way, a low-temperature hydraulic oil way, a high/low temperature common oil way, and a measured hydraulic system. In the system, a high/low-temperature hydraulic oil way is divided into two independent systems; the output flow of an oil pump can be adjusted by adjusting the speed of a servo motor; the output pressure of the oil pump can be adjusted by adjusting a proportional valve; and the input flow of a test valve can be stably controlled within a widened range by adjusting speed control valves on a main oil way and a bypass oil way. The high and low-temperature hydraulic oil ways are separated, thereby reducing the demand on the chosen models of parts such as oil pumps, solenoid valves, and the like, and lowering the system cost. In the manner of differentially adjusting the flow by using the speed control valves, the test requirement of controlling a valve in a stable small-flow test condition is simply and reliably realized.
Description
Technical field
The present invention relates to a kind of automatic transmission valve body testing table, and be particularly related to a kind of hydraulic control circuit of automatic transmission valve body thermocycling platform.
Background technology
Core key part as automatic transmission, pilot valve body plays crucial effects to the realization of whole vehicle functions and the raising of performance, it not only influences the rideability and the driver comfort of car load, and to significant impact is all arranged in efficient, reliability and serviceable life of car load.Therefore, extremely important to the test that the function and the performance of pilot valve body are carried out system, this test findings is not only the foundation of improving valve body and solenoid valve design, also is the important foundation of automatic transmission Control Software exploitation.
Automatic transmission valve body working range is very wide, it is bigger that the performance of valve body is influenced by oily temperature, conventional hydraulic system does not often satisfy the performance test needs under the wide temperature condition relatively, so existing valve body performance test is usually carried out under normal temperature or not too high temperature.Authorized among patent of invention ZL200410020321.4 " automatic gearbox of vehicles application valve body testing table " and the utility model patent ZL200420029540.4 " automatic gearbox of vehicles application valve body testing table " and introduced a kind of automatic gearbox of vehicles application valve body testing table, patent documentation shows, system has adopted duplex gear pump, a pump is a movable workbench hydraulic cylinder in the pilot valve body assembling and dissembling process, compress the die head hydraulic cylinder and produce working pressure, and produce the main oil pressure of valve body test by reduction valve, but the reduction valve of this oil circuit can only be realized the decompression control of pressure, can not realize the adjusting to the pilot valve body test flow; Another pump passing ratio pressure regulator valve of system produces the speed governing oil pressure, but in the hydrostatic control valve body of general full electronic automatic transmission, the gearshift strategy generally is the two parameters control based on the throttle and the speed of a motor vehicle, throttle signal and vehicle speed signal are gearbox controller TCU and gather by sensor, TCU judges that by calculating the selected control strategy of basis carries out corresponding gear shift control later on, the throttle signal of this patent is applied to by the throttle valve drive motor and produces the air throttle oil pressure on the operation valve, vehicle speed signal produces corresponding speed governing oil pressure by aforesaid ratio adjusting valve, the speed of a motor vehicle and throttle signal are not the automatically controlled systems of sensor, connect and be applied on the shift valve but convert air throttle oil pressure and governor oil straightening to, judge that thus this system is the automatic transmission system of all-hydraulic control, because be that oil pressure is applied directly on the operation valve, so the gear shift control rule can only realize by the mode of full mechanical-hydraulic; Also find this system temperature control method and imperfect by reading independent right and appurtenance and Fig. 4, this system only adds heat control by control heater, in conjunction with patent specification, the test oil temperature control is at 55 ± 5oC, and the performance of hydraulic system is very responsive to oil temperature parameter, the routine work temperature of hot machine state can reach 90 ~ 120 oC, the extreme working temperature of cold post-start state can be lower than-35 oC, therefore require the test temperature of valve body testing table to be controlled accurately, and require hydraulic system is improved design accordingly in wideer temperature range.
Authorized among the utility model patent ZL 200820190245.5 " automatic gear-box application valve body test-bed " and introduced a kind of automatic gearbox of vehicles application valve body testing table, patent documentation shows, this testing table is with the first variable-frequency motor simulated engine rotating speed and drive oil pump, with second variable-frequency motor simulation speed of a motor vehicle, and convert signals of rotational speed sensor to square-wave signal control two gearshift solenoid valves, as seen this patent does not relate to the hydraulic system of valve body pilot system fully, does not relate to the control of oil temperature; Other adopts two motor speed sensor signals to drive the gearshift solenoid valve, has only the engine speed simulation, do not consider the engine throttle gate signal, do not consider the gear shift control of clutch solenoid valve control and unnecessary two solenoid valves, because except other electric-controlled hydraulics AMT of CVT, all unnecessary two valves of gear shift control of automatic transmission such as DCT, AT, except the gear shift control valve, also should consider the solenoid control of start clutch, converter lockout clutch coupling simultaneously.
In sum,, be necessary to design corresponding high low temperature hydro-test system, to satisfy under the automatic transmission valve body thermocycling condition demand to pressure flow for the automatic transmission valve body being carried out the performance test in full working temperature zone.
Summary of the invention
Hydraulic control circuit when the object of the present invention is to provide a kind of automatic transmission valve body thermocycling detects needs with the test of satisfying full working temperature zone inner control function of automatic transmission valve body and performance.
The technical scheme that the present invention is adopted for achieving the above object is:
A kind of automatic transmission valve body thermocycling platform hydraulic control circuit, it includes independently high temperature hydraulic circuit and low temperature hydraulic oil road, common shared oil circuit of high low temperature and test solution pressing system.
The high temperature hydraulic oil of described high temperature hydraulic circuit is picked out by the high-temperature systems fuel tank, the low temperature hydraulic oil on low temperature hydraulic oil road is picked out by the cryogenic system fuel tank, in high temperature hydraulic circuit and low temperature hydraulic oil road, corresponding motor and oil pump are set respectively, the high-temperature systems adjustable speed motor drives high-temperature systems oil pump control high temperature hydraulic circuit, the cryogenic system oil pump control low temperature hydraulic oil road of cryogenic system adjustable speed motor drive controlling, the output circuit on high temperature hydraulic circuit and low temperature hydraulic oil road carries out the working connection inflow pipeline that the loop isolates and be connected to the shared oil circuit of high low temperature by switching ball separately respectively, and finally is flowed in the working connection of the shared oil circuit of high low temperature.On the working connection of the shared oil circuit of high low temperature main flow speed control valve is installed, the oil outlet end of the shared oil circuit of high low temperature links to each other with the test solution pressing system by the pilot valve body inlet oil duct of test solution pressing system, also pick out working connection accumulator oil line pipe on the working connection of the shared oil circuit of high low temperature, connected accumulator.By the control of high-temperature systems adjustable speed motor in the oil circuit and cryogenic system adjustable speed motor rotating speed, realize simulation to the different input flow rates of tested valve body.
In described high temperature hydraulic circuit and low temperature hydraulic oil road; cross-over connection has thermal-hydraulic system safety overflow valve and ratio pressure to regulate between the output circuit of high-temperature systems oil pump and high temperature oil returning tube; there are low temperature hydraulic system safety overflow valve and ratio pressure to regulate in cross-over connection on the output circuit of cryogenic system oil pump and between the low temperature oil returning tube; under high/low temperature condition, realize protection to hydraulic system; when pilot solenoid valve independently, provide a controlled input pressure to pet valve.
Described hydraulic control circuit also has independently oil return line system, it comprises valve body oil return line and holder food tray oil return line, described valve body oil return line picks out by the oil return opening of pilot valve body oil returning tube from pilot valve body, is connected to high temperature or cryogenic system fuel tank by high temperature oil returning tube and low temperature oil returning tube respectively again; Described holder food tray oil return line picks out from the holder food tray of tested valve body, is connected to high temperature or cryogenic system fuel tank by high temperature oil returning tube and low temperature oil returning tube respectively again; Be furnished with high temperature valve body oil return line solenoid valve and low temperature valve body oil return line solenoid valve on described valve body oil return line respectively, according to the thermocycling requirement, two solenoid valve interlockings control makes oil on the valve body oil return line be back to separately high temperature or cryogenic system fuel tank; On described holder food tray oil return line, be furnished with high temperature holder food tray oil return line solenoid valve and low temperature holder food tray oil return line solenoid valve respectively, according to the thermocycling requirement, two solenoid valve interlockings control makes oil on the holder food tray oil return line be back to separately high or low temperature system fuel tank.
Also designing in the shared oil circuit of described high low temperature has the bypass flow in parallel with working connection to regulate oil circuit, it connects secondary flow speed control valve by switching ball, the oil-out of secondary flow speed control valve is communicated with the test oil returning tube of test solution pressing system, and the flow size realizes by the bypass equal difference overflow mode of main flow speed control valve and secondary flow speed control valve; If the then secondary flow speed control valve of hot test flows back to the high-temperature systems fuel tank by high temperature oil circuit oil return solenoid valve, valve body high temperature oil circuit oil returning tube, high temperature oil returning tube, if the then secondary flow speed control valve of low-temperature test flows back to the cryogenic system fuel tank by low temperature oil circuit oil return solenoid valve, valve body low temperature oil circuit oil returning tube, low temperature oil returning tube; When the off switch ball valve, by the input flow rate of the control of the accumulator on main flow speed control valve and working connection pilot valve body, unnecessary flow passing ratio surplus valve is realized overflow; When opening switching ball, by controlling main flow speed control valve and secondary flow speed control valve, in conjunction with the accumulator on the working connection, also can be under test conditions such as low discharge or low temperature constant rate of given valve body.
By the said structure design as can be known, the low-temperature test pressure-controlled loop of this automatic transmission valve body testing table hydraulic system mainly is made of the oil circuit and the shared oil circuit of high low temperature of two independent controls of high low temperature, wherein adjustable speed motor drives high-temperature systems oil pump control high temperature oil circuit, the cryogenic system oil pump control low temperature oil circuit of adjustable speed motor drive controlling, high low temperature oil return is got back to separately high low temperature system oil case by corresponding oil return solenoid valve, and high temperature oil circuit and low temperature oil circuit are isolated by switching ball and be connected to the shared working connection of high low temperature.Control by adjustable speed motor rotating speed in the oil circuit; can realize simulation to the different input flow rates of valve body; the safety overflow valve and the proportional pressure valve that adapt to high temperature or low temperature are arranged respectively on the high low temperature oil circuit; can under high/low temperature condition, realize protection to hydraulic system; in the time of also can being implemented in independently pilot solenoid valve, provide a controlled input pressure to pet valve.The high temperature oil circuit by control such as temperature elevation system, high-temperature systems fuel tank stirring system and recirculated cooling water road with the oily temperature control of high-temperature systems fuel tank at normal temperature to the setting test temperature between the high-temperature region, the low temperature oil circuit by the control of refrigeration unit and cryogenic system fuel tank oil stirring system with the oily temperature control of cryogenic system fuel tank in the setting test temperature of normal temperature to low-temperature range, in order to ensure the cold control effect of low temperature, suitably strengthen the fuel tank volume, strengthen the freezing power of the assembling unit and reduce the oil pipe delivered length, and increase provision for thermal insulation at positions such as oil pipe, fuel tanks.
In the shared oil circuit of high low temperature, sensors such as pressure, temperature, flow are arranged, in order to be implemented under the extreme operating conditions such as low temperature, low discharge control to valve body or valve input flow rate, two flow speed control valves in working connection, have been adopted, one of them main flow speed control valve is connected in the working connection, and in the back of this main flow speed control valve, system is in parallel with pilot valve body, connect flow speed control valve No. one time by a switching ball, secondary flow speed control valve oil-out oil sump tank.When the off switch ball valve, by the accumulator on main flow speed control valve and the working connection, the input flow rate that can effectively control pilot valve body is constant; When opening switching ball, by controlling main flow speed control valve and secondary flow speed control valve, in conjunction with the accumulator on the working connection, also can be under test conditions such as low discharge or low temperature constant rate of given valve body.
Can connect real clutch coupling, heating radiator even load on the tested valve body, at each clutch pressure of valve body, lubricated, also be connected to sensors such as pressure, temperature, flow on the output circuits such as system cools respectively, so that the serviceability of valve body is detected.
This hydraulic circuit is when flow regulation, when test flow requires greatly, regulate the Oil pump electrical machinery rotating speed, make the oil pump delivery rate greater than required test flow, regulate proportioning valve pressure greater than test pressure, close bypass ball valve and corresponding working connection bleed off circuit, regulate the working connection flow speed control valve, traffic demand when satisfying the valve body test.When test flow requires hour, regulate the Oil pump electrical machinery rotating speed, make the oil pump delivery rate greater than required test flow, regulate proportioning valve pressure greater than test pressure, open bypass ball valve and corresponding working connection bleed off circuit, regulate working connection flow speed control valve and bypass flow speed control valve simultaneously,, satisfy valve body and stablize low discharge when test demand by the mode of differential adjusting.
This hydraulic circuit is when carrying out performance test to valve separately, system provides a pressure stable source, at this moment, regulate the Oil pump electrical machinery rotating speed, make the oil pump delivery rate greater than required test flow, regulate proportioning valve pressure and equal test pressure, close bypass ball valve and corresponding working connection bleed off circuit, simultaneously the working connection flow speed control valve is opened to maximum, increased the throttling valve fictitious load at test solenoid valve load end.By regulating the pressure of proportioning valve, just can be met the pressure of valve body test demand.
Adopt the technical program, with high low temperature oil circuit separately, reduced requirements of type selecting such as oil pump, valve body, reduced system cost, adopt the differential mode of flow speed control valve, the simple and reliable extreme operating condition test demands such as application valve body input low temperature, low discharge that realized easily.
Description of drawings
Fig. 1 is an automatic transmission valve body thermocycling platform structural representation;
Fig. 2 is an automatic transmission valve body thermocycling platform hydrostatic control schematic diagram;
1 is switch board among Fig. 1, and 2 is power supply box, and 3 is test cabin, and 4 is the pilot valve body web joint, 5 mist of oil gatherers, 6 is pilot valve body, 7 is tensimeter, 8 low temperature pallet scavenge pipes, 9 is low temperature oil circuit scavenge pipe, 10b is a cryogenic system fuel tank oil stirrer, 11 is refrigeration unit, and 12 is the cryogenic system fuel tank, and 13 is the low temperature fuel sucking pipe, 14 is the cryogenic system oil pump, and 15 is the cryogenic system servomotor, and 16 is proportional pressure control valve, 17 is the security of system valve, and 18 is main flow speed control valve, and 19 is the high temperature hydraulic power unit.
Numeric suffix a or A are high low-temperature circuit middle part part among Fig. 2, b or B are the low-temperature circuit parts, 20a is the high-temperature systems ball valve of draining the oil, 21 are high-temperature systems fuel tank cooling refrigeratory, 22a is the high-temperature systems tank gauge, 23 is the high-temperature systems fuel tank, 24 is the high-temperature systems fuel tank heater, 25 is butterfly valve, 26 are the oil suction filtrator, 27 is high temperature gear pump, it is high that 28a and 28b are respectively, low temperature hydraulic system fine filter, it is high that 29a and 29b are respectively, low temperature hydraulic system pneumatic ball valve, 30 is the high-temperature systems servomotor, 31 is air cleaner, it is high that 32a and 32b are respectively, cryogenic system oil tank liquid level switch, it is high that 33a and 33b are respectively, cryogenic system fuel tank temperature sensor, 33c is valve body axle system cooling oil circuit temperature sensor, 34 is cooling water valve, 35 is cooling water filter, 37 is the accumulator stop valve, 38 is accumulator, 39 is flowmeter, 41 is pressure transducer, 42 are the bypass ball valve, 43 are bypass time flow speed control valve, 44a and 44b are high, low temperature oil circuit oil return solenoid valve, 44A and 44B are high, low temperature pallet oil return solenoid valve, 45 is hydraulic quick coupler, 46 is that axle is a refrigeratory, 47 is throttling valve, 48 is clutch coupling, 49 are the holder food tray, and 50a and 50b are high low temperature oil circuit motor coupler, and 6 is pilot valve body, 7 is tensimeter, it is high that 10a and 10b are respectively, cryogenic system fuel tank oil stirrer, 12 is the cryogenic system fuel tank, 13 is the low temperature fuel sucking pipe, 14 is the cryogenic system oil pump, 15 is the cryogenic system servomotor, and it is high that 16a and 16b are respectively, it is high that low temperature hydraulic system proportional pressure control valve, 17a and 17b are respectively, low temperature hydraulic system safety valve, 18 is in-line master flow speed control valve, 201 is the high temperature oil flowline, and 202 is low temperature oil flowline, and 203 are bypass flow adjusting pipeline, 204 is valve body high temperature oil circuit oil returning tube, 205 is the working connection inflow pipeline, and 9 is valve body low temperature oil circuit oil returning tube, 206 pilot valve bodies inlet oil duct, 207 is the pilot valve body oil returning tube, 8 is low temperature pallet oil returning tube, and 208 is working connection accumulator oil line pipe, 209 high temperature pallet oil returning tubes, 210 is the high temperature oil returning tube, 211 is the low temperature oil returning tube, and 510 is the high temperature hydraulic circuit, and 520 is the low temperature hydraulic oil road, 500 is the shared oil circuit of high low temperature, and 530 is the test solution pressing system.
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Embodiment
Describe structure of the present invention and concrete working method in detail below in conjunction with accompanying drawing:
Referring to Fig. 1, the high low temperature hydraulic test bench of automatic transmission valve body mainly is made of switch board 1, power supply box 2, test cabin 3, pilot valve body web joint 4, mist of oil gatherer 5, pilot valve body 6, tensimeter 7, low temperature pallet scavenge pipe 8, low temperature oil circuit scavenge pipe 9, cryogenic system fuel tank oil stirrer 10, refrigeration unit 11, cryogenic system fuel tank 12, low temperature fuel sucking pipe 13, cryogenic system oil pump 14, cryogenic system servomotor 15, proportional pressure control valve 16, security of system valve 17, in-line master flow speed control valve 18, high temperature hydraulic power unit 19, worktable 100 etc.Wherein switch board 1 main realization is to the pressure of pilot valve body 6 each control oil channel in the test cabin 3, to height, low temperature hydraulic oil road 510,520 pressure, flow, systems such as temperature and parameter are carried out parameter acquisition and control, power cabinet is mainly concentrated and is placed servomotor 15,30 control power supply, UPS uninterrupted power source and probe power, test cabin 3 is main parts of valve body thermocycling platform, mainly finish installing and fixing and testing to pilot valve body, above integrated pilot valve body web joint 4, mist of oil gatherer 5, pilot valve body 6, tensimeter 7, pallet 49, proportional pressure control valve 16, security of system valve 17, high temperature hydraulic power unit 19 etc., high temperature hydraulic power unit 19 is positioned at the bottom of test cabin 3, mainly comprise the shared oil circuit 500 of high temperature hydraulic circuit 510 and high low temperature, the main control that realizes high temperature hydraulic circuit part.Low temperature hydraulic oil road 520 is positioned at the next door of test cabin 3, mainly comprise formations such as low temperature pallet scavenge pipe 8, low temperature oil circuit scavenge pipe 9, cryogenic system fuel tank oil stirrer 10, refrigeration unit 11, cryogenic system fuel tank 12, low temperature fuel sucking pipe 13, cryogenic system oil pump 14 and cryogenic system servomotor 15, the main control that realizes low temperature hydraulic oil road part.Whole valve body thermocycling platform can satisfy the high low temperature Controllable Temperature of hydraulic system, and the demand that hydraulic system pressure and flow are controlled can be tested the valve body high temperature performance of various automatic transmission.
Referring to Fig. 2, the hydraulic control circuit of automatic transmission valve body thermocycling platform mainly comprises high temperature hydraulic circuit 510, low temperature hydraulic oil road 520, the shared oil circuit 500 of high low temperature and 530 4 major parts of test solution pressing system.
Wherein high temperature hydraulic circuit 510 mainly comprises the high-temperature systems ball valve 20a that drains the oil, high-temperature systems fuel tank cooling refrigeratory 21, high-temperature systems tank gauge 22a, the high-temperature systems fuel tank 23 of double-layer heat insulation, high-temperature systems fuel tank heater 24, butterfly valve 25, oil suction filtrator 26, high temperature gear pump 27, thermal-hydraulic system fine filter 28a, thermal-hydraulic system pneumatic ball valve 29a, high-temperature systems servomotor 30, air cleaner 31, high-temperature systems oil tank liquid level switch 32a, high-temperature systems fuel tank temperature sensor 33a, cooling water valve 34, cooling water filter 35, the oil return of high temperature oil circuit, pallet oil return solenoid valve 44a and 44A, high temperature oil circuit motor coupler 50a, tensimeter 7, thermal-hydraulic system proportional pressure control valve 16a, thermal-hydraulic system safety valve 17a, high temperature oil flowline 201, valve body high temperature oil circuit oil returning tube 204, high temperature pallet oil returning tube 209, high temperature oil returning tube 210 etc.The high-temperature systems ball valve 20a that drains the oil is arranged in the high-temperature systems fuel tank 23, liquid level gauge 22, air cleaner 31, high-temperature systems oil tank liquid level switch 32a, and the cooling cooling system that constitutes by high-temperature systems fuel tank cooling refrigeratory 21, cooling water valve 34, cooling water filter 35, by high-temperature systems fuel tank temperature sensor 33a, the temperature elevation system that high-temperature systems fuel tank heater 24 constitutes, the said system in the high-temperature systems fuel tank 23 has constituted the control to fuel tank inner fluid temperature, liquid level etc.High-temperature systems servomotor 30 drives high temperature gear pump 27 by high temperature oil circuit motor coupler 50a, oil in the high-temperature systems fuel tank 23 is passed through butterfly valve 25, oil suction filtrator 26 sucks high temperature gear pump 27, cross-over connection has thermal-hydraulic system proportional pressure control valve 16a between the endpiece of high temperature gear pump 27 and the high temperature oil returning tube 210, thermal-hydraulic system safety valve 17a, can realize adjusting to high temperature hydraulic circuit 510 output pressures, the pressure oil of high temperature gear pump 27 outputs is regulated through excess pressure, again by thermal-hydraulic system fine filter 28a, thermal-hydraulic system pneumatic ball valve 29a, high temperature oil flowline 201, test-filtration is satisfied in output, the high temperature hydraulic oil of temperature and pressure demand.Finish the hydraulic oil of test, a part enters high temperature pallet oil returning tube 209 by pallet 49 and high temperature pallet oil return solenoid valve 44A, a part enters high temperature oil circuit oil returning tube 204 by high temperature oil circuit oil return solenoid valve 44a, hydraulic oil in the oil returning tube 209 and 204 finally is flowed to high temperature oil returning tube 210, and returns high-temperature systems fuel tank 23.
Low temperature hydraulic oil road 520 is by tensimeter 7, cryogenic system fuel tank oil stirrer 10b, cryogenic system fuel tank temperature sensor 33b, cryogenic system tank gauge 22b, cryogenic system oil tank liquid level switch 32b, cryogenic system fuel tank 12, low temperature fuel sucking pipe 13, cryogenic system oil pump 14, cryogenic system servomotor 15, low temperature hydraulic system proportional pressure control valve 16b, low temperature hydraulic system safety valve 17b, low temperature hydraulic system fine filter 28b, low temperature hydraulic system pneumatic ball valve 29b, low temperature oil circuit oil return solenoid valve 44b, low temperature pallet oil return solenoid valve 44B, low temperature oil circuit motor coupler 50b, low temperature oil flowline 202, valve body low temperature oil circuit oil returning tube 9, low temperature pallet oil returning tube 8, low temperature oil returning tube 211 formations such as grade.Wherein cryogenic system fuel tank 12 is placed in the refrigeration unit system 11, is placed with cryogenic system fuel tank oil stirrer 10b in the cryogenic system fuel tank 12, to guarantee the even cooling of hydraulic oil.Cryogenic system servomotor 15 drives cryogenic system oil pump 14 by low temperature oil circuit motor coupler 50b, hydraulic oil in the cryogenic system fuel tank 12 is sucked cryogenic system oil pump 14, cross-over connection has low temperature hydraulic system proportional pressure control valve 16b and low temperature hydraulic system safety valve 17b between cryogenic system oil pump 14 endpiece and the low temperature oil returning tube 211, can realize adjusting to cryogenic system oil pump 14 top hole pressures, the pressure oil of cryogenic system oil pump 14 outputs is regulated through excess pressure, passing through low temperature hydraulic system fine filter 28b, low temperature hydraulic system pneumatic ball valve 29b, low temperature oil flowline 202, test-filtration is satisfied in output, the low temperature hydraulic oil of temperature and pressure demand.Finish the hydraulic oil of test, a part enters low temperature pallet oil returning tube 8 by pallet 49 and low temperature pallet oil return solenoid valve 44B, a part enters low temperature oil circuit oil returning tube 9 by low temperature oil circuit oil return solenoid valve 44b, hydraulic oil in the oil returning tube 8 and 9 finally is flowed to low temperature oil returning tube 211, and returns cryogenic system fuel tank 12.
The shared oil circuit 500 of high low temperature is regulated pipeline 203, working connection inflow pipeline 205, pilot valve body inlet oil duct 206, pilot valve body oil returning tube 207, working connection accumulator oil line pipe 208 etc. by temperature sensor 33, accumulator stop valve 37, accumulator 38, flowmeter 39, pressure transducer 41, bypass ball valve 42, bypass from flow speed control valve 43, hydraulic quick coupler 45, tensimeter 7, in-line master flow speed control valve 18, bypass flow and is constituted.By high temperature oil flowline 201 and the low temperature oil flowline 202 working connection inflow pipeline 205 that confluxes, enter in-line master flow speed control valve 18, be divided into three the tunnel afterwards, leading up to working connection accumulator oil line pipe 208, accumulator stop valve 37 reaches accumulator 38,37 on-off actions of accumulator stop valve are used to change occasion uses such as accumulator 38; One the tunnel is that bypass flow is regulated oil circuit, regulate pipeline 203 by bypass flow, bypass ball valve 42, the bypass that enters flow regulation shunting usefulness is from flow speed control valve 43, conflux with pilot valve body oil returning tube 207 afterwards, if hot test is then by high temperature oil circuit oil return solenoid valve 44a, valve body high temperature oil circuit oil returning tube 204, high temperature oil returning tube 210 flows back to double-layer heat insulation high-temperature systems fuel tank 23, if low-temperature test is then by low temperature oil circuit oil return solenoid valve 44b, valve body low temperature oil circuit oil returning tube 9, low temperature oil returning tube 211 flows back to cryogenic system fuel tank 12, pressure transducer 41 also is housed on the pilot valve body oil returning tube 207, flowmeter 39, and link to each other with pilot valve body 6 by hydraulic quick coupler 45; Also have one the tunnel to be working connection, flowmeter 39, tensimeter 7, temperature sensor 33, pressure transducer 41 are set on it, link to each other with pilot valve body 6 by pilot valve body inlet oil duct 206, hydraulic quick coupler 45.Pilot valve body 6 flow into the fluid in the holder food tray 49, if hot test, then by high temperature pallet oil return solenoid valve 44A, high temperature pallet oil returning tube 209, high temperature oil returning tube 210 flow back to double-layer heat insulation high-temperature systems fuel tank 23; If low-temperature test, then by low temperature pallet oil return solenoid valve 44B, low temperature pallet oil returning tube 8, low temperature oil returning tube 211 flows back to cryogenic system fuel tank 12.
Test solution pressing system 530 is made up of pilot valve body 6, flowmeter 39, pressure transducer 41, hydraulic quick coupler 45, temperature sensor 33c, refrigeratory 46, throttling valve 47, clutch coupling 48, holder food tray 49 etc.For test consistance and the vehicle-mounted state correspondence that improves pilot valve body 6, the parts refrigeratory 46 that vehicle-mounted state is docked with the valve body oil circuit, clutch coupling 48 grades link to each other with pilot valve body 6 with hydraulic quick coupler 45, with the assignment of traffic throttling pore in the throttling valve 47 simulation lubricant passage waies, and at required test oil circuit interpolation flowmeter 39, pressure transducer 41, sensors such as temperature sensor 33c, the oil that leaks in pilot valve body 6 processs of the test is collected in the holder food tray 49, if hot test, then by high temperature pallet oil return solenoid valve 44A, high temperature pallet oil returning tube 209, high temperature oil returning tube 210 flow back to double-layer heat insulation high-temperature systems fuel tank 23; If low-temperature test, then by low temperature pallet oil return solenoid valve 44B, low temperature pallet oil returning tube 8, low temperature oil returning tube 211 flows back to cryogenic system fuel tank 12.
The test principle of this hydraulic system is:
When carrying out hot test, open thermal-hydraulic system pneumatic ball valve 29a, close low temperature hydraulic system pneumatic ball valve 29b, close low temperature oil circuit oil return solenoid valve 44b simultaneously, low temperature pallet oil return solenoid valve 44B makes high low temperature oil circuit not connected; The system oil temperature is realized by height temperature rise temperature system in the double-layer heat insulation high-temperature systems fuel tank 23, when oily warm on the low side, when needing heating, by temperature sensor 33a, the temperature elevation system that high-temperature systems fuel tank heater 24 constitutes is realized controlled heat temperature raising, when oily warm higher, when needing cooling, open cooling water valve 34, the cooling that chilled water is realized the system oil temperature to high-temperature systems fuel tank cooling refrigeratory 21 by cooling water filter 35.The pressure oil of high temperature gear pump 27 outputs is by thermal-hydraulic system fine filter 28a, thermal-hydraulic system pneumatic ball valve 29a, high temperature oil flowline 201, and the high temperature hydraulic oil of test demand is satisfied in output.When needs carry out routine tests to solenoid valve, test needs system that a stable constant pressure source is provided, high-temperature systems servomotor 30 drives high temperature gear pump 27 by high temperature oil circuit motor coupler 50a, oil in the high-temperature systems fuel tank 23 is passed through butterfly valve 25, oil suction filtrator 26 sucks high temperature gear pump 27, cross-over connection has thermal-hydraulic system proportional pressure control valve 16a between the endpiece of high temperature gear pump 27 and the high temperature oil returning tube 210, thermal-hydraulic system safety valve 17a, by control ratio surplus valve 16a, can realize controlled system's output pressure, open in-line master flow speed control valve 18 fully this moment simultaneously, bypass ball valve 42 is closed, also just closed bypass flow and regulated pipeline 203, pilot system only provides a constant controlled pressure source during pet valve test, can load with throttling valve 47 at the loading section of pet valve, holder food tray 49 is returned on the draining road, and on corresponding loop connection traffic meter 39, temperature sensor 33 and pressure transducer 41.Hydraulic oil in the holder food tray passes through high temperature pallet oil return solenoid valve 44A, high temperature pallet oil returning tube 209, and high temperature oil returning tube 210 flows back to high-temperature systems fuel tank 23; When needs are tested pilot valve body 6, test needs system that a stable constant current source is provided, high-temperature systems servomotor 30 drives high temperature gear pump 27 by high temperature oil circuit motor coupler 50a, oil in the high-temperature systems fuel tank 23 is passed through butterfly valve 25, oil suction filtrator 26 sucks high temperature gear pump 27, cross-over connection has thermal-hydraulic system proportional pressure control valve 16a between the endpiece of high temperature gear pump 27 and the high temperature oil returning tube 210, thermal-hydraulic system safety valve 17a, this moment the adjusting pressure of proportional pressure control valve 16a suitably is higher than the working pressure of pilot valve body 6, regulate the rotating speed of high-temperature systems servomotor 30, make the pilot system delivery rate contain the flow working range of pilot valve body 6, when required tests of simulating flow is big, in-line master flow speed control valve 18 is adjusted to required flow, bypass ball valve 42 is closed, also just close bypass flow and regulated pipeline 203, this moment, system provided a constant traffic sources, by flow speed control valve 18 constant pilot system delivery rates, unnecessary flow passing ratio surplus valve 16a realizes overflow; When required tests of simulating flow hour, stablize constant low discharge in order to obtain one, bypass ball valve 42 is opened, also promptly open bypass flow and regulate pipeline 203, adjusted in concert in-line master's flow speed control valve 18 and bypass are from flow speed control valve 43 simultaneously, reach regime flow until both, and the flow of realizing both differences equals to test required flow, this moment, system provided the high temperature pressure source of valve piece experimental test demand constant current, and the flow size realizes by main flow speed control valve 18 and the bypass bypass equal difference overflow mode from flow speed control valve 43.Finish the hydraulic oil of test, a part enters high temperature pallet oil returning tube 209 by pallet 49 and high temperature pallet oil return solenoid valve 44A, a part enters high temperature oil circuit oil returning tube 204 by high temperature oil circuit oil return solenoid valve 44a, hydraulic oil in the oil returning tube 209 and 204 finally is flowed to high temperature oil returning tube 210, and returns high-temperature systems fuel tank 23.
When carrying out low-temperature test, open low temperature hydraulic system pneumatic ball valve 29b, close thermal-hydraulic system pneumatic ball valve 29a, close high temperature oil circuit oil return solenoid valve 44a simultaneously, high temperature pallet oil return solenoid valve 44A makes high low temperature oil circuit not connected; The system oil temperature is by refrigeration unit 11 control, in order to realize the even refrigeration of fluid, and helps flowing of fluid, increased cryogenic system fuel tank oil stirrer 10 in cryogenic system fuel tank 12.The pressure oil of low temperature gear-type pump 14 outputs is by low temperature hydraulic system fine filter 28b, low temperature hydraulic system pneumatic ball valve 29b, high temperature oil flowline 202, and the low temperature hydraulic oil of test-filtration test demand is satisfied in output.When needs carry out routine tests to solenoid valve, test needs system that a stable constant pressure source is provided, cryogenic system servomotor 15 drives low temperature gear-type pump 14 by low temperature oil circuit motor coupler 50b, oil in the cryogenic system fuel tank 12 is sucked low temperature gear-type pump 14, cross-over connection has low temperature hydraulic system proportional pressure control valve 16b between the endpiece of low temperature gear-type pump 14 and the low temperature oil returning tube 211, low temperature hydraulic system safety valve 17b, by control ratio surplus valve 16b, can realize controlled system's output pressure, open in-line master flow speed control valve 18 fully this moment simultaneously, bypass ball valve 42 is closed, also just close bypass flow and regulated pipeline 203, pilot system only provides a constant controlled pressure source during pet valve test, loading section at pet valve can load with throttling valve 47, and holder food tray 49 is returned on the draining road, and on corresponding loop connection traffic meter 39, temperature sensor 33 and pressure transducer 41.Hydraulic oil in the holder food tray passes through low temperature pallet oil return solenoid valve 44B, low temperature pallet oil returning tube 8, and low temperature oil returning tube 211 flows back to cryogenic system fuel tank 12; When needs are tested pilot valve body 6, test needs system that a stable constant current source is provided, cryogenic system servomotor 15 drives low temperature gear-type pump 14 by low temperature oil circuit motor coupler 50b, oil in the cryogenic system fuel tank 12 is sucked low temperature gear-type pump 14, cross-over connection has low temperature hydraulic system proportional pressure control valve 16b between the endpiece of low temperature gear-type pump 14 and the low temperature oil returning tube 211, low temperature hydraulic system safety valve 17b, this moment the adjusting pressure of proportional pressure control valve 16b suitably is higher than the working pressure of pilot valve body 6, regulate the rotating speed of high-temperature systems servomotor 15, make the pilot system delivery rate contain the flow working range of pilot valve body 6, when required tests of simulating flow is big, in-line master flow speed control valve 18 is adjusted to required flow, bypass ball valve 42 is closed, also just close bypass flow and regulated pipeline 203, this moment, system provided a constant traffic sources, and by flow speed control valve 18 constant pilot system delivery rates, unnecessary flow passing ratio surplus valve 16b realizes overflow; When required tests of simulating flow hour, stablize constant low discharge in order to obtain one, bypass ball valve 42 is opened, also promptly open bypass flow and regulate pipeline 203, adjusted in concert in-line master's flow speed control valve 18 and bypass are from flow speed control valve 43 simultaneously, reach regime flow until both, and the flow of realizing both differences equals to test required flow, this moment, system provided the low-temperature pressure source of valve piece experimental test demand constant current, and the flow size realizes by main flow speed control valve 18 and the bypass bypass equal difference overflow mode from flow speed control valve 43.Finish the hydraulic oil of test, a part enters low temperature pallet oil returning tube 8 by pallet 49 and low temperature pallet oil return solenoid valve 44B, a part enters low temperature oil circuit oil returning tube 9 by low temperature oil circuit oil return solenoid valve 44b, hydraulic oil in the oil returning tube 8 and 9 finally is flowed to low temperature oil returning tube 211, and returns cryogenic system fuel tank 12.
Thermocycling no matter, all by hydraulic quick coupler 45 and pilot valve body inlet oil duct 206, pilot valve body oil returning tube 207 links to each other with pilot valve body, for test consistance and the vehicle-mounted state correspondence that improves pilot valve body 6, the parts refrigeratory 46 that vehicle-mounted state is docked with the valve body oil circuit, clutch coupling 48 grades link to each other with pilot valve body 6 with hydraulic quick coupler 45, with the assignment of traffic throttling pore in the throttling valve 47 simulation lubricant passage waies, and at required test oil circuit interpolation flowmeter 39, pressure transducer 41, temperature sensor 33 sensors such as grade are used to detect the performance in valve piece and loop.The oil that leaks in pilot valve body 6 processs of the test is collected in the holder food tray 49, if hot test, then by high temperature pallet oil return solenoid valve 44A, high temperature pallet oil returning tube 209, high temperature oil returning tube 210 flow back to double-layer heat insulation high-temperature systems fuel tank 23; If low-temperature test, then by low temperature pallet oil return solenoid valve 44B, low temperature pallet oil returning tube 8, low temperature oil returning tube 211 flows back to cryogenic system fuel tank 12.
This hydraulic circuit is owing to high low temperature oil circuit separates, requirements of type selecting such as oil pump, valve body have been reduced, reduced system cost, and adopted the mode of the differential adjusting flow of flow speed control valve, realized that simple and reliablely the operation valve piece is in the test demand of stablizing under the low discharge test condition.
Claims (9)
1. automatic transmission valve body thermocycling platform hydraulic control circuit, it is characterized in that it includes independently high temperature hydraulic circuit (510) and low temperature hydraulic oil road (520), common shared oil circuit of high low temperature (500) and test solution pressing system (530);
The high temperature hydraulic oil of described high temperature hydraulic circuit (510) is picked out by high-temperature systems fuel tank (23), the low temperature hydraulic oil on low temperature hydraulic oil road (520) is picked out by cryogenic system fuel tank (12), in high temperature hydraulic circuit (510) and low temperature hydraulic oil road (520), corresponding motor and oil pump are set respectively, the high-temperature systems adjustable speed motor drives high-temperature systems oil pump (27) control high temperature hydraulic circuit flow, cryogenic system oil pump (14) the control low temperature hydraulic oil road flow of cryogenic system adjustable speed motor drive controlling, the output circuit of high temperature hydraulic circuit (510) and low temperature hydraulic oil road (520) carries out the working connection inflow pipeline (205) that the loop isolates and be connected to the shared oil circuit of high low temperature (500) by switching ball separately respectively, and finally is flowed in the working connection of the shared oil circuit of high low temperature (500); Main flow speed control valve (18) is installed on the working connection of the shared oil circuit of high low temperature (500), the oil outlet end of the shared oil circuit of high low temperature links to each other with test solution pressing system (530) by the pilot valve body oil duct (206) that enters the mouth, also pick out working connection accumulator oil line pipe (208) on the working connection of the shared oil circuit of high low temperature, connected accumulator (38); Described hydraulic control circuit is realized the simulation to the different input flow rates of tested valve body by the control of high-temperature systems adjustable speed motor in the oil circuit and cryogenic system adjustable speed motor rotating speed;
In described high temperature hydraulic circuit (510) and low temperature hydraulic oil road (520); cross-over connection has thermal-hydraulic system safety overflow valve (17a) and proportional pressure valve (16a) between the output circuit of high-temperature systems oil pump (27) and high temperature oil returning tube (210); in cross-over connection on the output circuit of cryogenic system oil pump (14) and between the low temperature oil returning tube (211) low temperature hydraulic system safety overflow valve (17b) and proportional pressure valve (16b) are arranged; under high/low temperature condition, realize protection to hydraulic system pressure; when pilot solenoid valve independently, provide a controlled input pressure to pet valve.
2. automatic transmission valve body thermocycling platform hydraulic control circuit according to claim 1, it is characterized in that, described hydraulic control circuit also has independently oil return line system, it comprises valve body oil return line and holder food tray oil return line, described valve body oil return line picks out by the oil return opening of pilot valve body oil returning tube (207) from test solution pressing system (530), be connected to high temperature or cryogenic system fuel tank (23,12) by high temperature oil returning tube (210) and low temperature oil returning tube (211) respectively again; Described holder food tray oil return line picks out from the holder food tray of test solution pressing system (530), is connected to high temperature or cryogenic system fuel tank (23,12) by high temperature oil returning tube (210) and low temperature oil returning tube (211) respectively again; On described valve body oil return line, be furnished with high temperature valve body oil return line solenoid valve (44a) and low temperature valve body oil return line solenoid valve (44b) respectively, according to the thermocycling requirement, described two solenoid valve interlockings control makes oil on the valve body oil return line be back to separately high temperature or cryogenic system fuel tank; On described holder food tray oil return line, be furnished with high temperature holder food tray oil return line solenoid valve (44A) and low temperature holder food tray oil return line solenoid valve (44B) respectively, according to the thermocycling requirement, described two solenoid valve interlockings control makes oil on the holder food tray oil return line be back to separately high or low temperature system fuel tank.
3. automatic transmission valve body thermocycling platform hydraulic control circuit according to claim 2, it is characterized in that, also designing in the shared oil circuit of described high low temperature has the bypass flow in parallel with working connection to regulate oil circuit, it connects secondary flow speed control valve (43) by switching ball (42), the oil-out of secondary flow speed control valve (43) is communicated with the test oil returning tube (207) of pilot valve body (6), and the flow size realizes by the bypass equal difference overflow mode of main flow speed control valve (18) and secondary flow speed control valve (43); If the then secondary flow speed control valve of hot test (43) flows back to double-layer heat insulation high-temperature systems fuel tank (23) by high temperature oil circuit oil return solenoid valve (44a), valve body high temperature oil circuit oil returning tube (204), high temperature oil returning tube (210), if the then secondary flow speed control valve of low-temperature test (43) flows back to cryogenic system fuel tank (12) by low temperature oil circuit oil return solenoid valve (44b), valve body low temperature oil circuit oil returning tube (9), low temperature oil returning tube (211); When off switch ball valve (42), by the input flow rate of the control test solution pressing system of the accumulator (38) on main flow speed control valve (18) and the working connection (530), unnecessary flow passing ratio surplus valve (16b) is realized overflow; When opening switching ball (42), by controlling main flow speed control valve (18) and secondary flow speed control valve (43), in conjunction with the accumulator on the working connection (38), also can be under test conditions such as low discharge or low temperature constant rate of given valve body.
4. automatic transmission valve body thermocycling platform hydraulic control circuit according to claim 3 is characterized in that, at the preceding accumulator stop valve (37) that also is provided with of described accumulator (38), plays on-off action.
5. according to claim 1,2,3 or 4 described automatic transmission valve body thermocycling platform hydraulic control circuits, it is characterized in that, in the high-temperature systems fuel tank (23) of described high temperature hydraulic circuit, be provided with the ball valve of draining the oil (20a), liquid level gauge (22), air cleaner (31) and high-temperature systems oil tank liquid level switch (32a), and by high-temperature systems fuel tank cooling refrigeratory (21), cooling water valve (34), the cooling cooling system that cooling water filter (35) constitutes, temperature elevation system by high-temperature systems fuel tank temperature sensor (33a) and high-temperature systems fuel tank heater (24) formation, also be provided with high-temperature systems fuel tank stirring system, with the oily temperature control of high-temperature systems fuel tank at normal temperature to the setting test temperature between the high-temperature region;
In the cryogenic system fuel tank (12) on described low temperature hydraulic oil road, be provided with refrigeration unit and cryogenic system fuel tank oil stirring system, with the oily temperature control of cryogenic system fuel tank in the setting test temperature of normal temperature to low-temperature range.
6. automatic transmission valve body thermocycling platform hydraulic control circuit according to claim 5, it is characterized in that, on the pipeline that described main flow speed control valve (18) and pilot valve body inlet oil duct (206) is connected, flowmeter (39) is installed, tensimeter (7), temperature sensor (33) and pressure transducer (41), pressure transducer (41) also is housed on described pilot valve body oil returning tube (207), flowmeter (39), pilot valve body inlet oil duct (206) and pilot valve body oil returning tube (207) all hydraulic quick coupler (45) by separately link to each other with test solution pressing system (530).
7. automatic transmission valve body thermocycling platform hydraulic control circuit according to claim 5, it is characterized in that, described test solution pressing system (530) comprises external various load oil circuits on the pilot valve body (6) of automatic transmission and the valve body, and described load oil circuit comprises that clutch coupling load oil circuit, clutch lubrication oil circuit, axle are the cooling load oil circuit.
8. automatic transmission valve body thermocycling platform hydraulic control circuit according to claim 7, it is characterized in that, be provided with pressure transducer on described each load oil circuit, also be provided with flowmeter and throttling valve on the described clutch lubrication oil circuit, described axle is that the cooling load oil circuit is provided with flowmeter, pressure transducer and temperature sensor.
9. automatic transmission valve body thermocycling platform hydraulic control circuit according to claim 7 is characterized in that described adjustable speed motor is a servomotor, or variable-frequency motor.
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