CN219914860U - Hydraulic torque converter test bed - Google Patents

Abstract

The utility model relates to a hydraulic torque converter test bed which comprises an oil tank, a first oil pumping piece and a hydraulic torque converter which are sequentially communicated, wherein two control pieces are simultaneously communicated with the first oil pumping piece; the pipeline between the two control pieces and the hydraulic torque converter is provided with a cooling component, the cooling component comprises a second oil pumping piece, two oil delivery pipes, two pipeline coolers and two first oil return pipes, the second oil pumping piece is communicated with the oil tank, the two oil delivery pipes are simultaneously communicated with the second oil pumping piece, the two pipeline coolers are respectively correspondingly communicated with the two oil delivery pipes, the two first oil return pipes are respectively correspondingly communicated with the two pipeline coolers, and the two first oil return pipes are both communicated with the oil tank; the two pipeline coolers are respectively and correspondingly arranged on pipelines between the two control pieces and the hydraulic torque converter. The utility model can reduce the possibility of damage to the service life of parts in the hydraulic torque converter caused by the oil with too high oil temperature.

Description

Hydraulic torque converter test bed

Technical Field

The utility model relates to the technical field of control of hydraulic torque converter test tables, in particular to a hydraulic torque converter test table.

Background

The hydraulic torque converter test bed can be used for carrying out performance tests such as a transmission no-load power loss test, a transmission efficiency test, a transmission gear shifting process test, a transmission noise test and the like on an automobile. The hydraulic torque converter test bed is provided with a hydraulic control system, and can control the oil pressure and the oil quantity of the hydraulic torque converter test bed so as to regulate and control parameters such as the rotating speed, the torque and the like of the automobile hydraulic torque converter on the hydraulic torque converter test bed.

The hydraulic control system of the hydraulic torque converter test bed generally comprises an oil tank, a screw pump connected to the oil tank through a pipeline, and two electromagnetic control valves connected to an oil pumping piece through a pipeline, wherein oil outlet pipelines of the two electromagnetic control valves are correspondingly communicated with two oil inlet ends of the hydraulic torque converter test bed respectively. The screw pump pumps hydraulic oil in the oil tank into a pipeline with a hydraulic system, and the two electromagnetic control valves control the oil pressure and the oil quantity which are introduced into the hydraulic torque converter test bed so as to realize the regulation and control of parameters such as the rotating speed, the torque and the like of the automobile hydraulic torque converter on the hydraulic torque converter test bed.

In order to simulate the high-temperature low-pressure working environment of the automobile hydraulic torque converter, the temperature of oil in an oil tank is usually kept at a higher temperature, and after the high-temperature oil in the oil tank is pumped into the hydraulic torque converter by a screw pump, the hydraulic torque converter of the hydraulic torque converter test bed can reach the high-temperature low-pressure working environment. Hydraulic oil is introduced into the automobile hydraulic torque converter and flows out after being compressed, the oil temperature of the hydraulic oil is increased after being compressed, and the service life of parts in the hydraulic torque converter is reduced when the hydraulic oil with the increased oil temperature is recycled into the automobile hydraulic torque converter.

Disclosure of Invention

In order to reduce the possibility of damage to the service life of parts in the hydraulic torque converter caused by oil with overhigh oil temperature, the utility model provides a hydraulic torque converter test bed.

The hydraulic torque converter test bed provided by the utility model adopts the following technical scheme:

the hydraulic torque converter test bed comprises an oil tank, a first oil pumping piece and a hydraulic torque converter which are sequentially communicated, wherein two control pieces are simultaneously communicated with the first oil pumping piece, and the two control pieces are correspondingly communicated with two oil inlet ends of the hydraulic torque converter respectively; the pipeline between the two control pieces and the hydraulic torque converter is provided with a cooling component, the cooling component comprises a second oil pumping piece, two oil delivery pipes, two pipeline coolers and two first oil return pipes, the second oil pumping piece is communicated with an oil tank, the two oil delivery pipes are simultaneously communicated with the second oil pumping piece, the two pipeline coolers are respectively correspondingly communicated with the two oil delivery pipes, the two first oil return pipes are respectively correspondingly communicated with the two pipeline coolers, and the two first oil return pipes are both communicated with the oil tank; the two pipeline coolers are respectively and correspondingly arranged on pipelines between the two control pieces and the hydraulic torque converter.

Through adopting above-mentioned technical scheme, the first pump oil spare pumps the fluid in the oil tank to two control pieces, and two control pieces control the fluid flow that lets in the hydraulic torque converter to realize regulating and controlling parameters such as rotational speed, the moment of torsion of the automobile hydraulic torque converter on the hydraulic torque converter test bench. The second pump oil piece extracts the oil in the oil tank and inputs the oil into the pipeline cooler through the oil delivery pipe, the oil flows out of the hydraulic torque converter and then passes through the pipeline cooler, and the oil with the overhigh temperature exchanges heat with the oil with the lower temperature of the pipeline cooler so as to cool the oil flowing out of the hydraulic torque converter to a set temperature range. After the oil liquid cooled to the set temperature range is recycled and introduced into the automobile hydraulic torque converter, the possibility of damage to the service life of parts in the hydraulic torque converter caused by overhigh oil liquid temperature can be reduced.

Optionally, the second oil pumping piece intercommunication is provided with the circulative cooling pipe, the circulative cooling pipe communicates simultaneously and sets up in the oil tank, the passageway intercommunication of circulative cooling pipe is provided with the cooler, two first oil return pipe communicates simultaneously and sets up in the oil outlet of cooler.

Through adopting above-mentioned technical scheme, the higher fluid of temperature in two first oil return pipes all flows back into the oil tank through the circulative cooling pipe in, and the fluid temperature in the oil tank can rise, and the fluid in the first pump oil spare extraction oil tank flows through in the cooler cooling down again and flows into the oil tank for the fluid in the oil tank can keep in the temperature range of settlement, makes the fluid in the second pump oil spare can constantly extract the oil tank and carries out heat transfer cooling to the fluid that flows out torque converter.

Optionally, the control piece comprises a first proportional servo valve, a second proportional servo valve, a control overflow valve and a second oil return pipe, and the first proportional servo valve is simultaneously communicated with an oil outlet end of the first oil pumping piece and an oil inlet end of the hydraulic torque converter; the second proportional servo valve bypass is arranged on a pipeline between the first proportional servo valve and the hydraulic torque converter, the control overflow valve is simultaneously communicated with the second proportional servo valve, the second oil return pipe is communicated with the control overflow valve, and the second oil return pipes of the control pieces are both communicated with the oil tank.

Through adopting above-mentioned technical scheme, first proportion servo valve is used for controlling the fluid flow who lets in the torque converter, and the second proportion servo valve that the bypass set up is used for accurate control to let in the pressure of the fluid of torque converter for control the fluid pressure in the lower pressure range that the torque converter set for satisfy the operational environment of torque converter low pressure. After the second proportional servo valve releases the redundant oil, the overflow valve enables the redundant oil to flow back into the oil tank, and meanwhile pressure in the hydraulic torque converter can be kept constant.

Optionally, the pipelines between the two first proportional servo valves and the torque converter are respectively provided with a first pressure sensor, and the first pressure sensors are electrically connected with the first proportional servo valves.

Through adopting above-mentioned technical scheme, first pressure sensor carries out real-time supervision to the fluid pressure who lets in torque converter, and first pressure sensor feeds back the signal in first proportion servo valve for first proportion servo valve can in time adjust the oil liquid volume in the pipeline, makes can carry out relatively accurate control to the oil pressure that lets in torque converter.

Optionally, a branch pipe is arranged on the pipeline between the first oil pumping piece and the two control pieces, and an energy accumulator is arranged on the branch pipe.

Through adopting above-mentioned technical scheme, the energy storage ware can absorb the pulse pressure that produces when first pump oil spare pump oil to when reducing the damage degree of pulse pressure to hydraulic system's pipeline and component, can make the fluid pressure who lets in hydraulic torque converter more stable and accurate.

Optionally, the branch pipe is provided with a pressure stabilizer for further stabilizing the oil pressure in the hydraulic system.

Through adopting above-mentioned technical scheme, the pressure stabilizing piece can further make the pressure of fluid in the pipeline keep invariable, can further make the fluid pressure that lets in torque converter more stable and accurate to keep the operational environment of car torque converter low pressure.

Optionally, the steady voltage spare is including the intercommunication setting in second pressure sensor, steady voltage overflow valve and the third back flow of branch pipe, second pressure sensor electricity is connected in steady voltage overflow valve, the third back flow communicates in the branch pipe setting, just the third back flow communicates simultaneously and sets up in the oil tank.

Through adopting above-mentioned technical scheme, the second pressure sensor carries out real-time supervision to the oil pressure of the play oil pipe of first pump oil spare, and when the fluid pressure of detection was too big, the second pressure sensor control steady voltage overflow valve was opened for unnecessary fluid in the branch pipe flows back in the oil tank, with the oil pressure in the reduction hydraulic system pipeline, in order to keep the operational environment of car torque converter low pressure.

Optionally, temperature control members are respectively arranged between the two pipeline coolers and the hydraulic torque converter, and the temperature control members are used for controlling the oil liquid amount in the pipeline coolers.

Through adopting above-mentioned technical scheme, the temperature control piece controls the fluid volume in the pipeline cooler, and the interior fluid of pipeline cooler is more then great to the cooling degree that flows out torque converter, and less then vice versa. The oil liquid amount in the pipeline cooler is regulated, so that the cooling degree of the pipeline cooler to the oil liquid is regulated, and the temperature of the oil liquid can be controlled relatively accurately.

Optionally, the temperature control piece includes second temperature sensor and electromagnetism water valve, electromagnetism water valve electricity is connected in second temperature sensor, two second temperature sensor corresponds the pipeline that sets up respectively between two pipeline coolers and torque converter, two electromagnetism water valve sets up respectively in two oil delivery pipes.

Through adopting above-mentioned technical scheme, second temperature sensor carries out real-time supervision to the fluid temperature that flows out hydraulic torque converter, and second temperature sensor feeds back in electromagnetic water valve with the signal for electromagnetic water valve can be through the fluid flow in the fluid temperature control oil delivery pipe, with the fluid volume in the control pipeline cooler, makes the temperature to fluid carry out relatively accurate control.

In summary, the present utility model includes at least one of the following beneficial technical effects:

1. the second oil pumping piece extracts oil in the oil tank and inputs the oil into the pipeline cooler through the oil conveying pipe, the oil with the over-high temperature exchanges heat with the oil with the lower temperature of the pipeline cooler so as to cool the oil flowing out of the hydraulic torque converter to a set temperature range, and after the cooled oil is circularly introduced into the automobile hydraulic torque converter again, the possibility of damage to the service life of parts in the hydraulic torque converter due to the over-high temperature of the oil can be reduced;

2. the first oil pumping piece extracts oil in the oil tank, flows through the cooler to cool and then flows into the oil tank, so that the oil in the oil tank can be kept in a set temperature range, and the second oil pumping piece can continuously extract the oil in the oil tank to exchange heat and cool the oil flowing out of the hydraulic torque converter;

3. the first pressure sensor feeds back signals to the first proportional servo valve, so that the first proportional servo valve can timely adjust the oil liquid amount in the pipeline, and the oil pressure fed into the hydraulic torque converter can be controlled relatively accurately.

Drawings

FIG. 1 is a system schematic diagram of an embodiment of the present utility model.

FIG. 2 is a schematic system diagram of a torque converter, a cooling assembly, a temperature control member, a first pressure sensor, and a cooler in an embodiment of the utility model.

Fig. 3 is a schematic diagram of a system of manifolds, accumulators and pressure regulators in an embodiment of the present utility model.

Reference numerals: 1. an oil tank; 11. a liquid level thermometer; 12. a second temperature sensor; 13. a liquid level relay; 2. a first oil pumping member; 21. a medium pressure filter; 3. a torque converter; 4. a control member; 41. a first proportional servo valve; 411. a first pressure sensor; 412. a first pressure gauge; 42. a second proportional servo valve; 43. controlling an overflow valve; 44. a second oil return pipe; 45. a first electromagnetic directional valve; 46. a panel filter; 5. a cooling component; 51. a second oil pumping member; 511. a circulating cooling pipe; 512. a cooler; 513. a one-way valve; 514. an oil return filter; 52. an oil delivery pipe; 53. a pipeline cooler; 54. a first oil return pipe; 6. a branch pipe; 61. an accumulator; 62. a voltage stabilizer; 621. a second pressure sensor; 622. a pressure stabilizing overflow valve; 623. a third return line; 624. a stacked pressure reducing valve; 625. a tube throttle valve; 626. a second electromagnetic directional valve; 63. a second pressure gauge; 7. a temperature control member; 71. a first temperature sensor; 72. an electromagnetic water valve; 8. total electromagnetic water valve.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-3.

The embodiment of the utility model discloses a hydraulic control system of a hydraulic torque converter 3 test bed. Referring to fig. 1, the hydraulic oil pump comprises an oil tank 1, a first oil pumping piece 2, a hydraulic torque converter 3, two control pieces 4 and a cooling component 5, wherein the first oil pumping piece 2 is a screw pump, and an oil inlet end of the first oil pumping piece 2 is connected with the oil tank 1 through a pipeline. In order to simulate the high-temperature low-pressure working environment of the automobile hydraulic torque converter 3, the oil in the oil tank 1 is usually about 85 ℃, and the durable limiting temperature of the screw pump is usually 200-250 ℃, so that the screw pump is selected to convey high-temperature oil.

Referring to fig. 1, the control members 4 include a first proportional servo valve 41, a second proportional servo valve 42, a control relief valve 43, and a second oil return pipe 44, and the second oil return pipes 44 of the two control members 4 are fixedly connected to the oil tank 1 and are communicated with the inside of the oil tank 1. The oil inlet end of the first proportional servo valve 41 is connected to the oil outlet end of the first oil pumping member 2 through a pipeline, and the oil outlet end of the first proportional servo valve 41 is connected to the oil inlet end of the torque converter 3 through a pipeline. The line between the first proportional servo valve 41 and the first pumping element 2 is provided with a medium pressure filter 21 for filtering contaminant particles in the oil pumped into the automotive torque converter 3.

Referring to fig. 1, an oil inlet pipe of the second proportional servo valve 42 is connected to a pipe between the first proportional servo valve 41 and the torque converter 3 through a pipe, an oil inlet end of the control relief valve 43 is connected to an oil outlet end of the second proportional servo valve 42 through a pipe, and one end of the second oil return pipe 44 is fixed and communicated to the oil outlet end of the control relief valve 43. The second oil return pipe 44 is provided with a first electromagnetic directional valve 45 in simultaneous communication with the piping between the control relief valve 43 and the second proportional servo valve 42.

Referring to fig. 1, a plate filter 46 is provided between the first and second proportional servo valves 41 and 42, and the plate filter 46 is simultaneously communicated with an oil outlet end of the first proportional servo valve 41 and an oil inlet end of the first proportional servo valve 41.

The first oil pumping piece 2 pumps the oil in the oil tank 1 to the two first proportional servo valves 41, and the two first proportional servo valves 41 control the oil flow which is introduced into the hydraulic torque converter so as to realize the regulation and control of parameters such as the rotating speed, the torque and the like of the automobile hydraulic torque converter 3 on the test bed of the hydraulic torque converter 3.

The bypass-set second proportional servo valve 42 is opened to release the excessive oil to reduce the pressure of the oil fed into the torque converter 3, so that the oil pressure is controlled within a lower pressure range set by the torque converter 3 to meet the low-pressure working environment of the torque converter 3

After the second proportional servo valve 42 releases the surplus oil, the relief valve allows the surplus oil to flow back into the oil tank 1, so that the pressure in the torque converter 3 can be kept constant. When the oil in the hydraulic system pipeline needs to be emptied, the first electromagnetic directional valve 45 is adjusted so that the pipeline between the control overflow valve 43 and the second proportional servo valve 42 is directly communicated with the second return pipe, and the oil in the hydraulic system pipeline can directly flow back into the oil tank 1 through the second oil return pipe 44.

The plate filter 46 filters the oil to remove or prevent the possibility of contamination of the oil in the oil tank 1 by the backflow of contaminant particles in the oil, which may be caused by external intrusion and abrasion, into the oil tank 1.

Referring to fig. 1 and 2, in order to more accurately control the oil pressure fed to the torque converter 3, the lines between the two first proportional servo valves 41 and the torque converter 3 are respectively provided with a first pressure sensor 411, and the first pressure sensor 411 is electrically connected to the first proportional servo valves 41 through a control board. The lines between the two first proportional servo valves 41 and the torque converter 3 are also provided with a first pressure gauge 412, respectively.

The first pressure sensor 411 monitors the oil pressure flowing into the hydraulic torque converter 3 in real time, and the first pressure sensor 411 feeds back a signal to the first proportional servo valve 41, so that the first proportional servo valve 41 can timely adjust the oil volume in a pipeline, and the oil pressure flowing into the hydraulic torque converter 3 can be controlled relatively accurately. The first pressure gauge 412 displays the oil pressure fed into the torque converter 3 in real time, and when the first pressure sensor 411 fails, an operator can check and adjust components such as the first proportional servo valve 41, the second proportional servo valve 42, a pipeline and the like in time according to the pressure value displayed by the first pressure gauge 412.

Referring to fig. 1 and 2, the cooling module 5 includes a second oil pumping member 51, two oil delivery pipes 52, two pipe coolers 53, and two first oil return pipes 54, the second oil pumping member 51 is a screw pump, and an oil inlet end of the second oil pumping member 51 is connected to the oil tank 1 through a pipe. The two oil delivery pipes 52 are fixed and communicated with the oil outlet end of the second oil pumping piece 51.

Referring to fig. 1 and 2, the pipe cooler 53 is provided with an oil inlet and an oil outlet for passing in and out the oil to be cooled, and a feed port and a discharge port for passing in and out the heat exchange oil. The two pipeline coolers 53 are respectively and correspondingly arranged on the pipelines between the two control pieces 4 and the hydraulic torque converter 3, the oil inlet of the pipeline coolers 53 is communicated with the oil outlet of the first proportional servo valve 41, and the oil outlet of the pipeline coolers 53 is communicated with the oil inlet of the hydraulic torque converter 3. The feed inlets of the two pipeline coolers 53 are correspondingly communicated with the two oil delivery pipes 52 respectively, and the two first oil return pipes 54 are correspondingly communicated with the discharge outlets of the two pipeline coolers 53 respectively.

Referring to fig. 1 and 2, the oil outlet end of the first oil pumping unit 2 is fixed and communicated with a circulation cooling pipe 511, and the other end of the circulation cooling pipe 511 is communicated with an oil tank 1. The circulation cooling pipe 511 is provided with the cooler 512, and the cooler 512 is provided with the oil inlet that is used for business turn over to wait to cool down fluid, and oil inlet, the oil-out of cooler 512 all communicate in circulation cooling pipe 511, and the passageway of circulation cooling pipe 511 wears to locate inside the cooler 512, and circulation cooling pipe 511 between cooler 512 and the oil tank 1 is provided with the oil return filter 514. The check valve 513 is arranged between the circulating cooling pipes 511 at the two ends of the cooler 512 in a communicating way, when the cooler 512 is blocked, the oil can directly flow back into the oil tank 1 through the check valve 513, so that the possibility of overlarge pressure drop caused by the blockage of the cooler 512 is reduced.

Referring to fig. 1 and 2, the oil tank 1 is provided with a liquid level thermometer 11, a second temperature sensor 12, and a liquid level relay 13, the liquid level thermometer 11 being electrically connected to the second temperature sensor 12, the second temperature sensor 12 being electrically connected to a cooler 512. The liquid level thermometer 11 detects the liquid level and temperature of the oil in the oil tank 1, so as to feed back to the second temperature sensor 12, and the second temperature sensor 12 controls and adjusts the cooler 512 through the control board, so that the oil in the oil tank 1 can be kept in a set temperature range. The liquid level relay 13 protects the connection circuit between the liquid level thermometer 11 and the second temperature sensor 12, and between the temperature sensor and the cooler 512.

The second oil pumping piece 51 inputs the oil in the oil tank 1 into the pipeline cooler 53 through the oil conveying pipe 52, the oil flows out of the hydraulic torque converter 3 and flows through the pipeline cooler 53, and the oil with the too high temperature exchanges heat with the oil with the lower temperature in the pipeline cooler 53 so as to cool the oil flowing out of the hydraulic torque converter 3 to a set temperature range. After the oil liquid cooled to the set temperature range is recycled and introduced into the automobile hydraulic torque converter 3, the possibility of damage to the service life of parts in the hydraulic torque converter 3 caused by overhigh oil liquid temperature can be reduced.

The higher oil in two first oil return pipes 54 flows back to the oil tank 1 through the circulation cooling pipe 511, the temperature of the oil in the oil tank 1 can rise, the oil after heat exchange flows through the cooler 512 for cooling and then flows into the oil tank 1, the oil in the oil tank 1 can be kept in a set temperature range, and the second oil pumping piece 51 can continuously pump the oil in the oil tank 1 to exchange heat and cool the oil flowing out of the torque converter 3.

Referring to fig. 1 and 2, in order to more accurately control the temperature of the oil flowing out of the torque converter 3, temperature control members 7 are provided between the two pipe coolers 53 and the torque converter 3, respectively. The temperature control member 7 includes a first temperature sensor 71 and an electromagnetic water valve 72, the two first temperature sensors 71 are respectively and fixedly arranged on the pipelines between the two pipeline coolers 53 and the hydraulic torque converter 3, the electromagnetic water valve 72 is electrically connected to the first temperature sensor 71 through a control board, and the two electromagnetic water valves 72 are respectively arranged on the two oil delivery pipes 52. The two oil delivery pipes 52 are jointly communicated and provided with a total electromagnetic water valve 8, the total electromagnetic water valve 8 is communicated and arranged at the oil outlet end of the cooler 512, and the total electromagnetic water valve 8 is used for controlling the oil quantity entering the two oil delivery pipes 52 so as to reduce the load of the two electromagnetic water valves 72.

The degree of cooling of the outflow torque converter 3 is larger when the oil in the pipe cooler 53 is more, and the degree of cooling of the outflow torque converter 3 is smaller when the oil in the pipe cooler 53 is less. The first temperature sensor 71 monitors the temperature of the oil flowing out of the hydraulic torque converter 3 in real time, and the first temperature sensor 71 feeds back signals to the electromagnetic water valve 72, so that the electromagnetic water valve 72 can control the flow of the oil in the oil conveying pipe 52 through the temperature of the oil, and the amount of the oil in the pipeline cooler 53 is regulated, namely the cooling degree of the oil by the pipeline cooler 53 is regulated, so that the temperature of the oil can be controlled relatively accurately.

Referring to fig. 1 and 3, in order to make the pressure of the oil fed to the torque converter 3 more stable and accurate, the piping communication between the first pumping member 2 and the two first proportional servo valves 41 is provided with a branch pipe 6, and the branch pipe 6 is provided with an accumulator 61. The accumulator 61 can absorb the pulse pressure generated when the first oil pumping member 2 pumps oil, so that the damage degree of the pulse pressure to the pipelines and elements of the hydraulic system is reduced, and the oil pressure fed into the hydraulic torque converter 3 can be more stable and accurate.

Referring to fig. 1 and 3, in order to further improve the stability of the pressure of the oil flowing into the torque converter 3, the branch pipe 6 is provided with a pressure stabilizing member 62, the pressure stabilizing member 62 includes a second pressure sensor 621, a pressure stabilizing relief valve 622 and a third return pipe 623, the second pressure sensor 621 is provided to the branch pipe 6, the oil inlet end of the pressure stabilizing relief valve 622 is communicated with the branch pipe 6, the third return pipe 623 is communicated with the oil outlet end of the pressure stabilizing relief valve 622, and the other end of the third return pipe 623 is communicated with the oil tank 1. The second pressure sensor 621 is electrically connected to the pressure stabilizing relief valve 622 through a control board. The branch pipe 6 is also provided with a second pressure gauge 63.

The second pressure sensor 621 monitors the oil pressure of the oil outlet pipeline of the first oil pumping unit 2 in real time, when the detected oil pressure is too high, the second pressure sensor 621 controls the pressure stabilizing overflow valve 622 to be opened, so that redundant oil in the branch pipe 6 flows back into the oil tank 1, the oil pressure in the pipeline of the hydraulic system is reduced, and the oil pressure fed into the hydraulic torque converter 3 is further stable and accurate, so that the low-pressure working environment of the hydraulic torque converter 3 of the automobile is maintained. The second pressure gauge 63 displays the oil pressure of the branch pipe 6 in real time, and when the second pressure sensor 621 fails, an operator can check and adjust the pressure stabilizing relief valve 622 in time according to the pressure value displayed by the second pressure gauge 63.

Referring to fig. 1 and 3, the third return pipe 623 is provided with a stacked pressure reducing valve 624 and a tubular throttle valve 625 in communication, and the stacked pressure reducing valve 624 plays a certain role in non-return in the third return pipe 623, so that damage of the third return pipe 623 and the pressure stabilizing overflow valve 622 caused by water hammer damage can be reduced. The pipe throttle 625 adjusts the flow rate of the oil flowing back to the oil tank 1 in the third return pipe 623 so that the pressure of the oil flowing back to the oil tank 1 is relatively more stable.

Referring to fig. 1 and 3, a second electromagnetic directional valve 626 is provided in communication between the branch pipe 6 and the third return pipe 623, and the second electromagnetic directional valve 626 is provided between the pressure stabilizing relief valve 622 and the accumulator 61. When the oil in the hydraulic system pipeline needs to be emptied, the second electromagnetic directional valve 626 is adjusted so that the branch pipe 6 and the third return pipe 623 are directly communicated, and the oil in the hydraulic system pipeline can flow back into the oil tank 1 directly through the third return pipe.

The implementation principle of the hydraulic control system of the hydraulic torque converter 3 test bed provided by the embodiment of the utility model is as follows: the first oil pumping piece 2 pumps oil in the oil tank 1, and the two first proportional servo valves 41 control the oil flow rate of the hydraulic torque converter so as to realize regulation and control on parameters such as the rotating speed, the torque and the like of the automobile hydraulic torque converter 3 on the test bed of the hydraulic torque converter 3. Excess oil is released through the second proportional servo valve 42 to reduce the pressure of the oil fed to the torque converter 3 so that the oil pressure is controlled within a lower pressure range set by the torque converter 3 to satisfy a low pressure operating environment of the torque converter 3.

The second oil pumping piece 51 inputs the oil in the oil tank 1 into the pipeline cooler 53, the oil flows out of the torque converter 3 and flows through the pipeline cooler 53, and the oil with the too high temperature exchanges heat with the oil with the lower temperature in the pipeline cooler 53 so as to cool the oil flowing out of the torque converter 3 to a set temperature range. After the oil liquid cooled to the set temperature range is recycled and introduced into the automobile hydraulic torque converter 3, the possibility of damage to the service life of parts in the hydraulic torque converter 3 caused by overhigh oil liquid temperature can be reduced.

The oil after heat exchange flows through the cooler 512 to cool down and then flows into the oil tank 1, so that the oil in the oil tank 1 can be kept in a set temperature range, and the second oil pumping piece 51 can continuously pump the oil in the oil tank 1 to exchange heat and cool down the oil flowing out of the torque converter 3.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (9)

1. A torque converter test bench, its characterized in that: the hydraulic torque converter comprises an oil tank (1), a first oil pumping part (2), a hydraulic torque converter (3) and two control pieces (4) which are sequentially communicated, wherein the two control pieces (4) are simultaneously communicated with the first oil pumping part (2), and the two control pieces (4) are respectively correspondingly communicated with two oil inlet ends of the hydraulic torque converter (3); the two pipeline between the control piece (4) and the hydraulic torque converter (3) is provided with a cooling component (5), the cooling component (5) comprises a second oil pumping piece (51), two oil conveying pipes (52), two pipeline coolers (53) and two first oil return pipes (54), the second oil pumping piece (51) is communicated with the oil tank (1), the two oil conveying pipes (52) are simultaneously communicated with the second oil pumping piece (51), the two pipeline coolers (53) are respectively correspondingly communicated with the two oil conveying pipes (52), the two first oil return pipes (54) are respectively correspondingly communicated with the two pipeline coolers (53), and the two first oil return pipes (54) are both communicated with the oil tank (1); the two pipeline coolers (53) are respectively and correspondingly arranged on pipelines between the two control parts (4) and the hydraulic torque converter (3).

2. The torque converter test stand of claim 1, wherein: the second oil pumping piece (51) is communicated with and is provided with a circulating cooling pipe (511), the circulating cooling pipe (511) is simultaneously communicated with and arranged in the oil tank (1), a cooler (512) is arranged in the passage communication of the circulating cooling pipe (511), and the two first oil return pipes (54) are simultaneously communicated with and arranged at the oil outlet end of the cooler (512).

3. The torque converter test stand of claim 1, wherein: the control piece (4) comprises a first proportional servo valve (41), a second proportional servo valve (42), a control overflow valve (43) and a second oil return pipe (44), wherein the first proportional servo valve (41) is simultaneously communicated with an oil outlet end of the first oil pumping piece (2) and an oil inlet end of the hydraulic torque converter (3); the second proportional servo valve (42) bypasses a pipeline arranged between the first proportional servo valve (41) and the hydraulic torque converter (3), the control overflow valve (43) is simultaneously communicated with the second proportional servo valve (42), the second oil return pipe (44) is communicated with the control overflow valve (43), and the second oil return pipes (44) of the two control pieces (4) are both communicated with the oil tank (1).

4. The torque converter test stand of claim 3, wherein: the pipelines between the two first proportional servo valves (41) and the torque converter (3) are respectively provided with a first pressure sensor (411), and the first pressure sensors (411) are electrically connected with the first proportional servo valves (41).

5. The torque converter test stand of claim 1, wherein: the pipeline between the first oil pumping piece (2) and the two control pieces (4) is provided with a branch pipe (6), and the branch pipe (6) is provided with an energy accumulator (61).

6. The torque converter test stand of claim 5, wherein: the branch pipe (6) is provided with a pressure stabilizing member (62), and the pressure stabilizing member (62) is used for further stabilizing the oil pressure in the hydraulic system.

7. The torque converter test stand of claim 6, wherein: the pressure stabilizing piece (62) comprises a second pressure sensor (621), a pressure stabilizing overflow valve (622) and a third return pipe (623) which are arranged on the branch pipe (6) in a communicating mode, the second pressure sensor (621) is electrically connected to the pressure stabilizing overflow valve (622), the third return pipe (623) is communicated with the branch pipe (6) to be arranged, and the third return pipe (623) is simultaneously communicated with the oil tank (1).

8. The torque converter test stand of claim 1, wherein: a temperature control piece (7) is arranged between the two pipeline coolers (53) and the hydraulic torque converter (3), and the temperature control piece (7) is used for controlling the oil liquid amount in the pipeline coolers (53).

9. The torque converter test stand of claim 8, wherein: the temperature control piece (7) comprises a first temperature sensor (71) and an electromagnetic water valve (72), the electromagnetic water valve (72) is electrically connected to the first temperature sensor (71), two first temperature sensors (71) are respectively and correspondingly arranged on pipelines between the two pipeline coolers (53) and the hydraulic torque converter (3), and two electromagnetic water valves (72) are respectively arranged on the two oil conveying pipelines (52).