Be used to detect the control system of gearbox oil temperature
Technical field
The utility model relates to a kind of control system that detects transmission performance, relates in particular to a kind ofly to come the control system that is used to detect gearbox oil temperature that the serviceability of variator and structural stability etc. are detected by regulating oily temperature.
Background technology
Variator is widely used in vehicle, lathe and other need on the machine of speed change.The oily temperature of transmission fluid pressing system generally be controlled at 50~80 ℃ more satisfactory, this moment fluid viscosity, lubricity and wearing quality be in optimum condition, systems communicate efficient is also the highest.But fluid can cause the certain energy loss inevitably in the process of NE BY ENERGY TRANSFER, cause the system oil temperature rise.The variator working oil temperature is too high to be a kind of common faults, and the variator rotating speed slows down when this fault occurring, even can not walk; Along with the continuous rising of oil temperature, quickened the oxidation of fluid, oil viscosity can constantly descend, leaking gradually increases, and has lost greasy property, and the oil film of each lubricant housings is destroyed, cause seal to damage, the aggravation parts wear, thus further accelerated the speed that oily temperature rises; And along with the hydraulic oil oxidation is accelerated, fluid can go bad, and the too high seals such as rubber, nylon that can also make of temperature lost efficacy because of aging, had not only caused economic loss, even also can influence the normal operation of machine.
Therefore, must when variator dispatches from the factory, carry out the Performance Detection under the different oily temperature environment, have stable, good comprehensive performances to guarantee variator.
The utility model content
At above-mentioned weak point, the utility model provides a kind of control system that is used to detect gearbox oil temperature, and this control system can provide different oily temperature environment to variator, so that variator heatproof, withstand voltage and stability detect.
The control system that the utility model provides is used to detect gearbox oil temperature comprises oil pump, well heater, refrigeratory and three-way control valve; Described well heater and refrigeratory parallel connection, the oil-in of parallel pipeline is communicated with the oil pump oil-out, and the oil-out of parallel pipeline is communicated with the oil-in of three-way control valve; The oil-out of described three-way control valve and the oil-in of oil pump are communicated with the oil-in and the oil-out of variator to be detected respectively.
Further, also comprise the temperature sensor II between the oil-in of temperature sensor I, the oil-out that is arranged on well heater and three-way control valve between the oil-in of the oil-out that is arranged on three-way control valve and oil pump and the controller of control heater size of current and refrigeratory refrigerating capacity, the signal output part access controller of described temperature sensor I and temperature sensor II;
Further, also comprise filtrator, described filtrator is arranged on the oil-out end of oil pump;
Further, also comprise tensimeter, throttling valve and surplus valve, described throttling valve and surplus valve parallel connection, the oil-in of parallel pipeline is communicated with the oil-out of variator to be detected, the oil-out of parallel pipeline is communicated with manometric oil-in, and described manometric oil-out is communicated with the oil-in of oil pump;
Further, also comprise service tank, two position three way directional control valve and four-way, the oil-in of described service tank is communicated with an oil-out of two position three way directional control valve, another oil-out of two position three way directional control valve is communicated with the oil-out of service tank and the oil-in of well heater and refrigeratory respectively by four-way, and the oil-in of two position three way directional control valve is communicated with the oil-out of filtrator.
The beneficial effects of the utility model are: the control system that being used to of the utility model structure detected gearbox oil temperature adopts the oil-in at variator to be detected that well heater and refrigeratory in parallel are set, control the temperature that enters variator fluid by well heater and refrigeratory, to reach the oil liquid temperature under simulation Various Seasonal, the varying environment, and set different oil liquid temperature values as required, variator is effectively detected before dispatching from the factory, have stable, good comprehensive performances to guarantee variator; Can also in time feed back simultaneously every running parameter of variator under the different oil tender feeling conditions, be convenient to do further improvement; Total system is simple in structure, and is easy to operate, is skillfully constructed, and practicality is stronger.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
Among the figure, 1-oil pump 2-well heater 3-refrigeratory 4-three-way control valve 5-variator 7-heating cabinet 8-temperature sensor II 9-filtrator 10-two position three way directional control valve 11-service tank 12-four-way 13-throttling valve 14-surplus valve 16-pressure 17-temperature sensor I 18-gate valve
Embodiment
Accompanying drawing is a structural representation of the present utility model, as shown in the figure: the control system that is used to test gearbox oil temperature comprises oil pump 1, well heater 2, refrigeratory 3, three-way control valve 4 and circulation line, and the three-way control valve 4 of present embodiment adopts the threeway solenoid valves; Wherein, well heater 2 and refrigeratory 3 parallel connections, the oil-in of parallel pipeline is communicated with by the oil-out of oil pipe with oil pump 1, and the oil-out of parallel pipeline is communicated with by the oil-in of oil pipe with three-way control valve 4; The oil-in of the oil-out of described three-way control valve 4 and oil pump 1 is communicated with the oil-in and the oil-out of variator to be detected by oil pipe respectively.
In the present embodiment, on the oil pipe between the oil-out of three-way control valve 4 and the oil-in of variator to be detected temperature sensor I 17 is set, temperature sensor II 8 is set on the oil pipe between the oil-in of the oil-out of well heater 2 and three-way control valve 4, the signal output part access controller of temperature sensor I 17 and temperature sensor II 8 is by the size of current of controller control heater 2 and the refrigerating capacity of refrigeratory 3.When the serviceability of a certain fixed temperature detection variator, heater 2 and refrigeratory 3 are regulated temperature, temperature sensor II 8 detects the output oil temperature of well heater 2, temperature sensor I 17 detects the oil temperature that enters variator to be detected, and the oil temperature signal input controller that detects, regulate the size of current of well heater 2 and the refrigerating capacity of refrigeratory 3 by controller, make its oily temperature that enters variator to be detected be stabilized in required temperature.By setting different oil liquid temperatures on the controller to reach the oil liquid temperature under simulation Various Seasonal, the varying environment.The well heater 2 of present embodiment is a resistance wire, and resistance wire is installed in the heating cabinet 7, can carry out heated sealed to fluid by heating cabinet 7.
In the present embodiment, the oil-out end of oil pump 1 is provided with filtrator 9, fluid by oil pump 1 enters in the filtrator 9, the impurity that makes fluid is through filtering, to improve the degree of purity of fluid, avoid the fluid passage of impurity obstruction well heater 2, refrigeratory 3, variator 5 and various valve bodies in the fluid.
Present embodiment adopts tensimeter 16, throttling valve 13 and surplus valve 14, throttling valve 13 and surplus valve 14 parallel connections, the oil-in of parallel pipeline is communicated with the oil-out of variator to be detected, the oil-out of parallel pipeline is communicated with the oil-in of tensimeter 16, and the oil-out of tensimeter 16 is communicated with the oil-in of oil pump 1.Throttling valve 13 and surplus valve 14 can be regulated according to the pressure size that tensimeter 16 shows, so that the pressure of control total system inner fluid.
Present embodiment also adopts service tank 11, two position three way directional control valve 10 and four-way 12, the oil-in of service tank 11 is communicated with an oil-out of two position three way directional control valve 10, another oil-out of two position three way directional control valve 10 is communicated with the oil-out of service tank 11 and the oil-in of well heater 2 and refrigeratory 3 respectively by four-way 12, and the oil-in of two position three way directional control valve 10 is communicated with the oil-out of filtrator 9.Oil in the The whole control loop can be stored in the service tank 11 in advance, when needs detect speed reduction unit 5, can open the gate valve 18 that is provided with on service tank 11 oil-outs, to the total system fuel feeding; Oil unnecessary in the system can flow back in the service tank 11 by an oil-out of two position three way directional control valve 10 again.
Concrete principle of work is as follows:
During work, open gate valve 18, to the total system fuel feeding.Oil pump 1 operation is input to filtrator 9 with fluid, filters back fluid through filter 9 and is imported into two position three way directional control valve 10, and two position three way directional control valve 10 is selected output interface according to pressure demand; Excessive or when temporarily not needing to the variator fuel feeding, the oil-out that two position three way directional control valve 10 connects service tanks 11 is opened when the fluid amount, fluid enters in the service tank 11; When the oil mass of oil pump output hour, the fluid that is stored in the service tank 11 can replenish, and opens the gate valve 18 that service tank 11 oil-outs are provided with, and just can be the variator fuel feeding.Under the normal condition, the oil-out of two position three way directional control valve 10 is communicated with the oil-in of four-way 12, fluid is input to well heater 2 and refrigeratory 3 by four-way 12, enter three-way control valve 4 behind heater via 2 and refrigeratory 3 alternating temperatures, three-way control valve 4 oily temperature as required can select to open different interfaces; After fluid enters well heater 2 and refrigeratory 3, can detect the oil temperature that enters variator to be detected by temperature sensor II 8 and temperature sensor I 17, and the oil temperature signal input controller that detects, regulate the size of current of well heater 2 and the refrigerating capacity of refrigeratory 3 by controller, adjustment behind desirable value, is carried out performance test to variator again.
Be the various actual conditions under simulation Various Seasonal, the varying environment, the oily temperature that is input to variator is arranged between 20-150 ℃, when the different oil temperature of input, detects the serviceabilitys such as rotating speed, torque of variator respectively, and the record correlation parameter.
Fluid is back to the oil-in of oil pump 1 again through throttling valve 13 and surplus valve 14, for recycling after the output of the oil-out of variator.When output fluid amount was big, surplus valve 14 can play a protective role to throttling valve 13, and can adjust the flow size of throttling valve 13 and surplus valve 14 according to the value of tensimeter 16 respectively.
Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the aim and the scope of the technical program, it all should be encompassed in the middle of the claim scope of the present utility model.