CN218882981U - Hydraulic transmission case control system with hydraulic braking function - Google Patents
Hydraulic transmission case control system with hydraulic braking function Download PDFInfo
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- CN218882981U CN218882981U CN202223587771.4U CN202223587771U CN218882981U CN 218882981 U CN218882981 U CN 218882981U CN 202223587771 U CN202223587771 U CN 202223587771U CN 218882981 U CN218882981 U CN 218882981U
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Abstract
The utility model discloses a hydraulic transmission case control system with hydraulic braking function, wherein, the monitoring unit comprises an input rotation speed sensor, an output rotation speed sensor, two groups of position sensors and a hydraulic brake cavity temperature sensor; the controller is electrically connected with the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve; the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve share an oil inlet a of control oil; the third electromagnetic valve and the fourth electromagnetic valve are both connected with the operation condition control unit; the first electromagnetic valve and the second electromagnetic valve are both connected with the reversing control unit; the fifth electromagnetic valve is connected with the hydraulic braking working condition unit; the utility model integrates the controller on the hydraulic transmission case to control the operation condition control unit, the reversing control unit and the hydraulic braking condition control unit; the integrated level is high, and the reliability is good, and control is steady, and is shock-resistant, and life is longer.
Description
Technical Field
The utility model relates to a hydraulic transmission case technical field especially relates to a take hydraulic transmission case control system of hydraulic braking function.
Background
The hydraulic transmission case control system plays a role in commanding and monitoring the whole transmission case. At present, a hydraulic transmission case is controlled by a locomotive control system, when a locomotive starts to run, a vehicle-mounted PC sends a command to operate a corresponding electric idle valve of the transmission case to act, control wind in the electric idle valve controls a torque converter control valve I of the transmission case to act, oil from a transmission case oil supply pump enters the transmission case to realize oil filling, the locomotive realizes a gear I running working condition, when the locomotive speed is gradually increased and reaches a gear shifting point, the vehicle-mounted PC sends a command to operate the corresponding electric idle valve of the transmission case to act, the control wind in the electric idle valve controls a torque converter control valve II of the transmission case to act, oil from the transmission case oil supply pump enters the transmission case to realize oil filling, and the locomotive realizes a gear II running working condition. The hydraulic transmission case control system occupies the layout space of the locomotive. And compared with a liquid medium, the control is not stable enough and the impact is larger by adopting the control wind as the medium.
Disclosure of Invention
The utility model provides a take hydraulic transmission case control system of hydraulic braking function to overcome above-mentioned technical problem.
In order to realize the purpose, the technical scheme of the utility model is that:
a hydraulic transmission case control system with a hydraulic braking function comprises a controller, an operation condition control unit, a reversing control unit, a hydraulic braking condition control unit, an oil supply control unit, a monitoring unit, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve and a fifth electromagnetic valve;
the monitoring unit comprises an input rotating speed sensor, an output rotating speed sensor, two groups of position sensors and a hydraulic brake cavity temperature sensor;
the input rotating speed sensor is arranged at the input end of the hydraulic transmission case;
the output rotating speed sensor is arranged at the output end of the hydraulic transmission case; the two groups of position sensors are arranged on two sides of the reversing mechanism; the hydraulic brake cavity temperature sensor is arranged at the oil outlet end of the hydraulic brake;
the rotating speed sensor, the output rotating speed sensor, the two groups of position sensors and the hydraulic brake cavity temperature sensor are all electrically connected with the controller;
the controller is electrically connected with the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve; the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve share an oil inlet a of control oil;
the third electromagnetic valve and the fourth electromagnetic valve are connected with the operation condition control unit;
the first electromagnetic valve and the second electromagnetic valve are both connected with the reversing control unit;
the fifth electromagnetic valve is connected with the hydraulic braking working condition unit;
the oil supply control unit is respectively connected with the controller, the operation working condition control unit, the reversing control unit and the hydraulic braking working condition control unit.
Further, the device also comprises a cooling unit;
and the cooling unit is connected with the operation working condition control unit, the hydraulic braking working condition control unit and the oil supply control unit.
Further, the operating condition control unit comprises a first control valve, a fluid coupling and a hydraulic torque converter, wherein the first control valve comprises a first transmission oil inlet a1, a second transmission oil inlet a2, a first transmission oil outlet b1, a second transmission oil outlet b2, a first control oil inlet c1 and a second control oil inlet c2; the first transmission oil inlet a1 is connected with an outlet of the cooling unit; the second transmission oil inlet a2 and the second transmission oil outlet b2 are both connected with the hydraulic torque converter; the first transmission oil outlet b1 is connected with the hydraulic coupler; the first control oil inlet c1 is connected with an oil outlet of the third electromagnetic valve; and the second control oil inlet c2 is connected with an oil outlet of the fourth electromagnetic valve.
Further, the reversing control unit comprises a reversing mechanism, and the reversing mechanism comprises a third control oil inlet c3 and a fourth control oil inlet c4;
the third control oil inlet c3 is connected with an oil outlet of the first electromagnetic valve;
and the fourth control oil inlet c4 is connected with an oil outlet of the second electromagnetic valve.
Further, the hydraulic brake working condition unit comprises a hydraulic brake and a second control valve; the second control valve includes a third transmission oil inlet a3, a fourth transmission oil inlet a4, a third transmission oil outlet b3, a fourth transmission oil outlet b4, and a fifth control oil inlet c5;
the fifth control oil inlet c5 is connected with an oil outlet of the fifth electromagnetic valve; the third transmission oil inlet a3 is connected with an outlet of the cooling unit; the fourth transmission oil inlet a4 is connected with an oil outlet of the hydraulic brake; the third transmission oil outlet b3 is connected with an oil inlet of the hydraulic brake; the fourth transmission oil outlet b4 is connected with an inlet of the cooling unit.
Furthermore, the oil supply control unit comprises an oil pool, an oil supply pump, an overflow valve, a control pump and a pressure regulating valve; the outlet of the oil pool is connected with the oil supply pump; the outlet of the oil supply pump is connected with the inlet of the overflow valve; the outlet of the overflow valve is connected with the inlet of the oil supply pump; the outlet of the oil supply pump is also connected with the inlet of the cooling unit; the inlet of the control pump is connected with the outlet of the cooling unit; the outlet of the control pump is connected with the pressure regulating valve; the pressure regulating valve is connected with an oil inlet a of the control oil; the outlet of the control pump is also connected with the overflow valve;
the oil supply control unit further comprises a filtering unit; the filtering unit comprises a coarse filter, a fine filter and an idle pump coarse filter;
two ends of the coarse filter are respectively connected with the oil pool and the oil supply pump;
two ends of the fine filter are respectively connected with the control pump and the pressure regulating valve;
two ends of the idling pump coarse filter are respectively connected with an idling pump so as to convey lubricating oil to the hydraulic transmission box;
further, the coasting pump is a bidirectional cycloid pump.
Has the advantages that: the utility model discloses a hydraulic transmission case control system with hydraulic braking function, through the integrated setting controller on hydraulic transmission case, acquire the signal of input speed sensor, output speed sensor, position sensor, hydraulic brake chamber temperature sensor, control operation condition control unit, switching-over control unit, hydraulic braking operating mode control unit; the integrated level is high, and the reliability is good, and control is steady, and is shock-resistant, and life is longer.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic view of a hydraulic transmission case control system of the present invention;
fig. 2 is a graph showing the change of the proportional valve current and the oil charge in the brake cavity in the embodiment of the present invention;
fig. 3 is a schematic diagram of a transmission shift point curve in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The embodiment provides a hydraulic transmission case control system with a hydraulic braking function, which comprises a controller 14, an operation condition control unit, a reversing control unit, a hydraulic braking condition control unit, an oil supply control unit and a monitoring unit, as shown in fig. 1; a first solenoid valve 15, a second solenoid valve 16, a third solenoid valve 17, a fourth solenoid valve 18, and a fifth solenoid valve 19;
the monitoring unit comprises an input rotating speed sensor 22, an output rotating speed sensor 13, two groups of position sensors 21 and a hydraulic brake cavity temperature sensor 24;
the input rotating speed sensor 22 is arranged at the input end of the hydraulic transmission case and is used for acquiring an input rotating speed signal of the hydraulic transmission case;
the output rotating speed sensor 13 is arranged at the output end of the hydraulic transmission case; the hydraulic transmission box is used for acquiring an output rotating speed signal of the hydraulic transmission box;
the position sensors 21 are arranged on two sides of the reversing mechanism 20 and used for acquiring reversing position signals of the reversing mechanism 20;
the hydraulic brake cavity temperature sensor 24 is arranged at the oil outlet end of the hydraulic brake 23 and is used for acquiring a cavity temperature signal of the hydraulic brake 23;
the rotating speed sensor 22, the output rotating speed sensor 13, the two groups of position sensors 21 and the hydraulic brake cavity temperature sensor 24 are all electrically connected with the controller 14;
the controller 14 is electrically connected with the first solenoid valve 15, the second solenoid valve 16, the third solenoid valve 17, the fourth solenoid valve 18 and the fifth solenoid valve 19; the first electromagnetic valve 15, the second electromagnetic valve 16, the third electromagnetic valve 17, the fourth electromagnetic valve 18 and the fifth electromagnetic valve 19 share an oil inlet a of control oil;
the controller 14 is used for receiving an input rotating speed signal of the hydraulic transmission case, an output rotating speed signal of the hydraulic transmission case, a reversing position signal of the reversing mechanism and a cavity temperature signal of the hydraulic brake, and controlling the first electromagnetic valve 15, the second electromagnetic valve 16, the third electromagnetic valve 17, the fourth electromagnetic valve 18 and the fifth electromagnetic valve 19 according to a hydraulic braking instruction sent by a locomotive control system, so that the requirements of operation, reversing, gear shifting and hydraulic braking of the transmission case are met; the first electromagnetic valve 15, the second electromagnetic valve 16, the third electromagnetic valve 17, the fourth electromagnetic valve 18 and the fifth electromagnetic valve 19 share an oil inlet a of control oil;
specifically, the third electromagnetic valve 17 and the fourth electromagnetic valve 18 are both connected with the operation condition control unit; the first electromagnetic valve 15 and the second electromagnetic valve 16 are both connected with the reversing control unit;
the fifth electromagnetic valve 19 is connected with the hydraulic braking working condition unit;
the oil supply control unit is respectively connected with the controller 14, the operation condition control unit, the reversing control unit and the hydraulic braking condition control unit.
Specifically, in the present embodiment, the first electromagnetic valve 15, the second electromagnetic valve 16, the third electromagnetic valve 17, the fourth electromagnetic valve 18, the fifth electromagnetic valve 19, the proportional valve 3, the input rotation speed sensor 22, the output rotation speed sensor 13, the position sensor 21, and the hydrodynamic brake cavity temperature sensor 24 are all electrically connected to the controller 14; the first electromagnetic valve 15, the second electromagnetic valve 16, the third electromagnetic valve 17, the fourth electromagnetic valve 18 and the fifth electromagnetic valve 19 are two-position three-way valves and are used for opening an outlet of control oil, the two three-way valves share one oil inlet a, when the controller 14 does not send an electric signal, namely a control command, to the first electromagnetic valve 15, the second electromagnetic valve 16, the third electromagnetic valve 17, the fourth electromagnetic valve 18 and the fifth electromagnetic valve 19, an oil outlet of the first electromagnetic valve 15, an oil outlet of the second electromagnetic valve 16, an oil outlet of the third electromagnetic valve 17, an oil outlet of the fourth electromagnetic valve 18 and an oil outlet of the fifth electromagnetic valve 19 are all closed, and the electric signal can only control the opening of the oil outlet of a single electromagnetic valve.
The operation condition control unit is used for controlling the hydraulic torque converter 12 and the hydraulic coupler 10 through the third electromagnetic valve 17 and the fourth electromagnetic valve 18 according to an input rotating speed signal of the hydraulic transmission case and an output rotating speed signal of the hydraulic transmission case; according to the input rotating speed signal of the hydraulic transmission case, the output rotating speed signal of the hydraulic transmission case and the operating condition control logic, the operating condition control unit is controlled through the third electromagnetic valve 17 and the fourth electromagnetic valve 18, so that oil discharge of the hydraulic torque converter 12 and oil charging operation of the hydraulic coupler 10 are realized;
preferably, the operation condition control unit includes a first control valve 11, and the first control valve 11 includes a first transmission oil inlet a1, a second transmission oil inlet a2, a first transmission oil outlet b1, a second transmission oil outlet b2, a first control oil inlet c1, and a second control oil inlet c2; the first transmission oil inlet a1 is connected with an outlet of the cooling unit 5; the second transmission oil inlet a2 and the second transmission oil outlet b2 are both connected with the torque converter 12; the first transmission oil outlet b1 is connected with the fluid coupling 10; the first control oil inlet c1 is connected with an oil outlet of the third electromagnetic valve 17; the second control oil inlet c2 is connected with an oil outlet of the fourth electromagnetic valve 18;
the reversing control unit is used for controlling the reversing mechanism 20 through the first electromagnetic valve 15 and the second electromagnetic valve 16 according to a reversing position signal of the reversing mechanism; according to the reversing position signal and the reversing control logic of the reversing mechanism, the reversing control unit is controlled by the first electromagnetic valve 15 and the second electromagnetic valve 16, so that the reversing operation of the reversing mechanism 20 is realized;
preferably, the direction change mechanism 20 includes a third control oil inlet c3 and a fourth control oil inlet c4;
the third control oil inlet c3 is connected with an oil outlet of the first electromagnetic valve 15;
the fourth control oil inlet c4 is connected with an oil outlet of the second electromagnetic valve 16;
specifically, in the present embodiment, the natural state of the reversing mechanism 20 is the a direction, and the internal and external splines are in the engaged state. When the direction needs to be changed, the hydraulic control oil pushes the spline shaft to be disconnected with the currently meshed internal spline and then meshed with the other internal spline, and the output direction is switched to the direction B. Wherein, the direction A represents that the output rotation direction of the hydraulic transmission case is consistent with the input rotation direction; the direction B indicates that the direction of rotation of the transmission output is opposite to the direction of rotation of the input.
The hydraulic brake working condition unit is used for controlling the hydraulic brake 23 through the fifth electromagnetic valve 19 according to a hydraulic brake instruction sent by a locomotive control system and the cavity temperature of the hydraulic brake; according to the cavity temperature signal and the hydraulic brake control logic of the hydraulic brake, the hydraulic brake working condition unit is controlled through the fifth electromagnetic valve 19, and oil charging/discharging operation of the hydraulic brake 23 is realized;
preferably, the hydraulic brake operating condition unit further comprises a second control valve 6; the second control valve 6 includes a third transmission oil inlet a3, a fourth transmission oil inlet a4, a third transmission oil outlet b3, a fourth transmission oil outlet b4, and a fifth control oil inlet c5;
the fifth control oil inlet c5 is connected with an oil outlet of the fifth electromagnetic valve 19; the third transmission oil inlet a3 is connected with an outlet of the cooling unit 5; the fourth transmission oil inlet a4 is connected with an oil outlet of the hydraulic brake 23; the third transmission oil outlet b3 is connected with an oil inlet of the hydraulic brake 23; the fourth transmission oil outlet b4 is connected with an inlet of the cooling unit 5;
specifically, the outlet a2 of the hydraulic brake 23 is connected with the inlet of the cooling unit 5 through the second control valve 6, a large amount of waste heat generated by the operation in the brake, the transmission oil with the increased temperature flows out from the outlet a2 of the hydraulic brake 23, and is mixed with the transmission oil pumped out from the oil pool by the oil supply pump 2 and then enters the cooling unit 5, so that the effects of increasing the circulation flow and improving the heat dissipation effect can be achieved.
The oil supply control unit is used for supplying control oil, transmission oil and lubricating oil to the operation working condition control unit, the reversing control unit and the hydraulic braking working condition control unit;
preferably, the oil supply control unit comprises an oil pool 28, an oil supply pump 2, an overflow valve 4, a control pump 7, a pressure regulating valve 9 and a lubricating oil conveying unit; the outlet of the oil pool 28 is connected with the oil supply pump 2; the outlet of the oil supply pump 2 is connected with the inlet of the overflow valve 4; the outlet of the overflow valve 4 is connected with the inlet of the oil supply pump 2; the outlet of the oil supply pump 2 is also connected with the inlet of the cooling unit 5; the inlet of the control pump 7 is connected with the outlet of the cooling unit 5; the outlet of the control pump 7 is connected with the pressure regulating valve 9; the pressure regulating valve 9 is connected with an oil inlet a of the control oil; the outlet of the control pump 7 is also connected with the overflow valve 4;
specifically, in an embodiment of the present invention, the outlet liquid of the oil supply pump 2 partially enters the inlet of the control pump through the cooling unit 5, and a part of the liquid pumped out through the control pump 7 enters the idle pump 26, that is, the outlet of one pump delivers the liquid to the inlet of the other pump, and the oil supply pump 2, the control pump 7 and the idle pump 26 are connected in series. The lubricating oil conveying unit is a plurality of oil conveying pipes.
Preferably, the oil supply control unit further includes a filtering unit; the filtering unit comprises a coarse filter 1, a fine filter 8 and an idle pump coarse filter 25;
two ends of the coarse filter 1 are respectively connected with the oil pool 28 and the oil supply pump 2;
two ends of the fine filter 8 are respectively connected with the control pump 7 and the pressure regulating valve 9;
both ends of the idle pump coarse filter 25 are respectively connected with the idle pump 26 so as to convey lubricating oil to the hydraulic transmission box;
specifically, the liquid at the outlet of the oil supply pump 2 enters the overflow valve 4, so that the oil supply pump 2 can be prevented from being damaged due to overhigh pressure, the liquid decompressed by the overflow valve 4 immediately enters the inlet of the oil supply pump 2 and enters the inlet of the oil supply pump 2 together with the oil filtered by the coarse filter 1, and the functions of increasing the flow and accelerating the circulation of a loop are achieved.
Specifically, the oil supply control unit in this embodiment supplies control oil, transmission oil, and lubricating oil to the operation condition control unit, the reversing control unit, and the hydraulic braking condition control unit through oil supply lines;
specifically, the idle pump 26 in this embodiment is provided with a plurality of check valves 27 for delivering lubricating oil to each component of the hydraulic transmission box for lubrication;
and the cooling unit 5 is used for cooling the operation working condition control unit, the hydraulic braking working condition control unit and the oil supply control unit.
Preferably, the coasting pump 26 is a bidirectional gerotor pump. The check valve 27 prevents oil in the line from flowing back into the reservoir when the locomotive is operating in both directions, a and B.
Specifically, the torque converter 12 in the present embodiment is a hydraulic element that operates at startup and at low speed. The fluid coupling 10 is a hydraulic element and operates at high speed. The hydraulic brake 23 is a hydraulic element, and oil is filled to work in the braking working condition.
The embodiment of the utility model provides an in, hydraulic transmission case can both switch to the hydraulic braking operating mode when low-speed or high-speed operating mode. The working state of the hydraulic transmission case from the high-speed working condition to the low-speed working condition and even stopping is similar to the working process of starting the hydraulic transmission case and raising the low-speed working condition to the high-speed working condition.
Specifically, in this embodiment, the controller 14 is responsible for issuing commands to respectively control the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, and the proportional valve 3; the signals of the input rotating speed sensor 22, the output rotating speed sensor 13, the position sensor 21 and the hydraulic brake cavity temperature sensor 24 are fed back to the controller 14.
Specifically, the controller 14 receives an input rotation speed signal of the hydraulic transmission case, an output rotation speed signal of the hydraulic transmission case, a reversing position signal of the reversing mechanism, and a cavity temperature signal of the hydraulic brake; according to the input rotating speed signal of the hydraulic transmission case, the output rotating speed signal of the hydraulic transmission case and the operating condition control logic, the operating condition control unit is controlled through a third electromagnetic valve 17 and a fourth electromagnetic valve 18, so that oil discharge of the hydraulic torque converter 12 and oil charging operation of the hydraulic coupler 10 are realized; controlling a reversing control unit through the first electromagnetic valve 15 and the second electromagnetic valve 16 according to a reversing position signal and a reversing control logic of the reversing mechanism to realize reversing operation of the reversing mechanism 20; according to the cavity temperature signal of the hydraulic brake and the hydraulic brake control logic, the hydraulic brake working condition unit is controlled through the fifth electromagnetic valve 19, and oil charging/discharging operation of the hydraulic brake 23 is realized;
the implementation method of the operation condition control logic in this embodiment is as follows:
s11, the controller 14 sends out an instruction to open the oil outlet of the third electromagnetic valve 17 and the first control oil inlet c1, the control oil reaches the first control oil inlet c1 of the first control valve 11 through the third electromagnetic valve 17,
s12, opening a first transmission oil inlet a1 and a second transmission oil outlet b2 of the first control valve 11, enabling transmission oil to enter from the first transmission oil inlet a1 of the first control valve 11 and enter into the hydraulic torque converter 12 from the second transmission oil outlet b2 of the first control valve 11, enabling the hydraulic torque converter 12 to be filled with oil for working, and enabling the hydraulic torque converter to enter a starting working condition and a first-gear working condition of a hydraulic transmission box, namely a low-speed working condition; meanwhile, the second transmission oil inlet a2 is closed, and a channel between the second transmission oil inlet a2 and the first transmission oil outlet b1 is closed, so that the hydraulic coupler 10 is prevented from being filled with oil by mistake.
S13, the controller 14 acquires an input rotating speed signal of the hydraulic transmission case and an output rotating speed signal of the hydraulic transmission case in real time;
when in use
When, as shown in the attached figure 3,
the oil outlet of the third electromagnetic valve 17 is closed, the oil outlet of the fourth electromagnetic valve 18 is opened at the same time, at this time, the second control oil inlet c2 is opened, the control oil enters the second control oil inlet c2 through the fourth electromagnetic valve 18, the first transmission oil inlet a1 is closed, the second transmission oil inlet a2 is opened, and the hydraulic torque converter 12 discharges the oil; executing S14; otherwise, repeating S11; wherein i is a constant of the ratio;
s14, opening a first transmission oil outlet b1, enabling transmission oil to enter the hydraulic coupler 10 from the first transmission oil outlet b1, starting oil filling of the hydraulic coupler 10, and enabling the hydraulic transmission case to enter a second-gear working condition, namely a high-speed working condition;
specifically, in this embodiment, the first control valve 11 is a hydraulic valve, and the free state thereof is closed, and when the hydraulic oil is used as the control oil to push the hydraulic oil to move, the hydraulic oil inlet and outlet as the transmission oil can be opened.
The implementation method of the commutation control logic in this embodiment is as follows:
s21: when the locomotive needs to be reversed, the locomotive control system sends a reversing signal to the controller 14, and when the controller 14 receives the reversing signal sent by the locomotive control system, the oil outlet of the third solenoid valve 17 and the oil outlet of the fourth solenoid valve 18 are closed, wherein the locomotive control system is the prior art and is not described in detail herein.
S22: acquiring an input rotating speed signal of a hydraulic transmission box and an output rotating speed signal of the hydraulic transmission box in real time;
s23: executing S24 when the output rotating speed of the hydraulic transmission box is equal to zero and the input rotating speed of the hydraulic transmission box is less than or equal to a first rotating speed threshold value (1100 r/min), otherwise executing S22;
s24: when the reversing signal is that the output rotating direction of the transmission case is switched from the B direction to the A direction, the oil outlet of the first electromagnetic valve 15 is opened, the oil outlet of the second electromagnetic valve 16 is closed, and oil is controlled to enter a third control oil inlet c3 of the reversing mechanism, so that the reversing operation is completed;
when the reversing signal is such that the output rotation direction of the transmission case is switched from the direction A to the direction B, the oil outlet of the second electromagnetic valve 16 is opened, the oil outlet of the first electromagnetic valve 15 is closed, and the control oil enters a fourth control oil inlet c4 of the reversing mechanism to complete the reversing operation.
The implementation method of the hydraulic brake control logic in the embodiment is as follows:
s31: the controller 14 obtains an input rotation speed signal of the hydraulic transmission case, when the input rotation speed of the hydraulic transmission case is greater than a second rotation speed threshold (1300 r/min), in order to ensure the heat dissipation capacity during hydraulic braking, the controller 14 sends an instruction to close the oil outlet of the third electromagnetic valve 17 and the oil outlet of the fourth electromagnetic valve 18, open the oil outlet of the fifth electromagnetic valve 19, so that control oil enters the second control valve 6 from the control oil pipeline, open the third transmission oil inlet a3 and the third transmission oil outlet b3, and fill oil in the hydraulic brake 23 to complete hydraulic braking operation;
s32: as real-time protection for the hydraulic transmission case, the controller 14 obtains a cavity temperature signal of the hydraulic brake in real time, and when the cavity temperature of the hydraulic brake 23 is greater than a temperature threshold value, closes the oil outlet of the fifth electromagnetic valve 19, closes the third transmission oil inlet a3 and the third transmission oil outlet b3, opens the fourth transmission oil inlet a4 and the fourth transmission oil outlet b4, and discharges oil to the hydraulic brake 23 for operation.
Specifically, in this embodiment, the second control valve 6 is also a hydraulic valve, and the free state is closed, and the hydraulic oil serving as the control oil pushes the hydraulic valve to move, so that the inlet and the outlet of the hydraulic oil serving as the transmission oil can be opened.
Specifically, the controller 14 in this embodiment can also adjust the change of the oil filling amount in the cavity of the hydraulic brake 23 by adjusting the current of the proportional valve 3 to continuously change, thereby adjusting the magnitude of the hydraulic braking force, as shown in fig. 2.
Specifically, the controller in this embodiment is a conventional controller, and here, only the operating condition control logic, the reversing control logic, and the hydraulic braking control logic in this embodiment are implemented by using the conventional controller, which does not belong to the invention of the present invention, and detailed description is not provided here.
According to the hydraulic transmission case control system with the hydraulic braking function, the controller is integrated on the hydraulic transmission case to acquire signals of the input rotating speed sensor, the output rotating speed sensor, the position sensor and the hydraulic brake cavity temperature sensor, and the operation condition control unit, the reversing control unit and the hydraulic braking condition control unit are controlled; the integrated level is high, and the reliability is good, and control is steady, and is shock-resistant, and life is longer.
In the embodiment, the hydraulic transmission case and the integrated controller are adopted, and the functions of locomotive traction, reversing, gear shifting, braking and the like can be realized only by cable connection with the vehicle-mounted PC. The integration level is high, and the reliability is good. Meanwhile, by adopting a hydraulic technology, the hydraulic control system is stable in control, impact-resistant and long in service life.
This embodiment adopts the fuel feeding pump export to link to each other with the import of overflow valve, and the overflow valve export links to each other with the fuel feeding pump import, and the hydraulic brake export links to each other through the import of second control valve with cooling unit, increases the circulation flow who gets into the fuel feeding pump, and the import that gets into cooling unit again from hydraulic brake internal outflow circulates, has also increased the circulation flow who gets into cooling unit simultaneously, reaches the effect that reduces cooling unit heat radiating area, alleviates cooling unit's volume and weight.
This embodiment still adopts the multi-pump intercommunication, step by step pressurization technique, the oil that the fuel feed pump was taken out passes through the radiator, get into the control pump again, the oil that the control pump was taken out gets into the lazy pump again, through the cubic pressurization, it is specific for the export liquid of fuel feed pump partly gets into the control pump import through cooling unit, partly entering lazy pump of liquid that the control pump was taken out, a pump outlet is to the entry transport liquid of another pump promptly, the fuel feed pump, the control pump, the lazy pump has the series relation, increase the control pump step by step, the export pressure of inertia pump, it needs to be greater than the fuel feed pressure to satisfy transmission case control pressure, lubricating pressure is greater than the demand of control pressure, improve oil pump efficiency.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (7)
1. A hydraulic transmission case control system with a hydraulic braking function is characterized by comprising a controller (14), an operation condition control unit, a reversing control unit, a hydraulic braking condition control unit, an oil supply control unit, a monitoring unit, a first electromagnetic valve (15), a second electromagnetic valve (16), a third electromagnetic valve (17), a fourth electromagnetic valve (18) and a fifth electromagnetic valve (19);
the monitoring unit comprises an input rotating speed sensor (22), an output rotating speed sensor (13), two groups of position sensors (21) and a hydraulic brake cavity temperature sensor (24);
the input rotating speed sensor (22) is arranged at the input end of the hydraulic transmission case;
the output rotating speed sensor (13) is arranged at the output end of the hydraulic transmission case; two groups of position sensors (21) are arranged on two sides of the reversing mechanism (20); the hydraulic brake cavity temperature sensor (24) is arranged at the oil outlet end of the hydraulic brake (23);
the rotating speed sensor (22), the output rotating speed sensor (13), the two groups of position sensors (21) and the hydraulic brake cavity temperature sensor (24) are electrically connected with the controller (14);
the controller (14) is electrically connected with the first electromagnetic valve (15), the second electromagnetic valve (16), the third electromagnetic valve (17), the fourth electromagnetic valve (18) and the fifth electromagnetic valve (19); the first electromagnetic valve (15), the second electromagnetic valve (16), the third electromagnetic valve (17), the fourth electromagnetic valve (18) and the fifth electromagnetic valve (19) share an oil inlet a of control oil;
the third electromagnetic valve (17) and the fourth electromagnetic valve (18) are connected with the operation condition control unit;
the first electromagnetic valve (15) and the second electromagnetic valve (16) are both connected with the reversing control unit;
the fifth electromagnetic valve (19) is connected with the hydraulic braking working condition control unit;
the oil supply control unit is respectively connected with the controller (14), the operation working condition control unit, the reversing control unit and the hydraulic braking working condition control unit.
2. A fluid power transmission case control system with a fluid power braking function according to claim 1, characterized by further comprising a cooling unit (5);
and the cooling unit (5) is connected with the operation working condition control unit, the hydraulic braking working condition control unit and the oil supply control unit.
3. A fluid power transmission case control system with a fluid braking function according to claim 2, wherein the operating condition control unit includes a first control valve (11), a fluid coupling (10), and a torque converter (12), and the first control valve (11) includes a first transmission oil inlet a1, a second transmission oil inlet a2, a first transmission oil outlet b1, a second transmission oil outlet b2, a first control oil inlet c1, a second control oil inlet c2; the first transmission oil inlet a1 is connected with an outlet of the cooling unit (5); the second transmission oil inlet a2 and the second transmission oil outlet b2 are both connected with the hydraulic torque converter (12); the first transmission oil outlet b1 is connected with the hydraulic coupler (10); the first control oil inlet c1 is connected with an oil outlet of the third electromagnetic valve (17); the second control oil inlet c2 is connected with an oil outlet of the fourth solenoid valve (18).
4. A hydrodynamic transmission case control system with hydrodynamic braking function according to claim 1, characterized in that the reversing control unit comprises a reversing mechanism (20), the reversing mechanism (20) comprises a third control oil inlet c3 and a fourth control oil inlet c4;
the third control oil inlet c3 is connected with an oil outlet of the first electromagnetic valve (15);
the fourth control oil inlet c4 is connected with an oil outlet of the second solenoid valve (16).
5. A hydrodynamic transmission case control system with hydrodynamic braking function according to claim 2, characterized in that the hydrodynamic braking condition unit comprises a hydrodynamic brake (23), a second control valve (6); the second control valve (6) comprises a third transmission oil inlet a3, a fourth transmission oil inlet a4, a third transmission oil outlet b3, a fourth transmission oil outlet b4 and a fifth control oil inlet c5;
the fifth control oil inlet c5 is connected with an oil outlet of the fifth electromagnetic valve (19); the third transmission oil inlet a3 is connected with an outlet of the cooling unit (5); the fourth transmission oil inlet a4 is connected with an oil outlet of the hydraulic brake (23); the third transmission oil outlet b3 is connected with an oil inlet of the hydraulic brake (23); the fourth transmission oil outlet b4 is connected with an inlet of the cooling unit (5).
6. The hydraulic transmission case control system with hydraulic braking function according to claim 2, wherein the oil supply control unit comprises an oil pool (28), an oil supply pump (2), an overflow valve (4), a control pump (7), and a pressure regulating valve (9); the outlet of the oil pool (28) is connected with the oil supply pump (2); the outlet of the oil supply pump (2) is connected with the inlet of the overflow valve (4); the outlet of the overflow valve (4) is connected with the inlet of the oil supply pump (2); the outlet of the oil supply pump (2) is also connected with the inlet of the cooling unit (5); the inlet of the control pump (7) is connected with the outlet of the cooling unit (5); the outlet of the control pump (7) is connected with the pressure regulating valve (9); the pressure regulating valve (9) is connected with an oil inlet a of the control oil; the outlet of the control pump (7) is also connected with the overflow valve (4);
the oil supply control unit also comprises a filtering unit; the filtering unit comprises a coarse filter (1), a fine filter (8) and an idle pump coarse filter (25);
two ends of the coarse filter (1) are respectively connected with the oil pool (28) and the oil supply pump (2);
two ends of the fine filter (8) are respectively connected with the control pump (7) and the pressure regulating valve (9);
and two ends of the idle pump coarse filter (25) are respectively connected with an idle pump (26) to convey lubricating oil to the hydraulic transmission box.
7. The fluid transmission case control system with hydraulic brake function according to claim 6, characterized in that the coasting pump (26) is a bidirectional gerotor pump.
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| CN202223587771.4U CN218882981U (en) | 2022-12-30 | 2022-12-30 | Hydraulic transmission case control system with hydraulic braking function |
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| CN202223587771.4U CN218882981U (en) | 2022-12-30 | 2022-12-30 | Hydraulic transmission case control system with hydraulic braking function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024139776A1 (en) * | 2022-12-30 | 2024-07-04 | 中车大连机车研究所有限公司 | Hydraulic transmission gear box control system with hydraulic braking function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024139776A1 (en) * | 2022-12-30 | 2024-07-04 | 中车大连机车研究所有限公司 | Hydraulic transmission gear box control system with hydraulic braking function |
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