A transmission gearbox internal oil supply system with a clutch

Abstract

The utility model relates to a transmission gear case internal oil supply system with clutch relates to oil supply system technical field. To solve the problem that the existing oil supply system cannot supply lubricating oil and working oil simultaneously, thereby seriously influence the stability of transmission gear case operation, and then lead to transmission gear case easy to appear the failure, and cannot satisfy the multi -working condition operation, this kind of oil supply system realizes the supply of lubricating oil and working oil simultaneously, avoids the phenomenon that transmission gear unit lacks lubricating oil or clutch lacks working oil, guarantees the supply of lubricating oil in transmission gear unit, simultaneously still guarantees the supply of working oil in clutch, thereby improves the stability of transmission gear case operation, greatly reduces the failure rate of transmission gear case, and then satisfies the operation of multiple working conditions, the utility model is applicable to transmission gear case internal oil supply system field with clutch.

Description

Technical Field

[0001] This invention relates to the field of oil supply system technology, and more specifically to an internal oil supply system for a transmission gearbox with a clutch. Background Technology

[0002] Gear transmission devices with clutches are used in many types of ships in my country, responsible for missions such as anti-submarine warfare, medium and short-range air defense and anti-missile defense, and anti-ship warfare. They also have the ability to command formation operations and regional anti-submarine warfare. Their oil supply device is responsible for the heat dissipation and lubrication of the gears, bearings and other components of the reduction gear transmission device. Its stability directly affects the reliable operation of the gear transmission device.

[0003] The existing oil supply system cannot supply lubricating oil and working oil simultaneously, which seriously affects the stability of the transmission gearbox operation, leading to frequent failures and the inability to meet the requirements of multi-condition operation. Summary of the Invention

[0004] This invention addresses the problem that existing oil supply systems cannot simultaneously supply lubricating oil and working oil, which severely affects the stability of transmission gearbox operation, leading to frequent gearbox failures and inability to meet multi-condition operation requirements. Therefore, this invention proposes an internal oil supply system for transmission gearboxes with a clutch.

[0005] The present invention discloses an internal oil supply system for a transmission gearbox with a clutch, comprising an automatic lubricating oil temperature regulator 1, a plate heat exchanger 2, a double oil filter 3, an electric backup oil pump 4, a gearbox oil pan 5, a shaft belt lubricating oil pump 6, an electric backup working oil pump for the clutch 7, a one-way valve 8, a throttling element 9, an overflow valve 10, an oil filter 11, a high-precision oil filter 12, a shaft belt clutch working oil pump 13, and a two-stage pressure regulating valve assembly 14.

[0006] The output port of one end of the gearbox oil pan 5 is connected to the input end of the electric backup oil pump 4 via a pipeline. The output end of the electric backup oil pump 4 is connected to the input end of the double oil filter 3 via a pipeline. The output end of the double oil filter 3 is connected to one end of the plate heat exchanger 2 via a pipeline. The other end of the plate heat exchanger 2 is connected to one end of the automatic lubricating oil temperature regulator 1. The other end of the automatic lubricating oil temperature regulator 1 is connected to the transmission gear unit via a pipeline. The side port of the automatic lubricating oil temperature regulator 1 is connected to the plate heat exchanger 2 and the double oil filter via a pipeline. The pipe connecting the device 3 is connected to the transmission gear unit. The other end of the automatic lubricating oil temperature regulator 1 is connected to the first input port of the overflow valve 10 via a pipe. The output port of the overflow valve 10 is connected to the first input port of the gearbox oil pan 5 via a pipe. The connection between the electric standby oil pump 4 and the double oil filter 3 is connected to the second input port of the overflow valve 10 via a pipe. The output end of the electric standby oil pump 4 is connected in parallel with a throttling element 9, and the output end of the throttling element 9 is connected to the second input port of the gearbox oil pan 5 via a pipe. The middle outlet of the gearbox oil pan 5 is connected to the input end of the shaft-driven lubricating oil pump 6 via a pipeline. The output end of the shaft-driven lubricating oil pump 6 is connected to the connection point of the double oil filter 3 and the electric backup oil pump 4 via a pipeline. The other outlet of the gearbox oil pan 5 is connected to the input end of the clutch electric backup working oil pump 7 via a pipeline. The output end of the clutch electric backup working oil pump 7 is connected to one end of the check valve 8. The other end of the check valve 8 is connected to one end of the oil filter 11 via a pipeline. The other end of the oil filter 11 is connected to the high-precision oil filter via a pipeline. One end of the device 12 is connected to the high-precision oil filter 12, and the other end of the high-precision oil filter 12 is connected to the input end of the secondary pressure regulating valve assembly 14 through a pipe. The first output end of the secondary pressure regulating valve assembly 14 is connected to the clutch through a pipe. The other end of the automatic lubricating oil temperature regulator 1 is connected to the transmission gear unit and the input end of the shaft belt clutch working oil pump 13 through a pipe. The output end of the shaft belt clutch working oil pump 13 is connected to the input end of the secondary pressure regulating valve assembly 14 through a pipe. The second output end of the secondary pressure regulating valve assembly 14 is connected to the clutch through a pipe.

[0007] Furthermore, the connection between the dual oil filter 3 and the throttling element 9 is connected to the connection between the gearbox oil pan 5 and the shaft-driven lubricating oil pump 6 via a pipe.

[0008] Furthermore, the electric backup oil pump 4 is equipped with a one-way valve 8 at both its input and output ends;

[0009] Furthermore, a one-way valve 8 is provided on the output end of the shaft-driven lubricating oil pump 6;

[0010] Furthermore, a one-way valve 8 is provided on the input end of the clutch electric backup oil pump 7;

[0011] Furthermore, a one-way valve 8 is provided at the output end of the shaft clutch working oil pump 13 and the second output end of the secondary pressure regulating valve assembly 14 respectively;

[0012] Furthermore, during use, the oil supply system has two sets of oil circuits: one is the gearbox lubricating oil supply circuit; the other is the clutch working oil supply circuit.

[0013] The specific flow direction of the gearbox lubricating oil supply circuit is as follows: electric standby oil pump 4, shaft-driven lubricating oil pump 6 → double oil filter 3 → plate heat exchanger 2 → lubricating oil temperature automatic regulator 1 → transmission gear unit.

[0014] The gearbox requires lubricating oil supplied by an electric standby oil pump 4 and a shaft-driven lubricating oil pump 6. Both pumps draw oil from the gearbox oil pan 5. The discharged lubricating oil is filtered by a double oil filter 3 and cooled by a plate heat exchanger 2 before being sent to various parts of the gearbox that require lubrication and cooling. The automatic lubricating oil temperature regulator 1 maintains the lubricating oil temperature within the calibrated range. The lubricating oil pressure entering the gearbox is regulated by an overflow valve 10. The differential pressure transmitter of the double oil filter 3 issues an alarm signal when the pressure difference between the filter inlet and outlet exceeds the set differential pressure alarm value. The plate heat exchanger 2 is also equipped with thermometers at the lubricating oil inlet and outlet, and the cooling water inlet and outlet to observe the cooler's operation. One-way valves 8 are installed on the suction pipes of both pumps to prevent backflow of lubricating oil. One-way valves 8 are also installed on the pump outlet pipes to allow for independent operation of either the shaft-driven pump or the electric pump.

[0015] The specific flow direction of the clutch working oil supply circuit is as follows: clutch electric standby working oil pump 7 → oil filter 11 → high precision oil filter 12 → shaft belt clutch working oil pump 13 → secondary pressure regulating valve assembly 14 → clutch.

[0016] The clutch oil supply circuit provides working oil to the clutch, which is supplied by the shaft-driven clutch oil pump 13 and the electric backup clutch oil pump 7. The shaft-driven clutch oil pump 13 draws oil from the lubrication system. When the clutch is engaged, the solenoid coil of the solenoid reversing valve in the secondary pressure regulating valve assembly 14 is energized, pushing the spool valve to move. Working oil enters the working cylinder of the friction clutch, pushing the piston to press the inner and outer friction plates. The working oil pressure is increased to the rated pressure through the secondary pressure regulating valve assembly 14. The resulting frictional torque is used to transmit the working torque. When the clutch is disengaged, the spool valve of the secondary pressure regulating valve assembly 14 reverses, and the working cylinder of the friction clutch is connected to the return oil line. At the same time, the pressurized oil in the working cylinder is quickly discharged through the quick-release valve, and the clutch is disengaged.

[0017] In this oil supply system, the overflow valve 10, the lubricating oil used, and the return oil from the clutch all return to the oil pan of the main propulsion gearbox. One side of the dual oil filter 3 is operational, while the other side is on standby. After the filter has been working for a period of time, the filter element becomes clogged with dirt in the lubricating oil, increasing the pressure difference between the filter's inlet and outlet. When the pressure difference exceeds the specified value, the silver-white display window of the differential pressure transmitter turns completely red, and an alarm signal is issued, notifying the operator to switch the filter handle to put the standby filter into use. The clogged filter can then be cleaned.

[0018] The cooling of the lubricating oil is accomplished by plate heat exchanger 2. An automatic lubricating oil temperature regulator 1, connected to a bypass pipe of plate heat exchanger 2, adjusts the flow rate of lubricating oil entering the plate heat exchanger according to the lubricating oil temperature, ensuring that the lubricating oil temperature meets the usage requirements. The plates of the plate heat exchanger are the heat transfer elements, and the gaskets are the sealing elements, with the gaskets pasted into the gasket grooves of the plates. The plates with the gaskets pasted are placed in a specific order between the fixed and movable clamping plates, tightened with clamping bolts, and a certain gap is maintained between adjacent plates to form a fluid channel. The heat exchange medium enters and exits from its designated inlets on the fixed clamping plate, and alternately enters the fluid channel between the plates for heat exchange.

[0019] Equipped with an automatic temperature regulation function, when the lubricating oil temperature flowing through the automatic lubricating oil temperature regulator 1 rises to the sensing range of the temperature sensing element, the temperature sensing element pushes the top column of the thermistor outward, pushing the rotary valve shaft, causing the rotary valve to rotate counterclockwise. The higher the lubricating oil temperature, the larger the rotation angle of the rotary valve, and the wider the valve port connected to the heat exchanger opens accordingly, allowing some lubricating oil to enter the gearbox through the plate heat exchanger 2. When the lubricating oil temperature reaches the upper limit of the temperature sensing range of the thermistor, all valve ports connected to the filter outlet are closed, and all valve ports connected to the plate heat exchanger 2 outlet are opened. At this time, all lubricating oil will be cooled by the heat exchanger before entering the gearbox. When the temperature of the lubricating oil flowing through the automatic lubricating oil temperature regulator 1 drops, the temperature-sensing element inside the thermosensitive element contracts accordingly, and the rotary valve is driven to rotate clockwise. The valve port connected to the oil outlet of the heat exchanger gradually closes, while the valve port connected to the oil outlet of the filter gradually opens. When the lubricating oil temperature drops below the temperature sensing range of the thermosensitive element, the temperature-sensing element completely contracts and recovers. Under the action of the return spring, the rotary valve returns to its initial position.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] This invention overcomes the shortcomings of the prior art. The oil supply system has two oil circuits: one is the gearbox lubricating oil supply circuit; the other is the clutch working oil supply circuit.

[0022] The specific flow direction of the gearbox lubricating oil supply circuit is as follows: electric standby oil pump, shaft belt lubricating oil pump → double oil filter → plate heat exchanger → automatic lubricating oil temperature regulator → transmission gear unit.

[0023] The gearbox requires lubricating oil supplied by an electric standby oil pump and a shaft-driven lubricating oil pump. Both pumps draw oil from the gearbox oil pan. The discharged lubricating oil is filtered through a dual oil filter and cooled by a plate heat exchanger before being delivered to various parts of the gearbox requiring lubrication and cooling. An automatic lubricating oil temperature regulator maintains the lubricating oil temperature within the specified range. The lubricating oil pressure entering the gearbox is regulated by an overflow valve. The differential pressure transmitter of the dual oil filter issues an alarm signal when the pressure difference between the filter's inlet and outlet exceeds the set alarm value. Thermometers are also installed at the inlet and outlet of the plate heat exchanger for lubricating oil and cooling water to monitor the cooler's operation. One-way valves are installed on the suction lines of both pumps to prevent backflow of lubricating oil. One-way valves are also installed on the pump outlet lines to allow for independent operation of either the shaft-driven or electric pump.

[0024] The specific flow direction of the clutch working oil supply circuit is as follows: clutch electric standby working oil pump → oil filter → high precision oil filter → shaft belt clutch working oil pump → secondary pressure regulating valve assembly → clutch;

[0025] The clutch oil supply circuit provides working oil to the clutch, supplied by a shaft-driven clutch oil pump and a backup electric clutch oil pump. The shaft-driven clutch oil pump draws oil from the lubrication system. When the clutch is engaged, the solenoid coil of the secondary pressure regulating valve assembly's solenoid directional valve is energized, pushing the spool valve to move. Working oil enters the working cylinder of the friction clutch, pushing the piston to press against the inner and outer friction plates. The secondary pressure regulating valve assembly raises the working oil pressure to the rated pressure, generating frictional torque to transmit the working torque. When the clutch disengages, the spool valve of the secondary pressure regulating valve assembly reverses, connecting the friction clutch's working cylinder to the return oil line. Simultaneously, the pressurized oil in the working cylinder is rapidly discharged through the quick-release valve, disengaging the clutch.

[0026] This type of oil supply system enables the simultaneous supply of lubricating oil and working oil, avoiding the phenomenon of insufficient lubricating oil in the transmission gear unit or insufficient working oil in the clutch. It ensures the supply of lubricating oil in the transmission gear unit and the supply of working oil in the clutch, thereby improving the stability of the transmission gearbox operation, greatly reducing the failure rate of the transmission gearbox, and thus meeting the operation requirements of various working conditions. Attached Figure Description

[0027] Figure 1 This is a schematic diagram illustrating the working principle of an internal oil supply system for a transmission gearbox with a clutch, as described in this invention. Detailed Implementation

[0028] Specific implementation method one: Combining Figure 1This embodiment describes an internal oil supply system for a transmission gearbox with a clutch, comprising an automatic lubricating oil temperature regulator 1, a plate heat exchanger 2, a double oil filter 3, an electric backup oil pump 4, a gearbox oil pan 5, a shaft-driven lubricating oil pump 6, an electric backup working oil pump for the clutch 7, a one-way valve 8, a throttling element 9, an overflow valve 10, an oil filter 11, a high-precision oil filter 12, a shaft-driven clutch working oil pump 13, and a two-stage pressure regulating valve assembly 14.

[0029] The output port of one end of the gearbox oil pan 5 is connected to the input end of the electric backup oil pump 4 via a pipeline. The output end of the electric backup oil pump 4 is connected to the input end of the double oil filter 3 via a pipeline. The output end of the double oil filter 3 is connected to one end of the plate heat exchanger 2 via a pipeline. The other end of the plate heat exchanger 2 is connected to one end of the automatic lubricating oil temperature regulator 1. The other end of the automatic lubricating oil temperature regulator 1 is connected to the transmission gear unit via a pipeline. The side port of the automatic lubricating oil temperature regulator 1 is connected to the plate heat exchanger 2 and the double oil filter via a pipeline. The pipe connecting the device 3 is connected to the transmission gear unit. The other end of the automatic lubricating oil temperature regulator 1 is connected to the first input port of the overflow valve 10 via a pipe. The output port of the overflow valve 10 is connected to the first input port of the gearbox oil pan 5 via a pipe. The connection between the electric standby oil pump 4 and the double oil filter 3 is connected to the second input port of the overflow valve 10 via a pipe. The output end of the electric standby oil pump 4 is connected in parallel with a throttling element 9, and the output end of the throttling element 9 is connected to the second input port of the gearbox oil pan 5 via a pipe. The middle outlet of the gearbox oil pan 5 is connected to the input end of the shaft-driven lubricating oil pump 6 via a pipeline. The output end of the shaft-driven lubricating oil pump 6 is connected to the connection point of the double oil filter 3 and the electric backup oil pump 4 via a pipeline. The other outlet of the gearbox oil pan 5 is connected to the input end of the clutch electric backup working oil pump 7 via a pipeline. The output end of the clutch electric backup working oil pump 7 is connected to one end of the check valve 8. The other end of the check valve 8 is connected to one end of the oil filter 11 via a pipeline. The other end of the oil filter 11 is connected to the high-precision oil filter via a pipeline. One end of the device 12 is connected to the high-precision oil filter 12, and the other end of the high-precision oil filter 12 is connected to the input end of the secondary pressure regulating valve assembly 14 through a pipe. The first output end of the secondary pressure regulating valve assembly 14 is connected to the clutch through a pipe. The other end of the automatic lubricating oil temperature regulator 1 is connected to the transmission gear unit and the input end of the shaft belt clutch working oil pump 13 through a pipe. The output end of the shaft belt clutch working oil pump 13 is connected to the input end of the secondary pressure regulating valve assembly 14 through a pipe. The second output end of the secondary pressure regulating valve assembly 14 is connected to the clutch through a pipe.

[0030] In this specific embodiment, the oil supply system has two sets of oil circuits during use; one is the gearbox lubricating oil supply circuit; the other is the clutch working oil supply circuit.

[0031] The specific flow direction of the gearbox lubricating oil supply circuit is as follows: electric standby oil pump 4, shaft-driven lubricating oil pump 6 → double oil filter 3 → plate heat exchanger 2 → lubricating oil temperature automatic regulator 1 → transmission gear unit.

[0032] The gearbox requires lubricating oil supplied by an electric standby oil pump 4 and a shaft-driven lubricating oil pump 6. Both pumps draw oil from the gearbox oil pan 5. The discharged lubricating oil is filtered by a double oil filter 3 and cooled by a plate heat exchanger 2 before being sent to various parts of the gearbox that require lubrication and cooling. The automatic lubricating oil temperature regulator 1 maintains the lubricating oil temperature within the calibrated range. The lubricating oil pressure entering the gearbox is regulated by an overflow valve 10. The differential pressure transmitter of the double oil filter 3 issues an alarm signal when the pressure difference between the filter inlet and outlet exceeds the set differential pressure alarm value. The plate heat exchanger 2 is also equipped with thermometers at the lubricating oil inlet and outlet, and the cooling water inlet and outlet to observe the cooler's operation. One-way valves 8 are installed on the suction pipes of both pumps to prevent backflow of lubricating oil. One-way valves 8 are also installed on the pump outlet pipes to allow for independent operation of either the shaft-driven pump or the electric pump.

[0033] The specific flow direction of the clutch working oil supply circuit is as follows: clutch electric standby working oil pump 7 → oil filter 11 → high precision oil filter 12 → shaft belt clutch working oil pump 13 → secondary pressure regulating valve assembly 14 → clutch.

[0034] The clutch oil supply circuit provides working oil to the clutch, which is supplied by the shaft-driven clutch oil pump 13 and the electric backup clutch oil pump 7. The shaft-driven clutch oil pump 13 draws oil from the lubrication system. When the clutch is engaged, the solenoid coil of the solenoid reversing valve in the secondary pressure regulating valve assembly 14 is energized, pushing the spool valve to move. Working oil enters the working cylinder of the friction clutch, pushing the piston to press the inner and outer friction plates. The working oil pressure is increased to the rated pressure through the secondary pressure regulating valve assembly 14. The resulting frictional torque is used to transmit the working torque. When the clutch is disengaged, the spool valve of the secondary pressure regulating valve assembly 14 reverses, and the working cylinder of the friction clutch is connected to the return oil line. At the same time, the pressurized oil in the working cylinder is quickly discharged through the quick-release valve, and the clutch is disengaged.

[0035] In this oil supply system, the overflow valve 10, the lubricating oil used, and the return oil from the clutch all return to the oil pan of the main propulsion gearbox. One side of the dual oil filter 3 is operational, while the other side is on standby. After the filter has been working for a period of time, the filter element becomes clogged with dirt in the lubricating oil, increasing the pressure difference between the filter's inlet and outlet. When the pressure difference exceeds the specified value, the silver-white display window of the differential pressure transmitter turns completely red, and an alarm signal is issued, notifying the operator to switch the filter handle to put the standby filter into use. The clogged filter can then be cleaned.

[0036] The cooling of the lubricating oil is accomplished by plate heat exchanger 2. An automatic lubricating oil temperature regulator 1, connected to a bypass pipe of plate heat exchanger 2, adjusts the flow rate of lubricating oil entering the plate heat exchanger according to the lubricating oil temperature, ensuring that the lubricating oil temperature meets the usage requirements. The plates of the plate heat exchanger are the heat transfer elements, and the gaskets are the sealing elements, with the gaskets pasted into the gasket grooves of the plates. The plates with the gaskets pasted are placed in a specific order between the fixed and movable clamping plates, tightened with clamping bolts, and a certain gap is maintained between adjacent plates to form a fluid channel. The heat exchange medium enters and exits from its designated inlets on the fixed clamping plate, and alternately enters the fluid channel between the plates for heat exchange.

[0037] Equipped with an automatic temperature regulation function, when the lubricating oil temperature flowing through the automatic lubricating oil temperature regulator 1 rises to the sensing range of the temperature sensing element, the temperature sensing element pushes the top column of the thermistor outward, pushing the rotary valve shaft, causing the rotary valve to rotate counterclockwise. The higher the lubricating oil temperature, the larger the rotation angle of the rotary valve, and the wider the valve port connected to the heat exchanger opens accordingly, allowing some lubricating oil to enter the gearbox through the plate heat exchanger 2. When the lubricating oil temperature reaches the upper limit of the temperature sensing range of the thermistor, all valve ports connected to the filter outlet are closed, and all valve ports connected to the plate heat exchanger 2 outlet are opened. At this time, all lubricating oil will be cooled by the heat exchanger before entering the gearbox. When the temperature of the lubricating oil flowing through the automatic lubricating oil temperature regulator 1 drops, the temperature-sensing element inside the thermosensitive element contracts accordingly, and the rotary valve is driven to rotate clockwise. The valve port connected to the oil outlet of the heat exchanger gradually closes, while the valve port connected to the oil outlet of the filter gradually opens. When the lubricating oil temperature drops below the temperature sensing range of the thermosensitive element, the temperature-sensing element completely contracts and recovers. Under the action of the return spring, the rotary valve returns to its initial position.

[0038] Specific Implementation Method Two: Combining Figure 1 This embodiment further defines the oil supply system described in Specific Embodiment 1. In this embodiment, an internal oil supply system for a transmission gearbox with a clutch is provided. The connection between the dual oil filter 3 and the throttling element 9 is connected to the connection between the output port in the middle of the gearbox oil pan 5 and the shaft-driven lubricating oil pump 6 via a pipeline.

[0039] Specific implementation method three: Combining Figure 1 This embodiment further defines the oil supply system described in Specific Embodiment 1. The oil supply system inside the transmission gearbox with a clutch described in this embodiment has one-way valves 8 on the input and output ends of the electric backup oil pump 4.

[0040] Specific implementation method four: Combination Figure 1This embodiment further defines the oil supply system described in Specific Embodiment Two. The oil supply system inside the transmission gearbox with a clutch described in this embodiment has a one-way valve 8 on the output end of the shaft-driven lubricating oil pump 6.

[0041] Specific Implementation Method Five: Combining Figure 1 This embodiment further defines the oil supply system described in Specific Embodiment 1. The oil supply system inside the transmission gearbox with a clutch described in this embodiment has a one-way valve 8 on the input end of the clutch electric standby working oil pump 7.

[0042] Specific Implementation Method Six: Combination Figure 1 This embodiment further defines the oil supply system described in Specific Embodiment 1. In this embodiment, an internal oil supply system for a transmission gearbox with a clutch is provided, wherein the output end of the shaft-driven clutch working oil pump 13 and the second output end of the secondary pressure regulating valve assembly 14 are respectively provided with a one-way valve 8.

[0043] Working principle

[0044] During use, the oil supply system has two oil circuits: one is the gearbox lubricating oil supply circuit; the other is the clutch working oil supply circuit.

[0045] The specific flow direction of the gearbox lubricating oil supply circuit is as follows: electric standby oil pump 4, shaft-driven lubricating oil pump 6 → double oil filter 3 → plate heat exchanger 2 → lubricating oil temperature automatic regulator 1 → transmission gear unit.

[0046] The gearbox requires lubricating oil supplied by an electric standby oil pump 4 and a shaft-driven lubricating oil pump 6. Both pumps draw oil from the gearbox oil pan 5. The discharged lubricating oil is filtered by a double oil filter 3 and cooled by a plate heat exchanger 2 before being sent to various parts of the gearbox that require lubrication and cooling. The automatic lubricating oil temperature regulator 1 maintains the lubricating oil temperature within the calibrated range. The lubricating oil pressure entering the gearbox is regulated by an overflow valve 10. The differential pressure transmitter of the double oil filter 3 issues an alarm signal when the pressure difference between the filter inlet and outlet exceeds the set differential pressure alarm value. The plate heat exchanger 2 is also equipped with thermometers at the lubricating oil inlet and outlet, and the cooling water inlet and outlet to observe the cooler's operation. One-way valves 8 are installed on the suction pipes of both pumps to prevent backflow of lubricating oil. One-way valves 8 are also installed on the pump outlet pipes to allow for independent operation of either the shaft-driven pump or the electric pump.

[0047] The specific flow direction of the clutch working oil supply circuit is as follows: clutch electric standby working oil pump 7 → oil filter 11 → high precision oil filter 12 → shaft belt clutch working oil pump 13 → secondary pressure regulating valve assembly 14 → clutch.

[0048] The clutch oil supply circuit provides working oil to the clutch, which is supplied by the shaft-driven clutch oil pump 13 and the electric backup clutch oil pump 7. The shaft-driven clutch oil pump 13 draws oil from the lubrication system. When the clutch is engaged, the solenoid coil of the solenoid reversing valve in the secondary pressure regulating valve assembly 14 is energized, pushing the spool valve to move. Working oil enters the working cylinder of the friction clutch, pushing the piston to press the inner and outer friction plates. The working oil pressure is increased to the rated pressure through the secondary pressure regulating valve assembly 14. The resulting frictional torque is used to transmit the working torque. When the clutch is disengaged, the spool valve of the secondary pressure regulating valve assembly 14 reverses, and the working cylinder of the friction clutch is connected to the return oil line. At the same time, the pressurized oil in the working cylinder is quickly discharged through the quick-release valve, and the clutch is disengaged.

[0049] In this oil supply system, the overflow valve 10, the lubricating oil used, and the return oil from the clutch all return to the oil pan of the main propulsion gearbox. One side of the dual oil filter 3 is operational, while the other side is on standby. After the filter has been working for a period of time, the filter element becomes clogged with dirt in the lubricating oil, increasing the pressure difference between the filter's inlet and outlet. When the pressure difference exceeds the specified value, the silver-white display window of the differential pressure transmitter turns completely red, and an alarm signal is issued, notifying the operator to switch the filter handle to put the standby filter into use. The clogged filter can then be cleaned.

[0050] The cooling of the lubricating oil is accomplished by plate heat exchanger 2. An automatic lubricating oil temperature regulator 1, connected to a bypass pipe of plate heat exchanger 2, adjusts the flow rate of lubricating oil entering the plate heat exchanger according to the lubricating oil temperature, ensuring that the lubricating oil temperature meets the usage requirements. The plates of the plate heat exchanger are the heat transfer elements, and the gaskets are the sealing elements, with the gaskets pasted into the gasket grooves of the plates. The plates with the gaskets pasted are placed in a specific order between the fixed and movable clamping plates, tightened with clamping bolts, and a certain gap is maintained between adjacent plates to form a fluid channel. The heat exchange medium enters and exits from its designated inlets on the fixed clamping plate, and alternately enters the fluid channel between the plates for heat exchange.

[0051] Equipped with an automatic temperature regulation function, when the lubricating oil temperature flowing through the automatic lubricating oil temperature regulator 1 rises to the sensing range of the temperature sensing element, the temperature sensing element pushes the top column of the thermistor outward, pushing the rotary valve shaft, causing the rotary valve to rotate counterclockwise. The higher the lubricating oil temperature, the larger the rotation angle of the rotary valve, and the wider the valve port connected to the heat exchanger opens accordingly, allowing some lubricating oil to enter the gearbox through the plate heat exchanger 2. When the lubricating oil temperature reaches the upper limit of the temperature sensing range of the thermistor, all valve ports connected to the filter outlet are closed, and all valve ports connected to the plate heat exchanger 2 outlet are opened. At this time, all lubricating oil will be cooled by the heat exchanger before entering the gearbox. When the temperature of the lubricating oil flowing through the automatic lubricating oil temperature regulator 1 drops, the temperature-sensing element inside the thermosensitive element contracts accordingly, and the rotary valve is driven to rotate clockwise. The valve port connected to the oil outlet of the heat exchanger gradually closes, while the valve port connected to the oil outlet of the filter gradually opens. When the lubricating oil temperature drops below the temperature sensing range of the thermosensitive element, the temperature-sensing element completely contracts and recovers. Under the action of the return spring, the rotary valve returns to its initial position.

Claims

1. An internal oil supply system for a transmission gearbox with a clutch, characterized in that: It includes an automatic lubricating oil temperature regulator (1), a plate heat exchanger (2), a double oil filter (3), an electric backup oil pump (4), a gearbox oil pan (5), a shaft belt lubricating oil pump (6), an electric backup working oil pump for the clutch (7), a check valve (8), a throttling element (9), an overflow valve (10), an oil filter (11), a high-precision oil filter (12), a shaft belt clutch working oil pump (13), and a two-stage pressure regulating valve assembly (14). The output port of one end of the gearbox oil pan (5) is connected to the input end of the electric standby oil pump (4) through a pipeline. The output end of the electric standby oil pump (4) is connected to the input end of the double oil filter (3) through a pipeline. The output end of the double oil filter (3) is connected to one end of the plate heat exchanger (2) through a pipeline. The other end of the plate heat exchanger (2) is connected to one end of the automatic lubricating oil temperature regulator (1). The other end of the automatic lubricating oil temperature regulator (1) is connected to the transmission gear unit through a pipeline. The side port of the automatic lubricating oil temperature regulator (1) is connected to the plate heat exchanger (2) and the double oil filter through a pipeline. The pipe connecting the device (3) is connected to the transmission gear unit. The other end of the automatic lubricating oil temperature regulator (1) is connected to the first input port of the overflow valve (10) through a pipe. The output port of the overflow valve (10) is connected to the first input port of the gearbox oil pan (5) through a pipe. The connection between the electric standby oil pump (4) and the double oil filter (3) is connected to the second input port of the overflow valve (10) through a pipe. The output end of the electric standby oil pump (4) is connected in parallel with a throttling element (9), and the output end of the throttling element (9) is connected to the second input port of the gearbox oil pan (5) through a pipe. The output port of the gearbox oil pan (5) is connected to the input end of the shaft-driven lubricating oil pump (6) via a pipeline. The output end of the shaft-driven lubricating oil pump (6) is connected to the connection point of the double oil filter (3) and the electric backup oil pump (4) via a pipeline. The output port of the other end of the gearbox oil pan (5) is connected to the input end of the clutch electric backup working oil pump (7) via a pipeline. The output end of the clutch electric backup working oil pump (7) is connected to one end of the check valve (8). The other end of the check valve (8) is connected to one end of the oil filter (11) via a pipeline. The other end of the oil filter (11) is connected to... One end of the high-precision oil filter (12) is connected, and the other end of the high-precision oil filter (12) is connected to the input end of the secondary pressure regulating valve assembly (14) through a pipe. The first output end of the secondary pressure regulating valve assembly (14) is connected to the clutch through a pipe. The other end of the automatic lubricating oil temperature regulator (1) is connected to the transmission gear unit through a pipe and connected to the input end of the shaft belt clutch working oil pump (13). The output end of the shaft belt clutch working oil pump (13) is connected to the input end of the secondary pressure regulating valve assembly (14) through a pipe. The second output end of the secondary pressure regulating valve assembly (14) is connected to the clutch through a pipe.

2. The internal oil supply system of a transmission gearbox with a clutch according to claim 1, characterized in that: The connection between the dual oil filter (3) and the throttling element (9) is connected to the connection between the middle outlet of the gearbox oil pan (5) and the shaft-driven lubricating oil pump (6) via a pipe.

3. The internal oil supply system of a transmission gearbox with a clutch according to claim 1, characterized in that: The electric backup oil pump (4) is equipped with a check valve (8) at its input and output ends respectively.

4. The internal oil supply system of a transmission gearbox with a clutch according to claim 2, characterized in that: The shaft-driven lubricating oil pump (6) is equipped with a check valve (8) at its output end.

5. The internal oil supply system of a transmission gearbox with a clutch according to claim 1, characterized in that: The clutch electric backup oil pump (7) is equipped with a check valve (8) at its input end.

6. The internal oil supply system of a transmission gearbox with a clutch according to claim 1, characterized in that: The output end of the shaft clutch working oil pump (13) and the second output end of the secondary pressure regulating valve assembly (14) are respectively provided with a one-way valve (8).

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