CN117267358A

CN117267358A - Gear box cooling mechanism

Info

Publication number: CN117267358A
Application number: CN202311274971.0A
Authority: CN
Inventors: 职超帅; 肖家如; 王雪峰; 孙中乾; 陈明
Original assignee: Henan Tongji Reducer Co ltd
Current assignee: Henan Tongji Reducer Co ltd
Priority date: 2023-09-28
Filing date: 2023-09-28
Publication date: 2023-12-22

Abstract

The invention relates to the technical field of gear boxes, in particular to a gear box cooling mechanism, which comprises a base, wherein a gear box is placed in the base, and lubricating oil is filled in the gear box; the first sensing box is immersed in lubricating oil, the second sensing box is arranged on the base, the first connecting pipe is communicated with the first sensing box and the second sensing box, and the first sensing box, the first connecting pipe and the second sensing box are filled with liquid with good thermal expansion and cold contraction properties; the sliding block is inserted into the second sensing box in a sliding manner; the oil inlet pipeline and the adjusting pipeline are communicated with the oil inlet pipeline, the side wall of the adjusting pipeline is communicated with a first oil outlet pipe and a second oil outlet pipe, the first oil outlet pipe is connected with a first-stage cooling assembly, and the second oil outlet pipe is connected with a second-stage cooling assembly; the connecting rod is arranged in the adjusting pipeline and is connected with a first connecting block and a second connecting block; and the control piece is used for controlling the movement of the connecting rod. The invention can facilitate heat dissipation of the gear box and control the temperature in the gear box within a proper range.

Description

Gear box cooling mechanism

Technical Field

The invention relates to the technical field of gearboxes, in particular to a gearbox cooling mechanism.

Background

The lubricating oil in the gear box can not only play a role in lubricating, but also take away heat generated by friction between structures, so that the device is protected, and the damage of gears and bearings due to overhigh temperature is reduced.

The Chinese patent with the publication number of CN218326136U discloses a gearbox oil-cooled radiator, which comprises a base and a gearbox, wherein lubricating oil in the gearbox can be forcibly pumped out through a telescopic connector, a radiating pipe, a pump and a connecting hose, heat is radiated through a radiating mechanism, cooling water can be indirectly or continuously smeared on the surface of the radiating pipe through the arrangement of the radiating mechanism, the temperature can be quickly reduced through the heat absorption effect of the cooling water, and the cooling water can be quickly evaporated by being matched with the air-cooled heat radiation arrangement of fan blades, so that the heat absorption efficiency is further improved.

In view of the above-mentioned related art, the applicant believes that when the temperature in the gear box is low, the viscosity of the lubricating oil is high, and the load of the gear is increased, so that the heat generation of the gear is increased, and the service life of the gear are affected.

Disclosure of Invention

In order to facilitate heat dissipation of the gearbox and control the temperature in the gearbox within a proper range, the utility model provides a gearbox cooling mechanism.

The invention provides a gearbox cooling mechanism, which adopts the following technical scheme: the cooling mechanism of the gear box comprises a base, wherein the base is used for placing the gear box, and lubricating oil for lubricating and cooling is filled in the gear box; the first sensing box is arranged in the gear box and immersed in lubricating oil, a first connecting pipe is communicated with the first sensing box, and one end of the first connecting pipe extends out of the gear box; the first sensing box, the first connecting pipe and the second sensing box are filled with liquid with good thermal expansion and cold contraction; the sliding block is arranged at one end of the second sensing box, when the liquid in the second sensing box expands, the sliding block is driven to move in a direction away from the first connecting pipe, and when the liquid in the second sensing box contracts, the sliding block is driven to move in a direction close to the first connecting pipe; one end of the oil inlet pipeline is communicated with the inside of the gear box, and an oil pump is arranged on the oil inlet pipeline; the oil inlet pipeline is communicated with one end of the oil inlet pipeline, which is far away from the gear box, the side wall of the oil inlet pipeline is communicated with a first oil outlet pipe and a second oil outlet pipe, the first oil outlet pipe and the second oil outlet pipe are axially arranged at intervals along the adjusting pipeline, one end of the first oil outlet pipe, which is far away from the adjusting pipeline, is connected with a primary cooling component, the primary cooling component is used for cooling lubricating oil in the first oil outlet pipe and returning the lubricating oil to the gear box, one end of the second oil outlet pipe, which is far away from the adjusting pipeline, is connected with a secondary cooling component, and the secondary cooling component is used for cooling the lubricating oil in the second oil outlet pipe and returning the lubricating oil to the gear box; the connecting rod is arranged in the adjusting pipeline, the connecting rod axially extends along the adjusting pipeline, the connecting rod is slidably inserted into the adjusting pipeline, a first connecting block and a second connecting block are fixedly connected to the connecting rod, the first connecting block is matched with the end part of the first oil outlet pipe, the first connecting block seals the end part of the first oil outlet pipe, the second connecting block is matched with the end part of the second oil outlet pipe, the second connecting block seals the end part of the second oil outlet pipe, the first connecting block and the second connecting block are axially arranged at intervals along the connecting rod, and the interval between the first connecting block and the second connecting block is larger than the interval between the first oil outlet pipe and the second oil outlet pipe; the control piece is arranged between the sliding block and the connecting rod, when the sliding block moves towards the direction close to the first connecting pipe, the second connecting block is driven to seal the end part of the second oil outlet pipe through the control piece, and when the sliding block moves towards the direction away from the first connecting pipe, the first connecting block is driven to seal the end part of the first oil outlet pipe.

Through adopting above-mentioned technical scheme, first sensing case soaks in the lubricating oil in the gear box, when lubricating oil temperature changes, heat transfer gives the liquid in the first sensing case, make the liquid temperature change in first sensing case, first connecting pipe and the second sensing case and take place the thermal expansion shrinkage phenomenon, when the liquid in the second sensing case expands or contracts, change the position of adjusting the connecting rod in the pipeline through the control, lubricating oil flows into adjusting the pipeline through the oil feed pipeline in the gear box, when first connecting block seals first play oil pipe tip, lubricating oil gets into to second grade cooling module along the second play oil pipe and cools down, when second connecting block seals second play oil pipe tip, lubricating oil gets into to first grade cooling module along first play oil pipe and cools down.

Different cooling modes can be selected according to different temperatures of lubricating oil in the gear box, the conditions that the cooling effect of the lubricating oil in the gear box is insufficient or the temperature of the lubricating oil is too low are reduced, the stability of the device is improved, the service life of the device is prolonged, the gear box is conveniently cooled and protected, and the gear box is convenient to use in a linkage mode.

Optionally, the second grade cooling subassembly includes the cooling case, and lubricating oil passes through the second goes out the oil pipe and gets into in the cooling case, the oil inlet has been seted up to cooling case top, the oil-out has been seted up to cooling case bottom.

Through adopting above-mentioned technical scheme, can change the interior lubricating oil of gear box, the lubricating oil can take place the viscosity change after using a period, by the circumstances such as pollution, change lubricating oil, be convenient for lubricate and cool down the gear box is inside, reduce the work operation that influences the gear box because of the change of lubricating oil, the hoisting device stability, extension device life, and can change lubricating oil at the cooling in-process, need not the gear machine and shut down and change, the hoisting device flexibility.

Optionally, a pressure regulating valve is arranged on one side of the second sensing box far away from the sliding block, and the pressure regulating valve is used for regulating the pressure in the second sensing box.

Through adopting above-mentioned technical scheme, can adjust the pressure in the second sensing case through the pressure regulating valve, thereby adjust the position of second sensing incasement sliding block, further change the walking passageway of lubricating oil, adjust the pressure regulating valve, make the sliding block remove towards the direction that is close to first connecting pipe, drive second connecting block and seal second oil outlet pipe tip, make lubricating oil get back to in the gear box after first oil outlet pipe process and cooling down the subassembly cooling, second oil outlet pipe and cooling down the case and be in the state of shutting down this moment, open the oil inlet and the oil-out of cooling down the case, be convenient for change the lubricating oil in the cooling down the case, further hoisting device's flexibility, hoisting device's stability reduces the excessive circumstances of lubricating oil discharge in the change process, reduce the influence of oil change process to the lubricating oil volume in the gear box.

Optionally, be equipped with the connecting plate on the base, the connecting plate is vertical to be set up, be equipped with on the gear box and be used for the drive the input shaft of gear box work, be connected with first belt pulley on the input shaft, be connected with the second belt pulley on the connecting plate, first belt pulley with the cover is equipped with first belt body on the second belt pulley, the second belt pulley connect in the oil-well pump, the second belt pulley drives during rotation the oil-well pump work.

Through adopting above-mentioned technical scheme, through setting up first belt pulley, second belt pulley and first belt body, make the input shaft on the gear box drive the oil-well pump work, need not to set up the power supply additionally and be used for extracting the lubricating oil in the gear box, save the cost, facilitate the use.

Optionally, a third belt pulley, a fourth belt pulley and a second belt body are arranged on the connecting plate, the third belt pulley is connected with the second belt pulley, and the second belt body is sleeved on the third belt pulley and the fourth belt pulley; the second sensing box is horizontally arranged and connected with the connecting plate, the sliding block is arranged at one end, close to the connecting plate, of the second sensing box, the first connecting pipe is arranged at one side, far away from the connecting plate, of the sliding block, a connecting shaft which is horizontally arranged is arranged on the connecting plate, the connecting shaft penetrates through the connecting plate along the width direction of the connecting plate, the connecting shaft is slidably connected with the connecting plate, the connecting shaft is rotationally connected with the connecting plate, a fourth belt pulley is connected with one side, close to the second sensing box, of the connecting plate, a connecting groove is formed in the fourth belt pulley, axially extends along the fourth belt pulley, is slidably inserted into the connecting groove, is rotationally connected with the connecting groove, is provided with an opening, is arranged at one side, close to the connecting plate, of the sliding block, penetrates through the opening and is fixedly connected with the connecting plate, is connected with one side, far away from the first connecting block, of the connecting block, is connected with the first spline sleeve, and is connected with the first spline sleeve; the second grade cooling subassembly includes first water tank and water pump, first water tank is located on the base, the water pump is located in the first water tank, first water tank is located the connecting plate is kept away from one side of second sensing case, the connecting axle keep away from one side of sliding block be connected in the water pump, be equipped with outlet pipe and wet return on the first water tank, the control includes second connecting pipe and third connecting block, outlet pipe one end communicate in first water tank, the outlet pipe mid portion is located cooling incasement portion, second connecting pipe one end communicate in the outlet pipe, the second connecting pipe other end communicate in adjusting pipeline, wet return one end communicate in second connecting pipe lateral wall, the wet return other end communicates in first water tank, connecting rod one end pass adjusting pipeline and stretch into to in the second connecting pipe, third connecting block fixed connection in the connecting rod is located one end in the second connecting pipe, the third connecting block with the wet return is connected with the tip, the third connecting block be close to first connecting pipe one side be close to the second connecting pipe with the second connecting pipe is close to the adjusting pipeline one side is equipped with the adjusting spring.

Through adopting above-mentioned technical scheme, through setting up third belt pulley, fourth belt pulley and second belt body, the input shaft drives the second belt pulley and rotates, drives fourth belt pulley through the second belt body and rotates, realizes the transmission, reduces the setting of power supply, stable in structure, convenient to use, saves the cost.

When the temperature rises, liquid in the first sensing box, the first connecting pipe and the second sensing box is heated and expanded, the sliding block is extruded, the sliding block moves in the direction away from the first connecting pipe, namely, the first spline connecting block is driven to move in the direction close to the connecting plate, when the first spline connecting block is connected with the second spline connecting block, the rotation of the fourth belt pulley is transmitted to the sliding block, the connecting shaft is driven to rotate, the connecting shaft rotates, the water pump is driven to start working, water in the first water tank flows into the water outlet pipe, lubricating oil in the cooling box is cooled when passing through the cooling box, the cooling effect is improved, water in the water outlet pipe flows into the second connecting pipe after flowing into the first connecting pipe, the water flow extrudes and impacts the third connecting block, the third connecting block moves in the direction away from the first connecting pipe, the connecting shaft is driven to move in the direction away from the first connecting pipe, the first connecting block is driven to seal the first oil outlet pipe, and the lubricating oil in the adjusting pipe flows into the second oil outlet pipe.

When the temperature reduces, liquid in the second sensing box contracts, the sliding block is attracted to move in the direction away from the connecting plate, the first spline connecting block is separated from the second spline connecting block, the fourth belt pulley rotates, the connecting shaft is still, the water pump stops working, the third connecting block moves in the direction close to the first connecting pipe under the action of the reset spring, the second connecting block is driven to seal the first oil outlet pipe, and lubricating oil in the adjusting pipeline flows to the first oil outlet pipe.

The devices are matched with each other, so that the running path of the lubricating oil is regulated through the temperature change of the lubricating oil in the gear box, and the device is convenient to use.

Optionally, be equipped with axis of rotation, auger blade, driving fan and third belt body in the cooling tank, second go out oil pipe one end intercommunication in cooling tank is inside, second go out oil pipe end connection in cooling tank lateral wall top, the second go out oil pipe be close to cooling tank's one end extends along the horizontal direction, cooling tank inside roof is connected with the installation piece, installation piece inside cavity and communicate in second goes out oil pipe, driving fan vertically sets up, driving fan rotate set up in installation piece is inside, second goes out oil pipe end orientation driving fan, the through-hole has been seted up to the installation piece bottom, the installation piece keep away from one side of second goes out oil pipe is connected with the fifth belt pulley, driving fan connect in the fifth belt pulley, the axis of rotation level set up and rotate connect in cooling tank bottom, fixedly connected with sixth belt pulley in the axis of rotation, third belt body cover is located the fifth belt pulley with sixth belt pulley, auger blade connect in the axis of rotation lateral wall, the axis of rotation fan, the through-hole has been seted up to the installation piece bottom, the oil-out oil outlet is located respectively to the both ends, cooling tank bottom and cooling tank bottom.

Through adopting above-mentioned technical scheme, the lubricating oil in the gear box contains more impurity after using a period, influences the use of gear box, and impurity piles up in the cooling incasement, influences the use of device, sets up auger blade in the cooling incasement, pushes away impurity to the position that is close to the oil-out, when changing cooling incasement lubricating oil, dashes out the cooling case with impurity, hoisting device's stability, extension device life.

The driving fan is arranged, lubricating oil flows to the cooling box through the second oil outlet pipe, the lubricating oil flushes fan blades of the driving fan to drive the driving fan to rotate, the fifth belt pulley and the sixth belt pulley are driven to rotate, the driving rotating shaft rotates, the auger blade pushes impurities in the cooling box to a position close to the oil outlet, the setting of a power source is reduced, the cost is saved, and the cooling box is convenient to use.

Optionally, the second grade cooling subassembly still includes cooling fan, cooling fan set up in on the base, cooling fan locates first water tank is close to one side of connecting plate, cooling fan connect in the connecting axle, cooling fan towards first water tank direction is bloied.

Through adopting above-mentioned technical scheme, set up cooling fan, cool down to the water in the first water tank, be convenient for cool down to the lubricating oil in the cooling tank through rivers, promote cooling effect, the water cyclic utilization in the first water tank of being convenient for reduces the water waste.

Optionally, the one-level cooling subassembly includes first time oil pipe, first time oil pipe one end connect in first time oil pipe, cooling tank lateral wall intercommunication has the second to return oil pipe, gear box top intercommunication has the third connecting pipe, first time oil pipe keep away from first time oil pipe's one end communicate in the third connecting pipe, the second returns oil pipe keep away from cooling tank's one end communicate in the third connecting pipe, the second returns oil pipe to be close to the one end of third connecting pipe is equipped with the check valve.

By adopting the technical scheme, the first oil return pipe is used for carrying out primary cooling on the lubricating oil, so that the condition that the viscosity is increased due to too low lubricating oil temperature caused by too much cooling is reduced, the stability and the flexibility of the device are improved, and the device is convenient to use; the third connecting pipe is arranged, the first oil return pipe and the second oil return pipe are both communicated with the third connecting pipe, the first oil return pipe and the second oil return pipe flow into the gear box through the third connecting pipe, the opening on the gear box is reduced, the stability of the device is improved, the leakage is reduced, the one-way valve is arranged, and the stability of the device is further improved.

In summary, the invention has the following beneficial technical effects:

1. different cooling modes can be selected according to different temperatures of lubricating oil in the gear box, the conditions that the cooling effect of the lubricating oil in the gear box is insufficient or the temperature of the lubricating oil is too low are reduced, the stability of the device is improved, the service life of the device is prolonged, and the gear box is convenient to cool and protect.

2. Can adjust the cooling mode to lubricating oil through the pressure regulating valve, the hoisting device flexibility is convenient for change the lubricating oil in the cooling case, reduces the adverse effect that the reduction of lubricating oil caused in the gear box in the change process.

3. The device has the advantages that the lubricating oil is replaced, the stability of the device is improved, adverse effects on the inside of the gear box due to the change of the property of the lubricating oil are reduced, the service life of the device is prolonged, impurities in the lubricating oil can be cleaned, and the stability of the device is further improved.

4. The water pump, the cooling fan and the second sensing box are linked, when the cooling mode of lubricating oil is changed into secondary cooling, the water pump and the cooling fan start to work, waste is reduced, and energy is saved.

5. The auger blade is arranged, a power source is not required to be additionally arranged, impurities in the cooling box are conveniently pushed to a position close to the oil outlet, the impurities are conveniently discharged, and the stability of the device is improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

FIG. 2 is a schematic diagram of the overall structure of a temperature sensing assembly and a secondary cooling assembly according to an embodiment of the present invention;

FIG. 3 is a schematic view showing the overall structure of the temperature sensing assembly and the adjusting member according to the embodiment of the invention;

FIG. 4 is a cross-sectional view of a second sensor housing and a fourth pulley in an embodiment of the invention;

FIG. 5 is a cross-sectional view of the tuning conduit and the second connecting tube in an embodiment of the invention;

FIG. 6 is a schematic view of the overall structure of the control member and the secondary cooling assembly in an embodiment of the present invention;

FIG. 7 is a cross-sectional view of a cooling box in an embodiment of the invention;

fig. 8 is a cross-sectional view of a drive fan and a third belt body in an embodiment of the present invention.

Reference numerals illustrate: 1. a base; 2. a gear box; 201. an input shaft; 202. an oil inlet pipe; 203. an oil pump; 204. a first pulley; 205. a second pulley; 206. a first belt body; 3. a temperature sensing component; 301. a first sensor box; 302. a first connection pipe; 303. a second sensor box; 304. a pressure regulating valve; 4. a control member; 401. a connecting shaft; 402. a first spline connection block; 403. a second spline connection block; 404. a third pulley; 405. a fourth pulley; 406. a second belt body; 407. a connecting groove; 408. an opening; 409. a pressure spring; 410. a second connection pipe; 5. an adjusting member; 501. a sliding block; 502. adjusting the pipeline; 503. a connecting rod; 6. a primary cooling component; 601. a first flowline; 602. a first oil return pipe; 7. a secondary cooling component; 701. a second oil outlet pipe; 702. a first water tank; 703. a water pump; 704. a water outlet pipe; 705. a water return pipe; 706. a cooling box; 707. a second oil return pipe; 708. a cooling fan; 709. a seventh pulley; 710. an eighth pulley; 711. a fourth belt body; 712. a second water tank; 713. an oil inlet; 714. an oil outlet; 8. a connecting plate; 9. a first connection block; 10. a second connection block; 11. a third connecting block; 12. a return spring; 13. a third connection pipe; 131. a one-way valve; 14. a rotating shaft; 141. auger blades; 142. driving a fan; 143. a third belt body; 144. a mounting block; 145. a through hole; 146. a fifth pulley; 147. and a sixth pulley.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the invention, fall within the scope of protection of the invention.

The invention is described in further detail below with reference to fig. 1-8.

The embodiment of the invention discloses a gearbox cooling mechanism. As shown in fig. 1 to 8, a gearbox cooling mechanism comprises a base 1, a temperature sensing assembly 3, a control member 4, an adjusting member 5, a primary cooling assembly 6 and a secondary cooling assembly 7.

As shown in fig. 1, the whole base 1 is cuboid, and base 1 is used for placing devices such as gear box 2, and gear box 2 intussuseption is filled with lubricating oil, and lubricating oil is used for lubricating and cooling the inside of gear box 2, guarantees the normal operating of device, and the life of extension device reduces the damage that the part such as gear box internal gear temperature is too high caused to the device, sets up base 1, convenient to use, and the installation and fixation of being convenient for are provided with connecting plate 8 on the base 1, and connecting plate 8 wholly is cuboid form, and connecting plate 8 is vertical to be set up, is convenient for install and fix other devices.

As shown in fig. 2 and 3, the temperature sensing assembly 3 includes a first sensing box 301, a first connecting pipe 302 and a second sensing box 303, the first sensing box 301 is disposed inside the gear box 2, the first sensing box 301 is immersed in the lubricating oil in the gear box 2, the second sensing box 303 is connected to the connecting plate 8, two ends of the first connecting pipe 302 are respectively connected to the first sensing box 301 and the second sensing box 303, the first sensing box 301 is made of a material with good heat conduction performance, liquids with good thermal expansion and contraction properties, such as kerosene, alcohol and the like, are filled in the first sensing box 301, the first connecting pipe 302 and the second sensing box 303, when the temperature of the lubricating oil in the gear box 2 changes, the heat is transferred to the liquid in the first sensing box 301 through the side wall of the first sensing box 301, and influences the liquid in the first connecting pipe 302 and the second sensing box 303, so that the liquid in the first sensing box 301, the first connecting pipe 302 and the second sensing box 303 generate thermal expansion and contraction phenomena.

As shown in fig. 2 and fig. 3, an input shaft 201 for driving the gear box 2 to work is arranged on the gear box 2, one end of the input shaft 201 extends out of the side wall of the gear box 2, an oil inlet pipeline 202 is communicated with the bottom of the gear box 2, an oil pump 203 is arranged on the oil inlet pipeline 202, lubricating oil in the gear box 2 is pumped into the oil inlet pipeline 202, a first belt pulley 204 is connected to the side wall of the gear box 2, a second belt pulley 205 is connected to a connecting plate 8, a first belt pulley body 206 is sleeved on the first belt pulley 204 and the second belt pulley 205, the second belt pulley 205 is connected to the oil pump 203, the input shaft 201 rotates to drive the first belt pulley 204 to rotate, the second belt pulley 205 is driven to rotate by the first belt pulley body 206, the oil pump 203 starts to work, no additional power source is needed to drive the oil pump 203 to work, cost is saved, after the gear box 2 starts to work, the lubricating oil in the gear pump 203 starts to be cooled, the working time of the oil pump 203 is convenient to control, the working time of the oil pump 203 is not needed to be started to be cooled, the second belt pulley 205 is convenient to use, and the workload of workers is reduced.

As shown in fig. 3 and 5, the adjusting member 5 includes a sliding block 501, an adjusting pipe 502 and a connecting rod 503, the adjusting pipe 502 is horizontally disposed and connected to the connecting plate 8, one end of the oil inlet pipe 202 away from the gear case 2 is connected to the bottom wall of the adjusting pipe 502 and is communicated with the inside of the adjusting pipe 502, and the connecting rod 503 is horizontally disposed in the adjusting pipe 502.

As shown in fig. 3 and 4, the sliding block 501 is disposed in the second sensing box 303, the sliding block 501 is slidably inserted into the inner wall of the second sensing box 303, the sliding block 501 is disposed at one end of the second sensing box 303 close to the connecting plate 8, and the first connecting pipe 302 is disposed at one end of the sliding block 501 far away from the connecting plate 8.

As shown in fig. 2 and 4, the control member 4 comprises a connecting shaft 401, a first spline connecting block 402 and a second spline connecting block 403, a third belt pulley 404 and a fourth belt pulley 405 are connected to the connecting plate 8, the third belt pulley 404 is connected to the second belt pulley 205, when the second belt pulley 205 rotates, the third belt pulley 404 synchronously rotates with the second belt pulley 205, the fourth belt pulley 405 is connected to the connecting plate 8, the fourth belt pulley 405 is arranged at one side of the connecting plate 8 near the second sensing box 303, a second belt body 406 is sleeved on the third belt pulley 404 and the fourth belt pulley 405 to drive the fourth belt pulley 405 to rotate, the connecting shaft 401 is horizontally arranged and connected to the connecting plate 8, the connecting shaft 401 penetrates through the connecting plate 8 along the width direction of the connecting plate 8, two ends of the connecting shaft 401 are respectively arranged at two opposite sides of the connecting plate 8, the connecting shaft 401 is slidingly connected to the connecting plate 8, the connecting shaft 401 is rotationally connected to the connecting plate 8, the fourth belt pulley 405 is provided with a connecting slot 407, the connecting slot 407 penetrates through the fourth belt pulley 405 along the circumferential direction of the fourth belt pulley 405, one end of the connecting shaft 401 penetrates through the connecting slot 407, the connecting shaft 401 is connected with the connecting slot 407 in a sliding way, the connecting shaft 401 is connected with the connecting slot 407 in a rotating way, one side of the second sensing box 303 close to the connecting plate 8 is provided with an opening 408, the sliding block 501 seals the opening 408, one end of the connecting shaft 401 penetrates through the sliding slot and the opening 408 and is connected with the sliding block 501, the first spline connecting block 402 is arranged on one side of the sliding block 501 close to the connecting plate 8, the first spline connecting block 402 is sleeved on the connecting shaft 401, a pressure spring 409 is arranged between the first spline connecting block 402 and the sliding block 501, the second spline connecting block 403 is connected on one side of the fourth belt pulley 405 far away from the connecting plate 8, the second spline connecting block 403 is connected in the opening 408 in a sliding way, the first spline connection block 402 and the second spline connection block 403 cooperate.

As shown in fig. 2 and 4, the fourth pulley 405 rotates with the third pulley 404, when the temperature of the lubricating oil in the gear box 2 changes, which affects the pressure of the liquid in the second sensor box 303, the sliding block 501 is driven to move in a direction approaching or separating from the connecting plate 8, when the first spline connecting block 402 and the second spline connecting block 403 are attached, the connecting shaft 401 rotates with the rotation of the fourth pulley 405, and when the first spline connecting block 402 and the second spline connecting block 403 are separated, the fourth pulley 405 rotates around the connecting shaft 401, and the connecting shaft 401 is in a stationary state.

As shown in fig. 2 and fig. 3, the first-stage cooling assembly 6 includes a first oil outlet pipe 601 and a first oil return pipe 602, one end of the first oil outlet pipe 601 is communicated with the adjusting pipe 502, the first oil outlet pipe 601 and the oil inlet pipe 202 are respectively arranged on two opposite sides of the adjusting pipe 502, the other end of the first oil outlet pipe 601 is communicated with one end of the first oil return pipe 602, the other end of the first oil return pipe 602 is communicated with the top of the gear box 2, and lubricating oil in the gear box 2 enters the first oil return pipe 602 through the first oil outlet pipe 601 to perform first-stage cooling, and is conveyed into the gear box 2 after cooling.

As shown in fig. 2 and 3, the secondary cooling assembly 7 includes a second oil outlet pipe 701, a first water tank 702, a water pump 703, a water outlet pipe 704, a water return pipe 705, a cooling tank 706, a second oil return pipe 707 and a cooling fan 708, one end of the second oil outlet pipe 701 is communicated with the adjusting pipe 502, the other end of the second oil outlet pipe 701 is communicated with the cooling tank 706, and two ends of the second oil return pipe 707 are respectively communicated with the cooling tank 706 and the gear box 2.

As shown in fig. 6, an oil inlet 713 is formed at the top of the cooling tank 706, an oil outlet 714 is formed at the bottom of the side wall of the cooling tank 706, and valves (not shown in the figure) are respectively arranged at the oil inlet 713 and the oil outlet 714.

As shown in fig. 2, the gear case 2 is communicated with a third connecting pipe 13, one end of the first oil return pipe 602, which is far away from the first oil outlet pipe 601, is communicated with the third connecting pipe 13, one end of the second oil return pipe 707, which is far away from the cooling tank 706, is communicated with the third connecting pipe 13, one end of the second oil return pipe 707, which is near to the third connecting pipe 13, is provided with a one-way valve 131, and lubricating oil cannot flow along the connecting pipe to the second oil return pipe 707.

As shown in fig. 6 and fig. 7, the first water tank 702 is disposed on the base 1, the second sensing box 303 and the first water tank 702 are disposed on two opposite sides of the connecting plate 8 respectively, the water pump 703 is disposed in the first water tank 702, one side of the connecting shaft 401 far away from the sliding block 501 is connected with a seventh belt pulley 709, an eighth belt pulley 710 is connected to the first water tank 702, the eighth belt pulley 710 is connected with the water pump 703, a fourth belt pulley body 711 is sleeved on the seventh belt pulley 709 and the eighth belt pulley 710, the cooling fan 708 is disposed on the base 1, the cooling fan 708 is disposed on one side of the first water tank 702 close to the connecting plate 8, the cooling fan 708 is connected to the eighth belt pulley 710, the cooling fan 708 blows air towards the first water tank 702, when the connecting shaft 401 rotates, the seventh belt pulley 709 is driven to rotate, the eighth belt pulley 710 is driven to rotate by the fourth belt pulley body 711, thereby driving the water pump 703 and the cooling fan 708 to start working, one end of the water outlet pipe 704 is communicated with the bottom of the first water tank 702, the water outlet pipe 704 extends into the cooling box 706 from the bottom of the side wall 706 and is S-shaped, the water outlet pipe 704 extends from the top of the side of the box 706, the cooling fan 708 is connected to one side of the second sensing box 303 far away from the second water tank 702, which is connected to the first water tank 702, the cooling effect is beneficial to cooling by cooling water cooling by the cooling effect of the cooling by the cooling water in the first water tank 702, and is communicated with the cooling effect of cooling water tank 702, which is cooled by the cooling effect of cooling water by the cooling effect of the cooling water flowing in the water tank 702.

As shown in fig. 5 and 6, the control member 4 further includes a second connection pipe 410 and a third connection block 11, one end of the second connection pipe 410 is connected to the second water tank 712, the other end of the second connection pipe 410 is connected to the adjusting pipe 502, one end of the return pipe 705 is connected to the side wall of the second connection pipe 410, and the other end of the return pipe 705 is connected to the first water tank 702.

As shown in fig. 5, the second oil outlet pipe 701 and the oil inlet pipe 202 are respectively disposed on two opposite sides of the adjusting pipe 502, the first oil outlet pipe 601 and the second oil outlet pipe 701 are disposed at intervals, and the first oil outlet pipe 601 is disposed on one side of the second oil outlet pipe 701 close to the second connecting pipe 410.

As shown in fig. 5, one end of the connecting rod 503 passes through the adjusting pipe 502 and extends into the second connecting pipe 410, the part of the connecting rod 503 located in the adjusting pipe 502 is connected with the first connecting block 9 and the second connecting block 10, the first connecting block 9 is matched with the end of the first oil outlet pipe 601, the first oil outlet pipe 601 can be closed, the second connecting block 10 is matched with the end of the second oil outlet pipe 701, the end of the second oil outlet pipe 701 can be closed by the second connecting block 10, the first connecting block 9 and the second connecting block 10 are arranged at intervals, the first connecting block 9 is arranged on one side, close to the second connecting pipe 410, of the second connecting block 10, and the interval between the first connecting block 9 and the second connecting block 10 is larger than the interval between the first oil outlet pipe 601 and the second oil outlet pipe 701.

As shown in fig. 3 and 5, the third connection block 11 is connected to the portion of the connection rod 503 located in the second connection pipe 410, the third connection block 11 is matched with the return pipe 705, the third connection block 11 can seal the end of the return pipe 705, a return spring 12 is arranged between the side wall of the third connection block 11 close to the first connection block 9 and the side wall of the adjusting pipe 502 close to the second connection pipe 410, when the return spring 12 is in the original length, the third connection block 11 seals the end of the return pipe 705, and the second connection block 10 seals the end of the second oil outlet pipe 701.

As shown in fig. 5 and fig. 6, when the connecting shaft 401 starts to rotate, the water pump 703 is driven to operate, water flows into the second connecting pipe 410 through the second water tank 712, and extrudes the third connecting block 11, so that the third connecting block 11 moves towards the direction close to the adjusting pipe 502, and drives the first connecting block 9 to seal the end of the first oil outlet pipe 601, at this time, the second connecting block 10 is separated from the second oil outlet pipe 701, the second connecting block 10 is located at one side of the second oil outlet pipe 701 away from the first oil outlet pipe 601, and lubricating oil in the oil inlet pipe 202 flows into the second oil outlet pipe 701 through the adjusting pipe 502 and enters into the cooling tank 706 for secondary cooling.

As shown in fig. 7 and 8, a rotating shaft 14, auger blades 141, a driving fan 142 and a third belt body 143 are disposed in the cooling tank 706, one end of the second oil outlet pipe 701 is communicated with the inside of the cooling tank 706, the end of the second oil outlet pipe 701 is connected to the top of the cooling tank 706, one end of the second oil outlet pipe 701, which is close to the cooling tank 706, extends along the horizontal direction, the top wall of the inside of the cooling tank 706 is connected with a mounting block 144, the inside of the mounting block 144 is hollow and communicated with the second oil outlet pipe 701, the driving fan 142 is vertically disposed, the driving fan 142 is rotationally disposed in the inside of the mounting block 144, the end of the second oil outlet pipe 701 faces the driving fan 142, a through hole 145 is formed in the bottom of the mounting block 144, one side of the mounting block 144 is connected with a fifth belt pulley 146, the driving fan 142 is connected to the fifth belt pulley 146, the rotating shaft 14 is horizontally disposed and rotationally disposed at the bottom of the cooling tank 706, a sixth belt 147 is fixedly connected to the rotating shaft 14, the third belt body 143 is sleeved on the fifth belt 146 and the sixth belt pulley 147, the auger blades 141 are connected to the side wall of the cooling tank 706, the 714 and the oil outlet 714 is respectively disposed at the bottom of the rotating shaft 14, and the sixth belt 147 are respectively disposed at the two ends of the rotating shaft 14, when the rotating shaft 14 is rotationally pushed by the rotating shaft 142, and the lubricating oil is moved towards the inside of the cooling tank 706.

The embodiment of the invention relates to a gear box cooling mechanism, which comprises the following implementation principle: after the gear box 2 works, the temperature of the lubricating oil in the gear box 2 changes to influence the temperature of the liquid in the first sensing box 301, the first sensing box 301 is communicated with the second sensing box 303, and the liquid in the first sensing box 301 and the liquid in the second sensing box 303 expand with heat and contract with cold.

When the gear box 2 works, the input shaft 201 rotates to drive the first belt pulley 204 and the second belt pulley 205 to rotate, the oil pump 203 starts to work, and lubricating oil flows into the adjusting pipeline 502 from the inside of the gear box 2 along the oil inlet pipeline 202.

When the temperature of the lubricating oil in the gear box 2 is higher, the liquid in the second sensing box 303 expands and extrudes the sliding block 501, so that the sliding block 501 moves towards the direction close to the connecting plate 8, the first spline connecting block 402 is attached to the second spline connecting block 403, the rotation of the fourth belt pulley 405 is transmitted to the connecting shaft 401, the fourth belt pulley 405 drives the connecting shaft 401 to rotate, the water pump 703 and the cooling fan 708 start to work, the water in the first water tank 702 flows into the second water tank 712 along the water outlet pipe 704, then flows into the second connecting pipe 410, the water flow extrudes the third connecting block 11, the third connecting block 11 moves towards the direction close to the adjusting pipeline 502, the third connecting block 11 is separated from the water return pipe 705, the water flow flows back into the first water tank 702 along the water return pipe 705, and the cooling fan 708 cools the water in the first water tank 702.

The third connecting block 11 moves towards the direction close to the adjusting pipeline 502, namely, the connecting rod 503 moves to drive the first connecting block 9 to seal the end part of the first oil outlet pipe 601, the second connecting block 10 is separated from the second oil outlet pipe 701, lubricating oil in the adjusting pipeline 502 flows to the cooling box 706 along the second oil outlet pipe 701, the lubricating oil in the second oil outlet pipe 701 impacts the blades of the driving fan 142 and flows into the cooling box 706 from the through holes 145 at the bottom of the mounting block 144, the driving fan 142 is driven to rotate, the rotating shaft 14 is driven to rotate through the transmission of the fifth belt pulley 146 and the sixth belt pulley 147, the auger blade 141 pushes impurities deposited at the bottom of the cooling box 706 to a position close to the oil outlet 714, the water flow in the water outlet pipe 704 cools the lubricating oil in the cooling box 706, and the cooled lubricating oil flows to the third connecting pipe 13 along the second oil return pipe 707 at the bottom of the side wall of the cooling box 706 and flows into the gear box 2.

When the temperature of the lubricating oil in the gear box 2 is lower, the liquid in the second sensing box 303 contracts, attractive force is generated to the sliding block 501, the sliding block 501 is attracted to move in the direction away from the connecting plate 8, the first spline connecting block 402 is separated from the second spline connecting block 403, the fourth belt pulley 405 rotates around the connecting shaft 401, the connecting shaft 401 is in a static state, the water pump 703 and the cooling fan 708 stop working, the third connecting block 11 moves in the direction away from the adjusting pipeline 502 under the action of the reset spring 12, the second connecting block 10 is driven to seal the second oil outlet pipe 701, the first connecting block 9 is separated from the first oil outlet pipe 601, the first connecting block 9 is positioned on the side, away from the second connecting block 10, of the first oil outlet pipe 601, the lubricating oil in the adjusting pipeline 502 flows into the first oil return pipe 602 along the first oil outlet pipe 601 after primary cooling, and flows into the gear box 2.

When the lubricating oil needs to be replaced, the pressure in the second sensing box 303 is changed by adjusting the pressure regulating valve 304, so that the first spline connecting block 402 and the second spline connecting block 403 are in a separated state, the connecting shaft 401 stops rotating, the water pump 703 and the cooling fan 708 stop working, impurities and lubricating oil at the bottom of the cooling box 706 can be discharged by opening the oil outlet 714 at the bottom of the cooling box 706, new lubricating oil can be added into the cooling box 706 by opening the oil inlet 713 at the top of the cooling box 706, the pressure regulating valve 304 is adjusted again, the first spline connecting block 402 is attached to the second spline connecting block 403, the connecting shaft 401 rotates, the water pump 703 works, the lubricating oil flows into the cooling box 706 along the second oil outlet pipe 701, and the newly added lubricating oil in the cooling box 706 flows into the gear box 2.

Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims

1. A gearbox cooling mechanism, comprising:

the base (1) is used for placing the gear box (2), and lubricating oil for lubricating and cooling is filled in the gear box (2);

the first sensing box (301) is arranged in the gear box (2) and immersed in lubricating oil, a first connecting pipe (302) is communicated with the first sensing box (301), and one end of the first connecting pipe (302) extends out of the gear box (2);

the second sensing box (303) is arranged on the base (1), the first connecting pipe (302) is communicated with one side of the second sensing box (303), and liquid with good thermal expansion and cold contraction properties is filled in the first sensing box (301), the first connecting pipe (302) and the second sensing box (303);

the sliding block (501) is arranged at one end of the second sensing box (303), when the liquid in the second sensing box (303) expands, the sliding block (501) is driven to move in a direction away from the first connecting pipe (302), and when the liquid in the second sensing box (303) contracts, the sliding block (501) is driven to move in a direction close to the first connecting pipe (302);

An oil inlet pipeline (202), one end of which is communicated with the inside of the gear box (2), wherein an oil pump (203) is arranged on the oil inlet pipeline (202);

the oil inlet pipeline (202) is communicated with one end of the oil inlet pipeline (202) away from the gear box (2), a first oil outlet pipe (601) and a second oil outlet pipe (701) are communicated with the side wall of the oil inlet pipeline (502), the first oil outlet pipe (601) and the second oil outlet pipe (701) are axially arranged at intervals along the oil inlet pipeline (502), one end of the first oil outlet pipe (601) away from the oil inlet pipeline (502) is connected with a primary cooling component (6), the primary cooling component (6) is used for cooling lubricating oil in the first oil outlet pipe (601) and returning the lubricating oil to the gear box (2), and one end of the second oil outlet pipe (701) away from the oil inlet pipeline (502) is connected with a secondary cooling component (7), and the secondary cooling component (7) is used for cooling the lubricating oil in the second oil outlet pipe (701) and returning the lubricating oil to the gear box (2);

the connecting rod (503) is arranged in the adjusting pipeline (502), the connecting rod (503) axially extends along the adjusting pipeline (502), the connecting rod (503) is slidably inserted into the adjusting pipeline (502), a first connecting block (9) and a second connecting block (10) are fixedly connected to the connecting rod (503), the first connecting block (9) is matched with the end part of the first oil outlet pipe (601), the first connecting block (9) is used for sealing the end part of the first oil outlet pipe (601), the second connecting block (10) is matched with the end part of the second oil outlet pipe (701), the second connecting block (10) is used for sealing the end part of the second oil outlet pipe (701), the first connecting block (9) and the second connecting block (10) are axially arranged at intervals along the connecting rod (503), and the interval between the first connecting block (9) and the second connecting block (10) is larger than the interval between the first oil outlet pipe (601) and the second oil outlet pipe (701).

Control piece (4), locate sliding block (501) with between connecting rod (503), sliding block (501) is towards being close to when first connecting pipe (302) direction removes, through control piece (4), drive second connecting block (10) seal second goes out oil pipe (701) tip, sliding block (501) is towards keeping away from when first connecting pipe (302) direction removes, drive first connecting block (9) seal first play oil pipe (601) tip.

2. A gearbox cooling mechanism as set forth in claim 1, wherein: the second-level cooling assembly (7) comprises a cooling box (706), lubricating oil enters the cooling box (706) through a second oil outlet pipe (701), an oil inlet (713) is formed in the top of the cooling box (706), and an oil outlet (714) is formed in the bottom of the cooling box (706).

3. A gearbox cooling mechanism as set forth in claim 2, wherein: and a pressure regulating valve (304) is arranged on one side of the second sensing box (303) away from the sliding block (501), and the pressure regulating valve (304) is used for regulating the pressure in the second sensing box (303).

4. A gearbox cooling mechanism according to claim 3 wherein: be equipped with connecting plate (8) on base (1), connecting plate (8) are vertical to be set up, be equipped with on gear box (2) and be used for the drive input shaft (201) of gear box (2) work, be connected with first belt pulley (204) on input shaft (201), be connected with second belt pulley (205) on connecting plate (8), first belt pulley (204) with the cover is equipped with first belt body (206) on second belt pulley (205), second belt pulley (205) connect in oil-well pump (203), second belt pulley (205) drive when rotating oil-well pump (203) work.

5. A gearbox cooling mechanism as set forth in claim 4, wherein: a third belt pulley (404), a fourth belt pulley (405) and a second belt body (406) are arranged on the connecting plate (8), the third belt pulley (404) is connected with the second belt pulley (205), and the second belt body (406) is sleeved on the third belt pulley (404) and the fourth belt pulley (405);

the second sensing box (303) is horizontally arranged and connected with the connecting plate (8), the sliding block (501) is arranged at one end of the second sensing box (303) close to the connecting plate (8), the first connecting pipe (302) is arranged at one side of the sliding block (501) far away from the connecting plate (8), a connecting shaft (401) horizontally arranged is arranged on the connecting plate (8), the connecting shaft (401) penetrates through the connecting plate (8) along the width direction of the connecting plate (8), the connecting shaft (401) is in sliding connection with the connecting plate (8), the connecting shaft (401) is in rotating connection with the connecting plate (8), the fourth belt pulley (405) is connected with one side of the connecting plate (8) close to the second sensing box (303), a connecting groove (407) is formed in the fourth belt pulley (405), the connecting groove (407) extends along the axial direction of the fourth belt pulley (405), the connecting shaft (401) is in sliding connection with the connecting groove (407), the connecting shaft (401) is in sliding connection with the connecting shaft (8) in the width direction, the connecting shaft (401) is in rotating connection with the connecting shaft (405) and is in rotating connection with the connecting shaft (401) and is in the opening of the connecting shaft (401) close to the connecting plate (408), one end of the connecting shaft (401) penetrates through the opening (408) and is fixedly connected with the sliding block (501), one side, away from the first connecting pipe (302), of the sliding block (501) is connected with a first spline connecting block (402), the first spline connecting block (402) is sleeved on the connecting shaft (401), one side, close to the second sensing box (303), of the fourth belt pulley (405) is connected with a second spline connecting block (403), the second spline connecting block (403) is slidably inserted into the opening (408), and the first spline connecting block (402) is matched with the second spline connecting block (403);

The second-stage cooling component (7) comprises a first water tank (702) and a water pump (703), the first water tank (702) is arranged on the base (1), the water pump (703) is arranged in the first water tank (702), the first water tank (702) is arranged on one side, far away from the second sensing box (303), of the connecting plate (8), one side, far away from the sliding block (501), of the connecting shaft (401) is connected with the water pump (703), a water outlet pipe (704) and a water return pipe (705) are arranged on the first water tank (702), the control piece (4) comprises a second connecting pipe (410) and a third connecting block (11), one end of the water outlet pipe (704) is communicated with the first water tank (702), the middle part of the water outlet pipe (704) is arranged inside the cooling box (706), one end of the second connecting pipe (410) is communicated with the water outlet pipe (704), the other end of the second connecting pipe (410) is communicated with the adjusting pipeline (502), one end of the water return pipe (705) is communicated with the first connecting pipe (503) and extends into the first connecting pipe (410) and is communicated with the other end (503), the third connecting block (11) is fixedly connected to one end of the connecting rod (503) located in the second connecting pipe (410), the third connecting block (11) is matched with the end part of the water return pipe (705), a reset spring (12) is arranged between one side, close to the first connecting block (9), of the third connecting block (11) and the side wall, close to the second connecting pipe (410), of the adjusting pipeline (502), and the water outlet pipe (704) is arranged on one side, close to the second connecting pipe (410), of the adjusting pipeline (502).

6. A gearbox cooling mechanism as set forth in claim 5, wherein: the cooling box (706) is internally provided with a rotating shaft (14), auger blades (141), a driving fan (142) and a third belt body (143), one end of a second oil outlet pipe (701) is communicated with the inside of the cooling box (706), the end part of the second oil outlet pipe (701) is connected with the top of the side wall of the cooling box (706), one end of the second oil outlet pipe (701) close to the cooling box (706) extends along the horizontal direction, the inner top wall of the cooling box (706) is connected with a mounting block (144), the inside of the mounting block (144) is hollow and communicated with the second oil outlet pipe (701), the driving fan (142) is vertically arranged, the driving fan (142) is rotationally arranged in the inside of the mounting block (144), the end part of the second oil outlet pipe (701) faces the driving fan (142), the bottom of the mounting block (144) is provided with a through hole (145), one side, far away from the second oil outlet pipe (701), of the mounting block (144) is connected with a fifth belt pulley (146), the driving fan (142) is connected with the fifth belt pulley (142), the fifth belt pulley (142) is rotationally arranged at the bottom of the second belt pulley (14) and is fixedly connected with the rotating shaft (14), the third belt body (143) is sleeved on the fifth belt pulley (146) and the sixth belt pulley (147), the auger blade (141) is connected to the side wall of the rotating shaft (14), the oil outlet (714) is formed in the bottom of the side wall of the cooling box (706), and the oil outlet (714) and the sixth belt pulley (147) are respectively formed in two ends of the rotating shaft (14).

7. A gearbox cooling mechanism as set forth in claim 6, wherein: the secondary cooling assembly (7) further comprises a cooling fan (708), the cooling fan (708) is arranged on the base (1), the cooling fan (708) is arranged on one side, close to the connecting plate (8), of the first water tank (702), the cooling fan (708) is connected to the connecting shaft (401), and the cooling fan (708) blows air towards the direction of the first water tank (702).

8. A gearbox cooling mechanism as set forth in claim 7, wherein: the first-stage cooling assembly (6) comprises a first oil return pipe (602), one end of the first oil return pipe (602) is connected with a first oil outlet pipe (601), a second oil return pipe (707) is communicated with the side wall of the cooling box (706), a third connecting pipe (13) is communicated with the top of the gear box (2), one end, away from the first oil outlet pipe (601), of the first oil return pipe (602) is communicated with the third connecting pipe (13), one end, away from the cooling box (706), of the second oil return pipe (707) is communicated with the third connecting pipe (13), and one end, close to the third connecting pipe (13), of the second oil return pipe (707) is provided with a one-way valve (131).