CN117823611B - Cooling structure of speed change gear box - Google Patents

Abstract

The present invention belongs to the technical field of gearboxes, and in particular to a cooling structure for a speed-changing gearbox, the present invention comprises: a gearbox housing; a transmission chamber for accommodating a gear set is arranged inside the gearbox housing, and a cooling chamber isolated from the transmission chamber is arranged outside the transmission chamber; a coolant tank body, which is filled with coolant, and the transmission chamber is cooled when the coolant flows through the cooling chamber, and a control valve assembly is connected to the coolant tank body; wherein the control valve assembly is arranged in the cooling chamber; a heat dissipation mechanism, which is connected to the coolant tank body with a first return pipe, and is connected to the cooling chamber with a second return pipe; a circulating pump, which is used to draw the coolant in the cooling chamber back to the heat dissipation mechanism; the control valve assembly of the present invention senses the temperature in the transmission chamber through a heat sensing tube, automatically increases the degree of opening of the valve hole, increases the rate at which the coolant flows into the cooling chamber, and improves the cooling rate of the transmission chamber.

Description

A cooling structure for a speed change gear box

Technical Field

The invention relates to the technical field of gearboxes, and in particular to a cooling structure for a speed-changing gearbox.

Background Art

In order to prevent the lubricating oil temperature from rising due to the friction between the gears when the gearbox is in operation, the gearbox temperature rises, and the lubricating oil is in a high temperature environment for a long time, which easily causes deterioration and thus fails to provide a better lubrication effect for the gears. Therefore, the gearbox is generally equipped with a cooling system to reduce the temperature of the lubricating oil, thereby reducing the temperature of the gearbox to prevent the above situation from occurring in the gearbox and extend the life of the gearbox during use.

In the prior art, the cooling structure of the gearbox generally uses a circulating coolant to cool the gearbox. The flow rate of the coolant is fixed during the circulating flow, so the cooling rate of the gearbox is fixed. When the temperature of the gearbox is too high, the coolant with a fixed flow rate cannot meet the rapid cooling of the gearbox.

Summary of the invention

In view of the deficiencies in the prior art, the present invention provides a speed change gear box cooling structure, which is equipped with a control valve assembly and can automatically adjust the coolant flow rate according to the temperature in the transmission chamber, aiming to solve the problems in the background technology.

In order to achieve the above technical objectives, the specific technical scheme of the present invention is as follows: a cooling structure of a speed change gearbox proposed by the present invention comprises: a gearbox housing; a transmission chamber for placing a gear set is provided in the gearbox housing, and a cooling chamber isolated from the transmission chamber is provided outside the transmission chamber; a coolant tank body, which is filled with coolant, and the coolant cools the transmission chamber when flowing through the cooling chamber, and a control valve assembly is connected to the coolant tank body, and the control valve assembly automatically adjusts the speed at which the coolant flows into the cooling chamber according to the temperature in the transmission chamber, thereby changing the cooling rate in the transmission chamber; wherein the control valve assembly is arranged in the cooling chamber; the coolant in the coolant tank body flows into the cooling chamber through the control valve assembly; a heat dissipation mechanism, a first return pipe is connected to the coolant tank body, and a second return pipe is connected to the cooling chamber; a circulating pump is used to draw the coolant in the cooling chamber back to the heat dissipation mechanism, and the coolant flows back to the coolant tank body after being cooled by the heat dissipation mechanism.

As a preferred technical solution of the present invention, the control valve assembly includes: a thermal sensing cylinder with a sealed structure, which is arranged inside the cooling chamber and hydraulic oil is arranged in the thermal sensing cylinder; a regulating valve, which can automatically change the valve size in cooperation with the thermal sensing cylinder; a liquid inlet pipe and a liquid outlet pipe are respectively connected to both ends of the regulating valve, and the liquid inlet pipe is connected to the coolant tank; and the liquid outlet pipe is connected to the cooling chamber.

As a preferred technical solution of the present invention, the thermal sensing cylinder is sealed with an oil cylinder, one end of the oil cylinder is inserted into the thermal sensing cylinder, and the other end is arranged outside the thermal sensing cylinder; the oil cylinder is connected with a lift rod that can be raised and lowered, and the lift rod can automatically rise and fall according to the change of temperature in the thermal sensing cylinder, and the lift rod is connected with a piston block that is sealably connected to the oil cylinder; when the temperature in the thermal sensing cylinder rises, causing its internal pressure to increase, the oil level in the oil cylinder rises, pushing the lift rod up.

As a preferred technical solution of the present invention, a liquid inlet and a liquid outlet are respectively provided at both ends of the regulating valve, and a valve hole connected to the liquid inlet and the liquid outlet is provided inside the regulating valve. A liftable valve core is connected inside the regulating valve, and the valve core is used to adjust the opening size of the valve hole.

As a preferred technical solution of the present invention, a guide seat is provided on the regulating valve, a valve stem is sealingly and movably connected to the guide seat, one end of the valve stem is fixedly connected to the valve core, and the other end of the valve stem is fixedly connected to the lifting rod.

As a preferred technical solution of the present invention, a lifting block that can be raised and lowered is connected inside the guide seat, the valve stem is fixedly connected to the lifting block, and a pressure sensor is connected to the lifting block. A return spring is connected between the pressure sensor and the top of the guide seat, and a controller is installed on the outside of the gearbox housing, and the pressure sensor and the circulating pump are electrically connected to the controller.

As a preferred technical solution of the present invention, the valve hole and the valve core are both in a conical structure, and the opening degree of the valve hole increases when the valve core rises.

As a preferred technical solution of the present invention, the heat dissipation mechanism includes: an upper shell and a lower shell, between which a heat dissipation pipe arranged in a reciprocating curved shape is connected; and a heat dissipation fan for blowing air to cool the heat dissipation pipe.

As a preferred technical solution of the present invention, the transmission chamber is provided with a plurality of heat dissipation fins.

The beneficial effects of the present invention are:

1. The control valve assembly of the present invention senses the temperature in the transmission chamber through a heat sensing tube. When the temperature rises, the pressure in the heat sensing tube increases, the hydraulic oil drives the lifting rod to rise, and the lifting rod drives the valve stem and the valve core to rise, thereby increasing the degree of opening of the valve hole, increasing the rate at which the coolant flows into the cooling chamber, and improving the cooling rate of the transmission chamber, so that the cooling rate of the gearbox by the cooling structure can be automatically adjusted according to the temperature of the gearbox.

2. The present invention provides a pressure sensor in the regulating valve. When the lifting rod rises, the pressure of the pressure sensor increases, and a signal is sent to the controller. The controller controls the circulation pump to increase the power, thereby increasing the rate at which the coolant flows out of the cooling chamber, thereby automatically increasing the circulation rate of the coolant.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a speed change gear box cooling structure proposed by the present invention.

FIG. 2 is a schematic diagram from another angle of a cooling structure of a speed change gear box proposed by the present invention.

FIG. 3 is a schematic top view of a cooling structure for a speed change gear box according to the present invention.

FIG. 4 is a schematic structural diagram of a control valve assembly according to the present invention.

FIG. 5 is a schematic diagram of the interior of the thermal induction tube proposed by the present invention.

FIG. 6 is a schematic diagram of the structure of the regulating valve proposed in the present invention.

FIG. 7 is a schematic structural diagram of the heat dissipation mechanism proposed by the present invention.

In the figure: 1. gearbox housing; 101. transmission chamber; 102. cooling chamber; 103. heat dissipation fins; 2. control valve assembly; 21. heat sensing cylinder; 211. oil cylinder; 212. lifting rod; 213. piston block; 214. hydraulic oil; 22. regulating valve; 221. liquid inlet; 222. liquid outlet; 223. valve hole; 224. valve stem; 225. valve core; 226. guide seat; 227. lifting block; 228. pressure sensor; 229. reset spring; 3. coolant tank; 4. heat dissipation mechanism; 41. lower housing; 42. upper housing; 43. heat dissipation pipe; 44. cooling fan; 5. controller; 6. liquid inlet pipe; 7. first reflux pipe; 8. second reflux pipe; 9. circulation pump; 10. liquid outlet pipe.

DETAILED DESCRIPTION

The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

Embodiment: The present embodiment discloses a cooling structure for a speed change gearbox, as shown in FIGS. 1 to 7 , comprising: a gearbox housing 1; a transmission chamber 101 for placing a gear set is provided in the gearbox housing 1, a cooling chamber 102 isolated from the transmission chamber 101 is provided on the periphery of the transmission chamber 101, the cooling chamber 102 and the transmission chamber 101 are completely closed to prevent the liquid in the cooling chamber 102 from flowing into the transmission chamber 101; the cooling chamber 102 is U-shaped, and a coolant tank 3 is provided with coolant inside, and the coolant cools down the transmission chamber 101 when flowing through the cooling chamber 102, and a control valve assembly 2 is connected to the coolant tank 3, and the control valve assembly 2 can automatically adjust the speed at which the coolant flows into the cooling chamber 102 according to the temperature in the transmission chamber 101, thereby changing the cooling rate in the transmission chamber 101; wherein the control valve assembly 2 is arranged in the cooling chamber 102; the coolant in the coolant tank 3 is controlled by the control valve assembly 2. The valve assembly 2 flows into the cooling chamber 102, and the control valve assembly 2 is used to adjust the liquid inlet speed of the cooling chamber 102; the heat dissipation mechanism 4 is connected to the first return pipe 7 between the cooling liquid box 3, and is connected to the cooling chamber 102 with a second return pipe 8; the circulating pump 9 is used to pump the cooling liquid in the cooling chamber 102 back to the heat dissipation mechanism 4, and can adjust the liquid outlet speed of the cooling chamber 102. The cooling liquid returns to the cooling liquid box 3 after being cooled by the heat dissipation mechanism 4; in specific implementation: the cooling liquid box 3 flows to the left end of the cooling chamber 102 through the control valve assembly 2 under the action of gravity, and the cooling liquid flows from the left end to the right end of the cooling chamber 102. The transmission chamber 101 is cooled during the flow process. The circulating pump 9 pumps the cooling liquid in the cooling chamber 102 into the heat dissipation mechanism 4. The cooling liquid dissipates heat through the heat dissipation mechanism 4 and flows back to the cooling liquid box 3. The circulating flow of the cooling liquid realizes the cooling of the gearbox.

As shown in Fig. 4 to Fig. 6, the control valve assembly 2 comprises: a heat sensing cylinder 21 with a sealed structure, which is arranged at one end of the liquid outlet in the cooling chamber 102, and hydraulic oil 214 is arranged in the heat sensing cylinder 21; an oil cylinder 211 is sealedly connected to the heat sensing cylinder 21, and the diameter of the oil cylinder 211 is much smaller than the diameter of the heat sensing cylinder 21, one end of the oil cylinder 211 is inserted into the heat sensing cylinder 21, and the other end is arranged outside the heat sensing cylinder 21; a lifting rod 212 which can be raised and lowered is connected to the oil cylinder 211, and the lifting rod 212 can automatically rise and fall according to the change of the temperature in the heat sensing cylinder 21, and a piston block 213 which is sealed and movably connected to the oil cylinder 211 is connected to the lifting rod 212; when the heat When the temperature in the induction cylinder 21 rises, according to the principle of thermal expansion and contraction, the gas and liquid in the heat induction cylinder 21 expand, the internal pressure increases, and the air pressure presses the hydraulic oil 214 into the oil cylinder 211, driving the lifting rod 212 to rise. Since the diameter of the oil cylinder 211 is much smaller than the diameter of the heat induction cylinder 21, the lifting rod 212 can sense the temperature change more accurately; the regulating valve 22 can automatically change the valve size in cooperation with the heat induction cylinder 21, and the regulating valve 22 is fixedly installed on the inner wall of the cooling chamber 102; the two ends of the regulating valve 22 are respectively connected to the liquid inlet pipe 6 and the liquid outlet pipe 10, and the liquid inlet pipe 6 is connected to the coolant tank 3; the liquid outlet pipe 10 is connected to the cooling chamber 102, and the outlet pipe 10 is connected to the cooling chamber 102. The outlet of the liquid pipe 10 is arranged at the left end of the cooling chamber 102, the heat sensing tube 21 is arranged at the right end of the cooling chamber 102, and the liquid outlet of the cooling chamber 102 is also arranged at the right end; the regulating valve 22 is provided with a liquid inlet 221 and a liquid outlet 222 at both ends, and the regulating valve 22 is provided with a valve hole 223 connected to the liquid inlet 221 and the liquid outlet 222, the liquid inlet 221 is connected to the upper end of the valve hole 223, and the liquid outlet 222 is connected to the lower end of the valve hole 223, and a liftable valve core 225 is connected to the regulating valve 22, and the valve core 225 is used to adjust the opening size of the valve hole 223, wherein the valve hole 223 and the valve core 225 are both conical. The diameters of the valve hole 223 and the valve core 225 gradually decrease from top to bottom. When the valve core 225 rises, the opening degree of the valve hole 223 increases, and when the valve core 225 descends, the opening degree of the valve hole 223 decreases. A guide seat 226 is provided on the regulating valve 22, and a valve stem 224 is sealingly and movably connected to the guide seat 226. One end of the valve stem 224 is fixedly connected to the valve core 225, and the other end of the valve stem 224 is fixedly connected to the lifting rod 212. When the lifting rod 212 rises, it drives the valve stem 224 to rise, drives the valve core 225 to rise, and increases the opening degree of the valve hole 223. The liquid inlet speed of the cooling chamber 102 is increased, and the cooling rate of the transmission chamber 101 is improved.

Furthermore, a lifting block 227 that can be lifted and lowered is connected inside the guide seat 226, the valve stem 224 is fixedly connected to the lifting block 227, and a pressure sensor 228 is connected to the lifting block 227. A reset spring 229 is connected between the pressure sensor 228 and the top of the guide seat 226. The valve stem 224 drives the lifting block 227 to rise, and the pressure value of the pressure sensor 228 increases. A controller 5 is installed on the outside of the gearbox housing 1, and the pressure sensor 228 and the circulating pump 9 are electrically connected to the controller 5; the pressure sensor 228 sends a signal to the controller 5, and the controller 5 adjusts the power of the circulating pump 9.

Furthermore, the transmission chamber 101 is provided with a plurality of heat dissipation fins 103 to increase the contact area between the transmission chamber 101 and the coolant and improve the heat transfer efficiency.

As shown in Figure 7, the heat dissipation mechanism 4 includes: an upper shell 42 and a lower shell 41, between which a heat dissipation pipe 43 arranged in a reciprocating curved shape is connected; a heat dissipation fan 44 is used to blow air to cool the heat dissipation pipe 43, and the circulation pump 9 draws the coolant into the upper shell 42, and the coolant flows to the lower shell 41 through the heat dissipation pipe 43. During the flow, the heat dissipation fan 44 blows air to the heat dissipation pipe 43 to cool the heat dissipation pipe 43, thereby reducing the temperature of the coolant, and the cooled coolant flows back to the coolant tank 3.

Working principle of control valve assembly 2: When the temperature in transmission chamber 101 rises, the temperature of coolant in cooling chamber 102 rises. When the temperature of coolant rises, the pressure in heat sensing cylinder 21 increases due to the principle of thermal expansion and contraction. The air pressure presses hydraulic oil 214 into oil cylinder 211. The hydraulic oil 214 in oil cylinder 211 rises and drives lifting rod 212 to rise. Lifting rod 212 drives valve stem 224, lifting block 227 and valve core 225 to rise. After valve core 225 rises, the opening degree of valve hole 223 increases, which increases the coolant entering cooling chamber 102. The rate of chamber 102 is increased, thereby improving the cooling rate of transmission chamber 101; at the same time, when the lifting block 227 rises, it drives the pressure sensor 228 to rise, the pressure of the pressure sensor 228 increases, and the signal is sent to the controller 5. The controller 5 controls the circulating pump 9 to increase the power, thereby increasing the rate at which the coolant flows out of the cooling chamber 102, thereby increasing the circulation flow rate of the coolant and improving the cooling rate of the transmission chamber 101; similarly, when the temperature in the transmission chamber 101 decreases, the valve core 225 descends, the opening degree of the valve hole 223 becomes smaller, the value of the pressure sensor 228 becomes lower, the rate at which the coolant enters and flows out of the cooling chamber 102 becomes smaller, and the cooling efficiency of the transmission chamber 101 becomes smaller; the cooling structure of this embodiment can automatically adjust the circulation flow rate of the coolant according to the temperature of the transmission chamber 101, thereby automatically adjusting the cooling rate of the transmission chamber 101, thereby avoiding excessive temperature of the transmission chamber 101.

Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (4)

1. A speed change gear box cooling structure, characterized by comprising:

a gearbox housing (1);

A transmission chamber (101) for placing a gear set is arranged in the gearbox shell (1), and a cooling chamber (102) isolated from the transmission chamber (101) is arranged at the periphery of the transmission chamber;

The cooling liquid box body (3) is internally provided with cooling liquid, the cooling liquid cools the transmission chamber (101) when flowing through the cooling chamber (102), the cooling liquid box body (3) is connected with a control valve assembly (2), and the control valve assembly (2) automatically adjusts the speed of the cooling liquid flowing into the cooling chamber (102) according to the temperature in the transmission chamber (101) so as to change the cooling rate in the transmission chamber (101);

Wherein the control valve assembly (2) is arranged in the cooling chamber (102); the cooling liquid in the cooling liquid box body (3) flows into the cooling chamber (102) through the control valve assembly (2);

A first return pipe (7) is connected between the heat dissipation mechanism (4) and the cooling liquid box body (3), and a second return pipe (8) is connected between the heat dissipation mechanism and the cooling chamber (102);

The circulating pump (9) is used for pumping the cooling liquid in the cooling chamber (102) back into the cooling mechanism (4), and the cooling liquid is cooled by the cooling mechanism (4) and then flows back into the cooling liquid box body (3);

the control valve assembly (2) comprises: a heat induction cylinder (21) with a sealing structure, which is arranged in the cooling chamber (102), and hydraulic oil (214) is arranged in the heat induction cylinder (21); a regulating valve (22) which is matched with the heat induction cylinder (21) to automatically change the opening of the valve; two ends of the regulating valve (22) are respectively connected with a liquid inlet pipe (6) and a liquid outlet pipe (10), and the liquid inlet pipe (6) is connected with the cooling liquid box body (3); the liquid outlet pipe (10) is communicated with the cooling chamber (102);

An oil cylinder (211) is connected to the heat induction cylinder (21) in a sealing way, one end of the oil cylinder (211) is inserted into the heat induction cylinder (21), and the other end of the oil cylinder is arranged outside the heat induction cylinder (21); the lifting rod (212) is automatically lifted according to the change of the temperature in the heat induction cylinder (21), and the lifting rod (212) is connected with a piston block (213) which is in sealing movable connection with the oil cylinder (211); when the temperature in the heat induction cylinder (21) is increased to increase the internal pressure, the height of the oil level in the oil cylinder (211) is increased, and the lifting rod (212) is jacked up;

The two ends of the regulating valve (22) are respectively provided with a liquid inlet (221) and a liquid outlet (222), a valve hole (223) connected with the liquid inlet (221) and the liquid outlet (222) is formed in the regulating valve (22), a liftable valve core (225) is connected in the regulating valve (22), and the valve core (225) is used for regulating the opening size of the valve hole (223);

A guide seat (226) is arranged on the regulating valve (22), a valve rod (224) is movably connected to the guide seat (226) in a sealing way, one end of the valve rod (224) is fixedly connected with a valve core (225), and the other end of the valve rod (224) is fixedly connected with the lifting rod (212);

The automatic transmission is characterized in that a lifting block (227) is connected in the guide seat (226), the valve rod (224) is fixedly connected with the lifting block (227), a pressure sensor (228) is connected to the lifting block (227), a reset spring (229) is connected between the pressure sensor (228) and the top of the guide seat (226), a controller (5) is mounted on the outer side of the transmission housing (1), and the pressure sensor (228) and the circulating pump (9) are electrically connected with the controller (5).

2. The cooling structure of a change gear box according to claim 1, wherein the valve hole (223) and the valve core (225) each have a tapered structure, and the opening degree of the valve hole (223) increases when the valve core (225) is lifted.

3. A speed change gearbox cooling structure according to claim 2, characterized in that the heat dissipation mechanism (4) comprises: an upper casing (42) and a lower casing (41), wherein a heat radiation pipe (43) which is arranged in a back-and-forth bending shape is connected between the upper casing (42) and the lower casing (41); and the cooling fan (44) is used for blowing and cooling the cooling tube (43).

4. A gearbox cooling arrangement according to claim 3, characterised in that the transfer chamber (101) is provided with a number of cooling fins (103).