CN111431343A

CN111431343A - Cooling system for traction motor of loader

Info

Publication number: CN111431343A
Application number: CN202010343902.0A
Authority: CN
Inventors: 魏加洁; 齐俊阔; 王振; 郭彬; 郁干; 齐陆燕
Original assignee: Science and Technology Branch of XCMG
Current assignee: Science and Technology Branch of XCMG
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2020-07-17

Abstract

The invention discloses a cooling system for a traction motor of a loader, and belongs to the technical field of engineering machinery. The air inlet of the fan is connected with the filter element box, and the air inlet III of the filter element box is connected with the prefilter; the air outlet of the fan is connected with the air distributing box; the outer cover of the traction motor is provided with an axle housing; and an air outlet I of the air distribution box is communicated to an air inlet II of the axle housing through an air duct. The fan is connected with the hydraulic motor, the traction motor is provided with a temperature sensor, and the temperature sensor is electrically connected to the program control module; and the program control module is connected with the hydraulic pump in a control mode. The hydraulic motor is provided with a rotating speed sensor, the filter element box is connected with a resistance indicator, and a display is arranged in the cab. The invention can effectively ventilate and cool the traction motor of the loader, reduce the dust content in the cooling air and prolong the service life of the traction motor; the rotating speed of the fan is controlled through the temperature of the traction motor, energy loss is reduced, real-time monitoring of the whole system can be achieved, and a driver can find problems and adjust the problems conveniently.

Description

Cooling system for traction motor of loader

Technical Field

The invention relates to the technical field of engineering machinery, in particular to a cooling system for a traction motor of a loader.

Background

At present, research and development of new energy loaders are being carried out comprehensively, and as an important component of a loader traction system, the research and development of the electric drive loader are realized by controlling the temperature rise of a traction motor and cooling the traction motor. At present, forced air cooling and traction motor self-cooling are mainly used for cooling the traction motor.

However, as the loader is complex in use working condition, severe in working environment and high in air dust and dust content, the traction motor can adsorb a large amount of dust due to common forced air cooling and self-cooling, the reliability of the traction motor is affected, and the service life of the whole loader is shortened.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the loader traction motor cooling system which is simple in structure, can provide clean cooling air for the traction motor, is adaptive in air supply amount, and is efficient and energy-saving.

In order to achieve the purpose, the invention adopts the technical scheme that: a cooling system of a traction motor of a loader comprises a fan, wherein an air inlet of the fan is connected with a filter element box, and an air inlet III of the filter element box is connected with a prefilter; the air outlet of the fan is connected with an air distribution box; an axle housing is arranged on the outer cover of the traction motor, and an air outlet II and an air inlet II are formed in the axle housing; and the air outlet I of the air distribution box is communicated to the axle housing air inlet II through an air duct.

It further comprises the following steps: the filter element box air outlet III is connected with the air inlet of the fan, a partition plate is arranged in the filter element box, and the partition plate divides the interior of the filter element box into a right chamber and a left chamber; the right chamber is close to the air inlet III of the filter element box, and a plurality of groups of filter element groups are arranged in the right chamber; the lower end surface of the right chamber is a conical dust collecting hopper II, and the lowest part of the dust collecting hopper II is provided with a dust exhaust valve II; when the negative pressure in the filter element box disappears, the dust exhaust valve II is opened under the action of gravity; the left chamber is close to the air outlet III of the filter element box, and the filter element box is provided with a maintenance port and a resistance indicator which are communicated with the left chamber.

The filter element group comprises a bracket and a filter cartridge; the left end of the bracket is fixed on the partition plate through a bolt; the filter cylinder is sleeved on the support, and the right end of the filter cylinder is fixed with the support through a bolt.

The prefilter is hinged with one side face of the filter element box through a hinge, a matched lock catch is arranged on the prefilter and the other side face of the filter element box, and a sealing strip is arranged on the matching contact surface of the air inlet III of the filter element box and the prefilter.

Two layers of cyclone tubes are arranged in the prefilter, and the lower end surface of the prefilter is provided with a dust collecting hopper I with a conical surface; the lowest part of the dust collecting hopper I is provided with a dust exhaust valve I; when the negative pressure in the prefilter disappears, the dust exhaust valve I is opened under the action of gravity.

The air duct is formed by splicing a stainless steel pipe and a flexible hose.

The fan is connected with a hydraulic motor, the hydraulic pump is connected with the hydraulic motor and provides a power oil source for the hydraulic motor, and the hydraulic pump is communicated with an oil tank through an overflow valve; the traction motor is provided with a temperature sensor which is electrically connected to the program control module; and the program control module is in control connection with the hydraulic pump.

A rotating speed sensor is arranged on the hydraulic motor, a resistance indicator is connected to the filter element box, and a display is arranged in the cab; the resistance indicator is electrically connected to the display; the rotating speed sensor is electrically connected to the program control module; the program control module is electrically connected to the display.

Compared with the prior art, the invention has the beneficial effects that:

1. the ventilation cooling can be effectively carried out on the traction motor of the loader, and the cooling air is filtered by two stages of air, so that the dust content in the cooling air is reduced, and the service life of the traction motor is prolonged;

2. the rotating speed of the fan is controlled through the temperature of the traction motor, so that the energy loss is reduced;

3. the axle housing is continuously ventilated, so that dust and sundries are effectively prevented from entering the axle housing to influence the work of the traction motor, and the reliability of the whole machine is improved;

4. through temperature sensor, speed sensor, resistance indicator and the display in the driver's cabin, realize the real time monitoring to entire system, the navigating mate technique of being convenient for discovers the problem and adjusts.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a cooling system of a traction motor of a loader according to one embodiment of the present invention;

FIG. 2 is a schematic diagram of a partial configuration of a cooling system for a traction motor of a loader according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a prefilter according to a first embodiment of the present invention;

FIG. 4 is a schematic view of a cartridge housing according to a first embodiment of the present invention;

FIG. 5 is a schematic view of a filter element assembly according to a first embodiment of the present invention;

FIG. 6 is a schematic view of a wind-dividing box according to a first embodiment of the present invention;

FIG. 7 is a schematic view of the hydraulic pressure principle of the fan in the second embodiment of the present invention;

fig. 8 is an electrical wiring diagram of the monitoring system according to the second embodiment of the present invention.

In the figure: 1. the device comprises a prefilter 11, dust collecting hoppers I and 12, dust exhaust valves I and 13, cyclone pipes 14 and hinges; 2. the filter element box 21, the resistance indicator 22, the dust collecting hoppers II and 23, the dust exhaust valves II and 24, the lock catches 25, the maintenance ports 26, the right chamber 27, the left chamber 28, the sealing strips 29, the air outlets III and 210 and the partition boards; 3. a filter element group 31, a bracket 32 and a filter cartridge; 4. a fan; 5. the air distributing box 51, the air outlets I and 52 and the air inlet I; 61. temperature sensor, 62, program control module, 63, cab display, 64, traction motor; 7. an axle housing 71, a flexible hose 72 and a stainless steel pipe; 8. a hydraulic pump; 9. hydraulic motor, 91 rotation speed sensor; 10. an overflow valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1 to 6, in a cooling system of a loader traction motor, an air inlet of a fan 4 is connected with a filter element box 2, an air inlet iii of the filter element box 2 is connected with a prefilter 1, and a plurality of filter element groups 3 are installed in the filter element box 2. An air outlet of the fan 4 is connected with an air inlet I52 of the air distribution box 5. The traction motor 64 outer cover is provided with an axle housing 7, an air outlet II and an air inlet II are formed in the axle housing 7, and an air outlet I51 of the air distribution box 5 is communicated to the air inlet II of the axle housing 7 through an air duct. During operation, air enters the fan 4 through the prefilter 1 and the filter element box 2 provided with the multiple groups of filter element groups 3, clean air after two-stage filtration enters the air distribution box 5 through the fan 4, enters the front axle housing 7 and the rear axle housing 7 provided with the traction motor 6 through the air duct pipeline formed by the stainless steel pipe 72 and the flexible hose 71, and passes through the interior of the traction motor 6 and is discharged through the air outlet II of the axle housing 7. Both guaranteed traction motor 6 and obtained the cooling, can utilize the ventilation cooling that lasts again to form the malleation in axle housing 7 is inside, prevent that dust and debris from getting into behind axle housing 7 and adhering to on traction motor 6, improve traction motor 6 life and complete machine reliability.

In this embodiment, the air duct is formed by splicing a stainless steel pipe 72 and a flexible hose 71. Stainless steel pipe 72 is used as a ventilation duct, and stainless steel pipe 72 can not generate iron rust due to corrosion and enter traction motor 6 through the air duct, so that the service life of traction motor 6 is prolonged. Because the loader adopts a front-back hinged structure and a rear axle swinging structure, the air duct needs to be frequently bent and deflected, and the flexible hose 71 is adopted to meet the use requirement of the loader.

Referring to fig. 2 and 4, an air outlet iii 29 of the filter element box 2 is connected with an air inlet of the fan 4, a partition plate 210 is arranged in the filter element box 2, and the inside of the filter element box 2 is divided into a right chamber 26 and a left chamber 27 by the partition plate 210. The left chamber 27 is close to the air outlet III 29 of the filter element box 2, and the filter element box 2 is provided with a maintenance port 25 and a resistance indicator 21 which are communicated with the left chamber 27. The right chamber 26 is close to the air inlet III of the filter element box 2, and a plurality of groups of filter element groups 3 are arranged in the right chamber 26. The lower end surface of the right chamber 26 is a conical dust collecting hopper II 22, and the lowest part of the dust collecting hopper II 22 is provided with a dust exhaust valve II 23. When the system stops working and the negative pressure in the filter element box 2 disappears, the dust exhaust valve II 23 is opened under the gravity action of the collected dust, and the dust is exhausted through the dust exhaust valve 23.

As shown in fig. 5, the filter element group 3 includes a holder 31 and a filter cartridge 32. The left end of the bracket 31 is fixed on the clapboard 210 through a bolt; the holder 31 is detachable through a maintenance opening 25 formed in the left chamber 27. The filter cartridge 32 is fitted around the bracket 31, and the right end of the filter cartridge 32 is fixed to the bracket 31 by a bolt. Because the filter cartridge 32 is a maintenance part, the whole machine needs to be replaced after working for a period of time, when the filter cartridge 32 is disassembled, the filter cartridge 32 can be taken down by only rotating and opening the prefilter 1 and unscrewing the mounting bolt on the right side of the filter element group 3, which is convenient and fast.

Referring to fig. 2 to 4, one side of the prefilter 1 is hinged to one side of the filter element box 2 through a hinge 14, the other sides of the prefilter 1 and the filter element box 2 are provided with a lock catch 24 which is matched with the other side, and a sealing strip 28 is arranged on a matching contact surface of an air inlet iii of the filter element box 2 and the prefilter 1. When the system works, the prefilter 1 is fixed by the lock catch 24, so that the prefilter 1 is tightly attached to the filter element box 2, and all air must enter the system after being filtered by the prefilter 1. After the lock catch 24 is opened, the prefilter 1 can be rotated to be opened, so that the prefilter 1 can be cleaned and the filter element group 3 can be replaced at a later stage conveniently.

Two layers of cyclone tubes 13 are arranged in the prefilter 1, and the lower end surface of the prefilter 1 is provided with a dust collecting hopper I11 with a conical surface; the lowest part of the dust collecting hopper I11 is provided with a dust exhaust valve I12. Because the loader work environment is poor, a large amount of dust exists in the surrounding air, and a large amount of large-particle dust in the air can be filtered after the cyclone tube 12, so that the service life of the lower-level air filter element group 3 is prolonged. When the system stops working and the negative pressure in the prefilter 1 disappears, the dust exhaust valve I12 is opened under the gravity action of collected dust, and the dust is exhausted through the dust exhaust valve 12.

Preferably: an air drying device can be added in the cooling system to reduce the corrosion of the system caused by the moisture in the air. The air drying device is taken as the prior art, and the embodiment does not further limit the air drying device.

Example two

On the basis of the first embodiment, as shown in fig. 7 and 8, the fan 4 is connected to the hydraulic motor 9, and the fan 4 is driven by the hydraulic motor 9. The hydraulic pump 8 sucks oil from an oil tank, and the hydraulic pump 8 is connected with the hydraulic motor 9 and provides a power oil source for the hydraulic motor 9. The hydraulic pump 8 returns oil to the oil tank through an overflow valve 10. The traction motor 6 is provided with a temperature sensor 61, the temperature sensor 61 is electrically connected to a program control module 62, and the program control module 62 is connected with the hydraulic pump 8 in a control way; the temperature sensor 61 is used to detect the temperature of the traction motor 6 in real time and transmit the temperature information to the program control module 62. The program control module 62 receives the temperature information of the traction motor 6, and outputs a signal to control the row of the hydraulic pump 8 according to the set program of the program control module 62, so as to control the rotating speed of the hydraulic motor 9 and the flow of the fan 4, thereby reducing energy loss and improving the performance of the whole machine. .

The hydraulic motor 9 is provided with a rotating speed sensor 91, the filter element box 2 is connected with a resistance indicator 21, and a display 63 is arranged in the cab. The resistance indicator 21 is electrically connected to the display 63, and displays resistance information on the display 63. The rotation speed sensor 91 is electrically connected to the program control module 62, and the program control module 62 is electrically connected to the display 63; the rotating speed information of the hydraulic motor 9 detected by the rotating speed sensor 91 and the temperature information of the traction motor 6 detected by the temperature sensor 61 are displayed on the display 63, so that the real-time monitoring of the system is realized.

The embodiment can show that the fan 4 can effectively ventilate and cool the traction motor 6 of the loader, so that the problem that the service life of the traction motor 6 is shortened due to overhigh temperature of the traction motor 6 is solved;

after the cooling air passes through the prefilter 1, a large amount of large-particle dust is filtered, so that the service life of the filter element group 3 in the filter element box 2 is prolonged, meanwhile, the prefilter 1 can be rotated to be opened, the filter cartridge 32 is convenient to replace, and the maintainability of the whole machine is improved; clean air is used for cooling the traction motor 6, so that the influence of air dust on the traction motor 6 is reduced, and the reliability of the traction motor 6 is improved;

meanwhile, the rotating speed of the fan 4 is controlled through the temperature of the traction motor 6, and energy loss is reduced. The axle housing 7 is ventilated continuously, so that dust and sundries are prevented from entering the axle housing 7, and the reliability of the whole machine is improved;

the temperature sensor 61, the rotating speed sensor 91, the resistance indicator 21 and the cab display 63 are connected to realize real-time monitoring of the whole system.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A loader traction motor cooling system, includes fan (4), its characterized in that: an air inlet of the fan (4) is connected with a filter element box (2), and an air inlet III of the filter element box (2) is connected with a prefilter (1); an air outlet of the fan (4) is connected with an air distribution box (5); an axle housing (7) is arranged outside the traction motor (64), and an air outlet II and an air inlet II are formed in the axle housing (7); and the air outlet I (51) of the air distribution box (5) is communicated to the air inlet II of the axle housing (7) through an air duct.

2. The loader traction motor cooling system of claim 1 wherein: an air outlet III (29) of the filter element box (2) is connected with an air inlet of the fan (4), a partition plate (210) is arranged in the filter element box (2), and the partition plate (210) divides the interior of the filter element box (2) into a right chamber (26) and a left chamber (27); the right chamber (26) is close to an air inlet III of the filter element box (2), and a plurality of groups of filter element groups (3) are arranged in the right chamber (26); the lower end surface of the right chamber (26) is a cone-shaped dust collecting hopper II (22), and the lowest part of the dust collecting hopper II (22) is provided with a dust exhaust valve II (23); when the negative pressure in the filter element box (2) disappears, the dust exhaust valve II (23) is opened under the action of gravity; the left chamber (27) is close to the air outlet III (29) of the filter element box (2), and the filter element box (2) is provided with a maintenance opening (25) communicated with the left chamber (27) and a resistance indicator (21).

3. The loader traction motor cooling system of claim 2 wherein: the filter element group (3) comprises a bracket (31) and a filter cartridge (32); the left end of the bracket (31) is fixed on the partition plate (210) through a bolt; the filter cartridge (32) is sleeved on the support (31), and the right end of the filter cartridge (32) is fixed with the support (31) through a bolt.

4. The loader traction motor cooling system of claim 2 wherein: the filter element box is characterized in that the prefilter (1) is hinged to one side face of the filter element box (2) through a hinge (14), a matched lock catch (24) is arranged on the other side face of the prefilter (1) and the other side face of the filter element box (2), and a sealing strip (28) is arranged on a matching contact face of the air inlet III of the filter element box (2) and the prefilter (1).

5. The loader traction motor cooling system of claim 2 wherein: two layers of cyclone tubes (13) are arranged in the prefilter (1), and the lower end surface of the prefilter (1) is provided with an ash collecting hopper I (11) with a conical surface; the lowest part of the dust collecting hopper I (11) is provided with a dust exhaust valve I (12); when the negative pressure in the prefilter (1) disappears, the dust exhaust valve I (12) is opened under the action of gravity.

6. The loader traction motor cooling system of claim 1 wherein: the air duct is formed by splicing a stainless steel pipe (72) and a flexible hose (71).

7. The loader traction motor cooling system of claim 1 wherein: the fan (4) is connected with a hydraulic motor (9), the hydraulic pump (8) is connected with the hydraulic motor (9) and provides a power oil source for the hydraulic motor (9), and the hydraulic pump (8) is communicated with an oil tank through an overflow valve (10); a temperature sensor (61) is arranged on the traction motor (6), and the temperature sensor (61) is electrically connected to the program control module (62); the program control module (62) controls and connects the hydraulic pump (8).

8. The loader traction motor cooling system of claim 7 wherein: a rotating speed sensor (91) is arranged on the hydraulic motor (9), a resistance indicator (21) is connected to the filter element box (2), and a display (63) is installed in the cab; the resistance indicator (21) is electrically connected to a display (63); the rotation speed sensor (91) is electrically connected to a program control module (62); the program control module (62) is electrically connected to the display (63).