CN112519746B

CN112519746B - Wheel loader brake pipeline with radiator

Info

Publication number: CN112519746B
Application number: CN202011545500.5A
Authority: CN
Inventors: 鲍奎宇; 钟俊伟; 张永胜; 刘浩; 张爱霞
Original assignee: Science and Technology Branch of XCMG
Current assignee: Science and Technology Branch of XCMG
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2022-02-11
Anticipated expiration: 2040-12-24
Also published as: CN112519746A

Abstract

The invention discloses a wheel loader brake pipeline with a radiator, and belongs to the technical field of wheel loader braking. The brake caliper comprises a brake caliper body, wherein an inlet one-way valve is installed at an oil inlet of the brake caliper body, and an outlet one-way valve is installed at an oil outlet of the brake caliper body; the oil outlet on the radiator is connected with the inlet one-way valve, the oil return port on the radiator is connected with the outlet one-way valve, and the oil filling port on the radiator is connected with a high-pressure oil source. On the premise of not influencing the braking performance, the brake fluid flows from the brake caliper to the radiator; the flow channel in the radiator can ensure the brake fluid to be fully radiated; the brake caliper can be timely cooled under the working condition that the brake is frequently used for a long time, meanwhile, the brake fluid can be prevented from boiling, the formation of air resistance is effectively prevented, the brake performance of the loader is greatly improved, and the driving safety of the loader is improved; the brake system can be directly improved on the original loader dry-type bridge brake system, and is convenient to install, low in cost and easy to realize.

Description

Wheel loader brake pipeline with radiator

Technical Field

The invention relates to the technical field of braking of wheel loaders, in particular to a wheel loader braking pipeline with a radiator, which is suitable for a wheel loader with air-top oil type dry braking.

Background

At present, most of domestic loaders are provided with dry bridges, and air-cap oil type braking systems are commonly used.

As shown in fig. 1, the brake pipeline schematic diagram of the conventional loader is mainly composed of a foot brake valve 001, an air reservoir 002, a booster pump 003 and a brake caliper 004;

most of wheel loaders are used for short-distance shovel loading operation, the operation distance is short, the circulation is fast, and the brake needs to be frequently stepped on. After the loader with the structure is frequently used for a long time and brakes, the temperature of the brake disc is high, and the high temperature is transmitted through the brake disc → the brake caliper piston → the brake fluid, so that the brake fluid is easily vaporized to form air resistance. The air resistance can cause the loader to have a soft brake, and the brake failure can occur in serious cases, thereby seriously affecting the driving safety of the loader.

Disclosure of Invention

In order to solve the technical problem, the invention provides a wheel loader brake pipeline with a radiator, wherein the brake fluid and a brake caliper are cooled by the radiator, so that the driving safety of the loader is greatly improved.

The invention is realized by the following technical scheme: a wheel loader brake pipeline with a radiator comprises a brake caliper body, wherein an inlet one-way valve is installed at an oil inlet of the brake caliper body, and an outlet one-way valve is installed at an oil outlet of the brake caliper body; the oil outlet on the radiator is connected with the inlet one-way valve, the oil return port on the radiator is connected with the outlet one-way valve, and the oil filling port on the radiator is connected with a high-pressure oil source.

It further comprises the following steps: and an oil filling port on the radiator is connected with a booster pump.

An oil pipe is connected to an oil filling port on the radiator, the oil pipe is connected with a three-way joint, and the oil inlet end of the three-way joint is connected with the booster pump.

The radiator comprises a rectangular shell, and a partition plate I and a partition plate II which are alternately arranged in the rectangular shell; the partition plate I and the partition plate II are horizontally arranged, the oil through hole is formed in the middle of the partition plate I, the oil through holes are formed in the two ends of the partition plate II, and a brake fluid oil duct is formed among the partition plate I, the partition plate II and the oil through holes.

The upper positions of two ends of the radiator are respectively provided with an oil return port, and the lower positions of two ends of the radiator are respectively provided with an oil outlet.

The radiator upside is equipped with the exhaust hole, installs the exhaust bolt in the exhaust hole.

The radiator adopts a bent pipe type radiator.

Compared with the prior art, the invention has the following advantages:

(1) on the premise of not influencing the braking performance, the flow of the brake fluid from the brake caliper to the radiator is realized;

(2) the flow channel in the radiator can ensure the brake fluid to be fully radiated;

(3) the brake caliper can be cooled in time under the working condition that the brake is frequently used for a long time, meanwhile, the brake fluid can be prevented from boiling, the formation of air resistance is effectively prevented, and the driving safety of the loader is greatly improved;

(4) the brake system can be directly improved on the original loader dry-type bridge brake system, and is convenient to install, low in cost and easy to realize.

Drawings

FIG. 1 is a schematic diagram of a conventional loader dry axle braking system;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention;

FIG. 3 is a schematic view of a heat sink according to an embodiment of the present invention;

FIG. 4 is a schematic diagram illustrating the operation of an embodiment of the present invention;

in the figure: 100. a caliper body; 101. a brake piston; 102. a brake caliper piston chamber; 200. an outlet check valve; 300. an inlet check valve; 400. a heat sink; 401. an oil filler; 402. a partition plate I; 403. a partition plate II; 404. a brake fluid gallery; 500. an oil pipe; 600. a three-way joint; 601. an oil inlet end; 700. an exhaust bolt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, specific embodiments are described in detail below with reference to the accompanying drawings. The left front axle brake line of the loader is taken as an example for detailed description.

Referring to fig. 2 to 4, in the wheel loader brake pipe with a radiator, an inlet check valve 300 is installed at an oil inlet of a brake caliper body 100, and an outlet check valve 200 is installed at an oil outlet of the brake caliper body 100. An oil outlet of the radiator 400 is connected with the inlet one-way valve 300, and an oil return port of the radiator 400 is connected with the outlet one-way valve 200. Outlet check valve 200 may control brake fluid to flow only from caliper 100 to radiator 400. Inlet check valve 300 may control brake fluid to flow only from radiator 400 to caliper 100.

The oil filler 401 of the radiator 400 is connected to a high-pressure oil source. In this embodiment, the oil filler 401 of the heat sink 400 is connected to the oil pipe 500, the oil pipe 500 is connected to the three-way joint 600, and the oil inlet 601 of the three-way joint 600 is connected to the booster pump. The oil filling port 401 on the radiator 400 can also adopt other existing connection forms, and the three-way joint 600 can be omitted or replaced by other types of joints according to specific working conditions.

In this embodiment, the heat sink 400 includes a rectangular housing, and partitions i 402 and partitions ii 403 are alternately arranged in the rectangular housing. The partition plate I402 and the partition plate II 403 are horizontally arranged, oil through holes are formed in the middle of the partition plate I402, oil through holes are formed in the two ends of the partition plate II 403, and a brake fluid oil duct 404 is formed among the partition plate I402, the partition plate II 403 and the oil through holes, so that brake fluid can be fully radiated through a radiator. The upper positions of the two ends of the radiator 400 are respectively provided with an oil return port, the lower positions of the two ends of the radiator 400 are respectively provided with an oil outlet, and the symmetric structure improves the flowing and heat dissipation effects of brake fluid.

The upper side of the heat sink 400 is provided with an exhaust hole in which an exhaust bolt 700 is installed. The exhaust bolt 700 is tightened in a normal state, and when the brake system needs to exhaust, the exhaust bolt 700 is opened to exhaust the brake pipe.

In this embodiment, the heat sink 400 may also be an existing folded tube heat sink, or another heat sink.

The working process is as follows:

as shown in figure 4 of the drawings,

the brake fluid pressure in the caliper piston chamber 102 is P1, and the pressure in the radiator gallery 404 is P2;

when braking is not required, the brake fluid in the caliper piston chamber 102 and the brake fluid in the radiator chamber 404 are in a balanced state, i.e., P1= P2= 0;

when the loader needs braking in the working process, after a driver steps down on foot braking, the booster pump enables high-pressure brake fluid to enter the inner cavity of the radiator through the oil filling port 401 of the radiator, at the moment, P1 is smaller than P2, and the outlet one-way valve 200 is in a stop state. The high pressure brake fluid in the radiator brake fluid gallery 404 will flow into the caliper piston chamber 102 through the inlet check valve 300, causing the pressure P1 in the caliper piston chamber 102 to rise, thereby pushing the brake piston 101 to move outward until P1= P2, and the brake fluid in the caliper piston chamber 102 and the brake fluid in the radiator fluid gallery 404 will again return to a balanced state. The brake piston 101 extrudes the friction plate at a constant pressure to realize braking;

when the driver releases the foot brake, the booster pump can not provide high-pressure brake fluid any more, the pressure P2 of the inner cavity of the radiator is reduced to 0, and the inlet check valve 300 is in a cut-off state when P1> P2. The high pressure brake fluid in the caliper piston chamber 102 will enter the radiator chamber through the outlet check valve 200. The pressure P1 in the caliper piston chamber 102 drops, the brake piston 101 contracts inwards under the action of the rectangular rubber ring, and the brake fluid is squeezed into the radiator chamber through the outlet check valve 200 until the recovery P1= P2= 0;

thus, a working cycle is realized.

During the operation, the low-temperature brake fluid in the radiator 400 enters the brake caliper 100 during braking; the brake fluid having a high temperature in the caliper 100 enters the radiator 400 when the brake is released. The radiator 400 can radiate the high-temperature brake fluid, and can flow the low-temperature brake fluid into the brake caliper when braking next time. The circulation is repeated, so that the brake fluid can be effectively prevented from boiling, and the air resistance phenomenon is prevented;

during this operation, the brake fluid can take away heat transferred from the caliper 100, and also cool the caliper 100 when the low-temperature brake fluid enters the caliper 100, thereby improving braking performance.

The above-described examples are merely illustrative of preferred embodiments of the present invention and do not limit the scope of the present invention. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention.

Claims

1. A wheel loader brake pipe with a radiator comprises a brake caliper body (100), and is characterized in that: an inlet one-way valve (300) is installed at an oil inlet of the brake caliper body (100), and an outlet one-way valve (200) is installed at an oil outlet of the brake caliper body (100); the oil outlet of the radiator (400) is connected with the inlet one-way valve (300), the oil return port of the radiator (400) is connected with the outlet one-way valve (200), and the oil filling port (401) of the radiator (400) is connected with a high-pressure oil source;

the radiator (400) comprises a rectangular shell, and partition plates I (402) and partition plates II (403) are alternately arranged in the rectangular shell; the partition plate I (402) and the partition plate II (403) are horizontally arranged, an oil through hole is formed in the middle of the partition plate I (402), oil through holes are formed in the two ends of the partition plate II (403), and a brake fluid oil duct (404) is formed among the partition plate I (402), the partition plate II (403) and the oil through holes;

the upper positions of two ends of the radiator (400) are respectively provided with an oil return port, and the lower positions of two ends of the radiator (400) are respectively provided with an oil outlet; the oil return ports of the radiator (400) are connected to the outlet one-way valves (200) of the brake caliper bodies (100) on the same side, and the oil outlet ports of the radiator (400) are connected to the inlet one-way valves (300) of the brake caliper bodies (100) on the same side.

2. A wheel loader brake line with radiator according to claim 1, characterised in that: an oil filling port (401) on the radiator (400) is connected with a booster pump.

3. A wheel loader brake line with radiator according to claim 2, characterised in that: an oil filling port (401) on the radiator (400) is connected with an oil pipe (500), the oil pipe (500) is connected with a three-way joint (600), and an oil inlet end (601) of the three-way joint (600) is connected with the booster pump.

4. A wheel loader brake line with radiator according to claim 1, characterised in that: the upper side of the radiator (400) is provided with an exhaust hole, and an exhaust bolt (700) is installed in the exhaust hole.

5. A wheel loader brake line with radiator according to claim 1, characterised in that: the radiator (400) adopts a bent pipe type radiator.