Brake hub cooling device for mining dump truck

Abstract

The utility model discloses a cooling device for a brake hub of a mining dump truck. A cooler is arranged in a cooling water tank for containing cold water. The cooler comprises tubes, the front ends of the tubes are communicated with air inlet headers, and the rear ends of the tubes are communicated with air outlet headers. An air inlet pipe of the high-pressure fan is connected with an air collecting hood, and an air outlet pipe is connected with an air inlet header. The air outlet collecting pipe is connected with a main air pipe, an electromagnetic valve is installed on the main air pipe, and a power line used for supplying power to the electromagnetic valve is connected with a switch button located in a cab of the mining dump truck. The tail end of the main air pipe is connected with four branch air pipes, and the tail ends of the branch air pipes are connected with air nozzles for blowing air to cool the brake blower. According to the utility model, the brake hub is cooled through low-temperature airflow, so that the temperature and heat attenuation effect abrasion of the brake hub are reduced, the service life is prolonged, the reliability of a brake system is ensured, and the driving safety is improved.

Description

Technical Field

[0001] The utility model relates to a spray cooling device, in particular to a brake hub spray cooling device. Background Art

[0002] In recent years, in the field of mining production, the task of transporting ore and crushed stone by mining dump trucks has been continuously increasing. Due to the relatively complex operation scenarios, short transfer distances, frequent starts and stops, especially in some loading locations with continuous slopes, the braking demand of mining dump trucks is relatively large.

[0003] In these sections, the brake hubs of mining dump trucks will overheat due to continuous braking, weakening the braking ability and causing relatively serious traffic accidents, and even the situation of tire fires. Generally, it is considered that the friction pads on the brake pads heat up quickly. Generally, the temperature of non - continuous braking brake pads is about 130°C, and the temperature rises sharply during long - distance continuous braking, about 200 - 300°C. If it exceeds the test limit of 350°C, the braking ability may be lost, posing a great safety hazard; too high temperature is the main reason for the decline of brake pads, directly affecting the braking efficiency. Therefore, the cooling of brake pads becomes particularly important.

[0004] Most traditional cooling devices cool the brake hub by spraying cooling water. However, in some weather conditions, such as cold winters, using this method, the cooling water will flow onto the road surface, causing icing and slippery conditions, which are likely to cause traffic accidents. On the other hand, when water contacts the relatively hot brake hub, due to the large temperature difference, the water evaporates instantaneously, the temperature of the brake assembly drops sharply, and the brake pads deform, affecting the braking performance. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a cooling device for the brake hub of a mining dump truck, which cools the brake hub by using low - temperature air flow.

[0006] To solve the above - mentioned technical problem, the utility model adopts the following technical solutions:

[0007] Brake hub cooling device for mining dump truck. The mining dump truck includes a front axle and a rear axle. Brake pads and brake drums are respectively installed at the left and right ends of the axles. The device further includes jet nozzles for blowing cold air to cool the brake drums. The jet nozzles are correspondingly installed on the side parts of the brake drums. The cooling device also includes a cooling water tank for containing cold water, and a cooler is installed inside the cooling water tank. The cooler includes tube bundles. The front end of the tube bundles is connected to an air inlet header, and the rear end is connected to an air outlet header. In the cooling water tank, the channels formed by the tube bundles, the air inlet header and the air outlet header are used as heat exchange tube passes for air flow, and the space outside the tube bundles, the air inlet header and the air outlet header is used as a heat exchange shell pass for water. The cooling device further includes a high-pressure fan. The intake pipe of the high-pressure fan is connected with an air collecting hood, and the outlet pipe is connected to the air inlet header. The air outlet header is connected with a main air pipe. An electromagnetic valve is installed on the main air pipe. A switch button located in the cab of the mining dump truck is connected to the power supply wire for supplying power to the electromagnetic valve. The end of the main air pipe is connected with four branch air pipes, and the ends of the branch air pipes are correspondingly connected to the jet nozzles.

[0008] Preferably, the air collecting hood is directly opposite to the air outlet of the exhaust pipe of the mining dump truck.

[0009] Preferably, a water filling valve and a pressure relief valve are respectively installed on the upper side of the cooling water tank, and a drain valve is installed on the lower side.

[0010] Preferably, the cooling device further includes a temperature display installed in the cab of the mining dump truck. The main air pipe is connected with a temperature sensor that communicates with the temperature display.

[0011] The positive effects of the present utility model are as follows:

[0012] First, the present utility model cools the brake hub through low-temperature air flow, reduces the temperature of the brake hub and the wear caused by the thermal attenuation effect, extends the service life, ensures the reliability of the braking system, and improves the driving safety.

[0013] Second, the present utility model uses a high-pressure fan as the power source and reduces the air flow temperature through the heat exchange of air and water. The brake hub is cooled by the low-temperature air flow. On the one hand, there is no water splashing during the cooling process of the brake hub, so the problem of road icing and wetness will not occur. On the other hand, the problem that the sharp temperature drop of the brake components caused by the evaporation of water in contact with the high-temperature brake hub affects the braking performance is avoided.

[0014] Third, the present utility model uses the impact force of the vehicle exhaust gas air flow as an auxiliary power source and cools the vehicle exhaust gas. On the one hand, the energy consumption of the fan is saved, and on the other hand, the thermal pollution degree of the exhaust gas is reduced. Description of the Drawings

[0015] Figure 1It is a schematic structural diagram of an embodiment of the present utility model.

[0016] Explanation of reference numerals in the drawings: 1, axle; 2, brake pads; 3, brake drum; 4, jet nozzle; 5, branch air pipe; 6, main air pipe; 7, solenoid valve; 8, switch button; 9, power cord; 10, cooling water tank; 10-1, water filling valve; 10-2, drain valve; 10-3, pressure relief valve; 11, cooler; 11-1, tube bundle; 11-2, inlet header; 11-3, outlet header; 12, high-pressure fan; 13, air collecting hood; 14, temperature sensor. Specific implementation manner

[0017] The present utility model will be further described below with reference to the drawings and embodiments.

[0018] An embodiment of the brake hub cooling device for a mining dump truck of the present utility model includes a cooling water tank 10 for being installed on the lower side of the carriage and for containing cold water, and a cooler 11 is installed inside the cooling water tank 10. The cooler 11 includes a tube bundle 11-1, the front end of the tube bundle 11-1 is communicated with an inlet header 11-2, and the rear end is communicated with an outlet header 11-3. Inside the cooling water tank 10, the channels formed by the tube bundle 11-1, the inlet header 11-2, and the outlet header 11-3 are used as heat exchange tube passes for gas flow, and the space outside the tube bundle 11-1, the inlet header 11-2, and the outlet header 11-3 (including the tube bundle gaps) is used as a heat exchange shell pass for containing water.

[0019] Further, a water filling valve 10-1 and a pressure relief valve 10-3 are respectively installed on the upper side of the cooling water tank 10, and a drain valve 10-2 is installed on the lower side.

[0020] This embodiment further includes a high-pressure fan 12 located and installed on the lower side of the carriage, and the high-pressure fan selects a high-pressure vortex fan. The intake pipe of the high-pressure fan 12 is connected with an air collecting hood 13, and the outlet pipe is connected with the inlet header 11-2. The outlet header 11-3 is connected with a main air pipe 6. A solenoid valve 7 is installed on the main air pipe 6, and a switch button 8 located in the cab of the mining dump truck is connected to the power cord 9 for supplying power to the solenoid valve 7. The power cord 9 is connected to the vehicle-mounted power supply. The air supply end of the main air pipe 6 is connected with four branch air pipes 5 whose ends are respectively communicated with jet nozzles 4. The mining dump truck includes an axle 1 at the front and rear respectively, and brake pads 2 and brake drums 3 are respectively installed at the left and right ends of the axle 1. The jet nozzles 4 are correspondingly installed on the side of the brake drum 3 for blowing air to cool down the brake drum 3.

[0021] Further, this embodiment further includes an exhaust pipe of the mining dump truck, and the air collecting hood 13 is directly opposite to the air outlet of the exhaust pipe. The gas discharged from the exhaust pipe is blown into the high-pressure fan 12 through the air collecting hood 13 and enters the cooler 11 through the outlet pipe.

[0022] During the continuous downhill process of a mining dump truck, the vehicle driver turns on the solenoid valve 7 through the switch button 8 to cool the brake drum by means of air flow.

[0023] The embodiment of the present utility model further includes a temperature display installed in the cab of the mining dump truck, and the main air pipe 6 is connected with a temperature sensor 14 that communicates with the temperature display. The temperature sensor 14 collects the air flow temperature in the main air pipe 6 and displays it on the temperature display. If the displayed temperature is too high, the vehicle driver first cuts off the air path through the switch button 8, and then cools the water in the cooling water tank 10. The specific operation method is to open the drain valve 10-2, drain the hot water, and then open the water filling valve 10-1 to add cold water to the cooling water tank 10.

[0024] The function of the above embodiments is to elaborate in detail the structure, shape, usage method, etc. of the present utility model. They are only partial embodiments, not all, and therefore do not limit the protection scope of the present utility model.

Claims

1. Cooling device for brake hub of mining dump truck. The mining dump truck includes a front axle (1) and a rear axle (1). Brake pads (2) and brake drums (3) are respectively installed at the left and right ends of the axles (1). It further includes jet nozzles (4) for blowing air to cool the brake drums (3). The jet nozzles (4) are correspondingly installed on the side of the brake drums (3). It is characterized in that: The cooling device further includes a cooling water tank (10) for containing cold water, and a cooler (11) is installed inside the cooling water tank (10); the cooler (11) includes a tube bundle (11-1), the front end of the tube bundle (11-1) is communicated with an intake header (11-2), and the rear end is communicated with an exhaust header (11-3); in the cooling water tank (10), the channels formed by the tube bundle (11-1), the intake header (11-2) and the exhaust header (11-3) are used as the heat exchange tube passes for gas flow, and the space outside the tube bundle (11-1), the intake header (11-2) and the exhaust header (11-3) is used as the heat exchange shell pass for containing water; the cooling device further includes a high-pressure blower (12), the intake pipe of the high-pressure blower (12) is connected with a gas collecting hood (13), and the exhaust pipe is connected with the intake header (11-2); the exhaust header (11-3) is connected with a main gas pipe (6); a solenoid valve (7) is installed on the main gas pipe (6), and a switch button (8) located in the cab of the mining dump truck is connected to the power supply line (9) for supplying power to the solenoid valve (7); the end of the main gas pipe (6) is connected with four branch gas pipes (5), and the ends of the branch gas pipes (5) are correspondingly connected with the jet nozzles (4).

2. The brake hub temperature reduction device for a mining dump truck according to claim 1, characterized in that: The gas collecting hood (13) is directly opposite to the outlet of the exhaust gas discharge pipe of the mining dump truck.

3. The brake hub cooling device for a mining dump truck according to claim 1, characterized in that: A water filling valve (10-1) and a pressure relief valve (10-3) are respectively installed on the upper side of the cooling water tank (10), and a drain valve (10-2) is installed on the lower side.

4. The brake hub cooling device for mining dump trucks as described in claim 1 or 2 or 3, characterized in that: The cooling device further includes a temperature display for installation in the cab of the mining dump truck; the main gas pipe (6) is connected with a temperature sensor (14) that communicates with the temperature display.

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