Distributed heat dissipation system of engineering machinery

Abstract

A distributed heat dissipation system of engineering machinery comprises a frame, a cab, a rear hood and a heat dissipation system. The heat dissipation system comprises a hydraulic torque converter heat dissipation unit, a hydraulic oil heat dissipation unit, an intercooler air cooling heat dissipation unit and a water cooling heat dissipation unit. Each of the hydraulic torque converter heat dissipation unit, the hydraulic oil heat dissipation unit, the intercooler air cooling heat dissipation unit and the water cooling heat dissipation unit comprises a box body, a heat dissipation pipe located in the box body and a fan installed on the box body, the two ends of the heat dissipation pipe extend out of the box body to form a medium inlet and a medium outlet respectively, and the fan is arranged on a side plate of the box body; a cavity is formed between the rear hood and the rack, and at least two of the hydraulic torque converter heat dissipation unit, the hydraulic oil heat dissipation unit, the intercooler air cooling heat dissipation unit and the water cooling heat dissipation unit are located in the cavity. Each heat dissipation unit works independently, the working power of each heat dissipation unit is set according to the heat dissipation requirements of different heat dissipation systems, the manufacturing cost is reduced, and meanwhile, the energy consumption of the loader during working is reduced.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to a distributed cooling system for construction machinery. Background technique [0002] As a construction machinery for shoveling materials, loaders are widely used in construction projects such as highways, railways, construction, hydropower, ports, and mines. [0003] Due to the large workload of the loader, strong randomness, many and changeable heat sources, poor working environment and other unfavorable factors, the loader will generate a lot of heat during the operation. Overheating will occur, affecting the normal operation of the loader, and even causing damage to the parts. [0004] The cooling system of the loader consists of the engine water cooling system, the engine intercooling cooling system, the hydraulic transmission cooling system and the hydraulic device cooling system. At present, all large loaders in our country adopt the forced cooling meth...

AI Technical Summary

Problems solved by technology

At present, large-scale loaders in my country use forced heat dissipation, and their fans are directly driven by the engine. Because the fan speed is restricted by the engine speed, it cannot be adjusted according to the heat dissipation requirements, and because the space and location for installing these systems are limited, the heat dissipation systems are separated. There is a complex coupling relationship, which brings certain difficulties to the design and installation of the cooling system

[0005] Specifically: 1. Under the normal working conditions of the loader, due to the working characteristics of the fan itself, the heat dissipation effect of the engine area corresponding to the center area of ​​the fan is far less than that of the fan blade area, that is, the heat dissipation area of ​​the fan is uneven.

At the same time, the temperature of the cooling medium of the above four heat dissipation systems of the loader is different, so the required heat dissipation air volume is also different. A fan directly connected to the engine is used to dissipate heat from the four heat dissipation systems of the loader at the same time, in order to achieve Good heat dissipation effect can only be based on the maximum air volume required by the four major heat dissipation systems as the working condition. The heat dissipation capacity of this heat dissipation method is generally too large, which not only increases the manufacturing cost but also wastes materials.

[0006] 2. When the ambient temperature is low and the loader has just started, etc., the heat dissipation intensity required by the system is usually small, and sometimes the fan is not even required to work. However, when the fan is directly connected to the engine and no appropriate control system is attached, it will often cause Unnecessary waste of energy, which may even adversely affect components due to cooling system temperatures that are too low

[0007] 3. The hydraulic transmission cooling system and the hydraulic device cooling system in the four major cooling systems of the loader have to be connected from the bottom of the cab to the rear hood in order to adapt to the fan directly connected to the engine, which requires longer pipelines and increases Difficulty of piping for loader pipelines

[0008] To sum up, the heat dissipation capacity of the current heat dissipation system of the loader is too large, and it cannot be set according to the actual heat dissipation needs of each heat dissipation system, resulting in high manufacturing costs and working energy consumption of the loader.

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