Secondary cooling device of hydraulic excavator engine and regulating method thereof

Abstract

The invention relates to a secondary cooling device of a hydraulic excavator engine, wherein the secondary cooling device comprises an inlet temperature sensor, a temperature control switch, a water inlet pipe, a heat exchanger, a fan, a wind guide cover, a water outlet pipe, an outlet temperature sensor, a backflow pipe, a backflow water pump and a water supply tank, wherein the device is provided with a cooling device with the backflow pipe, a heat radiation system with variable heat radiation amount for the engine of the secondary cooling device and an individual cycle system of cooling water in a heat radiator. The invention also provides a regulating method of the secondary cooling device of the hydraulic excavator engine, the variable regulation and control on heat radiation capability of an excavator motive power system is realized through the secondary cooling device; the cooling water can flow back into a heat exchanger for recycling through the detecting the temperature of the engine cooling water by the temperature sensor, and optimal temperature for the operation of the engine is ensured. Through changing the cycle modes of the engine cooling water in the engine, or in the engine and the heat radiator, the cooling water can be subjected to cycled temperature reduction in the heat radiator, and the secondary cooling device is much practical.

Description

technical field [0001] The invention relates to a hydraulic excavator engine cooling device and a using method thereof, in particular to a hydraulic excavator engine secondary cooling device and an adjusting method thereof. Background technique [0002] Hydraulic excavators are widely used in many fields of national economic construction, especially in Inner Mongolia, Xinjiang, Shanxi and other places in the north of my country, which have rich mineral resources. Frequency of use. The engine is one of the key components of the hydraulic excavator, and the cooling system is an important part of the engine. Its function is to make the engine run in a suitable temperature range, so that the whole machine has excellent power performance, economic performance, and emission performance. and operational reliability. In the working environment such as open-pit coal mines and quarries, it is exposed to direct sunlight in summer, and there is no effective shelter around, and the surf...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a cooling system with variable heat dissipation capacity, which can selectively increase the heat dissipation capacity of the excavator cooling system according to the ambient temperature conditions through the secondary cooling device, so as to solve the problem of high temperature of the engine

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