Cooling system of battery-powered electric hydraulic excavator

A hydraulic excavator and cooling system technology, applied in the direction of earth mover/shovel, construction, etc., can solve the problems of power consumption, reduce the working time of a single charge of the machine, and high noise, so as to reduce cooling and reduce noise Radiation, the effect of reducing power loss

Active Publication Date: 2017-05-31
GUANGXI YUCHAI HEAVY IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional electro-hydraulic excavators use a separate motor to drive a fan to cool the controller and hydraulic oil. Regardless of the temperature, the fan always rotates at the rated speed, making noise and consuming electricity.
However, in the early stage of machine operation or when the work intensity is not high, the temperature of the machine is not high and there is no need to cool it. At this time, the fan rotation is a waste of power, which greatly reduces the working time of the machine on a single charge.

Method used

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  • Cooling system of battery-powered electric hydraulic excavator
  • Cooling system of battery-powered electric hydraulic excavator
  • Cooling system of battery-powered electric hydraulic excavator

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Embodiment Construction

[0028] The technical solution of the present invention will be further described with reference to the accompanying drawings.

[0029] Such as Figure 1 to Figure 4 As shown, the cooling system of the battery-powered electric hydraulic excavator according to the present invention includes 1 excavator platform, 2 motors, 3 water pipes I, 4 water pipes II, 5 hydraulic systems, 6 DC / DC, 7 water temperature sensors, and 8 motor controls 9 Water pipe III, 10 Water pump, 11 Water pipe IV, 12 Hydraulic oil radiator, 13 Coolant radiator, 14 Wind guide cover, 15 Cooling fan, 16 Controller, the specific structure and connection method are:

[0030] The motor is installed on the left front of the excavator platform to provide power for the hydraulic system; the DC / DC and the motor controller share the same cooling plate and is installed above the motor; the water pump is installed on the left rear of the excavator platform, at the center of the excavator platform near the radiator Side;...

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Abstract

Disclosed is a cooling system of a battery-powered electric hydraulic excavator. Cooling liquid of the cooling system is driven to flow by an electric water pump, flows out of a cooler and returns to the cooler after passing through a motor controller and a motor. The direct-current motor is used for driving fans, and an air draft type cooling mode is adopted. A cooling liquid radiator is in parallel connection with a hydraulic oil radiator to form the parallel connection type cooler. Flow rate of the cooler is brought away by air. The direct-current motor is controlled by the controller intelligently and can be set by taking cooling liquid temperature, motor temperature, motor controller temperature and hydraulic oil temperature as control conditions to control turn-on of different fans and rotating speed of the fans, and the fans cannot rotate or run at low rotating speeds when the cooling liquid and the hydraulic oil are low in temperature, so that low-noise, high-efficiency and energy-saving cooling effects are achieved.

Description

technical field [0001] The invention relates to a cooling system of a battery-powered electric hydraulic excavator, which is used for cooling the motor, motor controller, DC / DC and hydraulic system of the battery-powered electric hydraulic excavator. Background technique [0002] With the development and application of battery-powered electric hydraulic excavators, because the entire machine is powered by batteries, how to save electricity has become the key to the long-lasting working time of the machine on a single charge. Traditional electro-hydraulic excavators use a separate motor to drive a fan to cool the controller and hydraulic oil. Regardless of the temperature, the fan always rotates at the rated speed, making noise and consuming electricity. However, when the machine is in the early stage of operation or when the work intensity is not high, the temperature of the machine is not high and there is no need to cool it. At this time, the rotation of the fan is a waste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F9/08
CPCE02F9/0866
Inventor 黄井泉黄平黄雁飞梁悦斌林坤张海俊莫有瑜唐拥军潘国远
Owner GUANGXI YUCHAI HEAVY IND
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