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Start controls and excavators

A start-up control device and start-up control technology, applied in the field of machinery

Inactive Publication Date: 2017-10-27
CRRC SHENYANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a starting control device and an excavator. By using the starting control device, the starting load of the existing excavator engine can be reduced, and the difficulty of starting the engine can be reduced.

Method used

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  • Start controls and excavators
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Experimental program
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Effect test

Embodiment 1

[0017] figure 1 It is a schematic diagram of the start-up process of the start-up control device provided by Embodiment 1 of the present invention, figure 2 It is a schematic diagram of the start-up control device provided by Embodiment 1 of the present invention after start-up. Such as Figure 1 ~ Figure 2 As shown, the starting control device provided in this embodiment includes: a power supply 1 , a pilot travel switch 2 , a pilot bypass relay 3 and a pilot bypass solenoid valve 4 . Among them, the pilot bypass solenoid valve 4 is set between the output end of the pilot pump 5 and the oil pool 6, the controlled end of the pilot bypass solenoid valve 4 is connected to the power supply 1 through the pilot bypass relay 3, and the output of the pilot travel switch 2 The terminal is connected with the controlled terminal of the pilot bypass relay 3.

[0018] The pilot pump 5 can provide lower pressure hydraulic oil for loads such as operating rods, such as handles on mechani...

Embodiment 2

[0033] This embodiment provides an excavator. The excavator includes an engine, a pilot pump, an oil pool, a load, and the starting control device of the first embodiment above, wherein the engine is connected to the starting control coil 72 in the engine starting circuit, and the pilot pump 5 is connected to the starting control coil 72 in the engine starting circuit. A pilot bypass solenoid valve 4 is arranged between the oil pools 6, and the other end of the pilot pump 5 is connected to the load. Among them, the load can be the corresponding control system pipeline of the excavator or the control valve or solenoid valve in the operating handle, and the pilot pump 5 supplies oil to the control system pipeline to control the action of the corresponding main hydraulic control valve, thereby realizing Various actions of the excavator.

[0034] When the engine of the excavator provided by this embodiment is started, the pilot bypass solenoid valve in the start control device is ...

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Abstract

The invention provides a starting control device and an excavator. The starting control device provided by the invention includes: a power supply, a pilot stroke switch, a pilot bypass solenoid valve and a pilot bypass relay; the pilot bypass solenoid valve is arranged at the output end of the pilot pump Between the tank and the oil pool, the controlled end of the pilot bypass solenoid valve is connected to the power supply through the pilot bypass relay, and the output end of the pilot limit switch is connected to the controlled end of the pilot bypass relay; when the engine starts, the pilot bypass relay is energized , so that the pilot bypass solenoid valve is energized, so that the hydraulic oil of the pilot pump flows back to the oil pool; when the engine is started, the pilot travel switch controls the pilot bypass relay to be disconnected, so that the pilot bypass solenoid valve is closed. In the present invention, by setting the starting control device, when the engine is started, the pilot bypass solenoid valve is electrically activated, so that the hydraulic oil of the pilot pump flows back to the oil pool, reducing the starting load of the engine and reducing the difficulty of starting the engine.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a starting control device and an excavator. Background technique [0002] Excavators are one of the most important construction machinery in engineering construction, and have been widely used in various industries such as construction and water conservancy. Its power part is mainly composed of an engine and a hydraulic pump. The engine drives the oil pump to rotate. The pressure oil at the outlet of the oil pump is distributed to each working device through the working valve core. After the pressure oil does work, it returns to the oil tank at low pressure. [0003] When the engine of the excavator is started, in addition to the load (oil pump, fan, etc.), it must also overcome the frictional resistance of various parts, and at the same time drive the hydraulic pump to rotate and do work. The hydraulic pump in the excavator is connected to the pilot pump. When the engine is started, it d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F9/22
Inventor 赵春峰范俊勇徐敦辉崔永俊金茹芳孟香玉马勇范宏宇
Owner CRRC SHENYANG CO LTD