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an excavator

A technology for excavators and fuselages, applied in the field of construction machinery, can solve problems such as inability to work, damage to the first two-position two-way solenoid valve, second two-position two-way solenoid 5, etc., to save energy, realize energy recovery, and ensure safety effect

Active Publication Date: 2022-04-29
鸿程电子工业(南通)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a real working environment, there will be situations where the first two-position two-way solenoid valve 4 and the second two-position two-way solenoid valve 5 are damaged and unable to work

Method used

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  • an excavator
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The oil outlets of the third electromagnetic valve 6 and the fourth electromagnetic valve 7 and the oil inlet of the fifth electromagnetic valve 9, the oil outlet of the fifth electromagnetic valve 9 are connected to the oil tank 1, and the first oil circuit 101 Cartridge valve 2 14 and seventh solenoid valve 15 are sequentially connected with the rod cavity of the boom cylinder 8, and the first oil circuit 101 is connected with the three-position four-way electromagnetic valve between the first oil circuit 101 and the rodless cavity of the boom cylinder 8 Valve two 13, the three-position four-way solenoid valve one 10 is connected between the second oil circuit 102 and the rod chamber of the boom cylinder 8, the connection between the second oil circuit 102 and the rodless chamber 1 of the boom cylinder 8 Cartridge valve one 11 and sixth solenoid valve 12 are sequentially connected between them. The three-position four-way solenoid valve two oil port A1 of the three-pos...

Embodiment 2

[0033] On the basis of the first improved embodiment above, this embodiment is improved as follows, the three-position four-way solenoid valve two oil port three C1 and the three-position four-way solenoid valve one oil port three C2 are connected to the flow regulating valve 16 The oil port one A3 of the flow regulating valve, the second oil port three C1 of the three-position four-way solenoid valve and the one oil port three C2 of the three-position four-way solenoid valve are also connected to a port of the three-position two-way solenoid valve 17, and the The other port of the three-position two-way solenoid valve 17 is connected to the accumulator two 26, the flow regulating valve oil port two B3 of the flow regulating valve 16 is connected to the oil tank 1, and the flow regulating valve oil port three C3 is connected to the first overflow valve 18 and the two-position four-way solenoid valve oil port A4 of the two-position four-way solenoid valve 19, the first overflow ...

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PUM

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Abstract

The invention discloses an excavator. The arrangement of the application can ensure the normal operation of the boom cylinder when one of the first solenoid valve 4 or the second solenoid valve 5 is damaged. Because when the state of the boom oil cylinder is switched, whether it is in the normal state or when the first solenoid valve 4 and the second solenoid valve 5 are damaged, the first oil circuit 101 and the second oil circuit 102 are subject to a large oil pressure impact. Therefore, the arrangement of the present application can also ensure the stability of the first oil passage 101 and the second oil passage 102, thereby further ensuring the safety of the hydraulic system. The above-mentioned arrangement of the present application can increase the pressure of the oil stored in the accumulator, thereby achieving the effect of energy recovery and energy saving compared with common accumulator energy storage.

Description

technical field [0001] The invention belongs to the field of engineering machinery, and in particular relates to an excavator. Background technique [0002] Excavator, also known as excavating machinery (excavating machinery), also known as excavator, is an earthmoving machine that uses a bucket to dig materials higher or lower than the bearing surface, and loads them into transport vehicles or unloads them to the stockyard. The materials excavated by the machine are mainly soil, coal, sediment, and pre-loose soil and rock. [0003] Such as figure 1 Shown is an excavator 100 in the prior art, wherein the boom cylinder 8 is used for raising and lowering the boom, and its working safety and stability are crucial to the digging device of the excavator. [0004] Such as figure 2 , 3 As shown, the oil circuit for driving the boom cylinder 8 in the prior art includes a fuel tank 1, a filter 2, a hydraulic pump 3 and four two-position two-way solenoid valves, and the four two-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F3/28E02F3/42
CPCE02F3/28E02F3/42E02F3/425E02F3/435
Inventor 程伟
Owner 鸿程电子工业(南通)有限公司