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Hydraulic device for working machines and method for hydraulic device

A technology of equipment and machinery, applied in mechanical equipment, earth movers/shovels, fluid pressure actuating devices, etc., can solve problems such as expensive structures and achieve the effect of reducing costs

Active Publication Date: 2020-10-16
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A disadvantage of the known solutions is that they are complex in terms of equipment technology

Method used

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  • Hydraulic device for working machines and method for hydraulic device
  • Hydraulic device for working machines and method for hydraulic device
  • Hydraulic device for working machines and method for hydraulic device

Examples

Experimental program
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Embodiment Construction

[0035] figure 1 A hydraulic device 1 for an excavator is shown. The hydraulic installation has a first consumer 2 in the form of a hydraulic machine for a swivel mechanism of an excavator and a second consumer 4 with two hydraulic cylinders. For energy recovery, the two consumers 2 , 4 are fluidically connected to a hydraulic machine 6 which is mechanically coupled via a transmission 8 to a flywheel 10 . On the one hand, the flywheel 10 can be driven by the hydraulic machine 6 and, on the other hand, the flywheel 10 can drive the hydraulic machine 6 in order to reuse the recovered energy for the second consumer 4 . For supplying the consumers 2 and 4 with pressure medium, two supply units 12 and 14 are provided, which are designed as pivotable hydraulic pumps. The supply units can be driven by the drive unit 16 via a common drive shaft. In addition to consumers 2 and 4, two further consumers 18 and 20, each in the form of a hydraulic cylinder, are provided. The consumers ...

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PUM

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Abstract

A hydraulic arrangement for a work machine and a process for a hydraulic arrangement comprising a first hydraulic consumer 2, in the form of a motor, for a slewing gear of a work machine, such as excavator, and a second hydraulic consumer 4, in the form of a cylinder, for an arm of the work machine. When the slewing gear is braked and when the arm is lowered, a flywheel 10 can be driven by a pivotable hydraulic machine 6 to recover the energy and as both consumer units are in active communication with the flywheel the energy can be recovered simultaneously. The arrangement is configured in such a way that the energy stored in the flywheel 10 is then usable to drive movement of the arm through the action of machine pivotable hydraulic machine 6 but is not useable for the slewing gear.

Description

technical field [0001] The invention relates to a hydraulic device with a flywheel for energy storage according to the preamble of claim 1 . Furthermore, the invention relates to a method for energy recovery of such hydraulic installations. Background technique [0002] A hydraulic device of this type is known from document SU 1382920 A1. Here, a flywheel is provided for energy storage. [0003] Another embodiment of a hydraulic device with a flywheel is disclosed in document RU 2 237 135 C1. In this case, a hydraulic motor can be driven by the consumer, which in turn drives the flywheel. A hydraulic pump as source of pressure medium can be driven by means of the flywheel. [0004] A disadvantage of the known solutions is that they are complex in terms of equipment engineering. Contents of the invention [0005] Accordingly, the object of the present invention is to provide a hydraulic system which overcomes the mentioned disadvantages. Furthermore, it is the object ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B21/14E02F9/22
CPCE02F9/128E02F9/2217E02F9/2292E02F9/2296F15B21/14F15B2211/20507F15B2211/20569F15B2211/41581F15B2211/426F15B2211/7058F15B2211/7135F15B2211/7142F15B2211/763F15B2211/88
Inventor B.切莱斯
Owner ROBERT BOSCH GMBH