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low-noise hydraulic equipment

A hydraulic equipment, low-noise technology, applied in the direction of mechanical equipment, sound-generating equipment, liquid variable capacity machinery, etc., to achieve the effects of low cost, easy to supplement equipment, and environmental protection advantages

Active Publication Date: 2018-11-13
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is also a fire hazard

Method used

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Examples

Experimental program
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Embodiment Construction

[0026] exist figure 1 The hydraulic system shown in shows a U-shaped storage container 1 for hydraulic pressure medium, which is arranged on a base plate 2 . The storage container forms three side walls 3 , 4 and 5 of a rectangular frame, the bottom of which is formed by the base plate 2 . The side walls 3 , 4 and 5 are designed as double walls and are welded to the base plate 2 . This results in a cavity for receiving the hydraulic pressure medium which additionally has a sound-damping effect. Towards a fourth side, not shown, the storage container 1 has a sound-absorbing sound-insulating wall. Looking upwards, the storage container 1 is closed by a sound-absorbing sound-insulating wall 6 . A closed housing 25 is formed by the side walls 3 - 5 , the non-illustrated sound insulation wall, the base plate 2 and the sound insulation wall 6 .

[0027] Arranged inside the housing 25 is a motor-pump unit 7 with an air-cooled electric motor and a pump 8 driven by the electric mot...

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Abstract

A low-noise hydraulic device is provided. The low-noise hydraulic device comprises a motor pump unit. The motor pump unit comprises a pump, and a motor driving the pump. The motor pump unit is disposed in a closed shell formed by a plurality of walls. One or more of the walls form(s) a closed double-wall frame. The inner cavity of the frame is a storage container for a hydraulic pressure medium. One or more of other walls form(s) a sound insulation wall. The one or more of the walls has or have surfaces reflecting sounds. Before one or more of the surfaces reflecting the sounds, a hole wall completely or partially covers the surfaces reflecting the sounds are arranged at a distance, and is provided with a plurality of through holes having a hole cross section less than 0.3 mm<2> which are distributed in the surface of the hole wall.

Description

technical field [0001] The invention relates to a low-noise hydraulic device with a motor-pump unit consisting of a pump and an electric motor driving the pump, wherein the motor-pump unit is arranged in a closed In the housing, and one or more of the walls form a closed double-walled frame, the inner cavity of the frame is a storage container for hydraulic pressure medium, and one or more of the other walls are configured as Sound insulating walls, and wherein one or more of the walls has a sound reflecting surface at the inside of its housing. Background technique [0002] In such low-noise hydraulic systems, it is known to form double-walled frames in a U-shape. The motor pump unit and possibly smaller pumps and the electric motor driving the pump for the cooling circuit as well as other components in the housing generate a high level of noise, which is partly conveyed to it by the storage tank containing the hydraulic pressure medium. is subtracted when passed out. Ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B53/00F04B17/03
CPCG10K11/172F04B53/002
Inventor B.默尔茨S-G.巴克豪斯
Owner ROBERT BOSCH GMBH