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Device for providing a pressure for a hydraulic consumer and method for providing a pressure

A pressure and hydraulic technology, applied in the field of devices that provide pressure for hydraulic loads, can solve problems such as slow pressure adjustment

Inactive Publication Date: 2011-07-13
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Of course, with the devices known in the technical background, the adjustment of the pressure has always been slow, so a relatively large pressure accumulator must be provided

Method used

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  • Device for providing a pressure for a hydraulic consumer and method for providing a pressure
  • Device for providing a pressure for a hydraulic consumer and method for providing a pressure
  • Device for providing a pressure for a hydraulic consumer and method for providing a pressure

Examples

Experimental program
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Effect test

Embodiment Construction

[0025] figure 1 A hydraulic system is shown with a hydraulic load 2 and a device 1 for generating pressure for an electrical load 2 . The device has a tank 4 , a hydraulic pump 3 , a throttle valve 15 , a non-return valve 12 , a pressure receiver 9 and a regulating device 11 . The regulating device 11 contains a frequency converter 8 , an electric motor 6 and an external fan 10 . The task of the external fan 10 is to cool the electric motor 6 .

[0026] Tank 4 contains a hydraulic fluid, for example a hydraulic oil, with which hydraulic pump 3 , which is designed as a metering pump according to the extruder principle, is supplied with fluid. The pressure p is provided at the outlet 5 of the pump 3 by means of hydraulic oil delivered at the outlet 5 0 , this pressure is used to operate hydraulic load 2. A one-way valve 12 is provided between the outlet 5 of the hydraulic pump 3 and the connector of the hydraulic load 2 marked P. This non-return valve is arranged in such a...

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PUM

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Abstract

The invention relates to a device for providing a pressure for a hydraulic consumer (2), wherein the device (1) has a tank (4) for providing hydraulic fluid. A hydropump (3) is fed from the tank (4), and is equipped for providing a pressure (p0) at the outlet (5) thereof. An electric motor (6) is provided for actuating the hydropump, and a pressure transmitter (9) serves for displaying the pressure (p0) put out by the hydropump (3). A frequency converter is provided for receiving the signal displayed by the pressure transmitter (9), wherein the frequency converter (8) is equipped for regulating the pressure (p0) provided by the hydropump (3) by means of actuating the rotational speed of the electric motor (6). The frequency converter (8) actuates the electric motor (6) without any sensors by means of a vector regulator.

Description

technical field [0001] The present invention relates to a device for providing pressure to a hydraulic load, and a method for providing pressure to a hydraulic load. Background technique [0002] Hydraulic loads such as injection cylinders, forming cylinders or screw motors must be supplied with hydraulic fluid at a predetermined pressure. Especially when such loads require a large amount of pressure medium in each case for a short period of time, the regulation of the supplied pressure must react accordingly quickly. In DE 199 58 256 B4 the pressure accumulator is actuated by comparing the actual pressure in the accumulator with the nominal pressure and changing the rotational speed of the drive motor accordingly. Of course, with the devices known from the prior art, the adjustment of the pressure is always slow, so that a relatively large pressure accumulator must be provided. Contents of the invention [0003] It is therefore the object of the present invention to pro...

Claims

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Application Information

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IPC IPC(8): F15B1/02
CPCF15B2211/615F15B2211/6309F15B11/00F15B2211/20515F15B2211/625F15B2211/212F15B2211/20538F15B2211/30505F15B2211/62
Inventor T・格尔纳
Owner ROBERT BOSCH GMBH
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