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Hydraulic device and its control method

A hydraulic device and hydrostatic technology, applied in the field of hydraulic devices, can solve problems such as shaft seal damage, bearing damage, and pressure medium temperature rise.

Active Publication Date: 2018-07-24
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This has the disadvantage that the extruder or the device can pass unnoticed by an increase in the temperature of the pressure medium into an impermissible operating range in which, for example, a sealing, in particular a shaft sealing, is about to take place. Damage and damage to bearings inside the extruder

Method used

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  • Hydraulic device and its control method
  • Hydraulic device and its control method
  • Hydraulic device and its control method

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Embodiment Construction

[0094] according to figure 1 , the hydraulic unit 1 has a speed-adjustable drive machine 2, which is coupled via a drive shaft arrangement 4 to a hydrostatic extruder (Verdrängermaschine) 6 constructed as an internal gear machine, which has a constant discharge volume and is in fluid communication with a pressure medium pool constructed as a tank via the low-pressure line 8 . The working connection of the extruder 6 can be fluidically connected via a working line 10 to a hydraulic load (not shown) for supplying it with pressure medium. A pressure detection mechanism 12 is connected to the working pipeline 10 . Furthermore, the device 1 has a temperature detection device 14 with a sensor 16 which is immersed in the housing interior of the extruder 6 . In addition, the device 1 has a rotational speed detection mechanism (not shown), through which the current rotational speed n of the driving machine 2 and the extruder 6 can be detected act .

[0095] The hydraulic system 1 h...

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Abstract

The invention discloses a hydraulic assembly with a variable-speed drive engine and a hydrostatic extruding machine driven by the drive engine. The device has a temperature sensing device through which a pressure medium temperature of an internal leak near a leakage gap is detected, so that deviations from acceptable operating ranges of the device or the extruding machine can be identified or determined as a function of the detected pressure medium temperature. In addition, a method for controlling the hydraulic assembly is disclosed.

Description

technical field [0001] The invention relates to a hydraulic device and a method for controlling such a device. Background technique [0002] Increasingly, hydraulic installations or plants for supplying pressure medium to at least one hydraulic load having a press or hydraulic press, in particular with a constant displacement volume, and a comparable Coupled, speed-adjustable drive machine. The extruder generally does not have a leakage connection, so that the internal leakage flow from the high-pressure space or its hydrostatic working space to the low-pressure space is drawn back into the housing of the extruder. Since the pressure medium is reduced from the high working pressure in the working space to a lower pressure in the case of an internal leak via a leakage gap, heat is released in the leakage gap, whereby the pressure medium heats up. In this case, this heat basically depends on the working pressure. In the case of the already mentioned no leakage connection, b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B49/20F04C2/10F04C14/28
CPCF04C2/101F04C14/08F04C14/26F04C14/28F04C15/0046F04C15/0096F04C2270/052F04C2270/19F04C2270/80
Inventor R·克内尔
Owner ROBERT BOSCH GMBH