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Regulating device for hydrostatic pumps and hydrostatic pumps

A hydrostatic and regulating equipment technology, applied in mechanical equipment, pumps, pump control, etc., can solve problems such as reducing pump efficiency

Active Publication Date: 2017-07-14
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] A disadvantage of such regulating devices for hydrostatic pumps is that, for the switching position with increased power, a hydraulic oil flow "branched" from the high-pressure side of the pump is necessary, which reduces the pump efficiency

Method used

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  • Regulating device for hydrostatic pumps and hydrostatic pumps
  • Regulating device for hydrostatic pumps and hydrostatic pumps
  • Regulating device for hydrostatic pumps and hydrostatic pumps

Examples

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Embodiment Construction

[0039] figure 1 A connection diagram of an adjustable hydrostatic pump 1 with a first exemplary embodiment of an adjusting device according to the invention for a deflectable swash plate 2 of the pump 1 is shown. Said regulating device comprises a power regulator formed by a power regulating valve 4 and a servo piston 6 connected to the swash plate 2 . Furthermore, the regulating device has a pressure-delivery flow regulator 8 placed on the pump housing 7 and a valve arrangement according to the invention embedded in the pump housing 7 . The valve device is based on the figure 1 In the first embodiment and in accordance with figure 2 In the second embodiment of and in the Figure 5 The third embodiment includes differential pressure valves 10, 110, 210.

[0040] The pressure delivery flow regulator 8 is connected to the pump housing 7 via a high-pressure control connection 12 , via a control connection 14 and via a leakage connection 16 . Furthermore, the pressure-delive...

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Abstract

The device has a power adjusting valve (4) provided with three interfaces and a valve slide block. The second interface is connected with an oil tank. The third interface is connected with a servo chamber. A valve device adjusts the valve slide block, and is provided with pressure difference valves (10, 110, 210), where pressure of a pressure interface is reduced. A valve base is located on a shell body and fixed with valve base construction bolts. The valve device is provided with a clapboard that is provided with a throttling bolt, which is rotatably located on the shell body.

Description

technical field [0001] The invention relates to a regulating device which is arranged to regulate the displacement of a hydrostatic pump which can be adjusted and which has a power regulating valve with a first connection, a second connection and The third port and the valve slider, the hydraulic oil can flow into the first port from the pressure port of the pump; the second port can be connected with the oil tank; the third port is connected with the servo chamber at the servo piston place Connection; the valve slide can be acted upon by the control pressure when reducing the displacement of the pump and can be acted upon by the spring device when increasing the swivel angle. Background technique [0002] The hydrostatic pump can, for example, be a regulating pump of axial piston design, wherein the oil supply quantity is adjusted by changing the swivel angle of the swash plate. The basic structure of a control device for an electro-proportional swivel angle control of a c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B49/08
CPCF04B1/2078F04B1/324F04B49/002
Inventor F.诺尔特A.阿佩尔格N.格拉特哈尔
Owner ROBERT BOSCH GMBH
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