Hydrostatic positive-displacement machine

Abstract

The invention provides a hydrostatic positive-displacement machine with a variable displacement volume, which can be operated in a closed circult and conveys liquid medium to the working cycle, and the displacement volume is adjustable by means of an adjusting device, and the rear part comprises an adjustable valve device provided with a control pressure chamber, and the rear part is connected with the displacement volume adjusting mechanism in an operative mechanism, the control pressure chamber of the adjusting valve device is connected to the pressure source by means of the adjusting valve or is unloaded towards the container, and a displacement machine and the pressure source are driven by a driver, and the displacement comprises a rear pivot means, and can ensure the displacment machine is loaded toward the reduction direction of the displacement when the pressure of the pressure source is reduced. When the pressure is reduced, the displacement adjusting mechanism is adjusted towards the direction of the displacement reduction, and the pivot means comprises at least one sequence valve, which is connected to the working cycle of the displacement machine at the input side, when the pressure from the pressreu source is reduced below the boundary pressure, the sequence valve allows supply of the adjusting device of the displacement device with liquid medium from the working cycle.

Description

technical field [0001] The invention relates to a hydrostatic displacement machine, in particular an axial piston machine, with a variable displacement volume, capable of operating in a closed circuit circuit and feeding a hydraulic medium into the working cycle, wherein the displacement volume Can be adjusted by means of an adjusting device comprising an adjusting piston arrangement provided with a first control pressure chamber and a second control pressure chamber, which is operatively connected to a displacement volume adjustment mechanism, in particular a swash plate, wherein , the control pressure chamber of the regulating piston device can be connected to a supply pressure source by means of a regulating valve or can be unloaded towards a container, wherein the displacement machine and the supply pressure source are driven by a drive machine, in particular an internal combustion engine, and The displacement machine has a swing-back device which ensures that the displace...

AI Technical Summary

Problems solved by technology

Such a pivoting device, however, results in high structural complexity due to the high spring force on the adjusting piston arrangement, since the restoring force of the spring must be controlled by the adjusting piston arrangement when the displacement volume adjustment mechanism is tilted during normal operation of the displacement machine. The actuating pressure present in the pressure chamber overcomes the need for a correspondingly high actuating pressure level of the actuating pressure chamber with a correspondingly large size of the actuating piston arrangement

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