Four-chamber cylinder for a hydraulic actuating device with emergency function and hydraulic actuating device employing same

A technology of operating device and chamber, applied in the field of four-chamber cylinder, can solve the problems of technical cost and cost of hydraulic system device

Active Publication Date: 2014-12-31
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The disadvantage of such a hydraulic operating device is that on the one hand the hydraulic system for the position adjustment and on the other hand th

Method used

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  • Four-chamber cylinder for a hydraulic actuating device with emergency function and hydraulic actuating device employing same
  • Four-chamber cylinder for a hydraulic actuating device with emergency function and hydraulic actuating device employing same
  • Four-chamber cylinder for a hydraulic actuating device with emergency function and hydraulic actuating device employing same

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Embodiment Construction

[0093] figure 1 Relevant parts of an exemplary embodiment of the four-chamber cylinder 1 according to the invention are shown in a side sectional view. It has a cylinder tube 2 which is covered on the one hand with a first end-side cover 4 designed as a base plate and on the other hand with a second end-side cover 6 . Arranged on the outer circumference of the cylinder pipe 2 (in figure 1 not shown in ), which is explained with reference to the following figures.

[0094] Inside the four-chamber cylinder 1 is accommodated a first piston 8 which, together with the first cover 4, delimits a first chamber 10, the size of which is between figure 1 is the smallest. Furthermore, inside the four-chamber cylinder 1 is accommodated a second piston 12 which, together with the second cover 6, delimits a fourth chamber 14 and which chamber is in figure 1 The middle adjustment is relatively small.

[0095] A radial constriction 16 or a radial step is arranged in the middle of the cyli...

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Abstract

The invention provides a four-chamber cylinder for a hydraulic actuating device with emergency function and a hydraulic actuating device employing same. The four-chamber cylinder according to the disclosure has two piston devices which in each case have a piston and a piston rod. Each piston limits two counteractive chambers. When one chamber is adjusted and operated to press the piston device to another piston, and accordingly the other chamber extends one of abutting piston rods into the guiding gap of another piston rods in a telescopic way. The emergency spring retains under prestress during adjusting of the four-chamber cylinder, and two pistons extrude towards each other. In this way, a compact four-chamber cylinder is realized. The four-chamber cylinder serves for adjusting a valve, a turbine or a process device with increased safety demands. An actuating movement is possible via the emergency spring even in the case of a supply failure, wherein the four-chamber cylinder can be installed and operated bi-directionally.

Description

technical field [0001] The invention relates to a hydraulic operating device and a four-chamber cylinder suitable therefor, which serves to adjust safety-relevant components and which performs an emergency function in the event of a failure in the supply of the operating device. Background technique [0002] Documents DE 101 52 414 A1 and DE 197 23 624 A1 disclose hydraulic actuating devices for adjusting the hydraulic pressure of a valve body with a fixed mechanical coupling between cylinder and valve body. The valve body is pretensioned in the closing direction of the valve by means of an emergency spring, by means of which the valve can be closed in emergency operation. [0003] A disadvantage of such a hydraulic actuating device is that the emergency spring is released or tensioned by the actuating device during each adjustment movement of the valve body. [0004] Document DE 103 08 017 B4 shows a hydraulic actuating device with a mechanical coupling and an emergency sp...

Claims

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Application Information

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IPC IPC(8): F15B15/14F15B20/00F15B11/036
CPCF15B15/1476F15B15/18F15B20/00F15B2211/20561F15B2211/27F15B2211/30505F15B2211/30565F15B2211/3058F15B2211/7055F15B2211/8752F16K31/1225F15B15/1409F16K17/04
Inventor J.施瓦克
Owner ROBERT BOSCH GMBH
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