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Sealing Element for Sealing a Rotating Shaft

A technology of sealing components and rotating shafts, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of increasing wear, increasing friction loss, shortening, etc., and achieves the goal of reducing friction loss and reducing friction load. Effect

Inactive Publication Date: 2016-06-29
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the event of severe overpressure in the system, the sealing membrane is pressed with its sealing edge against the shaft so strongly that increased frictional losses and increased wear can result
As a result, leakage and shortened service life of the sealing element and its tribologisches System

Method used

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  • Sealing Element for Sealing a Rotating Shaft

Examples

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Embodiment Construction

[0018] The sealing element 10 shown in the drawing is provided for sealing off the pressure side 12 and the suction side 14 on a rotary shaft 16 of a hydraulic pump (not shown in further detail). The sealing element 10 is held stationary on a stator 18 belonging to the hydraulic pump by means of a substantially rectangular support ring 20 in longitudinal section. A first annular membrane 22 is coupled radially inwardly with respect to the shaft 16 at the support ring 20 and a second annular membrane 24 is then further coupled radially inwardly. In this case, a sealing edge 26 is formed radially inwardly on the second annular membrane 24 , which bears against the shaft 16 . In this case, the support ring 20 , the membrane 22 , the membrane 24 and the sealing edge 26 are produced in one piece or in one piece from an elastomer by vulcanization. A reinforcement ring 28 can additionally be added to the support ring 20 by vulcanization for reinforcement of the support ring.

[001...

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PUM

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Abstract

The invention relates to a sealing element for sealing a rotating shaft. A sealing element (10) for sealing a high-pressure side (12) from a low-pressure side (14) at a rotating shaft (16), in particular in a pump, with a supporting ring (20) configured to be arranged on a stator (18) surrounding the shaft (16) and from which a first annular membrane (22) protrudes facing in the direction toward the shaft (16). From the first annular membrane (22), a second annular membrane (24) protrudes facing in the direction toward the shaft. The first annular membrane (22) is formed longer than the second annular membrane (24) as viewed in the axial direction (30) of the shaft, and the second annular membrane (24) is configured with a sealing edge which is to be arranged lying on the shaft (16).

Description

technical field [0001] The invention relates to a sealing element for sealing the pressure side and the suction side at a rotating shaft, in particular at the rotating shaft of a pump, with a support ring which can be arranged on a stator surrounding the shaft A first annular membrane protrudes from the support ring in a direction towards the shaft. Background technique [0002] Especially in pumps, sealing elements for sealing rotating shafts place higher demands on them than conventional shaft seals. The main reason for this is that the overpressure prevailing on the overpressure side can vary drastically with respect to the underpressure on the side opposite the sealing element, and the pressure ratio of overpressure and underpressure can sometimes even be reversed. Furthermore, in the case of negative pressure in the space which is to be sealed against excess pressure, lifting of the sealing membrane from the shaft occurs in conventional shaft sealing elements. As a re...

Claims

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Application Information

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IPC IPC(8): F16J15/3284F16J15/3248
CPCF16J15/3224F16J15/164F16J15/32
Inventor G·波尔K·迈尔P·M·许勒尔M·米罗瓦诺夫
Owner ROBERT BOSCH GMBH
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