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Internal gear machine with hydrostatically supported inner sealing part on filler piece

A technology of seals and gears, which is applied to rotary piston type/swing piston type pump components, liquid fuel engines, pump components, etc., can solve problems such as low cost and so on.

Pending Publication Date: 2021-05-11
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Internal gear machines are also particularly cost-effective

Method used

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  • Internal gear machine with hydrostatically supported inner sealing part on filler piece
  • Internal gear machine with hydrostatically supported inner sealing part on filler piece
  • Internal gear machine with hydrostatically supported inner sealing part on filler piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] figure 1 A perspective view of the internal gear machine 10 according to the invention is shown. The internal gear machine 10 comprises a housing 20 which in the present case consists of a first, second and third housing part 21 ; 22 ; 23 . The housing parts 21 ; 22 ; 23 are each formed as a plate, wherein they are arranged next to each other in the sequence described and are firmly connected to one another. They rest in pairs on planar surfaces oriented perpendicular to the axis of rotation 11 . High-pressure and low-pressure connections 24 ; 25 are provided on the second housing part 22 . The current internal gear machine 10 is designed for operation as a pump, so that the low-pressure connection 25 has a larger cross-section than the high-pressure connection 24 .

[0025] The drive shaft 12 protrudes with a drive journal from the housing 20 , in particular from the first housing part 21 , so that the drive shaft can be in a rotational drive connection with an elec...

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PUM

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Abstract

The invention relates to an internal gear machine with an externally toothed pinion and an internally toothed ring gear which mesh with each other, wherein a spacer is arranged between the pinion and the ring gear, and comprises an outer sealing part, a separate inner sealing part and a first pressure chamber; wherein first and second sealing surfaces are provided, each of which is flat and arranged perpendicular to the axis of rotation; wherein the pinion, the ring gear and the inner and the outer sealing part are received between the first and second sealing surfaces. According to the invention, a hydrostatic first pressure field is arranged between the first sealing surface and the corresponding counter-sealing surface on the inner sealing part, which via a first fluid channel is fluidically connected to a high-pressure connector.

Description

technical field [0001] The invention relates to an internal gear machine according to the preamble of claim 1 . Background technique [0002] An internal gear machine is known from DE 10 2005 041 579 B4. The internal gear machine has an externally toothed pinion which meshes with an internally toothed ring gear. The high-pressure area and the low-pressure area are fluid-tightly separated from each other by a multi-part gasket. The outer seal of the gasket bears sealingly against the tooth head of the ring gear. The inner seal of the washer rests sealingly against the tooth head of the pinion. The first pressure chamber is located between the inner and outer seals, wherein the pressure there supports the described sealing engagement. The ring gear, the pinion and the spacer are accommodated between a first flat sealing surface and a second flat sealing surface, which are each arranged perpendicularly to the axis of rotation of the pinion. [0003] The previously explaine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C2/10F04C15/00F03C2/22
CPCF04C2/101F04C15/0019F03C2/22F04C15/0026
Inventor E·罗特H·弗里德里希M·格茨V·科伊内
Owner ROBERT BOSCH GMBH
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