Pump or motor

a technology of spur toothing and thrust, which is applied in the direction of machines/engines, rotary/oscillating piston pump components, liquid fuel engines, etc., can solve the problems of major power limitation, excessive effort and expense, and the corresponding high demands of rotary bearings and axial bearings, so as to increase the power range of machines accordingly.

Inactive Publication Date: 2010-04-29
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is about creating a pump or motor for handling liquid or gaseous media. The goal is to create a machine that can handle higher working pressures without being negatively affected, and without requiring significant manufacturing expense.

Problems solved by technology

In both cases, two working parts in the machine housing are moved to rotate, which makes correspondingly high demands of the rotary bearing and the axial bearing and has a major power limitation with reference to the working pressure.
Moreover, the effort and expense for production of such convex or concave flank faces on the teeth of the spur toothing is extraordinarily high.
Aside from this, the flow of the medium via the radial peripheries of the edges controlling the orifices of the conduits causes corresponding wear to the working parts, which with a corresponding increase in the power loss over the service life of the machine likewise increases.
Because of this wear, increasing on the spherical surface of the teeth, a leak from one work chamber to the next occurs in this outer spherical region of the teeth, and the otherwise advantageous slight overlap of the radial face end of the teeth with the diametrically opposed spherical wall has an especially adverse effect.

Method used

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Embodiment Construction

[0033]In FIG. 1, an exemplary embodiment of the invention is shown in longitudinal section and is then also shown in perspective in FIG. 3. This is a machine which depending on its use can be used as a pump or motor for liquid or gaseous media, and as can be seen particularly from FIG. 3, the cross section of the mounting housing 1 is cylindrical, to enable inserting the machine into corresponding bores. Toward the bore wall, not shown, O-rings 2 form the requisite sealing off of the mounting housing 1 from the part receiving the machine, such as a pipeline or also a bore in an apparatus that receives this machine. In this mounting housing 1, a shaft 4 is rotatably supported via a radial bearing 3, and via a leaf spring means 5 and a securing ring 6, the shaft is lightly loaded in the axial direction and is correspondingly displaceable. For sealing purposes, an O-ring 7 is used between the shaft 4 and a housing insert 8; this ring is braced on the mounting housing 1 via an axial bea...

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Abstract

The invention relates to a pump or motor for liquid or gaseous media. The pump or motor has a shaft, which faces a working part, and has a common inclined sliding surface with the working part. The working part which limits the pump working chambers, wobbles in a positionally fixed housing.

Description

PRIOR ART AND ITS DISADVANTAGES[0001]The invention is based on a pump or a motor for liquid or gaseous media as generically defined by the preamble to the main claim. In a known machine of this type (German published patent application DE-OS 42 41 320), the working part is driven via the shaft, and in the manner like a machine with spur toothing, the working parts between the work faces are reduced or increased in size for pumping the medium. Conversely, such a machine can also act as a motor, in that medium is pumped under pressure into the work chambers and by increasing the size of the work chambers generates a drive of the shaft. In both cases, two working parts in the machine housing are moved to rotate, which makes correspondingly high demands of the rotary bearing and the axial bearing and has a major power limitation with reference to the working pressure.[0002]In another known machine of this type (U.S. Pat. No. 3,236,186), the two parts meshing with their teeth with one an...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): F01C1/08F01C3/08F01C19/00F04C15/00F04C3/08F04C2/08
CPCF01C1/084F01C3/085F01C1/00F04C15/068F04C2240/60F01C21/18
InventorARNOLD, FELIXSKRYNSKI, EVGENIJ
OwnerROBERT BOSCH GMBH