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Scroll pump with load bearing synchronization device

A technology of synchronous devices and scrolls, which is applied to components of pumping devices for elastic fluids, rotary piston type/oscillating piston type pump components, pumps, etc., can solve the problem of not being able to rigidly support axial loads, lateral Problems such as high bending stress and failure to provide performance

Inactive Publication Date: 2007-03-21
AGILENT TECH INC
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The applicants of the present application have found that the endless belts disclosed in the Blain patent do not provide satisfactory performance in certain applications.
For example, that endless belt cannot rigidly support the axial loads associated with the operation of that scroll arrangement
The lateral bending stresses in the annulus are also high and may limit the life of that synchronizer

Method used

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  • Scroll pump with load bearing synchronization device
  • Scroll pump with load bearing synchronization device
  • Scroll pump with load bearing synchronization device

Examples

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Embodiment Construction

[0029] A scroll pump according to a first embodiment of the present invention is shown in FIGS. 1 and 2 . Gas, typically air, is drawn from a vacuum chamber or other device (not shown) connected to an inlet 12 of the pump. Pump casing 14 includes a fixed scroll plate 16 and a frame 18 . This pump also includes an outlet 12 for discharging the gas pumped by it.

[0030] The scroll pump consists of a pair of interengaging helical scroll vanes. The scroll blade pair includes a fixed scroll blade 30 extending from the fixed scroll plate 16 and an orbiting scroll blade 32 extending from an orbiting scroll plate 34 . The scroll vanes 30 and 32 are preferably integrally formed with the scroll plates 16 and 34, respectively, to facilitate heat transfer and increase the mechanical rigidity and durability of the pump. The scroll blade 30 and the scroll plate 16 form a fixed scroll member 44 and the scroll blade 32 and the scroll plate 34 form an orbiting scroll member 46 . The respe...

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Abstract

A scroll pumping device, it includes: a first scroll part (44) and a second scroll part (46); a driving mechanism, it is operatively connected to the second scroll part to make the second the scroll member (46) orbits relative to the first scroll member (44); and a synchronizing device (140) comprising a belt having a plurality of connected generally flat belt segments, the A strap segment is coupled between the first scroll part and the second scroll part. The synchronization device may have a generally square configuration.

Description

technical field [0001] This invention relates to scroll pumps and, more particularly, to an apparatus and method for synchronizing an orbiting scroll element with a stationary scroll element in a scroll pump. Background technique [0002] Scroll arrangements are well known in the field of vacuum pumps and compressors. In a scroll device, a moving helical blade orbits relative to a fixed helical blade within a housing. The moving screw blades are connected to an eccentric drive mechanism. The structural arrangement of these scroll vanes and their relative motion create one or more enclosed gas volumes or "pockets" between them and move gas through the device. Most applications apply rotary power to pump gas with this device. Other applications include various expanders as opposed to compressors and various vacuum pumps. To date, scroll pumps have not been widely used as vacuum pumps, mainly because scroll pumps are much more expensive to manufacture than oil-lubricated va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C18/02F04C29/00
CPCF04C18/0215F04C29/0057
Inventor A·G·莱帕特S·E·普拉斯泰德
Owner AGILENT TECH INC
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