Turbomachine

A turbine, mechanical technology that is used in mechanical equipment, engine components, machines/engines, etc. to solve problems such as expensive

Inactive Publication Date: 2008-08-06
OERLIKON LEYBOLD VACUUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, roller bearings have the disadvantage that they are relatively expensive and can account for up to 10% of the total cost of turbomolecular pumps and turbo blowers

Method used

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  • Turbomachine

Examples

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Embodiment Construction

[0021] 1 and 2 illustrate a rapidly rotating turbine 10 designed as a turbomolecular pump and comprising a rotor 12 and a stator 14 . The rotor 12 basically comprises a shaft 16 with a pump rotor 18 , the shaft section in the bearing region of which forms a bearing shaft 20 . The bearing shaft 20 forms the rotor-side part of the two magnetic bearings 22, 23 and the rotor-side part of the sliding bearing 26, 27, which is arranged axially between the two magnetic bearings 22, 23 and serves as two Safety bearings for magnetic bearings 22,23.

[0022] Each slide bearing 26 , 27 is formed by a bearing shaft 20 , a stator-side bearing shell 28 and a cylindrical intermediate bushing 30 arranged radially between the bearing shell 28 and the bearing shaft 20 . The bearing housing 28, the intermediate bushing 30 and the bearing shaft 20 are made of metal. The intermediate bushing 30 is supported by a metallic spring element 32 in fixed relation to the bearing housing 28 .

[0023] T...

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PUM

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Abstract

The invention relates to a high-speed turbine comprising a magnetic bearing (22, 23) for supporting a rotor and a safety bearing. The safety bearing is configured as a plain bearing (26, 27) and comprises a bearing housing (28) on the stator side, a bearing shaft (20) on the rotor side and a bearing housing (28) and bearing shaft (20) Intermediate bushing (30). The intermediate bushing (30) is separated from the bearing shaft (20) and the bearing shell (28) by annular gaps (33, 34). The intermediate bushing (30) is rotatable relative to the bearing housing (28) and the bearing shaft (20). Due to this design, the sliding bearing (26) provides two pairs of sliding surfaces on which all generated dynamic forces are distributed to significantly reduce wear, thus allowing the use of sliding bearings in magnetically supported high-speed turbines as Safe bearings.

Description

technical field [0001] The invention relates to a turbomachine comprising a magnetic bearing and a safety bearing associated with the magnetic bearing. Background technique [0002] Turbopumps such as turbomolecular pumps and turboblowers rotate at very high speeds, for example up to 80,000 revolutions per minute. Therefore, the rotor is preferably supported in magnetic bearings, which are especially suitable for high speeds. If the magnetic bearing fails, so-called mechanical safety bearings are provided to prevent the pump rotor from touching the pump stator and thus damaging the pump stator. [0003] Roller bearings are used as safety bearings for turbomolecular pumps, which are subject to lower wear than plain bearings due to their structural principles. However, roller bearings have the disadvantage that they are relatively expensive and can account for up to 10% of the total cost of a turbo molecular pump and turbo blower. Contents of the invention [0004] In con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C39/04F01D25/16F04D19/04
CPCF01D25/16F04D19/048F16C17/18F16C27/02F16C32/0442F16C39/02F05D2240/51F05D2240/52F16C2360/45F16C33/46F16C39/04F04D19/04F16C33/04
Inventor 罗兰·布卢门塔尔
Owner OERLIKON LEYBOLD VACUUM
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