Seal device for a fluid machine

a fluid machine and sealing device technology, applied in the direction of machines/engines, stators, liquid fuel engines, etc., can solve the problems of reducing the efficiency of fluid machines, and limiting the reduction of leakage, so as to reduce leakage losses, increase the efficiency of fluid machines, and prevent vibration
US20070280823A1Inactive Publication Date: 2007-12-06TORISHIMA PUMP MFG CO LTD
13 Cites 17 Cited by

Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
TORISHIMA PUMP MFG CO LTD
Publication Date
2007-12-06
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

A seal device 25B has a wear-ring 31 fixed to a casing 2 of a centrifugal pump and a floating ring 32. An annular gap 36 between an inner peripheral surface of a through bore 32a formed in the floating ring 32 and an outer peripheral surface of a mouth ring portion 19 of an impeller 5B is smaller than an annular gap 35 between an inner peripheral surface of a through bore 31a formed in the wear-ring 31 and the outer peripheral surface of the mouth ring portion 19. Fluid leakage from a high pressure area to a low pressure area in the casing 2 through the gaps is prevented.
Need to check novelty before this filing date? Find Prior Art

Description

BACKGROUND OF THE INVENTION

[0001] The present invention relates to a seal device for a fluid machine (turbo machine) such as a pump, turbine, compressor, and gas turbine. Particularly, the present invention relates to a seal device for preventing leakage of a fluid from a high pressure area to a low pressure area in a casing of the fluid machine through a gap between the casing and a rotor disposed in the casing.

[0002] An example of a seal device installed between a casing and a rotor such as a main shaft or an impeller of a fluid machine is disclosed in Japanese Utility Model Application Laid-open Publication No. 6-018694. The seal device uses a wear-ring. Specifically, a gap is formed between an inner peripheral surface of the wear-ring fixed to the casing and an outer peripheral surface of the rotor, and a size of the gap is set to as small as possible, thereby preventing the fluid leakage from a high pressure side to a low pressure side via the gap.

[0003] However, the conventional ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More