Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
SHAFT SEAL STRUCTURE AND SHAFT SEAL METHOD OF ROOTS BLOWER FOR VACUUM EVAPORATOR, AND VACUUM EVAPORATION DEVICE
Document Type and Number:
Japanese Patent JP2011185192
Kind Code:
A
Abstract:

To provide a shaft seal structure and shaft seal method of a roots blower for a vacuum evaporator, and a vacuum evaporation device, preventing grease or lubricating oil of bearings from being contaminated with steam by using oil seals as shaft seals and discharging the steam leaked from the inside of a rotor chamber to the outside to prevent the steam from leaking to a bearing side.

In the shaft seal structure, a pair of cocoon type rotors 24A, 24B and the bearings 26a-26d rotatably supporting opposite ends of respective rotating shaft 25A, 25B of the rotors 24A, 24B, respectively, are contained in a casing, and the oil seals 32a-32d are installed between the rotating shafts and the casing at parts between the respective bearings 26a-26d and the rotor chamber 31, respectively. An air filling hole 33 for communicating with the outside air and introducing the outside air into the casing and a discharge hole 34 for discharging the air introduced in the casing are formed in the casing between each oil seal 32a-32d and the corresponding bearing 26a-26d. The discharge hole 34 is connected to a vacuum pump 12 through a vacuum line 11b.


Inventors:
Matsushita, Tetsuya
Hirano, Satoru
Mukoda, Tamito
Nishimura, Yasushi
Application Number:
JP2010000052617
Publication Date:
September 22, 2011
Filing Date:
March 10, 2010
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
SASAKURA ENGINEERING CO LTD
International Classes:
F04C27/00; B01D1/28; F04C25/02; F16C33/72; F16J15/324
Domestic Patent References:
JP2008188514A2008-08-21
JP2000213488A2000-08-02
Attorney, Agent or Firm:
来代 哲男
田村 正憲