Title:
歯車ポンプ
Document Type and Number:
Japanese Patent JP4688864
Kind Code:
B2
Abstract:
A gear pump applicable for feeding a high-pressure and high-viscosity fluid, such as a molten resin is provided. In the gear pump 100, the fluid is fed from a suction port side to a discharge port side by the rotation of gears. The gears are formed in a pair and meshing with each other. The gears are double-helical gears having a one-point continuous contact tooth profile. For the gears, the ratio D/B of the outer diameter D and the tooth width B are set to 1.1 to 1.15. When the ratio D/B is equal to or smaller than 1.1, a bearing may be damaged due to an excessively increased bearing load. On the other hand, when the ratio D/B is larger than 1.15, in accordance with an increase in the overall size of the pump external dimension, the mechanical efficiency is lowered, and the overall efficiency is also lowered.
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Inventors:
Motohiro Okada
Application Number:
JP2007504693A
Publication Date:
May 25, 2011
Filing Date:
February 17, 2006
Export Citation:
Assignee:
Shimadzu Mectem Co., Ltd.
International Classes:
F04C2/18; B29C47/08; D01D1/06; F04C13/00; F04C15/00
Domestic Patent References:
| JPS3114962Y1 | ||||
| JPS5138922B1 | 1976-10-25 | |||
| JPS307809B1 |
Attorney, Agent or Firm:
Tamio Nishiwaki