JPS6192786U - - Google Patents
Info
- Publication number
- JPS6192786U JPS6192786U JP17672184U JP17672184U JPS6192786U JP S6192786 U JPS6192786 U JP S6192786U JP 17672184 U JP17672184 U JP 17672184U JP 17672184 U JP17672184 U JP 17672184U JP S6192786 U JPS6192786 U JP S6192786U
- Authority
- JP
- Japan
- Prior art keywords
- casing
- reduction device
- load reduction
- pressure
- working chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
Description
第1図は、本考案を実施した例として示したオ
イルフリースクリユー真空ポンプの正面断面図、
第2図は第1図のA−A断面拡大図、第3図、第
4図は、それぞれ他の実施例の断面図と弁装置部
の断面図である。
1…メインケーシング、2…吐出ケーシング、
4…雌ロータ、5…雄ロータ、13…本弁体、1
4b…補助吐出通路。
FIG. 1 is a front sectional view of an oil-free screw vacuum pump shown as an example of implementing the present invention;
FIG. 2 is an enlarged cross-sectional view taken along the line AA in FIG. 1, and FIGS. 3 and 4 are cross-sectional views of another embodiment and a valve device section, respectively. 1... Main casing, 2... Discharge casing,
4... Female rotor, 5... Male rotor, 13... Main valve body, 1
4b...Auxiliary discharge passage.
Claims (1)
び雌ロータが、その軸を平行にして互いに噛み合
いながら回転可能な状態でケーシング内に納めら
れ、上記両ロータとケーシングにより作動室を形
成し、該作動室に閉じ込められた吸入ガスを該ロ
ータの回転に伴つて吐出口から吐出するスクリユ
ー真空ポンプの圧縮路程で、作動室内圧力が設定
圧力より高い圧力に上昇した際に作動室内圧力を
低下させ、軸トルクの増大を防ぐ機能を持つ負荷
軽減装置において、該負荷軽減装置の弁に、ケー
シング内壁と同一形状を持ち、弁を閉じた状態で
は、ケーシング内壁の一部を形成する弁体を用い
たことを特徴とするオイルフリースクリユー真空
ポンプの負荷軽減装置。 A pair of male and female rotors having spiral land portions and groove portions are housed in a casing in a rotatable state with their axes parallel and meshing with each other, and the two rotors and the casing form an operating chamber. In the compression path of the screw vacuum pump, which discharges the suction gas trapped in the working chamber from the discharge port as the rotor rotates, the pressure in the working chamber is reduced when the pressure in the working chamber rises to a higher pressure than the set pressure. In a load reduction device that has a function of preventing an increase in shaft torque by increasing the load reduction device, the valve of the load reduction device has a valve body that has the same shape as the inner wall of the casing and forms a part of the inner wall of the casing when the valve is closed. A load reduction device for an oil-free screw vacuum pump.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17672184U JPS6192786U (en) | 1984-11-22 | 1984-11-22 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17672184U JPS6192786U (en) | 1984-11-22 | 1984-11-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6192786U true JPS6192786U (en) | 1986-06-16 |
Family
ID=30734314
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17672184U Pending JPS6192786U (en) | 1984-11-22 | 1984-11-22 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6192786U (en) |
-
1984
- 1984-11-22 JP JP17672184U patent/JPS6192786U/ja active Pending
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