JPH0226785U

JPH0226785U -

Info

Publication number: JPH0226785U
Application number: JP10389088U
Authority: JP
Priority date: 1988-08-05
Filing date: 1988-08-05
Publication date: 1990-02-21

Description

[Brief explanation of the drawing]

第１図は一部を切欠いて示す本考案のヘリカル
ロータの側面図、第２図は第１図の―線に沿
う同ヘリカルロータの断面図、第３図は同ヘリカ
ルロータに用いるロータセグメントの斜視図、第
４図は同ヘリカルロータの加工工程説明図、第５
図は従来の３葉ヘリカル式ルーツポンプの断面図
、第６図は第５図の―線に沿う断面図である
。１……ロータ軸、４……ロータセグメント、４
ａ……中心孔、４ｃ……キー溝、５……マンドレ
ル、５ａ……キー。 Fig. 1 is a partially cutaway side view of the helical rotor of the present invention, Fig. 2 is a sectional view of the helical rotor taken along the line - in Fig. 1, and Fig. 3 is a diagram of the rotor segments used in the helical rotor. A perspective view, Figure 4 is an explanatory diagram of the machining process of the same helical rotor, Figure 5
The figure is a sectional view of a conventional three-lobed helical Roots pump, and FIG. 6 is a sectional view taken along the line - - in FIG. 1...Rotor shaft, 4...Rotor segment, 4
a...Center hole, 4c...Keyway, 5...Mandrel, 5a...Key.

補正昭６３．９．９考案の名称を次のように補正する。考案の名称ルーツポンプのヘリカルロータ実用新案登録請求の範囲、図面の簡単な説明を
次のように補正する。Amendment September 9, 1983 The name of the invention is amended as follows. Name of invention Helical rotor of roots pump The scope of the utility model registration claims and the brief description of the drawings are amended as follows.

【実用新案登録請求の範囲】ケーシング中に、回転方向に等しく離間したコ
ロガリ接触部ごとに一定のねじれ角３０度〜１２
０度をもちかつ互いに反対方向に同期回転される
２個のヘリカルロータを収容するルーツポンプに
おいて、ロータ軸の長さ方向に対して直角な断面
形状を有すると共に表面の対応位置に一体化用透
孔または空洞孔を形成されかつ中心孔に凹凸のキ
ー部を形成したロータセグメントを金属薄板より
打抜き加工し、前記ねじれ角をもつキーまたはキ
ー溝を有したマンドレルに多数の前記ロータセグ
メントを篏めてロータセグメント間を圧縮してロ
ータセグメント間を密着させ、前記透孔または空
洞孔を利用して棒状またはパイプ状金属を圧入し
てロータセグメント全体を一体化し、前記マンド
レルから取外す一体化したロータセグメント組立
をロータ軸に取付けて用いることを特徴とするル
ーツポンプのヘリカルロータ。[Claims for Utility Model Registration] A constant twist angle of 30 degrees to 12 degrees for each rolling contact part equally spaced in the direction of rotation in the casing.
In a Roots pump that accommodates two helical rotors that rotate synchronously in opposite directions and have a 0 degree angle, the roots pump has a cross-sectional shape perpendicular to the longitudinal direction of the rotor axis, and has transparent holes for integration at corresponding positions on the surface. A rotor segment having a hole or a hollow hole and an uneven key portion formed in the center hole is punched out of a thin metal plate, and a large number of the rotor segments are wrapped around a mandrel having a key or keyway with the helix angle. The rotor segments are compressed to bring them into close contact with each other, and a rod-shaped or pipe-shaped metal is press-fitted using the through hole or hollow hole to integrate the entire rotor segment, and the integrated rotor segment is removed from the mandrel. A Roots pump helical rotor characterized in that the assembly is attached to the rotor shaft.

【図面の簡単な説明】第１図は一部を切欠いて示す本考案の第１実施
例によるヘリカルロータの側面図、第２図は第１
図の―線に沿う同ヘリカルロータの断面図、
第３図は同ヘリカルロータに用いるロータセグメ
ントの斜視図、第４図は同ヘリカルロータの加工
工程説明図、第５図は本考案の第２実施例による
ヘリカルロータの第１図と同様の図、第６図は第
５図の―線に沿う断面図、第７図は同ヘリカ
ルロータに用いるロータセグメントの斜視図、第
８図は従来の３葉ヘリカル式ルーツポンプの断面
図、第９図は第８図の―線に沿う断面図であ
る。１……ロータ軸、４……ロータセグメント、４
ａ……中心孔、４ｃ……キー溝、５……マンドレ
ル、５ａ……キー、７……空洞孔、８，８Ａ……
金属、１０，１０Ａ……透孔。[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a partially cutaway side view of a helical rotor according to a first embodiment of the present invention, and FIG.
A cross-sectional view of the same helical rotor along the line - in the figure,
Fig. 3 is a perspective view of a rotor segment used in the helical rotor, Fig. 4 is an explanatory diagram of the processing steps of the helical rotor, and Fig. 5 is a view similar to Fig. 1 of the helical rotor according to the second embodiment of the present invention. , FIG. 6 is a sectional view taken along line - in FIG. 5, FIG. 7 is a perspective view of a rotor segment used in the same helical rotor, FIG. 8 is a sectional view of a conventional three-lobed helical Roots pump, and FIG. 9 8 is a cross-sectional view taken along line - in FIG. 1...Rotor shaft, 4...Rotor segment, 4
a...Center hole, 4c...Keyway, 5...Mandrel, 5a...Key, 7...Cavity hole, 8, 8A...
Metal, 10, 10A...through hole.

Claims

[Scope of utility model registration request]

A constant helix angle of 30 degrees to 12 degrees for each rolling contact part equally spaced in the direction of rotation in the casing.
In a Roots pump that accommodates two helical rotors that have a 0 degree angle and are rotated synchronously in opposite directions, the roots pump has a cross-sectional shape perpendicular to the longitudinal direction of the rotor shaft and has an uneven key part in the center hole. The formed rotor segments are punched out from a thin metal plate,
A large number of the rotor segments are wrapped around a mandrel having a key or keyway with the helix angle, and the rotor segments are compressed to make them come into close contact with each other, and a rod-shaped or pipe-shaped metal is press-fitted using the hollow hole. A helical rotor for a Roots pump, characterized in that the entire rotor segment is integrated by removing the integrated rotor segment assembly from the mandrel, and the integrated rotor segment assembly is attached to a rotor shaft.