JPH10238483A - Screw rotary machine - Google Patents
Screw rotary machineInfo
- Publication number
- JPH10238483A JPH10238483A JP5257197A JP5257197A JPH10238483A JP H10238483 A JPH10238483 A JP H10238483A JP 5257197 A JP5257197 A JP 5257197A JP 5257197 A JP5257197 A JP 5257197A JP H10238483 A JPH10238483 A JP H10238483A
- Authority
- JP
- Japan
- Prior art keywords
- tooth profile
- curve
- pitch circle
- rotor
- profile curve
- 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
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、可圧縮性の流体
を動力をかけて圧縮したり、または圧縮した流体を膨張
せしめて動力を取り出したり、圧縮した流体や膨張した
流体を移送したりする、スクリユ回転機械に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to compressing a compressible fluid by applying power, or extracting power by expanding a compressed fluid, or transferring compressed or expanded fluid. , Related to screw drill rotating machine.
【0002】[0002]
【発明が解決しようとする課題】スクリユ回転機械は、
平行な二軸の周りを相互に接触しながら回転する雌ロー
タおよび雄ロータよりなる二個のスクリユ・ロータを回
転可能にケーシングに収納し、両ロータとケーシングと
によって形成する作用空間を可圧縮流体の圧縮または膨
張に利用するものであって、互いに噛み合う雌ロータと
雄ロータのスクリユ歯形の回転軸に垂直な面内の断面形
状によって、円弧歯形のスクリユ回転機械と非対称歯形
のスクリユ回転機械とに分類される。スクリユ回転機械
は、平行な二軸の回りを相互に接触しながら回転する二
個のスクリユ・ロータであって、その一方がその回転軸
に垂直な面におけるピッチ円の円弧をm等分したピッチ
円上の点を中心として、略円弧状に描いたm個の歯形を
ピッチ円内に形成した雌ロータ、他方がその回転軸に垂
直な面におけるピッチ円の円弧をn等分したピッチ円上
の点を中心として、略円弧状に描いたn個の歯形をピッ
チ円外に形成した雄ロータである、雌雄のロータを有す
るものである。The screw rotating machine is
Two screw rotors including a female rotor and a male rotor that rotate while being in contact with each other about two parallel axes are rotatably housed in a casing, and the working space formed by both rotors and the casing is compressed fluid. , Which is used for the compression or expansion of the female rotor and the male rotor meshing with each other, depending on the cross-sectional shape in a plane perpendicular to the rotation axis of the screw tooth profile of the female rotor and the male rotor. being classified. A screw rotating machine is two screw rotors that rotate while contacting each other around two parallel axes, one of which is a pitch obtained by equally dividing the arc of a pitch circle in a plane perpendicular to the rotation axis by m. A female rotor in which m teeth formed in a substantially arc shape are formed in a pitch circle around a point on the circle, and the other is a pitch circle obtained by equally dividing the arc of the pitch circle in a plane perpendicular to the rotation axis by n. And male and female rotors, each of which is a male rotor in which n teeth formed in a substantially arc shape are formed outside the pitch circle around the point (1).
【0003】そして円弧歯形のスクリユ回転機械は、雌
ロータの歯形と雄ロータの歯形を噛み合わせたとき、雌
ロータの1個の歯の歯形曲線は、両ロータのピッチ円の
接触点を中心として半径rの円弧で雌ロータのピッチ円
内に描かれたものとし、雄ロータの1個の歯の歯形曲線
は、雌ロータの歯形と同一の歯形曲線を中央部に有する
とともに、雄ロータの歯形の回転方向後側の追従側歯形
曲線および雄ロータの歯形の回転方向前側の前進側歯形
曲線を、雄ロータのピッチ円に至るまで当該雄ロータに
接触する雌ロータの歯形のピッチ円上の点が創成する曲
線として、中央部の円弧歯形に接続せしめて雄ロータの
ピッチ円外に描いたものである。円弧歯形のスクリユ回
転機械は、雌ロータの歯形曲線と雄ロータの中心部の歯
形曲線とが同一半径の円弧の歯形曲線であるため、雌ロ
ータの歯形曲線上では雄ロータの歯形曲線が直ちに離間
し、そのため雌雄両ロータが噛み合うのは一瞬で、雌雄
両ロータが噛み合っていくときに出来る吹き抜け孔が大
きく、噛み合い間隙の高圧流体が大きなブローホールか
ら低圧側に向けて吹き抜けることとなり、性能低下を招
くという欠点がある。[0003] In the screw rotating machine of the arc-tooth shape, when the tooth shape of the female rotor is meshed with the tooth shape of the male rotor, the tooth profile curve of one tooth of the female rotor is centered on the contact point of the pitch circle of both rotors. The tooth profile curve of one tooth of the male rotor has the same tooth profile curve as that of the female rotor at the center, and is drawn in the pitch circle of the female rotor with an arc of radius r. The following tooth profile curve on the rear side in the rotation direction and the tooth profile curve on the front side in the rotation direction of the male rotor tooth profile are converted to points on the pitch circle of the female rotor tooth profile that contacts the male rotor up to the male rotor pitch circle. Are drawn outside the pitch circle of the male rotor by being connected to the central arcuate tooth profile. In the arcuate screw type rotary machine, since the tooth curve of the female rotor and the tooth curve of the center part of the male rotor are arc tooth curves of the same radius, the tooth curve of the male rotor is immediately separated from the tooth curve of the female rotor. Therefore, the rotors of both sexes are instantaneously engaged with each other, and a large blow-through hole is formed when the rotors of both sexes are engaged with each other. There is a disadvantage of inviting.
【0004】[0004]
【発明が解決しようとする課題】これに対して非対称歯
形のスクリユ回転機械は、雌ロータの歯形の回転方向後
側の追従側歯形曲線の主要部を、雌ロータの該主要部に
接触する雄ロータの歯形の回転方向後側の追従側歯形曲
線と回転方向前側の前進側歯形曲線の境界にあたる追従
側歯形曲線上の点または曲線によって創成する曲線と
し、雄ロータの回転方向後側の追従側曲線の主要部を、
雄ロータの該主要部に接触する雌ロータの歯形の回転方
向後側の追従側歯形曲線のピッチ円上の点または該点に
近接してピッチ円内の歯形を構成する曲線によって創成
する曲線とするものである。On the other hand, a screw rotating machine having an asymmetrical tooth profile has a male part that contacts the main part of the female rotor with the main part of the following tooth profile curve on the rear side in the rotation direction of the tooth profile of the female rotor. A curve created by a point or curve on the following tooth profile curve that is the boundary between the following tooth profile curve on the rear side in the rotation direction and the forward profile tooth curve on the front side in the rotation direction of the rotor tooth profile, and the trailing side on the rear side in the rotation direction of the male rotor. The main part of the curve
A curve formed by a point on the pitch circle of the follow-up tooth profile curve on the rear side in the rotation direction of the tooth profile of the female rotor contacting the main part of the male rotor or a curve forming a tooth profile in the pitch circle in close proximity to the point; Is what you do.
【0005】非対称歯形のスクリユ回転機械は、駆動側
の雄ロータの歯形の回転方向後側の追従側歯形曲線と回
転方向前側の前進側歯形曲線の境界にあたる回転方向後
側の追従側歯形曲線上の点または曲線の一部が、先ず雌
ロータの歯形の回転方向後側の追従側歯形曲線の主要部
に接触し、シリンダの吸入側作用空間と吐出側作用空間
とを区劃して、そのシールを保っている間に、雄ロータ
の回転方向後側の追従側歯形曲線の主要部が、雄ロータ
の該主要部に接触する雌ロータの歯形の回転方向後側の
追従側歯形曲線のピッチ円上の点、または該点に近接し
てピッチ円内の歯形を構成する曲線によって創成する曲
線と接触して、シリンダの吸入側作用空間と吐出側作用
区運とを区劃してそのシールを保つから、雄ロータの歯
形の追従側歯形曲線と雌ロータの歯形の追従側歯形曲線
とシリンダの吸入側端面とによって囲まれたバキユーム
空間を形成し、このバキユーム空間は雄雌両ロータの回
転に伴い容積を拡大するので、流体を吸入することなく
徒に開閉を繰り返すから、このバキユーム空間を造成す
るに要する動力は圧縮動作と無関係なため、動力損失を
伴うこととなる。The screw rotating machine having an asymmetrical tooth profile is based on a trailing tooth profile curve on the rear side in the rotational direction which is a boundary between a trailing profile tooth curve on the rear side in the rotational direction and a forward profile tooth curve on the front side in the rotational direction of the tooth profile of the male rotor on the driving side. Point or part of the curve first contacts the main part of the following tooth profile curve on the rear side in the rotational direction of the tooth profile of the female rotor, and separates the suction-side working space and the discharge-side working space of the cylinder. While maintaining the seal, the main part of the trailing profile of the male rotor in the rotational direction is the pitch of the trailing profile of the female rotor in the rotational direction of the tooth profile of the female rotor in contact with the main part of the male rotor. A seal formed by contacting a curve formed by a point on a circle or a curve forming a tooth profile in a pitch circle in the vicinity of the point to separate a suction-side working space and a discharge-side working space of a cylinder from the seal. The tooth profile of the male rotor following the tooth profile And a follower profile of the tooth profile of the female rotor and a suction side end surface of the cylinder to form a vacuum space, and the vacuum space increases in volume with rotation of the male and female rotors. Since the opening and closing are repeated without delay, the power required to create this vacuum space is irrelevant to the compression operation, so that a power loss is involved.
【0006】[0006]
【課題を解決するための手段】本発明は、平行な二軸の
回りを相互に接触しながら回転する二個のスクリユ・ロ
ータであって、その一方がその回転軸に垂直な面におけ
るピッチ円の円弧をm等分したピッチ円上の点を中心と
して、略円弧状に描いたm個の歯形をピッチ円内に形成
した雌ロータ、他方がその回転軸に垂直な面におけるピ
ッチ円の円弧をn等分したピッチ円上の点を中心とし
て、略円弧状に描いたn個の歯形をピッチ円外に形成し
た雄ロータである、雌雄のロータを有するとともに、雌
ロータの歯形の回転方向後側の追従側歯形曲線の主要部
を、雌ロータの該主要部に接触する雄ロータの歯形の回
転方向後側の追従側歯形曲線と回転方向前側の前進側歯
形曲線の境界にあたる追従側歯形曲線上の点または曲線
によって創成する曲線とし、雄ロータの回転方向後側の
追従側歯形曲線の主要部を、雄ロータの該主要部に接触
する雌ロータの歯形の回転方向後側の追従側歯形曲線の
ピッチ円上の点または該点に近接してピッチ円内の歯形
を構成する曲線によって創成する曲線とした非対称歯形
のスクリュ回転機械において、雄ロータの追従側歯形曲
線と、雌ロータの追従側歯形曲線と、シリンダの吸入側
端面とによって囲まれたバキユーム空間を、シリンダの
吸入側端面に形成した窪みを介して吸入側作用空間に連
通せしめたものである。SUMMARY OF THE INVENTION The present invention provides two screw rotors which rotate about two parallel axes while contacting each other, one of which is a pitch circle in a plane perpendicular to the axis of rotation. A female rotor in which m teeth are formed in a pitch circle in a substantially arc shape with a center on a point on the pitch circle obtained by dividing the arc of the circle by m, and the other is the arc of the pitch circle in a plane perpendicular to its rotation axis. Is a male rotor in which n teeth formed in a substantially arc shape are formed outside the pitch circle around a point on the pitch circle obtained by equally dividing n, and the rotation direction of the tooth profile of the female rotor The main part of the trailing profile tooth on the rear side is the following tooth profile that is the boundary between the trailing profile curve on the rear side in the rotational direction of the tooth profile of the male rotor that contacts the main part of the female rotor and the forward profile tooth curve on the front side in the rotational direction. A song created by a point on a curve or a curve The main part of the following tooth profile curve on the rear side in the rotation direction of the male rotor is defined as the point on the pitch circle of the following tooth profile curve on the rear side in the rotation direction of the tooth profile of the female rotor in contact with the main part of the male rotor or In a screw rotating machine having an asymmetrical tooth profile formed by a curve that forms a tooth profile in a pitch circle in close proximity to a point, a following tooth profile curve of a male rotor, a following tooth profile curve of a female rotor, and a suction side of a cylinder. The vacuum space surrounded by the end surface is communicated with the suction-side working space via a recess formed in the suction-side end surface of the cylinder.
【0007】また本発明は、平行な二軸の回りを相互に
接触しながら回転する二個のスクリユ・ロータであっ
て、その一方がその回転軸に垂直な面におけるピッチ円
の円弧をm等分したピッチ円上の点を中心として、略円
弧状に描いたm個の大型の歯形をピッチ円内に形成し、
ピッチ円内の各円弧状歯形の間には小型のアデンダムを
ピッチ円外に形成した雌ロータ、他方がその回転軸に垂
直な面におけるピッチ円の円弧をn等分したピッチ円上
の点を中心として、略円弧状に描いたn個の大型の歯形
をピッチ円外に形成し、ピッチ円外の各円弧状歯形の間
には小型のデデンダムをピッチ円内に形成した雄ロータ
である、雌雄のロータを有するとともに、雌ロータの歯
形の回転方向後側の追従側歯形曲線の主要部を、雌ロー
タの該主要部に接触する雄ロータの歯形の回転方向後側
の追従側歯形曲線と回転方向前側の前進側歯形曲線の境
界にあたる追従側歯形曲線上の点または曲線によって創
成する曲線とし、雄ロータの回転方向後側の追従側歯形
曲線の主要部を、雄ロータの該主要部に接触する雌ロー
タの歯形の回転方向後側の追従側歯形曲線のピッチ円上
の点または該点に近接してピッチ円内の歯形を構成する
曲線によって創成する曲線とした非対称歯形のスクリユ
回転機械において、雄ロータの追従側歯形曲線と、雌ロ
ータの追従側歯形曲線と、シリンダの吸入側端面とによ
って囲まれたバキユーム空間を、シリンダの吸入側端面
に形成した窪みを介して吸入側作用空間に連通せしめた
ものである。The present invention is also directed to two screw rotors which rotate around two parallel axes while contacting each other, and one of the screw rotors defines an arc of a pitch circle on a plane perpendicular to the rotation axis as m or the like. Forming m large tooth shapes drawn in a substantially arc shape in the pitch circle around the point on the divided pitch circle,
A female rotor in which a small addendum is formed outside the pitch circle between the arc-shaped tooth profiles in the pitch circle, and the other is a point on the pitch circle obtained by equally dividing the arc of the pitch circle in a plane perpendicular to the rotation axis by n. As a center, it is a male rotor in which n large tooth shapes drawn in a substantially arc shape are formed outside the pitch circle, and a small denden dam is formed in the pitch circle between each arc shape tooth outside the pitch circle. With male and female rotors, the main part of the trailing-side tooth profile curve in the rotational direction rear of the female rotor tooth profile is the same as the rotational direction trailing trailing tooth profile curve of the male rotor tooth profile in contact with the main part of the female rotor. A curve or a curve created by a point or a curve on the following tooth profile curve that corresponds to the boundary of the forward tooth profile curve on the front side in the rotation direction, and the main part of the following tooth profile curve on the rear side in the rotation direction of the male rotor is used as the main part of the male rotor. How to rotate the tooth profile of the contacting female rotor In a screw-rotating machine with an asymmetrical tooth profile, which is a curve created by a point on the pitch circle of the trailing tooth profile curve on the rear side or a curve forming a tooth profile in the pitch circle in the vicinity of the point, the trailing tooth profile curve of the male rotor And a vacuum space surrounded by the follower-side tooth profile curve of the female rotor and the suction-side end face of the cylinder, which communicates with the suction-side working space via a recess formed in the suction-side end face of the cylinder.
【0008】[0008]
【実施例】図1は、本発明の一実施例の回転軸3、4に
垂直な断面図、図2は一対の雄雌両ロータ1、2の回転
軸3、4に平行な断面図、図3は図1のA−A線に沿う
断面図をそれぞれ示すものである。スクリユ回転機械
は、平行な二軸3、4の回りを相互に接触しながら回転
する二個のスクリユ・ロータであって、雄ロータ1と雌
ロータ2とからなる。雌ロータ2は、その回転軸4に垂
直な面におけるピッチ円6の円弧をm等分したピッチ円
6上の点61を中心として半径rの円弧を円弧状に描い
たm個の歯形62をピッチ円6内に形成し、雌ロータ2
の歯形62と歯形62の間は、ピッチ円6の円弧と一致
する歯先部63に形成する。雄ロータ1は、その回転軸
3に垂直な面におけるピッチ円5の円弧をn等分したピ
ッチ円5上の点51を中心として半径rの円弧状に描い
たn個の歯形52をピッチ円5外に形成し、雄ロータ1
の歯形52と歯形52との間は、ピッチ円5の円弧と一
致する歯元部53に形成する。雄ロータ1と雌ロータ2
とは、両ロータ1、2の回転軸3、4を平行とし、両ロ
ータ1、2の歯形52、62を相互に接触状態に噛み合
わせて、直径がそれぞれのロータ1、2の外径に等しい
二つの円筒空間で、その軸心間の距離を二軸3、4間の
距離に等しく、且つ軸方向の長さが両ロータ1、2の軸
方向の長さと同一としたシリンダを有するケーシング9
に納めて、両ロータ1、2の両端部を吸入側端板7およ
び吐出側端板8で閉塞することにより、スクリユ回転機
械を構成する。FIG. 1 is a cross-sectional view of one embodiment of the present invention, which is perpendicular to the rotating shafts 3, 4. FIG. 2 is a cross-sectional view of a pair of male and female rotors 1, 2 parallel to the rotating shafts 3, 4. FIG. 3 is a sectional view taken along line AA of FIG. The screw rotating machine comprises two screw rotors rotating around two parallel axes 3 and 4 while contacting each other, and includes a male rotor 1 and a female rotor 2. The female rotor 2 has m tooth profiles 62 in which an arc having a radius r is drawn in an arc around a point 61 on the pitch circle 6 obtained by equally dividing the arc of the pitch circle 6 in a plane perpendicular to the rotation axis 4 into m. The female rotor 2 formed in the pitch circle 6
Are formed in a tooth tip portion 63 corresponding to the arc of the pitch circle 6. The male rotor 1 has n tooth profiles 52 drawn in an arc shape with a radius r around a point 51 on the pitch circle 5 obtained by equally dividing the arc of the pitch circle 5 in a plane perpendicular to the rotation axis 3 into n. 5 outside, male rotor 1
Are formed in a tooth root portion 53 that coincides with the arc of the pitch circle 5. Male rotor 1 and female rotor 2
Means that the rotating shafts 3 and 4 of both rotors 1 and 2 are parallel, and the tooth profiles 52 and 62 of both rotors 1 and 2 are engaged with each other in a state of contact with each other so that the diameter is equal to the outer diameter of each rotor 1 A casing having a cylinder having two equal cylindrical spaces, the distance between the axes thereof is equal to the distance between the two shafts 3 and 4, and the axial length is the same as the axial length of both rotors 1 and 2. 9
And the rotors 1 and 2 are closed at both ends by a suction-side end plate 7 and a discharge-side end plate 8, thereby forming a screw rotating machine.
【0009】スクリユ回転機械を圧縮機として作動させ
るときは、雄ロータ1を矢印方向に回転駆動する。雌ロ
ータ2は雄ロータ1に噛合し従動する。このとき、雄ロ
ータ1の歯形52および雌ロータ2の歯形62のそれぞ
れ回転方向後側の歯形曲線を追従側歯形曲線54、64
と称し、それぞれ回転方向前側の歯形曲線を前進側歯形
曲線55、65と称する。雌ロータ2の回転方向後側の
追従側歯形曲線64とピッチ円6の交点を点21、雄ロ
ータ1の回転方向後側の追従側歯形曲線54とピッチ円
5の交点を点11とすれば、雌ロータ2の歯形62の回
転方向後側の追従側歯形曲線64の主要部66(符号2
1、23の間の線)を、雌ロータ2の歯形62の該主要
部66(線21−23)と接触する雄ロータ1の歯形5
2の回転方向後側の追従側歯形曲線54と回転方向前側
の前進側歯形曲線55の境界にあたる点13(追従側歯
形曲線54の終端)によって創成する曲線とし、雄ロー
タ1の回転方向後側の追従側歯形曲線54の主要部56
(符号11、12間の線)は、雄ロータ1の該主要部5
6(線11−12)に接触する雌ロータ2の歯形62の
ピッチ円6上の点21によって創成する曲線としたもの
である。なお図中、雄雌両ロータ1、2の歯形52、6
2の回転方向前側の前進側歯形曲線55、65とピッチ
円5、6との交点をそれぞれ符号59、69とし、雄ロ
ータの前進側歯形曲線55とピッチ円6との交点を符号
58としたとき、雌ロータ2の歯形62の曲線部(23
−69)はピッチ円6の円弧をm等分したピッチ円6上
の点61を中心とする半径rの円弧で、雄ロータ1の歯
形52の曲線部(13−59)はピッチ円5の円弧をn
等分したピッチ円5上の点51を中心とする半径rの円
弧で、曲線部(58−59)雌ロータ2の歯形62の回
転方向前側の前進側歯形曲線65とピッチ円6との交点
69の創成曲線である。When the screw rotating machine is operated as a compressor, the male rotor 1 is driven to rotate in the direction of the arrow. The female rotor 2 is engaged with and driven by the male rotor 1. At this time, the tooth profiles on the rear side in the rotation direction of the tooth profile 52 of the male rotor 1 and the tooth profile 62 of the female rotor 2 are respectively replaced with the following tooth profile curves 54 and 64.
, And the tooth profile curves on the front side in the rotation direction are referred to as forward tooth profile curves 55 and 65, respectively. The point of intersection of the trailing tooth profile curve 64 on the rear side in the rotation direction of the female rotor 2 and the pitch circle 6 is point 21, and the point of intersection of the trailing tooth profile curve 54 on the rear side in the rotation direction of the male rotor 1 and the pitch circle 5 is point 11. The main part 66 (reference numeral 2) of the following-side tooth profile curve 64 on the rear side in the rotation direction of the tooth profile 62 of the female rotor 2
1, 23) to the tooth profile 5 of the male rotor 1 in contact with the main part 66 of the tooth profile 62 of the female rotor 2 (lines 21-23).
2 is a curve created by a point 13 (the end of the following-side tooth profile curve 54) which is a boundary between the following-side tooth profile curve 54 on the rear side in the rotation direction and the forward-side tooth profile curve 55 on the front side in the rotation direction. Main part 56 of the following tooth profile curve 54
(Line between reference numerals 11 and 12) indicates the main part 5 of the male rotor 1.
6 (line 11-12) is a curve created by the point 21 on the pitch circle 6 of the tooth profile 62 of the female rotor 2 that contacts the female rotor 2. In the figure, the tooth profiles 52, 6 of the male and female rotors 1, 2 are shown.
The intersections between the forward-side tooth profile curves 55, 65 on the front side in the rotation direction 2 and the pitch circles 5, 6 are denoted by reference numerals 59, 69, respectively, and the intersection between the forward-side tooth profile curve 55 of the male rotor and the pitch circle 6 is denoted by reference numeral 58. At this time, the curved portion (23
-69) is an arc having a radius r centered on a point 61 on the pitch circle 6 obtained by dividing the arc of the pitch circle 6 by m, and the curved portion (13-59) of the tooth profile 52 of the male rotor 1 is N arc
Curved portion (58-59) is an arc of radius r centered on point 51 on pitch circle 5 equally divided, and intersection of pitch circle 6 with forward-side tooth profile curve 65 on the rotational direction front side of tooth profile 62 of female rotor 2. 69 is a creation curve of 69.
【0010】非対称歯形のスクリユ圧縮機は、雄ロータ
1を矢印の方向に回転駆動せしめると、雄ロータ1の歯
形52の回転方向後側の追従側歯形曲線54と回転方向
前側の前進側歯形曲線55の境界にあたる点13(追従
側歯形曲線54の終端)が、雌ロータ2の回転方向後側
の追従側歯形曲線64の主要部66(符号21、23の
間の線)と1点で接触して、該部の気密を保って吸入側
作用空間(図1の下側)と吐出側作用空間(図1の上
側)とを分離し、ついで雌ロータ2の歯形62のピッチ
円6上の点21が雄ロータ1の回転方向後側の追従側歯
形曲線54(線11−13)と1点で接触して、該部の
気密を保って吸入側作用空間と吐出側作用空間とを分離
する。その後において、前記2点間の雄雌両ロータ1、
2の回転方向後側の追従側歯形曲線54、64間に隙間
ができて、吸入側端板7と両ロータ1、2の吸入側の端
部とが気密を保って当接する最小限の面積を有する端面
(吸入側端面71という)が平坦であると、前記2点間
の雄雌両ロータ1、2の回転方向後側の追従側歯形曲線
54、64と吸入側端面とで囲まれた空間(これをバキ
ユーム空間という)を生ずる。このバキユーム空間は、
雄雌両ロータ1、2の回転に伴い容積を拡大するが、バ
キユーム空間の拡大の動作を繰り返しても、この隙間は
吸入側作用空間と吐出側作用空間の間の可圧縮性流体の
圧縮に関係のない空間であるから、動力損失を生じる。
本発明によると、雄ロータ1の追従側歯形曲線54と、
雌ロータ2の追従側歯形曲線64と、シリンダの平坦な
吸入側端面71によって囲まれたこのバキユーム空間7
2を、シリンダの吸入側端板7の吸入側端面71に形成
した窪み73を介して吸入側作用空間に連通せしめたか
ら、バキユーム空間72ができても直ちに吸入側作用空
間から可圧縮性流体がバキユーム空間に流入し、バキュ
ーム空間内の圧力が吸入側作用空間と同圧になるので、
動力損失は生じない。When the male rotor 1 is driven to rotate in the direction of the arrow, the screw compressor of the asymmetrical tooth profile has a following tooth profile curve 54 on the rear side in the rotational direction of the tooth profile 52 of the male rotor 1 and a forward tooth profile curve on the front side in the rotational direction. The point 13 (the end of the following-side tooth profile curve 54) corresponding to the boundary of the point 55 contacts the main part 66 (the line between the reference numerals 21 and 23) of the following-side tooth profile curve 64 on the rear side in the rotation direction of the female rotor 2 at one point. By separating the working space on the suction side (lower side in FIG. 1) and the working space on the discharge side (upper side in FIG. 1) while maintaining the airtightness of the portion, The point 21 comes into contact with the trailing tooth profile curve 54 (line 11-13) on the rear side in the rotation direction of the male rotor 1 at one point, and the suction side working space and the discharge side working space are separated while maintaining the airtightness of the portion. I do. Thereafter, the male and female rotors 1 between the two points,
2. A minimum area where the suction side end plate 7 and the suction side ends of the rotors 1 and 2 contact air-tightly with a gap formed between the follow-up side profile curves 54 and 64 on the rear side in the rotational direction of FIG. When the end face having the shape (referred to as the suction side end face 71) is flat, it is surrounded by the trailing side tooth profile curves 54, 64 on the rear side in the rotation direction of the male and female rotors 1, 2 between the two points and the suction side end face. A space (this is called bakyum space) is created. This space is
Although the volume increases with the rotation of the male and female rotors 1 and 2, even if the operation of expanding the vacuum space is repeated, this gap is used to compress the compressible fluid between the suction-side working space and the discharge-side working space. Power loss occurs because the space is irrelevant.
According to the present invention, the following tooth profile curve 54 of the male rotor 1;
This vacancy space 7 surrounded by the trailing tooth profile curve 64 of the female rotor 2 and the flat suction side end surface 71 of the cylinder.
2 communicates with the suction-side working space via the recess 73 formed in the suction-side end face 71 of the suction-side end plate 7 of the cylinder. Therefore, even if the vacuum space 72 is formed, the compressible fluid is immediately discharged from the suction-side working space. As it flows into the vacuum space and the pressure in the vacuum space becomes the same as the suction side working space,
No power loss occurs.
【0011】図4は、本発明の第2実施例の雄雌両ロー
タ1、2の回転軸3、4に垂直な断面図であって、図1
と同一の部分は同一の符号を付して示す。第2実施例
は、雌ロータ2は、その回転軸4に垂直な面におけるピ
ッチ円6の円弧をm等分したピッチ円6上の点61を中
心として半径rの円弧を略円弧状に描いたm個の62歯
形をピッチ円6内に形成し、雌ロータ2のピッチ円6内
の各円弧状歯形62の間には小型のアデンダム82をピ
ッチ円6外に形成する。雄ロータ1は、その回転軸3に
垂直な面におけるピッチ円5の円弧をn等分したピッチ
円5上の点51を中心として半径rの略円弧状に描いた
n個の歯形52をピッチ円5外に形成し、雄ロータ1の
ピッチ円5外の各円弧状歯形52の間には小型のデデン
ダム81をピッチ円5内に形成して空間容積の増加を図
ったものである。FIG. 4 is a sectional view of the male and female rotors 1, 2 according to a second embodiment of the present invention, which is perpendicular to the rotating shafts 3, 4. FIG.
The same parts as those shown in FIG. In the second embodiment, the female rotor 2 draws an arc having a radius r in a substantially arc shape around a point 61 on the pitch circle 6 obtained by equally dividing the arc of the pitch circle 6 in a plane perpendicular to the rotation axis 4 by m. The m teeth 62 are formed in the pitch circle 6, and a small addendum 82 is formed outside the pitch circle 6 between the arc-shaped teeth 62 in the pitch circle 6 of the female rotor 2. The male rotor 1 pitches n tooth profiles 52 drawn in a substantially arc shape with a radius r around a point 51 on the pitch circle 5 obtained by equally dividing the arc of the pitch circle 5 in a plane perpendicular to the rotation axis 3 by n. A small denden dam 81 is formed outside the circle 5 and between the arcuate tooth profiles 52 outside the pitch circle 5 of the male rotor 1 so as to increase the space volume in the pitch circle 5.
【0012】雌ロータ2の回転方向後側の追従側歯形曲
線64とピッチ円6の交点を点21、雄ロータ1の回転
方向後側の追従側歯形曲線54とピッチ円5の交点を点
11とすれば、雌ロータ2の歯形62の回転方向後側の
追従側歯形曲線64の主要部66(符号22、23の間
の線)を、雌ロータ2の歯形62の該主要部66(線2
2−23)と接触する雄ロータ1の歯形52の回転方向
後側の追従側歯形曲線54と回転方向前側の前進側歯形
曲線55の境界にあたる曲線12−13(追従側歯形曲
線54の終端)によって創成する曲線とし、雄ロータ1
の回転方向後側の追従側歯形曲線54の主要部56(符
号11、12間の線)は、雄ロータ1の該主要部56
(線11−12)に接触する雌ロータ2の歯形62のピ
ッチ円6上の点21によって創成する曲線としたもので
ある。雌ロータ2の歯形62のアデンダム82の形成に
より、アデンダム82の略中央部28から雌ロータ2の
回転方向後側の追従側歯形曲線64の点21までの間
を、雄ロータ1の回転方向後側の追従側歯形曲線54の
ピッチ円5の点11によって創成する曲線とし、雄ロー
タ1のデデンダム81の形成により、デデンダム81の
中央部18と雄ロータ1の歯形52の回転方向後側の追
従側歯形曲線54の点11(ピッチ円5上の点)までの
間を、雌ロータ2の点28によって創成する曲線とした
ものである。Point 21 is the intersection of the trailing tooth profile curve 64 on the rear side in the rotation direction of the female rotor 2 and the pitch circle 6, and point 11 is the intersection of the trailing tooth profile curve 54 on the rear side in the rotation direction of the male rotor 1 and the pitch circle 5. In this case, the main part 66 (the line between reference numerals 22 and 23) of the following tooth profile curve 64 on the rear side in the rotation direction of the tooth profile 62 of the female rotor 2 is changed to the main part 66 (line 2
2-23), a curve 12-13 (an end of the following-side tooth profile curve 54) which is a boundary between the trailing-side tooth profile curve 54 of the tooth profile 52 of the male rotor 1 in the rotation direction and the forward-side tooth profile curve 55 of the rotation direction front side. Male rotor 1
The main portion 56 (line between reference numerals 11 and 12) of the trailing tooth profile curve 54 on the rear side in the rotation direction of the male rotor 1 is
This is a curve created by the point 21 on the pitch circle 6 of the tooth profile 62 of the female rotor 2 that contacts the (line 11-12). Due to the formation of the addendum 82 of the tooth profile 62 of the female rotor 2, the distance between the substantially central portion 28 of the addendum 82 and the point 21 of the trailing tooth profile curve 64 on the rear side in the rotational direction of the female rotor 2 is set in the rotational direction of the male rotor 1. The follow-up side tooth profile curve 54 is a curve created by the point 11 of the pitch circle 5. By forming the denden dam 81 of the male rotor 1, the central portion 18 of the denden dam 81 and the tooth profile 52 of the male rotor 1 follow the rotational direction rearward. The curve up to the point 11 (point on the pitch circle 5) of the side tooth profile curve 54 is a curve created by the point 28 of the female rotor 2.
【0013】本実施例によるときは、雄ロータ1の歯形
52の回転方向後側の追従側歯形曲線54と回転方向前
側の前進側歯形曲線55の境界にあたる追従側歯形曲線
54(符号12、13の間の線)が、雌ロータ2の回転
方向後側の追従側歯形曲線64の主要部66(符号2
2、23の間の線)と1点で接触して、該部の気密を保
って吸入側作用空間(図4の下側)と吐出側作用空間
(図4の上側)とを分離し、ついで雌ロータ2の歯形6
2の回転方向後側の追従側歯形曲線64のピッチ円6上
の点21または該点に近接してピッチ円6内の歯形62
を構成する曲線が、雄ロータ1の回転方向後側の追従側
歯形曲線54と1点で接触して、該部の気密を保って吸
入側作用空間と吐出側作用空間とを分離するから、前記
2点間の雄雌両ロータ1、2間の歯形52、62に隙間
ができて前記2点間の空間に吸入動作を繰り返しても、
この隙間は吸入側作用空間と吐出側作用空間の間の作動
流体のない真空状態のバキユーム空間であるから、動力
損失につながる。本発明によると、雄ロータ1の追従側
歯形曲線54と、雌ロータ2の追従側歯形曲線64と、
シリンダの吸入側端面71によって囲まれたこのバキユ
ーム空間72を、シリンダの吸入側端面に形成した窪み
73を介して吸入側作用空間に連通せしめたから、バキ
ユーム空間72ができても直ちに吸入側作用空間から可
圧縮性流体がバキユーム空間に流入し、バキューム空間
の圧力が吸入側作用空間と同圧になるので、動力損失は
生じない。In the present embodiment, the following tooth profile curve 54 (reference numerals 12 and 13) which is the boundary between the following tooth profile curve 54 on the rear side in the rotation direction of the tooth profile 52 of the male rotor 1 and the forward tooth profile curve 55 on the front side in the rotation direction. Are the main parts 66 (reference numeral 2) of the following tooth profile curve 64 on the rear side in the rotation direction of the female rotor 2 on the rear side.
2 and 23) at one point to separate the suction-side working space (lower side in FIG. 4) and the discharge-side working space (upper side in FIG. 4) while maintaining the airtightness of the portion. Next, the tooth profile 6 of the female rotor 2
2 at the point 21 on the pitch circle 6 of the trailing-side tooth profile curve 64 on the rear side in the rotation direction, or the tooth profile 62 in the pitch circle 6 near the point.
Is in contact at one point with the trailing tooth profile curve 54 on the rear side in the rotation direction of the male rotor 1 to separate the suction-side working space and the discharge-side working space while keeping the portion airtight. Even if a gap is formed in the tooth profile 52, 62 between the male and female rotors 1, 2 between the two points and the suction operation is repeated in the space between the two points,
Since this gap is a vacuum space in a vacuum state with no working fluid between the suction-side working space and the discharge-side working space, it leads to power loss. According to the present invention, the following tooth profile curve 54 of the male rotor 1, the following tooth profile curve 64 of the female rotor 2,
Since the vacuum space 72 surrounded by the suction-side end face 71 of the cylinder is communicated with the suction-side working space through a recess 73 formed in the suction-side end face of the cylinder, the suction-side working space is immediately formed even if the vacuum space 72 is formed. , The compressible fluid flows into the vacuum space, and the pressure in the vacuum space becomes equal to that of the suction side working space, so that no power loss occurs.
【0014】図5ないし図10は、図4の実施例の作動
状況を、時間の経過とともに示した図である。図5は、
雄ロータ1が矢印方向に回転駆動され、その歯形52の
1つが雌ロータ2の歯形62の1つに噛み合おうとして
いるところであり、雌ロータ2の回転方向前側の前進側
歯形曲線65が雄ロータ1の回転方向前側の前進側歯形
曲線55と接触しているが、雌ロータ2の回転方向後側
の追従側歯形曲線64は未だ雄ロータ1の回転方向後側
の追従側歯形曲線54に接触せず、吐出側作用空間を吸
入側作用空間とシールしていない。FIGS. 5 to 10 show the operation of the embodiment of FIG. 4 over time. FIG.
The male rotor 1 is driven to rotate in the direction of the arrow, and one of the tooth profiles 52 is about to mesh with one of the tooth profiles 62 of the female rotor 2, and the forward tooth profile curve 65 on the front side in the rotation direction of the female rotor 2 is male. The forward-side tooth profile curve 55 on the front side in the rotation direction of the rotor 1 is in contact with the forward-side tooth profile curve 54 on the rear side in the rotation direction of the female rotor 2. There is no contact, and the discharge side working space is not sealed with the suction side working space.
【0015】つぎに雄ロータ1がさらに回転駆動される
と、図6に示すように、雄ロータ1の回転方向後側の追
従側歯形曲線54の線12−13は雌ロータ2の回転方
向後側の追従側歯形曲線64の線22−23と接触し
て、雄ロータ1の追従側歯形曲線54(線12−13)
と雌ロータ2の追従側歯形曲線64(線22−23)と
の間にシールを形成し、吐出側作用空間と吸入側作用空
間とを分離しはじめる。雄ロータ1がさらに回転して図
7に示す状態になると、雄ロータ1の回転方向後側の追
従側歯形曲線54の線12−13は、さらに雌ロータ2
の回転方向後側の追従側歯形曲線64の線22−23と
接触して、雄ロータ1の追従側歯形曲線54(線12−
13)と雌ロータ2の追従側歯形曲線64(線22−2
3)との間のシールはさらに広がり、雄ロータ1の回転
方向後側の追従側歯形曲線54に接触する雌ロータ2の
回転方向後側の追従側歯形曲線64の線11−12が、
雄ロータ1の回転方向後側の追従側歯形曲線52に接触
して、雄ロータ1の追従側歯形曲線54と雌ロータ2の
追従側歯形曲線64のシールが始まり、図9に示すよう
に、バキユーム空間72の後端を閉じてバキユーム空間
72を形成し、吐出側作用空間と吸入側作用空間との間
の分離を開始する。Next, when the male rotor 1 is further driven to rotate, as shown in FIG. 6, the line 12-13 of the following tooth profile curve 54 on the rear side in the rotation direction of the male rotor 1 The tooth profile curve 64 of the male rotor 1 is in contact with the line 22-23 of the tooth profile curve 64 on the side (line 12-13).
And a follower profile 64 (line 22-23) of the female rotor 2 to form a seal and begin to separate the discharge working space and the suction working space. When the male rotor 1 further rotates to the state shown in FIG. 7, the line 12-13 of the following tooth profile curve 54 on the rear side in the rotation direction of the male rotor 1 further shows the female rotor 2
Contact the line 22-23 of the trailing tooth profile curve 64 on the rear side in the rotational direction of the male rotor 1 and follow the trailing tooth profile curve 54 (line 12-
13) and the following tooth profile curve 64 of the female rotor 2 (line 22-2).
3), the line 11-12 of the trailing tooth profile curve 64 on the rear side in the rotation direction of the female rotor 2 that contacts the trailing tooth profile curve 54 on the rear side in the rotation direction of the male rotor 1
In contact with the trailing tooth profile curve 52 on the rear side in the rotation direction of the male rotor 1, the sealing of the trailing tooth profile curve 54 of the male rotor 1 and the trailing tooth profile curve 64 of the female rotor 2 starts, as shown in FIG. The back end of the vacuum space 72 is closed to form the vacuum space 72, and separation between the discharge-side working space and the suction-side working space is started.
【0016】このとき、バキユーム空間72を形成する
が、バキユーム空間72は吸入側端板7の吸入側端面7
1に形成した窪み73に開口しているので、バキユーム
空間72には吸入側作用空間の可圧縮性流体が自由に流
入し、バキューム空間内の圧力が吸入側作用空間と同圧
になるので、バキユーム空間72が形成されても動力損
失は生じない。さらに、雄ロータ1が回転駆動される
と、図8、図9に示すように、バキューム空間72の容
積が拡大するが、バキューム空間72は吸入端板7の吸
入側端面71に形成した窪み73に開口しているので、
バキューム空間72には吸入側作用空間の可圧縮性流体
が自由に流入し、バキューム空間の容積が拡大されても
動力損失は生じない。図10に示す状態に雄ロータ1が
回転駆動されると、雄ロータ1の回転方向前側の前進側
歯形曲線55が雌ロータ2の回転方向前側の前進側歯形
曲線65から離れるとともに、雄ロータ1の回転方向後
側の追従側歯形曲線54と回転方向前側の前進側歯形曲
線55の境界にあたる回転方向後側の追従側歯形曲線5
4の線12−13が、雌ロータ2の回転方向後側の追従
側歯形曲線64の線22−23からも離れて、バキユー
ム空間72を形成する両ロータ1、2の歯形52、62
の回転方向前側の一方のシールを開放することになり、
バキユーム空間72は完全に解消して動力損失を生じな
い。At this time, a vacuum space 72 is formed, and the vacuum space 72 is formed by the suction-side end face 7 of the suction-side end plate 7.
1, the compressible fluid in the suction-side working space flows freely into the vacuum space 72, and the pressure in the vacuum space becomes the same as the suction-side working space. Even if the vacuum space 72 is formed, no power loss occurs. Further, when the male rotor 1 is driven to rotate, the volume of the vacuum space 72 is increased as shown in FIGS. 8 and 9, but the vacuum space 72 is formed by a depression 73 formed in the suction side end face 71 of the suction end plate 7. Because it is open to
The compressible fluid in the suction-side working space freely flows into the vacuum space 72, and no power loss occurs even if the volume of the vacuum space is enlarged. When the male rotor 1 is rotationally driven in the state shown in FIG. 10, the forward tooth profile curve 55 on the front side in the rotation direction of the male rotor 1 is separated from the forward tooth profile curve 65 on the front side in the rotation direction of the female rotor 2, and the male rotor 1 is rotated. The following tooth profile curve 5 on the rear side in the rotation direction, which is the boundary between the following tooth profile curve 54 on the rear side in the rotation direction and the forward tooth profile curve 55 on the front side in the rotation direction.
4 is also separated from the line 22-23 of the trailing tooth profile curve 64 on the rear side in the rotation direction of the female rotor 2, and the tooth profiles 52, 62 of both rotors 1, 2 forming the vacuum space 72.
One of the seals on the front side in the rotation direction will be opened,
The space 72 is completely eliminated and no power loss occurs.
【0017】なお、本発明を実施例について説明した
が、本発明は図示の実施例に限定するものではなく、特
許請求の範囲に記載の技術思想の範囲内で、非対称歯形
のスクリユ回転機械に適用できる。また、本発明の作動
を圧縮機について説明したが、圧縮機のみではなく膨張
機にも、圧縮した流体や膨張した流体を移送するスクリ
ユ回転機械にも、同様に応用可能である。Although the present invention has been described with reference to the embodiment, the present invention is not limited to the illustrated embodiment, but may be applied to an asymmetric tooth-shaped screw rotating machine within the scope of the technical idea described in the claims. Applicable. In addition, although the operation of the present invention has been described with respect to a compressor, the present invention can be similarly applied not only to a compressor but also to an expander, and to a screw rotating machine for transferring a compressed fluid or an expanded fluid.
【0018】[0018]
【発明の効果】本発明は、平行な二軸の回りを相互に接
触しながら回転する二個のスクリユ・ロータであって、
その一方がその回転軸に垂直な面におけるピッチ円の円
弧をm等分したピッチ円上の点を中心として、略円弧状
に描いたm個の歯形をピッチ円内に形成した雌ロータ、
他方がその回転軸に垂直な面におけるピッチ円の円弧を
n等分したピッチ円上の点を中心として、略円弧状に描
いたn個の歯形をピッチ円外に形成した雄ロータであ
る、雌雄のロータを有するとともに、雌ロータの歯形の
回転方向後側の追従側歯形曲線の主要部を、雌ロータの
該主要部分に接触する雄ロータの歯形の回転方向後側の
追従側歯形曲線と回転方向前側の前進側歯形曲線の境界
にあたる追従側歯形曲線上の点または曲線によって創成
する曲線とし、雄ロータの回転方向後側の追従側歯形曲
線の主要部を、雄ロータの該主要部分に接触する雌ロー
タの歯形の回転方向後側の追従側曲線のピッチ円上の点
または該点に近接してピッチ円内の歯形を構成する曲線
によって創成する曲線とした非対称歯形のスクリュ回転
機械において、雄ロータの追従側歯形曲線と、雌ロータ
の追従側歯形曲線と、シリンダの吸入側端面によって囲
まれたバキユーム空間を、ケーシングのシリンダの吸入
側端面に形成した窪みを介して吸入側作用空間に連通せ
しめたものであるから、雄ロータ1の追従側歯形曲線5
4と、雌ロータ2の追従側歯形曲線64と、ケーシング
9のシリンダの平坦な吸入側端面71とによって囲まれ
たバキユーム空間72を、シリンダの吸入側端板7の吸
入側端面71に形成した窪み73を介して吸入側作用空
間に連通せしめたから、バキューム空間72ができても
直ちに吸入側作用空間から可圧縮性流体がバキューム空
間に流入し、バキューム空間内の圧力が吸入側作用空間
と同圧になるので、動力損失は生じない。また、雄ロー
タ1の追従側歯形曲線54と雌ロータ2の追従側歯形曲
線64との接触位置は限られているから、窪み73を設
けるのに場所をとらない。According to the present invention, there are provided two screw rotors which rotate around two parallel axes while contacting each other,
A female rotor in which m teeth formed in a substantially circular arc shape are formed in the pitch circle, with one of the centers being a point on the pitch circle obtained by equally dividing the arc of the pitch circle on a plane perpendicular to the rotation axis,
The other is a male rotor in which n teeth formed in a substantially arc shape are formed outside the pitch circle, with a center on a point on the pitch circle obtained by equally dividing the arc of the pitch circle in a plane perpendicular to the rotation axis into n. With male and female rotors, the main part of the trailing-side tooth profile curve on the rear side in the rotational direction of the female rotor tooth profile is the same as the trailing direction tooth profile curve on the rotational direction rear of the male rotor tooth profile in contact with the main part of the female rotor. A curve or a curve created by points or curves on the following tooth profile curve that is the boundary of the forward-side tooth profile curve on the front side in the rotation direction, and the main part of the following tooth profile curve on the rear side in the rotation direction of the male rotor is added to the main part of the male rotor. In a screw rotating machine having an asymmetrical tooth profile, a curve is formed by a point on a pitch circle of a follower curve on the rear side in the rotational direction of the tooth profile of a female rotor in contact with the curve or a curve forming a tooth profile in the pitch circle in close proximity to the point. , Male The vacuum space surrounded by the follower side tooth profile curve of the rotor, the follower side profile curve of the female rotor, and the suction side end face of the cylinder communicates with the suction side working space via a recess formed in the suction side end face of the cylinder of the casing. Therefore, the following tooth profile curve 5 of the male rotor 1
4, a follow-up tooth profile curve 64 of the female rotor 2 and a flat suction-side end face 71 of the cylinder of the casing 9 are formed in the suction-side end face 71 of the suction-side end plate 7 of the cylinder. Since it is connected to the suction side working space through the recess 73, even if the vacuum space 72 is formed, the compressible fluid immediately flows into the vacuum space from the suction side working space, and the pressure in the vacuum space becomes the same as that of the suction side working space. No power loss occurs due to pressure. Further, since the contact position between the following-side tooth profile curve 54 of the male rotor 1 and the following-side tooth profile curve 64 of the female rotor 2 is limited, a space is not required for providing the depression 73.
【図1】本発明の一実施例の、回転軸に垂直な断面図。FIG. 1 is a cross-sectional view of one embodiment of the present invention, which is perpendicular to a rotation axis.
【図2】その回転軸に平行な平面図。FIG. 2 is a plan view parallel to the rotation axis.
【図3】図2のA−A線に沿う断面図。FIG. 3 is a sectional view taken along line AA of FIG. 2;
【図4】本発明の他の一実施例の、回転軸に垂直な断面
図。FIG. 4 is a cross-sectional view of another embodiment of the present invention, which is perpendicular to the rotation axis.
【図5】ないしFIG. 5
【図10】図4の実施例の作動状況を、時間の経過とと
もに示した図である。FIG. 10 is a diagram showing an operation state of the embodiment of FIG. 4 over time.
1……雄ロータ、 3……雄ロータの回転軸、 5……雄ロータのピッチ円、 51……雄ロータのピッチ円弧のn等分点、 52……雄ロータの歯形、 53……雄ロータの歯元部、 54……雄ロータの回転方向後側の追従側歯形曲線、 55……雄ロータの回転方向前側の前進側歯形曲線、 2……雌ロータ、 4……雌ロータの回転軸、 6……雌ロータのピッチ円、 61……雌ロータのピッチ円弧のm等分点、 62……雌ロータの歯形、 63……雌ロータの歯先部、 64……雌ロータの回転方向後側の追従側歯形曲線、 65……雌ロータの回転方向前側の前進側歯形曲線、 7……吸入側端板、 71……その吸入側端面、 72……バキユーム空間、 73……窪み、 8……吐出側端板、 9……ケーシングである。 1 ... male rotor, 3 ... rotation axis of male rotor, 5 ... pitch circle of male rotor, 51 ... n equal points of pitch arc of male rotor, 52 ... tooth profile of male rotor, 53 ... male Tooth root portion of the rotor, 54: Trailing tooth profile curve on the rear side in the rotation direction of the male rotor, 55 ... Forward tooth profile curve on the front side in the rotation direction of the male rotor, 2 ... Female rotor, 4 ... Rotation of the female rotor Shaft, 6: Female rotor pitch circle, 61: m equidistant point of female rotor pitch arc, 62: Female rotor tooth profile, 63: Female rotor tooth tip, 64: Female rotor rotation Follow-up tooth profile curve on the rear side in the direction, 65: Forward profile tooth profile on the front side in the rotation direction of the female rotor, 7: Suction-side end plate, 71: The suction-side end face, 72: Backspace space, 73: Depression , 8 ... discharge side end plate, 9 ... casing.
Claims (2)
ら回転する二個のスクリユ・ロータであって、その一方
がその回転軸に垂直な面におけるピッチ円の円弧をm等
分したピッチ円上の点を中心として、略円弧状に描いた
m個の歯形をピッチ円内に形成した雌ロータ、他方がそ
の回転軸に垂直な面におけるピッチ円の円弧をn等分し
たピッチ円上の点を中心として、略円弧状に描いたn個
の歯形をピッチ円外に形成した雄ロータである、雌雄の
ロータを有するとともに、雌ロータの歯形の回転方向後
側の追従側歯形曲線の主要部を、雌ロータの該主要部に
接触する雄ロータの歯形の回転方向後側の追従側歯形曲
線と回転方向前側の前進側歯形曲線の境界にあたる追従
側歯形曲線上の点または曲線によって創成する曲線と
し、雄ロータの回転方向後側の追従側歯形曲線の主要部
を、雄ロータの該主要部に接触する雌ロータの歯形の回
転方向後側の追従側歯形曲線のピッチ円上の点または該
点に近接してピッチ円内の歯形を構成する曲線によって
創成する曲線とした非対称歯形のスクリュ回転機械にお
いて、雄ロータの追従側歯形曲線と、雌ロータの追従側
歯形曲線と、シリンダの吸入側端面によって囲まれたバ
キユーム空間を、シリンダの吸入側端面に形成した窪み
を介して吸入側作用空間に連通せしめたことを特徴とす
るスクリユ回転機械。1. Two screw rotors rotating around two parallel axes while contacting each other, one of which is a pitch obtained by equally dividing the arc of a pitch circle in a plane perpendicular to the rotation axis by m. A female rotor in which m teeth formed in a substantially arc shape are formed in a pitch circle around a point on the circle, and the other is a pitch circle obtained by equally dividing the arc of the pitch circle in a plane perpendicular to the rotation axis by n. A male rotor having male and female rotors in which n teeth shapes drawn in a substantially arc shape are formed outside the pitch circle with the center of the point as a center, and a follower-side tooth profile curve on the rear side in the rotational direction of the female rotor tooth profile. The main part is created by a point or curve on the trailing tooth profile curve which is the boundary between the trailing tooth profile curve on the rear side in the rotational direction and the forward profile tooth curve on the front side in the rotational direction of the tooth profile of the male rotor in contact with the main part of the female rotor. And the rotation direction of the male rotor The main part of the trailing profile curve on the rear side is defined as a point on the pitch circle of the trailing profile curve on the rear side in the rotational direction of the tooth profile of the female rotor in contact with the main part of the male rotor or a pitch circle close to the point. In a screw rotating machine with an asymmetrical tooth profile that is a curve created by a curve that constitutes a tooth profile in the inside, a vacuum space surrounded by a following tooth profile curve of a male rotor, a following tooth profile curve of a female rotor, and a suction end surface of a cylinder. Is connected to the suction-side working space via a recess formed in the suction-side end face of the cylinder.
ら回転する二個のスクリユ・ロータであって、その一方
がその回転軸に垂直な面におけるピッチ円の円弧をm等
分したピッチ円上の点を中心として、略円弧状に描いた
m個の大型の歯形をピッチ円内に形成し、ピッチ円内の
各円弧状歯形の間には小型のアデンダムをピッチ円外に
形成した雌ロータ、他方がその回転軸に垂直な面におけ
るピッチ円の円弧をn等分したピッチ円上の点を中心と
して、略円弧状に描いたn個の大型の歯形をピッチ円外
に形成し、ピッチ円外の各円弧状歯形の間には小型のデ
デンダムをピッチ円内に形成した雄ロータである、雌雄
のロータを有するとともに、雌ロータの歯形の回転方向
後側の追従側歯形曲線の主要部を、雌ロータの該主要部
に接触する雄ロータの歯形の回転方向後側の追従側歯形
曲線と回転方向前側の前進側歯形曲線の境界にあたる追
従側歯形曲線上の点または曲線によって創成する曲線と
し、雄ロータの回転方向後側の追従側歯形曲線の主要部
を、雄ロータの該主要部に接触する雌ロータの歯形の回
転方向後側の追従側歯形曲線のピッチ円上の点または該
点に近接してピッチ円内の歯形を構成する曲線によって
創成する曲線とした非対称歯形のスクリユ回転機械にお
いて、雄ロータの追従側歯形曲線と、雌ロータの追従側
歯形曲線と、シリンダの吸入側端面によって囲まれたバ
キユーム空間を、シリンダの吸入側端面に形成した窪み
を介して吸入側作用空間に連通せしめたことを特徴とす
る請求項1に記載のスクリユ回転機械。2. A two-screw rotor which rotates while being in contact with each other about two parallel axes, one of which is a pitch obtained by equally dividing an arc of a pitch circle on a plane perpendicular to the rotation axis by m. M large tooth shapes drawn in a substantially arc shape around the point on the circle were formed in the pitch circle, and a small addendum was formed outside the pitch circle between each arc shape tooth in the pitch circle. The female rotor, the other of which is formed with n large tooth shapes outside the pitch circle in a substantially arc shape, centered on a point on the pitch circle obtained by equally dividing the arc of the pitch circle on a plane perpendicular to the rotation axis by n. A male rotor in which a small denden dam is formed in the pitch circle between the arc-shaped tooth profiles outside the pitch circle, having male and female rotors, and a follow-up tooth profile curve on the rear side in the rotational direction of the female rotor tooth profile. The main part of the male rotor that contacts the main part of the female rotor A curve created by a point or curve on the trailing tooth profile curve that is the boundary between the trailing profile curve on the rear side in the rotational direction of the tooth profile and the forward profile curve on the forward side in the rotational direction, and the trailing profile curve on the rear side in the rotational direction of the male rotor. A point on the pitch circle of the following tooth profile curve on the rear side in the rotational direction of the tooth profile of the female rotor that contacts the main portion of the male rotor, or a curve forming a tooth profile in the pitch circle in the vicinity of the point. In the screw rotating machine of an asymmetrical tooth profile having a curve created by the following, the following space is surrounded by the following tooth profile curve of the male rotor, the following tooth profile curve of the female rotor, and the suction side end face of the cylinder. 2. The screw rotating machine according to claim 1, wherein the screw rotating machine communicates with the suction-side working space through a recess formed in the rotary member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5257197A JPH10238483A (en) | 1997-02-21 | 1997-02-21 | Screw rotary machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5257197A JPH10238483A (en) | 1997-02-21 | 1997-02-21 | Screw rotary machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH10238483A true JPH10238483A (en) | 1998-09-08 |
Family
ID=12918507
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5257197A Pending JPH10238483A (en) | 1997-02-21 | 1997-02-21 | Screw rotary machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH10238483A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007321726A (en) * | 2006-06-05 | 2007-12-13 | Denso Corp | Screw compressor |
CN104728117A (en) * | 2015-02-17 | 2015-06-24 | 上海偌托新能源科技有限公司 | Helical teeth of compression heat pump helix main engine and compression heat pump helix main engine |
-
1997
- 1997-02-21 JP JP5257197A patent/JPH10238483A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007321726A (en) * | 2006-06-05 | 2007-12-13 | Denso Corp | Screw compressor |
CN104728117A (en) * | 2015-02-17 | 2015-06-24 | 上海偌托新能源科技有限公司 | Helical teeth of compression heat pump helix main engine and compression heat pump helix main engine |
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