JP2997346B2 - Screw compressor - Google Patents
Screw compressorInfo
- Publication number
- JP2997346B2 JP2997346B2 JP3248934A JP24893491A JP2997346B2 JP 2997346 B2 JP2997346 B2 JP 2997346B2 JP 3248934 A JP3248934 A JP 3248934A JP 24893491 A JP24893491 A JP 24893491A JP 2997346 B2 JP2997346 B2 JP 2997346B2
- Authority
- JP
- Japan
- Prior art keywords
- slide valve
- peripheral surface
- cylinder
- screw compressor
- outer peripheral
- 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.)
- Expired - Fee Related
Links
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、スクリュー圧縮機に係
り、とくにスライド弁が円滑に摺動するのに好適なスク
リュー圧縮機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw compressor, and more particularly to a screw compressor suitable for a slide valve to slide smoothly.
【０００２】[0002]
【従来の技術】従来のスクリュー圧縮機は、たとえば特
開昭６３−９６９４号公報に記載されているように、吐
出アキシャルボートを設けているサイドカバーに、スラ
イド弁の半径方向の動きを規制する案内面を備え、スラ
イド弁を案内面に案内させて移動させスライド弁と１対
のスクリューロータとの接触を防止するものが提案され
ている。2. Description of the Related Art In a conventional screw compressor, for example, as described in Japanese Patent Application Laid-Open No. 63-9694, a side cover provided with a discharge axial boat restricts the radial movement of a slide valve. It has been proposed to provide a guide surface and to move the slide valve by guiding it to the guide surface to prevent contact between the slide valve and a pair of screw rotors.
【０００３】[0003]
【発明が解決しようとする課題】上記従来技術では、ス
ライド弁が摺動するために設けられたシリンダとの隙間
が全円周に亘って径方向を均等にならない。すなわち、
たとえばスライド弁とシリンダとをそれぞれ所定の間隙
を有するように製作したとしても、スライド弁を駆動す
るため、駆動シリンダ内に圧力ガスの給排によって摺動
するピストンの先端部とボルトなどによって接続するさ
いの僅少な取付誤差などによってスライド弁の外周面の
円弧を形成する曲率半径中心点がシリンダの中心点と偏
心し、これが原因でスライド弁の外周面一部がシリンダ
の内周面対向位置に当っていわゆる片当りといわれる現
象を起こすことが実際上発生する。このような片当り現
象を起こすと、当該接触部分の接触抵抗が増加してスラ
イド弁の摺動が不円滑になるという問題があった。In the above prior art, the clearance between the slide valve and the cylinder provided for sliding is not uniform in the radial direction over the entire circumference. That is,
For example, even if the slide valve and the cylinder are manufactured so as to have a predetermined gap, respectively, in order to drive the slide valve, the tip of the piston that slides by supplying and discharging the pressurized gas into the drive cylinder is connected with a bolt or the like. Due to a slight mounting error, the center point of the radius of curvature that forms the arc of the outer surface of the slide valve is eccentric with the center point of the cylinder, which causes a part of the outer surface of the slide valve to face the inner surface of the cylinder. In effect, a phenomenon called so-called one-side hit occurs. When such a one-sided contact phenomenon occurs, there is a problem that the contact resistance of the contact portion is increased and the sliding of the slide valve is not smooth.
【０００４】本発明の目的は、シリンダの内周面と、該
シリンダ内を摺動するスライド弁の外周面との径方向の
隙間を均等にし、スライド弁を円滑に摺動可能とするス
クリュー圧縮機を提供することにある。[0004] It is an object of the present invention to make a radial gap between an inner peripheral surface of a cylinder and an outer peripheral surface of a slide valve that slides in the cylinder uniform, so that a screw compression that enables the slide valve to slide smoothly. To provide machines.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明のスクリュー圧縮機においては、スライド弁
の外周面の曲率中心を基準として対称となる両側部に、
シリンダの内周面との径方向の間隙が他の部分よりも大
きくなるように一対の切欠部を設け、上記シリンダの内
周面と切欠部で形成される間隙に上記スクリュー圧縮機
からの吐出気体を接続した。In order to achieve the above object, in a screw compressor according to the present invention, a slide valve is provided.
On both sides that are symmetric with respect to the center of curvature of the outer peripheral surface of
The radial gap with the inner peripheral surface of the cylinder is larger than other parts.
A pair of notches are provided so that
The screw compressor is inserted into the gap formed by the peripheral surface and the notch.
Was connected .
【０００６】[0006]
【０００７】[0007]
【０００８】[0008]
【作用】本発明によれば、スクリュー圧縮機から１対の
切欠部に送入した吐出気体の圧力によりスライド弁の外
周面を形成する円弧の曲率半径中心点をシリンダの中心
点に規制するので、スライド弁の外周面とシリンダの内
周面との半径方向の間隙が均等になる。したがってスラ
イド弁の外周面がシリンダの内周面に片当りしてスライ
ド弁の摺動が不円滑になるのを防止することができる。According to the present invention, the center of the radius of curvature of the arc forming the outer peripheral surface of the slide valve is regulated to the center of the cylinder by the pressure of the discharge gas sent from the screw compressor into the pair of notches. Thus, the radial gap between the outer peripheral surface of the slide valve and the inner peripheral surface of the cylinder becomes uniform. Therefore, it is possible to prevent the slide valve from sliding unevenly due to the outer peripheral surface of the slide valve hitting the inner peripheral surface of the cylinder.
【０００９】[0009]
【００１０】[0010]
【実施例】以下、本発明の一実施例を示す図１および図
２により説明する。なお、図１は本発明によるスクリュ
ー圧縮機の縦断面図、図２は図１のＩＩ−ＩＩ矢視断面
図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 is a longitudinal sectional view of the screw compressor according to the present invention, and FIG. 2 is a sectional view taken along the line II-II of FIG.
【００１１】同図に示すように、ケーシング１内には、
互いに噛合い状態で回転することにより吸入口７よりの
ガスを圧縮して吐出室９に吐出する一対のおすロータ２
およびめすロータ３と、おすロータ２を駆動する電動機
４が収納されている。上記おすロータ２の軸２ａおよび
めすロータ３の軸３ａ（図示せず）はそれぞれケーシン
グ１に取り付けられた軸受５によって回転自在に支持さ
れ、かつおすロータ２の軸２ａは電動機４に直結してい
る。上記吸入口７は吸入管６により蒸発器１５に接続
し、上記吐出室９は上記ケーシング１の吐出側に固定さ
れた吐出側サイドカバー８内に設けられており、上記吐
出側サイドカバー８内に固定された油分離器１６内を通
って吐出管１０により凝縮器１３に接続されている。該
凝縮器１３は膨脹弁１４を介して上記蒸発器１５に接続
している。また上記ケーシング１内には、おすロータ
２、めすロータ３の外周面と微小な隙間を保持しつつシ
リンダ１７内を軸方向に摺動するスライド弁１１が設け
られている。該スライド弁１１は、ピストンロッド１２
ｂを介して駆動シリンダ１２内を摺動するピストン１２
ａに接続している。該ピストン１２ａは駆動シリンダ１
２のヘッド室１２ｃ内への作動油の給排によって摺動
し、図１に対して右方向に摺動するとスライド弁１１が
右方向に摺動してケーシング１内の圧縮途中のガスが吸
入口７にバイパスする量を増加し、図１に対して左方向
に摺動すると、ケーシング１内の圧縮途中のガスが吸入
口７にバイパスする量を減少する。一方スライド弁１１
には、図２に示すように、軸方向と直角な断面平面にそ
の外周面の円弧を形成する曲率中心点１１ｂを基準とし
て点対称となる位置に２個で１対の切欠部１１ｃを設置
している。As shown in FIG.
A pair of male rotors 2 that rotate in a meshed state to compress the gas from the suction port 7 and discharge the gas into the discharge chamber 9
A female rotor 3 and an electric motor 4 for driving the male rotor 2 are housed therein. The shaft 2a of the male rotor 2 and the shaft 3a (not shown) of the female rotor 3 are rotatably supported by bearings 5 attached to the casing 1, respectively, and the shaft 2a of the male rotor 2 is directly connected to the electric motor 4. I have. The suction port 7 is connected to an evaporator 15 by a suction pipe 6, and the discharge chamber 9 is provided in a discharge side cover 8 fixed to the discharge side of the casing 1. Is connected to the condenser 13 by the discharge pipe 10 through the inside of the oil separator 16 fixed to the oil separator 16. The condenser 13 is connected to the evaporator 15 via an expansion valve 14. In the casing 1, a slide valve 11 that slides in the cylinder 17 in the axial direction while maintaining a small gap with the outer peripheral surfaces of the male rotor 2 and the female rotor 3 is provided. The slide valve 11 includes a piston rod 12
piston 12 sliding in drive cylinder 12 through b
a. The piston 12a is a driving cylinder 1
2 slides due to the supply and discharge of hydraulic oil into and from the head chamber 12c. When the slide valve slides rightward with respect to FIG. 1, the slide valve 11 slides rightward, and the gas under compression in the casing 1 is sucked. By increasing the amount of bypass to the port 7 and sliding leftward with respect to FIG. 1, the amount of gas that is being compressed in the casing 1 and bypassing to the inlet 7 decreases. On the other hand, slide valve 11
As shown in FIG. 2, two pairs of notches 11c are provided at positions symmetrical with respect to a center of curvature 11b forming an arc of the outer peripheral surface on a cross-sectional plane perpendicular to the axial direction. are doing.
【００１２】つぎに上記スライド弁１１の切欠部１１ｃ
の動作について説明する。Next, the notch 11c of the slide valve 11
Will be described.
【００１３】スライド弁１１の１対の切欠部１１ｃに
は、それぞれ吐出室９からの吐出ガスが吸入する。この
とき、１対の切欠部１１ｃはスライド弁１１の中心点１
１ｂを基準として点対称となる位置に設置されているた
め、１対の切欠部１１ｃ内に吸入された吐出ガス圧力は
スライド弁１１の中心点１１ｂに向って完全にバランス
した状態で対向方向に作用する。そのため、スライド弁
１１の外周面とシリンダ１７の内周面との径方向の隙間
が均等になるようにスライド１１の曲率中心点１１ｂの
位置を規制することができ、これによってスライド弁１
１の外周面一部がシリンダ１７の内周面に片当りするの
を防止してスライド弁１１が円滑に摺動することができ
る。The discharge gas from the discharge chamber 9 is sucked into the pair of notches 11c of the slide valve 11, respectively. At this time, the pair of cutouts 11 c are located at the center point 1 of the slide valve 11.
1b, the discharge gas pressure sucked into the pair of notches 11c is opposed to the slide valve 11 in a completely balanced state toward the center point 11b. Works. Therefore, the position of the center of curvature 11b of the slide 11 can be regulated so that the radial gap between the outer peripheral surface of the slide valve 11 and the inner peripheral surface of the cylinder 17 becomes uniform.
The slide valve 11 can slide smoothly by preventing a part of the outer peripheral surface of the cylinder 1 from hitting against the inner peripheral surface of the cylinder 17.
【００１４】なお、上記の実施例においては、１対の切
欠部１１ｃをスライド弁１１の曲率中心点１１ｂを基準
として点対称となる位置に設置した場合を示すが、これ
に限定されるものでなく、たとえばスライド弁の外周面
一部に互いに対向する位置にほぼ同一の大きさの１対の
切欠部１１ｃを設置することも可能である。In the above-described embodiment, a case is shown in which the pair of cutouts 11c are installed at positions that are point-symmetric with respect to the center of curvature 11b of the slide valve 11, but the present invention is not limited to this. Instead, for example, it is also possible to install a pair of notches 11c of substantially the same size at positions facing each other on a part of the outer peripheral surface of the slide valve.
【００１５】[0015]
【発明の効果】本発明によれば、スクリュー圧縮機から
１対の切欠部に送入した吐出気体の圧力によりスライド
弁の外周面を形成する円弧の曲率半径中心をシリンダの
中心点に規制するので、スライド弁の外周面とシリンダ
の内周面との半径方向の間隙が均等になる。したがって
スライド弁の外周面がシリンダの内周面に片当りしてス
ライド弁の摺動が不円滑になるのを防止することができ
る。According to the present invention, the center of the radius of curvature of the arc forming the outer peripheral surface of the slide valve is regulated to the center point of the cylinder by the pressure of the discharge gas fed from the screw compressor into the pair of notches. Therefore, the radial gap between the outer peripheral surface of the slide valve and the inner peripheral surface of the cylinder becomes uniform. Therefore, it is possible to prevent the slide valve from sliding unevenly due to the outer peripheral surface of the slide valve hitting the inner peripheral surface of the cylinder.
【００１６】[0016]
【図１】本発明の一実施例を示すスクリュー圧縮機の縦
断面図。FIG. 1 is a longitudinal sectional view of a screw compressor showing one embodiment of the present invention.
【図２】図１のＩＩ−ＩＩ矢視断面図。FIG. 2 is a sectional view taken along the line II-II in FIG.
【符号の説明】 １…ケーシング、２…おすロータ、３…めすロータ、４
…電動機、７…吸入口、８…吐出側サイドカバー、９…
吐出室、１１…スライド弁、１１ａ…スライド弁摺動
面、１１ｂ…スライド弁中心点、１１ｃ…スライド弁切
欠部、１２…駆動シリンダ。[Description of References] 1 ... Casing, 2 ... Male rotor, 3 ... Female rotor, 4
... Electric motor, 7 ... Suction port, 8 ... Discharge side cover, 9 ...
Discharge chamber, 11 slide valve, 11a slide valve sliding surface, 11b slide valve center point, 11c slide valve notch, 12 drive cylinder.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−58077（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F04C 18/16 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-58077 (JP, A) (58) Field surveyed (Int. Cl. 7 , DB name) F04C 18/16
Claims (1)
の外周面の曲率中心を基準として対称となる両側部に、
シリンダの内周面との径方向の間隙が他の部分よりも大
きくなるように一対の切欠部を設け、上記シリンダの内
周面と切欠部で形成される間隙に上記スクリュー圧縮機
からの吐出気体を接続したことを特徴とするスクリュー
圧縮機。A slide valve in a screw compressor.
On both sides that are symmetric with respect to the center of curvature of the outer peripheral surface of
The radial gap with the inner peripheral surface of the cylinder is larger than other parts.
A pair of notches are provided so that
The screw compressor is inserted into the gap formed by the peripheral surface and the notch.
A screw compressor to which the gas discharged from the compressor is connected .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3248934A JP2997346B2 (en) | 1991-09-27 | 1991-09-27 | Screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3248934A JP2997346B2 (en) | 1991-09-27 | 1991-09-27 | Screw compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0587071A JPH0587071A (en) | 1993-04-06 |
| JP2997346B2 true JP2997346B2 (en) | 2000-01-11 |
Family
ID=17185591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3248934A Expired - Fee Related JP2997346B2 (en) | 1991-09-27 | 1991-09-27 | Screw compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2997346B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007030114A1 (en) * | 2005-09-07 | 2007-03-15 | Carrier Corporation | Slide valve |
| CN103527485A (en) * | 2012-07-02 | 2014-01-22 | 珠海格力电器股份有限公司 | Slide valve for screw compressor and screw compressor comprising same |
-
1991
- 1991-09-27 JP JP3248934A patent/JP2997346B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0587071A (en) | 1993-04-06 |
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