JP2005030361A - Screw compressor - Google Patents

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JP2005030361A
JP2005030361A JP2003273303A JP2003273303A JP2005030361A JP 2005030361 A JP2005030361 A JP 2005030361A JP 2003273303 A JP2003273303 A JP 2003273303A JP 2003273303 A JP2003273303 A JP 2003273303A JP 2005030361 A JP2005030361 A JP 2005030361A
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cylinder chamber
covering member
screw rotor
peripheral surface
screw
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JP4103709B2 (en
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Hiromichi Ueno
広道 上野
Nozomi Goto
望 後藤
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Daikin Industries Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a screw compressor enabling an increase in performance by eliminating a clearance between the inner surface of a slide valve and the peripheral surface of a cylinder chamber. <P>SOLUTION: This screw compressor comprises a casing 1, a screw rotor 2, and a slide valve 3. A covering member 4 softer than the vane 21 of the screw rotor 2 is installed on the inner surface 30 of the slide valve 3. Also, the inner surface 40 of the covering member 4 is disposed on the inside of the peripheral surface 10 of the cylinder chamber 12 in the casing 1 to eliminate the clearance between the inner surface 40 of the covering member 4 and the peripheral surface 10 of the cylinder chamber 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、例えば、冷凍機における冷媒流体の圧縮に用いられるスクリュー圧縮機に関する。   The present invention relates to a screw compressor used for compressing a refrigerant fluid in a refrigerator, for example.

従来のスクリュー圧縮機は、図２に示すように、ケーシング５１と、このケーシング５１内に形成されたシリンダ室５２ｂに配置されたスクリューロータ５２と、上記ケーシング５１に形成された溝に嵌め込まれた容量制御用のスライドバルブ５３とを備え、上記スクリューロータ５２にて流体を圧縮しつつ吐出側に送り出していた（特開２００１−２５４６９１号公報：特許文献１参照）。   As shown in FIG. 2, the conventional screw compressor is fitted in a casing 51, a screw rotor 52 disposed in a cylinder chamber 52 b formed in the casing 51, and a groove formed in the casing 51. A slide valve 53 for controlling the capacity is provided, and fluid is sent out to the discharge side while compressing the fluid by the screw rotor 52 (see Japanese Patent Application Laid-Open No. 2001-254691: Patent Document 1).

上記スライドバルブ５３と上記スクリューロータ５２の羽根５２ａとの接触を避けるために、上記スライドバルブ５３の内面５３ａは、上記シリンダ室５２ｂの周面５１ａよりも半径方向外側に配置している。   In order to avoid contact between the slide valve 53 and the blades 52a of the screw rotor 52, the inner surface 53a of the slide valve 53 is arranged on the radially outer side with respect to the peripheral surface 51a of the cylinder chamber 52b.

しかしながら、上記従来のスクリュー圧縮機では、上記スライドバルブ５３の内面５３ａと上記シリンダ室５２ｂの周面５１ａとの間に隙間ｄがあるため、この隙間ｄが上記圧縮流体の漏れ通路となって、スクリュー圧縮機の性能の低下をまねいていた。
特開２００１−２５４６９１号公報（図２） However, in the conventional screw compressor, since there is a gap d between the inner surface 53a of the slide valve 53 and the peripheral surface 51a of the cylinder chamber 52b, the gap d becomes a leakage passage for the compressed fluid, This caused a decrease in the performance of the screw compressor.
Japanese Patent Laying-Open No. 2001-254691 (FIG. 2)

そこで、この発明の課題は、スライドバルブの内面とケーシングのシリンダ室の周面との間の漏れ通路をなくして、性能の向上を図ることができるスクリュー圧縮機を提供することにある。   SUMMARY OF THE INVENTION An object of the present invention is to provide a screw compressor that can improve performance by eliminating a leakage passage between the inner surface of a slide valve and the peripheral surface of a cylinder chamber of a casing.

上記課題を解決するため、この発明のスクリュー圧縮機は、ケーシングと、このケーシングのシリンダ室に配置されたスクリューロータと、上記スクリューロータの外周面に沿って配置されたスライドバルブとを備えたスクリュー圧縮機において、
上記スライドバルブの内面には、上記スクリューロータの羽根よりも軟らかい被覆部材を設け、この被覆部材の内面は、上記シリンダ室の周面と同一かまたは上記シリンダ室の周面よりも内側にあることを特徴としている。 In order to solve the above-mentioned problems, a screw compressor according to the present invention includes a casing, a screw rotor disposed in a cylinder chamber of the casing, and a slide valve disposed along an outer peripheral surface of the screw rotor. In the compressor,
A cover member that is softer than the blades of the screw rotor is provided on the inner surface of the slide valve, and the inner surface of the cover member is the same as the peripheral surface of the cylinder chamber or on the inner side of the peripheral surface of the cylinder chamber. It is characterized by.

この発明のスクリュー圧縮機によれば、上記被覆部材の内面が、上記シリンダ室の周面と同一かまたは上記シリンダ室の周面よりも内側にあるので、上記被覆部材の内面と上記シリンダ室の周面との間の隙間が小さくなるか、あるいはなくなって、漏れ通路がなくなり、したがって、圧縮効率を向上することができる。また、上記被覆部材が、上記スクリューロータの羽根よりも軟らかいので、上記被覆部材が上記スクリューロータに接触した場合でも、上記被覆部材が上記スクリューロータによって削られるので、焼付き等の不具合を回避できる。   According to the screw compressor of the present invention, since the inner surface of the covering member is the same as the peripheral surface of the cylinder chamber or inside the peripheral surface of the cylinder chamber, the inner surface of the covering member and the cylinder chamber The clearance between the peripheral surface is reduced or eliminated, and the leakage passage is eliminated, so that the compression efficiency can be improved. Moreover, since the said covering member is softer than the blade | wing of the said screw rotor, even when the said covering member contacts the said screw rotor, since the said covering member is scraped by the said screw rotor, troubles, such as seizing, can be avoided. .

また、一実施形態のスクリュー圧縮機では、上記被覆部材の内面は、上記シリンダ室の周面と同一であり、かつ、上記被覆部材の内面は、上記スクリューロータの羽根で削られたものである。   Moreover, in the screw compressor of one embodiment, the inner surface of the covering member is the same as the peripheral surface of the cylinder chamber, and the inner surface of the covering member is scraped by the blades of the screw rotor. .

この一実施形態のスクリュー圧縮機によれば、上記被覆部材の内面が、上記スクリューロータの羽根で削られて、上記シリンダ室の周面と同一になるので、このスクリュー圧縮機の使用において、上記被覆部材４と上記スクリューロータ２との間の隙間が自ずと最適になって、加工工程数を削減できると共に流体の漏れを低減できる。   According to the screw compressor of this embodiment, the inner surface of the covering member is scraped by the blades of the screw rotor and becomes the same as the peripheral surface of the cylinder chamber. The gap between the covering member 4 and the screw rotor 2 is naturally optimized, so that the number of processing steps can be reduced and fluid leakage can be reduced.

この発明のスクリュー圧縮機によれば、上記スクリューロータの羽根よりも軟らかい上記被覆部材の内面が、上記シリンダ室の周面と同一かまたは上記シリンダ室の周面よりも内側にあるので、圧縮効率を向上でき、かつ、スクリューロータの羽根の損傷や焼き付きを防止できる。   According to the screw compressor of the present invention, the inner surface of the covering member, which is softer than the blades of the screw rotor, is the same as the inner surface of the cylinder chamber or on the inner side of the peripheral surface of the cylinder chamber. Can be improved, and damage and seizure of the blades of the screw rotor can be prevented.

また、一実施形態のスクリュー圧縮機によれば、上記被覆部材の内面が、上記スクリューロータの羽根で削られて、上記シリンダ室の周面と同一になるので、このスクリュー圧縮機の使用において、上記被覆部材４と上記スクリューロータ２との間の隙間が自ずと最適になって、加工工程数を削減できると共に流体の漏れを低減できる。   Further, according to the screw compressor of one embodiment, the inner surface of the covering member is scraped by the blades of the screw rotor and becomes the same as the peripheral surface of the cylinder chamber. The gap between the covering member 4 and the screw rotor 2 is naturally optimized, so that the number of processing steps can be reduced and fluid leakage can be reduced.

以下、この発明を図示の実施の形態により詳細に説明する。   Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

図１は、本発明のスクリュー圧縮機の一実施形態である軸心方向からみた簡略断面図を示している。このスクリュー圧縮機は、ケーシング１と、このケーシング１のシリンダ室１２に配置されたスクリューロータ２と、上記ケーシング１の内部でかつ上記スクリューロータ２の外周面２０に沿って配置されたスライドバルブ３とを備える。   FIG. 1: has shown the simplified cross section seen from the axial center direction which is one Embodiment of the screw compressor of this invention. The screw compressor includes a casing 1, a screw rotor 2 disposed in a cylinder chamber 12 of the casing 1, and a slide valve 3 disposed inside the casing 1 and along the outer peripheral surface 20 of the screw rotor 2. With.

上記スクリューロータ２は、複数の螺旋状の羽根２１を有し、隣り合う上記羽根２１，２１の間に、図示しないスクリュー溝が形成される。なお、図１では、上記羽根２１を簡略化して描いており、上記スクリューロータ２の外周面２０とは、上記羽根２１の外面をいう。   The screw rotor 2 has a plurality of spiral blades 21, and a screw groove (not shown) is formed between the adjacent blades 21 and 21. In FIG. 1, the blade 21 is illustrated in a simplified manner, and the outer peripheral surface 20 of the screw rotor 2 refers to the outer surface of the blade 21.

上記スクリュー溝には、上記スクリューロータ２の径方向に上記スクリューロータ２を挟むように配置された図示しない一対のゲートロータ歯部が噛み合っている。   A pair of gate rotor teeth (not shown) arranged so as to sandwich the screw rotor 2 in the radial direction of the screw rotor 2 mesh with the screw groove.

上記スクリューロータ２は、図示しないモータに連結され、このモータの駆動により、上記スクリューロータ２が、軸心廻りに回転すると共に、上記ゲートロータが、上記軸心に垂直な軸心廻りに回転する。   The screw rotor 2 is connected to a motor (not shown). When the motor is driven, the screw rotor 2 rotates about the axis and the gate rotor rotates about an axis perpendicular to the axis. .

上記スクリューロータ２の回転により、上記スクリューロータ２の一端側から吸込まれた低圧の流体（冷媒ガス）は、上記スクリュー溝に沿って圧縮されつつ上記スクリューロータ２の他端側へ送られて吐出される。   The low-pressure fluid (refrigerant gas) sucked from one end side of the screw rotor 2 by the rotation of the screw rotor 2 is sent to the other end side of the screw rotor 2 while being compressed along the screw groove. Is done.

上記スライドバルブ３は、上記シリンダ室１２の周面１０に設けられた軸心方向の凹溝部１１に、軸心方向に移動自在に嵌合される。上記スライドバルブ３は、軸心方向に移動して、上記スクリューロータ２内の流体の容量を制御する。   The slide valve 3 is fitted into an axially recessed groove 11 provided on the peripheral surface 10 of the cylinder chamber 12 so as to be movable in the axial direction. The slide valve 3 moves in the axial direction to control the volume of fluid in the screw rotor 2.

上記スライドバルブ３の内面３０は、上記スクリューロータ２の羽根２１との接触を避けるために、上記シリンダ室１２の周面１０よりも内側に出ないように、上記シリンダ室１２の周面１０よりも半径方向外側に配置している。   In order to avoid contact with the blade 21 of the screw rotor 2, the inner surface 30 of the slide valve 3 is arranged from the peripheral surface 10 of the cylinder chamber 12 so as not to come out of the peripheral surface 10 of the cylinder chamber 12. Is also arranged radially outward.

上記スライドバルブ３の内面３０には、上記スクリューロータ２の羽根２１よりも軟らかい被覆部材４を設けている。具体的に述べると、上記スライドバルブ３の内面３０に、例えば、カーボンや二硫化モリブデン等の固体潤滑材や、フッ素樹脂等のコーティングを行なって、上記被覆部材４を形成する。なお、上記スクリューロータ２の羽根２１は、鋳鉄やステンレス鋼等からなる。   A covering member 4 that is softer than the blades 21 of the screw rotor 2 is provided on the inner surface 30 of the slide valve 3. More specifically, the covering member 4 is formed by coating the inner surface 30 of the slide valve 3 with, for example, a solid lubricant such as carbon or molybdenum disulfide, or a fluororesin. The blades 21 of the screw rotor 2 are made of cast iron, stainless steel, or the like.

上記被覆部材４の内面４０と上記シリンダ室１２の周面１０との間の隙間をなくすために、上記被覆部材４の内面４０は、上記シリンダ室１２の周面１０よりも内側に配置している。   In order to eliminate a gap between the inner surface 40 of the covering member 4 and the peripheral surface 10 of the cylinder chamber 12, the inner surface 40 of the covering member 4 is disposed inside the peripheral surface 10 of the cylinder chamber 12. Yes.

上記構成のスクリュー圧縮機によれば、上記シリンダ室１２の周面１０よりも内側に、上記被覆部材４のみが出っ張るように設定されているので、上記流体の漏れ通路がなくなって、性能の向上が図れる。また、上記被覆部材４が上記スクリューロータ２の羽根２１に接触しても、上記被覆部材４が上記スクリューロータ２の羽根２１によって削られるので、焼付きを防止すると共に、上記被覆部材４と上記スクリューロータ２との間の隙間が最適になって流体の漏れを低減できる。   According to the screw compressor having the above-described configuration, since only the covering member 4 protrudes inside the peripheral surface 10 of the cylinder chamber 12, there is no leakage path for the fluid, and the performance is improved. Can be planned. Even if the covering member 4 comes into contact with the blades 21 of the screw rotor 2, the covering member 4 is scraped by the blades 21 of the screw rotor 2, so that seizure is prevented and the covering member 4 and the above The gap between the screw rotor 2 is optimized and fluid leakage can be reduced.

なお、この発明は上述の実施形態に限定されず、この発明の要旨を逸脱しない範囲で設計変更可能である。例えば、図示しないが、上記被覆部材４の内面４０を、上記シリンダ室１２の周面１０と同一（面一）にしてもよく、このとき、上記被覆部材４の内面４０は、上記スクリューロータ２の羽根２１で削られたものである。   In addition, this invention is not limited to the above-mentioned embodiment, A design change is possible in the range which does not deviate from the summary of this invention. For example, although not shown, the inner surface 40 of the covering member 4 may be the same (same surface) as the peripheral surface 10 of the cylinder chamber 12, and at this time, the inner surface 40 of the covering member 4 may be the screw rotor 2. It was shaved with the blades 21.

本発明のスクリュー圧縮機の一実施形態を示す軸心方向からみた簡略断面図である。It is the simplified sectional view seen from the axial center direction which shows one embodiment of the screw compressor of the present invention. 従来のスクリュー圧縮機を示す軸心方向からみた簡略断面図である。It is a simplified sectional view seen from the axial direction showing a conventional screw compressor.

符号の説明Explanation of symbols

１ ケーシング
１０ 周面
１１ 凹溝部
１２ シリンダ室
２ スクリューロータ
２０ 外周面
２１ 羽根
３ スライドバルブ
３０ 内面
４ 被覆部材
４０ 内面

DESCRIPTION OF SYMBOLS 1 Casing 10 Peripheral surface 11 Concave groove part 12 Cylinder chamber 2 Screw rotor 20 Outer peripheral surface 21 Blade | wing 3 Slide valve 30 Inner surface 4 Covering member 40 Inner surface

Claims (2)

ケーシング（１）と、このケーシング（１）のシリンダ室（１２）に配置されたスクリューロータ（２）と、上記スクリューロータ（２）の外周面（２０）に沿って配置されたスライドバルブ（３）とを備えたスクリュー圧縮機において、
上記スライドバルブ（３）の内面（３０）には、上記スクリューロータ（２）の羽根（２１）よりも軟らかい被覆部材（４）を設け、この被覆部材（４）の内面（４０）は、上記シリンダ室（１２）の周面（１０）と同一かまたは上記シリンダ室（１２）の周面（１０）よりも内側にあることを特徴とするスクリュー圧縮機。 The casing (1), the screw rotor (2) disposed in the cylinder chamber (12) of the casing (1), and the slide valve (3) disposed along the outer peripheral surface (20) of the screw rotor (2). ) With a screw compressor,
The inner surface (30) of the slide valve (3) is provided with a covering member (4) that is softer than the blade (21) of the screw rotor (2), and the inner surface (40) of the covering member (4) A screw compressor characterized in that it is the same as the peripheral surface (10) of the cylinder chamber (12) or inside the peripheral surface (10) of the cylinder chamber (12). 請求項１に記載のスクリュー圧縮機において、
上記被覆部材（４）の内面（４０）は、上記シリンダ室（１２）の周面（１０）と同一であり、かつ、上記被覆部材（４）の内面（４０）は、上記スクリューロータ（２）の羽根（２１）で削られたものであることを特徴とするスクリュー圧縮機。
The screw compressor according to claim 1, wherein
The inner surface (40) of the covering member (4) is the same as the peripheral surface (10) of the cylinder chamber (12), and the inner surface (40) of the covering member (4) is the screw rotor (2). ) Blade compressor (21).
JP2003273303A 2003-07-11 2003-07-11 Screw compressor Expired - Fee Related JP4103709B2 (en)

Priority Applications (1)

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JP2003273303A JP4103709B2 (en) 2003-07-11 2003-07-11 Screw compressor

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Application Number Priority Date Filing Date Title
JP2003273303A JP4103709B2 (en) 2003-07-11 2003-07-11 Screw compressor

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JP2005030361A true JP2005030361A (en) 2005-02-03
JP4103709B2 JP4103709B2 (en) 2008-06-18

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1934472A1 (en) * 2005-09-07 2008-06-25 Carrier Corporation Slide valve
WO2009078178A1 (en) 2007-12-17 2009-06-25 Daikin Industries, Ltd. Screw compressor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1934472A1 (en) * 2005-09-07 2008-06-25 Carrier Corporation Slide valve
EP1934472A4 (en) * 2005-09-07 2012-04-11 Carrier Corp Slide valve
WO2009078178A1 (en) 2007-12-17 2009-06-25 Daikin Industries, Ltd. Screw compressor
US20100260620A1 (en) * 2007-12-17 2010-10-14 Daikin Industries, Ltd. Screw compressor
CN101896725A (en) * 2007-12-17 2010-11-24 大金工业株式会社 Screw compressor
US8366405B2 (en) 2007-12-17 2013-02-05 Daikin Industries, Ltd. Screw compressor with capacity control slide valve
CN101896725B (en) * 2007-12-17 2013-07-10 大金工业株式会社 Screw compressor

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