JPH06280764A - Rotor for screw type pump - Google Patents
Rotor for screw type pumpInfo
- Publication number
- JPH06280764A JPH06280764A JP6551693A JP6551693A JPH06280764A JP H06280764 A JPH06280764 A JP H06280764A JP 6551693 A JP6551693 A JP 6551693A JP 6551693 A JP6551693 A JP 6551693A JP H06280764 A JPH06280764 A JP H06280764A
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- groove
- resin
- coating layer
- coated layer
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、エンジン用過給機等と
して用いられるねじ式ポンプのロータに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor of a screw pump used as an engine supercharger or the like.
【０００２】[0002]
【従来の技術】エンジン用過給機として用いるねじ式ポ
ンプは、図１に示す如く、ハウジング１に雄ロータ２1
と雌ロータ２2とを収納し、該各ロータ２1、２2の軸３
をハウジング１の開口端の蓋体４に装着した各ベアリン
グ５を通して蓋体４の外側のギアケース６内の突出さ
せ、エンジンに連結されるプーリ７とギアケース６内の
ギア列８とを介して各ロータ２1、２2を回転させ、ハウ
ジング１の端壁側の吸気ポート（図示せず）から蓋体４
側の送気ポート９にエアを圧縮して送気するように構成
されている。2. Description of the Related Art A screw type pump used as a supercharger for an engine has a housing 1 and a male rotor 2 1 as shown in FIG.
And the female rotor 2 2 are housed, and the shafts 3 of the rotors 2 1 and 2 2 are housed.
Through the bearings 5 mounted on the lid 4 at the open end of the housing 1 to project inside the gear case 6 outside the lid 4, and via the pulley 7 connected to the engine and the gear train 8 in the gear case 6. The rotors 2 1 and 2 2 are rotated to rotate from the intake port (not shown) on the end wall side of the housing 1 to the lid 4
It is configured to compress air to supply air to the side air supply port 9.
【０００３】従来、これらロータは、アルミニウム等の
金属で形成したロータ本体の端面を含む外表面に樹脂コ
ーティング層を形成して構成されており、この場合、樹
脂コーティング層のロータ本体に対する接着強度を高め
るため、ロータ本体にショットブラスト処理を施した
り、或いは特開昭５８−１０９１７２号公報に見られる
ように酸による腐食処理を施して、ロータ本体の外表面
を粗面に形成している。Conventionally, these rotors are formed by forming a resin coating layer on the outer surface including the end surface of the rotor body formed of metal such as aluminum. In this case, the adhesive strength of the resin coating layer to the rotor body is increased. In order to increase the height, the outer surface of the rotor main body is roughened by performing shot blasting treatment on the rotor main body or by corrosive treatment with acid as disclosed in JP-A-58-109172.
【０００４】[0004]
【発明が解決しようとする課題】ロータはエアの圧縮に
よって発生する熱を受けて高温下で高速回転されること
になり、ロータ本体の外表面を上記従来技術の如く粗面
化しても、ロータの置かれる過酷な条件下では樹脂コー
ティング層の接着強度が不足し、特にロータ本体の端面
の樹脂コーティング層が回転遠心力で剥離し易くなる。
本発明は、以上の点に鑑み、樹脂コーティング層の耐剥
離性を向上させたロータを提供することをその目的とし
ている。Since the rotor receives the heat generated by the compression of air and is rotated at a high speed at a high temperature, even if the outer surface of the rotor body is roughened as in the prior art described above, the rotor does not rotate. The adhesive strength of the resin coating layer is insufficient under severe conditions where the resin is placed, and the resin coating layer on the end surface of the rotor body is likely to peel off due to the centrifugal force of rotation.
In view of the above points, the present invention has an object to provide a rotor in which the peeling resistance of the resin coating layer is improved.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成すべく、
本発明は、ねじ式ポンプのロータであって、ロータ本体
の端面を含む外表面に樹脂コーティング層を形成して成
るものにおいて、ロータ本体の端面に周方向にのびる溝
を該溝の径方向外側の溝壁面とロータ軸線に直交する面
との成す径方向外側の角度が９０゜以下になるように形
成し、樹脂コーティング層を該溝に樹脂が充填されるよ
うに形成したことを特徴とする。[Means for Solving the Problems] In order to achieve the above object,
The present invention relates to a rotor of a screw type pump, wherein a resin coating layer is formed on an outer surface including an end surface of a rotor body, wherein a groove extending in a circumferential direction is formed on an end surface of the rotor body, and the groove is radially outward of the groove. Is formed such that the angle formed on the outer side in the radial direction between the groove wall surface and the surface orthogonal to the rotor axis is 90 ° or less, and the resin coating layer is formed so that the groove is filled with resin. .
【０００６】[0006]
【作用】樹脂コーティング層の内面にロータ本体の端面
の溝に係合する凸部が形成され、樹脂コーティング層に
回転遠心力が作用すると径方向外側の溝壁面に案内され
て凸部が溝に食い込むようになり、回転遠心力に対する
樹脂コーティング層の耐剥離性が向上する。上記溝はロ
ータ本体の端面に径方向に間隔を存して多重に形成する
ことが望まれるが、この場合、溝を同心円状に複数形成
するよりも渦巻状に形成した方が加工が容易になる。ま
た、ロータ本体のねじ状歯部の外表面に相手方ロータの
歯部に対する相対すべり方向と略直角方向にのびる溝を
形成し、樹脂コーティング層を該溝に樹脂が充填される
ように形成すれば、各ロータの歯部同士の相対的すべり
接触に対する樹脂コーティング層の耐剥離性も向上でき
る。Function: A convex portion that engages with the groove on the end face of the rotor body is formed on the inner surface of the resin coating layer, and when a rotational centrifugal force acts on the resin coating layer, the convex portion is guided to the groove wall surface on the outer side in the radial direction and forms a groove. It comes to bite, and the peeling resistance of the resin coating layer against the rotational centrifugal force is improved. It is desired that the grooves be formed in multiple layers on the end surface of the rotor body with a space in the radial direction, but in this case, it is easier to process the spiral groove rather than forming a plurality of concentric grooves. Become. Further, by forming a groove on the outer surface of the threaded tooth portion of the rotor main body in a direction substantially perpendicular to the relative slip direction with respect to the tooth portion of the mating rotor, and forming a resin coating layer so that the groove is filled with resin. Also, the peel resistance of the resin coating layer against the relative sliding contact between the tooth portions of each rotor can be improved.
【０００７】[0007]
【実施例】図１に示すねじ式ポンプの雄ロータ２1に本
発明を適用した実施例について説明する。該ロータ２1
は、図２（ａ）（ｂ）に示す如く、アルミニウム製のロ
ータ本体２０の外表面にそのねじ状歯部２１から端面２
２に亘って耐熱エポキシ樹脂等の樹脂コーティング層２
３を形成して構成されている。EXAMPLE applying the present invention to the male rotor 2 first screw pump shown in FIG. 1 will be described. The rotor 2 1
As shown in FIGS. 2 (a) and 2 (b), the outer surface of the rotor body 20 made of aluminum is attached to the end surface 2 from the threaded tooth portion 21 thereof.
Resin coating layer 2 such as heat resistant epoxy resin over 2
3 is formed.
【０００８】ロータ本体２０の端面２２には、図３
（ａ）に示す如く、渦巻状の溝２４が形成されている。
該溝２４は、図３（ｂ）に示す如く、径方向外側の溝壁
面２４ａとロータ軸線に直交する面Ｐとの成す径方向外
側の角度θが９０°以下になるような断面鋸歯状に形成
されており、該溝２４に樹脂が充填されて、樹脂コーテ
ィング層２３の内面に溝２４に係合する凸部２３ａが形
成されるようにした。本実施例で上記角度θは鋭角にな
っており、樹脂コーティング層２３に回転遠心力が作用
すると、径方向外側の溝壁面２４ａに案内されて前記凸
部２３ａが溝２４に食い込むようになる。尚、θが９０
°であっても、樹脂コーティング層２３に作用する回転
遠心力は凸部２３ａを介して径方向外側の溝壁面２４ａ
で受けられ、樹脂コーティング層２３の耐剥離性は端面
２２を単に粗面とするものに比し大幅に向上する。As shown in FIG.
As shown in (a), a spiral groove 24 is formed.
As shown in FIG. 3B, the groove 24 has a saw-toothed cross-section so that the angle θ on the outer side in the radial direction formed by the groove wall surface 24a on the outer side in the radial direction and the plane P orthogonal to the rotor axis is 90 ° or less. The groove 24 is formed, and the groove 24 is filled with resin so that a convex portion 23 a that engages with the groove 24 is formed on the inner surface of the resin coating layer 23. In the present embodiment, the angle θ is an acute angle, and when a rotational centrifugal force acts on the resin coating layer 23, the convex portion 23a bites into the groove 24 by being guided by the groove wall surface 24a on the radially outer side. Note that θ is 90
Even if the rotation angle is 0 °, the rotational centrifugal force acting on the resin coating layer 23 passes through the convex portion 23a and the groove wall surface 24a on the radially outer side.
Therefore, the peeling resistance of the resin coating layer 23 is significantly improved as compared with the case where the end surface 22 is simply a rough surface.
【０００９】溝２４の加工は、図４に示す如く、モータ
３０によりボールねじ３１を介してロータ軸線方向に移
動される摺動台３２上にモータ３３によりボールねじ３
４を介してロータ径方向に移動される刃物台３５を設
け、該刃物台３５にロータ本体２０の端面に切り込まれ
る刃具３６を取付けて成る加工装置を用いて行うもの
で、溝２４を上記の如く渦巻状とすれば、ロータ本体２
０をスピンドル３７により回転させつつ刃物台３５を径
方向一定速度で連続移動させることにより、溝２４を容
易に形成できる。As shown in FIG. 4, the groove 24 is machined by the motor 33 on the sliding base 32 which is moved in the rotor axial direction by the motor 30 via the ball screw 31.
4 is provided with a tool rest 35 that is moved in the radial direction of the rotor, and a tool 36 that is cut into the end surface of the rotor body 20 is attached to the tool rest 35. If it has a spiral shape as shown in FIG.
The groove 24 can be easily formed by continuously moving the tool rest 35 at a constant radial velocity while rotating 0 by the spindle 37.
【００１０】また、本実施例では、ロータ本体２０のね
じ状歯部２１の外表面に、図５に示す如く、相手方ロー
タの歯部に対する相対すべり方向と略直角方向にのびる
溝２５を形成し、樹脂コーティング層２３をこの溝２５
に樹脂が充填されるように形成して、雄雌両ロータの歯
部同士の相対的すべり接触に対する樹脂コーティング層
２３の耐剥離性を向上し得るようにした。この溝２５
は、図６に示す如く、ロータ本体２０のねじ状歯部２１
の歯面加工を＃８０〜１００程度の粗い砥粒を電着した
粗粒砥石４０を用いて行うことで容易に形成できる。In this embodiment, as shown in FIG. 5, the outer surface of the threaded tooth portion 21 of the rotor main body 20 is provided with a groove 25 extending in a direction substantially perpendicular to the relative slip direction with respect to the tooth portion of the mating rotor. , The resin coating layer 23 in this groove 25
The resin coating layer 23 is formed so as to be filled with resin so that the peeling resistance of the resin coating layer 23 against relative sliding contact between the teeth of the male and female rotors can be improved. This groove 25
Is a threaded tooth portion 21 of the rotor body 20 as shown in FIG.
The tooth surface processing can be easily performed by using the coarse-grained grindstone 40 on which coarse abrasive grains of about # 80 to 100 are electrodeposited.
【００１１】尚、上記実施例では、ロータ本体２０の端
面に形成する溝２４を断面鋸歯状としたが、上記角度θ
を９０°以下とする限り断面形状は平行四辺形や台形等
であっても良い。また、本発明は雄ロータ２1だけでな
く雌ロータ２2にも当然適用できる。In the above embodiment, the groove 24 formed on the end face of the rotor body 20 has a sawtooth cross section, but the angle θ
The cross-sectional shape may be a parallelogram, a trapezoid, or the like as long as the angle is 90 ° or less. Further, the present invention can naturally be applied not only to the male rotor 2 1 but also to the female rotor 2 2 .
【００１２】[0012]
【発明の効果】以上の説明から明らかなように、請求項
１の発明によれば、回転遠心力に対する樹脂コーティン
グ層の耐剥離性を向上でき、更に、請求項２の発明によ
れば、ロータ本体の端面に溝を多重に且つ容易に形成で
きるため、樹脂コーティング層の耐剥離性を低コストで
一層向上でき、また、請求項３の発明によれば、ロータ
の歯部同士の相対的すべり接触に対する樹脂コーティン
グ層の耐剥離性も向上できる。As is apparent from the above description, according to the invention of claim 1, the peeling resistance of the resin coating layer against the rotational centrifugal force can be improved, and according to the invention of claim 2, the rotor is improved. Since multiple grooves can be easily formed on the end surface of the main body, the peeling resistance of the resin coating layer can be further improved at low cost, and according to the invention of claim 3, relative slippage between the tooth portions of the rotor is achieved. The peel resistance of the resin coating layer against contact can also be improved.
【図１】 （ａ）ねじ式ポンプの縦断面図、（ｂ）図１
（ａ）のＡ−Ａ線断面図FIG. 1 (a) is a vertical sectional view of a screw type pump, and FIG.
(A) AA sectional view taken on the line
【図２】 （ａ）ロータの縦断面図、（ｂ）ロータの横
断面図2A is a vertical cross-sectional view of a rotor, and FIG. 2B is a horizontal cross-sectional view of a rotor.
【図３】 （ａ）本発明に係るロータ本体の一例の端面
図、（ｂ）図３（ａ）のＢ−Ｂ線で截断した樹脂コーテ
ィング層形成後の拡大断面図3A is an end view of an example of a rotor body according to the present invention, and FIG. 3B is an enlarged cross-sectional view after forming a resin coating layer cut along the line BB of FIG. 3A.
【図４】 ロータ本体の端面に対する溝加工装置の平面
図FIG. 4 is a plan view of a groove processing device for the end surface of the rotor body.
【図５】 本発明ロータの一例の歯部の拡大横断面図FIG. 5 is an enlarged cross-sectional view of a tooth portion of an example of the rotor of the present invention.
【図６】 歯部に対する溝の加工工程を示す斜視図FIG. 6 is a perspective view showing a process of forming a groove on a tooth portion.
２1、２2 ロータ ２０ ロータ本体 ２１ 歯部 ２２ 端面 ２３ 樹脂コーティング層 ２４ 端面の溝 ２４ａ 径方向外側の溝壁面 ２５ 歯部外表面の
溝2 1 2 2 Rotor 20 Rotor body 21 Tooth portion 22 End face 23 Resin coating layer 24 End face groove 24a Radially outer groove wall surface 25 Groove on outer surface of tooth part
Claims (3)
本体の端面を含む外表面に樹脂コーティング層を形成し
て成るものにおいて、ロータ本体の端面に周方向にのび
る溝を該溝の径方向外側の溝壁面とロータ軸線に直交す
る面との成す径方向外側の角度が９０゜以下になるよう
に形成し、樹脂コーティング層を該溝に樹脂が充填され
るように形成したことを特徴とするねじ式ポンプのロー
タ。1. A screw-type pump rotor, comprising a resin coating layer formed on an outer surface including an end surface of a rotor body, wherein a groove extending in a circumferential direction is formed on an end surface of the rotor body in a radial direction of the groove. The radial outer angle formed by the outer wall surface of the groove and the surface orthogonal to the rotor axis is 90 ° or less, and the resin coating layer is formed so that the groove is filled with resin. Screw type pump rotor.
成したことを特徴とする請求項１に記載のねじ式ポンプ
のロータ。2. The rotor of a screw pump according to claim 1, wherein the groove is formed in a spiral shape on the end surface of the rotor body.
方ロータの歯部に対する相対すべり方向と略直角方向に
のびる溝を形成し、樹脂コーティング層を該溝に樹脂が
充填されるように形成したことを特徴とする請求項１又
は２に記載のねじ式ポンプのロータ。3. A groove is formed on the outer surface of the threaded tooth portion of the rotor body, the groove extending in a direction substantially perpendicular to the relative slip direction with respect to the tooth portion of the counterpart rotor, and the resin coating layer is filled with resin. The rotor of the screw pump according to claim 1, wherein the rotor is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6551693A JPH06280764A (en) | 1993-03-24 | 1993-03-24 | Rotor for screw type pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6551693A JPH06280764A (en) | 1993-03-24 | 1993-03-24 | Rotor for screw type pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06280764A true JPH06280764A (en) | 1994-10-04 |
Family
ID=13289278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6551693A Pending JPH06280764A (en) | 1993-03-24 | 1993-03-24 | Rotor for screw type pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06280764A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004061310A1 (en) * | 2002-12-30 | 2004-07-22 | Carrier Corporation | Coated end wall of a compressor chamber and method of manufacture thereof |
| JP2007190661A (en) * | 2006-01-23 | 2007-08-02 | Denso Corp | Rotor manufacturing method and manufacturing apparatus of screw compressor |
| US20080080996A1 (en) * | 2006-09-28 | 2008-04-03 | Kabushiki Kaisha Kobe Seiko Sho | Screw rotor |
| US8079144B2 (en) | 2002-12-30 | 2011-12-20 | Carrier Corporation | Method of manufacture, remanufacture, or repair of a compressor |
| JP2019007433A (en) * | 2017-06-26 | 2019-01-17 | 日立ジョンソンコントロールズ空調株式会社 | Screw compressor |
-
1993
- 1993-03-24 JP JP6551693A patent/JPH06280764A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004061310A1 (en) * | 2002-12-30 | 2004-07-22 | Carrier Corporation | Coated end wall of a compressor chamber and method of manufacture thereof |
| US7318275B2 (en) | 2002-12-30 | 2008-01-15 | Carrier Corporation | Method of remanufacturing a compressor |
| CN100390418C (en) * | 2002-12-30 | 2008-05-28 | 开利公司 | Coated end wall of a compressor chamber and method of manufacture thereof |
| US8079144B2 (en) | 2002-12-30 | 2011-12-20 | Carrier Corporation | Method of manufacture, remanufacture, or repair of a compressor |
| JP2007190661A (en) * | 2006-01-23 | 2007-08-02 | Denso Corp | Rotor manufacturing method and manufacturing apparatus of screw compressor |
| US20080080996A1 (en) * | 2006-09-28 | 2008-04-03 | Kabushiki Kaisha Kobe Seiko Sho | Screw rotor |
| US8308463B2 (en) * | 2006-09-28 | 2012-11-13 | Kabushiki Kaisha Kobe Seiko Sho | Resin screw rotor molded to a metallic shaft |
| JP2019007433A (en) * | 2017-06-26 | 2019-01-17 | 日立ジョンソンコントロールズ空調株式会社 | Screw compressor |
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