JPS5841634A - Manufacture of screw rotor - Google Patents

Abstract

PURPOSE:To manufacture a titled rotor having a cooling pipe which is capable of forcibly cooling a rotor tooth part, at a low cost, by laminating a tooth form thin plate having a hole whose size is different from each other in adjacent thin plates, by shifting its phase, inserting a pipe into the hole, and expanding it. CONSTITUTION:A hole 3 is made on a tooth form part of a press punching tooth form plate 1. The tooth form plate 1 having a large hole 3 and the tooth form plate 1 having a small hole are alternately laminated around a shaft part 2 by shifting the phase. Subsequently, a flexible annealed copper pipe 4 is inserted into the rotor tooth form part through-hole 3 constituted by combining in this way, the copper pipe inserted rotor is detained by clamping it with a jig, and hydraulic pressure is put onto the inside of the pipe 4, and it is expanded. As a result, in the place of the large hole 3, the pipe 4 is expanded and fitted in, therefore, each tooth form plate 1 is positioned and fixed by the pipe 4. Subsequently, only the tooth form part 1 of both ends is brazed or arc-welded to the shaft 2.

Description

【発明の詳細な説明】 本発明は、スクリュロータの歯部を強制冷却するための
冷却管を有するスクリュロータ製作方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a screw rotor having a cooling pipe for forcibly cooling the teeth of the screw rotor.

従来のスクリュロータは、鋳造１体構造のためロータ歯
部を強制通水できる構造を得ることは非常に困難であり
、採算上実施出来る見通しがなかった。スクリュ圧縮機
およびプロワは高性能、小形化が要望され益々高速回転
化の傾向にある。このため熱影響が強度上、性能上無視
できなく開発上の大きな問題であった。一方従来鋳物１
体ロータは製作が難しく、製作設備面より生産工程上の
隘路が大であった。このためロータの歯部をプレス抜き
板で積層することが考えられていたが、各板の接合方法
が難しく実用化されていない。Since the conventional screw rotor has a cast one-piece structure, it is very difficult to obtain a structure that allows water to flow through the rotor teeth forcibly, and there is no prospect of it being economically viable. Screw compressors and blowers are required to have higher performance and be more compact, and there is a trend towards higher rotation speeds. For this reason, thermal effects could not be ignored in terms of strength and performance, and were a major problem during development. On the other hand, conventional casting 1
The body rotor was difficult to manufacture, and the bottlenecks in the production process were greater than in terms of manufacturing equipment. For this reason, it has been considered to stack the teeth of the rotor using press-cut plates, but this method has not been put to practical use because the method for joining each plate is difficult.

本発明の目的はロータ歯部を強制冷却できる冷却管を有
するスクリュロータ安価に製作することにある。An object of the present invention is to inexpensively manufacture a screw rotor having cooling pipes that can forcibly cool the rotor teeth.

本発明は、穴を有し歯形形状をした薄板を多数位相をず
らして重ね合わせ、然る後、前記穴に管を挿入し、次に
管を膨張させることＫよって各薄板を互いに接合するこ
とを特徴とする。The present invention involves stacking a large number of tooth-shaped thin plates having holes in a phase-shifted manner, then inserting a tube into the hole, and then inflating the tube to join the thin plates to each other. It is characterized by

以下、本発明の一実施例を第１図〜第９図により説明す
る。第１図はスクリュロータの形状説明図。このような
形状を、第２図に示すプレス抜き歯形を第３図に示す如
く積み重ねて構成する。このプレス抜き歯形板１の歯形
部には第２図に示す如く穴３をあけ、この穴３の大きさ
を大小２通り製作し、それを第６図および第７図に示す
如く１枚毎に交互に積層するか、又は数枚毎に区分して
積層する。このように組合せ構成したロータの歯形部貫
通穴に第４図に示す如く、柔軟性のある焼鈍情調パイプ
４をそれぞれの穴３に差し込む。銅パイプ挿入済ロータ
を第５図に示す如く、治具で締付けて拘束し、液圧（流
体圧）を銅パイプ４の内面にかけると、当初第６図に示
す如く銅パイプ４はただ穴３に差し込まれた状態であっ
たものが、第７図に示す如く内圧により大きい穴の方の
所は銅パイプ４が広がり喰い込む。これにより箇々の歯
形板１は銅パイプ４で位置決めされ固定されると共に、
この銅パイプ４による接合により、第８図に示す如く、
シャフトの両端側より軸心を通した冷却水通水穴を設け
、ロータ歯形の両端のみを冷却水が積層部接続網パイプ
に入り易いよう通水ポケットを有する厚板構造とすれば
、シャフトの軸端の一方より通水することにより、冷却
水はポケット部に入りここから歯形部の銅パイプ内を通
り他端のシャフトに流れ、強制冷却をすることができる
。また第９図に示す如く歯形の通水ポケットを有する両
端をボルト締めにし取外しできるようにすれば、銅パイ
プｌ内を容易に清掃できる構造とすることも可能である
。An embodiment of the present invention will be described below with reference to FIGS. 1 to 9. FIG. 1 is an explanatory diagram of the shape of the screw rotor. Such a shape is constructed by stacking the press-cut tooth profiles shown in FIG. 2 as shown in FIG. 3. A hole 3 is made in the tooth profile of this pressed tooth profile plate 1 as shown in FIG. Laminate them alternately, or layer them in sections. As shown in FIG. 4, flexible annealing pipes 4 are inserted into the respective holes 3 of the toothed portions of the rotors thus constructed. When the rotor with the copper pipes inserted is tightened and restrained with a jig as shown in Fig. 5 and hydraulic pressure (fluid pressure) is applied to the inner surface of the copper pipes 4, the copper pipes 4 are initially just holes as shown in Fig. 6. However, as shown in FIG. 7, the copper pipe 4 expands into the larger hole due to internal pressure and bites into it. As a result, each tooth profile plate 1 is positioned and fixed by the copper pipe 4, and
By joining with this copper pipe 4, as shown in FIG.
If cooling water passage holes are provided from both ends of the shaft through the axis, and only both ends of the rotor tooth profile are made of a thick plate structure with water passage pockets so that the cooling water can easily enter the laminated section connection network pipe, the shaft By passing water from one end of the shaft, the cooling water enters the pocket and flows from there through the copper pipe of the toothed section to the shaft at the other end, allowing for forced cooling. Further, as shown in FIG. 9, if both ends having tooth-shaped water passage pockets are tightened with bolts so that they can be removed, the inside of the copper pipe 1 can be easily cleaned.

本実施例によれば、スクリュロータの強制冷却を可能と
し、安価な積層形ロータを製作することができる。According to this embodiment, the screw rotor can be forcedly cooled, and an inexpensive laminated rotor can be manufactured.

尚、シャフトと歯形部の接合は、両端のみをろう付やア
ーク溶接すれば良い。Note that the shaft and the toothed portion may be joined by brazing or arc welding only at both ends.

以上のように本発明によれば、スクリュロータの歯部の
冷却を通水により強制的に行なえる冷却管を歯部に設け
、しかも、製作が大変なロータ歯部をプレス抜き板を積
み重ねて構成する構造のスクリュロータを安価に製作で
きる効果がある。As described above, according to the present invention, cooling pipes are provided in the teeth that can be forcibly cooled by passing water through the teeth of the screw rotor, and the rotor teeth, which are difficult to manufacture, are formed by stacking press punched plates. This has the effect of making it possible to manufacture the screw rotor having the same structure at a low cost.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はスクリュロータの形状説明図、第２図は歯形部
所面、第３図はプレス抜きした歯形部を積み重ねロータ
形状とした説明図、第４図は歯形部に設けた通水穴に銅
パイプを挿入する説明図、第５図は挿入した銅パイプに
内圧を加えるためのロータ拘束および加圧設備説明図、
第６図および第７図は銅パイプ内圧加圧前後の説明図、
第８図は通水路を設けたロータの実施例の断面図、第９
図は取外し可能式ロータの要部断面図である。 １・・・ロータ歯形部、１ａ・・・大径通水穴を有する
歯形部、２・・・シャフト部、ＩＡ・・・通水ポケット
を有する歯形部、ＩＢ・・・取外し式歯形例、３・・・
通水貫通穴、４・・・冷却管、５〜１２・・・冷却管内
径加圧用拘束治具および加圧設備、５・・・両端保持板
、６・・・拘束シャフト、７・・・シャフト用締付ナツ
ト、８・・・パツキン、９・・・接手、ｉｏ・・・ゴム
ホースおよびパイプの連結管、１１・・・圧力針、１２
・・・空気抜用バルブ、Ｐ・・・加圧ポンプ。 代理人　弁理士　薄田利幸 ／−゛。 ｊ、“　　１ 、、、、ｌニパ　　・・ °１．− 第　１（２］ 第　４　図 第６図　　　　　　　　第７　図 第　δ　図 箇９　口 １８１−Fig. 1 is an explanatory diagram of the shape of the screw rotor, Fig. 2 is a view of the tooth profile, Fig. 3 is an explanatory diagram of the pressed tooth profile stacked up to form a rotor shape, and Fig. 4 is a water passage hole provided in the tooth profile. Figure 5 is an explanatory diagram of the rotor restraint and pressure equipment for applying internal pressure to the inserted copper pipe.
Figures 6 and 7 are explanatory diagrams before and after pressurizing the copper pipe,
FIG. 8 is a sectional view of an embodiment of a rotor provided with a water passage, and FIG.
The figure is a sectional view of a main part of a removable rotor. DESCRIPTION OF SYMBOLS 1...Rotor tooth profile part, 1a...Tooth profile part having a large diameter water passage hole, 2...Shaft part, IA...Tooth profile part having a water passage pocket, IB...Removable tooth profile example, 3...
Water passage through hole, 4... Cooling pipe, 5-12... Restriction jig and pressurizing equipment for pressurizing the inner diameter of the cooling pipe, 5... Both end holding plates, 6... Restriction shaft, 7... Tightening nut for shaft, 8...Packing, 9...Joint, io...Connecting tube for rubber hose and pipe, 11...Pressure needle, 12
...Air vent valve, P...pressure pump. Agent: Patent attorney Toshiyuki Usuda／−゛. j, "1,,,,l Nipa... °1.- 1st (2) Fig. 4 Fig. 6 Fig. 7 Fig. δ Fig. 9 Mouth 181-

Claims (1)

【特許請求の範囲】[Claims] 薄板を多数位相をずらして積層して、結合するスクリュ
ロータの製作方法において、各薄板に少なくとも１個の
穴を設け、薄板の穴の大きさを隣接する薄板同志間で異
なるものとなるように各薄板を積層し、次に穴に管を挿
入し、次に管内に圧力を加えて管を変形させて各薄板を
互いに結合することを特徴とするスクリュロータの製作
方法。A method for manufacturing a screw rotor in which a large number of thin plates are laminated with different phases and joined together, in which at least one hole is provided in each thin plate, and the size of the hole in the thin plates is different between adjacent thin plates. A method of manufacturing a screw rotor, which comprises laminating thin plates, inserting a tube into the hole, applying pressure inside the tube to deform the tube, and joining the thin plates to each other.