JPS5844286A

JPS5844286A - Pump

Info

Publication number: JPS5844286A
Application number: JP14078781A
Authority: JP
Inventors: Akira Washida; 鷲田　彰
Original assignee: Individual
Current assignee: Individual
Priority date: 1981-09-07
Filing date: 1981-09-07
Publication date: 1983-03-15

Abstract

PURPOSE:To obtain a pump, which has good slidability, small return loss due to leakage, and high discharge pressure, by manufacturing the outer periphery of a rotor using material that is composed mainly of a high molecular material and by manufacturing the inside using a material whose specific gravity is greater than that of the high molecular material that is the major material of the outer periphery. CONSTITUTION:An outer periphery 8 of a roller 7 is made of a high molecular material such as rubber, nylon resin, or ethylene tetra fluoride polymer, while an inside 9 of this roller 8 is made of a material whose specific gravity is greater than that of the outer periphery 8 that is made mainly of a high molecular material. For example, a bar body 10 inside the roller 7 is made of stainless steel. Since, as described the above, the specific gravity of the inside of the roller 7 is greater than that of high molecular material, that is major material of the outer periphery, the roller 7 is pressed strongly to the inside surface of a casing 1 owing to a large centrifugal force. As a result, the return loss due to leakage can be reduced while the discharging pressure can be increased. Since the periphery of roller 7 is made of a high molecular material, it touches the inside surface of the casing 1 elastically, thus improving its slidability.

Description

【発明の詳細な説明】本発明は、円筒状のケーシング内に回転するローターを
偏心して内蔵し、このロ−ターの外周に設けた放射状の
複数個の溝内にそれぞれローラーをはめたものにおいて
、これらのローラーの外周は高分子物質を主体とする材
料にて製し、内部はこの主成分たる高分子物質よりも比
重の大きい材料にしたことを特徴とするポンプに関する
もので、その目的とするところは、摺動性がよく、しか
も漏り戻り損失の少ない、吐出圧力の高いポンプを得る
にある。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a cylindrical casing in which a rotating rotor is built eccentrically, and rollers are fitted into a plurality of radial grooves provided on the outer periphery of the rotor. , relates to a pump characterized in that the outer periphery of these rollers is made of a material mainly composed of a polymeric substance, and the inside is made of a material with a specific gravity greater than that of the polymeric substance which is the main component, and the purpose is The purpose is to obtain a pump with good sliding properties, low leakage loss, and high discharge pressure.

本発明ポンプを例示図面により説明する。The pump of the present invention will be explained with reference to illustrative drawings.

（１）は円筒状のケーシングである。このケーシングは
外周に巻き出し方向の互いに異なる通口（２）及び（３
）を有する。このケーシングはローター（４）を偏心さ
せて内蔵する。ローター（４）はシャフト（５）によっ
て回転させられる。(1) is a cylindrical casing. This casing has different openings (2) and (3) in the unwinding direction on the outer periphery.
). This casing houses an eccentric rotor (4). The rotor (4) is rotated by a shaft (5).

このローターの外周には放射状の複数個の溝（６）を設
ける。これらの溝内にはローラー（７）をはめる。ロー
ター（４）の回転にともない、ローラー（７）は自転し
ながらケーシングの内周に接して公転する。ローターが
矢印（Ａ）方向へ回転する場合には、ローラーは矢印（
Ｂ）方向へ自転する。ローラー（７）の外周（８）は高
分子物質製である。たとえばゴム製またはナイロン樹脂
製あるいは四ふっ化エチレン樹脂製である。これらの高
分子物質には適宜の充填剤を充填してもよい。A plurality of radial grooves (6) are provided on the outer periphery of this rotor. Rollers (7) are fitted into these grooves. As the rotor (4) rotates, the roller (7) revolves around the inner circumference of the casing while rotating. When the rotor rotates in the direction of arrow (A), the roller rotates in the direction of arrow (A).
B) rotates in direction. The outer periphery (8) of the roller (7) is made of polymeric material. For example, it is made of rubber, nylon resin, or tetrafluoroethylene resin. These polymeric substances may be filled with an appropriate filler.

このローラー（８）の内部（９）は高分子物質製の外周
（８）の主成分よりも比重の大きいものにしてある。た
とえばローラー内部の棒体（１０）をステンレス鋼製と
する。The interior (9) of this roller (8) has a higher specific gravity than the main component of the outer periphery (8) made of a polymeric material. For example, the rod (10) inside the roller is made of stainless steel.

このように構成し、ローター（４）を矢印（Ａ）方向に
回転させると、流体は通口（２）からケーシング（１）
内に吸入され、圧力を高められて通口（３）から排出さ
れる。With this configuration, when the rotor (4) is rotated in the direction of the arrow (A), the fluid flows from the opening (2) to the casing (1).
The gas is drawn into the interior, the pressure is increased, and it is discharged through the port (3).

この種のポンプにおいては、ローラー（７）の前後の漏
り戻り損失が多いと効率が低下し、吐出圧力も低下する
。しかるに本発明ポンプにおいては、ローラー（７）の
内部は、その外周の高分子物質の主成分よりも比重が大
きいので、ローラー（７）は大きい遠心力によって、ケ
ーシング（１）の内周に強く圧接させられる。従って、
上述の漏り戻り損失を少なくし得、吐出圧力も高めるこ
とができるのである。また、ローラー（７）の外周は高
分子物質製であるから、ケーシング（１）の内周に弾性
的に接し、摺動性のよいものとすることができる。また
、ローラー内部に剛性の高い棒体を設けた場合には、ロ
ーラー（７）が通口（３）及び（４）とケーシングの内
周との会合部において、このローラーが屈曲するのを防
ぎ、騒音や振動を少なくし、ローラーの異常磨耗やむし
れ、あるいは疲労破壊を防ぐことができる。In this type of pump, if there is a large leakage loss before and after the roller (7), the efficiency will decrease and the discharge pressure will also decrease. However, in the pump of the present invention, the inside of the roller (7) has a higher specific gravity than the main component of the polymer substance on the outer periphery, so the roller (7) is strongly attached to the inner periphery of the casing (1) due to the large centrifugal force. I am forced into pressure contact. Therefore,
The above-mentioned leakage loss can be reduced and the discharge pressure can also be increased. Moreover, since the outer periphery of the roller (7) is made of a polymeric substance, it comes into elastic contact with the inner periphery of the casing (1) and can have good sliding properties. Furthermore, if a highly rigid rod is provided inside the roller, the roller (7) can be prevented from bending at the meeting point between the ports (3) and (4) and the inner periphery of the casing. , noise and vibration can be reduced, and abnormal wear and tear of the rollers, as well as fatigue failure, can be prevented.

[Brief explanation of drawings]

図面は本発明ポンプの実施例を示す。第１図は横断面図
で、第２図は第１図におけるＹ２−Ｙ２投影を示す。（１）・・・ケーシング。（２）、（３）・・・通口。（４）・・・ローター。（５）・・・シャフト。（６）・・・溝。（７）・・・ローラー。（８）・・・
外周。（９）・・・内部。（１０）・・・棒体。特許出願人　鷲田　彰The drawing shows an embodiment of the pump according to the invention. FIG. 1 is a cross-sectional view, and FIG. 2 shows a Y2-Y2 projection in FIG. (1)...Casing. (2), (3)...door. (4) Rotor. (5)...Shaft. (6)...Groove. (7)...Roller. (8)...
outer circumference. (9)...Inside. (10)...rod. Patent applicant Akira Washida

Claims

[Claims]

A rotor that rotates eccentrically is housed in a cylindrical casing, and rollers are inserted into multiple radial grooves provided on the outer periphery of the rotor, and the outer periphery of these rollers is mainly made of polymeric material. A pump characterized in that it is made of a material that has a specific gravity greater than that of the polymeric substance that is its main component.