JP2021134739A5

JP2021134739A5 -

Info

Publication number: JP2021134739A5
Application number: JP2020032580A
Authority: JP
Filing date: 2020-02-28
Publication date: 2021-12-23
Anticipated expiration: 2040-02-28

Description

本発明の目的は、ポンプ効率が優れる多段渦巻きポンプ装置を提供することにある。
また、本発明の他の目的は、部品間の水密性を向上させることで、ポンプ効率が優れる多段渦巻きポンプ装置を提供することにある。 An object of the present invention is to provide a multi-stage centrifugal pump device having excellent pump efficiency.
Another object of the present invention is to improve the water-tightness between the components, it is to provide a multistage centrifugal pump apparatus pumping efficiency is excellent.

本発明の多段渦巻きポンプ装置は、電動機と、該電動機で回転駆動される羽根車と、該羽根車の外周を覆うように位置すると共に外郭でポンプ室を形成するケーシングと、を有し、前記羽根車の回転により渦巻きポンプ作用を行う多段渦巻きポンプ装置において、前記電動機は、前記ケーシングに対してポンプ室側とは反対側の背面側に位置し、前記羽根車部は、ガイドカバーと、第１の羽根車と、クロスオーバーリターンと、シャフトスペーサと、リターンガイドと、第２の羽根車と、を有し、前記クロスオーバーリターンは、リターンディフューザと、タンデムディフューザを備え、前記リターンディフューザと前記タンデムディフューザの間に開口部を有する。
また、本発明は、部品間の水密性を向上させる手段として、リターンガイドの背面側に、ケーシングの静翼に設けられた凹部に嵌合する複数の凸部を設けた。 The multi-stage centrifugal pump device of the present invention has an electric motor, an impeller that is rotationally driven by the electric motor, and a casing that is located so as to cover the outer periphery of the impeller and forms a pump chamber in the outer shell. In a multi-stage centrifugal pump device that performs a centrifugal pump operation by rotating an impeller, the electric motor is located on the back side opposite to the pump chamber side with respect to the casing, and the impeller portion is a guide cover and a first. It has one impeller, a crossover return, a shaft spacer, a return guide, and a second impeller, the crossover return comprising a return diffuser and a tandem diffuser, the return diffuser and said. It has an opening between the tandem diffusers.
Further, in the present invention, as a means for improving the watertightness between the parts, a plurality of convex portions fitted to the concave portions provided on the stationary blades of the casing are provided on the back surface side of the return guide.

本発明によれば、リターンディフューザとタンデムディフューザを備えたクロスオーバーリターンを搭載することで、周方向に均一な流れを形成でき、ポンプ効率に優れる多段渦巻きポンプ装置を提供することができる。According to the present invention, by mounting a crossover return including a return diffuser and a tandem diffuser, it is possible to provide a multi-stage centrifugal pump device capable of forming a uniform flow in the circumferential direction and having excellent pump efficiency.

また、本発明によれば、凸部と凹部を嵌合させることで、ラビリンス効果が生まれ水密性が向上することで、ポンプ効率に優れる多段渦巻きポンプ装置を提供することができる。
また、凸部と凹部を嵌合させることで、部品組立時の位置決めが容易になり組立作業性の向上も図ることができる。 Further, according to the present invention, it is possible to provide a multi-stage centrifugal pump device having excellent pump efficiency by creating a labyrinth effect and improving watertightness by fitting the convex portion and the concave portion.
Further, by fitting the convex portion and the concave portion, positioning at the time of assembling the parts becomes easy and the assembly workability can be improved.

Claims

The impeller has an electric motor, an impeller portion including an impeller that is rotationally driven by the motor, and a casing that is located so as to cover the outer periphery of the impeller portion and forms a pump chamber in the outer shell. In a multi-stage centrifugal pump device that performs centrifugal pumping by rotation
The motor is located on the back side of the casing opposite to the pump chamber side.
The impeller portion includes a guide cover, a first impeller, a crossover return, a shaft spacer, a return guide, and a second impeller.
The crossover return includes a return diffuser and a tandem diffuser.
A multi-stage centrifugal pump device characterized by having an opening between the return diffuser and the tandem diffuser.

In the multi-stage centrifugal pump device according to claim 1,
The shaft spacer is
A multi-stage centrifugal pump device characterized in that the rear end of the first impeller and the front end of the second impeller are in contact with each other.

In the multi-stage centrifugal pump device according to claim 1 or 2.
A multi-stage centrifugal pump device provided so as to communicate the opening of the crossover return and the opening of the return guide.

In the multi-stage centrifugal pump device according to any one of claims 1 to 3.
The casing has a stationary wing portion with recesses.
The return guide is a multi-stage centrifugal pump device characterized by having a convex portion fitted to the concave portion on the back surface side.