CN204299941U - The linkage structure of a kind of centrifugal pump impeller and pump shaft - Google Patents

Abstract

The utility model discloses a connection structure between the impeller and the pump shaft of a centrifugal pump, which comprises a volute, an impeller and a motor shaft. A friction disc and a sliding bearing in the step hole at the lower end of the inlet cover are sheathed on the step shaft at the upper end of the impeller shaft. The end faces are opposite, and the material of the friction disc is a self-lubricating composite material. The utility model has the advantages of high efficiency and long service life under the condition of high pressure and high speed.

Description

A connection structure between a centrifugal pump impeller and a pump shaft

Technical field:

The utility model relates to a pump, in particular to a connection structure between a centrifugal pump impeller and a pump shaft.

Background technique:

The axial force generated by the rotation of the impeller of the centrifugal pump has an impact on the service life and efficiency of the pump. The existing technical solutions to this problem include balance holes, balance ribs, balance discs, and floating impellers with balance holes. Although this technical scheme has certain overcoming to axial force, all there is the place that has deficiency, especially for the life-span influence of high-pressure, high-speed centrifugal pump, axial force is main factor. Therefore, it is more important to solve the axial force of high-pressure and high-speed centrifugal pumps.

Invention content:

The purpose of the utility model is to provide a centrifugal pump impeller and pump shaft connection structure with high efficiency and long service life under high pressure and high speed conditions.

The technical solution of the utility model is a connection structure between the impeller and the pump shaft of a centrifugal pump, including a volute, an impeller and a motor shaft, characterized in that a friction disc and a step at the lower end of the inlet cover are sleeved on the step shaft at the upper end of the impeller shaft The lower end faces of the sliding bearings in the holes are opposite, and the material of the friction disc is a self-lubricating composite material.

Compared with the prior art, the utility model has the advantages of high efficiency and long service life under the condition of high pressure and high speed.

Description of drawings:

Figure 1 is a schematic structural view of the utility model.

Detailed ways:

In order to solve the defect that the existing impeller and the pump shaft adopt a fixed connection structure, the ability to resist axial force is small, the utility model adopts the following technical scheme, a friction disc 3 is sleeved on the stepped shaft at the upper end of the impeller 2 shaft, and a friction disc 3 is placed on the inlet cover 5 A sliding bearing 4 is arranged in the stepped hole at the lower end, and the upper end surface of the friction disc is in contact with the lower end surface of the sliding bearing. The volute 1 and the motor shaft in it remain unchanged. The friction disc is made of self-lubricating composite material.

The working principle of the utility model is that the axial force generated by the rotation of the impeller makes the impeller move in the direction of the axial force. At this time, the friction disc on the impeller shaft and the sliding bearing form a pair of friction pairs, and the sliding bearing bears the axial force of the impeller. , Because the sliding bearing has strong resistance to axial force and high reliability, it improves the service life under high pressure and high speed conditions.

Claims (1)

1. A connection structure between the impeller and the pump shaft of a centrifugal pump, including a volute, an impeller and a motor shaft, characterized in that: a friction disc is sleeved on the stepped shaft at the upper end of the impeller shaft and a sliding bearing in the stepped hole at the lower end of the inlet cover The lower end faces are opposite, and the material of the friction disc is a self-lubricating composite material.