KR19990016000U - Rotary shaft of centrifugal pump - Google Patents

Abstract

The present invention is a gland packing (5) and gland (6) for supporting the rotating shaft (4) by inserting the casing (1) and the bearing housing (2) and the casing cover (3) constituting the pump body, and the bearing The rotating shaft 4 which is supported by the bearing 70 inside the housing 2 to receive the driving force of the motor, the bearing cover 8 which prevents the protection and detachment of the bearing inside the bearing housing 2, and the rotating shaft 4 A centrifugal pump, which is integrally assembled at the end and is composed of an impeller 9 for sucking and discharging water into the casing 1;

The rotating shaft 41 and the rotating shaft 41 having the screw engaging portion 46 formed therein for easy bearing replacement are composed of three parts of the rotating shaft impeller side 42, the rotating shaft bearing side 43, and the rotating shaft motor side 44. And, the flat portion 45 is formed on the circumference to facilitate screwing is to facilitate the replacement of the bearing.

Description

Rotary shaft of centrifugal pump

The present invention relates to a centrifugal pump rotating shaft, in particular to solve the improvement of bearing replacement workability.

Conventional centrifugal pumps as shown in Figure 1 and 2, the gland packing for supporting the rotating shaft (4) by inserting the casing (1) and bearing housing (2) and the casing cover (3) constituting the pump body ( 5) and the gland 6, the rotating shaft (4) supported by the bearing (7) in the bearing housing (2) to receive the driving force of the motor, and to prevent the protection and separation of the bearing in the bearing housing (2) It is composed of a bearing cover (8) and an impeller (9) which is integrally assembled at the end of the rotating shaft (4) to suck and discharge water into the casing (1).

The rotational force transmitted to the rotary shaft 4 of the centrifugal pump rotates the impeller 9, the center of the vacuum is sucked by the rotation of the impeller 9, and water is sucked in, and the centrifugal force is applied by the rotation of the impeller 9. The water is discharged to the outside between the casing (1) and the casing cover (3).

At this time, the inner ring of the bearing 7 supporting the rotating shaft 4 is seized on the rotating shaft and assembled together with the rotating shaft, and rotates together, and the outer ring is assembled with an interference tolerance in the bearing housing 2 and stopped to rotate the motor. The low force can be smoothly transmitted to the rotary shaft 4.

If pump maintenance or bearing replacement is required, the shaft and bearing (7) must be disassembled from the bearing housing (2), then the bearing (7) must be replaced and reassembled. At this time, the bearing 7 is shrinked on the rotating shaft 4, so it is difficult to remove the bearing 8 from the rotating shaft 4 at room temperature. When a new bearing is inserted into the rotating shaft, heat can be transferred to the inner ring of the bearing. The need for a device leads to difficulties in urgent maintenance.

In addition, in developing a series of pumps, the rotary shaft-empeller 42 related to the pump size and the rotary shaft-motor side 44 related to the required power are integrated, so that it is difficult to standardize and share, resulting in an increase in the type of the rotary shaft. There is this.

The present invention is drawn to solve this conventional problem;

The purpose is to facilitate the bearing replacement by splitting and connecting the rotating shaft.

1 is a block diagram of a conventional centrifugal pump.

Figure 2 is an enlarged cross-sectional view taken from the rotating shaft shrinkage of the conventional bearing.

Figure 3 is an enlarged cross-sectional view taken from the axis of rotation of the present invention.

4 is an exploded view of a rotating shaft of the present invention.

5 is a cross-sectional view of the planar portion of FIG. 4.

* Explanation of symbols for main parts of the drawings

10: casing 20: bearing housing

30: casing cover 60: gland

41: rotating shaft 46: screw connection

42: rotating shaft impeller side 43: rotating shaft bearing side

44: rotation shaft motor side 80: bearing cover

90 impeller

The present invention is a gland for supporting the rotating shaft (4) by inserting the casing (1) and the bearing housing (2) and the casing cover (3) constituting the pump body in order to solve the conventional object and achieve the object The protection of the packing 5 and the gland 6, the bearing 70 inside the bearing housing 2 with the bearing 70 and the rotating shaft 4 receiving the driving force of the motor, and the bearing inside the bearing housing 2 are prevented. A centrifugal pump composed of a bearing cover (8) for preventing and an impeller (9) integrally assembled at the end of the rotating shaft (4) to suck and discharge water into the casing (1);

The rotating shaft 41 and the rotating shaft 41 having the screw engaging portion 46 formed therein for easy bearing replacement are composed of three parts of the rotating shaft impeller side 42, the rotating shaft bearing side 43, and the rotating shaft motor side 44. And, the flat portion 45 is formed on the circumference to facilitate screwing is to facilitate the replacement of the bearing.

The present invention configured as described above has the same principle as the centrifugal pump operation described above, so the description thereof will be omitted and only the features of the present invention will be described.

When assembling the bearing 70, the bearing 70 can be easily replaced without a device for transferring heat to the inside of the bearing 70 by separating the rotating shaft 41 having a three-part rotating shaft 41, thereby improving maintenance. When the bearing 70 is disassembled, damage to the rotating shaft 41 due to external force can also be prevented.

As such, the present invention has the effect of improving the quality and reliability of the pump by extending the life of the pump by solving the difficulty of bearing replacement work by changing the rotation shaft structure.

In addition, in the development of the series of pumps, the rotary shaft is divided into three parts, so when the pump size and power is changed, only a part can be used.

This can increase the common use of the rotating shaft, the standardization rate.

Claims (3)

The gland packing and gland, which is inserted into the casing, bearing housing and casing cover of the pump body to support the rotating shaft, the rotating shaft supported by the bearing inside the bearing housing to receive the driving force of the motor, and the protection of the bearing and In the centrifugal pump consisting of a bearing cover to prevent separation and an impeller integrally assembled at the end of the rotating shaft to suck and discharge water into the casing; The rotating shaft is a rotating shaft structure of the centrifugal pump, characterized in that it has a screw coupling portion. The method of claim 1, The rotating shaft is a rotating shaft structure of a centrifugal pump, comprising a rotating shaft impeller side, a rotating shaft bearing side, and a rotating shaft motor shaft, each of which has a screw engaging portion. The method of claim 1, A rotating shaft structure of a centrifugal pump, characterized in that a flat portion is formed on the circumference of the rotating shaft to facilitate screwing.