CN211343472U - A centrifugal pump with strong centrifugal force and strong cavitation resistance - Google Patents

Abstract

The utility model discloses a centrifugal pump with strong centrifugal force and strong cavitation resistance, which comprises a motor and a pump body, an output shaft of the motor is mechanically connected to one end of a transmission shaft, and the other end of the transmission shaft penetrates one side of the pump body and protrudes into it. The pump body is connected with the impeller. The other side of the pump body is provided with a sealing circular plate. The sealing circular plate is fastened with the outer plate of the pump body through sink bolts along the circumference. The pump body is provided with a water inlet pipe and a water outlet pipe. An ejection tube is connected between the pipeline and the water inlet pipeline, and a regulating valve is arranged on the ejection tube. The impeller of the utility model has sufficient power and can be replaced, avoids the occurrence of cavitation, and improves the anti-cavitation performance of the centrifugal pump.

Description

A centrifugal pump with strong centrifugal force and strong cavitation resistance

technical field

The utility model belongs to the field of pumps, in particular to a centrifugal pump with strong centrifugal force and strong cavitation resistance.

Background technique

Centrifugal pump is a pumping machine that utilizes the centrifugal motion of water. Before starting the centrifugal pump, the pump should be filled with water. After starting, the rotating impeller drives the water in the pump to rotate at a high speed.

In the process of working, the impeller is the most important part. Insufficient power of the impeller will cause the centrifugal force of the entire centrifugal pump to decrease. Moreover, the long-term working impeller is easy to be damaged, but it is not easy to replace, which affects the service life of the pump. It is necessary to upgrade the impeller of the centrifugal pump. When the rotating speed is high, the pressure compensation of the high-pressure fluid to the low-pressure fluid cannot be adjusted freely with the increase of the impeller rotating speed, and the occurrence of cavitation cannot be effectively avoided, which reduces the anti-cavitation performance of the centrifugal pump.

Utility model content

Aiming at the deficiencies of the prior art, the utility model provides a centrifugal pump with strong centrifugal force and strong cavitation resistance. The impeller has sufficient power and can be replaced, which avoids the occurrence of cavitation and improves the cavitation resistance of the centrifugal pump.

The utility model is realized by the following technical solutions: a centrifugal pump with strong centrifugal force and strong cavitation resistance, comprising a motor and a pump body, an output shaft of the motor is mechanically connected to one end of a transmission shaft, and the other end of the transmission shaft is mechanically connected. One end extends into the pump body through one side of the pump body and is connected with the impeller, the impeller includes a large impeller and a small impeller, the middle part of the large impeller is sleeved into the other end of the transmission shaft, and passes through The way of screw connection is connected with the other end of the transmission shaft, the large impeller is spaced with concave grooves along the peripheral side, the middle part of the small impeller is sleeved into the other end of the transmission shaft, and is in close contact with the large impeller The middle part of the small impeller is clamped into the concave groove, the middle part of the small impeller is fastened on the other end of the transmission shaft by a nut, and the other side of the pump body is provided with a sealing circular plate The sealing circular plate is fastened with the outer plate of the pump body through the sink bolt along the circumference. The pump body is provided with a water inlet pipe and a water outlet pipe, and a lead pipe is connected between the water outlet pipe and the water inlet pipe. The ejector tube is provided with a regulating valve.

Compared with the prior art, the beneficial effects of the present utility model are:

1. The utility model adopts the middle part of the large impeller to be connected with the other end of the transmission shaft by means of threaded connection, and the middle part of the small impeller is sleeved into the other end of the transmission shaft and is closely attached to the middle part of the large impeller, and the small impeller is The middle part is fastened to the other end of the transmission shaft, and the mixed assembly of the large impeller and the small impeller is used to work together to enhance the centrifugal force in the pump body, making the water delivery faster, and the large impeller and the small impeller are detachable structures. It can be replaced in time when damaged, which greatly improves the service life.

2. An ejector pipe is connected between the water outlet pipe and the water inlet pipe of the present utility model, and the ejector pipe is provided with a regulating valve, so that the pressure compensation of the high-pressure fluid to the low-pressure fluid can be freely adjusted with the increase of the impeller speed, effectively avoiding cavitation. The occurrence of the phenomenon improves the anti-cavitation performance of the centrifugal pump.

Description of drawings

Fig. 1 is the front view structure diagram of the present utility model;

Fig. 2 is the top view structure schematic diagram of the present utility model;

Fig. 3 is the structure schematic diagram of the large impeller of the present utility model;

Fig. 4 is the structure schematic diagram of the small impeller of the present utility model;

FIG. 5 is a schematic structural diagram of the combination of the small impeller in FIG. 4 and the large impeller in FIG. 3 .

In the drawings: 1. Motor; 2. Pump body; 3. Transmission shaft; 4. Sealing disc; 5. Impeller; 51. Large impeller; 52. Small impeller; . Nut; 8. Water inlet pipe; 9. Water outlet pipe; 10. Ejector pipe; 11. Regulating valve.

Detailed ways

As shown in Figures 1 to 5 in the accompanying drawings, a centrifugal pump with strong centrifugal force and strong cavitation resistance includes a motor 1 and a pump body 2. The output shaft of the motor 1 is mechanically connected to one end of a transmission shaft 3, and the transmission shaft The other end of 3 extends into the pump body 2 through one side of the pump body 2 and is connected with the impeller 5. The impeller 5 includes a large impeller 51 and a small impeller 52, and the middle part of the large impeller 51 is sleeved into the other end of the transmission shaft 3, and It is connected with the other end of the transmission shaft 3 by means of screw connection, the large impeller 51 is spaced with concave grooves 511 along the peripheral side, the middle part of the small impeller 52 is sleeved into the other end of the transmission shaft 3, and is close to the middle part of the large impeller 51, The blades of the small impeller 52 are snapped into the concave groove 511, the middle of the small impeller 52 is fastened on the other end of the transmission shaft 3 through the nut 7, the other side of the pump body 2 is provided with a sealing circular plate 4, and the sealing circular plate 4 is along the The circumference is fastened with the outer plate of the pump body 2 through the sink bolt 6. The pump body 2 is provided with a water inlet pipe 8 and a water outlet pipe 9, and an ejector pipe 10 is connected between the water outlet pipe 9 and the water inlet pipe 8. A regulating valve 11 is provided on the pipe 10 .

The impeller 5 is composed of a mixed assembly of a large impeller 51 and a small impeller 52. In the process of rotating to generate centrifugal force, the degree of centrifugal force is stronger, so that the water can quickly enter the pump body 2, and can quickly transport the water out, greatly improving the To improve the working quality of the centrifugal pump, when the impeller 5 needs to be replaced after a long time of operation, unscrew the sink bolt 6 to separate the sealing disc 4 from the outer plate of the pump body 2, and remove the nut 7 from the drive with external threads. The other end of the shaft 3 is screwed out, the small impeller 52 is taken out, and then the large impeller 51 is screwed out of one end of the transmission shaft 3 through the inner thread opened on the inner side wall; There is a regulating valve 11 on the ejection pipe 10 of the centrifugal pump. The regulating valve 11 can realize the pressure compensation of the high-pressure fluid to the low-pressure fluid and freely adjust with the increase of the impeller speed, effectively avoid the occurrence of cavitation, and improve the anti-cavitation of the centrifugal pump. performance.

To sum up, it is only a preferred embodiment of the present invention, and is not used to limit the scope of the present invention. All shapes, structures, features and spirits described in the scope of the claims of the present invention are equal Changes and modifications should be included within the scope of the claims of the present invention.

Claims (1)

1. A centrifugal pump with strong centrifugal force and strong cavitation resistance, comprising a motor (1) and a pump body (2), characterized in that: the output shaft of the motor (1) is mechanically connected to one end of a transmission shaft (3) , the other end of the drive shaft (3) extends through one side of the pump body (2) into the pump body (2) and is connected to the impeller (5), the impeller (5) includes a large impeller ( 51) and a small impeller (52), the middle of the large impeller (51) is sleeved into the other end of the transmission shaft (3), and is connected with the other end of the transmission shaft (3) by means of screw connection , the large impeller (51) is provided with concave grooves (511) at intervals along the peripheral side, and the middle part of the small impeller (52) is sleeved into the other end of the transmission shaft (3), and is in close contact with the large impeller ( 51), the blades of the small impeller (52) are snapped into the concave groove (511), and the middle part of the small impeller (52) is fastened to the transmission shaft (3) through the nut (7). On the other end, the other side of the pump body (2) is provided with a sealing circular plate (4), and the sealing circular plate (4) is connected to the pump body (2) through the countersunk bolts (6) along the circumference. The outer plate is fastened, the pump body (2) is provided with a water inlet pipe (8) and a water outlet pipe (9), and an ejection pipe (8) is connected between the water outlet pipe (9) and the water inlet pipe (8). 10), a regulating valve (11) is provided on the ejection pipe (10).

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