CN219529337U - Concentricity correction device for immersion type vertical multistage centrifugal pump - Google Patents

Abstract

The utility model discloses a concentricity correction device of an immersed vertical multistage centrifugal pump, which relates to the field of centrifugal pump assembly and comprises a base and a hydraulic device, wherein the centrifugal pump comprises a pump head, a water inlet body connected with the pump head, a pull rod for tensioning the pump head and the water inlet body and a pump shaft driven by a motor, the motor installation side of the pump head is matched with the base for positioning, and the pump shaft is sleeved into a shaft hole formed in the base for positioning, so that the pump head and the pump shaft are concentric; the hydraulic device is used for pressing the water inlet body downwards along the length direction of the pull rod and correcting the concentricity of the pull rod. The base adopts a multi-spigot stepped structure, is suitable for positioning different pump heads, and is matched with the pump heads during assembly; the sleeve structure arranged on the base is used for positioning the pump shaft, and meanwhile, the press-fitting equipment is additionally arranged, so that the concentricity of the centrifugal pump during assembly is ensured.

Description

Concentricity correction device for immersion type vertical multistage centrifugal pump

Technical Field

The utility model relates to the field of centrifugal pump assembly, in particular to a concentricity correction device of an immersion type vertical multistage centrifugal pump.

Background

At present, when the centrifugal pump is assembled, the pump head and the pump shaft are not provided with positioning devices, and after the assembly is completed, the concentricity of the pump head, the pump shaft and the water inlet body cannot be ensured. In addition, the lack of a press-fit structure during assembly can not ensure the consistency of the torque of a pull rod of the centrifugal pump, and can cause the phenomenon of non-concentricity of the flow passage components of the multistage centrifugal pump. For this reason, it is necessary to develop a correction device that ensures concentricity at the time of assembly of the centrifugal pump.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides a concentricity correction device of an immersion type vertical multistage centrifugal pump, wherein a base adopts a multi-spigot stepped structure, and is suitable for positioning different pump heads, and a base spigot is matched with a pump head spigot during assembly; the sleeve structure arranged on the base is used for positioning the pump shaft, and meanwhile, the press-fitting equipment is additionally arranged, so that the concentricity of the centrifugal pump during assembly is ensured.

The utility model aims at being completed by the following technical scheme: the concentricity correction device of the immersed vertical multistage centrifugal pump is used for assembling the centrifugal pump and comprises a base and a hydraulic device, wherein the centrifugal pump comprises a pump head, a water inlet body connected with the pump head, a pull rod for tensioning the pump head and the water inlet body and a pump shaft driven by a motor, the motor mounting side of the pump head is matched with the base for positioning, and the pump shaft is sleeved into a shaft hole formed in the base for positioning, so that the pump head and the pump shaft are concentric; the hydraulic device is used for pressing the water inlet body downwards along the length direction of the pull rod and correcting the concentricity of the pull rod.

As a further technical scheme, the base comprises a locating plate and a locating sleeve which is detachably arranged on the locating plate, the shaft hole is formed in the top of the locating sleeve, a base spigot is arranged on the locating plate and coaxial with the shaft hole, and the motor installation side is matched and located with the base spigot through a pump head spigot.

As a further technical scheme, the base spigot is composed of multiple steps, and the outer diameters of the multiple steps are gradually increased from top to bottom, so that the base spigot is suitable for pump head spigots with different calibers.

As a further technical scheme, the groove is formed in the top of the positioning plate and used for placing the positioning sleeve, and the positioning sleeve is in threaded connection in the groove.

As a further technical scheme, the positioning sleeves are multiple, the inner diameters of shaft holes among the positioning sleeves are different, and the positioning sleeves are selectively arranged on the positioning plate to adapt to pump shafts with different outer diameters.

As a further technical scheme, the hydraulic device comprises a hydraulic arm and a pressure plate driven to rise and fall by the hydraulic arm, the pressure plate is horizontally contacted with the top of the water inlet body, and the hydraulic device compresses the water inlet body through the pressure plate.

The beneficial effects of the utility model are as follows:

1. the pump head is matched with the base through the spigot, and the pump shaft is positioned with the base through the positioning sleeve, so that concentricity between the pump head and the pump shaft is ensured;

2. the base spigot is composed of multiple steps, and the pump head spigot is selectively matched and positioned with one of the multiple steps, so that the universality of pump heads with different calibers is ensured;

3. after the water inlet body horizontally contacts with the pressure plate, the pull rod is pressed downwards, so that the consistency of torque when the pull rod is screwed up in sequence can be ensured, and the eccentric problem can be corrected;

4. the positioning sleeve is detachably connected with the positioning plate, and the positioning sleeve with corresponding inner diameter can be replaced according to different pump shaft outer diameters.

Drawings

Fig. 1 is a schematic view of the assembled structure of the centrifugal pump.

Fig. 2 is a schematic structural view of a base in the present utility model.

Fig. 3 is a schematic structural view of a positioning plate according to the present utility model.

Reference numerals illustrate: base 1, positioning sleeve 11, locating plate 12, shaft hole 13, base tang 14, recess 15, pump head 2, motor installation side 21, pump head tang 22, pump shaft 3, stator 4, pull rod 5, intake 6, pressure disk 7, hydraulic arm 8.

Detailed Description

The utility model will be described in detail below with reference to the attached drawings:

examples: as shown in figures 1-3, the concentricity correction device for the immersion type vertical multistage centrifugal pump comprises a base 1, a positioning sleeve 11, a positioning plate 12, a shaft hole 13, a base spigot 14, a groove 15, a pump head 2, a motor mounting side 21, a pump head spigot 22, a pump shaft 3, a guide vane 4, a pull rod 5, a water inlet body 6, a pressure plate 7 and a hydraulic arm 8.

Referring to fig. 1, the vertical multistage centrifugal pump is placed vertically, and comprises a pump head 2, a water inlet body 6 arranged above the pump head 2 and connected with the pump head 2, a pull rod 5 for tensioning the pump head 2 and the water inlet body 6, and a pump shaft 3 driven by a motor, wherein an impeller is sleeved on the periphery of the pump shaft 3, and guide vanes 4 are arranged on the periphery of the impeller. The base 1 comprises a positioning plate 12 and a positioning sleeve 11 detachably mounted on the positioning plate 12, a shaft hole 13 is formed in the top of the positioning sleeve 11, a base spigot 14 is arranged on the positioning plate 12 and coaxial with the shaft hole 13, a motor mounting side 21 (the lower part in fig. 1) of the pump head 2 is matched and positioned with the base spigot 14 through a pump head spigot 22, and meanwhile, the pump shaft 3 is sleeved in the shaft hole 13 and matched and positioned with the positioning sleeve 11. In this way, concentricity of the pump head 2 and the pump shaft 3 is ensured.

Further, the pressure plate 7 is installed on the hydraulic arm 8 driven to rise and fall by the hydraulic device, the pressure plate 7 horizontally contacts with the top of the water inlet body 6, the pressure plate 7 compresses the water inlet body 6 along the length direction (namely the vertical direction) of the pull rod 5 under the action of the hydraulic device, the concentricity of the pull rod 5 is corrected, the pull rod 5 is screwed down again at the moment, the consistency of torque when the pull rod 5 is screwed down successively can be ensured, and the eccentric problem can be corrected.

Preferably, as shown in fig. 2 and 3, the base spigot 14 is composed of multiple steps, the outer diameters of the multiple steps are gradually increased from top to bottom, and the pump head spigots 22 with different calibers can be matched and positioned with the base spigots 14 with corresponding outer diameters, so that the universality of the correction device for pump heads with different calibers is ensured.

Further, a groove 15 is formed at the top of the positioning plate 12 for placing the positioning sleeve 11, and the positioning sleeve 11 is connected in the groove 15 through threads. Preferably, the positioning sleeve 11 can be provided with a plurality of positioning sleeves, the inner diameters of the shaft holes 13 on each positioning sleeve 11 are different, and for the pump shafts 3 with different outer diameters, the positioning sleeve 11 with the corresponding inner diameter shaft holes 13 can be selected and connected to the positioning plate 12 in a threaded manner, so that the universality of different pump shaft diameters is realized.

The working process of the utility model comprises the following steps: as shown in fig. 1, before correction, the positioning sleeve 11 with the corresponding inner diameter is selected according to the diameter of the pump shaft 3, the positioning sleeve 11 is mounted on the positioning plate 12, then the motor mounting side 21 of the pump body 2 faces the positioning plate 12, the pump head spigot 22 is matched with the base spigot 14 with the corresponding outer diameter on the positioning plate 12 in a positioning way, and meanwhile, the pump shaft 3 is sleeved in the shaft hole 13, so that concentricity correction between the pump shaft 3 and the pump head 2 is completed. Next, the platen 7 is adjusted so that the lower end face thereof is kept parallel to the water inlet body 6, and then the hydraulic device is started until the platen 7 horizontally contacts and presses against the water inlet body. After the concentricity correction of the tie rod 5 is completed, the installation and tightening of the tie rod 5 can be started.

Term interpretation:

water inlet body: collecting the medium filtered by the filter screen and introducing the medium into the parts of the deflector;

and (3) a pump shaft: the core component of the rotor part of the centrifugal pump, an impeller of the centrifugal pump, a shaft sleeve and the like are arranged on a pump shaft, and rotate on a bearing through the pump shaft;

pump head: parts for connecting the motor, the centrifugal pump flow-through component and the outlet pipeline;

guide vane: collecting the medium flowing out of the impeller and conveying the medium to the part of the next-stage impeller;

a pull rod: a tensioning piece connecting the pump head and the water inlet body;

torque: a special moment for rotating the object;

concentricity: the degree of deviation of the circle center is a special form of coaxiality;

hydraulic arm: the machine uses liquid as working medium to transfer energy to realize various processes, and is commonly used for correction, press fitting, packing, briquetting, pressing plate and the like;

a spigot: and the structure is used for centering and connecting.

It should be understood that equivalents and modifications to the technical scheme and the inventive concept of the present utility model should fall within the scope of the claims appended hereto.

Claims (6)

1. Concentricity correction device of immersion type vertical multistage centrifugal pump, which is used for assembling the centrifugal pump and is characterized in that: the centrifugal pump comprises a base (1) and a hydraulic device, wherein the centrifugal pump comprises a pump head (2), a water inlet body (6) connected with the pump head (2), a pull rod (5) for tensioning the pump head (2) and the water inlet body (6) and a pump shaft (3) driven by a motor, a motor installation side (21) of the pump head (2) is matched with the base (1) for positioning, and the pump shaft (3) is sleeved into a shaft hole (13) formed in the base (1) for positioning, so that the pump head (2) and the pump shaft (3) are concentric; the hydraulic device is used for pressing the water inlet body (6) downwards along the length direction of the pull rod (5) and correcting the concentricity of the pull rod (5).

2. The immersion type vertical multistage centrifugal pump concentricity correction device according to claim 1, wherein: the base (1) comprises a locating plate (12) and a locating sleeve (11) detachably mounted on the locating plate (12), the shaft hole (13) is formed in the top of the locating sleeve (11), a base spigot (14) is arranged on the locating plate (12) and coaxial with the shaft hole (13), and the motor mounting side (21) is matched and positioned with the base spigot (14) through a pump head spigot (22).

3. The immersion type vertical multistage centrifugal pump concentricity correction device according to claim 2, wherein: the base spigot (14) is composed of multiple steps, and the outer diameters of the multiple steps are gradually increased from top to bottom so as to adapt to pump head spigots (22) with different calibers.

4. The immersion type vertical multistage centrifugal pump concentricity correction device according to claim 3, wherein: the top of the positioning plate (12) is provided with a groove (15) for placing the positioning sleeve (11), and the positioning sleeve (11) is in threaded connection in the groove (15).

5. The immersion type vertical multistage centrifugal pump concentricity correction device according to claim 4, wherein: the positioning sleeves (11) are multiple, the inner diameters of shaft holes (13) between the positioning sleeves (11) are different, and the positioning sleeves (11) are selectively arranged on the positioning plate (12) so as to adapt to pump shafts (3) with different outer diameters.

6. The immersion type vertical multistage centrifugal pump concentricity correction device according to any one of claims 1 to 5, wherein: the hydraulic device comprises a hydraulic arm (8) and a pressure plate (7) driven to rise and fall by the hydraulic arm (8), wherein the pressure plate (7) is horizontally contacted with the top of the water inlet body (6), and the hydraulic device compresses the water inlet body (6) through the pressure plate (7).