JP2002013495A - Vertical pump - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent abrasion of a bearing of a vibration preventing portion of a vertical pump. SOLUTION: An outer tube for taking a liquid containing a solid content into the inside from an inlet, an inflow port arranged inside the outer tube and leading to the inside of the outer tube, and an outlet opening passing through the outer tube and leading to the outside. , A shaft 10 disposed inside the inner tube and having a sleeve 11 detachably fitted in the middle thereof, a drive source for rotating the shaft 10, and a liquid sucked from the inlet of the outer tube. A centrifugal pump that rotates the impeller by rotation of the shaft 10 so that the impeller is sent from the inlet of the inner pipe to the outlet.
The shaft 10 is supported by a bearing 22 supported by a support plate 20 extending from the inner tube, and the bearing 22
A vertical pump provided with an anti-shake portion 19 for lubricating the space between the shaft and the sleeve 11 with a liquid. , A centrifugal force is generated to flow the solids in the liquid to the peripheral side of the inner tube.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical pump for pumping a liquid such as LNG from underground.

[0002]

2. Description of the Related Art When pumping liquid such as LNG from underground, a vertical pump is used.

A vertical pump is provided with an outer pipe 1 having a predetermined length as shown in FIG. 5, and an inner space of the outer pipe 1 is divided from a distal end to a partition wall 2 by a partition wall 2 at an intermediate position in a longitudinal direction. Is divided into a liquid introduction space 3 and a drive source space 4 extending from the partition wall 2 to the rear, and a drive source motor 5 standing on the partition wall 2 is disposed in the drive source space 4 of the outer tube 1. And outer tube 1
In the outer wall, an inlet 6 is formed near the partition wall 2 and communicates with the liquid introducing space 3 from outside.

In the liquid introduction space 3 of the outer tube 1, an inner tube 7 which is substantially coaxial with the outer tube 1 and extends from the partition wall 2 to near the distal end of the outer tube 1 is disposed. 7 has an outer tube 1
The inner wall of the inner pipe 7 is provided with a tubular outlet 9 which penetrates the outer pipe 1 to the outside near the partition wall 2.

On the other hand, a motor 10 installed in the drive source space 4 is rotatably provided with a shaft 10 that penetrates through the partition wall 2 and extends substantially coaxially with the inner tube 7 and near the tip of the inner tube 7. The shaft 10 which is disposed and is located on the liquid introduction space 3 side
A detachable sleeve 11 is externally fitted in the middle part of.

[0006] A plurality of stages of centrifugal pumps 12 are provided near the tip of the shaft 10. The centrifugal pump 12 has an impeller 13 attached to the shaft 10. Screw 14 located at 8
Is provided.

On the other hand, the shaft 1 on which the sleeve 11 is fitted
The inner tube 7 surrounding the inner tube 7 is provided with an anti-shake portion 15, and the anti-shake portion 15 includes a support plate 16 extending radially from the inner wall of the inner tube 7 to the vicinity of the shaft 10 as shown in FIG. 6. A cylindrical bush 17 is arranged at the end of the support plate 16 so as to surround the sleeve 11, and a cylindrical material made of carbon is used on the inner surface of the bush 17 so as to leave a slight gap between the bush 17 and the sleeve 11. , That is, a carbon bearing 18.

When pumping a liquid such as LNG, the impeller 13 and the screw 14 of the centrifugal pump 12 are rotated via the shaft 10 by the drive of the motor 5 so that the outer tube 1 The liquid is sucked in the direction of the tip 1 and taken into the inside of the inner tube 7 through the inlet 8 of the inner tube 7, and passes through the support plate 16 of the anti-shake portion 15 from the inlet 8 inside the inner tube 7. Outlet 9 at the top so as to rise
And send it out of the outlet 9.

At this time, the sleeve 11 of the shaft 10 is supported by the carbon bearing 18 of the anti-shake portion 15 so that the shaft 10 is not shaken when the shaft 10 rotates by the drive of the motor 5. Liquid flows through the gap between the holes 11 to improve the lubrication of the rotation of the shaft 10.

[0010]

However, since the liquid to be pumped contains solids, which are heavy metals such as iron, the liquid is removed by the carbon bearings 18 of the anti-shake portion 15.
When passing between the sleeve and the sleeve 11, minute solids enter between the carbon bearing 18 and the sleeve 11, and the carbon bearing 18 is significantly worn to cause the shaft 10 to shake and break.

The vertical pump of the present invention has been made in view of the above-mentioned circumstances, and is intended to prevent abrasion of a carbon bearing of an anti-shake portion.

[0012]

According to the first aspect of the present invention, there is provided an outer tube for taking in a liquid containing a solid content from an inlet, and an inner tube arranged inside the outer tube to communicate with the inner tube. An inner pipe having an inlet and an outlet which penetrates through the outer pipe and communicates with the outside; a shaft which is disposed inside the inner pipe and which has a sleeve detachably attached to a middle part thereof; and which rotates the shaft. A drive source, a centrifugal pump for rotating the impeller by rotation of the shaft so as to suck the liquid from the inlet of the outer tube and deliver the liquid from the inlet of the inner tube to the outlet, and a support extending from the inner tube An anti-shake portion that supports the shaft with a bearing supported on a plate and lubricates between the bearing and the sleeve with the liquid, the anti-shake portion being located upstream of the flow path of the shaft of the anti-shake portion. Equipped with rotor blades, shuff Those of the vertical pump, characterized in that caused the centrifugal force configured to flow the solids in the liquid of the inner tube to the perimeter to the liquid by the rotation of the.

According to a second aspect of the present invention, there is provided an outer tube for taking in a liquid containing a solid content from an inlet, an inlet provided inside the outer tube and communicating with the outer tube, and an outer tube. An inner pipe having a discharge port that penetrates to the outside, a shaft that is disposed inside the inner pipe, and has a sleeve that is detachably fitted in a middle part, a drive source that rotates the shaft, and the liquid Centrifugal pump for rotating the impeller by rotation of the shaft so as to suck the gas from the inlet of the outer tube and send it from the inlet to the outlet of the inner tube, and a bearing supported by a support plate extending from the inner tube A vertical pump having a vibration-reducing portion for supporting the shaft and lubricating the space between the bearing and the sleeve with the liquid. With shaft Vertical pump which is characterized by being configured to flow to the perimeter of the inner tube solids occurs a centrifugal force to the liquid in the liquid by the rotation, in which according to the.

At the time of pumping the liquid, the impeller of the centrifugal pump is rotated through the shaft by the drive of the driving source, so that the liquid is sucked from the inlet of the outer tube and the inner tube is fed from the inlet of the inner tube. In the inner tube, the water passes through the support plate of the anti-shake portion from the inflow port to the outlet, and is sent out from the outlet.

At this time, in the shake preventing section, the rotating blades located on the upstream side of the flow path of the shake preventing section rotate with the rotation of the shaft, thereby generating a centrifugal force in the liquid and causing the solid matter having a high specific gravity to flow inside. Flush to the perimeter of the tube.

As described above, according to the first and second aspects of the present invention, the solid content is caused to flow to the peripheral side of the inner tube by the centrifugal force by rotating the rotor, so that the solid content is generated between the bearing and the sleeve. Since it is prevented from circulating, wear of the bearing of the anti-shake portion due to solid content is eliminated, and as a result, shake and breakage of the shaft due to wear of the bearing can be suppressed.

According to the second aspect of the present invention, since the rotating blade is provided on the sleeve detachable from the shaft, the rotating blade can be easily replaced when worn or damaged.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a vertical pump according to a first embodiment of the present invention.

The anti-shake portion 19 of the vertical pump is provided with a support plate 20 extending radially from the inner wall of the inner tube to the vicinity of the shaft 10 at a position where the sleeve 11 detachably attached to the shaft 10 is fitted. A cylindrical bush 21 is arranged at the end of the sleeve 20 so as to surround the sleeve 11, and a cylindrical bearing using carbon as a raw material, that is, leaving a slight gap between the bush 21 and the sleeve 11 on the inner surface of the bush 21. A carbon bearing 22 is mounted.

On the upstream side of the flow path of the shaft 10,
3, and the rotary wing 23 includes an annular pedestal plate 24 attached to the shaft 10, and a plurality of axially symmetrical wings 25 arranged on a surface of the pedestal plate 24 on the flow path upstream side. Each wing 25 is formed to be curved in a predetermined direction.

The operation of the first embodiment of the present invention will be described below.

In the process of pumping the liquid, when a liquid containing a solid such as iron having a high specific gravity passes through the anti-shake portion 19, the rotating wings 23 located upstream of the anti-shake portion 19 flow through the shaft. By rotating with the rotation of 10, a centrifugal force is generated in the liquid to cause a solid having a high specific gravity to flow toward the peripheral side of the inner tube, and to flow the solid together with the liquid downstream from between the inner tube and the bush 21.

As described above, by rotating the rotor 23, the solid content is caused to flow to the peripheral side of the inner tube by centrifugal force, thereby preventing the minute solid content from flowing between the carbon bearing 22 and the sleeve 11. , Anti-shake part 1 by solid content
The wear of the carbon bearing 22 is eliminated, and as a result, the shaft 10 can be prevented from being shaken and damaged due to the wear of the carbon bearing 22.

FIGS. 3 and 4 show a vertical pump according to a second embodiment of the present invention.

The anti-shake portion 26 of the vertical pump includes a support plate 28 extending radially from the inner wall of the inner tube to the vicinity of the shaft 10 at a position where a sleeve 27 detachably attached to the shaft 10 is fitted. A cylindrical bush 29 is disposed at the end of the sleeve 28 so as to surround the sleeve 27, and a cylindrical bearing using carbon as a raw material, that is, leaving a slight gap between the bush 29 and the sleeve 27 on the inner surface of the bush 29. A carbon bearing 30 is mounted.

A rotating blade 31 is provided at a position on the upstream side of the flow path of the sleeve 27 of the shake preventing portion 26.
An annular pedestal plate 32 attached to the sleeve 27, and a plurality of axially symmetric blades 33 arranged on a surface of the pedestal plate 32 on the upstream side of the flow path, each of the wings 33 bends in a predetermined direction. It is formed.

The operation of the second embodiment of the present invention will be described below.

In the process of pumping the liquid, when a liquid containing a solid such as iron having a high specific gravity passes through the anti-shake portion 26, the rotary wing 31 located on the upstream side of the flow path of the anti-shake portion 26 is driven by a shaft. By rotating through the sleeve 27 for 10 rotations, a centrifugal force is generated in the liquid to cause a solid having a high specific gravity to flow toward the peripheral side of the inner tube, and the solid is discharged together with the liquid downstream from between the inner tube and the bush 29. Pour into

As described above, by rotating the rotor 31, the solid content is caused to flow toward the periphery of the inner tube by centrifugal force, thereby preventing the minute solid content from flowing between the carbon bearing 30 and the sleeve 27. , Anti-shake part 2 by solid content
6, the wear of the carbon bearing 30 is eliminated, and as a result, the shaft 10 can be prevented from being shaken or damaged due to the wear of the carbon bearing 30.

Further, since the rotating blades 31 are provided on the sleeve 27 which can be attached to and detached from the shaft 10, the rotating blades can be easily replaced when worn or damaged.

It should be noted that the vertical pump of the present invention may be of any shape, provided that the centrifugal force is applied to the liquid so that the solid does not flow between the carbon bearing and the sleeve. It goes without saying that various changes can be made without departing from the spirit of the invention.

[0033]

According to the vertical pump of the present invention, various excellent effects can be obtained as follows.

According to the first and second aspects of the present invention, the solids are caused to flow to the peripheral side of the inner tube by centrifugal force by rotating the rotor, so that the solids are formed between the bearing and the sleeve. Since it is prevented from flowing, the wear of the bearing of the anti-shake portion due to the solid content is eliminated, and as a result, the shake and breakage of the shaft due to the wear of the bearing can be suppressed.

II) According to the second aspect of the present invention, since the rotor is provided on the sleeve detachable from the shaft, the rotor can be easily replaced when it is worn or damaged.

[Brief description of the drawings]

FIG. 1 is an enlarged side sectional view showing a shake preventing portion of a vertical pump according to a first embodiment of the present invention.

FIG. 2 is a view in the direction of arrows II-II in FIG. 1;

FIG. 3 is an enlarged side cross-sectional view illustrating a shake preventing portion of a vertical pump according to a second embodiment of the present invention.

FIG. 4 is a view in the direction of arrows IV-IV in FIG. 3;

FIG. 5 is a vertical sectional side view showing an example of a conventional vertical pump.

FIG. 6 is an enlarged side sectional view showing a shake preventing portion provided in the vertical pump.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer pipe 5 Motor (drive source) 6 Inlet 7 Inner pipe 8 Inflow 9 Outlet 10 Shaft 11 Sleeve 12 Centrifugal pump 13 Impeller 19 Shake prevention part 20 Support plate 22 Carbon bearing (bearing) 23 Rotor blade 26 Shake prevention Part 27 sleeve 28 support plate 30 carbon bearing (bearing) 31 rotor

Claims (2)

[Claims] 1. An outer tube for taking in a liquid containing a solid content from an inlet, an inflow port disposed inside the outer tube and leading to the inside of the outer tube, and a feeder passing through the outer tube and leading to the outside. An inner tube having an outlet, a shaft disposed inside the inner tube and fitted with a detachable sleeve in the middle, a drive source for rotating the shaft, and the liquid flowing from the inlet of the outer tube. A centrifugal pump that rotates the impeller by rotation of the shaft so as to suck and send the fluid from the inlet to the outlet of the inner tube; and the shaft supported by a bearing supported by a support plate extending from the inner tube; A vertical pump having a shake preventing portion that lubricates between the bearing and the sleeve with the liquid, comprising a rotating blade on a flow passage upstream side of a shaft of the shake preventing portion, and the rotation of the shaft causes centrifugal force to be applied to the liquid. In the liquid A vertical pump characterized in that the solid content of (1) is made to flow to the peripheral side of the inner tube. 2. An outer tube for taking in a liquid containing a solid content from an inlet, an inflow port disposed inside the outer tube and leading to the inside of the outer tube, and a feeder passing through the outer tube and leading to the outside. An inner tube having an outlet, a shaft disposed inside the inner tube and fitted with a detachable sleeve in the middle, a drive source for rotating the shaft, and the liquid flowing from the inlet of the outer tube. A centrifugal pump that rotates the impeller by rotation of the shaft so as to suck and send the fluid from the inlet to the outlet of the inner tube; and the shaft supported by a bearing supported by a support plate extending from the inner tube; A vertical pump having a detent portion for lubricating the space between the bearing and the sleeve with the liquid, comprising a rotating blade on the upstream side of the flow path of the sleeve of the detent portion, wherein the rotation of the shaft with the sleeve causes the liquid to rotate. Centrifugal force A vertical pump characterized by causing solids in the liquid to flow to the peripheral side of the inner tube.