KR101453972B1 - Submersible pump with a spacer - Google Patents

Submersible pump with a spacer Download PDF

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Publication number
KR101453972B1
KR101453972B1 KR1020140054594A KR20140054594A KR101453972B1 KR 101453972 B1 KR101453972 B1 KR 101453972B1 KR 1020140054594 A KR1020140054594 A KR 1020140054594A KR 20140054594 A KR20140054594 A KR 20140054594A KR 101453972 B1 KR101453972 B1 KR 101453972B1
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KR
South Korea
Prior art keywords
lower casing
impeller
casing
spacer
wear ring
Prior art date
Application number
KR1020140054594A
Other languages
Korean (ko)
Inventor
김윤완
Original Assignee
신신이앤지(주)
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Priority to KR1020140054594A priority Critical patent/KR101453972B1/en
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Publication of KR101453972B1 publication Critical patent/KR101453972B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/406—Casings; Connections of working fluid especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/466—Fluid-guiding means, e.g. diffusers adjustable especially adapted for liquid fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/56—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/566—Fluid-guiding means, e.g. diffusers adjustable specially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2210/00—Working fluids
    • F05D2210/10—Kind or type
    • F05D2210/11—Kind or type liquid, i.e. incompressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/60—Fluid transfer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The present invention relates to a submersible pump and, more particularly, to a submersible pump provided with a spacer. According to the present invention, a thickness of the spacer that is inserted between impeller-mounted upper and lower casings is used to adjust a gap between an impeller and a wearing. The submersible pump provided with a spacer according to the present invention includes the lower casing; the wearing that is mounted on an inner circumferential surface of the lower casing with an inner diameter decreasing toward a lower end portion of the lower casing; the impeller that is arranged to be rotatable in the lower casing and pulls up water at a lower end of the lower casing toward an upper end of the lower casing; the upper casing that is fastened to the lower casing at the upper end of the lower casing so that the impeller is built thereinto; and the spacer that is inserted between the lower casing and the upper casing. The gap between the impeller and the wearing is adjusted by changing the thickness of the spacer. An inner diameter of an upper end portion of the lower casing is equal to the inner diameter of the lower end portion of the lower casing. An outer diameter of an upper end portion of the wearing is equal to an outer diameter of a lower end portion of the wearing.

Description

SUBMERSIBLE PUMP WITH A SPACER "

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underwater pump, and more particularly, to an axial flow or a multistage pump.

Generally, a pump includes a motor that converts electrical energy into kinetic energy, and is a device for pumping water from a lowland to a highland through a rotating impeller driven by a rotational force generated by the motor.

The pump is installed on the path of the low and high altitudes connected to each other through a pipe or the like to supply the water of the low low point to the high ground, and in particular, the pump installed in the water is called an underwater pump.

The submersible pumps include various types such as an axial flow pump, a sludge pump, and the like.

FIG. 1 is a cross-sectional view of a conventional axial flow pump, and FIG. 2 is a cross-sectional view of one embodiment of a conventional double flow pump.

The axial flow pump or the secondary flow pump is installed in the pipe in the water, and is a large-capacity pump mainly used in a drainage pump or sewage treatment plant. The axial flow pump and the hydrodynamic pump are classified according to the heading, that is, the height at which the water is pumped up. The axial flow is operated at less than 10 m, where the head is relatively low.

That is, the axial flow pump is used when the suction and discharge flow rates are very large and the head is low, and the sludge pump is a device that uses a centrifugal force and a squeezing force generated by an impeller rotating with power from the outside, Function.

Generally, the shape of the impeller 20 used in the axial flow pump has a different shape from that of the impeller 20 used in the extruder pump, since the specific velocity of the fluid is large in the axial flow pump.

In order to prevent the fluid on the discharge side of the impeller 20 from flowing back to the suction side in a submerged pump such as an axial flow pump or a sludge pump, a non-contact wear ring ) 10 are installed. It is difficult for the wearer 10 to completely prevent the flow on the discharge side from returning to the suction side. However, the radial clearance acts like an annular orifice that regulates flow by the pressure drop between the inlet and outlet sides.

Therefore, the smaller the clearance between the wear ring 10 and the impeller 20, the smaller the amount of leakage as the suction side. However, since the wear ring 10 and the impeller 20 are liable to cause rubbing, it is necessary to maintain an appropriate minimum clearance.

However, when the submerged pump is used for a long time, the gap between the wearer 10 and the impeller 20 is increased by the contact between the wearer 10 and the impeller 20, thereby reducing the efficiency of the submersible pump . That is, when the submerged pump is operated, the clearance between the impeller 20 and the wear ring 10 is worn out, and such wear has a great influence on the efficiency of the pump.

1, the gap between the impeller 20 and the wear ring 10 is difficult to maintain because the impeller 20 and the wear ring 10 are vertically structured. The conventional underwater pump as described above is disclosed in Application No. 10-2011-0088344.

Disclosure of the Invention The present invention has been proposed in order to solve the above-described problems, and it is an object of the present invention to provide an air conditioner having a spacer capable of adjusting an interval between an impeller and a wear ring by using a thickness of a spacer inserted between an upper casing and a lower casing, The present invention is directed to providing a pump.

According to an aspect of the present invention, there is provided an underwater pump including a spacer, A wear ring mounted on an inner circumferential surface of the lower casing and having an inner diameter decreasing toward a lower end of the lower casing; An impeller rotatably disposed in the lower casing and lifting up the water at the lower end of the lower casing toward the upper end of the lower casing; An upper casing coupled to the lower casing at an upper end of the lower casing so that the impeller is embedded; And a spacer inserted between the lower casing and the upper casing, wherein a gap between the impeller and the wearer is adjusted by changing the thickness of the spacer, wherein inner diameters of the upper end and the lower end of the lower casing are the same, The outer diameter of the upper end and the lower end of the wear ring are the same.

According to another aspect of the present invention, there is provided a submersible pump having a spacer, comprising: a lower casing; A wear ring mounted on an inner circumferential surface of the lower casing and having an inner diameter decreasing toward a lower end of the lower casing; An impeller rotatably disposed in the lower casing and lifting up the water at the lower end of the lower casing toward the upper end of the lower casing; An upper casing coupled to the lower casing at an upper end of the lower casing so that the impeller is embedded; And a spacer inserted between the lower casing and the upper casing. The gap between the impeller and the wearer is adjusted by changing the thickness of the spacer, and the inner diameter of the lower casing decreases toward the lower end of the lower casing And the outer diameter of the wear ring becomes smaller toward the lower end of the lower casing.

According to another aspect of the present invention, there is provided a submersible pump having a spacer, the submerged pump comprising: a lower casing having an inner diameter decreasing toward a lower end; An impeller rotatably installed in the lower casing and lifting the water at the lower end of the lower casing toward the upper end of the lower casing; An upper casing coupled to the lower casing at an upper end of the lower casing so that the impeller is embedded; And a spacer inserted between the lower casing and the upper casing, wherein the gap between the impeller and the lower casing is adjusted by changing the thickness of the spacer.

According to the present invention, since the interval between the impeller mounted on the submersible pump and the wear ring can be changed by a simple method, the performance of the pump can be maintained uniformly.

That is, according to the present invention, when a clearance between the impeller and the wear ring is opened, a spacer capable of easily and easily adjusting the gap can be mounted between the upper casing and the lower casing. So that the efficiency of the underwater pump can be maintained uniform.

1 is a sectional view of a conventional axial flow pump in an embodiment;
2 is a cross-sectional view of one embodiment of a conventional multistage pump.
3 is an exemplary view showing a state in which an underwater pump having a spacer according to the present invention is used.
Fig. 4 is another example of a state in which an underwater pump having a spacer according to the present invention is used. Fig.
5 is a sectional view of an embodiment of a submersible pump having a spacer according to the first embodiment of the present invention.
FIG. 6 is an exemplary view illustrating a wetting applied to an underwater pump having a spacer according to a first embodiment of the present invention, compared with a conventional wetting; FIG.
FIG. 7 is an illustration showing a spacer applied to an underwater pump having a spacer according to a first embodiment of the present invention; FIG.
FIG. 8 is an exemplary view for explaining a method of controlling a distance between a wear ring and an impeller in an underwater pump having a spacer according to a first embodiment of the present invention; FIG.
9 is a sectional view of an embodiment of a submersible pump having a spacer according to a second embodiment of the present invention.
10 is a sectional view of an embodiment of an underwater pump having a spacer according to a third embodiment of the present invention.
11 is a sectional view of an embodiment of a submersible pump having a spacer according to a fourth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is an exemplary view showing a state in which an underwater pump having a spacer according to the present invention is used, and in particular, an axial flow pump is used. FIG. FIG. 4 is a view showing still another example in which a submersible pump having a spacer according to the present invention is used. FIG. 4 is an exemplary view showing a state in which a subsidiary pump is used in particular.

3 and 4, the submersible pump 100 having a spacer according to the present invention is a device for pumping low-lying water to a high ground, and is installed inside a pipe 200 in water and used .

The submersible pump 100 having a spacer according to the present invention can be used in a drainage pumping station, a sewage treatment plant, etc., and can be divided into an axial flow pump and a submerged pump according to the height at which the water is pumped up, that is, the head. An underwater pump 100 having a spacer according to the present invention shown in Fig. 3 is an axial flow pump, and is operated at 10 m or less in which the head is comparatively low. Further, the submersible pump 100 having the spacer according to the present invention shown in Fig. 4 is a multistage pump, which is operated at 10 m or more, where the head is comparatively high.

5 is a cross-sectional view of an embodiment of an underwater pump having a spacer according to a first embodiment of the present invention, in particular, a sectional view of an axial flow pump in an embodiment. FIG. 6 is an exemplary view showing a wearer applied to an underwater pump having a spacer according to a first embodiment of the present invention, in comparison with a conventional wear ring. FIG. 6A shows a cross section of a wear ring applied to a conventional underwater pump (b) shows a section of the wear ring 110 applied to the present invention. 7 is a view showing an example of a spacer applied to an underwater pump having a spacer according to a first embodiment of the present invention, wherein (a) is a plan view and (b) is a side view. 8A and 8B are diagrams for explaining a method of adjusting a distance between a wear ring and an impeller in a submersible pump having a spacer according to a first embodiment of the present invention, (B) shows an axial flow pump equipped with a spacer 150 whose thickness is reduced by K after the inner circumferential surface (In) of the wear ring 110 is worn.

5 to 8, a submersible pump 100 having a spacer according to the present invention includes a lower casing 130, an outer casing 130 mounted on an inner peripheral surface of the lower casing 130, A water ring 110 rotatably mounted in the lower casing 130 so that water W at a lower end of the lower casing 130 is directed toward the upper end of the lower casing 130, An upper casing 140 which is coupled to the lower casing at an upper end of the lower casing so that the impeller 120 is embedded therein and a lower casing 130 which is inserted between the lower casing 130 and the upper casing 140 The gap between the impeller 120 and the wearer 110 can be adjusted by changing the thickness of the spacer 150.

The lower casing 130 is coupled to the upper casing 140 by a coupling part 160 and the impeller 120 is inserted into an inner space formed by the lower casing 130 and the upper casing 140. [ Respectively. In particular, the impeller 120 may be fixedly mounted to the upper casing 140.

The wearer 110 is mounted on the inner circumferential surface of the lower casing 130.

The spacer 150 is disposed at a portion where the lower casing 130 and the upper casing 140 abut each other.

Particularly, the submerged pump having the spacer according to the first embodiment of the present invention is an axial flow pump. The inner diameter of the upper end portion and the lower end portion of the lower casing 130 constituting the axial flow pump are formed to be the same.

In this case, the outer diameter of the upper end portion and the lower end portion of the wear ring 110 mounted on the inner circumferential surface of the lower casing 130 is the same, and the wear ring 110 has an inner diameter Respectively. That is, since the inner diameter of the upper end portion of the lower casing 130 is the same as the inner diameter of the lower end portion, the outer diameter of the upper end portion of the wear ring 110 and the outer diameter Y of the lower end portion are formed to be the same. Here, the outer diameter Y refers to the diameter formed by the outer circumferential Out of the wear ring 110, as shown in FIG. However, according to the present invention, the inner diameter X of the wear ring 110 is reduced from the upper end to the lower end of the wear ring 110. Here, the inner diameter X refers to a diameter formed by the inner circumferential surface In of the wear ring 110, as shown in FIG.

In the underwater pump according to the present invention, a contactless wear ring or a liner ring is provided between the impeller 120 and the lower casing 130 to prevent the fluid on the discharge side of the impeller 120 from flowing back to the suction side. (110).

The wearer 110 functions to prevent the flow on the discharge side from returning to the suction side. The distance between the wearer 110 and the impeller 120 is as small as possible.

That is, as the clearance between the wearer 110 and the impeller 120 is reduced, the leakage amount as the suction side is reduced.

However, when the underwater pump according to the present invention is used for a long time, the contact between the wear ring 110 and the impeller 120 or the contact between the wear ring 110 and the impeller 120 at a high speed The inner circumferential surface In of the wear ring 110 is cut by various kinds of heavy metals or foreign substances contained in the water so that the inner circumferential surface In of the wear ring 110 and the impeller 120 are increased.

In particular, since the inner circumferential surface In of the wear ring 110 is exposed to water flowing at a high speed or various kinds of heavy metals or foreign substances contained in the water, Wear on both the upper and lower ends of the wear ring 110 may occur.

That is, the inner circumferential surface In of the wear ring 110 may be worn not only by the contact of the impeller 120 but also by the friction with the water W. In this case, The abrasion may occur in all of the inner circumferential surfaces In.

If the gap between the inner circumferential surface In of the wear ring 110 and the end P of the impeller 120 is increased by the wear of the inner circumferential surface In of the wear ring 110, do. That is, when the submerged pump is operated, the clearance between the impeller 120 and the end P of the wear ring 110 is opened by wear of the wear ring 110 or the impeller 120, The efficiency of the system is greatly influenced.

In particular, the impeller and the wear ring of the axial flow pump have a vertical structure, and it is difficult to maintain the gap.

In order to solve this problem, in the submerged pump (axial flow pump) having the spacer according to the first embodiment of the present invention as shown in FIG. 5, the inner circumferential surface of the wearer 110 In, the gap between the wearer 110 and the impeller 120 can be adjusted by adjusting the height of the impeller 120.

In this case, an angle of an end P of the surface of the impeller 120 which is in contact with the inner circumferential surface In of the wearer 110 is equal to an angle formed by the inner circumferential surface In of the wearer 110 .

In the underwater pump having the spacer according to the first embodiment of the present invention, a gap between the impeller 120 and the wearer 110 is maintained as follows.

The underwater pump with the spacer according to the first embodiment of the present invention is periodically inspected and the gap between the impeller 120 and the wearer 110 is measured during the inspection.

The gap between the end P of the impeller 120 and the inner circumferential surface In of the wearer 110 can be increased by various causes as described above. In other words, due to various causes as described above, wear occurs at almost all the surfaces from the upper end to the lower end of the inner circumferential surface In of the wearer 110, so that the end P of the impeller 120, The interval between the inner circumferential surfaces In becomes larger.

At this time, if it is determined that the gap, that is, the gap is larger than the preset value, the manager loosens the coupling part 160 and separates the spacer 150.

As shown in FIG. 7, the spacer 150 has the same shape as the sectional structure of the lower casing 130 and the upper casing 140, and has a constant thickness D.

The manager processes the thickness D of the separated spacer 150 in consideration of the gap. In this case, the thickness of the spacer 150 is reduced by K shown in Fig. That is, the variation K in the thickness shown in the enlarged circle shown in the upper part of FIG. 8 shows a change in the thickness of the spacer 150.

The manager mounts the spacer 150 having the reduced thickness D again between the lower casing 130 and the upper casing 140 and then uses the coupling portion 160 to again move the lower portion And the casing (130) and the upper casing (140) are tightened.

In this case, since the thickness D of the spacer 150 is reduced by K, the gap between the upper casing 140 and the lower casing 130, which is fastened with the spacer 150 therebetween, .

That is, the upper casing 140 shown in FIG. 8 (b) is moved in the lower direction of FIG. 8 by K in comparison with the upper casing 140 shown in FIG. 8 (a) .

Accordingly, the impeller 120 mounted on the upper casing 140 is lowered by K in the direction of the lower casing 130, as shown in FIG. 8 (b).

8 (a) is a cross-sectional view of a submerged pump having a spacer according to the first embodiment of the present invention before the thickness D of the spacer 150 is reduced, and FIG. 8 (b) And the end P of the impeller 120 is positioned at the lower end of the lower casing 130 as the thickness of the spacer 150 is reduced. As shown in FIG.

As the end P of the impeller 120 is moved in the lower end direction of the wearing 110 in a state where the wear ring 110 is fixed to the lower casing 130, The distance between the end P and the inner circumferential surface In of the wearer 110 can be reduced.

The inner diameter X of the wearing 110 mounted on the lower casing 130 decreases as it goes to the lower end of the lower casing 130 or the wearing 110. In other words, The angle of the end P of the surface of the impeller 120 that is in contact with the inner circumferential surface In of the wear ring 110 is the same as the angle formed by the inner circumferential surface In of the wear ring 110 . In addition, since the entire inner circumferential surface In of the wear ring 110 is worn, the angle formed by the inner circumferential surface of the wear ring 110 does not change greatly.

8, when the thickness of the spacer 150 is reduced by K, when the impeller 120 is moved by K in the direction of the lower end of the wearer 110, The gap between the end P and the inner circumferential surface In of the wearer 110 is reduced.

In other words, since the inner circumferential surface In of the wear ring 110 is worn, the inner diameter X of the lower end of the wear ring 110 becomes larger than the inner diameter before wear. Accordingly, the impeller 120 can be lowered by K than before the wear, and as the impeller 120 is lowered, the inner circumferential surface of the impeller 120 and the wear ring 110 can be more closely contacted .

That is, when the end P of the impeller 120 and the inner circumferential surface In are widened by a predetermined amount or more due to wear of the inner circumferential surface In of the wearer 110, D), the impeller 120 can be further lowered toward the lower end of the inner circumferential surface In. In this case, since the inner diameter of the lower end portion of the inner circumferential surface is increased by abrasion of the inner circumferential surface In, the impeller 120 can be moved toward the lower end of the wearer 110.

Therefore, the clearance between the impeller 120 and the wearer 110 is reduced, so that the efficiency of the underwater pump can be maintained at the initial state.

FIG. 9 is a cross-sectional view of an embodiment of a submersible pump having a spacer according to a second embodiment of the present invention, in particular, a cross-sectional view of one embodiment of a submerged pump.

9, a submersible pump 100 having a spacer according to the present invention comprises a lower casing 130, an inner circumferential surface of the lower casing 130, and a lower end of the lower casing 130 An impeller 120 rotatably mounted in the lower casing 130 and lifting the water at the lower end of the lower casing 130 toward the upper end of the lower casing, An upper casing 140 coupled to the lower casing at an upper end of the lower casing so that the lower casing 130 and the upper casing 140 are embedded, and a spacer 150 inserted between the lower casing 130 and the upper casing 140, The distance between the impeller 120 and the wearer 110 can be adjusted by changing the thickness of the spacer 150.

The underwater pump having the spacer according to the second embodiment of the present invention is different from the first embodiment in that the inner diameter formed by the inner circumferential surface M of the lower casing 130 is smaller than the inner diameter of the lower casing 130, And the outer diameter formed by the outer surface Out of the wear ring 110 becomes smaller toward the lower end of the lower casing 130. [

That is, although the lower casing 130 according to the first embodiment of the present invention is formed in the shape of a straight line, the lower casing 130 applied to the second embodiment of the present invention has the inner circumferential surface M And the inner diameter is reduced.

Therefore, the outer diameter of the wearer 110 mounted on the inner circumferential surface M of the lower casing 130 is also reduced toward the lower end.

However, the shape and inner diameter of the inner circumferential surface In of the wear ring 110 applied to the second embodiment of the present invention are not limited to the shape of the inner circumferential surface In of the wear ring 110 applied to the first embodiment, And is formed similar to the inner diameter.

Accordingly, the method described in the first embodiment can be applied as it is to a method of adjusting the distance between the wearer 110 and the impeller 120. [

FIG. 10 is a sectional view of an embodiment of a submersible pump having a spacer according to a third embodiment of the present invention, in particular, a sectional view of an axial flow pump in an embodiment.

A submersible pump with a spacer according to a third embodiment of the present invention is similar to the submersible pump according to the first embodiment of the present invention described with reference to Figures 5 to 8 except that there is no wear ring 110, And has the same function as the underwater pump.

For example, a submersible pump 100 having a spacer according to a third embodiment of the present invention includes a lower casing 130 having an inner diameter reduced toward the lower end thereof, and a lower casing 130 rotatably mounted in the lower casing 130 An impeller 120 for lifting the water W at the lower end of the lower casing 130 toward the upper end of the lower casing 130 and a lower casing 130 coupled to the lower casing 130 at an upper end of the lower casing to house the impeller 120, (140) and a spacer (150) inserted between the lower casing (130) and the upper casing (140). By changing the thickness of the spacer (150), the impeller (120) The distance between the first and second electrodes 130 and 130 may be adjusted.

That is, in the third embodiment of the present invention, the wearer 110 mounted on a submersible pump having spacers according to the first and second embodiments is omitted. Also, the lower casing 130 functions as the wearer 110.

The inner circumferential surface M of the lower casing 130 is reduced toward the lower end and the end P of the impeller 120 is inclined at an angle of inclination equal to the inclination angle of the inner circumferential surface M of the lower casing 130, Respectively.

When the gap D between the inner circumferential surface M of the lower casing 130 and the distal end P of the impeller 120 is greater than a predetermined value and the thickness D of the spares 150 is reduced, The impeller 120 may be further lowered in the direction of the lower end of the inner circumferential surface M of the lower casing 130. The inner diameter of the lower end of the inner circumferential surface M is increased by abrasion of the inner circumferential surface M of the lower casing 130 so that the impeller 120 can be moved toward the lower end of the lower casing 130 have.

Accordingly, the clearance between the impeller 120 and the lower casing 130 is reduced, so that the efficiency of the underwater pump can be maintained at the initial state.

11 is a cross-sectional view of an embodiment of a submerged pump having a spacer according to a fourth embodiment of the present invention, and particularly, is a cross-sectional view of one embodiment of a submerged pump.

A submerged pump with a spacer according to a fourth embodiment of the present invention is similar to the submerged pump according to the second embodiment of the present invention described with reference to Figure 9 except that there is no wear ring 110 It has the same structure as the submersible pump and performs the same function.

In addition, a submerged pump having a spacer according to a fourth embodiment of the present invention is a submerged pump having a spacer according to the third embodiment of the present invention described with reference to Fig. 10, It has the same configuration as the pump and performs the same function. That is, in the fourth embodiment of the present invention, the wear ring 110 is omitted, and the function of the wear ring 110 is performed by the lower casing 130.

For example, if the spacing between the inner circumferential surface M of the lower casing 130 and the distal end P of the impeller 120 is greater than a predetermined size, reducing the thickness D of the spares 150 , The impeller 120 may be further lowered in the direction of the lower end of the inner circumferential surface M of the lower casing 130. The inner diameter of the lower end of the inner circumferential surface M is increased by abrasion of the inner circumferential surface M of the lower casing 130 so that the impeller 120 can be moved toward the lower end of the lower casing 130 have.

Accordingly, the clearance between the impeller 120 and the lower casing 130 is reduced, so that the efficiency of the underwater pump can be maintained at the initial state.

The characteristics of the submersible pump having the spacer according to the present invention as described above are compared with the conventional submersible pump (Application No. 10-2011-0088344) as follows.

First, in general, the wear ring is brought into close contact with the lower casing, so that even if foreign matter is caught between the impeller and the wear ring, it must be formed in a rigid structure against the impact. Among the conventional techniques, there is an underwater pump (Application No. 10-2011-0088344) in which a gap is formed between the wear ring and the casing to reduce the gap between the wear ring and the impeller. However, such a underwater pump has a problem in that it is vulnerable to impact Have. For example, in the conventional underwater pump as described above, when a strong torque is generated due to a foreign matter between the impeller and the wear ring, the wear ring may be supported only by the force of the bolt fixing the wear ring. However, in the present invention, the wear ring 110 and the lower casing 130 are integrally formed (the third and fourth embodiments), or the wear ring 110 and the lower casing 130 are formed by the tensile force of the bolt, (The first embodiment and the second embodiment) can be structurally stable because they can be brought into close contact with each other by the surface pressure of the wear ring and the casing.

Secondly, according to the present invention, as described above, when the wear ring 110 and the lower casing 130 are integrally formed (the third and fourth embodiments), or the wear ring 110 and the lower casing 130 are formed separately It is possible to perform the same function. That is, in the present invention, when the interval between the wear ring 110 and the impeller 120, or the interval between the lower casing 130 and the impeller 120 integrally formed with the wear ring, The gap between the impeller 120 and the wearer 110 or the lower casing 130 can be reduced by reducing the thickness D of the impeller 120. [ However, the conventional submersible pump must be provided with wear ring.

Thirdly, in the third and fourth embodiments of the present invention, in the absence of the wear ring 110, the lower casing 130 has a function of reducing the gap with respect to the impeller 120 in place of the wear ring 110 Can be performed. Therefore, the structure of the submersible pump according to the present invention can be further simplified.

Fourthly, in the conventional art as described above, in order to reduce the gap between the wear ring and the impeller, a gap is formed between the wear ring and the casing. However, in such a conventional submersible pump, if there is a gap between the wear ring and the lower casing, another pressure leak may occur when the pressure of the pump is increased. In addition, since the conventional underwater pump as described above adjusts the distance between the wear ring and the impeller by adjusting the position of the wear ring, when the wear ring is raised in the upper direction, a gap between the lower part of the wear ring and the lower casing is widened , A vortex can occur in that portion.

Fifth, in the above-described conventional art, the distance between the wear ring and the impeller is controlled by using the thread, but this method can be a work with a low accuracy. The reason for this is that a method of confirming the clearance while tightening the screws in a state in which it is impossible to confirm with eyes may require expertise in the operator. However, in the case of the present invention, the worker's mistakes that may occur in the gap check and height machining can be cut off entirely. In other words, when the present invention is applied, the manager directly visually confirms the gap between the wear ring (or the lower casing) and the impeller 120, and then determines the thickness D of the spacer 150 The gap between the wearer 110, the lower casing 130, and the impeller 120 can be maintained at an appropriate size. That is, the manager can directly confirm the gap and can process the thickness of the spacer 130 while confirming the thickness of the spacer 130 in consideration of the gap. Therefore, according to the present invention, it is possible to complete the gap adjusting operation more easily since the operator's mistakes that may occur in the gap check and thickness machining can be cut off.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

110: Wear ring 120: Impeller
130: lower casing 140: upper casing
150: spacer 160: fastening part

Claims (3)

A lower casing;
A wear ring mounted on an inner circumferential surface of the lower casing and having an inner diameter decreasing toward a lower end of the lower casing;
An impeller rotatably disposed in the lower casing and lifting up the water at the lower end of the lower casing toward the upper end of the lower casing;
An upper casing coupled to the lower casing at an upper end of the lower casing so that the impeller is embedded; And
And a spacer inserted between the lower casing and the upper casing,
Wherein an inner diameter of the upper end portion and a lower end portion of the lower casing are the same and outer diameters of the upper end portion and the lower end portion of the wear ring are the same and the gap between the impeller and the wear ring can be adjusted by changing the thickness of the spacer. Equipped submersible pumps. A lower casing;
A wear ring mounted on an inner circumferential surface of the lower casing and having an inner diameter decreasing toward a lower end of the lower casing;
An impeller rotatably disposed in the lower casing and lifting up the water at the lower end of the lower casing toward the upper end of the lower casing;
An upper casing coupled to the lower casing at an upper end of the lower casing so that the impeller is embedded; And
And a spacer inserted between the lower casing and the upper casing,
The inner diameter of the lower casing becomes smaller toward the lower end of the lower casing and the outer diameter of the wear ring becomes smaller toward the lower end of the lower casing and the gap between the impeller and the wear ring can be adjusted by changing the thickness of the spacer Wherein the spacer is provided with a spacer. A lower casing having an inner diameter decreasing toward a lower end;
An impeller rotatably installed in the lower casing and lifting the water at the lower end of the lower casing toward the upper end of the lower casing;
An upper casing coupled to the lower casing at an upper end of the lower casing so that the impeller is embedded; And
And a spacer inserted between the lower casing and the upper casing,
And the distance between the impeller and the lower casing can be adjusted by changing the thickness of the spacer.
KR1020140054594A 2014-05-08 2014-05-08 Submersible pump with a spacer KR101453972B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160076064A (en) * 2014-12-22 2016-06-30 삼진공업 주식회사 Submerger motor pump
KR102046318B1 (en) * 2019-08-20 2019-11-19 신신이앤지(주) Submersible pump efficiency compensation system using spacer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6197600U (en) * 1984-12-04 1986-06-23
JP2002021768A (en) 2000-07-04 2002-01-23 Tsurumi Mfg Co Ltd Suction cover in submergible pump and fixing structure for strainer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6197600U (en) * 1984-12-04 1986-06-23
JP2002021768A (en) 2000-07-04 2002-01-23 Tsurumi Mfg Co Ltd Suction cover in submergible pump and fixing structure for strainer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160076064A (en) * 2014-12-22 2016-06-30 삼진공업 주식회사 Submerger motor pump
KR101644472B1 (en) * 2014-12-22 2016-08-01 삼진공업 주식회사 Submerger motor pump
KR102046318B1 (en) * 2019-08-20 2019-11-19 신신이앤지(주) Submersible pump efficiency compensation system using spacer

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