KR101827295B1 - Pump for Circulating Hot Water - Google Patents

Abstract

The present invention relates to a pump for circulating hot water. More specifically, the pump for circulating hot water is capable of discharging a part of fluid and air introduced into a lower portion of a pump chamber through a fluid discharge port without the loss of discharge pressure, such that the fluid smoothly flows, thereby improving the lifting efficiency of the pump and preventing the damage to an impeller, and thus, the durability of the impeller is enhanced. The pump for circulating hot water comprises: an upper housing having an inlet and an outlet to and from which the fluid is introduced and discharged and an upper shaft support portion formed on an inner central portion thereof; a lower housing disposed and installed corresponding to a lower side of the upper housing and having an accommodation space formed therein; an inner housing having an edge portion interposed on the upper and lower housings and a shaft support portion formed on a lower central portion of the bottom portion of an impeller accommodation groove formed in a central portion; the impeller accommodated in the upper housing and the impeller accommodation groove to be able to rotate, such that a fluid passage for the transfer of the fluid is formed between the inner surface of the inner housing and the impeller; a rotor installed on an inner side of an outer circumference of the impeller; and a stator installed in an accommodation space between the inner housing and the lower housing, wherein the stator is disposed corresponding to the rotor. Moreover, rotating blades are installed at regular intervals on an outer circumference of a rotor accommodation portion having a rotor accommodation space which is formed in a lower circumference of a body of the impeller, such that the fluid in the fluid passage is discharged upward.

Description

[0001] Pump for Circulating Hot Water [

The present invention relates to a hot water circulation pump, and more particularly to a hot water circulation pump that discharges a part of fluid and air entering a lower portion of a pump chamber to a fluid outlet without loss of discharge pressure, And at the same time to prevent damage to the impeller and to improve durability.

Generally, a centrifugal pump is used as a hot water circulation pump used as a feed pump of a low-pressure boiler. Such a hot water circulation pump is disclosed in the prior art Patent No. 10-1204344. In this patent, the impeller is rotated by the electromagnetic induction action between the stator and the rotor, so that the fluid (water) flows into the suction port side of the bottom of the water tank, and then the passage between the blade piece of the impeller body and the impeller upper cover And the fluid introduced along the discharge line via the discharge port is heated according to the heating action of the heating means and is then transferred to a use place such as a heating mat through the connection line.

Particularly, in the prior art, a plurality of exhaust holes are formed in the impeller communicating with the flow path so that the fluid in the flow path formed between the outer surface of the impeller body and the impeller receiving groove of the inner housing is exhausted upward. Respectively.

Therefore, in the prior art, a part of the hot water (a part of the fluid) and air contained in the hot water discharged through the passage between the blade piece and the impeller upper cover during the pumping operation of the impeller are guided to the outer surface of the impeller body, So that cavitation does not occur in the flow path even when the impeller rotates at a high speed, so that the hot water is circulated smoothly, and the flow of the hot water is smoothly circulated in the impeller body, The lifting of the impeller is prevented, so that vibration or noise generated due to the contact of the inner surface of the upper housing or the adjacent parts due to the rise of the impeller can be blocked.

However, since part of the hot water introduced into the flow path and air are exhausted through the plurality of exhaust holes passing through the impeller up and down at the time of driving the impeller by the blade of the impeller, the pressure of some hot water rising along the exhaust hole So that a large pressure difference occurs before and after the impeller blade is rotated at high speed, resulting in a rotation disturbing action that hinders the rotation of the impeller blade.

Therefore, since the flow of the fluid is not smooth due to the reduction of the impeller rotating force, there is a problem that the lifting efficiency is largely lowered due to the loss of the discharge pressure discharged to the discharge port, the noise generated during rotation of the impeller and excessive vibration, And the durability of the impeller is greatly lowered due to the damage of the blade.

In the present invention, since some hot water and air introduced into the flow path are discharged regardless of the blades of the impeller, the suction and discharge pressure differences of the fluid are made equal to each other to prevent damage to the impeller, So that the smooth flow of the fluid is promoted and the lift efficiency of the hot water circulation pump is greatly increased.

The present invention includes an upper housing (10) having a fluid inlet (11) and an outlet (12) formed therein and having an upper shaft support portion inside the middle;

A lower housing 20 disposed corresponding to a lower side of the upper housing 10 and having a housing space therein;

An inner housing 30 having an edge portion at the upper and lower housings 10 and 20 and a shaft supporting portion 32 formed at a lower center of the bottom of the impeller receiving groove 31 formed at the center portion;

And is rotatably received in the inside of the upper housing 10 and the impeller receiving groove 31 so that a flow path 40 for fluid flow is formed between the inner housing 30 and the inner surface of the inner housing 30. [ An impeller 50;

A rotor 60 installed inside the outer periphery of the impeller 50; And

And a stator 70 installed in a receiving space between the inner housing 30 and the lower housing 20 corresponding to the rotor 60.

The rotor accommodating portion 51d having the rotor accommodating space 51d 'formed around the lower portion of the body 51 of the impeller 50 so that the fluid in the flow path 40 is exhausted upward, And the rotary vane 52 may be provided around the outer periphery at regular intervals.

In the present invention, it is preferable that a spiral guide groove 33 is formed around the inner side surface of the inner housing 30.

In the present invention, some hot water (fluid) and air entering the flow path are raised and rotated by rotating a rotary blade below the impeller body, thereby allowing the impeller blade to rotate smoothly without rotation disturbing pressure, It is possible to keep the car the same and to prevent the damage to the impeller, and as a result, the durability of the impeller can be greatly improved.

Further, since there is no pressure due to hot water in the flow path applied to the impeller blade, the rotation of the impeller can be smoothly performed, and excessive vibration and noise generated in the blade blade can be suppressed.

Further, in the present invention, some hot water in the flow path is crushed by the rotation of the rotary blades driven by the impeller, irrespective of the blades of the impeller, and is rapidly mixed and discharged through the discharge port by the suction force of the blades of the impeller. It is possible to eliminate the loss of the discharge pressure and smooth the flow of the fluid, thereby significantly increasing the lifting efficiency of the pump.

1 is a perspective view of a hot water circulation pump according to the present invention.
FIG. 2 is a perspective view of the hot water circulation pump according to the present invention in exploded view.
3 is a perspective view showing an impeller of a hot water circulation pump according to the present invention.
4 is a plan sectional view showing the impeller body of the hot water circulation pump according to the present invention.
5 is a longitudinal sectional view of a hot water circulation pump according to the present invention.
6 is a longitudinal sectional view of another embodiment of the hot water circulation pump according to the present invention.

FIG. 3 is a perspective view of an impeller according to the present invention, FIG. 4 is a sectional view of an impeller body according to the present invention, and FIG. 5 is a cross- 6 is a longitudinal sectional view according to another embodiment of the present invention. Embodiments of the present invention will be described in detail with reference to the drawings.

The present invention relates to a hot water circulation pump (100), comprising: an upper housing (10) formed with a fluid inlet (11) and a discharge opening (12)

A lower housing 20 disposed corresponding to a lower side of the upper housing 10 and having a housing space therein;

An inner housing 30 having an edge portion at the upper and lower housings 10 and 20 and a shaft supporting portion 32 formed at a lower center of the bottom of the impeller receiving groove 31 formed at the center portion;

And is rotatably received in the inside of the upper housing 10 and the impeller receiving groove 31 so that a flow path 40 for fluid flow is formed between the inner housing 30 and the inner surface of the inner housing 30. [ An impeller 50;

A rotor 60 installed inside the outer periphery of the impeller 50; And a stator 70 installed in a receiving space between the inner housing 30 and the lower housing 20 corresponding to the rotor 60.

The present invention is characterized in that the rotor accommodating space 51d having a rotor accommodating space 51d 'formed around the lower portion of the body 51 of the impeller 50 is disposed outside the rotor accommodating portion 51d And a plurality of rotating blades 52 are provided at regular intervals around the pump part and the motor part for performing the pumping action are integrally formed in one body.

The upper housing 10 is formed with a suction port 11 and a discharge port 12 for the fluid and has an upper shaft support part formed inside the center part. The center housing has a central protrusion protruding in the shape of a circular cap at its center, And a flange portion for fastening with the housing 30 is formed. The suction port 11 protrudes in the form of a pipe in a direction toward the inside of the central protrusion and the discharge port 12 protrudes in a pipe shape perpendicular to the suction port 11 so as to communicate with the inner space on the side of the impeller 50 have.

The lower housing 20 is formed to be disposed on the lower side of the upper housing 10. The lower housing 20 is formed in a cylindrical shape which is hermetically closed downward to form a receiving space therein, (32) is seated and a fixing hole portion into which the fastening member is inserted is formed.

The inner housing 30 is installed between the upper and lower housings 10 and 20 and has an impeller receiving groove 31 for accommodating the impeller 50 at a central portion thereof. 31 are formed at the center of the bottom of the bottom portion.

A housing space for installing the stator 70 is formed in the outer periphery of the inner housing 30 in a state where the inner housing 30 is inserted into the lower housing 20. A lower housing 20 is provided at a lower portion of the shaft support 32, And a fastening hole for fastening member fastened through the fixing hole side of the fastening hole.

The impeller 50 is rotatably inserted into the upper housing 10 and the impeller receiving groove 31 to perform a substantial pumping action. The impeller 50 is rotatably inserted into the inner surface of the inner housing 30 A flow path 40 is formed.

The flow path 40 is divided into a lateral flow path 40a and a lower flow path 40b in order to describe the technical concept of the present invention in detail.

The impeller 50 includes an impeller body 51, an impeller rotating shaft 55 installed on the impeller body 51, an impeller upper cover 56 provided at the upper and lower portions of the impeller body 51, (57).

The impeller body 51 has a cylindrical body 51 having a shaft insertion hole 51a formed therein and an inlet groove 51b formed in an upper portion of the body, The rotor 60 is embedded in and accommodated in the accommodating space 51d 'of the electron accepting portion 51d while a plurality of blade pieces 53 are formed around the upper portion of the body on which the inlet groove 51b is formed.

A fastening hole for fastening the impeller upper cover 56 is formed on the upper surface of the blade piece 53.

Particularly, in the conventional pump, in the suction and discharge of the fluid, the air contained in some fluids and fluids entering the side-circumferential flow path 40a enters the lower flow path 40b outside the lower portion of the impeller body 51, The bubbles are generated when the pump is driven by the collected fluid. As a result, noise and excessive vibration may be generated, thereby causing the pump efficiency to be lowered. However, in order to solve this problem The impeller 50 of the present invention is disposed on the upper portion of the body 51 of the impeller 50 so that the fluid in the flow path 40 is exhausted upward. A plurality of rotary blades 52 may be provided around the outer periphery of the lower rotor accommodating portion 51d of the body 51 at regular intervals to drive the blades 53 when the impeller 50 is driven,The blades 53 simultaneously rotate the front blades 52 in the same direction so that the fluid flowing into the inlet 11 is discharged to the outlet 12 side and the rotary blades 52 are moved to the side peripheral flow passage 40a A part of the fluid to be infiltrated can be mixed and discharged to the discharge port 12 side by the suction force by the rotation of the blade piece 53 while being crushed by the rotary blade between the inner side surface of the inner housing 30 and the outer side of the rotary blade 52 The fluid in the case where some other fluid is collected in the lower flow path 40b is also rotated by the rotating rotary vane 52 so that the side peripheral flow between the inner side surface of the inner housing 30 and the outer side of the rotary vane 52 And the raised fluid may be mixed and discharged toward the discharge port 12 while being crushed by the rotating blades 52 as described above.

Accordingly, when the impeller 50 is rotated at a high speed, some fluid and air staying in the flow path 40 are quickly pulverized by the rotary vane 52, So that a part of the fluid that is raised and discharged to the blade piece 53 of the impeller 50 is discharged without collision to maintain smooth fluid flow while maintaining the rotational force of the blade piece 53. As a result, The pumping performance can be performed without loss of the pump, thereby improving the heading efficiency as much as possible.

6, a spiral guide groove 33 is formed around the inner side surface of the inner housing 30 so that a part of the fluid collected in the lower flow path 40b is rotated by a rotating blade 52 can be raised while being rotated while being guided to the helical guide groove 33 so as to be discharged upwardly.

That is, some fluid collected in the lower flow path 40b moves in one direction of the lower flow path 40b by the rotation of the rotary vane 52 and rises along the helical guide groove 33, The rising speed of the fluid rising along the inner surface of the pumping means can be increased more rapidly than the rising speed of the fluid rising along the inner surface of the pumping means.

On the other hand, the impeller rotating shaft 55 is provided on the outer peripheral surface thereof and constitutes a shaft supporting member 51c to be inserted into the shaft insertion hole 51a.

The impeller upper cover 56 includes an engaging boss 56a inserted into the fastening hole formed in the blade piece 53 on the bottom surface of the body having a disk shape and an engaging boss 56b inserted into the inlet port 11 and the inlet grooves of the impeller body 51 51b are formed in the through-hole 56b.

Further, the impeller lower cover 57 is configured to be coupled to the bottom of the impeller body 51 so that the side of the rotor accommodating space 51d 'is hermetically sealed. Reference numeral 57a denotes a rotary shaft passage hole, and 57b denotes a fitting projection.

The rotor 60 is installed inside the outer periphery of the impeller 50 and is composed of a circular ring magnet having N poles and S poles repeatedly magnetized, (51d ').

The stator 70 includes a core 71 wound around the rotor 60 to be installed at a position corresponding to the rotor 60 for electromagnetic induction with the rotor 60, And a lower core support member 73 coupled to the lower portion to support the lower side of the core 71. The core 71 has an overall circular ring shape as a whole The upper and lower core support members 72 and 73 are formed by protruding a plurality of guide protrusions on the upper and lower surfaces of the ring-shaped disc. In the figure, reference numeral 80 denotes a circuit board, and 90 denotes a power supply connector.

In the above description, the hot water circulating pump 100 for performing the pumping operation for circulating the heated hot water to the use of the heating mat or the like is described, but the present invention can be applied to a circulating pump for sucking and discharging a fluid other than hot water And a description of the heating means according to the power supply added to the hot water circulation pump will be omitted.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various modifications and applications are possible. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

100: hot water circulation pump 10: upper housing
11: inlet 12: outlet
20: lower housing 30: inner housing
31: impeller receiving groove 32: shaft supporting portion
33: helical guide groove 40: flow path
50: impeller 51: body
51a: shaft insertion hole 51b: inlet groove
51c: shaft support member 51d: rotor receiving portion
51d ': rotor accommodating space 52: rotary blade
53: Reinforcing blade 55:
56, 57: Upper and lower cover 60: Rotor
70: stator 71: core
72, 73: upper and lower core supporting members 80: circuit board
90: Power supply connector

Claims (3)

An upper housing 10 having a fluid inlet 11 and an outlet 12 formed therein and having an upper shaft support portion inside the middle;
A lower housing 20 disposed corresponding to a lower side of the upper housing 10 and having a housing space therein;
An inner housing 30 having an edge portion at the upper and lower housings 10 and 20 and a shaft supporting portion 32 formed at the center of the bottom of the bottom of the impeller receiving groove 31 formed at the central portion;
And is rotatably received in the inside of the upper housing 10 and the impeller receiving groove 31 so that a flow path 40 for fluid flow is formed between the inner housing 30 and the inner surface of the inner housing 30. [ An impeller 50;
A rotor 60 installed inside the outer periphery of the impeller 50; And
And a stator (70) installed in a receiving space between the inner housing (30) and the lower housing (20) corresponding to the rotor (60)
A rotor accommodating portion 51d having a rotor accommodating space 51d 'formed around the lower portion of the body 51 of the impeller 50 is formed with a constant diameter on the outer circumference of the rotor accommodating portion 51d, And a plurality of rotary blades (52) are provided at intervals,
The blade piece 53 formed on the upper portion of the body 51 of the impeller 50 discharges the fluid flowing into the suction port 11 to the discharge port 12 side and the rotary blade 52 is connected to the flow path 40) is raised to the side peripheral flow path (40a) between the inner side surface of the inner housing (30) and the outer side of the rotary vane (52) and discharged to the discharge port (12) side. delete The hot water circulation pump according to claim 1, wherein a spiral guide groove (33) is formed around the inner side surface of the inner housing (30).

Images