WO2012053714A1

WO2012053714A1 - Pump for boiler

Info

Publication number: WO2012053714A1
Application number: PCT/KR2011/003620
Authority: WO
Inventors: 민태식
Original assignee: 주식회사 경동나비엔
Priority date: 2010-10-19
Filing date: 2011-05-17
Publication date: 2012-04-26
Also published as: KR20120040551A; KR101146952B1

Abstract

The purpose of the present invention is to provide a pump for a boiler which enables reduction in manufacturing costs and improvement of installation and replacement workability by reducing the number of parts of the pump for a boiler and simplifying the coupling structure between the parts. To achieve this purpose, the present invention comprises: a head having an inlet and an outlet for passing heating water therethrough, and an impeller for transferring the heating water introduced through the inlet to the outlet; a motor housing connected to the head and having a shaft axially connected to the impeller, a rotor fixed to the shaft, and a stator provided on the periphery of the rotor so as to rotate the rotor using a magnetic field generated by an applied electric current; and a division housing, provided between the head and the motor housing, for preventing the heating water passing through the inside of the head from being introduced to the motor housing, wherein the motor housing comprises a first motor housing and a second motor housing, and the division housing and the first motor housing are formed into an integral frame.

Description

Boiler Pumps

The present invention relates to a pump for a boiler, and more particularly, to reduce the number of components of the pump to simplify the coupling structure, improve the workability of replacing parts, and to effectively prevent leakage of the circulating heating water to the motor side. To a pump for a conventional boiler.

A boiler is a device that heats water through a combustion process of fuel and supplies it to a heating source. A heating pipe of the heating water is provided with a pump to circulate the heating water.

1 is a partial cross-sectional view showing the internal configuration of a conventional boiler pump.

The inlet 11 and the outlet 12 through which the heating water passes is formed in the upper portion of the conventional boiler pump, the impeller 50 for transferring the heating water introduced into the inlet 11 to the outlet 12 side is inside The head 10 provided in the is located.

The first motor housing 30 and the second motor housing 40 are sequentially coupled to the lower side of the head 10, and the impeller is inside the first motor housing 30 and the second motor housing 40. A shaft 60 coupled to the shaft 50, a rotor 70 fixed to the shaft 60, and a circumference of the rotor 70 are provided through a power supply line 91 from the condenser 90. A stator 80 is provided for rotating the rotor 70 by using a magnetic field generated by the supplied current.

In addition, a division housing 20 is installed between the head 10 and the first motor housing 30 to block leakage of the heating water passing through the head 10 toward the rotor 70 and the stator 80. .

The outer circumferential surface of the inlet 11 at the top of the head 10 is coupled to the O-ring 13 for maintaining airtightness between the inlet 11 and the heating pipe (not shown) fastened.

The division housing 20 is made of a plate-shaped plastic material, the outer end of the division housing 20 is inside the step formed in the portion where the head 10 and the outer end of the first motor housing 30 are coupled. The O-ring 21 is coupled between the top surface of the division housing 20 and the bottom surface of the head 10.

A shaft 60 penetrates up and down in the planar center portion of the division housing 20 and the first motor housing 30, and a mechanical seal 61 for airtightness between the shaft 60 and the division housing 20. And packing 62 are coupled to each other, and the leakage prevention for preventing the leakage of the heating water to the gap between the mechanical seal 61 and the shaft 60 on the outer circumferential surface of the shaft 60 to the lower side of the mechanical seal 61 Ring 63 is provided.

In addition,

bearings

64 and 65 and wave washers 65 are provided between the first motor housing 30, the second motor housing 40, and the shaft 60 to support the shaft 60 to rotate smoothly. It is.

In addition, between the inlet 11 of the head 10 and the heating pipe (not shown), the head 10 and the first motor housing 30, the first motor housing 30 and the second motor housing 40 in a planar manner. It consists of a structure that is fastened to each other by a fastening hole (not shown) and a fastening member (not shown) penetrating the circumference.

The conventional boiler pump configured as described above is composed of a structure in which the division housing 20 and the first motor housing 30 are separated from each other, so that a separate part for joining them is required, thus producing costs. There is a problem that the installation and replacement workability of the parts with the rise of the deterioration, and the position of the division housing 20 is separated from the first fixed installation position due to the water pressure, which may cause damage and leakage of parts. There is this.

In addition, the conventional pump for boiler is provided with a mechanical seal 61 and a leakage preventing ring 63 on the outer circumferential surface of the shaft 60 to block the leakage of the heating water passing through the head 10 to the motor side. When leakage occurs through a minute gap between the shaft 60 and the mechanical seal 61, the leakage prevention ring 63 alone is difficult to completely block the ingress of water due to leakage. There is a problem that there is a possibility of causing an occurrence.

The present invention has been made to solve the above problems, by reducing the number of components constituting the pump for the boiler and simplify the coupling structure between the components can reduce the production cost of the pump and improve the installation and replacement workability It is an object to provide a pump for a boiler.

Another object of the present invention is to provide a pump for a boiler that can prevent the failure of the pump due to leakage by effectively blocking the leakage of the heating water passing through the head to the motor side.

Pump for a boiler of the present invention for realizing the object as described above, the inlet and outlet of the heating water is formed, the head is provided with an impeller for transferring the heating water introduced into the inlet to the outlet side; A stator coupled to the head and having a shaft axially coupled to the impeller, a rotor fixed to the shaft, and a stator for rotating the rotor using a magnetic field generated by an applied current provided around the rotor. Is provided with a motor housing; And a division housing installed between the head and the motor housing to block the heating water passing through the head from flowing into the motor housing side, wherein the motor housing comprises a first motor housing and a second motor housing. The division housing and the first motor housing may be made of an integrated frame.

In this case, the shaft penetrates up and down in the plane central portion of the frame, and a mechanical seal for preventing leakage is coupled to the upper end of the frame through which the shaft penetrates, and the shaft is rotatable at the lower end of the frame through which the shaft penetrates. The supporting bearing may be configured to be combined.

In addition, the frame may be configured to have a leakage outlet for discharging the heating water leaked to the motor housing side through the gap between the shaft and the mechanical seal to the outside of the motor housing.

In addition, the shaft may be composed of a leakage preventing ring for guiding the heating water leaked to the motor housing side through the gap between the shaft and the mechanical seal to the leakage outlet side.

According to the pump for boilers according to the present invention, by configuring the division housing and the motor housing in an integral frame, it is possible to reduce the number of parts constituting the pump for the boiler and to simplify the coupling structure between the parts, thereby reducing the manufacturing cost of the pump It can reduce the cost and improve workability during installation and replacement of parts.

In addition, according to the present invention, by forming a leakage outlet in the frame and having a leakage preventing ring for guiding the leaking heating water to the leakage outlet side by reliably blocking the heating water leakage to the motor side through the gap between the mechanical seal and the shaft to the leakage path There is an effect that can prevent the occurrence of failure of the pump.

1 is a partial cross-sectional view showing the internal configuration of a conventional boiler pump,

2 is a perspective view of a pump for a boiler according to an embodiment of the present invention;

3 is an exploded perspective view of FIG. 2;

Figure 4 is a cross-sectional view showing the internal configuration of the pump for boilers according to an embodiment of the present invention.

** Explanation of Codes **

10,100: head 11,110: inlet

12,120 Outlet 13,21,130,160 O-ring

20,210: division housing 30,220: first motor housing

40,300: second motor housing 50,400: impeller

60,500 shaft 61,510 mechanical seal

62,512 Packing 63,525 Leakage prevention ring

64,65,520,530: Bearing 66,532: Wave Washers

70,600: rotor 80,700: stator

90,800 Capacitor 91,810 Power supply line

140,214,215,312: Fastener 150,314: Fastening member

160a, 230: O-ring mounting hole 200: Frame

212: shaft hole 216: ventilation holes

218: Leakage outlet

Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view of a pump for a boiler according to an embodiment of the present invention, Figure 3 is an exploded perspective view of Figure 2, Figure 4 is a cross-sectional view showing the internal configuration of the pump for a boiler according to an embodiment of the present invention.

An inlet 110 and an outlet 120 through which the heating water passes are formed in the upper portion of the pump for a boiler according to the present invention, and rotates by the power of a motor to supply the heating water introduced into the inlet 110 through the outlet 120. The head 100 having an impeller 400 to be moved to the side is provided therein.

The frame 200 having the division housing 210 and the first motor housing 220 are integrally coupled to the lower side of the head 100, and the second motor housing 300 is coupled to the lower side of the frame 200. do.

The division housing 210 insulates the interior space of the head 100 and the first motor housing 220 while the frame 200 is coupled to the head 100, and passes through the interior of the head 100. It serves to block the leakage of water to the inside of the first motor housing 220.

Unlike the division housing 20 and the first motor housing 30 are configured separately in the pump for a boiler according to the prior art shown in Figure 1, in the present invention, the division housing 210 and the first motor housing 220 It is a technical feature that the casting is made of a single part consisting of the integral frame 200 is configured to reduce the number of parts of the pump and to simplify the coupling structure between the parts.

Inside the frame 200 and the second motor housing 300, the shaft 500 is axially coupled to the impeller 400, the rotor 600 is fixed to the shaft 500 and rotated together, The stator 700 is provided around the rotor 600 and rotates the rotor 600 by using a magnetic field generated by a current supplied from the capacitor 800 through the power supply line 810.

Hereinafter, with reference to Figure 3 will be described in more detail the structure and coupling structure between the components of the present invention.

O-ring mounting hole (160a) is formed on the outer circumferential surface of the inlet port (110) of the top of the head 100, the O-ring mounting hole (160a) is to maintain the airtight between the heating pipe (not shown) fastened to the inlet 110 O-ring 160 is coupled.

A plurality of fastening holes 140 are formed in the edge portion of the head 100 at predetermined intervals along the circumferential direction, and the circumference corresponding to the position where the fastening holes 140 are formed in the upper edge portion of the frame 200. A plurality of fastening holes 214 are formed at predetermined intervals along the direction, and the head 100 and the frame 200 are coupled by fastening members 150 such as bolts penetrating the fastening holes 140 and 214.

O-ring mounting hole 230 is formed on the upper outer circumferential surface of the frame 200, the O-ring 130 is coupled to the inside, the airtight between the upper outer surface of the frame 200 and the lower inner surface of the head 100 This is held in a maintained state.

A shaft hole 212 is formed in the planar center portion of the division housing 210 constituting the upper portion of the frame 200, the shaft 500 is penetrated through the shaft hole 212, the impeller at the top of the shaft 500 The wing central portion of the 400 is axially coupled.

The stepped portion formed inside the shaft hole 212 supports the mechanical seal 510 and its lower end in a space between the shaft 500 protruding through the shaft hole 212 and the inner surface of the shaft hole 212 and maintains airtightness. The packing 512 is combined.

As the mechanical seal 510 and the packing 512 are interposed between the shaft hole 212 and the shaft 500 of the division housing 210 as described above, the heating water passing through the head 100 is in the inner space of the frame 200. To prevent leakage.

However, a minute gap may occur between the shaft 500 and the mechanical seal 510 when the shaft 500 rotates at high speed, and a small amount of heating water may leak through the gap when the water pressure of the heating water increases. If the leaked water flows into the rotor 600 and the stator 700 constituting the motor, the leakage of water may cause a failure of the motor.

In order to prevent the leakage of the heating water more completely, the frame 200 is discharged to the outside of the frame 200, the heating water leaked through the gap between the shaft 500 and the mechanical seal 510. Leakage discharge port 218 is provided.

The leak outlet 218 is formed of a hole penetrating from the outer surface of the frame 200 to the inner space of the shaft hole 212 located in the lower portion of the position where the mechanical seal 510 is installed.

On the drawing, the leak outlet 218 is shown to be formed laterally, in the structure in which the pump is actually coupled to the heating pipe, the leak outlet 218 is installed in the direction toward the ground, the leak outlet 218 Heating water leaked through) falls to the ground and becomes a structure that is discharged smoothly.

In addition, the outer circumferential surface of the shaft 500 where the lower end of the leak outlet 218 is provided with a leak prevention ring 525 for guiding the leaked heating water toward the leak outlet 218.

Side of the frame 200 is provided with a plurality of vents 216 communicated with the outside air to cool the heat generated by the motor during operation of the pump, the leak outlet 218 is located between the vents 216 It can be configured to.

Between the frame 200, the second motor housing 300, and the shaft 500,

bearings

520 and 530 and wave washers 532 are provided to support the shaft 500 to rotate smoothly.

Fastening

holes

215 and 312 are formed at the lower end of the frame 200 and the upper edge portion of the second motor housing 300 at predetermined intervals along the circumferential direction and are coupled by fastening members 314 such as pins.

Hereinafter, the operation of the present invention configured as described above.

When the pump is operated, current is applied to the coil wound on the stator 700 through the power supply line 810 connected to the condenser 800.

When the magnetic field is formed by the current applied to the stator 700, the rotor 600 provided inside the stator 700 rotates, and the shaft 500 fixed to the rotor 600 rotates together. In conjunction with this, the impeller 400 axially coupled to the end of the shaft 500 rotates to transfer the heating water introduced through the inlet 110 of the head 100 to the outlet 120.

During the operation of the pump, the heating water passing through the head 100 is divided between the shaft housing 212 and the shaft 500 formed at the center of the plane and the division housing 210 integrally provided at the top of the frame 200. The intervening mechanical seal 510 blocks the leakage of the heating water to the motor side.

In this case, even when the water pressure inside the head 100 increases, the division housing 210 and the first motor housing 220 are composed of an integrated frame 200, thereby providing a stable coupling structure without changing the position of the division housing 210. It can be maintained.

In addition, even if a small amount of heating water leaks into the gap between the mechanical seal 510 and the shaft 500, the leaked heating water penetrates the side of the frame 200 by a leakage preventing ring 525 coupled to the shaft 500. Since it is guided and discharged to the leak outlet 218 connected to the outside of the frame 200, the leaked heating water can be completely blocked from penetrating to the motor side.

According to the configuration of the present invention as described above, by configuring the division housing 210 and the first motor housing 220 as an integrated frame 200, the number of parts can be reduced and the coupling structure between the parts can be simplified. The reliability of the product can be improved by preventing the failure of the pump due to leakage of the heating water during operation.

Claims

A head having an inlet and an outlet of heating water and having an impeller for transferring the heating water introduced into the inlet to the outlet;

A stator coupled to the head and having a shaft axially coupled to the impeller, a rotor fixed to the shaft, and a stator for rotating the rotor using a magnetic field generated by an applied current provided around the rotor. Is provided with a motor housing; And

A division housing installed between the head and the motor housing to block the heating water passing through the head from entering the motor housing;

Including,

The motor housing is composed of a first motor housing and a second motor housing,

The division housing and the first motor housing is a pump for a boiler, characterized in that consisting of an integral frame.
The method of claim 1,

The shaft penetrates up and down in the planar center portion of the frame,

A mechanical seal for preventing leakage is coupled to an upper end of the frame through which the shaft passes, and a bearing for rotatably supporting the shaft is coupled to a lower end of the frame through which the shaft penetrates.
The method of claim 2,

The frame pump has a water leakage outlet for discharging the heating water leaked to the motor housing side through the gap between the shaft and the mechanical seal to the outside of the motor housing.
The method of claim 3,

The shaft is a pump for the boiler, characterized in that coupled to the leakage preventing ring for inducing the heating water leaked to the motor housing side through the gap between the shaft and the mechanical seal to the leak outlet side.