KR101284173B1 - submersible pump that has internal cooling loop - Google Patents

Abstract

The present invention is a drive shaft rotated by a drive source; A cartridge chamber slidably mounted to the drive shaft to seal a fluid flowing into the drive source through the drive shaft, the cartridge chamber being disposed on the drive shaft to seal the fluid; A cartridge housing in which the one mechanical seal is disposed; A main housing having a protruding first flange portion supporting the first mechanical seal on an inner circumferential surface and a protruding second flange portion connecting the cartridge housing to an outer circumferential surface thereof; A second mechanical chamber connected to the first flange portion to seal the fluid; It relates to an underwater pump including a cartridge sleeve spaced apart from the cartridge housing and a second mechanical seal disposed therein.

Description

Submersible pump that has internal cooling loop

The present invention relates to a submersible pump having an internal cooling circuit, and more particularly to a submersible pump to which an integrated seal to which a cartridge is applied is applied.

Submersible pumps are electric pumps that operate in water, and are classified into various types, such as heart pump, tap water pressure, and drainage, depending on their purpose and use.

In general, the submersible pump is a device installed in the water to suck the fluid, forced flow, and includes a drive source for generating power, a drive shaft rotated by the drive source, an impeller rotated by the drive shaft and the like.

The submersible pump is forced to flow the fluid while sucking the fluid and discharged through the discharge port while the impeller is rotated by the power of the drive source.

Therefore, when the impeller is rotated, pressure is applied to the driving source, and fluid may flow into the driving source. Therefore, a lubricating oil chamber is disposed between the driving source and the impeller, and a mechanical seal is provided inside the lubricating oil chamber to prevent fluid from flowing into the driving shaft.

However, in the case of the conventional mechanical seal, the fixed chamber, the rotating chamber, and the elastic member must be sequentially mounted in close contact with the rotating shaft in a limited space, and after the thread is mounted, an oil housing must be constructed by installing a heavy seal housing thereon. There was a problem that the surface of the mechanical seal is damaged in the process.

In addition, since the mechanical seal has a structure in which the O-ring is installed in the shaft, the contact surface, and the outdoor part, there is a problem in that the O-ring is difficult to secure and accurate airtightness is difficult to secure.

And the task of mounting the mechanical thread is difficult, there is a problem in that productivity is reduced due to a lot of time and effort.

The problem to be solved by the present invention is to provide a submersible pump having an internal cooling circuit for preventing mechanical damage to the mounting and movement of the mechanical chamber by mounting the mechanical chamber in advance separately.

Another object of the present invention is to provide a submersible pump that can be equipped with a mechanical seal designed to be pre-assembled and cartridgeized the seal in a state in which a complete airtight function is secured and easily mounted on the submersible pump shaft.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the submersible pump having an internal cooling circuit according to an embodiment of the present invention, the drive shaft is rotated by a drive source, and is mounted on the drive shaft by sliding the fluid flowing into the drive source through the drive shaft And a cartridge chamber, wherein the cartridge chamber is disposed on the drive shaft to seal the fluid, a cartridge housing in which the first mechanical chamber is disposed, and a protruding support for the first mechanical chamber on an inner circumferential surface thereof. A main housing having a first flange portion and a protruding second flange portion connected to the cartridge housing on an outer circumferential surface thereof, a second mechanical seal connected to the first flange portion to seal the fluid, and spaced apart from and inside the cartridge housing; A cartridge sleeve in which the second mechanical seal is disposed.

Specific details of other embodiments are included in the detailed description and the drawings.

According to the water pump with the internal cooling circuit of the present invention has one or more of the following effects.

First, the mechanical seal is integrated into the cartridge has an advantage that it is easy to install.

Secondly, the cartridge protects the mechanical seal, so there is less damage caused by the external environment.

Third, there is an advantage to reinforce the watertight function of the mechanical seal is structured to secure the lubricating oil inside.

Fourth, there is an advantage to improve the life of the seal by having a structure to secure the lubricating oil inside so that the surface of the mechanical seal can be lubricated sliding.

Fifth, the lubricating sliding fluid conducts heat generated from the motor by circulating the operating sliding fluid by an internal circulation impeller installed in the mechanical chamber, thereby preventing loss due to heat generation of the motor and enabling all-weather use of the motor. .

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is an exploded perspective view of an underwater pump according to an embodiment of the present invention.
Figure 2 is a side cross-sectional view of the submersible pump according to an embodiment of the present invention.
3 is a perspective view of the cartridge chamber of the submersible pump according to an embodiment of the present invention.
4 and 5 are exploded perspective views of the cartridge chamber of the submersible pump according to an embodiment of the present invention.
6 is an exploded perspective view of the cartridge chamber of the water pump according to another embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for explaining an underwater pump having an internal cooling circuit according to embodiments of the present invention.

1 is an exploded perspective view of an underwater pump with an internal cooling circuit according to an embodiment of the present invention, Figure 2 is a side cross-sectional view of an underwater pump with an internal cooling circuit according to an embodiment of the present invention. In addition, the submersible pump 1 shown in FIGS. 1 and 2 applies an internal cooling method.

1 to 2, the submersible pump 1 having an internal cooling circuit according to an embodiment of the present invention includes a handle 2, a head cover 3, a motor housing 20, and an inner jacket 21. , An outer jacket 22, a drive source 200, a drive shaft 300, a cartridge chamber 100, an adapter 60, a seal cover 40, an impeller and a pump casing 50.

The head cover 3 forms an upper end of the submersible pump 1, and in the present embodiment, the head cover 3 is formed in the shape of a fed hat.

The head cover 3 has a terminal board 6 disposed therein, and the terminal board 6 has various sensors installed directly to detect a state inside the motor housing 20 to be described later. It is connected to an external circuit through a connection terminal inserted through the insertion unit 5 to transmit a signal.

In addition, the terminal board 6 is composed of a board that is largely coupled to the motor housing 20, and a plurality of connection terminals press-fitted to the board to connect the circuit. Of course, the board is made of a non-conductive material, and the connection terminal is made of a conductive material for energizing the internal circuit and the external circuit (cable).

The terminal board 6 is equipped with a temperature sensor, a bearing temperature sensor, a leak detection sensor, etc. of the driving source 200 to detect a state inside the motor housing 20, and externally monitors a state inside the motor housing 20. Generates a signal to output.

The head cover 3 is provided with a protruding power insertion part 5 into which a power line for supplying power to the driving source 200 is inserted.

In addition, the head cover 3 is provided with a protruding sensor inserting portion 5 into which a control line for transmitting a signal output from the terminal board 6 is inserted.

The handle 2 is U-shaped in this embodiment, and both ends are connected to the protruding circumferential surface of the head cover 3. In general, the handle 2 is coupled to the head cover 3 by welding or fastening means.

The motor 200 is disposed in the motor housing 20 and includes a stator 220 that is fixed when the motor 200 is driven and a rotor 210 that is rotated when the motor 200 is driven.

The stator 220 generally consists of an iron core supporting a winding and a frame to which the iron core is attached. In addition, the stator 220 is disposed outside the rotor 210.

Rotor 210 is a general term for the rotating part of the motor 200 is composed of a main shaft, iron core, wire, etc. If there is an imbalance in the rotor 210, the variable load of the motor housing 20 to the main bearing 30 It is transmitted and causes vibration, so it should rotate while maintaining equilibrium.

The stator 220 is disposed outside the rotor 210, and the drive shaft 300 is disposed inside the rotor 210. Therefore, as the rotor 210 rotates, the drive shaft 300 also rotates.

The drive shaft 300 rotates by the power transmitted from the motor 200 and is disposed inside the rotor 210 as described above.

The drive shaft 300 penetrates through the main bearing 30 and the cartridge chamber 100, which will be described later, and a suction impeller 400 is mounted at a lower end thereof. As the drive shaft 300 rotates, the suction impeller 400 also rotates to generate pressure toward the motor 200.

The main bearing 30 is disposed between the motor housing 20 and the drive shaft 300 and serves to absorb the vibration due to the imbalanced rotation of the rotor 210 described above. In general, the main bearing 30 consists of a rolling bearing 30.

The motor housing 20 has a motor 200 disposed therein and an inner jacket 21 spaced apart from the outer circumferential surface thereof. Therefore, a small space is formed between the motor housing 20 and the inner jacket 21, which is the first passage 510 to which the coolant to be described later moves. Accordingly, the coolant moves along the first flow path 510 to cool the motor 200 generating power.

As described above, the inner jacket 21 is spaced apart from the circumferential surface of the motor housing 20, and the outer jacket 22 to be described later is spaced apart from the outer circumference of the inner jacket 21.

Accordingly, a small space is formed between the inner jacket 21 and the outer jacket 22, which is the second flow path 520 through which the coolant moves. However, in another embodiment of the present invention to be described later, there may not be the aforementioned first passage 510 and the second passage 520.

The lower side of the motor housing 20, the inner jacket 21 and the outer jacket 22 is connected to the adapter 60 for fixing it.

The adapter 60 is in close contact with the cartridge housing 110 to be described later in the lower middle area. In addition, the adapter 60 has a plurality of long holes (not shown) formed between an area connected to the motor housing 20, an area connected to the inner jacket 21, and an area connected to the outer jacket 22.

The plurality of long holes (not shown) are connected to the first flow path 510 and the second flow path 520 described above to cool water for cooling the motor 200. The first flow path 510 and the second flow path 520. Flows). Details will be described later.

The adapter 60 is connected to the seal cover 40 to be described later below the area where the outer jacket 22 is connected, the diffuser 70 to be described later is connected to the lower side of the area to which the inner jacket 21 is connected.

As described above, the diffuser 70 is connected to the outer circumference of the adapter 60 and the inner circumference is connected to the circumferential surface of the cartridge housing 110 to be described later. Thus, a space is formed between the diffuser 70 and the adapter 60, which is referred to as the upper flow path 530. In addition, a space is formed between the diffuser 70 and the seal cover 40, which is referred to as the lower flow path 540. Details will be described later.

The seal cover 40 is in close contact with the lower side of the main housing 130 to be described later, and is connected to the adapter 60 as described above.

Accordingly, a space is formed between the adapter 60, the diffuser 70, and the seal cover 40, which is referred to as the lubricant chamber 10 in which the lubricant is filled.

The lubricating oil chamber 10 is disposed between the motor housing 20 and the pump casing 50 to be described later, and the cartridge chamber 100 is disposed in the intermediate region.

Lubricant oil is generally used as the coolant to circulate by the circulation impeller 160 to be described later to cool the motor 200. The above-mentioned coolant and hereinafter coolant are referred to as lubricating oils.

The cartridge chamber 100 is disposed in the intermediate region of the lubricating oil chamber 10 described above.

The cartridge chamber 100 seals the fluid flowing into the motor 200 through the drive shaft 300 by the pressure generated toward the motor 200 when the motor 200 is driven.

In addition, the cartridge chamber 100 is slidably mounted to the drive shaft 300 to seal the fluid flowing into the drive source 200 through the drive shaft 300. Details of the cartridge chamber 100 will be described later with reference to FIG. 3.

The suction impeller 400 is disposed in the impeller chamber 51 which will be described later. The suction impeller 400 is connected to one end of the drive shaft 300 and rotated.

Suction impeller 400 has a wing is formed so as to generate a water pressure in the direction of the motor 200 when rotating, the water pressure is generally about 5kgf / cm2. Therefore, the cartridge chamber 100 is typically manufactured to withstand the water pressure of 10 ~ 15kgf / cm2. However, in another embodiment of the present invention, the water pressure that the cartridge chamber 100 can withstand and the water pressure generated by the motor 200 may be different.

The pump casing 50 forms the lower end of the submersible pump 1 and has an impeller chamber 51 in which the suction impeller 400 is disposed, an inlet 52 through which fluid is sucked, and a discharge port 53 through which the fluid is discharged. Is formed.

The inlet 52 of the pump casing 50 is equipped with an insertion ring for adjusting the spacing with the inlet impeller 400, and the discharge port 53 is connected to a pipe (not shown) for discharging the fluid to the outside.

3 is a perspective view of a cartridge chamber of the submersible pump with an internal cooling circuit according to an embodiment of the present invention, Figure 4 is an exploded perspective view of the cartridge chamber of the submersible pump with an internal cooling circuit according to an embodiment of the present invention. . And the cartridge chamber 100 shown in Figures 3 and 4 is to be mounted on the submersible pump (1) applying the internal cooling method.

3 and 4, the cartridge seal disposed in the intermediate region of the lubricating oil chamber 10 includes the cartridge housing 110, the first mechanical chamber 120, the circulation impeller 160, the main housing 130, and the second housing. Mechanical seal 140 and cartridge sleeve 150.

In general, the mechanical chamber refers to a shaft device of a rotating machine, and the rotating chamber and the fixed chamber are in close contact with each other to block a fluid leakage around the drive shaft 300. The ultra-precisely sealed seal and the flat seat of the seal seat make sliding frictional contact motion under the axial direction of the load due to the balance between the elastic member and the fluid pressure.At this time, the contact surface pressure generated at the interface It is a mechanical component part that blocks the leakage of the sealed fluid. It should be excellent in heat resistance, abrasion resistance, self-lubrication resistance, corrosion resistance, etc. It is mainly used in pumps, agitators, blowers, compressors, turbines, etc.

The cartridge housing 110 has a first mechanical chamber 120 disposed therein, and forms a plurality of openings 111 on the circumferential surface of the cartridge housing 110 so that lubricant oil can be introduced into the cartridge housing 110. In the present embodiment, the plurality of openings 111 have two stages.

The cartridge housing 110 is formed with a plurality of mounting portions 113 on which the sealing means 80 is mounted on the circumferential surface. In the present exemplary embodiment, the plurality of mounting portions 113 may be formed in three stages, and the plurality of openings 111 may be formed between the plurality of mounting portions 113.

The cartridge housing 110 has a through hole 112 through which the drive shaft 300 penetrates in the middle region of the upper portion, and the lower portion is connected to the second flange portion 132 of the main housing 130 to be described later.

The cartridge housing 110 is connected to the inner circumference of the diffuser 70 in the middle region of the circumferential surface.

The first mechanical chamber 120 is disposed inside the cartridge housing 110 and is in close contact with the upper side of the cartridge housing 110 to seal the fluid flowing into the motor 200.

The first mechanical chamber 120 is in contact with the lower side of the first fixing chamber 121, the first fixing chamber 121 is fixed to the upper side of the cartridge housing 110, the first rotating chamber to be rotated by the drive shaft 300 And a first elastic member 123 which closely contacts the 122 and the first rotating chamber 122 to the first fixing chamber 121.

In general, the rotating chambers 122 and 142 are in close contact with the fixed chambers 121 and 141 and are made of a material having excellent heat resistance and abrasion resistance. It is preferably made of silicon carbide material.

The first fixing chamber 121 is disposed on the drive shaft 300, the upper side is fixed to the cartridge housing 110 and the lower side is in close contact with the first rotating chamber 122.

The first rotary chamber 122 is disposed on the drive shaft 300 and rotated by the drive shaft 300. In addition, the first rotary chamber 122 is in close contact with the fixing chamber and the lower side is connected to the first elastic member 123.

The first rotary chamber 122 forms an area protruding downward in order to prevent the first elastic member 123 from leaving its position.

The first elastic member 123 closely contacts the first rotating chamber 122 to the first fixing chamber 121. Therefore, even if the first rotary chamber 122 is worn, so as to be in close contact with the first fixing chamber 121.

The first elastic member 123 is connected to the first rotating chamber 122 on the upper side and the circulation impeller 160 on the lower side.

The first elastic member 123 is composed of a coil spring and the coil spring is fitted into the protruded region of the first rotating chamber 122 described above. However, in another embodiment of the present invention, the first elastic member 123 may be formed of a multi-spring.

The circulation impeller 160 is disposed inside the cartridge housing 110. In addition, the circulation impeller 160 is disposed on the drive shaft 300 is rotated by the drive shaft (300). As the circulation impeller 160 rotates, the lubricant in the lubricant chamber 10 is circulated.

In addition, the circulation impeller 160 has a plurality of wings are formed on the circumference, and the plurality of wings allow the lubricant to rise in the motor 200 side direction.

Circulating impeller 160 is the first elastic member 123 is connected to form a "b" shaped protruding seating portion to prevent the position deviation.

The circulation impeller 160 is in close contact with the first flange portion 131. Therefore, the first flange 131 supports the first elastic member 123 as well as the circulation impeller 160.

The main housing 130 has a first flange portion 131 protruding to support the first elastic member 123 on an inner circumferential surface thereof and a second flange portion 132 protruding so that the cartridge housing 110 is connected to the outer circumferential surface thereof. .

The main housing 130 has a thread 134 formed on the outer circumferential surface thereof so as to be coupled to the cartridge housing 110. In addition, the second flange portion 132 of the main housing 130 has a plurality of fastening holes 133 into which a fastening member is inserted to be coupled to the cartridge housing 110. In addition, the main housing 130 has a hole through which the drive shaft 300 passes.

The first flange portion 131 is formed on the upper side of the main housing 130 and the second flange portion 132 is formed on the lower side of the main housing 130.

The first flange 131 is connected to the circulation impeller 160 to be described later on the upper side and the second fixing chamber 141 is fixed to the lower side.

As described above, the second flange portion 132 has a fastening hole 133 and is fastened to the cartridge housing 110 by a fastening member.

The main housing 130 is in close contact with the seal cover 40 and the surface in which the main housing 130 is in close contact with the seal cover 40 is called a seal contact surface. Preferably, the second flange portion 132 is in close contact with the seal cover 40.

The second mechanical chamber 140 is disposed inside the cartridge sleeve 150 and is in close contact with the upper side of the main housing 130 to seal the fluid flowing into the motor 200.

The second mechanical chamber 140 is in contact with the lower side of the second fixing chamber 141 and the second fixing chamber 141 fixed to the upper side of the main housing 130, the second rotating chamber to be rotated by the drive shaft 300 142 and a second elastic member 143 in close contact with the second fixing chamber 141.

The second fixing chamber 141 is disposed on the drive shaft 300, the upper side is fixed to the main housing 130 and the lower side is in close contact with the second rotating chamber 142.

The second rotating chamber 142 is disposed on the drive shaft 300 and rotated by the drive shaft 300. In addition, the second rotating chamber 142 is in close contact with the second fixing chamber 141 and the lower side is connected with the second elastic member 143.

The second rotary chamber 142 forms an area protruding downward in order to prevent the second elastic member 143 from leaving its position.

The second elastic member 143 closely contacts the second rotating chamber 142 to the second fixing chamber 141. Therefore, even if the second rotary chamber 142 is worn, so as to be in close contact with the second fixing chamber 141.

The second elastic member 143 is connected to the second rotating chamber 142 on the upper side and the cartridge sleeve 150 on the lower side.

The second elastic member 143 is formed of a coil spring and the coil spring is fitted into the protruding region of the second rotating chamber 142 described above. However, in another embodiment of the present invention, the second elastic member 143 may be formed of a multi-spring.

The cartridge sleeve 150 is spaced apart from the lower side of the main housing 130 and the second mechanical seal 140 is disposed therein. In the present embodiment, the second rotary chamber 142 and the second elastic member 143 which are part of the second mechanical chamber 140 are disposed.

The cartridge sleeve 150 has a “b” shaped protruding seating portion formed to prevent the positional deviation while the second elastic member 143 is connected.

A hole through which the drive shaft 300 penetrates is formed in the intermediate region of the cartridge sleeve 150, and a sealing means 80 is installed below the surface corresponding to the drive shaft 300 to prevent fluid from entering.

As described above, the cartridge chamber 100 according to the embodiment of the present invention employs two mechanical chambers 120 and 140 in a tentum manner. Therefore, even if the suction pressure is applied to the motor 200 side by the suction impeller 400 to prevent the inflow of the fluid.

Figure 5 is a side cross-sectional view of an underwater pump with an internal cooling circuit according to another embodiment of the present invention, Figure 6 is an exploded perspective view of the cartridge chamber of the underwater pump with an internal cooling circuit according to another embodiment of the present invention. In addition, the submersible pump 1 and the cartridge chamber 100 shown in FIGS. 5 and 6 apply an external cooling method.

4 and 5 illustrate a submersible pump 1 in which the submersible pump 1 and the cartridge chamber 100 illustrated in FIGS. 1 to 3 are different from each other.

4 and 5, the same reference numerals as in the above-described embodiment indicate the same members. Hereinafter, the description will be focused on the points different from the above-described embodiment.

The difference between the submersible pump 1 and the cartridge chamber 100 shown in FIGS. 4 and 5 is different from the submersible pump 1 and the cartridge chamber shown in FIGS. 1 to 3. The jacket 21 and the diffuser 70 are omitted.

Therefore, a cooling system for cooling the heat generated by the driving of the motor 200 is not mounted.

However, the submersible pump 1 operates in the water bar, the heat generated from the motor 200 can be cooled.

Therefore, it is preferable to use the submersible pump 1 equipped with a motor 200 having a small heat generation by generating a small power, and thus, the cost can be reduced by omitting the aforementioned components.

Referring to the operation of the submersible pump with an internal cooling circuit according to the present invention configured as described above are as follows.

Power is supplied to the terminal board 6 by a power line inserted through the power insertion part 5 connected to the upper side of the head cover 3, and the terminal board 6 is supplied with power to the motor in the motor housing 20. Drive 200.

When the motor 200 of the submersible pump 1 is operated, the rotor 210 in the motor 200 rotates to generate rotational power (hereinafter, referred to as power), and the drive shaft 300 connected to the rotor 210. Power).

The drive shaft 300 is rotated by the power received from the motor 200 and the suction impeller 400 connected to the lower end is also rotated.

The suction impeller 400 raises the fluid in the direction of the motor 200 by a plurality of blades formed on the periphery to generate the suction pressure in the direction of the motor 200.

Therefore, the suction pressure acts toward the motor 200 by the rotation of the suction impeller 400, and the suction pressure also acts on the cartridge chamber 100.

The drive shaft 300 penetrates through the motor housing 20, the adapter 60, the cartridge chamber 100, and the seal cover 40, and the first rotating chamber 122 and the second rotating chamber 122 disposed inside the cartridge chamber 100. The rotating chamber 142 is rotated.

The first rotating chamber 122 disposed inside the cartridge chamber 100 is in close contact with the first fixing chamber 121 to make sliding friction contact motion, and at this time, the motor is driven through the drive shaft 300 by the contact surface pressure generated at the interface. The fluid to be introduced to 200 is hermetically sealed.

In addition, the second rotating chamber 142 disposed inside the cartridge sleeve 150 is in close contact with the second fixing chamber 141 to make sliding friction contact motion, and at this time, the driving shaft 300 is moved by the contact surface pressure generated at the interface. The fluid to be introduced into the motor 200 is hermetically sealed.

In addition, the lubricating oil is supplied to the first mechanical chamber 120 and the second mechanical chamber 140 through a plurality of openings 111 formed in the cartridge housing 110, respectively, between the rotary chambers 122 and 142 and the fixed chambers 121 and 141. Ensures smooth sliding frictional contact movement.

The cartridge housing 110 is in close contact with the above-described adapter 60, the main housing 130 is tightly fixed to the seal cover 40, and the suction pressure is applied to the first mechanical chamber 120 and the circulation impeller 160. Inadequate action However, the cartridge sleeve 150 is spaced apart from the main housing 130 and is not fixed so that the cartridge sleeve 150 is affected by the suction pressure.

Accordingly, the second rotation chamber 142 is in close contact with the second fixing chamber 141 fixed to the main housing 130. Therefore, the inflow of the fluid to the motor 200 is prevented.

And the cartridge sleeve 150 is moved in the direction of the motor 200, but the movement is minimized by the repulsive force of the second elastic member 143.

The fluid tries to flow in the direction of the motor 200, but is first hermetically sealed by the sealing means 80 mounted on the cartridge sleeve 150 and secondly hermetically by the second mechanical chamber 140. In addition, it is possible to prevent the inflow of the fluid to the motor 200 bar is hermetically sealed by the first mechanical chamber 120.

Therefore, the fluid sucked through the suction port 52 formed in the pump casing 50 flows to the discharge port 53 formed in the pump casing 50 without flowing to the motor 200 side, and connects the discharge port 53 to the outside. The fluid is discharged to the outside through a pipe (not shown).

In addition, according to an embodiment of the present invention, when the drive shaft 300 rotates, the circulation impeller 160 disposed inside the cartridge housing 110 rotates.

As the circulation impeller 160 rotates, the lubricant in the lubricant chamber 10 is circulated, and the motor housing 20, the inner jacket 21, the outer jacket 22, the adapter 60, and the diffuser 70 are described above. The lubricant flows through the first passage 510, the second passage 520, the upper passage 530, and the lower passage 540 formed by the seal cover 40.

The lubricant flows to the upper passage 530 by raising the lubricant in the lower passage 540 toward the motor 200 by the rotation of the circulation impeller 160.

The upper passage 530 is connected to the first passage 510, and the lubricating oil flows into the first passage 510 and absorbs heat generated by the driving of the motor 200. The lubricating oil passing through the first passage 510 flows into the second passage 520 and radiates heat to the outside to cool the lubricant.

The lubricating oil passing through the second passage 520 flows to the cartridge chamber 100 through the lower passage 540, so that the lubricating oil circulates.

Although the above has been illustrated and described with respect to the preferred embodiment of the present invention, the present invention is not limited to the above-described specific embodiment, but in the technical field to which the invention belongs without departing from the gist of the invention as claimed in the claims. Various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

1: Submersible pump 10: Lube oil chamber
20: motor housing 21: inner jacket
22: outer jacket 40: seal cover
50: pump casing 51: impeller chamber
52: suction port 53: discharge port
60: adapter 70: diffuser
100: cartridge chamber 110: cartridge housing
111: opening 112: through hole
113: mounting portion 120: the first mechanical seal
121: first fixing chamber 122: first rotating chamber
123: first elastic member 130: main housing
131: first flange portion 132: second flange portion
133: fastening hole 140: second mechanical seal
141: second fixing room 142: second rotating room
143: second elastic member 150: cartridge sleeve
160: circulation impeller 200: drive source
300: drive shaft 400: suction impeller
510: first euro 520: second euro
530: upper flow path 540: lower flow path

Claims (8)

A drive shaft rotated by the drive source;
A cartridge chamber slidably mounted to the drive shaft to seal a fluid flowing into the drive source through the drive shaft;
The cartridge chamber,
A first mechanical chamber disposed on the drive shaft to seal the fluid;
A cartridge housing in which the one mechanical seal is disposed;
A main housing having a protruding first flange portion supporting the first mechanical seal on an inner circumferential surface and a protruding second flange portion connecting the cartridge housing to an outer circumferential surface thereof;
A second mechanical chamber connected to the first flange portion to seal the fluid;
A cartridge sleeve spaced apart from the cartridge housing and having a second mechanical seal disposed therein;
An underwater pump having an internal cooling circuit disposed in the cartridge housing and including a circulation impeller rotated by the drive shaft to circulate lubricating oil.
The method of claim 1,
An adapter in close contact with an upper side of the cartridge housing; Submersible pump having an internal cooling circuit further comprising a seal cover in close contact with the lower side of the main housing.
delete The method of claim 1,
The cartridge housing has a submersible pump having an internal cooling circuit formed with a plurality of openings on the circumferential surface.
The method of claim 1,
The cartridge housing has a submersible pump having an internal cooling circuit is formed on the circumferential surface a plurality of mounting portion is mounted.
The method of claim 1,
The first mechanical chamber includes a first fixing chamber fixed to an upper side of the cartridge housing; A first rotating chamber in close contact with the first fixed chamber and rotated by the drive shaft; A first elastic member for closely contacting the first rotating chamber to the first fixing chamber,
The second mechanical chamber includes a second fixing chamber fixed to the lower side of the main housing; A second rotary chamber in close contact with the second fixed chamber and rotated by the drive shaft; An underwater pump having an internal cooling circuit comprising a second elastic member to closely contact the second rotating chamber to the second fixed chamber.
The method of claim 1,
The main housing has a submersible pump having an internal cooling circuit threaded to be coupled to the cartridge housing on the outer peripheral surface.
The method of claim 1,
The second flange portion is a submersible pump having an internal cooling circuit is formed with a plurality of fastening holes into which the fastening member is inserted to be coupled to the cartridge housing.

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