KR20120053738A

KR20120053738A - Pump

Info

Publication number: KR20120053738A
Application number: KR1020100115012A
Authority: KR
Inventors: 이윤호
Original assignee: 삼진공업 주식회사
Priority date: 2010-11-18
Filing date: 2010-11-18
Publication date: 2012-05-29
Also published as: KR101209166B1

Abstract

PURPOSE: A pump is provided to prevent a deformation and damage of compartments because heat transmitted from liquid of high temperatures is not transmitted to other components with a heating blocking unit and cooling unit. CONSTITUTION: A pump comprises a body, a driving motor, a pumping unit, a connecting member(140), and a heat blocking unit(150). A flow path of liquid is formed in the body. The driving motor is installed in the upper part of the body. The pumping unit is formed in the flow path and operates by the driving motor. The pumping unit circulates the liquid inside the flow path with an operation of the driving motor. The connecting member connects the driving motor and pumping unit so that the pumping unit is operated by a driving force of the driving motor. The heat blocking unit is installed inside of the body and secludes the heat being transmitted to the driving motor from the pumping unit.

Description

Pump {PUMP}

The present invention relates to a pump for circulating high temperature liquid, and more particularly, to a pump capable of improving durability by reducing heat transfer when circulating high temperature liquid, thereby preventing deformation and breakage due to high heat.

Current reactor technologies are classified into pressurized water reactors, boiling water reactors, hot gas cooling furnaces and stepped heavy water reactors. Pressurized and boiling water reactors were developed in the United States, hot gas cooling furnaces were developed in the United Kingdom, and pressurized heavy water reactors were developed in Canada.

Among these, pressurized water reactors use low-enriched uranium (2-4%) as a fuel, water as the coolant and moderator, and pressurize the reactor system to about 150 atm to boil water in the reactor. To prevent them. In addition, the wool heated to high temperature is sent to the steam generator is made into steam through heat exchange with the water of the secondary system.

Pressurized heavy water reactors are similar to pressurized light reactors, except they use natural uranium as fuel and heavy water as moderator and coolant.

Boiling water reactors are similar to coal-fired power plants in that cooling water is boiled directly in a reactor vessel where nuclear reactions occur.

Hot gas cooling furnace uses 93% enriched uranium for helium coolant and graphite moderator. The gas coolant does not need to produce a heat transfer system as a high pressure container because it can maintain the coolant at a high temperature even at low pressure, while the heat transfer characteristics of the gas are not good, the reactor vessel and heat exchangers are large, and the capacity of the gas pump is also large.

On the other hand, Korea's nuclear reactor is Wolseong power plant is pressurized heavy water reactor, the remaining power plants are pressurized light water reactor.

In the nuclear power plant, the part where the coolant containing radioactive material flows around the reactor is called the primary system, and the part containing no radioactive material that generates electricity by turning turbines and generators using steam generated from the steam generator is used. It is called the secondary system.

Such a nuclear power plant consists of a closed circuit in which the primary system and the secondary system are strictly separated and consist of a reactor, a reactor coolant pump, a steam generator, a barometer, and the like. Here, the coolant pump introduces the high temperature and high pressure reactor coolant from the steam generator and supplies it to the reactor.

This reactor coolant pump is a large vertical pump and plays an important role in circulating the coolant from the steam generator to the reactor. The reactor coolant pump may be operated under abnormal conditions such as vibration, thermal deformation, and abrasion according to operating conditions and various defects, thereby causing a decrease in plant reliability. Therefore, research on monitoring and diagnosis of this pump has been continued, and various systems have been installed and operated.

The technical structure described above is a background technique for assisting the understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

As described above, since the reactor coolant pump used in the nuclear power plant circulates liquid at high temperature and high pressure, deformation and breakage of parts are frequently caused by high heat.

The present invention has been made to improve the conventional problems as described above, by reducing the heat transfer when circulating the high temperature liquid, to provide a pump that can improve the durability by preventing deformation and breakage of the components due to high heat The purpose is.

The pump according to the present invention for achieving the above object, the main body is formed with a flow path to move the liquid, the drive motor provided on the upper end of the main body, and provided in the flow path to be operated by the drive motor, A pumping unit for circulating the liquid in the flow path by the operation, the connecting member connecting the drive motor and the pumping unit to operate the pumping unit by the driving force of the drive motor and the inside of the main body to block the heat transmitted to the drive motor from the pumping unit And a thermal cutoff portion.

Here, the pumping unit includes an impeller coupled to the connecting member to be provided inside the flow path and an opening and closing member rotatably installed in the flow path to selectively open and close the flow path according to the rotation and stop of the impeller.

In addition, the opening and closing member includes a pivoting plate rotatably hinged to the flow path and extending from one side of the pivoting plate to open and close the flow path, and having a weight that is heavier than the weight of the pivoting plate.

In addition, the connection member includes a hollow shaft coupled to the lower end of the hollow shaft such that the upper end is located inside the pump shaft and the hollow shaft coupled to the motor shaft of the drive motor.

In addition, the heat shield includes a main convection prevention member provided between the connection member and the main body to prevent air convection and an auxiliary convection prevention member provided inside the connection member to prevent convection of air.

In addition, the main convection prevention member includes a first convection prevention plate which is coupled to the inner surface of the case so as to pass through the case and the connection member coupled to the inside of the main body to cover the connection member and covers the connection member and the case.

In addition, the auxiliary convection prevention member includes a fixing pin coupled to the fixing pin so as to cover the inside of the connecting pin and the fixing pin coupled to the motor shaft of the drive motor to be provided inside the connecting member.

In addition, the heat shield is installed in the main body so as to be provided under the drive motor and includes a heat insulating member for blocking the heat transmitted to the drive motor from the pumping unit.

In addition, the heat insulation member includes an installation space portion formed in the main body and a heat insulator formed by a metal or ceramic and inserted into the installation space portion.

In addition, the pump according to the present invention, the bearing for supporting the rotation of the connection member further includes a liquid inducing portion formed in the connection member so that the liquid generated in the pumping portion is delivered.

The liquid induction part also includes a liquid inflow path formed in the connecting member so that the pumping part and the bearing communicate with each other, and a liquid diffusion part formed in the bearing such that the liquid flowing into the liquid inflow path is supplied to the bearing.

In addition, the liquid diffusion portion is formed in the inner ring so that the first space portion formed between the connection member and the inner ring of the bearing, the second space portion formed between the inner ring and the outer ring of the bearing, and the first space portion and the second space portion communicate with each other. It includes a liquid discharge hole.

In addition, the pump according to the present invention is installed in the main body so as to lubricate and cool the bearing for supporting the rotation of the connection member, and further includes a bearing cooling unit for receiving oil.

In addition, the bearing cooling unit is installed in the main body so as to form a chamber in which the oil is received, the bearing is coupled, and the connecting member and the bearing housing such that the bearing housing and the oil passage are formed to seal the oil passage so that the oil of the chamber is supplied to the bearing. It includes a sealing member provided between.

In addition, the bearing cooling unit further includes an oil drain provided in the main body so that the oil leaked to the outside of the main body.

In addition, the oil drainage portion includes an oil induction member provided below the sealing member and a drainage hole for draining oil induced by the oil induction member to the outside of the main body.

According to the pump according to the present invention configured as described above, since the heat transmitted from the high temperature liquid is transferred to the other parts by the heat shield and the bearing cooling unit is reduced, the deformation and breakage of the parts is prevented to improve durability There is an advantage.

In addition, the present invention, since the flow path of the pumping portion in which the liquid flows is selectively opened and closed by the opening and closing member, there is an effect that the liquid is prevented from flowing back.

In addition, since the liquid is supplied to the bearing supporting the connecting member, the friction of the bearing is reduced and the lubrication is improved, so that the connecting member rotates more smoothly.

1 is a cross-sectional view showing the configuration of a pump according to an embodiment of the present invention.
2 is an enlarged view illustrating main parts of a pumping unit according to an exemplary embodiment of the present invention.
3 is a perspective view showing the configuration of the opening and closing member according to an embodiment of the present invention.
4 is an enlarged view illustrating main parts of a connection member and a heat shield according to an exemplary embodiment of the present invention.
5 is a perspective view showing the configuration of the main convection prevention member according to an embodiment of the present invention.
6 is a perspective view showing the configuration of the auxiliary convection prevention member according to an embodiment of the present invention.
7 is an enlarged view illustrating main parts of a liquid guide part according to an exemplary embodiment of the present invention.
8 is a perspective view showing the configuration of the liquid guide unit according to an embodiment of the present invention.
9 is an enlarged view illustrating main parts of a bearing cooling unit according to an exemplary embodiment of the present invention.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, terms and words used in the present specification and claims are to be interpreted in accordance with the technical idea of the present invention based on the principle that the inventor can properly define the concept of the term in order to explain his invention in the best way. It must be interpreted in terms of meaning and concept.

Hereinafter, the configuration of a pump according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the pump 100 according to the present embodiment is used to circulate a coolant in a nuclear reactor.

The pump 100 circulates the main body 110 in which the flow path 110a is formed, the drive motor 120 provided at the upper end of the main body 110, and the high temperature liquid so that the high temperature liquid can move. It includes a pumping unit 130 provided in the flow path (110a) to be made.

In addition, the pump 100 has a connection member 140 for transmitting the driving force of the drive motor 120 to the pumping unit 130 so that the pumping unit 130 is operated by the drive motor 120, and the heat of the liquid The heat shield 150 prevents the transfer to the driving motor 120 through the connecting member 140, and the liquid inducing unit 160 and the bearing cooling unit 170 to smoothly support the rotation of the connecting member 140. More).

Such a pump 100 can reduce the heat transferred from the pumping unit 130 by the connection member 140, the heat shield 150 and the bearing cooling unit 170 effectively prevents deformation or breakage of parts. can do.

The main body 110 has a lower cabinet 111 having a pumping unit 130 and a heat shield 150 installed therein and a flow path 110a formed at a lower portion thereof, and a bearing cooling unit 170 installed therein, and having a lower cabinet ( The lower cover 113 is coupled to the upper portion of the 111, and the upper cover 115 is coupled to the upper portion of the lower cover 113 so that the drive motor 120 is fixed.

In addition, the main body 110 is protected by the heat insulator 117 outside of the lower cabinet 111 so as to reduce the transfer of external heat into the interior of the lower cabinet 111.

The lower cabinet 111 has a liquid inlet 111a and a liquid outlet 111b so that the liquid is introduced into and discharged from the flow path 110a by the pumping unit 130. In addition, the lower cabinet 111 is provided with a temperature sensor 118 for measuring the temperature of the liquid circulated by the pump 100 and a level sensor 119 for detecting the liquid level inside.

2 and 3, the pumping unit 130 installed in the flow path 110a includes an impeller 131 and a flow path 110a coupled to the connection member 140 so that the driving force of the driving motor 120 is transmitted. ) Is made of an opening and closing member 133 to selectively open and close.

In addition, the pumping part 130 is provided with the opening and closing member 133 is rotatably installed in the flow path (110a) to selectively open and close the flow path (110a) in accordance with the rotation and stop of the impeller (131). At this time, the opening and closing member 133 is rotated by the pressure of the liquid generated when the impeller 131 is rotated to open the flow path (110a), when the impeller 131 is stopped is rotated in reverse by its own weight flow path (110a) ) Seal.

To this end, the opening and closing member 133 is pivotally coupled to the flow path 110a so as to rotate to open and close the flow path 110a, and the rotation plate 135 is restored to its original position to seal the flow path 110a. It consists of a weight weight 137 to rotate the rotating plate 135 to be. At this time, the weight 137 is formed to have a weight heavier than the weight of the rotating plate 135, it is coupled to the rotating plate 135 by a connecting pin 139.

The rotating plate 135 includes a first rotating plate 135a and a second rotating plate 135b which are rotated about the center of the flow path 110a so that the installation space and the rotating space of the weight 137 can be secured. The first rotating plate 135a and the second rotating plate 135b are rotatably installed in the flow path 110a by the hinge shaft 135c.

The weight weight 137 of the first rotating plate 135a is located above the second rotating plate 135b, and the weight weight 137 of the second rotating plate 135b is above the first rotating plate 135a. Is located in. At this time, one end of the first rotating plate 135a and the second rotating plate 135b may be prevented so that the weight 137 is prevented from contacting the upper surfaces of the first rotating plate 135a and the second rotating plate 135b. It is bent upwards to form bent portions 135a 'and 135b', respectively. At this time, when the first pivoting plate 135a and the second pivoting plate 135b are rotated by the weight 137, the other end thereof is caught by a locking step formed in the flow path 110a to seal the flow path 110a. .

The first pivoting plate 135a and the second pivoting plate 135b are coupled to the bent portions 135a 'and 135b', and the connecting pins 139 are coupled to the connecting pins 139. do. For this reason, while the 1st rotating plate 135a and the 2nd rotating plate 135b are prevented from contacting the weight weight 137, it rotates stably.

Meanwhile, coupling holes into which the hinge shaft 135c is inserted are formed in the bent portions 135a 'and 135b' of the first rotating plate 135a and the second rotating plate 135b.

As such, when the impeller 131 is rotated, the pumping unit 130 rotates the first rotating plate 135a and the second rotating plate 135b downward by hydraulic pressure to open the flow path 110a, and the impeller 131. ) Is stopped, the first rotating plate 135a and the second rotating plate 135b are rotated to their original positions by the weight 137 to seal the flow path 110a. This prevents the high temperature liquid from flowing back in the reverse direction when the pump 100 is stopped.

In the present embodiment, the first rotating plate 135a and the second rotating plate 135b are rotated to the original position by the weight 137, and the flow path 110a is sealed. ) May be restored to its original position using an elastic member such as a spring.

The connecting member 140 connecting the driving motor 120 and the impeller 131 so that the driving force of the driving motor 120 is transmitted to the impeller 131 receives heat transmitted from the pumping part 130 to the driving motor 120. It is made to reduce.

Specifically, as shown in FIGS. 1 and 4, the connection member 140 is coupled to the connection shaft 141 coupled to the motor shaft 121 of the drive motor 120, and coupled to the connection shaft 141. Hollow shaft 143 and a fixed shaft 145 is coupled to the hollow shaft 143 and the impeller 131 is fixed.

The connecting shaft 141 is coupled to the motor shaft 121 through the flange 141b, and is rotatably installed in the lower cover 113 by the bearing cooling unit 170. The connecting shaft 141 is formed with a supporting jaw 141a at which an end of the hollow shaft 143 is supported at the lower end thereof so that the hollow shaft 143 is stably inserted and fixed.

The hollow shaft 143 is inserted into the coupling shaft 141 and the fixed shaft 145, the upper and lower ends thereof, and is joined to the connecting shaft 141 and the fixed shaft 145 through welding. The hollow shaft 143 is located inside the lower cabinet 111 of the body 110.

In addition, the hollow shaft 143 is formed with a through hole 143a for air convection at the upper end so that the temperature inside and outside is similar, and the internal pressure is prevented from increasing during rotation by the through hole 143a. .

When the connection member 140 connects the driving motor 120 and the impeller 131, a hollow shaft 143 having a small area is provided between the connecting shaft 141 and the fixed shaft 145, thereby connecting the connecting shaft ( 141, through which the hollow shaft 143 and the fixed shaft 145, the heat of the pumping unit 130 is conducted is reduced to the driving motor 120 and the bearing cooling unit 170. In addition, since the heat shield 150 is provided inside the hollow shaft 143, the connection member 140 may also effectively reduce heat conduction due to air convection.

In this embodiment, for example, the hollow shaft 143 is coupled to the connecting shaft 141, but the hollow shaft 143 may be directly coupled to the motor shaft 121 as required by the user.

The heat shield 150 for more effectively reducing the thermal conductivity of the connection member 140 will be described in detail with reference to FIGS. 4 to 6.

As shown in FIGS. 4 to 6, the heat shield 150 is provided between the hollow shaft 143 of the connecting member 140 and the lower cabinet 111 of the main body 110. And an auxiliary convection prevention member 153 provided inside the hollow shaft 143 of the connection member 140.

The main convection prevention member 151 is coupled to an inner surface of the case 151a installed inside the lower cabinet 111 to cover the hollow shaft 143 and the case 151a to reduce convection of hot air. It consists of one convection prevention plate 151b. The case 151a is respectively coupled to the upper and lower ends by welding to the lower cover 113 and the lower cabinet 111 of the main body 110, and the refrigerant gas supplied into the lower cabinet 111 may pass through the inside. Gas inlet hole (151a ') is formed to be. The first convection prevention plate 151b is formed in a disc shape to cover the hollow shaft 143 and the case 151a, and a through hole 151b 'is formed at the center portion thereof so that the hollow shaft 143 is penetrated. . At this time, the first convection preventing plate 151b is formed with a through hole 151b 'finely larger than the diameter of the hollow shaft 143 so that the first convection preventing plate 151b is prevented from contacting when the hollow shaft 143 is rotated.

In addition, the main convection prevention member 151 is provided with a plurality of first convection prevention plates 151b in the longitudinal direction of the case 151a so that air convection can be more effectively reduced.

The auxiliary convection prevention member 153 covers the inside of the hollow shaft 143 and the fixing pin 153a coupled to the connecting shaft 141 to reduce convection of hot air in the hollow shaft 143. It consists of a second convection prevention plate (153b) coupled to the fixing pin (153a).

The fixing pin 153a is welded by inserting an upper end into the motor shaft 121, and a stopper 153a ′ is provided at the lower end. The stopper 153a 'prevents the second convection prevention plate 153b from being separated from the fixing pin 153a. A center portion of the second convection prevention plate 153b is inserted into and bonded to the fixing pin 153a, and a plurality of second convection prevention plates 153b are provided along the longitudinal direction of the fixing pin 153a.

The heat shield 150 is heated at a high temperature through the interior of the lower cabinet 111 by the first convection prevention plate 151b and the second convection prevention plate 153b provided at the outside and the inside of the hollow shaft 143. It is possible to reduce and reduce the convection of air. As a result, deformation and breakage of components due to heat conduction can be effectively prevented, thereby improving durability of the pump 100.

In addition, the heat shield 150 is a heat insulating member 155 is installed on the upper portion of the main convection prevention member 151 so that the heat transmitted to the lower cover 113 through the lower cabinet 111 is more effectively blocked. It is further provided.

The heat insulating member 155 absorbs heat transferred from the pumping unit 130 through the lower cabinet 111 to further reduce heat conducted to the driving motor 120. To this end, the heat insulating member 155 is composed of an installation space 155a formed in the lower cover 113 of the main body 110 and an insulation 155b inserted into the installation space 155a to absorb heat. . At this time, the installation space 155a is covered by the support plate 155c after the heat insulator 155b is inserted.

The heat insulator 155b is formed of a metal or a ceramic so that heat can be absorbed smoothly, and is formed in a ring shape so that the motor shaft 121 and the hollow shaft 143 can pass therethrough.

In the pump 100 according to the present embodiment, the bearing 103 supporting the motor shaft 121 and the connection member 140 is effectively cooled or lubricated, so that the connection member 140 rotates more smoothly.

To this end, the pump 100 according to the present embodiment supports the liquid induction unit 160 for lubricating the hydrostatic beating (Hydrostatic beating), which is a bearing for supporting the connecting member 140, and the motor shaft 121 It further includes a bearing cooling unit 170 for cooling the ball bearing 103 which is a bearing. This will be described with reference to FIGS. 7 to 9.

First, as shown in FIGS. 7 and 8, the liquid inducing unit 160 lubricating the static pressure bearing 101 is connected to the liquid of the pumping unit 130 by the pressure generated when the impeller 131 rotates. It is formed in the connecting member 140 to be supplied to the inside of the static pressure bearing 101 through the).

Specifically, the liquid guide part 160 is a liquid inflow path 161 formed on the fixed shaft 145 so that the liquid of the pumping part 130 is supplied to the hydrostatic bearing 101 by the pressure generated when the impeller 131 rotates. And a liquid diffusion portion 163 for diffusing the liquid supplied to the liquid inflow path 161 into the positive pressure bearing 101.

The liquid inlet 161 has a liquid inlet formed at a lower end of the fixed shaft 145 so that the pumping unit 130 and the hydrostatic bearing 101 can communicate with each other, and the liquid outlet has a fixed shaft in contact with the positive pressure bearing 101. It is formed on the side of 145.

The liquid diffusion part 163 is a first space part formed between the fixed shaft 145 and the inner ring 101a so that liquid can be smoothly injected between the inner ring 101a and the outer ring 101b of the hydrostatic bearing 101. 163a and the liquid discharge hole 163c communicating with the second space portion 163b and the first space portion 163a and the second space portion 163b formed between the inner ring 101a and the outer ring 101b. ). At this time, the hydrostatic bearing 101 has an inner ring 101a fixed to the fixed shaft 145 through a bolt, and an outer ring 101b fixed to the lower cabinet 111 through a washer.

The first space 163a is formed by recessing a portion where the fixed shaft 145 and the inner ring 101a contact each other.

The second space portion 163b is formed by recessing the outer surface of the inner ring 101a in contact with the outer ring 101b.

The liquid discharge hole 163c is formed at the inner ring 101a so that the liquid can be uniformly supplied to all portions of the second space 163b when the liquid is supplied from the first space 163a to the second space 163b. A plurality is formed in the longitudinal direction.

On the other hand, the hydrostatic bearing 101 according to the present embodiment is lubricated when pressure is generated between the inner ring (101a) and the outer ring (101b), when the liquid is supplied between the inner ring (101a) and the outer ring (101b) Lubrication is more smooth.

9, a bearing cooling unit 170 for cooling and lubricating the ball bearing 103 installed on the connecting shaft 141 is installed at the lower cover 113 of the main body 110, and the ball bearing 103. Oil for cooling and lubrication of the oil is contained.

In detail, the bearing cooling unit 170 may include a bearing housing 173 installed in the lower cover 113 and upper and lower sides of the ball bearing 103 so that the chamber 171 is formed inside the lower cover 113. It consists of a sealing member 175 for sealing.

The bearing housing 173 is coupled to the inside of the lower cover 113 by a bolt, and the support housing 173a to which the outer ring of the ball bearing 103 is inserted and fixed, between the support housing 173a and the lower cover 113. The cover housing 173b is coupled to the lower cover 113 so that the chamber 171 is formed. At this time, an oil passage 173c is formed between the connecting shaft 141 and the bearing housing 173, and oil is supplied to the ball bearing 103 through the oil passage 173c.

In addition, an oil hole 173a 'is formed in the support housing 173a to communicate the chamber 171 and the oil passage 173c so that the oil contained in the chamber 171 can be supplied to the oil passage 173c.

Meanwhile, an oil injection hole 113a for injecting oil into the chamber 171 is formed in the lower cover 113, and an oil discharge hole 173b for discharging oil from the oil passage 173c in the cover housing 173b. ') Is formed.

The bearing cooling unit 170 may prevent the oil of the oil flow path 173c from flowing through the connecting shaft 141 to the lower side when the sealing member 175 is damaged so as to prevent the oil from flowing into the lower cabinet 111. 177 is further provided.

The oil drain 177 may drain the oil guided to the oil guide member 177a provided below the sealing member 175 and the oil guide member 177a to cover the outer surface of the connecting shaft 141. It includes a drain hole 177b for. The oil guide member 177a has a tubular shape such that the space portion 177c is formed between the lower cover 113 and the lower end portion is extended to the outside to be joined to the lower cover 113. The drain hole 177b is formed in the horizontal direction in the lower cover 113 so that the oil in the space 177c is drained out of the lower cover 113.

The operation of the pump according to the embodiment of the present invention configured as described above will be described.

First, when the connection member 140 is rotated according to the operation of the drive motor 120, the impeller 131 coupled to the fixed shaft 145 is rotated so that hot liquid is circulated through the flow path 110a. At this time, the first rotating plate 135a and the second rotating plate 135b for sealing the flow path 110a are rotated downward by hydraulic pressure so that the liquid in the flow path 110a is prevented from flowing backward, and the flow path 110a opens. The liquid is discharged to the liquid discharge port 111b.

When the driving motor 120 stops and the rotation of the impeller 131 is stopped, the first rotating plate 135a and the second rotating plate 135b are rotated to their original positions by the weight 137 to open the flow path 110a. Seal it. For this reason, the liquid of the flow path 110a is prevented from flowing back even if the pump 100 is stopped.

In addition, since the weight 137 is coupled to the bent portions 135a 'and 135b' of the first rotating plate 135a and the second rotating plate 135b through the connecting pins 139, the weight 137 is The contact with the first rotating plate 135a and the second rotating plate 135b is prevented, and the opening and closing operation of the first rotating plate 135a and the second rotating plate 135b proceeds stably.

In addition, in the pump 100 according to the present embodiment, since the connecting shaft 141 and the fixed shaft 145 are connected by the hollow shaft 143, heat conduction by the connecting member 140 may be reduced.

In addition, since a plurality of first convection prevention plates 151b and second convection prevention plates 153b are provided in the longitudinal direction of the lower cabinet 111 on the outside and the inside of the hollow shaft 143, the pumping unit 130 Convection of the heated hot air upward is reduced to prevent breakage or thermal deformation of the drive motor 120 or other components, especially the ball bearing 103, due to heat conduction.

In addition, the heat insulator 155b and the bearing cooling unit 170 are further provided on the upper side of the main convection preventing member 151 to prevent heat from being transferred to the ball bearing 103, the driving motor 120, and other components. Can be reduced more effectively. This further improves the durability of the pump 100.

In addition, since the ball bearing 103 supporting the connecting shaft 141 is cooled and lubricated by oil of the bearing cooling unit 170, the connecting member 140 rotated by the driving motor 120 is more smoothly. Is rotated.

On the other hand, since the pneumatic pressure generated when the impeller 131 is rotated is supplied to the positive pressure bearing 101 supporting the fixed shaft 145 through the liquid induction part 160, the positive pressure bearing 101 is more smoothly lubricated and connected to the connection member. The rotation of the 140 is supported more stably.

It will be apparent to those skilled in the art that the present invention is not limited to the embodiment described above, but may be embodied in various other forms without departing from the spirit of the invention, It will be understood by those of ordinary skill in the art that various changes and modifications may be made without departing from the scope of the present invention.

100: pump 110: body
111: lower cabinet 113: lower cover
115: upper cover 120: drive motor
130: pumping part 131: impeller
133: opening and closing member 140: connecting member
141: connecting shaft 143: hollow shaft
145: fixed shaft 150: heat shield
151: main convection prevention member 153: auxiliary convection prevention member
155: heat insulation member 160: pneumatic transmission unit
161: liquid inlet 163: liquid diffusion
170: bearing cooling unit 171: chamber
173: bearing housing 175: sealing member
177: oil drain

Claims

A main body in which a flow path is formed to move the liquid;
A drive motor provided at an upper end of the main body;
A pumping part provided in the flow path to be operated by the drive motor and circulating the liquid in the flow path by the operation of the drive motor;
A connection member connecting the driving motor and the pumping part to operate the pumping part by a driving force of the driving motor; And
A heat shield provided inside the main body to block heat transferred from the pumping part to the driving motor;
Pump comprising a.

The method of claim 1, wherein the pumping unit,
An impeller coupled to the connection member so as to be provided inside the flow path; And
An opening / closing member rotatably installed in the flow path to selectively open and close the flow path according to rotation and stop of the impeller;
Pump comprising a.

The method of claim 2, wherein the opening and closing member,
A rotating plate rotatably hinged to the flow path to open and close the flow path; And
A weight weight having a weight heavier than the weight of the rotatable plate and coupled to one side of the rotatable plate;
Pump comprising a.

The method of claim 1, wherein the connection member,
A hollow shaft having an upper end coupled to a motor shaft of the drive motor; And
A fixed shaft coupled to a lower end of the hollow shaft to be located inside the pumping unit;
Pump comprising a.

The method of claim 1, wherein the heat shield,
A main convection prevention member provided between the connection member and the main body to prevent air convection; And
An auxiliary convection prevention member provided in the connection member to prevent convection of air;
Pump comprising a.

The method of claim 5, wherein the main convection prevention member,
A case coupled to the inside of the main body to cover the connection member; And
A first convection prevention plate coupled to an inner surface of the case so that the connection member penetrates and covers the connection member and the case;
Pump comprising a.

The method of claim 5, wherein the auxiliary convection prevention member,
A fixing pin having an upper end coupled to a motor shaft of the driving motor to be provided in the connection member; And
A second convection prevention plate joined to the fixing pin to cover the inside of the connection member;
Pump comprising a.

The method of claim 1,
The heat blocking unit is installed on the main body so as to be provided under the drive motor, characterized in that it comprises a heat insulating member for blocking the heat transferred from the pumping unit to the drive motor.

The method of claim 8, wherein the heat insulating member,
An installation space formed in the main body;
A heat insulator formed of metal or ceramic and inserted into the installation space;
Pump comprising a.

The method of claim 1,
And a liquid inducing part formed in the connecting member to supply the liquid of the pumping part to a bearing for supporting the rotation of the connecting member.

The method of claim 10, wherein the liquid guide portion,
A liquid inflow path formed in the connection member such that the pumping part and the bearing communicate with each other; And
A liquid diffusion part formed in the bearing such that liquid flowing into the liquid inflow path is supplied to the bearing;
Pump comprising a.

The method of claim 11, wherein the liquid diffusion portion,
A first space portion formed between the connection member and the inner ring of the bearing;
A second space portion formed between an inner ring and an outer ring of the bearing; And
A liquid discharge hole formed in the inner ring such that the first space portion and the second space portion communicate with each other;
Pump comprising a.

The method of claim 1,
And a bearing cooling unit installed in the main body so as to lubricate and cool the bearing supporting the rotation of the connection member, and containing oil.

The method of claim 13, wherein the bearing cooling unit,
A bearing housing installed in the main body so as to form a chamber in which the oil is accommodated, the bearing is coupled, and a bearing housing forming an oil flow path such that oil in the chamber is supplied to the bearing; And
A sealing member provided between the connection member and the bearing housing such that the oil passage is sealed;
Pump comprising a.

The method of claim 13,
The bearing cooling unit further comprises an oil drain provided in the main body so that the oil leaked to the outside of the main body.

The method of claim 15, wherein the oil drainage portion,
An oil guide member provided below the sealing member; And
A drain hole for draining the oil induced by the oil guide member to the outside of the main body;
Pump comprising a.