KR102041393B1 - Apparatus for lifting deep-seabed mineral resorces - Google Patents

Abstract

Disclosed is a lifting device for transferring of deep-seabed mineral resource. The present lifting device includes a shroud which prevents precipitation of a seabed mineral particle included in a slurry by maintaining a flow rate of the slurry passing through an inside of the lifting device above a critical settling velocity when a solid-liquid slurry composed of seabed mineral particles and seawater is press-transferred to a marine mining line, and is formed with a slurry flow path structure to effectively cool a motor unit by using seawater of low temperature.

Description

Photovoltaic device for transport of deep sea mineral resources {APPARATUS FOR LIFTING DEEP-SEABED MINERAL RESORCES}

The present invention relates to a technology for transporting deep sea mineral resources, and more particularly, to a light lifting device for transmitting the mineral resources collected from the sea bottom to the sea.

In the deep sea, there are abundant deposits of future mineral resources, such as manganese nodules, manganese shells and hydrothermal deposits, which have not yet been developed. The potential value of these deep sea mineral resources is increasing at a time when land resources are depleted and demand for valuable metal resources is increasing.

Deep-sea minerals, especially Manganese Nodule, are deeply potato-like lumps or spherical, light brown, light amorphous. As shown in Figure 1, in general, a system for collecting manganese nodules of the deep sea bottom, condensing device (A) for collecting the manganese nodules from the sea floor, and temporarily store the collected manganese nodules to facilitate the transmission through both pipes Buffer device (B) for forming slurry of manganese nodules and seawater at the optimum concentration, lifting device (C) for vertically conveying to the light beam (D) by applying pressure to the slurry flowing through the lower light pipe, and from the transferred slurry It comprises a light ray (D) for separating and storing the manganese nodules.

Here, the light lifting device C includes a motor for driving the pump and the pump, and is a device for sending the slurry introduced from the buffer device B to the marine light beam D by the pump. The photovoltaic device is connected to the lower and upper photoconductors and pumps the slurry introduced from the lower photoconductors to the upper photoconductors. The motor is electrically driven by being connected to a power cable provided from the light beam D, and pumps the slurry to the upper positive pipe by a pump that is rotated by the rotating shaft of the motor.

The present invention, in the light lifting device for transporting deep sea mineral resources, when the solid-liquid slurry consisting of the sea mineral particles and sea water is transported to the sea mining line, the flow rate of the slurry passing through the inside of the light lifting device is maintained above the limit sedimentation speed Accordingly, an object of the present invention is to provide a light lifting apparatus including a shroud in which a slurry flow path structure is formed to prevent precipitation of subsea mineral particles contained in the slurry and to effectively cool the motor unit using low temperature seawater.

Furthermore, the present invention is a solar light installation device installed in the deep sea bottom, the components constituting the motor unit through the membrane to compensate for and compensate for the pressure difference between the lubricating medium charged inside the motor unit and the sea water outside the motor unit, It is an object of the present invention to provide a light-emitting device that can prevent damage by the device.

In addition, the motor unit is provided with a lubricating medium circulation path for circulating the airtightly filled lubricant inside the motor casing to exchange heat with the slurry passing through the outside of the motor casing, thereby effectively releasing heat generated by the motor components. An object of the present invention is to provide a light-emitting device.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood from the following description.

The lifting device according to the present invention is a lifting device including a motor unit for rotating a rotating shaft and a pump unit including at least one lifting pump driven to be connected to the rotating shaft, the bottom including a submarine mineral and seawater from the pipe. A suction flange portion including a slurry suction port through which the prepared slurry is sucked, and a plurality of mutually spaced cone-shaped flow regulators for distributing the slurry sucked from the slurry suction port into a plurality of radial flow paths extending radially with respect to the rotation axis on an inner side thereof ; A lower casing portion accommodating the motor unit and including a plurality of linear spaced flow regulators spaced apart from each other to form a plurality of linear flow paths continuous to each of the plurality of radial flow paths on an inner side thereof; An upper casing portion having one end connected to the lower casing and accommodating the pump unit therein; And a discharge flange part having one end connected to the upper casing part and the slurry pumped by the pump unit being discharged to the upper positive pipe.

In addition, the lifting device according to the present invention is interposed between the motor unit and the lifting pump, a plurality of confluence flow passages for joining the slurry flowing from each of the plurality of linear flow path in the direction of the rotation axis to deliver to the lifting pump. It may further comprise a flow inducer formed.

In particular, in the light lifting apparatus according to the present invention, it is preferable that the sum of the cross-sectional areas of the plurality of radial flow paths is formed to be less than or equal to the cross-sectional area of the slurry suction port. Further, the cross-sectional area of each of the plurality of linear flow paths is preferably formed to be smaller than or equal to the cross-sectional area of the corresponding radial flow path.

In addition, the motor unit, the conical casing portion in close contact with each of the plurality of cone-shaped flow regulator; And a cylindrical casing portion in close contact with each of the plurality of linear flow regulators, and the conical casing portion may include a dimple portion formed to be curved in a circumferential shape.

In addition, the motor unit includes a motor casing filled with a lubricant, the rotating shaft inside the motor cavity provided in the motor casing, a bearing portion for rotatably supporting the rotating shaft, a rotor fixed to the rotating shaft, and the rotation A motor driving part spaced from the electrons and having a stator wound around a coil; And a membrane that is deformable according to the pressure difference between the inside and the outside of the motor casing at the same time as separating the lubricant filled in the motor casing from the outside, and a membrane casing in which the membrane is disposed inside. It can include;

In addition, the motor unit, the motor cavity is formed therein the rotating shaft, a bearing portion for rotatably supporting the rotating shaft, a rotor fixed to the rotating shaft, a stator spaced apart from the rotor and the coil is wound, and the A motor cavity frame in which circulation impellers which are engaged and rotated at one end of the rotation shaft are disposed; And a cooling frame accommodating the motor cavity frame therein and a cooling channel provided between the motor cavity frame and the motor cavity frame. Here, the lubricating medium hermetically charged inside the motor cavity frame and the cooling frame sequentially passes through the bearing part, the stator, and the cooling channel by the circulation impeller rotated along the rotation axis, and then flows back into the circulation impeller. A lubricant circulation path is formed.

The flow path structure of the slurry provided in the shroud constituting the light lifting device according to the present invention is formed so that the flow rate of the slurry can be maintained above the limit settling flow rate. In particular, a plurality of radial flow regulators, a plurality of linear flow regulators, and a flow inducer, so that the solid-liquid slurry flowing from the slurry inlet is not transferred to the inlet of the lifting pump so that precipitation of the sea minerals does not occur inside the shroud. The flow velocity of the slurry can be kept constant.

In addition, the motor unit according to the present invention includes a pressure balance compensation portion, through which the pressure balance inside and outside the motor unit by generating a corresponding pressure equivalent to the external pressure even if the external pressure (that is, hydraulic pressure) increases Can be achieved. In addition, the motor unit according to the present invention can be utilized as a submersible motor for driving a rotating shaft installed in a deep water as well as a light receiving device.

Furthermore, since the light lifting device according to the present invention is installed in the deep sea bottom, it should be hermetically filled so that the lubricant filled inside the motor casing is not leaked. Since the airtight lubricant filled inside the motor casing is circulated by the circulation impeller and exchanges heat with the seawater passing through the outside of the motor casing, it is possible to effectively cool the motor unit by using the seawater of low temperature in the deep sea.

1 is a view schematically showing the whole mining system for mining deep sea mineral resources.
2 is a view schematically showing a light lifting device according to the present invention.
Figure 3 is a perspective view of the suction flange portion constituting the shroud of the light lifting device according to the present invention.
Figure 4 is a perspective view showing a lower casing portion constituting the shroud of the light lifting device according to the present invention.
5 is a perspective view showing a flow inducer used in the light lifting device according to the present invention.
6 is a cross-sectional view showing a fastening state of the flow inducer and the lift pump.
7 is a cross-sectional view schematically showing a motor unit according to the present invention.
8 is a partial cross-sectional view illustrating the function of the pressure balance compensation unit of the motor unit according to the present invention.
9 is a perspective view showing a coil used in the motor unit according to the present invention.

The present invention may be variously modified and have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail with reference to the accompanying drawings. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In addition, in describing the present invention, when it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

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

First, as shown in FIG. 2, the light lifting apparatus according to the present invention includes a pump unit 300 including a motor unit 200 driving a rotating shaft (not shown) and one or more lifting pumps connected to the rotating shaft. It consists of a shroud that is housed inside. The lifting device is disposed in the central sea (Archibenthic Zone, between about 200 m and 1,000 m from the sea level), and the slurry introduced from the buffer device is sucked and pumped from the lower lifting pipe and discharged to the sea through the upper lifting pipe.

Here, the pump unit 300 is a means for applying pressure to the solid slurry consisting of a mixture of solid particles and seawater of seabed minerals (for example, manganese nodules), it is composed of a plurality of lifting pump 310 arranged in series Can be. In addition, the motor unit 200 is a means for transmitting power to the pump unit 300, a plurality of positive pump 310 is connected to the rotating shaft driven by the motor unit 200. The shroud is designed to support the weight of the photoconductors connected to the top and bottom, the weight of the solid liquid slurry flowing therein, and the torsion by the flow at the seabed. In particular, the shroud is provided with a slurry movement path through which the slurry can be transferred to the pump unit 300 via the outside of the motor unit 200 disposed therein. Hereinafter, the structure of the shroud will be described in more detail. Explain.

The shroud is connected to the lower positive pipe (not shown) to support the load of the lower positive pipe 110, the suction casing 110, the lower casing 120 is accommodated in the motor unit 200, the pump unit therein It may be composed of an upper casing portion 130 is accommodated 300, and a discharge flange portion 140 is connected to the upper positive pipe (not shown) for discharging the slurry to the sea. Here, the suction flange portion 110, the lower casing portion 120, the upper casing portion 130 and the discharge flange portion 140 means a region divided according to the position and function, each of the individual members physically separated It does not mean.

The suction flange 110 is provided with a slurry suction port 112 through which the slurry is sucked. The slurry inlet 112 is preferably formed as a circular opening symmetrical with respect to the virtual center axis P extending from the rotation axis driven by the motor unit 200. On the inner side of the suction flange 110 is formed a plurality of spaced apart cone-shaped flow regulator for distributing the slurry sucked from the slurry inlet 112 to a plurality of radial flow path 116 extending radially with respect to the rotation axis. That is, as shown in Figure 3, the inner surface of the suction flange 110 is formed in a conical shape, a plurality of cone-shaped flow regulator 114 spaced apart from each other on the inner surface is formed. The plurality of cone-shaped flow regulators 114 are preferably arranged to be symmetrical with respect to the central axis P. As shown in FIG. The spaced spaces between the cone flow regulators 114 function as the radial flow path 116. The cone flow regulator 114 is in close contact with the outer surface of the conical casing portion 210 of the motor unit 200 to be described later, so that the space in which the slurry can be moved between neighboring cone flow regulators 114 (that is, a radial flow path ( 116)).

Next, the motor casing 200 is accommodated in the lower casing part 120. As shown in FIG. 4, a plurality of linear flow regulators 124 spaced apart from each other are formed on an inner surface of the lower casing part 120 to form a plurality of linear flow paths 126 continuous to each of the plurality of radial flow paths 116. do. Motor unit 200 is preferably disposed so that the rotation axis coincides with the central axis (P). The plurality of linear flow regulators 124 are in close contact with the cylindrical casing 220 of the motor unit 200, so that spaced spaces between two neighboring linear flow regulators 124 function as the linear flow paths 126.

The upper casing part 130 is positioned above the lower casing part 120 and accommodates a pump unit 300 to which one or a plurality of positive pumps 310 are connected in series. As shown in FIG. 6, the positive pump 310 includes an impeller 314 inside the pump casing 312, while the impeller 314 rotates along the rotation shaft R driven by the motor unit 200. Pressurize the slurry. 5 and 6, the flow inducer 320 is interposed between the motor unit 200 and the positive pump 310 disposed closest to the motor unit 200.

 The flow inducer 320 is provided with a plurality of confluence flow passages 326 that are continuous to each of the plurality of straight flow passages 126. The confluence flow passage 326 rotates the slurry flowing from the corresponding straight flow passage 126. The confluence in the direction of) is delivered to the light pump 310. That is, the joining flow path 326 is formed to be connected to the center of the second surface 322 adjacent to the positive pump 310 side from the edge of the first surface 321 adjacent to the motor unit 200 side. The joining flow passage 326 is formed in the same number as the number of the plurality of linear flow passages 126, and the adjacent slurry flow passage 326 is separated by the isolation port 324.

In the light lifting device including the shroud having the above-described structure, the slurry introduced into the slurry suction port 112 formed in the suction flange 110 is distributed along the plurality of radial flow paths 116 and the plurality of linear flow paths 126. After being guided and transported to the outside of the motor unit 200 along, it is joined by the joining flow path 326 provided in the flow inducer 320 and flows into the lifting pump 310, by the lifting pump 310. Pumped and discharged to the upper positive tube. Here, since the slurry is composed of submarine mineral particles and seawater, the submarine mineral particles included in the slurry may be precipitated when the moving speed of the slurry decreases during transport. The lifting device is disposed upright in water, the precipitation efficiency of the submarine mineral particles due to the flow rate of the slurry decreases the efficiency of the lifting, and may cause a problem that the flow path provided in the lifting device is blocked by the deposition of the sea mineral particles. . Therefore, the flow rate of the slurry passing through the flow path provided in the shroud should be designed in a cross-sectional structure that can be maintained above the threshold sedimentation flow rate.

In the present invention, the flow rate of the slurry introduced through the slurry inlet 112 can be kept constant by distributing the slurry into the plurality of narrow radial flow paths 116 by the plurality of cone-shaped flow regulators 114. In particular, the sum of the cross-sectional area (meaning the cross-sectional area perpendicular to the direction of slurry movement) of each of the plurality of radial flow paths 116 is adjusted by adjusting the dimensions and / or the number of installations of the plurality of cone-shaped flow regulators 114. It is formed to be less than or equal to the cross-sectional area of the inlet 112 (meaning the cross-sectional area perpendicular to the direction of slurry movement), so that the slurry passing through the slurry inlet 112 is distributed to the radial flow path 116 without decreasing the flow rate. can do.

Similarly, the plurality of linear flow regulators 124 form a plurality of linear flow passages 126 continuous to each of the radial flow passages 116. Here, the dimensions and / or the number of installations of the plurality of linear flow regulators 124 are such that when the slurry having passed through each of the radial flow paths 116 passes through the corresponding straight flow path 126, the flow velocity of the slurry is equal to or greater than the threshold settling speed. It can be designed to be maintained as. In particular, the straight flow path 126 is formed by a path formed by the outer surfaces of the adjacent straight flow regulator 124 and the motor unit 200, and the cross-sectional area of the straight flow path 126 (cross section perpendicular to the direction of slurry movement) is defined. Preferably) is formed to be smaller than or equal to the cross-sectional area of the corresponding radial flow path 116 (meaning the cross-sectional area perpendicular to the direction of movement of the slurry).

In addition, the plurality of confluence flow paths 326 provided in the flow inducer 320 may adjust the dimensions and the number of installation of the isolation port 324, thereby allowing the slurry to pass through the confluence flow path 326 continuous to the straight flow path 126. It is possible to control the flow rate to be above the threshold sedimentation flow rate. That is, the cross-sectional area (meaning the cross-sectional area perpendicular to the direction of movement of the slurry) of each of the confluence flow paths 326 is smaller than the cross-sectional area of the corresponding linear flow path 126 (meaning the cross-sectional area perpendicular to the direction of movement of the slurry). Is preferably designed to be equal or equal.

As such, the flow path structure of the slurry provided in the shroud constituting the light lifting device according to the present invention is formed to maintain the flow rate of the slurry above the limiting settling flow rate. In particular, by adjusting the dimensions and the number of installations of the plurality of radial flow regulators 114, the plurality of linear flow regulators 124, and the isolation openings 324, the solid-liquid slurry introduced from the slurry inlet 112 is positively pumped 310. During the transfer to the inlet of, the flow rate of the slurry can be kept constant so that precipitation of the sea mineral particles does not occur inside the shroud.

On the other hand, the motor unit 200 is disposed below the inside of the shroud. Therefore, the slurry introduced into the slurry inlet 112 is transferred to the pump unit 300 disposed above through the outer surface via the front end of the motor unit 200. At this time, the heat generated in the motor unit 200 is heat-exchanged with the low temperature seawater contained in the slurry passing through the outer surface of the motor unit 200.

Looking at the structure of the motor unit 200 with reference to Figure 7 as follows.

The motor casing constituting the motor unit 200 is accommodated in the lower casing portion 120 of the shroud, the conical casing portion 210 in close contact with each of the plurality of cone-shaped flow regulator 114, and a plurality of linear flow regulators. 124 may be composed of a cylindrical casing portion 220 in close contact with each other. In the cylindrical casing 220, various components for driving the rotation shaft R are disposed at appropriate positions.

Here, the slurry introduced through the slurry inlet 112 is distributed to the radial flow path 116 along the outer surface of the conical casing portion 210, and then the straight flow path 126 along the outer surface of the cylindrical casing portion 220. Is transferred to). At this time, the tip 212 of the conical casing portion 210 is provided with a dimple 213 formed to be curved in a circumferential shape. The dimple portion 213 is formed to prevent the turbulence from forming by hitting the conical casing portion 210 with sea mineral particles contained in the solid-liquid slurry flowing from the slurry inlet 112. The dimple portion 213 smoothly guides the movement direction of the subsea mineral particles introduced from the slurry inlet 112 to the radial flow path 116, thereby minimizing the change in the flow velocity of the slurry.

On the other hand, the cylindrical casing 220 is provided with a motor driving unit for rotating the rotation shaft (R). That is, the motor cavity 231 provided in the cylindrical casing portion 220 includes a rotation shaft R, a bearing portion 232 for rotatably supporting the rotation shaft R, and a rotor fixed to the rotation shaft R ( 233 and the rotor 233 are spaced apart from each other at predetermined intervals, and a stator 234 having a coil wound thereon is disposed. The bearing part 232 supports the rotation shaft R to freely rotate, and includes a bearing ball 232a and a bearing carrier 232b. The stator 234 is connected to a power cable (not shown) to generate electromagnetic force by the supplied power, and the rotor 233 fixed to the rotating shaft R is rotated by the electromagnetic force generated by the stator 234 to rotate the shaft. (R) is rotated. Since the bearing part 232, the rotor 233, and the stator 234 constituting the motor driving part may use a conventional motor configuration, detailed description of these components is omitted here.

The cylindrical casing portion 220 which functions as a motor casing in which the above-described motor drive elements are installed is filled with a lubricant. In addition, a pressure balance compensation unit is installed below the cylindrical casing unit 220. The pressure balance compensator includes a membrane 251 that can be deformed according to thermal expansion, thermal contraction, or a differential pressure of seawater, and a membrane cavity 252 in which the membrane 251 is disposed to provide a deformable space. It comprises a casing 250. The pressure balance compensation part may be disposed in an empty space provided in the conical casing part 210 disposed below the cylindrical casing part 220. In addition, at the upper end of the membrane casing 250, a boundary membrane 253 may be disposed to prevent the membrane 251 from being deformed and drawn into the cylindrical casing 220. In addition, the membrane casing 250 has a fluid inlet 250a through which external fluid flows. In addition, an opening 253a through which the lubricant filled in the cylindrical casing 220 is introduced and discharged into the membrane cavity 252a is formed in the boundary membrane 253.

Referring to the function of the pressure balance compensation unit in detail, since the light-emitting device according to the present invention is disposed in the center sea (between about 200m to 1,000m from the sea level), the pressure difference of about 20bar ~ 100bar may occur inside and outside the motor casing. Can be. However, manufacturing the motor unit 200 such that the motor casing has a strength strength capable of withstanding a differential pressure of 20 bar to 100 bar may not only cause a problem in that the weight of the photovoltaic device itself is excessively large, but also economically unrealistic. In other words, it is not practical to design the thickness of the motor casing to withstand seawater pressure as the strength-bearing strength design due to various restrictions for driving the light lifting device. In addition, in the case where the airtightly charged lubricant is thermally expanded or contracted by heat generated during operation of the photovoltaic device, there is a risk that the airtight charge state of the lubricant is released due to a pressure difference with the outside. .

In order to solve this problem, a pressure balance compensator having the above-described structure is provided as a means for achieving a pressure balance by compensating for and compensating the pressure difference inside and outside the motor casing. The membrane 251 constituting the pressure balance compensator is contracted or expanded in accordance with thermal expansion or thermal contraction of a lubricant filled inside the motor casing, or deformed according to the differential pressure in and out of the motor casing by seawater pressure, thereby Balance the pressure difference to achieve equilibrium.

For example, the seawater introduced (arrow ⓐ) through the opening 211 formed in the conical casing 210 flows into the membrane cavity 252 through the fluid inlet 250a formed in the membrane casing 250 (arrow ⓑ). )do. In this case, the membrane cavity 252 is divided into an inner cavity 252a filled with a lubricant by the membrane 251, and an outer cavity 252b in which an external fluid (that is, seawater) is introduced and accommodated.

As shown in FIG. 8, the membrane 251 may be deformed to the motor casing side by the high pressure seawater 200b introduced into the outer cavity 252b. This increases the area of the outer cavity 252b and decreases the area of the inner cavity 252a. At this time, as the area of the inner cavity 252a is reduced, the lubricant 200a filled in the motor casing is compressed. Therefore, even if the external pressure (i.e., hydraulic pressure) is increased, the mechanical components constituting the motor driving unit are not directly damaged, and only the lubricant is compressed, thereby achieving pressure balance inside and outside the motor unit. On the contrary, when the lubricant 200a expands due to the heat generated inside the motor according to the operation of the motor driver, the membrane 251 is deformed to the outside again, thereby reducing the area of the outer cavity 252b and at the same time the inner cavity. 252a maintains pressure equilibrium as the area increases.

Here, the membrane 251 may be formed using a soft metal material or a synthetic resin material. The membrane 251 may be made of any material that can be deformed so as to separate the hermetic sealant and the external fluid (eg, seawater) sealed inside the motor casing and at the same time achieve pressure equalization therebetween. In addition, the membrane 251 is preferably made of a material that can be restored so that the airtightness of the lubricant may be maintained even by multiple contractions or expansions.

On the other hand, the inside of the cylindrical casing 220 constituting the motor casing is provided with a cooling structure for discharging the heat generated in the motor drive unit by the circulation of the lubricant to the outside.

7 again, the cylindrical casing 220 includes a motor cavity frame 230 in which a motor cavity 231 in which a rotating shaft R, a bearing part 232, a rotor 233, and a stator 234 are disposed is formed. And a cooling frame 240 accommodating the motor cavity frame 230 therein and a cooling channel 242 therebetween. In particular, the lower end of the motor cavity frame 230 is provided with a circulation impeller 235 is fastened and rotated to one end of the rotation shaft (R). The lubricant is hermetically filled in the entire space inside the cooling frame 240 including the motor cavity 231 provided in the motor cavity frame 230.

In the motor cavity frame 230 and the cooling frame 240, the lubricant flowing into the motor cavity 231 by the circulation impeller 235 rotated along the rotation shaft R, the bearing part 232 is formed in the region. (Arrow ②), through the region (arrow ③) between the stator 234 and the rotor 233, and through the cooling channel 242 (arrow ④) to the circulation impeller 235 side (arrow ①), and again A lubricant circulation path that can flow into the motor cavity 231 by the circulation impeller 235 is formed. The lubricating medium circulated in this way, after taking away the heat generated from the bearing part 232, the heat generated from the stator 234, and the heat generated from the rotor 233, passes through the cooling channel 242 and the cooling frame 240. The heat generated in the motor is released to the outside by heat exchange with a low temperature slurry passing through the outside. Incidentally, a lubricant may also be filled in the membrane cavity 252a provided in the membrane casing 250 installed under the cooling frame 230. The lubricant 200a filled in the inner cavity 252a may be heat-exchanged through the membrane 251 with seawater filled in the outer cavity 252b.

Since the light lifting device according to the present invention is installed in the deep sea, it must be airtightly filled so that the lubricant filled inside the motor casing is not leaked. In this environment, when the lubricant is circulated along the lubricant circulation path by the circulation impeller 235, heat generated from the motor components may be exchanged with seawater passing outside the motor casing to maximize the cooling efficiency of the motor. . In this case, if the outer circumferential surface of the cooling frame 240 forming the cooling channel 242 between the motor cavity frame 230 is formed of a heat dissipation panel 241 formed of a material having excellent thermal conductivity, cooling efficiency may be further improved. .

On the other hand, since the light lifting device according to the present invention is installed in the deep sea, it is preferable to use water as a lubricant in order to minimize marine pollution when leakage of the lubricant occurs. At this time, the coil wound on the stator 234, it is preferable to use a coil including an electrically conductive metal wire 234a and a waterproof tube 234b covering the same. For example, a short circuit may occur when the metal wire 234a such as copper directly contacts water, which is a lubricant, and therefore, it is preferable to use a coil coated with a waterproof tube 234b that blocks contact with water. Here, as the waterproof tube 234b, a synthetic resin material such as PVC may be used.

Although a preferred embodiment of the present invention has been described so far, those skilled in the art will be able to implement in a modified form without departing from the essential characteristics of the present invention. Therefore, the embodiments of the present invention described herein are to be considered in descriptive sense only and not for purposes of limitation, and the scope of the present invention is shown in the appended claims rather than the foregoing description, and all differences within the equivalent scope are set forth in the present invention. Should be interpreted as being included in.

Claims (7)

A light lifting device comprising a pump unit including a motor unit for driving the rotary shaft to rotate, and at least one lifting pump connected to the rotary shaft,
A mutually spaced plurality of slurry inlets through which a slurry containing sea minerals and seawater is sucked from a lower positive pipe, and a plurality of radial flow paths distributing the slurry sucked from the slurry inlet to a plurality of radial flow paths extending radially with respect to the rotation axis on an inner surface; A suction flange including a cone-shaped flow regulator;
A lower casing portion accommodating the motor unit and including a plurality of linear spaced flow regulators spaced apart from each other to form a plurality of linear flow paths continuous to each of the plurality of radial flow paths on an inner side thereof;
An upper casing portion having one end connected to the lower casing and accommodating the pump unit therein; And
And a discharge flange part having one end connected to the upper casing part and the slurry pumped by the pump unit being discharged to the upper positive pipe.
The method of claim 1,
And a flow inductor interposed between the motor unit and the lifting pump, the flow inductor having a plurality of joining flow paths configured to join the slurry introduced from each of the plurality of linear flow paths in a direction of the rotation axis to be transferred to the lifting pump. Light-emitting device, characterized in that.
The method of claim 1,
And the sum of the cross-sectional areas of the plurality of radial flow paths is smaller than or equal to the cross-sectional area of the slurry inlet.
The method of claim 1,
And a cross-sectional area of each of said plurality of linear flow paths is formed to be less than or equal to the cross-sectional area of said corresponding radial flow path.
The method of claim 1,
The motor unit, the conical casing portion in close contact with each of the plurality of cone-shaped flow regulator; And a cylindrical casing portion in close contact with each of the plurality of linear flow regulators, wherein a tip of the conical casing portion is formed with a dimple formed to be circumferentially curved.
The method of claim 1,
The motor unit,
And a motor casing filled with a lubricant, wherein a rotating shaft is provided inside the motor cavity provided in the motor casing, a bearing portion rotatably supporting the rotating shaft, a rotor fixed to the rotating shaft, and a coil spaced apart from the rotor. A motor drive unit in which the stator is disposed; And
A membrane casing disposed at one side of the motor casing, and a membrane disposed inside the membrane casing, the membrane being filled in the motor casing, and separated from the outside, and deformable according to pressure differences inside and outside the motor casing Pressure balanced compensation comprising a; a light lifting device comprising a.
The method of claim 1,
The motor unit,
A motor cavity is formed therein, the rotating shaft therein, a bearing portion rotatably supporting the rotating shaft, a rotor fixed to the rotating shaft, a stator spaced apart from the rotor and wound with a coil, and fastened to one end of the rotating shaft to rotate. A motor cavity frame in which circulation impellers are disposed; And
And a cooling frame accommodating the motor cavity frame therein and having a cooling channel provided between the motor cavity frame and the motor cavity frame.
Lubrication filled in the motor cavity frame and the cooling frame with airtightly charged lubricant sequentially passes through the bearing part, the stator, and the cooling channel by the circulation impeller rotated along the rotation axis, and then flows into the circulation impeller again. Light circulation device, characterized in that each circulation path is formed.

Images