JP2007159382A - Fine droplet mist producing motor for salt production application - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fine droplet mist producing motor, pertaining to technology to ensure longevity thereof, when evaporating water content to produce salt by causing sea water to be dispersed into a fine mist state, and applying warm wind to hot wind, that ensures longevity of a high speed driving motor for thus causing sea water into the state of mist. <P>SOLUTION: A fine droplet mist producing motor is constructed such that a salt-proof covering means for enclosing an output shaft of a motor for producing fine mist of sea water is provided, and compressedair is supplied into the interior of the sealed space in which the motor itself is accommodated. A shielding means with larger diameter than the outer diameter of the motor output shaft is designed to be provided on the outer perimeter of the motor included in the salt-proof covering means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a technique for extending the life of a motor for generating fine mist when salt is formed by evaporating moisture by applying warm air or hot air in the form of fine mist to seawater.

The inventor of the present invention, in Japanese Patent No. 3250738, obtains salt crystals instantly by spraying warm air or hot air in a fine mist state by scattering seawater with a water wheel type impeller having a radial cavity. A salt production method was proposed. Salt produced by this technology has received a high evaluation because it contains abundant minerals in seawater and is effective in maintaining health, and it is becoming popular not only in Japan but also abroad.

In order to meet such a high demand, it is necessary to realize a long life of the drive motor that rotates at high speed in order to mass-produce high-quality salt at a lower cost. In view of this, the inventors of the present invention, in Japanese Patent Application No. 2004-152347, provided salt-proof cover means for enclosing the output shaft of a motor for generating fine mist of seawater, and the motor itself was housed in a sealed space. A structure has been proposed in which a sealing means is provided on the outer periphery to prevent salt from entering from a gap outside the output shaft.

In this way, the salt-proof cover means that surrounds the output shaft of the motor for generating fine mist is provided, so that salt content can be prevented from reaching the motor shaft, and salt content penetrates into the motor along the motor shaft. Can be suppressed. In addition, since sealing means such as an oil sealer is provided on the outer periphery of the output shaft, it is possible to more effectively suppress salt from entering from the gap outside the output shaft.
Patent No. 3250738 Patent application 2004-152347

Although the above-mentioned structure improves the life of the fine fog generating motor to some extent, it is impossible to prevent moisture and salt from adhering to the motor output shaft. It is difficult to reliably avoid intrusion, and in the case of an expensive high-speed high-precision motor that rotates the rotating disk for generating fine mist at a high speed, the intrusion of salt is prevented more reliably than the bearing grease or bearing. It is necessary to delay the deterioration of the inner motor mechanism. In addition, it is necessary to suppress the fine mist that is scattered at the fine mist generating portion or detouring to the motor side, and also to suppress the deterioration due to the load of the motor bearing portion.

The technical problem of the present invention is to pay attention to such a problem and to more reliably extend the life of a high-speed drive motor for making seawater into a fine mist.

The technical problem of the present invention is solved by the following means. According to a first aspect of the present invention, there is provided a salt-proof cover means for enclosing the output shaft of a motor for generating fine mist of seawater, the motor itself is housed in a sealed space, and compressed air is supplied into the sealed space. This is a fine mist generating motor. Thus, since the salt prevention cover means surrounding the output shaft of the fine mist generating motor is provided, it is possible to suppress salt from reaching the motor output shaft from the fine mist chamber. In addition, since the motor itself is housed in a sealed space and compressed air is supplied to the inside of the sealed space, the sealed space has a higher pressure than that in the salt-proof cover. And entering the sealed space from the gap between the output shafts. For this reason, it is possible to prevent salt damage from entering the motor or the bearing portion and causing salt damage such as corrosion and deterioration.

According to a second aspect of the present invention, the fine mist generating motor according to claim 1, wherein a blocking means having a diameter larger than the outer diameter of the motor output shaft is provided on the outer periphery of the motor output shaft in the salt prevention cover means. It is. Since the compressed air is supplied to the inside of the sealed space containing the motor as in claim 1, the pressure can suppress the salt from entering from the gap between the motor output shaft and the bearing. As described above, since the blocking means having a diameter larger than the outer diameter of the motor output shaft is provided on the outer periphery of the motor output shaft in the salt-proof cover means, the salinity becomes liquid and moves toward the motor side along the surface of the output shaft. It can block and prevent transmission.

According to a third aspect of the present invention, a stirring fan is provided on the motor output shaft in the salt prevention cover means, and one or more compressed air inlets are provided between the stirring fan and the bearing. Item 3. The fine mist generating motor according to Item 2. As described above, since the motor output shaft is provided with the stirring fan and one or more compressed air inlets are provided between the stirring fan and the bearing, the salt content in the salt prevention cover means is reduced by the compressed air. It is pumped to the tip side and can be more reliably prevented from entering the sealed space. Moreover, the inside of the salt prevention cover means is agitated by the agitating fan, the pressure inside the salt prevention cover means is made uniform, and coupled with the provision of compressed air inlets at a plurality of locations, the salt prevention cover means The pressure can be evenly increased to prevent the infiltration of salt.

According to a fourth aspect of the present invention, there is provided the fine mist generating motor according to any one of the first, second, and third aspects, wherein compressed air is supplied into the motor cover in the sealed space. Thus, since compressed air is supplied to the inside of the motor cover in the sealed space, the pressure inside the motor cover increases, and as a result, salt enters the inside of the motor cover, causing salt damage to the motor mechanism part and the bearing part. Can be more reliably prevented.

The salt mist chamber with fine mist of seawater is always in a high pressure state because hot air is constantly applied to the fine mist, and the inside of the fine mist generating motor is in a relatively negative pressure state. However, fine mist and salt water can be effectively prevented from entering the motor by supplying compressed air from each inlet and maintaining the high pressure state as described above.

According to a fifth aspect of the present invention, a small radial hole for injecting compressed air toward the outer periphery of the output shaft is provided in a seal housing serving as a salt-proof cover means that surrounds the output shaft of a motor for generating fine fog of seawater. 2. The fine mist generating motor according to claim 1, wherein an outer end of each of the radial small holes is provided to be able to communicate with a compressed air source. As described above, the seal housing that surrounds the output shaft of the motor is provided with radial small holes for injecting compressed air toward the outer periphery of the output shaft, and the outer ends of the radial small holes can be communicated with the compressed air source. Compressed air supplied from the compressed air source is jetted from the inner end of each radial hole toward the motor output shaft, so that foreign matter such as salt, moisture, and dust can be externally applied to the bearing of the motor output shaft and inside the motor. It is possible to prevent the motor from entering and deteriorating.

According to a sixth aspect of the present invention, a capacitor chamber composed of a ring-shaped cavity is formed in the seal housing so as to surround the output shaft, and is interposed between each outer end of the radial small hole and a compressed air source. The fine mist generating motor according to claim 5. Thus, in the seal housing, a capacitor chamber composed of a ring-shaped cavity is formed so as to surround the output shaft, and is interposed between each outer end of the radial small hole and a compressed air source. The compressed air once accumulated and accumulated in the capacitor chamber is uniformly injected to the outer periphery of the motor output shaft. Since the capacitor chamber is a ring-shaped cavity so as to surround the motor output shaft, it can be compactly formed in the seal housing.

According to a seventh aspect of the present invention, the inner end of the radial small hole is inclined toward the distal end side of the output shaft so that the air flow ejected from the radial small hole is ejected toward the distal end side of the output shaft. Inclined toward the rotation direction of the output shaft, the air flow ejected from the radial small holes becomes a vortex-like circulation flow in the same direction as the rotation direction of the output shaft. The fine mist generating motor according to claim 5 or 6. As described above, since the inner end of the radial small hole is inclined toward the distal end side of the output shaft, the air flow ejected from the radial small hole is ejected toward the distal end side of the output shaft. Foreign matter entering from the tip side of the shaft can be effectively prevented. Further, since the inner end of the radial small hole is inclined toward the rotation direction of the output shaft, the air flow ejected from the radial small hole becomes a vortex-like circulation flow in the same direction as the rotation direction of the output shaft, As a result, the compressed air flow is not interrupted or non-uniformly around the outer periphery of the motor output shaft, and the entry of foreign matter can be more reliably prevented in combination with the jet flow in the tip direction of the motor output shaft.

An eighth aspect of the present invention is a fine mist generating motor characterized in that a high-speed rotating plate for generating fine mist of seawater driven by a motor is formed as a concave curved surface and seawater is supplied to the center thereof. A conventional high-speed rotating disk for generating fine mist sucks seawater from the central seawater supply port together with outside air by centrifugal force and discharges it through each radial cavity. A load in the thrust direction is generated on the bearing portion, and the bearing portion is damaged. However, if the high-speed rotating plate for generating fine mist is a concave curved surface as in the present invention and seawater is supplied to the center thereof, there is no radial cavity that sucks and discharges outside air by centrifugal force. No thrust load is generated at the bearing. As a result, it is possible to suppress a decrease in life due to damage of the motor bearing portion.

In addition, in the case of a high-speed rotating disk having a conventional radial cavity, in addition to the discharge of seawater by centrifugal force, the flow of air sucked in a large amount is added to the speed of fine particles accelerated by centrifugal force. In order to power up, when hot air is applied from the back, the fine mist of seawater is not smoothly pumped to the center of the saltmaking chamber, that is, it scatters without flowing forward and bypasses the motor output shaft as described above Will occur. However, in the case of a concave curved high-speed rotating plate like the present invention, unlike each radial cavity of a conventional waterwheel type high-speed rotating disk sucked a large amount of air by centrifugal force and accelerated, Since such an acceleration flow in the radial direction does not occur, scattering due to hot air blowing and a detour component toward the motor output shaft can be reduced, and a reduction in motor life due to salt damage is also suppressed.

A ninth aspect of the present invention is the fine mist generating motor according to the eighth aspect, wherein a large number of radial guide grooves and / or protrusions are provided on at least the outer peripheral side of the concave curved surface of the high-speed rotating plate. As described above, when a large number of radial guide grooves and / or ridges are provided on the concave curved surface of the high-speed rotating plate, the seawater film expands while gradually forming a thin film shape by centrifugal force along the concave curved surface. Are dispersed in a number of radial guide grooves. Alternatively, it is dispersed along the ridges. As a result, when it is released from the outer periphery of the concave curved surface at a high speed rotation and shaken off, it becomes an infinite number of fine mists and scatters, and the fine mists can be generated effectively. The radial guide grooves and / or ridges need only be provided on the outer peripheral side of the high-speed rotating plate. Since more radial guide grooves and / or ridges can be formed on the outer peripheral side having a large outer diameter, a larger number of radial cavities can be formed than conventional radial wings, and the dispersion efficiency of seawater is high.

10. The fine mist generating motor according to claim 8 or 9, wherein a separation means having a narrow net or other fine interval is provided on the outer periphery of the concave surface of the high-speed rotating plate. is there. In this way, when a large number of separation means with a narrow net and other fine intervals are provided on the outer periphery of the concave curved surface of the high-speed rotating plate, the membrane-like seawater that has spread by centrifugal force along the concave curved surface When it reaches the outer circumference, it is separated and dispersed innumerably by a large number of mesh-like separation means, and it is spun off frequently by the rotational force of the high-speed rotating plate, and it becomes a fine mist and scatters from the outer circumference of the concave curved surface. .

Unlike the conventional water wheel type radial cavity, the structure in which the guide grooves and the ridges are provided as in claim 9 and the separating means in the outer periphery as in claim 10 is easily formed innumerably. Therefore, even when the rotational speed is relatively low and the centrifugal force is relatively small, the dispersion efficiency is high, and fine mist can be generated smoothly. As a result, the fine mist generating motor can be rotated at a relatively low speed, and the wear deterioration of the bearing is small and the life can be extended.

In the eleventh aspect, a donut-shaped plate is provided at an intermediate position in the radial direction of the concave curved surface of the high-speed rotating plate, and a large number of radial cavities are sandwiched between the donut-shaped plate and the concave curved surface. The fine mist generating motor according to claim 8, 9 or 10. In this way, a donut-shaped plate is provided at the radial intermediate position of the concave curved surface of the high-speed rotating plate, and a large number of radial cavities are sandwiched between the donut-shaped plate and the concave curved surface. Since it is formed, a conventional water wheel type radial cavity is provided only at the intermediate position in the radial direction of the concave curved surface. As a result, when the high-speed rotating plate is used upright, the seawater supplied to the center of the concave curved surface is effectively and uniformly distributed over the entire circumference by the radial blades provided at the intermediate position in the radial direction of the concave curved surface. . Thereafter, the film reaches the outer peripheral edge while being stretched in a film shape along the concave curved surface, and is shaken off as a uniform fine mist all around. In addition, since there are radial cavities with large suction and output at only the intermediate position in the radial direction of the concave curved surface, the fine mist muddy in front of the concave curved surface is effectively sucked into each radial cavity from the outer end. Since it can discharge | release, the stagnation of the fine mist in front of the concave curved surface resulting from hot air blowing is also eliminated.

In a twelfth aspect of the present invention, radial blades are provided so as to surround the inflow portion of the seawater near the center of the concave curved surface of the high-speed rotating plate. 10 or a fine mist generating motor according to claim 11. Thus, since the radial blades are provided so as to surround the inflow portion of seawater near the center of the concave surface of the high-speed rotating plate, the center of the concave surface is used when the high-speed rotating plate is used upright. The seawater supplied to is immediately and effectively dispersed uniformly around the circumference by the rotation of the blades in the radial direction, and then stretched into a film along the concave curved surface. Can occur.

Since the saltproof cover means surrounding the output shaft of the fine mist generating motor is provided as in the first aspect, it is possible to suppress salt from reaching the motor output shaft from the fine mist chamber. Moreover, since compressed air is supplied to the inside of the sealed space in which the motor itself is housed, the sealed space has a higher pressure than in the salt-proof cover means, so that the salt content in the salt-proof cover means is between the shaft hole and the output shaft. Can be prevented from entering the sealed space through the gap. For this reason, it is possible to prevent salt damage from entering the motor or the bearing portion and causing salt damage such as corrosion and deterioration.

Since compressed air is supplied to the inside of the sealed space containing the motor as in claim 1, salt pressure can be prevented from entering from the gap between the motor output shaft and the bearing by the pressure, but as in claim 2. Further, since the blocking means having a diameter larger than the outer diameter of the motor output shaft is provided on the outer periphery of the motor output shaft in the salt prevention cover means, the salt content becomes liquid and is transmitted to the motor side along the surface of the output shaft. Can be blocked and blocked.

According to the third aspect of the present invention, the motor output shaft is provided with a stirring fan, and one or more compressed air inlets are provided between the stirring fan and the bearing. It is pumped to the tip side of the output shaft, and can be more reliably prevented from entering the sealed space. Moreover, the inside of the salt prevention cover means is agitated by the agitating fan, the pressure inside the salt prevention cover means is made uniform, and coupled with the provision of compressed air inlets at a plurality of locations, the salt prevention cover means The pressure can be evenly increased to prevent the infiltration of salt.

Since compressed air is supplied to the inside of the motor cover in the sealed space as in claim 4, the pressure inside the motor cover increases, and as a result, salt enters the inside of the motor cover and the motor mechanism and bearings. It is possible to more reliably prevent salt damage to the part.

The salt mist chamber with fine mist of seawater is always in a high pressure state because hot air is constantly applied to the fine mist, and the inside of the fine mist generating motor is in a relatively negative pressure state. However, fine mist and salt water can be effectively prevented from entering the motor by supplying compressed air from each inlet and maintaining the high pressure state as described above.

As in claim 5, a radial small hole for injecting compressed air toward the outer periphery of the output shaft is provided in the seal housing that surrounds the output shaft of the motor, and the outer end of each radial small hole can communicate with the compressed air source Therefore, compressed air supplied from the compressed air source is jetted from the inner end of each radial small hole toward the motor output shaft, so that foreign matter such as salt, moisture, and dust is externally It is possible to prevent the motor from entering the motor and deteriorating.

According to a sixth aspect of the present invention, a capacitor chamber composed of a ring-shaped cavity is formed in the seal housing so as to surround the output shaft, and is interposed between each outer end of the radial small hole and a compressed air source. Therefore, the compressed air once accumulated and accumulated in the capacitor chamber is uniformly injected to the outer periphery of the motor output shaft. Since the capacitor chamber is a ring-shaped cavity so as to surround the motor output shaft, it can be compactly formed in the seal housing.

Since the inner end of the radial small hole is inclined toward the distal end side of the output shaft as in claim 7, the jet air flow from the radial small hole is ejected to the distal end side of the output shaft. Foreign matter entering from the tip side of the motor output shaft can be effectively prevented. Further, since the inner end of the radial small hole is inclined toward the rotation direction of the output shaft, the air flow ejected from the radial small hole becomes a vortex-like circulation flow in the same direction as the rotation direction of the output shaft, As a result, the compressed air flow is not interrupted or non-uniformly around the outer periphery of the motor output shaft, and the entry of foreign matter can be more reliably prevented in combination with the jet flow in the tip direction of the motor output shaft.

If the high-speed rotating plate for generating fine mist is a concave curved surface and seawater is supplied to the central part thereof as in claim 8, there is a radial cavity that sucks and discharges outside air by centrifugal force as in the prior art. As a result, no thrust load is generated at the motor bearing. As a result, it is possible to suppress a decrease in life due to damage of the motor bearing portion. In addition, in the case of a high-speed rotating disk having a conventional radial cavity, in addition to the discharge of seawater by centrifugal force, the flow of air sucked in a large amount is added to the speed of fine particles accelerated by centrifugal force. In order to power up, when hot air is applied from the back, the fine mist of seawater is not smoothly pumped to the center of the saltmaking chamber, that is, it scatters without flowing forward and bypasses the motor output shaft as described above Will occur. However, in the case of the concave curved high-speed rotating plate as in claim 8, each radial cavity of the conventional water wheel type high-speed rotating disk is accelerated by sucking a large amount of air by centrifugal force. Since such an acceleration flow in the radial direction is not generated, scattering caused by blowing hot air and a detour component toward the motor output shaft can be reduced, and a reduction in motor life due to salt damage is also suppressed.

If a large number of radial guide grooves and / or ridges are provided on the concave curved surface of the high-speed rotating plate as in claim 9, the film gradually expands along the concave curved surface with a centrifugal force. Seawater membranes are dispersed in a number of radial guide grooves. Alternatively, it is dispersed along the ridges. As a result, when it is released from the outer periphery of the concave curved surface at a high speed rotation and shaken off, it becomes an infinite number of fine mists and scatters, and the fine mists can be generated effectively. Since more radial guide grooves and / or ridges can be formed on the outer peripheral side having a large outer diameter, a larger number of radial cavities can be formed than conventional radial wings, and the dispersion efficiency of seawater is high.

Since a large number of separation means with a small width and other fine intervals are provided on the outer periphery of the concave curved surface of the high-speed rotating plate as in claim 10, membrane-like seawater that has spread by centrifugal force along the concave curved surface When it reaches the outer periphery of the concave curved surface, it is separated and dispersed innumerably by a large number of mesh-like separation means, and the outer periphery of the concave curved surface becomes a fine mist while being frequently shaken off by the rotational force of the high-speed rotating plate. Scatter from.

Unlike the conventional water wheel type radial cavity, the structure in which the guide grooves and the ridges are provided as in claim 9 and the separating means in the outer periphery as in claim 10 is easily formed innumerably. Therefore, even when the rotational speed is relatively low and the centrifugal force is relatively small, the dispersion efficiency is high, and fine mist can be generated smoothly. As a result, the fine mist generating motor can be rotated at a relatively low speed, and the wear deterioration of the bearing is small and the life can be extended.

As in claim 11, a large number of radial cavities are formed between a donut-shaped plate provided at a radial intermediate position of the concave curved surface of the high-speed rotating plate and a large number of radial blades between the concave curved surface. Therefore, the conventional water wheel type radial cavity is provided only at the intermediate position in the radial direction of the concave curved surface. As a result, when the high-speed rotating plate is used upright, the seawater supplied to the center of the concave curved surface is effectively and uniformly distributed over the entire circumference by the radial blades provided at the intermediate position in the radial direction of the concave curved surface. . Thereafter, the concave curved surface is moved to the outer peripheral end, and is shaken off as a uniform fine mist all around. In addition, since there are radial cavities with large suction and output at only the intermediate position in the radial direction of the concave curved surface, the fine mist muddy in front of the concave curved surface is effectively sucked into each radial cavity from the outer end. Since it discharges, the stagnation of fine mist in front of the concave curved surface due to the hot air blowing is also eliminated.

As in claim 12, near the central portion of the concave surface of the high-speed rotating plate, since a radial blade is provided so as to surround the inflow portion of seawater, when the high-speed rotating plate is used upright, Seawater supplied to the center of the concave curved surface is immediately and effectively distributed uniformly around the entire circumference by the rotation of the blades in the radial direction, and then stretched into a film along the concave curved surface. Fine mist can be generated.

Next, an embodiment of how the fine mist generation motor for seawater according to the present invention is actually realized will be described. FIG. 1A is a longitudinal sectional view showing a first embodiment of a fine mist generating motor according to the present invention, and a high-speed rotating disk 2 is fixed to the tip of an output shaft 1 of a drive motor M. FIG. As shown in FIG. 1 (2), the high-speed rotating disk 2 has a sectional structure in which a large number of radial guide vanes 3 are provided between two disks 31 and 32 and partitioned into a plurality of radial cavities 3c. It is formed in a shape.

The central part on the opposite side of the motor output shaft 1 is formed with an opening 33 by removing the disk 32 and the radial blades 3. The seawater SW is supplied to the opening 33 through the seawater supply pipe 4 and the high-speed rotating disk 2 is installed. For example, when rotating at a high speed of 10,000 revolutions per minute, seawater is sucked in the direction of arrow a1 by negative pressure due to centrifugal force, and is dispersed by each guide blade 3 when discharged from the outer periphery in the direction of arrow a2. When it is released from 2 and shaken out, it becomes a fine mist 5 and scatters. When hot air in the direction of arrow a3 is blown from the back to the fine mist 5 scattered in the direction of arrow a2, it is sent to the center of the salt making chamber, and the moisture in the fine mist evaporates to produce salt crystals.

The motor M is built in the hermetic casing 6, and the cylindrical salt-proof cover 7 is projected from the front wall 61 of the hermetic casing 6 to surround the output shaft 1 of the motor M. The gap G between the tip of the salt-proof cover 7 and the high-speed rotating disk 2 is made as small as possible so that the fine mist and salt content of seawater do not easily enter the output shaft 1 side. The shaft hole 8 provided in the front wall 61 of the hermetic casing 6 has a length L in the axial direction as long as possible and at least larger than the thickness of the front wall 61 so that a gap 8 generated between the shaft hole 8 and the output shaft 1 is formed. It is long. As a result, the resistance when salt or moisture tries to enter the sealed casing 6 from the front end side of the output shaft 1 is increased. Further, a disc-shaped blocking plate 9 is provided on the output shaft 1 outside the shaft hole 8. The dimensional relationship of the inner diameter of the saltproof cover 7> the outer diameter of the blocking disc 9> the inner diameter of the shaft hole 8> the outer diameter of the output shaft 1 is established. As a result, it is possible to prevent the liquid containing salt from entering the shaft hole 8 side along the outer periphery of the output shaft 1. On the other hand, the sealed casing 6 is provided with an inlet 10 for supplying compressed air into the sealed space inside.

When starting the motor M, compressed air is sent into the sealed casing 6 from the inlet 10 at the same time as or before starting, and the inside of the sealed casing 6 is kept at a higher pressure than the outside air. As a result, compressed air is blown out from the minute gap between the shaft hole 8 and the output shaft 1 toward the blocking plate 9, and salt can be prevented from entering from the gap 8. Further, since the length L of the shaft hole 8 is larger than the thickness of the front wall 61 of the sealed casing 6, the resistance when salt enters from the gap 8 is increased, and the salt entry is more effectively prevented.

The compressed air blown out from the gap with the shaft hole 8 is blown out through the gap G between the salt-proof cover 7 and the high-speed rotating disk 2, so that mist and other salt enter the inside of the salt-proof cover 7 through the gap G. Can be suppressed. In the unlikely event that a liquid is transmitted along the surface of the output shaft 1 and enters the shaft hole 8, the blocking plate 9 is located in front of the shaft hole 8. It is extremely difficult to reach the side, and salt can be effectively prevented from entering the shaft hole 8 along the surface of the output shaft 1. Further, since the compressed air blown out from the gap in the shaft hole 8 hits the blocking plate 9 and moves to the outer peripheral side, the wind pressure at this time causes the salt-containing liquid to pass over the blocking plate 9 to the shaft hole 8 side. It is possible to effectively suppress movement.

As shown in FIG. 2, a stirring fan f is provided on the output shaft 1 between the blocking plate 9 and the high-speed rotating disk 2. The saltproof cover 7 is provided with four compressed air inlets 11 at intervals of 90 degrees, for example. The inlet 11 is provided between the stirring fan f and the blocking plate 9, but may be provided closer to the front wall 61 of the sealed casing as long as the outer diameter of the blocking plate 9 is not large. As a result, in addition to the compressed air sent from the inlet 10 blowing out from the gap between the shaft hole 8 and the output shaft 1, the compressed air is also sent from the inlet 11 of the salt prevention cover 7. These compressed airs make the inside of the salt-proof cover 7 high in pressure, then pass between the stirring fan f and the salt-proof cover 7 and blow out to the outside through the gap G at the tip of the salt-proof cover 7. At this time, the inside of the salt-proof cover 7 is stirred by the rotation of the stirring fan f, and the entire inside of the salt-proof cover 7 is maintained at a high pressure uniformly including the area where the compressed air inlet 11 does not exist. Even if salt enters the anti-salt cover 7 from the gap G, or even if it enters, it can be reliably prevented from moving to the shaft hole 8 side.

In general, the motor M covers a mechanism part constituting the motor with a motor cover Mc. In the present invention, in order to supply compressed air also into the motor cover Mc, the inlet 12 is provided and led out of the sealed casing 6. Then, by supplying compressed air to the inside of the motor cover Mc to fill it, salt enters from the bearing portion of the motor cover Mc to the motor mechanism portion, or grease or the like of the bearing portion deteriorates due to salt damage. Is preventing.

As described above, compressed air is supplied to at least three of the compressed air inlets 10, 11, and 12. The timing for starting the supply of compressed air is first from the inlet 12 into the motor cover Mc. Is supplied and filled, and then compressed air is supplied into the sealed casing 6 from the inlet 10 to be filled. Finally, compressed air is supplied from each inlet 11 into the salt-proof cover 7, but the motor M is started to operate the stirring fan f so as to keep the pressure inside the salt-proof cover 7 constant. . As described above, compressed air can be supplied to the inside of the motor cover Mc, the inside of the hermetic casing 6, and the three locations near the shaft hole 8 in the salt-proof cover 7, but in this way, the three locations are supplied. When doing so, it is desirable to set the height of each air pressure so that the inside of the motor cover Mc> the inside of the hermetic casing 6> the shaft hole 8 side of the salt prevention cover 7. The above compressed air inlets 10, 11, and 12 do not necessarily need to be equipped with all of these, and only one or two of them may be provided. In the illustrated example, the water wheel-shaped high-speed rotating disk 2 with the radial cavity 3c by the guide vanes 3 is shown. However, the same effect can be obtained by using a concave-curved high-speed rotating disk as shown in FIGS. .

In the salt making room using fine mist of seawater, the hot air in the direction of arrow a3 is constantly applied to the fine mist 5 from the back of the high-speed rotating disk 2, so that the pressure is always high, and the inside of the fine mist generating motor M is Relatively negative pressure. As a result, although fine mist and salt water of seawater in the salt making room are likely to enter, the compressed air is supplied from each of the inlets 10, 11, and 12 and maintained at a high pressure state as described above to enter the motor cover Mc. Infiltration of fine mist and salt water can be prevented.

The above is a structure that suppresses deterioration due to salt damage such as the bearing part and the motor mechanism part. FIG. 3 is a structure that suppresses deterioration of the bearing by reducing the load acting on the bearing, and is a high-speed rotation for generating fine fog. FIG. 6 is a longitudinal sectional view at the center position of a plate 13. The high-speed rotating plate 13 is a circular plate made of aluminum or other metal or synthetic resin, and has a shape in which a part of a sphere is taken out in a circular shape. Then, the high-speed rotating plate 13 is rotated at a high speed such as 10,000 rotations per minute by the motor M while supplying the seawater SW to the center C of the concave curved surface 13i by the seawater supply pipe 4. As a result, the seawater SW supplied to the center C is sent to the outer peripheral side along the concave curved surface 13i of the high-speed rotating plate by centrifugal force, and finally shaken off from the outer peripheral end.

At this time, since it is shaken off from the outer periphery by the high-speed rotational force of the high-speed rotating plate, it becomes a fine mist 5 of seawater. In addition, since the seawater supply side of the high-speed rotating plate 13 has a concave curved surface and is recessed, when seawater adhering to the concave curved surface 13i diffuses by centrifugal force, the force that adheres to the concave curved surface by centrifugal force is exerted. Since it acts on seawater, the seawater is sent to the outer periphery while being securely attached and held on the concave curved surface 13i. As a result, the centrifugal force is reliably received from the high-speed rotating plate and discharged from the outer periphery. Since it is shaken off and released with high frequency by high-speed rotation, it becomes a fine mist 5 and scatters. Moreover, since it is gradually stretched into a thinner film as it moves to the outer peripheral side having a larger area by centrifugal force, it eventually scatters as a finer fine mist 5.

FIG. 4 is a plan view of the high-speed rotating plate 13 shown in FIG. 3, in which innumerable guide grooves 14 are radially formed near the outer periphery of the concave curved surface 13i. Therefore, the seawater film pushed to the outer peripheral side along the concave curved surface 13i flows into each guide groove 14, and is swept away from the outer periphery by centrifugal force in the guide groove 14 to the outer peripheral side. Therefore, the seawater film adhering to the concave curved surface 13i is dispersed in the many guide grooves 14, and as a result, it becomes a fine mist and scatters from the outer periphery. Therefore, the guide grooves 14 should be as many as possible. The length of the guide groove 14 in the radial direction is not particularly limited, but more grooves can be formed if provided near the outer periphery. In addition, the guide groove is not linear, and it is preferable that the seawater film rotating at high speed is curved in a direction in which it can easily flow due to the centrifugal force as in 14c.

A convex shape is also effective in place of the guide grooves 14 and 14c. FIG. 5 (1) shows the cross-sectional shape of the grooves 14 and 14c of FIG. 4, and (2) shows the cross-sectional shape when the convex shape 16 is provided. When the radial ridge 16 is used instead of the groove, the ridge 16 serves as a wall, and the seawater film flows along the ridge 16, so that the same guide action as that of the guide groove is obtained. However, it is difficult to form only the grooves or only the ridges, and when the grooves are machined into the disk with a blade, the ridges 16 rise on both sides of the groove 14 (14c) as shown in (3). It is normal. By devising how to apply the blade, the ridge 16 can be raised only on one side of the groove 14 (14c) as shown in (4). In this way, when the guide groove is formed, a ridge may be incidentally formed, or only the ridge may be formed specially.

FIG. 6 shows an example in which an infinite number of separating means are provided at the outer peripheral edge instead of the guide groove 14 and the ridge 16. For example, a thin and short piano wire is integrated on the outer periphery of the high-speed rotating plate 13. FIG. 6 (1) is a side view showing an example in which the separating means is provided using a mesh with fine mesh. The mesh 15 is wound around the outer periphery of the high-speed rotating plate 13 and fixed by brazing or bonding. Next, when it is cut with scissors at the position of the chain line AA so as to remain in a state of projecting, for example, a length of about 1 mm from the outer peripheral side of the concave curved surface 13i, the outer periphery of the concave curved surface 13i as shown in FIG. At the end, an infinite number of wires 15w are fixed in a state of standing at a constant minute interval. In addition, when it is difficult to cut at the A-A position, the cut may be performed with, for example, two to three meshes remaining. Alternatively, a net having a small width corresponding to several meshes may be wound around the outer periphery of the high-speed rotating plate 13 from the beginning and brazed or adhered to be fixed.

In this state, when the high-speed rotating plate 13 rotates at a high speed, the seawater supplied to the center of the concave curved surface 13i is diffused toward the outer periphery by centrifugal force and hits the innumerable wires 15w on the outer periphery in a thin film state. It is dispersed innumerably and discharged from between the wires 15w. At this time, the high-speed rotating plate 13 is released at a high frequency by the high-speed rotation and is repeatedly shaken off, so that it is scattered as a fine mist. As described above, by providing countless wire rods 15w at fine intervals on the outer periphery of the high-speed rotating plate 13, it is possible to easily realize fine mist generated by swinging off by high-speed rotation. Therefore, the high-speed of the conventional water wheel type radial cavity 3c can be realized. Unlike the structure in which seawater is dispersed to form a fine mist by rotation, the fine mist 5 can be generated smoothly from the outer periphery even if the rotation is not so high and the centrifugal force is relatively small. If it is not necessary to rotate at such a high speed, the life of the bearing of the motor is further increased. In addition, the same effect is produced also in the case of the guide grooves 14 and 14c and the protrusion 16 as shown in FIG.

As described above, the high-speed rotating plate 13 has a suction pressure in the direction of the arrow a1 due to centrifugal force at the center of the high-speed rotating plate 13, unlike the water wheel structure having the radial cavities 3c formed by many guide vanes 3 as shown in FIG. Since this does not occur, the problem that the external force of the motor shaft in the thrust direction is not received, a load is applied to the motor bearing, and the life of the bearing is shortened is solved. Unlike the water wheel structure composed of radial cavities, the disk-shaped high-speed rotating plate 13 does not have a strong spray force of fine mist from the outer periphery, so that the motor output shaft of seawater fine mist caused by blowing hot air from the back Splash detours to the side are also reduced. In FIG. 3, the motor shaft is oriented vertically, but it goes without saying that the high-speed rotating plate 13 can be used upright as shown in FIGS.

As described above, when the high-speed rotating plate 13 is used upright by leveling the output shaft 1 of the motor M in FIG. 3, the seawater SW that has come out of the seawater supply pipe 4 is drawn from the front center of the high-speed rotating plate 13. There is a risk that it will flow down and become useless, and the supplied seawater SW as a whole cannot be smoothly used as the fine mist 5. Therefore, as shown in FIG. 7, a radial cavity 31c is provided at a radial intermediate position of the concave curved surface 13i of the high-speed rotating plate 13, or a radial blade is provided on the center side as shown in FIGS. It is effective.

In the case of FIG. 7, as can be seen from the fact that the guide vane 31 is indicated by a broken line, there is a donut-shaped plate 17 at the radial intermediate position of the concave curved surface 13 i, and this donut-shaped plate 17 and the concave curved surface 13 i. A large number of radial cavities 31c are formed by sandwiching and fixing a large number of guide vanes 31 therebetween. As a result, when the high-speed rotating plate 13 rotates while standing as shown in FIG. 1, the seawater SW supplied to the central portion C of the concave curved surface 13 i is caused by the high-speed rotation of the radial guide vanes 31. It is emitted from the outer end of the radial cavity 31c while being uniformly distributed over the entire circumference.

Therefore, when the radial cavities 31c in the middle of the radius rotate at high speed, the seawater SW is sucked together with the air by centrifugal force and released in the radial direction on the same principle as the high speed rotating disk 2 of the water wheel type. Along with the centrifugal force, the film is gradually stretched to become a thin film, and finally shaken off from the outer peripheral edge to become a fine mist 5. As is clear from FIG. 3, the fine mist 5 may stagnate around the front surface of the concave curved surface 13i, and thus the fine mist muddy on the front surface of the concave curved surface 13i is formed in the radial cavity 31c as described above. There is also an effect that the suction is performed by the centrifugal force due to the suction force in the direction of the arrow a1 and the gas is discharged from the outer end of each radial cavity 31c.

As described above, because the seawater SW is sucked together with the air, it is necessary to dispose the inner ends of the radial guide vanes 31... Near the central portion C of the high-speed rotating plate 13 to which the seawater SW is supplied. It is desirable that the outer peripheral position of the doughnut-shaped plate 17 is arranged closer to the center C than the half position of the radius of the high-speed rotating plate 13. That is, it is desirable to make the radius of the donut-shaped plate 17 smaller than ½ of the radius of the high-speed rotating plate 13. In order to ensure a sufficient radial path to stretch the seawater discharged from the radial cavity 31c into a membrane along the concave curved surface 13i so that the suction force due to centrifugal force is not too large as in the prior art. is there. The width W in the radial direction of the doughnut-shaped plate 17 is sufficient if it does not exceed 1/2 of the radius of the high-speed rotating plate 13. This is to prevent the suction force due to the centrifugal force by the radial cavity 31c from being too large. The outer diameter of the high speed rotating plate 13 is suitably about 25 to 40 cm.

Thus, when the radial cavity 31c... Is provided in the middle of the radius of the concave curved surface 13i, the outer diameter becomes small, so that the suction force due to the centrifugal force is too strong as in the conventional high speed rotating disk 2 of the water turbine type. The problem is solved. On the other hand, in FIG. 8 and FIG. 9, for example, six blades 18 are fixed in the radial direction (or radial direction) near the central portion C of the concave curved surface 13i. In this case, since the radial cavities 31c of the water wheel type are not used, the front of the slat 18 may be left exposed. Now, the seawater SW supplied from the supply pipe 4 to the central portion C of the concave curved surface 13i as shown in FIG. 1 is dispersed all around by the radial blades 18 ... rotating at high speed. In a state of being uniformly dispersed over the entire surface of the film, it diffuses and flows out while gradually becoming a thinner film on the outer peripheral side, and becomes a fine mist 5.

Thus, it is not necessary to provide a large number of radial blades 18 provided so as to surround the inflow portion of the seawater SW near the central portion C of the concave curved surface 13i. A simple rectangular shape is sufficient. In the state where the radial blades 18 near the central portion C of the concave curved surface 13i are provided, it is possible to use a structure in which the water wheel type guide blades 31 are provided only on the outer peripheral side as shown in FIG. And become more effective. Moreover, the structure of FIGS. 7-9 can also be used together with the structure of FIGS.

12 to 14 show an improved air seal structure of the embodiment shown in FIG. 2, which is an example applied to the motor shaft shown in FIGS. 10 and 11. FIG. 10 is a side view of a normal motor, and FIG. 11 is a front view of the motor. In order to prevent foreign matter such as salt and moisture from entering from a gap between the output shaft 1 of the motor and the bearing side, When an improved air seal structure is mounted, it becomes as shown in FIGS. FIG. 12 is a longitudinal sectional view of the motor output shaft 1 in the axial direction. An air seal seal housing 20 is provided between the front wall M61 of the motor casing 6 and the output shaft 1, and is fixed to the front wall M61 side. It is.

In the seal housing 20, a capacitor chamber 21 made of a ring-shaped cavity is opened, and an air inlet 22 for supplying compressed air is opened in the outer peripheral portion. The condenser chamber 21 and the annular air seal space 23 on the outer periphery of the output shaft communicate with each other through a large number of small holes 24 in the radial direction. The radial small holes 24... Are inclined by an angle α with respect to the output shaft 1 (the core thereof), thereby directing the jet flow indicated by the arrow a4 toward the distal end of the output shaft 1. As a result, it is possible to effectively prevent the entry of foreign substances such as gases, salt, moisture, and dust that are about to enter the air seal space 23 side from the front end side of the output shaft 1 by the jet flow. Therefore, foreign matter does not enter the inside of the motor or the bearing portion. The surface around the outlet of the radial small holes 24 of the seal housing 20 is substantially perpendicular to the radial small holes 24, but the jet flow indicated by the arrow a4 is guided in the distal direction of the output shaft 1. As such, the exit surface may be slightly raised.

When showing the dimensional relationship of each part, the inner diameter of the air seal space 23> the inner diameter of the bearing hole of the seal housing 20> the outer diameter of the output shaft 1. The dimensional difference between the outer diameter of the output shaft 1 and the inner diameter of the bearing hole of the seal housing 20, that is, the gap is preferably about 1 mm or less, but is not particularly limited. The dimensional difference between the inner diameter of the air seal space 23 and the inner diameter of the bearing hole, that is, the radial dimension of the air seal space 23 is about 1 to 2 mm, but is not particularly limited. The flange 1f at the base of the output shaft 1 is not always necessary.

FIGS. 13 and 14 are cross sections taken along the path of the air inlet 22 -capacitor chamber 21 -radial small hole 24 -air seal space 23 -output shaft 1, and the outer end of the radial small hole 24 ... Communicates with the capacitor chamber 21, and the inner end communicates with the air seal space 23. FIG. 13 is for right rotation, and the inner ends of the radial small holes 24 are inclined by an angle β so as to face the right direction that is the rotation direction of the output shaft 1. As a result, the jet flow ejected from each of the small radial holes 24 becomes a rightward flow similar to the rotation direction of the output shaft 1 and circulates in a vortex flow without interruption in the air seal space 23 outside the output shaft 1. is doing. Therefore, it is impossible for foreign matter such as moisture and dust from the outside to pass through the air seal space 23 and enter the motor.

For the left rotation in FIG. 14, the inner ends of the radial small holes 24 are inclined by an angle −β so as to face the left direction that is the rotation direction of the output shaft 1. As a result, the jet flow ejected from each of the radial small holes 24 is a leftward flow similar to the rotation direction of the output shaft 1 and circulates in a vortex in the air seal space 23 outside the output shaft 1. . Therefore, foreign matters such as gases, moisture, oils and the like enter through the gap between the motor output shaft 1 and the fixed portion, and it is possible to more reliably prevent the bearing from being deteriorated and damaged and the coil from being deteriorated in insulation. Further, after the capacitor chamber 21 is once filled and accumulated, compressed air is injected from the radial small holes 24 to the output shaft 1 and sealing is performed with the compressed air. Therefore, the rotating portion of the output shaft 1 and the housing No frictional heat is generated. Further, even when the motor is stopped, the entry of foreign matter can be prevented by supplying compressed air. In addition, by increasing the discharge pressure of the compressed air from each of the radial small holes 24, it can be used even under water or at high atmospheric pressure.

As described above, the fine mist generation motor of the present invention extends the life of a motor that drives at high speed by suppressing the deterioration of the bearing of the fine mist generation motor and the motor interior due to salt damage and mechanical loads in the thrust direction. Therefore, it is possible to reduce the running cost of an expensive salt making apparatus and supply a cheaper mineral salt.

(1) is a longitudinal sectional view showing a first embodiment of a fine mist generating motor according to the present invention, and (2) is a longitudinal sectional view of a water turbine type high-speed rotating disk in FIG. It is a longitudinal cross-sectional view which shows 2nd Embodiment of the fine mist generating motor by this invention. It is a longitudinal cross-sectional view of the fine fog generator which consists of a disk-shaped high-speed rotary plate. FIG. 4 is a plan view of the high-speed rotating plate in FIG. 3, and is an embodiment in which a linear or curved guide groove is provided. FIG. 5 is a cross-sectional view showing various cross-sectional shapes of the guide groove and the ridge shown in FIG. 4. It is a side view which shows the manufacturing method of the high-speed rotary plate which has an infinite number of isolation | separation means in an outer peripheral end, (1) is in the middle of manufacture, (2) is a completion state. It is a top view of embodiment which provided the radial cavity in the radial direction middle of the concave curved surface of the high-speed rotation board. It is a perspective view of an embodiment which provided a slat in the radial direction near the center. It is a front view of embodiment of FIG. It is a side view of a normal motor. It is a front view of the motor of FIG. It is a longitudinal cross-sectional view of the axial center direction of the motor output shaft of a seal housing. It is sectional drawing (for right rotation) of the seal housing in the path | route of an air inflow port-capacitor chamber-radial small hole-air seal space-output shaft. It is sectional drawing (for left rotation) of the seal housing in the path | route of an air inflow port-capacitor chamber-radial small hole-air seal space-output shaft.

Explanation of symbols

1 Motor output shaft
2 High-speed rotating disk 3 Guide vane
3c Radial cavity 4 Seawater supply pipe
C Central part 5 Fine fog
6 Sealed casing
61 Front wall
7 Salt protection cover
8 Shaft hole
9 Blocking disc
Mc Motor cover 10, 11, 12 Compressed air inlet
13 High-speed rotating plate 13i Concave curved surface 14, 14c Guide groove 15 Net 15w Wire material 16 Convex line 17 Donut-shaped plate
31 guide vane
31c Radial cavity 18 Radial blade 20 Seal housing 21 Capacitor chamber 22 Compressed air inlet 23 Air seal space 24 Radial hole

Claims (12)

A salt-proof cover means is provided to surround the output shaft of a motor for generating fine mist of seawater, and the motor itself is housed in a sealed space, and compressed air is supplied into the sealed space. A fine mist generating motor. The fine mist generating motor according to claim 1, wherein a blocking means having a diameter larger than the outer diameter of the motor output shaft is provided on the outer periphery of the motor output shaft in the salt prevention cover means. The stirring salt fan is provided in the motor output shaft in the salt prevention cover means, and one or more compressed air inlets are provided between the stirring fan and the shaft hole. Fine mist generation motor. 4. The fine mist generating motor according to claim 1, wherein compressed air is supplied to the inside of the motor cover means in the sealed space. A small hole in the radial direction for injecting compressed air toward the outer periphery of the output shaft is provided in a seal housing that serves as a salt-proof cover means that surrounds the output shaft of a motor for generating fine mist of seawater. 2. The fine mist generating motor according to claim 1, wherein the outer end of the hole can communicate with a compressed air source. A capacitor chamber formed of a ring-shaped cavity is formed in the seal housing so as to surround the output shaft, and is interposed between each outer end of the radial small hole and a compressed air source. The fine mist generating motor according to claim 5. By inclining the inner end of the radial small hole toward the distal end side of the output shaft, the air flow ejected from the radial small hole is ejected to the distal end side of the output shaft, and the inner end of the radial small hole is 6. The structure according to claim 5, wherein the air flow ejected from the radial small hole becomes a vortex-like circulation flow in the same direction as the rotation direction of the output shaft by being inclined toward the rotation direction of the output shaft. Or the fine mist generating motor of Claim 6. A fine mist generating motor characterized in that a high-speed rotating plate for generating fine mist of seawater driven by a motor is formed into a concave curved surface and seawater is supplied to the central portion thereof. The fine mist generating motor according to claim 8, wherein a large number of radial guide grooves and / or ridges are provided on at least the outer peripheral side of the concave curved surface of the high-speed rotating plate. The fine mist generating motor according to claim 8 or 9, wherein a separation means having a narrow net or other fine interval is provided on the outer periphery of the concave curved surface of the high-speed rotating plate. A donut-shaped plate is provided at a radial intermediate position of the concave curved surface of the high-speed rotating plate, and a large number of radial cavities are formed between the donut-shaped plate and the concave curved surface with a large number of radial blades interposed therebetween. The fine mist generating motor according to claim 8, 9, or 10. The radial blades are provided near the central portion of the concave curved surface of the high-speed rotating plate so as to surround the inflow portion of the seawater, according to claim 8, 9, 10, or 11. The fine mist generating motor described.

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