JP2011052637A - Fluid dispersion pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluid dispersion pump capable of carrying dispersed fluid while dispersing two fluids, gas and liquid in particular. <P>SOLUTION: The pump includes an impeller 48 which keeps a centrifugal blade on one surface of a disk-shaped body part and which sucks and discharges liquid, a motor 12 which has one end in an axial direction connected to the impeller 48 and which rotates the impeller, a circulation blade 52 which is provided to the other surface side of the impeller body part 50 and which rotates coaxially with a rotary shaft 17 of the impeller, a casing 39 which demarcates an accommodation chamber 40 accommodating the impeller 48 and circulation blade 52 and containing a suction and discharge ports of liquid and a suction port of gas, and an annular bubble dispersion part 53 which is arranged so as to be adjacent to the impeller 48 and circulation blade 52 in the circulation space 42 with respect to the centrifugal blades of the impeller in the accommodation chamber 40 and which is provided with a flow path 56 opened from an extending position in a centrifugal direction of the circulation blade 52 and expanded as separated from the circulation blade 52. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a fluid dispersion pump for delivering two fluids while dispersing two fluids such as a gas and a liquid.

  In the industrial field, operations for dispersing two fluids and further transporting the dispersed fluid are widely performed.

  In particular, in recent years, for example, in the field of gas dispersion in liquids, with the diversification of processes, there has been an increasing demand for finer gas dispersion in liquids in order to increase the efficiency and speed of reactions. ing.

  Various types of microbubble generators for miniaturizing bubbles have been proposed in Non-Patent Document 1 and the like. For example, (a) channel expansion method using a Venturi tube or the like (see Non-Patent Document 2 and Patent Document 1), (b) Supersaturated precipitation method of pressurized dissolved gas (pressurized dissolution method), (c) Swivel There are a bubble bubble shearing method (swirl flow method), (d) a high-pressure opening method using an orifice or the like, (e) a gas discharging method from a fine hole, and (f) a bubble breaking method using ultrasonic waves or a machine.

  Both methods devise various methods for generating bubbles and destroying generated bubbles. In particular, the methods (a) to (d) are based on pressure fluctuations and water flow, the method (e) is by reducing the diameter of the gas discharge hole, and the method (f) is a power other than water flow (medium This is due to vibration or mechanical shearing.

JP2003-230824

Hirofumi Taisei, “Basics of Microbubbles”, Foam Engineering, 2005, pp. 423-429 Reiko Fujiwara, “Microbubble generation method using Venturi tube”, Eco-Industry, 2006, Vol. 11, no. 3, 27-30

  Each of these various methods has advantages and disadvantages, but a particular problem is the need for a pump to generate pressure. For example, in the method (a), the gas-liquid mixed fluid is conveyed to the venturi tube, in the methods (b) and (d) for pressurization, in the method (e), the fluid is passed through the fine holes, etc. Each requires a pump to pressurize the fluid.

  Furthermore, in the various methods described above, a separate pump is required for flowing the gas-liquid dispersion fluid in which bubbles are refined and dispersed into a reaction vessel or the like according to the purpose of use. That is, a pump is required to create the fine bubbles and to transport the gas-liquid mixed flow in which the fine bubbles are created. As a result, there has been a problem that the apparatus is enlarged as a whole.

  Therefore, the technical problem to be solved by the present invention is to provide a fluid dispersion pump capable of feeding two dispersion fluids while dispersing two fluids.

  In order to solve the above technical problem, the present invention provides a fluid dispersion pump having the following configuration.

According to the first aspect of the present invention, an impeller that is rotatably supported and sucks and discharges a first fluid having a centrifugal blade on one surface of a disk-shaped main body portion;
One axial end is connected to the impeller, and the motor rotates the impeller;
A circulation blade that is provided on the other surface side where the centrifugal blade is not provided with respect to the impeller body, and rotates coaxially with the rotation shaft of the impeller;
A housing in which the impeller and the circulation blade are accommodated, and a housing chamber is defined in which a first fluid supply port, a dispersion fluid discharge port, and a second fluid supply port are defined;
A flow path that is disposed adjacent to the impeller and the circulation blade in a circulation space on the back side with respect to the centrifugal blade of the impeller in the storage chamber, and that opens from a centrifugally extending position of the circulation blade and expands away from the circulation blade. An annular dispersion section provided with
A fluid dispersion pump is provided.

  According to the second aspect of the present invention, the flow path is configured such that the cross-sectional area gradually decreases as the distance from the circulation blade decreases, and the cross-sectional area of the flow path gradually increases. A first aspect of the present invention is characterized by comprising a flow path expanding portion configured to, and an annular slit including a circular gap minimum portion at a connection portion between the flow path reducing portion and the flow path expanding portion. A fluid dispersion pump is provided.

  According to a third aspect of the present invention, there is provided the fluid dispersion pump according to the first or second aspect, wherein the circulation blade is configured to be larger than the centrifugal blade.

  According to a fourth aspect of the present invention, there is provided the fluid dispersion pump according to any one of the first to third aspects, wherein the circulation blade is provided on the other surface of the impeller body. To do.

  According to a fifth aspect of the present invention, any one of the first to fourth aspects is characterized in that the circulation blade is provided on a circulation blade support portion provided to face the impeller body portion. One fluid dispersion pump is provided.

According to a sixth aspect of the present invention, the dispersing unit is
Consists of a plurality of plate-like members provided facing each other,
A fluid dispersion pump according to any one of the first to fifth aspects is provided, wherein a gap between these plate-like members is defined as the flow path.

  According to a seventh aspect of the present invention, there is provided the fluid dispersion pump according to the sixth aspect, wherein at least one of the plate-like members constituting the dispersion part constitutes the impeller body part.

According to the eighth aspect of the present invention, the plate-like member that constitutes the dispersion portion is configured in an annular shape and is disposed adjacent to the outer diameter side of the impeller body portion,
Furthermore, the plate-like member and the impeller main body arranged adjacent to each other are provided with a leakage prevention mechanism for preventing fluid from leaking from between the plate-like member and the impeller main body. The fluid dispersion pump according to the sixth aspect is provided.

  According to a ninth aspect of the present invention, the leakage prevention mechanism is a projecting edge portion provided to face the opposing surfaces of the plate member and the impeller body portion arranged adjacent to each other. The fluid dispersion pump according to the eighth aspect is provided.

  According to a tenth aspect of the present invention, the leakage prevention mechanism is provided in the impeller body that opens from the opposing surface of the adjacent plate-like member and the impeller body and extends to a central portion of the impeller. The fluid dispersion pump according to the eighth or ninth aspect is provided.

  According to an eleventh aspect of the present invention, in the eighth aspect, the leakage prevention mechanism is configured to have an uneven shape that meshes the opposing surfaces of the plate member and the impeller body portion arranged adjacent to each other. A fluid dispersion pump is provided.

  According to a twelfth aspect of the present invention, in the eleventh aspect, the leakage prevention mechanism is a double orifice provided on the opposing surface of the adjacent plate member and the impeller body. A fluid dispersion pump is provided.

  According to a thirteenth aspect of the present invention, there is provided the fluid dispersion pump according to the eighth aspect, wherein the leakage prevention mechanism is a leakage prevention blade provided in the circulation blade support portion.

  According to a fourteenth aspect of the present invention, the fluid dispersion pump according to any one of the first to thirteenth aspects, wherein the motor is a canned motor including a rotor that rotates coaxially with a rotation shaft of the impeller. I will provide a.

  According to the present invention, the storage chamber is partitioned by the impeller body provided in the storage chamber of the housing. In the storage chamber, the rotation of the impeller centrifugal blades imparts a pressure distribution to the fluid so that the pressure increases as the distance from the rotation axis increases. Due to this pressure distribution, the fluid flows in the centripetal direction with respect to the impeller body in the circulation space where the centrifugal blade is not provided. Further, since the fluid moved in the centripetal direction can be sent out in the centrifugal direction to the impeller body by the rotation of the circulation blade provided in the circulation space, the fluid circulates in the centripetal direction and the centrifugal direction in the circulation space. Will be. Moreover, since the dispersion | distribution part is arrange | positioned adjacent to the impeller and the circulation blade | wing, the force given to the fluid by rotation of the circulation blade | wing can be used as a motive power for passing the flow path of a dispersion | distribution part. For this reason, it is possible to easily pass the fluid through the flow path of the dispersion portion, and it is possible to easily adjust the conditions for miniaturizing and dispersing the bubbles.

  In particular, since the flow path is disposed so as to open from the extending position of the circulation blade in the centrifugal direction, it is easy to use the centrifugal force provided by the rotation of the circulation blade as a driving force for efficiently passing through the flow path. can do.

  According to the 2nd aspect of this invention, the flow path of a dispersion | distribution part exhibits the effect similar to a venturi pipe, and the bubble in fluid can be refined | miniaturized, when the fluid is a gas-liquid mixed fluid. The specific configuration of the flow path may be an annular slit or a simple duct.

  According to the third aspect of the present invention, by making the circulation blade larger than the centrifugal blade, a pressure larger than the pressure given by the rotation of the centrifugal blade can be given to the circulation flow, and the fluid in the circulation space Can be easily guided to the outlet side.

  According to the 4th aspect of this invention, a storage chamber can be reduced more in size by providing a circulation blade | wing on the other surface side of an impeller main-body part.

  According to the fifth aspect of the present invention, it is possible to adjust the attachment position of the circulation blade according to the position of the dispersion portion by providing the circulation blade on the circulation blade support portion configured separately from the impeller.

  According to the sixth aspect of the present invention, the flow path of the dispersion section can be created with a simple configuration. Further, by sharing one plate-like member with the impeller main body, the apparatus can be reduced in size.

  According to the 8th aspect of this invention, the thickness dimension of a storage chamber can be made small by comprising one plate-shaped member cyclically | annularly and providing in the outer-diameter side of an impeller main-body part. Further, by providing the leakage prevention mechanism, it is possible to prevent the fluid from leaking through the gap between the impeller body and the plate member.

  Specific examples of the leakage prevention mechanism include a configuration in which a projecting edge is provided on the opposing surface of the plate-like member and the impeller main body to lengthen the flow path formed in the gap between the two, a double orifice, etc. For example, a configuration that increases the passage resistance of the gap, such as a configuration in which the opposing surface is uneven. Moreover, the structure etc. which provide a pipe line and return the fluid which exists in a clearance gap to the center part side again are mention | raise | lifted. Furthermore, you may employ | adopt the structure which provides the leakage prevention blade | wing different from a circulation blade | wing.

  According to the fourteenth aspect of the present invention, there is no risk of liquid leakage due to the characteristics of the canned motor, it can be installed at any installation location, and can be used in high temperature, high pressure and high vacuum systems.

It is sectional drawing of the gas-liquid dispersion pump concerning 1st Embodiment of this invention. It is the elements on larger scale of the liquid supply bubble dispersion | distribution part of the gas-liquid dispersion | distribution pump of FIG. It is the elements on larger scale of the storage chamber of the gas-liquid dispersion | distribution pump of FIG. It is the elements on larger scale of the gas-liquid dispersion | distribution pump concerning 2nd Embodiment of this invention. It is the elements on larger scale of the gas-liquid dispersion | distribution pump concerning 3rd Embodiment of this invention. It is the elements on larger scale of the gas-liquid dispersion | distribution pump concerning 4th Embodiment of this invention. It is the elements on larger scale of the gas-liquid dispersion | distribution pump concerning 5th Embodiment of this invention. It is the elements on larger scale of the gas-liquid dispersion pump concerning 6th Embodiment of this invention. It is the elements on larger scale of the gas-liquid dispersion pump concerning 7th Embodiment of this invention. It is the elements on larger scale of the gas-liquid dispersion | distribution pump concerning 8th Embodiment of this invention. It is the elements on larger scale of the gas-liquid dispersion | distribution pump concerning 9th Embodiment of this invention. It is the elements on larger scale of the gas-liquid dispersion pump concerning 10th Embodiment of this invention. It is the elements on larger scale of the gas-liquid dispersion | distribution pump concerning 11th Embodiment of this invention. It is the elements on larger scale of the gas-liquid dispersion | distribution pump concerning 12th Embodiment of this invention. It is the elements on larger scale of the gas-liquid dispersion | distribution pump concerning 13th Embodiment of this invention. It is the elements on larger scale of the gas-liquid dispersion | distribution pump concerning 14th Embodiment of this invention. It is the elements on larger scale of the gas-liquid dispersion pump concerning 15th Embodiment of this invention.

  Hereinafter, a gas-liquid dispersion pump according to an embodiment of the fluid dispersion pump of the present invention will be described with reference to the drawings. In the following, each embodiment describes a gas-liquid dispersion pump that uses liquid as the first fluid and gas as the second fluid and disperses the gas in the form of fine bubbles in the liquid and flows out. The dispersion pump is not limited to the gas-liquid dispersion pump, and includes a pump for dispersing the liquid in the liquid.

(First embodiment)
FIG. 1 is a cross-sectional view of a gas-liquid dispersion pump according to a first embodiment of the present invention. In FIG. 1, the gas-liquid dispersion pump 1 a disperses the gas supplied in the liquid as fine bubbles, and includes a canned motor 12 and a liquid-feeding bubble dispersion unit 13.

  The canned motor 12 includes a rotor 16 and a stator 26. A rotary shaft 17 is press-fitted and fixed to the rotor 16, and sleeves 18 and 19 and thrust collars 20 and 21 are attached to the front and rear portions of the rotary shaft 17, respectively. The rotary shaft 17 is rotatably supported by the front and rear bearings 22 and 23 via the sleeves 18 and 19 and the thrust collars 20 and 21. These bearings 22 and 23 are inserted and fixed in a front bearing box 24 and a rear bearing box 25, respectively.

  The front bearing box 24 is fixed to the front flange 28 surface of the stator frame 27 to which the stator 26 is inserted and fixed, and the rear bearing box 25 is liquid-tightly connected to the rear end surface 31 of the stator frame 27 via the gasket 30. Fastened and fixed.

  The rotor 16 is sealed by liquid-tight welding of a nonmagnetic thin cylindrical rotor can 33 and a side plate 34, and the stator 26 is nonmagnetic and thin cylindrical in shape with the end of the stator frame 27. The stator can 35 is welded in a liquid-tight manner, and the rotor 16 and the stator 26 are disposed to face each other via a can gap 36.

  The rear bearing box 25 is provided with a lubricating liquid inlet 37. In this embodiment, the lubricating liquid is a discharge liquid of the gas-liquid dispersion pump according to this embodiment, and is discharged from the lubricating liquid outlet 38 and supplied to the lubricating liquid inlet 37 through the lubricating liquid conduit 46.

  The casing 39 is fastened and fixed to the front bearing box 24 in a liquid-tight manner. The housing 39 and the front bearing box 24 define a storage chamber 40.

  The casing 39 is provided with a liquid supply port 44 and a liquid outlet port 43. The liquid supply port 44 is provided at the extended position of the rotating shaft 17 of the rotor 16, and the liquid outlet port 43 opens on a surface located in a direction intersecting the rotating shaft 17 of the housing 39.

  An impeller 48 is stored in the storage chamber 40. The impeller 48 is fastened to the tip of the rotating shaft 17 of the canned motor 12. As shown in FIGS. 1 and 2, the impeller 48 is a closed type centrifugal impeller, and a centrifugal blade for liquid feeding is provided inside an impeller main body 50 having a front cover on a rear surface portion of a disk-like impeller. 51 is provided. The centrifugal blade 51 is a blade extending radially from the center of the impeller 48, and the number of installed blades is determined by various conditions such as the amount of liquid fed.

  The impeller 48 is disposed in the storage chamber 40 so that a sufficient space is formed between the facing surface 24 a of the impeller body 50 of the front bearing box 24 and the impeller 48. The interior of the storage chamber 40 is divided into a liquid feeding space 41 and a circulation space 42 by the impeller main body 50. The liquid feeding space 41 conveys the fluid in the storage chamber 40 to the liquid outlet 43 side by the centrifugal blade 51 of the impeller 48, and in the circulation space 42, a part of the fluid discharged by the centrifugal blade 51 is liquid feeding space. It moves from 41 and circulates in the centrifugal direction and centripetal direction of the impeller body 50 by the pressure difference generated by the rotation of the centrifugal blade 51 of the impeller 48.

  The rotary shaft 17 is provided with a circulation blade 52 via a circulation blade support portion 58. The circulation blade support portion 58 is disposed in the circulation space 42. The circulation blade support portion 58 is a disk-like member provided so as to face the main body portion of the impeller 48, and includes the circulation blade 52 inside, that is, on the surface side that does not face the impeller 48.

  In the present embodiment, the circulation blade 52 is configured to have a larger diameter or a larger number of installations than the centrifugal blade 51, and the centrifugal force applied to the fluid by the rotation of the circulation blade 52 is centrifugal. It is larger than the blade 51.

  In the space between the facing surface 24a of the impeller main body 50 of the front bearing box 24 and the impeller 48, a bubble dispersion portion 53 is provided. The bubble dispersion part 53 is disposed so as to surround the outer region of the circulation blade 52. As shown in FIG. 3, the bubble dispersion portion 53 includes a bubble dispersion portion main body composed of two disks 54 and 55, and a gap between the opposing surfaces of these disks 54 and 55 serves as a dispersion flow path 56. Defined. That is, the dispersion channel 56 is formed in an annular shape over the entire circumference of the disks 54 and 55.

  As shown in FIG. 3, a tapered portion is formed on the facing surface on the side where the two disks 54 and 55 face each other so as to narrow from the inner diameter side toward the outer diameter side. The channel 56 is provided with a channel reducing portion 56a in which the gap of the dispersion channel 56 is reduced from the inner diameter side toward the outer diameter side. Further, a flow path expanding portion 56b is formed on the outer diameter side of the flow path reducing portion 56a, and the gap of the dispersion flow path 56 expands from the inner diameter side toward the outer diameter side. A gap minimum portion 56c in which the gap of the dispersion flow path 56 becomes the smallest is provided between the passage expanding portion 56b.

  As shown in FIG. 3, the two discs 54 and 55 are provided with partition portions 54 a and 55 a inward from the portion constituting the dispersion flow path 56. The circulation blade support portion 58 is accommodated between the partition portions 54 a and 55 a, and the dispersion flow path 56 is configured to extend along the centrifugal direction of the circulation blade 52.

  The partition part 55a is disposed close to the impeller 48, and a gap 42b generated between the partition part 55a and the impeller 48 is small. On the other hand, the partition 54 a is disposed so as to provide a gap 42 a larger than the gap 42 b between the partition 54 a and the front bearing box 24. Therefore, the bubble dispersion | distribution part 53 can guide the flow direction of the fluid so that the said clearance gap 42a may be passed.

  A gas supply flow path 45 provided as a pipe passing through the front bearing box 24 opens at a position close to the rotating shaft 17 in the liquid feeding space 41.

  Next, the operation of the gas-liquid dispersion pump 1a will be described with reference to FIGS. In the following description, the fluid supplied from the liquid supply port 44 is assumed to be liquid, and the fluid supplied from the gas supply flow path 45 and dispersed in the liquid in the bubble dispersion portion 53 is assumed to be air.

  As a premise for the operation of the canned motor 12, it is necessary that the storage chamber 40 and the dispersion chamber are filled with fluid. At this time, the air present in the fluid gas-liquid dispersion pump 1a is extracted from an air vent unit (not shown), and the fluid gas-liquid dispersion pump 1a is filled with liquid.

  The lubricating liquid supplied to the canned motor 12 is injected from the lubricating liquid injection port 37 as indicated by an arrow 81 to lubricate and cool the rear bearing 23 and pass through the can gap 36 to rotate the rotor 16 and the stator. 26, the front bearing 22 is lubricated and cooled, returned to the storage chamber 40, and discharged to the outside.

  When the rotating shaft 17 of the canned motor 12 rotates, the impeller 48 and the circulation blade 52 also rotate together to take in the liquid from the liquid supply port 44 as indicated by an arrow 90. As the impeller 48 rotates, the liquid is sent in the centrifugal direction from the rotating shaft 17, and a part flows out from the liquid outlet 43.

  The pressure distribution of the liquid in the storage chamber 40 is generated by the rotation of the impeller 48. As the distance from the rotating shaft 17 increases, the pressure increases. As shown in FIG. 3, the region A2 farther from the rotating shaft 17 has a higher pressure than the region A1 closer to the rotating shaft 17.

  The liquid that has not flowed out from the liquid outlet 43 moves from the liquid feeding space 41 to the circulation space 42, passes through the gap between the housing 39 and the bubble dispersion portion 53, and moves in the direction of the low-pressure side rotation axis. In the circulation space 42, since air is taken in from the gas supply channel 45, the fluid exists as a gas-liquid mixed fluid. Further, by rotating the circulation blade 52, the gas-liquid mixed fluid is drawn to the circulation blade 52 side through between the partition portion 54 a of the bubble dispersion portion 53 and the rotation shaft 17, and centrifugal force is generated by the rotation of the circulation blade 52. Is added.

  The gas-liquid mixed fluid to which the centrifugal force is applied by the rotation of the circulation blade 52 moves in the centrifugal direction of the circulation blade, and the flow path reducing portion 56a and the flow path of the dispersion flow channel 56 opened to the centrifugal direction position of the circulation blade. It passes through the enlarged portion 56b in order. Then, when the mixture of gas and liquid passes through the flow path reducing section 56a and the flow path expanding section 56b, the flow rate of the mixture of gas and liquid changes due to the change in the flow path gap, and the pressure changes. Refined.

  This gas refinement is mainly determined by the flow rate of the liquid, the amount of gas, the gap size of the gap minimum portion 56c and the flow path expanding portion 56b, and the like. For example, when the flow rate of the liquid is below a certain threshold value, the bubble diameter is not reduced, and sufficient miniaturization is not performed. In this case, the diameter of the bubbles to be refined can be adjusted mainly by the gap size between the gap minimum portion 56c and the flow path expanding portion 56a. On the other hand, when the flow velocity of the liquid is equal to or higher than the threshold value, the bubble diameter is reduced and sufficient miniaturization is performed. The channel expansion part 56b provided in the dispersion channel 56 exhibits the same effect as the Venturi tube, and the liquid accompanied by the gas passes through the dispersion channel 56 of the bubble dispersion unit 53, thereby miniaturizing the gas. be able to.

  The fine bubble dispersion moves to the outside of the bubble dispersion part 53 through the dispersion channel 56. As described above, since the circulation blade 52 is configured to have a larger diameter than the centrifugal blade 51, the fluid pressure given by the rotation of the circulation blade 52 is higher than the pressure given by the rotation of the centrifugal blade 51. It becomes pressure, moves to the liquid discharge port 43 side, and is discharged to the outside of the housing 39.

  The gas-liquid dispersion pump 1 a according to this embodiment has a mechanism in which a part of the fluid pressurized by the rotation of the centrifugal blade 51 in the storage chamber 40 causes a circulation flow behind the centrifugal blade 51. In addition, the air supplied to the circulation channel can be dispersed in the liquid as fine bubbles and flow out from the liquid outlet 43. That is, the gas-liquid dispersion pump 1a can carry the fluid and generate the fine bubbles with one apparatus. In addition, by providing the circulation vanes in the storage chamber, differential pressure can be generated even when used under pressurized conditions, and bubbles can be made finer.

(Second Embodiment)
FIG. 4 is a partially enlarged view of the gas-liquid dispersion pump according to the second embodiment of the present invention. In the gas-liquid dispersion pump 1b according to the second embodiment, one of the disks constituting the bubble dispersion portion 53 uses the impeller rear surface portion of the impeller body portion 50.

  The outer edge portion of the rear surface of the impeller main body 50 is configured to be thick, and the disk 55 of the bubble dispersion portion 53 is fixed in close contact with the thick portion 59. The gap between the opposing surfaces of the thick part 59 and the disk 55 forms a dispersion channel 56, and a channel reduction part 56a and a channel enlargement part 56b are formed.

  Further, the circulation blade 52 is not directly provided on the circulation blade support portion, but is directly provided on the inner diameter side of the thick portion on the rear surface of the impeller main body portion 50 where the centrifugal blade 51 is not provided.

  By adopting the above configuration, the circulation blade 52 is rotated by the rotation of the impeller 48 that constitutes a part of the bubble dispersion portion 53, and the gas-liquid mixed fluid is sent in the centrifugal direction along the rear surface of the impeller body 50. Moreover, the outer edge part of the impeller main-body part 50 comprises the dispersion | distribution flow path 56 as a bubble dispersion | distribution part, and a bubble is refined | miniaturized because a gas-liquid mixed fluid passes a dispersion | distribution flow path.

(Third embodiment)
FIG. 5 is a partially enlarged view of the gas-liquid dispersion pump according to the third embodiment of the present invention. The gas-liquid dispersion pump 1 c according to the third embodiment uses one of the disks constituting the bubble dispersion portion 53 using the impeller rear surface portion of the impeller body portion 50.

  In the gas-liquid dispersion pump 1 c according to the third embodiment, the bubble dispersion portion 53 is configured by a single disk-shaped plate member 55 and is configured to be adjacent to the circulation blade 52. The plate member 55 extends to the outer portion of the circulation blade 52, and is provided with a protrusion 60 that defines the minimum gap portion 56c of the dispersion flow channel on the entire outer portion.

  Since the gap size between the plate member 55 and the impeller main body 50 is different due to the protrusion 60, a flow path expanding portion and a flow path reducing portion are formed, and the gas-liquid mixed fluid that has passed through the portion is used as the fine bubble dispersion. Can do.

(Fourth embodiment)
FIG. 6 is a partially enlarged view of a gas-liquid dispersion pump according to a fourth embodiment of the present invention. The gas-liquid dispersion pump 1d according to the fourth embodiment reduces the volume of the circulation space 42 provided on the back side of the impeller body 50, and supplies the fluid supplied into the circulation space 42 to the lubricating liquid inlet 37 (FIG. 1), the lubricating liquid supplied to the can gap 36 is used.

  The lubricating liquid supplied from the lubricating liquid injection port 37 passes through the can gap 36 and the front bearing 22 and reaches the circulation space 42 on the back side of the impeller as indicated by an arrow 92. In the circulation space 42, the gas supply channel 45 is opened to supply air to the lubricating liquid. Further, the lubricating liquid moves in the centrifugal direction by the rotation of the circulation blade 52 provided in the circulation space 42.

  In the circulation space, an annular bubble dispersion portion 53 provided on the outer portion of the circulation blade 22 of the facing surface 24a of the front bearing box 24 is provided. A gap between the bubble dispersion part 53 and the impeller body part 50 forms a dispersion channel 56. The surface of the bubble dispersion portion 53 facing the impeller body portion 50 is formed in a taper shape, and the flow passage enlargement portion 56a, the flow passage reduction portion 56b, and the minimum gap portion 56c are defined in the dispersion flow passage 56.

  Since the gap dimension between the bubble dispersion part 53 and the impeller body part 50 is different, the gas-liquid in the fluid that has passed through the dispersion flow path 56 is generated into fine bubbles.

(Fifth embodiment)
FIG. 7 is a partially enlarged view of a gas-liquid dispersion pump according to a fifth embodiment of the present invention. The gas-liquid dispersion pump 1e according to the fifth embodiment shares most of the configuration with the gas-liquid dispersion pump 1d according to the fourth embodiment, but the opening of the gas supply channel 45 is dispersed in the bubble dispersion part 53. It differs in that it is provided in the flow path 56.

  By adopting this configuration, the gas supply channel 45 is opened at a portion where the flow velocity of the fluid in the dispersion channel 56 increases, so that the self-priming of air passing through the gas supply channel 45 due to the differential pressure of the fluid. Is promoted.

(Sixth embodiment)
FIG. 8 is a partially enlarged view of the gas-liquid dispersion pump according to the sixth embodiment of the present invention. The gas-liquid dispersion pump 1f according to the sixth embodiment can generate fine bubbles with a simple configuration by configuring the bubble dispersion portion in a bowl shape. Specifically, the gas-liquid dispersion portion 53 disposed on the back side of the circulation blade 52 is bent in a bowl shape outside the circulation blade 52, and the side wall 50a of the impeller body 50 and the surface facing the bubble dispersion portion are formed. The minimum gap portion 56c is formed. Further, in order to form the flow path reduction part and the flow path expansion part before and after the gap minimum part 56c, a taper part is provided at a portion opposite to the bubble dispersion part 53, and the dispersed flow is generated in the gap with the side wall 50a of the impeller body part 50. A path 56 is defined.

  By adopting the above configuration, the flow path of the bubble dispersion portion can be configured with a simple configuration, and fine bubbles can be generated.

(Seventh embodiment)
FIG. 9 is a partially enlarged view of a gas-liquid dispersion pump according to a seventh embodiment of the present invention. In the gas-liquid dispersion pump 1g according to the seventh embodiment, the circulation blade 52 is directly provided on the rotary shaft 17. In addition, a branch pipe 61 separated from the gas supply channel 45 is provided to supply air into the dispersion channel 56 defined by the bubble dispersion unit 53.

  According to the gas-liquid dispersion pump 1g according to the present embodiment, the gap between the bubble dispersion portion 53 and the front bearing box 24 is increased, and the flow rate circulating through the circulation space 42 is increased. Furthermore, since air can be directly supplied to the bubble dispersion portion 53, the amount of fine bubbles dispersed can be increased.

(Eighth embodiment)
FIG. 10 is a partially enlarged view of the gas-liquid dispersion pump according to the eighth embodiment of the present invention. The gas-liquid dispersion pump 1h according to the eighth embodiment has a configuration in which the circulation blades 52 are provided also on both surfaces and side surfaces of the circulation blade support portion 58, and the centrifugal force applied to the circulation flow is increased.

  In addition, the dispersion flow path 56 provided in the bubble dispersion part 53 is configured to bend 90 degrees in the middle, so that the fluid that has flowed out from the flow path enlarged part 56 b of the dispersion flow path 56 is brought close to the liquid outlet 43. Configured to be located.

  The gas-liquid dispersion pump 1h according to the present embodiment is configured to bend the dispersion flow path 56 so that the fine bubble dispersion liquid flows out of the apparatus efficiently. Further, in order to compensate for the increase in flow resistance due to the bending of the dispersion flow path 56, the area of the circulation blade 52 is increased so that the gas-liquid mixed fluid easily passes through the dispersion flow path 56.

(Ninth embodiment)
FIG. 11 is a partially enlarged view of the gas-liquid dispersion pump according to the ninth embodiment of the present invention. In the gas-liquid dispersion pump 1i according to the ninth embodiment, the circulation blade 52 of the first embodiment shown in FIG. 1 is configured on the rear surface of the impeller body. In addition, one disk 55 constituting the bubble dispersion part 53 is disposed so as to be substantially flush with the disk of the impeller body part 50. With this configuration, the volume of the circulation space 42 can be reduced.

  On the other hand, a gap 62 is formed between the impeller main body portion and the disk 55 of the bubble dispersion portion 53. The gap 62 is preferably made smaller to make it difficult for the fluid to which the centrifugal force is applied by the circulation blade 52 to pass through. However, it is preferable to form the gap 62 to such an extent that it does not contact the disc 55 even when the impeller 48 rotates at high speed.

  The gas-liquid dispersion pump according to the ninth embodiment of FIG. 11 can reduce the capacity of the circulation space of the storage chamber.

(10th Embodiment)
FIG. 12 is a partially enlarged view of the gas-liquid dispersion pump according to the tenth embodiment of the present invention. In the gas-liquid dispersion pump 1j according to the tenth embodiment, the circulation blade 52 is configured on the rear surface of the impeller body, as in the ninth embodiment shown in FIG. As shown in FIG. 12, the surface 55b of one disk 55 constituting the bubble dispersion portion 53 is substantially flush with the surface of the impeller body portion 50 on the side where the centrifugal blades 51 are provided. It is arranged to become.

  With this configuration, the capacity of the circulation space of the storage chamber can be reduced, but a gap 62 is formed between the impeller body and the disk 55 of the bubble dispersion portion 53. In the present embodiment, in order to reduce the amount of fluid passing through the gap 62, the projecting edge portion 63 is provided on the opposing surfaces of the impeller body 50 and the disk 55. The protruding edge 63 functions as a leakage prevention mechanism that prevents the fluid from leaking into the liquid feeding space 41 through the gap 62.

The projecting edges 63 are arranged to face each other, and increase the flow resistance by increasing the surface where the impeller body 50 and the disk 55 face each other. By providing the projecting edge portion 63, it is possible to prevent fluid from leaking into the liquid feeding space 41 through the gap between the impeller main body portion 50 and the disc 55.
(Eleventh embodiment)
FIG. 13 is a partially enlarged view of the gas-liquid dispersion pump according to the eleventh embodiment of the present invention. Compared with the gas-liquid dispersion pump according to the ninth embodiment, the gas-liquid dispersion pump 1k according to the eleventh embodiment has a path 64 connecting the circulation space 42 and the side surface of the impeller body in the impeller body. Is different. The path 64 is formed in a hollow shape inside the disc-shaped impeller body, and is formed as a leakage prevention mechanism.

  The path 64 is configured to open from the side surface of the impeller main body 50 and extend to the vicinity of the rotation center of the impeller 48. When the circulation blade 52 rotates, the fluid is sent in the centrifugal direction, while the fluid moves in the vicinity of the rotation shaft 17. As the circulation blade 52 rotates, the fluid existing in the gap between the impeller main body 50 and the disk 55 is sucked into the path 64 and discharged from the vicinity of the center of the circulation blade 52.

  According to the gas-liquid dispersion pump 1k according to the eleventh embodiment, the fluid existing in the gap between the impeller body 50 and the disc 55 is sucked into the path 64, so that the fluid present in the gap is fed into the liquid feeding space 41. It is possible to prevent leakage.

(Twelfth embodiment)
FIG. 14 is a partially enlarged view of a gas-liquid dispersion pump according to a twelfth embodiment of the present invention. Compared with the gas-liquid dispersion pump according to the ninth embodiment, the gas-liquid dispersion pump 1L according to the twelfth embodiment is configured to have a concavo-convex structure 65 so that the opposed surfaces of the impeller body 50 and the disk 55 are engaged with each other. Is different. The uneven structure 65 is formed as a leakage prevention mechanism.

  The concavo-convex structure 65 includes thin portions in which the opposing surfaces of the disk 55 of the bubble dispersion portion 53 and the impeller body portion 50 are engaged in the thickness direction, and the thin portions are configured to face each other. Due to the concavo-convex structure 65, the gap between the impeller body 50 and the disk 55 is bent, so that the flow resistance of the fluid passing through the gap increases.

  According to the gas-liquid dispersion pump 1L according to the twelfth embodiment, the gap between the impeller main body 50 and the disc 55 can be bent to make it difficult for fluid to pass through the gap. Therefore, the fluid existing in the gap can be prevented from leaking into the liquid feeding space 41.

(13th Embodiment)
FIG. 15 is a partially enlarged view of a gas-liquid dispersion pump according to a thirteenth embodiment of the present invention. The gas-liquid dispersion pump 1m according to the thirteenth embodiment has a concavo-convex structure 65 so that the opposing surfaces of the impeller main body 50 and the disk 55 are engaged with each other as in the gas-liquid dispersion pump 1L according to the twelfth embodiment. It is. However, the gap formed by the concavo-convex structure is configured to be the second dispersion channel 56s in which the channel reduction part 56a, the channel expansion part 56b, and the minimum gap part 56c are formed.

  According to the gas-liquid dispersion pump 1m according to the thirteenth embodiment, the gap between the impeller main body 50 and the disc 55 can be bent to make it difficult for fluid to pass through the gap. In addition, the gap is formed with a channel reduction portion 56a, a channel enlargement portion 56b, and a gap minimum portion 56c so as to have a function as a dispersion channel, and fine bubbles can be generated. Therefore, the fluid existing in the gap can be prevented from leaking into the liquid feeding space 41, and the gas-liquid in the fluid that has passed through the gap can be made into fine bubbles.

(14th Embodiment)

  FIG. 16 is a partially enlarged view of a gas-liquid dispersion pump according to a fourteenth embodiment of the present invention. The gas-liquid dispersion pump 1n according to the fourteenth embodiment has a concavo-convex structure 65 so that the opposing surfaces of the impeller main body 50 and the disk 55 are engaged with each other, like the gas-liquid dispersion pump 1L according to the twelfth embodiment. It is. However, the gap formed by the uneven structure is configured to be a double orifice 66. A projecting edge 63 is provided on the opposing surface of the impeller body 50 and the disk 55.

  According to the gas-liquid dispersion pump 1n according to the fourteenth embodiment, the gap between the impeller main body 50 and the disc 55 can be bent to make it difficult for fluid to pass through the gap. Moreover, since the said clearance gap is comprised by the double orifice 66, the fluid which passes the said clearance gap is restrict | limited remarkably. In addition, since the amount of fluid that enters the gap can be limited by the projecting edge portion 63, it is effective that the fluid leaks into the liquid feeding space 41 through the gap due to the interaction with the double orifice 66. Can be prevented.

(Fifteenth embodiment)
FIG. 17 is a partially enlarged view of a gas-liquid dispersion pump according to a fifteenth embodiment of the present invention. The gas-liquid dispersion pump 1o according to the fifteenth embodiment has a configuration in which the partition part of one disk 55 constituting the bubble dispersion part 53 is shorter than the gas-liquid dispersion pump according to the first embodiment. is there. By shortening the partition part 55a of the disk 55, it is possible to promote the fluid flow in the gap 68 between the circulation blade support part 58 and the impeller 48. However, the fluid easily flows through the gap 62 between the disc 55 and the impeller main body 50, and the possibility that the fluid leaks into the liquid feeding space 41 without passing through the bubble dispersion portion 53 is increased.

  The gas-liquid dispersion pump 1o according to this embodiment includes a leakage prevention blade 67 on the surface of the circulation blade support portion 58 on the side where the circulation blade 52 is not provided. The leakage prevention blade 67 is provided only in the outer edge region of the circulation blade support 58 and moves the fluid in the gap 68 between the circulation blade support 58 and the impeller 48 in the centrifugal direction. For this reason, the fluid loaded with the centrifugal force moves the fluid in the direction opposite to the direction passing through the gap 62.

  According to the gas-liquid dispersion pump 1o according to the present embodiment, the leakage preventing blade 67 stirs the fluid so as not to enter the gap 68 between the impeller 48 and the circulation blade support portion 58, and the centrifugal force is generated by the rotation of the circulation blade 52. Can be prevented from passing through the gap 68, and more fluid can be sent to the bubble dispersion portion 53.

  The gas-liquid dispersion pump according to each embodiment of the present invention has a mechanism in which a part of the fluid pressurized by the centrifugal blade 51 in the storage chamber 40 causes a circulation flow behind the centrifugal blade 51. The air can be merged with the flow of the centrifugal blade 51 and flow out from the liquid outlet 43. Moreover, since the bubble dispersion part is provided in the middle of the circulating flow and the bubbles can be made finer, the fluid can be transported and the fine bubbles can be generated with one apparatus. By providing circulation blades in the storage chamber, the flow path to the bubble dispersion part can be efficiently passed, and even when used under pressurized conditions, differential pressure can be generated, Can be made.

  As described above, according to the gas-liquid dispersion pump according to each embodiment of the present invention, a circulation space capable of circulating the fluid behind the centrifugal blade of the pump having a fluid conveyance function is secured, and the circulation space The gas dispersed in the fluid can be refined and dispersed by the bubble dispersing portion provided in the. In order to circulate the fluid in the circulation space, the pressure difference generated by the centrifugal blade for discharge can be used. Further, since the micronized bubbles can be returned to the front side region and allowed to flow out from the liquid outlet, only the gas-liquid dispersion pump according to this embodiment can disperse the microbubbles and discharge the dispersed fluid. .

  The size of the bubbles dispersed by the bubble dispersion unit is determined by the flow rate of the liquid, the amount of gas, the configuration of the bubble dispersion unit, and the like, and can be miniaturized to the microbubble level.

  In addition, this invention is not limited to the said embodiment, It can implement in another various aspect.

  The fluid dispersion pump according to the present invention is suitable for various plants such as chemical plants because two fluids, particularly gas, can be finely dispersed to the level of fine bubbles, efficiently dispersed in a liquid, and further discharged. Can be used.

1a to 1o Gas-liquid dispersion pump 12 Canned motor 13 Liquid delivery dispersion portion 16 Rotor 17 Rotating shaft 18, 19 Sleeve 20, 21 Thrust collar 22, 23 Bearing 24 Front bearing box 25 Rear bearing box 26 Stator 27 Stator frame 28 Front flange 30 Gasket 31 Rear end surface 33 Rotor can 34 Side plate 35 Stator can 36 Can gap 37 Lubricating liquid inlet 38 Lubricating liquid outlet 39 Housing 40 Storage chamber 41 Liquid sending space 42 Circulating space 43 Liquid outlet 44 Liquid supply port 45 Gas supply flow path 46 Lubricating liquid conduit 48 Impeller 50 Impeller main body 51 Centrifugal blade 52 Circulating blade 53 Bubble dispersion part 54, 55 Disk 56 Dispersion flow path 56a Flow path reduction part 56b Flow path expansion part 56c Gap Minimum part 58 Circulating blade support part 62 Clearance 63 Projecting edge part 64 Path 65 Uneven structure 66 Double orifice 67 Leakage Prevention wings 68 gap

Claims (14)

An impeller that is rotatably supported and sucks and discharges a first fluid having a centrifugal blade on one surface of a disk-shaped body portion;
One axial end is connected to the impeller, and the motor rotates the impeller;
A circulation blade that is provided on the other surface side where the centrifugal blade is not provided with respect to the impeller body, and rotates coaxially with the rotation shaft of the impeller;
A housing in which the impeller and the circulation blade are accommodated, and a housing chamber is defined in which a first fluid supply port, a dispersion fluid discharge port, and a second fluid supply port are defined;
A flow path that is disposed adjacent to the impeller and the circulation blade in a circulation space on the back side with respect to the centrifugal blade of the impeller in the storage chamber, and that opens from a centrifugally extending position of the circulation blade and expands away from the circulation blade. An annular dispersion section provided with
A fluid dispersion pump comprising:   The flow path is configured such that the cross-sectional area gradually decreases as the distance from the circulation blade decreases, and the flow path expansion part configured such that the cross-sectional area of the flow path gradually increases. 2. The fluid dispersion pump according to claim 1, further comprising an annular slit having an annular minimum gap portion at a connection portion between the flow path reducing portion and the flow path expanding portion.   The fluid dispersion pump according to claim 1, wherein the circulation blade is configured to be larger than the centrifugal blade.   4. The fluid dispersion pump according to claim 1, wherein the circulation blade is provided on the other surface of the impeller main body. 5.   5. The fluid dispersion pump according to claim 1, wherein the circulation blade is provided in a circulation blade support portion provided to face the impeller main body portion. The dispersion unit is
Consists of a plurality of plate-like members provided facing each other,
The fluid dispersion pump according to any one of claims 1 to 5, wherein a gap between the plate-like members is defined as the flow path.   The fluid dispersion pump according to claim 6, wherein at least one of the plate-like members constituting the dispersion part constitutes the impeller body part. The plate-like member that constitutes the dispersion part is configured in an annular shape and is disposed adjacent to the impeller body part on the outer diameter side of the impeller body part,
Furthermore, the plate-like member and the impeller main body arranged adjacent to each other are provided with a leakage prevention mechanism for preventing fluid from leaking from between the plate-like member and the impeller main body. The fluid dispersion pump according to claim 6.   The fluid dispersion according to claim 8, wherein the leakage prevention mechanism is a projecting edge portion provided to face the opposing surfaces of the plate member and the impeller body portion arranged adjacent to each other. pump.   The leakage prevention mechanism is a path provided in the impeller main body that opens from the opposing surface of the plate member and the impeller main body arranged adjacent to each other and extends to the impeller central portion. The fluid dispersion pump according to claim 8 or 9.   The fluid dispersion pump according to claim 8, wherein the leakage prevention mechanism is configured to have a concavo-convex shape that meshes the opposing surfaces of the plate member and the impeller main body arranged adjacent to each other.   The fluid dispersion pump according to claim 11, wherein the leakage prevention mechanism is a double orifice provided on a facing surface of the plate-like member and the impeller main body that are arranged adjacent to each other.   The fluid dispersion pump according to claim 8, wherein the leakage prevention mechanism is a leakage prevention blade provided in the circulation blade support portion. The fluid dispersion pump according to any one of claims 1 to 13, wherein the motor is a canned motor including a rotor that rotates coaxially with a rotation shaft of the impeller.

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