JPH08135592A - Turbine magnet drive pump - Google Patents

Abstract

PURPOSE: To reduce rotation resistance, exerted on a magnet coupling, transmitting the rotational drive force of a turbine impeller to a pump impeller, by fluid as much as possible. CONSTITUTION: A magnet 17 for taking out a turbine power arranged integrally with a turbine impeller 7 is arranged in the cylindrical part 13a of a partition member 13 on the turbine side. A magnet 38 for transmitting a power on the turbine side is situated facing the magnet 17 in such a manner to surround the cylindrical part 13a therewith. Meanwhile, a magnet 27 for driving a pump arranged integrally with a pump impeller 8 is arranged in the cylindrical part 23a of the partition member 23 on the pump side. Further, a magnet 41 on the pump side for transmitting a power is arranged facing the magnet 27 in such a manner to surround the cylindrical part 23a therewith. The two magnets 38 and 41 for transmitting a power are intercoupled through a rotary shaft 33 and two hold members 36 and 39. The magnets 17 and 27 are positioned inside the magnets 38 and 41 for transmitting a power through a partition wall member 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turbine magnet drive pump which is driven by a working fluid to carry a carrier fluid, and particularly to a turbine magnet which prevents the working fluid and carrier fluid from being mixed with each other and which does not require a shaft seal. It relates to a drive pump.

[0002]

2. Description of the Related Art A turbine magnet drive pump which is driven by a working fluid to convey a carrier fluid, prevents mixing of the working fluid and the carrier fluid and does not require a shaft seal. 6-1
A fluid drive pump disclosed in Japanese Patent No. 85489 has been proposed.

FIG. 14 is a sectional view of the fluid-driven pump disclosed in this publication. As shown in FIG. 14, the fluid-driven pump 50 includes a drive impeller 51 of a turbine that is rotationally driven by a working fluid, and a drive impeller 51 that is integrally attached to the drive impeller 51 via a holder 52. A cylindrical drive side magnet 53 rotating together, and a pump side magnet 5 coaxially arranged in the drive side magnet 53.
4, a pump impeller 55 that is integrally attached to the pump-side magnet 54 and rotates together with the pump-side magnet 54 to convey a carrier fluid, and is disposed between the drive-side magnet 53 and the pump-side magnet 54. A partition wall 56 for fluid-tightly blocking the drive side and the pump side is provided. In that case, the magnetic force of the drive-side magnet 53 and the magnetic force of the pump-side magnet 54 form a magnetic coupling that transmits power in a non-contact manner.

In the fluid-driven pump 50 constructed as described above, the working fluid introduced from the working fluid inlet 57 rotationally drives the drive impeller 51 and flows out from the working fluid outlet 58. The drive side magnet 53 is rotated by the rotational drive of the drive impeller 51, the pump side magnet 54 is rotated together with the rotation of the drive side magnet 53 by the magnetic coupling, and the pump side magnet 54 is further rotated by the rotation of the pump side magnet 54. The impeller 55 rotates. By the rotation of the pump impeller 55, the carrier fluid is sucked from the carrier fluid inlet 59 and the carrier fluid outlet 6
It is discharged from 0.

According to this fluid drive pump 50, the partition wall 5
Since 6 shuts the drive impeller 51 side and the pump impeller 55 side in a fluid-tight manner, the working fluid on the drive impeller 51 side and the carrier fluid on the pump impeller 55 side do not mix. Not only is it unnecessary to seal the rotary shafts 61, 62 on the drive impeller 51 side and the pump impeller 55 side, the rotational resistance of the rotary shafts 61, 62 is correspondingly reduced, resulting in energy loss. Is small.

[0006]

By the way, in such a fluid drive pump 50, the cylindrical drive side magnet 5 is used.
3 is arranged so as to surround the outer peripheral surface of the pump-side magnet 54 because it constitutes a magnetic coupling. Therefore, the drive magnet 53 and the holder 52 are
The respective diameters of the tubular portions of the above have to be set relatively large. Moreover, since the partition wall 56 is interposed between the drive-side magnet 53 and the pump-side magnet 54, the diameters of the drive-side magnet 53 and the tubular portion of the holder 52 must be set to be even larger.

On the other hand, the chamber 63 in which the drive-side magnet 53 and the tubular portion of the holder 52 are housed is filled with working fluid. Therefore, the driving-side magnet 53 and the tubular portion of the holder 52 rotate in the working fluid filling the chamber 63.

However, when the drive-side magnet 53 and the tubular portion of the holder 52 rotate in the working fluid in the chamber 63 as described above, the drive-side magnet 53 has a large diameter as described above, and thus the drive-side magnet 53 is driven. When the side magnet 53 and the tubular portion of the holder 52 are rotated, a large rotational resistance is received from the working fluid in the chamber 63. Therefore, the rotation speed of the pump impeller 55 cannot be increased, and the pump discharge amount is limited to some extent.

Therefore, conversely, it is conceivable to form the pump-side magnet 54 into a cylindrical shape and dispose the drive-side magnet 53 in the inner hole of the pump-side magnet 54. However, in the case of such a configuration, The diameter of the pump-side magnet 54 has to be set large, and as a result, the pump-side magnet 54 now receives a large rotational resistance from the conveyed fluid, causing the same problem.

The present invention has been made in view of the above problems, and an object thereof is to minimize the rotational resistance received from a fluid by a magnet coupling for transmitting the rotational driving force of a turbine impeller to a pump impeller. It is an object of the present invention to provide a turbine magnet drive pump that can be used.

[0011]

In order to solve the above-mentioned problems, the invention of claim 1 provides a turbine impeller driven by a working fluid, a pump impeller for conveying a carrier fluid,
A power transmission rotating member that transmits the power generated by the turbine impeller to the pump impeller; a turbine-side partition member that fluid-tightly separates the turbine impeller and the power transmission rotating member; and the pump impeller. A pump-side partition wall member that fluid-tightly separates the power transmission rotary member, and a turbine attached to the turbine impeller inside a tubular turbine power transmission magnet attached to one end side of the power transmission rotary member. A turbine side magnet coupling magnetically coupled by disposing a power take-out magnet facing the turbine power transmitting magnet via the turbine side partition member, and attached to the other end side of the power transmitting rotating member. The pump drive magnet attached to the pump impeller is installed inside the cylindrical pump power transmission magnet. The net through the pump-side partition wall member is characterized in that it comprises a magnetic coupled pump-side magnet coupling by arranging to face the pump power transmission magnet.

The invention of claim 2 is characterized in that the fluid in contact with the power transmission rotary member is a gas, or the circumference of the power transmission rotary member is a vacuum.

According to a third aspect of the present invention, in the pump impeller, the meridian surface shape of the shroud connected to the boss is a concave arc-shaped rotation surface, and the boss shroud to which the blade inlet edge is attached is substantially parallel to the rotation axis. It is formed in a cylindrical shape, and the blade inlet edge is smoothly continuous from the boss shroud surface to largely project to the upstream side, and the blade inlet edge on the pump casing side is extended substantially at right angles to the rotation axis. , The blade inlet edge attached to the cylindrical boss shroud and the inlet edge of the blade on the pump casing side are connected by an arc-shaped smooth curve that is convex toward the upstream side to form the blade inlet edge, and the inlet angle of this blade Is set to approximately 0 ° at the inlet edge on the boss shroud side, and gradually increases from the inlet edge on the boss shroud side toward the inlet edge on the pump casing side. The blade has a blade inlet with a smoothly changed blade inlet angle between the wood side and the pump casing side, and is provided with a blade formed by connecting a smooth curved line from the blade-shaped blade inlet to the blade outlet end. In the turbine impeller, the meridian surface shape of the shroud connected to the boss is a concave arc-shaped rotation surface, and the boss shroud to which the blade outlet edge is attached is formed in a cylindrical shape substantially parallel to the rotation axis, and the blade outlet edge is formed. A blade outlet that is smoothly continuous from this boss shroud surface and largely protrudes toward the downstream side, and has a blade outlet edge on the turbine casing side that extends substantially at right angles to the rotation axis and that is attached to the cylindrical boss shroud. The blade and the turbine casing side blade outlet edge are connected to each other by a smooth arc-shaped curve that is convex toward the downstream side to form a blade outlet edge. The shroud side outlet edge is set to approximately 0 ° and gradually increases from the boss shroud side outlet edge toward the turbine casing side outlet edge, and the blade outlet angle between the boss shroud side and the turbine casing side is set. Has a blade outlet having a smoothly changing shape, and is provided with a blade formed by connecting from the blade inlet to the blade-shaped blade outlet end with a smooth curve.

Further, according to the invention of claim 4, the inlet angle of the blade of the pump impeller is set to an angle calculated by the conventional design at the inlet edge of the pump casing side and the blade of the turbine impeller is It is characterized in that the outlet angle is set at the outlet edge on the turbine casing side to an angle calculated by a conventional design.

[0015]

According to the turbine magnet drive pump of the present invention thus constructed, the turbine power take-out magnet and the pump drive magnet are arranged inside the turbine power transmission magnet and the pump power transmission magnet, respectively. Like Therefore, the diameters of the turbine power transmission magnet and the pump power transmission magnet can be further reduced, and the relatively large rotational resistance due to the working fluid or the carrier fluid received by the turbine impeller and the pump impeller is further reduced. Become. As a result, the energy for driving the turbine impeller is further saved, and the turbine efficiency is improved. Further, the power generated by the turbine impeller can be efficiently transmitted with almost no loss. Further, the pump impeller rotates more efficiently, and the pump efficiency improves. For these reasons, the system efficiency of the turbine magnet drive pump as a whole is further improved.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an embodiment of a turbine magnet drive pump according to the present invention, in which a turbine impeller and a pump impeller are both drawn as a closed type impeller. Note that the present invention does not limit the turbine impeller or the pump impeller to the closed type impeller.

As shown in FIG. 1, the turbine magnet drive pump 1 according to the present embodiment has first to fifth casings 2 and 3 which are integrally and fluid-tightly coupled to each other to form a casing of one size. , 4, 5, 6 are provided, a turbine impeller 7 is rotatably arranged in the second casing 3, and a pump impeller 8 is rotatably arranged in the fourth casing 5. ing. In FIG. 1, the casings are the first to fifth casings 2,3,4,5,6.
Although the casing is divided into five parts, the casing can be formed by dividing it into any other suitable number.

The second casing 3 has a turbine impeller 7
A turbine inlet passage 9 into which a working fluid for rotationally driving is driven is provided in a scroll shape so as to communicate with the blade inlet 7a of the turbine impeller 7. Further, the first casing 2 is provided with a turbine outlet passage 10 through which the working fluid after operating the turbine impeller 7 flows out so as to communicate with the blade outlet 7b of the turbine impeller 7.

On the other hand, the sixth casing 6 is provided with a pump inlet passage 11 into which the carrier fluid conveyed by the pump impeller 8 flows, so as to communicate with the blade inlet 8b of the pump impeller 8. Further, in the fifth casing 5, the pump outlet passage 12 through which the carrier fluid carried from the pump impeller 8 flows is scroll-shaped and the pump impeller 8 is provided.
It is provided so as to communicate with the blade outlet 8a.

2 is a view of the turbine impeller 7 used in this embodiment as seen from the direction of arrow X in FIG. 1 with the front front shroud taken, and FIG. 3 is the AOE in FIG.
2 is a sectional view taken along the line, and FIG. 4, FIG. 5, and FIG.
6 is a cross-sectional view taken along line BO, line CO, and line DO in FIG.

As shown in FIGS. 2 and 3, three blades 7e, 7 are provided on the outer peripheral surface of the central boss portion 7c of the turbine impeller 7.
e, 7e are formed. Further, a shroud 7f is continuously formed on the boss portion 7c, and a meridian surface shape of the shroud 7f is formed as a concave arcuate surface of revolution. Then, the blade outlet edge 7e of the shroud 7f
The boss shroud 7f ₁ in which ₁ is fixed is formed substantially parallel to the rotation axis O.

A portion 7e _{2 of the} blade outlet edge 7e _{1 on} the boss shroud 7f ₁ side is formed so as to be smoothly continuous with the boss shroud 7f ₁ and largely extend to the downstream side.
Further, the blade outlet tip side portion of the blade outlet edge 7e ₁ , that is, the casing side portion 7e ₃ is formed so as to be substantially perpendicular to the rotation axis O. Further, the blade outlet edge 7
e ₁ is the casing side portion 7e ₃ and the boss shroud 7f ₁
It is formed by a continuous arc-shaped smooth curve so as to form a convex shape downstream from the side portion 7e ₂ . Outlet angle of the blade outlet edge 7e _1, together are approximately 0 ° setting boss shroud 7f ₁ portion 7e ₂ of the blade outlet edge 7e _1, the boss shroud 7f ₁ portion 7e ₂ from the blade outlet edge 7e ₁ It is set so as to gradually increase toward the casing side portion 7e ₃ . That is, the blade outlet angle of the conventional turbine is set so as to change in a curve as shown by a broken line in FIG. 7, which sharply increases on the boss diameter side so that the rotation center axis O becomes 90 °. In the present embodiment, the blade outlet angle at the blade outlet 7b is set to almost 0 ° for the boss diameter r _ob as shown by the solid line in FIG. 7, and the boss diameter r _{ob changes} to the blade outlet diameter r _oo . It is set so that it gradually increases toward the end, and thus changes with a curve having a gradient opposite to that of the conventional curve indicated by the broken line. Note In the illustrated example, the outlet angle of the blade outlet edge 7e ₁ is set to an angle which is generally calculated in substantially conventional design casing portion 7e ₃ of the blade outlet edge 7e _1, limited to Without it, it may be set larger or smaller than the angle generally calculated in the conventional design.
Further, the outlet angle between the boss shroud 7f ₁ side portion 7e ₂ and the casing side portion 7e ₃ is set so as to change smoothly. The turbine blade 7e is formed by connecting the blade inlet 7a to the blade outlet 7b with a smooth curve.

FIG. 8 is a view of the pump impeller 8 used in this embodiment as seen from the direction of the arrow Y, and FIG. 9 is a sectional view taken along the line AOE in FIG. As shown in FIGS. 8 and 9, the pump impeller 8 is formed in exactly the same shape as the turbine impeller 7 described above. In that case, since the fluid flow in the pump impeller 8 is opposite to that in the turbine impeller 7, the inlet side of the turbine impeller 7 is the outlet side of the pump impeller 8 and the outlet side of the turbine impeller 7 is the pump impeller. It is on the entrance side of the car 8. Therefore, the reference numerals of the constituent elements of the pump impeller 8 are the turbine impeller 7
In the description, "7" in the reference numeral of the corresponding component is replaced with "8". Therefore, 8a vane outlet, 8b wings inlet, 8c boss portion, 8d through hole, 8e pump vanes, 8e ₁ the blade inlet edges, 8e ₂ boss shroud 8f ₁ portion of the blade inlet edge 8e _1, 8e ₃ is a casing side portion of the blade inlet edge 8e ₁ , 8e ₄ is a blade outlet edge, 8f is a shroud, and 8f ₁ is a boss shroud.

A boss shroud 8f ₁ to which the blade inlet edge 8e ₁ is fixed is formed substantially parallel to the rotation axis O, and the boss shroud 8f ₁ side portion 8 of the blade inlet edge 8e ₁ is formed.
The e ₂ is formed so as to smoothly continue to the boss shroud 8f ₁ and to largely project to the upstream side. Also,
The casing side portion 8e ₃ of the blade inlet edge 8e ₁ is formed so as to be substantially perpendicular to the rotation axis O. Furthermore,
The blade inlet edge 8e ₁ is formed by a continuous arc-shaped curve that is convex between the casing side portion 8e ₃ and the boss shroud 8f ₁ side portion 8e ₂ so as to be convex toward the upstream side. Inlet angle of the blade inlet edge 8e _1, together are approximately 0 ° set at the blade inlet edge 8e ₁ of the boss shroud 8f ₁ portion 8e _2, generally conventional in casing portion 8e ₃ of the blade inlet edge 8e ₁ It is set to an angle that is generally calculated in the design of. Furthermore, the inlet angle between the boss shroud 8f ₁ side portion 8e ₂ and the casing side portion 8e ₃ is
It is set to change smoothly.

The other construction of the pump impeller 8 is the same as that of the turbine impeller 7, and therefore its explanation is omitted and the sectional shape of the pump impeller 8 taken along the lines BO, CO and DO in FIG. The cross-sectional shape of the turbine impeller 7 shown in FIGS. 4, 5 and 6 is the same.

By the way, the blade inlet angle of the conventional pump is
The rotation center axis O is set to be 90 ° so as to be sharply increased on the boss diameter side, that is, to be changed in a curve shown by a broken line in FIG. On the other hand, in the present embodiment, the blade inlet angle at the blade inlet 8b is as shown in FIG.
As shown by a solid line at 0, the blade inlet diameter r _io is set to be the same as the blade inlet angle set by the conventional design, and the boss diameter r _ib is set to almost 0 °, and these blade inlet diameters r _{io are set.} The blade inlet angle between the boss diameter and the boss diameter r _ib is set to change with a curve having a gradient opposite to that of the conventional curve indicated by the broken line.

As shown in FIG. 1, a turbine side partition wall member 13 is disposed at the end of the third casing 4 on the turbine impeller 7 side. A cylindrical portion 13a arranged coaxially, and a flange portion 13 formed at one end of the cylindrical portion 13a.
b and a shaft support portion 13c formed at the other end of the cylindrical portion 13a, and the flange portion 13b is pinched and fixed between the second and third casings 3 and 4. A turbine side support shaft 14 is provided in the shaft support portion 13c of the turbine side partition wall member 13 so as to penetrate through the shaft support portion 13c. The support shaft 14 has a stepped first portion protruding into the cylindrical portion 13a. The support shaft portion 14a, the flange portion 14b, and the second support shaft portion 14c projecting to the side opposite to the first support shaft portion 14a are formed, and the flange portion 14b is fixed to the shaft support portion 13c by a fixture 15 such as a screw. .

As shown in the enlarged view of FIG. 11, the cylindrical portion 13
In the inside of a, a cylindrical turbine power take-out magnet holding portion 16 is integrally formed with the turbine impeller 7 by a single member.
And a turbine power take-out magnet 17 is fixed to the turbine power take-out magnet holding portion 16. The turbine impeller 7 and the turbine power take-out magnet holding portion 16 are provided with a stepped hole 18 penetrating them in the axial direction. The large diameter hole of the stepped hole 18 corresponds to the first support shaft portion 14a. By fitting it to the small diameter part of the
6 is rotatably supported by the slide bearing on the small diameter portion of the first support shaft portion 14a. Further, the axial thrust of the turbine impeller 7 is caused by the wear ring 4 made of a bearing material.
It is supposed to be supported by 4. As will be described later, since the turbine can be formed in a small size and at a high speed, the wear ring 44 can support the shaft thrust.

Between the inner peripheral surface of the cylindrical portion 13a and the outer peripheral surface of the turbine power take-out magnet holding portion 16, and between the end of the turbine power take-out magnet holding portion 16 and the shaft support portion 1.
3c, a passage 19 is formed, and a part of the working fluid that operates the turbine impeller 7 through the passage 19 and the stepped hole 18 causes a portion of the turbine power takeout magnet holding portion 16 and the first support shaft. The sliding bearing portion between the portion 14a and the small diameter portion can be infiltrated to lubricate the sliding bearing portion.

Further, the space between the flange portion 13b of the turbine side partition wall member 13 and the second casing 3 is fluid-tightly sealed by the O-ring 20, and the shaft support portion 13c of the turbine side partition wall member 3 and the support shaft 14 are connected. The O-ring 21 is fluid-tightly sealed between the first and second casings 2 and 3, and the O-ring 22 is fluid-tightly sealed between the first and second casings 2 and 3 in which the turbine impeller 7 is housed and the casing. The outside is completely fluid-tightly sealed. The magnet 17 is provided integrally with the turbine impeller 7 and is fluid-tight.

On the other hand, as shown in FIG. 1, the pump side partition member 23 is provided at the end of the third casing 4 on the pump impeller 8 side.
The pump-side partition wall member 23 includes a cylindrical portion 23a arranged coaxially with the pump impeller 8, a flange portion 23b formed at one end of the cylindrical portion 23a,
And a shaft support portion 23 formed at the other end of the cylindrical portion 23a
The flange portion 23b is clamped and fixed between the third and fourth casings 4 and 5. A pump side support shaft 24 is provided in the shaft support portion 23c of the pump side partition member 23 so as to penetrate the shaft support portion 23c. The support shaft 24 has a stepped first portion projecting into the cylindrical portion 23a. Support shaft 24a, flange 24b, and first support shaft 24
The second support shaft portion 24c protruding to the side opposite to a, and the flange portion 24b is fixed to the shaft support portion 2 by a fixture 25 such as a screw.
It is fixed to 3c. The support shaft 24 is arranged coaxially with the turbine-side support shaft 14.

As shown in the enlarged view of FIG. 12, the cylindrical portion 23
A cylindrical pump drive magnet holding portion 26, which is integrally formed with the pump impeller 8 by a single member, is disposed in a, and the pump drive magnet holding portion 26 is used for pump drive. The magnet 27 is fixedly installed. The pump impeller 8 and the pump driving magnet holding portion 26 are provided with a stepped hole 28 penetrating them in the axial direction. The large diameter hole of the stepped hole 28 is formed in the first support shaft portion 24a. By fitting in the small diameter portion, the pump driving magnet holding portion 26 is rotatably supported by the slide bearing on the small diameter portion of the first support shaft portion 24a. The axial thrust of the pump impeller 8 is supported by a wear ring 45 made of a bearing material. As will be described later, the pump can also be formed in a small size and at high speed, so that the wear ring 45 can support the shaft thrust.

A passage 29 is provided between the inner peripheral surface of the cylindrical portion 23a and the outer peripheral surface of the pump driving magnet holding portion 26, and between the end portion of the pump driving magnet holding portion 26 and the shaft support portion 23c. A part of the carrier fluid carried by the pump impeller 8 through the passage 29 and the stepped hole 28 is slipped between the pump driving magnet holding part 26 and the small diameter part of the first support shaft part 24a. The sliding bearing portion can be lubricated by penetrating into the bearing portion.

Further, the space between the flange portion 23b of the pump side partition member 23 and the fourth casing 5 is fluid-tightly sealed by the O-ring 30, and the shaft support portion 23c of the pump side partition member 3 and the support shaft 24 are connected. The space is fluid-tightly sealed by the O-ring 31, and the fourth and fifth casings 5, 6 are
The space between them is fluid-tightly sealed by the O-ring 32,
The inside of the casing containing the pump impeller 8 and the outside of the casing are completely fluid-tightly sealed. The magnet 17 is provided integrally with the turbine impeller 7 and is fluid-tight.

Second support shaft portion 1 of the support shaft 14 on the turbine side
4c and a second support shaft portion 24c of the pump-side support shaft 24, a cylindrical rotation shaft 33 is erected, and one end of this rotation shaft 33 is attached to the second support shaft portion 14c via a bearing 34. Is rotatably supported, and the other end of the rotary shaft 33 is rotatably supported by the second support shaft portion 24c via a bearing 35.

A tubular turbine-side power transmission magnet holding member 36 is provided so as to surround the tubular portion 13a of the turbine-side partition wall member 13 and the rotary shaft 33, and one end thereof is loosely fitted in the tubular portion 13a. At the same time, the other end is fitted to the rotary shaft 33 and fixed by a fastener 37 such as a screw. A turbine-side power transmission magnet 38 is fixed to one end of the turbine-side power transmission magnet holding member 36 so as to face the turbine-power extraction magnet 17 in the radial direction. That is, the turbine power extraction magnet 17 is arranged inside the turbine-side power transmission magnet 38, and the two magnets 17, 38 are magnetically coupled to each other to transfer the power of the turbine impeller 7 to the rotating shaft 33 in a non-contact manner. It constitutes the turbine-side magnet coupling for transmission.

The tubular pump-side power transmission magnet holding member 39 is the tubular portion 23a of the pump-side partition wall member 23.
The rotary shaft 33 is provided so as to surround the rotary shaft 33. One end side of the rotary shaft 33 is loosely fitted to the cylindrical portion 23a, and the other end side is fitted to the rotary shaft 33 and fixed by a fastener 40 such as a screw. A pump-side power transmission magnet 41 is fixed to one end of the pump-side power transmission magnet holding member 39 so as to face the pump-driving magnet 27 in the radial direction. That is, the pump driving magnet 27 is arranged inside the pump-side power transmission magnet 41, and both of these magnets 2 are arranged.
Reference numerals 7 and 41 constitute a pump-side magnet coupling that is magnetically coupled to each other and transmits the power of the rotating shaft 33 to the pump impeller 8 in a non-contact manner.

Then, the turbine impeller 7 is constituted by the rotating shaft 33, the turbine-side power transmission magnet holding member 36 and the tubular pump-side power transmission magnet holding member 39.
The power transmission rotary member of the present invention is configured to transmit the power generated by the pump impeller 8 to the pump impeller 8. In addition,
The rotating shaft 33, the turbine-side power transmission magnet holding member 36, and the tubular pump-side power transmission magnet holding member 39 may be integrally formed as a single member.

As described above, in this embodiment, the turbine power take-out magnet holding portion 16 and the turbine power take-out magnet 17 immersed in the working fluid are arranged inside the tubular portion 13a of the turbine side partition member 13. Therefore, the turbine-side power transmission magnet holding member 36 and the turbine-side power transmission magnet 38 that are in contact with the atmosphere are arranged outside the tubular portion 13a of the turbine-side partition member 13. Therefore, it is formed in a large diameter. Similarly, the pump driving magnet holding portion 26 and the pump driving magnet 27 immersed in the carrier fluid have a small diameter, and the pump side power transmitting magnet holding member 39 and the pump side power transmitting magnet 41 which are in contact with the atmosphere have a large diameter. To be formed respectively.

The third casing 4 is provided with a predetermined number of communication holes 42, 42, ... Which communicate the internal space for accommodating these magnet couplings with the external atmosphere. The communication holes 42, 42, ... Keep the power transmission mechanism such as a magnet coupling in contact with the atmosphere at all times, and the power transmission mechanism such as the magnet coupling is cooled by the atmosphere. In that case, the fan blades 43 are provided on at least one of the outer peripheral surface of the turbine-side power transmitting magnet holding member 36 and the pump-side power transmitting magnet holding member 39, as shown by the two-dot chain line in FIG. It is also possible to improve the cooling effect by causing the atmosphere to flow as indicated by an arrow γ shown in FIGS. 1, 11, and 12.

In the turbine magnet drive pump 1 of the present embodiment constructed as described above, when the working fluid is introduced into the turbine impeller 7 from the turbine inlet passage 9, the working fluid flows from the blade inlet 7a to the turbine blade. While colliding with 7e, it is guided by the turbine blade 7e and flows,
It flows out from the outlet 10 of the first casing 2. At this time,
Since the turbine blade 7e receives a force from the working fluid,
The turbine impeller 7 rotates in the clockwise direction α in FIG.

By rotating the turbine impeller 7 in the α direction,
The turbine power take-out magnet holding portion 16 and the turbine power take-out magnet 17 rotate in the same direction, and the turbine side power transmitting magnet 38 and the turbine side power transmitting magnet holding member 36 rotate in the same direction, thereby rotating. The shaft 33 rotates in the same direction. The rotation of the rotary shaft 33 causes the pump-side power transmission magnet holding member 39 and the pump-side power transmission magnet 41 to rotate in the same direction, and the pump drive magnet 27.
Also, the pump driving magnet holding portion 26 rotates in the same direction, which causes the pump impeller 8 to rotate in the counterclockwise direction β in FIG. Due to the rotation of the pump impeller 8 in the β direction, the carrier fluid is sucked from the pump inlet passage 11, guided by the pump blade 8e, flows, and is discharged from the pump outlet passage 12 of the fourth casing 5.

When the blade outlet angle of the turbine impeller 7 is set as in this embodiment, when the fluid flows through the turbine impeller 7, the flow of the working fluid near the boss shroud root portion of the blade 7e does not resist. It will be smoothly guided to the outside of the blade. As a result, the flow of the working fluid becomes uniform at the boss shroud 7f ₁ side portion of the blade outlet 7b, so that the working fluid effectively acts over the entire blade (from the boss shroud side to the casing side) of the blade outlet 7b portion. Become. Further, in the present embodiment, the boss shroud side portion 7e ₂ of the blade outlet edge 7e ₁ is largely projected toward the downstream side, and the casing side portion 7e ₃ is formed substantially at right angles to the rotation axis O. Both of these parts 7e ₂ ,
An arc-shaped smooth curve is formed so that a portion between 7e ₃ is convex toward the downstream side. Thus, the blade outlet edge 7e
_The formation of ₁ ensures a wide flow passage area at the blade outlet 7b. This allows the working fluid to flow efficiently at the blade outlet 7b. Therefore, cavitation is less likely to occur, the cavitation characteristics in the turbine can be improved, the energy loss of the working fluid can be reduced, and the turbine efficiency can be improved. Then, by improving the cavitation characteristics and the turbine efficiency in this way, the turbine impeller 7 can be rotated at a higher speed.

On the other hand, when the blade inlet angle of the pump impeller 8 is set as in this embodiment, the fluid is pump impeller 8
When the blade 8e flows, the flow in the vicinity of the root portion of the boss shroud of the blade 8e is cut off and efficiently guided into the blade. As a result, the flow is uniform in the portion of the blade inlet 8b on the boss shroud 8f ₁ side, and the blades act effectively over the entire blade of the blade inlet 8b (from the boss shroud side to the casing side). Further, in the present embodiment, the boss shroud side portion 8e ₂ of the blade inlet edge 8e ₁ is largely projected toward the upstream side, and the casing side portion 8e ₃ is formed substantially at right angles to the rotation axis O. Between these two portions 8e ₂ and 8e ₃ , a curved arc-shaped curve is formed so as to be convex toward the upstream side. By forming the blade inlet edge 8e _{1 in} this manner, a wide flow passage area is secured at the blade inlet 8b. This allows the carrier fluid to effectively flow at the blade inlet 8b. Therefore, the cavitation characteristics and pump characteristics of the pump can be improved. Then, by improving the cavitation characteristics and the pump characteristics in this way, it becomes possible to rotate the pump impeller 8 at a higher speed.

Thus, since the turbine characteristics of the turbine impeller 7, the pump characteristics of the pump impeller 8 and the cavitation characteristics of these impellers 7 and 8 are improved,
The pump characteristics and cavitation characteristics of the turbine magnet drive pump of this embodiment are also greatly improved.

FIG. 13 shows the test results of the head and system efficiency of the turbine magnet drive pump of this embodiment when the working fluid and the carrier fluid were water.

In FIG. 13, system efficiency η is pump output (ρ × Q _p × g × H _p ; H _p is total head, Q _p is discharge amount)
Turbine input (ρ × Q _t × g × H _t ; H _t is the effective head,
_Qt is shown as a value divided by (flow rate). The test was conducted with the target rotational speed of the turbine magnet drive pump of about 20,000 to 40,000 rpm. The numbers shown on the pump head curve represent the number of revolutions. The suction condition was + 2m indentation, and the turbine was + 1.5m in suction height.

As is apparent from FIG. 13, the turbine magnet drive pump of this embodiment can obtain a very large pump head H (m) by rotating at a high speed. Moreover, it can be seen that the maximum point of the system efficiency η (%) is about 51% and high efficiency is maintained even at such high speed rotation.

Therefore, the turbine magnet drive pump of the present embodiment can efficiently convey a relatively large flow rate, and thus the flow rate can be secured even if the pump is made small, so that the turbine magnet drive pump can be miniaturized at high speed. The cavitation characteristics are improved.

Further, in the present embodiment, the turbine power take-out magnet holding portion 16 and the turbine power take-out magnet 17 or the pump driving magnet holding portion 26, which are immersed in the working fluid or the carrier fluid having a relatively large rotational resistance, The pump driving magnet 27 is formed to have a small diameter, and the turbine side power transmission magnet holding member 36 and the turbine side power transmission magnet 38 or the pump side power transmission magnet holding member 39 and the pump side, which are in contact with the atmosphere having a small rotational resistance, are provided. Since the power transmission magnet 41 is formed to have a large diameter, the rotational resistance received from the fluid by the magnet coupling for transmitting the rotational driving force of the turbine impeller 7 to the pump impeller 8 is further reduced. As a result, the turbine impeller 7 can be driven with a smaller amount of energy, the turbine impeller 7 can generate power more efficiently, and the magnet coupling does not lose the power generated by the turbine impeller 7. Transmission can be performed efficiently, and the pump impeller rotates more efficiently.

[0051]

As is apparent from the above description, according to the turbine magnet drive pump of the present invention, the turbine power take-out magnet and the pump drive magnet are provided as a turbine side power transmission magnet and a pump side power transmission magnet, respectively. The diameters of the turbine-side power transmission magnets and the pump-side power transmission magnets can be further reduced because they are arranged inside. Therefore, it is possible to further reduce the relatively large rotational resistance of the turbine impeller and the pump impeller caused by the working fluid or the carrier fluid. As a result, the energy for driving the turbine impeller can be further saved and the turbine efficiency can be improved. Further, the power generated in the turbine impeller can be efficiently transmitted without loss. Furthermore, the pump impeller can be rotated more efficiently,
The pump efficiency can be improved. As a result, the system efficiency of the turbine magnet drive pump as a whole can be further improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a turbine magnet drive pump according to the present invention, in which a turbine impeller and a pump impeller are both drawn as a closed type impeller.

FIG. 2 shows an arrow X in a state where a front front shroud of the turbine impeller used in the embodiment shown in FIG. 1 is taken.
It is the figure seen from the direction.

3 is a sectional view taken along the line AOE in FIG.

4 is a sectional view taken along the line BO in FIG.

5 is a cross-sectional view taken along the line CO in FIG.

6 is a cross-sectional view taken along the line DO in FIG.

FIG. 7 is a diagram illustrating a blade outlet shape of the turbine impeller of the embodiment shown in FIG.

FIG. 8 is a view as seen from the direction of arrow Y with the front front shroud of the pump impeller used in the embodiment shown in FIG. 1 taken away.

9 is a sectional view taken along the line AOE in FIG.

10 is a diagram illustrating a blade inlet shape of the pump impeller of the embodiment shown in FIG.

11 is an enlarged view of a P portion in FIG.

FIG. 12 is an enlarged view of a Q portion in FIG.

FIG. 13 is a diagram showing test results on the head and efficiency of the turbine magnet drive pump according to the present invention.

FIG. 14 is a cross-sectional view of a conventional fluid drive pump.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Turbine magnet drive pump, 2 ... 1st casing, 3 ... 2nd casing, 4 ... 3rd casing, 5 ... 4th casing, 6 ... 5th casing, 7 ... Turbine impeller, 8 ... Pump impeller, 9 ... turbine inlet passage, 10 ...
Turbine outlet passage, 11 ... Pump inlet passage, 12 ... Pump outlet passage, 13 ... Turbine side partition member, 14 ... Turbine side support shaft, 16 ... Turbine power extraction magnet holding section, 17 ... Turbine power extraction magnet, 18 ... Stepped hole, 19 ... Passage, 20, 21, 22 ... O-ring, 23 ... Turbine side partition member, 24 ... Turbine side support shaft, 26 ... Pump driving magnet holding section, 27 ... Pump driving magnet, 28 ... Step Holes, 29 ... Passages, 30, 31, 32 ...
O-ring, 33 ... Rotating shafts, 34, 35 ... Bearings, 36 ... Turbine side power transmission magnet holding member, 38 ... Turbine side power transmission magnet, 39 ... Pump side power transmission magnet holding member, 41 ... Pump side power Transmission magnet, 42 ... Communication hole, 43 ... Fan blade, 44, 45
… Wearing

Claims (4)

[Claims] 1. A turbine impeller driven by a working fluid, a pump impeller that conveys a carrier fluid, a power transmission rotating member that transmits the power generated by the turbine impeller to the pump impeller, and the turbine. A turbine-side partition member that fluid-tightly separates the impeller and the power transmission rotary member; a pump-side partition member that fluid-tightly separates the pump impeller and the power transmission rotary member; A turbine power extraction magnet attached to the turbine impeller is disposed inside a tubular turbine power transmission magnet attached to one end side so as to face the turbine power transmission magnet via the turbine side partition member. Installed on the other end side of the power transmission rotary member and the turbine side magnetic coupling magnetically coupled to each other. Magnetic coupling by arranging a pump drive magnet attached to the pump impeller inside the cylindrical pump power transmission magnet facing the pump power transmission magnet via the pump side partition member. And a pump-side magnet coupling that are provided. 2. The turbine magnet drive pump according to claim 1, wherein the fluid in contact with the power transmission rotary member is a gas, or the periphery of the power transmission rotary member is a vacuum. 3. The pump impeller, wherein the meridian surface shape of the shroud connected to the boss is a concave arc-shaped rotating surface, and the boss shroud to which the blade inlet edge is attached is formed in a cylindrical shape substantially parallel to the rotation axis. The blade inlet edge is smoothly continuous from the boss shroud surface and largely protrudes toward the upstream side, and the blade inlet edge on the pump casing side is extended substantially at a right angle to the rotation axis to form a cylindrical boss. The inlet edge of the blade attached to the shroud and the inlet edge of the blade on the pump casing side are connected by an arc-shaped smooth curve that forms a convex shape on the upstream side to form the blade inlet edge, and the inlet angle of this blade is the boss shroud inlet edge. Is set to approximately 0 ° and gradually increases from the boss shroud side inlet edge toward the pump casing side inlet edge, and the boss shroud side and the pump casing are The turbine has a blade inlet having a shape in which the blade inlet angle between the blade and the ring side is smoothly changed, and the blade is formed by connecting the blade-shaped blade inlet to the blade outlet end with a smooth curve. In the impeller, the meridian surface of the shroud connected to the boss has a concave arcuate surface of revolution, and the boss shroud to which the blade outlet edge is attached is formed in a cylindrical shape substantially parallel to the rotation axis. From the turbine casing side to the turbine casing, the blade outlet edge on the turbine casing side extending substantially perpendicular to the rotation axis, and the blade outlet edge attached to the cylindrical boss shroud and the turbine casing. A vane outlet edge is formed by connecting the side vane outlet edge with a smooth arc-shaped curve that forms a convex shape on the downstream side, and the outlet angle of this blade is defined by the boss shroud side outlet edge. The blade outlet angle between the boss shroud side outlet edge and the turbine casing side outlet edge is set to be approximately 0 ° and gradually increases from the boss shroud side outlet edge toward the turbine casing side outlet edge. The turbine magnet drive pump according to claim 1 or 2, further comprising: a blade outlet having a curved shape, and a blade formed by connecting the blade inlet to the blade-shaped blade outlet end with a smooth curve. 4. The inlet angle of the blade of the pump impeller is set to an angle calculated by a conventional design at the inlet edge of the pump casing side, and the outlet angle of the blade of the turbine impeller is set to the turbine casing. The turbine magnet drive pump according to claim 3, wherein the side outlet edge is set to an angle calculated by a conventional design.