KR102222302B1 - Pump casing and magnet pump including the same - Google Patents

Abstract

A pump casing according to an embodiment of the present invention includes a suction casing forming an inlet space through which a fluid is introduced; And a volute casing forming a flow path through which fluid is introduced from the inflow space and discharged to the outside by an impeller, wherein the volute casing forms an arrangement space in which the impeller is disposed, and the suction The casing is detachable from the volute casing by a predetermined detachable member, and the suction casing has a suction body part forming the inflow space and a first fastening part to which the detachable member is fastened, and the volute casing includes the A volute body forming an arrangement space and a second fastening part to which the detachable member is fastened, and when the suction casing is connected to the volute casing by the attachable and detachable member, a first facing the volute casing It has an opposing surface, and when the volute casing is connected to the suction casing by the detachable member, the volute casing has a second opposing surface facing the first opposing surface, and is disposed in the arrangement space to support the impeller It further includes a support portion for supporting the tip of the support shaft, wherein the first facing surface may press the support portion in the axial direction so that the support portion does not swing in the arrangement space.

Description

Pump casing and magnetic pump including the same TECHNICAL FIELD [PUMP CASING AND MAGNET PUMP INCLUDING THE SAME}

The present invention relates to a pump casing and a magnetic pump including the same, and more particularly, a fluid is introduced from the inflow space by a suction casing and an impeller forming an inflow space into which the fluid is introduced and the introduced fluid is discharged to the outside. It relates to a pump casing including a volute casing forming a flow path, and a magnet pump including the same.

A conventionally known magnetic pump includes a front casing forming a pump chamber, and a rear casing forming a cylindrical space continuous with the pump chamber.

In the cylindrical space of the rear casing, a magnet can rotatably supported by a support shaft is disposed, and an impeller accommodated in the pump chamber is coupled to the magnet can.

A rotation driving unit magnetically coupled to the magnet can is disposed outside the rear casing, and the magnet can rotates by the driving force of the rotation driving unit.

When the magnet can rotates, the impeller coupled thereto rotates, the conveying fluid is introduced into the pump chamber from the cylindrical suction port formed in front of the front casing, and the conveying fluid is discharged from the discharge port on the side of the front casing.

The support shaft extends through the pump chamber to the inlet of the front casing.

The distal end of the support shaft is covered by a shaft support portion connected to the suction port, and the inner wall of the suction port and the shaft support portion are connected by a plurality of supporting legs.

Korean Patent Application Publication No. 10-2016-0122707 (published on October 24, 2016) discloses a magnetic pump.

Here, the front casing may be divided into a portion forming the suction port 4 through which the fluid is introduced and a portion forming the pump chamber 3, which is a space in which the impeller 13 is disposed.

Depending on the purpose of use of the magnetic pump, the size of the space defined by the suction port 4 and the size of the space defining the pump chamber 3 need to be different.

However, in such a magnetic pump, a portion forming the suction port 4 and a portion forming the pump chamber 3 are integrated, and thus there is a problem in that a large number of front casings must be manufactured depending on the intended use.

The present invention is to solve the above problems, and the front casing forms a flow path through which fluid is introduced from the inflow space and the introduced fluid is discharged to the outside by a suction casing and an impeller forming an inflow space into which fluid is introduced. It is intended to provide a pump casing that is manufactured separately as a volute casing that can be used by combining various types of suction casings and volute casings according to the purpose of use of a magnetic pump, and a magnetic pump including the same.

The problem to be solved by the present invention is not limited to the above-described problems, and problems that are not mentioned will be clearly understood by those of ordinary skill in the art from the present specification and the accompanying drawings. .

A pump casing according to an embodiment of the present invention includes a suction casing forming an inlet space through which a fluid is introduced; And a volute casing forming a flow path through which fluid is introduced from the inflow space and discharged to the outside by an impeller, wherein the volute casing forms an arrangement space in which the impeller is disposed, and the suction The casing is detachable from the volute casing by a predetermined detachable member, and the suction casing has a suction body part forming the inflow space and a first fastening part to which the detachable member is fastened, and the volute casing includes the A volute body forming an arrangement space and a second fastening part to which the detachable member is fastened, and when the suction casing is connected to the volute casing by the attachable and detachable member, a first facing the volute casing It has an opposing surface, and when the volute casing is connected to the suction casing by the detachable member, the volute casing has a second opposing surface facing the first opposing surface, and is disposed in the arrangement space to support the impeller It further includes a support portion for supporting the tip of the support shaft, wherein the first facing surface may press the support portion in the axial direction so that the support portion does not swing in the arrangement space.

According to the pump casing according to an embodiment of the present invention, the front casing forms a flow path through which fluid is introduced from the inflow space and the introduced fluid is discharged to the outside by a suction casing and an impeller forming an inflow space into which fluid is introduced. It has the advantage of being separately manufactured as a volute casing that can be used by combining various types of suction casings and volute casings according to the purpose of use of a magnetic pump.

The effects of the present invention are not limited to the above-described effects, and effects that are not mentioned will be clearly understood by those of ordinary skill in the art from the present specification and the accompanying drawings.

1 is a schematic cross-sectional view of a pump casing according to an embodiment of the present invention.
2 is a schematic exploded cross-sectional view of a pump casing according to an embodiment of the present invention.
Figure 3 is a schematic enlarged cross-sectional view of a portion of the pump casing in accordance with an embodiment of the present invention where the separation maintenance portion is omitted.
Figure 4 is a schematic enlarged cross-sectional view of a portion including a separation maintenance part in the pump casing according to an embodiment of the present invention.
5 is a schematic perspective view of a support portion of a pump casing according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiments, and those skilled in the art who understand the spirit of the present invention can add, change, or delete other elements within the scope of the same idea. Other embodiments included within the scope of the inventive concept may be easily proposed, but this will also be said to be included within the scope of the inventive concept.

A pump casing according to an embodiment of the present invention includes a suction casing forming an inlet space through which a fluid is introduced; And a volute casing forming a flow path through which fluid is introduced from the inflow space and discharged to the outside by an impeller, wherein the volute casing forms an arrangement space in which the impeller is disposed, and the suction The casing is detachable from the volute casing by a predetermined detachable member, and the suction casing has a suction body part forming the inflow space and a first fastening part to which the detachable member is fastened, and the volute casing includes the A volute body forming an arrangement space and a second fastening part to which the detachable member is fastened, and when the suction casing is connected to the volute casing by the attachable and detachable member, a first facing the volute casing The volute casing has a facing surface, and when the volute casing is connected to the suction casing by the detachable member, the volute casing has a second facing surface facing the first facing surface, and the first facing surface and the second facing surface It may further include a space maintaining unit disposed between the first and second facing surfaces to prevent the fluid from leaking between the surfaces.

In addition, the space keeping part may be an elastic material.

In addition, when the suction casing and the volute casing are connected by the detachable member, the space maintaining part prevents the first fastening part and the second fastening part from coming into contact with the first fastening part and the second fastening part. A space can be formed between them.

In addition, the separation maintaining unit may be exposed to the separation space.

In addition, the separation maintaining unit may include a first separation unit connected to the suction casing and a second separation unit connected to the volute casing.

In addition, a support portion disposed in the arrangement space to support the tip of the support shaft supporting the impeller; further comprising, the first separation holding portion to press the support portion in the axial direction so that the support portion does not oscillate in the arrangement space. I can.

In addition, the second space maintaining part may press the support part in a direction perpendicular to the axial direction so that the support part does not swing in the arrangement space.

In addition, the first spaced portion is a first spaced contact portion in contact with the second spaced portion, a first support contact portion in contact with the support portion, and the first support contact portion extends into the inflow space so as not to contact the support portion. A first extension may be provided.

In addition, the second spaced portion is a second spaced contact portion in contact with the first spaced portion, a second support contact portion in contact with the support portion, and the second support contact portion extends into the arrangement space so as not to contact the support portion. A second extension may be provided.

A magnetic pump according to another embodiment of the present invention includes the pump casing; An outer magnet rotated by a motor; An inner magnet rotated by the outer magnet; And an impeller rotated by the inner magnet.

Components having the same function within the scope of the same idea shown in the drawings of each embodiment will be described using the same reference numerals.

1 is a schematic cross-sectional view of a pump casing according to an embodiment of the present invention.

2 is a schematic exploded cross-sectional view of a pump casing according to an embodiment of the present invention.

Figure 3 is a schematic enlarged cross-sectional view of a portion of the pump casing in accordance with an embodiment of the present invention in which the separation maintenance part is omitted.

Figure 4 is a schematic enlarged cross-sectional view of a portion including a separation maintenance part in the pump casing according to an embodiment of the present invention.

5 is a schematic perspective view of a support part of a pump casing according to an embodiment of the present invention.

In the accompanying drawings, in order to more clearly express the technical idea of the present invention, parts that are inferior to the technical idea of the present invention or that can be easily derived from those skilled in the art have been simplified or omitted.

As shown in FIGS. 1 to 5, the pump casing 10 according to an embodiment of the present invention may mean a component of a pump that implements a fluid flow.

For example, the pump casing 10 may be configured to form a flow path through which a fluid flows.

As an example, the pump casing 10 is a suction casing 100 that forms an inlet space S1 into which the fluid is introduced, and the fluid is introduced from the inlet space S1 by an impeller, and the introduced fluid is discharged to the outside. It may include a volute casing 200 forming a flow path.

For example, the suction casing 100 and the volute casing 200 may be made of metal.

As an example, the suction casing 100 may have a configuration in which the inflow space S1 is formed so that the fluid can flow into the inflow space S1 from the outside by the impeller.

For example, the suction casing 100 may be connected to a conduit and/or pipe (not shown) to receive fluid from the conduit and/or pipe.

For example, the volute casing 200 may be configured to allow fluid to flow from the inflow space S1 by the impeller.

For example, the volute casing 200 may form a flow path through which the fluid received from the inflow space S1 is transferred to the outside.

For example, the volute casing 200 may be connected to a conduit and/or pipe to transfer fluid to the conduit and/or pipe.

Here, as an example, the volute casing 200 may form an arrangement space S2 in which the impeller is disposed.

That is, the impeller may be disposed on the arrangement space S2 to express a rotational force, and a fluid may be moved by the rotational force.

That is, the fluid may flow from the outside to the inflow space S1 formed by the suction casing 100 by the impeller, and along the flow path formed by the volute casing 200 from the inflow space S1 It may be discharged to the outside through the arrangement space (S2).

Here, as an example, the suction casing 100 may be detachable from the volute casing 200 by a predetermined detachable member (T).

That is, the suction casing 100 may be connected to or separated from the volute casing 200 by the detachable member T.

The pump casing 10 may require the inflow space S1 and/or the arrangement space S2 of various sizes and/or shapes according to the intended use.

Therefore, the suction casing 100 and the volute casing 200 are not formed integrally, but are configured to be detachable from each other, and the pump casing 10 has various sizes and/or shapes of the suction casing ( There is an advantage that 100) and the volute casing 200 may be formed in combination with each other.

For example, the detachable member (T) may be a screw threaded bolt or the like, but is not limited thereto, and if a configuration capable of connecting or separating the suction casing 100 and the volute casing 200, those skilled in the art It can be varied in various ways from the standpoint.

However, in the following description, for convenience of explanation, it is assumed that the detachable member T is a screw threaded bolt.

Here, as an example, the suction casing 100 may include a suction body part 110 forming the inflow space S1 and a first fastening part 120 to which the detachable member T is fastened.

For example, a plurality of the first fastening parts 120 may be formed at a predetermined position of the suction body part 110, and the detachable member T may be fastened to the first fastening part 120. have.

For example, the first fastening part 120 may form a thread corresponding to the thread of the detachable member T.

Here, as an example, the volute casing 200 may include a volute body part 210 forming the arrangement space S2 and a second fastening part 220 to which the detachable member T is fastened. have.

For example, a plurality of second fastening parts 220 may be formed at positions corresponding to the first fastening parts 120 on the volute body part 210.

For example, the second fastening part 220 may form a thread corresponding to the thread of the detachable member T.

As a result, when the detachable member T is fastened to the first fastening part 120 and to the second fastening part 220 at the same time, between the suction casing 100 and the volute casing 200 You can implement the connection.

Here, as an example, the suction casing 100 has a first facing surface 130 facing the volute casing 200 when connected to the volute casing 200 by the detachable member T can do.

In addition, when the volute casing 200 is connected to the suction casing 100 by the detachable member T, the volute casing 200 may have a second opposing surface 230 facing the first opposing surface 130. have.

As an example, the first facing surface 130 may mean a surface facing the volute casing 200, and the second facing surface 230 means a surface facing the suction casing 100 can do.

That is, the first facing surface 130 and the second facing surface 230 may mean surfaces facing each other by connection of the suction casing 100 and the volute casing 200.

Therefore, when the suction casing 100 and the volute casing 200 are not firmly connected, the fluid in the inflow space S1 and/or the arrangement space S2 is It may leak to the outside through the second facing surface 230.

For example, the first facing surface 130 and the second facing surface 230 are the first fastening part 120 based on the virtual central axis of the inflow space S1 and/or the arrangement space S2. ) And the second fastening part 220 may be formed inside the radial direction.

Here, as an example, the pump casing 10 has the first facing surface 130 and the second facing surface to prevent leakage of fluid between the first facing surface 130 and the second facing surface 230. It may further include a space maintaining portion 300 disposed between the surfaces 230.

As an example, the separation holding part 300 is disposed between the first facing surface 130 and the second facing surface 230 so that the suction casing 100 is provided with the volute by the detachable member (T). When connected to the casing 200, it may be pressed from the first facing surface 130 and the second facing surface 230.

Therefore, the separation maintaining unit 300 minimizes the separation distance between the first and second facing surfaces 230, that is, sealing, so that the first facing surface 130 and the first facing surface 130 and the second facing surface 230 are sealed. 2 It is possible to prevent leakage of fluid between the opposite surfaces 230.

To explain this in more detail, as shown in FIG. 3, when there is no space holding part 300 between the first and second facing surfaces 130, the first facing surface 130 There is a risk that the fluid in the inflow space S1 and/or the arrangement space S2 may leak to the outside through the space between the and the second facing surface 230.

In order to prevent this, as shown in FIG. 4, the separation maintaining part 300 is disposed between the first facing surface 130 and the second facing surface 230 to minimize leakage of fluid.

For example, the spacing holding part 300 may be made of an elastic material.

As a result, the sealing function of the space maintaining unit 300 can be further maximized.

Here, as an example, when the suction casing 100 and the volute casing 200 are connected by the detachable member (T), the first fastening part 120 and the A separation space S3 may be formed between the first fastening part 120 and the second fastening part 220 by preventing the second fastening part 220 from contacting.

To explain this in more detail, when the first fastening part 120 and the second fastening part 220 are completely fastened to the detachable member T, that is, the suction casing 100 and the volute casing 200 Even when) are firmly connected, the first fastening part 120 and the second fastening part 220 may not be in contact with each other by the spacing holding part 300.

That is, the first fastening part 120 and the second fastening part 220 may be spaced apart from each other by the spacing holding part 300, and as a result, the first fastening part 120 and the second fastening part 120 The separation space S3 may be formed between the parts 220.

In general, the location where the fluid leaks from the inflow space S1 and/or the arrangement space S2 is very likely between the first fastening part 120 and the second fastening part 220. , Even if the separation holding part 300 is firmly connected to the suction casing 100 and the volute casing 200 by the detachable member T, the first fastening part 120 and the second fastening part By forming the spaced space S3 by preventing the 220 from contacting each other, the operator installs a sensing device (not shown) capable of detecting the leakage of fluid in the spaced space S3 to prevent leakage of fluid. It can be easily grasped.

Furthermore, when a fluid leak is sensed, the operator can visually and easily recognize whether the fluid leaks on the separation space S3, so that a quick response is possible.

Therefore, the separation maintaining unit 300 forms the intended separation space (S3) even if it is deformed to the elastic limit by the pressure of the first facing surface 130 and the second facing surface 230, the operator It can be quickly confirmed that the fluid leaks between the first and second facing surfaces 130 and 230.

Here, as an example, the separation maintaining unit 300 may be exposed to the separation space (S3).

As an example, one end of the separation unit 300 may be exposed onto the separation space S3, and the operator may determine whether the separation unit 300 is damaged through the separation space S3, and the separation Whether the holding unit 300 is disposed at an intended position and/or whether a fluid leaks through the separation holding unit 300 can be easily determined.

Here, as an example, the separation unit 300 includes a first separation unit 310 connected to the suction casing 100 and a second separation unit 320 connected to the volute casing 200 Can be equipped.

That is, the spacing holding part 300 may be formed of a combination of the first spacing maintaining part 310 and the second spacing maintaining part 320 rather than being formed of a single elastic body.

For example, the first space keeping part 310 may be connected to the suction casing 100 to cover at least a part of the first opposing surface 130 of the suction casing 100.

For example, the second separation holding part 320 may be connected to the volute casing 200 to cover at least a part of the second facing surface 230 of the volute casing 200.

If the separation holding part 300 is formed of a single elastic body and is connected to either the suction casing 100 or the volute casing 200, the first opposing surface 130 and the first 2 When the suction casing 100 and the volute casing are connected to each other by the detachable member T between the opposite surfaces 230, the suction casing 100 or the volute casing 200 is unintended. Due to the pressurization from, the spacing maintenance part 300 is not disposed at an intended position between the first and second facing surfaces 130 and 230, and there is a problem that the position may be changed.

Accordingly, the separation unit 300 is composed of the first separation unit 310 connected in advance to the suction casing 100 and the second separation unit 320 connected in advance to the volute casing 200 Thus, even when the suction casing 100 and the volute casing are connected to each other by the detachable member (T), the first separation unit 310 and the second separation unit 320 are not changed in position, It may be disposed at an intended position between the first facing surface 130 and the second facing surface 230.

Here, as an example, the pump casing 10 may further include a support part 400 disposed in the arrangement space S2 to support the tip of a support shaft (not shown) supporting the impeller.

For example, the support shaft may be a member that supports the impeller.

For example, the impeller may be supported by the support shaft and rotated based on the support shaft.

Here, as an example, the tip of the support shaft may pass through the impeller and be supported by the support part 400.

For example, the support part 400 is a support body part 410 forming an accommodation space S4 for accommodating the front end of the support shaft, and the support body part 410 protrudes from the inflow space S1. A vortex reduction unit 420 that reduces the vortex flow of the fluid moving to the arrangement space S2 and a space where the fluid flows apart from the vortex reduction unit 420 are formed, and the support body 410 is disposed in the arrangement space ( It may be provided with a support extension 430 supported by the suction casing 100 and/or the volute casing 200 so as to be disposed at a predetermined position on S2).

For example, the support shaft may be disposed on the receiving space S4 to transmit the load of the impeller to the support body part 410.

For example, the support body 410 may receive the load of the impeller and transmit it to the support extension 430, and the support extension 430 may transfer the load of the impeller to the suction casing 100 or It can be transferred to the volute casing 200.

For example, the support part 400 may be disposed on the placement space S2, and when the suction casing 100 and the volute casing 200 are separated, the support part 400 may be separated from the placement space S2. May be.

Here, as an example, the first facing surface 130 may press the support part 400 in the axial direction so that the support part 400 does not swing in the arrangement space S2.

To explain this in more detail, the suction casing 100 may be moved toward the volute casing 200 by fastening the detachable member T, and as a result, the first opposing surface 130 is the detachable member It can be moved toward the volute casing 200 by the fastening of (T).

Accordingly, the first opposing surface 130 may press the support extension part 430 of the support part 400 disposed on the arrangement space S2 in the axial direction.

Here, as an example, the first space keeping part 310 may press the support part 400 in the axial direction so that the support part 400 does not swing in the arrangement space S2.

To explain this in more detail, the first space keeping part 310 may be disposed between the first facing surface 130 and the support part 400, and the suction casing 100 is the detachable member (T) It can be moved toward the volute casing 200 by fastening of, and as a result, the first space keeping part 310 moves toward the volute casing 200 by pressing the first opposing surface 130 Can be.

In this case, the first space keeping part 310 may press the support extension part 430 of the support part 400 toward the volute casing 200.

As a result, the support part 400 may be pressed by the support shaft and the first space keeping part 310 to be fixed at a predetermined position on the arrangement space S2.

At this time, in that the first space keeping part 310 is an elastic material, the support extension part 430 of the support part 400 pressed by the first space keeping part 310 is not damaged and the It may be fixed at a predetermined position on the arrangement space S2.

As an example, the axial direction may mean a horizontal direction in FIG. 1.

Here, as an example, the second separation holding part 320 may press the support part 400 in a direction orthogonal to the axial direction so that the support part 400 does not swing in the arrangement space S2. .

To explain this in more detail, the second separation holding part 320 may be disposed between the volute body 210 and the support part 400, and the support part 400 is the second separation holding part ( 320) may be forcibly fitted, and the second spacing holding part 320 may express an elastic force to press the support part 400 in the orthogonal direction.

In addition, when the impeller is rotated with the axial direction as a rotation axis, the support part 400 may receive a centrifugal force radially outward from the support shaft with respect to the rotation axis, and the support part 400 The support extension 430 may press the second separation holding part 320 in the orthogonal direction by a centrifugal force.

That is, by the centrifugal force of the support part 400, the second space keeping part 320 may be pressed against the support extension part 430 of the support part 400.

As a result, a centrifugal force acts between the second separation holding part 320 and the volute body part 210 to further maximize the sealing effect.

As an example, the first space keeping part 310 has a first spaced contact part 311 in contact with the second space keeping part 320, a first support contact part 313 in contact with the support part 400, and the A first extension part 315 may be provided that extends from the first support contact part 313 to the inflow space S1 and does not contact the support part 400.

For example, the first separation contact part 311 may be in contact with the second separation maintenance part 320 to seal between the second separation maintenance part 320 and the first separation maintenance part 310.

For example, the first support contact part 313 may pressurize the support extension part 430 of the support part 400 to seal the space between the first separation maintenance part 310 and the suction body part 110. have.

In addition, the first extension part 315 extends from the first support contact part 313 to be generated when the first support contact part 313 presses the support part 400 ( 313) can be prevented from being damaged at the end.

In addition, the first extension part 315 may guide the first spaced contact part 311 and the support contact part to be disposed at a predetermined position of the suction casing 100.

In addition, as an example, the second spaced apart part 320 has a second spaced contact part 321 in contact with the first spaced part 310, and a second support contact part 323 in contact with the support part 400 And a second extension part 325 extending from the second support contact part 323 to the arrangement space S2 and not in contact with the support part 400.

For example, the second spacing contact part 321 may be in contact with the first spacing part 310 to seal between the first spacing part 310 and the second spacing part 320.

For example, the second support contact part 323 may pressurize the support extension part 430 of the support part 400 to seal the space between the second separation maintenance part 320 and the suction body part 110. have.

In addition, the second extension part 325 extends from the second support contact part 323 so that the second support contact part 323 may be generated when the second support contact part 323 presses the support part 400 ( 323) can prevent damage to the end.

In addition, the second extension part 325 may guide the second spaced contact part 321 and the support contact part to be disposed at a predetermined position of the volute casing 200.

The magnet pump according to another embodiment of the present invention includes the pump casing 10, an outer magnet (not shown) rotated by a motor (not shown), an inner magnet (not shown) rotated by the outer magnet, and the It may include the impeller rotated by the inner magnet.

For example, when the motor is driven, the outer magnet connected to the motor may rotate around a predetermined rotation axis.

For example, the inner magnet may form a magnetic force with the outer magnet, and may be rotated around a predetermined axis of rotation by interlocking with the rotation of the outer magnet.

When the inner magnet is rotated, the impeller connected to the inner magnet may be rotated.

As a result, the fluid is moved from the outside to the inflow space (S1) by the rotation of the impeller, is moved from the inflow space (S1) to the arrangement space (S2), and from the arrangement space (S2) to the outside. Can be.

The components of the magnetic pump are one configuration of another known magnetic pump, and detailed descriptions will be omitted.

In the above, the configuration and features of the present invention have been described based on the embodiments according to the present invention, but the present invention is not limited thereto, and it is understood that various changes or modifications can be made within the spirit and scope of the present invention. It will be apparent to those skilled in the art, and therefore, such changes or modifications are found to be within the scope of the appended claims.

100: suction casing
200: volute casing
300: separation maintenance unit
400: support

Claims (10)

A suction casing forming an inlet space through which fluid is introduced; And
Includes; a volute casing forming a flow path through which fluid is introduced from the inflow space by an impeller and the introduced fluid is discharged to the outside,
The volute casing,
To form an arrangement space in which the impeller is arranged,
The suction casing,
It is possible to attach and detach the volute casing by a predetermined detachable member,
The suction casing,
A suction body forming the inflow space and a first fastening part to which the detachable member is fastened,
The volute casing,
It has a volute body portion forming the arrangement space and a second fastening portion to which the detachable member is fastened,
The suction casing,
When connected to the volute casing by the detachable member,
It has a first facing surface facing the volute casing,
The volute casing,
When connected to the suction casing by the detachable member,
It has a second facing surface facing the first facing surface,
It further includes; a support portion disposed in the arrangement space to support the tip of the support shaft supporting the impeller,
The first facing surface,
Pressing the support portion in the axial direction so that the support portion does not oscillate in the arrangement space,
The first and second facing surfaces to prevent leakage of fluid between the first facing surface and the second facing surface to prevent the space between the holding portion; further comprising,
The separation maintenance part,
It is disposed between the first opposing surface and the support to pressurize the support in the axial direction,
Pump casing.
delete delete The method of claim 1,
The separation maintenance part,
Which is an elastic material,
Pump casing.
The method of claim 4,
The separation maintenance part,
When the suction casing and the volute casing are connected by the detachable member,
Forming a space between the first fastening part and the second fastening part by preventing the first fastening part and the second fastening part from contacting,
Pump casing.
The method of claim 5,
The separation maintenance part,
Exposed to the spaced space,
Pump casing.
The method of claim 6,
The separation maintenance part,
A first separation unit connected to the suction casing and
Having a second separation holding part connected to the volute casing,
Pump casing.
The method of claim 7,
The first separation maintaining unit,
Pressing the support portion in the axial direction so that the support portion does not oscillate on the arrangement space,
Pump casing.
The method of claim 8,
The second separation maintaining unit,
It is disposed between the support portion and the volute body portion so that the support portion does not swing in the arrangement space, and presses the support portion in a direction orthogonal to the axial direction,
Pump casing.
The pump casing according to any one of claims 1 and 4 to 9;
An outer magnet rotated by a motor;
An inner magnet rotated by the outer magnet; And
Containing; an impeller rotated by the inner magnet
Magnet pump.

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