JP6527008B2 - Joint structure of joint members, joint method of joint members, and centrifugal pump using the same - Google Patents

Description

  The present invention relates to a joint structure of joint members joining joint members to an opening of a main body case, a joint method of joint members, and a centrifugal pump using the same.

  The present invention relates to a centrifugal pump for circulating a fluid in a closed circuit, such as a refrigerant used in a refrigerant circulation circuit such as an air conditioner and a refrigerator, and a cooling water used in a cooling circulation circuit such as components and devices generating heat. . And this centrifugal pump is a centrifugal pump for which pressure resistance and airtightness are required.

  Conventionally, patent document 1 (Unexamined-Japanese-Patent No. 2003-13878) is disclosed about the centrifugal pump for circulating a liquid. In this patent document 1, the structure of the impeller member is improved so as to form a plurality of flow path portions extending radially from the center of the impeller member, the change in the amount of circulating cooling water is small, and the change in cooling performance is A centrifugal pump is disclosed that is configured to be difficult to wake up.

  Further, in Patent Document 2 (Japanese Patent Laid-Open No. 2003-161284), an impeller member having a large number of blades formed on the outer periphery and a rotor magnet provided on the inner periphery is provided, and a motor stator is provided on the inner periphery side of the rotor magnet. And a thin centrifugal pump capable of achieving efficient cooling.

JP 2003-13878 A JP 2003-161284 A

  However, such a conventional centrifugal pump does not have a strong and airtight structure. For example, in order to circulate coolant such as internal combustion engine, fluid such as refrigerant used in refrigerant circulation circuit such as air conditioner / refriger, flammable fluid, fluid having toxicity etc. There are problems in pressure resistance and airtightness.

  Moreover, in the structure of the conventional centrifugal pump, the coil part which is a motor stator can not be desorbed. For this reason, even if it is intended to use a metal case, piping or the like for use in a centrifugal pump which is required to have pressure resistance and air tightness, fixation by heating such as welding, brazing, welding can not be performed.

  Furthermore, the bearing of the impeller member is composed of a bearing disposed on one side of the shaft of the impeller member, which is unstable and has problems in durability and quietness.

  Furthermore, in the centrifugal pump of such a conventional structure, since the bearing is in the fluid and the lubricating oil can not be used, the rotation of the impeller member causes the shaft member and the impeller member to wear and damage, and the impeller member Backlash and eccentricity occur, making it difficult to maintain the desired target pump performance.

  Further, in such a centrifugal pump, when the suction side joint member (suction side conduit) and the discharge side joint member (discharge side conduit) are fixed so as to communicate with the main body case, the following problems occur. There is.

  FIGS. 7A and 7B are partial enlarged cross-sectional views schematically showing such a problem in a centrifugal pump for a suction side joint member (suction side conduit).

  The centrifugal pump 200 shown in FIGS. 7A and 7B includes a metal main case 204 that accommodates the rotary vane member 202. The main body case 204 includes an upper main body case 206, and the upper main body case 206 includes a top wall 208 and a side peripheral wall 210 extending downward from the outer periphery of the top wall 208.

  And as shown to FIG. 7 (A) and FIG. 7 (B), the opening part for fixing the metal suction side joint member (suction side conduit) 212 to the side peripheral wall 210 of the upper side main body case 206 A flange 214 on which 210a is formed is formed.

  As shown in FIGS. 7A and 7B, the suction side joint member 212 is fixed to the flange 214 in a sealed state by, for example, welding, brazing, welding or the like. Thus, the suction side coupling member 212 is in communication with the inside of the main body case 204.

  Further, as shown in FIGS. 7A and 7B, the main body case 204 is provided with a lower main body case (rotor case) 216. The outer peripheral flange 220 of the lower main body case 216 is fixed in a sealed state to the inner wall of the lower end 218 of the side peripheral wall 210 of the upper main body case 206 by, for example, welding, brazing, welding. Thus, an internal space S1 surrounded by the upper main body case 206 and the lower main body case 216 is formed in the main body case 204 (see FIG. 9A described later).

  Further, as shown in FIGS. 7A and 7B, the main body case 204 is provided with a wing case 222. The outer peripheral flange 224 of the blade case 222 is fixed to the side peripheral wall 210 of the upper main body case 206 in a sealed state by, for example, welding, brazing, welding, etc. on the suction side joint member 212 side. ing.

  As a result, the rotary portion accommodation space S2 is formed by the blade case 222 and the lower main body case 216 (see FIG. 9B described later).

  Thus, as indicated by an arrow C in FIG. 7A and FIG. 7B, the fluid drawn from the suction side joint member 212 is a fluid introduction flow formed by the blade case 222 and the upper main body case 206. From the path 226, it is introduced into the rotating portion accommodation space S2.

  However, as shown in FIG. 7A, when the insertion margin of the suction side joint member 212 to the opening 210a on the suction side joint side of the side peripheral wall 210 of the upper main body case 206 is large (FIG. 7A) (See projection distance H1) of

  In this case, as shown in FIG. 7A, the distance L between the tip end 212a of the suction side joint member 212 on the side of the main body case 204 and the side peripheral wall 228 of the blade case 222 becomes small. The inflow of fluid from the side joint member 212 is impeded, and the flow rate is reduced.

On the other hand, as shown to FIG. 7 (B), the insertion margin of the suction side coupling member 212 to opening part 210a by the side of the suction side coupling of the side peripheral wall 210 of the upper side main body case 206 may become small.
In this case, as shown in FIG. 7B, for example, the amount of wraparound of the brazing material or the like decreases, and the bonding area decreases. As a result, the strength of the adhesion of the suction side joint member 212 to the flange 214 formed on the side peripheral wall 210 of the upper main body case 206 is insufficient, and an airtight failure occurs.

  Similarly, FIGS. 8A and 8B are partially enlarged cross-sectional views schematically showing such problems in the centrifugal pump for the discharge side joint member (discharge side conduit). The same members as those in FIGS. 7A and 7B are denoted by the same reference numerals and the detailed description thereof will be omitted.

  As shown in FIGS. 8A and 8B, the side peripheral wall 210 of the upper main body case 206 is made of metal so as to face the opening 210a for fixing the suction side joint member 212. A flange 232 formed with an opening 210 b for fixing the discharge side joint member (discharge side conduit) 230 is formed.

On the other hand, in the blade case 222, an opening 222a is formed in the side peripheral wall 228 of the blade case 222 on the discharge side joint member 230 side. Then, as shown in FIG. 8A, the periphery of the opening 222a of the side peripheral wall 228 of the blade case 222 is a flange 232 of the side peripheral wall 210 of the upper main body case 206 together with the discharge side joint member 230, for example , Sealed by welding, brazing and welding.

  However, as shown in FIG. 8A, when the insertion margin of the discharge side joint member 230 to the opening 210b on the discharge side joint side of the side peripheral wall 210 of the upper main body case 206 is large (FIG. 8A) (See projecting distance H2).

  In this case, as shown in FIG. 8A, the inflow of the fluid into the discharge side joint member 230 is hindered by the projecting portion 230a of the discharge side joint member 230 protruding to the main body case 204 side. , The flow rate will be reduced.

On the other hand, as shown in FIG. 8B, the insertion margin of the discharge side joint member 230 to the opening 210b on the discharge side joint side of the side peripheral wall 210 of the upper main body case 206 may be small.
In this case, as shown in FIG. 8B, for example, the amount of wraparound of the brazing material or the like decreases, and the bonding area decreases. As a result, the strength of the adhesion of the discharge side joint member 230 to the flange 232 formed on the side peripheral wall 210 of the upper main body case 206 is insufficient, and an airtight failure occurs.

  In view of such a present situation, the present invention can define the insertion position of the joint member with respect to the opening of the main body case, and can reduce the flow rate due to excessive insertion of the joint member (conduit) into the opening. It is an object of the present invention to provide a joint structure of joint members which can be prevented and insufficient in adhesion due to insufficient insertion and air tightness does not occur, a joint method of joint members, and a centrifugal pump using the same. .

  In the present invention, a metal case and piping having high airtightness can be used, which can be fixed by heating such as welding, brazing and welding, and for example, refrigerant, flammable fluid, toxic fluid, etc. are circulated in a closed circuit. It is possible to use it for a centrifugal pump which is required to have pressure resistance, air tightness and corrosion resistance, and an object thereof is to provide a centrifugal pump having excellent pump performance.

The present invention has been invented to achieve the problems and purposes in the prior art as described above, and the joint structure of the joint member of the present invention is
A joint structure of a joint member for joining a joint member to an opening of a main body case,
A stopper for defining an insertion position of the joint member is formed on the main body side or the joint member side with respect to the opening of the main body case.

  With this configuration, the stopper for defining the insertion position of the joint member is formed on the main body side or the joint member side, so the insertion position of the joint member with respect to the opening of the main body case Can be defined.

  Therefore, it is possible to prevent a decrease in flow rate due to excessive insertion of the joint member (conduit) into the opening, and join the joint member without insufficient strength of adhesion due to insufficient insertion of the joint member (conduit) or airtightness failure. The structure can be provided.

  Further, in the joint structure of the joint member according to the present invention, the stopper abuts on the end of the joint member on the side of the main body case to define the insertion position of the joint member with respect to the opening of the main body case. It is characterized in that it is constituted by a contact portion.

  By this configuration, the contact portion for defining the insertion position of the joint member contacts the tip end of the joint member on the main body case side and functions as a stopper. Thereby, the insertion position of the joint member can be defined with respect to the opening of the main body case.

  Further, the joint structure of the joint member of the present invention is characterized in that the contact portion is formed at the opening of the main body case.

  By this configuration, the contact portion formed in the opening of the main body case for defining the insertion position of the joint member contacts the tip of the joint member on the main body case side and functions as a stopper. Thereby, the insertion position of the joint member can be defined with respect to the opening of the main body case.

  Further, the joint structure of the joint member according to the present invention is characterized in that the contact portion is formed in a partition case joined to the main body case in order to partition the inside of the main body.

  In this manner, the contact portion may be formed in a partition case joined to the main body case in order to partition the inside of the main body.

  Further, the joint structure of the joint member according to the present invention is characterized in that the stopper is formed of an enlarged diameter portion in which the outer diameter of the joint member is formed larger than the inner diameter of the opening portion of the main body case.

  By this configuration, the enlarged diameter portion in which the outer diameter of the joint member is formed larger than the inner diameter of the opening of the main body case abuts on the opening and functions as a stopper. Thereby, the insertion position of the joint member can be defined with respect to the opening of the main body case.

  Further, the joint structure of the joint member according to the present invention is characterized in that the stopper is formed of a projecting portion in which the side peripheral wall of the joint member is formed larger than the inner diameter of the opening of the main body case.

  With such a configuration, the projecting portion in which the side peripheral wall of the joint member is formed larger than the inner diameter of the opening of the main body case abuts on the opening and functions as a stopper. Thereby, the insertion position of the joint member can be defined with respect to the opening of the main body case.

  The joint structure of the joint member according to the present invention is characterized in that the projection is annularly formed on the side peripheral wall of the joint member.

  Thus, the protrusion may be annularly formed on the side peripheral wall of the joint member.

  Further, in the joint structure of the joint member according to the present invention, the projection is constituted by a plurality of projections which are annularly formed on the side peripheral wall of the joint member at predetermined intervals.

  As described above, the projecting portion may be configured by a plurality of projecting portions that are annularly formed on the side peripheral wall of the joint member at predetermined intervals.

  The joint member joining method of the present invention is characterized in that the joint member is joined to the opening of the main body case by the joint member joint structure described in any of the above.

  A pump according to the present invention is characterized by including the joint structure of any one of the above-described joint members.

  In the pump of the present invention, the pump is a centrifugal pump.

Also, the pump of the present invention is
The centrifugal pump
A rotating blade member comprising an impeller member and a rotor magnet provided below the impeller member;
A metal body case for accommodating the rotating blade member;
A metal suction side joint member provided in communication with the main body case in order to introduce the fluid into the impeller member;
A metal discharge side joint member provided in communication with the main body case in order to discharge fluid by rotation of the impeller member;
And a coil portion arranged to be located around the rotor magnet and rotating a rotary blade member,
The body case is
Upper body case,
A lower main body case fixed to the upper main body case;
An inner space formed by the upper body case and the lower body case is partitioned to form a fluid introduction flow path in the upper side, and a blade case is formed in the lower side to form a rotary portion accommodation space for accommodating the rotary vane members. ,
It is characterized in that the main body side on which the stopper is formed is either or both of the upper main body case and the blade case.

  If the joint structure of the joint member of the present invention is applied to the centrifugal pump having such a configuration, it is possible to prevent a decrease in flow rate due to excessive insertion of the joint member (conduit) into the opening, and secure strength due to insufficient insertion. To provide a centrifugal pump that is required to have pressure resistance, air tightness, and corrosion resistance by circulating a refrigerant, a flammable fluid, a fluid having toxicity, etc. in a closed circuit without causing shortage or air tightness. be able to.

According to the present invention, since the stopper for defining the insertion position of the joint member is formed on the main body side or the joint member side, the insertion position of the joint member is specified with respect to the opening of the main body case. can do.
Therefore, it is possible to prevent a decrease in flow rate due to excessive insertion of the joint member (conduit) into the opening, and to provide a joint structure of the joint member that does not cause insufficient strength of adhesion due to insufficient insertion and airtightness. it can.

FIG. 1 is a longitudinal sectional view of a centrifugal pump of the present invention. FIG. 2 is a partial enlarged cross-sectional view of the centrifugal pump of the present invention of FIG. FIG. 3 is a partially enlarged sectional view similar to FIG. 2 showing another embodiment in which the joint structure of the joint member of the present invention is applied to a centrifugal pump. FIG. 4 is a partially enlarged sectional view similar to FIG. 2 showing another embodiment in which the joint structure of the joint member of the present invention is applied to a centrifugal pump. FIG. 5 is a partially enlarged sectional view similar to FIG. 2 showing another embodiment in which the joint structure of the joint member of the present invention is applied to a centrifugal pump. FIG. 6 is a partially enlarged cross-sectional view similar to FIG. 2 showing another embodiment in which the joint structure of the joint member of the present invention is applied to a centrifugal pump. FIG. 7 is a partially enlarged cross-sectional view schematically showing the suction side joint member (suction side conduit) of the centrifugal pump. FIG. 8 is a partially enlarged cross-sectional view schematically showing the discharge side joint member (discharge side conduit) of the centrifugal pump. FIG. 9 is a schematic cross-sectional view for explaining the arrangement of the internal space S1, the fluid introduction flow path 84, and the rotation portion accommodation space S2 of the centrifugal pump of the present invention of FIG.

Hereinafter, embodiments (examples) of the present invention will be described in more detail based on the drawings.
Example 1

FIG. 1 is a longitudinal sectional view showing an embodiment in which the joint structure of the joint member of the present invention is applied to a centrifugal pump, and FIG. 2 is a partially enlarged sectional view of the centrifugal pump of FIG.
In addition, in the present specification, the terms indicating the vertical direction such as “upper”, “upper”, “upper”, “lower”, “lower”, “lower” and the like indicate the vertical direction in each drawing. It shows the relative positional relationship of each member, not the absolute positional relationship.

  In FIGS. 1 and 2, reference numeral 10 generally indicates the centrifugal pump of the present invention.

  As shown in FIGS. 1 and 2, the centrifugal pump 10 of the present invention is provided with a rotating blade member 12. As shown in FIGS. 1 and 2, the rotary blade member 12 includes a plurality of impeller members 16 radially extended in the outer peripheral direction on the upper portion of the circular tubular bearing portion 14.

  The number of impeller members 16 may be selected according to the application of the centrifugal pump 10 and the required pump capacity, and is not particularly limited.

  As shown in FIG. 1, the impeller member 16 has a base end portion 18 extended from the bearing portion 14 in the upper outer peripheral direction and an enlarged diameter portion 20 expanded in the outer peripheral direction upward from the base end portion 18. And an outer blade portion 22 extended from the enlarged diameter portion 20 in the outer circumferential direction.

  By making the shape of the impeller member 16 into such a shape, the discharge capacity can be improved by the action of the outer blade portion 22 due to the rotation of the impeller member 16.

  Further, the rotary vane member 12 is spaced apart from the outer periphery of the bearing portion 14 by a constant distance, and the rotor magnet housing portion 24 is formed on the outer periphery of the base end portion 18. The rotor magnet housing portion 24 includes a flange portion 26 extending downward from the lower portion of the base end portion 18 and a support portion 28 in which the diameter of the tip of the flange portion 26 is enlarged.

  And in the mounting part 30 comprised from these flange part 26 and the support part 28, the fitting hole 32a of the rotor magnet 32 which consists of cyclic | annular permanent magnets is fitted. Thus, the rotor magnet 32 is configured to be prevented from falling off by the enlarged support portion 28.

  Further, as shown in FIG. 1, the centrifugal pump 10 of the present invention is provided with a metal main body case 34 that accommodates the rotary vane members 12. The main body case 34 includes an upper main body case 36, and the upper main body case 36 includes a top wall 38 and a side peripheral wall 40 extending downward from the outer periphery of the top wall 38.

  And as shown to FIG. 1, FIG. 2, the flange 44 in which the opening part 40a for fixing the metal suction side coupling member 42 was formed in the side peripheral wall 40 of the upper side main body case 36 is formed There is. As shown in FIG. 1, the suction side joint member (suction side conduit) 42 is sealingly fixed to the flange 44 by, for example, welding, brazing, welding or the like. Thus, the suction side coupling member 42 is configured to communicate with the inside of the main body case 34.

  Further, as shown in FIGS. 1 and 2, the discharge side joint member made of metal is disposed on the side peripheral wall 40 of the upper main body case 36 so as to face the opening 40a for fixing the suction side joint member 42. A flange 50 having an opening 40 b for fixing the (discharge side conduit) 46 is formed.

  In this case, the positions of the flange 44 and the flange 50 are not limited, and can be arranged with the central angle shifted (for example, shifted the central angle by 45 degrees), and the shifted angle is particularly limited. It is possible to change the design according to the application etc.

  As shown in FIGS. 1 and 2, the discharge side joint member 46 is fixed to the flange 50 in a sealed state by, for example, welding, brazing, welding or the like. Thus, the discharge side coupling member 46 is in communication with the inside of the main body case 34.

  Further, as shown in FIG. 1 and FIG. 2, the main body case 34 is provided with a lower main body case (rotor case) 48. The outer peripheral flange 52 of the lower main body case 48 is fixed to the inner wall of the lower end 51 of the side peripheral wall 40 of the upper main body case 36 in a sealed state by, for example, welding, brazing, welding. Thus, as shown in FIG. 9A, an internal space S1 surrounded by the upper main body case 36 and the lower main body case 48 is formed in the main body case 34.

  The lower main body case 48 is, as shown in FIG. 1, a blade accommodating portion 54 extending substantially horizontally to the inner peripheral side from the outer peripheral flange 52 of the lower main body case 48 and a lower portion from the blade accommodating portion 54. And an extended rotor magnet housing portion 56. Furthermore, a bottomed cylindrical lower bearing member accommodating portion 58 is formed below the rotor magnet accommodating portion 56.

  The lower bearing member 60 is fitted into the lower bearing member accommodation portion 58 by, for example, press fitting. A lower end portion 66 of the shaft member 64 is fixed to the shaft hole 62 formed in the lower bearing member 60 so as to be axially supported via a thrust washer 61, for example, by press-fitting.

  Further, a shaft member 64 is inserted into the bearing portion 14 of the rotary vane member 12 so that the rotary vane member 12 can rotate.

  Furthermore, as shown to FIG. 1, FIG. 2 (A), in order to partition the inside of a main body case 34, the blade case 68 which comprises the division case joined to the main body case 34 is provided. In the blade case 68, on the suction side joint member 42 side, the outer peripheral flange 70 of the blade case 68 is located below the flange 44 of the side peripheral wall 40 of the upper main body case 36, for example, by welding, brazing or welding. It is fixed in a sealed state.

  Further, the outer peripheral flange 70 of the blade case 68 is provided with a fixing portion 70a for fixing below the flange 44 of the side peripheral wall 40 of the upper main body case 36, and extending from the fixing portion 70a so as to be bent upward in the vertical direction. The contact portion 70b is provided.

  The contact portion 70b is for defining the insertion position of the suction side joint member 42 with respect to the opening 40a for joining the suction side joint member 42 of the side peripheral wall 40 of the upper main body case 36 of the main body case 34. It functions as a stopper.

  The contact portion 70 b is extended to a position where it abuts on a tip 42 a of the suction side joint member 42 on the main body case 34 side. Further, in this case, the contact portion 70 b is not extended to the inner diameter portion of the suction side joint member 42 so that the inflow of fluid from the suction side joint member 42 is not impeded.

  Thus, the tip end 42a of the suction side joint member 42 on the main body case 34 side abuts on the contact portion 70b of the outer peripheral flange 70 of the blade case 68, and the suction side joint side of the side peripheral wall 40 of the upper main body case 36 The insertion position of the suction side joint member 42 into the opening 40 a is defined.

Therefore, the insertion margin of the suction side joint member 42 to the opening 40a on the suction side joint side of the side peripheral wall 40 of the upper main body case 36 does not run short, for example, the wrap amount of the brazing material does not decrease , and the joint area There is no decrease . As a result, the strength of the adhesion of the suction side joint member 42 to the flange 44 is not insufficient and the air tightness does not occur.

Also, with this configuration, the suction side joint member 42 is not inserted too much into the opening 40a on the suction side joint side of the side peripheral wall 40 of the upper main body case 36, and the distance between the suction side joint member 42 and the side peripheral wall 72 of the blade case 68 is It does not become small, and the inflow of the fluid from the suction side joint member 42 is not inhibited as described later.

  On the other hand, in the blade case 68, an opening 72a is formed in the side peripheral wall 72 of the blade case 68 on the discharge side joint member 46 side, and the periphery of the opening 72a of the side peripheral wall 72 is the side peripheral wall 40 of the upper main body case 36. And the discharge side joint member 46, for example, by welding, brazing, welding, etc., in a sealed state.

  In this case, as shown in FIG. 2B, on the side of the discharge side joint member 46, the contact portion 72b is extended from the opening 72a of the side peripheral wall 72 of the blade case 68 so that the inner diameter becomes smaller. May be provided. In addition, for convenience of explanation, in FIG. 1, the one not provided with such a contact portion 72b is illustrated.

  The contact portion 72 b is for defining the insertion position of the discharge side joint member 46 with respect to the opening 40 b for joining the discharge side joint member 46 of the side peripheral wall 40 of the upper main body case 36 of the main body case 34. It functions as a stopper.

  The contact portion 72 b is extended to a position where it abuts on a tip 46 a on the main body case 34 side of the discharge side joint member 46. Further, in this case, the abutting portion 72 b is not extended to the inner diameter portion of the discharge side joint member 46, and is configured so as not to inhibit the inflow of the fluid to the discharge side joint member 46.

  As a result, the end 46 a of the discharge side joint member 46 on the main body case 34 side abuts on the contact portion 72 b of the opening 72 a of the side peripheral wall 72 of the blade case 68, and the discharge of the side peripheral wall 40 of the upper main body case 36 The insertion position of the discharge side joint member 46 into the opening 40b on the side joint side is defined.

Therefore, the insertion margin of the suction side joint member 42 to the opening 72a on the discharge side joint side of the side peripheral wall 40 of the upper main body case 36 does not run short, for example, the amount of wrap around of brazing material does not decrease , and the joint area There is no decrease . As a result, the strength of the adhesion of the discharge side joint member 46 to the flange 50 is not insufficient, and the air tightness does not occur.

Further, with this configuration, the discharge side joint member 46 is not inserted too much into the opening 40b on the discharge side joint side of the side peripheral wall 40 of the upper main body case 36, and the discharge side joint member 46 that protrudes to the main body case 34 side. The protrusion 46b does not impede the inflow of the fluid into the discharge side coupling member 46 as described later, and the flow rate does not decrease.

  In addition, the number of these contact parts 70b and the contact parts 72b, and an arrangement position are not specifically limited. For example, each may be one. Further, they may be formed over the entire circumference in the circumferential direction of the suction side joint member 42 and the discharge side joint member 46, respectively. In addition, the plurality of contact portions 70b and the contact portions 72b may be formed to be spaced apart by a constant distance in the circumferential direction.

  Further, the blade case 68 has a side peripheral wall 72 extending upward from the outer peripheral flange 70 and an extension portion 74 extending horizontally inward along the outer blade portion 22 of the impeller member 16 from the side peripheral wall 72. Is equipped.

  With such a shape, the impeller member 16 can be accommodated between the blade case 68 and the blade accommodating portion 54 of the lower main body case 48.

  The upper bearing member 78 is fixed to the protruding portion 38 a protruding downward from the central portion of the top wall 38 of the upper main body case 36 by the fixed holder 71, and the inner peripheral opening 74 a of the extending portion 74 of the blade case 68. It is fixed to project downward inward.

  Thereby, the upper bearing member 78 is stably supported by the projecting portion 38a of the top wall 38 of the upper main body case 36, and eccentricity and vibration due to the rotation of the rotary vane member 12 can be prevented.

  The upper end portion 82 of the shaft member 64 inserted into the bearing portion 14 of the rotary blade member 12 is inserted into the shaft hole 80 formed in the upper bearing member 78 by, for example, a press fit, via the thrust washer 73. It is fixed to be supported.

  In addition, as shown in FIGS. 1 and 2, the diameter of the side peripheral wall 72 of the blade case 68 is smaller than the diameter of the side peripheral wall 40 of the upper main body case 36. The height is smaller than the height of the side peripheral wall 40 of the upper main body case 36.

  Thus, as shown in FIG. 9B, the inner case S1 formed by the upper main body case 36 and the lower main body case 48 is partitioned by the blade case 68, and the fluid introduction flow path 84 is formed upward. While being formed, rotary part accommodation space S2 which accommodates rotary vane member 12 below is formed.

  Thereby, as shown by arrow A in FIG. 1, the fluid sucked from the suction side joint member 42 extends from the fluid introduction channel 84 formed by the blade case 68 and the upper main body case 36 to the blade case 68. It passes through the inner peripheral opening 74 a of the setting portion 74. Then, the fluid that has passed through the inner opening portion 74 a is introduced into the rotation portion accommodation space S <b> 2 formed by the blade case 68 and the lower main body case 48.

  Further, as shown in FIG. 1, a metal main case side fixing bracket 96, which constitutes a detachment means, is formed on the outer periphery of the rotor magnet housing portion 56 of the lower main body case 48, for example, by welding, brazing, welding, It is fixed by press fitting etc.

  As shown in FIG. 1, the main body case side fixing bracket 96 is formed with a locking portion 98 so as to be bent and protruded to the inner peripheral side.

  Further, as shown in FIG. 1, the centrifugal pump 10 of the present invention is disposed on the outer periphery of the rotor magnet housing portion 56 of the lower main body case 48 so as to be located around the rotor magnet 32. And a coil unit 104 for rotating the motor. Although not shown, the coil unit 104 is separated at a constant interval in the circumferential direction, although not shown, on the electronic substrate 112 for performing electronic control, the plurality of coils 110 configured by the windings 108 wound around the bobbin case 106 Provided.

  And these coils 110 are fitted in the coil mounting part 114a formed in the inside of the substantially cylindrical coil cover main body 114, And the coil 110 is a lid-shaped coil cover with the electronic board 112. The coil cover main body 114 is fixed by 111.

  Further, as shown in FIG. 1, at the central portion of the coil portion 104, there is a housing opening 118 for housing the rotor magnet housing portion 56 and the lower bearing member housing portion 58 of the lower main body case 48. It is formed.

  Further, at the central portion of the electronic substrate 112, a housing opening 112a for housing the lower bearing member housing portion 58 of the rotor magnet housing portion 56 of the lower main body case 48 is formed.

  On the other hand, an opening 114b is formed at the central portion of the coil cover main body 114, and the rotor magnet accommodating portion 56 and the lower bearing member accommodating portion 58 of the lower main body case 48 are formed via the opening 114b. The housing opening 118 of the coil portion 104 and the housing opening 112 a of the electronic substrate 112 are housed.

  Furthermore, as shown in FIG. 1, the coil cover main body 114 is provided with a coil side fixing projection 116 that constitutes the detachment means. As shown in FIG. 1, the coil side fixing protrusion 116 is formed with a locking piece 124 that protrudes upward and protrudes outward from the opening 114 b of the coil cover main body 114.

  Thereby, the coil cover 104 is closed by the coil cover 111 housing the coil portion 104 by engaging the locking portion 98 of the main case side fixing bracket 96 and the locking piece 124 of the coil side fixing protrusion portion 116. The coil cover main body 114 is configured to be detachably attachable to the lower side of the main body case 34.

  In FIG. 1, reference numeral 126 denotes a connector, 128 denotes a lead wire, and 130 denotes a magnetic pole sensor for detecting the rotational direction and rotational position of the rotor magnet 32.

  As described above, according to the centrifugal pump 10 of the present invention, the coil cover main body 114 housing the coil portion 104 and closed by the coil cover 111 and the main body case 34 can be freely detached by the detaching means. In the case of this embodiment, it is configured to be detachable by the engagement of the locking portion 98 of the main case side fixing bracket 96 and the locking piece 124 of the coil side fixing protrusion 116.

  Therefore, before fixing the coil cover main body 114 which accommodates the coil portion 104 and is closed by the coil cover 111 to the main body case 34, for example, adheres to the main body case 34 by heating such as welding, brazing, welding, Processing requiring heating can be performed, and the workability is improved.

  Also, since the coil cover main body 114 housing the coil portion 104 and closed by the coil cover 111 and the main body case 34 are detachably fixed by the detaching means, replacement when the coil portion 104 breaks down You can do it easily. Further, the wire drawing direction and the joint direction (the suction side joint member 42 and the discharge side joint member 46) can be arbitrarily selected.

  However, such a detachment means is not limited in any way, and for example, other detachment means such as screw engagement, engagement due to unevenness and the like can be adopted.

  Furthermore, since the shaft member 64 of the rotary vane member 12 is pivotally supported by the upper bearing member 78 and the lower bearing member 60, the bearing of the rotary vane member 12 has a stable structure, durability, and noise reduction. Can provide an excellent centrifugal pump 10.

  That is, the rotation of the rotary blade member 12 is stabilized, the noise at the time of rotation is reduced, and the vibration of the rotary blade member 12 is reduced, thereby improving the durability.

  Further, since the shaft member 64 of the rotary blade member 12 is fixed to the upper bearing member 78 and the lower bearing member 60, and the rotary blade member 12 rotates the outer periphery of the shaft member 64, the rotary blade member 12 and the shaft member 64 The rotational sliding area increases between the outer circumference and the outer circumference, and the contact pressure also decreases.

  Thereby, the rotation of the rotary blade member 12 is stabilized, the noise at the time of rotation is reduced, and the vibration of the rotary blade member 12 is reduced, thereby improving the durability.

  In this case, the rotating portion between the rotary blade member 12 and the shaft member 64, that is, at least the inner periphery of the bearing portion 14 of the rotary blade member 12 and the outer periphery of the shaft member 64 are made of synthetic resin having good slidability. It is desirable to be done.

  Therefore, the bearing portion 14 of the rotary blade member 12 and the shaft member 64 itself are made of highly slidable synthetic resin, and only the inner periphery of the bearing portion 14 of the rotary blade member 12 and the outer surface of the shaft member 64 Can be coated with such a slidable synthetic resin.

  In this case, the synthetic resin having good slidability is not particularly limited, and for example, a resin having excellent chemical resistance such as PPS and PTFE can be used.

  As described above, by using a highly slidable synthetic resin for the rotating portion, the sliding property is excellent even under non-lubrication conditions in which the bearing is in the fluid, and the shaft member 64 and the rotation by the rotation of the rotary vane member 12 The blade member 12 is not worn and damaged, durability is improved, and the rotary blade member 12 is not rattling or eccentricity, and it is possible to maintain the desired target pump performance.

  In this case, although not shown, the shaft member 64 is fixed to the rotary blade member 12, and the rotary blade member is disposed between the upper bearing member 78 and the shaft member 64 and between the lower bearing member 60 and the shaft member 64. It is also possible to configure 12 to rotate.

  With this configuration, the rotation of the rotary vane member 12 is stabilized, the noise at the time of rotation is reduced, and the vibration of the rotary vane member 12 is reduced, thereby improving the durability.

  Furthermore, also in this case, similarly, the rotation parts between the upper bearing member 78 and the shaft member 64 and between the lower bearing member 60 and the shaft member 64 are made of a synthetic resin having good slidability. can do.

  The centrifugal pump 10 of the present invention thus configured is operated as follows.

  First, the coil 110 is excited by supplying an electric current to the coil 110 of the coil portion 104, thereby acting on the rotor magnet 32 of the rotating blade member 12, and the shaft in which the rotating blade member 12 is inserted into the bearing portion 14. It can be rotated around the member 64.

  Thereby, the impeller member 16 of the rotary blade member 12 is rotated, and the fluid sucked from the suction side joint member 42 is formed by the blade case 68 and the upper main body case 36 as shown by the arrow A in FIG. From the fluid introduction flow passage 84, the opening portion 74a of the extension portion 74 of the blade case 68 is passed.

  Then, the fluid that has passed through the inner opening portion 74a is introduced into the rotation portion accommodation space S2 formed by the blade case 68 and the lower main body case 48.

  Further, the fluid introduced into the rotary portion accommodation space S2 by the rotational force of the impeller member 16 of the rotary vane member 12 is from the rotary portion accommodation space S2 of the main body case 34, as shown by the arrow B in FIG. Discharge is performed via the discharge side joint member 46.

  According to the centrifugal pump 10 of the present invention configured as described above, the main body case 34 includes the upper main body case 36 and the lower main body case (rotor case) 48 fixed to the upper main body case 36. The main body case 48 is shaped so as to include a blade accommodating portion 54 horizontally extending inward from the outer periphery of the lower main body case 48 and a rotor magnet accommodating portion 56 extending downward from the blade accommodating portion 54. .

  Therefore, the impeller member 16 and the impeller member 16 are provided below the internal space S1 formed between the upper main body case 36 and the lower main body case 48 fixed to the upper main body case 36. The rotary blade member 12 composed of the rotor magnet 32 can be accommodated compactly.

  Moreover, since the coil portion 104 is disposed so as to be positioned around the rotor magnet 32 and rotates the rotary vane member 12, the coil portion 104 disposed so as to be positioned around the rotor magnet 32 is generated. The magnetic path generated by the above acts on the rotor magnet 32 provided below the impeller member 16 via the rotor magnet accommodating portion 56 of the lower main body case 48.

  By this, it becomes possible to rotate the rotary blade member 12 stably. Therefore, it is possible to provide a centrifugal pump having excellent pump performance without causing operating loss of the drive motor (the coil portion 104 and the rotor magnet 32).

  Further, the upper main body case 36 and the lower main body case 48 constituting the metal main body case 34 can be fixed by heating such as welding, brazing and welding, for example, and can be fixed in a sealed state.

  That is, the connection portion has a structure capable of a high airtightness and holding strength such as welding and brazing.

  Therefore, since fixation by heating, such as welding, brazing, and welding can be performed, for example, a refrigerant, a flammable fluid, a fluid having toxicity, etc. are circulated in a closed circuit, and centrifugally required for pressure resistance, airtightness, and corrosion resistance. A pump can be provided.

In addition, the joint between metal main body case 34 (either upper main body case 36 or lower main body case 48 or both) and blade case 68 is fixed by heating, such as welding, brazing, welding, etc. Can be fixed and sealed.

  In addition, the joint portion between the metal suction side joint member 42 and the main body case 34 and the joint portion between the discharge side joint member 46 and the main body case 34 can be fixed by heating such as welding, brazing or welding, for example. , Can be secured in a sealed manner.

  That is, the connection portion has a structure capable of a high airtightness and holding strength such as welding and brazing.

  Therefore, since heat fixation such as welding, brazing, and welding can be performed, a highly airtight metal case and piping can be used. For example, a refrigerant, a flammable fluid, a fluid having toxicity, etc. are circulated in a closed circuit, It is possible to provide a centrifugal pump that requires pressure resistance, air tightness, and corrosion resistance.

  Further, the internal space S1 formed by the upper main body case 36 and the lower main body case 48 is partitioned to form the fluid introduction flow path 84 at the upper side, and the rotary portion accommodation space S2 for accommodating the rotary vane member 12 at the lower side. Since the blade case 68 is formed, the fluid path can be easily formed.

In this case, it is desirable that the main body case 34 be formed of a metal press-formed product, and the suction side joint member 42 and the discharge side joint member 46 be formed of a metal pipe. As a result, a joining method with high airtightness and holding strength such as welding or brazing can be performed at these connection parts, and the cost can be reduced.
(Example 2)

  FIG. 3 is a partially enlarged sectional view similar to FIG. 2 showing another embodiment in which the joint structure of the joint member of the present invention is applied to a centrifugal pump.

  The centrifugal pump 10 of this embodiment basically has the same configuration as that shown in FIGS. 1 and 2, and the same reference numerals are given to the same components and the detailed description thereof is omitted. .

  In the centrifugal pump 10 of this embodiment, as shown in FIG. 3, an opening for fixing the metal suction side joint member 42 to the side peripheral wall 40 of the upper main body case 36 on the suction side joint member 42 side. A part of the portion 40a includes a bent portion 40c bent inward in the radial direction, and an abutting portion 40d extended upward in the vertical direction from the bent portion 40c.

  The contact portion 40d is used to define the insertion position of the suction side joint member 42 with respect to the opening 40a for joining the suction side joint member 42 of the side peripheral wall 40 of the upper main body case 36 of the main body case 34. It functions as a stopper.

  The contact portion 40 d is extended to a position where it abuts on a tip 42 a of the suction side joint member 42 on the main body case 34 side. Further, in this case, the contact portion 40d is not extended to the inner diameter portion of the suction side joint member 42, and is configured such that the inflow of fluid from the suction side joint member 42 is not impeded.

  Thus, the tip end 42a of the suction side joint member 42 on the main body case 34 side abuts on the contact portion 40d of the side peripheral wall 40 of the upper side main body case 36, and the side peripheral wall of the upper side main body case 36 of the suction side joint member 42 The position of insertion into the opening 40a on the suction side joint side of 40 is defined.

Therefore, the insertion margin of the suction side joint member 42 to the opening 40a on the suction side joint side of the side peripheral wall 40 of the upper main body case 36 does not run short, for example, the wrap amount of the brazing material does not decrease , and the joint area There is no decrease . As a result, the strength of the adhesion of the suction side joint member 42 to the flange 44 is not insufficient and the air tightness does not occur.

Also, with this configuration, the suction side joint member 42 is not inserted too much into the opening 40a on the suction side joint side of the side peripheral wall 40 of the upper main body case 36, and the distance between the suction side joint member 42 and the side peripheral wall 72 of the blade case 68 is It does not become small , and the inflow of the fluid from the suction side coupling member 42 will not be inhibited.
(Example 3)

  FIG. 4 is a partially enlarged sectional view similar to FIG. 2 showing another embodiment in which the joint structure of the joint member of the present invention is applied to a centrifugal pump.

  The centrifugal pump 10 of this embodiment basically has the same configuration as that shown in FIGS. 1 and 2, and the same reference numerals are given to the same components and the detailed description thereof is omitted. .

  In the centrifugal pump 10 of this embodiment, as shown in FIG. 4, a claw member extending inward in the radial direction to a part of the opening 72a of the side peripheral wall 72 of the blade case 68 on the discharge side joint member 46 side. A shaped claw member 75 is formed.

  That is, the claw member 75 includes a bent portion 75a bent inward in the radial direction from the opening 72a of the side peripheral wall 72 of the blade case 68, and an abutting portion 75b extended upward in the vertical direction from the bent portion 75a. It is done.

The abutment portion 75b, to the opening 40b for joining the discharge side joint member 46 of the side wall 40 of the upper body case 36 of the main body case 34, for defining the insertion position of the discharge-side coupling member 46 It functions as a stopper.

  The contact portion 75 b is extended to a position where the contact portion 75 b contacts the end 46 a of the discharge side joint member 46 on the main body case 34 side. Further, in this case, the contact portion 75 b is not extended to the inner diameter portion of the discharge side joint member 46 so that the inflow of the fluid to the discharge side joint member 46 is not impeded.

  As a result, the end 46 a of the discharge side joint member 46 on the main body case 34 side abuts on the contact portion 75 b of the opening 72 a of the side peripheral wall 72 of the blade case 68, and the upper main body case 36 of the discharge side joint member 46. The insertion position of the side peripheral wall 40 to the opening 40b on the discharge side joint side is defined.

Therefore, the insertion margin of the suction side joint member 42 to the opening 40b on the discharge side joint side of the side peripheral wall 40 of the upper main body case 36 does not run short, for example, the amount of wrap around of brazing material does not decrease , and the joint area There is no decrease . As a result, the strength of the adhesion of the discharge side joint member 46 to the flange 50 is not insufficient, and the air tightness does not occur.

Further, with this configuration, the discharge side joint member 46 is not inserted too much into the opening 40b on the discharge side joint side of the side peripheral wall 40 of the upper main body case 36, and the discharge side joint member 46 that protrudes to the main body case 34 side. The projection 46b does not impede the inflow of fluid into the discharge joint member 46, and the flow rate does not decrease.

The number and arrangement position of the claw members 75 (contact portions 75b) are not particularly limited. For example, one may be sufficient. Further, it may be formed over the entire circumferential direction of the opening 72 a of the side peripheral wall 72 of the blade case 68. In addition, the plurality of claw members 75 (contact portions 75b) may be formed spaced apart by a constant distance in the circumferential direction of the opening 72a.
(Example 4)

  FIG. 5 is a partially enlarged sectional view similar to FIG. 2 showing another embodiment in which the joint structure of the joint member of the present invention is applied to a centrifugal pump.

  The centrifugal pump 10 of this embodiment basically has the same configuration as that shown in FIGS. 1 and 2, and the same reference numerals are given to the same components and the detailed description thereof is omitted. .

  In the centrifugal pump 10 of this embodiment, as shown in FIG. 5A, on the suction side joint member 42 side, the outer diameter of the suction side joint member 42 is set to the side peripheral wall 40 of the upper main body case 36 of the main body case 34. The enlarged diameter part 42b formed larger than the internal diameter of the opening part 40a for joining the suction side coupling member 42 is provided.

  The enlarged diameter portion 42b includes a tapered inclined surface 42c which is inclined radially outward, and an enlarged diameter portion main body 42d which constitutes a joint main body configured to have a constant outer diameter and an inner diameter.

  The enlarged diameter portion 42b is for defining the insertion position of the suction side joint member 42 with respect to the opening 40a for joining the suction side joint member 42 of the side peripheral wall 40 of the upper main body case 36 of the main body case 34. It functions as a stopper.

  Thus, the tapered inclined surface 42c of the enlarged diameter portion 42b of the suction side joint member 42 abuts on the opening 40a on the suction side joint side of the side peripheral wall 40 of the upper main body case 36, and the upper main body of the suction side joint member 42 An insertion position of the side peripheral wall 40 of the case 36 into the opening 40 a on the suction side joint side is defined.

Therefore, the insertion margin of the suction side joint member 42 to the opening 40a on the suction side joint side of the side peripheral wall 40 of the upper main body case 36 does not run short, for example, the wrap amount of the brazing material does not decrease , and the joint area There is no decrease . As a result, the strength of the adhesion of the suction side joint member 42 to the flange 44 is not insufficient and the air tightness does not occur.

Also, with this configuration, the suction side joint member 42 is not inserted too much into the opening 40a on the suction side joint side of the side peripheral wall 40 of the upper main body case 36, and the distance between the suction side joint member 42 and the side peripheral wall 72 of the blade case 68 is It does not become small, and the inflow of the fluid from the suction side joint member 42 is not inhibited as described later.

  Further, in the centrifugal pump 10 of this embodiment, as shown in FIG. 5B, on the discharge side joint member 46 side, the outer diameter of the discharge side joint member 46 is set to the side of the upper body case 36 of the body case 34. An enlarged diameter portion 46c is formed larger than the inner diameter of the opening 40b for joining the discharge side joint member 46 of the peripheral wall 40.

  The enlarged diameter portion 46c includes a tapered inclined surface 46d which is inclined radially outward, and an enlarged diameter portion main body 46e which constitutes a joint main body configured to have a constant outer diameter and an inner diameter.

  The enlarged diameter portion 46 c is used to define the insertion position of the discharge side joint member 46 with respect to the opening 40 b for joining the discharge side joint member 46 of the side peripheral wall 40 of the upper main body case 36 of the main body case 34. It functions as a stopper.

  Thereby, the tapered inclined surface 46 d of the enlarged diameter portion 46 c of the discharge side joint member 46 abuts the opening 40 b on the discharge side joint side of the side peripheral wall 40 of the upper main body case 36, and the side peripheral wall 40 of the upper main body case 36. The insertion position of the discharge side joint member 46 into the opening 40b on the discharge side joint side is defined.

Therefore, no insufficient insertion position to the discharge side joint side of the opening 40b of the side wall 40 of the upper body case 36 on the discharge side joint member 46, for example, less wraparound amount of such brazing material Narazu, the junction area There is no decrease . As a result, the strength of the fixation of the discharge side joint member 46 to the flange 44 does not occur insufficiently, and the air tightness does not occur.

Further, with this configuration, the discharge side joint member 46 is not inserted too much into the opening 40b on the discharge side joint side of the side peripheral wall 40 of the upper main body case 36, and the discharge side joint member 46 that protrudes to the main body case 34 side. The projection 46b does not impede the inflow of fluid into the discharge joint member 46, and the flow rate does not decrease.

  FIG. 6 is a partially enlarged cross-sectional view similar to FIG. 2 showing another embodiment in which the joint structure of the joint member of the present invention is applied to a centrifugal pump.

  The centrifugal pump 10 of this embodiment basically has the same configuration as that shown in FIGS. 1 and 2, and the same reference numerals are given to the same components and the detailed description thereof is omitted. .

  In the centrifugal pump 10 of this embodiment, as shown in FIG. 6 (A), the side peripheral wall of the suction side joint member 42 on the side of the suction side joint member 42 is the side peripheral wall 40 of the upper main body case 36 of the main body case 34. The projection part 42e formed larger than the internal diameter of the opening part 40a for joining the suction side coupling member 42 is provided.

  The protrusion 42 e is a stopper for defining the insertion position of the suction side joint member 42 with respect to the opening 40 a for joining the suction side joint member 42 of the side peripheral wall 40 of the upper main body case 36 of the main body case 34. Act as.

  Thereby, the projection 42 e of the suction side joint member 42 abuts on the opening 40 a on the suction side joint side of the side peripheral wall 40 of the upper main body case 36, and the side peripheral wall 40 of the upper main body case 36 of the suction side joint member 42. The insertion position to opening part 40a by the side of the suction side of joint is specified.

Therefore, the insertion margin of the suction side joint member 42 to the opening 40a on the suction side joint side of the side peripheral wall 40 of the upper main body case 36 does not run short, for example, the wrap amount of the brazing material does not decrease , and the joint area There is no decrease . As a result, the strength of the adhesion of the suction side joint member 42 to the flange 44 is not insufficient and the air tightness does not occur.

Also, with this configuration, the suction side joint member 42 is not inserted too much into the opening 40a on the suction side joint side of the side peripheral wall 40 of the upper main body case 36, and the distance between the suction side joint member 42 and the side peripheral wall 72 of the blade case 68 is It does not become small , and the inflow of the fluid from the suction side coupling member 42 will not be inhibited.

  Further, in the centrifugal pump 10 of this embodiment, as shown in FIG. 6B, on the discharge side joint member 46 side, the side peripheral wall of the discharge side joint member 46 is on the side of the upper main body case 36 of the main body case 34. The projection 46 f is formed to be larger than the inner diameter of the opening 40 b for joining the discharge side joint member 46 of the peripheral wall 40.

  The projecting portion 46 f is a stopper for defining the insertion position of the discharge side joint member 46 with respect to the opening 40 b for joining the discharge side joint member 46 of the side peripheral wall 40 of the upper main body case 36 of the main body case 34. Act as.

  As a result, the protrusion 46 f of the discharge side joint member 46 abuts on the discharge side joint side opening 40 b of the side peripheral wall 40 of the upper main body case 36, and the side peripheral wall 40 of the upper main body case 36 of the discharge side joint member 46. The insertion position to the opening 72a on the discharge side joint side is defined.

Therefore, the insertion margin of the discharge side joint member 46 to the opening 40b on the discharge side joint side of the side peripheral wall 40 of the upper main body case 36 is not made , for example, the amount of wraparound of brazing material does not decrease , and the joint area decreases. There is nothing to do. As a result, the strength of the fixation of the discharge side joint member 46 to the flange 44 does not occur insufficiently, and the air tightness does not occur.

Further, this configuration without appear too inserts a discharge side joint member 46 to the discharge side joint side of the opening 40b of the side wall 40 of the upper body case 36, the discharge side joint member 46 which projects into the body case 34 side The protruding portion 46b of the second embodiment does not impede the inflow of the fluid into the discharge side coupling member 46, and the flow rate does not decrease.

  In this case, the number of the protrusions 42e and the number of the protrusions 46f and the arrangement position thereof are not particularly limited, and one may be partially formed on the side peripheral wall of the suction side joint member 42 and the discharge side joint member 46 . Moreover, you may form annularly in the side peripheral wall of the suction side coupling member 42 and the discharge side coupling member 46, respectively. Furthermore, the side circumferential walls of the suction side joint member 42 and the discharge side joint member 46 may be annularly spaced apart from each other.

  In the present invention, the “main body side” on which the stopper is formed means both or one of the upper main body case 36 and the blade case 68 side.

  Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto. For example, in the above embodiment, the coil portion 104 is accommodated in the coil cover main body 114 and closed by the coil cover 111. However, the coil portion 104 is molded with a mold resin and can be removed below the main body case 34. It can also be attached to

  In the above embodiment, the joint structure of the present invention is applied to a centrifugal pump. However, the present invention is not limited to a centrifugal pump, and a pump having a joint structure of joint members, a control valve, etc. Applicable

  Furthermore, although the number of the suction side joint member 42 and the discharge side joint member 46 is one in the above embodiment, it is also possible to provide a plurality of the suction side joint member 42 and the discharge side joint member 46. Various modifications are possible without departing from the object of the present invention.

  The present invention can be applied to a joint structure of joint members joining joint members to an opening of a main body case, a joint method of joint members, and a centrifugal pump using the same.

  The present invention relates to, for example, a centrifugal pump for circulating fluid in a closed circuit, such as a refrigerant used in a refrigerant circulation circuit such as an air conditioner or a refrigerator, or a cooling water used in a cooling circulation circuit such as heat generating parts or devices. It can apply. And this centrifugal pump is a centrifugal pump for which pressure resistance and airtightness are required.

10 centrifugal pump 12 rotary blade member 14 bearing portion 16 impeller member 18 base end portion 20 enlarged diameter portion 22 outer blade portion 24 rotor magnet housing portion 26 flange portion 28 support portion 30 mounting portion 32 rotor magnet 32a fitting hole 34 body case 36 upper body case 38 top wall 38a projecting portion 40 side peripheral wall 40a opening 40b opening 40c bent portion 40d contacting portion 42 suction side joint member 42a tip 42b enlarged diameter portion 42c tapered inclined surface 42d enlarged diameter portion main body 42e protruding portion 44 flange 46 discharge side joint member 46a tip 46b protruding portion 46c enlarged diameter portion 46d tapered inclined surface 46e enlarged diameter portion main body 46f protruding portion 48 lower main body case 50 flange 51 lower end 52 outer peripheral flange 54 blade accommodating portion 56 rotor magnet accommodating portion 58 Lower bearing member accommodating portion 60 Lower bearing member 61 Washer 62 shaft hole 64 shaft member 66 lower end 68 blade case 70 outer peripheral flange 70a fixed part 70b contact part 71 fixed holder 72 side peripheral wall 72a opening 72b contact part 73 thrust washer 74 extension part 74a inner peripheral opening 75 claw member 75a bent portion 75b contact portion 78 upper bearing member 80 shaft hole 82 upper end 84 fluid introduction flow passage 96 main case side fixing bracket 98 locking portion 104 coil portion 106 bobbin case 108 winding 110 coil 111 coil cover 112 Electronic substrate 112a Housing opening 114 Coil cover main body 114a Coil mounting part 114b Opening 116 Coil side fixed projection 118 Housing opening 124 Locking piece 126 Connector 128 Lead wire 130 Magnetic pole sensor 200 Centrifugal pump 202 Rotary blade member 204 Main body Case 206 upper side Body case 208 Top wall 210 Side peripheral wall 210a Opening 210b Opening 212 Suction side joint member 212a Tip 214 Flange 216 Lower body case 218 Lower end 220 Outer peripheral flange 222 Blade case 222a Opening 224 Outer peripheral flange 226 Fluid introduction channel 228 Side peripheral wall 230 Discharge side joint member 230a Protruding part 232 Flange A Arrow B Arrow C Arrow H Arrow Protrusion distance H2 Protrusion distance L Distance S1 Internal space S2 Rotating part accommodation space

Claims (5)

A joint structure of a joint member for joining a joint member to an opening of a main body case,
A stopper for defining an insertion position of the joint member;
The stopper is in contact with a tip end of the joint member on the side of the main body case, and the contact portion includes an abutting portion for defining an insertion position of the joint member with respect to the opening of the main body case.
The joint structure of joint members, wherein the contact portion is formed in a partition case joined to the main body case in order to partition the inside of the main body . A joint member joint method according to claim 1 , wherein the joint member is jointed to the opening of the main body case by the joint structure of the joint member according to claim 1 . A pump comprising the joint structure according to claim 1 . The pump according to claim 3 , wherein the pump is a centrifugal pump. A centrifugal pump,
A rotating blade member comprising an impeller member and a rotor magnet provided below the impeller member;
A metal body case for accommodating the rotating blade member;
A metal suction side joint member provided in communication with the main body case for introducing a fluid into the impeller;
A metal discharge side joint member provided in communication with the main body case in order to discharge fluid by rotation of the impeller;
And a coil portion arranged to be located around the rotor magnet and rotating a rotary blade member,
The body case is
Upper body case,
A lower main body case fixed to the upper main body case;
An inner space formed by the upper body case and the lower body case is partitioned to form a fluid introduction flow path in the upper side, and a blade case is formed in the lower side to form a rotary portion accommodation space for accommodating the rotary vane members. ,
A stopper for defining the insertion position of the joint member is formed on the main body side or the joint member side with respect to the opening of the main body case.
A centrifugal pump characterized in that a main body side on which the stopper is formed is an upper main body case and / or a blade case.

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