JP2009221987A - Bearing member and vertical pump device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device having a function for holding a lubricating material for a bearing, and to provide a vertical pump device having the same. <P>SOLUTION: This vertical pump device 1 is structured of a motor 10, a bearing member 20, which is connected to the motor 10 and which includes a cylindrical bearing case 21, a first joint 22 provided inside the bearing case 21, a plurality of bearings 23 holding the first joint 22, and a lid body 24 for fixing the bearings 23 to the bearing case 21 and which has seal members 25a and 25b respectively provided in the bearing case 21 and the lid body 24, and a joint member 40 connected to the bearing member 20, and a pump 50 connected to the joint member 40. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bearing member and a vertical pump device provided between a pump and a motor, and more particularly to a device capable of improving maintainability.

  Currently, various pumps are used for water supply (pumping) to buildings. As one of such pumps, a drive shaft is provided in the vertical direction and a plurality of impellers are provided (in multiple stages) as a pump that can pump water up to a high head even in a high building such as a building. A so-called vertical (vertical) pump device is known.

  Such a vertical pump device includes, for example, a pump unit in which a plurality of impellers are housed and a drive shaft that drives the impeller is communicated with the interior thereof, a motor provided on the top of the pump unit, and rotation of the motor And a shaft portion in which the shaft and the drive shaft of the pump portion are continuously connected by a shaft coupling.

  Such a vertical pump device having a plurality of impellers can pump water to a higher head as the number of impellers increases. However, if the number of impellers is increased in order to obtain a high-lift pump, the drive shaft needs to be long enough to fix the impeller, and the length becomes long. However, when the length of the drive shaft is increased, the length of the shaft portion is also increased, which increases the possibility of causing eccentric rotation or the like. Such eccentric rotation of the drive shaft causes a decrease in pump function such as a pumping function, vibration, noise, and failure.

  For this reason, a vertical pump device having a bearing member that prevents eccentric rotation by holding a joint of a shaft portion by one or a plurality of rotary bearings (hereinafter referred to as “bearings”) is known (for example, see Patent Document 1). ). Further, since the bearing needs to be supported in the axial direction (radial direction) when rotating, a ball bearing is mainly used. Such a bearing requires lubrication in order to reduce friction and wear inside the bearing and prevent seizure.

The lubrication method is performed by filling the bearing housing with a lubricant such as grease or oil. However, deterioration of the lubricant due to operation time, volatilization or scattering of the lubricant occurs. In particular, since the bearing is fixed by the bearing member, if the lubricant cannot be retained by the bearing member, the lubricant volatilizes and scatters from the gap between the bearing member and the shaft portion. If the holding function of the lubricant is poor, there is a possibility that the lubricant is depleted or the surroundings are soiled by the scattered lubricant. It is also necessary to replenish the depleted lubricant. In order to eliminate such replenishment of lubricant as much as possible, a sealed ball bearing sealed with grease is also used. In addition, there is known one that is lubricated with a liquefied gas as a working fluid instead of grease (see, for example, Patent Document 1).
JP 2003-201983 A

  The above-described bearing member and vertical pump device have the following problems. That is, when a ball bearing is used as the bearing of the joint, it is possible to receive a radial load (hereinafter referred to as “radial load”) of the shaft portion. However, when a plurality of impellers are provided, a load (hereinafter referred to as “thrust load”) is applied to the shaft portion in the thrust direction, which is the gravitational direction along the axial center direction, due to the pressure difference generated above and below the impeller. That is, since not only the radial load but also the thrust load is applied to the bearing, it is difficult to support the bearing with the ball bearing.

  However, when an angular contact ball bearing that can support a thrust load is used instead of a ball bearing, the angular contact ball bearing cannot seal the lubricant. Need to be replenished. For this reason, it is unavoidable to receive a thrust load at the pump part and use a ball bearing. However, when a thrust load is received at the pump section, there are fears that causes of pump performance deterioration, generation of vibration and noise, and factors such as friction and wear of each component.

  Further, when the bearing is lubricated with liquefied gas, it can be used only when the fluid used (liquid supplied by the pump device) is liquefied gas. However, when water is used as a working fluid, it is difficult to lubricate the bearing with water.

  SUMMARY OF THE INVENTION The present invention relates to a bearing member for connecting a rotating shaft of a motor and a driving shaft of a pump, and a vertical pump apparatus having the bearing member, and particularly to provide a bearing pump having a lubricant retaining function. .

  In order to solve the problems and achieve the object, the bearing member and the vertical pump device of the present invention are configured as follows.

  A joint that transmits rotational force, a joint case that covers at least the outer peripheral surface of the joint, or a part of the joint, and a load that is provided inside the joint case and holds loads in the thrust direction and the radial direction of the joint And a seal member provided at a position facing the joint between the joint and the joint case, and sandwiching the bearing in the axial direction of the joint. And.

  A motor having a rotating shaft whose axial direction is along the direction of gravity, a joint having one end connected to the rotating shaft and transmitting the rotational force of the rotating shaft, the joint, or a part of the joint A joint case that covers at least the outer peripheral surface side, a bearing that is provided inside the joint case, can hold a load in the thrust direction and the radial direction of the joint, and supports the joint, and the joint and the joint case And a seal member provided at a position facing each other across the bearing in the axial center direction of the joint, and a drive shaft connected to the other end of the joint and driven by rotation of the joint And a pump unit having a plurality of impellers connected to the drive shaft and rotating in accordance with the drive of the drive shaft.

  According to the present invention, even the bearing member and the vertical shaft pump provided between the rotating shaft of the motor and the drive shaft of the pump have a lubricant retaining function and hold the thrust load of the shaft portion. Is possible.

  FIG. 1 is a side view showing a partial cutout of a vertical pump device 1 according to an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view showing a configuration of a seal member 25b used in the vertical pump device 1. . In FIG. 1, B indicates a bolt and F indicates the flow of water.

  As shown in FIG. 1, the vertical pump device 1 includes a motor 10, a bearing member 20 connected to the motor 10, a joint member 40 connected to the bearing member 20, and a pump connected to the joint member 40. 50.

  The vertical pump device 1 is connected to the rotary shaft 11 provided in the motor 10, the first joint (joint) 22 provided on the bearing member 20 and connected to the rotary shaft 11, and the first joint 22. A second joint 41 provided on the joint member 40; and a drive shaft 51 provided on the pump 50 and connected to the second joint 41. That is, the vertical pump device 1 has the shaft portion 2 to which the rotating shaft 11, the first joint 22, the second joint 41, and the drive shaft 51 are integrally connected, and the shaft portion 2 is rotated by the rotation of the motor 10. It is formed to be rotatable.

  As the motor 10, for example, a DC motor that can be rotated by a direct current and is provided with a rotating shaft 11 having a key is used. Further, eye bolts 13 provided at two locations of the outer case 12 are attached to the motor 10 and can be lifted and lowered by a hoist crane or the like via a rope or the like. The outer case 12 of the motor 10 is provided with a plurality of heat exchange fins 14. The outer case 12 is formed with a bolt hole 15 in which a screw thread to which the bolt B can be screwed is formed.

  The bearing member 20 includes a cylindrical bearing case 21, a first joint 22 provided in the bearing case 21, and a plurality of (three in FIG. 1) bearings 23 that pivotally support the first joint 22. And a lid 24 for fixing the bearing 23 to the bearing case 21. The bearing member 20 includes seal members 25a and 25b provided on the bearing case 21 and the lid 24, respectively.

  The bearing case 21 has a cylindrical shape and projects radially inwardly on the lower side of the inner periphery thereof. That is, the inner diameter of the bearing case 21 is partially smaller than the inner diameter of the bearing case 21, and a seal member 25a is provided. A receiving portion 26 is provided. The bearing case 21 has a holding portion 27 that is above the seal receiving portion 26 and can hold a part of the outer peripheral side of the bearing 23. Further, the bearing case 21 includes a through hole 28 that is provided in a difference (thick portion) between the inner periphery and the outer periphery and through which the bolt B that connects the motor 10 and the joint member 40 passes.

  The first joint 22 is formed in a cylindrical body having a large-diameter portion 29 and a small-diameter portion 30 having two different outer diameters, and the large-diameter portion 29 is disposed on the motor 10 side and the small-diameter portion 30 is disposed on the pump 50 side. As shown in FIG.

  The first joint 22 is provided on the large diameter portion 29 side, and has a rotary shaft insertion hole 31 having a key groove formed so that the rotary shaft 11 can be inserted therein and fixed at least in the rotational direction. Yes. The first joint 22 is provided on the small-diameter portion 30 side, and is formed to have a smaller diameter than the small-diameter portion 30 that can transmit the rotation of the first joint 22 to a drive body (here, a second joint 41 and a drive shaft 51 described later). The transmission part 32 made.

  The large-diameter portion 29 has an outer diameter that is slightly smaller than the inner diameter of the lid body 24, and is substantially the same as the inner diameter of the seal member 25 b provided on the lid body 24. The large diameter portion 29 is formed so as to be able to contact a part of the inner peripheral portion of the bearing 23 by the lower surface of the large diameter portion 29. The difference between the outer diameter of the large diameter portion 29 and the inner diameter of the lid body 24 can be changed as appropriate depending on the seal member 25b used.

  The small diameter portion 30 is formed to have substantially the same diameter as the inner peripheral surface of the bearing 23 and the inner peripheral surface of the seal member 25 a, and is formed to be slightly smaller in diameter than the seal receiving portion 26. The small-diameter portion 30 is formed such that the length in the axial direction of the small-diameter portion 30 is longer than the distance obtained by combining the thickness of the plurality of bearings 23 and the thickness of the seal receiving portion 26. The difference between the outer diameter of the small-diameter portion 30 and the inner diameter of the seal receiving portion 26 can be appropriately changed depending on the seal member 25a used, and the length in the axial direction of the small-diameter portion 30 can be appropriately changed depending on each configuration. is there.

  As the bearing 23, for example, an angular ball bearing is used. In addition, even if it is not an angular ball bearing, if the load from the thrust direction and the radial direction from the 1st coupling 22 can be hold | maintained, another bearing may be sufficient. The bearing 23 is held in the direction of gravity by the holding portion 27 of the bearing case 21, and movement to the motor side, which is the direction opposite to the direction of gravity, is restricted by the lid 24.

  Further, when an angular ball bearing is used as the bearing 23, a plurality of balls are provided between the two cylindrical portions of the inner peripheral portion and the outer peripheral portion, and the inner peripheral portion is a small diameter of the first joint 22. The outer peripheral portion is fixed (or abutted) to the bearing case 21 and is fixed (or abutted) to the portion 33. Such an arrangement method can be appropriately set as long as it is an arrangement method adapted to the JIS standard, the standards of each bearing company, or the bearing 23, for example.

  When such a bearing 23 is disposed in the bearing case 21, the lubricant is applied to the sliding portion, in particular, the ball between the inner peripheral portion and the outer peripheral portion. As the lubricant, for example, highly viscous grease or the like is used.

  The lid body 24 is formed in an annular shape having different thicknesses by two different inner diameters. The lid 24 is formed so as to be able to restrict the movement of the bearing 23 to the motor side by an end face having a large inner diameter side (thickness side). Further, the lid body 24 has a seal receiving portion 33 on the smaller diameter side (thickness side).

  FIG. 2 is an enlarged view of the Y portion. As shown in FIG. 2, the seal members 25 a and 25 b are formed of a metal (metal) labyrinth seal having an inner diameter side seal 34 and an outer diameter side seal 35. ing. In FIG. 2, the seal member 25 b is shown because it is an enlargement of the Y portion. However, the seal member 25 a and the seal member 25 b are of the same shape and have different diameters depending on the attachment portion. Can be used. The metal material forming the seal members 25a and 25b may be any material that does not cause seizure or biting.

  The inner diameter side seal 34 and the outer diameter side seal 35 are each formed in a saw blade shape on the side surfaces that are assembled at opposing positions. In other words, the seal members 25a and 25b have a sealing property due to the saw-tooth side surfaces of the inner diameter side seal 34 and the outer diameter side seal 35, and the inner diameter side seal 34 and the outer diameter side seal 35 rotate separately. It is made possible. In addition, the seal members 25a and 25b are formed so that fluid (here, lubricant) can be prevented from moving to the outside through the gap between the inner diameter side seal 34 and the outer diameter side seal 35 as much as possible (sealable).

  In other words, the seal members 25a and 25b are respectively provided on the cover body 24 and the seal receiving portion 26 formed at positions facing each other with the bearing 23 sandwiched between the axial directions of the first joints 22, whereby the bearing case 21 is provided. The space formed by the inner side and the first joint 22 is formed so as to be able to be sealed.

The joint member 40 includes a second joint 41 and a joint case 42 that houses the second joint 41 therein.
The second joint 41 is formed so as to be capable of being assembled into a cylindrical shape by integrally joining a pair of semi-cylindrical members with bolts or the like, for example. The second joint 41 is formed in a cylindrical shape so that the transmission portion 32 and the drive shaft 51 can be fixed. Here, the fixing method of the transmission part 32 and the drive shaft 51 by the second joint 41 is, for example, that a key is provided in the transmission part 32, a key groove is provided in one of the second joints 41, and one of the second joints 41 and the drive are provided. A method may be used in which holes are formed in the shafts 51 and fixed by the pins 45. In addition, the fixing method of the 2nd joint 41, the transmission part 32, and the drive shaft 51 can be set suitably.

  The joint case 42 includes a bolt hole 43 that can be fixed to the motor 10 with the bolt B through the bearing case 21, and a bolt hole 44 that can be fixed with the pump portion 52 and the bolt B described later. The joint case 42 is provided with a mechanical seal through which the drive shaft 51 penetrates and between the joint case 42 and the drive shaft 51 so that the drive shaft 51 can rotate and slide.

  The pump 50 is connected to a drive shaft 51, a plurality of stacked pump units 52, a lowermost pump unit 52, a flow path cover 53 that forms a suction port 54 and a discharge port 55, and an outer periphery of the pump unit 52. And a discharge flow path part 56 that forms a flow path from the uppermost stage of the pump part 52 to the discharge port 55. The suction port 54 of the flow path cover 53 forms a flow path to the pump unit 52, and the discharge port 55 is blocked from the lowermost pump unit 52.

  The pump unit 52 includes a plurality of impellers 57 fixed to the drive shaft 51, a plurality of pump covers 58 that respectively cover the impellers 57, a liner ring 59 provided between the impeller 57 and the pump cover 58, and the drive shaft 51. And a drive bearing 60 provided between the pump cover 58.

  The impeller 57 is formed of, for example, stainless steel or resin, and includes a discharge portion on the outer peripheral side of the impeller 57 and a suction portion on one main surface side (lower surface side in the drawing) of the impeller 57.

  The pump cover 58 is formed in a bowl shape, and includes an accommodating portion for accommodating the impeller 57 inside, and a flowing water channel (water flow F) formed in the outer peripheral direction of the pump cover 58 from the center side of the accommodating portion. . In addition, when this pump cover 58 is connected, this flowing water channel forms the water flow F which continues with the accommodating part of the other pump cover 58.

  The pump cover 58 is formed so that the pump cover 58, the joint case 42, and the flow path cover 53 that are vertically adjacent to each other can be connected to each other, and the joint case 42 and the flow path cover 53 are fastened with bolts or the like. It can be fixed with. The pump cover 58, the joint case 42, and the flow path cover 53 are sealed (sealed) with a sealing member such as an O-ring so that water inside does not leak.

  The pump cover 58 includes a through hole that is separated from the impeller 57 by a predetermined gap, and a through hole in which the drive shaft 51 and the drive bearing 60 are provided. A liner ring 59 is provided at the inner peripheral edge of the through hole. Is provided.

  In the vertical pump device 1 configured as described above, when the rotary shaft 11 is rotated by the motor 10, the drive shaft 51 is also rotated (driven) from the rotary shaft 11 via the first joint 22 and the second joint 41. It becomes. When the drive shaft 51 is driven, the impeller 57 fixed to the drive shaft 51 also follows and rotates. By such rotation of the shaft portion 2, water is sucked from the suction portion of the impeller 57, the pressure is increased, and water is discharged from the discharge portion of the impeller 57. Thus, the water sucked from the suction portion of the impeller 57 passes through the impeller 57 sequentially through the inside of the impeller 57 and is pumped up as shown by the water flow F.

  At this time, since the pressure of water is increased by the impeller 57, a difference occurs in pressure between the lowermost pump unit 52 and the uppermost pump unit 52. That is, the water sucked from the suction port 54 is increased in pressure by the lowermost pump unit 52 and moves to the second pump unit 52. Next, the increased pressure is further increased by the second-stage pump unit 52 and moves to the next pump unit 52. In this way, the water repeatedly moves to the next pump unit 52 while the pressure increase is repeated, and the water increased in pressure by the uppermost pump unit 52 passes to the discharge port 55 via the discharge flow path unit 56. And move.

  Therefore, the uppermost pump unit 52 has a higher water pressure than the lowermost pump unit 52, and a pressure difference is generated in each pump unit 52, and each impeller 57 has a gravity direction (from the uppermost pump unit 52. A load (water pressure) is applied in the direction toward the lowermost pump unit 52). In addition, since the impeller 57 is fixed to the drive shaft 51, a load applied to the impeller 57 is applied to the drive shaft 51 along the axial direction of the drive shaft 51.

  Here, since the drive shaft 51 is connected continuously to the rotary shaft 11, the first joint 22, and the second joint 41 as the shaft portion 2, the load in the gravity direction applied to the drive shaft 51 is the shaft portion 2. Will join the whole. That is, the load in the gravitational direction of the impeller 57 is applied to the first joint 22 and the rotary shaft 11 via the drive shaft 51 and the second joint 41 (pulled in the axial direction by the impeller 57).

  For this reason, the load (thrust load) that tends to move in the gravity direction (the pump 50 side along the axial direction) of the first joint 22 is applied to the bearing 23 by the lower surface of the large-diameter portion 29 of the first joint 22. Will be applied.

  The bearing 23 uses an angular ball bearing that can hold both radical load and thrust load, so that the thrust load is held by the bearing 23 without hindering the rotation of the shaft portion 2. In other words, the rotation of the rotary shaft 11 is transmitted to the impeller 57 by reducing the loss due to the load as much as possible by holding the radial load and the thrust load with the bearing 23.

  As described above, when the impeller 57 is rotated by the motor 10 via the shaft portion 2, the shaft portion 2 rotates while the thrust load and the radial load due to the rotation of the shaft portion 2 are held by the bearing 23. Become.

  In the bearing 23, friction due to rotational sliding and heat generation due to rotational sliding are generated by the rotation of the shaft portion 2, and the lubricant provided in the bearing 23 is scattered and evaporated.

  At this time, the bearing 23 is provided in the internal space of the bearing member 20, and the internal space of the bearing member 20 is held in a substantially sealed state by the seal members 25a and 25b. For this reason, the lubricant scattered and evaporated from the bearing 23 hardly moves to the outside of the bearing member 20, and the scattered and evaporated lubricant can be reattached to the bearing 23, other parts, or the bearing member 20. It will float in a vaporized state in the internal space. In addition, the lubricant prevents as much as possible the direct contact (exposing) of external gas.

  As described above, according to the vertical pump device 1, by using an angular ball bearing as the bearing 23, it is possible to hold both radical load and thrust load. It becomes possible to prevent a decrease in rotational efficiency.

  Further, the scattering and evaporation of the lubricant from the angular ball bearing, which occurs when an angular ball bearing is used as the bearing 23, restricts the movement of the lubricant from the bearing member 20 to the outside by the seal members 25a and 25b. This makes it possible to prevent the lubricant from depleting and deteriorating. That is, the bearing member 20 has the lubricant retaining function of the bearing 23 by the seal members 25a and 25b, and the refilling of the lubricant can be minimized. Further, the seal members 25a and 25b can prevent the lubricant from directly contacting an external gas as much as possible, and prevent deterioration due to oxidation of the lubricant.

  Since the seal members 25a and 25b are provided above and below the bearing 23, it is possible to prevent the lubricant from leaking to the outside, so that the lubricant is not scattered or leaked from the bearing member 20 to the outside. . For this reason, the circumference | surroundings of the bearing member 20 are not polluted. In particular, since the vertical pump device 1 is often used for water, the sealing members 25a and 25b can prevent water from being contaminated by leakage of the lubricant.

  Further, the seal members 25a and 25b can prevent contamination such as dust and dust from entering the bearing 23 and the lubricant. Further, when the vertical pump device 1 is exposed to the outside air, it is possible to prevent water or the like from entering the bearing member 20 due to weather (wind), water leakage due to damage to the pump 50 or the mechanical seal, and the like. .

  In particular, when water adheres to the bearing 23, corrosion and rust are generated on the bearing 23, which causes a decrease in load resistance, an increase in rotational resistance, and the like, possibly resulting in a decrease in performance of the vertical pump device 1. Thus, by providing the seal members 25a and 25b, the reliability of the vertical pump device 1 is prevented from being lowered, and the versatility of the vertical pump device 1 is improved.

  Furthermore, metal labyrinth seals are used for the seal members 25a and 25b, and the seal members 25a and 25b are provided above and below the bearing 23, so that not only the bearing 23 but also the rotation of the first joint 22 is provided. The metal labyrinth seal is also subjected to the rotational sliding of the first joint 22. In particular, when the length of the first joint 22 is long, rotational blur occurs at the top and bottom. However, by using a metal labyrinth seal for the seal members 25a and 25b, it is possible to reduce blurring, and to reduce noise and rotation loss due to blurring. That is, the operation efficiency of the vertical pump device 1 is improved.

  The bearing 23 and the seal members 25a and 25b are surrounded by the bearing case 21, the motor 10, and the joint member 40, and thus have an effect of reducing noise generated by rotational sliding.

  The bearing member 20 can be fixed between the motor 10 and the joint member 40 by the bolt B. Furthermore, the rotation shaft 11 and the second joint 41 need only be fixed by a key, a pin 45 or the like. Becomes easy.

  More specifically, the life of the bearing 23 is determined for a certain period. If the life exceeds the life, noise / vibration increases, accuracy decreases due to wear, fatigue peeling of the rolling surface, deterioration of the lubricant, and the like occur. For this reason, the bearing 23 needs to be replaced (maintenance) after a certain period of time. Here, since not only the bearing 23 but also the seal members 25a and 25b, the first joint 22 and the like are worn by sliding, the bearing member 20 is used as an assembly (component assembly) at the time of any one of these lifetimes. Replacing the entire bearing member 20 is mainly performed.

  At this time, the entire bearing member 20 can be replaced with a minimum amount of attachment and detachment of the bolt B, the pin 45, the key, and the like of the bearing case 21, and the workability is good. Can be shortened. Further, since it is sufficient to perform the replacement work at a minimum, it is possible to prevent work errors during the replacement work.

  Even if the bearing member 20 is not replaced as a whole, but only the bearing 23 is replaced, the bearing member 20 is removed from the vertical pump device 1 and the bolt B fixing the lid 24 is removed. The bearing 23 can be replaced simply by removing the lid 24 and the first joint 22. As described above, even when only the bearing 23 is replaced, the bearing 23 can be easily replaced, and the bearing member 20 is configured with good workability, that is, good maintainability.

  As described above, according to the vertical pump device 1 according to the present embodiment, the bearing member 20 prevents leakage and deterioration of the lubricant in the bearing 23 and has a lubricant holding function. As a result, the life of the bearing 23 can be improved. In addition, since the bearing member 20 can be integrally fixed to the motor 10 and the joint member 40 with the bolt B, the bearing member 20 can be easily attached and detached. Moreover, the maintenance property can be improved by adopting a configuration in which the bearing 23 is fixed by the lid body 24 and the first joint 22.

  Further, the bearing 23 and the seal members 25a and 25b provided on the bearing member 20 can reduce the loss due to the rotation and sliding of the first joint 23 or each load, thereby improving the operation efficiency of the vertical pump device 1. And noise can be reduced.

  The present invention is not limited to the above embodiment. For example, the above-described seal members 25a and 25b are labyrinth seals having a sawtooth cross section, but may not be sawtooth shapes, for example, a square tooth labyrinth seal or any other shape. In addition, although a plurality of the bearings 23 described above are provided, this may be a single number depending on the load applied to the shaft portion 2, and the number can be set as appropriate. In addition, various modifications can be made without departing from the scope of the present invention.

The side view which shows the partial notch of the vertical pump apparatus which concerns on one embodiment of this invention. The expanded sectional view which shows the structure of the sealing member of a simultaneous pump apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Vertical pump apparatus, 2 ... Shaft part, 10 ... Motor, 11 ... Rotary shaft, 12 ... Outer case, 13 ... Eye bolt, 14 ... Fin, 15 ... Bolt hole, 20 ... Bearing member, 21 ... Bearing case, 22 ... 1st joint (joint), 23 ... Bearing, 24 ... Lid, 25a, 25b ... Seal member, 27 ... Holding part, 28 ... Through hole, 29 ... Large diameter part, 30 ... Small diameter part, 31 ... Insertion of rotating shaft Hole 32, transmitting portion 33 33 small diameter portion 34 34 inner diameter side seal 35 35 outer diameter side seal 40 40 joint member 41 second joint 42 joint case 43 bolt hole 44 bolt hole 45 ... Pin, 50 ... Pump, 51 ... Drive shaft, 52 ... Pump part, 53 ... Flow path cover, 54 ... Suction port, 55 ... Discharge port, 56 ... Discharge flow path part, 57 ... Impeller, 58 ... Pump cover 59 ... liner ring, 60 ... drive bearing, B ... bolt, F ... Flow of.

Claims (6)

A joint that transmits rotational force;
This joint, or a joint case covering at least the outer peripheral surface side of a part of the joint;
A bearing provided inside the joint case, capable of holding a load in a thrust direction and a radial direction of the joint, and rotatably supporting the joint;
A seal member provided between the joint and the joint case, and a seal member provided at a position facing each other across the bearing in the axial direction of the joint.   The bearing member according to claim 1, wherein the seal member is a labyrinth seal formed of a metal material.   The bearing member according to claim 1, wherein the bearing is an angular ball bearing. A motor having a rotation axis whose axial direction is along the direction of gravity;
One end is connected to the rotating shaft, and the joint transmits the rotational force of the rotating shaft to the other end.
A joint case covering at least the outer peripheral surface side of the joint or the joint; and
A bearing provided inside the joint case, capable of holding a load in a thrust direction and a radial direction of the joint, and supporting the joint;
Seal members provided between the joint and the joint case, and at positions facing each other across the bearing in the axial direction of the joint;
A drive shaft connected to the other end of the joint and driven by rotation of the joint;
A vertical pump device comprising: a plurality of pump units connected to the drive shaft and having a plurality of impellers that rotate in accordance with the drive of the drive shaft.   The vertical pump device according to claim 4, wherein the seal member is a labyrinth seal formed of a metal material.   The vertical pump device according to claim 4, wherein the bearing is an angular ball bearing.

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