JP2014114819A - Shaft joint and pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shaft joint which can easily adjust a position of a rotating shaft in a shaft length direction, and a pump.SOLUTION: A first joint member 25 is rotatable integrally with an output shaft 14 and connected to the output shaft 14 so as to be relatively movable to a shaft length direction A, a second joint member 26 is rotatable integrally with a rotating shaft 7 and connected to the rotating shaft 7 so as to be relatively movable to the shaft length direction A, the first joint member 25 and the second joint member 26 are rotatable integrally with each other via a first spline engagement part 27 and connected to each other so as to be relatively movable to the shaft length direction A, the rotating shaft 7 is engaged with the first joint member 25 in the shaft length direction A, and an interval adjusting member 49 for adjusting an interval between the first joint member 25 and the second joint member 26 in the shaft length direction A is arranged so as to be detachable.

Description

  The present invention relates to a shaft coupling used for, for example, a pump and a pump including the shaft coupling.

  Conventionally, as this type of shaft coupling, for example, as shown in FIG. 7, there is one used for a vertical shaft pump. In this shaft joint, a first joint member 102 is coupled to an upper drive side shaft 101 via a key 103, and a second joint member 105 is coupled to a lower main shaft 104 (rotary shaft) via a key 106. . The first joint member 102 has a flange portion 102 a at the lower end portion, the second joint member 105 has a flange portion 105 a at the upper end portion, and adjustment is performed between the upper and lower sides of the first joint member 102 and the second joint member 105. A plate 108 is sandwiched.

  The main shaft 104 has a male screw portion 109 at its upper end, and the adjustment plate 108 is screwed into the male screw portion 109. A plurality of reamer bolts 110 are inserted through the flange portion 102 a of the first joint member 102, the flange portion 105 a of the second joint member 105, and the adjustment plate 108, and a nut 111 is screwed to each reamer bolt 110.

The drive side shaft 101 is forcibly rotated by an electric motor or the like. An impeller (not shown) is provided at the lower end of the main shaft 104.
According to this, by rotating the drive side shaft 101 by the electric motor, the rotation of the drive side shaft 101 is transmitted to the main shaft 104 via the first joint member 102, the reamer bolt 110 and the second joint member 105, and together with the main shaft 104. The impeller rotates.

Further, when adjusting the gap between the impeller blades and the pump casing, the position of the main shaft 104 in the axial length direction A is adjusted by the following procedure.
First, as shown in FIG. 8, each reamer bolt 110 and nut 111 are removed, and the main shaft 104 is lowered until the blades of the impeller abut against the pump casing. Next, the adjustment plate 108 is turned to turn the main shaft 104 in the axial direction. A is moved to A (vertical direction) to adjust the distance B in the axial length direction A between the upper surface of the adjustment plate 108 and the upper end surface of the main shaft 104, and then, as shown in FIG. 9, the flange portion of the first joint member 102 The main shaft 104 is lifted by inserting the lifting bolt 113 into the flange portion 105a of the second joint member 105 and the adjusting plate 108 and tightening with the nut 114. Then, with the adjustment plate 108 sandwiched between the first joint member 102 and the second joint member 105, the lifting bolts 113 are replaced with reamer bolts 110 one by one.

  For example, when the clearance between the impeller blades and the pump casing is 5 mm, and this clearance is increased by 1 mm and adjusted to 6 mm, the reamer bolts 110 and the nuts 111 are removed and the main shaft 104 is lowered by the procedure described above. Then, the distance B shown in FIG. 8 is measured. For example, when the distance B is 2 mm, the adjustment plate 108 is rotated and moved in the axial direction A of the main shaft 104 to adjust the distance B from 2 mm to 3 mm. To do. Thereafter, the main shaft 104 is lifted using the lifting bolts 113, and the lifting bolts 113 are replaced with reamer bolts 110 one by one.

As described above, by adjusting the position of the main shaft 104 in the axial length direction A, the gap between the impeller blades and the pump casing can be adjusted.
The shaft coupling as described above is described in, for example, Patent Document 1 below.

JP2002-181060

  However, in the above conventional type, when adjusting the position of the main shaft 104 in the axial length direction A, the main shaft 104 is once lowered until the impeller contacts and is received by the pump casing. Since the main shaft 104 (rotating shaft) is lifted using the lifting bolts 113 after adjusting B, there is a problem that considerable labor is required.

  An object of this invention is to provide the shaft coupling and pump which can adjust the position of the rotating shaft in an axial length direction easily.

In order to achieve the above object, the first invention is a shaft coupling that connects an output shaft that transmits a driving force to a rotating machine and a rotating shaft of the rotating machine,
The first joint member is integrally rotatable with the output shaft and joined to the output shaft so as to be relatively movable in the axial direction.
The second joint member is integrally rotatable with the rotary shaft and joined to the rotary shaft so as to be relatively movable in the axial direction.
The first joint member and the second joint member are joined together via the first spline fitting portion so as to be integrally rotatable and relatively movable in the axial direction.
The rotating shaft engages with the first joint member in the axial direction;
The second joint member is prevented from moving in the direction from the output shaft to the rotation shaft,
Between the 1st joint member and the 2nd joint member, the space | interval adjustment member which adjusts the space | interval of the axial direction of a 1st joint member and a 2nd joint member is provided so that attachment or detachment is possible.

According to this, when the output shaft rotates, the rotation of the output shaft is transmitted to the rotating shaft via the first joint member, the first spline fitting portion, and the second joint member, and the rotating shaft rotates. .
When adjusting the position of the rotating shaft by shifting the position of the rotating shaft in the axial length direction, the distance between the first joint member and the second joint member is enlarged, and the distance adjusting member is adjusted according to the distance by which the rotating shaft is shifted. Replace with a gap adjustment member with a different thickness.

  Accordingly, since the rotation shaft is displaced in the axial direction, the position of the rotation shaft can be easily adjusted. For example, the interval between the rotation member provided on the rotation shaft and the peripheral member of the rotation member is easily adjusted. be able to.

The shaft coupling according to the second aspect of the present invention can be attached with a moving operation means for moving the first coupling member in the axial length direction with respect to the second coupling member.
According to this, when adjusting the position of the rotating shaft, the first joint member and the second joint member are attached by moving the first joint member in the axial length direction with respect to the second joint member by attaching the moving operation means. Can be easily expanded or reduced.

In the shaft joint according to the third aspect of the invention, the first joint member is divided into a third joint member and a fourth joint member,
The fourth joint member is provided between the third joint member and the second joint member in the axial direction,
The third joint member is integrally rotatable with the output shaft and joined to the output shaft so as to be relatively movable in the axial direction.
The second joint member and the fourth joint member are joined so as to be relatively movable in the axial direction through the first spline fitting portion,
The third joint member and the fourth joint member are joined so as to be relatively movable in the axial direction through the second spline fitting portion.
The rotating shaft engages with the fourth joint member in the axial direction;
The interval adjusting member is sandwiched between the second joint member and the fourth joint member, and adjusts the interval between the second joint member and the fourth joint member.

  According to this, when the output shaft rotates, the output shaft rotates through the third joint member, the second spline fitting portion, the fourth joint member, the first spline fitting portion, and the second joint member. The rotation axis is transmitted to the rotation axis.

When adjusting the position of the rotating shaft by shifting the position of the rotating shaft in the axial direction, the following is performed.
First, the distance between the fourth joint member and the second joint member is enlarged, and the distance adjustment member is replaced with a distance adjustment member having a thickness corresponding to the distance by which the rotation shaft is displaced. As a result, the distance between the second joint member and the fourth joint member is changed, and the rotation axis is displaced in the axial length direction by the difference between the changed distance and the previous change distance. Can be adjusted.

In the shaft coupling according to the fourth aspect of the present invention, the moving operation means includes a screw hole formed in the fourth joint member and a screw member screwed into the screw hole in the axial length direction.
According to this, by screwing the screw member into the screw hole and rotating in one direction, the fourth joint member is fed in the axial direction with respect to the second joint member, and the fourth joint member and the second joint member The interval of increases. Moreover, the space | interval of a 4th joint member and a 2nd joint member reduces by reversely rotating a screw member to another direction.

Thus, since the space | interval of a 4th joint member and a 2nd joint member can be expanded / contracted only by screwing and screwing a screw member in a screw hole, the position of a rotating shaft can be adjusted easily. .
In the shaft coupling according to the fifth aspect of the invention, the distance adjusting member is a shim that is detachable from the outside in the radial direction.

According to this, when adjusting the position of a rotating shaft, the attachment / detachment operation | work of a space | interval adjustment member can be performed easily.
In the shaft coupling according to the sixth invention, the axial direction is the vertical direction,
The output shaft is above the rotation shaft,
The first joint member is above the second joint member.

In the seventh invention, the rotary machine including the shaft coupling according to any one of the first invention to the sixth invention is a pump,
The output shaft is rotationally driven by the drive device, and transmits the rotational driving force to the rotational shaft via the shaft coupling,
The rotating shaft is provided with an impeller.

  According to this, since the position of the rotating shaft can be easily adjusted by shifting the position of the rotating shaft in the axial direction, the clearance between the impeller (rotating member) and the pump casing (peripheral member) can be easily adjusted. It becomes possible to do.

In the pump according to the eighth aspect of the invention, the pump casing has a suction casing at the bottom and a discharge casing at the top.
The rotating shaft and the impeller are provided in the pump casing,
The axial direction of the rotation axis is the vertical direction,
A reduction gear is mounted on the discharge casing,
The speed reducer has an output shaft,
The rotating shaft is the main shaft of the pump.

  According to this, since the position of the main shaft can be easily adjusted by shifting the position of the main shaft in the axial length direction, the gap between the impeller and the pump casing can be easily adjusted.

  As described above, according to the present invention, the position of the rotary shaft in the axial length direction can be easily adjusted, and in a pump having a shaft coupling, the gap between the impeller and the pump casing can be easily adjusted. It becomes possible.

It is a longitudinal cross-sectional view of the pump in embodiment of this invention. It is a longitudinal cross-sectional view of the shaft coupling with which the pump was equipped. FIG. 2 is a partially enlarged longitudinal sectional view of the shaft joint, wherein the left half (a) is a state where a shim is attached, and the right half (b) is a distance between the flange portion of the second joint member and the flange portion of the fourth joint member. Is shown with the shim removed. It is a top view of a shaft coupling similarly. FIG. 3 is an XX arrow view in FIG. 2. It is a top view of the shim of a shaft coupling similarly. It is a longitudinal cross-sectional view of the shaft coupling of the conventional pump. It is a longitudinal cross-sectional view which shows the procedure of the position adjustment of the main shaft of a pump same as the above. It is a longitudinal cross-sectional view which shows the procedure of the position adjustment of the main shaft of a pump same as the above.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
As shown in FIG. 1, reference numeral 1 denotes a vertical shaft pump which is an example of a rotary machine. A pump casing 2 has a suction casing 3 at a lower end portion and an elbow-shaped discharge casing 4 at an upper portion. A suction port 3 a is formed in the suction casing 3, and a discharge port 4 a is formed in the discharge casing 4. A main shaft 7 (an example of a rotating shaft) is inserted into the pump casing 2, and an impeller 8 is provided at a lower end portion of the main shaft 7. An upper portion of the main shaft 7 penetrates the discharge casing 4 from the pump casing 2. Projecting upward.

  A prime mover 9 (an example of a drive device) that rotationally drives the main shaft 7 is installed on the upper side of the pump casing 2. The prime mover 9 is composed of an engine or the like. Between the prime mover 9 and the main shaft 7, there are provided a reduction gear 11 that decelerates the rotation of the prime mover 9 and transmits it to the main shaft 7, and a clutch device 12 that connects and separates the prime mover 9 and the reduction gear 11. Yes.

  The reduction gear 11 is mounted on the discharge casing 4 and meshes with the input shaft 13, the output shaft 14, the transmission shaft 15 that transmits the rotation of the input shaft 13 to the output shaft 14, and the casing 16. It has a pair of bevel gears 17 and 18 and a pair of spur gears 19 and 20 that mesh with each other.

  The input shaft 13 is connected to the drive shaft 21 of the prime mover 9 through the clutch device 12 in a separable manner. The transmission shaft 15 is divided into first and second divided transmission shafts 15a and 15b, and the input shaft 13 and the first divided transmission shaft 15a are interlocked via a pair of bevel gears 17 and 18. One bevel gear 17 is provided on the input shaft 13 and the other bevel gear 18 is provided on the first split transmission shaft 15a.

  The first split transmission shaft 15a and the second split transmission shaft 15b are connected to each other through the first shaft coupling 22 so as to be separable. The second split transmission shaft 15b and the output shaft 14 are interlocked via a pair of spur gears 19 and 20. One spur gear 19 is provided on the second split transmission shaft 15 b, and the other spur gear 20 is provided on the output shaft 14. The axial direction A of the main shaft 7 is the vertical direction, and the output shaft 14 is above the main shaft 7.

  The lower end portion of the output shaft 14 and the upper end portion of the main shaft 7 are connected to each other through a second shaft joint 23 so as to be separable. As shown in FIGS. 2 to 5, the second shaft joint 23 includes a first joint member 25 and a second joint member 26 provided below the first joint member 25. The first joint member 25 is rotatable integrally with the output shaft 14 and is joined to the lower end portion of the output shaft 14 so as to be relatively movable in the axial direction A. The second joint member 26 is rotatable integrally with the main shaft 7 and joined to the upper end portion of the main shaft 7 so as to be relatively movable in the axial direction A. The first joint member 25 and the second joint member 26 are joined together via the first spline fitting portion 27 so as to be integrally rotatable and relatively movable in the axial direction A.

  The first joint member 25 is divided into a third joint member 29 and a fourth joint member 30. The fourth joint member 30 is provided between the upper third joint member 29 and the lower second joint member 26 in the axial direction A.

  The second joint member 26 and the fourth joint member 30 are joined so as to be relatively movable in the axial direction A via the first spline fitting portion 27. The third joint member 29 and the fourth joint member 30 are joined to each other in the axial length direction A via the second spline fitting portion 31 so as to be relatively movable. Further, the third joint member 29 is joined to the output shaft 14 through the third spline fitting portion 32 so as to be movable in the axial direction A.

  The third joint member 29 is a cylindrical member and has a third flange portion 35 at the lower end. The lower end portion of the output shaft 14 is inserted into the third joint member 29, the spline formed on the entire outer periphery of the lower end portion of the output shaft 14, and the upper portion formed on the entire inner periphery of the third joint member 29. A third spline fitting portion 32 is formed by fitting the splines with each other.

  The fourth joint member 30 is a cylindrical member and has a fourth flange portion 36 at the top. The upper end portion of the fourth joint member 30 is inserted into the lower end portion of the third joint member 29, and the lower spline formed on the entire inner peripheral surface of the third joint member 29 and the outer peripheral surface of the fourth joint member 30 are all The second spline fitting portion 31 is formed by fitting the upper splines formed around the circumference.

  The upper end portion of the main shaft 7 is inserted into the fourth joint member 30 from below. A fitting groove 41 is formed on the outer periphery of the upper end portion of the main shaft 7, and an annular split collar 42 is fitted into the fitting groove 41, thereby preventing the collar 42 from coming out of the fitting groove 41. The retaining ring 43 is attached to the upper end surface of the fourth joint member 30. The collar 42 is engaged with the upper end surface of the fourth joint member 30 from above while being fitted in the fitting groove 41. As a result, the main shaft 7 is engaged with the fourth joint member 30 in the axial length direction A via the collar 42.

  The 2nd joint member 26 is a cylindrical member, and has the 2nd flange part 45 in the upper part. The lower part of the fourth joint member 30 is inserted into the upper part of the second joint member 26 from above, and the lower spline formed on the entire outer periphery of the fourth joint member 30 and the upper part of the inner peripheral surface of the second joint member 26. The first spline fitting portion 27 is formed by fitting together the upper splines formed on the entire circumference.

  The second joint member 26 is rotatably supported by a support pedestal 48 via a bearing 47 and is prevented from moving in the direction from the output shaft 14 toward the main shaft 7 (that is, downward). The support base 48 is attached to the discharge casing 4. The upper end portion of the main shaft 7 is inserted into the second joint member 26 from below. The main shaft 7 and the second joint member 26 are interlocked so as to be integrally rotatable via a key 46, and are joined so as to be relatively movable in the axial direction A. That is, the key 46 provided at the upper end portion of the main shaft 7 moves in the axial direction A in the key groove in a state where the key 46 is fitted in a key groove (not shown) formed on the inner peripheral surface of the second joint member 26. Thus, the main shaft 7 is movable in the axial length direction A with respect to the second joint member 26.

  In the present embodiment, the main shaft 7 and the second joint member 26 are rotatable via the key 46 as described above. However, as long as the structure transmits the rotation and is movable in the axial length direction A, Of course, instead of the key 46, spline fitting may be used.

  The flange portion 36 of the fourth joint member 30 is sandwiched between the flange portion 35 of the third joint member 29 and the flange portion 45 of the second joint member 26. The flange portions 45, 35, and 36 of the second to fourth joint members 26, 29, and 30 are connected in the axial length direction A by a plurality of connecting bolts 58 inserted in the axial length direction A.

  A shim 49 (an example of a spacing adjusting member) that adjusts the distance between the second joint member 26 and the fourth joint member 30 in the axial direction A is a flange portion 45 of the second joint member 26 and a flange portion of the fourth joint member 30. 36 is detachably sandwiched between the two.

  A space 56 surrounded by the third and fourth joint members 29 and 30, the lower end portion of the output shaft 14 and the upper end portion of the main shaft 7 is formed inside the second shaft joint 23. The space 56 is filled with lubricating oil. A plurality of sealing materials 57a and 57b (for example, O-rings or the like) for preventing the lubricating oil from leaking out of the second shaft joint 23 are formed on the fourth joint member 30, the output shaft 14 and the main shaft 7, respectively. Provided in the groove. Among these, the sealing material 57 a is provided in the flange portion 36 of the fourth joint member 30, and seals between the flange portion 36 of the fourth joint member 30 and the flange portion 35 of the third joint member 29.

  The connecting bolt 58 is provided to connect the flange portions 45, 35, and 36 of the second to fourth joint members 26, 29, and 30 to compress the sealing material 57a in the vertical direction and to ensure sealing performance. The rotational force is transmitted not by the connecting bolt 58 but by the spline fitting portions 27 and 31.

  The output shaft 14 is provided with a supply / reflux passage (not shown) for supplying the lubricant to the space 56 and returning it. Similarly, the fourth joint member 30 is formed with a supply / reflux passage (not shown) for supplying the lubricant in the space 56 to the first spline fitting portion 27 and returning it. Further, the second joint member 26 is formed with a discharge passage (not shown) for discharging the lubricating oil in the space 56 to the outside.

  The fourth joint member 30 can be moved in the axial direction A with respect to the second joint member 26 by a movable operation means 52 that can be attached. The moving operation means 52 includes a plurality of screw holes 53 penetrating the upper and lower surfaces formed in the flange portion 36 of the fourth joint member 30 and a plurality of jacks removably screwed into the screw holes 53 in the axial length direction A. It consists of a bolt 54 (an example of a screw member). The flange portion 35 of the third joint member 29 is formed with a plurality of cutout portions 55 into which the jack bolts 54 can be inserted.

  As shown in FIG. 6, the shim 49 is a semi-annular plate member obtained by dividing an annular flat plate member into two, and includes a plurality of first cutout portions 60 through which jack bolts 52 can be inserted, and connection bolts 58. It has a plurality of second cutout portions 61 that can be inserted. Among these, the first cutout portions 60 formed at the divided portions C are open at both ends in the radial direction of the shim 49, and the first cutout portions 60 formed at other portions and the respective second cutouts. Each of the portions 61 is open to the inner periphery of the shim 49. Thereby, each shim 49 is detachable between the flange portion 45 of the second joint member 26 and the flange portion 36 of the fourth joint member 30 from the outside in the radial direction.

  In the present embodiment, the shim 49 obtained by dividing an annular flat plate material into two parts is described. However, a plurality of shims divided into three or more parts may be used. Further, the first and second cutout portions 60 and 61 are formed in the shim 49. However, instead of the cutout portions 60 and 61, a space through which the jack bolt 52 can be inserted between the adjacent shims, and the connecting bolt A space through which 58 can be inserted may be formed. Further, as shown by the phantom line in FIG. 6, a detachable handle 63 may be provided on the outer periphery of the shim 49.

Hereinafter, the operation of the above configuration will be described.
As shown in FIG. 1, when the prime mover 9 is driven and the drive shaft 21 is rotationally driven, the rotation of the drive shaft 21 is transmitted to the input shaft 13 of the speed reducer 11 via the clutch device 12. Are transmitted to the output shaft 14 through the pair of bevel gears 17 and 18, the transmission shaft 15 and the pair of spur gears 19 and 20, and the output shaft 14 rotates. Further, the rotation of the output shaft 14 is transmitted to the main shaft 7 via the second shaft joint 23, and the impeller 8 rotates together with the main shaft 7. Thereby, water is suck | inhaled in the pump casing 2 from the suction inlet 3a, and is discharged from the discharge outlet 4a.

  At this time, as shown in FIG. 2, the rotation of the output shaft 14 is transmitted to the third joint member 29 via the third spline fitting portion 32, and the second spline fitting portion 31 is transmitted from the third joint member 29. Is transmitted to the fourth joint member 30, transmitted from the fourth joint member 30 to the second joint member 26 via the first spline fitting portion 27, and transmitted from the second joint member 26 to the main shaft 7 via the key 46. Communicated.

  As described above, since the rotational force is transmitted through the spline fitting portions 27, 31, 32, it is possible to increase the torque transmission amount per unit shaft length as compared with the key. The dimension in the axial length direction A can be reduced as compared with the shaft coupling using Thereby, the shaft coupling 23 becomes compact in the axial length direction A, and when the speed reducer 11 is installed on the pump 1, the height of the building can be lowered and the construction cost can be reduced.

  When adjusting the clearance between the blades of the impeller 8 and the pump casing 2, the prime mover 9 is stopped or the clutch device 12 is operated to block the rotation transmission path from the prime mover 9 to the reduction gear 11, thereby reducing the reduction gear 11. The rotation of the output shaft 14 and the main shaft 7 of the vertical pump 1 is stopped. For example, when the gap between the blades of the current impeller 8 and the pump casing 2 is 3 mm, the thickness t of the shim 49 is 4 mm, and the gap is increased from 3 mm to 2 mm and adjusted to 5 mm, the following In such a procedure, the position of the main shaft 7 is adjusted by shifting the position of the main shaft 7 in the axial length direction A.

  First, the lubricating oil in the space 56 is discharged from a discharge passage (not shown) formed in the second joint member 26 to the outside, and the connecting bolt 58 is removed. Next, as shown by the right half (b) of FIG. 3 and the phantom line of FIG. 4, a plurality of jack bolts 54 are inserted into the respective notches 55 of the flange portion 35 of the third joint member 29, and the fourth joint It is screwed into each screw hole 53 of the flange portion 36 of the member 30 and turned in one direction to be tightened. Thereby, as shown in the right half (b) of FIG. 3 and FIGS. 5 and 6, the tip of each jack bolt 54 is inserted into each first notch 60 of the shim 49 and In contact with the upper end surface, in this state, the fourth joint member 30 is sent upward (in the axial length direction A) relative to the second joint member 26. As a result, the third and fourth joint members 29 and 30 are raised relative to the second joint member 26, and the distance between the flange portion 45 of the second joint member 26 and the flange portion 36 of the fourth joint member 30 is increased. A gap is formed between the shim 49 and the flange portion 36 of the fourth joint member 30.

  In addition, by tightening each of the plurality of jack bolts 54 little by little, the flange portion 36 of the second joint member 26 and the flange portion 36 of the fourth joint member 30 It is possible to uniformly widen the intervals.

  In this state, as shown in the right half (b) of FIG. 3, the current shim 49 having a thickness of 4 mm is formed between the flange portion 45 of the second joint member 26 and the flange portion 36 of the fourth joint member 30. Pull out outward in the direction, and insert another shim 49 having a thickness of 6 mm, 2 mm thicker than the current state, between the flange portion 45 of the second joint member 26 and the flange portion 36 of the fourth joint member 30 from the radially outer side.

  Then, the fourth joint member 30 is sent downward (in the axial length direction A) with respect to the second joint member 26 by reversely rotating each jack bolt 54 in the other direction. As a result, the third and fourth joint members 29 and 30 are lowered relative to the second joint member 26, and the distance between the flange portion 45 of the second joint member 26 and the flange portion 36 of the fourth joint member 30 is reduced. The shim 49 is sandwiched and attached between the flange portion 45 of the second joint member 26 and the flange portion 36 of the fourth joint member 30.

  Thereby, the space | interval of the flange part 45 of the 2nd joint member 26 and the flange part 36 of the 4th joint member 30 is changed from 4 mm to 6 mm, and only the difference of the space | interval after a change and the space | interval before a change, ie, 2 mm, is a main shaft. 7 shifts upward (moves), so that the gap between the blades of the impeller 8 and the pump casing 2 is adjusted from 3 mm to 5 mm. The vertical movement of the third and fourth joint members 29, 30 is allowed by the first and third spline fitting portions 27, 32. Further, the vertical movement of the main shaft 7 with respect to the second joint member 26 is allowed by the key 46 and the key groove.

  Thereafter, as shown in FIG. 2, the jack bolt 54 is removed from the screw hole 53, the connecting bolt 58 is attached, and the flange portions 45, 35, 36 of the second to fourth joint members 26, 29, 30 are connected, Lubricating oil is supplied into the space 56 from the supply passage.

  As described above, the gap between the flange portion 45 of the second joint member 26 and the flange portion 36 of the fourth joint member 30 can be easily expanded / reduced using the jack bolt 54, and the impeller 8 can be moved to the lower portion of the pump casing 2. It is not necessary to lower the main shaft 7 until it comes into contact with and is received. Thereby, the position of the main shaft 7 can be easily adjusted, and the gap between the impeller 8 and the pump casing 2 can be easily adjusted.

  As described in the above embodiment, when the position of the rotary shaft 7 is adjusted, first, the first joint member 25 (fourth joint member 30) is moved in the axial length direction A with respect to the second joint member 26. Thus, the distance between the first joint member 25 (fourth joint member 30) and the second joint member 26 is increased. Next, the distance adjusting member 49 is removed from between the first joint member 25 (fourth joint member 30) and the second joint member 26, and the distance adjusting member 49 having a thickness corresponding to the distance by which the rotary shaft 7 is displaced is The first joint member 25 (fourth joint member 30) is attached between the second joint member 26.

  Thereafter, the first joint member 25 (fourth joint member 30) is moved in the axial length direction A with respect to the second joint member 26, and the first joint member 25 (fourth joint member 30), the second joint member 26, Reduce the interval. Thereby, the space | interval of the 1st coupling member 25 (4th coupling member 30) and the 2nd coupling member 26 is changed, and the rotating shaft 7 is axial length direction A only by the difference of the space | interval after a change, and the space | interval before a change. Therefore, the position of the rotating shaft 7 can be easily adjusted. Thereby, the space | interval of the rotating member provided in the rotating shaft 7 and the peripheral member of a rotating member can be adjusted easily, for example.

  Furthermore, a movement operation means 52 for moving the fourth joint member 30 (first joint member 25) in the axial direction A with respect to the second joint member 26 is formed on the fourth joint member 30 (first joint member 25). When the screw member 53 is configured to be screwed into the screw hole 53 in the axial length direction A, the screw member 54 is screwed into the screw hole 53 and rotated in one direction. The fourth joint member 30 (first joint member 25) is sent in the axial direction A with respect to the second joint member 26 in a state where the tip of the second joint member 26 is in contact with the second joint member 26, and the fourth joint member 30 (first The distance between the first joint member 25) and the second joint member 26 is increased. Further, by reversely rotating the screw member 54 in the other direction, the fourth joint member 30 (first joint member 25) is sent to the second joint member 26 in the axial length direction A, and the fourth joint member 30 (first The distance between the first joint member 25) and the second joint member 26 is reduced.

  As described above, the interval between the first joint member 25 (fourth joint member 30) and the second joint member 26 can be expanded and contracted simply by screwing the screw member 54 into the screw hole 53 and rotating it. The position of the shaft 7 can be adjusted more easily.

  In the above embodiment, an example in which the gap between the impeller 8 and the pump casing 2 is increased from the current level is shown. However, when the gap is decreased from the current level, the thickness is similarly thinner than the current level. The shim 49 may be replaced. In this case, the interval between the flange portion 45 of the second joint member 26 and the flange portion 36 of the fourth joint member 30 is reduced, and the main shaft 7 is shifted downward by the difference between the changed interval and the before-change interval ( Moving).

In the above embodiment, specific numerical values are shown for the gap, the thickness of the shim 49, and the like, but these numerical values are examples and are not limited.
In the above embodiment, when adjusting the clearance between the blade of the impeller 8 and the pump casing 2, the jack bolt 54 is inserted into the screw hole 53 of the flange portion 36 of the fourth joint member 30 with the vertical shaft pump 1 stopped. Although it is screwed, the vertical shaft pump 1 may be operated with the jack bolt 54 screwed into the screw hole 53 of the flange portion 36 of the fourth joint member 30 at all times.

  In the above-described embodiment, the vertical shaft pump 1 is described as an example of the rotary machine, but a pump of a horizontal axis other than the vertical axis may be used, or a rotary machine other than the pump may be used. Moreover, although the output shaft 14 of the speed reducer 11 was mentioned as an output shaft, the output shaft of apparatuses (for example, a motor, an engine, etc.) other than the speed reducer 11 may be sufficient.

  In the above embodiment, the adjustment of the gap between the impeller 8 and the pump casing 2 has been described. However, the gap between the rotating member other than the impeller 8 and peripheral members other than the pump casing 2 may be adjusted. .

1 Vertical shaft pump (rotary machine)
2 Pump casing 3 Suction casing 4 Discharge casing 7 Spindle (Rotating shaft)
8 impeller 9 prime mover (drive device)
11 Decelerator 14 Output shaft 23 Second shaft joint 25 First joint member 26 Second joint member 27 First spline fitting portion 29 Third joint member 30 Fourth joint member 31 Second spline fitting portion 49 Shim (interval) Adjustment member)
52 Moving operation means 53 Screw hole 54 Jack bolt (screw member)
A Axis length direction

Claims (8)

A shaft coupling that connects an output shaft that transmits driving force to a rotating machine and a rotating shaft of the rotating machine,
The first joint member is integrally rotatable with the output shaft and joined to the output shaft so as to be relatively movable in the axial direction.
The second joint member is integrally rotatable with the rotary shaft and joined to the rotary shaft so as to be relatively movable in the axial direction.
The first joint member and the second joint member are joined together via the first spline fitting portion so as to be integrally rotatable and relatively movable in the axial direction.
The rotating shaft engages with the first joint member in the axial direction;
The second joint member is prevented from moving in the direction from the output shaft to the rotation shaft,
Between the first joint member and the second joint member, an interval adjusting member for adjusting an interval in the axial length direction between the first joint member and the second joint member is detachably provided. Shaft coupling. The shaft coupling according to claim 1, wherein a moving operation means for moving the first joint member in the axial length direction with respect to the second joint member can be attached. The first joint member is divided into a third joint member and a fourth joint member,
The fourth joint member is provided between the third joint member and the second joint member in the axial direction,
The third joint member is integrally rotatable with the output shaft and joined to the output shaft so as to be relatively movable in the axial direction.
The second joint member and the fourth joint member are joined so as to be relatively movable in the axial direction through the first spline fitting portion,
The third joint member and the fourth joint member are joined so as to be relatively movable in the axial direction through the second spline fitting portion.
The rotating shaft engages with the fourth joint member in the axial direction;
The distance adjusting member is sandwiched between the second joint member and the fourth joint member, and adjusts the distance between the second joint member and the fourth joint member. Shaft coupling. The shaft coupling according to claim 3, wherein the moving operation means includes a screw hole formed in the fourth joint member and a screw member screwed into the screw hole in the axial length direction. The shaft coupling according to any one of claims 1 to 4, wherein the interval adjusting member is a shim that is detachable from the outside in the radial direction. The axial direction is the vertical direction,
The output shaft is above the rotation shaft,
The shaft coupling according to any one of claims 1 to 5, wherein the first joint member is located above the second joint member. The rotary machine including the shaft coupling according to any one of claims 1 to 6 is a pump,
The output shaft is rotationally driven by the drive device, and transmits the rotational driving force to the rotational shaft via the shaft coupling,
A pump characterized in that an impeller is provided on a rotating shaft. The pump casing has a suction casing at the bottom and a discharge casing at the top,
The rotating shaft and the impeller are provided in the pump casing,
The axial direction of the rotation axis is the vertical direction,
A reduction gear is mounted on the discharge casing,
The speed reducer has an output shaft,
8. The pump according to claim 7, wherein the rotation shaft is a main shaft of the pump.

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