JP4651683B2 - Motor shaft of vertical shaft pump - Google Patents

Description

  The present invention relates to a motor frame for a vertical shaft pump.

  The main shaft of the vertical pump extends upward through the top of the pump casing. In order to connect the main shaft of the vertical shaft and the output shaft of the prime mover, there is known a prime mover mount in which the prime mover is disposed above the pump casing of the vertical shaft with the output shaft extending downward.

  Patent Document 1 includes a base member that is mounted on the pump installation floor, and a mounting member that is positioned above the base member and on which a prime mover is mounted, and means for attaching both ends of the turnbuckle to the base member and the mounting member. A prime mover mount provided is disclosed. Resonance is prevented by adjusting the dynamic rigidity of the motor base by tightening the turnbuckle.

  However, the motor frame disclosed in Patent Document 1 has a problem that the degree of freedom in adjusting the dynamic rigidity is low because the fixed position of the turnbuckle relative to the base member and the mounting member is determined. In addition, it is said that the tension of the turnbuckle acts on the prime mover base in the direction in which the mounting member approaches the foundation member, that is, the direction opposite to the direction in which the weight of the prime mover is supported (the direction in which the strength of the prime mover base is reduced). There was a problem.

Japanese Patent Publication No. 2-40880

  It is an object of the present invention to provide a prime mover mount for a vertical shaft pump that can realize dynamic rigidity adjustment with a high degree of freedom while ensuring sufficient strength.

  As means for solving the above problems, a vertical shaft prime mover according to the present invention includes a base member that is mounted on a pump installation floor, a mounting member that is positioned above the foundation member and on which the vertical shaft prime mover is mounted, The lower end is fixed to the base member, while the upper end is fixed to the mounting member, and the lower end is detachable to the base member, while the upper end is detachable to the mounting member, And at least one adjustment column that can be expanded and contracted.

  Specifically, the base member includes a lower receiving portion provided on an upper surface side so as to connect positions where the lower ends of the plurality of fixed columns are fixed, and the mounting member is disposed on the lower surface side. An upper receiving portion provided so as to connect the positions where the upper ends of the plurality of fixed columns are fixed, and the adjustment column is removably locked to the lower receiving portion on the lower end side. And a lower fixing mechanism that releasably fixes the lower locking portion in a state where the lower locking portion is locked to the lower receiving portion, and the upper receiving portion is provided on the upper end side. It is desirable to include an upper locking portion that is detachably locked to the upper locking mechanism, and an upper fixing mechanism that releasably fixes the upper locking portion while being locked to the upper receiving portion.

  The lower end side of the adjustment column can be removably fixed by the lower fixing mechanism by detachably locking the lower locking portion to the lower receiving portion of the base member. On the other hand, the upper end side of the adjustment column can be releasably fixed by the upper fixing mechanism by locking the upper locking portion to the upper receiving portion of the mounting member with a detachable function. Moreover, the lower side receiving part of the base member and the upper side receiving part of the mounting member are continuously provided so as to connect the positions where the upper and lower ends of the fixed column are fixed. Therefore, an arbitrary number of adjustment columns can be fixed at an arbitrary position between the fixed columns, and the once-adjusted adjustment columns can be removed, and the degree of freedom in adjusting dynamic rigidity is high. Also, the dynamic rigidity can be adjusted by extending and contracting the adjusting column. For example, if resonance occurs after the installation of the vertical shaft pump, simply change the number of adjusting columns to be fixed, the fixing positions of the individual adjusting columns, and the degree of expansion / contraction of the individual adjusting columns. Without reassembling, the dynamic rigidity of the prime mover base can be finely adjusted over a wide range to eliminate resonance. Further, even when resonance occurs during cutting of the base member or the mounting member and chatter of the cutting tool due to the resonance, the dynamic rigidity is finely adjusted over a wide range to eliminate the resonance and chatter due to the vibration. Since the adjusting column has a function of supporting the weight of the prime mover mounted on the mounting member in the same manner as the fixed column, the strength of the prime mover base does not decrease due to the adjustment of the dynamic rigidity.

  Moreover, it is desirable that the adjusting column includes a jack portion that can be expanded and contracted.

  With this configuration, the force applied to both ends of the adjustment column can be adjusted by expansion and contraction of the adjustment column jack portion. Specifically, as the jack portion is extended, the force in the direction of separating the mounting member from the base member is increased, the dynamic rigidity can be adjusted, and the force with which the prime mover base supports the weight of the prime mover is improved.

  The motor stand of the vertical shaft pump according to the present invention is provided with a telescopic adjustment column that can be detachably fixed at an arbitrary position between the fixed columns in addition to the fixed column, so that it is possible to realize adjustment of dynamic rigidity with a high degree of freedom. . As a result, it is possible to easily and reliably eliminate the resonance that occurs after the installation of the vertical shaft pump, the resonance during cutting of the base member and the mounting member, and the chatter of the cutting tool resulting therefrom. Further, since the adjusting column has a function of supporting the weight of the prime mover together with the fixed column, the prime mover base can secure sufficient strength.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 shows a prime mover base 1 of a vertical shaft pump according to an embodiment of the present invention. The prime mover mount 1 is for mounting a prime mover 3 that drives a vertical shaft pump 2, and is installed on a base plate 4 on a pump installation floor 5. The vertical shaft pump 2 includes a pump casing 8 extending in a substantially vertical direction, and a main shaft 6 extending in the vertical direction is disposed in the pump casing 8. The output shaft 22 of the prime mover 3 is connected to the upper end of the main shaft 6 protruding upward from the pump casing 8 via a coupling 23.

  Referring to FIGS. 2, 3, and 4, the motor frame 1 includes a base member 10, a mounting member 11, a plurality (five in the present embodiment) of fixed columns 12, and an adjustment column 13. 2 and 3, only one adjusting column 13 is shown, but the number of adjusting columns 13 is arbitrary as shown in FIG.

  The base member 10 in the present embodiment is an annular belt-shaped steel material (for example, SS400) in which an opening 14 having a predetermined angle (60 degrees) is formed. As apparent from FIG. 2, when the vertical shaft 2 is lowered from the upper portion of the vertical pump 2 toward the base plate 4, the opening portion 14 is provided with a vent between the base member 10 and the pump casing 8. It is provided to avoid interference with the part.

  On the upper surface of the base member 10, a lower guide rail (lower receiving portion) 15 is continuously provided so as to connect positions where the lower ends of the plurality of fixed pillars 12 are fixed except for the opening portion 14. Yes. The cross section of the lower guide rail 15 is a quadrangle. The outer periphery of the lower guide rail 15 is welded to the upper surface of the foundation member 10. The lower guide rail 15 is provided to fix the lower ends of the fixed column 12 and the adjusting column 13 as will be described later, but also functions as a rib that reinforces the base member 10.

  A total of ten holes 16 are provided outside the lower guide rail 15 at intervals of 30 degrees in the circumferential direction except for the opening 14. The base member 10 is fastened to the base plate 4 by bolts (not shown) inserted through the holes 16.

  The mounting member 11 in this embodiment is an annular belt-shaped steel material (for example, SS400). On the lower surface of the mounting member 11, an upper guide rail (upper receiving portion) 17 is continuously provided in an arc shape so as to connect positions where the upper ends of the plurality of fixed columns 12 are fixed. The cross section of the upper guide rail 17 is a quadrangle. The outer periphery of the upper guide rail 17 is welded to the lower surface of the mounting member 11. The upper guide rail 17 is provided to fix the upper ends of the fixed column 12 and the adjustment column 13 as will be described later, but also functions as a rib that reinforces the mounting member 11.

  A total of four screw holes 18 are provided outside the guide rail 17 at intervals of 90 degrees in the circumferential direction. These screw holes 18 are used for fastening an eyebolt (not shown) for lifting the motor base. A flange portion 19 is provided on the upper surface of the mounting member 11. The flange portion 19 is provided with a total of four screw holes 28 at positions corresponding to the fastening holes 20 on the prime mover 3 side. The prime mover 3 is fastened to the mounting member 11 by means of bolts (not shown) inserted through the fastening holes 20 and these holes 28. Outside the flange portion 19, jack seats 21 are provided in four directions at intervals of 90 degrees. The jack seat 21 is for fixing a jack (not shown) for raising and lowering the prime mover 3 when connecting the output shaft 22 of the prime mover 3 to the pump main shaft 6.

  The fixed column 12 in the present embodiment is a square steel pipe (for example, SS400) having a square cross section. Referring to FIG. 1, a notch 32 having a shape matching the cross section of the upper guide rail 17 of the mounting member 11 is formed at the upper end of the fixed column 12, and a cross section of the lower guide rail 15 of the base member 10 at the lower end. A notch 33 having a shape matching the above is formed. The fixed column 12 is welded with the upper end on the lower surface of the mounting member 11 and the lower end on the upper surface of the base member 10 with the notches 32 and 33 fitted into the upper and lower guide rails 17 and 15, respectively. Fix it. In this embodiment, the posture of the fixed column 12 fixed to the mounting member 11 and the base member 10 is 10 with respect to the vertical direction so that the upper end side faces the center of the motor mount 1 and the lower end side faces away from the center. It is inclined about a degree.

  FIG. 5 is a detailed view of the adjustment column 13 of the motor mount 1 according to the present embodiment. The adjustment column 13 in the present embodiment is a square steel pipe (SS400) having a square cross section, and includes a jack portion 40 in the vicinity of the upper end.

  A cutout portion (upper locking portion) 45 fitted into the upper guide rail 17 is formed at the upper end of the adjustment column 13, and a cutout portion (lower locking portion) 46 fitted into the lower guide rail 15 is formed at the lower end. Is formed. These cutout portions 45 and 46 have the same cross-sectional shape as the cutout portions 32 and 33 of the fixed column 12, but in order to be arbitrarily detachable, in both the vertical direction and the horizontal direction, the upper side and the lower side. The cross sections of the side guide rails 17 and 15 have a slight play respectively.

  A tap 47 is formed in the vicinity of the notch 45 at the upper end of the adjustment column 13. With the notch 45 fitted in the upper guide rail 17, the upper end of the adjustment column 13 is fixed to the upper guide rail 17 by screwing the bolt 51 into the tap 47 and pressing the tip of the bolt 51 against the upper guide rail 17. The tap 47 and the bolt 51 constitute an upper fixing mechanism in the present invention. A tap 48 is also formed in the vicinity of the notch 45 at the lower end of the adjustment column 13. With the notch 46 fitted in the lower guide rail 15, the bolt 52 is screwed into the tap 48 and the tip thereof is pressed against the lower guide rail 15, so that the lower end of the adjustment column 13 is moved to the lower guide rail 15. Fix it. The tap 48 and the bolt 52 constitute a lower fixing mechanism in the present invention.

  The jack part 40 includes a jack bolt 42 and two connection parts 43. The jack bolt 42 has a rotary holding portion 44 (in this embodiment, a hexagonal nut shape) for rotating the jack bolt 42 at substantially the center in the axial direction, and has a right screw at one end and a left screw at the other end. Has a screw. The two connecting portions 43 are solid metal pieces having a cross section that matches the cross sectional shape of the square steel pipe constituting the adjustment column 13, and are connected to the square steel pipe by welding. Inner screw threads corresponding to the jack bolts 42 are respectively formed in the two connection portions 43. Specifically, one connection portion 43 has a right-hand thread inner thread, and the other connection portion 43 has a left-hand thread inner thread. If the jacking bolt 42 is rotated in a certain direction by operating the rotary gripping part 44, the two connecting parts 43 engaged with both ends of the jacking bolt 42 move in a direction approaching or separating from each other, and as a result, The adjustment column 13 expands and contracts. That is, the adjusting column 13 expands and contracts according to the rotation direction of the jack bolt 42.

  If the adjustment column 13 is in a state of being contracted to some extent, the notches 45 and 46 can be fitted into the upper and lower guide rails 17 and 15. When the adjusting bolt 13 is extended by rotating the jack bolt 42 from this state, the upper end of the adjusting column 13 is brought into contact with the lower surface of the mounting member 11 to be locked to the upper guide rail 17, and the lower end of the adjusting column 13 is the base member. 10 is brought into contact with the upper surface of the lower guide rail 15. In this state, the upper and lower ends of the adjustment column 13 can be fixed to the upper and lower guide rails 17 and 15 by further screwing the bolts 51 and 52 into the taps 47 and 48. On the other hand, if the bolts 51 and 52 are loosened, the upper and lower ends of the adjustment column 13 can be fixed to the upper and lower guide rails 17 and 15. In this state, the notch portions 45 and 46 can be removed from the upper and lower guide rails 17 and 15 by rotating the jack bolts 42 of the jack portion 40 and contracting the adjustment column 13 to some extent. Thus, by operating the jack bolt 42 and the bolts 51 and 52, the adjustment column 13 can be attached to and detached from the upper and lower guide rails 17 and 15. Since the upper and lower guide rails 17 and 15 are continuously provided so as to connect the positions where the upper and lower ends of the fixed column 12 are fixed as described above, the adjustment column 13 includes the upper and lower guide rails 17 and 17. 15 can be fixed at an arbitrary position between the fixed columns 12.

  The force acting on both ends of the adjusting column 13 can be increased or decreased by the rotation of the jack bolt 42. FIG. 6 shows the force related to the adjustment column 13 in the present embodiment. 6 (a) to 6 (c) in which the adjusting column 13 is expanded and contracted, there is a relationship of L1 <L2 <L3 between the entire lengths L1, L2, and L3 of the adjusting column 13, but the base member 10 and the mounting member. Since five fixed pillars 12 are fixed to 11 by welding, the distance between the upper surface of the base member 10 and the lower surface of the mounting member 11 is constant. Since the adjustment column 13 also needs to be accommodated within a certain length, the compression force from the base member 10 and the mounting member 11 acts on both ends of the adjustment column 13. The reaction force acts on the base member 10 and the mounting member 11. P1, P2, and P3 in FIGS. 6A to 6C indicate reaction forces that act on the mounting member 11 from the adjustment column 13. The longer the total length of the adjusting column 13, the greater the reaction force, and the relationship of P3> P2> P1 is established in FIGS. 6D, the reaction forces P1 to P3 are opposite to the axial force P4 of the adjusting column 13 applied to the mounting member 11 due to the vibration of the prime mover 3. As shown in FIG. . Therefore, by adjusting the reaction forces P1 to P3 by the expansion and contraction of the adjustment column 13, the dynamic rigidity of the prime mover mount 1 on which the prime mover 3 is mounted can be changed.

  Next, installation of the motor mount 1 according to the present embodiment will be described. The prime mover base 1 is installed after the pump 2 is installed. Since the base member 10 has the opening 14, the prime mover base 1 can be lowered from above the pump 2 while avoiding interference with the bend of the pump casing 8. Since the base member 10 is provided with holes 16, bolts (not shown) are inserted into the holes 16 to fasten the motor mount 1 to the base plate 4 fixed to the pump installation floor 5. Thereafter, the prime mover 3 is mounted on the mounting member 11, and the output shaft 22 of the prime mover 3 is coupled to the main shaft 6 of the vertical pump 2 by the coupling 23.

  After the prime mover base 1 is installed, resonance may occur when the prime mover 3 is driven to experimentally operate the vertical shaft pump 2. However, an arbitrary number of adjustment pillars 13 can be fixed to the upper and lower guide rails 17 and 15 (the mounting member 11 and the base member 10), and the individual adjustment pillars 13 can be fixed to the upper and lower guide rails 17 and 15. On the other hand, it can be fixed at an arbitrary position between the fixed columns 12. Moreover, as described with reference to FIG. 6, the force acting on the mounting member 11 and the base member 10 from the adjustment column 13 can be arbitrarily adjusted. Therefore, by adjusting the adjustment elements, that is, the number of adjustment columns 13 to be fixed, the fixing positions of the individual adjustment columns 13, and the force applied from the adjustment columns 13 to the mounting member 11 and the base member 10, Without disassembling and reassembling the prime mover 3, the dynamic rigidity of the prime mover base 1 can be finely adjusted over a wide range to eliminate resonance. Further, since the adjusting column 13 has a function of supporting the weight of the motor 3 mounted on the mounting member 11 in the same manner as the fixed column 12, the rigidity of the motor base 1 is not lowered for adjusting the dynamic rigidity. . Furthermore, the strength of the motor frame 1 can be increased by adding the adjustment column 13.

  Next, the assembly of the motor frame 1 according to the present embodiment will be described. The assembly of the motor frame 1 is performed by placing the base member 10 on the floor, hanging down the mounting member 11 with a crane or the like, inserting the fixed column 12 between the two members, positioning, and welding. After this step, the lower surface of the base member 10 and the flange portion 19 of the mounting member 11 are cut. When the base member 10 and the mounting member 11 are cut, resonance of the motor base 1 and chattering of the cutting tool due to the resonance may occur. However, in this case as well, the dynamic rigidity of the motor base 1 is adjusted in a fine and wide range by adjusting the number of adjustment columns 13 to be fixed, the fixing positions of the individual adjustment columns 13, and the force applied from the adjustment columns 13 to the mounting member 11. The chatter can be reduced or eliminated by adjusting to. It is effective to add the adjusting column 13 to a place where chatter is most intense.

  The present invention is not limited to the embodiments described above, and various modifications are possible. For example, as shown in FIGS. 7, 8, and 9, the jack portion 40 of the adjustment column 13 includes a screw portion 62 at the tip of the upper column 60 and the lower column 61, and each screw portion is connected by a nut portion 63. May be. Also in this case, one screw portion is a right screw and the other screw portion is a left screw, and a right screw and a left screw are provided on the inner side so as to correspond to the nut portion 63 to be connected. In addition, the protrusions 65 may be provided at both ends of the adjustment column 13, and the adjustment column 13 may be fixed so as to engage with the annular band-shaped concave portions 66 respectively provided in the base member 10 and the mounting member 11. Moreover, the structure which provides the notch parts 45 and 46 in the one end of the adjustment pillar 13, and the projection part 65 in the other end may be sufficient. Further, the adjustment column 13 including the damper portion 70 may absorb vibration and avoid resonance.

The front view which shows the installation state of the motor | power_engine mount of the vertical shaft pump concerning embodiment of this invention. The top view which shows a motor | power_engine frame. The front view which shows a motor | power_engine mount. The front view of the motor | power_engine mount for demonstrating addition of an adjustment pillar. The partial front view which shows the detail of the adjustment pillar of a motor | power_engine frame. (A) is a figure which shows the force which the adjustment pillar shortened from reference length exerts on a mounting member, (b) is a figure which shows the force which the adjustment pillar used as a reference exerts on a mounting member, (c) is extended from reference length The figure which shows the force which the adjustment pillar currently performed exerts on a mounting member, (d) is the figure which shows the force which a motor | power_engine (mounting member) exerts on an adjustment pillar. The partial front view which shows the modification of this invention. The partial front view which shows the modification of this invention. The front view which shows the modification of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Prime mover stand 2 Vertical shaft pump 3 Prime mover 4 Base plate 5 Pump installation floor 6 Main shaft 7 Impeller 8 Pump casing 10 Base member 11 Mounting member 12 Fixed pillar 13 Adjustment pillar 14 Opening part 15 Lower guide rail 16 Hole 17 Upper guide rail 18 Screw hole 19 Flange part 21 Jack seat 22 Output shaft 23 Coupling 28 Screw hole 32, 33, 45, 46 Notch part 40 Jack part 42 Jack bolt 43 Connection part 44 Rotary holding part 47, 48 Tap 51, 52 Bolt 60 Upper pillar 61 Lower pillar 62 Screw part 63 Nut part 65 Projection part 66 Concave part 70 Damper part

Claims (3)

A foundation member to be mounted on the pump installation floor;
A mounting member that is located above the foundation member and on which the motor of the vertical shaft pump is mounted;
A plurality of fixed columns whose lower ends are fixed to the foundation member, and whose upper ends are fixed to the mounting member;
A motor stand for a vertical shaft pump, comprising: at least one adjustment column having a lower end detachable from the base member and an upper end detachable from the mounting member. The base member includes a lower receiving portion provided on an upper surface side so as to connect positions where the lower ends of the plurality of fixed columns are fixed,
The mounting member includes, on the lower surface side, an upper receiving portion provided so as to connect a position where the upper ends of the plurality of fixed columns are fixed,
The adjustment column is released at the lower end side in a state in which the lower locking portion is detachably locked to the lower receiving portion, and the lower locking portion is locked to the lower receiving portion. An upper locking portion that is detachably locked to the upper receiving portion, and the upper locking portion is locked to the upper receiving portion. The prime mover mount according to claim 1, further comprising an upper fixing mechanism for releasably fixing in a state where the motor is released.   The motor frame according to claim 1, wherein the adjustment column includes a telescopic jack portion.

Images