JP5974318B2 - Adjustment centering jig for rotating equipment and drive - Google Patents

Description

  The present invention is a technical field related to a jig for correcting the position of a driving machine in a centering operation of a rotating machine such as a pump and a fan and a driving machine such as a motor.

In a conventional centering operation of a rotating device and a drive machine, there is a method of using a centering jig (FIG. 1) that can correct the position of the drive machine installed on the drive machine base. In addition, equipment without such a jig may be used by manufacturing a similar jig and attaching it to the drive machine base by welding or the like.
In a device that does not have a centering jig as described above, there is a method of hitting with a metal or resin hammer (FIG. 2) and adjusting the position of the driving machine by the impact.

Many of the bases on which rotating equipment and drive machines are installed are not equipped with a moving tool for the driving machine. ing. (Fig. 4)
If it is difficult to correct the position, such as a large drive machine, it is often equipped with a centering jig, but for many small and medium-sized drive machines, the base is equipped with a centering jig. The position of the drive machine is being corrected by hammering.

The centering accuracy of the rotating device and the drive device has the accuracy recommended by the number of rotations of the rotating device. In the 1800 rpm class, the eccentricity and parallel accuracy (FIG. 3) is within 0.05 mm.
If the rotational speed is 3600 rpm class, the eccentricity and parallel accuracy are within 0.03 mm. The above numerical values are real values of centering accuracy measured with a dial gauge or the like.

  The installation position of the drive machine is moved to align with the rotating equipment, but the movement amount of the drive machine that is performed during fine adjustment requires fine position adjustment in units of 0.01 mm.

  To measure the centering accuracy of rotating equipment and drive machines, dial gauges, laser alignment measuring instruments, cylinder gauges (parallel accuracy measurement), and thickness gauges (parallel accuracy measurement) are used. The measurement is performed in units of 0.01 mm.

  Although rare, centering devices such as machining on the main body of the apparatus, machining on the base, modification of the equipment foundation, etc., as described in the prior art documents (JP-A-7-208685 and JP-A-8-289512), There are equipment and equipment equipped.

  JP-A-7-208685

  JP-A-8-289512

In Patent Document 1 and Patent Document 2, a large-scale machining or modification to a rotating device, a driving machine, or a foundation is required for attaching a centering jig (device).
It is difficult to equip existing operation equipment (equipment) with the above-mentioned centering jig (device) due to cost, time required for machine stoppage (construction period) and the like.
In addition, since there are differences in the sizes of bases, drive machines, etc., depending on the manufacturer, it is necessary to design and manufacture Patent Document 1, Patent Document 2, and other centering jigs (FIG. 1) that are suitable for each device. The compatibility of the take-out jig is low, and the use to equipment other than the compatible equipment is limited.

FIG. 1 shows a general conventional centering jig.
The centering jig of FIG. 1 has a centering jig 3 attached to a base 2 by welding. In FIG. 2, boring (drilling) is performed on the base 2, and a centering jig 4 is inserted and attached to the hole.
In addition, when mounting the centering jig of the drive machine to the base, the attachment of the jig 3 is generally adopted by welding, but the rotating device and the drive machine on the base are removed, or an appropriate and accurate grounding is adopted. Must be installed.
This is because there are concerns about electrical shorts due to welding because bearings and control devices such as bearings exist in the rotating equipment and the driving machine. If an electrical short occurs in the bearing, there is a high possibility that the bearing will be damaged and the equipment body will be damaged.
FIG. 4 is a reference when the centering jig is attached by welding, and the centering jig 9 is attached by electric welding 10. In this case, it is necessary to ground the fixing base 2 such as a driving machine so that the driving machine 8 and the rotating device 7 do not short-circuit.
In addition, when removing rotating equipment and drive devices to eliminate concerns about electrical shorts, work to remove parts such as piping connected to the rotating equipment and power cables of the drive occurs, resulting in excessive costs. .

FIG. 2 is an image of centering adjustment work by hitting with a hammer or the like.
In the centering operation of the rotating equipment and the drive machine, the center position is adjusted by moving the position of the drive machine with the metal hammer 6 or the resin hammer 6 or bar when the drive machine centering jig is not equipped on the base. It is a method to do.
When the centering adjustment is performed by hitting the hammer 6, a resin-made or lead-made hammer 5 is used in order to reduce damage to the driving machine.
In the fine adjustment operation for centering, since the moving amount of the driving machine is executed in units of 0.01 mm, it is very difficult to execute an appropriate moving amount by hammering.

  In the case of moving the position of the driving machine with the metal / resin hammer 6 or the bar, an operator having a high level of skill and skill is required in order to carry out an appropriate amount of movement.

  When the use of fire is strictly prohibited such as in chemical plants and oil plants, or when there is a limit to the use of fire due to the environment around the drive, use of a metal hammer that generates sparks or a post-centering jig (welding attachment) ) Is difficult to install.

When the metal hammer 6 is used to hit the drive machine, the hit part of the drive machine may be damaged.
In addition, when the hit portion of the driving machine or the hammer is damaged, there is a risk that the worker may be damaged due to the arrival of fragments and an occupational accident may occur.

  When hitting with a resin hammer to reduce damage due to hitting the driving machine, it is difficult to adjust the amount of movement because the impact of moving the driving machine is small compared to a metal hammer.

  A dial gauge or laser alignment measuring instrument is used to check the centering accuracy of the rotating equipment and the drive unit during the centering correction work, but it occurs when the drive unit is moved by hammering. The measured impact is transmitted to a measuring instrument such as a dial gauge, causing a measurement error and making it impossible to accurately grasp the centering accuracy.

The drive unit is fixed with bolts etc. to the existing screw holes for fixing the drive unit on the base through the insertion holes of the fixing bolts existing on the legs of the drive unit. The amount of position movement of the driving machine is limited by the contact of the bolt insertion hole of the driving machine.
However, when the driving machine is moved by the impact (impact) of a hammer or the like, it is difficult to understand whether the moving amount of the driving machine is the limit.
Thereby, the work time for correcting the centering accuracy becomes excessive. In addition, the fixing bolt is damaged, leading to damage to the equipment.

  Normally, the centering operation is performed by moving the position of the driving machine or the like. However, when the mounting position of the rotating device is defective, it is difficult or impossible to ensure the centering accuracy only by moving the position of the driving machine. In the method of moving the driving machine by hitting with a hammer or the like, it is difficult to find the position defect on the rotating device side at an early stage, and the centering work is excessively time-consuming and the cost is increased.

FIG. 5 is an image of a gap between the rotating device and the driving machine.
The shaft joint 26 (coupling) that connects the rotating device 7 and the drive unit 8 has recommended mounting accuracy, and the clearance between the rotating device side shaft joint and the drive unit side shaft joint is within ± 0.5 mm. Some models require accuracy.
In order to adjust the gap between the shaft joints, the drive unit is moved in the axial direction, but a device that is not equipped with a jig for moving the position of the drive unit or the like is often hit with a hammer.
When the gap between the devices is increased by hammering, since there are rotating devices and the like, it is difficult to realize an appropriate movement amount and a small amount of movement because the work space is narrow.
If operation is performed with an inappropriate distance between shaft joints, the shaft joint may be damaged or the shaft joint may be shortened.

  According to the first aspect of the present invention, it is possible to move the position of the drive unit or the like to a rod having a male screw or a female screw for mounting the drive unit or the like to a screw hole or the like for fixing the existing drive unit or the like to the device. A structure of a jack frame having jack bolts and the like, and a structure in which a hollow cylindrical coloring is interposed at a joint between the rod and the jack frame in order to freely change the direction of the jack frame, The outer diameter of the coloring is set by fitting the inner diameter of the jack frame and the clearance fit, and the inner diameter of the coloring is set by the outer diameter of the connecting position of the rod and the clearance fitting, and a circle around the rod. The direction of the jack frame is freely changed in the circumferential direction, the presser plate is fixed to the end surface screw hole of the rod part with a bolt, and the jack frame is fixed to an arbitrary position such as the drive machine. This is a centering jig that can move the drive machine in the left-right direction, the diagonal direction, and the axial direction, and is necessary for the installation of the centering jig, which is a problem of the conventional centering jig. Problems such as remodeling of the base of the drive machine, remodeling of the foundation of the equipment, remodeling of the main body of the equipment, etc. Solved.

  According to a second aspect of the present invention, the rod has a hollow cylindrical spacer ring for adjusting the installation height of the jack frame, and the inner diameter of the spacer ring is set by fitting the outer diameter of the coupling portion of the rod with a clearance fit. The centering jig according to claim 1, wherein the spacer ring is rearranged to change the position of the jack frame to a height suitable for the driving device or the like. Solved the problem that the jig could not be used due to the height of the legs of the drive machine, etc.

  The invention according to claim 3 is a variable structure in which the boss, the extension part, and the head can be coupled to the jack frame with a bolt, and a plurality of extension parts are attached between the boss and the head, 3. The centering jig according to claim 1 or 2, wherein the jack frame has a structure capable of changing a total length of the jack frame to a length suitable for the driving device or the like, and driving that has been a problem of a conventional centering jig. Solved the problem that jigs could not be used depending on the leg size of the machine.

The centering jig of the present invention can be moved in units of 0.01 mm by moving the position of the driving machine with a jack bolt provided in the centering jig.
As a result, the work time required for correcting the centering accuracy can be shortened.

  The centering jig of the present invention generates a pressure necessary to move the position of the driving machine by rotating the jack bolt with a wrench or the like, so it is simpler and easier than the position movement of the driving machine with a conventional hammer or bar. Work can be carried out.

  In the conventional work of moving the position of the drive machine with a hammer or bar, a skilled worker is required to realize an appropriate amount of movement, but the centering jig of the present invention is driven by the rotation work of the jack bolt equipped. Since the machine can be moved, skilled workers are not required.

The centering jig of the present invention uses a screw hole for fixing the driving machine on the existing base and installs the centering jig. No damage caused by electrical short.
Further, even in an environment where the use of fire is strictly prohibited or restricted, welding and machining for existing equipment are not required, so that the centering jig of the present invention can be installed.

Since the centering jig of the present invention does not require welding or processing to existing equipment for installation of the jig, it does not generate the burden of equipment modification to the equipment owner and the cost of the centering jig installation cost.
In addition, since the centering jig is installed using the screw holes for fixing the driving machine on the existing base, the jig can be installed easily and quickly.
In addition, it can be mounted on a base or equipment that has a structure with screw holes for fixing the drive, such as a drive fixed to the base (horizontal or vertical) and a drive fixed to the equipment. .

  The centering jig of the present invention has a function of adjusting the height, length and direction of the jig adapted to the shape of the leg of the driving machine, and is not limited by the shape of the leg of the driving machine or the like.

  Since the centering jig of the present invention moves the position of the driving machine etc. with the jack bolts equipped, it prevents or reduces the damage to the equipment that is concerned by the position moving method of the driving machine due to the impact (impact) of a hammer or the like. .

  Since the centering jig of the present invention moves the position of the driving machine etc. with the jack bolts to be equipped, it prevents the driving machine and the hammer body from flying out of the machine, which are likely to occur due to the impact (impact) of the hammer etc. Reduce the risk of occupational accidents.

  Since the centering jig of the present invention moves the position of the driving machine etc. with the jack bolts equipped, it prevents the occurrence of sparks that may occur due to the impact (impact) of a hammer or the like, and strictly prohibits or limits fire. Can be used in environments with

  The centering jig according to the present invention uses a screw hole for fixing the driving machine on the existing base, and installs the centering jig so that the area required for the position movement of the driving machine is small, and the work place is provided with a plurality of facilities. However, the centering operation can be easily performed in a narrow place.

Since the centering jig of the present invention is installed using the screw holes for fixing the driving machine on the existing base, the position moving direction of the driving machine can be freely set in all directions.
As a result, adjustment between the shaft joint gap of the rotary device and the drive machine and correction of parallel accuracy in the horizontal direction between the shaft joint surfaces can be easily performed.
Moreover, the direction of the centering jig can be carried out easily and quickly by loosening the presser plate.

  Since the centering jig of the present invention performs the position movement with the jack bolt equipped in the centering jig, the impact and vibration that cause an error in the measuring instrument become minute, and the driving machine etc. during the centering work Accurate measurement values can be obtained by reducing movement measurement errors.

Since the centering jig of the present invention uses a screw hole for fixing the driving base of the existing base and installs the centering jig, it is possible to easily detect the movement limit that occurs when the position of the prime mover or the like is moved.
As a result, it can be detected that the position of the rotating machine needs to be moved, and the centering operation time can be reduced.

  Conventional centering jig image (welded structure / pin structure)   How to move the position of the drive using a hammer   Image of centering accuracy of rotating equipment and drive (eccentric / parallel)   Installation image of post-centering jig by welding   Image of distance required between shafts of rotating equipment and drive   Installation image on centering jig and drive base (horizontal and vertical)   Image of connecting rod and jack frame of centering jig   Adjusting image of jack frame height of centering jig   Image of adjusting the clearance between coupling surfaces using a centering jig   Jack frame structure image of centering jig   Image of protector plate for protection of driving machine etc.   Installation image of the centering jig according to the moving direction of the driving machine etc.   Installation image of the centering jig according to the moving direction of the driving machine etc.

  The present invention solves the problems of conventional centering work, and attaches a jig that enables a small amount or an appropriate amount of movement of the driving machine to a screw hole for fixing the driving machine that exists in the base. The purpose is to achieve the recommended appropriate centering accuracy easily and quickly.

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

FIG. 6 is an assembly structure diagram and installation image of the centering jig of the present invention.
The centering jig 1 is attached to the fixing screw hole of the existing driving machine or the like on the base 2 where the driving machine or the like is installed, and the centering operation is performed.
Moreover, it can be used on a vertical drive as well as a horizontal drive on the same principle.

FIG. 7 is an assembly diagram of the rod 12 and the jack frame (FIG. 10), which are the main parts of the centering jig.
To connect the rod 12 and the jack frame (FIG. 10), the coloring ring 18 is inserted into the boss hole of the jack frame, and the rod 12 is inserted into the inner diameter portion of the coloring ring 18.
The color ring 18 has a hollow cylindrical shape, and the outer diameter of the color ring 18 is manufactured according to JIS B0401-1995 with the inner diameter of the jack frame connecting portion and the gap fitting fitting. Gap fitting fit By making it according to JIS B0401-1995, the jack frame can be arbitrarily changed in the circumferential direction around the rod 12.
The jack frame is fixed after the respective parts are inserted by using the screw holes 19 in which the press plate 20 is provided with the rod 12 and fastening the press plate 20 with bolts to fix the jack frame.

The coloring ring 18 to be inserted into the jack frame (FIG. 10) is a part that can be used in one jack frame (FIG. 10) even with the rods 12 having different sizes. The outer diameter of the color ring 18 is the same dimension, and the inner diameter is the same as the outer diameter of each rod 12.
In consideration of the strength of the rod, the adaptation of the jack frame (FIG. 10) according to the size of the rod 12 has a range of use, and there are several types of jack frames (FIG. 10).
As an example, a jack frame (FIG. 10) that fits with a rod 12 diameter (M10 to M16), a jack frame (FIG. 10) that fits with a rod 12 diameter (M16 to M24), and a jack that fits with a rod 12 diameter (M24 to M36) In the frame (FIG. 10), the rod 12 diameter larger than M9 or smaller or M36, there is a jack frame suitable for each size.
This is because a jack frame (FIG. 10), which has a high production cost with this jig, is used with several types of rods because there are various sizes of fixing bolts such as a driving machine.

There are various screw standards provided for the rod 12. The compatible jack frame (FIG. 10) (such as millimeters and inches) is divided into similar dimensions with reference to the applicable usage range of the rod 12 diameter (mm).
The rod L includes a thing having a male screw and a thing having a female screw.

FIG. 8 is an image of jack frame height adjustment.
Depending on the manufacturer of the drive machine, there is a difference in the thickness of the leg part of the drive machine, so the number of spacer rings 21 or the thickness of the spacer ring 21 is changed so that the jack bolt 22 of the centering jig can be installed near the center of the leg part of the drive machine. Then, the jack frame (FIG. 10) is adjusted to a height suitable for the centering operation.
The spacer ring 21 is a hollow cylindrical type, and the inner diameter is manufactured according to JIS B0401-1995, which is a fit between the outer diameter of the rod part coupling portion and the gap fitting.

  The spacer ring 21 has a size suitable for each rod 12, and there is a spacer ring 21 having a different inner diameter, outer diameter, and thickness for each rod 12.

  Basically, the jack frame is adjusted with the spacer ring 21, but if adjustment is difficult only with the spacer ring 21, the screwing amount of the rod 12 inserted into the fixing screw hole of the drive unit base is adjusted, and the jack frame ( Adjust the height of FIG.

FIG. 10 is an image of a jack frame structure.
Depending on the manufacturer of the driving machine, there is a difference in the length from the fixing hole to the end of the leg of the driving machine, so that the jack bolt 22 of the centering jig can be installed on the end surface of the driving machine leg. The length of the expression jack frame 13 is changed and used.
The assembly-type jack frame 13 is composed of a head 14, an extension part 15, and a boss 16, and when the length of the jack frame needs to be changed, the extension part 15 is incorporated between the head 14 and the boss 16 to obtain a frame part. Fix with the connecting bolt 24 and change the jack frame to an appropriate length.
The integrated jack frame 17 is intended to reduce the strength of the frame or the manufacturing cost. The integrated jack frame 17 has the head 14, the extension part 15, and the boss 16 integrated with each other, and the length cannot be changed.
Although the length of the integrated type 17 cannot be changed, it is not necessary to connect the respective parts, so that strength can be expected from the assembly type M13.
In the case of a large drive machine that requires the strength of the centering jig, an integrated jack frame 17 having an appropriate length is manufactured and used in advance.
In addition, the integrated type 17 has a small number of parts and has a manufacturing cost superior to that of the assembly type. Therefore, the integrated jack frame 17 having a preset length may be manufactured and used.

FIG. 11 is an image of using a protector plate for protection such as a driving machine.
When the position of the driving machine or the like is moved by the centering jig A, the tip of the jack bolt 22 mounted on the centering jig 11 contacts the driving machine, and the contact portion of the driving machine is damaged by the rotational friction of the jack bolt 22. Therefore, the protector plate 23 is inserted between the drive machine and the jack bolt 22.
Note that the tip of the jack bolt 22 has a hemispherical projection shape, which reduces rotational friction between the protector plate 23 and the jack bolt 22.

  When it is difficult to use the jack bolt 22 or the protector plate 23 mounted on the centering jig 11 to the leg of the drive machine or the like by the manufacturer of the drive machine or the like, the shape of the protector plate 23 is changed to the leg part of the drive machine. Change (or manufacture) a suitable one.

12 and 13 are installation images of the centering jig according to the moving direction of the driving machine or the like.
In order to correct the centering accuracy of the rotating device and the driving machine, the position of the driving machine is moved, but the installation position of the centering jig 11 is changed depending on the moving direction of the driving machine.
FIG. 12 shows an installation position of the centering jig 11 when the driving machine or the like is moved in the same direction.
FIG. 13 shows an installation position of the centering jig 11 when the driving machine or the like is rotated about the equipment.
In addition, the screw holes for fixing other driving machines or the like where the centering jig 11 is not installed are inserted so that the bolts for fixing the driving machine are inserted so that the screw holes of the base and the holes of the driving machine legs are not greatly removed. Screw in temporarily.
The basic number of centering jigs 11 is set to two. However, in the case of the shape of a driving machine or the like, a vertical driving machine or the like, four or a necessary number of installations are performed.

FIG. 9 is an image of a method for adjusting a clearance between coupling surfaces using a centering jig.
In many cases, a shaft joint is used to connect the rotating device and the drive machine, and the distance (gap) between the shaft joints is defined by various shaft joints. Used as a jig to adjust the gap.
The centering jig installation image in FIG. 9 is a case where the gap between the rotating device and the driving machine is increased. When the gap between the rotating machine and the driving machine is reduced, the centering jig 11 is installed on the opposite side to form the gap. Used as a jig to adjust.

DESCRIPTION OF SYMBOLS 1 ... Leg part 2 of a drive machine etc .... Fixing base 3 of a drive machine etc .... Conventional welding installation type Centering jig 4 ... Conventional pin fixed type Centering jig 5 ... Hammer Hammer for hitting 6 ... Hammer for hitting 7 ... Rotary equipment, etc. 8 ... Drive, etc. 9 ... Retrofit centering jig 10 ... Welding (attachment) of retrofit centering jig
11 ・ ・ ・ Centering jig 12 ・ ・ ・ Rod 13 ・ ・ ・ Jack frame Assembling type (Head + Extension parts + Boss)
14 ・ ・ ・ Jack frame Head 15 ・ ・ ・ Jack frame extension part 16 ・ ・ ・ Jack frame boss 17 ・ ・ ・ Jack frame integrated type 18 ・ ・ ・ Color ring 19 ・ ・ ・ Rod end face screw hole 20 ・ ・ ・ Presser foot Plate 21 ... Jack frame height adjustment spacer ring 22 ... Jack bolt 23 ... Protector plate 24 ... Frame parts coupling bolt 25 ... Shaft joint (coupling)

Claims (3)

  There are jack bolts etc. that enable the position of the drive unit etc. to be moved to a rod with a male screw or a female screw to be attached to a base for mounting the drive unit etc. or a screw hole for fixing an existing drive unit etc. to the equipment. In order to change the direction of the jack frame freely, a structure in which a hollow cylindrical color ring is interposed at the joint between the rod and the jack frame, and the outer diameter of the color ring is a jack. Set the inner diameter of the frame coupling part and the gap fitting fit, and the inner diameter of the coloring ring is set by the outer diameter of the rod coupling part and the gap fitting fitting, and the direction of the jack frame in the circumferential direction around the rod The presser plate is fixed to the end face screw hole of the rod part with a bolt, and the jack frame is fixed at an arbitrary position of the driving machine, etc. Lateral direction, diagonal direction, centering jig that allows movement in the axial direction and the like.   The rod has a hollow cylindrical spacer ring for adjusting the installation height of the jack frame, and the inner diameter of the spacer ring is set by fitting the outer diameter of the coupling portion of the rod with a gap fit, the spacer ring The centering jig according to claim 1, wherein the jack frame has a structure in which the position of the jack frame can be changed to a height suitable for the driving device or the like.   The jack frame has a variable structure in which a boss, an extension part, and a head can be coupled with bolts. A plurality of extension parts are attached between the boss and the head, and the entire length of the jack frame is driven. The centering jig according to claim 1, wherein the centering jig has a structure that can be changed to a length suitable for a device or the like.

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