JPS5925888B2 - How to install bearing hardware - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for mounting a bearing hardware having a journal bearing portion for supporting a rotating shaft such as a rudder shaft of a ship onto a mounting base by aligning the rotating shaft and the bearing hardware. It is related to.

Conventionally, when centering the upper bearing part of the rudder axle of a ship with respect to a rotating shaft such as a rudder axle of a bearing hardware, there is a gap between the outer periphery of the journal part of the rotating shaft and the inner periphery of the journal bearing part of the bearing hardware. Insert the feeler gauge into the annular gap that is formed,
The centering method used was to measure the gaps at multiple locations around the journal, correct the position (center) of the bearing hardware, and then repeat the same operation.

However, when centering is performed using the method described above,
The problem is that the work of measuring the gap and correcting the position has to be repeated many times, and even then, it is difficult to completely equalize the gap around the entire circumference of the journal part, resulting in poor work efficiency. The point was hot. The present invention has been made in consideration of the above-mentioned problems, and uses a centering jig to improve the accuracy of the rotating shaft when attaching a bearing hardware having a journal bearing portion that supports the rotating shaft to a mounting base. It is an object of the present invention to provide a method for attaching bearing hardware that allows easy centering of the bearing hardware.

First, the structure of a rotating shaft such as a rudder shaft to which the present invention is applied will be explained. In FIGS. 1 to 3, reference numeral 1 indicates an upper bearing hardware mount fixed to the deck of a ship, etc.
This upper bearing hardware mount 1 includes a fixing base 3 having a through hole 2 in the center, a fixing base 3 fixed on the fixing base 3, a through hole 4 having a slightly larger diameter communicating with the through hole 2 in the center, and an upper part. and a spherical seat 6 having a spherical (hemispherical) convex surface 5.

7 is a rotating shaft (
(hereinafter referred to as the rudder shaft).

A sleeve 9 forming a journal portion 8 is attached to the rudder shaft 7.
is fixed. Reference numeral 10 denotes a metal bearing that is placed on the spherical seat 6 and integrally fixed to the fixed base 3 together with the spherical seat 6 by bolts 11 and nuts 12, and supports the rudder shaft 7.

This bearing hardware 10 includes an outer cylinder part 14 having a spherical (hemispherical) concave surface 13 downwardly matching the spherical convex surface 5, and a journal part 8 that is tightly fixed to the inner circumferential surface 15 of the outer cylinder part 14. and a bearing metal part 17 forming a journal bearing part 16 corresponding to the bearing metal part 17, and the length 11 of this bearing metal part 17 is formed to be shorter than the axial length 12 of the inner circumferential surface 15 of the outer cylinder part 14. ing. That is, in FIG. 1, the upper end surface 18 of the bearing metal part 17 is the upper end surface 1 of the outer cylinder part 14.
It is below 9. The packing 21 is inserted by the upper end surface 18, the inner circumferential surface 15 of the outer cylinder part 14, and the outer circumferential surface 20 of the sleeve 9 (or the rudder axle itself in the case of a rudder axle to which the sleeve 9 is not fixed). An annular groove 22 is formed for this purpose.

Further, 23 indicates the upper bearing hardware mounting base 1 for the bearing hardware 10.
It is a flexible cover that covers the butt portions of the two when fixed to each other, and the upper and lower inner circumferential portions are formed by the annular groove 10b on the outer periphery of the lower flange 10a of the bearing hardware 10 and the annular groove on the outer periphery of the spherical seat 6. 6a, respectively.

24 is an O-ring fitted into an annular groove 6b formed on the upper surface of the spherical seat 6.

The bearing hardware 10 has a width W1 of the annular groove portion 22;
The outer peripheral surface 20 of the sleeve 9 and the inner peripheral surface 2 of the bearing metal part 17
It is centered with respect to the rudder shaft 7 and then fixed to the upper bearing hardware mount 1 so that the width W2 of the annular gap e formed by Ru. Next, 26 is an example of a centering jig used to carry out this invention.

This centering jig 26 is formed in a shape having a collar portion 28 at the upper end of the cylindrical portion 27 as shown in FIGS. for,
A plurality of grooves 31 and 32 are formed along the axial direction at appropriate intervals in the circumferential direction, and the groove 31 on the inner circumferential surface 29 is located between the grooves 32 on the outer circumferential surface 30. Holding members 33 and 34 formed of lubricating oil-containing resin are fixed to the grooves 31 and 32 with their surfaces 35 and 36 slightly protruding concentrically from the inner circumferential surface 29 and outer circumferential surface 30, respectively. ing. Note that the holding member 33,
Diameter D of the circle circumscribing and inscribing the surfaces 35 and 36 of 34
1 and D2 are approximately equal to the diameter of the outer circumferential surface 20 of the sleeve 9 and the diameter of the inner circumferential surface 15 of the outer cylindrical portion 14 of the bearing hardware 10, respectively.

The centering jig 26 is actually divided into two pieces, and is detachably attached to the rotating shaft 10. Further, the collar portion 28 is provided with a plurality of female threaded portions 38 for the extraction bolts 37.

Hereinafter, the bearing hardware 10 when the bearing hardware 10 is attached to the upper bearing hardware mounting base 1 using the centering jig 26 will be explained.
This section describes how to perform centering. As shown in FIG. 1, in advance, the rudder shaft 7 is passed through the upper hardware mounting base 1, and the bearing hardware 10 is fitted onto the rudder shaft 7, and the spherical concave surface 13 of the bearing hardware 10 is attached to the upper bearing hardware mounting base. It is kept in a state where it is superimposed on the spherical convex surface 5 of No. 1.

Note that the rudder axle 7 is held in a lower bearing such that the rudder axle 7 is directed to a predetermined position below (not shown). Next, the cylindrical portion 27 of the centering jig 26 is pushed into the annular groove 22 into which the packing 21 is inserted. By this operation, the plurality of holding members 33 provided on the inner circumferential surface 29 of the cylindrical portion 27 come into close contact with the outer circumferential surface 20 of the sleeve 9, and the plurality of holding members 33 provided on the outer circumferential surface 30 of the cylindrical portion 27 come into close contact with the outer circumferential surface 20 of the sleeve 9. In order for the holding member 34 to hold the inner peripheral surface 15 of the bearing hardware 10, the bearing hardware 1
0 is the center of the spherical convex surface 5 along the spherical convex surface 5 (this is
Usually, it moves in an arc around a lower bearing (not shown) that pivotally supports the lower part of the rudder shaft 7, and the spherical seat 6
If it is not fixed to the fixed base 3, it moves horizontally along the fixed base 3 together with the spherical seat 6, and the bearing hardware 10 is centered with respect to the rudder shaft 7. After the upper hardware 10 has been centered in this way, the bearing hardware 10 is fixed to the upper bearing hardware mounting base 1 using the bolt opening 1 and the nut 12, and then the extraction bolt 37 is screwed in. Then, pull out the centering jig 26 from the annular groove 22,
When the packing 21 is inserted into the annular groove 22 and pressed with the gland 40 attached to the bearing hardware 10 with bolts 39, the installation work of the bearing hardware 10 is completed. In addition,
Since holding members 33 and 34 made of lubricating oil-containing resin are used at the locations where the centering jig 26 contacts the sleeve 9 and the bearing hardware 10, the centering jig 26
can be inserted and removed smoothly, and only requires a small amount of force.

In the above embodiment, the present invention is applied to the case of attaching a bearing metal fitting to a rudder shaft of a ship, but the present invention is not limited to this, but can also be applied to the attachment of a bearing metal fitting to a rotating shaft of other devices and machinery. It is applicable. As explained above, in the mounting method of the bearing metal fitting according to the present invention, the core has a cylindrical part whose inner periphery is the diameter of the outer periphery of the rotating shaft and whose outer periphery is the diameter of the inner periphery of the outer cylindrical part of the bearing metal part. Since the centering of the bearing hardware with respect to the rotating shaft is performed using a centering jig, the centering of the bearing hardware and fixing it to the mounting base can be done easily and accurately, significantly improving work efficiency. There are other effects.

Furthermore, the bearing hardware 10 is placed on the spherical seat 6 by overlapping the hemispherical convex surface 5 and the hemispherical concave surface 13 of the spherical seat 6.
Since the centering jig 26 is pushed into the annular groove 22 while being free to move in an arc of 0, the bearing hardware 10 is fixed with its center correctly aligned with the center of the rotating shaft 7. Further, a plurality of holding members 33 and 34 made of synthetic resin or a material having the same effect on the circumferential surfaces 29 and 30 have surfaces 35 and 36 that protrude beyond the circumferential surfaces 29 and 30 of the cylindrical portion 27. The cylinder part 27 of the centering jig 26, which is provided in the axial direction of the cylinder part 27 at appropriate intervals in the circumferential direction, is pushed into the annular groove part 22, and the holding members 33, 34 is made of synthetic resin (or a material with the same effect), and unlike metal, it has some elasticity and deforms with a relatively small force. In addition to being easy to take out, the holding members 33 and 34 can be replaced to accommodate other vessels having grooves with slightly different dimensions.

[Brief explanation of the drawing]

Figures 1 to 3 show the procedure for carrying out the present invention. Figure 1 is a cross-sectional explanatory view of the preparation stage, Figure 2 is a cross-sectional explanatory view during centering work, and Figure 3 is a cross-sectional view of the centering process. FIG. 4, a cross-sectional explanatory view when the centering work is completed, shows an embodiment of the centering jig used to carry out the present invention, and FIG.
4B is a sectional front view, and FIG. 4B is a bottom view. 1... Upper bearing hardware mounting base, 7... Rotating shaft (rudder shaft), 9... Sleeve, 10...
... Bearing hardware, 14 ... Outer cylinder part, 20 ...
...Outer peripheral surface, 22... Annular groove, 26...
...Centering jig, 27...Cylinder part, 28...
...Brim portion, 29...Inner peripheral surface, 30...
...Outer peripheral surface, 33, 34... Holding member, 35,
36...Surface.

Claims (1)

[Claims] 1 The rotating shaft 7 rotatably supported in the circumferential direction is inserted into the through hole 4
The inner circumferential surface 15 of the outer cylindrical portion 14, which is placed on the fixed base 3 and whose upper surface is formed as a hemispherical convex surface 5, is placed on the spherical seat 6, and whose lower surface is formed as a hemispherical concave surface 13. The bearing metal part 10 with the bearing metal part 17 attached thereto is attached to the hemispherical concave surface 13.
is placed in contact with the hemispherical convex surface 5 of the spherical seat 6, and the outer peripheral surface 20 of the rotating shaft 7 side and the inner peripheral surface 15 of the outer cylinder part 14 of the bearing metal part 10 are placed above the bearing metal part 17. In the formed annular groove 22, a plurality of holding members 33, 34 made of synthetic resin or a material having the same effect are attached to the circumferential surfaces 29, 30 of the cylindrical portion 27, and the surfaces 35, 36 are attached to the circumferential surfaces 29, 30 of the cylindrical portion 27. 2
A centering jig 26 protruding from 9 and 30 and provided in the axial direction of the cylindrical portion 27 at an appropriate interval in the circumferential direction of the cylindrical portion 27
Push in the cylindrical part 27 and move the bearing hardware 10 in an arc along the hemispherical convex surface 5 of the spherical seat 6 to center the bearing hardware 10 with respect to the rotating shaft 7. are fixed together with the bolts 11 and nuts 12, and then the extraction bolts 37 are screwed into the internal threads 38 formed on the collar 28 of the centering jig 26, and the centering jig 26 is removed from the groove 22. A method for attaching a bearing hardware, which is characterized in that it is removed, and finally a packing 21 is packed in the groove 22 and pressed with a gland 40.