JPS60263722A - Method of preventing strain of strip in submerged bearing and lock metal - Google Patents

Abstract

PURPOSE:To prevent the occurrence of bimetal action due to a difference in thermal expansion with the other material, by a method wherein cuts in a shape in which the cut cuts the longitudinal direction of a material, are formed at intervals in the surface of the material brought into contact with the inner diameter part of the outer cylinder of a bearing. CONSTITUTION:A strip 2 is formed such that 3 materials, different in physical properties from each other, of resin fluoride 21, rubber 22, and bakelite 23 which are cut to widths, conforming to each other in the peripheral direction of the inner diameter part of the outer cylinder of a bearing, and to lengths, coinciding with each other in the direction of an axis, are laminated by a means, such as baking, to form the materials in a one-piece structure. Further, cuts 24, which are formed by a right-angles cutting B in a shape in that the cut cuts the longitudinal direction of a cloth-filled bakelite 23, are formed at intervals in the surface part of the cloth-filled bakelike 23 making contact with the inner diameter part of the outer cylinder of a bearing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for preventing distortion of a strip in a so-called underwater bearing, which supports a rotating shaft in a thin body (underwater) such as a ship or a punch, and a stopper.

[Jourai's technology] □ Generally, this type of urinary bearing is located around the area where the bearing itself is located. Liquid, water) 'i Lubricating oil □, 7 □ Ioea.

The most suitable bearing material for this purpose is lignum bike. However, this material has been on the verge of resource depletion in recent years. Therefore, rubber bearings and the like came to be used as an alternative to this lignum bike. However, the following bearing materials are most preferable for underwater bearings. In other words, this bearing material is made of tetrafluoride resin in the area where the rotating shaft slides, rubber is placed under this resin, and manned Bakelite is placed under this rubber in a laminated manner to prevent seizure. be integrated by means of It's under the thing. In this case, the tetrafluoride resin not only slides well on icebergs, but also has a small coefficient of friction, so it can drastically reduce tB wear due to sliding contact with the rotating shaft, and the second layer of rubber has flexibility on the bearing surface. In addition to making it easier to adapt to the rotating shaft, it also efficiently absorbs vibrations from the engine, propeller, etc. Furthermore, the third layer of manned heak light can be attached to the inner diameter of the bearing outer cylinder using a fastener, etc. In addition to obtaining a good antagonistic state, it has the advantage of being able to reinforce the upper two layers due to the hardness of the material.
It has been considered that the ideal underwater bearing is formed by the above-mentioned three-layer baked body. In addition, conventional fasteners fix the strip by combining a kind of wedge shaped like a drum in the longitudinal direction in opposite directions and pushing the strips in with the thrust of a screw.

[Problem that the invention seeks to solve]

However, the above-mentioned bearing materials and fasteners each have the following problems.

(1) In other words, the above-mentioned bearing material (strip) is made of three layers of materials with different thermal expansions, so the heat generated during processing and use causes a bimetallic effect, making continuous use difficult.

(2) Furthermore, the above-mentioned strip is constantly deformed due to changes in atmospheric temperature even during storage after manufacture, making it difficult to maintain its original shape.

(3) Furthermore, the stopper could not have an optimal structure to prevent deformation of the strip.

[Means for solving problems]

This invention is intended to solve each of the above problems. In other words, there are three types of materials with different physical properties (tetrafluoride resin,
When laminating materials (rubber, hard bakelite) to form a laminated structure, at least the surface of the material that contacts the inner diameter of the bearing outer cylinder (manned bakelite) is cut in a shape that divides the material in the longitudinal direction (e.g., right angle cut, staggered cut). Cuts (cuts made by cutting, diagonal cutting, etc.) that match the physical properties of the material were provided at intervals.

In addition, the fasteners for attaching the above-mentioned material (manned heaklite) to the inner diameter part of the bearing outer cylinder are arranged so that the expanded parts are arranged in a parallel connected manner at the bottom of both sides of the circular arc-shaped pressed part that has a screw hole. It was formed by

[Effect]

The above strip has at least a notch that divides the longitudinal direction of the manned heaklite that is in contact with the inner diameter of the bearing outer cylinder, so internal stress is released and distortion is less likely to occur. The bimetallic effect can be easily prevented. In addition, with the fastener, the thrust force of the screw into the screw hole section acts on the arc-shaped pressed section to flatten it through the widening action of the expanded section, so the strip is sometimes attached to the expanded section. The widening force at 2 acts as a pressing force against the pressed portion, suppressing deformation of the strip, and thereby allowing stable attachment.

〔Example〕

Embodiments of the present invention will be described above based on the accompanying drawings.

1 to 3 show a first embodiment of the method for preventing strip distortion in an underwater bearing according to the present invention.

The strip 2 in this first embodiment is a tetrafluoride resin 21 cut into a width that matches the circumferential direction of the inner diameter portion of the bearing outer cylinder 1 and a length that matches the axial direction. Three types of materials having different physical properties, such as rubber 22 and manned hakelite 23, are laminated together by baking or other means to form a single unit. In the surface portion of the manned bakelite 23 that is in contact with the inner diameter portion of the bearing outer cylinder 1, notches 24 made by right-angled cuts B having a shape that divide the major bakelite 23 in the longitudinal direction are provided at intervals. The depth of this right angle cut B is
Without being limited to the manned Hekelight 23 as described above,
It may be provided so as to reach the layer of rubber 22 if necessary.

As shown in FIG. 1, the strips 2 formed as described above are sequentially pasted in the circumferential direction with the contact surface of the manned heckleite 23 against the inner part of the bearing outer cylinder 1, Due to structural reasons in the production of the bearing outer cylinder 1, both groups of strips 2 for each of the two halves are separated into The bearing outer cylinder 1 is joined by the layered semicircular bodies to form a perfect circle, and the connected strips 2 are firmly attached by tightening them at key positions using fasteners 3, which will be described later. A set of submersible bearings A is constructed. In this case, the strip 2 according to the above is made by cutting the vendor Bakelite 23 individually with the cut 24 of the right angle cut B to a length of 11 iL in the longitudinal direction (if necessary, the cut 24 is made deep enough to reach the rubber 22 so that the longitudinal direction is 11 iL). Therefore, the deepest part of each cut 24 becomes a fulcrum 25, and the internal stress of the manned heaklite 23 is released individually between these fulcrums 25, thereby preventing the occurrence of strain during heating. It can be reduced smoothly and easily.

FIG. 4 shows a second embodiment of the method for preventing strip distortion in an underwater bearing according to the present invention. In this embodiment, parts that are common or equivalent to those of the previous embodiment are designated by the same reference numerals, and a description of the structure thereof will be partially omitted.

The strip 2 in this second embodiment is a strip for an underwater bearing formed in the same manner as in the first embodiment. Cuts 24 formed by zigzag cuts C that divide the longitudinal direction are provided at intervals. Also in this embodiment, the depth of the cuts 24 made by the staggered cutting C is as follows:
The number of layers is not limited to 3, and may be provided to reach the layer of rubber 22 as necessary.

As in the first embodiment, the strips 2 formed as described above are successively pasted in the circumferential direction with the contact surface of the manned Bakelite 23 against the inner diameter of the bearing outer cylinder 1 to form a set of underwater bearings A. In this case, each strip 2B is divided in the longitudinal direction by the notches 24 of the staggered cut C, so that each strip 2B is divided in the longitudinal direction by the notches 24 of the staggered cut C.
The deepest part of the manned Bakelite 23 becomes a fulcrum 25, and the internal stress of the manned Bakelite 23 is released individually between these fulcrums 25,
This makes it possible to smoothly and easily drastically reduce the occurrence of distortion during heating.

FIG. 5 shows a third embodiment of the method for preventing strip distortion in an underwater bearing according to the present invention. It should be noted that in this embodiment as well, parts common or equivalent to those in each of the above-described embodiments are designated by the same reference numerals, and a description of the structure thereof will be partially omitted.

The strip 2 in this third embodiment is a manned hakelight 2 in contact with the inner diameter part of the bearing outer cylinder 1 in a strip in an underwater bearing formed in the same manner as in each of the above embodiments.
Cuts 24 formed by diagonal cuts D that divide the manned Bakelite 23 in the longitudinal direction are provided at intervals on the surface portion 3. In this embodiment as well, the depth of the cut 24 made by the diagonal cut D is not limited to the manned heak light 23, and may be set so as to reach the layer of the rubber 22 as necessary.

When the strips 2 formed as described above are sequentially pasted in the circumferential direction with the contact surface of the manned Bakelite 23 against the inner diameter part of the bearing outer cylinder 1, as in each of the above embodiments, a set of underwater bearings A is constructed. , each strip 2 is divided in the longitudinal direction by a diagonal cut 24 by the manned heak light 23, so that in this embodiment as well, the deepest part of each cut 24 serves as a fulcrum 25, as in each of the above embodiments. The internal stress of the manned heckleite 23 is released individually for each fulcrum 25, thereby making it possible to smoothly and easily drastically reduce the occurrence of distortion during heating. - Figures 6- and 7 show the first embodiment of the strip stopper in the underwater bearing of the present invention.
0 The stopper 3 in this first embodiment is formed by bending an elastic metal plate with a predetermined thickness, and the pressed part 31 disposed on the upper surface has a length that matches the inner diameter of the bearing outer cylinder 1. It is formed into an arcuate cross-section with a width that can fit into the connecting portion between the two groups of strips 2 in the inner diameter portion. In the center band of the pressed part 31 in the longitudinal direction, there is a screw hole 33 with a seat into which a countersunk screw 4 used for fixing the fastener 3 to the inner diameter part of the bearing outer cylinder 1 can be screwed. are provided at positions at the same intervals that coincide with screw holes 12 that are inserted through the propulsion shaft 11 of the bearing outer cylinder 1 shown in FIG. 1 at intervals in the axial direction. Further, on both sides of the pressed portion 31, which are located below the pressed portion 31, are band-shaped expanded portions 32 having an elevational shape of a predetermined height.
are arranged so as to be parallel to each other in the longitudinal direction with both side edges extending downwardly. In this case, in the expanded portions 32 on both sides, the screw thrust of the countersunk screw 4, which will be described later, to the screw hole portion 33 is applied to the pressed portion 31 through the action of widening the expanded portions 32 in both directions. The cross section is bent into a substantially inverted V-shape so that the deformation pressure that transforms the original arcuate surface into a planar shape is applied downward, and the entire stopper R3 is formed as a unit.

With the above configuration, the stopper 3 in this first embodiment
As shown in FIGS. 1 and 6, both expanded portions 32 are inserted into grooves (not shown) that are pre-formed in the connecting portion between the two groups of strips 2 attached to the inner diameter of the bearing outer cylinder 1. The screw holes 1 are arranged in such a manner that their lower end edges fit into each other, and are penetrated through the propulsion shaft 11 of the bearing outer cylinder l.
2 to each screw hole 33 of the pressed part 31.
When it is screwed in and tightened, the expanded portion 32 of the stopper 3 causes a widening action outward in each field due to the screw thrust of the countersunk screw 4, and this widening action causes the pressed portion 31 to close to the bearing. A deforming pressure is applied toward the inner diameter portion of the outer cylinder 1 so that the previously arcuate shape becomes a flat surface. Therefore, the widening force E in the circumferential direction acts on the connecting portions of the two groups of strips 2, and the intervals between the groups become closer, and the radial pressing force F induced by the above widening force causes The degree of close contact with the inner diameter portion of the bearing outer cylinder 1 is increased, and deformation of each strip 2 can be suppressed.

FIG. 8 shows a second embodiment of the strip stopper for an underwater bearing according to the present invention. In this embodiment, parts common or equivalent to those in the previous embodiment are designated by the same reference numerals, and a description of the structure thereof will be partially omitted.

The stopper 3 in this second embodiment is a strip white metal fitting for an underwater bearing formed under the same conditions as in the first embodiment, and the pressed portion 31 has the same stiffness and width as described above. With this, folded edge surfaces are provided on both sides, and the surface portion between the edge surfaces is formed to have an arcuate cross section. In the center band of this pressed portion 31, seated screw holes 33 similar to those of the first embodiment are screwed at intervals in the longitudinal direction.

Further, on both sides of the pressed portion 31 located below, expanded portions 32 in which the folded edge surfaces on both sides are extended downward are arranged parallel to the longitudinal direction, and the overall cross section is approximately 8. It is formed into a letter shape.

In this case, in the expanded portions 3Z on both sides, as in the first embodiment, the screw thrust of the countersunk screw 4 against the screw hole portion 33 is
The cross section is bent into a substantially inverted eight shape so that a deforming pressure is applied to the pressed portion 31 so that the original arcuate surface becomes flat through the widening action of the expanded portion 32 in both directions.

With the above configuration, the stopper 3 in this second embodiment
Although not shown, when the countersunk screws 4 are screwed into each screw hole 33 of the pressed portion 31 after being arranged in the same manner as in the first embodiment, the screw thrust of the countersunk screws 4 causes the stopper to close. The expanded portion 32 of No. 3 causes a widening action outward in each column, and due to this widening action, the pressed portion 31 changes from an arcuate state to a planar state toward the inner diameter portion of the bearing outer cylinder l. As deformation pressure is applied each time, similarly to the first embodiment, a widening force E in the circumferential direction acts on the connecting portions of the two groups of IJ knobs 2, and the intervals between the groups are closely spaced. Moreover, the radial pressing force F induced by the above-mentioned widening force E increases the degree of adhesion to the inner diameter portion of the bearing outer cylinder 1, so that deformation of each strip 2 can be suppressed.

FIG. 9 shows a third embodiment of the strip stopper for an underwater bearing according to the present invention. It should be noted that in this embodiment as well, parts common or equivalent to those in each of the above-described embodiments are designated by the same reference numerals, and a description of the structure thereof will be partially omitted.

The stopper 3 in this third embodiment differs from the previous embodiments in that it is constructed by connecting three pipes. In other words, a single pipe serving as the pressed part 31 and an expanded part 32 made of two pipes of the same diameter on both sides below the pressed part 31 formed by this pipe are integrated through means such as welding at mutual contact positions. has been done. Then, on the circumferential surface immediately below the uppermost circumferential surface of the portion 31 to be pressed by the upper pipe, screw holes 33 into which the countersunk screws 4 described above can be screwed are threaded at intervals in the longitudinal direction. The stopper 3 has a cross section in which three pipes are arranged in an arc shape.

With the above configuration, the stopper 3 in this third embodiment
Although not shown, in the same way as in each of the embodiments described above, when is placed at the connecting part between the two groups of strips 2 and tightened by screwing the countersunk screw 4 into each screw hole 33 of the pressed part 31, Since the screw thrust of the countersunk screw 4 acts on the pressed portion 31 located at the top of the stopper 3, the expanded portions 32 on both sides are subjected to a strong widening force E in the circumferential direction due to this screw thrust. Using the mutually welded portions as fulcrums, an outward widening action is exerted on each column. Therefore, the above-mentioned widening force E in the circumferential direction acts on the connecting portions of the two groups of strips 2, and the intervals between the groups become closer.Furthermore, depending on the degree to which both expanded portions 32 cause the widening action, Since a strong pressing force F acts on the pressed portion 31 in the radial direction, this pressing force F increases the degree of close contact with the inner diameter portion of the bearing outer cylinder 1, thereby suppressing deformation of each strip 2.

〔Effect of the invention〕

As explained above, the present invention provides a material that is in contact with at least the inner diameter part of the bearing outer cylinder (the material that is in contact with the inner diameter part of the bearing outer cylinder) when three types of materials (tetrafluoride resin, rubber, and manned heaklite) having different physical properties are laminated together to form a layered structure. A cut in a shape that divides the material in the longitudinal direction (for example, a right angle cut or a staggered cut) is made on the surface of the material (for example, right angle cut or staggered cut).

The fasteners are made by making diagonal cuts (cuts that match the physical properties) at intervals, and attaching the above-mentioned material (high-grade Bakelite) to the inner diameter of the bearing outer cylinder. (1) The strip according to the present invention has at least a notch that divides the manned Bakelite in contact with the inner diameter of the bearing outer cylinder in the longitudinal direction. Since the internal stress is released, the generation of distortion is reduced, which reliably prevents the bimetallic action of the bearing material due to differences in thermal expansion, and allows the bearing to continue to operate smoothly underwater. It can be done easily.

(2) In addition, the above-mentioned strip prevents deformation and easily maintains its original shape even when exposed to changes in atmospheric temperature during storage after manufacture, thereby extending the durable life of the underwater bearing. .

(3) Furthermore, with fasteners, the thrust force of the screw against the screw hole applies strong deformation pressure to the pressed part through the widening action of the expanded part, so when attaching the strip, the widening force of the expanded part is sometimes applied. This has the effect of suppressing deformation of the strip by acting as a pressing force against the pressing portion, thereby allowing stable attachment.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts of an underwater bearing formed using a strip and a stopper according to the present invention, FIG. 2 is a perspective view of a strip formed according to a first embodiment of the strain prevention method according to the present invention, and FIG. 4 is a rear perspective view of the strip formed according to the second embodiment, FIG. 5 is a rear perspective view of the strip formed according to the third embodiment, and FIG. 6 is a rear perspective view of the strip formed according to the third embodiment. FIG. 7 is a perspective view of the operation of the stopper according to the first embodiment, and FIG. 8 is a perspective view of the operation of the stopper according to the second embodiment. , FIG. 9 is a perspective view of the operation of the stopper according to the third embodiment. 1... Bearing outer cylinder 2... Strip 3...
Stopper 4... Flat screw 21... Tetrafluoride resin
22... Rubber 23... Manned Bakelite 24... Notch 31... Pressed part 32...-
Expanded part 33... Screw hole part A... Underwater bearing
B... Right angle cut C... Staggered cut D... Diagonal cut E... Widening force F...: Pressure force Patent applicant Akira Uno Oka Makoto Kuchi Figure 2 Figure 3 Figure 4 Figure 3 Figure 5 Figure 221 Fang 7 Figure O 9

Claims (2)

[Claims] (1) In a bearing material formed by laminating two or more materials with different physical properties, cuts shaped to divide the material in the longitudinal direction are provided at intervals at least on the material surface that contacts the inner diameter of the bearing outer cylinder. A method for preventing strip distortion in an underwater bearing that prevents bimetallic effects due to differences in thermal expansion between the material and other materials. (2) In a fastener for attaching a strip to the inner diameter part of the bearing outer cylinder, the stretched parts are arranged in a parallel connected manner on both sides of the pressed part holding the screw hole part of the fastener, and the 1. A strip stopper for an underwater bearing, characterized in that the thrust force of the screw against the hole section causes deformation pressure to act on the pressed section through the widening action of the expanded section.