JPS60116964A - Tape for sealing apparatus - Google Patents

Abstract

PURPOSE:To improve sealing effect by constituting a tape for a sealing apparatus from an outside covering part which has elasticity and can be deformed by compression and an inside core part having the stronger elasticity. CONSTITUTION:A tape 4 for a sealing apparatus is constituted of an outside covering part 41 which has elasticity and can be deformed by compression and an inside core part 42 having the stronger elasticity. The outside covering part 41 at the top edge part which forms the lip of the tape 4 is compressed onto the peripheral surface 51 of a hub 5 and deformed along the shape of the outer peripheral surface 51 of the hub 5 and closely attached onto the surface part of the outer peripheral surface 51 of the hub 5. Therefore, intrusion of the foreign materials such as sand from outside can be prevented because of the tape 4, when a sealing plate 1 is not yet spread.

Description

[Detailed description of the invention] The present invention relates to tapes used for attaching seals in liquids.

Conventionally, sealing devices have been used in devices that rotate in liquid to prevent foreign matter, impurities, etc. from entering rotating parts.

For example, the applicant has already applied for an underwater bearing device (1983).
Utility Model Registration No. 84140 in 2008, No. 45778 in 1958
No.), as shown in FIG.
The lip 11 of the sealing plate l forms an annular fresh water pressure reservoir 2 surrounded by the outer circumferential surface 51 of the collar and the outer circumferential surface 101 of the collar.
is brought into contact with the outer circumferential surface 51 of the hub 5, and fresh water is blown out into the pressure reservoir 3 through the water passage hole 3 passing through the inside of the hub 5.

The fresh water in the pressure reservoir 2 forms a rudder with almost uniform annular pressure, and this pressure causes the lip 11 of the seal plate 1 that is in sliding contact with the outer peripheral surface of the hub 5 to press against the bearing part inside the hub 5. Clean water is blown out along the outer circumferential surface of the hub 5 while elastically expanding outward from the outer circumferential surface of the hub 5, so that sand, foreign matter, etc. near the outer circumferential surface of the seal plate 1 and the hub 5 are blown out. These foreign objects are blown away by the air bearing, and are ultimately prevented from entering the submersible bearing device.

In addition, in the underwater bearing shown in FIG. 2, instead of forming an annular pressure reservoir by blowing out fresh water as in the case of FIG. The tip of the seal plate 1 called D There is.

Therefore, in the seal plate 1 used in FIG. 1, since the inner lip 11 of the seal plate 1 needs to be expanded by the pressure of fresh water from the pressure reservoir, the lip portion is bent by the above pressure. It is necessary to deform it to the extent that it creates a small gap.

Therefore, the lip 11 is required to have the most appropriate elastic modulus in response to bending stress depending on the water pressure in the pressure reservoir, the amount of fresh water pumped into the pressure reservoir, etc.

On the other hand, since parts other than the lip part do not need to be deformed, they are required to have a stronger elastic modulus than the lip part.

Moreover, when fresh water is not blowing out from pressure reservoir 2,
The lip 11 of the seal plate 1 is pressed against the outer periphery 51 of the hub 5 and is required to eject foreign matter such as sand from entering the pressure reservoir 2.

On the other hand, in the case of FIG. 2, the fixed end 12 of the seal plate 1 is fixed to the bearing sleeve 7, and the free end 13 is crimped to the underwater bearing metal 6 by the elasticity of the seal plate 1. Due to the reaction of the pressure bonding, the seal plate 1 is bent into a shape that is more warped than its natural state.)

In this case, when the free end 13 of the seal plate is simply elastically crimped to the underwater bearing metal, the free end 13 comes into close contact with the underwater bearing metal 7, so that there is no sand or dirt between the seal plate and the underwater bearing metal. It is required to prevent foreign substances from entering.

In this way, in the case of the seal plate for the pressure reservoir shown in Figure 1, the second
Even in the case of the seal plate of the V-ring shown in the figure, although the characteristics of the material required differ depending on the part of the seal plate, conventionally seal plates have been made of the same material.

Therefore, for example, in the case of FIG. 1, in order to weaken the elasticity of the lip 11 part, it is necessary to take some troublesome work such as reducing the thickness of the seal plate in this part. The seal plate shown in Figure 2 must be made of a strong elastic material as a whole, but in general, materials with a strong elastic modulus do not deform under compression, so the tip of the seal plate is attached to the underwater bearing metal. It was difficult to get close contact.

In addition, in conventional sealing devices, for example, as shown in Fig. 3, the underwater bearing device is cut into two by a plane that passes through the center of the shaft. This inevitably results in a cracked shape, which inevitably creates a gap in the cracked part, which makes it easy for foreign matter such as sand to enter.

The present invention aims to overcome these drawbacks of conventional sealing devices.

The present invention utilizes a material that can be deformed by compression and has elasticity (
It consists of an outer covering made of rubber, Teflon resin, etc., and an inner core made of a material with stronger elasticity (eg, thin steel plate, etc.).

The following will explain the embodiments shown in the drawings.

The embodiment shown in FIG. 4(a) is an embodiment of the tape used for the seal plate forming the pressure reservoir shown in FIG.

In the embodiment described above, the end portion of the tape 4 forming the inner lip consists of only the outer covering portion 41, and the inner core portion 42 is present at a portion other than the portion forming the lip, as shown in FIG. 4(b). An example is a tape used for a V-ring which is a sealing device shown in FIG.

In the embodiment shown in FIG. 4(b), the outer core part is sandwiched between the inner covering part up to the free end of the tape 4 that contacts the submerged bearing metal.

In addition, the 4th (a) and (b) are attached to one end of the tape 4.
) Both figures show a shape in which the inner core reaches the end surface of the tape, but the shape of this part does not necessarily have to be like this; the outer part consists only of the covering part, and the inner core part It may be a shape that has not reached this point.

FIG. 5(a) shows a situation in which the embodiment shown in FIG. 4(a) is used for a seal plate 1 forming a pressure reservoir of an underwater bearing protection plate. Here, the outer peripheral surface 10 of the collar 10
A tape 4 is wrapped around the hub 5 in an overlapping manner, and the outside of the tape 4 is fixed by a protruding stopper 102, and a lip-forming portion of the tape 4 is in contact with one outer circumferential surface 51 of the hub 5.

In this case, the tape 4 is attached in such a manner as to press against the outer circumferential surface 51 of the hub 5, and conversely, due to the reaction from the outer circumferential surface 51 of the hub 5, the portion of the tape 4 corresponding to the lip has a somewhat warped shape.

The outer covering portion 41 at the tip forming the lip of the tape 4 is compressed against the outer circumferential surface 51 of the hub 5.
It is deformed along the shape of , and is in close contact with the surface portion of the outer circumferential surface 51 of the hub 5 .

Thereby, when the seal plate 1 formed by the tape 4 is not expanded, it is possible to prevent foreign matter such as sand from entering from the outside.

On the other hand, a seal plate 1 with a collar 10, a hub 5, and a tape 4
Fresh water is forced into the pressure reservoir formed by the pressure reservoir, and when the pressure of fresh water in the fresh water pressure reservoir exceeds a certain value, the fresh water flows to the outer side of the tape 4 that forms the seal plate 1, which has relatively weak elasticity. The part corresponding to the lip consisting only of the covering part is expanded and ejected to the outside.

In addition, since the stopper j02 and the collar outer peripheral part 101 are attached by pressing the other end of the tape 4 forming the seal plate, the outer covering part 41 of the tape 4
is deformed by compression so as to follow the shapes of the surfaces of the stopper 102 and the outer circumferential portion 101 of the collar, so that they come into close contact with each other. is completely sealed from the beginning.

FIG. 5(b) shows the same as that shown in FIG. 4(b) used for the ring 1 constituting the sealing device.

In this case, the V-ring consists of the tape 4 and a tape fixing portion 121 that fixes the portion of the tape 4 that forms the fixed end of the seal plate.

The part forming the free end 13 of the sealing plate of the tape 4 is attached to the tape by the tape fixing part 121, and the underwater bearing metal 6
Since the tape 4 is fixed in such a shape as to press down, the tip forming the free end 13 of the tape 4 is deformed along the shape of the surface of the underwater bearing metal 6, as shown in FIG. It will adhere to the surface.

This close contact with the underwater bearing metal can provide a much greater sealing effect than conventional V-rings.

In addition to the effects in each application example described above, if the tape of the present invention is used, the number of overlapping tapes used for sealing plates can be adjusted depending on the strength of water pressure, making it suitable for each type of machine. There is no need to design a separate seal plate accordingly.

The sealing plate can be designed by adjusting the number of stacked tapes prepared in advance, so designing the sealing device is extremely simple.

Also, in the split mold device shown in Fig. 3, the seal plate can be formed by wrapping tape around the device that connects the individual split mold parts, so no cracks can be formed in the seal plate itself. Moreover, by winding the tape 4, it is possible to further strengthen the connection of the 1-piece type device. As described above, the tape of the present invention makes it possible to obtain an extremely strong sealing effect with a simple design, and the effect is particularly remarkable in a split-type device.

[Brief explanation of the drawing]

Figure 1: A cross-sectional view showing the configuration of a pressure reservoir using a conventional seal plate in an underwater bearing protection device. Figure 2: A cross-sectional view showing a sealing device for an underwater shaft using a V-ring. Figure 3. Cross-sectional views of the inner collar and seal plate of the underwater bearing device. Figures 4(a) and 4(b): Planar perspective view and cross-sectional view of the tape of the present invention. Figure 5(a): The tape of Figure 4(a). Figure 5(b) is a sectional view showing the situation in which it is used as a sealing plate for forming a pressure reservoir: A situation in which the embodiment shown in Figure 4(b) is used as part of the structure of a V-ring which is a sealing device. FIG. 6: A cross-sectional view showing how the outer covering portion of the tape deforms along the surface of the pressed surface. 1. Seal plate 11. Lip 12. Fixed end of V-ring shaped sealing plate 13. Free end of V-ring shaped sealing plate 2.phi. Pressure reservoir 4. Tape 41. Outer covering part 42.
Inner core 5・Hub 5・Outer periphery of hub 6・Underwater bearing metal 7・Bearing sleeve 10φ Collar 10'l・
Outer circumference of the collar 1020 Clasp 121 of the collar ・V-ring tape fixing part Applicant's attorney/patent attorney Nao Akao Otsume l Closing 82 Figure A4 (a) Lead Figure 4 (b) Figure 5 (CL) Figure 5(b) Closed No.
No. 2, Title of the invention Tape for sealing device 3, Relationship with the person making the amendment case 4, ¥ Fraudulent applicant Furikana Mad Oyama Address 272 Oyama, Matsudo City, Chiba Furigana Mr. Masaaki Nakashima Name Length 1! (-Sho 4, Agent 6, Subject of amendment Name of the beginning J of the specification 7, Contents of amendment Procedural amendment 1 to correct the name of the invention as "tape for sealing device", Indication of the case 1982 Patent Application No. 222284 2, Title of the invention: Tape for sealing device 3, Relationship with the amended case: Patent applicant 4, Agent address: 4-23-2-410-6, Ikenohata 4-chome, Taito-ku, Tokyo
, the statement 7 on page 1 of the specification subject to amendment, and the statement on page i1 of the specification of contents of compensation are corrected as shown in the attached sheet 1"5!
'i, ,'J, 'i'' 1 Specification 1, Title of the Invention Tape for sealing device 2, Claims An outer covering part made of a material that is deformable by compression and has elasticity, and from the outer covering part. A tape for a seal device comprising an inner core made of a material having strong elasticity. 3. Detailed Description of the Invention The present invention relates to a tape used for attaching a seal in a liquid. A sealing device was used to prevent foreign matter and impurities from entering the parts.

Claims (1)

[Claims] A tape for a sealing device comprising an outer mold covering part made of a material that is deformable by compression and has elasticity, and an inner core part made of a material having stronger elasticity than the outer covering part.