CA1228105A

CA1228105A - Underwater bearing protection device

Info

Publication number: CA1228105A
Application number: CA000442620A
Authority: CA
Inventors: Masaaki Nagashima
Original assignee: Individual
Current assignee: Individual
Priority date: 1983-03-31
Filing date: 1983-12-06
Publication date: 1987-10-13
Also published as: DE3411312A1; KR840008481A; FR2546996A1; KR870000388B1

Abstract

ABSTRACT OF THE DISCLOSURE:

A collar or collars are opposed to a hub and a sealing member or sealing members are mounted on the opposed portions of the collars and the hub. A bushing is attached between the hub and a shaft or the hub and the collars and a ring-like hole to which clean water is supplied is formed inside the hub and bushing. A bearing portion between the bushing and the shaft or the cylinder portion is lubricated by the clean water. Also, the clean water is supplied to a clean water pressure portion between the hub, the collar and the seal member and the invasion of sand and mire to the bearing may be prevented.

Description

Lo 2 TITLE OF THE INVENTION
An Underwater Bearing Protection Device BACKGROUND OF TIE INVENTION
The present invention relates to an underwater bearing protection device for preventing rapid abrasion of the bearings in equipment. for removing sand in a cleaning bed of a filtration Plant or for using in the settling basins, in which sand, sewage, etc. are deposited, in drainage disposal plants, sewage disposal plants or paper man~cturing ndus trips .
Conventional underwater bearings ox sewage scrapers, disposing sand scraping lens, agitators, pumps, etc. are remarkably worn by the invasion of sand and mire.
For removing this defect, the applicant of this application proposed an underwater bearing protection device in which a bushing is rotatable mounted on a sleeve attached to a fixed shaft, a hub is fixed on the bushing, both sides of the hub are covered by outer edges of collars, the inner edges of which are respectively fixed on the using o rings are mounted between the both edges of hub and the outer edges of the collars, the flange of a chain wheel is fixed on the hub and thus the flange, the hub and the bushing are rotated (See Japanese Patent Publication No. 54653/82).
In the underwater bearing protection device, or preventing the invasion of sand and mix from the portions of the O rings between the outer edges of the collars and the both sides of hub due to the rotation ox the Lange, clean water is Passed into the center water supplying passage which is provided with the center of the fixed shaft through the water pipe which AL Lo 5 is attached on the fixed shaft. This is supplied to a ring-like hole which is provided with the bushing and hub from the center water supplying Passage through the sleeve and slows from inclined water supplying pus through the ring - like hole to the outside edges.
However, in order that the inclined waxer supplying passages are opened at constant interval in the peripheries of the both sides ox the hub near the gaps between the both Audi of the hub and the the outside dyes of the collars, the clean water my be equally caused to flow to thy outer side edges of the collars. I~h~reEor~, when many~orei~n materials such as floating sand and so on are deposited in a cleaning bed, there is the problem -that this sealing effect is not sufficient.

SUMMARY OF THE INVENTION
The object of the Present invention is therefore to provide an underwater bearing protection device to prevent the sand and mire floating underwater from approaching the gaps between the both edges of the hub and the outside edges of toe collars The other object of the present invention is to provide an underwater bearing protection device in which seal eyebrows are respectively provided with the outside edges ox the collar and the peripheries of the hub near the outside edges, clean valor pressure portions are wormed in the seal members by ~ushlng clean water, and when the clean water is stopped such foreign materials as sand and mire floating underwater do not enter into the seal members.
The constitution of the present invention for attaining the above objects comprises a fixed shaft, a sleeve attached on ~2Z~05 the said fixed shaft, a bushing rotatable mounted on the periphery of said sleeve, collars having inside edges attached on said sleeve and outside edges respectively covering the both sides of said hub, and seal members having bases attached on the both edges ox said hub or the outside edges of said collars and lips respectively contacting the outside eyes of said collars or the both edges of the hub, whereby clean water is supplied to a rink - like hole wormed in the bushing and the hub through a center water supplying passage wormed in the center ox said idea shalt and a water Passage of said sleeve prom a water pipe attached outside said fixed shalt and is supplied to clean water pressure portions between said seal members and the both edges ox the hub and said outside edges of said collars through water passages formed in the hub or gaps between said sleeve and said bushing and between said koalas and bushing from said ring-like hole.
BRIM DESCRIPTION OF THE DRAWINGS :
Fig. 1 is a sectional view of an under ~ater-bearing protection device proposed by the present applicant.
Fig. 2 is a sectional view of an underwater bearing protection device of the first embodiment according to the present invention.
Figs. I and I are sectional views ox seal members.
Fig. 4 is a sectional view of an underwater bearing Protection device of the second embodiment according to the Present invention.
Fig. 5 is a sectional view ox an underwater bearing protection device ox the third embodiment according to the Present invention.
,.

Fig. 6 is a sectional vie of on underwater bearing protection device of the worth embodiment according to the present invention.
Fix. 7 is a sectional vie ox an underwater bearing protection device ox the fifth embodiment according to the present invention.
Fig. is a sectional view of an underwater bearing protection device of the sixth embodiment according to the present invention.
Fix. 9 is a plane view of a tape ox a seal eyebrow according to the present invention.
it. lo is a sectional view of an underwater bearing protection device of the seventh embodiment according to the present invention.
Fig. 11 is a sectional view of an under~atsr bearing protection device ox the eighth embodiment according to the present invention.
Fig. 12 is a sectional view ox an underwater bearing protection device ox the ninth embodiment according to the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS :
Prior to the description ox the preferred e~bodi~ent~ of the present invention, the prior art Jill be described briefly in order to explain its underlying principle and to specifically point out the deject thereof. In Fix. 1, a fixed shaft 1 is attached to a shalt coupling 2 by a screw pa as shown by dotted lines. A sleeve 3 is attached the fired shalt 1 and a bushing 4 is rotatable mounted the sleeve 3 and is divided into two sections.
A hub is held between the Protrusions pa and 4b of the section L~28~L~5 of the bushing 4 and is fixed by two screws 5. A flange 7 of a chain wheel is fixed on the outer face of the hub by voiding.
Collars 8 covers both sides of the hub 6 and the inner edges pa are mixed to the sleeve 3; the outside edges 8b of the collars 8 are covered by both outsides of the hub 6 and O
rink 9 is provided between the outside educe 8b ox the collars 8 and the both edge of the hub 6. A rink e hole 10 is formed between the sections of the Boone 4 and is hollowed Will respect to one Portion of the hub 7. plurality off-cold din supply past 11 are obli~l~.ly:Eorm~ irk ye hub 6 and are turned direct the outside edges 8b. A center water supplying passage 12 is formed in the center of the fixed shaft 1 and is connected to the ring- like hole lo The center water supplying passage 12 has a water supplying passage hole connected to a water pipe 13.
In the underwater bearing protection devices shown in Fig. 1, when the flange I is rotated, in order to prevent sand and mire from invading the portion of the D rings 9 from the zaps between the outside edge 8b of collars 8 and the outside of the hub 6, the sand and wire approaching the outside edges 8b are blown off by shin clean water to the outside edges 8b of the collar 8 from the inclined water supplying passages 11 through the center water supplying passage 12 of the fixed shaft 1 and the ring - like hole lo from the water Pipe 13. and the invasion of the mire and sand from the rink - like ups between the outside owe the hub and the outside edges of collars-is Prevented .
However, in order that the inclined water supplying passages 11 are provided with the outer edges oath hub 5 at Jo - 5 -Lo AL S

constant intervals, the sealing effect of the inclined water supplying passage 11 is insufficient.
Fig. 2 shows a sectional vie of the first e~bodiuent of an underwater bearing protection device of the present invention. In Fix. 2, 1 denotes a idea shaft, 2 a shaft coupling, 3 a sleeve, 4 a bushing screws, 6 a hub, 7 a flange, 8-the collars, 9 the O rings, lo a ring like holy, 12 a center water supplying passage and 13 a water pipe, and since the same numerals denote similar parts a in it 2, a d~;tL~ d explanation I these constitutions is omitted.
In the present e~bodim0nt, the bases aye ox seal member I are fixed on the outer face ox the hub 6 and the lips 14b of the seal members 14 are contacted with the outside edge 8b of the collars 8. Clean water is supplied to the clean water prosier portions 16 surrounded by the seal members 14 from the ring like hole lo through water passages 150 The collar 8 are fixed to the sleeve 3 by screws 18.
In the underwater bearing Protection device, wince the clean water pressure portions 16 are formed between the seal members 14, the outs faces of the hub 7 and the outside edges 8b of the collars 8, when clean water is sent the clean water pressure portions 16 through the center water supplying pudgy 12 the ring - like hole lo and the water supply passages 15 from thy water pipe 13, the lips lob of thy seal eyebrows 14 are opened by valor pressure, and the clean water is gushed from the clean water pressure portions 16 to the periphery of the outside edges 8b of the collars 8 and flows in oh radial direction ox the collars Therefore, the sand and mire near the seal members 14 and collars 8 are blown away by thegu~hing water ~L~28~

On the other hand, when the pressure of the clean water in the clean water pressure portions 16 is lowered by the damage and the stopping of the pump for supplying clean water, since the pressure of the dispersal water in the cleaning bed acts from outside to inside of the seal members 14 and the lips 14b of the seal members 14 are pressed to -the outside edges 8b of the collar 8, the invasion of toe sand and mire into the bearing is prevented.
Tile seal members I are made of resilient material such as rubber ox plastic. us shown in Fig. I, the no-in~orcelnent material 17 is lied yin the seal material 14 and as shown in Fig. I, the reinforcement material 17 is attached to the one side of the seal material 14.
Fig. 4 shows a sectional view of the second embody-mint of an underwater bearing protection device of the pros-en invention. In Fig. 4, 1 denotes a mixed shaft; 2 de-notes a shaft coupling; pa denotes screws; 3 denotes a sleeve; 4 denotes a bush; 5 denotes a screw; 6 denotes a hub; 7 denotes a flange; 8 denotes collars; 9 denotes o-rings; 10 denotes a ring-like hole; 12 denotes a center water supplying passage; 13 denotes a water pipe; 14 denotes seal members; 15 denotes water supply passages; 16 denotes clean water pressure portions. Since the same numerals denote similar parts as in Fig. 2, a detailed explanation of these elements is omitted. In the embodiment a gap 19 is formed between the sleeve 3 and ~LZZ89 the bushing 4 and gaps 20 are formed between the Cole 8 and the sides of the bushing 4 and the sides of the hub 6.
Clean water flows in the peripheries of the 0-ring 9 mounted between the outside edge 8b of the collars 8 and the both sides of the hub 6 through the gaps 19 and 20 from the ring-like hole 10. The diameter of the collar 8 is the same as or smaller than the hub 6, but similar to the embodiment shown in Fig. 2.
The embodiment of Fig. 4 has collars or flanges 8 with a diameter equal to or less than the diameter of hub 6, but is otherwise similar to the embodiment of Fig. 2.
In this embodiment, the fluid seals are formed in the gaps 20 between the collars 8 and the sides of the hub 6 and the bushing 4 and in the gap lo between the bushing 4 and the sleeve 3, and the clean water pressure portions 16 are formed by the seal members 14, and thus, the invasion of the sand and mire is prevented.
In the embodiment shown in Fig. 4, because the dip emoter ox the collars or flange 8 are the same as or small for than the diameter of the hub 6, the whole of the under-water bearing protection device may be made more compact.
Fig. 5 shows a sectional view of the third embody-mint of an underwater bearing protection device of the pros-en invention. In Fig. 5, l denotes a fixed shaft; 2 de-notes a shaft coupling; 3 denotes a sleeve; 4 denotes a bushing; 5 denotes a screw; 6 denotes a hub; 7 denotes a flange; 8 denotes collars; 9 denotes 0-rings; lo denotes a ring-like hole; 12 denotes a center water-supplying passage;
13 denotes a water pipe; 14 denotes seal members; 15 denotes Lo water supply passages; 16 denotes clean water pressure port lions and 19 and 20 denote gaps. Since the same numerals denote similar parts as in Fig. 4, a detailed explanation of these elements is omitted. In the present embodiment, the diameter of the collar 8 is the same as or smaller than the hub 6 and the O-ring 9 is omitted. The bases aye of the seal members 14 are respectively fixed to the step portions 8c of the collars 8 end the lips 14b of the seal members 14 are contacted with the outside portions of the hub I
Fig. 6 Sly a sectional view of the fourth embody-mint ox an underwater wearing protectioll device of the pros-en invention. Since the same numerals in Fig 6 denote silnilar parts as in Fig. 5, a detailed explanation of these constitutions is omit-ted. The bases aye of the seal members 14 are mixed to the step portion pa and lips 14b are contacted with the edges Ed of the collars 8.
In the embodiments shown in Figs. 5 and 6, because the diameters of the collars 8 are same as or smaller ", - pa -I

than the diameter of the hub 6, the whole of the underwater bear in protection device Jay be jade compact. Because the 0 - ring 9 is not used, the Jechanica1 abrasion between the 0 rings 9 and the outside ox the hub 6 is prevented and therefore the flange 7 is rotated at high speed.
Because the a rinks 9 are not used, the sealing action in this bearing may be reduced. Louvre this defect it removed by increasing the amount of clean water.
it 7 show a sectional view owe the it embodiment Ox an underwater bearing Protection device ox the present invention. In jig. 7, 1 denotes a fixed shaft, 2 a shaft coupling a sleeve, 4 a bushing, 5 screws, 6 a hub flange, 8 collars, 9 0 rings, 10 a rink - like hole, 12 a center water supplying passage, 13 a water pipe, 14 sealing members, 15 waler supply passages, 16 clean water Pressure portions and 19 and 20 art gaps and since the same numerals denote similar parts as in Fix. 5, the detailed explanation of these elements is omitted. In the fifth embodiment, the water supplying passages 15 are not foreside and the whole clean water is supplied to the clean water Pressure portions 16 through zaps 19 and 20.
In this embodiment, because the water poseurs 15 are not wormed in the hub 6, the design of the underwater bearing protection device in this embodiment is simpler than the embodiment of Fig. 5. Because the whole clean water it passed through the gaps 19 and 20, the lubrication button the collars 8 and the sides ox the hub 6 and the bushing 4 and between the sleeve 3 and bushing 4 is i~prov0d and the sealing effect becomes increased. In the present embody t, because the lean water is passed to the narrow spaces, the flow resistance in the passage to the clean water pressure portions 16 from the gaps 19 becomes large. This can be solved by making thy pressure or sending the clean water large.
Fig. 8 shows a sectional vie of the sixth e~bodi~ant of an underwater bearing protection device of the present invention. Since the same numeral denote similar part as in Fix. 7, thy detailed explanation of these constitutions is omitted. In thy present o~bodi~0nt,s~alin~ members are formed by stacking a plurality of types and one side of the stacked taps is attached to the hub 6. As shown in jig. I, tapes Z1 has a resilient core aye formed in only the base thereof and is not formed in a lip 21b thereon. When the clean water is gushed from the clean water pressure Portions 16, the lip 21b is easily opened. When circularly forming this tape 21, the tapes 21 are respectively bent by the step Portions in the both side of the hub 6 and the both edges of the tapes 21 are stacked and attached to each other.
The underwater bearing protection device according to the present embodiment Jay be Provided with a dividing type underwater bearing in which the rotatable shaft is divided two sections by a Plane passing through the center of the shaft.
Fig. lo shows a sectional view of the seventh embodiment of an underwater bearing protection device of the Prevent invention. This embodiment is different prom the above first to sixth embodiments and the shaft is rotated. In jig. lo hub I is exude body 22 by a screw 23 and a bushing 25 is fixed inside the hub 24 by a screw 26. A collar 27 has a cylinder portion 27 Bush protrudes into the bushing 25 and the outside edge : `

Lo 2 Lo 27 which it covered by the outside of the edge of the hub 24. An 0 ring 28 is attached between the outside of the hub 24 and the inside of the outside edge of the collar 27. A thrust needle bearing 29 is attached between the collar 27 and the side of the bush~lg 25. A seal member 30 has a base aye fixed to the hub 24 and a lip 30b is contacted with the outside edge of the collar 27. One edge of a rotational shalt 31 is fixed into the cylinder portion 27 of the collar 27. A waler Pipe 32 is attached to the outside the hub 24 and is connected to a ring - like hole 33 which is furrowed in a contact portion between the hub I and the Bush 25 by a water passage. Clean water is Passed through a gap I between the hub 24 andbushin~ 25 from the ring like hole 33 and is supplied to a clean water pressure portion 36 which is surrounded by the seal member 30 through a longitudinal water Passage 35 from the zap 34.
In equipment having a rotational shaft as shown in Fig. 10, the invasion of sand and mire button the bushing 25 and the cylinder portion aye of the collar 27 is prevented by the seal nabber 30.
Fix. 11 shows a sectional view of the eighth embodiment of an underwater bearing protection device of the Present invention. In Fig. 11, 22 denotes a body 23 a screw, 24 a hub, 25 a bushing screws, 29 a thrust needle bearing, 31 a rotational shaft, 32 a water pipe 33 a ring - like hole, 34 a gap, and since the save numerals denote similar parts as in Fix. 10, the detailed explanation of these elements is omitted. In the embodiment, the diameter ox the outside edge 27b of thy collar 27 is same as or smaller than the hub 24, the base aye of the seal eyebrow 30 is attached to the I

step portion 27c of the outside edge 27b ox the collar I and the lip 30b it contacted with the outside of the hub 24. The clean water it supplied to the clean valor pressure portion 37 which is surrounded by the seal member 30 through an inclined valor supplying passage 38 from the ring like hole 30.
Fix. 12 shows a sectional vie of the ninth embodiment o- an underwater bearing protection device of the present invention. Since the same numerals denote similar parts as in Foe. 11, detailed explanation ox thwack mints is omitted. In Tao ombodimant, two base aye of the coal eyebrow 30 is attached to the outside oboe I and the lip 30b is contacted to the outside edge 27b of the collar 27. The clean water is passed through the lateral water Passage 39 which is formed in the hub 24 from the ring-like hole 33 and is supplied to the clean water pressure portion 37 which is surrounded by the sealing en 30 ought the gap byway the bushing 25 and the cry-liner Portion aye of the collar 27 and the gap between the outsits edge 27b and the thrust needle bearing 29 and the hub 24 from the lateral water passage I
As stated above, in the present invention, the seal member or members are mounted between the hub and the collar or collars and the clean water is supplied to the clean water pressure portion or portions which are surrounded by the seal member or members and is gushed between the lip or lips of the seal member or members and the outside of the hub or the outside edge or edges of the collar or collars. wherefore, the quick abrasion ox a bearing is prevented in all equipment having a idea shaft or a rotation shalt.

Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:

1. An underwater bearing protection device comprises:
a fixed shaft;
a sleeve attached on the said fixed shaft;
a bushing rotatably mounted on said sleeve;
a hub fixed around the outside of said bushing;
collars having inside edges attached on said sleeve and outside edges respectively covering the both sides of said hub, and sealing members having bases attached on the both edges of said hub or the outside edges of said collars and lips respectively contacted to the outside edges of said collars or the both edges of the hub;
whereby clean water is supplied to a ring-like hole formed in the bushing and hub through a center water supply-ing passage formed in the center of said fixed shaft and a water passage of said sleeve from a water pipe attached out-side said fixed shaft and is supplied to clean water pres-sure portions between said sealing members and the both edges of the hub and said outside edges of said collars through water passages formed in the hub or gaps between said sleeve and said bushing and between said collars and bushing from said ring-like hole.

2. An underwater bearing protection device as set forth in claim 1 wherein the outside edges of said collars are respectively covered the both outside of said hub.

3. An underwater bearing protection device as set forth in claim 1 wherein the diameter of said collar is the same as or smaller than that of said hub.

4. An underwater bearing protection device as set forth in claims 2 or 3 wherein O rings are mounted between the outside edges of said collars and the outside of the hub.

5. An underwater bearing protection device as set forth in claim l wherein said sealing member is made of a resilient material.

6. An underwater bearing protection device as set forth in claim 5 wherein said resilient material a rubber or plastic material.

7. An underwater bearing protection device as set forth in claim 1 wherein a reinforcement is buried in the base of said sealing member.

8. An underwater bearing protection device as set forth in claim 1 wherein a reinforcement is attached to the side of the base of said sealing member.

9. An underwater bearing protection device as set forth in claim 1 wherein said sealing member is made of stacked tapes having a core in one side.

10. An underwater bearing protection device as set forth in claim 1 wherein said sealing member a tape having a resilient covering member is changed a form thereof by water pressure and a core formed inside said covering member

11. An underwater bearing protection device compris-ing:
a hub attached to a body;
a bushing attached inside the hub;
a collar having a cylinder portion rotationally attached to the said bushing and an outside edge provided with the opening portion of said cylinder portion and covering the sides of said hub and said bushing;
a thrust needle bearing mounted between said outside edge and the side of said bushing;
a rotational shaft, one end of which is fixed into said cylinder portion; and a sealing member having a base attached to the outside of said hub or the outside edge of said collar and a lip which is contacted with the outside edge of said collar or the outside of said hub, whereby clean water is passaged through a ring-like hole formed in said hub from a water pipe attached to the hub, and is supplied to a clean water pressure portion between said sealing member and the outside of said hub and the outside edge of said collar through a water passage formed on said hub or a gap between said bushing and the cylinder portion of said collar from said ring-like hole.

12. An underwater bearing protection device as set forth in claim 11 wherein the outside edge of said collar is covered by the outside of said hub.

13. An underwater bearing protection device as set forth in claim 12 wherein an O ring is mounted between the outside edge of said collar and the outside of said hub.

14. An underwater bearing protection device as set forth in claim 11 wherein the diameter of said collar is the same as or smaller than that of said hub.

15. An underwater bearing protection device as set forth in claim 11 wherein said sealing member is made of a resil-ient material.

16. An underwater bearing protection device as set forth in claim 15 wherein said resilient material is of rubber or plastic.

17. An underwater bearing protection device as set forth in claim 11 wherein a reinforcement member is buried in the base of said seal member.

18. An underwater bearing protection device as set forth in claim 11 wherein a reinforcement member is attached to the side of the base of said sealing member.

19. An underwater bearing protection device as set forth in claim 11 wherein said sealing member is made of stacked tapes having a core in one side.

20. An underwater bearing protection device as set forth in claim 11 wherein said sealing member a tape having a resilient covering member changed a form thereof by water pressure and a core formed on the inside of said covering member.

21. An underwater bearing protection device as set forth in claim 4 wherein 0 rings are mounted between the outside edges of said collars and the outside of said hub.