CA1170298A - Spindle bearing and lubrication system - Google Patents
Spindle bearing and lubrication systemInfo
- Publication number
- CA1170298A CA1170298A CA000401984A CA401984A CA1170298A CA 1170298 A CA1170298 A CA 1170298A CA 000401984 A CA000401984 A CA 000401984A CA 401984 A CA401984 A CA 401984A CA 1170298 A CA1170298 A CA 1170298A
- Authority
- CA
- Canada
- Prior art keywords
- housing
- bearings
- lubricant
- bearing
- key
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
ABSTRACT
A spindle bearing and lubrication system having bearings supporting a shaft for rotation within a housing to which the outer bearing rings are keyed. End retainers and a spacer locate the bearings axially, and, with the bearings, define annular lubricant cavities on both sides of both bearings. Lubricant inlet passages lead through the housing and spacer to the lubricant cavities. Lubri-cant outlet passages lead from the lubricant cavities through slots in the bearings, in the retainers, in the key, and in the housing keyway, and finally through a filter which prevents the entry of solid contaminants in the event of reverse flow.
A spindle bearing and lubrication system having bearings supporting a shaft for rotation within a housing to which the outer bearing rings are keyed. End retainers and a spacer locate the bearings axially, and, with the bearings, define annular lubricant cavities on both sides of both bearings. Lubricant inlet passages lead through the housing and spacer to the lubricant cavities. Lubri-cant outlet passages lead from the lubricant cavities through slots in the bearings, in the retainers, in the key, and in the housing keyway, and finally through a filter which prevents the entry of solid contaminants in the event of reverse flow.
Description
., ~ 3 ~ 32~
, Title: Spindle Bearing and Lubrication System"
This in~ention relates generall~ to ~earings an~
refers more particularl~ to a spindle beari~g and lubrica-tion system.
BA~GROU~D A~D, SUMM~RY OF TEIE I~JEN~IO~
High speed bearings, ~or example those u~ed to support a 4" ~ha~t or ~pindle rotating at 2600 r.p.m. or so, g~nerate c~ns;derable heat. The outer beari~g rings or race~ h~e a ten~den~y to slip during operation ~ecause of differential e~pan~ion, due to the ~act that the housing is cooled by ~he ambian~ air and hence is at a much lower temperature than the outer xings~ ~The inner bearing rings ox racesc being at su~stantially the same temperature as the sh~ft, have no tendency to 51ip when merely shrunX on the shaft.) Accoxdingly, it is o~ten necessary ~o key the outer bearing rings to the housing~
It is also known that excessive lubricant in bearing~ o~ a high speed application can be detrimental in that such excesslve l~ricant tends to churn and de~elop hea~. Therefore, it is an object of this invention to prevent excessive accumulation of lubricant by providing mean~ ~o~ a regula~ed flow of lubricant and to incorporate suc~ méan~ in the arrangemen~ for mounting and keying the spindlé be~rings.
- other o~jects and features of the inven~iorl wil become apparent as the following description proceeds r especially when considered with the accompanying drawings.
>" , . ' ' ~ ~ _ .
,....... . . .
' -1 3'70~98 -lA-More specifically the invention comprises a spindle bearlng and lubrication system comprising a housing, a pair of bearings in the housing rotatably supporting a shaft, and means for axially locating the bearings in the housing in spaced relation to one another. The locating means includes spacer means be-tween and engaging the adjacent ends of the bearings, and retainer means engaying the remote ends of the bearings. The spacer means cooperate~ with each bearing to define an inner lubricant cavity and the retainer means cooperates with each bearing to define an outer lubricant cavity. The housing and locating means have lubricant inlet passages leading to at least one cavity associated with each bearing for the lubrication of each bearing and for the flow of lubricant through each bear-ing to the other cavity associated therewith. The housing has lubricant outlet passage means. Connecting passage means provide communication between each of the other cavities and the lubricant outlet passage means. A key received in slots in the housing and bearings prevents the bearings from rotating relative to the housing, Portions of the slot in the housing comprises portions of the connecting passage means~
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Q 2 9 ~ ( BRI EF 3)ES CRI PTIO~ OF THE DRAWINGS
_ , Fig. 1 is a longitudinal sectional view taken on the line 1--1 in Fig. 2 showing a mounting and lu~rication system ~or spindle bearings in a grinding machine, in accor-dance with our invention.
Fig. 2 is a sectional view taken on the line
, Title: Spindle Bearing and Lubrication System"
This in~ention relates generall~ to ~earings an~
refers more particularl~ to a spindle beari~g and lubrica-tion system.
BA~GROU~D A~D, SUMM~RY OF TEIE I~JEN~IO~
High speed bearings, ~or example those u~ed to support a 4" ~ha~t or ~pindle rotating at 2600 r.p.m. or so, g~nerate c~ns;derable heat. The outer beari~g rings or race~ h~e a ten~den~y to slip during operation ~ecause of differential e~pan~ion, due to the ~act that the housing is cooled by ~he ambian~ air and hence is at a much lower temperature than the outer xings~ ~The inner bearing rings ox racesc being at su~stantially the same temperature as the sh~ft, have no tendency to 51ip when merely shrunX on the shaft.) Accoxdingly, it is o~ten necessary ~o key the outer bearing rings to the housing~
It is also known that excessive lubricant in bearing~ o~ a high speed application can be detrimental in that such excesslve l~ricant tends to churn and de~elop hea~. Therefore, it is an object of this invention to prevent excessive accumulation of lubricant by providing mean~ ~o~ a regula~ed flow of lubricant and to incorporate suc~ méan~ in the arrangemen~ for mounting and keying the spindlé be~rings.
- other o~jects and features of the inven~iorl wil become apparent as the following description proceeds r especially when considered with the accompanying drawings.
>" , . ' ' ~ ~ _ .
,....... . . .
' -1 3'70~98 -lA-More specifically the invention comprises a spindle bearlng and lubrication system comprising a housing, a pair of bearings in the housing rotatably supporting a shaft, and means for axially locating the bearings in the housing in spaced relation to one another. The locating means includes spacer means be-tween and engaging the adjacent ends of the bearings, and retainer means engaying the remote ends of the bearings. The spacer means cooperate~ with each bearing to define an inner lubricant cavity and the retainer means cooperates with each bearing to define an outer lubricant cavity. The housing and locating means have lubricant inlet passages leading to at least one cavity associated with each bearing for the lubrication of each bearing and for the flow of lubricant through each bear-ing to the other cavity associated therewith. The housing has lubricant outlet passage means. Connecting passage means provide communication between each of the other cavities and the lubricant outlet passage means. A key received in slots in the housing and bearings prevents the bearings from rotating relative to the housing, Portions of the slot in the housing comprises portions of the connecting passage means~
, "
, ,.
.
Q 2 9 ~ ( BRI EF 3)ES CRI PTIO~ OF THE DRAWINGS
_ , Fig. 1 is a longitudinal sectional view taken on the line 1--1 in Fig. 2 showing a mounting and lu~rication system ~or spindle bearings in a grinding machine, in accor-dance with our invention.
Fig. 2 is a sectional view taken on the line
2--2 in.Fig. 1.
DEl~AILED_ DESCRIPTIO:e;l .
Referring now more particularly to the drawings, the numeral 10 designates a grinder having a shaft or spindle 12 provided with a grinding wheel 14 secured to its outex end for grinding metal slabs, billets and the like. The wheel 14 is held on one end of sha~t 12 by any suitable means, as by a hub 16 shrunk on the sha~t and a removable clamping ring 18 secured to the hub 16 by bolts 20. A driving pulley 21 is mounted on the opposite end of shaft 12. A grinder is just one of numerous applications in which the bearing mounting and lubrication systam of this invention may be employed.
Shaft 12 is supported in cylindrical housing 22 by bearings 24 and 25. The bearings 24 and ~5 are located by a cylindrica~ spacer 26 dispose~ between the bearings and end retainers 28 and 30 which ara bolted or otherwise , suitably secured to opposite ends of the housing 22~ The retainers 28 and 30 have circular projections 32 and the spacex 26 has circular projections 34, which projections engage the outer bearing rings 36 ~o properly locate the bear.ings axially.
.
.. ~ ' ' - ' . .
2~
DEl~AILED_ DESCRIPTIO:e;l .
Referring now more particularly to the drawings, the numeral 10 designates a grinder having a shaft or spindle 12 provided with a grinding wheel 14 secured to its outex end for grinding metal slabs, billets and the like. The wheel 14 is held on one end of sha~t 12 by any suitable means, as by a hub 16 shrunk on the sha~t and a removable clamping ring 18 secured to the hub 16 by bolts 20. A driving pulley 21 is mounted on the opposite end of shaft 12. A grinder is just one of numerous applications in which the bearing mounting and lubrication systam of this invention may be employed.
Shaft 12 is supported in cylindrical housing 22 by bearings 24 and 25. The bearings 24 and ~5 are located by a cylindrica~ spacer 26 dispose~ between the bearings and end retainers 28 and 30 which ara bolted or otherwise , suitably secured to opposite ends of the housing 22~ The retainers 28 and 30 have circular projections 32 and the spacex 26 has circular projections 34, which projections engage the outer bearing rings 36 ~o properly locate the bear.ings axially.
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2~
3- .
RelatiVe rotation between the outer rings 36 and the housing 22 is prevented by an elongated key 38 fitted in a longitudinally extending slot or seat 40 in the outer su~face of spacer 26 and in a registering longituainally extending ke~way or slot 42 in the inner surface o~ housing 22. The ends of the key 38 enter notches or slots 48 and 50 in ~he outer xings 36, thus securing the outer rings 36~
and also the spacer 26, a~ains~ an~ rela~ive circumferen- -~ial motion with respect to housing 22. A second key 38' 9 seated in slots 40' and 42~ in the spacer and housing and haviny its en~ ~ter~g.:notches i~ ~he ou~er bearing rings, rna~ also bè provided if desired (see Fig. 2)~
The inner bearing xings 52 are secure~ on the . shaft 12 as by a shrink fit.
. There are annular cavities 54 and 56 between each bearing and one of the retainers 28 or 30, and annular cavities 58 ana 60 between each bearing and the spacer 26.
Lubrican~, preferably air-boxne, enters housing 22 through passages 62 and 64. Spacer 26 has passages 66 -and 68 which are disposed~in axial and circurnfererltial alignment with passages 62 ana 64 to insure uninhibited lu~ricant ~low to the bearings. A suitable air pump ~not shown) may b~ used to pump lubricant to passages 62 and 64 through fittings 70 ~one of which is sh~wn in Fig. 2) The centrifugal ~orce induced by the rotating elements of bearings 24 and 25 will pump most of the luhricant ~hrough the bearings an~ into annular cavities 54 and 56. Any excess~lubri.cant~w~ich is not thus pumped .. . .
.
.
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~ .
'7 ~ 2 ~3 (~
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through ~he bearings will collect in annular cavitie~ 58 and 60~
Key 38 has end ~otches or slots 72 and 74 which re~ister and are in direct communication with slots 48 and 50 in the outer bearing rings. Bearing ring slots 48 and S0 are in direct communication with the cavities 5~1 and 60 and key ~lots 72 and 74 are in direct ~ommunlcation wi~h end area~ 7~ a~d 78 o~ housing ke~way 42. The excess lubri- :
~ant in ~avities 58 a~d 60 will flow by gravity through registering slots 48 and 72 ana registering slots 50 and 74 into end portion~ or ar~as 76 and 78 of housing k~yway 42 beyond the ends of the key 38. The bearing locating pro-jections 32 of retainers 28 and 30 are provided with no~c~es or slots 80 and 82 which are disposed in circum~erential alignment with keyway 42 and provide direct communication between cavities 54, 56 and keyway 42. Lu~ricant which has accumulated in cavities 54 and 56 will flow by gravit~
thxough slots 80 and 82 into the end areas 76 and 78 of the housing keyway 42. To insure such gra~ity flow, the ke~way 42 is pre~erably located at or near khe lowest point of housing 2~. .
The housing 22 has a drain passage 84, which may be a drilled hole plugged at the ends as shown, located at the lowest point o* the housing. Drain passage 84 communi-cates with the end areas 76 and 78 o ke~way 42 by co~nect-ing passages 86 and 88. A drain outlet 90 pexmi ts the dis-c~rge ~* all lubricant from ca~ities 5~, 56, 58 and 60 via the routings as ae~cribed to prevent the accumulation of excess lubric~nt in~the beaFingsJ.
-- .
.
, A. .
7i3~9:3 ( Windage and ~riction will generate a certain amount of heat in bearings even in the presance of properly regulated lubrication. When the equipment is stopped, it will cool off, and the heat-expanded air within the housing will contract. Such contraction will pull air into the housing via drain outlet 90. A ~ilter member 92 is pro-vided in outlet 90 to permit the discharge o`~ lubricant during operation, and also to permit the entrance of air during cooling, while inhibiting the entrance of air-borne solid contaminants.
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,.~, .... , . ~ .
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.. .
RelatiVe rotation between the outer rings 36 and the housing 22 is prevented by an elongated key 38 fitted in a longitudinally extending slot or seat 40 in the outer su~face of spacer 26 and in a registering longituainally extending ke~way or slot 42 in the inner surface o~ housing 22. The ends of the key 38 enter notches or slots 48 and 50 in ~he outer xings 36, thus securing the outer rings 36~
and also the spacer 26, a~ains~ an~ rela~ive circumferen- -~ial motion with respect to housing 22. A second key 38' 9 seated in slots 40' and 42~ in the spacer and housing and haviny its en~ ~ter~g.:notches i~ ~he ou~er bearing rings, rna~ also bè provided if desired (see Fig. 2)~
The inner bearing xings 52 are secure~ on the . shaft 12 as by a shrink fit.
. There are annular cavities 54 and 56 between each bearing and one of the retainers 28 or 30, and annular cavities 58 ana 60 between each bearing and the spacer 26.
Lubrican~, preferably air-boxne, enters housing 22 through passages 62 and 64. Spacer 26 has passages 66 -and 68 which are disposed~in axial and circurnfererltial alignment with passages 62 ana 64 to insure uninhibited lu~ricant ~low to the bearings. A suitable air pump ~not shown) may b~ used to pump lubricant to passages 62 and 64 through fittings 70 ~one of which is sh~wn in Fig. 2) The centrifugal ~orce induced by the rotating elements of bearings 24 and 25 will pump most of the luhricant ~hrough the bearings an~ into annular cavities 54 and 56. Any excess~lubri.cant~w~ich is not thus pumped .. . .
.
.
- ~ ; ''.
~ .
'7 ~ 2 ~3 (~
(.
through ~he bearings will collect in annular cavitie~ 58 and 60~
Key 38 has end ~otches or slots 72 and 74 which re~ister and are in direct communication with slots 48 and 50 in the outer bearing rings. Bearing ring slots 48 and S0 are in direct communication with the cavities 5~1 and 60 and key ~lots 72 and 74 are in direct ~ommunlcation wi~h end area~ 7~ a~d 78 o~ housing ke~way 42. The excess lubri- :
~ant in ~avities 58 a~d 60 will flow by gravity through registering slots 48 and 72 ana registering slots 50 and 74 into end portion~ or ar~as 76 and 78 of housing k~yway 42 beyond the ends of the key 38. The bearing locating pro-jections 32 of retainers 28 and 30 are provided with no~c~es or slots 80 and 82 which are disposed in circum~erential alignment with keyway 42 and provide direct communication between cavities 54, 56 and keyway 42. Lu~ricant which has accumulated in cavities 54 and 56 will flow by gravit~
thxough slots 80 and 82 into the end areas 76 and 78 of the housing keyway 42. To insure such gra~ity flow, the ke~way 42 is pre~erably located at or near khe lowest point of housing 2~. .
The housing 22 has a drain passage 84, which may be a drilled hole plugged at the ends as shown, located at the lowest point o* the housing. Drain passage 84 communi-cates with the end areas 76 and 78 o ke~way 42 by co~nect-ing passages 86 and 88. A drain outlet 90 pexmi ts the dis-c~rge ~* all lubricant from ca~ities 5~, 56, 58 and 60 via the routings as ae~cribed to prevent the accumulation of excess lubric~nt in~the beaFingsJ.
-- .
.
, A. .
7i3~9:3 ( Windage and ~riction will generate a certain amount of heat in bearings even in the presance of properly regulated lubrication. When the equipment is stopped, it will cool off, and the heat-expanded air within the housing will contract. Such contraction will pull air into the housing via drain outlet 90. A ~ilter member 92 is pro-vided in outlet 90 to permit the discharge o`~ lubricant during operation, and also to permit the entrance of air during cooling, while inhibiting the entrance of air-borne solid contaminants.
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Claims (8)
1. A spindle bearing and lubrication system com-prising a housing, a pair of bearings in said housing rotatably supporting a shaft, means for axially locating said bearings in said housing in spaced relation to one another, said locating means including spacer means be-tween and engaging the adjacent ends of said bearings, and retainer means engaging the remote ends of said bearings, said spacer means cooperating with each bearing to define an inner lubricant cavity, said retainer means cooperating with each bearing to define an outer lubri-cant cavity, said housing and locating means having lub-ricant inlet passages leading to at least one cavity associated with each bearing for the lubrication of each bearing and for the flow of lubricant through each bear-ing to the other cavity associated therewith, said housing having lubricant outlet passage means, connecting passage means providing communication between each of said other cavities and said lubricant outlet passage means, and a key, said housing and said bearings having slots in which said key is received to prevent said bearings from rotat-ing relative to said housing, portions of said slot in said housing comprising portions of said connecting pass-age means.
2. A spindle bearing and lubrication system com-prising a housing, a pair of bearings in said housing rotatably supporting a shaft, means for axially locating said bearings in said housing in spaced relation to one.
another, said locating means including spacer means be-tween and engaging the adjacent ends of said bearings, and retainer means engaging the remote ends of said bearings, said spacer means cooperating with said bearings to de-fine inner lubricant cavities, said retainer means cooper-ating with said bearings to define outer lubricant cav-ities, said housing and locating means having lubricant inlet passages leading to at least one cavity associated with each bearing for the lubrication of each bearing and for the flow of lubricant througn each bearing to the other cavity associated therewith, said housing having lubricant outlet passage means, connecting passage means providing communication between all said cavities and said lubricant outlet passage means, a key to prevent said bearings from rotating relative to said housing, said housing having a slot in which said key is received, and slots in said retainer means, said slots in said housing and retainer means comprising portions of said connecting passage means.
another, said locating means including spacer means be-tween and engaging the adjacent ends of said bearings, and retainer means engaging the remote ends of said bearings, said spacer means cooperating with said bearings to de-fine inner lubricant cavities, said retainer means cooper-ating with said bearings to define outer lubricant cav-ities, said housing and locating means having lubricant inlet passages leading to at least one cavity associated with each bearing for the lubrication of each bearing and for the flow of lubricant througn each bearing to the other cavity associated therewith, said housing having lubricant outlet passage means, connecting passage means providing communication between all said cavities and said lubricant outlet passage means, a key to prevent said bearings from rotating relative to said housing, said housing having a slot in which said key is received, and slots in said retainer means, said slots in said housing and retainer means comprising portions of said connecting passage means.
3. A spindle bearing and lubrication system com-prising a housing, a pair of bearings in said housing rotatably supporting a shaft, means for axially locating said bearings in said housing in spaced relation to one another, said locating means including spacer means be-tween and engaging the adjacent ends of said bearings, and retainer means engaging the remote ends of said bear-ings, said spacer means cooperating with said bearings to define inner lubricant cavities, said retainer means cooperating with said bearings to define outer lubricant cavities, said housing and locating means having lub-ricant inlet passages leading to at least one cavity associated with each bearing for the lubrication of each bearing and for the flow of lubricant through each bear-ing to the other cavity associated therewith, said housing having lubricant outlet passage means, connecting passage means providing communication between all said cavities and said lubricant outlet passage means, a key, said housing and said bearings having slots in which said key is received to prevent said bearings from rotating re-lative to said housing, said key having slots, said slots in said housing, bearings and key comprising portions of said connecting passage means.
4. A spindle bearing and lubrication system com-prising a housing, a pair of bearings in said housing rotatably supporting a shaft, means for axially locating said bearings in said housing in spaced relation to one another, said locating means including spacer means between and engaging the adjacent ends of said bearings, and retainer means engaging the remote ends of said bear-ings, said spacer means cooperating with said bearings to define inner lubricant cavities, said retainer means co-operating with said bearings to define outer lubricant cavities, said housing and locating means having lub-ricant inlet passages leading to at least one cavity associated with each bearing for the lubrication of each bearing and for the flow of lubricant through each bear-ing to the other cavity associated therewith, said hous-ing having lubricant outlet passage means, connecting passage means providing communication between all said cavities and said lubricant outlet passage means, a key, said housing and said bearings having slots in which said key is received to prevent said bearings from rotating relative to said housing, slots in said retainer means and in said key, said slots in said housing, bearings, retainer means and key comprising portions of said connecting passage means.
5. A system as defined in claims 3 or 4, wherein said connecting passage means from each inner lubricant cavity leads through one of said bearing slots, one of said key slots, and said housing slot in direct sequence to said outlet passage means.
6. A system as defined in claim 2 or 4, wherein said connecting passage means from each outer lubricant cavity leads through the slot in one of said retainer means and through the slot in said housing in direct sequence to said outlet passage means.
7. A spindle bearing and lubrication system com-prising a housing, a pair of bearings in said housing rotatably supporting a shaft, means for axially locating said bearings in said housing in spaced relation to one another, said locating means including spacer means be-tween and engaging the adjacent ends of said bearings, and retainer means engaging the remote ends of said bearings, said spacer means cooperating with said bear-ings to define inner lubricant cavities, said retainer means cooperating with said bearings to define outer lubricant cavities, said housing and locating means having lubricant inlet passages leading to at least one cavity associated with each bearing for the lubrication of each bearing and for the flow of lubricant through each bearing to the other cavity associated therewith, said housing having lubricant outlet passage means, connecting passage means providing communication between all said cavities and said lubricant outlet passage means, a key, said housing and said bearings having slots in which said key is received to prevent said bearings from rotating re-lative to said housing, the ends of said key being located adjacent said respective bearings, said housing slot having portions extending beyond the ends of said key, a slot in each retainer means providing direct communication between the associated outer cavity and one end portion of said housing slot, each end of said key having a slot in direct communication with one end portion of said housing slot and with the slot of the adjacent bearing, said bearing slots being in direct communication with said respective inner cavities, said end portions of said housing slot having direct communication with said outlet passage means, said slots in said housing, bearings, retainer means and key comprising portions of said connecting passage means.
8. A system as defined in claim 7, including a filter in said outlet passage means permitting discharge of lubricant but preventing the entrance of solid con-taminants in the event of reverse flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000401984A CA1170298A (en) | 1982-04-29 | 1982-04-29 | Spindle bearing and lubrication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000401984A CA1170298A (en) | 1982-04-29 | 1982-04-29 | Spindle bearing and lubrication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1170298A true CA1170298A (en) | 1984-07-03 |
Family
ID=4122684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000401984A Expired CA1170298A (en) | 1982-04-29 | 1982-04-29 | Spindle bearing and lubrication system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1170298A (en) |
-
1982
- 1982-04-29 CA CA000401984A patent/CA1170298A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |