CA1204463A - Combined air/electrical swivel - Google Patents
Combined air/electrical swivelInfo
- Publication number
- CA1204463A CA1204463A CA000426765A CA426765A CA1204463A CA 1204463 A CA1204463 A CA 1204463A CA 000426765 A CA000426765 A CA 000426765A CA 426765 A CA426765 A CA 426765A CA 1204463 A CA1204463 A CA 1204463A
- Authority
- CA
- Canada
- Prior art keywords
- swivel
- electrical
- air
- swivel body
- brush
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/64—Devices for uninterrupted current collection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/50—Couplings of the quick-acting type adjustable; allowing movement of the parts joined
- F16L37/53—Couplings of the quick-acting type adjustable; allowing movement of the parts joined allowing adjustment or movement only about the axis of one pipe
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A combined air/electrical swivel is described which includes interfitting and relatively rotatable swivel bodies which are locked together by a ball bearing assembly. The swivel is stabilized by means of a thrust bearing axially spaced from the ball bearing assembly. Electrical connection between the relatively rotatable swivel bodies is accomplished by means of slip rings on the one body which are contacted by brushes in the form of springs with split ends.
A combined air/electrical swivel is described which includes interfitting and relatively rotatable swivel bodies which are locked together by a ball bearing assembly. The swivel is stabilized by means of a thrust bearing axially spaced from the ball bearing assembly. Electrical connection between the relatively rotatable swivel bodies is accomplished by means of slip rings on the one body which are contacted by brushes in the form of springs with split ends.
Description
~L~0~53 This invention relates to a combined air/electrical swivel which allows unlimited rotational movement of a cable and air line in either direction without loss of air or introduction of electrical noise. It is intended to be used for communication and air supply for personnel wearing plastic suits for working in contaminated areas. It may also be used for robots and equipment requiring instrument air and electrical connection incorporated into one unit. It is not however restricted solely to these uses.
I Couplings which provide a rotatable connection and per-mix the transfer of electrical energy as well as air through the couplings are already known. There is for example, Canadian Patent Serial Number 872,125 issued June 1, 1971, to David F. Downy and entitled "Current Conducting Rotatable Air Flow Coupling for a Vacuum Cleaner". However, there is still need for a combined air/electrical swivel which is no-liable and rugged in construction and yet which contains a minimum number of separate parts and is easy to assemble.
In the air/electrical swivel of this invention, both air and electrical cabling are brought into the swivel fitting as paired, concentric or separate units. The main body of the swivel comprises an inner swivel body and outer swivel body which are intermitted along the common axis and which provide an air passage through the swivel from one end to the other. The inner and outer swivel bodies are rotatable with respect to one another about the longitudinal axis. A seal is used to seal the air passage at the junction of the inner and outer swivel bodies.
Electrical continuity is maintained during rotational movement by employing slip rings on the inner swivel body and split brushes which maintain electrical contact with the slip rings during rotation. The C-shaped brushes contact the rings on each side, and with the split brush ends four contacts per brush are obtained. I`
An important feature of the present invention which facilitates assembly is the ball bearing which maintains the inner and outer swivel bodies in spaced relationship in the radial direction. The arrangement, which will be described more fully hereinafter, is such as to not only provide a bearing but also to lock the inner and outer swivel bodies from separating in the axial direction after installation of the ball bearing.
A second important feature of the invention is a thrust bearing which provides a very stable connection between the inner and outer swivel bodies This bearing consists of a nylon sleeve fixed to the outer portion of the outer swivel body and making contact with a radial surface on the outer portion of the inner swivel body. Thus the stability is ox-twined by having the two bearing arrangements which are axially spaced from one another, viz., the ball bearing race and the nylon sleeve thrust bearing. Ease of rotation is provided by polishing the bearing surfaces of the thrust beating.
It is an object of the invention to provide a rugged and durable air/electrical swivel which contains a minimum number of parts and which is easy to assemble.
It is a further object of the invention to provide an air/electrical swivel of good stability.
In accordance with one aspect of the invention there is provided a confined air/electrical swivel comprising: an outer swivel body; an inner swivel body; said inner and outer swivel bodies being intermitted, being rotatable with respect to one another about a longitudinal axis, and being aperture along said axis to provide an air passage throughout the length of said combined air/electrical Sue; a plurality of electrically conductive slip rings fixedly mounted in no-lotion to said outer swivel body, each of said electrical brush means slid ably contacting one of said slip rings so as to provide continuous electrical connection between said inner and outer swivel bodies upon relative rotation thereof;
a plurality of electrical conductors connected to said slip rings; a plurality of electrical conductors connected to said brush means; a sealing ring of resilient material positioned along the sir passage between said inner and outer swivel bodies; ball bearing means located between said inner and outer swivel bodies and serving to retain said inner and outer swivel bodies from separating in the axial direction.
There is also provided in accordance with the invent lion a method of assembling an air/electrical swivel come prosing: providing a compressible insulating sleeve; placing said slip rings over said sleeve by first compressing said sleeve; installing said sleeve on said inner swivel body with the associated electrical conductors extending through an aperture in said inner swivel body; locating the air seal in said outer swivel body surrounding the end of the air passage therein; inserting said inner swivel body into said outer swivel body and forcing said inner and outer swivel bodies together to compress said air seal; while maintaining said air seal compressed inserting said ball bearing means; no-leasing the compressive force to lock said inner and outer swivel bodies together; fixing a thrust bearing and brush mount means on said outer swivel body with said thrust bearing in contact with a bearing surface of said inner swivel body.
An embodiment of the invention will now be described which is to be read in conjunction with the accompanying drawings in which:
Fig. 1 is a side view of the air/electrical swivel shown partly in section;
Fig. 2 is a right end view of the assembly as shown in Fig. l;
Fig. 3 is a cross-section of the inner swivel body shown in section;
Fig. 4 is a cross-section of the outer swivel body shown in section;
Fig. 5 is a cross-section of the assembly of the air/
electrical swivel taken along lines 5-5 of Fig l;
Fig. 6 is a cross-section of the assembly of the air/
elect rival swivel shown along the lines 6-6 of Fix. l;
I
Fig. 7 is a cross-section of the air/electrical swivel shown along lines 7-7 offing 1.
The combined air/electrical swivel as shown in the assembly of Fig. 1 comprises an inner swivel body 1 and an outer swivel body 2. An air passage extends longitudinally through each of the swivel bodies. The swivel bodies are in-terfitted so as to align the air passages and so provide a continuous air passage through the air/electrical swivel.
Air seal 3, which is located in a recess in the outer swivel body and which is contacted by the right end of the inner swivel body, prevents the egress of air between the inner and outer swivel bodies. The air seal is composed of a flexible material, e.g., polyurethane. It has the shape of a ring with a concave inner surface to permit it to flex more readily when it is compressed between the inner and outer swivel bodies.
A plurality of ball bearings 4 are located in a race formed between a cutout in a ring extending from the inner portion of the outer swivel body and another cutout in the outer surface of the inner swivel body. The two cutouts are so dimensioned and positioned that as explained hereinafter, the ball bearings are locked between the cutouts.
A thrust bearing and brush mount sleeve 8 is positioned over the outer swivel body and extends in the axial direction to contact the bearing surface 11 and surface 12 of the inner swivel body. In order to reduce friction and thus allow the swivel to rotate freely, the surface of the thrust bearing and surfaces 11 and 12 of the inner swivel body are polished. The thrust bearing and brush mount is fixed to the oilier swivel body by a plurality of screws 9.
The slip rings, of which there are three shown in Fig. 1, consist of metallic bands surrounding an insulating sleeve 5 which is preferably made of acrylic. The slip rings are mounted in parallel relation to one another in grooves on the outer surface of the insulating sleeve. The insulating sleeve is firmly fitted over the inner swivel body. The elect tribal conductors which are connected to the slip rings are brought out through apertures 17 in the inner swivel body.
The insulating body, as shown in cross-section in Fig. 5, is not a complete ring but rather has a gap in its circus-furriness in order that it may be compressed to permit the slip rings to be positioned over it and locked in position in the grooves (not shown).
A pair of brushes 10 contact each of the slip rings.
These brushes, as shown in Figs. 1 and 6, are mounted on the thrust bearing and mount, are of generally U-shaped configure-lion, and have their arms extending through apertures in the thrust bearing and mount to contact the slip rings. Each brush has a pair of arms which contact the associated slip ring on either side. The second brush of each pair contacts a slip ring at different portions of the circumference thereof than the first brush. Also, the brushes as shown in Fig. 1 have split ends so that each end of each brush contacts the associated slip ring at two points. This arrangement ensures good connection between the brushes and the slip rings at all positions of rotation.
The slip rings are composed of a highly resilient metallic material such as beryllium copper preferably flashed with gold.
Although three slip rings are shown, it is understood that the number may be either more or less than three. Like-wise although the ends of the brushes are shown as having two fingers, the number of fingers may be more than two.
Electrical conductors 10 are connected to the brushes, as e.g., by soldering, and hence rotate with the outer swivel body.
The inner and outer swivel bodies 1 and 2 are shown as having nipples for connection to air hoses. It is to be understood that other forms of connection to air lines are within the scope of the invention.
The assembly of the combined air/electrical swivel will now be described. The slip rings with connection wires attached are assembled onto the insulating sleeve 5 by come pressing the sleeve enough to allow the rings to be slipped over into the grooves in the sleeve. The sleeve with rings is then installed in the inner swivel body l with the wires passing through the aperture 17 in the inner swivel body. The inner swivel body is then inserted into the outer swivel body in which the air seal 3 has already been located as shown in Fig.
1. By applying compressive force to the inner and outer swivel bodies, and thereby compressing the air seal 3, all the ball bearings may be dropped through the loading hole 16 and located in the curved cutouts previously referred to and shown in Fig. 1. When the compressive force is removed the seal assumes its normal shape and the inner and outer swivel bodies withdraw slightly from one another by an amount of the order of 0.5 mm to prohibit the ball bearings from falling out.
This in turn locks the inner and outer swivel bodies in that the ball bearings prevent them from being withdrawn from one another in the axial direction. The thrust bearing and brush mount 8 is then pushed over the outer swivel body and fixed in place by screws 9. Each brush is then pushed into sleeve 3 through the apertures as above-noted to make contact with the slip rings. The two brushes which contact the same slip ring are then joined by soldering.
A test has been performed on a model constructed in accordance with the above-noted embodiment. In this test the air/electrical swivel was rotated 7,500 times in one direction and again an equal number of times in the opposite direction while air pressure in the passage within the swivel was main-twined at 90-100 pi In a second test the swivel was rotated 3,000 times while maintaining a lateral pressure of 10 lobs. upon it.
The swivel was found to be in good working condition after both of the above-noted tests.
The embodiment of the invention described in the fore-going is exemplary only. umber of-other variations of the fix structure will occur to those skilled in the art. The invent lion includes all such variations as would occur to such skilled person and is delineated not by the preceding example but solely by the appended claims.
I Couplings which provide a rotatable connection and per-mix the transfer of electrical energy as well as air through the couplings are already known. There is for example, Canadian Patent Serial Number 872,125 issued June 1, 1971, to David F. Downy and entitled "Current Conducting Rotatable Air Flow Coupling for a Vacuum Cleaner". However, there is still need for a combined air/electrical swivel which is no-liable and rugged in construction and yet which contains a minimum number of separate parts and is easy to assemble.
In the air/electrical swivel of this invention, both air and electrical cabling are brought into the swivel fitting as paired, concentric or separate units. The main body of the swivel comprises an inner swivel body and outer swivel body which are intermitted along the common axis and which provide an air passage through the swivel from one end to the other. The inner and outer swivel bodies are rotatable with respect to one another about the longitudinal axis. A seal is used to seal the air passage at the junction of the inner and outer swivel bodies.
Electrical continuity is maintained during rotational movement by employing slip rings on the inner swivel body and split brushes which maintain electrical contact with the slip rings during rotation. The C-shaped brushes contact the rings on each side, and with the split brush ends four contacts per brush are obtained. I`
An important feature of the present invention which facilitates assembly is the ball bearing which maintains the inner and outer swivel bodies in spaced relationship in the radial direction. The arrangement, which will be described more fully hereinafter, is such as to not only provide a bearing but also to lock the inner and outer swivel bodies from separating in the axial direction after installation of the ball bearing.
A second important feature of the invention is a thrust bearing which provides a very stable connection between the inner and outer swivel bodies This bearing consists of a nylon sleeve fixed to the outer portion of the outer swivel body and making contact with a radial surface on the outer portion of the inner swivel body. Thus the stability is ox-twined by having the two bearing arrangements which are axially spaced from one another, viz., the ball bearing race and the nylon sleeve thrust bearing. Ease of rotation is provided by polishing the bearing surfaces of the thrust beating.
It is an object of the invention to provide a rugged and durable air/electrical swivel which contains a minimum number of parts and which is easy to assemble.
It is a further object of the invention to provide an air/electrical swivel of good stability.
In accordance with one aspect of the invention there is provided a confined air/electrical swivel comprising: an outer swivel body; an inner swivel body; said inner and outer swivel bodies being intermitted, being rotatable with respect to one another about a longitudinal axis, and being aperture along said axis to provide an air passage throughout the length of said combined air/electrical Sue; a plurality of electrically conductive slip rings fixedly mounted in no-lotion to said outer swivel body, each of said electrical brush means slid ably contacting one of said slip rings so as to provide continuous electrical connection between said inner and outer swivel bodies upon relative rotation thereof;
a plurality of electrical conductors connected to said slip rings; a plurality of electrical conductors connected to said brush means; a sealing ring of resilient material positioned along the sir passage between said inner and outer swivel bodies; ball bearing means located between said inner and outer swivel bodies and serving to retain said inner and outer swivel bodies from separating in the axial direction.
There is also provided in accordance with the invent lion a method of assembling an air/electrical swivel come prosing: providing a compressible insulating sleeve; placing said slip rings over said sleeve by first compressing said sleeve; installing said sleeve on said inner swivel body with the associated electrical conductors extending through an aperture in said inner swivel body; locating the air seal in said outer swivel body surrounding the end of the air passage therein; inserting said inner swivel body into said outer swivel body and forcing said inner and outer swivel bodies together to compress said air seal; while maintaining said air seal compressed inserting said ball bearing means; no-leasing the compressive force to lock said inner and outer swivel bodies together; fixing a thrust bearing and brush mount means on said outer swivel body with said thrust bearing in contact with a bearing surface of said inner swivel body.
An embodiment of the invention will now be described which is to be read in conjunction with the accompanying drawings in which:
Fig. 1 is a side view of the air/electrical swivel shown partly in section;
Fig. 2 is a right end view of the assembly as shown in Fig. l;
Fig. 3 is a cross-section of the inner swivel body shown in section;
Fig. 4 is a cross-section of the outer swivel body shown in section;
Fig. 5 is a cross-section of the assembly of the air/
electrical swivel taken along lines 5-5 of Fig l;
Fig. 6 is a cross-section of the assembly of the air/
elect rival swivel shown along the lines 6-6 of Fix. l;
I
Fig. 7 is a cross-section of the air/electrical swivel shown along lines 7-7 offing 1.
The combined air/electrical swivel as shown in the assembly of Fig. 1 comprises an inner swivel body 1 and an outer swivel body 2. An air passage extends longitudinally through each of the swivel bodies. The swivel bodies are in-terfitted so as to align the air passages and so provide a continuous air passage through the air/electrical swivel.
Air seal 3, which is located in a recess in the outer swivel body and which is contacted by the right end of the inner swivel body, prevents the egress of air between the inner and outer swivel bodies. The air seal is composed of a flexible material, e.g., polyurethane. It has the shape of a ring with a concave inner surface to permit it to flex more readily when it is compressed between the inner and outer swivel bodies.
A plurality of ball bearings 4 are located in a race formed between a cutout in a ring extending from the inner portion of the outer swivel body and another cutout in the outer surface of the inner swivel body. The two cutouts are so dimensioned and positioned that as explained hereinafter, the ball bearings are locked between the cutouts.
A thrust bearing and brush mount sleeve 8 is positioned over the outer swivel body and extends in the axial direction to contact the bearing surface 11 and surface 12 of the inner swivel body. In order to reduce friction and thus allow the swivel to rotate freely, the surface of the thrust bearing and surfaces 11 and 12 of the inner swivel body are polished. The thrust bearing and brush mount is fixed to the oilier swivel body by a plurality of screws 9.
The slip rings, of which there are three shown in Fig. 1, consist of metallic bands surrounding an insulating sleeve 5 which is preferably made of acrylic. The slip rings are mounted in parallel relation to one another in grooves on the outer surface of the insulating sleeve. The insulating sleeve is firmly fitted over the inner swivel body. The elect tribal conductors which are connected to the slip rings are brought out through apertures 17 in the inner swivel body.
The insulating body, as shown in cross-section in Fig. 5, is not a complete ring but rather has a gap in its circus-furriness in order that it may be compressed to permit the slip rings to be positioned over it and locked in position in the grooves (not shown).
A pair of brushes 10 contact each of the slip rings.
These brushes, as shown in Figs. 1 and 6, are mounted on the thrust bearing and mount, are of generally U-shaped configure-lion, and have their arms extending through apertures in the thrust bearing and mount to contact the slip rings. Each brush has a pair of arms which contact the associated slip ring on either side. The second brush of each pair contacts a slip ring at different portions of the circumference thereof than the first brush. Also, the brushes as shown in Fig. 1 have split ends so that each end of each brush contacts the associated slip ring at two points. This arrangement ensures good connection between the brushes and the slip rings at all positions of rotation.
The slip rings are composed of a highly resilient metallic material such as beryllium copper preferably flashed with gold.
Although three slip rings are shown, it is understood that the number may be either more or less than three. Like-wise although the ends of the brushes are shown as having two fingers, the number of fingers may be more than two.
Electrical conductors 10 are connected to the brushes, as e.g., by soldering, and hence rotate with the outer swivel body.
The inner and outer swivel bodies 1 and 2 are shown as having nipples for connection to air hoses. It is to be understood that other forms of connection to air lines are within the scope of the invention.
The assembly of the combined air/electrical swivel will now be described. The slip rings with connection wires attached are assembled onto the insulating sleeve 5 by come pressing the sleeve enough to allow the rings to be slipped over into the grooves in the sleeve. The sleeve with rings is then installed in the inner swivel body l with the wires passing through the aperture 17 in the inner swivel body. The inner swivel body is then inserted into the outer swivel body in which the air seal 3 has already been located as shown in Fig.
1. By applying compressive force to the inner and outer swivel bodies, and thereby compressing the air seal 3, all the ball bearings may be dropped through the loading hole 16 and located in the curved cutouts previously referred to and shown in Fig. 1. When the compressive force is removed the seal assumes its normal shape and the inner and outer swivel bodies withdraw slightly from one another by an amount of the order of 0.5 mm to prohibit the ball bearings from falling out.
This in turn locks the inner and outer swivel bodies in that the ball bearings prevent them from being withdrawn from one another in the axial direction. The thrust bearing and brush mount 8 is then pushed over the outer swivel body and fixed in place by screws 9. Each brush is then pushed into sleeve 3 through the apertures as above-noted to make contact with the slip rings. The two brushes which contact the same slip ring are then joined by soldering.
A test has been performed on a model constructed in accordance with the above-noted embodiment. In this test the air/electrical swivel was rotated 7,500 times in one direction and again an equal number of times in the opposite direction while air pressure in the passage within the swivel was main-twined at 90-100 pi In a second test the swivel was rotated 3,000 times while maintaining a lateral pressure of 10 lobs. upon it.
The swivel was found to be in good working condition after both of the above-noted tests.
The embodiment of the invention described in the fore-going is exemplary only. umber of-other variations of the fix structure will occur to those skilled in the art. The invent lion includes all such variations as would occur to such skilled person and is delineated not by the preceding example but solely by the appended claims.
Claims (10)
1. A combined air/electrical swivel comprising:
an outer swivel body;
an inner swivel body;
said inner and outer swivel bodies being interfitted, being rotatable with respect to one another about a longitu-dinal axis, and being apertured along said axis to provide an air passage throughout the length of said air combined air/electrical swivel;
a plurality of electrically conductive slip rings fixedly mounted in relation to said inner swivel body;
a plurality of electrical brush means fixedly mounted in relation to said outer swivel body, each of said electrical brush means slidably contacting one of said slip rings so as to provide continuous electrical connection between said inner and outer swivel bodies upon relative rotation thereof;
a plurality of electrical conductors connected to said slip rings;
a plurality of electrical conductors connected to said brush means;
a sealing ring of resilient material positioned along the air passage between said inner and outer swivel bodies;
ball bearing means located between said inner and outer swivel bodies and serving to retain said inner and outer swivel bodies from separating in the axial direction.
an outer swivel body;
an inner swivel body;
said inner and outer swivel bodies being interfitted, being rotatable with respect to one another about a longitu-dinal axis, and being apertured along said axis to provide an air passage throughout the length of said air combined air/electrical swivel;
a plurality of electrically conductive slip rings fixedly mounted in relation to said inner swivel body;
a plurality of electrical brush means fixedly mounted in relation to said outer swivel body, each of said electrical brush means slidably contacting one of said slip rings so as to provide continuous electrical connection between said inner and outer swivel bodies upon relative rotation thereof;
a plurality of electrical conductors connected to said slip rings;
a plurality of electrical conductors connected to said brush means;
a sealing ring of resilient material positioned along the air passage between said inner and outer swivel bodies;
ball bearing means located between said inner and outer swivel bodies and serving to retain said inner and outer swivel bodies from separating in the axial direction.
2. A combined air/electrical swivel as claimed in claim 1 further comprising thrust bearing and brush mount means mounted on said outer swivel body and contacting a bearing surface on said inner swivel body.
3. A combined air/electrical swivel as claimed in claim 2 wherein said brush means comprises a plurality of pairs of electrical brushes mounted on said thrust bearing and brush mount means, each pair of electrical brushes con-tacting one of said slip rings at different circumferential portions thereof.
4. A combine air/electrical swivel as claimed in any one of claims 1, 2 or 3 wherein each of said brush means comprises a generally U-shaped spring the arms of which make resilient contact with the associated slip ring on opposite sides thereof.
5. A combined air/electrical swivel as claimed in any one of claims 1, 2 or 3 wherein said brush means are composed of beryllium copper with a flash coating of gold.
6. A combined air/electrical swivel as claimed in any one of claims 1, 2 or 3 wherein said brush means comprise resilient metallic springs the contact portions of which are split to form finger contacts.
7. A combined air/electrical swivel as claimed in any one of claims 1, 2 or 3 further comprising an insulating sleeve fixed on said inner swivel body, said slip rings being mounted on said insulating sleeve.
8. A combined air/electrical swivel as claimed in claims 1, 2, or 3 wherein said sealing ring is composed of a poly-urethane material.
9. A combined air/electrical swivel as claimed in claim 2 or claim 3 wherein said thrust bearing and brush mount means comprises nylon.
10. A method of assembling a combined air/electrical swivel as claimed in claim 1 comprising:
providing a compressible insulating sleeve;
placing said slip rings over said sleeve by first compressing said sleeve;
installing said sleeve on said inner swivel body with the associated electrical conductors extending through an aperture in said inner swivel body;
locating the air seal in said outer swivel body sur-rounding the end of the air passage therein;
inserting said inner swivel body into said outer swivel body and forcing said inner and outer swivel bodies together to compress said air seal;
while maintaining said air seal compressed inserting said ball bearing means;
releasing the compressive force to lock said inner and outer swivel bodies together;
fixing a thrust bearing and brush mount means on said outer swivel body with said thrust bearing in contact with a bearing surface of said inner swivel body;
inserting said plurality of electrical brush means through apertures in said thrust bearing and mount means so as to contact said slip rings.
providing a compressible insulating sleeve;
placing said slip rings over said sleeve by first compressing said sleeve;
installing said sleeve on said inner swivel body with the associated electrical conductors extending through an aperture in said inner swivel body;
locating the air seal in said outer swivel body sur-rounding the end of the air passage therein;
inserting said inner swivel body into said outer swivel body and forcing said inner and outer swivel bodies together to compress said air seal;
while maintaining said air seal compressed inserting said ball bearing means;
releasing the compressive force to lock said inner and outer swivel bodies together;
fixing a thrust bearing and brush mount means on said outer swivel body with said thrust bearing in contact with a bearing surface of said inner swivel body;
inserting said plurality of electrical brush means through apertures in said thrust bearing and mount means so as to contact said slip rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000426765A CA1204463A (en) | 1983-04-26 | 1983-04-26 | Combined air/electrical swivel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000426765A CA1204463A (en) | 1983-04-26 | 1983-04-26 | Combined air/electrical swivel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1204463A true CA1204463A (en) | 1986-05-13 |
Family
ID=4125106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000426765A Expired CA1204463A (en) | 1983-04-26 | 1983-04-26 | Combined air/electrical swivel |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1204463A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016095959A1 (en) * | 2014-12-16 | 2016-06-23 | Aktiebolaget Skf | Bearing arrangement |
| CN114961679A (en) * | 2021-07-14 | 2022-08-30 | 江苏孚杰高端装备制造(集团)股份有限公司 | FY-3 type quick rotating joint device for oil fracturing exploitation |
-
1983
- 1983-04-26 CA CA000426765A patent/CA1204463A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016095959A1 (en) * | 2014-12-16 | 2016-06-23 | Aktiebolaget Skf | Bearing arrangement |
| CN114961679A (en) * | 2021-07-14 | 2022-08-30 | 江苏孚杰高端装备制造(集团)股份有限公司 | FY-3 type quick rotating joint device for oil fracturing exploitation |
| CN114961679B (en) * | 2021-07-14 | 2023-11-17 | 江苏孚杰高端装备制造(集团)股份有限公司 | FY-3 type quick rotary joint device for petroleum fracturing exploitation |
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