US3968969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing arrangement
Assignee: Individual
•
Filing: 1975-02-26
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Granted: 1976-07-13
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Expires: 1995-02-26
Abstract
Abstract In a mechanical seal with rubbing slide ring and counter ring elements, an annular distributor guiding element which defines the annular channel guiding coolant and lubricating liquid to the interface between the elements is axially displaceable between limiting stops. The distributor guiding element tapers inwardly to define an inner orifice closely surrounding one of said ring elements or a ring form holder therefore to define an annular passage which constitutes a liquid flow regulating area.
Inventors
- 👤 Ehrhard Mayer
- 👤 Ludwig Findler
- 👤 Wolfgang Mathes
- 👤 Michael Steigenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:01
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/162; F16J15/34; F16J15/3404; Y; Y10; Y10S; Y10S277/00; Y10S277/93
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
187 words
Mechanical seal assembly for an axially extending elongated shaft comprising, means defining an annular slide ring seal with rubbing slide ring and counter ring elements, means defining a housing containing said seal and rotationally fixedly mounting said slide ring, said counter ring being mountable on said shaft via counter ring support structure, means defining a coolant circuit that conducts a coolant through the seal housing in an axial direction and including a pump device with inlet and outlet ends for pumping coolant liquid through the circuit, which circuit further comprises an annular space surrounding said seal and distributor guiding means that conduct the coolant to an edge of the sealing interface of the slide ring and counter ring within said annular space and which are sealed with respect to the seal housing, and further comprising means for supporting and displacing the distributor guiding means in said axial direction and constructed and arranged to maintain the distributor guiding means at a constant axial distance from the slide ring, the slide ring being mounted in the seal housing in a rotationally fixed manner and being axially displaceable against springs.
Claim 2
Dependent Claim
187 words
Mechanical seal assembly for an axially extending elongated shaft comprising, means defining an annular slide ring seal with rubbing slide ring and counter ring elements, means defining a housing containing said seal and rotationally fixedly mounting said slide ring, said counter ring being mountable on said shaft via counter ring support structure, means defining a coolant circuit that conducts a coolant through the seal housing in an axial direction and including a pump device with inlet and outlet ends for pumping coolant liquid through the circuit, which circuit further comprises an annular space surrounding said seal and distributor guiding means that conduct the coolant to an edge of the sealing interface of the slide ring and counter ring within said annular space and which are sealed with respect to the seal housing, and further comprising means for supporting and displacing the distributor guiding means in said axial direction and constructed and arranged to maintain the distributor guiding means at a constant axial distance from the slide ring, the slide ring being mounted in the seal housing in a rotationally fixed manner and being axially displaceable against springs.
Claim 3
Dependent Claim
83 words
Mechanical seal assembly in accordance with claim 1 wherein the distributor guiding means comprises an annulus shape surrounding the slide ring and being closely spaced therefrom and also being downstream of the pump outlet and wherein the radial inside width of the radial annular gap formed between the distributor guiding means and the periphery of the slide ring is of such a size in relation to the pump device that the flow speed of the coolant is greater than 20 centimeters per second.
Claim 4
Dependent Claim
36 words
Mechanical seal assembly as claimed in claim 2, wherein the annular gap formed between the distributor guiding means and the outer periphery of the slide ring has a radial inside width of less than 4 millimeters.
Claim 5
Dependent Claim
96 words
Mechanical seal assembly in accordance with claim 2 and further comprising means defining an axially extending bore within said annular space and wherein the distributor guiding means are slidingly guided in said bore and are prestressed in a direction toward the slide ring, and means defining butting engagement of the distributor guiding means against the slide ring support structure via spacing pieces in such a manner that there remains a radial channel between the support structure and distributor which is joined to said annular gap and which is connected to an exit in the seal housing.
Claim 6
Dependent Claim
54 words
Mechanical seal assembly in accordance with claim 2 wherein the distributor guiding means are fastened immovably to the slide ring structure and define therewith a radial channel for radial outward movement of coolant from the seal which is joined to said annular gap and which is connected to an exit of the seal housing.
Claim 7
Dependent Claim
103 words
Mechanical seal assembly in accordance with claim 5 wherein the diameter of the peripheral surface acting to seal off the distributor guiding means with respect to the seal housing defines the outer end of said radial channel and is chosen in accordance with the degree of a desired influence of the bearing force of the slide ring against the counter ring as a function of the volume of the coolant conducted past said annular gap, with the degree of the influence rising with increasing deviation of diameter from a mean diameter of the annular gap between the distributor guiding means and slide ring.
Claim 8
Dependent Claim
51 words
Mechanical seal assembly in accordance with claim 6 wherein a flow direction of the coolant from the counter ring to the slide ring is provided to influence the bearing force in the sense of a reduction and that an opposite flow direction is provided to influence it in the reverse sense.
Claim 9
Dependent Claim
101 words
Mechanical seal assembly in accordance with claim 1 wherein the pump device is formed as a screw-thread pump which is arranged inside the seal housing and comprising an outer thread and an inner thread of opposite hand surrounding it coaxially with slight radial play on opposing cylindrical surfaces, one of which is connected rigidly to the seal housing and the other of which rotates with a shaft to be sealed off by said seal and has a pitch direction opposite to the shaft rotation direction to reduce the bearing force of the counter ring with increasing rotation speed of the shaft.
Claim 10
Dependent Claim
100 words
Mechanical seal assembly in accordance with claim 1 wherein the pump device is formed as a screw thread pump which is arranged inside the seal housing and comprises an outer thread and an inner thread of opposite hand surrounding coaxially with slight radial play on opposing cylindrical surfaces one of which is connected rigidly to the seal housing and the other of which rotates with a shaft to be sealed off by said seal and has the same pitch direction as the shaft rotation direction to raise bearing force of the counter ring with increasing rotation speed of the shaft.
Claim 11
Dependent Claim
29 words
Mechanical seal assembly in accordance with claim 1 wherein the distributor guiding means consists essentially of a tubular part and a flangetype part directed radially inward from the latter.
Claim 12
Dependent Claim
55 words
Mechanical seal assembly in accordance with claim 10 wherein the tubular part of the distributor guiding means with an outer cylindrical peripheral surface is displaceably guided in a bore formed in a bushing in the seal housing, and that the seal of the distributor guiding means is arranged between this peripheral surface and the bore.
Claim 13
Dependent Claim
88 words
Mechanical seal assembly in accordance with claim 10 wherein a tubular part projects from each axial side of the flangetype part, that one tubular part is pushed onto the support ring of the slide ring and is sealingly fastened and adjacent to the flangetype part, is broken through by at least one slit, and that the other tubular part forms a contactless seal by entering with slight radial play into an annular space which is open in the axial direction and which is formed in the seal housing.
Claim 14
Dependent Claim
33 words
Mechanical seal assembly in accordance with claim 12 wherein unconnected annular grooves are cut into the inner and/or outer peripheral surface of the section of the tubular part entering into the annular space.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |