Pipe joints or couplings – Having plural independent paths – Allowing relative motion of pipes
Patent
1998-04-27
1999-11-30
Nicholson, Eric K
Pipe joints or couplings
Having plural independent paths
Allowing relative motion of pipes
285279, 2851214, 277379, F16L 2700
Patent
active
059929014
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates is directed to a device for coupling the coolant duct of a rotating part.
2. Description of the Prior Art
Reference DE-PS 42 07 042 discloses a generic device for coupling the coolant duct of a back-up and transporting roll. This device is supported by pins in bearing blocks or pillow blocks by roller bearings, and coolant flows through the device along an axial bore hole that is guided through the pins. Every bearing block is closed by a cover. The cover has a cooling duct which is connected at one end to a coolant inlet and coolant outlet, respectively. The other end opens into the region of the pin bore hole. A compensator is arranged between the duct opening of the cover and the bore hole of the roll and cooperates with a seal which coaxially contacts a sealing face arranged relative to the roll shaft. The seal is preferably constructed as a lip seal.
It is disadvantageous in this construction that the sealing lip of the sealing ring is subject to wear because of the movement occurring on it and therefore has a limited life. Further, the attainable temperature range is limited because lip sealing rings are usually made from elastomers. Moreover, the compensator cannot be pretensioned in a deliberate manner, so that it is not possible to adapt to different internal pressures of the coolant.
SUMMARY OF THE INVENTION
It is the object of the invention to provide a long-lasting device of the generic type by which the described disadvantages of the prior art are avoided. This object is met by a device for coupling the coolant duct of a rotating part which is rotatably supported in a bearing by a journal. The journal is connected to a cooling duct which connects a bore hole through the journal to an inlet or an outlet for the coolant. A resilient compensator is arranged between the coolant inlet or outlet and the bore hole of the journal to prevent motion between the journal and stationary parts. The end of the compensator facing the journal is rotatably fixed by connection to the journal. The end of the compensator that is remote from the rotating part is rotatably fixed to a sliding ring of a sliding ring seal. A stationary sliding ring of the sliding ring seal is supported on a receptacle sleeve which is detachably connected to the frame part and encloses the compensator. The position of the receptacle sleeve with respect to the journal is changeable to suitably pretension the compensator.
This object is met by the features indicated in the characterizing part of claim 1. Advantageous further developments are contained in the subclaims.
The advantage of the suggested construction consists in that the range of use can be considerably increased through the use of an axially acting sliding ring seal. The temperature limitation which was formerly customary due to the use of an elastomer for the lip seal is eliminated in this case. The service life of the device is significantly extended, since the rate of wear of a sliding ring seal is substantially lower than that of a lip seal. The hard, wear-resistant material used for the sliding ring seal, e.g., silicon carbide, is capable of pulverizing particles of dirt that may be carried along by the coolant. The arrangement of the compensator together with the sliding ring seal in a receptacle sleeve enables the pretensioning by varying the distance of the cover-like flange from the frame element of the bearing of the rotating part. This varying of pretensioning is used advantageously to adapt the action of the internal pressure of the coolant to the action of the compensator.
The suggested device may be adapted for use in both high-speed and low-speed rolls, rollers or the like, by the choice of material as well as by the size of the sealing surface of the sliding ring seal. Possible leakage of the coolant in the area of the sliding ring seal is easily be removed through an opening arranged, for example, in the cover-like flange. This prevents the undesirable mixing of the coolant with t
REFERENCES:
patent: 1586725 (1926-06-01), Westinghouse et al.
patent: 2673748 (1954-03-01), Shaw
patent: 2794659 (1957-06-01), Bily
patent: 3501174 (1970-03-01), Walker
patent: 4477088 (1984-10-01), Picard
patent: 5011166 (1991-04-01), Watts
Divjak Franz-Josef
Gohres Hans-Werner
Lenk Rainer
Mannesmann AG
Nicholson Eric K
LandOfFree
Device for coupling a coolant duct of a rotating part does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for coupling a coolant duct of a rotating part, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for coupling a coolant duct of a rotating part will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1662785