TH10067A - Dry skid ring seals for rotating parts and rotating machines equipped with such seals. - Google Patents

Abstract

Dry skid ring seals for rotating parts and rotating machinery that are assembled with such seals, the stationary housing (8) and the rotating housing (4) that make up the seal have an internal conditioning circuit (9, 13). This invention is applied in particular to applications of machinery involving fluids.

Claims (6)

1. Dry Sliding Ring Seals for Rotating Components are assembled together with: - A stationary sub-assembly (8,7) supported by a stationary part (3) relative to a rotating part (1) which rotates around a shaft ( ). - A rotating sub-assembly (4,5) supported by the rotating part and working in conjunction with the stationary assembly to prevent fluid from being confined between these stationary and rotating parts. - Each set of the stationary and rotating sub-assemblies is assembled together with: - A stationary housing (8) or a rotating housing (4) supported by a stationary part (3) or a rotating part (1) which is opposite to the rotating part or rotating part. A stationary housing of another subassembly - and having at least one and two stationary ring seals (7, 7A, 7B) or the first and second sliding ring seals (5, 5A, 5B) driven axially in conjunction with the shaft (A) by the stationary housing or the rotating housing to act in conjunction with the first and second rotating ring seals or the first and second stationary ring seals of another subassembly in such a manner to eliminate the fluid passage being confined while making up at least one central chamber (14,15) which consists of two main walls (16,17) respectively made up of the stationary housing and both rotating housings and has end walls made up of at least one stationary ring (7) and a sliding ring - a seal of the characteristic that has at least one piece of the stationary housing (18) and the rotating housing (4) incorporating the conditioning circuit (9,4A,13) inside this housing. and to enable the circulation of the conditioning fluid so that the housing consists of a stationary housing (8) which is both conditioning and acting as a conditioner, which will perform at least one O-ring seal (7, 7A, 7B) and at least part of the rotating housing (4) or the stationary housing. 2. The dry sliding ring seal as described in Requisition 1 is characterized by a stationary housing (8) that is conditioned and self-conditioning and consists of conditioning wings (11p) protruding into the central chamber (14) and a main wall plate (16) made up of this housing to condition the fluid contained within this chamber so that this fluid will condition at least one sliding ring seal (5A, 5B) and/or the rotating housing (4) or the stationary housing. 3. The dry skid ring seal as described in Reputation 1 is characterized in that the first and second and third stationary rings (7, 7A, 7B) and the first, second and third skid ring seals (5, 5A, 5B) are arranged in sequence along the longitudinal axis of the shaft (A), which together constitute the length of the dry skid ring seal; an internal conditioning circuit comprises an exit groove (9) and a return groove (9A) which extend almost the entire length of the dry skid ring seal; an exit connection (10) and a return connection (10A) which connect these grooves to the external conditioning fluid circuit and which is located at the position of the connection face (8A), which is the longitudinal end face of the stationary housing (8) being conditioned; and an internal connection groove (13) which connects the exit and return grooves into the area of the longitudinal end face (8b) of the dry skid ring seal opposite the connection face. 4. A dry sliding ring seal as specified in claim 3, where the rotating part is the shaft (1) supporting the rotating housing (4p - stationary housing (8), which is positioned around the rotating housing and forms the said conditioned housing. 5. A rotating machine incorporating - a working part (22) which rotates within a cover (30) for the purpose of being driven or driven by a fluid contained within this cover; - a rotating shaft (1) extending through the cover to support the working part and passing through this cover; - at least one bearing (24, 26) to support the shaft; - a lubrication circuit consisting of an outlet (28) and a return (29) for the purpose of lubricating the bearings with a lubricating fluid; - and at least one dry seal (20, 21) placed around the shaft (1) at a position transversely through the cover to contain the fluid within; - This machine is characterized by such a dry seal (20) being a dry sliding ring seal as described in Claim 1. Such conditioning fluid is a fluid used for lubrication. 6. The rotating machine is composed of: - a working part (72) which rotates within the enclosure (80) to be driven or driven by a fluid contained within a chamber. The pressure of the fluid contained within this enclosure consists of a relatively high pressure region (9) and a relatively low pressure region (92). - a rotating shaft (51) extends within the enclosure to support the working part and passes through this enclosure. - and there is at least one dry seal (70, 71) mounted around such shaft at the location where it passes through the enclosure to contain the fluid. The machine is characterized by such a dry seal (70, 71) as a dry sliding ring seal as described in Reputation 1 above. The conditioning fluid is the fluid to be contained. The internal conditioning circuit of the conditioning housing is fed by an external conditioning feed circuit consisting of a pipe (91) to draw the fluid to be contained into the pressure region. The pressure is relatively high (90) and the pipe (93) is used to return the fluid to a relatively low pressure area (92) (6 claims, 4 pages, 4 figures).