Abstract: The invention pertains to a dry vacuum pump comprising at least one rotating shaft (11) mounted on at least one lubricated bearing (5) and at least one sealing device (9) for sealing off lubricating fluids capable of entering the shaft passage from said bearing (5), said sealing device (9) being installed between the lubricated bearing (5) and a dry pumping stage (7), characterized in that said sealing device (9) comprises a centrifuge element (17) designed to rotate in unison on said shaft (11) and comprising at least one through line (19) capable of separating the lubricating fluids from the fluid that may travel from said bearing (5) to the dry pumping stage (7).

Abstract: The invention pertains to a dry vacuum pump comprising at least one rotating shaft (11) mounted on at least one lubricated bearing (5) and at least one sealing device (9) for sealing off lubricating fluids capable of entering the shaft passage from said bearing (5), said sealing device (9) being installed between the lubricated bearing (5) and a dry pumping stage (7), characterized in that said sealing device (9) comprises a centrifuge element (17) designed to rotate in unison on said shaft (11) and comprising at least one through line (19) capable of separating the lubricating fluids from the fluid that may travel from said bearing (5) to the dry pumping stage (7).

Abstract: The invention concerns a vacuum generating device wherein the vacuum pump body (1) comprises cavities forming regulating chambers (12), closed at their ends by closure means such as sealing plugs (26, 27), and run through by an exchange pipe (14) wherein flows a liquid coolant coming from a heat source. The regulating chamber (12) is connected by a pipe wherein thermal conduction liquid (16) flows to a reserve of thermal conduction liquid (17) which through a piston (18) stressed by an actuator (19), adjusts the upper level (22) of a thermal conduction liquid (15) in the regulating chamber (12), thereby modifying the thermal conductance between the pump body (1) and the liquid coolant flowing in the exchange pipe (14). Thus the risk of scale deposit is reduced in the exchange pipe (14) of a vacuum pump (1), while controlling the temperature of the pump body (1).

Abstract: The invention concerns a pumping unit wherein the vacuum pump (100) is driven by a motor (3, 4) comprised in a common monobloc housing forming motor housing (5) and oil pan (18) containing a gear assembly (17) for coupling two parallel pump rotors (14). To complement the sealing conditions provided by a dynamic seal (6), the motor stator (4) consists of an electric coil embedded in an oil-tight and gas-tight resin, thereby not requiring other more expensive and bulky sealing means, reducing production cost and enhancing the pumping unit dependability.

Abstract: In accordance with the invention, the vacuum pump cooling system includes tubes expanded along their entire length in bores through the vacuum pump body. The tubes can be made of stainless steel, and inserted into a vacuum pump body made of cast iron. This prevents the risk of corrosion of the vacuum pump body by a cooling liquid passing through the tubes to cool the vacuum pump body.

Abstract: The invention concerns a pumping unit wherein the vacuum pump (100) is driven by a motor (3, 4) comprised in a common monobloc housing forming motor housing (5) and oil pan (18) containing a gear assembly (17) for coupling two parallel pump rotors (14). To complement the sealing conditions provided by a dynamic seal (6), the motor stator (4) consists of an electric coil embedded in an oil-tight and gas-tight resin, thereby not requiring other more expensive and bulky sealing means, reducing production cost and enhancing the pumping unit dependability.

Abstract: The invention concerns a vacuum generating device wherein the vacuum pump body (1) comprises cavities forming regulating chambers (12), closed at their ends by closure means such as sealing plus (26, 27), and run through by an exchange pipe (14) wherein flows a liquid coolant coming from a heat source. The regulating chamber (12) is connected by a pipe wherein flows thermal conduction liquid (17) which, through a piston (18) stressed by an actuator (19), adjusts the upper level (22) of a thermal conduction liquid (1) in the regulating chamber (12), thereby modifying the thermal conductance between the pump body (1) and the liquid coolant flowing in the exchange pipe (14). Thus the risk of scale deposit is reduced in the exchange pipe (14) of a vacuum pump (1), while controlling the temperature of the pump body (1).

Abstract: A vacuum-generating device including at least one vacuum pump associated with a suction pipe and with a delivery pipe, at least a portion of the vacuum-generating device is separated from the ambient atmosphere by a volume in which a suitable vacuum prevails. The solution is applicable in particular to delivery pipes of primary pumps, and it makes it possible to prevent the pumped gases from condensing and solidifying, while also reducing the noise given off.

Abstract: In accordance with the invention, the vacuum pump cooling system includes tubes expanded along their entire length in bores through the vacuum pump body. The tubes can be made of stainless steel, and inserted into a vacuum pump body made of cast iron. This prevents the risk of corrosion of the vacuum pump body by a cooling liquid passing through the tubes to cool the vacuum pump body.