| 摘要 |
A vacuum pump includes a cylinder. The cylinder includes an inner casing forming two transversely intersected, parallel cylindrical chambers, the axes of which rest in one plane, and one of the faces of which represents a wall on which a suction hole inlet is located. The cylinder also includes an outer casing disposed around the inner casing to form a confined space, provided with the inlet and an outlet, which allows a liquid to be circulated. Two pump rotors are situated in the parallel cylindrical chambers and are driven in rotation by an electric motor. A drive housing contains the motor and components for driving and synchronizing the pump rotors supporting the rotors by cantilever and serving as support and centering with respect to the cylinder. The drive housing includes two extended supports that are integrally constructed as one piece. First and second guide elements guide rotation of the rotors, which guide elements support the rotors by cantilever, wherein the first guide elements are situated at the ends of the two extended supports. |
| 主权项 |
1. Vacuum pump for applications in vacuum packaging machines, comprising:
a cylinder, including
an inner casing forming two transversely intersected, parallel cylindrical chambers, the axes of which rest in one horizontal plane, and one of the faces of which represents a wall on which a suction hole inlet is located, andan outer casing disposed around said inner casing to form a confined space, which allows a liquid to be circulated, carrying out thermal exchange, said outer casing being provided with said suction hole inlet and an outlet,wherein said cylinder is integrally formed of one piece, an electric motor, two pump rotors including screw portions, said pump rotors being situated such that said screw portions are completely contained in the parallel cylindrical chambers and driven in rotation by said motor, each of said pump rotors including a central opening, a drive housing containing components for driving and synchronizing said pump rotors supporting said rotors by cantilever and serving as support and centering with respect to the cylinder, said drive housing including the following integral construction: two extended supports and a mounting surface, said two extended supports being tubular and disposed in said central openings of said pump rotors, first guide elements and second guide elements for guiding rotation of the rotors, the first and second guide elements support the rotors by cantilever, wherein said first guide elements are situated at the ends of said two extended supports and said second guide elements are incorporated in said drive housing, and wherein said cylinder rests against and is fastened to said mounting surface of said drive housing. |
