Roll drive for paper machines and the like
AssigneeValmet Corporation
InventorsMartti Matikainen, Juhani Ovaska
Life of this patent
Estimating the term…
Abstract
A roll drive for a machine of the type used in connection with the manufacture of paper. The roll which is to be driven has an end situated at a plane which is normal to the roll axis, and at the latter plane there is a supporting structure which supports the roll for rotation about its axis. Closely adjacent to this plane is a planetary gear transmission having an output and an input. The latter output is connected by way of a suitable transmission structure to the end of the roll for driving the latter with the output of the planetary gear transmission, while a rotary drive is connected to the input of the planetary gear transmission for driving the roll through the latter transmission and structure connected between the planetary gear transmission and the end of the roll.
Claims9
In a machine which has a roll which is to be rotated about its axis, such as a machine of the type used in connection with the manufacture of paper, said roll having an end situated at a plane which is normal to said roll axis, and support means situated at said plane for supporting said roll at said end thereof for rotation about said axis, planetary gear transmission means situated adjacent to said plane and having an output and an input, connecting means connecting said output of said planetary gear transmission means to said end of said roll for transmitting a drive from said planetary gear transmission means to said roll, and rotary drive means operatively connected with said input of said planetary gear transmission means for driving said roll through said planetary gear transmission means and said connecting means, said planetary gear transmission means including an outer ring gear having inner and outer teeth, an inner sun gear, and a rotary spider means carrying a plurality of planetary gears which extend between and mesh with said inner sun gear and said inner teeth of said outer ring gear, said rotary spider means forming said output of planetary gear transmission mean while said sun gear forms said input thereof, and said support means including an outer stationary ring surrounding said outer ring gear and having inner teeth with which said outer teeth of said outer ring gear mesh, thus providing between said outer stationary ring and said outer ring gear and geared connection supporting said outer ring gear for substantially free movement in a plane containing said outer ring gear, planetary gears, and sun gear, said free movement of said outer ring gear being a non-rotary movement for the purpose of compensating for any inaccuracies which otherwise might be present in the mounting of said planetary gear transmission on said support means, said spider means having a pair of walls between which said planetary gears are located and including bodies extending between and fixed to said walls and situated circumferentially between said planetary gears.
In a machine which has a roll which is to be rotated about its axis, such as a machine of the type used in connection with the manufacture of paper, said roll having an end situated at a plane which is normal to said roll axis, and support means situated at said plane for supporting said roll at said end thereof for rotation about said axis, planetary gear transmission means situated adjacent to said plane and having an output and an input, connecting means connecting said output of said planetary gear transmission means to said end of said roll for transmitting a drive from said planetary gear transmission means to said roll, and rotary drive means operatively connected with said input of said planetary gear transmission means for driving said roll through said planetary gear transmission means and said connecting means, said planetary gear transmission means including an outer ring gear having inner and outer teeth, an inner sun gear, and a rotary spider means carrying a plurality of planetary gears which extend between and mesh with said inner sun gear and said inner teeth of said outer ring gear, said rotary spider means forming said output of said planetary gear transmission means while said sun gear forms said input thereof, and said support means including an outer stationary ring surrounding said outer ring gear and having inner teeth with which said outer teeth of said outer ring gear mesh, thus providing between said outer stationary ring and said outer ring gear a geared connection supporting said outer ring gear for substantially free movement in a plane containing said outer ring gear, planetary gears, and sun gear, said free movement of said outer ring gear being a non-rotary movement for the purpose of compensating for any inaccuracies which otherwise might be present in the mounting of said planetary gear transmission on said support means, said spider means having an inner portion surrounding and directly connected with said end of said roll and an outer portion in the form of a sleeve, and a shaft connected to said sun gear and extending coaxially through the latter sleeve.
In a machine which has a roll which is to be rotated about its axis, such as a machine of the type used in connection with the manufacture of paper, said roll having an end situated at a plane which is normal to said roll axis, and support means situated at said plane for supporting said roll at said end thereof for rotation about said axis, planetary gear transmission means situated adjacent to said plane and having an output and an input, connecting means connecting said output of said planetary gear transmission means to said end of said roll for transmitting a drive from said planetary gear transmission means to said roll, and rotary drive means operatively connected with said input of said planetary gear transmission means for driving said roll through said planetary gear transmission means and said connecting means, said planetary gear transmission means including an outer ring gear having inner and outer teeth, an inner sun gear, and a rotary spider means carrying a plurality of planetary gears which extend between and mesh with said inner sun gear and said inner teeth of said outer ring gear, said rotary spider means forming said output of said planetary gear transmission means while said sun gear forms said input thereof, and said support means including an outer stationary ring surrouding said outer ring gear and having inner teeth with which said outer teeth of said outer ring gear mesh, thus providing between said outer stationary ring and said outer ring gear a geared connection supporting said outer ring gear for substantially free movement in a plane containing said outer ring gear, planetary gears, and sun gear, said free movement of said outer ring gear being a non-rotary movement for the purpose of compensating for any inaccuracies which otherwise might be present in the mounting of said planetary gear transmission on said support means, said connecting means including a gear transmission driven by said planetary gear transmission means and extending between and operatively connected with said planetary gear transmission means and said end of said roll.
Dependencies are inferred from the claim text.