Abstract: A transmission includes a housing, a plurality of components, and a cooling system. The housing has a plurality of walls that cooperate to define an interior space and a sump configured to store lubricating fluid in use of the transmission. The plurality of components are arranged in the interior space and configured to cooperatively transmit rotational power between an input shaft and an output shaft of the transmission to reduce a rotational speed of the output shaft relative to a rotational speed of the input shaft in use of the transmission. At least one of the plurality of components is supplied with lubricating fluid stored by the sump in use of the transmission. The cooling system is supported by the housing.

Abstract: Transmissions and methods therefor are disclosed herein. A transmission includes a housing, an input shaft, and a cooling unit. The input shaft extends outside of the housing and is configured to receive rotational power from a rotational power source. The cooling unit is supported by the input shaft. The cooling unit includes a heat exchanger.

Abstract: A speed reducer system includes a speed reducer having a housing. The housing includes an outer surface. The speed reducer system also includes a plurality of cooling fins added to the outer surface via a metal additive manufacturing process.

Abstract: An adjacent safety configuration for an elevator includes a second pair of safeties displaced from a first pair of safeties by at least 0.1 seconds of travel time at a rated speed of the elevator. An adjacent safety configuration for an elevator including a second pair of safeties displaced from the first pair of safeties to provide a predetermined time period before the second pair of safeties pass over a point on a guide rail previously passed over by the first pair of safeties to permit the guide rail surface to decrease by a predetermined temperature. A method of spacing an adjacent safety configuration for an elevator system including de-rating a pair of trailing safeties with respect to a pair of leading safeties as a function of a rated speed of the elevator and a spacing between the pair of trailing safeties and the pair of leading safeties.

Abstract: A speed reducer system includes a speed reducer having a housing. The housing includes an outer surface. The speed reducer system also includes a plurality of cooling fins added to the outer surface via a metal additive manufacturing process.

Abstract: A mechanical drive system includes a mechanical drive component, an enclosure, and a centrifugal fan. The mechanical drive component has a housing and a rotatable shaft supported within the housing. The enclosure is disposed on the housing and a wall of the housing has an output opening therein through which the rotatable shaft of the mechanical drive component extends and another wall has an intake opening therein. Surfaces of the housing and the walls of the enclosure define an air passage channel extending from the intake opening to the output opening. The centrifugal fan is aligned and in fluid communication with the output opening of the enclosure. The impeller is operatively connected to the rotatable shaft.

Abstract: A system includes a machine; a centrifugal fan, the centrifugal fan having a plurality of centrifugal fan blades and being constructed to generate a cooling airflow for cooling the machine; and an axial flow inducer disposed on the plurality of centrifugal fan blades, wherein the axial flow inducer is constructed generate an axial flow through a central portion of the centrifugal fan.

Abstract: Transmissions and methods therefor are disclosed herein. A transmission includes a housing, an input shaft, and a cooling unit. The input shaft extends outside of the housing and is configured to receive rotational power from a rotational power source. The cooling unit is supported by the input shaft. The cooling unit includes a heat exchanger.

Abstract: A transmission includes a housing, a plurality of components, and a cooling system. The housing has a plurality of walls that cooperate to define an interior space and a sump configured to store lubricating fluid in use of the transmission. The plurality of components are arranged in the interior space and configured to cooperatively transmit rotational power between an input shaft and an output shaft of the transmission to reduce a rotational speed of the output shaft relative to a rotational speed of the input shaft in use of the transmission. At least one of the plurality of components is supplied with lubricating fluid stored by the sump in use of the transmission. The cooling system is supported by the housing.

Abstract: A system includes a gearbox having an external surface; a fan or impeller constructed to generate a first cooling airflow when rotated; a shroud operative to guide and discharge the first cooling airflow over the external surface and cool the gearbox, wherein at least a portion of the shroud is spaced apart from the gearbox and disposed radially outward of the external surface; and a flow entrainment structure coupled to the gearbox and/or the shroud, wherein the flow entrainment structure is constructed to entrain a second cooling airflow and combine the second cooling airflow with the first cooling airflow to form a combined cooling airflow directed across the external surface to cool the gearbox.

Abstract: A system includes a machine having an external surface and a shaft extending from a first side of the machine; a cooling airflow generator mounted on the shaft and operative to generate a cooling airflow for cooling the machine; a flow guide structure constructed to receive the cooling airflow from the cooling airflow generator and to direct the cooling airflow received from the cooling airflow generator across the external surface; and a scavenge scoop spaced apart from the flow guide structure and disposed at a second side of the machine opposite the first side, wherein the external surface is disposed between the scavenge scoop and the flow guide structure, and wherein the scavenge scoop is constructed to collect a portion of the cooling airflow generated by the cooling airflow generator and direct the a portion of the cooling airflow across a portion of the second side of the machine.

Abstract: A mechanical drive system includes a mechanical drive component, an enclosure, and a centrifugal fan. The mechanical drive component has a housing and a rotatable shaft supported within the housing. The enclosure is disposed on the housing and a wall of the housing has an output opening therein through which the rotatable shaft of the mechanical drive component extends and another of wall has an intake opening therein. Surfaces of the housing and the walls of the enclosure define an air passage channel extending from the intake opening to the output opening. The centrifugal fan is aligned and in fluid communication with the output opening of the enclosure. The impeller is operatively connected to the rotatable shaft.

Abstract: A system includes a machine having an external surface and a shaft extending from a first side of the machine; a cooling airflow generator mounted on the shaft and operative to generate a cooling airflow for cooling the machine; a flow guide structure constructed to receive the cooling airflow from the cooling airflow generator and to direct the cooling airflow received from the cooling airflow generator across the external surface; and a scavenge scoop spaced apart from the flow guide structure and disposed at a second side of the machine opposite the first side, wherein the external surface is disposed between the scavenge scoop and the flow guide structure, and wherein the scavenge scoop is constructed to collect a portion of the cooling airflow generated by the cooling airflow generator and direct the a portion of the cooling airflow across a portion of the second side of the machine.

Abstract: A system includes a machine; a centrifugal fan, the centrifugal fan having a plurality of centrifugal fan blades and being constructed to generate a cooling airflow for cooling the machine; and an axial flow inducer disposed on the plurality of centrifugal fan blades, wherein the axial flow inducer is constructed generate an axial flow through a central portion of the centrifugal fan.

Abstract: A system includes a gearbox having an external surface; a fan or impeller constructed to generate a first cooling airflow when rotated; a shroud operative to guide and discharge the first cooling airflow over the external surface and cool the gearbox, wherein at least a portion of the shroud is spaced apart from the gearbox and disposed radially outward of the external surface; and a flow entrainment structure coupled to the gearbox and/or the shroud, wherein the flow entrainment structure is constructed to entrain a second cooling airflow and combine the second cooling airflow with the first cooling airflow to form a combined cooling airflow directed across the external surface to cool the gearbox.

Abstract: A gearbox system includes a gearbox having a housing. The housing includes a surface. The gearbox system also includes an add-on cooling fin panel in thermal engagement with the surface. The cooling fin panel includes a plurality of cooling fins. The gearbox system further includes an attachment feature constructed to affix the cooling fin panel to the gearbox. The cooling fin panel is constructed to transfer heat from the surface to the cooling fin panel by conduction; and the cooling fin panel is configured to transfer heat to an environment in which the gearbox is located by convection.

Abstract: A device and methods are provided for deep rolling. In one embodiment, a deep rolling tool for applying compressive stress with rolling elements includes a fork having a base section and a plurality of fork arms, each fork arm extends outwardly from the base section and the fork arms are separated from one another to form an opening. The deep rolling tool may also include rolling elements, wherein each rolling element is mounted at the distal end of a fork arm, and the rolling elements are configured to apply a compressive stress to articles received by the deep rolling tool.

Abstract: A method of manufacturing an elevator safety spring is provided. The method includes determining a plurality of dimensional parameters of the elevator safety spring. The method also includes selecting a plurality of dimensions within the dimensional parameters. The method further includes manufacturing the elevator safety spring based on the selected parameters, the elevator safety spring having an I-beam cross-section.

Abstract: A device and methods are provided for deep rolling. In one embodiment, a deep rolling tool for applying compressive stress with rolling elements includes a fork having a base section and a plurality of fork arms, each fork arm extends outwardly from the base section and the fork arms are separated from one another to form an opening. The deep rolling tool may also include rolling elements, wherein each rolling element is mounted at the distal end of a fork arm, and the rolling elements are configured to apply a compressive stress to articles received by the deep rolling tool.

Abstract: An adjacent safety configuration for an elevator includes a second pair of safeties displaced from a first pair of safeties by at least 0.1 seconds of travel time at a rated speed of the elevator. An adjacent safety configuration for an elevator including a second pair of safeties displaced from the first pair of safeties to provide a predetermined time period before the second pair of safeties pass over a point on a guide rail previously passed over by the first pair of safeties to permit the guide rail surface to decrease by a predetermined temperature. A method of spacing an adjacent safety configuration for an elevator system including de-rating a pair of trailing safeties with respect to a pair of leading safeties as a function of a rated speed of the elevator and a spacing between the pair of trailing safeties and the pair of leading safeties.