An elevator installation and method to passively and reliably generate electrical energy while the elevator installation is in operation utilizes piezoelectric layers. The elevator installation includes an elevator car, a tension member for supporting and moving the elevator car, and a pulley engaging with the tension member wherein the pulley has a piezoelectric layer positioned such that any force imparted to the pulley during engagement with the tension member compresses the piezoelectric layer. As the tension member is driven to move the elevator car up and down along an elevator hoistway it also engages with the rotating pulley. Force imparted to the pulley during this engagement with the tension member compresses the piezoelectric layer which consequently generates electrical energy.

An elevator installation and method to passively and reliably generate electrical energy while the elevator installation is in operation utilizes piezoelectric layers. The elevator installation includes an elevator car, a tension member for supporting and moving the elevator car, and a pulley engaging with the tension member wherein the pulley has a piezoelectric layer positioned such that any force imparted to the pulley during engagement with the tension member compresses the piezoelectric layer. As the tension member is driven to move the elevator car up and down along an elevator hoistway it also engages with the rotating pulley. Force imparted to the pulley during this engagement with the tension member compresses the piezoelectric layer which consequently generates electrical energy.

Diverting pulley arrangement, more particularly a diverting pulley arrangement of an elevator, which arrangement includes an axle, at least one diverting pulley that rotates while supported on the axle, a faceplate structure, in relation to which and supported by which the diverting pulley is arranged to rotate on the first side of the faceplate structure, which axle is locked so that it does not rotate by the aid of a locking element that moves in relation to the faceplate structure, which locking element is on the second side of the faceplate structure. When it starts to rotate, the end of the axle forces the locking element to displace out of its position and to trip a safety switch.

Diverting pulley arrangement, more particularly a diverting pulley arrangement of an elevator, which arrangement includes an axle, at least one diverting pulley that rotates while supported on the axle, a faceplate structure, in relation to which and supported by which the diverting pulley is arranged to rotate on the first side of the faceplate structure, which axle is locked so that it does not rotate by the aid of a locking element that moves in relation to the faceplate structure, which locking element is on the second side of the faceplate structure. When it starts to rotate, the end of the axle forces the locking element to displace out of its position and to trip a safety switch.

A modular elevator sheave comprises a mandrel body, wherein multiple sheave units are arranged side by side along the mandrel body, and wherein, the outer wall of the outer circumference of the sheave unit is provided with a groove. In this structural composition, the mandrel body with multiple sheave units, which increases the overall strength and rigidity of the sheave. Furthermore, the number of sheave unit used can be increase and decrease depending on the need or situation, and it should be noted that since the sheave unit can be replaced individually when damaged, it is easier to maintain and reduce repairing costs.

An illustrative example embodiment of an elevator sheave liner includes a liner body having an inner surface configured to be received against a sheave and an outer surface configured to engage an elevator tension member. The liner body comprises a polymer material and a plurality of wear resistance particles in the composite material. The wear resistance particles are nanoparticles or microparticles. At least some of the wear resistance particles establish a traction characteristic of the outer surface of the sheave liner.

An illustrative example embodiment of an elevator sheave liner includes a liner body having an inner surface configured to be received against a sheave and an outer surface configured to engage an elevator tension member. The liner body comprises a polymer material and a plurality of wear resistance particles in the composite material. The wear resistance particles are nanoparticles or microparticles. At least some of the wear resistance particles establish a traction characteristic of the outer surface of the sheave liner.

The invention relates to an a drive machinery for an elevator, the drive machinery comprising a rotatable drive sheave for driving plurality of ropes of the elevator, the drive sheave comprising a central cylinder, which comprises a central axis around which the central cylinder is rotatable; plurality of circular rim members surrounding the central cylinder, each said rim member comprising an outer rim surface for engaging a rope. Said plurality of circular rim members includes one or more rotatably mounted circular rim members, each said rotatably mounted circular rim member being mounted on the central cylinder rotatably around said central axis relative to the central cylinder and relative to one or more of the other circular rim members, and in that said drive sheave moreover comprises a control means for controlling rotation of each said rotatably mounted circular rim member relative to the central cylinder and relative to one or more of the other circular rim members. The invention also relates to an elevator implementing the drive machinery.

The invention relates to an a drive machinery for an elevator, the drive machinery comprising a rotatable drive sheave for driving plurality of ropes of the elevator, the drive sheave comprising a central cylinder, which comprises a central axis around which the central cylinder is rotatable; plurality of circular rim members surrounding the central cylinder, each said rim member comprising an outer rim surface for engaging a rope. Said plurality of circular rim members includes one or more rotatably mounted circular rim members, each said rotatably mounted circular rim member being mounted on the central cylinder rotatably around said central axis relative to the central cylinder and relative to one or more of the other circular rim members, and in that said drive sheave moreover comprises a control means for controlling rotation of each said rotatably mounted circular rim member relative to the central cylinder and relative to one or more of the other circular rim members. The invention also relates to an elevator implementing the drive machinery.

Disclosed is a modular sheave unit including: a bearing that includes an outer race, an inner race and one or more rolling elements therebetween; and a sleeve that includes one or both of: an outer sleeve axially surrounding the outer race, the outer sleeve including an outer surface defining a groove, the groove configured to receive a belt; and an inner sleeve axially surrounded by the inner race and disposed between the inner race and a mandrel.