Inclined Hoisting Machine Mounting for Elevator Modernization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The installation of modern gearless hoisting machines in old elevator machine rooms is hindered by limited space, especially in small rooms with low headroom, as they are larger than geared machines and have components that extend in various directions, making positioning and servicing difficult, and existing rope apertures on the machine bedplate are not compatible, requiring costly modifications.
Innovation Solution
A fixing arrangement where the hoisting machine and its base structure are mounted at an inclined angle, utilizing adjustable diverting pulleys to route ropes close to the wall without reducing the angle of wrap, allowing the use of existing rope apertures and minimizing space requirements, enabling easy installation and servicing with minimal modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a modern gearless hoisting machine with large diameter traction sheave is installed in an old machine room, then the elevator can be modernized with improved performance, but the machine room space is insufficient and headroom is too low
Solution Approach 1:
The hoisting machine is rotated from a conventional horizontal orientation to an inclined orientation at approximately 45 degrees. This dimensional change allows the machine to fit within the limited headroom of old machine rooms while maintaining the necessary operational space for the traction sheave and associated components.
Solution Approach 2:
The base structure incorporates adjustable support plates with multiple fixing positions that allow the hoisting machine to be positioned at different angles and locations. This dynamic positioning capability enables adaptation to various machine room configurations and ensures proper spacing from walls and other components.
2Productivity
If the hoisting machine is positioned to utilize available space, then installation is enabled in old machine rooms, but servicing and maintenance become awkward due to limited access
Solution Approach 1:
The adjustable base structure with multiple fixing positions allows the hoisting machine to be repositioned during maintenance operations. Technicians can adjust the machine's location to gain better access to components for servicing while maintaining the optimized position during normal operation.
Solution Approach 2:
The base structure is divided into separate adjustable components including support plates and fixing elements that can be independently positioned. This segmentation allows selective adjustment of the machine's position to facilitate maintenance access without permanently altering the installation configuration.
3Ease of manufacture
If existing rope apertures on the machine bedplate are used, then installation costs and time are reduced, but the rope apertures are not compatible with the new traction sheave dimensions
Solution Approach 1:
A diverting pulley system is introduced as an intermediary component between the existing rope apertures and the new traction sheave. This mediator allows the ropes to be properly routed from the existing apertures to the new sheave position, maintaining compatibility with both the old bedplate and new machine components.
Solution Approach 2:
The inclined positioning of the hoisting machine changes the spatial relationship between the rope apertures and the traction sheave. This dimensional change allows the existing apertures to be properly utilized with the new sheave by adjusting the rope routing path through the diverting pulley system.
4Volume of moving object
If diverting pulleys are used to route ropes close to the wall, then space is saved and rope routing is improved, but the angle of wrap on the traction sheave is reduced which decreases friction
Solution Approach 1:
The adjustable diverting pulleys can be positioned at different locations along the rope path. This dynamic positioning allows optimization of both space utilization and the angle of wrap on the traction sheave, enabling the system to achieve sufficient friction while maintaining compact dimensions.
Solution Approach 2:
The position and angle of the diverting pulleys can be adjusted to change the rope routing parameters. By optimizing these parameters, the system achieves the necessary angle of wrap on the traction sheave to maintain adequate friction while still routing ropes close to the wall to save space.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The object of the arrangement is a fixing arrangement of a hoisting machine of an elevator and a method for installing a hoisting machine of an elevator. The fixing arrangement comprises at least a hoisting machine (3) provided with a traction sheave (3b), which hoisting machine is fixed to a base structure (2), which is further fixed to a machine bedplate (1). The hoisting machine (3) is fixed to the base structure (2) in an inclined attitude with respect to the horizontal plane.