Blair Multi-Rope hoist

Share this page

Designed to allow for the greatest depths and higher payloads

What is a Blair Multi-Rope hoist (BMR)?

Blair multi-rope (BMR) hoists can be used as production or service hoists. Blair multi-rope hoists are also known as multi-rope drum hoists. Both single drum and double drum hoists are employed.. A multi-rope drum hoist is similar to a drum hoist – but each drum has two ropes to allow for the loads. BMR hoists require a rope tension balancing system to ensure that each of the two ropes carries equal tension at the conveyance.
 
BMRs are ideally suited for depths above 2 000 m and payloads above 20 000 kg. There is an option to have this hoist either as a mechanically coupled double drum configuration or two single drums which are electrically coupled.
 

Contact

Want to know more about ABB's BMR offering? 

Key features

Key Features:

  • Dual-drum design to achieve counterbalance effect
  • Hydraulically controlled compensating head sheaves to equalize rope tension
  • Versatile setups with mechanical or electrical synchronization
  • In-line double drum or angled double drum making use of the Hooke's joint

Blair Multi-Rope hoist solutions

Mechanically coupled BMR

As payload and hoisting distance increase, the rope of drum hoists increases to meet the required safety factor.

In the mechanically coupled BMR solution, each conveyance is carried by two ropes. The ropes are attached to a common compensating wheel mounted on the conveyance. Thereby equal load sharing is ensured between the ropes, compensating for unequal coiling or elongation.

However, the compensating wheel mass reduces the allowed payload. As an alternative to the conveyance mounted compensating wheel, a hydraulic compensating device has been developed which can adjust the vertical position of the head sheaves of each conveyance. The two sheaves of each conveyance are suspended by hydraulic cylinders which are controlled, monitored and interfaced to a hoist control system. This solution provides the same functionally as the compensating wheel, ensuring balanced tension in the two ropes connected to each conveyance. 


 

Electrically coupled BMR

In this BMR solution, you have an “electric shaft” between the two drums. This means that each drum has its own motor and that the two motors are synchronized and moves as if there was a solid joint between them.

In this way, the network reaction is comparable with a normal BMR in terms of active power since the unwinding drum is regenerating power of the network, compensating the power consumption of the winding drum.



 

Our offering

As a partner in complete mine hoist systems, ABB is perfectly equipped to supply the complete BMR scope from planning and design to commissioning and maintenance. Our offering includes all electrical and mechanical component as well as shaft equipment. 

A solution tailored to your needs

ABB’s in-house mechanical hoist design capability makes it possible to optimize hoist design between electrical and mechanical components in a most effective way. This mechanical capability makes ABB capable of designing every mechanical component for all types of mine hoists.

Learn more

Web portal
ABB in hoisting

Visit the portal
ABB has been a leader in developing world-class hoisting solutions for over 130 years. Powered by electricity with the possibility to run off renewable energy sources, hoists are very much a future forward solution for enabling the sustainable transformation.

To date, ABB has delivered over 1 000 hoisting solutions globally. As the sole supplier of complete mechanical and electrical mine hoist systems, customers can benefit from low life cycle cost, high reliability and system availability, short project execution time, and a single source of supply for complete systems, including service and spare parts.
  • Contact us

    Submit your inquiry and we will contact you

    Contact us
Select region / language