Experiences in the NdT control of elevator ropes

Eng. Bruno Vusini Eng. Daniel Rossi

AMC Instruments srl is an italian company, specialized in the field of NdT devices andservices, with more than 10 years of experience in this sector

Patented innovative solutions for the magneto inductive test of ropes used in Ropeways, Cranes, Elevators

CHALLENGE

Since 2008 AMC Instruments has performed an intensive work connected to the developmentof NdT devices dedicated to the field of elevators, by transporting its experience coming from other sectors such as the ropeways and industrial ones.

CHALLENGE

Requires coming from the field

More than 1 rope to test

Reduced distancebetween the ropes

Wide range of ropediameters

Reduced spaces and difficulty to access to

the ropes

Wide range of differentplants

Multi channelmeasuring head and acquisition system

Selectivity of the system

Flexibility in terms of diameter range

Very portable device

Easy to install

Kind of elevators Electric(traditional)

HydraulicMRL

Electric

Hydraulic

MRL

More than 1 rope

Low distances betweenropes

Wide range of diameters

Reduced space to perform the test

The detector must be very little in order to work in veryreduced spaces

Plant data:

Speed: 8 m/sN. of ropes: 6Ropes age: 4 yearsRopes diameter: 16 mmDistance between ropes: 40 mm

Example 1

Internal breaks

Example 1: Graph

Example 2

Plant data:

Speed: 0,7 m/sN. of ropes: 4Ropes age:18 yearsRopes diameter: 11 mmDistance between ropes: 20 mm

Example 2: Graph

Example 3: Comparison of tests performed during the year

Rope 1TEST 1 – 13/05/2016 TEST 2 – 22/09/2016

Rope 2TEST 1 – 13/05/2016 TEST 2 – 22/09/2016

Example 3: Comparison of tests performed during the year

Rope 3TEST 1 – 13/05/2016 TEST 2 – 22/09/2016

Example 3: Comparison of tests performed during the year

Example 4: MRL test

Example of installation

Fixing by textile ropes

COATED ROPES AND BELTS

In last years, new suspenction elements have been developed and used. In recent elevators itis possible to find polymeric coated ropes and belts, in which the classic visual control cannotbe performed

SOLUTION: MRT

BELTS

Up to 12 little metallic ropes inside a polymeric structure

AMC Instruments has developed a newsystem validated through hundreds of testsperformed around the world

COATED ROPES

Little diameter ropes (less than 7mm diameter) coated with polymeric material

Also in this case the visual control cannotbe performed. AMC has developed adevice that allows to test the ropes withthe MI method without to damage thecoating

PAST PRESENT and FUTURE