A regular program of wire rope lubrication is essential to the life and health of your installation. Suspension ropes, bigger in diameter than 16 mm 58 with 6 to 9 outer strands should have at least filler wire strands because of better flexibility. Wire rope and wire rope slings elevator products chain products synthetic slings fittings and blocks hoists and winches below the hook products fall restraint cordage cargo control tools and other items useful information download and print alp industries catalog. A wire rope inspector is a person who performs inspections required for each tramway equipped with wire rope in the state of maine. Although their operating properties vary, all have the same weight per foot and the same minimum breaking force, size for size. Sheave hardness varies between elevator companies and sheave design, as well as with age of the equipment. Before bringing the rope into operation on the appliance, the user shall ensure that all the devices associated with the wire rope operation are set and functioning correctly.
Grooves should have an arc of contact with the wire rope between 5 and 150 degrees. Generic wire rope lubrication like that used for crane wire rope is unsuitable for elevator use. As the elevator wire ropes will be regularly lifting heavy loads, with both the weight of the elevator and the multiple passengers that it must carry, it is important that it is strong and reliable. This tech tip addresses many of the more frequently asked questions about rope and lubrication. Wire to most wire rope users, 6 x 19 means 6 x 25 filler wire. Acculube 300 automatic rope lubricator, with three brushes 300 mm 11. Any contact between the steel prongs of the fork lift. The ropes 152 wire and strand components continually adjust and readjust as the. European and international elevator rope standards en 12385 part 5 2 also 4344 3 have coined the term rope grade to describe rope strength. The 6 x 36 classification of wire ropes includes standard 6 strand, round strand ropes with 27 through 49 wires per strand. A simple hemp rope lies at the center of one of the bestknown elevator stories elisha graves otis demonstration of his improved safety device at the 1854 crystal palace in new york city. A wire rope is designated by the over all diameter, the number of strands, number of wires per strand, the cores, the type of lay and the length etc. In the example above, each individual wire is arranged around a central wire to form a 7 wire strand. Elevator cable tension meter quick balance dillon qb.
In standard practice, the nominal diameter, or 12 in our example, is the minimum diameter to. A brief history of elevator wire ropes, part three elevator. Standard for elevator suspension, compensation and governor systems asme a17. Notwithstanding, all in all, wire rope alludes to distances across bigger than 38 inch sizes littler than this are assigned as link or ropes. Draka elevator offers an everexpanding product range as well as supplier integration capabilities for the elevator industry. Detection of broken wires in elevator wire ropes with. Locate a service center near you the bethlehem wire rope service group is the team against which all others benchmark customer service.
This article reports the condition monitoring of a steel wire rope from a hoisting elevator with broken wires as a result of corrosive environment and fatigue. Due to tic coating, the traction sheaves can hus enhancing service life. Choosing wire ropes the subject of wire ropes is a large one and covers hundreds of industies requiring a lifetime of study. It is one of the largest wire rope manufacturer in the world.
To select the best wire rope for each application, one. Wire rope installation 7 wedge socket installation 8. Guidelines for handling, installation and maintenance of wire ropes. Bekaert elevator rope wire meets the standard en102642 specifications. There has always been a need for a field lubrication that deals with the bending stresses, high groove pressures and moisture that attack elevator ropes. Wire rope products will break if abused, misused or overused. Tck elevator wire rope tester has achieved the perfect combination of innovative technology, practicability and miniaturization. Oakland elevator colorado denver connecticut north haven florida jacksonville orlando georgia atlanta elevator illinois saint charles maryland baltimore elevator massachusetts boston oklahoma moore pennsylvania harrisburg tennessee nashville elevator texas corpus christi dallas houston odessa alps wire rope corporation. As the rope size increases, for instance, a large number of wires can be used to achieve required fatigue resistance, and still those wires will be large enough to offer adequate resistance to abrasion.
Elevator ropes and accessories for north america prysmian. Wire rope is actually a machine with a multitude of moving parts. Wire rope cores natural fiber is the most common core used in elevator ropes in north america. For a 26mm wire rope to escape bend fatigue the winch drum or block sheaves over which it runs would need a minimum diameter of over 1. Initially wrought iron wires were used, but today steel is the main material used for wire ropes. Draka elevator gets quite a number of questions about wire rope lubrication. It is a common rope in the 6 x 19 clasvlafdwlrq 6 x 26ws warrington seale a standard 6 x 26ws design provides the best rope for a wide range of applications. Selfcontained system green technology smoothest ride. Some information for this manual was taken with permission from the installation manual. Normally, an elevator wire rope is composed of six, eight or nine strands with fc or iwrc as. It is possible to calculate, based on feyrers formula, for a set of given parameters rope design, nominal rope diame. Wire strand core wsc strand usually of the same construction as the outer strands. A number of operations of the crane shall be carried out at ap proximately 10 % of the normal load to stabilize the wire rope.
Single ropes are widely used as main hoist ropes for tower cranes, truck cranes, deck cranes, and floating cranes. Lefthanded and galvanized ropes will be manufactured upon special request. Frequently asked questions about wire ropes in elevators. Mependent wire rope iwrc this is a separate wire rope. On this page you can log in and then you have access to all the material certificates on steel wire ropes you have purchased from ropenhagen. This is especially true of elevator ropes because of their relatively long service lives.
Steel wire ropes for traction elevators elevator world online. The mechanical properties of the ropes in use depend on the rope construction, the load situation, nonlinearities and the lift dimensions. Water weights with over 25 years experience in the crane industry possess extensive knowledge of customer requirements. Draka elevator is the cable manufacturer and component distribution source to the vertical transportation industry. Draka elevator usa, united states, north carolina, rocky. This is a short introduction to small diameter wire ropes typically used for flying scenery, display, handrailing and small yacht rigging. Standard 6 x 19 and 6 x 36 classification ropes 6 x 19 vs. A brief history of elevator wire ropes, part one elevator. North american technical support elevator ropes and. In general, we recommend the use of a 6 x 26ws in any application where a 6 x 25f is used. Acculube automatic rope lubricator and cleaning kit. Drako will of course continue to supply its customers with such solutions.
Our elevator ropes come with a bright selfcolored finish and a lubricant designed to enhance the traction process. Elevator ropes are discarded on account of wire breaks, wear andor diameter reduction. Our global team of experts can also help customize the properties to your specific requirements. What would be the elevator speed when the manual lowering valve is opened.
Some of the rope services direct ltds sturdy rope a safe alternative. When an elevator hoist rope is in operation, each wire is in contact over its entire length with other wires, sheaves and drums. The quality of the steel wires used for elevator cores has a substantial impact on the service life of the rope. Basic field practices for installation of elevators and escalators by. Initially, the systems were costly, but ropes and sheaves lasted forever. Pdf influences on lifetime of wire ropes in traction lifts. Compact gearless machine flexible belts allow a smaller sheave. Operating machinery positioned above positioned above elevator elevator hoistway. Wire rope tools tension measuring 19 20 diameter measuring 20 cutting 20 about gustav wolf since 1887, gustav wolf has been a wellknown name in wire ropes. Together with the other two articles in this series elevator world, may and june 2016, this brief history of elevator wire ropes serves, in many ways, as an outline of a more complex story. During evaluation, corrosion, rope deformation or excessive elongation should also be taken account. Construction the main components of wire rope are shown below.
Today, the downsizing trend in new construction and modernization is effectively holding down costs on the front end, but this push towards smaller systems is adversely affecting wire rope. These technical documents or parts of them may not be duplicated, distributed, made available. Module 10 final exam elevator preventive maintenance. Our extensive product inventory of over 7,000 components includes compensation, traveling and hoistway cables, wireway, wire rope and accessories, tools, maintenance and.
To assess whether a rope is to be replaced, please refer to chapter rope. Independent wire rope core effectively increases the metallic crosssection of elevator wire ropes and reduce tensile stress in individual wires. They should be tapered to permit the rope to enter and leave the groove smoothly. End termination the treatment at the end or ends of a length of wire rope, usually made by forming an eye or. Wire rope engineers design those parts in different steel grades, finishes and a variety of constructions to attain the best balance of strength, abrasion resistance, crush resistance, bending fatigue resistance and corrosion resistance for each application. Wire strand core wsc these cores are chiefly for standing ropes guys or rigging. Service life prediction of running steel wire ropes. This engineering breakthrough paved the way for other innovations. The core serves as the foundation to hold the rope together.
It is also the only wire rope company in the world that has a totally integrated business model to convert ironore into steel wire ropes as well as build its own wire drawing and rope making machinery. Rene karavas, regional supervisor tssa elevating and amusement devices. Steel wire ropes in elevators 092019 token fee 9,50 eur. Beam clamps are used to suspend manual and electric hoists, as anchor points, or as lifting. Elevator wire rope is specified by its diameter, construction, finish, grade, lay. It consists of a high tensile steel wire elevator rope covered with a thermoplastic coating. Acculube automatic rope lubricatorscleaners part number description acculube 200 automatic rope lubricator, with three brushes 210 mm 8. Due to excellent rotation resistant and ease of handling, single ropes are also popular as lead lines when laying a long length of power cables.
If there is anything in this manual that is not clear or which you. Elevator hoist rope with steel core iwrc steel core elevator hoist ropes are used where additional strength is required without increasing the diameter of the wire rope. It consists of a high tensile steel wire elevator rope covered with a. Eye or eye splice a loop, with or without a thimble, formed at the end of a wire rope. Of course the production of ropes with diameters not listed in the tables above is possible. The four main criteria that determine the choice of the correct wire rope are. Wire rope core wrc a wire rope usually of 6 x 7 611 x 7 6a construction. The design utilizes wire ropes in conjunction with two hydraulic jacks to lift the elevator at a 1. Today, with six factories in five countries, we offer a full line of elevator wire ropes designed and manufactured to meet the requirements of the elevator industry worldwide. Wire rope installation guide prysmian group north america.
For example, an 8x19 seale has 152 moving parts 8 strands, 19 wires per strand that must be work in conjunction with not only each other, but also with external forces, such as sheaves. A brief history of elevator wire ropes, part one the humble hoisting rope occupies a unique place in the history of vertical transportation. It defines the nominal tensile strengths of the outer and inner wires, and assigns the rope a defined minimum breaking strength. Galvanized wire ropes are available for special applications requiring additional levels of corrosion protection that cannot be fully accomplished through the lubrication of the wire rope. The term link is frequently utilized reciprocally with wire rope. With over 35 years of experience in the industry, we have built a global reputation for providing highquality, innovative components essential to effective elevator operation. Finite element analysis was conducted as a baseline to study guided wave propagation in wire ropes and plot dispersion curves. Ced can provide you with the highest quality elevator wire rope in the industry. Fiber synthetic or sisal, which is the weakest, strand the core is a wire strand, just like the other strands of the rope. Wire ropes are composite construction of strands of fibre or steel or both, bunched to form a core surrounded by stranded and twisted cores.
The use of elevator wire ropes rope services direct. Kinking and dragging ropes over sharp edges must be avoided. This is clearly impractical in many applications, and unnecessary if. Meanwhile, steel cores low the elongation of elevator wire ropes under same loads compared with fiber core. How often should you inspect the brushes and the commutator of a. Consult industry recommendations and asme standards before using. Analysis of bending fatigue in a 2inch iwrc wire rope author. The increased specificity of the code was doubtless informed by the gradual accumulation of data on wire rope use during the 1930s and 1940s.
However, in some highrise highspeed, most mrl and certain hydraulic applications, the use of steelreinforced natural fiber or full steel core iwrc ropes is becoming more common. Wire rope replacement criteria tech tip 2 t e c h t ip draka elevator 02 0112 2151 n. Eecos engineering, management and research staff consists of highly trained individuals who have many years of experience in the design and manufacture of hydraulic elevator equipment. All certificates are located here as pdf files ready for downloading. An additional benefit of the steel core is that these ropes will exhibit somewhat reduced stretch when compared with that of fiber core ropes. Range of high carbon wires for elevator rope applications according to en102642 or according to customer specs.
We stock large quantities of different varieties to be available for whatever type job you may have. The quality of the lubricant in a wire rope is just as important as the quality of other rope components wire and core. It has a single wire center with six wires of the same diameter around it. A used groove can be too small for a new rope, thus accelerating rope wear. For each foot the jack rises, the elevator rises two feet. With a pc, testing data is displayed in real time and the testing result is not affected by the speed and load of the target elevator. A compromise between rope life and machining frequency must be made.
Coated steel belts have a significantly smaller bending radius than wire rope. Jun 04, 2018 wire rope is a sort of link which comprises a few strands of metal wire laid or curved into a helix. Storage wire rope should be stored indoors, off the ground and covered to protect it from moisture, dirt, dust, sunlight, etc. Wire rope diameter 12 8x19s brt trc rr fs fc it is important to recognize that wire rope is always manufactured larger, never smaller, than the nominal diameter. The gen2 elevator delivers superior performance in a space saving design.
442 1206 79 958 478 524 896 906 141 510 191 1593 594 290 1425 167 503 551 1271 1082 642 94 625 1099 1421 233 1367 547 892 1201 159 733 1030 781 267 1401 758 1175 678