Steel ropes
- it is the main part of load-lifting, transport, digging vehicles and mechanisms, cars for a construction of roads. It is a responsible type of products from a wire which have a large number of types, designs.
Steel ropes differ in a form of cross section and mechanical characteristics of a wire, cores.
Steel ropes one of the most widespread hardware are also applied in all industries: oil and gas extraction, mining, in agriculture, in mechanical engineering, sea, river, land transport.
Design of steel ropes.
The steel ropes produced from a large number separate a provolok have the increased durability and small flexural rigidity that causes their broad application in cranes.
According to GOST 3241-80 on a design distinguish steel ropes: an unary twist from a provolok, twisted on a spiral in one or several concentric layers; a double twist, consisting of the locks twisted in one or several concentric layers; a threefold twist from the twisted ropes of a double twist (strands). Steel ropes of a double twist with an opposite direction of a twist of locks on layers have smaller aspiration to torsion, than ropes with one layer of locks.
As a twist of locks and ropes of an unary twist distinguish ropes: Shopping mall - with a dot contact a provolok between layers; LX - with a linear contact a provolok between layers; LK-O - with a linear contact a provolok between layers with an identical diameter a provolok on lock layers; LK-R - with a linear contact a provolok between layers with different diameters a provolok in an external layer of a lock; LK-Z - with a linear contact a provolok between layers and provolokam of filling; LK-RO - with a linear contact a provolok between layers and the layers having in a lock from provoloka of different diameters and layers from provoloka of identical diameter; TLK - with the combined dot and linear contact a provolok.
The steel ropes working at blocks and reels with a semicircular flute should be chosen with LX locks as their durability is 1,5 - 2 times more, than ropes with locks of shopping mall.
On material of the core distinguish steel ropes: the lake of page - with the organic core from natural or synthetic materials protecting thanks to impregnation by greasing internal parts of a rope from corrosion and promoting attrition reduction a provolok; page m - with the metal core.
In steel ropes of a double twist usually use integrally cores. Hot shops use metal cores. Metal cores apply also at a multilayered navivka on a drum.
On a way of a twist distinguish steel ropes: N - not untwisted (locks in ropes of a double and threefold twist, external locks of mnogopryadny ropes, a wire in ropes of an unary twist keep the situation after removal of bandagings and tea leaves from the end of a rope, at the same time metal cores can be manufactured untwisted); Р - untwisted (a lock and a wire do not keep the situation in a rope after removal of bandagings and tea leaves from the end of a rope).
Not untwisted steel ropes thanks to a preliminary bend a provolok have smaller aspiration to torsion and formation of knots and loops and have bigger durability.
In the direction of a twist distinguish ropes right (P) and the left (L) twist.
The direction of a twist of a steel rope is defined: for ropes of an unary twist - the direction of a twist a provolok external tsloya; for ropes of a double twist - the direction of a twist of locks of an external layer; for ropes of a threefold twist - the direction of a twist of strands in ropes. The direction of a twist matters only at smooth drums.
At a suspension bracket of a hook or the grab on two and more branches it is necessary to apply ropes of a different twist to reduction of torsion.
On a combination of the directions of a twist of a steel rope and its elements in ropes of a double and threefold twist distinguish steel ropes: krestovy twist (direction of a twist of a rope and direction of a twist of strands and locks opposite); About - a unilateral twist (the direction of a twist of a rope and a twist of locks on external provoloka is identical) (fig. A); To - the combined twist (with the directions of a twist of locks alternating through a lock).
For cranes, and also during the work of ropes on blocks with flutes with an undercut and wedge-shaped and on flat rims, the krestovy twist is recommended.
In a case when the design of the mechanism excludes a possibility of torsion of a rope (for example, traction ropes, ropes of mechanisms of change of a departure of arrows) and at the same time semicircular flutes and a single-layer navivka are applied, the unilateral twist is recommended.
Steel ropes of a threefold twist make only a krestovy twist.
On degree of a krutimost distinguish steel ropes: turning (with the identical direction of all locks in strands); MK - a little turning (multilayered mnogopryadny and an unary twist with an opposite direction of a twist of elements on layers).
On mechanical properties distinguish steel ropes from a wire of brands B, I and II.
By the form surface coverings a provolok in a rope distinguish steel ropes: without covering; OZh - with a zinc covering of a wire for especially rigid aggressive working conditions; - with a zinc covering of a wire for rigid aggressive working conditions; With - with a zinc covering of a wire for average aggressive working conditions.
The steel ropes of cargo appointment designated by a letter G are applied to cranes, ropes of a gruzolyudskogonaznacheniye designate letters HL.
The marking group on the temporary resistance to a gap a provolok is accepted usually within 1372-1764 MPas (140-180 kgfs/mm of quarter), occasionally to 1960 MPas (200 kgfs/mm of quarter).
Technical characteristics of steel ropes.
| Name of a steel rope | Design | Diameter, mm | Application |
| Ropes are steel aviation GOST 2172-80 6x7(1+6)+1x7(1+6) |
1,6-2,5 | Are applied as ropes to control systems of planes and helicopters. | |
| Ropes are steel aviation GOST 2172-80 6x19(1+6+12)+1x19(1+6+12) |
3,2-9,5 | ||
| Rope of a steel double twist like LK-R GOST 2688-80, DIN 3059 6х19 (1+6+6/6) +1 lakes of page. |
3,8-56,0 | It is applied as lifting ropes on tower, bridge, ship cranes, truck cranes and other hoisting-and-transport cars. | |
| Rope of a steel unary twist like LK-O GOST 3062-80, DIN 3052 1x7 (1+6) |
0,75-11,5 | It is applied as devices of extensions and guys to the cranes, a cable ropes supporting and benzelny ropes. | |
| Rope of a steel unary twist of type of shopping mall GOST 3063-80, DIN 3053 1x19 (1+6+12) |
1,0-19,0 | The cable and the high-voltage power lines supporting and benzelny ropes is applied as extensions and guys to cranes, the bearing ropes and guys to bridges, lightning-protective. | |
| Rope of a steel double twist like LK-O GOST 3066-80, DIN 3055 6x7 (1+6)+1x7 (1+6) |
1,9-28,5 | Are applied as extensions and guys to cranes, the bearing ropes and guys to bridges, the bearing ropes to suspended roofs, extensions to masts; as extensions for a rigging. | |
| Rope of a steel double twist of type of shopping mall GOST 3067-88 6x19(1+6+12)+1x19 (1+6+12) |
3,1-18,5 | Are applied as ropes of general purpose, except load-lifting cranes, are applied as towing, lesosplavny fastenings, various supporting. Are made with the metal core. | |
| Rope of a steel double twist like LK-O GOST 3069-80, DIN 3055 6х7 (1+6) +1 lakes of page. |
2,2-29,0 | Towages of freight are applied as ropes to equipment of trawlers and extensions of a rigging, to suspended roads. Are made with the organic core. | |
| Rope of a steel double twist of type of shopping mall GOST 3070-88, DIN 3070 6х19 (1+6+12) +1 lakes of page. |
3,3-13,0 | Are applied to cranes as ropes of telfer; ropes for equipment of trawls; in quality a sling for a rigging; for arrangement of lesosplavny fastenings, protections. It is made with the organic core. | |
| Rope of a steel double twist like LK-O GOST 3077-80, DIN 3058 6х19 (1+9+9) +1 lakes of page. |
4,6-46,0 | Are applied as lifting ropes of tower, ship and truck cranes, ropes of telfer; ropes for mining machines, skreperny ropes; the traction and bearing ropes of ropeways; lifting ropes for inclined rise; for elevators. | |
| Rope of a steel double twist like LK-O GOST 3081-80, DIN 3058 6x19 (1+9+9)+7x7(1+6) |
6,0-45,5 | Are applied to cranes as extensions, guys; as lifting ropes of truck cranes; the bearing ropes for ropeways; the directing ropes (conductors) for mine lifting installations; extensions for masts; extensions for a rigging. | |
| Rope of a steel double twist like LK-O GOST 3083-80 6x30 (0+15+15) +7o.s. |
11,5-65,0 | For mooring and towing works on sea and river transport. It is made with the organic core. | |
| Rope of a steel double twist mnogopryadny type LK-R GOST 3088-80 8x19 (1+6+6/6)+1 lakes of page. |
18,5-59,5 | Mine for an equipment suspension bracket, counterbalancing. | |
| Rope of a steel double twist like LK-3 GOST 7665-80, DIN 3057 6х25 (1+6; 6+12) +1o.s. |
9,7-48,5 | Are applied as ropes to hoisting-and-transport cars; vayerny ropes for equipment of trawlers; traction ropes for ropeways; as lifting ropes for vertical mine installations. | |
| Rope of a steel double twist like LK-3 GOST 7667-80, DIN 3057 6х25 (1+6; 6+12) + 7x7 (1+6) |
9,5-47,0 | Are applied as lifting ropes of metallurgical and other cranes, vayerny ropes to trawlers; the bearing ropes for ropeways; lifting ropes for vertical mine installations; vant for bridges. | |
| Rope of a steel double twist like LK-RO GOST 7668-80, DIN 3064 6x36 (1+7+7/7+14) +1o.s. |
8,1-65,0 | Are applied as lifting ropes of tower, bridge, ship, portal and truck cranes; as excavator lifting ropes; vayerny ropes for trawlers; traction ropes for ropeways. | |
| Rope of a steel double twist like LK-RO GOST 7669-80, DIN 3064 6x36 (1+7+7/7+14)+7x7(1+6) |
8,6-64,0 | Are applied as lifting ropes of metallurgical cranes, extensions, boom ropes, extensions, guys to cranes; excavator traction ropes for digging and mining machines; vayerny ropes for equipment of trawlers; the bearing ropes for ropeways; (tail) and directing ropes counterbalancing for mine lifting installations; in construction constructions as the bearing ropes and vant for bridges. |
LLC Company Plazma ® carries out deliveries of steel cables for various application from a warehouse in Kharkiv in terms and for reasonable prices, on conditions, favorable to you.
