Using original qualitative parts allows hoisting cranes to operate much more time and ensures the maximum performance.
Careful incoming control of casting and forging for crane parts and a streamlined production process are a guarantee of high quality of our crane equipment.
Types of supplied parts:
1. Crane drums.
They serve for winding hauling ropes of crane mechanisms. They are made of a cast section or a tube. The tube has welded flanges which the bottom with hubs with a pressed shaft is screwed to. As a rule one bottom has a ring gear for junction of a crane load drum with a reducer.
2. Crane wheels.
They represent a basic constituent element of crane equipment: this is a lead element of cranes moving on rails independently or on load trolleys. They are divided according to the size of a hub, a number of flanges and a rim shape. Classifying them according to the first feature they can be one-, two-flange and flangeless, according to the second feature they can be cylindrical and conic.
To provide the correct work of shafts, instead of their rigid joint they use flexible couplings which reduce influence of the shafts coaxiality due to the coupling parts mobility. Generally two types of couplings are used in cranes: pin and gear. The coupling consists of two half-couplings put on cylindrical or conic ends of the shafts joined.
5. Brake pulleys.
This is a wheel with a wide rim covered by a shoe mechanism, an endless strap or belt. Most often crane mechanisms have two-shoe spring brakes like TKT with a short-run electromagnet of alternating current and brakes with an electrohydraulic pusher. They are installed between a motor shaft and a reducer input shaft or on the back side of the reducer input shaft.
6. Crane blocks.
They are an element of cranes and other hoisting machines and used in blocks of hook assemblies, mounting and levelling blocks. The structure of a crane block is a wheel with a circular chute intended for a rope.
The sizes of a crane pulley groove profile are chosen according to the maximum possible area of the rope and groove contact. The standard of culling for crane blocks is the groove wear of more than 40% of the initial radius of the pulley groove, after that the pulley is to be replaced.
7. Hook assemblies.
They are intended for cargo hoisting and gripping. The structure of hook assemblies represents cast flanges with (rotating) blocks between them and a load hook fixed to them. The running block and hook are combined with flanges and a cross bar. Hook assemblies can be standard and shortened. The difference between them is that blocks and a cross bar (where a hook is fixed) in standard assemblies are combined with flanges and in the shortened ones it is on the polyspast blocks. Shortened assemblies can have just an even number of blocks.
8. Hoisting hooks.
This hauling device is used in all kinds of cranes, lifting blocks, hoists.
Depending on the modification hoisting hooks can have a short or long cylindrical shank. In the whole number of situations they can have a special safety lock which protects a removable hauling device from spontaneous falling out. This hauling device should be chosen based on such criteria as a lifting capacity, a drive type and a mechanism operating mode. There are two basic types of the safety lock: a lock-counterweight and a lock-latch.
9. Crane brakes.
This is a mechanism including brake shoes, a frame structure, a squeeze spring and a hydraulic pusher. The principle of their action is based on two forces which counteract with each other that allows creating tripping efforts on brake shoes through a puller bolt located at the bottom of the brake system mobile part.
The most common crane brakes are ТКG and ТКТG series where Т – brake, K – shoe, G – with a hydraulic drive (hydraulic pusher).
10. Crane brake shoes.
This is the main part of the brake system, its working component. The brake acceleration is caused by a shoe that results from the interaction of a wheel or a brake disk with a roll surface and also from the transformation of the pressure force directly during the braking torque.
This is a metal frame of a tear-shaped, round or triangular shape, smooth inside and with a chute outside. A deadeye is a bent plate with a chute-shaped section, mainly an element of the lifting system on ships.
Deadeyes are intended for installation on ropes when a loop is made, protecting them from fraying through and making loops smoother.
Deadeyes of КD type are produced to joint with the central rope of vertical lift, by gripping the rope from both sides. Wedge-like deadeyes of ККP type are produced to joint conductors and balance ropes. Wedge-like deadeyes of КRG type are produced to joint conductors and balance ropes which have a stand structure.
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