Sliding plates (sliders) of the boom of a telescopic truck crane,allow easy movement of the extendable boom section at the base of the metal structure, this eliminates the friction of the boom sections against each other.Fits on the boom section shoes at the front and rear. When worn out, they require replacement.

Slide plates (sliders) telescopic sections reduce friction and smooth running when extending and retracting boom sections, as well as to eliminate gaps between sections, the design provides for installation crawlers between the inner and outer walls of the sections. Fixed sliders are installed in the head lower parts of the first, second and third boom sections, and movable ones - on the upper rear parts of the second, third and fourth sections.

Set of sliders (slide plates) and boom shoes of a telescopic truck crane Motovilikha KS-5579

Set of sliders and shoes for telescopic crane boom consists of the following items:

Sliding plates (sliders) of the KS-5579 truck crane produced by LLC "Plant SDM", Perm

Sliding plates (sliders) of the KS-5579.22 truck crane produced by LLC "Plant SDM", Perm

Slide plates (sliders)truck crane Installed in the root section of the boom and used to smoothly extend / retract the boom sections. The slider is attached to a metal shoe. The main reason for the failure of sliders is wear. It manifests itself with an uneven, jerky movement of the boom sections.

The slide support (slide plate) is designed for decrease in strength friction on boom sections of truck cranes ... To prevent lateral displacement, in the front part of the sections, side stops are provided with the ability to adjust the gap, in the rear of the sections, side plates are installed. On some models of cranes there is a mechanism for locking the sections in the extended state.

Polyamide - an antifrictional self-lubricating composite material, close to metals in mechanical properties, and to polymers in terms of friction conditions, is used for the manufacture of parts of friction and rotation units operating both when lubricated with oils, fresh water, and without lubrication. Polyamide products are lighter in weight, have excellent antifriction properties, high impact resistance, wear resistance, corrosion resistance and a long service life.

Among the advantages of using polyamide sliding plates (crane sliders)

· Reducing operating noise

· Weight reduction (LAMIGAMID density ρ \u003d 1.15 g / cm 3)

· High wear resistance

· High corrosion resistance

· Economical operation

· No maintenance required

· High mechanical strength, rigidity, hardness and toughness

· Good fatigue strength

· High mechanical damping capacity

· Good sliding properties

· Very high wear resistance

· Good insulating properties

· Good workability

· High resistance to high radiation energy (gamma and X-rays)

Our company specializes in the development and production of various products from this modern material. Experts take an active part in the study of operating conditions, in industrial testing of products and help find the necessary technical solutions until the full implementation of parts into operation

Mobile cranes

Metallurgical cranes

Tower cranes

1. Transportation and storage of ropes.

1.1. When the rope is delivered to the place of storage or hitch, the drum must be removed from vehicle lifting mechanisms in such a way as to prevent damage to the rope and drum. It is forbidden to throw the drum with the rope from the vehicle or to remove it in ways that damage it or break the layer of conservation grease.

1.2. The ropes received for storage must be inspected; Lubricate rope sections exposed during transportation and handling. In this case, the lubricant must be compatible with the type of lubricant applied during the manufacture of the ropes. Measure the diameter of the rope.

1.3. During long-term storage, the ropes should be visible along the outer layer and lubricated at least after 6 months.

1.4. Ropes should be stored in ventilated rooms or under a canopy in conditions that exclude the ingress of atmospheric precipitation, away from vapors and corrosive atmosphere. The axis of the drum should be parallel to the floor on which the drum is installed. Do not place drums directly on the ground. They must be installed on special decks, planks or racks.

2. Hitching up the ropes.

2.1. Hitching of ropes should be carried out by a team of workers who are familiar with the hitching instructions developed and approved in accordance with the established procedure for this enterprise.

2.2. When carrying out work on hitching or replacing the rope, it is necessary to ensure measures to prevent the ingress of abrasive and contaminating materials onto the rope surface. For this, work is recommended to be carried out on a special stand made of boards.

2.3. Selection of the direction of lay when winding on a drum. The rope is wound on a drum along a helical line, and at the same time undergoes bending, contact and torsion deformations that cause it to rotate around an axis. It is necessary to select such a lay direction in which, during the winding process, the rope is twisted before being laid on the drum; this will help maintain the tightness of the lay.

2.4. Hitching a new rope should be preceded by a thorough check of the condition of the streams of the system blocks and the grooves of the drums of the corresponding winch. Stream diameter should be 5% -7.5%

larger than the nominal rope diameter. Too narrow block streams pinch and deform the rope, compromising its structural integrity, which can lead to premature exit rope out of order. Too large block grooves create insufficient support for the rope, leading to increased contact pressures and premature rupture of the rope wires.

2.5. Spiral cutting is recommended on winches with single-layer winding on the drum. For multilayer winding, parallel cutting or one of the typical systems (eg Lebus cutting, etc.) is required. In all cases, the appropriate thread pitch, gap and groove depth are of prime importance to obtain good rope running times.

for auxiliary winches, the dimensions of the rope winding elements must comply with the requirements of GOST 3241: the diameter of the drum neck must be at least 15 nominal rope diameters.

2.7. Before unwinding, the transport drum with the rope must be installed on an unwinding device that provides a horizontal position of the drum axis and is equipped with

a braking device to create the required rope tension and to avoid the formation of loops and creases. Slack or uneven rope winding leads to excessive wear, crushing and deformation of the rope.

2.8. The drum in the unwinding device must be installed in such a way that the formation of alternating kinks is excluded, for example, for a winch drum with top winding of a rope, it is necessary to unwind the rope from the transport drum from above.

2.9. In the case of unwinding a rope from the coil of a pre-cut measured piece, it must be installed on a rotary unwinder and pulled by the outer end of the rope, rotating the coil.

Do not unwind the rope from a stationary coil, as this can lead to twisting of the rope and the formation of loops, which during operation can lead to the formation of structural defects on the rope and a significant reduction in the service life of the rope.

2.10. The unwinding device must be installed in such a way that the deviation angle does not exceed 1.5 degrees in case of using a smooth drum and 2.5 ° when using a drum with a screw thread, in order to ensure minimal lateral wear of the rope when rubbing against an adjacent coil in the case of a smooth drum, and the side surface of the cut groove in the case of a helical drum.

At the pulley

If there is a deviation angle when the rope enters the pulley, then the rope first contacts the pulley flange. As it passes through the pulley, the rope goes down the pulley until it descends to the bottom of the groove. During this process, even under tension, the rope will rotate and slide. As a result of rotation, the rope is twisted, i.e. twisting is formed in the rope or the twist comes out of it, shortening or lengthening the lay step of the outer layer of the strands. As the deviation angle increases, the torsion volume increases. To reduce this volume to an acceptable level, the deviation angle should be limited to 2.5 ° for grooved drums and 1.5 ° for smooth drums. When using non-rotating, low-rotating ropes and parallel twisted ropes (i.e. ropes in which

strands and core are twisted into a rope in one operation) the deviation angle must be limited to 1.5 °. However, for some cranes and hoisting systems, for practical reasons it is not always possible to adhere to these general guidelines affecting rope life.

At the drum

without returning to the drum.

In this situation, the problem can be mitigated by installing a "breaker" or by increasing the deviation angle by installing a pulley or winding mechanism. If the rope is allowed to pile up, then, ultimately, it will roll away from the flange and create an shock load, both in the rope and in the structure of the mechanism, which is undesirable and unsafe for operation. Too large deviation angles will

return the rope to the drum prematurely, and create gaps between the rope turns near the flanges, as well as increase the pressure on the rope at the intersection points. Even where there is spiral groove, large deviation angles will inevitably lead to localized areas of mechanical damage, since the wires "cling" to each other. This phenomenon is often referred to as “interference”, but it can be reduced by choosing a one-way lay rope if re-supplying allows. The effect of "interference" can also be reduced by using a compressed strand rope that has a much smoother surface than conventional ropes. Floating pulleys or specially designed compensating devices can also be used to reduce the effect of the deviation angle.

2.10. If it is necessary to cut the rope, at least three dressings of a length equal to two or three diameters of the rope must be applied to it on each side of the cut from a soft wire. Cut the rope by electric welding with simultaneous welding of the end.

2.11. For hanging a new rope using the old one, the following types of ends and connections are recommended:

tapering

looping

non-twisting fit for standard ropes

termination for standard and non-rotating ropes with torsion swivel

for rope with loop

"Chinese stocking"

CAN'T CONNECT ROPE WITH RIGHT SWING- WITH ROPE WITH LEFT SWING

2.12 Types of terminations:

Steel rope casting coupling

A method of embedding a steel rope into a sleeve for casting with a low-melting alloy or polymer.

Wedge clamp.

Method of embedding a steel rope in a wedge sleeve

Steel rope crimping sleeve

Open	Closed

Types of steel couplings for crimping steel rope

3. Running in and tightening of ropes

3.1. Since in the initial period of operation there is a constructive lengthening of the rope and redistribution of stresses in the rope, then after the new rope is hinged up, it is necessary to run and tighten it. Running-in and tightening of the rope should be carried out simultaneously, starting at a low speed and load, with a further increase in load and speed. This will gradually stabilize the internal stresses in the rope and allow it to adapt to the working conditions.

1. Running in and tightening the rope without load:

• ƒ with a minimum speed, 2-3 cycles are performed (the cycle includes winding the rope on the winch drum and winding the rope during the return stroke);
• with the nominal speed of movement, 2-3 cycles are carried out.

2. Running in and tightening the rope at a load of 1/4

• with rated speed, 2-3 cycles are performed.

3. Running in and tightening the rope with a load of 1/2:

• 2-3 cycles are performed at the minimum speed;
• ƒ 2-3 cycles are performed at rated speed.

4. Running in and tightening the rope at full load:

• ƒ 2-3 cycles are performed at minimum speed;
• ƒ further work is performed at full load at rated speed.

4. Operation of ropes

4.1. After hitching, running in and tightening the ropes, inspect the ropes, attachment points and, in the absence of deviations, carry out their operation as usual.

4.2. The ends of the outer wires cut off during operation must be removed from the rope by bending them back and forth with pliers until the wires break deep in

the gap between the two outer strands.

4.3. .The rope should be lubricated with grease at regular intervals during operation. Service lubricant must be compatible with the type of lubricant applied during manufacture, which is indicated on the rope certificate.

• Before applying a fresh coat of lubricant to the rope, it must be cleaned of foreign elements such as dust, sand, pieces of rock, etc.
• The type and method of applying the lubricant should ensure that all wires in the rope are evenly coated with a thin layer.
• Do not use uncleaned or used lubricants. they can be contaminated with caked particles or acids, which can also have a negative effect on the rope

4.4. It is necessary to monitor the condition of the grooves on the drums and blocks. The operation of the rope with worn-out streams leads to a decrease in the contact area and, as a result, to deformation and

violation of the rope structure. During the operation of the crane, as well as during its transportation and installation, rope-block systems

may have the following malfunctions, falling out of the rope from the block stream; jamming of ropes on blocks; twisting the cargo rope; chafing of ropes; breaks of wires, strands and rope

generally; wear of the stream and flanges of blocks; breakage of blocks. Falling out of a rope from a stream of blocks leads to rubbing it against the sharp edges of metal structures, breaking and falling of a load or an arrow. The rope can fall out due to the fact that the guardrails are bent, the rope is stretched obliquely in relation to the block, or it is incorrectly stored. In the latter case, the rope wedges between the flange and the fence and bends it.

Jamming of the ropes on the blocks can occur if the bearings of the block are jammed or the rope touches the guard of the block. In view of the fact that these malfunctions lead to intensive wear of the stream of blocks and the rope, they must be immediately eliminated. If the guardrail is bent, it should be straightened or unbent, ensuring free passage of the rope. The block bearings must be cleaned and filled with clean grease or replaced with new ones. If the lubrication holes are clogged, they must be cleaned.

The wear of the grooves and flanges, blocks, as a rule, occurs if the bearings of the block are seized or the rope is pulled obliquely. When the bearings are poorly lubricated and they are seized, the rope slides over the block, which in an abrasive environment (dust, sand) leads to a rapid development of a stream or block flanges. Blocks are generated especially quickly

at a small angle of coverage by the rope, since the pressure force of the rope is insufficient for the rotation of the block. In the oblique direction of the rope, one-sided wear of the side surface of the flanges of the blocks occurs. To prevent this, work should be avoided, causing oblique tension of the rope, pulling the load, lifting the hook block to the limit.

4.5. The twisting of the cargo rope is observed with a long suspension length. This usually occurs due to the fact that the rope was unwound from the coil incorrectly during its reeving on blocks or when the rope is very stiff. Failure can be prevented by untwisting the rope or using an anti-twist device.

Chafing of the ropes occurs, as a rule, when they are incorrect

stockpile. In this case, during crane operation, the ropes touch as

each other and metal structures. The ropes also fray when an attempt is made to lift the load while the rope is twisted. Since crane operation with frayed rope can lead to the fall of the load or the boom, it is necessary to prevent this malfunction. To do this, you need to spread the ropes at a distance at which they cannot touch the metal structure and touch each other.

4.6. Defects of steel ropes during operation

	wire buckling insufficient lubrication during operation;
	core bulging instability to torsion and / or shock loading
	local diameter reduction core damage
	swelling of a strand mechanical damage during mounting, incorrect multilayer winding on a drum
	localized wear the effect of abrasion on the supporting structure
	kink formation incorrect unwinding, hitch
	formation of defects such as a wave or a spin in the ropes the radii of the grooves of the pulley and the cutting of the drum do not correspond nominal rope diameter + 5%; deviation angle.
	basket-like deformation twisting of the rope when hanging, impact on the rope shock load, violation of felling rules when hitching, wear groove grooves on the drum and grooves of pulleys
	external wear
	surface corrosion insufficient lubrication, presence on the surface rope corrosive substances and moisture
	bursts of wires bending result with increasing load and decreasing bending radius; inconsistency of the drum diameter;
	buckling of the rope core due to accumulation of torsion
	local increase in rope diameter core breakdown
	a loop incorrect unwinding, rope attachment
	significant wear of wires rope large deviation angle; high reference pressure; abrasive wear; jamming of pulleys;
	strong internal corrosion. insufficient lubrication

ATTACHMENT 1

Minimum coefficients for choosing the diameters of the drum (h1), block (h2) and equalizing block (h3).

The minimum diameters of drums, blocks and equalizing blocks bent by steel ropes are determined by the formulas:

D1 \u003d h1 * d; D2 \u003d h2 * d; D3 \u003d h3 * d. where d is the diameter of the rope, mm D1, D2, D3 are the diameters, respectively, of the drum, block and equalizing block along the centerline of the wound rope, mm h1, h2, h3 are the coefficients for choosing the diameters of the drum, block and equalizing block, respectively (according to Table 1) ...

One-sided nney

* D - drum diameter, mm;
d - rope diameter, mm.