The rope of man-made fibers for transmitting the driving force of friction from the drive pulley

 

(57) Abstract:

The invention relates to the construction of the cable used for lifts, which is connected to the car and counterweight. The cable consists of load-bearing strands of hair from synthetic fibers, the outer layer of strands covered with a circular closed shell of synthetic material, and bearing the load locks in multiple layers of strands wound around the core. Circular closed shell of synthetic material from the outer perimeter of the cable fills the intermediate space between the supporting strands of the outer layer. Between the outer layer of strands and the inner layer of strands may be located intermediate the shell, reducing friction. The cable may have a cushioning strands between the layers of strands of hair from synthetic fibers, with load-bearing strands can be originated from aromatic polyamide fibers and impregnated with a solution of polyurethane containing polyurethane 10-60%, and the outer surface of the sheath of the cable can be made smooth or structured. The invention provides the ability for an application to rope big shift efforts and increase the service life of the rope. 6 C.p. f-crystals, 5 Il.

The invention concerns a cable as the national Assembly consists of synthetic fibers.

Up to the present time the Elevator industry uses steel cables, which are connected with cabins or lifting devices and balances, in the simplest case, in a 1:1 ratio. However, the use of steel cables brings with it some drawbacks. Due to the large own weight steel cable lifting height of the lift is limited. In addition, the coefficient of friction between the metal work pulley and steel cable is so small that the coefficient of friction must be improved through various measures, for example, a special form of grooves or special coverage of the grooves in the working pulley or by increasing the angle of circumference. In addition, the steel cable acts between the drive and booths lift as a sound bridge, which means a reduction in driving comfort. To reduce these undesirable effects, the need for costly structural measures. Besides steel cables stand in comparison with cables of synthetic fibers of a smaller number of cycles of bending, subject to corrosion and must be regularly maintained.

From the patent Switzerland 495911 known push-on ring for lining chutes wire rope Cana is a wire rope consisting of an elastic material. To ensure the best possible removal of internal heat, the filler ring is composed of multiple remote from each other separate segments.

Occur as a result of heat expansion plug ring is compensated by gaps between the individual segments. When the load wire rope elastic material can be moved in the slots and through this to some extent is unloaded so that the groove of the pulleys cracks are not formed. When the local wears a push-on ring segments should be replaced.

In the above-described invention of the steel cable is used as a supporting tool, which has the disadvantages indicated above. Due to the small length of the working surface of the cable pulley in relation to the length of the steel rope elastic inset severely worn and thus must be replaced often, which entails high maintenance costs.

Also known rope of man-made fibers for transmitting the driving force of friction from the drive pulley, consisting of load-bearing strands of hair from synthetic fibers, and load bearing strands of synthetic fibers in the outer layer of strands wound Vokrug.05.1976).

Known cable is designed for winches cranes used in lifts, with the cab and the counterweight, it is not possible to ensure its endurance and increase service life, because the interaction of the shell with traveldesk pulley roaming shell formed would wypociny and the rope could not long be operated. In addition, the cable is not intended for the perception of a great effort shift.

Thus the basis of the invention is the creation of a rope as a supporting means for the lifts mentioned at the beginning of a type that does not have the aforementioned disadvantages and which increases the comfort of transportation. This problem is solved with the assistance described in paragraph 1 of the invention.

In addition, the technical result of the claimed invention is the ability of the application to rope big shift efforts and increase the service life of the rope.

This is achieved by the fact that in the rope of man-made fibers for transmitting the driving force of friction from the drive pulley, consisting of load-bearing strands of hair from synthetic fibers, and load bearing strands of synthetic fibers in the outer sleeo material, bearing the load locks in multiple layers of strands wound around the core, and a circular closed shell of synthetic material from the outer perimeter of the cable is filled intermediate space between the supporting strands of the outer layer of strands.

Between the outer layer of strands and the inner layer of strands of wire may be located intermediate the shell, reducing friction.

The cable may have a cushioning strands between the layers of strands of hair from synthetic fibers, with load-bearing strands can be originated from aromatic polyamide fibers and impregnated with a solution of polyurethane containing polyurethane 10-60%.

The outer surface of the shell can be made smooth.

The outer surface of the shell can be structured.

Achieved by using the invention, advantages can be seen mainly in the fact that consists of multiple layers of coated wire, of artificial fibers, strands which are not processed or treated with an impregnating agent, are compared with steel cables significantly higher capacity and almost no maintenance.

Using the in complement is referred to in paragraph 1 of the rope of man-made fibers. Cable cover from artificial fibers creates on your pulley higher coefficients of friction, so that you can save a smaller girth. The coefficient of friction can be affected by using different properties of the shell surface. This makes it possible to unify workers pulleys, so as no longer required various forms of gutters. For steel rope diameter pulley should be at least 40 times the diameter of the rope. When using cables of synthetic fibers based on their properties, the diameter of the pulley, you can choose significantly less. Cables, of synthetic fibers allow for comparison with steel cables with the same ratios of diameters greater number of bends alternating cycle. Thanks to its light weight rope of man-made fibers in comparison with wire along with a decrease in the amount of the compensation ropes you can use significantly less tension weight. Due to the aforementioned improvements for the calculation of the actuator produces a smaller required starting torque and torque, resulting drunkard inrush current or power consumption. Thanks to this can be reduced sizes of drive motors. To the rope, along with increasing driving comfort also permits the reduction of constructive steps to isolate the cab.

The drawings show an exemplary embodiment of the invention and explained in more detail below. In the drawings presents:

Fig.1 - cut the rope of man-made fibers in accordance with the invention,

Fig.2 - the picture in perspective of the rope of man-made fibers in accordance with the invention,

Fig.3 is a schematic illustration of the lift,

Fig.4 is a schematic illustration of the lift with the suspension at a scale of 2:1,

Fig. 5 is a cross section cut of a working pulley located on the cable of synthetic fibers in accordance with the invention.

Fig. 1 shows a section of the cable 1 from artificial fibers in accordance with the invention. The casing 2 surrounds the outer layer 3 strands. Shell 2 made of synthetic material, preferably polyurethane, increases the coefficient of friction of the cable 1 from the desktop pulley. The outer layer 3 strands must be so large adhesion forces with the shell 2, so that it does not shift generated by the load cable 1 pulling effort or not extended. These adhesion forces are achieved due to the fact that obranlja between strands 4 are filled and formed a large holding surface. Strands twisted or sbivautsa of individual fibers 5 of the aromatic polyamide. Each individual strand 4 to protect the fibers 5 is processed impregnating agent, for example with a solution of polyurethane. The ability of the cable 1 to withstand the alternating bending stress depends on the amount of polyurethane in each of the 4 strands. The higher the proportion of the polyurethane, the higher the ability to withstand the alternating bending stress. However, increasing the proportion of polyurethane reduces the carrying capacity and the modulus of elasticity of the cable 1 from artificial fibers. Depending on the required ability to withstand alternating loads, the proportion of polyurethane for impregnation of the strands 4 can be, for example, from 10 to 60 percent. Individual strands 4 suitable way can also be protected using a braided sheath of polyurethane fibers.

To avoid wear of the strands on the desktop pulley due to the mutual friction between the outer layer 3 strands and the inner layer 6 strands is to reduce the friction of the intermediate membrane 7. This also reduces friction effect can be achieved by processing located underneath the strands 4 silicone. Thus in the outer layer 3 strands in the inner, wear is maintained at a low level. Other means of preventing wear due to the friction of the strands 4 could be elastic filler, which connects the strands 4 to each other, not too much reducing the flexibility of the cable 1.

In contrast to a pure holding ropes lifting cables should be twisted or slivatsa very compact and durable, so they are not deformed on the desktop pulley or started to curl on their own twist or bias. Therefore, the gaps and hollow spaces between the individual layers of strands 4 are filled cushioning strands 9, which act as protection in relation to other strands 4 to get almost all the layer 6 strands and increase the degree of filling. These cushioning strands 9 are composed of synthetic material, for example polyamide.

These consist of highly oriented molecular chains and fiber 4 of the aromatic polyamide has a high ultimate tensile strength. However, in contrast to steel fiber 5 of the aromatic polyamide because of their atomic structures have only a little strength in the transverse direction. For this reason, conventional steel cable locks can't impolitely greatly reduce the breaking load of the rope 1. Proper connection of the cable 1 from artificial fibers is known from PCT/CH 94/00044.

Fig. 2 shows the image in perspective of the structure of the cable 1 from artificial fibers in accordance with the invention. Twisted or woven from fibers 5 of the aromatic polyamide strands 4, including stuffing strands 9, Suite layers around the core 10 with a left or right twist. Between the inner and the outer layer 3 strands is to reduce the friction of the intermediate membrane 7. The outer layer 3 strands covered by the shell 2. To determine the specific coefficient of friction surface 11 of the shell 2 can be performed structured. The task of the shell 2 is to provide the desired coefficient of friction for the work of the pulley and protect strands 4 from mechanical and chemical damage and UV rays. Load is perceived solely by the 4 strands. Made of fibers 5 of the aromatic polyamide cable 1 has the same cross-section as compared with steel rope significantly higher load carrying capacity and only 1/5-1/5 of the share. Therefore, for the same payload diameter of the cable 1 from artificial fibers can be reduced by Isen from corrosion. Maintenance, as in the use of steel cables, for example, lubrication of cables, is no longer needed.

Another type of run of the cable 1 from artificial fibers lies in the different versions of the shell 2.

Instead of using all environmental the outer layer 3 of the shell 2, each individual strand 4 is equipped with a separate closed circle shell, preferably made of polyurethane or polyamide. However, the rest of the structure of the cable 1 from artificial fibers similar to those described and shown in Fig.1 and 2 option run.

Fig. 3 shows a schematic representation of the lift. Submitted to the shaft 12 of the lift cabin 13 is driven by the driving motor 14 with a working pulley 15 by means of the cable 1 from artificial fibers in accordance with the invention. At the other end of the cable 1 is suspended counterweight 16, employee compensation authority. Now the coefficient of friction between the cable 1 and an operating pulley 15 is calculated so that when mounted on the shock absorber 17 the counterweight 16 prevents further transport of the cab 13. The mounting cable 1 on the cab 13, the counterweight 16 is carried out using 16 nodes end kriplani ogen on the counterweight or the cabin, the coefficient of friction between the cable 1 and the guide pulley should be as small as possible to keep friction losses to a low level. In this case, the guide pulley does not transmit the drive torque on the cable 1. To this end, the casing 2 to reduce the coefficient of friction can be also made of nylon instead of polyurethane.

Fig. 4 shows a schematic representation of the lift with the suspension at a scale of 2: 1. In this system, end mount 18 of the cable 1 from artificial fibers are not on the cab 13 and not on the counterweight 16 and respectively on the upper end of the shaft 19.

Fig. 5 shows the wire 1 made of synthetic fibres operating pulley 15 in cross section. The shape of the trench 20, coupled to the driving motor 14 of the lift working pulley 15, for optimal contact of the cable 1 is made preferably semicircular. As the cable 1 when the load is slightly deformed on a supporting surface, you can also select the oval shape of the gutter. These simple forms of the gutter can be used because the shell 2 made of synthetic material creates a sufficiently large coefficient of friction. Along with this, due to the high coefficient of friction may biosatellite can be made the same, since the coefficient of friction is determined by the surface structure 11 and the material of the shell 2. Thereby can be reduced also too large in some cases friction to prevent the transportation of cargo when planted the counterweight Assembly test/. Additionally, because of the small diameter of the cable 1 from artificial fibers and associated possible small diameter pulley 15 its size can be reduced. A small diameter pulley leads to a small torque of the actuator and thereby to the small size of the motor. Simplified and reduced the price also manufacturing and warehousing business pulleys 15. Thanks to the large contact surface of the cable 1 into the groove 20 also get a small pin voltage, which significantly increases the service life of the rope 1 and the operating pulley 15. Made from the fibers 5 of the aromatic polyamide cable 1 does not allow for the same outbound from the operating pulley 15 frequencies. Therefore, there is no diminishing comfort transportation excitation of the cab through the cable 1.

Due to the increased coefficient of friction, a small corner of the circumference and light weight cable 1 from iskusstvennuyu and torques and moments on the shaft drive machines. Therefore, reduced starting currents or total energy consumption. This in turn reduces the size of the motors and gear mechanisms and the sizes of the feeding motor converters.

1. The rope of man-made fibers for transmitting the driving force of friction from the drive pulley, consisting of load-bearing strands 4, of artificial fibers, and bearing the load 4 strands of synthetic fibers in the outer layer 3 strands wound around the core 10 and the outer layer 3 strands covered with a circular closed shell 2 made of synthetic material, characterized in that the load bearing strands 4 in several layers 3, 6 strands wound around the core 10 and the circular closed shell 2 made of synthetic material from the outer perimeter of the cable is filled intermediate space between the bearing 4 strands of the outer layer 3 strands.

2. The cable under item 1, characterized in that between the outer layer 3 strands and the inner layer 6 strands located intermediate the shell 7, reduce friction.

3. The cable under item 1, characterized in that the cable has a padded strands 9 between the layers 3, 6 4 strands of synthetic fibers.

4. The cable under item 1, characterized in that the bearing 4 strands impregnated with a solution of polyurethane containing polyurethane 10-60%.

6. The cable under item 1, characterized in that the outer surface of the sheath 2 of the cable are made smooth.

7. The cable under item 1, characterized in that the outer surface of the sheath 2 of the cable is structured.

 

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