A design method for the climbing boss of a double-folded drum

Abstract

The present invention provides a method for designing a climbing boss of a double-fold line drum, which comprises: obtaining the circumferential angle of the wire rope on the double-fold line drum to obtain a first circumferential angle θ, and obtaining the circumferential angle corresponding to the first fold line segment to obtain a second circumferential angle γ; obtaining the theoretical height and theoretical width of the first climbing boss in the first fold line segment to obtain a first theoretical width b z1 and the first theoretical height h z1 , and obtain the horizontal deformation Δb and vertical deformation Δh of the cross section of the wire rope when it is compressed in actual work; calculate the actual width and actual height of the first climbing boss in the first broken line segment based on the above parameters. This solution can eliminate the influence of the elastic characteristics of the wire rope, realize the quantitative design of the first climbing boss, enable the wire rope to climb stably, avoid the effects of wire rope skipping, rope loosening or rope biting, thereby improving the stability of the wire rope transmission system and extending the service life of the wire rope.

Description

Technical Field

[0001] The invention relates to the technical field of double-folded-line reels, in particular to a design method for a climbing boss of a double-folded-line reel. Background Art

[0002] With the development of large-scale lifting equipment, the traditional single-layer winding method of wire rope can no longer meet the working requirements of the winding system due to the limitation of rope capacity, and the wire rope can only be wound in multiple layers. The smooth winding of wire rope on the drum is the premise for the normal and stable operation of the multi-layer winding wire rope transmission system. At present, the double-fold multi-layer winding has been proven to achieve the regular and orderly arrangement of multiple layers of wire rope on the drum, and is widely used in various hoisting mechanisms.

[0003] For example, patent CN 201999672 U discloses a double-fold drum for use on a rotary drilling rig winch, which includes a drum wall, a drum rope groove formed on the outer circumferential surface of the drum wall, and a boss (climbing boss), wherein the drum rope groove is composed of a diagonal rope groove and a straight rope groove, and the diagonal rope groove and the straight rope groove are alternately arranged within a complete circle so that the point contact area between the rope strands is greatly reduced, the friction is reduced, and the load between the layers is evenly distributed.

[0004] However, the existing climbing boss design is based on the assumption that the cross-section of the wire rope is rigid, ignoring the lateral elastic characteristics of the wire rope, that is, it does not consider the change in the cross-sectional shape of the wire rope when it is subjected to axial tension and radial pressure at the same time, and fails to accurately quantify the size of the climbing boss, resulting in rope skipping, rope overlapping or rope biting during the winding process, which seriously affects the stability of the wire rope transmission system and the service life of the wire rope. Summary of the invention

[0005] In view of this, it is necessary to provide a design method for the climbing boss of a double-fold drum to solve the technical problem that the climbing boss design in the prior art is based on the assumption that the cross-section of the wire rope is rigid, ignoring the lateral elastic characteristics of the wire rope and failing to accurately quantify the size of the climbing boss.

[0006] The present invention provides a method for designing a climbing boss of a double-fold line drum, wherein the double-fold line drum is provided with a first fold line segment, a first straight line segment, a second fold line segment and a second straight line segment connected in sequence along its circumference, and one side of the double-fold line drum in the axial direction is a folding side, and the other side opposite thereto is a rope entry side, and the folding side is provided with a first climbing boss at least partially located in the first fold line segment, and the method for designing a climbing boss of the double-fold line drum comprises:

[0007] Step S1: obtaining the circumferential angle of the steel wire rope on the double-fold line drum to obtain a first circumferential angle θ, and obtaining the circumferential angle corresponding to the first fold line segment to obtain a second circumferential angle γ;

[0008] Step S2: Obtain the theoretical height and theoretical width of the first climbing boss within the first folding line segment to obtain a first theoretical width b z1 and the first theoretical height h z1 , and obtain the horizontal deformation Δb and vertical deformation Δh of the cross section of the wire rope when it is compressed in actual work;

[0009] Step S3: According to the first circumferential angle θ, the second circumferential angle γ, the first theoretical width b z1 、The first theoretical height h z1 , the horizontal deformation Δb, and the vertical deformation Δh, calculate the actual width and actual height of the first climbing boss in the first folding line segment to obtain a first actual width B z1 and the first actual height H z1 , and its calculation formula is:

[0010]

[0011] When the steel wire rope is at one end of the first broken line segment close to the second straight line segment, the corresponding first circumferential angle θ is 0°.

[0012] Optionally, step S2 further includes:

[0013] Obtain the diameter of the wire rope when it is assumed to be rigid to obtain the first theoretical diameter d 1 ;

[0014] According to the first theoretical diameter d 1 , the first circumferential angle θ, and the second circumferential angle γ, calculate the first theoretical width b z1 , and the first theoretical height h z1 , and its calculation formula is:

[0015]

[0016] Optionally, the first climbing boss extends from the first folded line segment to the first straight line segment, wherein the actual width of the first climbing boss in the first straight line segment is B. z2 , and the actual height is H z2 ,satisfy:

[0017]

[0018] in, And θ=γ.

[0019] Optionally, the first climbing boss extends from the first folded line segment, via the first straight line segment, to the second folded line segment, an end of the first folded line segment close to the second straight line segment is a first end, and an end of the second folded line segment close to the first straight line segment is a second end, and step S3 further includes:

[0020] Step S31: Obtain the circumferential angle α corresponding to the interval segment between the first end and the second end to obtain a third circumferential angle α, and obtain the theoretical width and theoretical height of the first climbing boss in the second broken line segment to obtain a second theoretical width b z3 and the second theoretical height h z3 ;

[0021] Step S32: according to the first circumferential angle θ, the second circumferential angle γ, the horizontal deformation Δb, the vertical deformation Δh, the third circumferential angle α, the second theoretical width b z3 , and the second theoretical height h z3 , calculate the actual width and actual height of the first climbing boss in the second broken line segment to obtain the second actual width B z3 and the second actual height H z3 , and its calculation formula is:

[0022]

[0023] Optionally, step S31 includes:

[0024] Obtain the diameter of the wire rope when it is assumed to be rigid to obtain the second theoretical diameter d 2 ;

[0025] According to the second theoretical diameter d 2 , the first circumferential angle θ, the second circumferential angle γ, and the third circumferential angle α, calculate the second theoretical width b z3 , and the second theoretical height h z3 , and its calculation formula is:

[0026]

[0027] Optionally, a second climbing boss is provided on the rope entry side, and the second climbing boss is at least partially located on the first fold line segment, and step S3 further includes:

[0028] Step S33: Obtain the theoretical height and theoretical width of the second climbing boss within the first fold line segment to obtain a third theoretical width b r1 and the third theoretical height h r1 ;

[0029] Step S34: according to the first circumferential angle θ, the second circumferential angle γ, the horizontal deformation Δb, the vertical deformation Δh, the third theoretical width b r1 , and the third theoretical height h r1 , calculate the actual width and actual height of the first climbing boss in the first fold line segment to obtain a third actual width B r1 and the third actual height H r1 , and its calculation formula is:

[0030]

[0031] Optionally, step S33 includes:

[0032] Obtain the diameter of the wire rope when it is assumed to be rigid to obtain the third theoretical diameter d 3 ;

[0033] According to the third theoretical diameter d 3 , the first circumferential angle θ, and the second circumferential angle γ, calculate the third theoretical width b r1 , and the third theoretical height h r1 , and its calculation formula is:

[0034]

[0035] Optionally, the second climbing boss extends from the second straight line segment to the first broken line segment, wherein the actual width B of the second climbing boss in the second straight line segment is r2 , and actual height H r2 satisfy:

[0036]

[0037] in, And θ=0°.

[0038] Optionally, the second climbing boss extends from the second folded line segment, via the second straight line segment, to the first folded line segment, an end of the first folded line segment close to the second straight line segment is a first end, and an end of the second folded line segment close to the first straight line segment is a second end, and step S34 further includes:

[0039] Step S341: Obtain the circumferential angle α corresponding to the interval segment between the first end and the second end to obtain a third circumferential angle α, and obtain the theoretical width and theoretical height of the second climbing boss in the second broken line segment to obtain a fourth theoretical width b r3 And the fourth theoretical height h r3 ;

[0040] Step S342: According to the first circumferential angle θ, the second circumferential angle γ, the horizontal deformation Δb, the vertical deformation Δh, the third circumferential angle α, the fourth theoretical width b r3 , and the fourth theoretical height h r3 , calculate the actual width and actual height of the second climbing boss in the second broken line segment to obtain a fourth actual width B r3 and the fourth actual height H r3 , and its calculation formula is:

[0041]

[0042] Optionally, step S341 further includes:

[0043] Obtain the diameter of the wire rope when it is assumed to be rigid to obtain the fourth theoretical diameter d 4 ;

[0044] According to the fourth theoretical diameter d 4 , the first circumferential angle θ, and the second circumferential angle γ, calculate the fourth theoretical width b r3 , and the fourth theoretical height h r3 , and its calculation formula is:

[0045]

[0046] Compared with the prior art, in the design method of the climbing boss of the double-folded drum provided by the present invention, it is possible to first assume that the wire rope has a rigid characteristic to obtain the theoretical width of the first climbing boss in the first folded line segment (i.e., the first theoretical width b z1 ) and theoretical height (i.e. the first theoretical height h z1 ), combined with the circumferential angle of the wire rope on the double-fold drum (i.e., the first circumferential angle θ), the circumferential angle corresponding to the first fold line segment (i.e., the second circumferential angle γ), and the horizontal deformation Δb and vertical deformation Δh of the cross section of the wire rope under working pressure due to its elastic characteristics, the actual width of the first climbing boss in the first fold line segment (i.e., the first actual width B z1 ) and the actual height (i.e. the first actual height H z1 ). In this way, the influence of the elastic characteristics of the wire rope can be eliminated, and the quantitative design of the first climbing boss can be realized, so that when the double-fold drum is winding the wire rope, the wire rope can stably climb from the first layer to the second layer via the first climbing boss, avoiding the effects of the wire rope jumping, rope loosening or rope biting, thereby improving the stability of the wire rope transmission system and extending the service life of the wire rope.

[0047] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail as follows with reference to the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0049] Figure 1 It is the unfolded view of the double-fold drum rope groove surface;

[0050] Figure 2 A schematic flow chart of an embodiment of a method for designing a climbing boss of a double-folded drum provided by the present invention;

[0051] Figure 3 It is the winding arrangement diagram of the first layer of steel wire rope in the first broken line segment on the return side;

[0052] Figure 4 It is a schematic diagram of deformation when the cross section of the wire rope has elastic characteristics;

[0053] Figure 5 It is the winding arrangement diagram of the first layer of steel wire rope in the second broken line segment on the return side;

[0054] Figure 6 The winding arrangement diagram of the second layer of steel wire rope in the first broken line segment on the rope entry side;

[0055] Figure 7 This is the winding arrangement diagram of the second layer of wire rope in the second broken line segment on the rope entry side.

[0056] Description of reference numerals:

[0057] 100-double fold line drum, 1-first fold line segment, 2-first straight line segment, 3-second fold line segment, 4-second straight line segment, 5-first climbing boss, 6-second climbing boss, 7-return side, 8-rope entry side, 81-rope entry port, 9-drum end plate, 200-wire rope. DETAILED DESCRIPTION

[0058] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0059] See also Figures 1 to 3The climbing boss design method of the double-fold reel is that the double-fold reel 100 is provided with a first fold line segment 1, a first straight line segment 2, a second fold line segment 3 and a second straight line segment 4 which are connected in sequence end to end along its circumference, and one side of the double-fold reel 100 in the axial direction is a folding side 7 and the other opposite side is a rope entry side 8, and the folding side 7 is provided with a first climbing boss 5 which is at least partially located on the first fold line segment 1.

[0060] It should be noted that the double-fold drum 100 is composed of a drum body with a double-fold rope groove, a climbing boss and two end plates on both sides. The drum body surface of the double-fold drum 100 is processed with a special structure rope groove consisting of two straight segments perpendicular to the drum axis and two folded segments at a certain angle to the drum axis alternately connected to each other. In the double-fold drum, the side where the wire rope 200 starts to be wound into the drum is recorded as the rope entry side 8, and the other side is recorded as the return side 7. The rope entry side 8 is provided with a rope entry port 81. In this embodiment, the return side 7 is provided with a first climbing boss 5 of a special shape to guide the wire rope 200 to climb and wind from the first layer to the second layer.

[0061] Based on the above structure, a first embodiment of the climbing boss design method of the double-fold line reel is proposed, which includes:

[0062] Step S1: obtaining the circumferential angle of the steel wire rope 200 on the double-fold line drum 100 to obtain a first circumferential angle θ, and obtaining the circumferential angle corresponding to the first fold line segment 1 to obtain a second circumferential angle γ;

[0063] It should be noted that, in this embodiment, the circumferential angle of the steel wire rope 200 on the double-fold line drum 100 is based on the end of the first fold line segment 1 close to the second straight line segment 4 as the starting point, that is, when the steel wire rope 200 is at the end of the first fold line segment 1 close to the second straight line segment 4, the first circumferential angle θ is 0°; and when the steel wire rope 200 is at the end of the first fold line segment 1 close to the first straight line segment 2, the first circumferential angle θ is γ. In addition, it should be understood that the circumferential angle corresponding to the first fold line segment 1 is the angle corresponding to the arc segment between its end close to the second straight line segment 4 and its end close to the first straight line segment 2.

[0064] Step S2: Obtain the theoretical height and theoretical width of the first climbing boss 5 within the first folding line segment 1 to obtain a first theoretical width b z1 and the first theoretical height h z1 , and obtain the horizontal deformation Δb and the vertical deformation Δh of the cross section of the steel wire rope 200 when it is compressed in actual work;

[0065] It should be noted that in step S2, the first theoretical width b z1 and the first theoretical height h z1The cross section of the steel wire rope 200 is obtained when the cross section is rigid and closely arranged. At this time, the lateral spacing between the penultimate turn of the first layer of steel wire rope 200 in the first fold line segment 1 and the adjacent drum end plate 9 is B. 1 , satisfying B 1 =B z1 ; and the longitudinal distance between the steel wire rope 200 of the climbing section of the return side 7 and the bottom of the drum rope groove is H 1 , satisfying H 1 =H z1 .

[0066] Step S3: According to the first circumferential angle θ, the second circumferential angle γ, and the first theoretical width b z1 , first theoretical height h z1 , horizontal deformation Δb, and vertical deformation Δh, calculate the actual width and actual height of the first climbing boss 5 in the first fold line segment 1 to obtain the first actual width B z1 and the first actual height H z1 , and its calculation formula is:

[0067]

[0068] In this way, the present solution can first assume that the steel wire rope 200 is rigid, so as to obtain the theoretical width of the first climbing boss 5 within the first broken line segment 1 (ie, the first theoretical width b z1 ) and theoretical height (i.e. the first theoretical height h z1 ), combined with the circumferential angle of the steel wire rope 200 on the double-fold drum 100 (i.e., the first circumferential angle θ), the circumferential angle corresponding to the first fold line segment 1 (i.e., the second circumferential angle γ), and the horizontal deformation Δb and vertical deformation Δh of the cross section of the steel wire rope 200 when under pressure due to its elastic characteristics, the actual width of the first climbing boss 5 in the first fold line segment 1 (i.e., the first actual width B z1 ) and the actual height (i.e. the first actual height H z1 ). In this way, the influence of the elastic characteristics of the steel wire rope 200 can be eliminated, and the quantitative design of the first climbing boss 5 can be realized, so that when the double-folded drum 100 winds the steel wire rope 200, the steel wire rope 200 can stably climb from the first layer to the second layer via the first climbing boss 5, avoiding the effects of the steel wire rope 200 skipping, rope loosening or rope biting, thereby improving the stability of the steel wire rope 200 transmission system and extending the service life of the steel wire rope 200.

[0069] In the second embodiment, step S2 further includes:

[0070] Obtain the diameter of the steel wire rope 200 when it is assumed to be rigid, so as to obtain the first theoretical diameter d 1 ;

[0071] According to the first theoretical diameter d 1 , the first circumferential angle θ, and the second circumferential angle γ, calculate the first theoretical width b z1 , and the first theoretical height h z1 , and its calculation formula is:

[0072]

[0073] As described above, when the steel wire rope 200 is closely arranged on the bifold drum 100 and the cross section of the steel wire rope 200 is in a rigid characteristic, as the circumferential angle θ of the steel wire rope 200 on the bifold drum 100 changes, the lateral spacing between the penultimate turn of the first layer of the steel wire rope 200 on the return side 7 and the drum end plate 9 is the first theoretical width b z1 ; and the longitudinal distance between the wire rope 200 at the climbing section of the return side 7 and the bottom of the drum rope groove is the first theoretical height h z1 .

[0074] Also, see Figure 4 It should be noted that, in the process of analyzing the elastic characteristics of the cross section of the steel wire rope 200, only small displacement and small strain are considered, and it is assumed that each steel wire in the steel wire rope 200 is made of uniform and isotropic material.

[0075] A geometric model of a steel wire rope 200 of a certain length is established in a three-dimensional modeling software (such as Pro / E), and the geometric model of the steel wire rope 200 is imported into a finite element analysis software (such as ABAQUS) to establish a finite element numerical calculation model.

[0076] In finite element analysis software (such as ABAQUS), solid elements are selected to generate finite element meshes, and the friction coefficient between the steel wires is set according to the surface conditions of the steel wires.

[0077] Two upper and lower rigid pressure blocks are added to the model of the steel wire rope 200 subjected to axial tension. In order to ensure the stability of the structure, the pressure blocks are set to have only a single degree of freedom along the pressure direction.

[0078] In order to conveniently record the deformation of the steel wire rope 200, a reference point 1 is set at the center of the pressure block and a reference point 2 is set on the circumference of the steel wire rope 200 in the model to output the displacement of the pressure block and the deformation in two directions within the cross section of the steel wire rope 200. The actual width of the steel wire rope 200 when under pressure is defined as b' and the actual height as h', so that: Δb = b'-d 1 , Δh=d 1 -h'.

[0079] In the third embodiment, the first climbing boss 5 extends from the first folded line segment 1 to the first straight line segment 2, wherein the actual width of the first climbing boss 5 in the first straight line segment 2 is B. z2, and the actual height is H z2 ,satisfy:

[0080]

[0081] in, And θ=γ.

[0082] In this embodiment, in order to ensure that the steel wire rope 200 can be stably wound after jumping the layer, the actual width B of the first climbing boss 5 in the first straight line segment 2 is z2 and actual height H z2 Specifically, the actual width B of the first climbing boss 5 in the first straight line segment 2 is z2 and actual height H z2 , which is the same as the size of the first climbing boss 5 at the end of the first broken line segment 1, that is, B z2 and H z2 satisfy:

[0083]

[0084] See also Figure 5 In the fourth embodiment, the first climbing boss 5 extends from the first fold line segment 1, through the first straight line segment 2 to the second fold line segment 3, the end of the first fold line segment 1 close to the second straight line segment 4 is the first end, and the end of the second fold line segment 3 close to the first straight line segment 2 is the second end, and step S3 further includes:

[0085] Step S31: Obtain the circumferential angle α corresponding to the interval between the first end and the second end to obtain the third circumferential angle α, and obtain the theoretical width and theoretical height of the first climbing boss 5 in the second folding line segment 3 to obtain the second theoretical width b z3 and the second theoretical height h z3 ;

[0086] It should be noted that, since the first circumferential angle θ corresponding to the steel wire rope 200 at the first end is 0°, that is, in this embodiment, the first circumferential angle θ corresponding to the steel wire rope 200 at the second end is equal to α, and when the second fold line segment 3 is close to one end of the second straight line segment 4, the corresponding circumferential angle θ=(α+γ). Specifically, in this embodiment, the first fold line segment 1 and the second fold line segment 3 are located on opposite sides of the double fold line drum 100 in its circumferential direction, so that α is equal to 180°.

[0087] Step S32: According to the first circumferential angle θ, the second circumferential angle γ, the horizontal deformation Δb, the vertical deformation Δh, the third circumferential angle α, the second theoretical width b z3 , and the second theoretical height h z3 , calculate the actual width and actual height of the first climbing boss 5 in the second folding line segment 3 to obtain the second actual width Bz3 and the second actual height H z3 , and its calculation formula is:

[0088]

[0089] In this embodiment, the steel wire rope 200 does not perform layer climbing winding in the second fold line segment 3 on the return side 7, so the actual height of the first climbing boss 5 in this area remains unchanged. When the first fold line segment 1 and the second fold line segment 3 are located on opposite sides of the double fold line drum 100 in its circumferential direction, the second actual width B z3 and the second actual height H z3 satisfy:

[0090]

[0091] In the fifth embodiment, step S31 includes:

[0092] Obtain the diameter of the wire rope 200 when it is assumed to be rigid to obtain the second theoretical diameter d 2 ;

[0093] It should be noted that the first theoretical diameter d 1 and the second theoretical diameter d 2 Both are diameters when the cross section of the steel wire rope 200 is assumed to be rigid, and the values ​​of the two are equal.

[0094] According to the second theoretical diameter d 2 , the first circumferential angle θ, the second circumferential angle γ, and the third circumferential angle α, calculate the second theoretical width b z3 , and the second theoretical height h z3 , and its calculation formula is:

[0095]

[0096] In this embodiment, assuming that the steel wire rope 200 is rigid and closely arranged in the cross section, as the first circumferential angle θ of the steel wire rope 200 on the double-fold drum 100 changes, the lateral spacing between the first last circle of the steel wire rope 200 on the return side 7 and the adjacent drum end plate 9 is B. 2 , satisfying B 2 =B z3 ; and the steel wire rope 200 is not wound up in the second broken line segment 3 on the return side 7, and the height of the first climbing lug in this area remains unchanged.

[0097] Specifically, when the first fold line segment 1 and the second fold line segment 3 are located on opposite sides of the double fold line reel 100 in the circumferential direction, B z3 satisfy:

[0098] See also Figure 1 and Figure 6 In the sixth embodiment, the rope entry side 8 is provided with a second climbing boss 6, and the second climbing boss 6 is at least partially located on the first folding line segment 1. In this embodiment, the rope entry side 8 is further provided with a second climbing boss to achieve climbing winding of the wire rope 200 from the second layer to the third layer. Specifically, step S3 also includes:

[0099] Step S33: Obtain the theoretical height and theoretical width of the second climbing boss 6 in the first folding line segment 1 to obtain a third theoretical width b r1 and the third theoretical height h r1 ;

[0100] Similarly, the third theoretical width b r1 and the third theoretical height h r1 The cross section of the steel wire rope 200 is obtained when the cross section is rigid and closely arranged. At this time, the second layer of steel wire rope 200 in the first broken line segment 1 of the rope entry side 8 is arranged as follows: Figure 6 As shown, the geometric relationship between the wire rope 200 turns in this area shows that, as the first circumferential angle θ of the wire rope 200 on the drum changes, the lateral spacing between the penultimate turn of the wire rope 200 on the rope entry side 8 and the corresponding drum end plate 9 is B 3 , and the lateral spacing between the first layer of the first coil of the wire rope 200 on the rope entry side 8 and the corresponding drum end plate 9 is B 3 ′, satisfying B r1 =min(B 3 , B 3 '). At the same time, the longitudinal distance between the steel wire rope 200 of the climbing section of the 8th layer on the rope entry side and the bottom of the rope groove of the drum is H 3 , meet,H 3 =H r1 .

[0101] Step S34: According to the first circumferential angle θ, the second circumferential angle γ, the horizontal deformation Δb, the vertical deformation Δh, the third theoretical width b r1 , and the third theoretical height h r1 , calculate the actual width and actual height of the first climbing boss 5 in the first broken line segment 1 to obtain the third actual width B r1 and the third actual height H r1 , and its calculation formula is:

[0102]

[0103] In this embodiment, the actual width of the second climbing boss 6 in the first broken line segment 1 (i.e., the third actual width B r1) and the actual height (i.e. the third actual height H r1 In this way, the influence of the elastic characteristics of the steel wire rope 200 can be eliminated, and the quantitative design of the second climbing boss 6 can be realized, so that when the double-folded drum 100 winds the steel wire rope 200, the steel wire rope 200 can stably climb from the second layer to the third layer via the second climbing boss 6, avoiding the effects of the steel wire rope 200 skipping, rope loosening or rope biting, further improving the stability of the steel wire rope 200 transmission system and extending the service life of the steel wire rope 200.

[0104] In the seventh embodiment, step S33 includes:

[0105] Obtain the diameter of the wire rope 200 when it is assumed to be rigid, so as to obtain the third theoretical diameter d 3 ;

[0106] It should be noted that the first theoretical diameter d 1 , the second theoretical diameter d 2 , and the third theoretical diameter segment d 3 All are diameters when the cross section of the steel wire rope 200 is assumed to be rigid, and the values ​​of the three are equal.

[0107] According to the third theoretical diameter d 3 , the first circumferential angle θ, and the second circumferential angle γ, calculate the third theoretical width b r1 , and the third theoretical height h r1 , and its calculation formula is:

[0108]

[0109] In this embodiment, assuming that the steel wire rope 200 is rigid in the cross section and is closely arranged, as the first circumferential angle θ of the steel wire rope 200 on the drum changes, the lateral spacing B between the penultimate circle of the second layer of the steel wire rope 200 on the rope entry side 8 and the corresponding drum end plate 9 is 3 , and the distance B between the first layer of the first coil of the wire rope 200 on the rope entry side 8 and the corresponding drum end plate 9 3 'satisfy:

[0110] That is, Correspondingly, the longitudinal distance between the steel wire rope 200 of the 8-layer climbing section on the rope entry side and the bottom of the rope groove of the drum is H 3 satisfy:

[0111] That is,

[0112] In the eighth embodiment, the second climbing boss 6 extends from the second straight line segment 4 to the first broken line segment 1, wherein the actual width B of the second climbing boss 6 in the second straight line segment 4 isr2 , and actual height H r2 satisfy:

[0113]

[0114] in, And θ=0.

[0115] In this embodiment, the actual width B of the second climbing boss 6 in the second straight line segment 4 is r2 The actual height H r2 Remains constant, and its actual width B r2 and actual height H r2 The size of the second climbing boss 6 is the same as that of the end of the first fold line segment 1 close to the second straight line segment 4. Specifically, B r2 and H r2 for:

[0116]

[0117] See also Figure 7 In the ninth embodiment, the second climbing boss 6 extends from the second fold line segment 3, through the second straight line segment 4 to the first fold line segment 1, the end of the first fold line segment 1 close to the second straight line segment 4 is the first end, and the end of the second fold line segment 3 close to the first straight line segment 2 is the second end, and step S34 further includes:

[0118] Step S341: Obtain the circumferential angle α corresponding to the interval between the first end and the second end to obtain the third circumferential angle α, and obtain the theoretical width and theoretical height of the second climbing boss 6 in the second folding line segment 3 to obtain the fourth theoretical width b r3 And the fourth theoretical height h r3 ;

[0119] It should be noted that, since the first circumferential angle θ corresponding to the steel wire rope 200 at the first end is 0, that is, in this embodiment, the first circumferential angle θ corresponding to the steel wire rope 200 at the second end is equal to α, and when the second fold line segment 3 is close to one end of the second straight line segment 4, the corresponding circumferential angle θ=(α+γ). Specifically, in this embodiment, the first fold line segment 1 and the second fold line segment 3 are located on opposite sides of the double fold line drum 100 in its circumferential direction, so that α is equal to 180°.

[0120] Step S342: According to the first circumferential angle θ, the second circumferential angle γ, the horizontal deformation Δb, the vertical deformation Δh, the third circumferential angle α, the fourth theoretical width b r3 , and the fourth theoretical height h r3 , calculate the actual width and actual height of the second climbing boss 6 in the second folding line segment 3 to obtain the fourth actual width B r3 and the fourth actual height Hr3 , and its calculation formula is:

[0121]

[0122] In this embodiment, the steel wire rope 200 does not perform layer climbing winding at the second fold line segment 3 on the rope entry side 8, so the actual height of the second climbing boss 6 in this area remains unchanged. When the first fold line segment 1 and the second fold line segment 3 are located on opposite sides of the double fold line drum 100 in its circumferential direction, the second actual width B z3 and the second actual height H z3 satisfy:

[0123]

[0124] In the tenth embodiment, step S341 further includes:

[0125] Obtain the diameter of the steel wire rope 200 when it is assumed to be rigid, so as to obtain the fourth theoretical diameter d 4 ;

[0126] It should be noted that the first theoretical diameter d 1 , the second theoretical diameter d 2 , the third theoretical diameter section d 3 , and the fourth theoretical diameter are all diameters when the cross section of the wire rope 200 is assumed to be rigid, and the values ​​of the four are equal.

[0127] According to the fourth theoretical diameter d 4 , the first circumferential angle θ, and the second circumferential angle γ, calculate the fourth theoretical width b r3 , and the fourth theoretical height h r3 , and its calculation formula is:

[0128]

[0129] In this embodiment, assuming that the steel wire rope 200 is rigid and closely arranged in the cross section, as the first circumferential angle θ of the steel wire rope 200 on the double-fold drum 100 changes, the lateral spacing between the penultimate circle of the second layer of the steel wire rope 200 on the rope entry side 8 and the adjacent drum end plate 9 is B. 4 , satisfying B 4 =B r3 ; and the steel wire rope 200 does not perform layer climbing and winding in the second broken line segment 3 on the return side 7, and the height of the second climbing boss 6 in this area remains unchanged.

[0130] Specifically, when the first fold line segment 1 and the second fold line segment 3 are located on opposite sides of the double fold line reel 100 in the circumferential direction, B r3 satisfy:

[0131] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for designing a climbing boss of a double-fold line drum, wherein the double-fold line drum is provided with a first fold line segment, a first straight line segment, a second fold line segment and a second straight line segment connected in sequence along its circumference, and one side of the double-fold line drum in the axial direction is a folding side and the other side opposite thereto is a rope entry side, and the folding side is provided with a first climbing boss at least partially located in the first fold line segment, characterized in that: The climbing boss design method of the double-fold line drum comprises: Step S1: obtaining the circumferential angle of the steel wire rope on the double-fold line drum to obtain a first circumferential angle θ, and obtaining the circumferential angle corresponding to the first fold line segment to obtain a second circumferential angle γ; Step S2: Obtain the theoretical height and theoretical width of the first climbing boss within the first folding line segment to obtain a first theoretical width b z1 and the first theoretical height h z1 , and obtain the horizontal deformation Δb and vertical deformation Δh of the cross section of the wire rope when it is compressed in actual work; Step S3: According to the first circumferential angle θ, the second circumferential angle γ, the first theoretical width b z1 、The first theoretical height h z1 , the horizontal deformation Δb, and the vertical deformation Δh, calculate the actual width and actual height of the first climbing boss in the first fold line segment to obtain a first actual width B z1 and the first actual height H z1 , and its calculation formula is: When the steel wire rope is at one end of the first broken line segment close to the second straight line segment, the corresponding first circumferential angle θ is 0°.

2. The climbing boss design method of the double-fold line reel according to claim 1 is characterized in that: Step S2 also includes: Obtaining the diameter of the wire rope when it is assumed to be rigid, so as to obtain a first theoretical diameter d1; The first theoretical width b is calculated based on the first theoretical diameter d1, the first circumferential angle θ, and the second circumferential angle γ. z1 , and the first theoretical height h z1 , and its calculation formula is:

3. The climbing boss design method of the double-fold line reel according to claim 2 is characterized in that: The first climbing boss extends from the first folded line segment to the first straight line segment, wherein the actual width of the first climbing boss in the first straight line segment is B. z2 , and the actual height is H z2 ,satisfy: in, And θ=γ.

4. The method for designing a climbing boss of a double-folded drum according to claim 1, characterized in that: The first climbing boss extends from the first folded line segment, through the first straight line segment, to the second folded line segment, an end of the first folded line segment close to the second straight line segment is a first end, and an end of the second folded line segment close to the first straight line segment is a second end, and step S3 further includes: Step S31: Obtain the circumferential angle α corresponding to the interval segment between the first end and the second end to obtain a third circumferential angle α, and obtain the theoretical width and theoretical height of the first climbing boss in the second broken line segment to obtain a second theoretical width b z3 and the second theoretical height h z3 ; Step S32: according to the first circumferential angle θ, the second circumferential angle γ, the horizontal deformation Δb, the vertical deformation Δh, the third circumferential angle α, the second theoretical width b z3 , and the second theoretical height h z3 , calculate the actual width and actual height of the first climbing boss in the second broken line segment to obtain the second actual width B z3 and the second actual height H z3 , and its calculation formula is:

5. The method for designing a climbing boss of a double-folded drum according to claim 4, characterized in that: Step S31 includes: Obtain the diameter of the wire rope when it is assumed to be rigid to obtain a second theoretical diameter d2; The second theoretical width b is calculated based on the second theoretical diameter d2, the first circumferential angle θ, the second circumferential angle γ, and the third circumferential angle α. z3 , and the second theoretical height h z3 , and its calculation formula is:

6. The method for designing a climbing boss of a double-folded drum according to claim 1, characterized in that: The rope entry side is provided with a second climbing boss, and the second climbing boss is at least partially located at the first fold line segment, and step S3 further includes: Step S33: Obtain the theoretical height and theoretical width of the second climbing boss within the first fold line segment to obtain a third theoretical width b r1 and the third theoretical height h r1 ; Step S34: according to the first circumferential angle θ, the second circumferential angle γ, the horizontal deformation Δb, the vertical deformation Δh, the third theoretical width b r1 , and the third theoretical height h r1 , calculate the actual width and actual height of the first climbing boss in the first fold line segment to obtain a third actual width B r1 and the third actual height H r1 , and its calculation formula is:

7. The method for designing a climbing boss of a double-folded drum according to claim 6, characterized in that: Step S33 includes: Obtaining the diameter of the wire rope when it is assumed to be rigid, so as to obtain a third theoretical diameter d3; The third theoretical width b is calculated based on the third theoretical diameter d3, the first circumferential angle θ, and the second circumferential angle γ. r1 , and the third theoretical height h r1 , and its calculation formula is:

8. The method for designing a climbing boss of a double-folded drum according to claim 7, characterized in that: The second climbing boss extends from the second straight line segment to the first broken line segment, wherein the actual width B of the second climbing boss in the second straight line segment is r2 , and actual height H r2 satisfy: in, And θ=0°.

9. The method for designing a climbing boss of a double-folded drum according to claim 6, characterized in that: The second climbing boss extends from the second folded line segment, through the second straight line segment, to the first folded line segment, an end of the first folded line segment close to the second straight line segment is a first end, and an end of the second folded line segment close to the first straight line segment is a second end, and step S34 further includes: Step S341: Obtain the circumferential angle α corresponding to the interval segment between the first end and the second end to obtain a third circumferential angle α, and obtain the theoretical width and theoretical height of the second climbing boss in the second broken line segment to obtain a fourth theoretical width b r3 And the fourth theoretical height h r3 ; Step S342: According to the first circumferential angle θ, the second circumferential angle γ, the horizontal deformation Δb, the vertical deformation Δh, the third circumferential angle α, the fourth theoretical width b r3 , and the fourth theoretical height h r3 , calculate the actual width and actual height of the second climbing boss in the second broken line segment to obtain a fourth actual width B r3 and the fourth actual height H r3 , and its calculation formula is:

10. The method for designing a climbing boss of a double-folded drum according to claim 9, characterized in that: Step S341 also includes: Obtaining the diameter of the steel wire rope when it is assumed to be rigid, so as to obtain a fourth theoretical diameter d4; The fourth theoretical width b is calculated based on the fourth theoretical diameter d4, the first circumferential angle θ, and the second circumferential angle γ. r3 , and the fourth theoretical height h r3 , and its calculation formula is:

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