Online replacement method and installation method of elevator pulley bushing and elevator pulley bushing

Abstract

The invention discloses an elevator pulley bushing online replacement method, an elevator pulley bushing mounting method and an elevator pulley bushing. The online replacement method for the lining of the elevator pulley comprises the steps that the elevator pulley provided with the lining comprising a plurality of sections capable of being assembled is rotated, so that at least one section to be replaced in the lining is rotated to an operation area, the section to be replaced is not jointed with an elevator rope arranged on the elevator pulley when in the operation area; the to-be-replaced section is detached from the elevator pulley, and a replacement section used for replacing the to-be-replaced section is installed on the elevator pulley; and repeating the above steps until all or part of the to-be-replaced sections in the bushing are replaced. The structure and installation operation of an existing elevator pulley bushing can be effectively improved, and particularly online replacement operation of the elevator pulley bushing can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of elevators, and in particular to an online replacement method and an installation method of an elevator pulley bushing and an elevator pulley bushing. Background Art

[0002] In an elevator system, a power device such as a traction machine is usually configured to provide power for the operation of the system. When an elevator pulley (such as a traction pulley) is driven to rotate by power, the power is transmitted to the elevator rope installed on it, causing the latter to start moving, and then driving the elevator car and / or counterweight connected to the elevator rope to move up and down along the elevator shaft.

[0003] Most elevator pulleys are equipped with bushings, which are generally of integral structure and can be installed on the elevator pulley in a variety of ways. Figure 1 The partial structure of an existing product is specifically shown in the figure, in which the bushing 1b can be mounted on the elevator pulley 1a by hot pressing, and they can be further fixed together by connecting members 1c such as bolts. The present application has found through research that the elevator pulley bushing in the prior art needs to be improved in terms of structural construction, installation and maintenance operations, performance, cost control, etc. Summary of the invention

[0004] In view of this, the present invention provides an elevator pulley bushing online replacement method, an installation method and an elevator pulley bushing to solve or at least alleviate one or more of the above-mentioned problems and other problems existing in the prior art.

[0005] First, according to one aspect of the present invention, a method for online replacement of an elevator pulley bushing is provided, comprising the steps of:

[0006] A. rotating an elevator pulley equipped with a bushing comprising a plurality of assembleable segments so that at least one segment to be replaced in the bushing is rotated to an operating area, wherein the segment to be replaced does not engage with an elevator rope installed on the elevator pulley when in the operating area;

[0007] B. removing the segment to be replaced from the elevator pulley and installing a replacement segment for replacing the segment to be replaced onto the elevator pulley; and

[0008] C. Repeat steps A and B until all or part of the section to be replaced in the bushing is replaced.

[0009] In the online replacement method of the elevator pulley bushing according to the present invention, optionally, the section to be replaced is installed in the grooves arranged along the circumferential direction on the elevator pulley, and has an extension portion extending radially outward beyond the groove. In step B, a force is applied to the extension portion so that the section to be replaced is disengaged from the groove, so as to remove the section to be replaced from the elevator pulley.

[0010] In the online replacement method of the elevator pulley bushing according to the present invention, optionally, in step B, the replacement section is installed in a groove arranged along the circumferential direction on the elevator pulley, wherein the first end of the replacement section is pressed against one end of the groove, and the second end of the replacement section opposite to the first end is pressed against the other end of the groove, so that after the replacement section is installed in place, the first end and the second end are respectively subjected to a first force and a second force, wherein the first force is parallel to the radial direction of the elevator pulley, and the second force forms an angle with the radial direction of the elevator pulley.

[0011] In the elevator pulley bushing online replacement method according to the present invention, optionally, the steps are further included:

[0012] Before step A or step B, a fastening component is removed from the bushing, wherein the fastening component is configured to provide a force in a radial direction of the elevator pulley so that the bushing is fastened in place on the elevator pulley; and

[0013] After step C, the fastening member is mounted on the bushing after the segment replacement to fasten the bushing in place on the elevator sheave.

[0014] In the elevator sheave bushing online replacement method according to the present invention, optionally, the fastening component is installed in a fitting portion of the bushing, the fitting portion being arranged on top of the plurality of assemblable sections along the circumference of the bushing.

[0015] In the elevator sheave bushing online replacement method according to the present invention, optionally, the fitting portion is configured in a groove shape, and the fastening member includes a metal belt.

[0016] In the online replacement method of the elevator pulley bushing according to the present invention, optionally, the operating area is located at the lower part of the elevator pulley, and / or the joint between two adjacent sections of the bushing is configured in a step shape, an arc shape or an oblique line shape, and the angle formed between the oblique line and the longitudinal section of the elevator pulley is less than 90° and not less than 10°.

[0017] Secondly, according to another aspect of the present invention, the present invention also provides an elevator pulley bushing installation method, comprising the steps of:

[0018] providing an elevator sheave and a bushing, the bushing comprising a plurality of assemblable sections; and

[0019] The plurality of assemblable segments are mounted on the elevator pulley along the circumference of the elevator pulley so that they form a bushing located on the elevator pulley after being assembled, and at least one of the segments is arranged to be placed in an operating area after rotating the elevator pulley, and the at least one segment does not engage with the elevator rope installed on the elevator pulley when being in the operating area.

[0020] In the elevator pulley bushing installation method according to the present invention, optionally, the segment is installed in the grooves arranged along the circumferential direction on the elevator pulley, and has an extension portion extending radially outward beyond the groove along the elevator pulley, and the segment can be disengaged from the groove and removed from the elevator pulley by applying a force to the extension portion.

[0021] In the elevator pulley bushing installation method according to the present invention, optionally, the first end of the segment is pressed against one end of a groove arranged along the circumferential direction on the elevator pulley, and the second end of the segment opposite to the first end is pressed against the other end of the groove, so that after the segment is installed in place, the first end and the second end are respectively subjected to a first force and a second force, wherein the first force is parallel to the radial direction of the elevator pulley, and the second force forms an angle with the radial direction of the elevator pulley.

[0022] In the elevator pulley bushing installation method according to the present invention, optionally, the steps are further included:

[0023] After the multiple assemblable segments are installed in the grooves arranged circumferentially on the elevator pulley, a fastening component is installed on the bushing formed after the installation assembly to provide a force along the radial direction of the elevator pulley so that the bushing is fastened in place on the elevator pulley.

[0024] In the elevator sheave bushing installation method according to the present invention, optionally, the fastening component is installed in a fitting portion of the bushing, the fitting portion being provided at the top of the plurality of assemblable sections along the circumference of the bushing.

[0025] In the elevator sheave bushing installation method according to the present invention, optionally, the fitting portion is configured in a groove shape, and the fastening member includes a metal belt.

[0026] In the elevator pulley bushing installation method according to the present invention, optionally, the operating area is located at the lower part of the elevator pulley, and / or the joint between two adjacent sections of the bushing is configured in a step shape, an arc shape or an oblique line shape, and the angle formed between the oblique line and the longitudinal section of the elevator pulley is less than 90° and not less than 10°.

[0027] In addition, according to another aspect of the present invention, an elevator pulley bushing is provided, which includes a plurality of assembleable sections, which are configured to be installed and assembled on an elevator pulley to form a bushing for an elevator pulley, and at least one section is arranged to be placed in an operating area after rotating the elevator pulley, and the at least one section does not engage with an elevator rope installed on the elevator pulley when in the operating area.

[0028] In the bushing for an elevator pulley according to the present invention, optionally, the segment is configured to be installed in grooves arranged circumferentially on the elevator pulley, and has an extension portion extending radially outwardly beyond the groove in the elevator pulley, so that the segment is disengaged from the groove by applying a force to the extension portion, thereby removing the segment from the elevator pulley.

[0029] In the bushing for an elevator pulley according to the present invention, optionally, the segment is configured to be installed in a groove arranged circumferentially on the elevator pulley, and has a first end and a second end opposite to each other, the first end is configured to be operated to abut against one end of the groove during installation, and the second end is configured to be operated to press against the other end of the groove during installation, so that after the segment is installed in place, the first end and the second end are respectively subjected to a first force and a second force, wherein the first force is parallel to the radial direction of the elevator pulley, and the second force forms an angle with the radial direction of the elevator pulley.

[0030] In the bushing for an elevator pulley according to the present invention, optionally, an assembly portion is provided on the section for fastening the assembled elevator pulley bushing in place on the elevator pulley by installing a fastening component in the assembly portion and providing a force along the radial direction of the elevator pulley.

[0031] In the bushing for an elevator sheave according to the present invention, optionally, the fitting portion is provided on top of the plurality of assemblable sections along the circumference of the bushing, and the fitting portion is configured in a groove shape, and the fastening member comprises a metal belt.

[0032] In the bushing for an elevator pulley according to the present invention, optionally, the operating area is located at the lower part of the elevator pulley, and / or the joint between two adjacent sections of the elevator pulley bushing is configured in a step shape, an arc shape or an oblique line shape, and the angle formed between the oblique line and the longitudinal section of the elevator pulley is less than 90° and not less than 10°.

[0033] The scheme of the present invention can effectively improve the structure and installation operation of the elevator pulley bushing, and can especially realize the online replacement operation of the elevator pulley bushing, thereby making the installation and maintenance process simpler, more efficient, and time-saving and labor-saving. Compared with the prior art, the application of the present invention can save up to 90% of the elevator pulley bushing assembly time, can significantly reduce the workload of on-site personnel, and promote cost reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. However, it should be noted that these drawings are designed for explanatory purposes only and are only intended to conceptually illustrate the structural configurations described herein, and are not necessarily drawn to scale.

[0035] Figure 1 The present invention is a partial side sectional structural schematic diagram of an existing elevator pulley equipped with a bushing.

[0036] Figure 2 The present invention is a schematic diagram of a three-dimensional structure of an elevator pulley example equipped with an elevator pulley bushing embodiment according to the present invention.

[0037] Figure 3 yes Figure 2 Schematic diagram of the exploded structure of the example.

[0038] Figure 4 Shows the Figure 2 A schematic diagram of the partial side section structure after a bushing segment in the example is installed in the groove of the elevator pulley example.

[0039] Figure 5 The following are schematic top views of the structures of four different embodiments of the elevator pulley bushing according to the present invention after being installed on the elevator pulley.

[0040] Figure 6 The figure is a process flow diagram of an embodiment of an elevator pulley bushing installation method according to the present invention.

[0041] Figure 7 Shows Figure 6 The operating conditions of the elevator sheave bushing installation method embodiment are shown.

[0042] Figure 8The present invention is a schematic diagram of a processing flow of an elevator pulley bushing replacement method embodiment according to the present invention.

[0043] Fig. 9 Shows Figure 8 The operating conditions of an embodiment of an online replacement method for elevator sheave bushings are shown. DETAILED DESCRIPTION

[0044] First of all, it should be noted that the steps, structures, features and advantages of the elevator pulley bushing online replacement method, installation method and elevator pulley bushing according to the present invention will be described below by way of example, but all descriptions should not be used to form any limitation on the present invention. In this article, the technical terms "first", "second" and the like are only used for distinguishing purposes and are not intended to indicate their order and relative importance, and the technical term "connection" includes connection achieved in a direct or indirect manner.

[0045] In addition, for any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the drawings, the present invention still allows any combination or deletion between these technical features (or their equivalents) without any technical obstacles, so that more embodiments according to the present invention are also within the scope of the present disclosure. In order to simplify the drawings, the same or similar parts and features may be marked in only one or several places in the same drawing.

[0046] refer to Figures 2 to 4 , through these figures, an elevator pulley bushing embodiment according to the present invention is exemplarily shown. In this embodiment, the bushing 20 is configured to include a plurality of sections 21, which can be Figure 2 and Figure 3 As shown in the figure, the sleeve is assembled and arranged on the elevator pulley 10, for example, installed in the groove 13 arranged along the circumference of the elevator pulley 10, so as to form a bushing for the elevator pulley after the combined installation. After the elevator rope 40 is wound and arranged on the bushing, the bushing can play a positive role in reducing pulley wear, reducing vibration and noise, preventing corrosion, facilitating equipment maintenance, etc. during use.

[0047] Generally speaking, the elevator pulley 10 can be made of any suitable material such as cast iron, steel, etc., and the bushing 20 can be made of any suitable material such as soft metal, rubber, nylon, non-metallic polymer, etc. The elevator rope 40 is also often referred to as an elevator steel rope, an elevator belt, a steel belt, or a lifting belt in some applications. It can be optionally configured with multiple strands of ropes according to specific applications. When the elevator rope 40 is installed on the elevator pulley 10 and the bushing 20, each strand of the rope can be placed in a corresponding recess 27, for example, provided on the section 21, so as to form a stable positioning to improve the running stability and safety reliability.

[0048] exist Figure 2 and Figure 3 In the embodiment of the present invention, the bushing 20 is shown to have six sections 21 by way of example only. It should be noted that these sections may have the same or different structural configurations in terms of circumferential length, edge profile, material and color selection. For example, the joint 22 of two adjacent sections 21 of the bushing 20 after assembly may be configured into any suitable shape as required, for example, Figure 5 In the figure, the joint configurations such as oblique line shape, step shape, arc shape, etc. are shown respectively. Figure 5 (a) and Figure 5 (b) also shows that such an inclined line can have different inclination directions relative to the axis of the elevator pulley 10. For example, as an optional situation, the inclined line can be set to form an angle β with the longitudinal section of the elevator pulley 10 in the range of greater than or equal to 10° and less than 90°. In the case where the joint 22 between two adjacent sections 21 has a joint configuration that is not parallel to the axis of the elevator pulley 10, this will cause the elevator rope 40 to form a contact time difference with different joint parts, thereby effectively reducing or avoiding the adverse effects such as vibration and noise that may be caused by the elevator rope 40 when contacting the joint 22.

[0049] It should be understood that the present invention allows for flexible configuration according to actual application requirements with respect to the specific number of blocks of the bushing 20, the configuration of individual blocks, the matching settings between blocks, etc., without any restrictions thereon.

[0050] Continue to refer Figure 4, the figure specifically illustrates the general situation of installing a segment 21 of the bushing 20 into the groove 13 of the elevator pulley 10. The segment 21 has a first end 23 and a second end 24 opposite to each other. During installation, the first end 23 of the segment 21 can be operated so that it first abuts against the end 11 of the groove 13, and then the second end 24 of the segment 21 is pressed against the other end 12 of the groove 13, so that the segment 21 is installed in place in the groove 13. After installation, the first end 23 and the second end 24 of the segment 21 can be subjected to the force F1 and the force F2 applied to them from the elevator pulley 10, respectively, wherein the force F1 is parallel to the radial direction of the elevator pulley 10 and is conducive to fixing the first end 23 at the current position, and the force F2 forms an angle (for example, not more than 30° or other suitable angle values) with the radial direction of the elevator pulley 10, so that a self-locking force such as a wedge can be formed to urge the second end 24 to remain in the current installation position. This is very helpful to firmly and reliably fix the section 21 in the expected installation position of the groove 13 .

[0051] In addition, Figure 4 Some structural details that can be optionally adopted in section 21 are also explained in the form of a partially enlarged view.

[0052] For example, in one or some embodiments, an extension portion 25 may be optionally provided on the segment 21, and the extension portion 25 is configured to extend outwardly along the radial direction of the elevator pulley 10 and beyond the groove 13, and the segment 21 may be separated from the groove 13 by applying force to the extension portion 25. More specifically, the second end 24 of the segment 21 may be separated from the position originally located at the end 12 of the groove 13 after being subjected to force, and then the first end 23 may be separated from the position originally located at the end 11 of the groove 13, so that the segment 21 may be very conveniently removed from the groove 13 of the elevator pulley 10.

[0053] For another example, in one or some embodiments, an assembly portion 26 may be optionally provided on the segment 21, so as to install the fastening component 30 in the assembly portion 26, and the fastening component 30 is used to apply a force F3 toward the segment 21 along the radial direction of the elevator pulley 10, so that the assembled bushing 20 can be more firmly maintained in the current position, which will help the elevator system to run more smoothly and reliably. Figure 4It is shown that the assembly portion 26 can be optionally configured in the shape of a groove, for example, such a groove can be set at the top of these sections 21 along the circumferential direction of the bushing 20, and the fastening component 30 can be selected to be in the form of a metal belt (such as a stainless steel belt, etc.), so that the fastening component 30 can be installed in the groove quite conveniently and reliably and apply a fastening force to the bushing 20. The specific size, shape and structure of the above-mentioned groove and metal belt can be designed as needed, for example, the metal belt can be configured to have a width range of 10-19 mm, a thickness range of 0.2-0.8 mm, etc. It should be pointed out that in other embodiments, the assembly portion 26 and the fastening component 30 can adopt other feasible solutions, for example, they can be configured as matching mounting holes and connecting parts (such as bolts, screws, etc.) and the like.

[0054] According to the solution of the present invention, when constructing the segments 21 of the elevator pulley bushing, one or more of the segments 21 can be configured so that after all the segments 21 are assembled on the elevator pulley 10, one or more of the segments 21 in the bushing can be rotated to reach the operating area Z by rotating the elevator pulley 10 (see Fig. 9 , the operation area Z is generally located at the lower part of the elevator pulley 10). Since the section 21 in the operation area Z is not engaged with the elevator rope 40 installed on the elevator pulley 10 at this time, the present invention advantageously allows the installation or removal of the above-mentioned one or more sections 21 directly in the operation area Z in an online state without removing the elevator rope 40 from the elevator pulley 10, thereby greatly simplifying the workload and cost investment in the assembly and maintenance of the elevator pulley bushing, and the operation process is quite time-saving and labor-saving. Regarding the specific size and position of the operation area Z, this is related to the specific structure of the elevator pulley (such as the wrap angle, etc.) and the contact position of the elevator rope on the elevator pulley and the bushing along the circumferential direction. By correspondingly designing one, two or more of the sections used to assemble the bushing, it will be allowed to disassemble, replace, etc. in the operation area Z without interfering with the elevator rope.

[0055] Combined with reference Figure 6 and Figure 7 , which exemplarily shows the basic situation of the elevator pulley bushing installation method according to the present invention, Figure 6 The general process flow of an elevator sheave bushing installation method embodiment is shown. Figure 7 Shows Figure 6 The specific operation scenario of the illustrated embodiment.

[0056] like Figure 6 As shown, in this given elevator pulley bushing installation method embodiment, the following steps may be included:

[0057] First, in step S11 , an elevator sheave and a bushing according to the present invention having a plurality of assemblable sections may be provided.

[0058] Next, in step S12, the above-mentioned segment can be installed on the elevator pulley, for example, in a groove arranged along the circumference of the elevator pulley. Figure 7 (a) and (b) schematically show a specific operation example, that is, how to install a segment 21 into the groove 13 position of the elevator pulley 10, wherein during installation, the segment 21 can be installed in place by applying a force F. For the specific structure of the segment and the force condition after installation, please refer to the above description. After the segments constituting the bushing are installed and assembled on the elevator pulley, the desired elevator pulley bushing will be formed. As mentioned above, according to the design concept of the present invention, one or more segments used to assemble the bushing can be arranged to be placed in the operating area Z after the elevator pulley is rotated. At this time, since the segment or segments in the operating area Z do not form an engagement with the elevator rope 40 on the elevator pulley 10, any possible operation such as installation and disassembly is allowed to be very conveniently performed in the operating area Z.

[0059] As an alternative, after these segments as bushing assembly components are individually installed in place in the grooves of the elevator sheave and form the elevator sheave bushing, this Figure 7 (c) is shown accordingly, and can also be Figure 7 As shown in (d), an optional fastening component (such as a metal belt, a connector, etc.) is installed on the bushing that has been assembled at this time, thereby applying a force toward the bushing along the radial direction of the elevator pulley, which is conducive to fixing the bushing on the elevator pulley more firmly. This is of positive significance for ensuring that the elevator rope subsequently installed on the elevator pulley and the bushing can move reliably and ensuring the safe operation of the elevator system.

[0060] The elevator pulley bushing installation method according to the present invention can make the bushing installation and maintenance process quite simple and efficient, whether it is operated in a manufacturing plant or at a construction site, and it is very time-saving and labor-saving. According to the comparative test with the technical solutions commonly used in the prior art, the application of the elevator pulley bushing installation method can save no less than 70% of the working hours compared with them, which is very efficient, time-saving and cost-saving. The overall advantages of the solution of the present invention are very obvious.

[0061] Continue to refer to Figure 8 and Fig. 9 , among which Figure 8 FIG. 1 shows a general process flow of an embodiment of a method for replacing an elevator sheave bushing according to the present invention. Fig. 9 It is shown in Figure 8The specific operation scenario of the illustrated embodiment.

[0062] like Figure 8 As shown, in this elevator pulley bushing online replacement method embodiment, it can include the following steps:

[0063] In step S21, the elevator pulley equipped with the bushing according to the present invention can be rotated, for example, along Fig. 9 The bushing is rotated in the direction indicated by the middle arrow R (or the opposite direction) so as to place one or more sections to be replaced in the bushing in the operating area Z for replacement operation. It has been described in the foregoing that one or more sections for which the above-mentioned replacement operation can be innovatively provided in the bushing according to the present invention, and when placed in the operating area Z, they will not form engagement with the elevator rope installed on the elevator pulley, thereby allowing the replacement and installation operations of this or these replaceable sections in the operating area Z.

[0064] In step S22, the above-mentioned section to be replaced is removed from the elevator pulley, and then the replacement section for replacing it is installed on the elevator pulley, so that the block replacement operation can be completed online, without the need to first remove the elevator rope from the elevator pulley and the bushing, and then perform the bushing replacement operation, and after the replacement is completed, re-install the elevator rope on the elevator pulley and the bushing, etc., which are tedious and laborious operations as in the prior art.

[0065] For a clearer understanding, Fig. 9 (b) exemplarily shows that in the operation area Z, a section 21 to be replaced is removed from the elevator pulley 10, and then a replacement section 21' for replacing the removed section 21 is installed on the elevator pulley 10, thereby completing the replacement operation of the above-mentioned section 21 to be replaced.

[0066] In step S23, the above steps S21 and S22 are repeated - for example, Fig. 9 (c) exemplarily shows the situation that another section 21 to be replaced is also removed from the elevator pulley 10 for replacement in the operation area Z, until the section to be replaced in the original bushing is completely replaced. It should be understood that in some cases, only a part of the section in the bushing (for example, there are problems such as damage and cracks) may need to be replaced, and in other cases, the original bushing may need to be replaced entirely, and the present elevator pulley bushing online replacement method is fully applicable to this.

[0067] In actual application, optional steps can be set for the online replacement method of the elevator pulley bushing according to the needs. For example, in one or some embodiments, before executing the above-mentioned step S21 or step S22, when the elevator pulley and bushing are equipped with the fastening components discussed above (such as metal belts, connectors, etc.), the fastening components can be removed from the bushing first; then, after completing step S23, the above-mentioned fastening components can be reinstalled on the bushing that has been replaced and installed, so as to be used to fasten the bushing in place on the elevator pulley. Regarding the above operation process, it has been described in detail. Fig. 9 (a) Fig. 9 (e) respectively give exemplary explanations.

[0068] It is also necessary to point out that the online replacement method of the elevator pulley bushing according to the present invention is particularly suitable for on-site construction operations. It changes the complicated, time-consuming and labor-intensive operation of disassembling and assembling the elevator rope when replacing the original elevator pulley bushing in the prior art, and greatly reduces the workload and cost investment of the replacement and installation process. According to the comparative test with the technical solutions commonly used in the prior art, the application of the online replacement method of the elevator pulley bushing can significantly save not less than 90% of the working hours, and the outstanding effects and technical advantages brought about by this are quite obvious.

[0069] Those skilled in the art can understand that the foregoing text has described in detail the technical contents such as the segments of the bushing, the fastening parts, the elevator pulley and the grooves that can be set thereon, various forces, etc. Therefore, those skilled in the art can directly refer to the specific instructions and contents of the aforementioned corresponding parts, and can choose to set the above features separately or in combination according to application needs, so as to form more possible solutions for the elevator pulley bushing installation method and the elevator pulley bushing online replacement method according to the present invention, so they will not be repeated here.

[0070] The above only illustrates in detail the elevator pulley bushing online replacement method, installation method and elevator pulley bushing according to the present invention by way of example. These examples are only used to illustrate the principle and implementation method of the present invention, but not to limit the present invention. Without departing from the spirit and scope of the present invention, those skilled in the art can also make various modifications and improvements. Therefore, all equivalent technical solutions should belong to the scope of the present invention and be defined by the claims of the present invention.

Claims

1. An online replacement method for an elevator pulley bushing, characterized in that: Includes steps: A. rotating an elevator pulley equipped with a bushing comprising a plurality of assembleable segments so that at least one segment to be replaced in the bushing is rotated to an operating area, wherein the segment to be replaced does not engage with an elevator rope installed on the elevator pulley when in the operating area; B. removing the segment to be replaced from the elevator pulley and installing a replacement segment for replacing the segment to be replaced onto the elevator pulley; and C. Repeat steps A and B until all or part of the section to be replaced in the bushing is replaced.

2. The method for online replacement of elevator sheave bushings according to claim 1, wherein: The segment to be replaced is installed in a groove arranged circumferentially on the elevator pulley, and has an extension portion extending radially outward beyond the groove. In step B, a force is applied to the extension portion to cause the segment to be replaced to be disengaged from the groove, so as to remove the segment to be replaced from the elevator pulley.

3. The method for online replacement of elevator sheave bushings according to claim 1, wherein: In step B, the replacement segment is installed in a groove arranged along the circumferential direction on the elevator pulley, wherein the first end of the replacement segment is pressed against one end of the groove, and the second end of the replacement segment opposite to the first end is pressed against the other end of the groove, so that after the replacement segment is installed in place, the first end and the second end are respectively subjected to a first force and a second force, wherein the first force is parallel to the radial direction of the elevator pulley, and the second force forms an angle with the radial direction of the elevator pulley.

4. The method for online replacement of elevator sheave bushings according to claim 1, wherein: Also includes the steps: Before step A or step B, a fastening component is removed from the bushing, wherein the fastening component is configured to provide a force in a radial direction of the elevator pulley so that the bushing is fastened in place on the elevator pulley; as well as After step C, the fastening member is mounted on the bushing after the segment replacement to fasten the bushing in place on the elevator sheave.

5. The method for online replacement of elevator sheave bushings according to claim 4, wherein: The fastening member is installed in a fitting portion of the bushing, the fitting portion being provided at the top of the plurality of assemblable sections along the circumferential direction of the bushing.

6. The method for online replacement of elevator sheave bushings according to claim 5, wherein: The fitting portion is configured in a groove shape, and the fastening member includes a metal band.

7. The method for online replacement of elevator sheave bushings according to claim 1, wherein: The operating area is located at the lower part of the elevator pulley, and / or the joint between two adjacent sections of the bushing is configured in a step shape, an arc shape or an oblique line shape, and the angle formed between the oblique line and the longitudinal section of the elevator pulley is less than 90° and not less than 10°.

8. A method for installing an elevator pulley bushing, characterized in that: Includes steps: providing an elevator sheave and a bushing, the bushing comprising a plurality of assemblable sections; and The plurality of assemblable segments are mounted on the elevator pulley along the circumference of the elevator pulley so that they form a bushing located on the elevator pulley after being assembled, and at least one of the segments is arranged to be placed in an operating area after rotating the elevator pulley, and the at least one segment does not engage with the elevator rope installed on the elevator pulley when being in the operating area.

9. The elevator sheave bushing installation method according to claim 8, wherein: The segment is installed in the grooves arranged along the circumferential direction on the elevator pulley, and has an extension portion extending radially outwardly beyond the groove in the elevator pulley. By applying a force to the extension portion, the segment can be disengaged from the groove and removed from the elevator pulley.

10. The elevator sheave bushing installation method according to claim 8, wherein: The first end of the segment is pressed against one end of a groove arranged circumferentially on the elevator pulley, and the second end of the segment opposite to the first end is pressed against the other end of the groove, so that after the segment is installed in place, the first end and the second end are respectively subjected to a first force and a second force, wherein the first force is parallel to the radial direction of the elevator pulley, and the second force forms an angle with the radial direction of the elevator pulley.

11. The elevator sheave bushing installation method according to claim 8, wherein: Also includes the steps: After the multiple assemblable segments are installed in the grooves arranged circumferentially on the elevator pulley, a fastening component is installed on the bushing formed after the installation assembly to provide a force along the radial direction of the elevator pulley so that the bushing is fastened in place on the elevator pulley.

12. The elevator sheave bushing installation method according to claim 11, wherein: The fastening member is installed in a fitting portion of the bushing, the fitting portion being provided at the top of the plurality of assemblable sections along the circumferential direction of the bushing.

13. The elevator sheave bushing installation method according to claim 12, wherein: The fitting portion is configured in a groove shape, and the fastening member includes a metal band.

14. The elevator sheave bushing installation method according to claim 8, wherein: The operating area is located at the lower part of the elevator pulley, and / or the joint between two adjacent sections of the bushing is configured in a step shape, an arc shape or an oblique line shape, and the angle formed between the oblique line and the longitudinal section of the elevator pulley is less than 90° and not less than 10°.

15. An elevator pulley bushing, characterized in that: The elevator pulley bushing comprises a plurality of assembleable segments configured to be mounted and assembled onto an elevator pulley to form a bushing for the elevator pulley, and wherein at least one segment is arranged to be placed in an operating area after rotating the elevator pulley, and the at least one segment does not engage with an elevator rope mounted on the elevator pulley when in the operating area.

16. The elevator sheave bushing of claim 15, wherein: The segment is configured to be installed in grooves arranged circumferentially on the elevator pulley, and has an extension portion extending radially outwardly beyond the groove in the elevator pulley, so as to disengage the segment from the groove by applying a force to the extension portion, thereby removing the segment from the elevator pulley.

17. The elevator sheave bushing of claim 15, wherein: The segment is configured to be installed in a groove arranged circumferentially on the elevator pulley, and has a first end and a second end opposite to each other, the first end being configured to be operated to abut against one end of the groove during installation, and the second end being configured to be operated to press against the other end of the groove during installation, so that after the segment is installed in place, the first end and the second end are respectively subjected to a first force and a second force, wherein the first force is parallel to the radial direction of the elevator pulley, and the second force forms an angle with the radial direction of the elevator pulley.

18. The elevator sheave bushing of claim 15, wherein: The segment is provided with an assembly portion for fastening the assembled elevator pulley bushing in place on the elevator pulley by installing a fastening component in the assembly portion and providing a force along the radial direction of the elevator pulley.

19. The elevator sheave bushing of claim 18, wherein: The fitting portion is disposed on top of the plurality of assemblable sections along a circumferential direction of the bushing, and the fitting portion is configured in a groove shape, and the fastening member includes a metal band.

20. The elevator sheave bushing of claim 15, wherein: The operating area is located at the lower part of the elevator pulley, and / or the joint between two adjacent sections of the elevator pulley bushing is configured in a step shape, an arc shape or an oblique line shape, and the angle formed between the oblique line and the longitudinal section of the elevator pulley is less than 90° and not less than 10°.

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