CN115231420B - Permanent magnet friction pad for friction type elevator - Google Patents
Permanent magnet friction pad for friction type elevator Download PDFInfo
- Publication number
- CN115231420B CN115231420B CN202210945019.8A CN202210945019A CN115231420B CN 115231420 B CN115231420 B CN 115231420B CN 202210945019 A CN202210945019 A CN 202210945019A CN 115231420 B CN115231420 B CN 115231420B
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- Prior art keywords
- friction
- pad
- steel wire
- elevator
- permanent magnet
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- 229910000831 Steel Inorganic materials 0.000 claims description 38
- 239000010959 steel Substances 0.000 claims description 38
- 230000033001 locomotion Effects 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims 4
- 238000009434 installation Methods 0.000 claims 1
- 230000005389 magnetism Effects 0.000 claims 1
- 230000003068 static effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/0065—Roping
- B66B11/008—Roping with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
The invention discloses a permanent magnet friction pad for a friction type elevator, which comprises a plurality of pad sections, wherein each pad section is an arc section, the plurality of pad sections are arranged in series and are annularly arranged on the outer circumference of a friction wheel of the elevator, and each pad section comprises the following components along the radial direction of the arc section: the upper structure is characterized in that a rope groove is formed in the upper surface of the upper structure, the rope groove extends along the circumferential direction of the circular arc section, the lower structure is connected with the upper structure, and the lower structure is a permanent magnet.
Description
Technical Field
The invention belongs to the technical field of friction type elevators, and particularly relates to a permanent magnet friction liner for a friction type elevator.
Background
The multi-rope friction type elevator utilizes static friction force between a friction liner and a steel wire rope to drive the steel wire rope to pull a lifting container to lift. The friction pad is arranged on the circumference of the friction wheel of the multi-rope friction type elevator, and the upper surface of the friction pad is provided with rope grooves. The coefficient of friction and the compressive strength of the friction lining are directly related to the working capacity and safety of the hoisting machine. When the friction coefficient is insufficient under severe working conditions, or under the acceleration and deceleration motion state of the friction lifting system, the sliding phenomenon easily occurs between the steel wire rope and the friction liner, and the safe operation of the lifting system is affected.
In addition, the existing multi-rope friction type elevator has limited application range and cannot be economically and effectively adapted to lifting of heavy-load shallow wells. This is due to the fact that when a heavy shallow well is lifted, the difference in static tension of the steel wire rope on both sides of the friction wheel is too large, and the steel wire rope is easy to slide on the friction wheel. Generally, this problem can be solved by means of heavy balancing ropes or weighting the lifting containers, but this can result in a bulky lifting system, which is costly and wasteful of energy. And the lifting capacity of the hoisting machine can be effectively increased by increasing the friction coefficient between the friction liner of the hoisting machine and the steel wire rope, so that the multi-rope friction hoisting machine can safely and efficiently run under the heavy-load shallow well lifting working condition. Therefore, developing a friction pad with a higher friction coefficient is necessary for safe operation of a multi-rope friction elevator in a vertical shaft, and is important for expanding the efficient application of the multi-rope friction elevator in heavy-duty shallow well lifting. The selection of the existing friction lining materials is subject to the transition from polyvinyl chloride and polyurethane to novel composite materials, and aims at pursuing higher friction coefficients from the materials per se, so that larger maximum static friction force is obtained. But development of new gasket materials with higher coefficients of friction has progressed slowly.
Chinese patent CN210480520U proposes that two extrusion blocks are arranged on two sides of the liner, so that the steel wire rope can be extruded, and the contact area between the steel wire rope of the elevator and the liner is increased to increase friction force, so that the elevator has better stability during operation and higher load lifting efficiency. However, the friction pad has a complex structure, large maintenance and repair amount and poor reliability.
Disclosure of Invention
In order to solve the above problems, the invention discloses a permanent magnet friction pad for a friction type elevator, which comprises a plurality of pad segments, wherein the pad segments are arc segments, the plurality of pad segments are arranged in series and are annularly arranged on the outer circumference of a friction wheel of the elevator, and each pad segment comprises:
the upper structure is provided with rope grooves on the upper surface, and the rope grooves extend along the circumferential direction of the arc sections;
the lower structure is connected with the upper structure and is a permanent magnet;
the pair of guiding devices are respectively arranged at the steel wire rope running-in point and the steel wire rope running-out point of the friction wheel, and the steel wire ropes outside the wrap angle pass through the corresponding guiding devices so as to overcome the separation of the permanent magnetic force and the friction wheel of the elevator.
Optionally, each guiding device comprises a bracket and a plurality of rows of guiding rollers, wherein each row of guiding rollers is fixed on a mandrel mounted on the bracket, the number of the rollers on each row of guiding rollers is the same as that of the steel wire ropes of the friction type elevator, the spacing between the adjacent guiding rollers is the same as that of the steel wire ropes, and the steel wire ropes sequentially pass through the corresponding guiding rollers of each row.
Optionally, the portion of the guide roller contacting the wire rope is arc-shaped, and the radius of curvature of the arc-shaped is 1.1 times the radius of the wire rope.
Alternatively, the pad segments are arranged in a plurality of rings in parallel in the axial direction and mounted on the outer circumference of the elevator friction wheel.
Alternatively, one side surface of the pad segment is an inclined surface gradually outwards from top to bottom, the other opposite side surface is a vertical plane, the inclined surface is contacted by the pressing block, the vertical plane is contacted by the fixing block, and the pad segment is mounted on the outer circumference of the friction wheel.
Alternatively, the pad segments are mounted in wedge grooves on the outer circumference of the friction wheel in an interference fit.
Optionally, the thickness of the substructure is 2/3 of the total thickness of the pad segments.
Optionally, the curvature of the lower structure is the same as the curvature of the outer circumference of the elevator friction wheel.
Optionally, the rope groove is a double rope groove.
The permanent magnet friction pad for the friction type elevator has the following beneficial effects:
(1) The permanent magnetic friction liner is adopted, the steel wire rope is guided by the guiding device to overcome the separation of the permanent magnetic force and the friction wheel of the hoisting machine, so that larger maximum static friction force (maximum friction force without slipping) can be obtained in the surrounding angle, the capacity and the operation safety of the hoisting system are improved, and the application range of the friction type hoisting machine is expanded to shallow well hoisting.
(2) The permanent magnet friction pad has simple structure, simple and convenient processing and manufacturing and low cost; the use is safe and reliable, the damage is not easy to occur, and the maintenance amount is small.
(3) Permanent magnetic friction gaskets can be manufactured by selecting permanent magnetic materials with different magnetic forces according to the requirements of a lifting system so as to obtain positive pressure and maximum static friction force required by design.
(4) When the abrasion loss required by the safety regulations is met and the abrasion loss is required to be replaced, only the upper structure of the permanent magnet friction pad is required to be replaced, so that the cost is reduced.
Drawings
FIG. 1 is a cross-sectional view of a permanent magnet friction pad according to an embodiment of the present invention;
FIG. 2 is a longitudinal cross-sectional view of a permanent magnet friction pad according to an embodiment of the present invention;
FIG. 3 is an elevation view of a permanent magnet friction pad of an embodiment of the present invention mounted on a hoist friction wheel;
FIG. 4 is a side view of a permanent magnet friction pad of an embodiment of the present invention mounted on a hoist friction wheel;
fig. 5 is an enlarged view of fig. 3 and fig. 4 at A, B, C;
FIG. 6 is a schematic view of a guiding device according to an embodiment of the invention;
fig. 7 is a schematic view of a guide roller according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The permanent magnet friction pad for a friction elevator of this embodiment includes a plurality of pad segments, fig. 1 is a cross-sectional view of the pad segments of this embodiment, and fig. 2 is a schematic longitudinal sectional view of the pad segments of this embodiment. As shown in fig. 1 and 2, the pad segment 1 of the present embodiment is a circular arc segment, and is formed by an upper structure 11 and a lower structure 12 along the radial direction of the circular arc segment, the upper surface of the upper structure 11 is provided with rope grooves 14, and the rope grooves 14 extend along the circumferential direction of the circular arc segment, and are preferably parallel double rope grooves for contacting with a steel wire rope. The lower structure 12 is a permanent magnet, and the upper structure of the pad segments is made of a common composite material, such as polyvinyl chloride, polyurethane rubber, and resin materials.
The curvature of the pad segment lower structure 12 is the same as the curvature of the outer circumference of the elevator sheave to facilitate attachment to the sheave outer circumference, and preferably the pad segment is curved in its entirety in the same manner as the curvature of the sheave 100 outer circumference. A plurality of pad segments 1 may be arranged in series and annularly around the outer circumference of the elevator sheave. A plurality of rings may be arranged side by side in the axial direction around the outer circumference of the elevator sheave as shown in fig. 3.
One side surface of the pad segment 1 is an inclined surface gradually outwards from top to bottom so as to be in contact with a pressing block 21, the pad segment 1 is mounted on the outer circumference of the friction wheel through the pressing block contact with the inclined surface, so that radial movement of the pad segment is limited, and the other opposite side surface is a vertical plane for being in contact with a fixed block 22 during mounting, and axial movement of the pad segment is limited through the fixed block 22. The connection of the pressure piece and the fixing piece to the friction wheel may be by means of, for example, bolts. It should be noted that the pressing block and the fixing block are common techniques for fixing the pad segments, and will not be described in detail herein. Moreover, the pad segments may also be mounted in a wedge-shaped groove on the outer circumference of the friction wheel in an interference fit.
The lower surface of the upper structure is tightly attached to the upper surface of the lower structure, and the upper structure and the lower structure can be integrally formed or assembled and connected together. Preferably, the upper and lower structures are assembled as pad segments, and only the upper structure of the pad segments need to be replaced when the pad segments reach the amount of wear required by safety regulations. The upper structure and the lower structure can be installed in the wedge-shaped groove on the outer circumference of the friction wheel in an interference connection mode, and the upper structure is detached to be replaced when the upper structure is required to be detached.
Preferably, the thickness of the understructure is about 2/3 of the total thickness of the pad segments.
Fig. 3 is a front view of the pad segments mounted on the friction wheel, and fig. 4 is a side view of the pad segments mounted on the friction wheel. Fig. 5 is an enlarged view of A, B, C in fig. 3 and 4, and the operation thereof will be described with reference to fig. 3 and 4. As shown in fig. 4, as the hoist sheave 100 rotates, when the wire rope 200 enters the wrap angle of the sheave (referring to the angle of the wire rope around the contact pad segment) from the running point, a pad segment on the upper side of the running point is attracted by the magnetic field of the permanent magnet, and the permanent magnet friction pad attracts the wire rope entering the rope groove. Under the action of the attraction force, the steel wire rope in the rope groove is attracted to the permanent magnet friction liner, the steel wire rope generates larger pressure on the permanent magnet friction liner, the pressure is the sum of the dead weight of the conventional steel wire rope and the attraction force of the end load and the permanent magnet friction liner to the steel wire rope, so that larger maximum static friction force (maximum friction force without slipping) can be obtained between the steel wire rope and the permanent magnet friction liner, and the capacity and the running stability of a lifting system are improved.
Further, a pair of guide devices 300 are further included, and at the steel wire rope running-in point and running-out point of the friction wheel, under the action of the permanent magnetic field of the pad segment, the steel wire rope 200 tends to be attracted to the pad segment away from the normal running direction within a small distance before running into the friction wheel and after running out of the friction wheel. Based on this, the guide device 300 is provided at which the wire rope 200 is in contact with the guide roller 32 of the guide device 300, and the guide device provides an external force to the wire rope to overcome the acting force of the permanent magnet on the wire rope, thereby ensuring that the wire rope runs in the normal running direction near the running-in point and the running-out point. Each guide 300 includes a bracket 30 and a plurality of rows of guide rollers mounted on the bracket 30. A pair of guide devices are respectively arranged at the running-in point and the running-out point of the steel wire rope on the friction wheel of the friction type elevator. As shown in fig. 6, the bracket 30 of the guide device may be welded with a channel steel and a steel plate, and fixedly installed on the side of the friction wheel by bolts. Each row of guide rollers is in the form of a mandrel 33 having a plurality of guide rollers 32 in series, each guide roller 32 being fixedly connected to the mandrel. Bearings 31 are arranged at two ends of the core shaft of each row of guide rollers and are arranged on the bracket 30.
The number of the rollers on each row of guide rollers is the same as that of the steel wire ropes of the friction type elevator, and is generally 4 or 6; the spacing between adjacent guide rollers is the same as the wire rope spacing. So that the wire rope can pass through the corresponding guide rollers of each row in turn. The guide roller 32 is in contact with the wire rope 200, and the guide roller 32 and the spindle 33 rotate on the bracket under the frictional force between the guide roller 32 and the wire rope 200.
Preferably, the number of guide roller rows of the guide device is 3.
Preferably, the guide roller 32 is of the same material as the upper structure of the pad section.
Each guide roller 32 is fixed on the mandrel 33, and the guide rollers 32 and the mandrel 33 rotate synchronously under the drive of the wire rope 200. As shown in fig. 7, the portion of the axial section of the guide roller 32 that contacts the wire rope 200 is circular arc-shaped to ensure that the roller 32 is in sufficient contact with the wire rope 200. On the premise of ensuring the strength, the diameter of the guide roller 32 should be as small as possible to be as close to the running-off point and the running-in point of the steel wire rope 200 at the friction wheel of the elevator as possible, so that the effect of the magnetic field of the permanent magnet on the steel wire rope is fully overcome, and the steel wire rope is ensured to run along the normal running direction.
Preferably, the radius of curvature of the arc portion of the surface of the guide roller 32 contacting the wire rope 200 is 1.1 times the radius of the lift wire rope.
Of course, the present invention is capable of other various embodiments and its several details are capable of modification in accordance with the present invention by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. The utility model provides a friction lining pad of permanent magnetism for friction elevator, its characterized in that includes a plurality of liner segmentation, the liner segmentation is the circular arc section, and a plurality of liner segmentation are used for the tandem arrangement to be the annular and install on the outer circumference of elevator friction wheel, and each liner segmentation includes along the radial of circular arc section:
the upper structure is provided with rope grooves on the upper surface, and the rope grooves extend along the circumferential direction of the arc sections;
the lower structure is connected with the upper structure and is a permanent magnet;
a pair of guiding devices respectively arranged at the steel wire rope running-in point and the steel wire rope running-out point of the friction wheel, wherein the steel wire ropes outside the surrounding angles pass through the corresponding guiding devices so as to overcome the separation of permanent magnetic force and the friction wheel of the elevator, each guiding device comprises a bracket and a plurality of rows of guiding rollers, each row of guiding rollers is fixed on a mandrel arranged on the bracket, the number of the rollers on each row of guiding rollers is the same as that of the steel wire ropes of the friction elevator, the spacing between the adjacent guiding rollers is the same as that between the steel wire ropes, the steel wire ropes sequentially pass through the corresponding guiding rollers of each row,
one side surface of the pad segment is an inclined surface gradually outwards from top to bottom, the pad segment is arranged on the outer circumference of the friction wheel through a pressing block contacting the inclined surface, so as to limit the radial movement of the pad segment, the other opposite side surface is a vertical plane, the pad segment is used for contacting a fixed block during installation, the axial movement of the pad segment is limited through the fixed block,
the pad segments are arranged in parallel in an axial direction and a plurality of rings are arranged on the outer circumference of the friction wheel of the elevator.
2. The permanent magnet friction lining for a friction elevator according to claim 1, wherein,
the contact part of the guide roller and the steel wire rope is arc-shaped, and the radius of curvature of the arc-shaped part is 1.1 times of the radius of the steel wire rope.
3. The permanent magnet friction lining for a friction elevator according to claim 1, wherein the thickness of the lower structure is 2/3 of the total thickness of the lining segments.
4. The permanent magnet friction pad for a friction type elevator according to claim 1, wherein the curvature of the lower structure is the same as the curvature of the outer circumference of the friction wheel of the elevator.
5. The permanent magnet friction lining for a friction elevator according to claim 1, wherein the rope grooves are double rope grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210945019.8A CN115231420B (en) | 2022-08-08 | 2022-08-08 | Permanent magnet friction pad for friction type elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210945019.8A CN115231420B (en) | 2022-08-08 | 2022-08-08 | Permanent magnet friction pad for friction type elevator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115231420A CN115231420A (en) | 2022-10-25 |
| CN115231420B true CN115231420B (en) | 2023-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210945019.8A Active CN115231420B (en) | 2022-08-08 | 2022-08-08 | Permanent magnet friction pad for friction type elevator |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE346727C (en) * | 1922-01-06 | Willy Horn Dipl Ing | Traction sheave for conveyor machines with electromagnetic retention of the conveyor rope | |
| US3177998A (en) * | 1962-01-19 | 1965-04-13 | Bull Sa Machines | Magnetic clutch with a magnetic lining |
| CN1639048A (en) * | 2002-03-08 | 2005-07-13 | 彼得·格拉布纳 | Friction wheel for high power friction pairings |
| CN2815996Y (en) * | 2005-06-13 | 2006-09-13 | 胡绳 | Self-adaptive friction force dragging mechanism |
| CN212799177U (en) * | 2020-07-03 | 2021-03-26 | 中实洛阳机械工程科技有限公司 | Friction liner pressing device of elevator |
| CN213387363U (en) * | 2020-08-21 | 2021-06-08 | 中实洛阳机械工程科技有限公司 | High-performance friction liner for kilometer deep well multi-rope hoist |
| CN113336100A (en) * | 2021-05-18 | 2021-09-03 | 武汉船用机械有限责任公司 | Steel wire rope groove-dropping prevention device |
-
2022
- 2022-08-08 CN CN202210945019.8A patent/CN115231420B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE346727C (en) * | 1922-01-06 | Willy Horn Dipl Ing | Traction sheave for conveyor machines with electromagnetic retention of the conveyor rope | |
| US3177998A (en) * | 1962-01-19 | 1965-04-13 | Bull Sa Machines | Magnetic clutch with a magnetic lining |
| CN1639048A (en) * | 2002-03-08 | 2005-07-13 | 彼得·格拉布纳 | Friction wheel for high power friction pairings |
| CN2815996Y (en) * | 2005-06-13 | 2006-09-13 | 胡绳 | Self-adaptive friction force dragging mechanism |
| CN212799177U (en) * | 2020-07-03 | 2021-03-26 | 中实洛阳机械工程科技有限公司 | Friction liner pressing device of elevator |
| CN213387363U (en) * | 2020-08-21 | 2021-06-08 | 中实洛阳机械工程科技有限公司 | High-performance friction liner for kilometer deep well multi-rope hoist |
| CN113336100A (en) * | 2021-05-18 | 2021-09-03 | 武汉船用机械有限责任公司 | Steel wire rope groove-dropping prevention device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115231420A (en) | 2022-10-25 |
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