Elevator system with compensation chain having variable density
By designing compensation cables with gradually changing segment density in the elevator system, the torque and pressure problems caused by compensation chains of different density are solved, and the stable operation and ride comfort of the elevator system are achieved.
Patent Information
- Application Number
- CN202510032193.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-01-10
- Filing Date
- 2025-01-09
- Publication Date
- 2025-07-11
AI Technical Summary
In rope and belt elevator systems, when compensating chains of different densities are used, torque may be generated on the shaft structural frame and excessive pressure on the car boots or rollers.
The segment design of the compensation cable is adopted to gradually increase or decrease from one end to the other, ensuring uniform mass distribution. By adjusting the density relationship of the compensation cable and the density relationship of the driving belt and traveling cable, uniform mass distribution is achieved.
It effectively reduces the torque generated on the shaft structure frame, avoids excessive pressure on the car boots or heavy boots, and improves riding comfort.
Smart Images
Figure CN120288611A_ABST
Abstract
Description
Technical Field
[0001] The embodiments disclosed herein are directed to elevator systems with compensating chains, and more particularly to compensating chains having variable density. Background Art
[0002] In rope and belt elevator systems, it may be necessary to add a compensating chain to the system to ensure traction when the car or counterweight is at the top of the hoistway. When using different compensating chains with different densities, moments can be generated on the structural frame in the hoistway, and excessive pressure can be generated within the car shoes or onto the rollers. Summary of the Invention
[0003] An elevator system is disclosed that includes: an elevator car; a counterweight; compensating cables connecting the elevator car to the counterweight, wherein the compensating cables have the same cable length as each other and each extends from a first end to a second end, wherein each of the compensating cables is divided into segments, and each of the segments has the same segment length as each of the other segments, and wherein, in each of the compensating cables, adjacent segments in the segments have different segment densities from each other.
[0004] In addition to or as an alternative to one or more aspects of the system, each of the compensating cables has the same average density as each other.
[0005] In addition to or as an alternative to one or more aspects of the system, in each of the segments, the segment density is constant from end to end.
[0006] In addition to or as an alternative to one or more aspects of the system, in each of the compensating cables, the segments are arranged such that the segment density increases from the first end to the second end or from the second end to the first end.
[0007] In addition to or as an alternative to one or more aspects of the system, in adjacent compensating cables of the compensating cables, the segment density increases in opposite directions, such that in one of the compensating cables, the segment density increases from the first end to the second end, and in an adjacent one of the compensating cables, the segment density increases from the second end to the first end.
[0008] In addition to or as an alternative to one or more aspects of the system, in each of the compensating cables of the compensating cables, the average segment density is between 1 and 2 kilograms per meter (kg / m).
[0009] In addition to or as an alternative to one or more aspects of the system, the compensating cables include a first number N1 of compensating cables, and each of the compensating cables includes a second number N2 of segments, where N1 and N2 are the same as each other.
[0010] In addition to or as an alternative to one or more aspects of the system, the system includes: a drive belt having a drive belt density, connected between an elevator car and a counterweight; and a travel cable having a travel cable density, connected to the elevator car, wherein the relationship between the drive belt density, the travel cable density, and the compensating cable density is: 0.8 ≤ ρ(drive belt) / [ρ(travel cable) + ρ(compensating cable)] ≤ 1.2.
[0011] In addition to or as an alternative to one or more aspects of the system, the drive belt includes a third quantity N3 of drive belts, the third quantity N3 being the same as the first quantity N1 of compensating cables.
[0012] In addition to or as an alternative to one or more aspects of the system, the elevator car includes a top and a bottom; the drive belt is operatively connected to the top of the elevator car; the compensating cable and the travel cable are operatively connected to the bottom of the elevator car; and the drive belts in the drive belt are aligned with the compensating cables in the compensating cable.
[0013] Also disclosed is a method of manufacturing a set of compensating cables for an elevator system, which includes: forming the compensating cables to have the same cable length as each other, such that each compensating cable extends from a first end to a second end, the method including: forming each of the compensating cables to have interconnected segments, and each of the segments having the same segment length as each of the other segments; and in each of the compensating cables, forming adjacent segments in the segments to have different segment densities from each other.
[0014] In addition to or as an alternative to one or more aspects of the method, forming the compensating cables includes forming each of the compensating cables to have the same average density as each other.
[0015] In addition to or as an alternative to one or more aspects of the method, forming the compensating cables includes forming each of the segments such that the segment density is constant from end to end.
[0016] In addition to or as an alternative to one or more aspects of the method, forming the compensating cables includes forming each of the compensating cables such that the segments are arranged to have an increasing segment density from the first end to the second end or from the second end to the first end.
[0017] In addition to or as an alternative to one or more aspects of the method, the method includes arranging adjacent compensating cables in the compensating cables such that the segment density increases in opposite directions, such that in one of the compensating cables, the segment density increases from the first end to the second end, and in an adjacent one of the compensating cables, the segment density increases from the second end to the first end.
[0018] In addition to or as an alternative to one or more aspects of the method, forming a compensating cable includes forming each of the compensating cables such that the average segment density is between 1 and 2 kilograms per meter (kg / m).
[0019] In addition to or as an alternative to one or more aspects of the method, the method includes arranging compensating cables such that a first quantity N1 of compensating cables is in a group of compensating cables, and each of the compensating cables includes a second quantity N2 of segments, where N1 and N2 are the same as each other.
[0020] In addition to or as an alternative to one or more aspects of the method, the method includes: identifying a drive belt density of a drive belt configured to be connected between an elevator car of an elevator system and a counterweight of the elevator system; and identifying a traveling cable density of a traveling cable configured to be connected to the elevator car, where forming the compensating cable includes forming the compensating cable such that the relationship between the drive belt density, the traveling cable density, and the compensating cable density is: 0.8 ≤ ρ(drive belt) / [ρ(traveling cable) + ρ(compensating cable)] ≤ 1.2.
[0021] In addition to or as an alternative to one or more aspects of the method, the method includes identifying a third quantity N3 of drive belts for the elevator car, and selecting the quantity N1 of compensating cables to be equal to N3.
[0022] Also disclosed is a method of configuring an elevator car, which includes: operably coupling a drive belt to the top of the elevator car; and operably connecting a compensating cable manufactured according to one or more aspects of the method disclosed above, and a traveling cable to the bottom of the elevator car such that the drive belts in the drive belt are aligned with the compensating cables in the compensating cable. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The present disclosure is illustrated by way of example and is not limited to the drawings, in which like reference numerals indicate similar elements.
[0024] Figure 1 is a schematic diagram of an elevator system in which various embodiments of the present disclosure can be employed;
[0025] Figure 2 shows a side view of an elevator system configured with a compensating cable according to an embodiment;
[0026] Figure 3 shows a side view of an elevator system configured with a compensating cable according to an embodiment;
[0027] Figure 4 shows a method of manufacturing a group of compensating cables for an elevator system according to an embodiment; and
[0028] Figure 5A method of configuring an elevator car according to an embodiment is shown. DETAILED DESCRIPTION
[0029] Figure 1 is a perspective view of an elevator system 101, which includes an elevator car 103, a counterweight 105, a tension member 107, a guide rail (or track system) 109, a machine (or machine system) 111, a position reference system 113, and an electronic elevator controller (controller) 115. The elevator car 103 and the counterweight 105 are connected to each other by the tension member 107. The tension member 107 may include or be configured as, for example, ropes, steel cables, and / or coated steel belts. The counterweight 105 is configured to balance the load of the elevator car 103 and is configured to facilitate the simultaneous and opposite movement of the elevator car 103 within an elevator shaft (or hoistway) 117 and along the guide rail 109 relative to the counterweight 105.
[0030] The tension member 107 engages the machine 111, and the machine is part of the superstructure of the elevator system 101. The machine 111 is configured to control the movement between the elevator car 103 and the counterweight 105. The position reference system 113 may be mounted on a fixed part at the top of the elevator shaft 117, such as on a support or a guide rail, and may be configured to provide position signals related to the position of the elevator car 103 within the elevator shaft 117. In other embodiments, the position reference system 113 may be directly mounted to a moving member of the machine 111, or may be located at other positions and / or configurations known in the art. As is known in the art, the position reference system 113 may be any device or mechanism for monitoring the position of the elevator car and / or the counterweight. As will be recognized by those skilled in the art, the position reference system 113 may be, for example but not limited to, an encoder, a sensor, or other systems, and may include speed sensing, absolute position sensing, etc.
[0031] As shown, the controller 115 may be located in a controller room 121 of the elevator shaft 117 and is configured to control the operation of the elevator system 101, and specifically the operation of the elevator car 103. It will be recognized that the controller 115 need not be located in the control room 121, but may be located in the hoistway or other locations within the elevator system. For example, the controller 115 may provide drive signals to the machine 111 to control the acceleration, deceleration, leveling, stopping, etc. of the elevator car 103. The controller 115 may also be configured to receive position signals from the position reference system 113 or any other desired position reference device. When moving up or down within the elevator shaft 117 along the guide rail 109, the elevator car 103 may stop at one or more landings 125 as controlled by the controller 115. Although shown in the controller room 121, those skilled in the art will recognize that the controller 115 may be located and / or configured at other locations or positions within the elevator system 101. In one embodiment, the controller may be located remotely or in the cloud.
[0032] Machine 111 may include a motor or similar drive mechanism. According to an embodiment of the present disclosure, machine 111 is configured to include an electrically driven motor. The power source for the motor can be any power source (including the power grid) that is supplied to the motor in combination with other components. Machine 111 may include a traction sheave that applies a force to the tensioned member 107 to move the elevator car 103 within the hoistway 117.
[0033] Go to Figure 2 and Figure 3 , an additional aspect of the embodiment is shown. The embodiment includes an elevator system 101 having an elevator car 103 and a counterweight 105, the elevator car 103 and the counterweight 105 being connected by a belt 107 via a machine 111. A first pulley (or roller) 108A operatively coupled to the top 103A of the car 103 provides an operable connection of the belt 107 to the car 103. A second pulley (or roller) 108B operatively coupled to the top 105A of the counterweight 105 provides an operable connection of the belt 107 to the counterweight 105. For example, two belts 1071, 1072 are shown in the view of Figure 3 . The opposite ends of the belts 107A, 107B ( Figure 2 ) are fixed within or above the hoistway 117. A travel cable 180 connects the car 103 within the hoistway 117 to the controller 115 ( Figure 2 ).
[0034] A compensating cable 200 connects the elevator car 103 within the hoistway 117 to the counterweight 105. A first compensating cable 210 and a second compensating cable 220 are shown. The compensating cable 200 has an end-to-end (i.e., a first end 200A and a second end 200B) cable length that is the same as each other. The compensating cable 200 is coupled to the bottom 103B of the elevator car 103 via a car shoe 103C and is coupled to the bottom 105B of the counterweight 105 via a counterweight shoe 103D.
[0035] Each of the compensating cables 200 is divided into segments 230. Four segments 240, 250, 260, 270 are shown, with two segments in each of the first compensating cable and the second compensating cable 200. Each of the segments 230 has a segment length that is the same as each of the other segments 230 (end-to-end, i.e., a third end 230A and a fourth end 230B ( Figure 2 )). In each of the compensating cables 200, adjacent segments among the segments 230 have different segment densities from each other. Each of the compensating cables 200 has the same average density as each other. In each of the segments 230, the segment density is constant from end to end. In each of the compensating cables 200, the segments 230 are arranged such that the segment density increases from the first end to the second end or increases from the second end to the first end.
[0036] Among adjacent compensating cables in the compensating cable 200, the segment density increases in opposite directions. That is, in one of the compensating cables 200, the segment density increases from the first end 200A to the second end 200B, and in an adjacent one of the compensating cables 200, the segment density increases from the second end 200B to the first end 200A.
[0037] In each of the compensating cables in the compensating cable 200, the average segment density (or mass distribution) is between 1 and 2 kilograms per meter (kg / m).
[0038] The compensating cable 200 includes a first quantity N1 of compensating cables 200, and each of the compensating cables 200 includes a second quantity N2 of segments 230. In one embodiment, N1 and N2 are the same as each other. That is, as Figure 2 and Figure 3 shown, in the case where there are two compensating cables 200, each of the cables has two segments 230.
[0039] In the case where there are three or four segments 230 in the compensating cable 200, as indicated, each segment in one cable will become progressively denser from the first end to the second end of the compensating cable 200, or vice versa. In adjacent cables, the progression of the segment density will reverse. The average density in the cables will be the same as each other. For a greater number of floors, a greater number of compensating cables 200 will be provided.
[0040] The drive belt 107 has a drive belt density, and a traveling cable 180 having a traveling cable density is connected to the elevator car 103.
[0041] The relationship among the drive belt density, the traveling cable 180 density, and the compensating cable density is: 0.8 ≤ ρ(drive belt) / [ρ(traveling cable) + ρ(compensating cable)] ≤ 1.2. In this equation, the densities ρ of the drive belt 107 and the traveling cable 180 are constant.
[0042] The drive belt 107 includes a third quantity N3 of drive belts 107, and the third quantity N3 is the same as the first quantity N1 of the compensating cables 200. As shown, there are two drive belts 107 and two compensating cables 200.
[0043] The elevator car 103 includes a top and a bottom. The drive belt 107 is operably connected to the top of the elevator car 103. The compensating cable 200 and the traveling cable 180 are operably connected to the bottom of the car 103. The drive belts in the drive belt 107 are aligned with the compensating cables in the compensating cable 200. This provides balance for the elevator car 103.
[0044] Go to Figure 4, which shows a method of manufacturing a set of compensating cables 200 for an elevator system 101. As shown in block 410, the method includes forming the compensating cables 200 to have the same cable length as each other, such that each compensating cable extends from a first end to a second end.
[0045] As shown in block 420, forming the compensating cables 200 includes forming each of the compensating cables 200 with interconnecting segments 230, and each of the segments 230 has the same segment length as each of the other segments 230.
[0046] As shown in block 430, forming the compensating cables 200 includes forming adjacent segments in each of the compensating cables 200 to have different segment densities from each other.
[0047] As shown in block 440, forming the compensating cables 200 includes forming each of the compensating cables 200 to have the same average density as each other.
[0048] As shown in block 450, forming the compensating cables 200 includes forming each of the segments 230 such that the segment density is constant from end to end.
[0049] As shown in block 460, forming the compensating cables 200 includes forming each of the compensating cables 200 such that the segments 230 are arranged with an increasing segment density from the first end to the second end or from the second end to the first end.
[0050] As shown in block 470, the method includes arranging adjacent compensating cables in the compensating cables 200 such that the segment density increases in opposite directions, such that in one of the compensating cables 200, the segment density increases from the first end to the second end, and in an adjacent one of the compensating cables 200, the segment density increases from the second end to the first end.
[0051] As shown in block 480, forming the compensating cables 200 includes forming each of the compensating cables 200 such that the average segment density of each of the compensating cables 200 is between 1 and 2 kilograms per meter (kg / m).
[0052] As shown in block 490, the method includes arranging the compensating cables 200 such that a first number N1 of compensating cables 200 are in a group, and each of the compensating cables 200 includes a second number N2 of segments 230, where N1 and N2 are the same as each other.
[0053] As shown in block 500, the method includes identifying the drive belt density of a drive belt 107 configured to connect between an elevator car 103 of an elevator system 101 and a counterweight 105 of the elevator system 101. As shown in block 510, the method includes identifying the traveling cable 180 density of a traveling cable 180 configured to connect to the elevator car 103.
[0054] As shown in block 520, forming the compensating cable 200 includes forming the compensating cable 200 such that the relationship between the drive belt density, the traveling cable 180 density, and the compensating cable density is: 0.8 ≤ ρ(belt) / [ρ(traveling cable 180) + ρ(compensating cable 200)] ≤ 1.2.
[0055] As shown in block 530, the method includes identifying a third quantity N3 of the drive belt 107 for the elevator car 103, and selecting a first quantity N1 of the compensating cable 200 to be equal to N3.
[0056] Turning to Figure 5 , a method of configuring an elevator car 103 is shown. As shown in block 540, the method includes configuring the elevator car 103 by operably connecting the drive belt 107 to the top of the elevator car 103. As shown in block 550, the method includes operably connecting the compensating cable 200 and the traveling cable 180 to the bottom of the elevator car 103 such that the drive belts in the drive belt 107 are aligned with the compensating cables in the compensating cable 200.
[0057] Embodiments provide for using at least two compensating chains, where the mass distribution is equally distributed along the compensating chains, to avoid generating moments in the structural frame of the hoistway. The total length of the compensating chains is divided into segments with distributed density according to the configuration of the segments. When the car or counterweight is at the top of the hoistway, the total suspended mass is optimally distributed. Benefits of this embodiment include avoiding excessive pressure on rollers or car shoes or counterweight shoes due to minimizing the moments generated for non-equal masses of the compensating chains. Accordingly, the ride quality will be improved.
[0058] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.
[0059] Those skilled in the art will recognize that various exemplary embodiments are shown and described herein, and each exemplary embodiment has certain features in a particular embodiment, but the present disclosure is not limited thereto. On the contrary, the present disclosure may be modified to incorporate any number of variations, alterations, substitutions, combinations, sub-combinations, or equivalent arrangements that have not been previously described but are equivalent to the scope of the present disclosure. Additionally, although various embodiments of the present disclosure have been described, it will be understood that aspects of the present disclosure may only include some of the described embodiments. Therefore, the present disclosure is not to be considered limited by the foregoing description, but only by the scope of the appended claims.
Claims
1. An elevator system, comprising: An elevator car; A counterweight; A compensating cable connecting the elevator car to the counterweight, wherein the compensating cables have the same cable length as each other and each extends from a first end to a second end, wherein the compensating cables are each divided into segments, and each of the segments has the same segment length as each of the other segments, and wherein, in each of the compensating cables, adjacent segments in the segments have different segment densities from each other.
2. The system according to claim 1, wherein, Each of the compensating cables has the same average density as each other.
3. The system according to claim 2, wherein, In each of the segments, the segment density is constant from end to end.
4. The system according to claim 3, wherein, In each of the compensating cables, the segments are arranged such that the segment density increases from the first end to the second end or increases from the second end to the first end.
5. The system according to claim 4, wherein, In adjacent compensating cables among the compensating cables, the segment density increases in opposite directions, such that in one of the compensating cables, the segment density increases from the first end to the second end, and in an adjacent one of the compensating cables, the segment density increases from the second end to the first end.
6. The system according to claim 1, wherein, In each compensating cable among the compensating cables, the average segment density is between 1 and 2 kilograms per meter (kg / m).
7. The system according to claim 1, wherein, The compensating cables include a first number N1 of compensating cables, and each of the compensating cables includes a second number N2 of segments, where N1 and N2 are the same as each other.
8. The system according to claim 7, comprising: A drive belt having a drive belt density, connected between the elevator car and the counterweight; And A traveling cable having a traveling cable density, connected to the elevator car, where the relationship between the drive belt density, the traveling cable density, and the compensating cable density is: 0.8 ≤ ρ(drive belt) / [ρ(traveling cable) + ρ(compensating cable)] ≤ 1.
2.
9. The system according to claim 8, wherein, The drive belt includes a third number N3 of drive belts, and the third number N3 is the same as the first number N1 of the compensating cables.
10. The system according to claim 9, wherein, The elevator car includes a top and a bottom; The drive belt is operably connected to the top of the elevator car; The compensating cable and the traveling cable are operably connected to the bottom of the elevator car; And The drive belts in the drive belt are aligned with the compensating cables in the compensating cable.
11. A method of manufacturing a set of compensating cables for an elevator system, comprising: Forming the compensating cables to have the same cable length as each other, such that each compensating cable extends from a first end to a second end, The method includes: Each of the compensating cables is formed with interconnecting segments, and each of the segments has the same segment length as each of the other segments; and In each of the compensating cables, adjacent segments of the segments are formed to have different segment densities from each other.
12. The method according to claim 11, wherein, Forming the compensating cable includes: Each of the compensating cables is formed to have the same average density as each other.
13. The method according to claim 12, wherein, Forming the compensating cable includes: Each of the segments is formed such that the segment density is constant from end to end.
14. The method according to claim 13, wherein, Forming the compensating cable includes: Each of the compensating cables is formed such that the segments are arranged with an increasing segment density from the first end to the second end or from the second end to the first end.
15. The method according to claim 14, comprising: Adjacent compensating cables in the compensating cables are arranged such that the segment density increases in opposite directions, such that in one of the compensating cables, the segment density increases from the first end to the second end, and in an adjacent one of the compensating cables, the segment density increases from the second end to the first end.
16. The method according to claim 11, wherein, Forming the compensating cable includes: Each of the compensating cables is formed such that the average segment density is between 1 and 2 kilograms per meter (kg / m).
17. The method according to claim 11, comprising: The compensating cables are arranged such that a first number N1 of compensating cables are in the group of compensating cables, and each of the compensating cables includes a second number N2 of segments, where N1 and N2 are the same as each other.
18. The method according to claim 17, comprising: Identifying the drive belt density of a drive belt configured to be connected between an elevator car of the elevator system and a counterweight of the elevator system; And Identifying the traveling cable density of a traveling cable configured to be connected to the elevator car, where forming the compensating cable includes Forming the compensating cable such that the relationship between the drive belt density, the traveling cable density, and the compensating cable density is: 0.8 ≤ ρ(drive belt) / [ρ(traveling cable) + ρ(compensating cable)] ≤ 1.
2.
19. The method according to claim 18, comprising: Identifying a third number N3 of drive belts for the elevator car and selecting the number N1 of compensating cables to be equal to N3.
20. A method of configuring an elevator car, comprising: Operably coupling a drive belt to the top of the elevator car; And Operably connecting a compensating cable manufactured by the method according to claim 19 and a traveling cable to the bottom of the elevator car such that the drive belts in the drive belt are aligned with the compensating cables in the compensating cable.