Elevator double-layer sound insulation structure and elevator car

Abstract

This invention discloses a double-layer sound insulation structure for elevators, comprising a first sound insulation structure, a second sound insulation structure, and an anti-detachment limiting structure. The second sound insulation structure includes a car top panel and a car wall panel. The anti-detachment limiting structure prevents the first sound insulation structure from falling off the second sound insulation structure. The first sound insulation structure includes: a support frame fixedly mounted on the second sound insulation structure, the support frame forming a rectangular lattice array; an elastic membrane covering the support frame; a sealed cavity formed by the support frame, the elastic membrane, and the second sound insulation structure; and a resonant sound absorber disposed on the elastic membrane. This invention can effectively improve the sound insulation performance of the elevator car and reduce the amount of external noise entering the car interior through the car.

Description

Technical Field

[0001] This invention relates to the field of elevators, specifically to a double-layer sound insulation structure for elevators. This invention also relates to an elevator car. Background Technology

[0002] When an elevator car is running in the elevator shaft, it is subjected to a large amount of external noise, including wind noise, sudden noise, and machine room noise. This external noise is transmitted through the car structure and enters the car interior, thus causing noise inside the car.

[0003] As elevator speeds increase, insufficient sound insulation in the elevator car can lead to excessive noise levels inside the car during operation, affecting the comfort of riding in the elevator. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an elevator car structure that can effectively improve the sound insulation performance of the car and reduce the external noise entering the car through the car.

[0005] To solve the above-mentioned technical problems, this invention discloses a double-layer sound insulation structure for elevators, including a first sound insulation structure, a second sound insulation structure, and an anti-detachment limiting structure, wherein the second sound insulation structure includes a car top panel and a car wall panel; the anti-detachment limiting structure is used to prevent the first sound insulation structure from falling off the second sound insulation structure; the first sound insulation structure includes:

[0006] A support frame is fixedly mounted on the second sound insulation structure, and the support frame forms a rectangular lattice array;

[0007] An elastic film is used to cover the support frame;

[0008] The sealed cavity is formed by the supporting frame, the elastic membrane, and the second sound insulation structure;

[0009] A resonant sound absorber is disposed on the elastic film.

[0010] Preferably, within a single lattice of the lattice array, the mass of the second sound-insulating structure is greater than the mass of the first sound-insulating structure.

[0011] Preferably, the anti-detachment limiting structure includes:

[0012] The fixing bolts are used to fix the second sound insulation structure.

[0013] The limiting anti-detachment plate has an opening through which a fixing bolt passes and is fixed with a nut. The limiting anti-detachment plate is Z-shaped.

[0014] Preferably, the elastic film material is a metallic material, a composite material, or a polymer material.

[0015] Preferably, the sealed cavity is formed by the support frame, the elastic membrane, and the second sound insulation structure.

[0016] Preferably, the support frame is a rectangular lattice array with one end open, and the sealed cavity is formed by the support frame and an elastic membrane.

[0017] Preferably, the sealed cavity is filled with inert gas or is in a vacuum state.

[0018] Preferably, the support frame is made of composite material or polymer material, and the support frame is attached to the second sound insulation structure.

[0019] Preferably, the support frame is divided into a support frame body and a support frame enclosure. The support frame body is made of metal, and the support frame enclosure is made of damping material.

[0020] Preferably, the supporting frame, elastic film, and resonant sound absorber are integrally formed from the same material.

[0021] Preferably, an air layer and sound-absorbing material are formed inside the sealed cavity.

[0022] Preferably, only one resonant sound absorber is provided on the elastic film in a single lattice of the lattice array, and at least two types of resonant sound absorbers are provided on the elastic films in all lattices of the lattice array.

[0023] Preferably, the height of each sealed cavity is at least two different heights.

[0024] Preferably, at least two resonant sound absorbers are provided on the elastic film within a single lattice of the lattice array.

[0025] Preferably, the mass of the resonant sound absorbers disposed on the elastic thin film within a single crystal lattice is different.

[0026] Preferably, in the elevator double-layer sound insulation structure provided at the car top plate, the first sound insulation structure is formed on the upper or lower side of the car top plate.

[0027] The present invention also discloses an elevator car with a double-layer sound insulation structure, including a car top, car walls, car bottom, front wall, car door, and entrance / exit upper plate, wherein the car top includes a car top plate, and the car walls include car wall plates. Attached Figure Description

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0029] Figure 1 This is a schematic diagram of an elevator car.

[0030] Figure 2 This is a partial cross-sectional view of the car in Embodiment 1.

[0031] Figure 3 This is a partial top view of the car roof in Embodiment 1.

[0032] Figure 4 This is a partial cross-sectional view of the car roof in Embodiment 1.

[0033] Figure 5 It is an equivalent diagram of the double-layer sound insulation structure of the car roof and the two-degree-of-freedom mass stiffness system.

[0034] Figure 6 This is a schematic diagram illustrating the principle of resonance (resonance point) when the double-layer sound insulation structure of the car roof resonates in the same direction.

[0035] Figure 7 This is a schematic diagram illustrating the principle of resonance in the same direction (reverse resonance point) of the double-layer sound insulation structure on the car roof.

[0036] Figure 8 This is a comparison diagram of the sound insulation of the car roof in Example 1 and the traditional car roof.

[0037] Figure 9 This is a partial cross-sectional view of the car in Embodiment 2.

[0038] Figure 10 This is a comparison diagram of the sound insulation of the car roof (with two anti-resonance points) in Example 2 and the traditional car roof.

[0039] Figure 11 This is a partial cross-sectional view of the car in Embodiment 3.

[0040] Figure 12 This is a partial cross-sectional view of the car in Embodiment 4.

[0041] Figure 13 This is a comparison diagram of the sound insulation of the car roof (with four anti-resonance points) in Example 4 and the traditional car roof.

[0042] Figure 14 This is a partial cross-sectional view of the car in Embodiment 5.

[0043] Figure 15 This is a partial top view of the car roof in Embodiment 5.

[0044] Figure 16 This is a partial cross-sectional view of the car in Embodiment 8.

[0045] Figure 17 This is a partial cross-sectional view of the car in Embodiment 10.

[0046] Explanation of the reference numerals in the figure:

[0047] 1. Car roof 2. Car walls

[0048] 3. Car bottom 4. Front wall

[0049] 5 car doors 6 entrance and exit upper panels

[0050] 11 Car roof panel 21 Car side panel

[0051] 12, 22 Support frame; 13, 23 Elastic membrane

[0052] 14, 24 Resonant sound absorbers; 15, 25 Air layer

[0053] 16, 26 Limiting anti-detachment plates; 17, 27 Fixing bolts

[0054] 18 and 28 nuts Detailed Implementation

[0055] Example 1

[0056] This invention discloses a double-layer sound insulation structure for an elevator, including a first sound insulation structure, a second sound insulation structure, and an anti-detachment limiting structure. The second sound insulation structure includes a car top panel 11 and a car wall panel 21. The anti-detachment limiting structure is used to prevent the first sound insulation structure from falling off the second sound insulation structure.

[0057] The first sound insulation structure includes:

[0058] Support frames 12 and 22 are fixedly mounted on the second sound insulation structure, and the support frames 12 and 22 form a rectangular lattice array;

[0059] Elastic films 12 and 23 cover the support frame;

[0060] The sealed cavity is formed by the support frames 12 and 22, the elastic film 12 and 23 and the second sound insulation structure, and an air layer 15 and 25 are formed inside the sealed cavity;

[0061] Resonant sound absorbers 14 and 24 are disposed on the elastic films 12 and 23.

[0062] The following section further details the specific applications of this invention.

[0063] The double-layer sound insulation structure of the elevator of the present invention is mainly applied to the elevator car, which includes a car top 1, a car wall 2, a car bottom 3, a front wall 4, a car door 5, and an entrance / exit upper plate 6;

[0064] The car roof 1 includes a car roof plate 11, a support frame 12 is fixed on the outside of the car roof plate 11, the support frame 12 forms a rectangular lattice array, an elastic film 13 is fixed on the support frame 12, and a resonant sound absorber 14 is fixed at the center of the elastic film 13.

[0065] The support frame 12 can be made of composite material or polymer material with damping properties, and is fixed to the car roof plate 11 by means of bonding or other methods.

[0066] The elastic film 13 is made of metallic materials, composite materials, or polymer materials;

[0067] The supporting frame 12, elastic film 13, and resonant sound absorber 14 can also be integrally formed from the same material;

[0068] The car roof panel 11, the support frame 12, and the elastic film 13 form a closed cavity, and there is an air layer 15 inside the cavity.

[0069] The supporting frame 12, elastic film 13, resonant sound absorber 14, and air layer 15 together constitute the outer structure of the car roof, and the outer structure of the car roof and the car roof plate 11 form a double-layer sound insulation structure of the car roof.

[0070] A fixing bolt 17 is located at the outer end of the car roof 1 near the support frame 12. The fixing bolt 17 is fixed to the car roof plate 11 by welding. The "Z"-shaped limiting anti-detachment plate 16 passes through the fixing bolt 17 through the opening on the plate and is fixed with a nut 18. The limiting anti-detachment plate 16 can effectively prevent the outer structure of the car roof from falling off the car roof plate 11.

[0071] Similarly, the car wall 2 includes a car wall panel 21, a support frame 22 is fixed on the outside of the car wall panel 21, the support frame 22 forms a rectangular lattice array, an elastic film 23 is fixed on the support frame 22, and a resonant sound absorber 24 is fixed at the center of the elastic film 23.

[0072] The support frame 22 can be made of composite material or polymer material with damping properties, and is fixed to the car roof plate 21 by means of bonding or other methods;

[0073] The elastic film 23 is made of metallic materials, composite materials, or polymer materials;

[0074] The supporting frame 22, elastic film 23, and resonant sound absorber 24 can also be integrally formed from the same material;

[0075] The car wall panel 21, the support frame 22, and the elastic film 23 form a closed cavity, and there is an air layer 25 inside the cavity.

[0076] The supporting frame 22, elastic film 23, resonant sound absorber 24, and air layer 25 together constitute the outer structure of the car wall, and the outer structure of the car wall and the car wall panel 21 form a double-layer sound insulation structure of the car wall.

[0077] There is a fixing bolt 27 at the outer end of the car wall 2 near the support frame 22. The fixing bolt 27 is fixed to the car wall panel 21 by welding. The "Z"-shaped limiting anti-detachment plate 26 passes through the fixing bolt 27 through the opening on the plate and is fixed with a nut 28. The limiting anti-detachment plate 26 can effectively prevent the outer structure of the car wall from falling off the car wall panel 21.

[0078] like Figure 5 The working principle of the double-layer sound insulation structure based on the car roof 1 is explained. Within a single lattice enclosed by the support frame 12 at the car roof 1, the double-layer sound insulation structure of the car roof can be regarded as a set of two-degree-of-freedom mass-stiffness system. Within the lattice area, the car roof plate 11 can be regarded as a large resonant sound absorber with an equivalent mass m2, the resonant sound absorber 14 can be regarded as a small resonant sound absorber with an equivalent mass m1, the support frame 12 and the elastic film 13 can be regarded as springs with stiffness k1, the air layer 15 can be regarded as springs with stiffness k2, and the car roof part outside the lattice area can be regarded as springs with stiffness k3.

[0079] like Figure 6 , Figure 7 , Figure 8 As shown, when m2 >> m1, the resonant sound absorber 14 is equivalent to an additional vibration absorber added to the car roof panel 11. When the external sound source is the reverse resonant frequency of the double-layer sound insulation structure, the car roof panel 11 hardly vibrates. The resonant sound absorber 14 resonates and absorbs energy in a form that resonates with the car roof panel 11 in the opposite direction. After the external noise of this frequency propagates to the resonant sound absorber 14, it excites the resonant sound absorber 14 to resonate and dissipate, so that the sound insulation performance of the car roof will be greatly amplified near the reverse resonant frequency. When the external sound source is the same-direction resonant frequency of the double-layer sound insulation structure, the car roof panel 11 and the resonant sound absorber 14 resonate in the same direction, forming a collapse zone of sound insulation performance near the same-direction resonant frequency, which leads to a significant decrease in the sound insulation capacity of the car roof. When the frequency is greater than the same-direction resonant frequency, the sound insulation performance of the car roof will be significantly improved compared with the traditional single-layer car roof.

[0080] The working principle of the car wall 2 is the same as that of the car top 1.

[0081] The main frequencies of external noise sources during elevator operation are concentrated in the 250-600Hz frequency range. By adjusting the mass of the resonant sound absorber 14 and resonant sound absorber 24, or adjusting the thickness of the air layer 15 and air layer 25, or adjusting the tension of the elastic film 13 and elastic film 23, the resonant frequency can be lower than the main frequency range of the external noise sources, thereby significantly improving the noise level inside the elevator car.

[0082] Example 2

[0083] like Figure 9Based on Embodiment 1, at the center of the elastic film 13 at the car roof 1, there are at least two types of resonant sound absorbers; at the center of the elastic film 23 at the car wall 2, there are at least two types of resonant sound absorbers.

[0084] The double-layer sound insulation structure of the car roof 1, which is composed of the car roof plate 11, the support frame 12, the elastic film 13, the resonant sound absorber 14, and the air layer 15, forms no less than two sets of two-degree-of-freedom mass stiffness systems and has more than two anti-resonance points. Similarly, more than two anti-resonance points also appear at the car wall 2.

[0085] As the number of anti-resonance points increases, the frequency range of the sound insulation collapse zone will be greatly reduced, and the sound insulation performance at the frequency of the same-direction resonance point will also be improved accordingly.

[0086] Example 3

[0087] like Figure 11 Based on Embodiment 1, the car roof panel 11, the support frame 12, and the elastic film 13 form a sealed air layer of at least two heights; the car wall panel 21, the support frame 22, and the elastic film 23 form a sealed air layer of at least two heights.

[0088] Example 4

[0089] like Figure 12 Based on Embodiment 1, at least two types of resonant sound absorbers of different masses are fixed at the center of the elastic film 13 at the car roof 1; the car roof panel 11, the support frame 12, and the elastic film 13 form a sealed air layer of at least two heights; at the center of the elastic film 23 at the car wall 2, at least two types of resonant sound absorbers of different masses are fixed; the car wall panel 21, the support frame 22, and the elastic film 23 form a sealed air layer of at least two heights; the resonant sound absorbers of different masses and the sealed air layers of different heights are matched with each other to form at least four sets of two-degree-of-freedom mass stiffness systems.

[0090] Example 5

[0091] like Figure 14 , Figure 15Based on Embodiment 1, a set of resonant sound-absorbing body arrays 19 are fixed at the center of the elastic membrane 13 at the car roof 1. The resonant sound-absorbing body array 19 consists of no less than two independent resonant sound-absorbing bodies. A set of resonant sound-absorbing body arrays 29 are fixed at the center of the elastic membrane 23 at the car wall 2. The resonant sound-absorbing body array consists of no less than two independent resonant sound-absorbing bodies. Each independent resonant sound-absorbing body, together with the support frame, elastic membrane, and air layer, forms an independent two-degree-of-freedom mass-stiffness system. Each set of resonant sound-absorbing body arrays can be equivalently regarded as a large-mass sound absorber, and together with the support frame, elastic membrane, and air layer, forms an independent two-degree-of-freedom mass-stiffness system. Each independent two-degree-of-freedom mass-stiffness system has an anti-resonance point, which can greatly increase the number of anti-resonance points and improve the sound insulation of the car structure.

[0092] Example 6

[0093] Based on Embodiment 1, the support frame is made of metal, and damping material with damping is pasted on the support frame. The support frame is fixed to the car roof plate by welding or pasting.

[0094] Example 7

[0095] Based on Embodiment 1, the car roof panel 11, the support frame 12, and the elastic film 13 form a closed cavity, and the cavity is filled with sound-absorbing material; the car wall panel 21, the support frame 22, and the elastic film 23 form a closed cavity, and the cavity is filled with sound-absorbing material.

[0096] Example 8

[0097] like Figure 16 Based on Embodiment 1, a support frame 12 is fixed to the outside of the car roof panel 11. The support frame 12 is a rectangular lattice array with one end open. The support frame 12 and the elastic film 13 form a sealed cavity with an air layer 15 inside. A support frame 22 is fixed to the car wall panel 21. The support frame 22 forms a rectangular lattice array with one end open. The support frame 22 and the elastic film 23 form a sealed cavity with an air layer 25 inside.

[0098] Example 9

[0099] Based on Embodiment 8, a support frame 12 is fixed to the outside of the car roof panel 11, and the support frame 12 forms a rectangular lattice array with one end open; the support frame 12 and the elastic film 13 form a sealed cavity, which is filled with inert gas or is in a vacuum state; a support frame 22 is fixed to the outside of the car wall panel 21, and the support frame 22 forms a rectangular lattice array with one end open; the support frame 22 and the elastic film 23 form a sealed cavity, which is filled with inert gas or is in a vacuum state.

[0100] Example 10

[0101] like Figure 17 The car roof 1 includes a car roof plate 11, a support frame 12 is fixed inside the car roof plate 11, an elastic film 13 is fixed on the support frame 12, and a resonant sound absorber 14 is fixed at the center of the elastic film 13.

[0102] The car roof panel 11, the support frame 12, and the elastic film 13 form a closed cavity, and there is an air layer 15 inside the cavity.

[0103] The supporting frame 12, elastic film 13, resonant sound absorber 14, and air layer 15 together constitute the inner structure of the car roof, and the inner structure of the car roof and the car roof plate 11 form a double-layer sound insulation structure of the car roof.

[0104] There is a fixing bolt 17 at the inner end of the car roof 1 near the support frame 12. The fixing bolt 17 is fixed to the car roof plate 11 by welding. The "Z"-shaped limiting anti-detachment plate 16 passes through the fixing bolt 17 through the opening on the plate and is fixed with a nut 18. The limiting anti-detachment plate 16 can effectively prevent the inner structure of the car roof from falling off the car roof plate 11.

[0105] Example 11

[0106] Based on Embodiment 1, the present invention also discloses an elevator car, the elevator car including a car top 1, a car wall 2, a car bottom 3, a front wall 4, a car door 5, and an entrance / exit upper plate 6; wherein, the car top 1 includes a car top plate 11, and the car wall 2 includes a car wall plate 21.

[0107] The car door 5, the entrance / exit upper plate 6, and the outer side of the front wall are fixed with a support frame. An elastic film is fixed on the support frame, and a resonant sound absorber is fixed at the center of the elastic film. The base plate of the car door, the entrance / exit upper plate, and the front wall, together with the support frame, the elastic film, and the resonant sound absorber, form a sealed cavity with an air layer inside the cavity.

Claims

1. A double-layer sound insulation structure for elevators, characterized in that, It includes a first sound insulation structure, a second sound insulation structure, and an anti-detachment limiting structure, wherein the second sound insulation structure includes a car roof panel and a car wall panel; the anti-detachment limiting structure is used to prevent the first sound insulation structure from falling off the second sound insulation structure. The first sound insulation structure includes: A support frame is fixedly mounted on the second sound insulation structure, and the support frame forms a rectangular lattice array; An elastic film is used to cover the support frame; The sealed cavity is formed by the supporting frame, the elastic membrane, and the second sound insulation structure; A resonant sound absorber is disposed on the elastic film; The height of each sealed cavity is at least two different heights. Within a single lattice of the lattice array, the mass of the second sound-insulating structure is greater than the mass of the first sound-insulating structure.

2. The elevator double-layer sound insulation structure as described in claim 1, characterized in that, The anti-detachment limiting structure includes: The fixing bolts are used to fix the second sound insulation structure. The limiting anti-detachment plate has an opening through which a fixing bolt passes and is fixed with a nut. The limiting anti-detachment plate is Z-shaped.

3. The elevator double-layer sound insulation structure as described in claim 1, characterized in that, The elastic film material is a metallic material, a composite material, or a polymer material.

4. The elevator double-layer sound insulation structure as described in claim 1, characterized in that, The sealed cavity is filled with inert gas or is in a vacuum state.

5. The elevator double-layer sound insulation structure as described in claim 1, characterized in that, The support frame is made of composite material or polymer material and is attached to the second sound insulation structure.

6. The elevator double-layer sound insulation structure as described in claim 1, characterized in that, The support frame is divided into a support frame body and a support frame enclosure. The support frame body is made of metal, and the support frame enclosure is made of damping material.

7. The elevator double-layer sound insulation structure as described in claim 1, characterized in that, The supporting frame, elastic membrane, and resonant sound absorber are all integrally formed from the same material.

8. The elevator double-layer sound insulation structure as described in claim 1, characterized in that, An air layer and sound-absorbing material are formed inside the sealed cavity.

9. The elevator double-layer sound insulation structure as described in claim 1, characterized in that, In the lattice array, only one resonant sound absorber is provided on the elastic film in a single lattice, while at least two types of resonant sound absorbers are provided on the elastic films in all lattices of the lattice array.

10. The elevator double-layer sound insulation structure as described in claim 1, characterized in that, At least two resonant sound absorbers are provided on the elastic film within a single lattice of the lattice array.

11. The elevator double-layer sound insulation structure as described in claim 10, characterized in that, The mass of the resonant sound absorbers placed on the elastic thin film within a single crystal lattice varies.

12. The elevator double-layer sound insulation structure as described in claim 1, characterized in that, In the elevator double-layer sound insulation structure installed on the car top plate, the first sound insulation structure is formed on the upper or lower side of the car top plate.

13. An elevator car using the double-layer sound insulation structure as described in any one of claims 1-10, characterized in that, It includes a car top, car walls, car bottom, front wall, car door, and entrance / exit panel, wherein the car top includes a car top panel, and the car walls include car wall panels.

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