Rotary wheel sealing structure of rotary wheel dehumidifier

Abstract

The utility model discloses a rotating wheel sealing structure of a rotating wheel dehumidifier. The rotating wheel sealing structure comprises a U-shaped outer clamp, the U-shaped inner clamp is arranged in the opening of the U-shaped outer clamp; two ends of the silicone rubber strip are respectively clamped between the U-shaped outer clamp and the U-shaped inner clamp; the outer side of the silicone rubber strip is coated with a polytetrafluoroethylene composite coating; a polytetrafluoroethylene film is adhered to the outer side of the polytetrafluoroethylene composite coating; the polytetrafluoroethylene film abuts against the honeycomb face of the rotating wheel, so that the U-shaped outer arch of the silicone rubber strip is flattened and is provided with a cavity. The silicone rubber strip enables the polytetrafluoroethylene film to abut against the honeycomb face of the dehumidification rotating wheel through automatic elasticity, the sealing effect is guaranteed, meanwhile, the abrasion resistance of the sealing structure is improved, and the motion resistance of the dehumidification rotating wheel is reduced. The silicone rubber strip and the honeycomb surface have a sealing surface which is large enough and can bear larger airflow pressure, and in addition, the hollow arc can isolate heat conduction.

Description

Technical Field

[0001] The utility model belongs to the technical field of air dehumidification, and in particular relates to a rotary dehumidifier wheel sealing structure. Background Art

[0002] The dehumidification wheel is the most critical core component of the rotary dehumidifier. During dehumidification, the dehumidification wheel seals and isolates the air on the treatment side from the air on the regeneration side through the regeneration sealing strip. The air on the treatment side is very dry air, while the air in the regeneration area is high-temperature and humid air, so these two air streams must be sealed and isolated. The better the isolation of the regeneration sealing strip, the higher the dehumidification efficiency of the dehumidification wheel and the better the dehumidification performance.

[0003] The dehumidification wheel rotates slowly at a speed of 4-15R / h during dehumidification, while the regeneration sealing strip is fixed on the wheel frame and remains stationary, which makes sealing difficult.

[0004] At present, the dehumidifier industry generally adopts two types of seals: scraper seal and arc surface friction structure. The scraper seal structure is achieved by compounding a layer of 0.18mm polytetrafluoroethylene film on a flat high-temperature resistant silicone rubber strip to improve wear resistance and reduce friction resistance. The sealing strip is fixed to the regeneration area of ​​the rotor frame by steel plates and screws. The sealing strip is bent from a flat sheet into a right angle shape. Through the rebound stress of the seal bend, the polytetrafluoroethylene surface of the sealing strip is tightly attached to the honeycomb surface in the rotation direction of the dehumidification rotor, thereby isolating the regenerated high-temperature and high-humidity air of the dehumidification rotor from the dry air. The advantage of this sealing structure is that the friction resistance of the rotor drive is very small, the cost is low, and the maintenance and replacement are easy. The disadvantage is that the sealing strip joint is difficult to handle and the sealing performance is poor. When subjected to large air pressure, the rebound stress of the sealing strip cannot overcome the high-temperature and high-humidity air that is easily leaked from the regeneration side, and the low-temperature air on the treatment side and the high-temperature air on the regeneration side are extremely easy to conduct.

[0005] At present, the most advanced seal in the dehumidifier industry is the use of hollow arc contact sealing strips. Through the contact between the impeller and the hollow arc, the hollow arc is deformed by the pre-tightening force, and the stress of the sealing strip is applied to the honeycomb surface of the dehumidification impeller. In this way, the sealing performance is greatly improved, and the stress of the sealing strip can withstand greater air pressure; however, the hollow arc sealing strips currently available on the market have excessive stress, resulting in a problem of high friction resistance in the impeller drive, and the arc surface of this sealing strip is irregular in shape and cannot be composited with polytetrafluoroethylene film, which is also one of the reasons for the high friction resistance. In the absence of polytetrafluoroethylene film, the wear life of the silicone rubber strip will be reduced by at least half.

[0006] Chinese patent publication number CN219796095U discloses a rotor dehumidification sealing structure, in which a polytetrafluoroethylene (PTFE) sealing ring on the rotor side is fixed to the outer periphery of the rotor side flange. The polytetrafluoroethylene (PTFE) sealing ring on the rotor side extends beyond the rotor side flange in the thickness direction of the rotor and overlaps with the polytetrafluoroethylene (PTFE) sealing ring on the chassis side in the thickness direction of the rotor to form a sealing area. The elastic leaf ring is cylindrical and includes a connected elastic leaf portion and a pressing portion in the height direction. The elastic leaf portion has a strip-shaped cross section and the pressing portion has a ring-shaped cross section. The elastic leaf portion is arranged corresponding to the outer periphery of the rotor side flange. The rotor side fastening clamp is arranged corresponding to the elastic leaf portion to fix the elastic leaf ring to the rotor side flange. The novel rotor dehumidification sealing structure provides a high-quality sealing effect through the sealing area. The rotor side fastening clamp is arranged corresponding to the elastic leaf portion to fix the elastic leaf ring to the rotor side flange. The elastic leaf portion elastically presses the pressing portion toward the sealing area, and the elastic leaf ring generates an elastic force, thereby ensuring the sealing effect at the sealing area.

[0007] Because the PTFE seal has excellent flexibility and wear resistance, the sealing structure in the aforementioned patent is located in the outer peripheral gap of the rotor, where it is subjected to very low gas pressure, and the PTFE seal does not deform. However, the sealing structure used for dehumidification rotor partitions, such as the sealing structure between the treatment zone and the regeneration zone, often has to withstand higher gas pressures, and the PTFE is prone to deformation due to gas pressure, thus failing to provide an adequate sealing effect. Therefore, even though PTFE has excellent wear resistance, it is not used in the sealing structure of dehumidification rotor partitions. Instead, silicone rubber strips are used, which have poorer wear resistance but better elastic strain capacity. Utility Model Content

[0008] In order to overcome the technical problems in the prior art that the silicone rubber strips used for dehumidification wheel partitioning (against the honeycomb surface of the dehumidification wheel) have poor wear resistance and the surface of the silicone rubber strips has an irregular shape and cannot be composited with a polytetrafluoroethylene film; one purpose of the utility model is to provide a rotary dehumidifier wheel sealing structure, by first coating a layer of polytetrafluoroethylene composite coating on the surface of the silicone rubber strip and then pasting the polytetrafluoroethylene film, the stability of the composite layer can be ensured, and the silicone rubber strip uses elasticity to make the polytetrafluoroethylene film press against the honeycomb surface of the dehumidification wheel and have a sufficiently large contact area, thereby ensuring sufficient sealing while reducing friction and increasing service life.

[0009] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a rotary dehumidifier rotor sealing structure, comprising a U-shaped outer clamp, which is arranged on the square tube of the rotor frame; a U-shaped inner clamp, which is arranged in the opening of the U-shaped outer clamp, and the opening of the U-shaped outer clamp is directly opposite to the opening of the U-shaped inner clamp; a silicone rubber strip, which is bent into a U shape, and the two ends of the silicone rubber strip are respectively clamped between the U-shaped outer clamp and the U-shaped inner clamp, and a cavity is formed between the bent middle part of the silicone rubber strip and the U-shaped inner clamp; wherein, the outer side of the silicone rubber strip is coated with a polytetrafluoroethylene composite coating; a polytetrafluoroethylene film is adhered to the outer side of the polytetrafluoroethylene composite coating; the polytetrafluoroethylene film is located on the outside of the cavity, and the cavity is elastically compressed so that the polytetrafluoroethylene film is pressed against the honeycomb surface of the rotor.

[0010] A layer of polytetrafluoroethylene composite coating is first applied in the middle of a flat silicone rubber strip, and then a layer of 0.18mm polytetrafluoroethylene film is pasted. The two ends are bent and inserted between the U-shaped outer clamp and the U-shaped inner clamp. In this way, the sealing strip in the regeneration area is made into an arc shape and is hollow. This wheel sealing structure has a hollow layer that can well isolate the regenerated heat from being conducted to the low-temperature treatment air side. The width of the U-shaped outer clamp and the U-shaped inner clamp determines the arc of the silicone rubber strip after bending. Compared with the hollow sealing strip purchased on the market, this arc is larger and more flexible, thereby reducing stress. Since the polytetrafluoroethylene film can be compositely pasted on the regular flat surface, the friction resistance is also reduced accordingly, and the sealing surface will be larger after compression, thereby improving the sealing performance.

[0011] Furthermore, the polytetrafluoroethylene composite coating is strip-shaped, and both ends are respectively located between the U-shaped outer clip and the U-shaped inner clip; the two ends of the polytetrafluoroethylene film are also respectively located between the U-shaped outer clip and the U-shaped inner clip.

[0012] Specifically, the thickness of the polytetrafluoroethylene film is 0.18 mm; the thickness of the polytetrafluoroethylene composite coating is 0.22 mm.

[0013] Furthermore, a high temperature resistant sealant is provided between the U-shaped outer clamp and the square tube of the runner frame.

[0014] Furthermore, bent outer edges are respectively provided on both sides of the opening of the U-shaped outer clip; the bent outer edges are flush with the end of the U-shaped inner clip away from its opening.

[0015] Furthermore, the U-shaped outer clamp is fixed to the square tube of the runner frame by a first screw; the first screw is located in the opening of the U-shaped inner clamp.

[0016] Furthermore, the U-shaped outer clip and the U-shaped inner clip are fixedly connected together by a second screw.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. By first applying a layer of polytetrafluoroethylene composite coating on the silicone rubber strip and then pasting the polytetrafluoroethylene film, the polytetrafluoroethylene film and the silicone rubber strip are stably combined. The silicone rubber strip uses automatic elasticity to keep the polytetrafluoroethylene film and the honeycomb surface of the dehumidification wheel in close contact, ensuring the sealing effect while increasing the wear resistance of the sealing structure and reducing the movement resistance of the dehumidification wheel.

[0019] 2. The flat silicone rubber strip is bent into a hollow arc state and pressed against the honeycomb surface of the dehumidification wheel. The silicone rubber strip and the honeycomb surface have a sufficiently large contact surface, that is, the sealing surface is larger, which can withstand greater airflow pressure and has better sealing performance. In addition, the hollow arc can also isolate the conduction of heat in the regeneration and treatment areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the installation structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the silicone rubber strip of the present invention in a flat plate state;

[0022] Figure 3 This is a schematic diagram of the silicone rubber strip of the present invention in a bent state.

[0023] In the figure: 1. U-shaped outer clamp; 11. Bent outer eaves; 2. U-shaped inner clamp; 3. Silicone rubber strip; 4. Polytetrafluoroethylene membrane; 5. Polytetrafluoroethylene composite coating; 6. First screw; 7. Second screw; 8. Rotor frame square tube; 9. High-temperature resistant sealant; 10. Dehumidification wheel honeycomb surface. DETAILED DESCRIPTION

[0024] Below, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating directions and positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Therefore, the terms "first" and "second" may explicitly or implicitly refer to one or more of these features. In the description of this utility model, "several" means two or more, unless otherwise specifically defined.

[0027] In this utility model, unless otherwise specified or limited, terms such as "disposed" and "installed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection; direct connection, connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0028] See also Figure 1-Figure 3 , produced as attached Figure 2 The flat silicone rubber strip 3 shown is a high-temperature resistant silicone rubber strip with a width of 80 mm and a thickness of 2 mm. A 0.22 mm thick polytetrafluoroethylene composite coating 5 is applied to the center of the surface. A 0.18 mm thick polytetrafluoroethylene film 4 of equal length is then attached to the polytetrafluoroethylene composite coating 5. The polytetrafluoroethylene film 4 rubs against the honeycomb surface 10 of the dehumidification wheel, thereby reducing the driving friction resistance of the dehumidification wheel and improving the wear resistance of the sealing strip. The silicone rubber strip 3 provides sufficient stress support for the arc hollow structure. Figure 3 It is the shape of the bent silicone rubber strip 3.

[0029] As attached Figure 3 The figure shows the impeller sealing structure after the silicone rubber strip 3 is installed, including a U-shaped outer clamp 1, which is arranged on the square tube 8 of the impeller frame; a U-shaped inner clamp 2, which is arranged in the opening of the U-shaped outer clamp 1, and the opening of the U-shaped outer clamp 1 is opposite to the opening of the U-shaped inner clamp 2; the silicone rubber strip 3 is bent into a U shape, and the two ends of the silicone rubber strip 3 are respectively clamped between the U-shaped outer clamp 1 and the U-shaped inner clamp 2.

[0030] It is fixed to the square tube of the regeneration area of ​​the runner frame by M4X12 triangular thread screws (first screws 6), and high-temperature resistant sealant 9 is applied between the U-shaped outer clamp 1 and the square tube of the regeneration area of ​​the runner frame for compression and sealing; after the flat silicone rubber strip 3 is bent, the two ends are inserted between the U-shaped outer clamp 1 and the U-shaped inner clamp 2, and the silicone rubber strip 3 in the gap is clamped and fixed using M4X12 triangular thread screws (second screws 7) on both sides. After clamping and fixing, the gap is tightly filled with the sealing strip, so that the silicone rubber strip 3 will not loosen, be pulled or damaged when the runner rotates.

[0031] The ends of the polytetrafluoroethylene composite coating 5 are located between the U-shaped outer clamp 1 and the U-shaped inner clamp 2. The ends of the polytetrafluoroethylene membrane 4 are also located between the U-shaped outer clamp 1 and the U-shaped inner clamp 2. Bent outer ridges 11 are provided on both sides of the opening of the U-shaped outer clamp 1. The bent outer ridges 11 are flush with the end of the U-shaped inner clamp 2 away from the opening.

[0032] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in this field within the scope of the present invention are included in the patent scope of the present invention.

Claims

1. A rotary dehumidifier rotor sealing structure, characterized by: It includes a U-shaped outer clamp, which is arranged on the square tube of the runner frame; A U-shaped inner clip, the U-shaped inner clip being arranged in the opening of the U-shaped outer clip, the opening of the U-shaped outer clip being directly opposite to the opening of the U-shaped inner clip; A silicone rubber strip, wherein the silicone rubber strip is bent into a U-shape, and both ends of the silicone rubber strip are clamped between the U-shaped outer clamp and the U-shaped inner clamp, respectively, and a cavity is formed between the bent middle portion of the silicone rubber strip and the U-shaped inner clamp; The outer side of the silicone rubber strip is coated with a polytetrafluoroethylene composite coating; a polytetrafluoroethylene film is pasted on the outer side of the polytetrafluoroethylene composite coating; the polytetrafluoroethylene film is located outside the cavity, and the cavity is elastically compressed so that the polytetrafluoroethylene film is pressed tightly against the honeycomb surface of the runner.

2. The sealing structure according to claim 1, wherein: The polytetrafluoroethylene composite coating is strip-shaped, and both ends are respectively located between the U-shaped outer clip and the U-shaped inner clip; the two ends of the polytetrafluoroethylene film are also respectively located between the U-shaped outer clip and the U-shaped inner clip.

3. The sealing structure according to claim 1, wherein: The thickness of the polytetrafluoroethylene film is 0.18 mm; the thickness of the polytetrafluoroethylene composite coating is 0.22 mm.

4. The sealing structure according to any one of claims 1 to 3, characterized in that: A high-temperature resistant sealant is provided between the U-shaped outer clamp and the square tube of the runner frame.

5. The sealing structure according to any one of claims 1 to 3, characterized in that: Both sides of the U-shaped outer clip opening are respectively provided with bent outer edges; the bent outer edges are flush with the end of the U-shaped inner clip away from the opening thereof.

6. The sealing structure according to any one of claims 1 to 3, characterized in that: The U-shaped outer clamp is fixed to the square tube of the wheel frame by a first screw; the first screw is located in the opening of the U-shaped inner clamp.

7. The sealing structure according to any one of claims 1 to 3, characterized in that: The U-shaped outer clip and the U-shaped inner clip are fixedly connected together by a second screw.

8. The sealing structure according to claim 4, wherein: Both sides of the U-shaped outer clip opening are respectively provided with bent outer edges; the bent outer edges are flush with the end of the U-shaped inner clip away from the opening thereof.

9. The sealing structure according to claim 4, wherein: The U-shaped outer clamp is fixed to the square tube of the wheel frame by a first screw; the first screw is located in the opening of the U-shaped inner clamp.

10. The sealing structure according to claim 4, wherein: The U-shaped outer clip and the U-shaped inner clip are fixedly connected together by a second screw.

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