A sealing structure for between a shaft and a shaft cylinder

Abstract

The present invention provides a sealing structure for between a shaft and a shaft barrel, comprising a shaft and a shaft barrel. The shaft is arranged inside the shaft barrel and is coaxially arranged with the shaft barrel. A sealing assembly is provided at the port of the shaft barrel. The sealing assembly includes a columnar flange and packing. The columnar flange is made of nylon or Teflon. The columnar flange includes an integrally arranged columnar part and a flange part. The columnar part is a cylindrical structure provided with a through hole. The columnar part is sleeved between the shaft and the shaft barrel and is in interference fit with both of them. The packing is embedded in the columnar part and is located between the columnar part and the shaft. The flange part is a flange plate structure. The flange part is sleeved on the shaft and fixedly connected to the port of the shaft barrel. The flange part is in interference fit with the shaft. By providing a columnar flange with a special structure between the shaft and the shaft barrel to seal the shaft and the shaft barrel, not only the sealing between the shaft and the shaft barrel is achieved, but also the coaxiality between the shaft and the shaft barrel is ensured, reducing the empty occupancy ratio of the sealing structure while meeting the structural strength requirements.

Description

Technical Field

[0001] The present invention relates to the bearing sealing technology of a screw conveyor, and particularly to a sealing structure for between a shaft and a shaft cylinder. Background Art

[0002] A screw conveyor mainly consists of a shaft cylinder, a main shaft equipped with a screw, and a bearing stabilizer. In actual use, the main shaft of the screw conveyor needs to be coaxially arranged with the shaft cylinder. Between the shaft and the shaft cylinder, packing, bearings, flanges, etc. are used for sealed connection. However, due to various factors such as the machining and assembly of the shaft, after the screw conveyor is used for a period of time, the sealing effect between the shaft and the shaft cylinder will become worse and worse. The main reasons affecting the seal are the coaxial problem and the setting of the sealing structure. The prior art often uses bearings, gaskets, and flange plates to seal and connect the shaft and the shaft cylinder. This structure has a poor sealing effect and a short service life. Summary of the Invention

[0003] Aiming at the problems in the prior art, the present invention provides a sealing structure for between a shaft and a shaft cylinder.

[0004] A sealing structure for between a shaft and a shaft cylinder includes a shaft and a shaft cylinder. The shaft is arranged in the shaft cylinder and is coaxially set with the shaft cylinder. At the port of the shaft cylinder, a sealing assembly is provided. The sealing assembly includes a columnar flange and packing. The columnar flange is made of nylon or Teflon. The columnar flange includes an integrally provided columnar part and a flange part. The columnar part is a cylindrical structure with a through-hole. The columnar part is sleeved between the shaft and the shaft cylinder and has an interference fit with both. The packing is embedded in the columnar part and is located between the columnar part and the shaft. The flange part is a flange plate structure. The flange part is sleeved on the shaft and fixedly connected to the port of the shaft cylinder. The flange part has an interference fit with the shaft.

[0005] The working principle of the present invention: The columnar part is sleeved in the shaft cylinder, and the shaft is sleeved in the through-hole of the columnar part. Since the columnar part is a columnar structure and has an interference fit with the shaft cylinder and the shaft, the concentricity of the shaft and the shaft cylinder is ensured. Due to the expansibility and self-lubricity of nylon or Teflon, the sealing performance when the shaft rotates in the shaft cylinder is ensured.

[0006] Furthermore: At the position of the columnar part corresponding to the packing, a receiving groove matching the packing is provided. At the position of the flange part corresponding to the receiving groove, a counterbore is provided. The receiving groove is located in the middle of the counterbore. The packing is located in the receiving groove. A sealing plate is fixedly provided on the counterbore. The sealing plate is attached to and hermetically connected to the counterbore. The sealing plate blocks the packing. The sealing plate has the same material as the columnar flange. The sealing plate is sleeved on the shaft and has an interference fit with the shaft.

[0007] Further: A flange seat is fixedly installed on the flange portion. The shaft is sleeved in the flange seat. Screws are connected between the flange seat and the flange portion. The screws penetrate through the flange portion and are arranged in the columnar portion. The flange seat is used for installing a driving device.

[0008] Further: An annular fixing plate is provided at the port of the shaft cylinder. The fixing plate is fixedly arranged on the shaft cylinder and fixedly connected to the shaft cylinder. The edge of the flange portion is fixedly connected to the fixing plate through bolts.

[0009] Furthermore: Reinforcing rib plates are distributed along the fixing plate on the shaft cylinder. The reinforcing rib plates are fixedly connected to both the shaft cylinder and the fixing plate to strengthen the connection relationship between the fixing plate and the shaft cylinder.

[0010] Advantages of the present invention: By providing a columnar flange with a special structure between the shaft and the shaft cylinder to seal the shaft and the shaft cylinder, not only the sealing between the shaft and the shaft cylinder is achieved, but also the coaxiality between the shaft and the shaft cylinder is ensured. While meeting the structural strength, the empty occupancy ratio of the sealing structure is reduced; due to the thermal expansion of nylon, the sealing effect increases after the shaft rotates, ensuring better sealing effect of the present invention under the large load of the screw conveyor. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the present invention;

[0012] Figure 2 is Figure 1 an enlarged structural view of area A in

[0013] Figure 3 is a schematic structural diagram of the columnar flange in the present invention.

[0014] In the figure, 1, driving device; 2, shaft; 3, flange seat; 4, columnar flange; 41, sealing plate; 42, flange portion; 421, counterbore; 43, columnar portion; 431, accommodation groove; 44, through hole; 5, shaft cylinder; 51, fixing plate; 52, reinforcing rib plate; 6, packing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The present invention will be described in detail below with reference to the drawings. The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention. The orientation terms such as left, middle, right, up, and down in the embodiments of the present invention are only relative concepts to each other or are referenced based on the normal use state of the product and should not be considered restrictive.

[0016] A sealing structure between a shaft and a shaft cylinder, as shown in Figure 1 and Figure 2 shown, comprising a shaft 2 and a shaft cylinder 5. The shaft 2 is disposed within the shaft cylinder 5 and is coaxially arranged with the shaft cylinder 5. A sealing assembly is provided at the port of the shaft cylinder 5. The sealing assembly includes a columnar flange 4 and a packing 6. The columnar flange 4 is made of nylon or Teflon. The columnar flange 4 includes an integrally provided columnar portion 43 and a flange portion 42. The columnar portion 43 is a cylindrical structure provided with a through-hole 44. The columnar portion 43 is sleeved between the shaft 2 and the shaft cylinder 5 and is in interference fit with both. The shaft 2 is located within the through-hole 44 of the columnar portion 43. The packing 6 is embedded within the columnar portion 43 and is located at the position between the columnar portion 43 and the shaft 2. The flange portion 42 is a flange plate structure. The flange portion 42 is sleeved on the shaft 2 and fixedly connected to the port of the shaft cylinder 5. The flange portion 42 is in interference fit with the shaft 2. When machining the columnar flange, the nylon plate is turned as a whole, and the overall structure of the columnar flange is turned out, thereby realizing the integral setting of the columnar portion and the flange portion.

[0017] Among them, as shown in Figure 3 shown, a receiving groove 431 matching the packing 6 is provided at the position of the columnar portion 43 corresponding to the packing 6. A counterbore 421 is provided at the position of the flange portion 42 corresponding to the receiving groove 431. The receiving groove 431 is located in the middle of the counterbore 421. The packing 6 is located within the receiving groove 431. A sealing plate 41 is fixedly provided on the counterbore 421. The sealing plate 41 is attached to and sealingly connected to the counterbore 421. The sealing plate 41 abuts against the packing 6. The sealing plate 41 is made of the same material as the columnar flange 4. The sealing plate 41 is sleeved on the shaft 2 and is in interference fit with the shaft 2. A flange seat 3 is fixedly installed on the flange portion 42. The shaft 2 is loosely sleeved within the flange seat 3. A screw is connected between the flange seat 3 and the flange portion 42. The screw passes through the flange portion 42 and then penetrates into the columnar portion 43. The flange seat 3 is used to install the driving device 1. An annular fixing plate 51 is provided at the port of the shaft cylinder 5. The fixing plate 51 is fixedly provided on the shaft cylinder 5 and is fixedly connected to the shaft cylinder 5. The edge of the flange portion 42 is fixedly connected to the fixing plate 51 by bolts. Reinforcing rib plates 52 are distributed on the shaft cylinder 5 along the fixing plate 51. The reinforcing rib plates 52 are fixedly connected to both the shaft cylinder 5 and the fixing plate 51.

[0018] The working principle of the present invention: The columnar portion is sleeved in the shaft cylinder, and the shaft is sleeved in the through-hole of the columnar portion. Since the columnar portion is a columnar structure and is in interference fit with the shaft cylinder and the shaft, the concentricity between the shaft and the shaft cylinder is ensured. Due to the expansibility and self-lubricity of nylon or Teflon, the sealing performance when the shaft rotates in the shaft cylinder is ensured.

[0019] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A sealing structure between a shaft and a shaft sleeve, comprising a shaft and a shaft sleeve, the shaft is arranged in the shaft sleeve and coaxially arranged with the shaft sleeve, and a sealing component is arranged at the port of the shaft sleeve, and is characterized in that: The sealing assembly includes a cylindrical flange and packing. The cylindrical flange is made of nylon or Teflon. The cylindrical flange includes an integrally provided cylindrical part and a flange part. The cylindrical part is a cylindrical structure with a through hole. The cylindrical part is sleeved between the shaft and the shaft cylinder and is in interference fit with both. The packing is embedded in the cylindrical part and is located between the cylindrical part and the shaft. The flange part is a flange plate structure. The flange part is sleeved on the shaft and fixedly connected to the port of the shaft cylinder. The flange part is in interference fit with the shaft. At a position of the cylindrical part corresponding to the packing, a receiving groove matching the packing is provided. At a position of the flange part corresponding to the receiving groove, a counterbore is provided. The receiving groove is located in the middle of the counterbore. The packing is located in the receiving groove. A sealing plate is fixedly provided on the counterbore. The sealing plate is attached to and sealingly connected to the counterbore. The sealing plate blocks the packing. The sealing plate is made of the same material as the cylindrical flange. The sealing plate is sleeved on the shaft and is in interference fit with the shaft. A flange seat is fixedly installed on the flange part. The shaft is loosely sleeved in the flange seat. A screw is connected between the flange seat and the flange part. The screw passes through the flange part and is inserted into the cylindrical part.

2. A sealing structure between a shaft and a shaft cylinder according to claim 1, characterized in that: An annular fixing plate is provided on the port of the shaft cylinder. The fixing plate is fixedly provided on the shaft cylinder and is fixedly connected to the shaft cylinder. The edge of the flange part is fixedly connected to the fixing plate by bolts.

3. The sealing structure for between a shaft and a shaft cylinder according to claim 2, characterized in that: Reinforcing rib plates are distributed on the shaft cylinder along the fixing plate. The reinforcing rib plates are fixedly connected to both the shaft cylinder and the fixing plate.

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