Omnibearing elastic multi-layer sealing assembly

Abstract

The utility model discloses an all-dimensional elastic multi-layer sealing assembly, which relates to the technical field of sealing structures and comprises a rear sealing gasket, a double-groove gasket, an inner side sealing ring, a front sealing gasket and a front sealing baffle which are sequentially sleeved on a main transmission shaft in a matching manner from back to front, the outer side sealing ring is sleeved with an annular outer groove formed in the outer edge of the double-groove gasket in a matched mode, an annular inner groove is formed in the inner edge of the front end face of the double groove, and the inner side sealing ring is clamped in the inner groove in a matched mode; the front sealing baffle is fixedly installed on the machine body. A multi-layer sealing assembly structure is adopted, the hard double-groove gasket plays a supporting and fixing role and is matched with the flexible rear sealing gasket, the inner side sealing ring and the front sealing gasket, sealing installation between the vacuum damping machine body and the main transmission shaft is achieved, the problem of air leakage at the connecting position of the vacuum damping machine main transmission shaft and the machine body is effectively solved, and the service life of the vacuum damping machine is prolonged. And the shortening of the tobacco leaf vacuum moisture regaining treatment working period and the improvement of the productivity are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of sealing structure technology, specifically to a structure for sealing the connection between the body of a vacuum rehumidifier and the main drive shaft. Background Technology

[0002] Vacuum rehumidification of tobacco leaves is a process that uses a vacuum rehumidification machine to appropriately increase the temperature and moisture content of the tobacco leaves. Vacuum rehumidification of tobacco leaves can remove the green and off-flavors of the tobacco leaves, loosen the tobacco leaves, and kill insect eggs in the tobacco leaves, providing high-quality tobacco leaf raw materials for downstream processes.

[0003] The vacuum rehumidification of tobacco leaves should be carried out in a working environment of vacuum, high temperature and high humidity. The vacuum pumping and pressure holding of the vacuum rehumidifier are the basis for maintaining the vacuum environment required for the vacuum rehumidification of tobacco leaves, and can directly determine the effect and efficiency of the vacuum rehumidification of tobacco leaves.

[0004] In existing vacuum rehumidifiers, the main drive shaft is rotatably connected to the machine body via bearings. The sealing between the main drive shaft and the machine body relies on a sealing baffle covering the opening of the machine body and a conical seal that fits between the bearing and the sealing baffle and is fitted onto the main drive shaft. However, because the main drive shaft is constantly rotating during operation, the conical seal is prone to wear. The high temperature and high pressure environment can also cause corrosion damage to the seal, leading to seal failure between the main drive shaft and the machine body and air leakage. This affects the formation and maintenance of the vacuum environment inside the vacuum rehumidifier, significantly prolonging the vacuuming time during the tobacco vacuum rehumidification process, or even preventing the formation of a vacuum environment and causing production stoppage. This disrupts the normal operation of the tobacco vacuum rehumidification process and may even lead to major equipment failures and significant safety hazards. Utility Model Content

[0005] This invention aims to overcome the shortcomings of the existing technology by providing a comprehensive, flexible, multi-layered sealing component.

[0006] The present invention adopts the following technical solution to solve the technical problem: an all-round elastic multi-layer sealing assembly, wherein the main drive shaft is rotatably connected to the body of the vacuum rehumidifier through bearings, and its front end extends out of the body and is connected to the drive shaft; the rear sealing baffle is fitted on the main drive shaft, covering the opening of the body and fixed to the body, and includes a rear sealing gasket, an outer sealing ring, a double groove gasket, an inner sealing ring, a front sealing gasket, and a front sealing baffle, all of which are annular.

[0007] The outer edge of the double groove gasket has an annular outer groove, and the inner edge of the front end face has an annular inner groove. The inner sealing ring is fitted and locked in the inner groove, and the outer sealing ring is fitted and sleeved in the outer groove.

[0008] The rear sealing gasket, the double groove gasket, the inner sealing ring, the front sealing gasket, and the front sealing baffle are sequentially fitted onto the main drive shaft from back to front. The front sealing baffle is installed and fixed to the machine body, thereby sealing and pressing the rear sealing gasket, the double groove gasket, the inner sealing ring, and the front sealing gasket in sequence.

[0009] Furthermore, at least one of the front end face of the rear sealing baffle and the rear end face of the front sealing baffle has a groove forming a cavity, and the rear sealing gasket, the outer sealing ring, the double groove gasket, the inner sealing ring and the front sealing gasket are fitted together and installed in the cavity.

[0010] Furthermore, the double-groove gasket is a rigid gasket, while the rear sealing gasket, the outer sealing ring, the inner sealing ring, and the front sealing gasket are flexible gaskets.

[0011] Furthermore, the outer sealing ring is made of nitrile rubber.

[0012] Furthermore, the double-groove gasket is made of 446 stainless steel.

[0013] Furthermore, the rear sealing gasket, the inner sealing ring, and the front sealing gasket are made of EPDM rubber.

[0014] Furthermore, the rear sealing baffle has four front baffle mounting holes and four rear baffle mounting holes evenly and alternately distributed. The rear sealing baffle is fixed to the machine body by bolts located at the four rear baffle mounting holes. The front sealing baffle has four connecting holes corresponding to the four front baffle mounting holes. The front sealing baffle is fixed to the machine body at the four connecting holes by bolts passing through the four front baffle mounting holes respectively.

[0015] Furthermore, the rear baffle mounting hole is a countersunk hole, and the bolt installed at the rear baffle mounting hole is a countersunk bolt.

[0016] Furthermore, the bolts installed at the mounting holes of the rear baffle are countersunk hexagonal head bolts.

[0017] This utility model provides an all-around elastic multi-layer sealing component, which has the following beneficial effects:

[0018] This invention employs a multi-layered sealing component structure. The rigid double-groove gasket in the middle provides good support and shaping. The outer groove and outer sealing ring are designed to provide a certain degree of flexibility for the double-groove gasket, ensuring that the flexible rear and front sealing gaskets maintain a tight seal with the rear and front sealing baffles. The inner groove and inner sealing ring improve the sealing performance between the main drive shaft and the double-groove gasket, effectively solving the problem of air leakage at the connection between the main drive shaft and the machine body of the vacuum rehumidifier. This facilitates a shorter working cycle and increased production capacity for the vacuum rehumidification of tobacco leaves. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the exploded structure of this utility model;

[0020] Figure 2 This is a partial cross-sectional view of the assembly structure of the double-groove gasket, outer sealing ring, and inner sealing ring of this utility model.

[0021] Figure 3 This is a schematic diagram of the structure of the double-groove washer of this utility model.

[0022] In the picture:

[0023] 1. Machine body; 2. Main drive shaft; 3. Rear sealing baffle; 4. Rear sealing gasket; 5. Outer sealing ring; 6. Double groove gasket, 61. Outer groove, 62. Inner groove; 7. Inner sealing ring; 8. Front sealing gasket; 9. Front sealing baffle. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] A multi-layered, flexible sealing component, such as Figures 1-3 As shown, the structural relationship is as follows: the main drive shaft 2 is rotatably connected to the body 1 of the vacuum rehumidifier through bearings, and its front end extends out of the body 1 and is connected to the drive shaft; the rear sealing baffle 3 is fitted on the main drive shaft 2, covering the opening of the body 1, and is fixed to the body 1, including the rear sealing gasket 4, outer sealing ring 5, double groove gasket 6, inner sealing ring 7, front sealing gasket 8 and front sealing baffle 9, all of which are annular.

[0026] The outer edge of the double groove gasket 6 has an annular outer groove 61, and the inner edge of the front end face has an annular inner groove 62. The inner sealing ring 7 is fitted and locked in the inner groove 62, and the outer sealing ring 5 is fitted and sleeved in the outer groove 61.

[0027] The rear sealing gasket 4, double groove gasket 6, inner sealing ring 7, front sealing gasket 8 and front sealing baffle 9 are sequentially fitted onto the main drive shaft 2 from back to front. The front sealing baffle 9 is installed and fixed to the machine body 1, and the rear sealing gasket 4, double groove gasket 6, inner sealing ring 7 and front sealing gasket 8 are sequentially sealed and pressed together.

[0028] Preferably, at least one of the front end face of the rear sealing baffle 3 and the rear end face of the front sealing baffle 9 is provided with a groove to form a cavity, and the rear sealing gasket 4, the outer sealing ring 5, the double groove gasket 6, the inner sealing ring 7 and the front sealing gasket 8 are fitted together and installed in the cavity.

[0029] Preferably, the double-groove gasket 6 is a rigid gasket, while the rear sealing gasket 4, outer sealing ring 5, inner sealing ring 7, and front sealing gasket 8 are flexible gaskets.

[0030] In actual installation, the materials of the rear sealing gasket 4, outer sealing ring 5, double groove gasket 6, inner sealing ring 7, and front sealing gasket 8 should also have good wear resistance, high temperature resistance, and corrosion resistance.

[0031] Preferably, the outer sealing ring 5 is made of nitrile rubber.

[0032] Preferably, the double groove washer 6 is made of 446 stainless steel.

[0033] Preferably, the rear sealing gasket 4, the inner sealing ring 7, and the front sealing gasket 8 are made of EPDM rubber.

[0034] Preferably, the rear sealing baffle 3 has four front baffle mounting holes and four rear baffle mounting holes evenly distributed and staggered. The rear sealing baffle 3 is installed and fixed to the machine body 1 by bolts located at the four rear baffle mounting holes. The front sealing baffle 9 has four connecting holes corresponding to the four front baffle mounting holes. The front sealing baffle 9 is installed and fixed to the machine body 1 at the four connecting holes by bolts passing through the four front baffle mounting holes respectively.

[0035] Preferably, the rear baffle mounting hole is a countersunk hole, and the bolt installed at the rear baffle mounting hole is a countersunk bolt.

[0036] Preferably, the bolts installed at the rear panel mounting holes are countersunk head hex bolts.

[0037] Vacuum rehumidification of sheet tobacco was performed using vacuum rehumidification machines employing the aforementioned all-around elastic multi-layer sealing components and those employing existing conical seals. The process cycle, process performance, and process time are compared in Table 1 below. Vacuuming cycle, sealing performance, and energy efficiency are shown in Table 2 below.

[0038]

[0039] Table 1

[0040] As shown in Table 1, compared with the vacuum rehumidifier that uses the existing conical seal, the vacuum rehumidifier using the above-mentioned sealing components solves the leakage problem between the machine body 1 and the main drive shaft 2, reduces the process cycle from 410-435 seconds to 357-385 seconds, optimizes process performance, improves energy utilization, and increases production capacity.

[0041]

[0042] Table 2

[0043] As shown in Table 2, compared with the vacuum rehumidifier that uses the above-mentioned sealing components, the vacuum rehumidifier that uses the existing conical seal solves the leakage problem between the machine body 1 and the main drive shaft 2, and reduces the vacuuming time from 120 seconds to 80 seconds, effectively saving the vacuuming process time and ensuring the stability of the process performance during the vacuum rehumidification process.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multi-layered, all-around elastic sealing assembly, wherein a main drive shaft (2) is rotatably connected to the body (1) of a vacuum rehumidifier via bearings, with its front end extending outside the body (1) and shaft-connected to a drive motor; a rear sealing baffle (3) is fitted onto the main drive shaft (2), covering the opening of the body (1), and is fixedly installed with the body (1), characterized in that: It includes a rear sealing gasket (4) that is all in the shape of a ring, an outer sealing ring (5), a double groove gasket (6), an inner sealing ring (7), a front sealing gasket (8), and a front sealing baffle (9). The outer edge of the double groove gasket (6) has an annular outer groove (61), and the inner edge of the front end face has an annular inner groove (62). The inner sealing ring (7) is fitted in the inner groove (62), and the outer sealing ring (5) is fitted in the outer groove (61). The rear sealing gasket (4), the double groove gasket (6), the inner sealing ring (7), the front sealing gasket (8), and the front sealing baffle (9) are sequentially fitted onto the main drive shaft (2) from back to front. The front sealing baffle (9) is installed and fixed to the machine body (1), and the rear sealing gasket (4), the double groove gasket (6), the inner sealing ring (7), and the front sealing gasket (8) are sequentially sealed and pressed together.

2. The all-around elastic multi-layer sealing assembly according to claim 1, characterized in that: At least one of the front end face of the rear sealing baffle (3) and the rear end face of the front sealing baffle (9) is provided with a groove to form a cavity, and the rear sealing gasket (4), the outer sealing ring (5), the double groove gasket (6), the inner sealing ring (7) and the front sealing gasket (8) are fitted together and installed in the cavity.

3. The all-around elastic multi-layer sealing assembly according to claim 1, characterized in that: The double-groove gasket (6) is a rigid gasket, while the rear sealing gasket (4), the outer sealing ring (5), the inner sealing ring (7), and the front sealing gasket (8) are flexible gaskets.

4. The all-around elastic multi-layer sealing assembly according to claim 3, characterized in that: The outer sealing ring (5) is made of nitrile rubber.

5. The all-around elastic multi-layer sealing assembly according to claim 3, characterized in that: The double-groove gasket (6) is made of 446 stainless steel.

6. The all-around elastic multi-layer sealing assembly according to claim 3, characterized in that: The rear sealing gasket (4), the inner sealing ring (7), and the front sealing gasket (8) are made of EPDM rubber.

7. The all-around elastic multi-layer sealing assembly according to claim 1, characterized in that: The rear sealing baffle (3) has four front baffle mounting holes and four rear baffle mounting holes evenly distributed and staggered. The rear sealing baffle (3) is fixed to the body (1) by bolts located at the four rear baffle mounting holes. The front sealing baffle (9) has four connecting holes corresponding to the four front baffle mounting holes. The front sealing baffle (9) is fixed to the body (1) at the four connecting holes by bolts passing through the four front baffle mounting holes respectively.

8. The all-around elastic multi-layer sealing assembly according to claim 7, characterized in that: The rear baffle mounting hole is a countersunk hole, and the bolt installed at the rear baffle mounting hole is a countersunk bolt.

9. The all-around elastic multi-layer sealing assembly according to claim 8, characterized in that: The bolts installed at the mounting holes of the rear baffle are countersunk hex bolts.

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