Mechanical shaft sealing shaft sleeve

Abstract

The utility model belongs to the technical field of mechanical sealing, and particularly relates to a mechanical shaft sealing shaft sleeve which comprises a transmission shaft and a sealing ring sleeved on the transmission shaft, a matching ring and an exhaust hole are arranged on the sealing ring, a gland is sleeved below the sealing ring, a sealing gasket is sleeved above the sealing ring, and the top surface of the sealing ring and the bottom surface of the matching ring are positioned on the same plane. The outer surface of the matching ring is sleeved with a sealing plate, the outer surface of the sealing plate and the outer surface of the sealing gasket are sleeved with two sealing shells, and air inlet holes are formed in the sealing shells. By means of the structural arrangement, the mechanical shaft sealing shaft sleeve is simple in structure, convenient to install and maintain, resistant to high temperature, not prone to abrasion and capable of meeting the requirement for continuous production of products such as modified starch.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical seal technology, specifically a mechanical shaft sealing bushing. Background Technology

[0002] Modified starch is a type of starch that has undergone modification. Based on the inherent properties of natural starch, it is treated using physical, chemical, or enzymatic methods to improve its performance and expand its applications. This involves introducing new functional groups into the starch molecules or altering the size of the starch molecules and the properties of the starch granules, thereby changing the natural characteristics of the starch (such as gelatinization temperature, thermal viscosity and its stability, freeze-thaw stability, gelling power, film-forming properties, and transparency) to better suit the requirements of specific applications. This type of starch, which has undergone secondary processing and had its properties altered, is collectively referred to as modified starch.

[0003] The mechanical shaft seal bushings of various rotating equipment in the production process of modified starch have many problems, such as: conventional mechanical seal devices have many parts, all of which need to be installed on the rotating shaft, which is extremely inconvenient to use, requires a lot of disassembly and assembly work, has a high maintenance labor intensity, long repair time, and increases production costs; dust often clogs the elastic elements, causing them to lose their elasticity and fail to work properly; the internal rubber parts are not resistant to high temperatures and are easily worn, causing leakage and material leakage, resulting in material waste and ultimately leading to discontinuous production and affecting production efficiency. Therefore, the existing shaft seal design cannot meet the needs of continuous production of modified starch and other products. Utility Model Content

[0004] The purpose of this utility model is to provide a mechanical shaft sealing bushing, which aims to solve the technical problems of existing sealing bushings having complex structures, being easily damaged, and being unable to meet the needs of continuous production of products such as modified starch.

[0005] To achieve the above objectives, this utility model provides a mechanical shaft sealing bushing, comprising: a drive shaft; a sealing ring sleeved on the drive shaft; a mating ring at the top of the sealing ring and an exhaust hole at the bottom; a pressure cap sleeved on the lower outer surface of the sealing ring, and a baffle plate fixedly disposed above the pressure cap; a sealing gasket sleeved on the top of the sealing ring, with the top surface of the sealing ring and the bottom surface of the mating ring on the same plane; a sealing plate sleeved on the outer surface of the mating ring, and a limiting plate sleeved on the outer surface of the sealing plate; and two sealing shells sleeved on the outer surfaces of the sealing plate and the sealing gasket, each sealing shell having an air inlet hole, and a baffle plate and a groove fixedly disposed on the inner surface of the sealing shell.

[0006] Preferably, the lower surface of the limiting plate is at a higher height than the lower surface of the sealing plate. More preferably, the limiting plate and the sealing plate are an integral structure.

[0007] Preferably, the inner surface of the sealing gasket is in close contact with the outer surface of the sealing ring, and the outer surface is in close contact with the inner surface of the sealing shell. Preferably, the sealing gasket is made of copper.

[0008] Preferably, there are two sealing shells, which are semi-circular tile-shaped structures, and the two semi-circular tile-shaped structures form an annular structure. A baffle and a groove are fixedly fitted on the inner surface of the sealing shell.

[0009] Preferably, the baffle is annular, and there are gaps between the top surface of the baffle and the bottom surface of the sealing gasket, and between the bottom surface of the baffle and the top surface of the gland. There is also a gap between the inner surface of the baffle and the outer surface of the sealing ring. Preferably, the baffle and the sealing shell are an integral structure.

[0010] Preferably, the groove is annular and located at the bottom of the inner side of the sealing housing.

[0011] Preferably, the second baffle is an annular structure with the same height as the groove, and the distance between the inner surface of the second baffle and the outer surface of the sealing ring is the same as the gap between the inner surface of the first baffle and the outer surface of the sealing ring. Preferably, the second baffle and the cover are an integral structure.

[0012] The above-mentioned technical solutions in a mechanical shaft sealing bushing provided by this utility model embodiment have at least one of the following technical effects:

[0013] The sealing bushing of this utility model consists of a sealing plate, a sealing gasket, a sealing ring, a sealing shell, and a pressure cap. This makes the sealing bushing resistant to high temperatures and not easily worn. At the same time, it has a simple structure and is easy to install. The arrangement of two sealing shells makes it easier to maintain and care for the sealing bushing, which can meet the needs of continuous production of products such as modified starch. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A front view of the modified starch crushing device in its assembled state according to an embodiment of this utility model.

[0016] Figure 2 For along Figure 1 Sectional view along line AA in the middle.

[0017] Figure 3Left view of the modified starch crushing device in its unfolded state, as provided in an embodiment of this utility model.

[0018] Figure 4 For along Figure 2 Sectional view of the middle BB line

[0019] The following are the labeling elements in the figure:

[0020] 10—Drive shaft; 20—Sealing plate; 21—First screw hole; 22—Limiting plate

[0021] 23—Second screw hole; 30—Sealing gasket; 40—Sealing ring; 41—Matching ring

[0022] 42—Third screw hole; 43—Exhaust hole; 50—Sealed outer casing; 51—Baffle plate.

[0023] 52—Groove; 53—Air Inlet; 54—Fourth Screw Hole; 60—Cap

[0024] 61—Baffle Two. Detailed Implementation

[0025] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0026] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0029] In one embodiment of this utility model, such as Figures 1-4 As shown, a mechanical shaft sealing bushing is provided, including a drive shaft 10, a sealing plate 20, a sealing gasket 30, a sealing ring 40, a sealing housing 50, and a gland 60;

[0030] The sealing plate 20, sealing gasket 30, sealing ring 40, and pressure cap 60 are all annular metal structures. The bottom of the sealing plate 20 is in contact with the top of the sealing gasket 30 and the sealing ring 40, and the sealing plate 20 is fitted onto the outer surface of the mating ring 41 above the sealing ring 40. The inner surface of the sealing plate 20 is in contact with the outer surface of the mating ring 41. The sealing gasket 30 is fitted onto the outer surface of the sealing ring 40, and the length of the sealing gasket 30 is shorter than the length of the sealing ring 40 and the sealing shell 50, so as to form a cavity under the enclosure of the sealing gasket 30, sealing ring 40, sealing shell 50, and pressure cap 60. Preferably, the sealing gasket 30 is made of copper, and the length of the sealing gasket 30 is one-third of the length of the sealing shell 50. The sealing ring 40 is fitted onto the outer surface of the drive shaft 10, and the inner diameter of the sealing ring 40 is slightly larger than the outer diameter of the drive shaft 10, so that the drive shaft 10 can rotate without being affected by the sealing ring 40. Preferably, the sealing ring 40 is made of copper. There are two sealing shells 50, each with a semi-circular tile-like structure, forming a ring-shaped metal structure. The top of the sealing shell 50 is fitted with the bottom of the limiting plate 22 surrounding the sealing plate 20, and the bottom is fitted with the top of the pressure cap 60. Inside the sealing shell 50, from top to bottom, are respectively fitted the sealing plate 20, the sealing gasket 30, the sealing ring 40, and the pressure cap 60. The inner surface of the sealing shell 50 is fitted with the outer surface of the sealing gasket 30 and the outer surface of the baffle 61 on the pressure cap 60. The pressure cap 60 is fitted onto the outer surface of the sealing ring 40, and the inner surface of the pressure cap 60 is fitted with the outer surface of the sealing ring 40.

[0031] The sealing plate 20 is provided with a first screw hole 21, a limiting plate 22, and a second screw hole 23;

[0032] There are multiple first screw holes 21, which are arranged perpendicular to the drive shaft 10 and are evenly distributed through the upper half of the sealing plate 20. The first screw holes 21 cooperate with the third screw hole 42 to help fix the sealing ring 40 under the action of the screw (not shown).

[0033] The limiting plate 22 is sleeved on the outer surface of the sealing plate 20 and located below the first screw hole 21. The lower surface of the limiting plate 22 is at a higher height than the lower surface of the sealing plate 20. Preferably, the limiting plate 22 and the sealing plate 20 are integral structures. The limiting plate 22 is provided with a plurality of second screw holes 23 evenly parallel to the drive shaft 10. The limiting plate 22 serves to fix the sealing plate 20 and the sealing shell 50 together with screws (not shown) through the cooperation of the second screw holes 23. At the same time, it also helps the sealing plate 20 to connect the sealing plate 20 and the sealing shell 50 more tightly.

[0034] The sealing ring 40 is provided with a mating ring 41 and an exhaust hole 43.

[0035] The mating ring 41 is positioned above the sealing ring 40. The thickness of the mating ring 41 is less than that of the sealing ring 40, and the inner surface of the mating ring 41 is on the same curved surface as the inner surface of the sealing ring 40. The outer surface of the mating ring 41 is fitted with a sealing plate 20 and is in contact with the inner surface of the sealing plate 20. The mating ring 41 is provided with a plurality of third screw holes 42 evenly arranged perpendicular to the drive shaft 10, and the third screw holes 42 are coaxially arranged with the first screw hole 21. The mating ring 41 serves to tightly connect and fix the sealing plate 20 and the sealing ring 40 by engaging the first screw hole 21, the third screw hole 42, and a screw (not shown).

[0036] There are multiple exhaust holes 43, which are evenly arranged around the sealing ring 40 and perpendicular to the drive shaft 10. They are located near the bottom of the sealing ring 40. Preferably, there are four exhaust holes. The exhaust holes 43 serve to discharge gas into the gap between the sealing ring 40 and the drive shaft 10.

[0037] The sealed outer shell 50 is provided with a baffle 51, a groove 52, an air inlet 53, and a fourth screw hole 54.

[0038] The sealing housing 50 has a second screw hole 23 that is coaxial with the second screw hole 23 on the sealing plate 20.

[0039] The baffle 51 is annular and is fitted onto the inner surface of the sealing shell 50. There is a certain distance between the top surface of the baffle 51 and the bottom surface of the sealing gasket 30, and between the bottom surface of the baffle 51 and the top surface of the pressure cap 60. There is also a certain gap between the inner surface of the baffle 51 and the outer surface of the sealing ring 40. Preferably, the baffle 51 and the sealing shell 50 are an integral structure.

[0040] The groove 52 is annular and located at the bottom of the inner side of the sealing shell 50. The groove 52 cooperates with the baffle to make the sealing shell 50 and the pressure cover 60 tightly connected.

[0041] The air inlet 53 is perpendicular to the drive shaft 10, passes through one of the sealed housings 50, and corresponds to the cavity formed by the top surface of the baffle 51 and the bottom surface of the sealing gasket 30.

[0042] The fourth screw hole 54 is provided at both ends where the two sealing shells 50 meet, and the fourth screw hole 54 serves to tightly connect the two sealing shells 50 with the help of screws (not shown).

[0043] The pressure cap 60 has a second screw hole 23 that is coaxial with the second screw hole 23 on the sealing plate 20 and the sealing shell 50.

[0044] A second baffle 61 is fixedly sleeved above the pressure cap 60. The second baffle 61 has an annular structure and its height is the same as that of the groove 52. The outer surface and top of the second baffle 61 are embedded in the groove 52, and the distance between the inner surface of the second baffle 61 and the sealing ring 40 is the same as the distance between the first baffle 51 and the sealing ring 40. Preferably, the second baffle 61 and the pressure cap 60 are an integral structure.

[0045] The working principle of this utility model is as follows: A mechanical shaft sealing bushing, wherein the sealing ring 40 is sleeved on the transmission shaft 10, and the mating ring 41 on the sealing ring 40 is located above it; the pressure cap 60 is sleeved below the sealing ring 40; the sealing gasket 30 is sleeved above the sealing ring 40, and the top surface of the sealing ring 30 and the bottom surface of the mating ring 41 are on the same plane; the sealing plate 20 is sleeved on the mating ring 41; and the two sealing shells 50 are sleeved on the sealing plate 20, the sealing gasket 30, and the second baffle 61. The first screw hole 21 and the third screw hole 42, under the tightening of the screws, tightly fix the sealing plate 20 and the sealing ring 40; and the second screw hole 23 on the sealing plate 20, the sealing shell 50, and the pressure cap 60, under the tightening of the screws, tightly fixes the sealing plate 20, the sealing shell 50, and the pressure cap 60. When the mechanical shaft sealing sleeve starts working, the gas medium enters the cavity enclosed by the sealing gasket 30, sealing ring 40, sealing shell 50, and pressure cap 60 through the air inlet 53. The gas passes through the cavity above the first baffle 51, through the gap between the first baffle 51 and the sealing ring 40, and enters the cavity below the first baffle 51. Then, it passes through the gap between the second baffle 61 and the sealing ring 40 and enters the exhaust hole 43. The gas medium enters the gap between the sealing ring 40 and the drive shaft 10 through the exhaust hole. Under the action of the first baffle 51, the air pressure in the cavity above the first baffle 51 is greater than the air pressure below the first baffle 51, and the air pressure between the second baffle 61 and the sealing ring 40 is greater than the air pressure in the exhaust hole 43. This prevents dust from entering the sealing sleeve and prevents internal blockage. At the same time, this mechanical shaft sealing sleeve has a simple structure, is easy to install and maintain, is resistant to high temperature, and is not easily worn, which can meet the needs of continuous production of modified starch and other products.

[0046] The rest of this embodiment is the same as that in Embodiment 1. Features not explained in this embodiment are explained using the methods in Embodiment 1, and will not be repeated here.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mechanical shaft sealing sleeve, characterized in that: The device includes a drive shaft and a sealing ring fitted on the drive shaft. The sealing ring has a mating ring at the top and an exhaust hole at the bottom. A pressure cap is fitted on the outer surface of the sealing ring below, and a baffle plate is provided above the pressure cap. A sealing gasket is fitted on the top of the sealing ring, and the top surface of the sealing ring and the bottom surface of the mating ring are on the same plane. A sealing plate is fitted on the outer surface of the mating ring, and a limiting plate is fitted on the outer surface of the sealing plate. Two sealing shells are fitted on the outer surfaces of the sealing plate and the sealing gasket. The sealing shells have air inlets, and a baffle plate and a groove are fixedly provided on the inner surface of the sealing shells.

2. The mechanical shaft sealing sleeve according to claim 1, characterized in that: The lower surface of the limiting plate is at a higher height than the lower surface of the sealing plate, and the limiting plate and the sealing plate are an integral structure.

3. The mechanical shaft sealing sleeve according to claim 1, characterized in that: The inner surface of the sealing gasket is in close contact with the outer surface of the sealing ring, and the outer surface is in close contact with the inner surface of the sealing shell.

4. A mechanical shaft sealing sleeve according to claim 1, characterized in that: The sealing shell has two parts, which are semi-circular tile-shaped structures, and the two semi-circular tile-shaped structures form a ring structure. A baffle and a groove are fixedly fitted on the inner surface of the sealing shell.

5. A mechanical shaft sealing sleeve according to claim 4, characterized in that: The first baffle is annular, and there are gaps between the top surface of the first baffle and the bottom surface of the sealing gasket, and between the bottom surface of the first baffle and the top surface of the pressure cap. There is also a gap between the inner surface of the first baffle and the outer surface of the sealing ring. The first baffle and the sealing shell are an integral structure.

6. A mechanical shaft sealing bushing according to claim 4, characterized in that: The groove is annular and located at the bottom of the inner side of the sealed outer casing.

7. A mechanical shaft sealing sleeve according to claim 1, characterized in that: The second baffle is an annular structure with the same height as the groove. The distance between the inner surface of the second baffle and the outer surface of the sealing ring is the same as the gap between the inner surface of the first baffle and the outer surface of the sealing ring. The second baffle and the cover are an integral structure.

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