Shaft end sealing structure of pipe chain machine

Abstract

The utility model discloses a shaft end sealing structure of a tubular chain machine, which comprises a shell, and a tubular chain machine transmission wheel is arranged in the shell. The main shaft transversely penetrates through the shell, and the pipe chain machine transmission wheel is arranged on the main shaft in a sleeving manner; the bearing seats are installed on the two sides of the shell and arranged on the main shaft in a sleeving mode, and at least one bearing is installed between the interior of each bearing seat and the main shaft; at least one axial sealing piece is axially installed on the side, close to the shell, of the interior of the bearing seat, an inflation inlet is formed in the side wall of the bearing seat, the space between the bearing seat and the main shaft is filled with helium, solid antioxidant dust can be blocked outside a sealing cavity of the bearing seat by arranging the axial sealing piece, and therefore the solid antioxidant dust can be prevented from entering the sealing cavity of the bearing seat. Meanwhile, nitrogen is introduced into the sealing cavity of the bearing seat, so that the pressure of the sealing cavity is higher than that of the conveying end of the pipe chain machine, and the solid antioxidant dust cannot enter the sealing cavity of the bearing seat.

Description

Technical Field

[0001] The utility model relates to the technical field of solid antioxidant tube chain machine transmission shaft sealing, in particular to a tube chain machine shaft end sealing structure. Background Art

[0002] In order to delay or prevent oxidation, the finished petroleum resin product needs to be added with antioxidants before the product is formed. In order to deliver the powdered solid antioxidant to the top of the melting tank, a tube chain machine is configured. The existing tube chain machine transmission shaft seal uses traditional sealing packing to achieve sealing. This sealing method is not reliable in the use of the tube chain machine, causing solid antioxidant powder to enter the bearing seat, causing the bearing to wear and jam. At the same time, due to the use of packing seals, long-term operation also causes certain wear on the shaft, and the service life is not long. Utility Model Content

[0003] The utility model provides a shaft end sealing structure of a tube chain machine, which can solve the problems of the existing sealing structure that the bearing is easily worn and stuck and the service life is short.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a shaft end sealing structure of a tube chain machine, comprising a shell, a tube chain machine transmission wheel is arranged inside the shell; a main shaft passes through the shell horizontally, and the tube chain machine transmission wheel is sleeved on the main shaft; a bearing seat is installed on both sides of the shell and sleeved on the main shaft, and at least one bearing is installed between the inside of the bearing seat and the main shaft; at least one axial seal is axially installed on the side of the inside of the bearing seat close to the shell, and an inflation port is arranged on the side wall of the bearing seat, and the space between the bearing seat and the main shaft is filled with helium, and the solid antioxidant dust can be blocked outside the bearing seat sealing cavity by arranging the axial seal to prevent the bearing from being impacted by the solid antioxidant dust, and at the same time, nitrogen is introduced into the bearing seat sealing cavity to make the sealing cavity higher than the pressure at the conveying end of the tube chain machine, and the solid antioxidant dust cannot enter the bearing seat sealing cavity.

[0005] Preferably, the axial seal comprises a labyrinth seal axially supporting the housing and a skeleton oil seal located on one side of the labyrinth seal, which can effectively block the dust of the solid antioxidant.

[0006] Preferably, a spacer sleeve is axially arranged between the skeleton oil seal and the bearing, so that there is a certain distance between the bearing and the skeleton oil seal, thereby effectively protecting the bearing.

[0007] Preferably, a pressure plate is provided between the labyrinth seal and the housing, and a pressure ring is provided between the spacer sleeve and the bearing, so as to strengthen the labyrinth seal and improve the blocking effect.

[0008] Preferably, the bearings are two arranged side by side and have sufficient bearing pressure to ensure smooth rotation of the main shaft.

[0009] Preferably, a bearing cover is detachably mounted on the outer side of the bearing seat, and the inner side of the bearing cover abuts against the axial direction of the bearing, so as to limit the axial position of the bearing and facilitate installation and maintenance.

[0010] Preferably, the bearing cover and the bearing seat, as well as the bearing seat and the housing are connected by a plurality of first screws, so as to facilitate disassembly and installation.

[0011] Preferably, the helium pressure in the sealing chamber is not less than 0.1 MPA, so that the helium pressure can be higher than the pressure at the conveying end of the tube chain machine to achieve air sealing.

[0012] Preferably, a positioning plate is installed at the end of the main shaft through an axial connecting screw, the radial dimension of the positioning plate is larger than the diameter of the main shaft, and the bearing abuts against the positioning plate.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] By setting an axial seal, the solid antioxidant dust can be blocked outside the bearing seat sealing cavity, preventing the bearing from being impacted by the solid antioxidant dust. At the same time, nitrogen is introduced into the bearing seat sealing cavity to make the sealing cavity higher than the pressure at the conveying end of the tube chain machine, and the solid antioxidant dust cannot enter the bearing seat sealing cavity, thereby solving the problem that the existing sealing structure is prone to bearing wear and jamming and short service life. This structure can not only reduce the maintenance cost but also extend the equipment operation cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the existing shaft end sealing structure of the utility model;

[0016] Figure 2 This is a main cross-sectional structural diagram of the utility model;

[0017] Figure 3 It is a partially enlarged structural diagram of the utility model.

[0018] Reference numerals:

[0019] 1. Main shaft, 11. Pressing ring, 12. Bearing, 13. Positioning plate, 14. Axial connecting screw, 15. Pressing plate, 2. Bearing seat, 3. Housing, 4. Transmission wheel of tube chain machine, 5. Bearing gland, 6. First screw, 7. Labyrinth seal, 8. Inflating port, 9. Skeleton oil seal, 10. Spacer sleeve. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] like Figure 1-3 As shown, the utility model provides the following technical solutions to solve the problems that the existing sealing structure is prone to bearing wear and jamming and has a short service life: a shaft end sealing structure of a tube chain machine, comprising a shell 3, wherein a tube chain machine transmission wheel 4 is arranged inside the shell 3; a main shaft 1 passes through the shell 3 horizontally, and the tube chain machine transmission wheel 4 is sleeved on the main shaft 1; a bearing seat 2 is installed on both sides of the shell 3 and sleeved on the main shaft 1, and at least one bearing 12 is installed between the inside of the bearing seat 2 and the main shaft 1; at least one axial seal is axially installed on the side of the inside of the bearing seat 2 close to the shell 3, and an inflation port 8 is arranged on the side wall of the bearing seat 2, and the space between the bearing seat 2 and the main shaft 1 is filled with helium. By setting the axial seal, solid antioxidant dust can be blocked outside the bearing seat sealing chamber to prevent the bearing from being impacted by the solid antioxidant dust. At the same time, nitrogen is introduced into the bearing seat sealing chamber to make the sealing chamber higher than the pressure at the conveying end of the tube chain machine, and the solid antioxidant dust cannot enter the bearing seat sealing chamber.

[0022] Specifically, in order to meet the rotation of the main shaft 1, there must be a gap between the shell 3 and the main shaft 1, so the solid antioxidant dust can easily enter the internal space of the bearing seat 2 from the gap. In this embodiment, the solid antioxidant dust can be effectively blocked by an axial seal, wherein the axial seal may include a labyrinth seal 7 axially supporting the shell 3 and a skeleton oil seal 9 located on one side of the labyrinth seal 7. The labyrinth seal 7 has a complex structure and can effectively block the dust, while the skeleton oil seal 9 can block the lubricating oil in the bearing seat 2 to prevent the lubricating oil from leaking, and the skeleton oil seal 9 can axially limit the labyrinth seal 7.

[0023] Among them, the helium pressure in the sealing chamber is not less than 0.1 MPA, so that the helium pressure can be higher than the pressure at the conveying end of the tube chain machine to achieve air sealing.

[0024] In this embodiment, if Figure 3As shown, a spacer sleeve 10 is axially arranged between the skeleton oil seal 9 and the bearing 12, so that there is a certain distance between the bearing 12 and the skeleton oil seal 9, and the bearing 12 is effectively protected. Among them, a pressure plate 15 is arranged between the labyrinth seal 7 and the housing 3, and a pressure ring 11 is arranged between the spacer sleeve 10 and the bearing 12, which can strengthen the labyrinth seal 7 and improve the blocking effect. The pressure ring 11 can further protect the bearing 12. The outer edge of the pressure plate 15 contacts the bearing seat 2, and the inner edge of the pressure plate 15 is in close contact with the main shaft 1, which can effectively limit the labyrinth seal 7 so that the labyrinth seal 7 will not directly contact the housing 3.

[0025] In this embodiment, if Figure 2-3 As shown, the bearings 12 are two arranged side by side, with sufficient bearing pressure to ensure the smooth rotation of the main shaft. The bearings 12 can be ball bearings.

[0026] In order to facilitate the installation of the sealing structure, a bearing cover 5 is detachably installed on the outer side of the bearing seat 2. The inner side of the bearing cover 5 is axially abutted against the bearing 12, which can limit the axial position of the bearing 12 and facilitate installation and maintenance. The bearing cover 5 and the bearing seat 2 are connected as well as the bearing seat 2 and the housing 3 by a plurality of first screws 6, which are convenient for disassembly and installation.

[0027] In this embodiment, a positioning plate 13 is installed at the end of the main shaft 1 through an axial connecting screw 14. The radial dimension of the positioning plate 13 is larger than the diameter of the main shaft 1. The bearing 12 is abutted against the positioning plate 13. The bearing 12 can be pre-positioned through the positioning plate 13 to improve the firmness of the installation of the bearing 12.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A shaft end sealing structure of a tube chain machine, comprising: A housing (3), wherein a tube chain machine transmission wheel (4) is arranged inside the housing (3); A main shaft (1) passes through the housing (3) transversely, and a tube chain machine transmission wheel (4) is sleeved on the main shaft (1); A bearing seat (2) is installed on both sides of the housing (3) and sleeved on the main shaft (1), and at least one bearing (12) is installed between the inside of the bearing seat (2) and the main shaft (1); It is characterized in that at least one axial seal is axially installed on the side of the bearing seat (2) close to the housing (3), an air filling port (8) is provided on the side wall of the bearing seat (2), and the sealing cavity between the bearing seat (2) and the main shaft (1) is filled with helium.

2. The shaft end sealing structure of the tube chain machine according to claim 1 is characterized in that: The axial seal comprises a labyrinth seal (7) axially supporting the housing (3) and a skeleton oil seal (9) located on one side of the labyrinth seal (7).

3. The shaft end sealing structure of the tube chain machine according to claim 2 is characterized in that: A spacer sleeve (10) is axially arranged between the skeleton oil seal (9) and the bearing (12).

4. The shaft end sealing structure of the tube chain machine according to claim 3 is characterized in that: A pressure plate (15) is arranged between the labyrinth seal (7) and the housing (3), and a pressure ring (11) is arranged between the spacer sleeve (10) and the bearing (12).

5. The shaft end sealing structure of the tube chain machine according to claim 1 is characterized in that: The bearings (12) are two arranged side by side.

6. The shaft end sealing structure of the tube chain machine according to claim 1 is characterized in that: A bearing cover (5) is detachably mounted on the outer side of the bearing seat (2), and the inner side of the bearing cover (5) is axially opposed to the bearing (12).

7. The shaft end sealing structure of the tube chain machine according to claim 6 is characterized in that: The bearing cover (5) and the bearing seat (2) as well as the bearing seat (2) and the housing (3) are connected via a plurality of first screws (6).

8. The shaft end sealing structure of the tube chain machine according to claim 1, characterized in that: The helium pressure in the sealed cavity is not less than 0.1 MPa.

9. The shaft end sealing structure of the tube chain machine according to claim 1, characterized in that: A positioning plate (13) is installed at the end of the main shaft (1) via an axial connecting screw (14); the radial dimension of the positioning plate (13) is larger than the diameter of the main shaft (1); and the bearing (12) abuts against the positioning plate (13).

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