Rotary drum stirring suspension shaft assembly

Abstract

The utility model discloses a rotary drum stirring suspension shaft assembly which comprises a suspension shaft, a bearing box, a bearing gland and a self-aligning roller bearing, the self-aligning roller bearing is connected to one end part of the suspension shaft in a sleeving manner; the bearing box covers the outer parts of the self-aligning roller bearing and the suspension shaft; and a bearing gland is arranged at an opening, close to the self-aligning roller bearing, of the bearing box. The shaft sleeve is transformed into a rolling bearing supporting structure, so that the abrasion of the suspension shaft is obviously limited. Therefore, the risk of abrasion and leakage of the box body is reduced. The equipment operation period is prolonged, the maintenance frequency is reduced, the bearing is convenient to disassemble and replace during planned maintenance, the drum core does not need to be hung, and the maintenance risk and the maintenance time are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of polycrystalline silicon production, and specifically relates to a rotary drum stirring suspension shaft assembly. Background Technology

[0002] The existing drum agitator suspension shaft assembly includes: a suspension shaft, a PTFE bushing, and a gland. After one operating cycle (2-3 months), the suspension shaft and bushing will wear down, and the agitator frame will sink. Increased sinking distance of the agitator frame will wear down the bottom of the housing, and in severe cases, this can lead to the agitator frame wearing down the drum bottom housing, resulting in a risk of leakage due to housing wear. Utility Model Content

[0003] Purpose of the utility model: The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a rotating drum agitator suspension shaft assembly, thereby reducing the risk of wear on the suspension shaft assembly and wear leakage of the housing.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A rotary drum agitator suspension shaft assembly includes a suspension shaft, a bearing housing, a bearing cap, and a self-aligning roller bearing. The self-aligning roller bearing is sleeved on one end of the suspension shaft. The bearing housing covers the outside of the self-aligning roller bearing and the suspension shaft. A bearing cap is provided at the opening of the bearing housing near the self-aligning roller bearing. By modifying the bushing into a rolling bearing support structure, the wear of the suspension shaft is significantly limited.

[0006] Furthermore, the bearing housing sidewall has a through-hole oil injection channel. The outer end of the oil injection channel is connected to the oil filler nozzle on the outer wall of the bearing housing, and the inner end of the oil injection channel is connected to the perforated ring located on the outer wall of the suspension shaft. A set of skeleton oil seals is provided on both sides of the perforated ring. This sealing structure increases the service life of the bearing.

[0007] Furthermore, a nitrogen purging channel is also provided inside the suspension shaft. One end of the nitrogen purging channel is led out from the end of the suspension shaft and connected to an external gas source pipe, while the other end is led out to the bearing housing through the radial channel of the suspension shaft.

[0008] Specifically, the perforated ring is fitted onto the outer wall of the suspension shaft, and a channel perpendicular to the axial direction of the suspension shaft is reserved inside the perforated ring. The channel inside the perforated ring is connected to the oil injection channel inside the bearing housing.

[0009] Furthermore, a sealing ring is provided between one side of the self-aligning roller bearing and the skeleton oil seal, and a retaining ring is provided on the other side of one side of the self-aligning roller bearing.

[0010] Furthermore, a sealing ring is also provided inside the bearing housing. The sealing ring is sleeved on the outside of the suspension shaft at the radial channel of nitrogen purging, and the sealing ring is located between the skeleton oil seal and the end of the bearing housing.

[0011] Furthermore, a second O-ring is provided at the bottom of the sealing ring where it contacts the suspension shaft, and the second O-ring is located on both sides of the radial channel purged by nitrogen.

[0012] Furthermore, a first O-ring is provided at the contact point between the end of the bearing housing and the suspension shaft.

[0013] Furthermore, the outer ring of the bearing housing is fixed by a set of bearing housing fastening screws; the outer ring of the bearing cover is installed at the opening of the self-aligning roller bearing by a set of bearing cover fastening screws.

[0014] Furthermore, the nitrogen purging channel leading out from the end of the suspension shaft is connected to an external gas source pipe through a compression fitting.

[0015] Beneficial effects:

[0016] This invention modifies the size and structure of the suspension shaft without altering the overall mixing frame. The shaft sleeve is replaced with a rolling bearing, and a suspension shaft sealing assembly and nitrogen purging are added to enhance the sealing effect. The change from sliding to rolling reduces the probability of wear, thereby lowering the risk of wear and leakage in the housing. This extends the equipment's operating cycle, reduces maintenance frequency, and facilitates bearing removal and replacement during planned maintenance without the need for lifting the drum core, thus reducing maintenance risks and time. Attached Figure Description

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the present invention in the above and / or other aspects will become clearer.

[0018] Figure 1 This is a schematic diagram of the overall structure of the rotary drum agitator suspension shaft assembly.

[0019] The reference numerals in the attached figures represent:

[0020] 1-Suspension shaft; 2-First O-ring; 3-Bearing housing; 4-Second O-ring; 5-Sealing ring; 6-Skeleton oil seal; 7-Bearing housing fastening screw; 8-Hole ring; 9-Sealing retaining ring; 10-Oil filler nozzle; 11-Bearing cap; 12-Compression fitting; 13-Air supply pipe; 14-Snap ring; 15-Self-aligning roller bearing; 16-Bearing cap fastening screw. Detailed Implementation

[0021] The present invention can be better understood from the following embodiments.

[0022] The structures, proportions, and sizes shown in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, terms such as "upper," "lower," "front," "rear," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0023] like Figure 1 As shown, the improved rotary drum agitator suspension shaft assembly includes a suspension shaft 1, a bearing housing 3, a bearing cap 11, and a self-aligning roller bearing 15. The self-aligning roller bearing 15 is sleeved on one end of the suspension shaft 1. The bearing housing 3 covers the outside of the self-aligning roller bearing 15 and the suspension shaft 1. The bearing cap 11 is provided at the opening of the bearing housing 3 near the self-aligning roller bearing 15. By modifying the bushing into a rolling bearing support structure, the wear of the suspension shaft is significantly limited.

[0024] In some embodiments, the side wall of the bearing housing 3 has a through-hole oil injection channel. The outer end of the oil injection channel is connected to the oil filling nozzle 10 provided on the outer wall of the bearing housing 3, and the inner end of the oil injection channel is connected to the perforated ring 8 located on the outer wall of the suspension shaft 1. A set of skeleton oil seals 6 are respectively provided on both sides of the perforated ring 8. The service life of the bearing is increased by this sealing structure.

[0025] In some embodiments, a nitrogen purging channel is also provided inside the suspension shaft 1. One end of the nitrogen purging channel is led out from the end of the suspension shaft 1 and connected to the external gas source pipe 13, and the other end is led out to the bearing housing 3 through the radial channel of the suspension shaft 1.

[0026] The perforated ring 8 is fitted on the outer wall of the suspension shaft 1, and a channel perpendicular to the axial direction of the suspension shaft 1 is reserved in the perforated ring 8. The channel in the perforated ring 8 is connected to the oil injection channel in the bearing housing 3.

[0027] In some embodiments, a sealing ring 9 is provided between one side of the self-aligning roller bearing 15 and the skeleton oil seal 6, and a retaining ring 14 is provided on the other side of one side of the self-aligning roller bearing 15.

[0028] In some embodiments, a sealing ring 5 is also provided inside the bearing housing 3. The sealing ring 5 is sleeved on the outside of the suspension shaft 1 at the radial channel of nitrogen purging, and the sealing ring 5 is located between the skeleton oil seal 6 and the end of the bearing housing 3.

[0029] In some embodiments, a second O-ring 4 is provided at the bottom of the sealing ring 5 where it contacts the suspension shaft 1, and the second O-ring 4 is located on both sides of the radial channel of nitrogen purging.

[0030] In some embodiments, a first O-ring 2 is provided at the contact point between the end of the bearing housing 3 and the suspension shaft 1.

[0031] In some embodiments, the outer ring of the bearing housing 3 is fixed by a set of bearing housing fastening screws 7; the outer ring of the bearing cover 11 is installed at the opening of the self-aligning roller bearing 15 by a set of bearing cover fastening screws 16.

[0032] In some embodiments, the nitrogen purging channel leading out from the end of the suspension shaft 1 is connected to the external gas source pipe 13 through the compression fitting 12.

[0033] The sealing structure of the rotating drum agitator suspension shaft assembly of this utility model mainly consists of 1 sealing ring + 2 sets of oil seals + 1 set of hole rings + 2 sets of oil seals + 1 sealing retaining ring + 1 bearing + 1 bearing cover and nitrogen seal. The sealing ring and hole ring are made of polytetrafluoroethylene filled with carbon fiber material, and the oil seal is made of high temperature resistant fluororubber.

[0034] The bearing housing has an oil inlet hole, which can simultaneously lubricate the bearing and the bearing ring. A nitrogen inlet is provided at the bearing cap on the right side of the bearing, which can ensure that the seal and the bearing operate in a positive pressure environment, thus guaranteeing the sealing and bearing performance.

[0035] The main body of this utility model's suspension shaft assembly includes a suspension shaft, a bearing housing, rolling bearings, and sealing components. The suspension shaft undergoes a pendulum motion, supported by the rolling bearings. A series of sealing components and a nitrogen seal isolate the shaft from the drum, preventing silica powder from entering the bearing housing and causing bearing wear. Lubrication points are added to the upper part of the bearing housing, allowing lubricant to be added to both the bearing and the sealing components. A sealing nitrogen gas chamber (pressure adjustable) is added to the bearing cap end face. A central opening on the suspension shaft allows nitrogen to be introduced, creating a nitrogen pressure seal at the gap between the shaft and the bearing housing end face. This utility model changes the suspension shaft's motion from sliding to rolling, significantly reducing wear caused by sliding friction.

[0036] This utility model provides a concept and method for a rotary drum stirring suspension shaft assembly. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. All components not explicitly stated in this embodiment can be implemented using existing technology.

Claims

1. A rotating drum agitator suspension shaft assembly, characterized in that, It includes a suspension shaft (1), a bearing housing (3), a bearing cover (11), and a self-aligning roller bearing (15); the self-aligning roller bearing (15) is sleeved on one end of the suspension shaft (1); the bearing housing (3) covers the outside of the self-aligning roller bearing (15) and the suspension shaft (1); the bearing housing (3) is provided with a bearing cover (11) near the opening of the self-aligning roller bearing (15).

2. The rotating drum mixing suspension shaft assembly of claim 1, wherein, The bearing housing (3) has a through-hole oil injection channel on its side wall. The outer end of the oil injection channel is connected to the oil filling nozzle (10) on the outer wall of the bearing housing (3). The inner end of the oil injection channel is connected to the hole ring (8) located on the outer wall of the suspension shaft (1). A set of skeleton oil seals (6) are respectively provided on both sides of the hole ring (8).

3. The rotating drum mixing suspension shaft assembly of claim 2, wherein, The suspension shaft (1) is also provided with a nitrogen purging channel. One end of the nitrogen purging channel is led out from the end of the suspension shaft (1) and connected to the external gas source pipe (13). The other end is led out through the radial channel of the suspension shaft (1) to the bearing box (3).

4. The rotating drum mixing suspension shaft assembly of claim 2, wherein, The perforated ring (8) is fitted on the outer wall of the suspension shaft (1), and a channel perpendicular to the axial direction of the suspension shaft (1) is reserved in the perforated ring (8). The channel in the perforated ring (8) is connected to the oil injection channel in the bearing housing (3).

5. The rotating drum mixing suspension shaft assembly of claim 2, wherein, A sealing ring (9) is provided between one side of the self-aligning roller bearing (15) and the skeleton oil seal (6), and a snap ring (14) is provided on the other side of the self-aligning roller bearing (15).

6. The rotating drum mixing suspension shaft assembly of claim 3, wherein, The bearing housing (3) is also provided with a sealing ring (5). The sealing ring (5) is sleeved on the outside of the suspension shaft (1) at the radial channel of nitrogen purging, and the sealing ring (5) is located between the skeleton oil seal (6) and the end of the bearing housing (3).

7. The rotating drum mixing suspension shaft assembly of claim 6, wherein, A second O-ring (4) is provided at the bottom of the sealing ring (5) where it contacts the suspension shaft (1). The second O-ring (4) is located on both sides of the radial channel of nitrogen purging.

8. The rotating drum mixing suspension shaft assembly of claim 1, wherein, A first O-ring (2) is provided at the end of the bearing housing (3) where it contacts the suspension shaft (1).

9. The rotating drum mixing suspension shaft assembly of claim 1, wherein, The outer ring of the bearing housing (3) is fixed by a set of bearing housing fastening screws (7); the outer ring of the bearing cover (11) is installed at the opening of the self-aligning roller bearing (15) by a set of bearing cover fastening screws (16).

10. The rotating drum mixing suspension shaft assembly of claim 3, wherein, The nitrogen purging channel leading out from the end of the suspension shaft (1) is connected to the external gas source pipe (13) through a compression fitting (12).

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