Mechanically sealed replaceable side agitator

Abstract

This utility model discloses a mechanically replaceable side-mounted agitator, comprising a motor mounted on a bracket, the motor being connected to the input shaft of a reducer via a coupling, a main shaft inserted into the central cylinder of the reducer mounting base, a hollow shaft fitted onto the outer wall of the central cylinder, a large bevel gear fixedly fitted onto the outer wall of the hollow shaft, a small bevel gear fixedly fitted onto one end of the reducer's input shaft inserted into the housing, the small bevel gear meshing with the large bevel gear, and the end of the hollow shaft connected to the end of the main shaft via a transmission sleeve; a bushing fitted onto the main shaft, and a rear-end mechanical seal fitted onto the bushing, the rear-end mechanical seal being located between the outer wall of the bushing and the inner wall of the central cylinder of the mounting base, the end of the bushing having a protruding stop ring, the front end of the rear-end mechanical seal being tightly fitted against the stop ring. This utility model discloses a mechanically replaceable side-mounted agitator, enabling online replacement of the rear-end mechanical seal.

Description

Technical Field

[0001] This utility model relates to a side agitator, and more particularly to a side-extending agitator that allows for online replacement of the mechanical seal, belonging to the field of petrochemical agitator technology. Background Technology

[0002] Currently, side-entry agitators are commonly used mixing devices in the petrochemical industry. For example, our company's Chinese patent ZL2019215487193, "Side-entry Agitator with Double-layer Mechanical Seal," improves the sealing effect by strengthening the front mechanical seal, thereby extending the agitator's service life and allowing it to be maintained and replaced at the same overhaul cycle as other standard parts such as bearings and gears. However, in actual use, it has been found that after prolonged use, due to improper use or maintenance, leakage occurs at the rear mechanical seal, which has not undergone special improvements, affecting normal operation. In this case, the rear mechanical seal must be replaced to extend the overall service life of the agitator and match that of other standard parts. Therefore, the rear mechanical seal must be improved to facilitate replacement. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a mechanically sealed replaceable side agitator.

[0004] The purpose of this utility model is achieved as follows:

[0005] A mechanically replaceable side-mounted agitator includes a motor mounted on a bracket, the motor being connected to the input shaft of a reducer via a coupling, the reducer housing being fixed to the bracket via a mounting base, and the central cylinder of the mounting base being inserted into the housing, the main shaft being inserted into the central cylinder, and a hollow shaft being fitted onto the outer wall of the central cylinder and located within the housing, with the outer wall of the hollow shaft and the inner wall of the housing being supported and connected by bearings, a large bevel gear being fixedly fitted onto the outer wall of the hollow shaft, a small bevel gear being fixed to one end of the reducer's input shaft inserted into the housing, the small bevel gear meshing with the large bevel gear, and the end of the hollow shaft being connected to the end of the main shaft via a transmission sleeve; a bushing is fitted onto the main shaft, and a rear-end mechanical seal is fitted onto the bushing, the rear-end mechanical seal being located between the outer wall of the bushing and the inner wall of the central cylinder of the mounting base, the end of the bushing having a protruding stop ring, and the front end of the rear-end mechanical seal being pressed against the stop ring.

[0006] Preferably, a ring-shaped retaining groove is provided on the outer wall of the middle part of the bushing, the lower part of the rear limiting retaining ring is embedded in the retaining groove, and the rear mechanical seal is located between the stop ring and the rear limiting retaining ring.

[0007] Preferably, the inner wall of the bushing is provided with at least one sealing groove for accommodating the sealing ring, thereby achieving a seal between the bushing and the main shaft.

[0008] Preferably, a front retaining ring fitted on the main shaft is attached to the end of the bushing to achieve a seal between the bushing and the main shaft.

[0009] Preferably, the connecting keyway provided on the inner wall of the bushing is connected to the connecting key on the main shaft.

[0010] Preferably, an impeller is fitted on one end of the main shaft extending outside the housing, and a front mechanical seal is fitted on the same end. A tapered extended support sleeve has its small end fitted onto the main shaft, its large end fixed to a bracket, and the front mechanical seal located inside the extended support sleeve.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This utility model of a mechanical seal replaceable side agitator allows for online replacement of the mechanical seal during tank operation without emptying the tank's internal medium, thus not affecting the normal operation of the tank. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the mechanically sealed replaceable side agitator of this utility model.

[0014] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0015] Figure 3 This is a schematic diagram of the structure of the bushing of this utility model.

[0016] in:

[0017] 1. Bracket; 2. Motor; 3. Reducer; 4. Main shaft; 5. Impeller; 6. Outer support sleeve; 7. Front mechanical seal; 8. Shaft sleeve; 9. Front limit retaining ring; 10. Rear limit retaining ring.

[0018] 3.1 Housing, 3.2 Fixing base, 3.3 Hollow shaft, 3.4 Transmission sleeve, 3.5 Rear mechanical seal, 3.6 Small bevel gear, 3.7 Large bevel gear;

[0019] 8.1 Stop ring, 8.2 Retaining ring groove, 8.3 Sealing groove, 8.4 Connecting keyway. Detailed Implementation

[0020] See Figures 1-3This utility model relates to a mechanically sealed replaceable side mixer, which includes a motor 2 mounted on a bracket 1. The motor 2 is connected to the input shaft of a reducer 3 via a coupling. The housing 3.1 of the reducer 3 is fixed to the bracket 1 via a fixing seat 3.2, and the central cylinder of the fixing seat 3.2 is inserted into the housing 3.1. The main shaft 4 is inserted into the central cylinder. The hollow shaft 3.3 is fitted onto the outer wall of the central cylinder and is located inside the housing 3.1. The outer wall of the hollow shaft 3.3 is connected to the inner wall of the housing 3.1 by bearing support. A large bevel gear 3.7 is fixedly fitted onto the outer wall of the hollow shaft 3.3. A small bevel gear 3.6 is fixed to one end of the input shaft of the reducer 3 inserted into the housing 3.1, and the small bevel gear 3.6 and the large bevel gear 3.7 mesh. The end of the hollow shaft 3.3 is connected to the end of the main shaft 4 via a transmission sleeve 3.4.

[0021] A bushing 8 is fitted onto the main shaft 4, and a connecting keyway 8.4 on the inner wall of the bushing 8 is connected to a connecting key on the main shaft 4 for transmission. After the rear mechanical seal 3.5 is fitted onto the bushing 8, the rear mechanical seal 3.5 is located between the outer wall of the bushing 8 and the inner wall of the central cylinder of the fixed seat 3.2. The end of the bushing 8 is provided with a stop ring 8.1, and the middle outer wall of the bushing 8 is provided with an annular retaining ring groove 8.2. The lower part of the rear limiting retaining ring 10 is embedded in the retaining ring groove 8.2, and the rear mechanical seal 3.5 is located between the stop ring 8.1 and the rear limiting retaining ring 10, which not only prevents axial disturbance but also improves the sealing performance. At the same time, the inside of the bushing 8 is provided with at least one sealing groove 8.3 for accommodating the sealing ring, thereby achieving a seal between the bushing 8 and the main shaft 4. After assembly, a front limiting retaining ring 9 fitted onto the main shaft 4 is provided at the end of the bushing 8, thereby further ensuring the seal between the bushing 8 and the main shaft 4.

[0022] Furthermore, an impeller 5 is fitted on one end of the main shaft 4 that extends outside the housing 3.1, and a front mechanical seal 7 is fitted on the other end of the main shaft 4 that extends outside the housing 3.1. The small end of an extended support sleeve 6 with a conical structure is fitted on the main shaft 4, the large end is fixed on the bracket 1, and the front mechanical seal 7 is located inside the extended support sleeve 6.

[0023] During operation, the bracket 1 is installed on the outer wall of the storage tank, and the impeller 5 is inserted into the storage tank. The motor 2 drives the meshing large bevel gear 3.7 and small bevel gear 3.6 through the input shaft of the reducer 3, thereby driving the hollow shaft 3.3 to rotate through gear meshing transmission. At the same time, the end of the hollow shaft 3.3 drives the main shaft 4 to rotate through the transmission sleeve 3.4, thereby smoothly driving the impeller 5 on the main shaft 4 to perform stirring and mixing operations.

[0024] When the rear mechanical seal 3.5 needs to be replaced, remove the transmission sleeve 3.4 to expose the bushing 8. Use a special tool to pull out the bushing 8 along with the rear mechanical seal 3.5 and separate it from the main shaft 4. After replacing the new rear mechanical seal 3.5, press the bushing 8 back onto the main shaft 4 to complete the replacement.

[0025] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A mechanically sealed replaceable side agitator, comprising a motor (2) mounted on a bracket (1), the motor (2) being connected to the input shaft of a reducer (3) via a coupling, the housing (3.1) of the reducer (3) being fixed to the bracket (1) via a fixing seat (3.2), and the central cylinder of the fixing seat (3.2) being inserted into the housing (3.1), the main shaft (4) being inserted into the central cylinder, and the hollow shaft (3.3) being fitted onto the outer wall of the central cylinder and located inside the housing (3.1), and The outer wall of the hollow shaft (3.3) is connected to the inner wall of the housing (3.1) by bearing support. A large bevel gear (3.7) is fixedly mounted on the outer wall of the hollow shaft (3.3). A small bevel gear (3.6) is fixed on one end of the input shaft of the reducer (3) inserted into the housing (3.1). The small bevel gear (3.6) and the large bevel gear (3.7) mesh with each other. The end of the hollow shaft (3.3) is connected to the end of the main shaft (4) through a transmission sleeve (3.4). The feature is that: A bushing (8) is fitted onto the main shaft (4), and a rear mechanical seal (3.5) is fitted onto the bushing (8). The rear mechanical seal (3.5) is located between the outer wall of the bushing (8) and the inner wall of the central cylinder of the fixed seat (3.2). The end of the bushing (8) is provided with a stop ring (8.1), and the front end of the rear mechanical seal (3.5) is close to the stop ring (8.1).

2. The mechanically sealed replaceable side agitator according to claim 1, characterized in that: The bushing (8) has a ring-shaped retaining groove (8.2) on its outer wall. The lower part of the rear retaining ring (10) is embedded in the retaining groove (8.2). The rear mechanical seal (3.5) is located between the stop ring (8.1) and the rear retaining ring (10).

3. A mechanically sealed replaceable side agitator according to claim 1 or 2, characterized in that: The inner wall of the bushing (8) is provided with at least one sealing groove (8.3) for accommodating the sealing ring, thereby achieving a seal between the bushing (8) and the main shaft (4).

4. A mechanically sealed replaceable side agitator according to claim 1 or 2, characterized in that: The end of the bushing (8) is fitted with a front limiting retaining ring (9) that is fitted on the main shaft (4) to achieve a seal between the bushing (8) and the main shaft (4).

5. A mechanically sealed replaceable side agitator according to claim 1 or 2, characterized in that: The connecting keyway (8.4) provided on the inner wall of the bushing (8) is connected to the connecting key on the spindle (4).

6. A mechanically sealed replaceable side agitator according to claim 1 or 2, characterized in that: An impeller (5) is fitted on one end of the main shaft (4) that extends outside the housing (3.1), and a front mechanical seal (7) is fitted on the other end of the main shaft (4) that extends outside the housing (3.1). The small end of an extended support sleeve (6) with a conical structure is fitted on the main shaft (4), and the large end is fixed on the bracket (1). The front mechanical seal (7) is located inside the extended support sleeve (6).

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