Carbon ring seal applied to large-shaft-diameter fan

Abstract

The carbon ring seal comprises a shaft sleeve, at least two carbon rings are arranged on the outer side of the shaft sleeve in a sleeved mode, the two carbon rings comprise the first sectioning carbon ring and the second sectioning carbon ring, a partition plate is arranged between the first sectioning carbon ring and the second sectioning carbon ring, a sealing base body is arranged outside the shaft sleeve, and the sealing base body is arranged on the outer side of the shaft sleeve. The first split carbon ring, the partition plate and the second split carbon ring are arranged in the sealing base body, a plurality of axial spring grooves are formed in the axial side face of the first split carbon ring and the axial side face of the second split carbon ring, and axial springs are arranged in the axial spring grooves. Radial spring grooves are formed in the radial side faces of the first segmented carbon ring and the second segmented carbon ring, and radial springs are arranged in the radial spring grooves. The carbon ring seal applied to the large-shaft-diameter draught fan has the advantages that the following performance and the floatability of the carbon ring coaxial sleeve are adjusted, and abnormal abrasion is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of sealing technology, specifically relating to a carbon ring seal applied to large-diameter fans. Background Technology

[0002] A blower is a device that uses mechanical energy to create a gas pressure difference and discharge gas. However, current blowers have the following problems: 1. The blower shaft diameter is too large, making seal installation, maintenance, and replacement difficult; 2. The large shaft diameter leads to inaccurate positioning and easy eccentricity; 3. Relying on the throttling between the carbon ring and the shaft sleeve makes the stability of the pump shaft too dependent, and the carbon ring is easily damaged; 4. The throttling efficiency of a single-stage carbon ring is not high enough; 5. The wear resistance of the shaft sleeve affects the service life of the shaft sleeve, and the shaft sleeve causes significant wear. Utility Model Content

[0003] The purpose of this invention is to provide a carbon ring seal for use in large-diameter fans, in order to solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A carbon ring seal for use in large-diameter fans includes a bushing. At least two carbon rings are fitted on the outer side of the bushing. The two carbon rings include a first segmented carbon ring and a second segmented carbon ring. A partition is provided between the first segmented carbon ring and the second segmented carbon ring. A sealing substrate is provided outside the bushing. The first segmented carbon ring, the partition, and the second segmented carbon ring are disposed in the sealing substrate. A plurality of axial spring grooves are formed on the axial sides of both the first segmented carbon ring and the second segmented carbon ring. An axial spring is disposed in each of the axial spring grooves. Radial spring grooves are formed on the radial sides of both the first segmented carbon ring and the second segmented carbon ring. A radial spring is disposed in each of the radial spring grooves.

[0006] The working process and principle of the above structure are as follows:

[0007] Employing a two- or multi-stage carbon ring design, the flow efficiency is higher through the throttling effect of the gap between the carbon ring and the bushing. An axial spring applies axial thrust to the first segmented carbon ring, causing it to press tightly against the partition, ensuring the first segmented carbon ring's following of the partition and reducing abnormal wear. A radial spring applies radial pressure to the second segmented carbon ring, ensuring the integrity of the two segmented carbon rings, as well as their following and floating properties to the bushing, further reducing abnormal wear.

[0008] Furthermore, the sealing substrate adopts a split structure.

[0009] The carbon ring and the sealing substrate (excluding the bushing) are designed to be split, allowing for assembly after the bushing is installed. This design makes the installation, maintenance, and replacement of the carbon ring seal convenient.

[0010] Furthermore, the partition plate is connected to the sealing substrate by a first bolt passing through both.

[0011] The partition plate is fixed to the sealing substrate by the first bolt, ensuring the stability of the partition plate.

[0012] Furthermore, a positioning block is provided between the sealing substrate and the bushing. One end of the positioning block is inserted into the bushing, and the other end is inserted into the sealing substrate. The positioning block is fixed to the sealing substrate by bolts.

[0013] Using positioning blocks as the locating element, the rotor's precision ensures accurate positioning and prevents excessive eccentricity.

[0014] Furthermore, anti-rotation pins are connected between the second segmented carbon ring and the sealing substrate, as well as between the first segmented carbon ring and the sealing substrate.

[0015] The anti-rotation pin prevents the second segment carbon ring and the first segment carbon ring from rotating randomly, ensuring their stability.

[0016] Beneficial effects: This utility model adopts a two-stage or multi-stage carbon ring design, relying on the gap between the carbon ring and the bushing for throttling; the carbon ring is designed with axial and radial springs to adjust the following and floating properties of the carbon ring and the bushing, reducing abnormal wear; the sealing base is designed as a split type, which facilitates the replacement of the carbon ring wear parts; according to the large shaft diameter characteristics of the fan, a positioning block is designed and installed to accurately position the rotor and prevent excessive eccentricity. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the carbon ring structure in this utility model.

[0019] Reference numerals: 1. Bushing; 2. First segmented carbon ring; 3. Second segmented carbon ring; 4. Partition plate; 5. Sealing base; 6. Axial spring groove; 7. Axial spring; 8. Radial spring groove; 9. Radial spring; 10. First bolt; 11. Positioning block; 12. Anti-rotation pin. Detailed Implementation

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is 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. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0021] Example:

[0022] like Figure 1 and Figure 2 As shown, this embodiment provides a carbon ring seal for a large-diameter fan, including a bushing 1. The bushing 1 is hardened to increase its wear resistance and protect the shaft. At least two carbon rings are sleeved on the outside of the bushing 1. The two carbon rings include a first segmented carbon ring 2 and a second segmented carbon ring 3. A partition 4 is provided between the first segmented carbon ring 2 and the second segmented carbon ring 3. A sealing base 5 is provided outside the bushing 1. The first segmented carbon ring 2, the partition 4, and the second segmented carbon ring 3 are disposed in the sealing base 5. An axial spring groove 6 is opened on the axial side of the first segmented carbon ring 2 away from the second spring. An axial spring 7 is disposed in the axial spring groove 6. A radial spring groove 8 is opened on the radial side of the second segmented carbon ring 3. A radial spring 9 is disposed in the radial spring groove 8.

[0023] The working process and principle of the above structure are as follows:

[0024] The design employs a two- or multi-stage carbon ring system, relying on the throttling effect of the gap between the carbon ring and the bushing 1 to achieve higher flow efficiency in the dual-carbon ring system. The axial spring 7 applies axial thrust to the first segmented carbon ring 2, causing the first segmented carbon ring 2 to press tightly against the partition 4, ensuring the following of the first segmented carbon ring 2 to the partition 4 and reducing abnormal wear. The radial spring 9 applies radial pressure to the second segmented carbon ring 3, ensuring the integrity of the two segmented carbon rings, the following and floating properties of the bushing 1, and reducing abnormal wear.

[0025] In another embodiment of this utility model, such as Figure 1 As shown, the sealing substrate 5 adopts a split structure.

[0026] The carbon ring and the sealing base 5 (excluding the bushing 1) are designed to be split, allowing them to be assembled after the bushing 1 is installed. This structure makes the installation, maintenance and replacement of the carbon ring seal convenient.

[0027] In another embodiment of this utility model, such as Figure 1 and Figure 2As shown, the partition 4 and the sealing substrate 5 are connected by a first bolt 10 passing through both. The partition 4 has an L-shaped cross-section, with the first segmented carbon ring 2 located inside the partition 4 and the second segmented carbon ring 3 located outside the partition 4.

[0028] The partition 4 is fixed to the sealing base 5 by the first bolt 10 to ensure the stability of the partition 4.

[0029] In another embodiment of this utility model, such as Figure 1 and Figure 2 As shown, a positioning block 11 is provided between the sealing base 5 and the bushing 1. One end of the positioning block 11 is inserted into the bushing 1, and the other end is inserted into the sealing base 5. The positioning block 11 is fixed to the sealing base 5 by bolts. The positioning block 11 has a long strip structure.

[0030] Using positioning block 11 as the spirit seat component, accurate positioning is achieved by relying on the rotor's precision to prevent excessive eccentricity.

[0031] In another embodiment of this utility model, such as Figure 1 and Figure 2 As shown, anti-rotation pins 12 are connected between the second segmented carbon ring 3 and the sealing substrate 5, and between the first segmented carbon ring 2 and the sealing substrate 5. Part of the anti-rotation pin 12 of the second segmented carbon ring 3 is located within the sealing substrate 5, and part is located within the second segmented carbon ring 3. Similarly, part of the anti-rotation pin 12 of the first segmented carbon ring 2 is located within the sealing substrate 5, and part is located within the first segmented carbon ring 3.

[0032] The anti-rotation pin 12 can prevent the second segment carbon ring 3 from rotating randomly, ensuring its stability.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A carbon ring seal for use in large-diameter fans, characterized in that, The device includes a bushing, on the outer side of which at least two carbon rings are fitted. The two carbon rings include a first segmented carbon ring and a second segmented carbon ring. A partition is provided between the first segmented carbon ring and the second segmented carbon ring. A sealing substrate is provided outside the bushing. The first segmented carbon ring, the partition, and the second segmented carbon ring are disposed in the sealing substrate. Several axial spring grooves are formed on the axial sides of both the first segmented carbon ring and the second segmented carbon ring. An axial spring is disposed in each of the axial spring grooves. Radial springs are formed on the radial sides of both the first segmented carbon ring and the second segmented carbon ring. A radial spring is disposed in each of the radial spring grooves.

2. The carbon ring seal for large-diameter fans according to claim 1, characterized in that, The sealing substrate adopts a split structure.

3. The carbon ring seal for large-diameter fans according to claim 1, characterized in that, The partition and the sealing substrate are connected by a first bolt passing through both.

4. The carbon ring seal for large-diameter fans according to claim 1, characterized in that, A positioning block is provided between the sealing substrate and the bushing. One end of the positioning block is inserted into the bushing, and the other end is inserted into the sealing substrate. The positioning block is fixed to the sealing substrate by bolts.

5. The carbon ring seal for large-diameter fans according to claim 1, characterized in that, Anti-rotation pins are connected between the second segmented carbon ring and the sealing substrate, as well as between the first segmented carbon ring and the sealing substrate.

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