Mechanical sealing device convenient to maintain

Abstract

According to the mechanical sealing device convenient to maintain, the rear surface of a front protective shell is fixedly connected with a rear protective shell through bolts, the front protective shell and the rear protective shell are provided with fixing holes, the bolts are located in the fixing holes, the rear ends of the bolts are in threaded connection with nuts, and the lower bottom wall of the front protective shell is fixedly connected with a positioning ring; a spring is fixedly connected to the upper surface of the positioning ring, a pushing ring is fixedly connected to the upper end of the spring, a movable ring is fixedly connected to the upper surface of the pushing ring, a static ring is fixedly connected to the upper top wall of the front protective shell, a static ring sealing ring is fixedly connected to the upper top wall of the front protective shell, and a movable ring sealing ring is fixedly connected to the joint of the movable ring and the pushing ring. Limiting holes are formed in the pushing ring and the positioning ring, the two ends of the spring are located in the limiting holes, shaft sleeves are movably connected to the inner walls of the front protection shell and the rear protection shell, and through the devices, the maintenance time is shortened, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, in particular to a mechanical seal device which is easy to maintain. Background Art

[0002] A mechanical seal is a shaft sealing device for a rotating machine. It refers to a device that prevents fluid leakage by maintaining contact and relative sliding of at least one pair of end faces perpendicular to the axis of rotation under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism and the cooperation of an auxiliary seal. Existing mechanical seals are not easy to install and disassemble during maintenance. For example, a Chinese patent discloses "an integrated external spring compensation mechanical seal device", and its application number is: "202020386897.7". It uses a shaft sleeve and a compensation spring, and the compensation spring is sleeved outside the shaft sleeve to ensure that the shaft body is separated from the compensation spring during operation, thereby extending the service life of the compensation spring. The sealing box is sealed by a sliding plate, and the snap-fit ​​structure is easy to disassemble. It can be quickly disassembled and repaired during maintenance, saving a lot of time. However, the snap-fit ​​structure of the device is complex, and the mechanical seal cannot be installed quickly. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a mechanical sealing device that is easy to maintain. The protective shell is divided into a front part and a rear part and is fixed with bolts and nuts, which facilitates the assembly and maintenance of internal mechanical sealing accessories, thereby shortening the maintenance time and reducing the maintenance cost.

[0004] The utility model also provides the above-mentioned mechanical sealing device which is easy to maintain, comprising: a front protective shell, the rear surface of the front protective shell is fixedly connected with the rear protective shell by bolts, the front protective shell and the rear protective shell are provided with fixing holes, the bolts are located inside the fixing holes, the rear ends of the bolts are threadedly connected with nuts, the lower bottom wall of the front protective shell is fixedly connected with a positioning ring, the upper surface of the positioning ring is fixedly connected with a spring, the upper end of the spring is fixedly connected with a pushing ring, the upper surface of the pushing ring is fixedly connected with a dynamic ring, the upper top wall of the front protective shell is fixedly connected with a static ring, the upper top wall of the front protective shell is fixedly connected with a static ring sealing ring, the connection between the dynamic ring and the pushing ring is fixedly connected with a dynamic ring sealing ring, the pushing ring and the positioning ring are both provided with limiting holes, the two ends of the spring are located inside the limiting holes, the inner walls of the front protective shell and the rear protective shell are movably connected with shaft sleeves, and the above device is beneficial to shorten the maintenance time and reduce the maintenance cost.

[0005] According to the mechanical sealing device easy to maintain described in the utility model, the static ring sealing ring is located above the static ring, and the static ring is located directly above the dynamic ring. The above device is beneficial to enhancing the overall sealing performance.

[0006] According to the utility model, a mechanical seal device that is easy to maintain, the positioning ring, spring, push ring, static ring and dynamic ring are all located on the side surface of the sleeve. The above devices are beneficial to ensuring the operation of the mechanical seal accessories.

[0007] According to the mechanical sealing device that is easy to maintain described in the utility model, a limiting plate is provided on the rear surface of the front protective shell, and a limiting groove is provided on the front surface of the rear protective shell. The above devices are beneficial to positioning connection and ensuring the accuracy of installation.

[0008] According to the mechanical sealing device that is easy to maintain described in the utility model, the limiting plate is located inside the limiting groove, and the front protective shell covers the limiting groove. The above device is beneficial to enhancing the connection stability between the front protective shell and the rear protective shell.

[0009] According to the mechanical sealing device that is easy to maintain described in the utility model, a sealing strip is fixedly connected to the rear surface of the front protective shell, and the sealing strip is wrapped around the side surface of the limiting plate. The above device is beneficial to ensuring the sealing effect of the front protective shell and the rear protective shell.

[0010] According to the mechanical sealing device that is easy to maintain described in the utility model, the limiting hole is located at the lower surface of the push ring and the upper surface of the positioning ring, and the spring is located between the push ring and the positioning ring. The above device is beneficial to ensure the stability and positioning of the spring.

[0011] Beneficial Effects

[0012] 1. Compared with the prior art, the mechanical seal device which is easy to maintain is divided into a front part and a rear part by a protective shell and fixed by bolts and nuts, which is convenient for the assembly and maintenance of the internal mechanical seal accessories, and is beneficial to shorten the maintenance time and reduce the maintenance cost.

[0013] 2. Compared with the prior art, this easy-to-maintain mechanical sealing device can limit and fix the spring by setting limit holes on the positioning ring and the push ring and installing springs, thereby avoiding wear of the spring during operation, facilitating installation and debugging, and reducing maintenance frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0015] Figure 1 A three-dimensional structural diagram of a mechanical sealing device that is easy to maintain according to the utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of a mechanical seal device that is easy to maintain according to the utility model;

[0017] Figure 3 This is an internal structural diagram of the mechanical sealing device of the utility model which is easy to maintain;

[0018] Figure 4 The utility model is a mechanical sealing device which is easy to maintain Figure 2 Enlarged view of point D in the middle.

[0019] Legend:

[0020] 1. Front protective shell; 2. Rear protective shell; 3. Fixing hole; 4. Bolt; 5. Nut; 6. Positioning ring; 7. Spring; 8. Push ring; 9. Dynamic ring seal; 10. Dynamic ring; 11. Static ring; 12. Static ring seal; 13. Sealing strip; 14. Limit plate; 15. Limit groove; 16. Limit hole; 17. Bushing. DETAILED DESCRIPTION

[0021] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0022] Reference Figure 1-4 The utility model embodiment is a mechanical sealing device that is easy to maintain, which includes: a front protective shell 1, which is one of the main protective structures of the mechanical sealing device, and together with the rear protective shell 2 forms a closed sealing environment. The rear surface of the front protective shell 1 is fixedly connected to the rear protective shell 2 by bolts 4, and is fixedly connected to the front protective shell 1 by bolts 4 and nuts 5 to jointly protect the internal sealing components. The front protective shell 1 and the rear protective shell 2 are provided with fixing holes 3 for the bolts 4 to pass through to connect the front protective shell 1 and the rear protective shell 2. The bolts 4 are located inside the fixing holes 3, and the rear end of the bolts 4 is threadedly connected with the nuts 5 for fastening the front protective shell 1 and the rear protective shell 2.

[0023] The lower bottom wall of the front protective shell 1 is fixedly connected with a positioning ring 6 for providing support and positioning for the spring 7. The upper surface of the positioning ring 6 is fixedly connected with a spring 7 for providing continuous elastic force to ensure that the dynamic ring 10 and the static ring 11 maintain close contact and achieve sealing. The upper end of the spring 7 is fixedly connected with a push ring 8 for supporting and pushing the dynamic ring 10 to be in close contact with the static ring 11. The upper surface of the push ring 8 is fixedly connected with the dynamic ring 10 for forming a sealing interface with the static ring 11. The upper top wall of the front protective shell 1 is fixedly connected with the static ring 11 for preventing liquid or gas leakage. The static ring 11 is located directly above the dynamic ring 10. A static ring sealing ring 12 is fixedly connected to the upper top wall of the front protective shell 1 for enhancing the sealing effect between the static ring 11 and the front protective shell 1. The static ring sealing ring 12 is located above the static ring 11. A dynamic ring sealing ring 9 is fixedly connected to the connection between the dynamic ring 10 and the pushing ring 8 for enhancing the sealing effect between the dynamic ring 10 and the pushing ring 8. Limiting holes 16 are provided on the pushing ring 8 and the positioning ring 6 for limiting the displacement of the spring 7. The limiting hole 16 is located on the lower surface of the pushing ring 8 and the upper surface of the positioning ring 6. The spring 7 is located between the pushing ring 8 and the positioning ring 6, and both ends of the spring 7 are located inside the limiting hole 16.

[0024] The inner walls of the front protective shell 1 and the rear protective shell 2 are movably connected with a sleeve 17 for ensuring the operation of the mechanical seal. The positioning ring 6, spring 7, push ring 8, static ring 11 and dynamic ring 10 are all located on the side surface of the sleeve 17. A limiting plate 14 is provided on the rear surface of the front protective shell 1 for cooperating with the limiting groove 15 of the rear protective shell 2 to enhance the connection stability between the front protective shell 1 and the rear protective shell 2. A limiting groove 15 is provided on the front surface of the rear protective shell 2 for cooperating with the limiting plate 14 to ensure accurate positioning and connection between the front protective shell 1 and the rear protective shell 2. The limiting plate 14 is located inside the limiting groove 15, and the front protective shell 1 covers the limiting groove 15. A sealing strip 13 is fixedly connected to the rear surface of the front protective shell 1 to prevent liquid or gas from leaking from the connection, and the sealing strip 13 is wrapped around the side surface of the limiting plate 14.

[0025] Working principle: the front protective shell 1 and the rear protective shell 2 are fixedly connected by bolts 4 and nuts 5 to form a closed mechanical sealing environment. At the same time, the limiting plate 14 and the limiting groove 15 enhance the connection stability between the front protective shell 1 and the rear protective shell 2. The sealing strip 13 is wrapped around the side surface of the limiting plate 14 to enhance the sealing between the front protective shell 1 and the rear protective shell 2 to prevent loosening or leakage under high pressure or high-speed rotation conditions. When it is necessary to repair or replace the sealing parts, just loosen the bolts 4 and nuts 5, separate the front protective shell 1 and the rear protective shell 2, and you can easily access the internal sealing parts for repair or replacement, positioning ring 6, spring 7, push ring 8, push ring Components such as 10 and static ring 11 are all located inside the front protective shell 1 and the rear protective shell 2, forming the core part of the mechanical seal. When the sleeve 17 (usually connected to the rotating shaft) rotates, the dynamic ring 10 is in close contact with the sleeve 17 and rotates with the sleeve 17, while the static ring 11 is fixed, forming a tiny sealing gap between the dynamic ring 10. The dynamic ring sealing ring 9 and the static ring sealing ring 12 respectively ensure the sealing effect between the dynamic ring 10 and the static ring 11 to prevent liquid or gas leakage. The spring 7 is located between the push ring 8 and the positioning ring 6, and continuously applies pressure to the dynamic ring 10 through its elastic force to ensure a constant contact pressure between the dynamic ring 10 and the static ring 11, thereby enhancing the sealing effect.

[0026] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A mechanical sealing device that is easy to maintain, characterized in that: include: A front protective shell (1), the rear surface of the front protective shell (1) is fixedly connected to the rear protective shell (2) by means of bolts (4), the front protective shell (1) and the rear protective shell (2) are provided with fixing holes (3), the bolts (4) are located inside the fixing holes (3), the rear ends of the bolts (4) are threadedly connected to nuts (5), the lower bottom wall of the front protective shell (1) is fixedly connected to a positioning ring (6), the upper surface of the positioning ring (6) is fixedly connected to a spring (7), the upper end of the spring (7) is fixedly connected to a push ring (8), the push ring (8 ) is fixedly connected to the upper surface of the front protective shell (1), a static ring (11) is fixedly connected to the upper top wall of the front protective shell (1), a static ring sealing ring (12) is fixedly connected to the upper top wall of the front protective shell (1), a dynamic ring sealing ring (9) is fixedly connected to the connection between the dynamic ring (10) and the push ring (8), limiting holes (16) are provided on the push ring (8) and the positioning ring (6), both ends of the spring (7) are located inside the limiting holes (16), and a shaft sleeve (17) is movably connected to the inner wall of the front protective shell (1) and the rear protective shell (2).

2. A mechanical seal device that is easy to maintain according to claim 1, characterized in that: The static ring sealing ring (12) is located above the static ring (11), and the static ring (11) is located directly above the dynamic ring (10).

3. A mechanical seal device that is easy to maintain according to claim 1, characterized in that: The positioning ring (6), the spring (7), the pushing ring (8), the stationary ring (11) and the moving ring (10) are all located on the side surface of the shaft sleeve (17).

4. A mechanical seal device that is easy to maintain according to claim 1, characterized in that: A limiting plate (14) is provided on the rear surface of the front protective shell (1), and a limiting groove (15) is provided on the front surface of the rear protective shell (2).

5. A mechanical seal device that is easy to maintain according to claim 4, characterized in that: The limiting plate (14) is located inside the limiting groove (15), and the front protective shell (1) covers the limiting groove (15).

6. A mechanical seal device that is easy to maintain according to claim 4, characterized in that: A sealing strip (13) is fixedly connected to the rear surface of the front protective shell (1), and the sealing strip (13) is wound around the side surface of the limiting plate (14).

7. A mechanical seal device that is easy to maintain according to claim 1, characterized in that: The limiting hole (16) is located on the lower surface of the pushing ring (8) and the upper surface of the positioning ring (6), and the spring (7) is located between the pushing ring (8) and the positioning ring (6).

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