Dry gas sealing device of long-distance pipeline natural gas compressor
By using shaft sleeves, sealing blocks, fixing components and lubricating oil injection mechanism in the dry air sealing device of the natural gas compressor of long-transport pipelines, the problems of insufficient lubricating and gas leakage are solved, and sufficient lubricating oil and gas sealing are achieved, and the extension of lubricating oil is achieved. The service life of the device is improved and the sealing performance is improved.
Patent Information
- Application Number
- CN202421153693.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-24
AI Technical Summary
In the dry air sealing device of the existing long-transport pipeline natural gas compressor, insufficient lubrication or failure of lubrication between the rotating parts and the fixed parts in the mechanical seal leads to friction and wear, and it is difficult to prevent gas leakage.
A dry air sealing device including bushings, sealing blocks, fixing components, threaded parts, sealing balls, moving plates and springs is designed to ensure sufficient lubricating oil and gas sealing to prevent lubricating oil from being sealed through lubricating oil injection and gas sealing mechanisms. Extravasation and gas leakage.
It effectively avoids mechanical wear caused by insufficient lubricating oil, reduces the service life of the device, and realizes effective sealing of gas, prevents leakage, and improves the service life and sealing performance of the device.
Smart Images
Figure CN222276877U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of dry gas sealing, in particular to a dry gas sealing device for a natural gas compressor in a long-distance pipeline. Background Art
[0002] The dry gas seals of long-distance pipeline natural gas compressors are important components used to prevent natural gas from leaking from the piston or shaft seal of the compressor. These seals usually use efficient mechanical seals or dry gas seal technology to ensure that the pressure chamber of the compressor is effectively sealed under high pressure and high speed operating conditions.
[0003] Existing devices usually work under very low pressure difference. In the event of failure of the first-stage seal, a large amount of process medium is prevented from leaking on site. The isolation seal is to block the lubricating oil of the bearing box from entering the dry gas seal to prevent it from contaminating and damaging the dry gas seal. However, insufficient lubrication or lubrication failure between the rotating parts and the fixed parts in the mechanical seal will cause wear. Therefore, a dry gas sealing device for a long-distance pipeline natural gas compressor is proposed to solve the above problems. Utility Model Content
[0004] The utility model aims to solve the disadvantages of insufficient lubrication or lubrication failure between rotating parts and fixed parts in mechanical seals in the prior art, which leads to wear and tear, and proposes a dry gas sealing device for a natural gas compressor in a long-distance pipeline.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a dry gas sealing device for a long-distance pipeline natural gas compressor, comprising a shaft sleeve, a sealing block is arranged on the inner upper side of the shaft sleeve, the left and right sides of the sealing block are fixedly connected with fixed components, the inner part of the sealing block is rotatably connected with a rotating cover, the bottom of the rotating cover is fixedly connected with a threaded part, the inner part of the threaded part is slidably connected with a sealing ball, the bottom of the sealing ball is fixedly connected with a movable plate, the bottom of the movable plate is fixedly connected with a spring, an installation groove is opened on the inner upper side of the shaft sleeve, and the fixed component and the sealing block are both slidably connected inside the installation groove.
[0006] As a further description of the above technical solution:
[0007] The fixing assembly includes a fixing plate, a bolt is arranged inside the fixing plate, a mounting hole is opened inside the fixing plate, the bolt is threadedly connected inside the mounting hole, and the bolt is threadedly connected to the inside of the sleeve through the mounting hole.
[0008] As a further description of the above technical solution:
[0009] A slot is provided on the left side of the inner part of the sleeve, a sealing ring is provided on the right side of the slot, a positioning ring is provided on the right side of the sealing ring, a locking sleeve is fixedly connected to the right side of the positioning ring, a dynamic ring is provided on the outside of the positioning ring, a static ring is provided on the right side of the dynamic ring, a push ring is provided on the right side of the static ring, a spring 2 is fixedly connected to the right side of the push ring, one end of the spring 2 is fixedly connected to a spring seat, the spring seat is provided on the outside of the push ring, and an O-ring is provided on the bottom of the push ring.
[0010] As a further description of the above technical solution:
[0011] The O-ring is arranged outside the positioning ring.
[0012] As a further description of the above technical solution:
[0013] The spring seat is arranged outside the locking sleeve.
[0014] As a further description of the above technical solution:
[0015] The threaded member is threadedly connected inside the sealing block.
[0016] As a further description of the above technical solution:
[0017] An oil filling hole is provided at the bottom of the installation groove, and the sealing ball and the movable plate are both slidably connected inside the oil filling hole.
[0018] As a further description of the above technical solution:
[0019] One end of the spring 1 is fixedly connected to the bottom side of the inner wall of the oil filling hole, and the other end of the spring 1 is fixedly connected to the bottom of the moving plate.
[0020] The utility model has the following beneficial effects:
[0021] 1. In the utility model, the sealing block and the fixing plate are inserted into the installation groove, the bolts are inserted into the installation holes, and are rotated and screwed into the shaft sleeve for installation and fixing. After the lubricating oil is injected, the rotating cover is rotated to drive the threaded part to be screwed into the sealing block, so that the sealing ball is pressed down, and at the same time, the moving plate and the spring are squeezed to make the spring generate a rebound force, so that the sealing ball blocks the top opening of the threaded part, thereby avoiding the lubricating oil leakage that causes insufficient lubricating oil to cause mechanical lubrication or lubrication failure, thereby reducing the service life of the device.
[0022] 2. In the utility model, the rotating shaft and the sleeve are fixed by the clamping groove, and the sealing ring is used to seal the gas. When the gas enters through the air inlet on the upper part of the sleeve, the sleeve is driven to rotate by the rotating shaft to make the dynamic ring push the static ring, so that it squeezes the push ring and the O-ring, and at the same time squeezes the second spring to move it to the inside of the spring seat, so that the gas cannot leak, thereby realizing the protection of the gas to form a sealing layer to avoid gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is a three-dimensional diagram of the dry gas sealing device of the long-distance pipeline natural gas compressor proposed by the utility model;
[0024] Figure 2 This is a partial structural schematic diagram of the dry gas sealing device of the long-distance pipeline natural gas compressor proposed by the utility model;
[0025] Figure 3 for Figure 2 A magnified image of point A;
[0026] Figure 4 This is a cross-sectional view of the dry gas sealing device of the long-distance pipeline natural gas compressor proposed by the utility model.
[0027] Legend:
[0028] 1. Bushing; 2. Sealing block; 3. Fixed plate; 4. Bolt; 5. Mounting hole; 6. Rotating cover; 7. Threaded part; 8. Sealing ball; 9. Moving plate; 11. Spring 1; 12. Mounting groove; 14. Oil filling hole; 15. Slot; 16. Sealing ring; 17. Positioning ring; 18. Locking sleeve; 19. Moving ring; 20. Stationary ring; 21. O-ring; 22. Push ring; 23. Spring seat; 24. Spring 2. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] Reference Figure 1 , Figure 2 , Figure 3, the utility model provides an embodiment: a dry gas sealing device for a long-distance pipeline natural gas compressor, comprising a shaft sleeve 1, a sealing block 2 is arranged on the inner upper side of the shaft sleeve 1, and the left and right sides of the sealing block 2 are fixedly connected with fixed components, the sealing block 2 is rotatably connected with a rotating cover 6, the bottom of the rotating cover 6 is fixedly connected with a threaded member 7, the inside of the threaded member 7 is slidably connected with a sealing ball 8, the bottom of the sealing ball 8 is fixedly connected with a moving plate 9, and the bottom of the moving plate 9 is fixedly connected with a spring 11, a mounting groove 12 is provided on the inner upper side of the shaft sleeve 1, the fixed component and the sealing block 2 are both slidably connected to the inside of the mounting groove 12, the threaded member 7 is threadedly connected to the inside of the sealing block 2, an oil filling hole 14 is provided at the bottom of the mounting groove 12, the sealing ball 8 and the moving plate 9 are both slidably connected to the inside of the oil filling hole 14, one end of the spring 11 is fixedly connected to the bottom side of the inner wall of the oil filling hole 14, and the other end of the spring 11 is fixedly connected to the bottom of the moving plate 9;
[0031] The fixing assembly includes a fixing plate 3 , a bolt 4 is arranged inside the fixing plate 3 , a mounting hole 5 is opened inside the fixing plate 3 , the bolt 4 is threadedly connected inside the mounting hole 5 , and the bolt 4 is threadedly connected to the inside of the sleeve 1 through the mounting hole 5 .
[0032] By inserting the sealing block 2 and the fixing plate 3 into the interior of the mounting groove 12, inserting the bolt 4 into the interior of the mounting hole 5, and rotating it into the interior of the sleeve 1, the sealing block 2 and the fixing plate 3 are installed and fixed with the sleeve 1, so as to facilitate the subsequent injection of lubricating oil for protection. When the lubricating oil is injected, the rotating cover 6 is rotated to drive the threaded member 7 to move and screw into the interior of the sealing block 2 to be fixed thereto. When the rotating cover 6 is rotated and pressed downward, the sealing ball 8 is squeezed downward, and at the same time, the movable plate 9 and the spring 11 are squeezed by the sealing ball 8, so that the spring 11 generates a rebound force, and the sealing ball 8 blocks the top opening of the threaded member 7, thereby preventing the lubricating oil from leaking out and causing insufficient lubricating oil to cause mechanical lubrication or lubrication failure, thereby reducing the service life of the device.
[0033] Reference Figure 1 , Figure 4 A slot 15 is provided on the left side of the inner part of the shaft sleeve 1, a sealing ring 16 is provided on the right side of the slot 15, a positioning ring 17 is provided on the right side of the sealing ring 16, a locking sleeve 18 is fixedly connected to the right side of the positioning ring 17, a dynamic ring 19 is provided on the outside of the positioning ring 17, a static ring 20 is provided on the right side of the dynamic ring 19, a push ring 22 is provided on the right side of the static ring 20, a spring 24 is fixedly connected to the right side of the push ring 22, one end of the spring 24 is fixedly connected to the spring seat 23, the spring seat 23 is arranged on the outside of the push ring 22, and an O-ring 21 is provided on the bottom of the push ring 22; the O-ring 21 is arranged on the outside of the positioning ring 17, and the spring seat 23 is arranged on the outside of the locking sleeve 18.
[0034] The rotating shaft and the sleeve 1 are fixed by the clamping groove 15, and the sealing ring 16 is used to seal the gas. When the gas enters the interior of the sleeve 1 through the upper air inlet of the sleeve 1, the sleeve 1 is driven by the rotating shaft to rotate so that the gas enters and pushes the dynamic ring 19, so that the dynamic ring 19 pushes the static ring 20, so that it squeezes the push ring 22 and the O-ring 21, and at the same time squeezes the spring 24 to move it to the inside of the spring seat 23, so that the gas cannot leak, thereby protecting the gas to form a sealing layer to avoid gas leakage.
[0035] Working principle: When the device is needed, insert the sealing block 2 and the fixing plate 3 into the installation groove 12, insert the bolt 4 into the installation hole 5, and rotate it into the shaft sleeve 1 to install and fix it. After the lubricating oil is injected, rotate the rotating cover 6 to drive the threaded member 7 to screw into the sealing block 2, so that it presses the sealing ball 8 downward, and at the same time squeezes the moving plate 9 and the spring 11, so that the spring 11 generates a rebound force, and the sealing ball 8 blocks the top opening of the threaded member 7, thereby avoiding lubrication. Oil leakage leads to insufficient lubricating oil, which causes mechanical lubrication or lubrication failure, reducing the service life of the device; the rotating shaft and the sleeve 1 are clamped and fixed through the groove 15, and the sealing ring 16 seals the gas. When the gas enters through the upper air inlet of the sleeve 1, the sleeve 1 is driven by the rotating shaft to rotate, causing the moving ring 19 to push the static ring 20, so that it squeezes the push ring 22 and the O-ring 21, and at the same time squeezes the spring 24 to move it to the inside of the spring seat 23, so that the gas cannot leak, thereby achieving gas protection to form a sealing layer to avoid gas leakage.
[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A dry gas sealing device for a long-distance pipeline natural gas compressor, comprising a shaft sleeve (1), characterized in that: A sealing block (2) is arranged on the upper inner side of the shaft sleeve (1), and the left and right sides of the sealing block (2) are fixedly connected with fixed components, the inner side of the sealing block (2) is rotatably connected with a rotating cover (6), the bottom of the rotating cover (6) is fixedly connected with a threaded member (7), the inner side of the threaded member (7) is slidably connected with a sealing ball (8), the bottom of the sealing ball (8) is fixedly connected with a movable plate (9), the bottom of the movable plate (9) is fixedly connected with a spring (11), and the inner upper side of the shaft sleeve (1) is provided with a mounting groove (12), and the fixed component and the sealing block (2) are both slidably connected inside the mounting groove (12).
2. The dry gas sealing device for a long-distance pipeline natural gas compressor according to claim 1 is characterized in that: The fixing assembly comprises a fixing plate (3), a bolt (4) is arranged inside the fixing plate (3), a mounting hole (5) is opened inside the fixing plate (3), the bolt (4) is threadedly connected to the inside of the mounting hole (5), and the bolt (4) is threadedly connected to the inside of the shaft sleeve (1) through the mounting hole (5).
3. The dry gas sealing device for a long-distance pipeline natural gas compressor according to claim 1 is characterized in that: A slot (15) is provided on the left side of the interior of the shaft sleeve (1), a sealing ring (16) is provided on the right side of the slot (15), a positioning ring (17) is provided on the right side of the sealing ring (16), a locking sleeve (18) is fixedly connected to the right side of the positioning ring (17), a dynamic ring (19) is provided on the outside of the positioning ring (17), a static ring (20) is provided on the right side of the dynamic ring (19), a push ring (22) is provided on the right side of the static ring (20), a spring 2 (24) is fixedly connected to the right side of the push ring (22), one end of the spring 2 (24) is fixedly connected to a spring seat (23), the spring seat (23) is provided on the outside of the push ring (22), and an O-ring (21) is provided on the bottom of the push ring (22).
4. The dry gas sealing device for a long-distance pipeline natural gas compressor according to claim 3 is characterized in that: The O-ring (21) is arranged outside the positioning ring (17).
5. The dry gas sealing device for a long-distance pipeline natural gas compressor according to claim 3 is characterized in that: The spring seat (23) is arranged outside the locking sleeve (18).
6. The dry gas sealing device for a long-distance pipeline natural gas compressor according to claim 1, characterized in that: The threaded member (7) is threadedly connected inside the sealing block (2).
7. The dry gas sealing device for a long-distance pipeline natural gas compressor according to claim 1, characterized in that: An oil filling hole (14) is provided at the bottom of the installation groove (12), and the sealing ball (8) and the movable plate (9) are both slidably connected inside the oil filling hole (14).
8. The dry gas sealing device for a long-distance pipeline natural gas compressor according to claim 1, characterized in that: One end of the spring one (11) is fixedly connected to the bottom side of the inner wall of the oil filling hole (14), and the other end of the spring one (11) is fixedly connected to the bottom of the moving plate (9).