Mechanical sealing mechanism for inner guide wheel
By designing a mechanical sealing mechanism for the inner guide wheel and adopting a double sealing structure, the problem that the traditional sealing structure cannot effectively block water entry is solved, achieving higher sealing effect and longer service life, and improving the safety of the equipment. and reliability.
Patent Information
- Application Number
- CN202420582260.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-25
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-03-25
AI Technical Summary
The traditional inner guide wheel adopts a combination structure of frame oil seal and bearings, which cannot effectively block the entry of water, resulting in rust of the bearing, which can easily lead to tilt of the bell cover, leakage of acetylene gas, causing explosions, and posing a huge safety hazard.
A mechanical seal mechanism for the inner guide wheel is designed, including an outer sealing unit and an inner sealing unit. The outer sealing unit is installed on the outside of the bearing, and the inner sealing unit is installed on the inside of the bearing. By rotating the lip seal ring, moving ring, static ring, spring seat and other components, double sealing is achieved to prevent water and gas leakage.
The double seal improves the sealing effect, extends the service life of the mechanical seal, reduces the frequency of maintenance and on-site environmental pollution, and improves the safety and reliability of the equipment.
Smart Images
Figure CN222377225U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a mechanical seal, in particular to a mechanical seal mechanism for an inner guide wheel. Background Art
[0002] The chemical plant adopts the calcium carbide into water type wet low-pressure acetylene generation process. The crude acetylene gas enters the acetylene gas tank for storage through a water seal, and then supplies acetylene gas to the entire plant.
[0003] The acetylene gas tank is used to balance the imbalance between the gas volume of the generator and the air intake volume of the compressor in a unit time, and stabilize the air intake volume of the compressor. The structure is a water tank type (wet) gas storage tank, which consists of three parts: a water tank, a movable tower section (bell), and a guide rail. The water tank is fixed and filled with water to seal the gas, and each tower section (bell) is movable up and down. When the gas storage volume increases, the tower section (bell) begins to rise to increase the gas storage space until the tower section (bell) rises to the highest position. The tower section (bell) moves up and down along the guide rail on the water tank by the surrounding guide wheels. The traditional guide wheel adopts a skeleton oil seal and a bearing combination structure for internal and external sealing. The outer guide wheel has an ideal service time in the air, but the inner guide wheel is immersed in water for a long time. The skeleton oil seal cannot completely block the entry of water. After the water enters, the bearing will rust. Once a guide wheel is rusted and stuck, it is very easy to cause the bell to tilt, acetylene gas to leak out, causing an explosion, and there are huge safety hazards. Utility Model Content
[0004] Therefore, in order to solve the above-mentioned deficiencies, the utility model provides a mechanical sealing mechanism for an inner guide wheel which is easy to install and reliable to use; the utility model can reduce the maintenance frequency and on-site environmental pollution, increase the service life of the equipment, and ensure the smooth progress of production.
[0005] Specifically, a mechanical sealing mechanism for an inner guide wheel, wherein the inner guide wheel is mounted on an equipment shaft through a bearing, and the bearing is mounted in a cavity of the inner guide wheel; the mechanical sealing mechanism comprises an outer sealing unit and an inner sealing unit mounted on the equipment shaft,
[0006] The inner sealing unit is installed in the inner guide wheel cavity and is located inside the bearing;
[0007] The outer sealing unit is installed on the outer side of the bearing and connected with the inner guide wheel.
[0008] Optionally, the inner sealing unit is a rotating lip sealing ring, which is pressed and tightly attached to the inner wall of the inner guide wheel by a pressure ring attached to the bearing.
[0009] Optionally, the outer sealing unit includes a dynamic ring, a static ring, a spring seat and a gland, and the gland is fixedly connected to the inner guide wheel.
[0010] A sealed cavity is formed in the gland;
[0011] The static ring is located in the sealing cavity and is installed on the gland through an anti-rotation pin. The static ring is sealed with the gland through an O-ring and maintains a certain gap with the equipment shaft;
[0012] The spring seat is mounted on the equipment shaft through a set screw and rotates synchronously with the equipment shaft.
[0013] The moving ring is installed on the spring seat through a plurality of spring assemblies and is in close contact with the stationary ring. The moving ring is transmission-connected with the spring seat and is located between the stationary ring and the bearing.
[0014] Optionally, the spring assembly includes a push ring and a plurality of springs acting on the push ring and installed on a spring seat, and the push ring is tightly attached to the moving ring.
[0015] Optionally, the spring seat is transmission-connected to the moving ring by means of a protrusion and a groove.
[0016] Optionally, a grease injection hole communicating with the sealing cavity is provided on the gland, and a screw plug is installed on the grease injection hole.
[0017] In the actual assembly of the mechanical sealing mechanism for the inner guide wheel, the rotating lip seal is pressed against the inner wall of the roller cavity, with the lip facing outward. The pressure ring and the bearing are installed in sequence, and the bearing is fixed to the shaft with a retaining ring; the spring seat is installed and fastened to the shaft with several set screws. In order to ensure that the spring reaches the designed compression amount, lines can be engraved on the shaft in advance; the spring, O-ring, push ring, and moving ring are installed in sequence, with the groove of the moving ring corresponding to the protrusion of the spring seat; the O-ring and static ring are installed in the pressure cover, with the notch of the static ring corresponding to the anti-rotation pin in the pressure cover; the pressure cover is then installed on the outside of the roller. During installation, the sealing gasket must be installed in the pressure cover first and fixed with several hexagon socket screws; grease is injected and the plug is installed.
[0018] The utility model has the following advantages:
[0019] The utility model has a reasonable design and ingenious structure. The sealing effect can be improved by sealing twice, which ensures that the mechanical seal can operate for a long period of time. Maintenance only requires regular grease injection, which greatly reduces maintenance, saves maintenance costs, increases the operating time of the inner guide wheel, and greatly improves the safety of equipment use. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the installation of the utility model and the inner guide wheel;
[0021] Figure 2 yes Figure 1 The K direction in the middle is a schematic diagram;
[0022] Figure 3This is a schematic diagram of the installation of the set screw;
[0023] Figure 4 yes Figure 1 A partial enlarged schematic diagram of N in the figure;
[0024] Figure 5 yes Figure 1 A partial enlarged schematic diagram of M in the middle;
[0025] In the figure: 1. Equipment shaft, 2. Gland, 3. Hexagon socket screw, 4. Sealing gasket, 5. Roller, 6. Retaining ring, 7. Bearing, 8. Pressing ring, 9. Rotating lip seal, 10. Spring seat, 11. Spring, 12. Push ring, 13. Moving ring, 14. Static ring, 15. Anti-rotation pin, 16. O-ring, 17. Set screw, 18. Screw plug. DETAILED DESCRIPTION
[0026] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.
[0027] In this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises", or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus.
[0028] As described in the background technology, the traditional guide wheel adopts a skeleton oil seal and a bearing combination structure for internal and external sealing. The outer guide wheel has an ideal service life in the air, but the inner guide wheel is immersed in water for a long time. The skeleton oil seal cannot completely block the entry of water. After the water enters, the bearing will rust. Once a guide wheel is rusted and stuck, it is very easy to cause the bell cover to tilt, acetylene gas to leak, causing an explosion, posing a huge safety hazard.
[0029] Therefore, based on the above reasons, Figure 1-Figure 5 As shown, this embodiment provides a mechanical sealing mechanism for an inner guide wheel, wherein the inner guide wheel 5 is mounted on the equipment shaft 1 through a bearing 7, and the bearing 7 is mounted in the cavity of the inner guide wheel 5; the mechanical sealing mechanism includes an outer sealing unit and an inner sealing unit mounted on the equipment shaft 1,
[0030] The inner sealing unit is installed in the inner guide wheel cavity and is located on the inner side of the bearing 7;
[0031] The outer sealing unit is installed on the outer side of the bearing 7 and connected to the inner guide wheel 5 .
[0032] Among the above technical features, the sealing effect can be improved by sealing twice, the maintenance frequency and on-site environmental pollution are reduced, the service life of the equipment is increased, and the smooth progress of production is ensured.
[0033] In one embodiment, the inner sealing unit is a rotating lip seal ring 9 , which is pressed and tightly attached to the inner wall of the inner guide wheel 5 by a pressure ring 8 attached to the bearing.
[0034] The outer sealing unit includes a dynamic ring 13, a static ring 14, a spring seat 10 and a gland 4. The gland is sealed by a sealing gasket 4 and is fixedly connected to the inner guide wheel 5 by a hexagon socket screw 3.
[0035] A sealing cavity is formed in the gland 2, a grease injection hole communicating with the sealing cavity is opened on the gland, and a screw plug 18 is installed on the grease injection hole.
[0036] The stationary ring 14 is located in the sealing cavity and is mounted on the gland 2 via the anti-rotation pin 15. The stationary ring 14 and the gland 2 are sealed via an O-ring 16 and maintain a certain gap with the equipment shaft 1.
[0037] The spring seat 10 is mounted on the device shaft 1 through a set screw 17 and rotates synchronously with the device shaft 1.
[0038] The dynamic ring 13 is installed on the spring seat 10 through a plurality of spring assemblies and is in close contact with the static ring 14 . The dynamic ring 13 is transmission-connected to the spring seat 10 and is located between the static ring 14 and the bearing 7 .
[0039] The spring assembly includes a push ring 12 and a plurality of springs 11 acting on the push ring 12 and installed on a spring seat 10 . The push ring 12 is tightly attached to the moving ring 13 .
[0040] In order to facilitate the transmission between the spring seat and the movable ring, in one embodiment, the spring seat is transmission-connected to the movable ring by means of a protrusion and a groove.
[0041] When in use, first, the bearing 7 is fixed between the shaft 1 and the roller 5 cavity, the outer ring is fixed by the pressure cover 2 and the pressure ring 8, and the inner ring is fixed by the shaft shoulder and the clamping ring 6; the rotating lip seal ring 9 close to the inner side of the bearing 7 is pressed against the wall of the roller 5 by the hexagon socket screw 3 to compress the bearing 7 and the pressure ring 8; on the outside of the bearing 7 is a mechanical seal, the static ring 14 of the mechanical seal is inserted into the pressure cover 2, the notch of the static ring 14 is aligned with the anti-rotation pin 15 in the pressure cover 2, and the O-ring 16 is used to achieve sealing; the spring seat 10 is fixed on the shaft 1 by the set screw 17, and there are several spring holes inside. The spring 11 is installed to push the push ring 12 to compress the dynamic ring 13 and the static ring 14 to fit tightly; the dynamic ring 13 is driven by the groove and the protrusion of the spring seat 10, and is sealed with the O-ring of the shaft 1 to achieve synchronous rotation with the shaft 1. (The outer thin wall of the spring seat 10 has an inward protrusion, and the dynamic ring 13 has a corresponding groove) In actual operation, the spring 10 is compressed, and the compression force pushes the end faces of the dynamic and static rings to fit together to achieve end face sealing, and the spring force maintains continuous thrust to achieve long-term contact.
[0042] The utility model designs a single-end-face external sealing unit on the outer side of the bearings at both ends of the equipment shaft. The static ring is kept stationary by the anti-rotation pin on the pressure cover; the dynamic ring is driven by the groove and the protrusion of the spring seat, and rotates with the equipment shaft; the spring pushes the push ring to compress the dynamic ring and the static ring to fit tightly, so as to achieve end-face sealing, prevent water around the inner guide wheel from entering the bearing cavity, and achieve long-term operation of the inner guide wheel. Secondly, a relatively simple seal such as a rotating lip seal is used on the inner side of the bearing (because leakage on the inside does not affect the long-term use of the inner guide wheel, but it is more wasteful of grease). The lip seal lip and the shaft are sealed to ensure that the grease in the bearing cavity will not leak, which ensures that the mechanical seal can operate for a long period of time. Maintenance only requires regular grease injection, which greatly reduces maintenance, saves maintenance costs, increases the operating time of the inner guide wheel, and greatly improves the safety of equipment use.
[0043] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A mechanical sealing mechanism for an inner guide wheel, wherein the inner guide wheel is mounted on the equipment shaft through a bearing, and the bearing is mounted in the inner guide wheel cavity; characterized in that: The mechanical sealing mechanism includes an outer sealing unit and an inner sealing unit installed on the equipment shaft. The inner sealing unit is installed in the inner guide wheel cavity and is located inside the bearing; The outer sealing unit is installed on the outer side of the bearing and connected with the inner guide wheel.
2. A mechanical sealing mechanism for an inner guide wheel according to claim 1, characterized in that: The inner sealing unit is a rotating lip sealing ring, which is pressed and tightly attached to the inner wall of the inner guide wheel by a pressure ring attached to the bearing.
3. A mechanical sealing mechanism for an inner guide wheel according to claim 1, characterized in that: The outer sealing unit includes a dynamic ring, a static ring, a spring seat and a gland, and the gland is fixedly connected to the inner guide wheel. A sealed cavity is formed in the gland; The static ring is located in the sealing cavity and is installed on the gland through an anti-rotation pin. The static ring is sealed with the gland through an O-ring and maintains a certain gap with the equipment shaft; The spring seat is mounted on the equipment shaft by means of a set screw and rotates synchronously with the equipment shaft; The moving ring is installed on the spring seat through a plurality of spring assemblies and is in close contact with the stationary ring. The moving ring is transmission-connected with the spring seat and is located between the stationary ring and the bearing.
4. A mechanical sealing mechanism for an inner guide wheel according to claim 3, characterized in that: The spring assembly comprises a push ring and a plurality of springs acting on the push ring and installed on a spring seat, and the push ring is tightly attached to the moving ring.
5. A mechanical sealing mechanism for an inner guide wheel according to claim 3, characterized in that: The spring seat is transmission-connected with the moving ring by means of protrusion and groove cooperation.
6. A mechanical sealing mechanism for an inner guide wheel according to claim 3, characterized in that: A grease injection hole communicated with the sealing cavity is provided on the gland, and a screw plug is installed on the grease injection hole.