Sealing device of mechanical fusion machine
By adopting a combination of maze seal, air seal and skeleton oil seal in the mechanical fusion machine, the problem of poor sealing effect of traditional sealing devices is solved, effective dust protection and bearing protection are achieved, and the reliability and service life of the equipment are improved. .
Patent Information
- Application Number
- CN202420059267.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-10
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-01-10
AI Technical Summary
The sealing effect between the rotating cylinder and the lower cylinder of the traditional fusion machine is poor, causing dust to enter the lower cylinder and damage the bearings, causing the equipment to shut down.
A mechanical fusion machine sealing device is designed, using a maze sealing mechanism as the first seal, and dust particles are prevented from passing through the radial and axial gaps of the stator annular disk and the rotor annular disk, and high-pressure gas is input as the first sealing tube. The second seal is combined with the skeleton oil seal and lubricating oil pipe as the third seal to ensure the sealing effect.
Effectively prevent dust from entering the bearing chamber, extend the service life of the equipment, prevent bearing damage, and improve sealing effect and equipment reliability.
Smart Images
Figure CN222255063U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a sealing device of a mechanical fusion machine. Background Art
[0002] The dust in the rotating cylinder of the traditional blending machine has a poor sealing effect with the lower cylinder and the main shaft, and it is easy to enter the lower part of the lower cylinder and then the bearing chamber into the bearing, damaging the bearing and causing the equipment to stop; such as CN
[0003] The fusion machine disclosed in 203971902U has a sealing device including a connecting sleeve sleeved on the central axis, an annular protrusion is provided on the outer surface of the connecting sleeve, a labyrinth seal is provided on the lower end surface of the annular protrusion, a first sealing ring and a second sealing ring are sequentially sleeved on the connecting sleeve located below the labyrinth seal, a lip-shaped sealing ring is provided between the inner walls of the first sealing ring and the second sealing ring and the corresponding connecting sleeve, a connected air inlet hole is provided on the first sealing ring and the second sealing ring, the air inlet hole on the second sealing ring is connected to the first high-pressure gas source, and the air outlet of the air inlet hole on the first sealing ring corresponds to the central axis. Although the sealing device can play a certain sealing role, after long-term use, the sealing effect is easily reduced, so that dust and the like enter the bearing chamber, causing bearing damage. Utility Model Content
[0004] In order to make up for the above shortcomings, the utility model provides a mechanical fusion machine sealing device with good sealing effect and capable of effectively preventing dust from entering the bearing.
[0005] The technical solution of the utility model is: a mechanical fusion machine sealing device is arranged between a rotating cylinder and a frame, the rotating cylinder is detachably fixedly mounted on a main shaft fixing sleeve, the frame is fixedly mounted with a lower shell body sleeved outside the rotating cylinder, the lower shell body is provided with a lower mounting through hole for the main shaft fixing sleeve to penetrate, there is a connecting key between the main shaft fixing sleeve and the main shaft, a limiting ring is provided in the middle part of the main shaft fixing sleeve, a lower mounting ring is fixedly mounted below the lower shell body, the center hole of the lower mounting ring and the mounting through hole are connected to each other, a labyrinth sealing mechanism is provided between the lower surface of the limiting ring and the lower mounting ring, a skeleton oil seal is provided between the center hole of the lower mounting ring and the main shaft fixing sleeve, the skeleton oil seal is located below the labyrinth sealing mechanism, and an oil seal lubricating oil pipe for supplying oil to the skeleton oil seal and an air seal pipe connected to the labyrinth sealing mechanism are also fixedly mounted on the frame.
[0006] As a preferred technical solution, the labyrinth sealing mechanism includes a stator annular disk and a rotor annular disk, the rotor annular disk is fixedly mounted on the lower surface of the limiting ring and is sleeved outside the main shaft fixing sleeve, the stator annular disk is fixedly mounted on the upper surface of the lower mounting ring and is sleeved outside the main shaft fixing sleeve, a sealing groove / sealing ring is opened on the outer side of the rotor annular disk, a sealing ring / sealing groove matching the sealing groove / sealing ring is provided on the stator annular disk, an annular gap is provided between the center hole of the stator annular disk and the main shaft fixing sleeve, and the air outlet of the airtight sealing tube is connected to the gap between the stator annular disk and the rotor annular disk.
[0007] As a preferred technical solution, the upper surface of the stator annular disk is provided with an inclined surface which is inclined downward toward the annular gap.
[0008] As a preferred technical solution, the lower surface of the rotor annular disk is provided with a protrusion located in the annular gap.
[0009] As a preferred technical solution, the protrusion is in the shape of an inverted frustum.
[0010] As a preferred technical solution, the skeleton oil seal includes an upper skeleton oil seal and a lower skeleton oil seal, a diverter ring is provided between the upper skeleton oil seal and the lower skeleton oil seal, an annular cavity is provided inside the diverter ring, the upper surface and the lower surface of the diverter ring are respectively provided with oil outlet holes connected to the annular cavity, and the outer peripheral surface of the diverter ring is also provided with an oil inlet connected to the oil seal lubricating oil pipe.
[0011] As a preferred technical solution, a diverter annular gap is provided between the wall of the central hole of the diverter ring and the main shaft fixing sleeve.
[0012] As a preferred technical solution, the main shaft is provided with a step surface located below the lower mounting ring, the main shaft is sleeved with a lower retaining ring, the lower surface of the lower retaining ring is attached to the step surface, the upper surface of the lower retaining ring is pressed against the lower end of the main shaft fixing sleeve, and the main shaft fixing sleeve is sleeved with a sleeve located between the upper surface of the lower retaining ring and the lower end surface of the inverted cone-shaped protrusion.
[0013] As a preferred technical solution, the skeleton oil seal is arranged between the sleeve and the center hole of the lower mounting ring, the diverter annular gap is provided between the center hole wall of the diverter ring and the sleeve, and an annular body is fixedly mounted on the outer peripheral surface of the lower retaining ring, and the upper surface of the annular body is a conical surface.
[0014] As a preferred technical solution, the upper surface of the annular body is a conical surface.
[0015] Due to the adoption of the above technical scheme, a mechanical fusion machine sealing device is provided between a rotating cylinder and a frame, the rotating cylinder is detachably fixedly mounted on a main shaft fixing sleeve, a lower shell body sleeved outside the rotating cylinder is fixedly mounted on the frame, a lower mounting through hole for the main shaft fixing sleeve to penetrate is provided on the lower shell body, a connecting key is provided between the main shaft fixing sleeve and the main shaft, a limiting ring is provided in the middle of the main shaft fixing sleeve, a lower mounting ring is fixedly mounted below the lower shell body, a center hole of the lower mounting ring and the mounting through hole are communicated with each other, a labyrinth sealing mechanism is provided between the lower surface of the limiting ring and the lower mounting ring, A skeleton oil seal is provided between the center hole of the lower mounting ring and the spindle fixing sleeve, and the skeleton oil seal is located below the labyrinth sealing mechanism. An oil seal lubricating oil pipe for supplying oil to the skeleton oil seal and an airtight sealing pipe connected to the labyrinth sealing mechanism are also fixedly installed on the frame; the labyrinth seal is used as the first seal, the rotating cylinder, the spindle fixing sleeve and the spindle rotate together, and the radial and axial clearances between the stator annular disk and the rotor annular disk are very small, which can effectively prevent the passage of dust particles; an airtight sealing is also used as the second seal, and the air outlet of the airtight sealing pipe is connected to the gap between the stator annular disk and the rotor annular disk. A certain pressure gas is input into the area between the stator annular disk and the rotor annular disk to reduce the probability of entering the upper part of the spindle fixing sleeve. A skeleton oil seal is provided between the center hole of the lower mounting ring and the spindle fixing sleeve as the third seal. The skeleton oil seal can be supplemented with lubricating oil through the oil seal lubricating oil pipe to prevent the oil seal from rubbing against the spindle fixing sleeve at high temperature and damaging the lip of the oil seal, thereby causing the oil seal to fail. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0017] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;
[0018] Figure 2 yes Figure 1 A partial enlarged view of position II in the middle;
[0019] Figure 3 yes Figure 1 A partial enlarged view of point I in the middle. DETAILED DESCRIPTION
[0020] like Figure 1 , Figure 2 and Figure 3As shown, a mechanical fusion machine sealing device is arranged between a rotating cylinder 1 and a frame 2, wherein the rotating cylinder 1 is detachably fixedly mounted on a spindle fixing sleeve 3, and a lower shell body 4 sleeved outside the rotating cylinder 1 is fixedly mounted on the frame 2, and a lower mounting through hole for the spindle fixing sleeve 3 to penetrate is provided on the lower shell body 4, and a connecting key is provided between the spindle fixing sleeve 3 and the spindle 5, and a limiting ring 6 is provided in the middle of the spindle fixing sleeve 3, and a lower mounting ring 7 is fixedly mounted below the lower shell body 4, and the center hole of the lower mounting ring 7 and the mounting through hole are communicated with each other, and a labyrinth sealing mechanism is provided between the lower surface of the limiting ring 6 and the lower mounting ring 7, and a skeleton oil seal is provided between the center hole of the lower mounting ring 7 and the spindle fixing sleeve 3, and the skeleton oil seal is located below the labyrinth sealing mechanism, and an oil seal lubricating oil pipe 8 for supplying oil to the skeleton oil seal and an airtight sealing pipe 26 connected to the labyrinth sealing mechanism are also fixedly mounted on the frame 2. The labyrinth sealing mechanism includes a stator annular disk 9 and a rotor annular disk 10. The rotor annular disk 10 is fixedly mounted on the lower surface of the limiting ring 6 and is sleeved outside the main shaft fixing sleeve 3. The stator annular disk 9 is fixedly mounted on the upper surface of the lower mounting ring 7 and is sleeved outside the main shaft fixing sleeve 3. A sealing groove 11 is opened on the outer side of the rotor annular disk 10. A sealing ring 12 matching the sealing groove 11 is provided on the stator annular disk 9. An annular gap 13 is provided between the center hole of the stator annular disk 9 and the main shaft fixing sleeve 3. The air outlet of the airtight sealing tube is connected to the gap between the stator annular disk 9 and the rotor annular disk 10.
[0021] A labyrinth seal is used as the first seal, the rotating cylinder and the main shaft fixing sleeve rotate together with the main shaft, and the radial and axial gaps between the stator annular disk 9 and the rotor annular disk 10 are very small, which can effectively prevent the passage of dust particles; an air seal is also used as the second seal, and the air outlet of the air seal pipe is connected to the gap between the stator annular disk 9 and the rotor annular disk 10. A certain pressure (0.2-0.5MPa) of gas is input into the area between the stator annular disk 9 and the rotor annular disk 10 to reduce the probability of entering the upper part of the main shaft fixing sleeve. A skeleton oil seal is provided between the center hole of the lower mounting ring 7 and the main shaft fixing sleeve 3 as the third seal. The skeleton oil seal can be supplemented with lubricating oil through the oil seal lubricating oil pipe 8 to prevent the oil seal from rubbing against the main shaft fixing sleeve at high temperature and damaging the lip of the oil seal, thereby causing the oil seal to fail.
[0022] As another embodiment, a sealing ring is provided on the outer side of the rotor annular disk 10, and a sealing groove cooperating with the sealing ring is provided on the stator annular disk.
[0023] like Figure 1 and Figure 3As shown, in order to better guide the airflow and improve the sealing effect, the upper surface of the stator annular disk 9 is provided with an inclined surface 14 which is inclined downward toward the annular gap 13 .
[0024] In order to make the lubricating oil play a better lubricating role, such as Figure 1 and Figure 2 As shown, the lower surface of the rotor annular disk 10 is provided with a protrusion 15 located in the annular gap 13. Preferably, the protrusion 15 is in the shape of an inverted frustum.
[0025] like Figure 1 , Figure 2 and Figure 3 As shown, the skeleton oil seal includes an upper skeleton oil seal 16 and a lower skeleton oil seal 17, a diverter ring 18 is arranged between the upper skeleton oil seal 16 and the lower skeleton oil seal 17, an annular cavity 19 is arranged inside the diverter ring 18, and an oil outlet 20 communicating with the annular cavity 19 is arranged on the upper surface and the lower surface of the diverter ring 18, respectively, and an oil inlet 21 communicating with the oil seal lubricating oil pipe 8 is also arranged on the outer peripheral surface of the diverter ring 18. Lubricating oil enters the annular cavity 19 through the oil inlet 21, and flows out from the oil outlet 20 through the annular cavity, so that the upper skeleton oil seal 16 and the lower skeleton oil seal 17 can be lubricated.
[0026] like Figure 1 , Figure 2 and Figure 3 As shown, a flow splitting annular gap 22 is provided between the wall of the central hole of the flow splitting ring 18 and the main shaft fixing sleeve 3 .
[0027] like Figure 1 , Figure 2 and Figure 3 As shown, the main shaft 5 is provided with a step surface 23 located below the lower mounting ring 7, and the main shaft 5 is sleeved with a lower retaining ring 24, the lower surface of the lower retaining ring 24 is attached to the step surface 23, and the upper surface of the lower retaining ring 24 is pressed against the lower end of the main shaft fixing sleeve 3, and the main shaft fixing sleeve 3 is sleeved with a sleeve 25 located between the upper surface of the lower retaining ring 24 and the lower end surface of the inverted frustum-shaped protrusion 15. The sleeve plays a limiting role, so that the stator annular disk 9 and the rotor annular disk 10 can maintain a certain gap. The sleeve can also protect the main shaft fixing sleeve and the main shaft, thereby preventing the skeleton oil seal from wearing the main shaft.
[0028] like Figure 1 , Figure 2 and Figure 3As shown, the skeleton oil seal is arranged between the sleeve 25 and the center hole of the lower mounting ring 7, the flow splitting annular gap 22 is arranged between the center hole wall of the flow splitting ring 18 and the sleeve 25, and an annular body 27 is fixedly mounted on the outer peripheral surface of the lower retaining ring 24. The setting of the flow splitting annular gap enables the lubricating oil to flow between the upper skeleton oil seal 16 and the lower skeleton oil seal 17 through the flow splitting annular gap, so that the lubrication effect is better. The annular body 27 and the lower retaining ring 24 are an integrated structure.
[0029] To further prevent dust from entering the bearing, Figure 1 As shown, the upper surface of the annular body 27 is a conical surface.
[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A mechanical fusion machine sealing device, arranged between a rotating cylinder and a frame, characterized in that: The rotating cylinder can be detachably fixed on the main shaft fixing sleeve, and a lower shell body sleeved on the outside of the rotating cylinder is fixedly installed on the frame, and a lower mounting through hole for the main shaft fixing sleeve to penetrate is provided on the lower shell body, and a connecting key is provided between the main shaft fixing sleeve and the main shaft, and a limiting ring is provided in the middle part of the main shaft fixing sleeve, and a lower mounting ring is fixedly installed below the lower shell body, and the center hole of the lower mounting ring and the mounting through hole are connected to each other, and a labyrinth sealing mechanism is provided between the lower surface of the limiting ring and the lower mounting ring, and a skeleton oil seal is provided between the center hole of the lower mounting ring and the main shaft fixing sleeve, and the skeleton oil seal is located below the labyrinth sealing mechanism, and an oil seal lubricating oil pipe for supplying oil to the skeleton oil seal and an airtight sealing pipe connected to the labyrinth sealing mechanism are also fixedly installed on the frame.
2. The mechanical fusion machine sealing device according to claim 1, characterized in that: The labyrinth sealing mechanism includes a stator annular disk and a rotor annular disk, the rotor annular disk is fixedly mounted on the lower surface of the limiting ring and sleeved outside the main shaft fixing sleeve, the stator annular disk is fixedly mounted on the upper surface of the lower mounting ring and sleeved outside the main shaft fixing sleeve, a sealing groove / sealing ring is opened on the outer side of the rotor annular disk, a sealing ring / sealing groove matching with the sealing groove / sealing ring is provided on the stator annular disk, an annular gap is provided between the center hole of the stator annular disk and the main shaft fixing sleeve, and the air outlet of the airtight sealing tube is connected to the gap between the stator annular disk and the rotor annular disk.
3. The mechanical fusion machine sealing device according to claim 2, characterized in that: The upper surface of the stator annular disk is provided with an inclined surface which is inclined downward toward the annular gap.
4. The mechanical fusion machine sealing device according to claim 2, characterized in that: The lower surface of the rotor annular disk is provided with a protrusion located in the annular gap.
5. The mechanical fusion machine sealing device according to claim 4, characterized in that: The protrusion is in the shape of an inverted frustum.
6. The mechanical fusion machine sealing device according to claim 4, characterized in that: The skeleton oil seal comprises an upper skeleton oil seal and a lower skeleton oil seal, a diverter ring is arranged between the upper skeleton oil seal and the lower skeleton oil seal, an annular cavity is arranged inside the diverter ring, the upper surface and the lower surface of the diverter ring are respectively provided with oil outlet holes connected with the annular cavity, and the outer peripheral surface of the diverter ring is also provided with an oil inlet connected with the oil seal lubricating oil pipe.
7. The mechanical fusion machine sealing device according to claim 6, characterized in that: A flow-dividing annular gap is provided between the wall of the central hole of the flow-dividing ring and the main shaft fixing sleeve.
8. The mechanical fusion machine sealing device according to claim 7, characterized in that: The main shaft is provided with a step surface below the lower mounting ring, and a lower retaining ring is sleeved on the main shaft. The lower surface of the lower retaining ring is attached to the step surface, and the upper surface of the lower retaining ring is pressed against the lower end of the main shaft fixing sleeve. The main shaft fixing sleeve is sleeved between the upper surface of the lower retaining ring and the lower end surface of the inverted frustum-shaped protrusion.
9. The mechanical fusion machine sealing device according to claim 8, characterized in that: The skeleton oil seal is arranged between the sleeve and the center hole of the lower mounting ring, the diverter annular gap is arranged between the hole wall of the center hole of the diverter ring and the sleeve, and an annular body is fixedly mounted on the outer peripheral surface of the lower retaining ring.
10. The mechanical fusion machine sealing device according to claim 9, characterized in that: The upper surface of the annular body is a conical surface.