CN212899716U - Mechanical sealing device for split type rotating machine bearing bush - Google Patents
Mechanical sealing device for split type rotating machine bearing bush Download PDFInfo
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- CN212899716U CN212899716U CN202021744549.9U CN202021744549U CN212899716U CN 212899716 U CN212899716 U CN 212899716U CN 202021744549 U CN202021744549 U CN 202021744549U CN 212899716 U CN212899716 U CN 212899716U
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- ring
- sealing
- sealing ring
- oil return
- seal
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Abstract
The utility model discloses a split type mechanical sealing device for a rotor bearing bush, which is arranged on two sides of the rotor bearing bush and comprises a sealing ring body, one end of the sealing ring body is provided with a flange, the flange is fixedly connected with the bearing bush, the sealing ring body is formed by butting an upper half ring and a lower half ring, at least 4 ring grooves are arranged in the sealing ring body along the axial ring at intervals of a rotating shaft, colored alloy sealing rings are embedded in the ring grooves, an oil return groove is formed between the sealing rings, the gap between the outermost sealing ring and the rotating shaft is not more than 0.1mm, the gap between the innermost sealing ring and the outermost sealing ring is sequentially increased, an oil return channel is arranged at the bottom end of the oil return groove of the lower half ring sealing ring body, the oil return channel is communicated with a storage groove of the bearing bush, the sealing gap gradually reduced from inside to outside of the utility model can not only prevent the, the sealing effect is ideal and stable, the structure is simple, and the service life is long.
Description
Technical Field
The utility model relates to a to open commentaries on classics quick-witted axle bush mechanical seal device.
Background
The known mechanical seal has two position forms at a dynamic part and a static part: one is contact type and one is non-contact type. The adopted materials comprise metal and nonmetal; the contact type generally adopts a non-metal material, and the non-contact type generally adopts a metal material. Contact sealing materials are easy to age and loosen, non-contact sealing gaps are large, and oil leakage is easy to occur.
Disclosure of Invention
The utility model aims at providing a to open commentaries on classics quick-witted axle bush mechanical seal device, quote non ferrous alloy to mechanical seal, because the hardness of the non ferrous alloy of selection is lower, relative and rotor between the sealing gap just be little. The device can adopt an infinite trend contact mode, namely, the contact gap infinitely trends to 0 and is larger than 0, so that a contact sealing state is achieved, and the arranged multi-layer sealing rings form a multi-channel sealing retaining wall, so that the lubricating oil leakage is effectively prevented.
In order to realize the purpose, the technical scheme of the utility model is that:
the utility model provides a to open change quick-witted axle bush mechanical seal device installs in change quick-witted axle bush both sides, is equipped with the sealed ring body of flange including one end, and the flange is connected fixedly with the axle bush, sealed ring body comprises last semi-ring and lower semi-ring butt joint, it is provided with 4 at least ring channels to revolute the axle interval along the axial ring in the sealing ring body, inlay the non ferrous alloy sealing ring in the ring channel, form the oil gallery between sealing ring and the sealing ring, the clearance of outside sealing ring and commentaries on classics axle is not more than 0.1mm, increases in proper order from the clearance of outside sealing ring to the most inboard sealing ring and commentaries on classics axle, is equipped with oil return channel in semi-ring body oil gallery bottom down.
The scheme is further as follows: the non-ferrous alloy is brass of H62.
The scheme is further as follows: the clearance between the outermost sealing ring and the innermost sealing ring and the rotary machine shaft is increased by 0.05mm in sequence.
The scheme is further as follows: the width of the sealing end face of the sealing ring is 0.3mm to 0.5mm, and the width of the sealing end face is connected with the end face, facing the bearing bush, of the sealing ring through an outward slope face of 60 degrees to 70 degrees.
The utility model has the advantages that: the sealing clearance of the sealing ring which is gradually reduced from inside to outside can not only prevent lubricating oil from overflowing when the rotary machine rotates, but also achieve the purpose of sealing when the rotary machine vibrates, and has ideal and stable sealing effect, simple structure and long service life.
The present invention will be described in detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a schematic view of the overall structure of the assembly of the present invention;
FIG. 2 is a schematic view of the sealing device of the present invention;
fig. 3 is a schematic view of the inside of the sealing device structure at the shaft side of the present invention.
Detailed Description
A mechanical sealing device for a split-type rotary machine bearing bush is shown in figures 1, 2 and 3, the sealing device is installed on two sides of a bearing bush 11 of a rotary machine shaft 1, as shown in figures 1 and 3, the sealing device comprises a sealing ring body 8 with a flange 802 arranged at one end, as shown in figure 1, the flange 8 of the sealing device at one end of the bearing bush 11 is directly connected and fixed with the bearing bush, the flange 8 of the sealing device at the other end of the bearing bush 11 is connected and fixed with the bearing bush 11 through an end cover 9, the bearing bush 11 is integrally connected on a bearing base 2, a rolling bearing 3 is fixed in the bearing bush 11, an oil filling opening 10 is formed in the upper end of the bearing bush 11, and a lubricating oil chamber 4 is arranged at. As shown in fig. 2 and 3, the sealing ring body is formed by butt joint of an upper half ring 801 and a lower half ring 802, at least 4 annular grooves are formed in the sealing ring body around a rotor shaft along an axial direction at intervals, a non-ferrous alloy sealing ring 7 is embedded in each annular groove, oil return grooves 803 and 6 are formed between each sealing ring and the corresponding sealing ring, the oil return grooves 803 and 6 are communicated with a lubricating oil chamber 4 of a bearing bush through oil return holes 5, a gap between the outermost sealing ring and the rotor shaft which is not close to the bearing bush 11 is not more than 0.1mm, the gap between the innermost sealing ring and the rotor shaft which is close to the bearing bush 11 is increased in sequence from the outermost sealing ring, an oil return channel is arranged at the bottom end of the oil return groove of the. Wherein: the non-ferrous alloy is brass of H62. The clearance between the outermost sealing ring and the innermost sealing ring and the rotary machine shaft is increased by 0.05mm in sequence. The width of the sealing end face of the sealing ring is 0.3mm to 0.5mm, and as shown in fig. 2, the width of the sealing end face is connected with the end face, facing the bearing bush, of the sealing ring through an outward slope surface 701 of 60 degrees to 70 degrees.
When the rotating machine shaft rotates, some splashed lubricating oil flows into the mechanical sealing device along the gaps between the bearing bush and the end cover and the main shaft. Under the obstruction of the first layer of H62 brass sealing ring, 70% -80% of lubricating oil flows into the main oil return hole along the oil return groove between the lower side cover and the oil return hole and flows back to the oil chamber of the bearing bush from the main oil return hole; the rest 20-30% of lubricating oil flows into the sealing device from a gap between the sealing end face of the first layer of H62 brass sealing ring and the main shaft, and 70-80% of the lubricating oil flowing into the second layer of sealing ring flows to the main oil return hole along the first layer and the second layer of bottom oil return holes under the obstruction of the second layer of sealing ring; only a relatively small amount of lubricating oil continuously overflows from the clearance between the second layer of sealing ring and the main shaft. When the lubricating oil which is discontinuous and flows slowly flows into the channels in the second layer of sealing ring and the third layer of sealing ring, the lubricating oil stored in the channels also flows back into the oil chamber of the bearing shell from the main oil return hole because the channels are lower than the main oil return hole; the first layer of lubricating oil and the second layer of lubricating oil overflow from the oil drop radially converge to the bottom main oil return hole by means of the gravity of the oil drop, but some lubricating oil splashed on the shaft can form an oil film on the shaft, the gap between the non-ferrous alloy of the third layer of sealing ring and the main shaft is further reduced so as to damage the oil film on the main shaft and keep the lubricating oil inside the third layer of sealing ring, and the gap between the fourth layer of sealing ring and the main shaft is further reduced to 0.1mm so as to prevent the instant oil level from abnormally increasing and exceeding the shaft diameter 1/2.
This embodiment introduces a non-ferrous alloy to the mechanical seal, and because of the low hardness of the non-ferrous alloy selected, the seal clearance with respect to the shaft is small. The device can adopt an infinite trend contact mode, namely, the contact gap infinitely trends to 0 and is larger than 0, so that a contact sealing state is achieved, and the arranged multi-layer sealing rings form a multi-channel sealing retaining wall, so that the lubricating oil leakage is effectively prevented.
Claims (4)
1. The utility model provides a to open change quick-witted axle bush mechanical seal device installs in change quick-witted axle bush both sides, is equipped with the sealed ring body of flange including one end, and the flange is connected fixedly with the axle bush, its characterized in that, sealed ring body comprises last semi-ring and lower semi-ring butt joint, it is provided with 4 at least ring channels to revolute the axle interval along the axial ring in the sealing ring body, inlay the non ferrous alloy sealing ring in the ring channel, form the oil return groove between sealing ring and the sealing ring, the clearance of outside sealing ring and the axle of changeing is not more than 0.1mm, increases in proper order from the clearance of outside sealing ring to the most inboard sealing ring and axle of changeing, is equipped with oil return channel in semi-ring sealed ring body oil return groove.
2. The sealing device of claim 1, wherein the non-ferrous alloy is H62 brass.
3. A seal arrangement according to claim 1, wherein the clearance from the outermost seal ring to the innermost seal ring increases by 0.05mm in order.
4. The seal arrangement of claim 1, wherein the seal ring has a seal end face width of 0.3mm to 0.5mm, the seal end face width engaging a bearing shell facing side end face of the seal ring by an outwardly facing sloped surface of 60 degrees to 70 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021744549.9U CN212899716U (en) | 2020-08-20 | 2020-08-20 | Mechanical sealing device for split type rotating machine bearing bush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021744549.9U CN212899716U (en) | 2020-08-20 | 2020-08-20 | Mechanical sealing device for split type rotating machine bearing bush |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212899716U true CN212899716U (en) | 2021-04-06 |
Family
ID=75246334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021744549.9U Active CN212899716U (en) | 2020-08-20 | 2020-08-20 | Mechanical sealing device for split type rotating machine bearing bush |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212899716U (en) |
-
2020
- 2020-08-20 CN CN202021744549.9U patent/CN212899716U/en active Active
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