CN212614895U - Combined mechanical lubricating oil sealing structure for micro-combustion engine - Google Patents
Combined mechanical lubricating oil sealing structure for micro-combustion engine Download PDFInfo
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- CN212614895U CN212614895U CN202021252383.9U CN202021252383U CN212614895U CN 212614895 U CN212614895 U CN 212614895U CN 202021252383 U CN202021252383 U CN 202021252383U CN 212614895 U CN212614895 U CN 212614895U
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Abstract
The utility model discloses a combination mechanical type lubricating oil seal structure for little combustion engine belongs to sealed technical field, including bearing frame and seal baffle, seal baffle passes through axial screwed connection with the bearing frame, still be equipped with the spiral sealing ring between the rotation axis at seal baffle and its place, be equipped with the graphite sealing ring between spiral sealing ring and the seal baffle, the graphite sealing ring is inlayed in seal baffle, the seal baffle outer end still is equipped with the sealing pad dish. According to the technical scheme, on one hand, the centrifugal force generated by high-speed rotation of the rotating shaft is utilized, and oil is sent back to the lubricating oil return port in a sealing mode of the double centrifugal oil throwers of the boss shaft shoulder and the sealing baffle plate, so that lubricating oil is prevented from leaking; on the other hand, the clearance formed by the matching of the spiral seal and the graphite seal ring is fully utilized, the lubricating oil is dynamically dropped and sent back to the lubricating oil return port, and the lubricating oil liquid is stored in a static state to prevent the lubricating oil from leaking.
Description
Technical Field
The utility model belongs to the technical field of it is sealed, a modular seal structure is related to, especially, relate to a combination mechanical type lubricating oil seal structure for little combustion engine.
Background
In the existing micro gas turbine and various gas turbines, the bearings installed on the rotor generate heat seriously due to the high rotating speed of the rotor. The bearing temperature is too high and can influence the life-span of bearing, in order to cool down for the bearing, need provide sufficient lubricating oil for the bearing to reduce the friction of bearing self, delay it and generate heat, simultaneously, provide sufficient lubricating oil for the bearing, also can play the effect of cooling to a certain extent. Therefore, during the operation of the bearing, the lubricating oil needs to be introduced into the bearing seat to lubricate the bearing, and the loss of the lubricating oil needs to be avoided or reduced as much as possible, so that the sealing design of the bearing seat needs to be considered to prevent the lubricating oil from leaking from the contact surface between the bearing seat and the rotor.
Through the retrieval, chinese utility model patent that application number is CN201920167717.3 discloses a sealed effectual bearing frame end cover for centrifugal fan, this technical scheme includes the main part, evenly distributed is in a plurality of bolt holes of main part periphery, the dead eye of setting in the main part, evenly distributed is in a plurality of oil gallery of dead eye periphery, the stop ring of setting in the main part, first sealing ring and the second sealing ring of setting in the main part, this technical scheme is through first sealing washer and second sealing washer cooperation, effectively prevent lubricating oil in the bearing frame from leaking from the gap between bearing frame end cover and the bearing frame, cooperation through stop ring and oil gallery, block lubricating oil and guide backward flow to in the bearing frame, reduce the lubricating oil leakage in the bearing frame. The technical scheme is the closest to the technical scheme of the application, but the internal structure of the technical scheme has a large difference.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a combination mechanical type lubricating oil seal structure for little combustion engine to solve the problem that miniature gas turbine and various gas turbine lubricating oil leaked.
The utility model discloses a realize through following technical scheme.
The utility model provides a combination mechanical type lubricating oil seal structure for little combustion engine, includes bearing frame and seal baffle, seal baffle passes through axial screwed connection with the bearing frame, still be equipped with the spiral sealing ring between the rotation axis at seal baffle and its place, be equipped with the graphite sealing ring between spiral sealing ring and the seal baffle, the graphite sealing ring is inlayed in seal baffle, the seal baffle outer end still is equipped with the sealing pad dish.
Furthermore, the edge of the bearing seat is also provided with a lubricating oil return hole.
Furthermore, the bearing seat inner cavity, the bearing installed on the rotating shaft and the boss shaft shoulder of the rotating shaft jointly form an annular oil return cavity, and the oil return cavity is communicated with the lubricating oil return hole.
Furthermore, the sealing pad disc is of a disc-shaped structure, the edge of the sealing pad disc is reversely buckled at the outer edge of the sealing baffle, the outer end faces of the sealing baffle, the graphite sealing ring and the spiral sealing ring are blocked, and the sealing pad disc is tightly attached to the end face of the spiral sealing ring.
Furthermore, the outer surface of the spiral sealing ring is spiral, and a spiral groove is formed between the spiral sealing ring and the graphite sealing ring.
The utility model has the advantages that:
the utility model discloses a combination mechanical type lubricating oil seal structure for micro-combustion engine, on one hand, utilize the centrifugal force that the high-speed rotation of rotation axis produced, through the sealed mode of boss shaft shoulder, the two centrifugal oil throwers of seal baffle, send fluid back to lubricating oil return opening department, prevent the lubricating oil leakage; on the other hand, the clearance formed by the matching of the spiral seal and the graphite sealing ring is fully utilized, the lubricating oil is dynamically sent back to the lubricating oil return port, and the lubricating oil liquid is stored statically to prevent the lubricating oil from leaking. This technical scheme can effectually prevent under the quiescent condition, the lubricating oil under the high-speed rotation state from leaking, and the effect is showing to the unbalanced time of bearing frame inside and outside atmospheric pressure, and its simple structure realizes easily, is applied to the rotating machinery of horizontal arrangement, more is suitable for under the condition that requires high to the lubricating oil leakage quantity.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1-rotating shaft, 2-sealing pad disc, 3-graphite sealing ring, 4-sealing baffle, 5-spiral sealing ring, 6-bearing seat, 7-bearing, 8-lubricating oil return hole and 9-boss shaft shoulder.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings, but the scope of protection claimed is not limited to the description.
As shown in figure 1, a combination mechanical type lubricating oil seal structure for little combustion engine, including bearing frame 6 and seal baffle 4, seal baffle 4 passes through axial screwed connection with bearing frame 6, still be equipped with spiral sealing ring 5 between seal baffle 4 and the rotation axis 1 at its place, be equipped with graphite sealing ring 3 between spiral sealing ring 5 and the seal baffle 4, graphite sealing ring 3 inlays in seal baffle 4, seal baffle 4 outer end still is equipped with sealing pad dish 2.
And the edge of the bearing seat 6 is also provided with a lubricating oil return hole 8 for returning lubricating oil.
The inner cavity of the bearing seat 6, the bearing 7 arranged on the rotating shaft 1 and the boss shaft shoulder 9 of the rotating shaft 1 jointly form an annular oil return cavity, and the oil return cavity is communicated with the lubricating oil return hole 8. The oil return cavity is used as a main cavity for returning lubricating oil.
The sealing pad disc 2 is of a disc-shaped structure, the edge of the sealing pad disc is reversely buckled at the outer edge of the sealing baffle 4, the outer end faces of the sealing baffle 4, the graphite sealing ring 3 and the spiral sealing ring 5 are blocked, the sealing pad disc is tightly attached to the end face of the spiral sealing ring 5, and the leakage of lubricating oil is further prevented.
The outer surface of the spiral sealing ring 5 is spiral, a spiral groove is formed between the spiral sealing ring 5 and the graphite sealing ring 3, and oil can flow back or be stored in the spiral groove through the spiral groove.
Examples
As shown in fig. 1, after entering the bearing seat 6, the lubricating oil lubricates the bearing 7 in a jet or oil mist form, a small amount of outward-diffused lubricating oil and oil gas contact the boss shoulder 9 of the rotating shaft 1 and are adsorbed on the surface of the boss shoulder 9, and are thrown onto the bearing seat 6 under the centrifugal action generated by the high-speed rotation of the boss shoulder 9, and then are discharged back to the lubricating oil tank through the lubricating oil return hole 8 of the bearing seat 6.
The remaining small amount of residual lubricating oil and lubricating oil mixed air continuously diffuse outwards and enter the spiral sealing ring 5, the spiral sealing ring 5 rotates along with the rotating shaft 1, an oil return channel formed by matching the spiral sealing ring 5 and the graphite sealing ring 3 prevents the residual lubricating oil and the lubricating oil mixed air from diffusing, the prevented lubricating oil returns to the contact position of the sealing baffle 4 and the boss shaft shoulder 9 through the oil return channel, and is thrown onto the bearing seat 6 under the centrifugal action generated by the high-speed rotation of the boss shaft shoulder 9 and then is discharged back to the lubricating oil tank through a lubricating oil return hole 8 of the bearing seat 6.
The residual extremely small amount of lubricating oil mixed air continues to diffuse outwards, contacts the sealing pad disc 2 which rotates at high speed together with the rotating shaft 1, is blocked by the sealing pad disc 2 to avoid leakage, lubricating oil drops flow back to the spiral sealing ring 5 along the sealing pad disc 2, the thrust generated along the spiral rotation of the spiral sealing ring 5 is sent back to the contact part of the sealing baffle plate 4 and the boss shaft shoulder 9, and under the centrifugal action generated by the high-speed rotation of the boss shaft shoulder 9, the lubricating oil mixed air is thrown to the bearing seat 6 and then is discharged back to the lubricating oil tank through the lubricating oil return hole 8 of the bearing seat 6.
The technical scheme can be applied to horizontally arranged rotating machinery and is applicable to the condition with high requirement on the leakage of lubricating oil.
The above-mentioned embodiments are merely exemplary, so as to enable those skilled in the art to better understand the technical solution, and should not be construed as limiting the scope of the present invention, and all modifications and simple substitutions made according to the technical solution of the present invention fall within the scope of the present invention.
Claims (5)
1. The utility model provides a combination mechanical type lubricating oil seal structure for little combustion engine, includes bearing frame (6) and seal baffle (4), seal baffle (4) pass through axial screwed connection with bearing frame (6), its characterized in that: still be equipped with spiral sealing ring (5) between rotation axis (1) at seal baffle (4) rather than place, be equipped with graphite sealing ring (3) between spiral sealing ring (5) and seal baffle (4), inlay in seal baffle (4) graphite sealing ring (3), seal baffle (4) outer end still is equipped with sealing pad dish (2).
2. The combined mechanical oil seal structure for a micro-combustion engine according to claim 1, characterized in that: and the edge of the bearing seat (6) is also provided with a lubricating oil return hole (8).
3. The combined mechanical oil seal structure for a micro-combustion engine according to claim 1, characterized in that: the bearing seat (6) inner cavity, the bearing (7) installed on the rotating shaft (1) and the boss shaft shoulder (9) of the rotating shaft (1) jointly form an annular oil return cavity, and the oil return cavity is communicated with the lubricating oil return hole (8).
4. The combined mechanical oil seal structure for a micro-combustion engine according to claim 1, characterized in that: the sealing pad disc (2) is of a disc-shaped structure, the edge of the sealing pad disc is reversely buckled at the outer edge of the sealing baffle (4), the outer end faces of the sealing baffle (4), the graphite sealing ring (3) and the spiral sealing ring (5) are blocked, and the sealing pad disc is tightly attached to the end face of the spiral sealing ring (5).
5. The combined mechanical oil seal structure for a micro-combustion engine according to claim 1, characterized in that: the outer surface of the spiral sealing ring (5) is spiral, and a spiral groove is formed between the spiral sealing ring (5) and the graphite sealing ring (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021252383.9U CN212614895U (en) | 2020-07-01 | 2020-07-01 | Combined mechanical lubricating oil sealing structure for micro-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021252383.9U CN212614895U (en) | 2020-07-01 | 2020-07-01 | Combined mechanical lubricating oil sealing structure for micro-combustion engine |
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| CN212614895U true CN212614895U (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021252383.9U Active CN212614895U (en) | 2020-07-01 | 2020-07-01 | Combined mechanical lubricating oil sealing structure for micro-combustion engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944547A (en) * | 2021-09-14 | 2022-01-18 | 中国航空工业集团公司沈阳飞机设计研究所 | Oil seal switch and oil supply and return pipeline system of turbine starter of aircraft engine |
| WO2022193362A1 (en) * | 2021-03-15 | 2022-09-22 | 玉环德谷新材料科技有限公司 | Roots vacuum pump |
-
2020
- 2020-07-01 CN CN202021252383.9U patent/CN212614895U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022193362A1 (en) * | 2021-03-15 | 2022-09-22 | 玉环德谷新材料科技有限公司 | Roots vacuum pump |
| CN113944547A (en) * | 2021-09-14 | 2022-01-18 | 中国航空工业集团公司沈阳飞机设计研究所 | Oil seal switch and oil supply and return pipeline system of turbine starter of aircraft engine |
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