CN209370457U - Air compressor shaft end reduced pressure sealing structure - Google Patents
Air compressor shaft end reduced pressure sealing structure Download PDFInfo
- Publication number
- CN209370457U CN209370457U CN201821835291.6U CN201821835291U CN209370457U CN 209370457 U CN209370457 U CN 209370457U CN 201821835291 U CN201821835291 U CN 201821835291U CN 209370457 U CN209370457 U CN 209370457U
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- Prior art keywords
- seal
- rotor
- oil
- shaft end
- air compressor
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Abstract
The utility model discloses a kind of good air compressor shaft end reduced pressure sealing structures of sealing effect, including the rotor being arranged in cylinder block, bearing block and sealing cover are provided with by bearing shell in one end of rotor, gap between bearing shell inner wall and rotor is connected, oilhole is provided in bearing shell, the annular groove being connected with oilhole is provided between bearing shell and bearing block, annular groove is connected with the oil duct being arranged in bearing block, oil duct is connected with the main oil gallery being arranged in cylinder block, pressure letdown chamber is provided between the rotor outer side seal lid and bearing block, the rear end of the pressure letdown chamber is provided with rear seal, the front end of the pressure letdown chamber is provided with spacer ring, front seal is provided between the spacer ring and rotor, the tracting pressuring hole and oil return hole being interconnected with pressure letdown chamber are respectively arranged in the spacer ring, the oil return hole It is connected with the drainback passage being provided in bearing block.
Description
Technical field
The utility model relates to air compressor technical field more particularly to a kind of air compressor shaft end reduced pressure sealing knots
Structure.
Background technique
The oil leak of air compressor shaft end is the trouble that air compressor user is frequently encountered, once oil leak will shadow significantly
Ring the stability of air compressor.Because air compressor belongs to high pressure axial seal, axial seal those skilled in the art is mentioned
Member can expect oil sealing and O-ring seal, although oil sealing sealing performance cannot bear high pressure very well, when unit pressure is excessive
The lip of axle envelope will be turned over, and cause largely to leak.Application of the O-ring seal in axial seal is also immature at present.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of good air compressor shaft end decompressions of sealing effect
Sealing structure.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is: the decompression of air compressor shaft end is close
Seal structure is provided with bearing block and sealing cover by bearing shell in one end of rotor including the rotor being arranged in cylinder block,
Gap between bearing shell inner wall and rotor is connected, and oilhole is provided in bearing shell, be provided between bearing shell and bearing block with
The annular groove that oilhole is connected, annular groove are connected with the oil duct being arranged in bearing block, oil duct and the master being arranged in cylinder block
Oil duct is connected, and is provided with pressure letdown chamber between the rotor outer side seal lid and bearing block, sets in the rear end of the pressure letdown chamber
It is equipped with rear seal, the front end of the pressure letdown chamber is provided with spacer ring, is provided with front seal between the spacer ring and rotor,
It is respectively arranged with the tracting pressuring hole and oil return hole being interconnected with pressure letdown chamber in the spacer ring, the oil return hole and is provided with bearing
Drainback passage in seat is connected, and the shaft end high pressure chest being connected with tracting pressuring hole is provided between the spacer ring and bearing block,
The shaft end high pressure chest is connected with the gap being arranged between bearing shell inner wall and rotor.
In order to better solve above-mentioned technical problem, the further technical solution that the utility model uses is: described preceding close
Sealing is O-ring seal, and the rear seal is oil sealing.
In order to better solve above-mentioned technical problem, the further technical solution that the utility model uses is: described preceding close
Sealing and the rear seal are O-ring seal.
In order to better solve above-mentioned technical problem, the further technical solution that the utility model uses is: described preceding close
Sealing is oil sealing, and the rear seal is O-ring seal.
In order to better solve above-mentioned technical problem, the further technical solution that the utility model uses is: described preceding close
Sealing and the rear seal are oil sealing.
The utility model has the advantages that: vent is arranged, before and after use in above-mentioned air compressor shaft end reduced pressure sealing structure
Two seals make front and back two seals part respectively share receiving a part, achieve the effect that reduced pressure sealing.Sealing effect is good, uses
Service life is long, easy to maintenance, and O-ring seal is made to obtain mature application on the shaft end seal of air compressor, reduces air compression
Machine shaft end seals cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model air compressor shaft end reduced pressure sealing structure.
In figure: 1, cylinder block, 2, rotor, 3, bearing shell, 4, bearing block, 5, sealing cover, 6, oilhole, 7, annular groove, 8, oil duct,
9, main oil gallery, 10, pressure letdown chamber, 11, rear seal, 12, spacer ring, 13, front seal, 14, tracting pressuring hole, 15, oil return hole, 16, return
Oily channel, 17, shaft end high pressure chest.
Specific embodiment
The particular content of the utility model is described in detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, air compressor shaft end reduced pressure sealing structure, including the rotor 2 being arranged in cylinder block 1,
One end of rotor 2 is provided with bearing block 4 and sealing cover 5 by bearing shell 3, and the gap between bearing shell inner wall and rotor 2 is connected,
Be provided with oilhole 6 in bearing shell 3, be provided with the annular groove 7 being connected with oilhole 6 between bearing shell 3 and bearing block 4, annular groove 7 with set
The oil duct 8 set in bearing block 4 is connected, and oil duct 8 is connected with the main oil gallery 9 being arranged in cylinder block 1, in the rotor
It is provided with pressure letdown chamber 10 between 2 outer side seal lids 5 and bearing block 4, the rear end of the pressure letdown chamber 10 is provided with rear seal 11,
The front end of the pressure letdown chamber 10 is provided with spacer ring 12, front seal 13 is provided between the spacer ring 12 and rotor 2, in institute
State the tracting pressuring hole 14 and oil return hole 15 for being respectively arranged in spacer ring 12 and being interconnected with pressure letdown chamber 10, the oil return hole 15 and setting
There is the drainback passage 16 in bearing block 4 to be connected, is provided between the spacer ring 12 and bearing block 4 and is connected with tracting pressuring hole 14
Shaft end high pressure chest 17, the shaft end high pressure chest 17 is connected with the gap being arranged between bearing shell inner wall and rotor 2.
In actual use, the front seal 13 and rear seal 11 can be selected O-shaped close according to the needs of use
Seal and oil sealing, specific selection mode have following four kinds:
The first: the front seal 13 is O-ring seal, and the rear seal 11 is oil sealing.
Second: the front seal 13 and the rear seal 11 are O-ring seal.
The third: the front seal 13 is oil sealing, and the rear seal 11 is O-ring seal.
4th kind: the front seal 13 and the rear seal 11 are oil sealing.
As shown in Figure 1, above-mentioned air compressor shaft end reduced pressure sealing structure is in use, include being arranged in cylinder block 1
Rotor 2, bearing block 4 and sealing cover 5 are provided with by bearing shell 3 in one end of rotor 2, between bearing shell inner wall and rotor 2
Gap is connected, and oilhole 6 is provided in bearing shell 3, and the annular groove being connected with oilhole 6 is provided between bearing shell 3 and bearing block 4
7, annular groove 7 is connected with the oil duct 8 being arranged in bearing block 4, and oil duct 8 is connected with the main oil gallery 9 being arranged in cylinder block 1
It is logical, it is provided with pressure letdown chamber 10 between the 2 outer side seal lid 5 of rotor and bearing block 4, is arranged in the rear end of the pressure letdown chamber 10
There is rear seal 11, the front end of the pressure letdown chamber 10 is provided with spacer ring 12, before being provided between the spacer ring 12 and rotor 2
Sealing element 13 is respectively arranged with the tracting pressuring hole 14 and oil return hole 15 being interconnected with pressure letdown chamber 10 in the spacer ring 12, described
Oil return hole 15 is connected with the drainback passage 16 being provided in bearing block 4, be provided between the spacer ring 12 and bearing block 4 with
The shaft end high pressure chest 17 that tracting pressuring hole 14 is connected, the shaft end high pressure chest 17 and between being arranged between bearing shell inner wall and rotor 2
Gap is connected.
High pressure oil in main oil gallery 9 is entered through the oil duct 8 of bearing block 4 in the annular groove 7 at 3 back of bearing shell, the high pressure in annular groove 7
Oilhole 6 of the oil in bearing shell 3 enters in the gap between bearing shell inner wall and rotor 2, in 2 rotary course of rotor, high pressure
Oil plays the role of lubrication, cooling, anti-attrition to bearing shell 2 and rotor 6.Then high pressure oil passes through between bearing shell inner wall and rotor 2
Gap enters shaft end high pressure chest 17, and at this moment mounted in first of defence front seal 13 in spacer ring 12, sealing first comes from bearing shell 3
High pressure oil, but the effect that at this moment road pressure Tai great Qian sealing element 13 holds high pressure is deformed very much.Therefore this patent is in spacer ring
It is provided with tracting pressuring hole 14 on 12, a part of oil pressure is introduced into pressure letdown chamber 10 by tracting pressuring hole 14, the pressure of 13 front and back of front seal
Difference is cancelled out each other, and that the oil pressure actually born will be small is more, and then has haved the function that reduced pressure sealing.Into pressure letdown chamber
The oil pressure of 10 rear ends will reduce, and be sealed by rear seal 11, this part oil passes through in oil return hole 15 and bearing block 4
Drainback passage 16 returns in the inlet chamber of air compressor machine, to realize entire complete oil circulation.
Oil sealing can be used in front seal 13 and rear seal 11, it is possible to use O-ring seal uses O-ring seal knot
Structure can be simpler, and entire installation dimension can reduce, the different materials how much O-ring seal can be selected according to heatproof, in contrast
The optional material of envelope is with regard to single more, and O-ring seal is available everywhere as sealing general part, the valence of O-ring seal
Lattice are more much lower than the price of oil sealing.
Claims (5)
1. air compressor shaft end reduced pressure sealing structure, including the rotor (2) being arranged in cylinder block (1), in rotor (2)
One end is provided with bearing block (4) and sealing cover (5) by bearing shell (3), and the gap between bearing shell inner wall and rotor (2) is connected
It is logical, oilhole (6) are provided in bearing shell (3), the ring being connected with oilhole (6) is provided between bearing shell (3) and bearing block (4)
Slot (7), annular groove (7) are connected with the oil duct (8) being arranged in bearing block (4), and oil duct (8) and setting are in cylinder block (1)
Main oil gallery (9) be connected, it is characterised in that: be provided between the rotor (2) outer side seal lid (5) and bearing block (4)
Pressure letdown chamber (10) is provided with rear seal (11) in the rear end of the pressure letdown chamber (10), sets in the front end of the pressure letdown chamber (10)
Spacer ring (12) are equipped with, front seal (13) are provided between the spacer ring (12) and rotor (2), are divided in the spacer ring (12)
Be not provided with pressure letdown chamber (10) be interconnected tracting pressuring hole (14) and oil return hole (15), the oil return hole (15) be provided with axis
The drainback passage (16) held in seat (4) is connected, and is provided between the spacer ring (12) and bearing block (4) and tracting pressuring hole (14)
The shaft end high pressure chest (17) being connected, the shaft end high pressure chest (17) and the gap being arranged between bearing shell inner wall and rotor (2)
It is connected.
2. air compressor shaft end reduced pressure sealing structure described in accordance with the claim 1, it is characterised in that: the front seal
It (13) is O-ring seal, the rear seal (11) is oil sealing.
3. air compressor shaft end reduced pressure sealing structure described in accordance with the claim 1, it is characterised in that: the front seal
(13) and the rear seal (11) is O-ring seal.
4. air compressor shaft end reduced pressure sealing structure described in accordance with the claim 1, it is characterised in that: the front seal
It (13) is oil sealing, the rear seal (11) is O-ring seal.
5. air compressor shaft end reduced pressure sealing structure described in accordance with the claim 1, it is characterised in that: the front seal
(13) and the rear seal (11) is oil sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821835291.6U CN209370457U (en) | 2018-11-08 | 2018-11-08 | Air compressor shaft end reduced pressure sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821835291.6U CN209370457U (en) | 2018-11-08 | 2018-11-08 | Air compressor shaft end reduced pressure sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209370457U true CN209370457U (en) | 2019-09-10 |
Family
ID=67836193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821835291.6U Active CN209370457U (en) | 2018-11-08 | 2018-11-08 | Air compressor shaft end reduced pressure sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209370457U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109237026A (en) * | 2018-11-08 | 2019-01-18 | 周琦人 | Air compressor shaft end reduced pressure sealing structure |
-
2018
- 2018-11-08 CN CN201821835291.6U patent/CN209370457U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109237026A (en) * | 2018-11-08 | 2019-01-18 | 周琦人 | Air compressor shaft end reduced pressure sealing structure |
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