CN201412341Y - Main shaft sealing and isolating structure of Roots blower - Google Patents
Main shaft sealing and isolating structure of Roots blower Download PDFInfo
- Publication number
- CN201412341Y CN201412341Y CN2009200336159U CN200920033615U CN201412341Y CN 201412341 Y CN201412341 Y CN 201412341Y CN 2009200336159 U CN2009200336159 U CN 2009200336159U CN 200920033615 U CN200920033615 U CN 200920033615U CN 201412341 Y CN201412341 Y CN 201412341Y
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- CN
- China
- Prior art keywords
- main shaft
- roots blower
- end plate
- sealing
- axle sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a manufacturing technology of a Roots blower and discloses a main shaft sealing and isolating structure of the Roots blower. The main shaft sealing and isolating structurecomprises an end plate for transporting gas and lubricating oil in an isolating mode, wherein the end plate is provided with a shaft hole for running through a main shaft in a sliding mode. The mainshaft sealing and isolating structure is characterized in that a front sealing device and a rear sealing device which are arranged between the main shaft and the end plate and positioned in the shafthole, and the shaft hole is radially provided with an exhaust hole which is positioned between the front sealing device and the rear sealing device.
Description
Technical field
The utility model relates to the Roots blower manufacturing technology, particularly a kind of main shaft seal isolation structure of Roots blower.
Background technique
In Roots blower is made, its shaft sealing is primarily aimed at the axial leakage of institute's conveying gas and lubricant oil, when lubricating oil pressure during greater than gas pressure, lubricant oil can leak to conveying gas, thereby cause the pollution of loss of lubrication and conveying gas, when lubricating oil pressure during less than gas pressure, conveying gas can be to oil leak, thereby causes the lubricant oil abnormal temperature rise.Address this problem at present, have and adopt simple oil sealing and gap sealed labyrinth seal, but its sealing effect be unsatisfactory, and and be not durable; Adopt mechanical seal or similar sealing configuration form in addition, increased manufacture difficulty and cost, also increased maintenance difficulty simultaneously.
Summary of the invention
The purpose of this utility model is at above-mentioned the deficiencies in the prior art, proposes a kind of main shaft seal isolation structure of Roots blower, can take into account practicability and validity effectively, has guaranteed the mutual isolation of conveying gas and lubricant oil, avoids influencing each other.
In order to achieve the above object, the present invention is achieved by the following technical solutions.
A kind of main shaft seal isolation structure of Roots blower, comprise the end plate of isolating conveying gas and lubricant oil, offering on the end plate slides runs through the axis hole of main shaft, it is characterized in that, be provided with the forward and backward seal arrangement that is positioned at axis hole between main shaft and the end plate, aperture axis is to offering exhaust port, and exhaust port is between forward and backward seal arrangement.
Further improvement of the utility model is: described seal arrangement comprises the sealing axle sleeve that is arranged on the main shaft and tensioner in the piston ring of axis hole, and described sealing axle sleeve periphery offers annular groove, and piston ring is positioned at groove.Of the present utility model further the improvement is: the shared sealing axle sleeve of described forward and backward seal arrangement.
Be provided with the forward and backward seal arrangement that is positioned at axis hole between main shaft of the present utility model and the end plate, aperture axis is to offering exhaust port, and exhaust port is between forward and backward seal arrangement, the sealing function of conveying gas and lubricant oil is isolated mutually,, can release in surrounding environment by exhaust port even the oil gas of lubricant oil is revealed, can not pollute conveying gas, equally, the leakage of conveying gas also directly is thrown into surrounding environment, can not be pressed in the lubricant oil.And the utility model adopts sealing axle sleeve and piston ring to cooperate, and realizes the sealing of conveying gas and lubricant oil respectively, and is simple in structure, convenient.
Description of drawings
Fig. 1 is the schematic representation of a kind of main shaft seal isolation structure of the present utility model, wherein: 1, end plate; 2, piston ring; 3, main shaft; 4, sealing axle sleeve.
Embodiment
With reference to Fig. 1, a kind of Roots blower main shaft seal isolation structure of the present utility model mainly comprises end plate 1, sealing axle sleeve 4, two piston rings 2 and main shafts 3.End plate 1 is isolated conveying gas and lubricant oil, and offering on the end plate 1 slides runs through the axis hole of main shaft 3, and the external part of main shaft connects impeller.Sealing axle sleeve 4 is fixed on the main shaft 3 with the interference fit form, and the higher high-abrasive material of sealing axle sleeve 4 usefulness hardness (for example 35CrMo, its surface of contact surface carburization) processes; Piston ring 2 usefulness spring steel process, and tensioner is in the shaft hole inner wall of end plate 1, and end plate 1 is static relatively.The periphery of sealing axle sleeve 4 offers forward and backward bipassage ring connected in star, and two piston rings 2 lay respectively in the forward and backward bipassage ring connected in star, and paste mutually with the sidewall of annular groove, and sealing axle sleeve 4 and piston ring 2 relatively rotate, thereby forms the two-layer sealing of sound.Aperture axis is to offering exhaust port, exhaust port is between forward and backward seal arrangement, the separate cavities of the band exhaust port of two-layer sealing of this sound and centre, the axial leakage of very well having realized Roots blower institute's conveying gas and lubricant oil can not influence each other, guarantee the pure of conveying gas, avoided the danger of the undesired loss of lubricant oil.
Claims (3)
1, a kind of main shaft seal isolation structure of Roots blower, comprise the end plate of isolating conveying gas and lubricant oil, offering on the end plate slides runs through the axis hole of main shaft, it is characterized in that, be provided with the forward and backward seal arrangement that is positioned at axis hole between main shaft and the end plate, aperture axis is to offering exhaust port, and exhaust port is between forward and backward seal arrangement.
2, the main shaft seal isolation structure of a kind of Roots blower according to claim 1, it is characterized in that, described seal arrangement comprises the sealing axle sleeve that is arranged on the main shaft and tensioner in the piston ring of axis hole, and described sealing axle sleeve periphery offers annular groove, and piston ring is positioned at groove.
3, the main shaft seal isolation structure of a kind of Roots blower according to claim 2 is characterized in that, the shared sealing axle sleeve of described forward and backward seal arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200336159U CN201412341Y (en) | 2009-06-19 | 2009-06-19 | Main shaft sealing and isolating structure of Roots blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200336159U CN201412341Y (en) | 2009-06-19 | 2009-06-19 | Main shaft sealing and isolating structure of Roots blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201412341Y true CN201412341Y (en) | 2010-02-24 |
Family
ID=41714225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200336159U Expired - Lifetime CN201412341Y (en) | 2009-06-19 | 2009-06-19 | Main shaft sealing and isolating structure of Roots blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201412341Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103122858A (en) * | 2011-11-18 | 2013-05-29 | 宜兴优纳特机械有限公司 | Composite sealing device of Roots blower end cover |
| CN106762652A (en) * | 2016-12-12 | 2017-05-31 | 无锡吴创环境科技有限公司 | Roots blower combined sealing structure |
-
2009
- 2009-06-19 CN CN2009200336159U patent/CN201412341Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103122858A (en) * | 2011-11-18 | 2013-05-29 | 宜兴优纳特机械有限公司 | Composite sealing device of Roots blower end cover |
| CN106762652A (en) * | 2016-12-12 | 2017-05-31 | 无锡吴创环境科技有限公司 | Roots blower combined sealing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100224 |
|
| CX01 | Expiry of patent term |