CN202926629U - Roots pump - Google Patents
Roots pump Download PDFInfo
- Publication number
- CN202926629U CN202926629U CN 201220551699 CN201220551699U CN202926629U CN 202926629 U CN202926629 U CN 202926629U CN 201220551699 CN201220551699 CN 201220551699 CN 201220551699 U CN201220551699 U CN 201220551699U CN 202926629 U CN202926629 U CN 202926629U
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- CN
- China
- Prior art keywords
- axle
- pump housing
- cover
- pump body
- pump
- 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 - Fee Related
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Abstract
The utility model discloses a Roots pump. The Roots pump comprises a pump body, wherein the top of the pump body is provided with an air inlet, the bottom of the pump body is provided with an air exhaust port I, one side of the pump body is provided with an air exhaust port II, a bypass valve is arranged in the pump body, two shafts parallel to each other are arranged in the pump body, fan blades are mounted on both shafts, the front and rear ends of each shaft are mounted on bearing seats through bearings, bearing covers are sleeved at the outer sides of the bearings, a front end cover and a rear end cover are respectively mounted at the front and rear ends of each shaft, sealing members are arranged between the shafts and the front end covers and between the shafts and the rear end covers, a front cover is connected to the front parts of the front end covers, a rear cover is connected to the rear parts of the rear end covers, shaft sleeves are arranged at the front ends of the shafts close to the front cover, the front ends of the shafts close to the front cover are fixed on shaft seal seats, and sealing components are arranged between the shafts and the shaft seal seats. The Roots pump has the advantages that the bypass valve is arranged in the pump body, thus the Roots pump has a gas overload protection function; and the mechanical seal performance of the pump body is good, thus the gas leakage is effectively prevented, and the pollution to oil due to the fact that the lubricating oil in an oil tank is sucked into a pump chamber is avoided.
Description
Technical field
The utility model relates to a kind of vacuum pump, relates in particular to a kind of Roots pump.
Background technique
Existing Roots pump utilizes screw action that lubricant oil is arrived in oil tank and reached sealing, exists clearance channel larger, open, when shutting down; easily the lubricant oil in fuel tank is sucked in pump chamber, do not reach seal action, only under running up; lubricant oil could be arrived in oil tank, thereby reach sealing effect, because the clearance channel of sealing place is larger; the normal operation meeting is arrived in fuel tank with them; easily pollute oil, simultaneously, bearing easily weares and teares; working life is short, the shortcoming that repair rate is high.Therefore, need to provide a kind of new technological scheme to solve the problems referred to above.
The model utility content
The purpose of this utility model is to provide the Roots pump of a kind of good airproof performance, long service life.
The technical solution adopted in the utility model is:
Roots pump, comprise the pump housing, described pump housing top is provided with suction port, described pump housing bottom is provided with the relief opening I, the described pump housing one side is provided with the relief opening II, be provided with bypass valve in the described pump housing, on the described pump housing, radiating fin is installed, be provided with two axles that are parallel to each other in the described pump housing, on two axles, fan blade is installed all, the rear and front end of every axle all is installed on bearing support by bearing, described bearing outside cover has bearing cap, front cover and rear end cover are equipped with respectively in the rear and front end of described axle, be equipped with sealing component between described axle and front cover and axle and rear end cover, the place ahead of described front cover is connected with protecgulum, the rear of described rear end cover is connected with bonnet, the close protecgulum of the front end of described axle place is provided with axle sleeve, the close protecgulum of the front end of described axle place is fixed on the shaft seal seat, be provided with Sealing between described axle and shaft seal seat, the front end of described axle is connected with coupling, described coupling and hexagonal elastomer block close contact, the rear end of described axle is equipped with gear, the rear end of described axle screws by fastening piece, described pump housing front end is provided with the motor link press span.
Described sealing component is seal ring.
Described Sealing is backbone sealing ring.
Described fastening piece is round nut.
The beneficial effects of the utility model: be provided with bypass valve in the pump housing, have the gas overload protection function, the mechanical sealing performance of this pump housing is good, has effectively stoped the leakage of gas.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the right elevation of Fig. 1.
Wherein: 1, motor link press span, 2, coupling, 3, the shaft seal seat, 4, protecgulum, 5, front cover, 6, the pump housing, 7, rear end cover, 8, seal ring, 9, gear, 10, bonnet, 11, fan blade, 12, axle, 13, relief opening I, 14, the relief opening II, 15, bypass valve, 16, suction port, 17, radiating fin, 18, round nut, 19, bearing support, 20, bearing, 21, bearing cap, 22, backbone sealing ring, 23, axle sleeve, 24, the hexagonal elastomer block.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
as illustrated in fig. 1 and 2, Roots pump of the present utility model, comprise the pump housing 6, the pump housing 6 tops are provided with suction port 16, the pump housing 6 bottoms are provided with relief opening I 13, the pump housing one side is provided with relief opening II 14, be provided with bypass valve 15 in the pump housing 6, radiating fin 17 is installed on the pump housing 6, be provided with two axles that are parallel to each other 12 in the pump housing 6, on two axles 12, fan blade 11 is installed all, the rear and front end of every axle 12 all is installed on bearing support 19 by bearing 20, bearing 20 outside covers have bearing cap 21, front cover 5 and rear end cover 7 are equipped with respectively in the rear and front end of axle 12, be equipped with seal ring 8 between axle 12 and front cover 5 and axle 12 and rear end cover 7, the place ahead of front cover 5 is connected with protecgulum 4, the rear of rear end cover 7 is connected with bonnet 10, the close protecgulum of the front end of axle 12 4 places are provided with axle sleeve 23, the close protecgulum of the front end of axle 12 4 places are fixed on shaft seal seat 3, be provided with backbone sealing ring 22 between axle 12 and shaft seal seat 3, the front end of axle 6 is connected with coupling 2, coupling 2 and hexagonal elastomer block 24 close contacts, the rear end of axle 6 is equipped with gear 9, the rear end of axle 6 screws by round nut 18, the pump housing 6 front ends are provided with motor link press span 1.
Be provided with bypass valve 15 in the pump housing, have the gas overload protection function, the mechanical sealing performance of this pump housing 6 is good, has effectively stoped the leakage of gas, has avoided the lubricant oil in the fuel tank to be inhaled in pump chamber, pollutes oil.
Claims (4)
1. Roots pump, comprise the pump housing, it is characterized in that: described pump housing top is provided with suction port, described pump housing bottom is provided with the relief opening I, the described pump housing one side is provided with the relief opening II, be provided with bypass valve in the described pump housing, on the described pump housing, radiating fin is installed, be provided with two axles that are parallel to each other in the described pump housing, on two axles, fan blade is installed all, the rear and front end of every axle all is installed on bearing support by bearing, described bearing outside cover has bearing cap, front cover and rear end cover are equipped with respectively in the rear and front end of described axle, be equipped with sealing component between described axle and front cover and axle and rear end cover, the place ahead of described front cover is connected with protecgulum, the rear of described rear end cover is connected with bonnet, the close protecgulum of the front end of described axle place is provided with axle sleeve, the close protecgulum of the front end of described axle place is fixed on the shaft seal seat, be provided with Sealing between described axle and shaft seal seat, the front end of described axle is connected with coupling, described coupling and hexagonal elastomer block close contact, the rear end of described axle is equipped with gear, the rear end of described axle screws by fastening piece, described pump housing front end is provided with the motor link press span.
2. Roots pump according to claim 1, it is characterized in that: described sealing component is seal ring.
3. Roots pump according to claim 1, it is characterized in that: described Sealing is backbone sealing ring.
4. Roots pump according to claim 1, it is characterized in that: described fastening piece is round nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220551699 CN202926629U (en) | 2012-10-26 | 2012-10-26 | Roots pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220551699 CN202926629U (en) | 2012-10-26 | 2012-10-26 | Roots pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202926629U true CN202926629U (en) | 2013-05-08 |
Family
ID=48216597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220551699 Expired - Fee Related CN202926629U (en) | 2012-10-26 | 2012-10-26 | Roots pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202926629U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979730A (en) * | 2012-10-26 | 2013-03-20 | 南通龙鹰真空泵业有限公司 | Roots pump |
-
2012
- 2012-10-26 CN CN 201220551699 patent/CN202926629U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979730A (en) * | 2012-10-26 | 2013-03-20 | 南通龙鹰真空泵业有限公司 | Roots pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20171026 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |