CN204458344U - A kind of air-cooled Roots vacuum pump - Google Patents
A kind of air-cooled Roots vacuum pump Download PDFInfo
- Publication number
- CN204458344U CN204458344U CN201420871384.XU CN201420871384U CN204458344U CN 204458344 U CN204458344 U CN 204458344U CN 201420871384 U CN201420871384 U CN 201420871384U CN 204458344 U CN204458344 U CN 204458344U
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- China
- Prior art keywords
- side wall
- air
- vacuum pump
- upper side
- roots vacuum
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Abstract
The utility model provides a kind of air-cooled Roots vacuum pump, belongs to the technical field of vacuum pump, can solve and reduce the noise that operationally produces of air-cooled Roots vacuum pump and vibration.The air-cooled Roots vacuum pump that the utility model proposes comprises the housing with suction port and air outlet, a pair lobed rotor is provided with in described housing, described housing side is also provided with and surrounds by upper side wall, lower wall, left side wall, right side wall the cooling vent formed, and described cooling vent place is provided with gas buffer portion.The utility model is applicable in the larger environment of pressure reduction.
Description
Technical field
The utility model belongs to the technical field of vacuum pump, particularly relates to a kind of air-cooled Roots vacuum pump.
Background technique
Roots pump refers to the lobed rotor of pump built with a pair opposite direction synchronous rotary, have slight gap and non-touching a kind of positive displacement vacuum pump between rotor, between rotor and pump housing endophragm, it is used for mobile gas and realize bleeding by a pair lobed rotor pushing that is synchronous, counterrotating in pump chamber.Roots pump works in low pressure range, and the free path of gas molecule is comparatively large, and the resistance that gas leaks through micro gap is very large, can obtain higher compression ratio, therefore, it is possible to use as booster vacuum pump.
Roots pump conveying and pressurized gas process in can produce heat, these heats must reach housing from rotor and distribute.But under low pressure, gas is to the conduction and convection performance extreme difference of heat, and the heat causing rotor to absorb not easily sheds, and causes temperature of rotor forever higher than the temperature of housing.Due to the thermal expansion of rotor, the gap between rotor and rotor, between rotor and pump case is reduced, especially when pressure reduction is also high, particularly seriously, even cause rotor stuck, pump is damaged.In order to make Roots pump work under higher pressure reduction, expanding using scope, increasing the reliability of pump, needing to cool to carry out thermolysis to rotor.
At present, the type of cooling of Roots pump mainly comprises air cooling mode, water-cooling pattern, oil cooling mode.For air-cooled Roots pump, normally rectangular cold air opening is set on the side of housing, when the cylindrical summit of rotor turns over cold air opening, outside gas enters in pump chamber in large quantities, can sudden surge be formed to pump chamber inside, produce higher operating noise and larger vibration.
Summary of the invention
The purpose of this utility model there are the problems referred to above for existing technology, proposes a kind of ventilation type vacuum pump, can reduce operating noise preferably, reduce vibration.
The purpose of this utility model realizes by following technical proposal:
A kind of air-cooled Roots vacuum pump, comprise the housing with suction port and air outlet, be provided with a pair lobed rotor in described housing, described housing side is also provided with and surrounds by upper side wall, lower wall, left side wall, right side wall the cooling vent formed, and described cooling vent place is provided with gas buffer portion.
Operationally, air enters in housing by suction port, by the rotation of lobed rotor, the air in housing is discharged by air outlet, when the cylindrical summit of lobed rotor turns over cooling vent, outside air enters from cooling vent, and because cooling vent place is provided with gas buffer portion, the air that therefore can enter cooling vent produces buffer function, reduce the impact to pump chamber inside, and then avoid producing higher operating noise and larger vibration.
At above-mentioned air-cooled Roots vacuum pump, described gas buffer portion is formed by described upper side wall, and described upper side wall comprises at least one inclined-plane.The opening area of the cooling vent of rectangular shape so compared to existing technology, the opening area of the bevelled cooling vent of tool is less, reduces the flow that gas enters, and it is to amass many processes less, to play buffer function preferably that gas is entered in pump chamber.
At above-mentioned air-cooled Roots vacuum pump, described upper side wall is formed by two inclined-planes.Now the upper side wall of cooling vent forms the structure of a triangle.
At above-mentioned air-cooled Roots vacuum pump, described upper side wall is formed by two inclined-planes and a plane, and described plane is between described two inclined-planes.Now the upper side wall of cooling vent forms the structure of a trapezoid shaped.
At above-mentioned air-cooled Roots vacuum pump, described upper side wall is formed by an inclined-plane and a plane.The left side wall of cooling vent or upper half part of right side wall and this inclined-plane and plane is made to form the structure of a trapezoid shaped like this.
At above-mentioned air-cooled Roots vacuum pump, described upper side wall is formed by an inclined-plane.Cooling vent entirety forms trapezoid shaped, and this inclined-plane forms trapezoidal hypotenuse.
At above-mentioned air-cooled Roots vacuum pump, described gas buffer portion is formed by described upper side wall, and described upper side wall comprises at least one curved surface.The opening area of the cooling vent of rectangular shape so compared to existing technology, the opening area with the cooling vent of curved surface is less, reduce the flow that gas enters, it is to amass many processes less that gas is entered in pump chamber, and curved surface itself also has good buffer function, therefore buffer function can be played to gas better.
At above-mentioned air-cooled Roots vacuum pump, described upper side wall is by a Surface forming.Now the entirety of cooling vent forms the structure of a similar arched door shape, because curved surface itself also has good buffer function, therefore can play buffer function to gas better.
At above-mentioned air-cooled Roots vacuum pump, described upper side wall is formed by a curved surface and a plane.
At above-mentioned air-cooled Roots vacuum pump, described upper side wall is by an inclined-plane and a Surface forming, and curved surface and inclined-plane combine and can produce better buffer function to gas, reduce the impact to pump chamber.
Compared with prior art, the beneficial effects of the utility model: owing to being provided with gas buffer portion at cooling vent place, therefore, it is possible to produce buffer function to the air that cooling vent enters, reduce the impact to pump chamber inside, operating noise can be reduced preferably and reduce operational vibration.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the air-cooled Roots vacuum pump that the utility model embodiment provides;
Fig. 2-Fig. 9 is that in the air-cooled Roots vacuum pump that provides of the utility model embodiment, cooling vent has difform schematic diagram.
Reference character:
1-housing, 10-air outlet, 11-suction port, 12-cooling vent, 120-gas buffer portion, 2-driving shaft, 3-driven shaft, 4-power rotor, 5-driven rotor.
Embodiment
Be below specific embodiment of the utility model and by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
As shown in Figure 1, air-cooled Roots vacuum pump disclosed in the utility model is applied in the larger environment of pressure reduction, its structure comprises housing 1, motor (not shown), driving shaft 2, driven shaft 3, driving gear (not shown), driven gear (not shown), power rotor 4, the driven rotor 5 with suction port 11 and air outlet 10, one end of driving shaft 2 is connected with motor by coupling, the other end is fixedly connected with driving gear, and the middle part of driving shaft 2 is provided with the power rotor 4 in 8-shaped; One end of driven shaft 3 is fixedly connected with driven gear, and driven gear engages with driving gear, and the middle part of driven tooth axle is provided with the driven rotor 5 in 8-shaped.The side of housing 1 is also provided with cooling vent 12, and cooling vent 12 place is provided with gas buffer portion 120.
Operationally, air enters in housing 1 by suction port 11, by the rotation of lobed rotor, the air in housing 1 is discharged by air outlet 10, when the cylindrical summit of lobed rotor turns over cooling vent 12, outside air enters from cooling vent 12, due to cooling vent 12, place is provided with gas buffer portion 120, the air that therefore can enter cooling vent 12 produces buffer function, reduce the impact to pump chamber inside, and then avoid producing higher operating noise and larger vibration, the working life of bearing can also be extended.
It should be noted that, in above-mentioned air-cooled Roots vacuum pump, the quantity of cooling vent 12 is two, and is arranged on two sides of housing 1 symmetrically.But do not get rid of the cooling vent 12 with greater number yet, in the present embodiment, only with two cooling vents 12 as an example, and be not limited to this.
Cooling vent 12 surrounds by upper side wall, lower wall, left side wall, right side wall the through-hole structure formed, wherein, upper side wall can comprise the structure at least one inclined-plane or comprise the structure of at least one curved surface, and this structure can form required gas buffer portion 120.The cooling vent of rectangular shape compared to existing technology, the opening area with the cooling vent 12 of inclined-plane or curved surface is less, reduced by the gas of cooling vent 12 in such unit time, gas is entered in pump chamber be one with long-pending many processes less, inclined-plane or curved surface also have buffer function simultaneously, therefore can avoid well producing the parts in pump chamber owing to entering a large amount of gas instantaneously suddenly impacting.
As shown in Figure 2, as a kind of optional scheme of the utility model embodiment, the upper side wall of cooling vent 12 is formed by two symmetrical inclined-planes, and at this moment the upper side wall of cooling vent 12 forms the structure of an isosceles triangle.
As shown in Figure 3, as the another kind of optional scheme of the utility model embodiment, the upper side wall of cooling vent 12 is formed by two symmetrical inclined-planes and a plane, and plane is between described two inclined-planes.Now the upper side wall of cooling vent 12 forms the structure of an isosceles trapezoid.
As shown in Figure 4, as another optional scheme of the utility model embodiment, the upper side wall of cooling vent 12 is formed by an inclined-plane and a plane.Now upper half part of the right side wall (or left side wall) of cooling vent 12 and this inclined-plane and plane form the structure of a right-angled trapezium.
As shown in Figure 5, as another optional scheme of the utility model embodiment, the upper side wall of cooling vent 12 is certainly as an inclined-plane.Whole like this cooling vent 12 forms the structure of a horizontal right-angled trapezium, and upper side wall forms this trapezoidal hypotenuse.
As shown in Figure 6 and Figure 7, as another optional scheme of the utility model embodiment, be a curved surface raised up or a curved surface to lower recess at the upper side wall of cooling vent 12.
As shown in Figure 8, as another optional scheme of the utility model embodiment, the upper side wall of cooling vent 12 is formed by a curved surface and a plane.
As shown in Figure 9, as another optional scheme of the utility model embodiment, the upper side wall of cooling vent 12 is by an inclined-plane and a Surface forming, and this curved surface and inclined-plane combine and can produce better buffer function to gas, reduce the impact to pump chamber.
In order to clearly the present embodiment is described further, below for the triangle structure shown in shape Fig. 2 of cooling vent 12, the working principle of this air-cooled Roots vacuum pump is specifically described.
Driving shaft 2 is driven to rotate during the work of motor, driving gear rotates with driving shaft 2, driving gear drives the rotation of driven gear and then drives the rotation of driven shaft 3, and the rotation of such driving shaft 2 and driven shaft 3 just can drive the rotation of power rotor 4 and driven rotor 5 respectively.Air enters in housing 1 by suction port 11, is discharged by the air in housing 1 by the rotation of a pair lobed rotor by air outlet 10.When lobed rotor cylindrical summit turns over cooling vent 12, outside air is by the cooling vent 12 of triangle, because this leg-of-mutton cooling vent 12 can play buffer function to the gas flowed into, therefore, it is possible to reduce gas to the impact of housing 1 inner chamber, reduce noise and vibration that air-cooled Roots vacuum pump operationally produces to a great extent.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Claims (10)
1. an air-cooled Roots vacuum pump, comprise the housing (1) with suction port (11) and air outlet (10), described housing is provided with a pair lobed rotor in (1), it is characterized in that, described housing (1) side is also provided with and surrounds by upper side wall, lower wall, left side wall, right side wall the cooling vent (12) formed, and described cooling vent (12) place is provided with gas buffer portion (120).
2. according to the air-cooled Roots vacuum pump that claim 1 is stated, it is characterized in that, described gas buffer portion (120) is formed by described upper side wall, and described upper side wall comprises at least one inclined-plane.
3. according to the air-cooled Roots vacuum pump that claim 2 is stated, it is characterized in that, described upper side wall is formed by two inclined-planes.
4. air-cooled Roots vacuum pump according to claim 2, is characterized in that, described upper side wall is formed by two inclined-planes and a plane, and described plane is between described two inclined-planes.
5. according to the air-cooled Roots vacuum pump that claim 2 is stated, it is characterized in that, described upper side wall is formed by an inclined-plane and a plane.
6. air-cooled Roots vacuum pump according to claim 2, is characterized in that, described upper side wall is formed by an inclined-plane.
7. air-cooled Roots vacuum pump according to claim 1, is characterized in that, described gas buffer portion (120) is formed by described upper side wall, and described upper side wall comprises at least one curved surface.
8. air-cooled Roots vacuum pump according to claim 7, is characterized in that, described upper side wall is by a Surface forming.
9. air-cooled Roots vacuum pump according to claim 7, is characterized in that, described upper side wall is formed by a curved surface and a plane.
10. the air-cooled Roots vacuum pump according to claim 2 or 7, is characterized in that, described upper side wall is by an inclined-plane and a Surface forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420871384.XU CN204458344U (en) | 2014-12-31 | 2014-12-31 | A kind of air-cooled Roots vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420871384.XU CN204458344U (en) | 2014-12-31 | 2014-12-31 | A kind of air-cooled Roots vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204458344U true CN204458344U (en) | 2015-07-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420871384.XU Expired - Fee Related CN204458344U (en) | 2014-12-31 | 2014-12-31 | A kind of air-cooled Roots vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204458344U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321441A (en) * | 2016-08-22 | 2017-01-11 | 中国航天空气动力技术研究院 | Self-cleaning cooling structure of Roots vacuum unit |
-
2014
- 2014-12-31 CN CN201420871384.XU patent/CN204458344U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321441A (en) * | 2016-08-22 | 2017-01-11 | 中国航天空气动力技术研究院 | Self-cleaning cooling structure of Roots vacuum unit |
| CN106321441B (en) * | 2016-08-22 | 2018-06-01 | 中国航天空气动力技术研究院 | The self-cleaning cooling mechanism of Roots vacuum system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160804 Address after: 317021, Zhejiang City, Taizhou province Yongquan Town, sand Lane Village Patentee after: Taizhou Xingguang Vacuum Equipment Co., Ltd. Address before: 318000 788 college, Jiaojiang District, Zhejiang, Taizhou Patentee before: Dai Yinghong Patentee before: Taizhou Vocational & Technical College |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20191231 |