CN103671109A - Prismatic rod vacuum pump - Google Patents
Prismatic rod vacuum pump Download PDFInfo
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- CN103671109A CN103671109A CN201410015456.5A CN201410015456A CN103671109A CN 103671109 A CN103671109 A CN 103671109A CN 201410015456 A CN201410015456 A CN 201410015456A CN 103671109 A CN103671109 A CN 103671109A
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Abstract
The invention discloses a prismatic rod vacuum pump, which belongs to the technical field of the variable capacity vacuum equipment. The prismatic rod vacuum pump comprises a rotor and a pump case, wherein a thwartwise-8-shaped pump cavity is arranged in the pump case, and the rotor is installed in the pump cavity. The prismatic rod vacuum pump is characterized in that the rotor is divided into a main rotor and an auxiliary rotor of which the axes are mutually parallel; the main rotor is provided with two double wedges which are circumferentially evenly distributed; the molded surfaces of the double wedges are parallel with the axis of the main rotor; the auxiliary rotor is provided with three grooves which are circumferentially evenly distributed; the molded surfaces of the groves are parallel with the axis of the auxiliary rotor; the double wedges and the grooves are mutually meshed; the revolving speed ratio of the main rotor to the auxiliary rotor is 3/2. According to the prismatic rod vacuum pump disclosed by the invention, the volume of the pump cavity can be changed by the rotation of the main rotor and the auxiliary rotor, the compression of conveyed gas is realized, the volume efficiency can be improved, and the compression ratio is enabled to reach 40%. Meanwhile, the residual gas of each exhaust is reduced to 10%. In addition, no waste water or gas is generated in the working process.
Description
Technical field
The invention belongs to variable-capacity vacuum equipment technical field, be specifically related to a kind of rib bar vacuum pump.
Background technique
Along with the development of vacuum technique, its application constantly expands, and has been widely used in each industrial fields such as machinery, chemical industry, pharmacy, food, papermaking, the energy, Aero-Space.Yet, the current vacuum pump using in a lot of fields, the same before almost with 30 years with in structure in principle, there is no the variation of what essence.Wherein, in rough vacuum field, being widely used is water ring vaccum pump, water injection vacuum pump and reciprocating pump.
Water ring vaccum pump and water injection vacuum pump are due to the needs water medium of working, on the one hand, its performance depends on water saturation vapor tension, so the temperature of working water directly affects vacuum pump performance, when water temperature is higher, the working efficiency of pump can be very low, so under many circumstances, have to add cooling equipment, reduce water temperature; On the other hand, in the process of pressurized gas, gas heat radiation, working solution is subject to thermal evaporation, usings water as working solution in the process of exhaust in addition, consumes a large amount of water resourcess, and in industries such as chemical industry, water resources is produced to serious pollution.
Reciprocating pump be divided into active chamber have oil and without oil two kinds.On the one hand, there is oily reciprocating pump can produce a large amount of oil vapour pollutions when exhaust, do not meet the requirement of environmental protection; On the other hand, no matter have still very easily damaging without oily reciprocating pump its piston ring, air valve assembly when extracting a large amount of condensable gas of oil, complicated driving mechanism, causes the operation stability of this pump poor in addition, easily damaged parts is many, and operation and maintenance cost is higher.
Also has a kind of Roots pump simple in structure, by the rotation of roots rotor, carry gas, but its in the process of carrying gas without interior compression function, can not be by compressing to gas pressurized, make the gas of relief opening smoothly discharged in atmosphere, can only be as a kind of vacuum pump of auxiliary type.If reach degree of vacuum more than 0.05MPa, and must be in the situation that fore pump be extracted into corresponding limit pressure difference, Roots pump could start, thereby improves the degree of vacuum of fore pump.
Therefore,, in rough vacuum field, need a energy independent operating and environment protection type vacuum pump simple in structure.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of rib bar vacuum pump, and its environmental protection also can work alone.
For solving the problems of the technologies described above, technological scheme of the present invention is: design a kind of rib bar vacuum pump, comprise rotor and pump case, in pump case, be provided with the pump chamber of " ∞ " type, rotor is arranged in pump chamber, it is characterized in that: rotor is divided into main rotor and the secondary rotor that axis is parallel to each other, main rotor is provided with circumferentially two uniform double wedges, the profile of double wedge parallels with the axis of main rotor, secondary rotor is provided with circumferentially three uniform grooves, the profile of groove parallels with the axis of secondary rotor, and double wedge is meshed with groove, and the rotating ratio of main rotor and secondary rotor is 3/2.
Preferably, the radius of pump chamber is L, and the distance of shaft centers of main rotor and secondary rotor is M;
The profile of main rotor is symplex structure, AB, BC, CD and DE four arcs, consists of:
AB section: be positioned on the axis of main rotor, round X1 that radius is L in the center of circle;
DE section: on the round X2 that is M-L at, radius concentric with X1;
BC section: be positioned in the center of circle on the round X3 of end surface symmetric line of main rotor, the radius of X3 is 0.35～0.45L, a side and the X1 of X3 are tangent or crossing, opposite side and X2 intersect;
CD section: the round X4 that is 0.5L ~ 0.6L at radius is upper, X4 is simultaneously mutually circumscribed with X2 and X3;
The profile of secondary rotor is envelope, and this envelope is revolved round the sun on revolution circle by main rotor and rotation draws, revolution is 2/3 with the rotating ratio of autobiography; Revolution circle take the axle center of secondary rotor as the center of circle, M is radius.
Preferably, between main rotor and secondary rotor, by synchromesh gear, be connected.
Preferably, the front-end and back-end correspondence of pump case arranges front end-plate and end plate, the front end of rotor through front end-plate be arranged in front roll bearing assembly, rear end is arranged in rear rolling bearing assembly through end plate.
Preferably, the arranged outside protecgulum of front end-plate, protecgulum and front end-plate surround front lubricating cavity; The arranged outside bonnet of end plate, bonnet and end plate surround rear lubricating cavity.
Preferably, the rolling bearing in front roll bearing assembly is the fixing positioning bearing of Internal and external cycle, and the rolling bearing in rear rolling bearing assembly is that inner ring can axially movable bearing.
Preferably, between front end-plate and end plate and rotor, seal ring is installed.
Preferably, also comprise water-cooling jacket, water-cooling jacket is communicated with front cover, front end-plate, pump case sidewall, end plate and rear end cover successively.
Compared with prior art, the invention has the beneficial effects as follows:
1, from the characteristics of motion of roots rotor, main rotor mainly completes the function that compression is bled, and body that secondary rotor is bled can not produce compression, mainly plays the effect of auxiliary main rotor sealing and compression.Main rotor is provided with circumferentially two uniform double wedges, the profile of double wedge parallels with the axis of main rotor, secondary rotor is provided with circumferentially three uniform grooves, the profile of groove parallels with the axis of secondary rotor, double wedge is meshed with groove, and the rotating ratio of main rotor and secondary rotor is 3/2, can improve volumetric efficiency, make compression ratio reach 40%, the residual gas of simultaneously each exhaust reduces to 10%.
2, the molded line structure of main rotor and secondary rotor can increase the area of contact of itself and pump case, improves sealing effect, contributes to further to improve the compression ratio of vacuum pump, reaches higher degree of vacuum.
3, owing to being connected by synchromesh gear between main rotor and secondary rotor, simplify under the prerequisite of its drive mechanism, improve the harmony that main rotor and secondary rotor rotate.
4, owing to being provided with front lubricating cavity and rear lubricating cavity, can put into lubricant oil, synchromesh gear, front roll bearing assembly and rear rolling bearing assembly are played to good lubrication, extend its working life.
5, because the rolling bearing in front roll bearing assembly is the fixing positioning bearing of Internal and external cycle, rolling bearing in rear rolling bearing assembly is that inner ring can axially movable bearing, make the rear end of rotor can axial stretching, solve it in compressed-air actuated process, be heated and the demand that expands to space.
6,, owing to seal ring being installed between front end-plate and end plate and rotor, the lubricant oil before and after can preventing in lubricating cavity enters pump chamber, thereby has avoided the pollution of lubricant oil to air.
7,, owing to being provided with water-cooling jacket, can take away the heat that air discharges due to compression.
8, the present invention is a kind of simple in structure, can by pressurized air, reach the environment protection type vacuum equipment of higher degree of vacuum, is convenient to apply in rough vacuum field.
Accompanying drawing explanation
Fig. 1 is cross-sectional configuration schematic diagram of the present invention;
Fig. 2 is the molded line structure figure of main rotor;
The middle-size and small-size structural representation of Fig. 3;
Fig. 4 is large scale structure schematic diagram;
Fig. 5 is breathing process one schematic diagram;
Fig. 6 is breathing process two schematic diagram;
Fig. 7 is sealing drive-in step one schematic diagram;
Fig. 8 is sealing drive-in step two schematic diagram;
Fig. 9 is compression process one schematic diagram;
Figure 10 is compression process two schematic diagram;
Figure 11 is exhaust process one schematic diagram;
Figure 12 is exhaust process two schematic diagram.
Mark in figure: 1, pump case; 2, water-cooling jacket; 3, secondary rotor; 4, main rotor; 5, suction port;
6, relief opening; 7, pump chamber; 8, front end-plate; 9, end plate; 10, seal ring; 11, synchromesh gear;
12, front roll bearing assembly; 13, rear rolling bearing assembly; 14, protecgulum; 15, bonnet.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
The present invention has the rotor of rib bar structure because of it, therefore called after rib bar vacuum pump.
The present invention is defined as fore-and-aft direction by the length direction of rotor, and the side near pump chamber 7 is defined as to inner side, correspondingly the side away from pump chamber 7 is defined as to outside.
As shown in Figure 1, in pump case 1 of the present invention, be provided with the pump chamber 7 of " ∞ " type, the rotor being arranged in pump chamber 7 is divided into main rotor 4 and the secondary rotor 3 that axis is parallel to each other, and main rotor 4 is provided with circumferentially two uniform double wedges, and the profile of double wedge parallels with the axis of main rotor 4, as shown in Figure 2, its profile is symplex structure, AB, BC, CD and DE four arcs, consists of, and the radius of pump chamber 7 of take is below L, main rotor 4 is that M is example with the distance of shaft centers of secondary rotor 3, illustrates:
AB section: on circle X1, the center of circle of X1 is positioned on the axis of main rotor 4, and radius is L;
DE section: on circle X2, X2 and X1 are concentric, and the radius of X2 is M-L;
BC section: be positioned in the center of circle on the round X3 of end surface symmetric line of main rotor 4, the radius of X3 is 0.35～0.45L, a side and the X1 of X3 are tangent or crossing, opposite side and X2 intersect;
CD section: on circle X4, the radius of X4 is 0.5L ~ 0.6L, and X4 is simultaneously mutually circumscribed with X2 and X3.
In order to reduce center of gravity of the present invention, make it when high rotating speed, there is good stability.As shown in Figure 3 and Figure 4, pump case 1 adopts horizontal type structure, and main rotor 4 and secondary rotor 3 are horizontal laying state in pump case 1.And at the front end of pump case 1, front end-plate 8 is set, rear end arranges end plate 9, the front end of rotor through front end-plate 8 be arranged in front roll bearing assembly 12, rear end is arranged in rear rolling bearing assembly 13 through end plate 9.The arranged outside protecgulum 14 of front end-plate 8, protecgulum 14 surrounds front lubricating cavity with front end-plate 8; The arranged outside bonnet 15 of end plate 9, bonnet 15 surrounds rear lubricating cavity with end plate 9, can put into lubricant oil, and synchromesh gear 11, front roll bearing assembly 12 and rear rolling bearing assembly 13 are played to good lubrication, extends its working life.Rolling bearing in front roll bearing assembly 12 is the fixing positioning bearing of Internal and external cycle, rolling bearing in rear rolling bearing assembly 13 is that inner ring can axially movable bearing, make the rear end of rotor can axial stretching, solve it in compressed-air actuated process, be heated and the demand that expands to space.Between front end-plate 8 and end plate 9 and rotor, seal ring 10 is installed, the lubricant oil before and after can preventing in lubricating cavity enters pump chamber 7, thereby has avoided the pollution of lubricant oil to air.
In order to improve the stability of vacuum pump operation, be provided with the water-cooling jacket 2 that is communicated with successively front cover, front end-plate 8, pump case 1 sidewall, end plate 9 and rear end cover, the temperature of the heat of compression producing with cooling pumped gas and reduction pump oil, thereby prevent that rotor is out of shape stuck drawback because of the heat of compression, improves its greasy property by reducing the oil temperature of lubricant oil simultaneously.
Working procedure of the present invention is as follows:
As shown in Figure 7 and Figure 8, along with main rotor 4 and 3 rotations of secondary rotor, the gas of sealing, gradually away from suction port 5 positions, advances to relief opening 6 positions, enters sealing and drive-in step.In this process, the volume of confining gas does not change.
As shown in Figure 9 and Figure 10, main rotor 4 and secondary rotor 3 are rotated further, and the space that main rotor 4, secondary rotor 3 and pump case 1 inwall surround diminishes gradually, and the gas of sealing is compressed gradually, enters compression process.
As shown in Figure 11 and Figure 12, when the groove UNICOM above-mentioned space diminishing gradually of secondary rotor 3, the gas pressure of sealing reaches the highest, under the effect of pressure, through relief opening 6, discharges smoothly, completes exhaust process, completes an operation cycle.Main rotor 4 rotates once week and can complete 2 operation cycles.
So by the engagement in rotation of the interior main rotor 4 of pump case 1 and secondary rotor 3, change the size of cavity volume, realize the entering of gas, advance, compression and exhaust process, thereby obtain certain degree of vacuum and volume flowrate at suction port 5.As calculated, the present invention can independently reach the degree of vacuum of 5000Pa, and reaches in 40% at compression ratio, and the residual gas of each exhaust is only 10%, and exhaust effect is improved well.And in this process, main rotor 4 and secondary rotor 3 do not exist axial force, and simple in structure, be convenient to safeguard.
The above, be only preferred embodiment of the present invention, is not the present invention to be done to the restriction of other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not depart from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (8)
1. a rib bar vacuum pump, comprise rotor and pump case, in pump case, be provided with the pump chamber of " ∞ " type, rotor is arranged in pump chamber, it is characterized in that: rotor is divided into main rotor and the secondary rotor that axis is parallel to each other, main rotor is provided with circumferentially two uniform double wedges, the profile of double wedge parallels with the axis of main rotor, and secondary rotor is provided with circumferentially three uniform grooves, and the profile of groove parallels with the axis of secondary rotor, double wedge is meshed with groove, and the rotating ratio of main rotor and secondary rotor is 3/2.
2. according to rib bar vacuum pump claimed in claim 1, it is characterized in that: the radius of pump chamber is L, the distance of shaft centers of main rotor and secondary rotor is M;
The profile of main rotor is symplex structure, AB, BC, CD and DE four arcs, consists of:
AB section: be positioned on the axis of main rotor, round X1 that radius is L in the center of circle;
DE section: on the round X2 that is M-L at, radius concentric with X1;
BC section: be positioned in the center of circle on the round X3 of end surface symmetric line of main rotor, the radius of X3 is 0.35～0.45L, a side and the X1 of X3 are tangent or crossing, opposite side and X2 intersect;
CD section: the round X4 that is 0.5L ~ 0.6L at radius is upper, X4 is simultaneously mutually circumscribed with X2 and X3;
The profile of secondary rotor is envelope, and this envelope is revolved round the sun on revolution circle by main rotor and rotation draws, revolution is 2/3 with the rotating ratio of autobiography; Revolution circle take the axle center of secondary rotor as the center of circle, M is radius.
3. according to rib bar vacuum pump claimed in claim 2, it is characterized in that: between main rotor and secondary rotor, by synchromesh gear, be connected.
4. according to the arbitrary described rib bar vacuum pump of claims 1 to 3, it is characterized in that: the front-end and back-end correspondence of pump case arranges front end-plate and end plate, the front end of rotor through front end-plate be arranged in front roll bearing assembly, rear end is arranged in rear rolling bearing assembly through end plate.
5. according to rib bar vacuum pump claimed in claim 4, it is characterized in that: the arranged outside protecgulum of front end-plate, protecgulum and front end-plate surround front lubricating cavity; The arranged outside bonnet of end plate, bonnet and end plate surround rear lubricating cavity.
6. according to rib bar vacuum pump claimed in claim 5, it is characterized in that: the rolling bearing in front roll bearing assembly is the fixing positioning bearing of Internal and external cycle, the rolling bearing in rear rolling bearing assembly is that inner ring can axially movable bearing.
7. according to rib bar vacuum pump claimed in claim 6, it is characterized in that: between front end-plate and end plate and rotor, seal ring is installed.
8. according to rib bar vacuum pump claimed in claim 5, it is characterized in that: also comprise water-cooling jacket, water-cooling jacket is communicated with front cover, front end-plate, pump case sidewall, end plate and rear end cover successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410015456.5A CN103671109B (en) | 2014-01-14 | 2014-01-14 | A kind of rib bar vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410015456.5A CN103671109B (en) | 2014-01-14 | 2014-01-14 | A kind of rib bar vacuum pump |
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| Publication Number | Publication Date |
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| CN103671109A true CN103671109A (en) | 2014-03-26 |
| CN103671109B CN103671109B (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410015456.5A Active CN103671109B (en) | 2014-01-14 | 2014-01-14 | A kind of rib bar vacuum pump |
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| CN (1) | CN103671109B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488071A (en) * | 2018-03-06 | 2018-09-04 | 荣易 | A kind of full package thermostatically-controlled equipment for Roots vaccum pump and roots blower |
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| GB421442A (en) * | 1934-05-05 | 1934-12-20 | Gen Motors Corp | Improvements relating to rotary blowers |
| CN2189659Y (en) * | 1994-03-01 | 1995-02-15 | 孙加林 | Roots blower with new-type cooling machanism |
| JP2002349448A (en) * | 2002-05-28 | 2002-12-04 | Hisao Kitayama | Biaxial rotary pump |
| CN201246308Y (en) * | 2008-08-29 | 2009-05-27 | 广东正力精密机械有限公司 | Bearing mechanism of single screw compressor inner star wheel rotor |
| CN201428608Y (en) * | 2009-06-18 | 2010-03-24 | 宜兴优纳特机械有限公司 | Routs blower end cover integral-type cast fully-closed water jacket cooling structure |
| CN201802625U (en) * | 2010-03-31 | 2011-04-20 | 百事德机械（江苏）有限公司 | Novel sealing structure of Roots blower |
| JP2013036340A (en) * | 2011-08-03 | 2013-02-21 | Toyota Industries Corp | Screw rotor of screw pump, screw pump and supercharger using screw pump |
| CN103104489A (en) * | 2011-11-11 | 2013-05-15 | 中国科学院沈阳科学仪器研制中心有限公司 | Roots vacuum pump |
| CN103486041A (en) * | 2013-10-14 | 2014-01-01 | 山东伯仲真空设备股份有限公司 | Lobe pump rotor |
| CN203655632U (en) * | 2014-01-14 | 2014-06-18 | 淄博景曜真空设备有限公司 | Vacuum pump of edge rod |
-
2014
- 2014-01-14 CN CN201410015456.5A patent/CN103671109B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB421442A (en) * | 1934-05-05 | 1934-12-20 | Gen Motors Corp | Improvements relating to rotary blowers |
| CN2189659Y (en) * | 1994-03-01 | 1995-02-15 | 孙加林 | Roots blower with new-type cooling machanism |
| JP2002349448A (en) * | 2002-05-28 | 2002-12-04 | Hisao Kitayama | Biaxial rotary pump |
| CN201246308Y (en) * | 2008-08-29 | 2009-05-27 | 广东正力精密机械有限公司 | Bearing mechanism of single screw compressor inner star wheel rotor |
| CN201428608Y (en) * | 2009-06-18 | 2010-03-24 | 宜兴优纳特机械有限公司 | Routs blower end cover integral-type cast fully-closed water jacket cooling structure |
| CN201802625U (en) * | 2010-03-31 | 2011-04-20 | 百事德机械（江苏）有限公司 | Novel sealing structure of Roots blower |
| JP2013036340A (en) * | 2011-08-03 | 2013-02-21 | Toyota Industries Corp | Screw rotor of screw pump, screw pump and supercharger using screw pump |
| CN103104489A (en) * | 2011-11-11 | 2013-05-15 | 中国科学院沈阳科学仪器研制中心有限公司 | Roots vacuum pump |
| CN103486041A (en) * | 2013-10-14 | 2014-01-01 | 山东伯仲真空设备股份有限公司 | Lobe pump rotor |
| CN203655632U (en) * | 2014-01-14 | 2014-06-18 | 淄博景曜真空设备有限公司 | Vacuum pump of edge rod |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488071A (en) * | 2018-03-06 | 2018-09-04 | 荣易 | A kind of full package thermostatically-controlled equipment for Roots vaccum pump and roots blower |
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| CN103671109B (en) | 2015-11-18 |
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