CN203892187U - Vertical Roots dry vacuum pump - Google Patents
Vertical Roots dry vacuum pump Download PDFInfo
- Publication number
- CN203892187U CN203892187U CN201420330793.9U CN201420330793U CN203892187U CN 203892187 U CN203892187 U CN 203892187U CN 201420330793 U CN201420330793 U CN 201420330793U CN 203892187 U CN203892187 U CN 203892187U
- Authority
- CN
- China
- Prior art keywords
- pump
- air
- roots
- pump chamber
- dry vacuum
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The utility model discloses a vertical Roots dry vacuum pump and belongs to the technical field of capacity-variable vacuum equipment. The vertical Roots dry vacuum pump comprises a pump shell, wherein an air inlet and an exhaust hole are formed in the pump shell. The vertical Roots dry vacuum pump is characterized in that more than two pump chambers of which the volumes are gradually reduced are sequentially formed from front to back inside the pump shell; two Roots rotors which are meshed with each other and are identical in structure are mounted in each pump chamber; air flow channels are further formed inside the pump shell; the air flow channels are positioned at the peripheries of the pump chambers and are arranged corresponding to the pump chamber one to one; the air outlets of the pump chambers are communicated with corresponding air flow channels; the air inlets of the pump chambers are communicated with air flow channels corresponding to adjacent pump chambers on the front side; an air inlet side of the pump chamber at the front end is communicated with the air inlet; an air outlet side of the pump chamber at the rear end is communicated with the exhaust hole. The vertical Roots dry vacuum pump is convenient in compressed air heat radiation and can be used for reducing the heat entering a next pump chamber, both improving the efficiency of the Roots pump in vacuuming and prolonging the service life of the rotor.
Description
Technical field
The utility model belongs to variable-capacity vacuum equipment technical field, is specifically related to a kind of vertical roots dry 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, reciprocating pump.Water ring vaccum pump, water injection vacuum pump and reciprocating pump are owing to receiving restriction in environmental pollution problem application in a lot of fields.
With continuing, researched and developed a series of dry vacuum pumps, wherein the most representative is screw vacuum pump and pawl formula vacuum pump, but the rotor structure more complicated of these two kinds of pumps is processed raising corresponding to maintenance difficulty, causes its cost high.
In order to increase the rate of air sucked in required of above-mentioned vacuum pump, people have have also researched and developed a kind of Roots pump, because it has pollution-free, advantages of simple structure and simple, obtain applying more and more widely.But Roots pump in carrying the process of gas without interior compression function, can not be by compression to gas pressurized, make the gas of relief opening smoothly discharged in atmosphere, cause single-stage Roots pump its degree of vacuum when using separately only to reach 20KPa left and right, can only be as a kind of vacuum pump of auxiliary type.If reach higher degree of vacuum, must adopt the mode of connecting with mode or the multi-stage roots vacuum pump of other vacuum pump cooperation.
The mode of multi-stage roots vacuum pump series connection has not only strengthened structure and the volume of vacuum equipment greatly, and its power consumption is the summation of many Roots pumps.So, in float tolerance fields such as medicine, electronics, substantially still adopt complex structure, expensive screw vacuum pump or pawl formula vacuum pump at present.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of dry vacuum pump simple in structure, can improve its degree of vacuum, and reduces its volume and power consumption.
For solving the problems of the technologies described above, the technical solution of the utility model is: design a kind of vertical roots dry vacuum pump, comprise pump case, on pump case, offer suction port and relief opening, it is characterized in that: from A-P, sets gradually the pump chamber that more than two volume reduces gradually in pump case, in each pump chamber, install two and be meshed and roots rotor that structure is identical;
In pump case, also offer air-flow path, air-flow path be positioned at pump chamber periphery and with pump chamber corresponding setting one by one; The air outlet of the pump chamber air-flow path corresponding with it is connected, air-flow path corresponding to suction port pump chamber adjacent with front side is connected; The air inlet side of front end pump chamber is connected with suction port, and the side of giving vent to anger of rear end pump chamber is connected with relief opening.
Preferably, on the pump case between the described pump chamber air-flow path corresponding with it, offer air cooling mouth, air cooling mouth cuts off mutually with the suction port of pump chamber.
Preferably, also offer waterway in described pump case, waterway is positioned at the outside of air-flow path.
Preferably, described roots rotor is provided with the three circumferential uniform blades around roots rotor.
Preferably, the radius of pump chamber is L, and the distance of shaft centers of two roots rotors is M;
The profile of described each blade of roots rotor is symplex structure, AB, BC, CD and tetra-sections of lines of DE, consists of:
AB section: be positioned on the axle core of roots rotor, round X1 that radius is L in the center of circle;
BC section: be the involute of basic circle X2, the center of circle of basic circle X2 is positioned on the axle core of roots rotor, radius is 0.53L～0.58 L;
CD section: be the epicycloid of circle X3 on quiet round X4, moving circle X3 be the center of circle in the axle center of another roots rotor, the circle that radius is L; Quiet round X4 is concentric with circle X1, radius is M-L;
DE section: on quiet round X4.
Preferably, described roots rotor is arranged on pump shaft, and pump shaft is vertically arranged in pump case.
Preferably, described suction port is positioned at the top of pump case, and relief opening is positioned at the bottom of pump case.
Compared with prior art, the beneficial effects of the utility model are:
1, owing to setting gradually from A-P the pump chamber that more than two volume reduces gradually in pump case, in each pump chamber, installing two is meshed and roots rotor that structure is identical, multi-stage rotor is incorporated in a pump case, gas is compressed step by step in each pump chamber, both improve the degree of vacuum of Roots pump, reduced again volume and the power consumption of many Roots pump cascades; Simultaneously, air-flow path be positioned at pump chamber periphery and with pump chamber corresponding setting one by one, make the gas flow that prime pump chamber is discharged just can enter next stage pump chamber after the close air-flow path of pump case outer wall, be convenient to compressed gas heat radiation, reduce the heat that enters next pump chamber, both improve the efficiency that Roots pump vacuumizes, extended again the working life of rotor.
2, owing to offering air cooling mouth on the pump case between the pump chamber air-flow path corresponding with it, can make to obtain a cooling gas part and return to pump chamber in air-flow path, reduce the temperature of gas in pump chamber, be beneficial to the excess Temperature that prevents rotor.
3, owing to also offering waterway in pump case, waterway is positioned at the outside of air-flow path, can make medium and pump chamber in waterway carry out heat exchange by radiation, takes away the heat of pump chamber, makes its cooling, is beneficial to the working efficiency that maintains Roots pump.
4, because roots rotor adopts three blade structures, do not affecting under the prerequisite of the sealing between rotor and pump case, improved the volumetric efficiency of Roots pump.
5, owing to adopting the molded lines of rotor of specified structure, improve on the one hand the engagement degree of two rotors, increased its area of contact, reduced the reflux rate of gas; Adopted on the other hand involute, the skinny width of blade, has further increased to volumetric efficiency more than 51%.
6, because pump shaft is vertically arranged in pump case, adopt vertical structure, make the liquid in pump chamber can automatically flow into subordinate's pump chamber, thus the discharge of noresidue rapidly.
7, the utility model 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 utility model;
Fig. 2 is axial arrangement schematic diagram of the present utility model;
Fig. 3 rotor molded line schematic diagram.
Mark in figure: 1, pump case; 2, suction port; 3, air-flow path; 4, waterway; 5, air cooling mouth; 6, roots rotor; 7, motor; 8, pump chamber; 9, relief opening; 10, pump shaft.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
It is benchmark that the utility model be take the flow direction of gas in pump, by along pump shaft 10 axially near one end of suction port 2, be defined as front end, correspondingly the one end near relief opening 9 is defined as to rear end.
As shown in Figure 1, the driving shaft and the driven shaft that in the interior installation of pump case 1, are parallel to each other, driving shaft and driven shaft form pump shaft 10 of the present utility model, pump shaft 10 is vertically arranged in pump case 1, the front end of pump case 1 is offered suction port 2, relief opening 9 is offered in rear end, that is to say, suction port 2 is positioned at the top of pump case 1, and relief opening 9 is positioned at the bottom of pump case 1.At interior 8, four pump chambers 8 of four pump chambers that arrange of pump case 1, from A-P, be volume and reduce gradually shape along the axially-aligned of pump shaft 10, four groups of roots rotors that are meshed 6 are installed on pump shaft 10, in each pump chamber 8, have one group; Multi-stage rotor is incorporated in a pump case 1, and gas is compressed step by step in each pump chamber 8, has both improved the degree of vacuum of Roots pump, has reduced again volume and the power consumption of many Roots pump cascades.In pump case 1, also offer air-flow path 3, air-flow path 3, along the circumferential setting of pump case 1, is positioned at the periphery of pump chamber 8 and arranges one to one with pump chamber 8; The air outlet of pump chamber 8 air-flow path 3 corresponding with it is connected, air-flow path 3 corresponding to suction port 2 pump chamber 8 adjacent with front side is connected; Make the gas flow that prime pump chamber 8 is discharged just can enter next stage pump chamber 8 after the close air-flow path 3 of pump case 1 outer wall, be convenient to compressed gas heat radiation, reduce the heat that enters next pump chamber 8, both improved the efficiency that Roots pump vacuumizes, extended again the working life of rotor.The pump chamber 8 air inlet sides of front end are connected with suction port 2, and the pump chamber 8 of the rear end side of giving vent to anger is connected with relief opening 9.
In order to reduce the temperature in pump chamber 8, prevent that temperature of rotor is too high, on the pump case 1 of 3 of each pump chamber 8 air-flow paths corresponding with it, offer air cooling mouth 5, air cooling mouth 5 cuts off mutually with the suction port 2 of pump chamber 8.Make air cooling mouth 5 with the specific practice that the suction port 2 of pump chamber 8 cuts off mutually be: form angle β with the axle center of place axle at 2 that in roots rotor 6, two adjacent interlobate concave arc two ends contact with pump case 1 at first, pump case 1 two ends between suction port 2 and air cooling mouth 5 form angle α, α > β.So can make to obtain a cooling gas part and return to pump chamber 8 in air-flow path 3, reduce the temperature of gas in pump chamber 8, be beneficial to the excess Temperature that prevents rotor.Also in pump case 1, offered waterway 4, waterway 4 is positioned at the outside of air-flow path 3, can make medium and pump chamber 8 in waterway 4 carry out heat exchange by radiation, takes away the heat of pump chamber 8, makes its cooling, is beneficial to the working efficiency that maintains Roots pump.
In order to improve the area of contact of 1 of roots rotor 6 and pump case, improve volumetric efficiency, roots rotor 6 is provided with along its circumferential three uniform blades that shape is identical, and roots rotor 6 adopts three blade structures.The profile of roots rotor 6 each blade is symplex structure, consists of: wherein, AB section is circular arc AB, BC, CD and tetra-sections of lines of DE, in the center of circle, is positioned on the axle core of roots rotor 6, round X1 that radius is L; BC section is involute, and the center of circle of its basic circle X2 is positioned on the axle core of roots rotor 6, radius is 0.53L～0.58 L; CD section is the epicycloid of circle X3 on quiet round X4, moving circle X3 be the center of circle in the axle center of another roots rotor, the circle that radius is L; Quiet round X4 is concentric with circle X1, radius is M-L; DE section is circular arc, on quiet round X4.Above-mentioned L used is the radius of pump chamber 8, and M is two distances of shaft centers between roots rotor.
The structure of two roots rotors is identical.The molded line of this kind of structure has improved the engagement degree of two rotors on the one hand, increases its area of contact, reduces the reflux rate of gas; Adopted on the other hand involute, the skinny width of blade, has further increased to volumetric efficiency more than 51%.
Working procedure of the present utility model is as follows:
Open motor 7, motor 7 drives pump shaft 10 work, pump shaft 10 drives the roots rotor 6 in each pump chamber 8 together to rotate, and intermeshing rotation, gas is inhaled into from the suction port 2 of pump case 1 pump chamber 8 being positioned at foremost, the flow direction of gas in pump case 1 is as in Figure 1 and Figure 2 shown in arrow, under the engagement in rotation of roots rotor 6, the gas sucking is extruded to the outlet side of pump chamber 8, from both sides, enter the air-flow path 3 that is positioned at pump chamber 8 peripheries, extend air flow path on the one hand, be beneficial to the heat of compression that discharges gas; On the other hand, due to the outer wall of air-flow path 3 near pump case 1, gas is convenient to outside distribute heat in mobile process in air-flow path 3.Air-flow flows after half cycle around air-flow path 3, from the tail end of air-flow path 3 at the corresponding levels, is inhaled into next stage pump chamber 8, compressed again.So gas is compressed step by step, under the effect of pressure reduction, and the discharge of final pump chamber 8 relief openings 9 from rear-most end.
Air-flow also can return to pump chamber 8 from air cooling mouth 5 by some gas in mobile process in air-flow path 3, reduces the temperature in pump chamber 8, can maintain the operating temperature of pump chamber 8 along with the prolongation of Roots pump operating time, then keeps the higher efficiency that vacuumizes.
The above, it is only preferred embodiment of the present utility model, be not the utility model to be done to the restriction of other form, 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 solutions of the utility model content that do not depart from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present utility model, still belong to the protection domain of technical solutions of the utility model.
Claims (7)
1. a vertical roots dry vacuum pump, comprise pump case, on pump case, offer suction port and relief opening, it is characterized in that: from A-P, sets gradually the pump chamber that more than two volume reduces gradually in pump case, in each pump chamber, install two and be meshed and roots rotor that structure is identical;
In pump case, also offer air-flow path, air-flow path be positioned at pump chamber periphery and with pump chamber corresponding setting one by one; The air outlet of the pump chamber air-flow path corresponding with it is connected, air-flow path corresponding to suction port pump chamber adjacent with front side is connected; The air inlet side of front end pump chamber is connected with suction port, and the side of giving vent to anger of rear end pump chamber is connected with relief opening.
2. according to vertical roots dry vacuum pump claimed in claim 1, it is characterized in that: on the pump case between the described pump chamber air-flow path corresponding with it, offer air cooling mouth, air cooling mouth cuts off mutually with the suction port of pump chamber.
3. according to vertical roots dry vacuum pump claimed in claim 2, it is characterized in that: in described pump case, also offer waterway, waterway is positioned at the outside of air-flow path.
4. according to the arbitrary described vertical roots dry vacuum pump of claims 1 to 3, it is characterized in that: described roots rotor is provided with the three circumferential uniform blades around roots rotor.
5. according to vertical roots dry vacuum pump claimed in claim 4, it is characterized in that: the radius of pump chamber is L, the distance of shaft centers of two roots rotors is M;
The profile of described each blade of roots rotor is symplex structure, AB, BC, CD and tetra-sections of lines of DE, consists of:
AB section: be positioned on the axle core of roots rotor, round X1 that radius is L in the center of circle;
BC section: be the involute of basic circle X2, the center of circle of basic circle X2 is positioned on the axle core of roots rotor, radius is 0.53L～0.58 L;
CD section: be the epicycloid of circle X3 on quiet round X4, moving circle X3 be the center of circle in the axle center of another roots rotor, the circle that radius is L; Quiet round X4 is concentric with circle X1, radius is M-L;
DE section: on quiet round X4.
6. according to vertical roots dry vacuum pump claimed in claim 5, it is characterized in that: described roots rotor is arranged on pump shaft, and pump shaft is vertically arranged in pump case.
7. according to vertical roots dry vacuum pump claimed in claim 6, it is characterized in that: described suction port is positioned at the top of pump case, relief opening is positioned at the bottom of pump case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420330793.9U CN203892187U (en) | 2014-06-20 | 2014-06-20 | Vertical Roots dry vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420330793.9U CN203892187U (en) | 2014-06-20 | 2014-06-20 | Vertical Roots dry vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203892187U true CN203892187U (en) | 2014-10-22 |
Family
ID=51718600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420330793.9U Withdrawn - After Issue CN203892187U (en) | 2014-06-20 | 2014-06-20 | Vertical Roots dry vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203892187U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005954A (en) * | 2014-06-20 | 2014-08-27 | 淄博景曜真空设备有限公司 | Vertical type Roots dry vacuum pump |
| CN113803255A (en) * | 2021-10-29 | 2021-12-17 | 上海樊容工业技术中心 | Pump cavity structure and pump body structure of doublestage roots pump |
| EP4417787A1 (en) * | 2023-02-09 | 2024-08-21 | Ebara Corporation | Roots type vacuum pump |
-
2014
- 2014-06-20 CN CN201420330793.9U patent/CN203892187U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005954A (en) * | 2014-06-20 | 2014-08-27 | 淄博景曜真空设备有限公司 | Vertical type Roots dry vacuum pump |
| CN113803255A (en) * | 2021-10-29 | 2021-12-17 | 上海樊容工业技术中心 | Pump cavity structure and pump body structure of doublestage roots pump |
| EP4417787A1 (en) * | 2023-02-09 | 2024-08-21 | Ebara Corporation | Roots type vacuum pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104005954B (en) | A kind of vertical roots dry vacuum pump | |
| CN103104491A (en) | Roots and claw-type rotor combined multi-stage dry vacuum pump | |
| CN203892187U (en) | Vertical Roots dry vacuum pump | |
| CN202326246U (en) | Roots and claw-type rotor combined multi-stage dry vacuum pump | |
| CN103486034B (en) | Multi-stage roots pump | |
| CN2667203Y (en) | Multi-stage Roots oil-free vacuum pump | |
| CN203488368U (en) | Two-stage three-blade air-cooled roots vacuum pump | |
| CN202628518U (en) | Multi-group type vacuum pump gas suction device | |
| CN105626480B (en) | The vacuum system of grease device | |
| CN207500153U (en) | A kind of vacuum pump | |
| CN212079675U (en) | Air inlet and exhaust mechanism of reciprocating vertical oilless vacuum pump | |
| CN209761720U (en) | large-displacement volume rotary compressor | |
| CN204877924U (en) | Spline internal tooth positive displacement water delivery pump | |
| CN203081752U (en) | Two-stage Roots pump of dual overflow valves | |
| CN202946385U (en) | Spiral slice energy-efficient and environment-friendly vacuum pump | |
| CN203560099U (en) | Multistage roots pump | |
| CN107762896B (en) | Vacuum pump | |
| CN216199042U (en) | Portable single-stage double-suction pump | |
| CN201193615Y (en) | Double-channel stator for double-acting rotor pump | |
| CN201546978U (en) | Two-stage high-flow gaseous ring pump | |
| CN210686304U (en) | Double-end symmetrical uniform-pitch screw vacuum pump | |
| CN101265912B (en) | Double-acting rotor pump double flow stator | |
| CN101303019B (en) | Fan type air pump | |
| CN202914315U (en) | Double-stage roots vacuum pump | |
| CN116241461B (en) | Multistage Roots vacuum pump and working method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141022 Effective date of abandoning: 20160615 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |