CN103982428A - Double-section helical lead vacuum pump - Google Patents
Double-section helical lead vacuum pump Download PDFInfo
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- CN103982428A CN103982428A CN201310049386.0A CN201310049386A CN103982428A CN 103982428 A CN103982428 A CN 103982428A CN 201310049386 A CN201310049386 A CN 201310049386A CN 103982428 A CN103982428 A CN 103982428A
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- section
- low pressure
- high pressure
- rotor assembly
- pressure section
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Abstract
The invention relates to a double-section helical lead vacuum pump including a casing, a gas inlet end, a gas discharge end, a rotor assembly, a low pressure end plate, a plurality of low pressure section bearings, a plurality of high pressure section bearings, a pair of synchronous gears, and a motor; the casing is designed with a low pressure section and a high pressure section, and is provided with a low pressure section containing space and a high-pressure section containing space; the gas inlet end is formed in the low pressure section; and the gas discharge end is formed in the high pressure section; the rotor assembly is provided with a large lead section and a small lead section which are respectively arranged in the low pressure section containing space and the high-pressure section containing space; the low pressure end plate is connected to the low pressure section of the casing; the plurality of low pressure section bearings are arranged in the low-pressure end plate, and are used for supporting and fixing the rotor assembly; the plurality of high pressure section bearings are arranged in the high pressure section of the casing, and are used for supporting and fixing the rotor assembly; the pair of synchronous gears are connected with the rotor assembly from the low pressure section and drives the rotor assembly to run; and the motor is connected with the rotor assembly from the high pressure section and drives the rotor assembly to run. The vacuum pump casing is integrally formed without additional assembly and adjustment, and the replacement or repair of the rotor assembly is convenient.
Description
Technical field
The invention relates to a kind of vacuum pump, particularly about a kind of two section of one lead of screw vacuum pumps that can ease of assembly.
Background technique
Vacuum pump is applied to manufacturing the environment of vacuum, its mode of action is in a suction port, air to be inputted, and utilize inner helical rotor the low-pressure gas of this suction port to be compressed to the relief opening of high voltage terminal, to produce the state of vacuum, therefore quality and the rotor of vacuum manufacturing effect have close relationship, therefore rotor is also called as the heart of vacuum pump, except affecting the usefulness of vacuum pump, also can affect its working life and cost.
Generally in the middle of prior art, vacuum pump is quite high in the cost of power cost, its reason tie up in, according to gas load equation F=AP, if in the roughly equal situation of the pressure of exhaust end, the sectional area of rotor compression is identical again, the spent mechanical energy of rotor remains constant, therefore can cause the cost of power cost or the energy, so, if if rotor diameter maintains in identical situation with pitch, this situation is just difficult for solving, and for head it off, just there is the rotor design of two sections of helical pitches, utilize the sectional area that reduces rotor back segment, reduce gas load, further lower the consumption of mechanical energy and the waste of the energy, but the shortcoming of this kind of design is, the rotor of two kinds of different leads must be arranged in two kinds of different casings, assemble again, when assembling, more to proofread and correct, not only in assembling, must spend many manpowers and time cost thus, change or keep in repair rotor and also can cause suitable inconvenience.
In view of this, the inventor is according to the experience accumulation of research for many years, and arrange in pairs or groups the intention of self and constantly attempt under, and then develop a kind of two section lead of screw vacuum pumps that can effectively improve defect mentioned in above-mentioned prior art.
Summary of the invention
Main purpose of the present invention, be to provide a kind of two section lead of screw vacuum pump, by utilizing bearing that rotor assembly is fixed on low pressure end plate, and casing is designed to integrally formed, just can avoid thus casing being designed to two sections in prior art, the facts that must additionally assemble and proofread and correct, in addition, because bearing is fixed on rotor assembly on low pressure end plate, therefore user is as long as pull down low pressure end plate, just can directly rotor assembly be extracted out, to facilitate replacing or the maintenance of rotor assembly.
The two section of one of the present invention lead of screw vacuum pump, it comprises: a casing, is divided on it and has a low pressure stage and a high pressure section, and have: a low pressure stage containing space and high pressure section containing space, be formed at respectively in this low pressure stage and a high pressure section; One inlet end, is formed on low pressure stage and is communicated in low pressure stage containing space; And an exhaust end, be formed on high pressure section and be communicated in high pressure section containing space; One rotor assembly, cording has a large helical pitch section and a little helical pitch section, and this large helical pitch section and this little helical pitch section system are arranged at respectively in this low pressure stage containing space and this high voltage terminal containing space, external diameter and pitch by large helical pitch section are greater than little helical pitch section, produce the effect of compression can make this rotor assembly running time; One low pressure end plate, is connected in the low pressure stage of casing; Multiple low pressure stage bearings, are arranged in this low pressure end plate, in order to support and fixed rotor assembly, as long as mobile low pressure end plate just can related movable rotor assembly; Multiple high pressure section bearings, are arranged at the high pressure section in casing, in order to support and fixed rotor assembly; A pair of synchromesh gear, connects and the running of rotor driven assembly from low pressure stage; And a motor, be connected in rotor assembly from high pressure section, and drive it to rotate.
The invention has the advantages that, by utilizing bearing that rotor assembly is fixed on low pressure end plate, and casing is designed to integrally formed, just can avoid thus casing being designed to two sections in prior art, the facts that must additionally assemble and proofread and correct, in addition, because bearing is fixed on rotor assembly on low pressure end plate, therefore user, as long as low pressure end plate is pulled down, just can directly extract rotor assembly out, to facilitate replacing or the maintenance of rotor assembly.
Brief description of the drawings
Fig. 1 is one first preferred embodiment structural representation of a kind of two section lead of screw vacuum pumps of the present invention;
Fig. 2 is this first preferred embodiment action schematic diagram of two section lead of screw vacuum pumps of the present invention;
Fig. 3 is one second preferred embodiment structural representation of two section lead of screw vacuum pumps of the present invention;
Fig. 4 is one the 3rd preferred embodiment structural representation of two section lead of screw vacuum pumps of the present invention; And
Fig. 5 is one the 4th preferred embodiment structural representation of two section lead of screw vacuum pumps of the present invention.
1: casing
11: low pressure stage
111: low pressure stage containing space
112: inlet end
12: high pressure section
121: high pressure section containing space
122: exhaust end
2: rotor assembly
21: large helical pitch section
22: little helical pitch section
31: low pressure end plate
41: low pressure stage bearing
42: high pressure section bearing
51: synchromesh gear
61: motor
7: vacuum generator
71: excess pressure valve device
8: water jacket
Embodiment
In order more clearly to describe the two section of one proposed by the invention lead of screw vacuum pumps, below will coordinate graphicly, elaborate preferred embodiment of the present invention.
Please refer to Fig. 1, it is the first preferred embodiment structural representation of a kind of two section lead of screw vacuum pumps of the present invention, comprise: a casing 1, on it, there is the design of a low pressure stage 11 and a high pressure section 12, and have: a low pressure stage containing space 111 and high pressure section containing space 121, be formed at respectively in this low pressure stage 11 and a high pressure section 12, and the bore of this low pressure stage containing space 111 is greater than this high pressure section containing space 121; One inlet end 112, be formed on low pressure stage 11 and UNICOM in low pressure stage containing space 111; And an exhaust end 122, be formed on high pressure section 12 and be communicated in high pressure section containing space 121; One rotor assembly 2, there is a large helical pitch section 21 and a little helical pitch section 22, and this large helical pitch section 21 is arranged at respectively in this low pressure stage containing space 111 and this high voltage terminal containing space 121 with this little helical pitch section 22, external diameter and pitch by large helical pitch section 21 are greater than little helical pitch section 22, can make this rotor assembly 2 turn round time, produce the effect of compression, wherein, the radius of large helical pitch section 21 is greater than this little helical pitch section 22, in addition, have more a power rotor and a driven rotor; One low pressure end plate 31, is connected in the low pressure stage 11 of casing 1; Multiple low pressure stage bearings 41, are arranged in this low pressure end plate 31, in order to support and fixed rotor assembly 2, as long as mobile low voltage terminal version 31 just can related movable rotor assembly 2; Multiple high pressure section bearings 42, are arranged at the high pressure section 12 in casing 1, and in order to support and fixed rotor assembly 2, wherein, high pressure section 12 more can be provided with a high pressure end plate, and has therein a bearing support and carry the plurality of high pressure section bearing 42; A pair of synchromesh gear 51, connects also rotor driven assembly 2 from low pressure stage 11 and turns round; And a motor 61, be connected in rotor assembly 2 from high pressure section 12, and drive it to rotate.
As mentioned above, the element of this first preferred embodiment connects to close and has done a detailed description, the substitute mode of rotor assembly 2 will be further illustrated below, please continue to refer to Fig. 2, this the first preferred embodiment action schematic diagram of two section lead of screw vacuum pumps of the present invention, as shown in the figure, due to this low pressure end plate 31, be connected in the low pressure stage 11 of casing 1; And support and fixed rotor assembly 2 by the multiple low pressure stage bearings 41 that are arranged at wherein, therefore when user wants to replace or maintenance rotor assembly 2, as long as execute pulling force from low voltage terminal version 31, or utilize hanging tool to sling, just can be directly related to rotor assembly 2 pull-ups, thus, just can avoid needing in prior art dismantling individually time that big or small helical pitch rotor and casing produce and the cost of human cost;
Refer to Fig. 3, one second preferred embodiment structural representation of two section lead of screw vacuum pumps of the present invention, wherein the place different from this first embodiment is, have more at least one vacuum generator 7 at exhaust end 122, to assist exhaust decompression, and between this vacuum generator 7 and this pair of section lead of screw vacuum pump, have more at least one excess pressure valve device 71, the function of overvoltage exhaust during as high capacity, wherein, this excess pressure valve device 71 can be combined with a muffler and an exhaust check valve, to reduce noise and the backflow because of gas, and then affect vacuum produce effect.
Please continue to refer to Fig. 4, one the 3rd preferred embodiment structural representation of two section lead of screw vacuum pumps of the present invention, wherein the place different from this first embodiment is, be coated at least one water jackets 8 with the action of lowering the temperature in high pressure section 12 peripheries, increase the radiating effect of casing, avoid rotor assembly 2 to cause wearing and tearing interference to damage because crossing thermal expansion.
Finally refer to Fig. 5, one the 4th preferred embodiment structural representation of two section lead of screw vacuum pumps of the present invention, wherein the place different from this first embodiment is, more can be provided with a high pressure end plate at high pressure section 12 ends, and there is therein a bearing support (not shown) and carry the plurality of high pressure section bearing 42.
But above-mentioned detailed description illustrates for possible embodiments of the present invention, this embodiment is not in order to limit the scope of the invention, and all equivalences that does not depart from skill spirit of the present invention are implemented or change, and all should be contained in protection scope of the present invention.
Claims (9)
1. two section lead of screw vacuum pumps, is characterized in that it comprises:
One casing, is divided on it and has a low pressure stage and a high pressure section, and have:
One low pressure stage containing space and high pressure section containing space, be formed at respectively in this low pressure stage and a high pressure section;
One inlet end, is formed on low pressure stage and is communicated in low pressure stage containing space; And
One exhaust end, is formed on high pressure section and is communicated in high pressure section containing space;
One rotor assembly, cording has a large helical pitch section and a little helical pitch section, and this large helical pitch section and this little helical pitch section system are arranged at respectively in this low pressure stage containing space and this high voltage terminal containing space, external diameter and pitch by large helical pitch section are greater than little helical pitch section, produce the effect of compression can make this rotor assembly running time;
One low pressure end plate, is connected in the low pressure stage of casing;
Multiple low pressure stage bearings, are arranged in this low pressure end plate, in order to support and fixed rotor assembly, as long as mobile low pressure end plate just can related movable rotor assembly;
Multiple high pressure section bearings, are arranged at the high pressure section in casing, in order to support and fixed rotor assembly;
A pair of synchromesh gear, connects and the running of rotor driven assembly from low pressure stage; And
One motor, is connected in rotor assembly from high pressure section, and drives it to rotate.
2. two section lead of screw vacuum pump according to claim 1, is characterized in that, the bore of described low pressure stage containing space is greater than this high pressure section containing space.
3. two section lead of screw vacuum pump according to claim 1, is characterized in that, the radius of described large helical pitch section is greater than this little helical pitch section.
4. two section lead of screw vacuum pumps according to claim 1, is characterized in that, described high pressure section periphery can be coated the water jacket action of lower the temperature, the heat dissipation potential of increase casing.
5. two section lead of screw vacuum pump according to claim 1, is characterized in that, described high pressure section more can be provided with a high pressure end plate, and has therein a bearing support.
6. two section lead of screw vacuum pump according to claim 1, it is characterized in that, also there is at least one excess pressure valve device, be installed on this casing, and on casing, be provided with overvoltage outlet and be connected with this venting gas appliance, this overvoltage exports the width of a tooth that is less than or equal to rotor of the width on the longitudinal direction of rotor.
7. two section lead of screw vacuum pump according to claim 6, is characterized in that, described excess pressure valve device can be combined with a muffler and an exhaust check valve.
8. two section lead of screw vacuum pump according to claim 1, is characterized in that also having at least one vacuum generator, is arranged in this exhaust end, to assist exhaust decompression.
9. two section lead of screw vacuum pump according to claim 1, is characterized in that, described rotor assembly also has a power rotor and a driven rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310049386.0A CN103982428A (en) | 2013-02-07 | 2013-02-07 | Double-section helical lead vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310049386.0A CN103982428A (en) | 2013-02-07 | 2013-02-07 | Double-section helical lead vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103982428A true CN103982428A (en) | 2014-08-13 |
Family
ID=51274539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310049386.0A Pending CN103982428A (en) | 2013-02-07 | 2013-02-07 | Double-section helical lead vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103982428A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6336086A (en) * | 1986-07-30 | 1988-02-16 | Taiko Kikai Kogyo Kk | Multi-stage screw type vacuum pump |
| JPH01237384A (en) * | 1988-03-18 | 1989-09-21 | Hitachi Ltd | Vacuum pump device |
| RU1820035C (en) * | 1991-01-22 | 1993-06-07 | Научно-производственное объединение "Вакууммаш" | Two-rotor screw oilless vacuum pump |
| US20030152475A1 (en) * | 2000-07-25 | 2003-08-14 | Becher Ulrich F. | Twin screw rotors and displacement machines containing the same |
| CN201368025Y (en) * | 2009-03-16 | 2009-12-23 | 台州市星光真空设备制造有限公司 | Improved structure of screw stem vacuum pump |
| CN202266431U (en) * | 2011-08-30 | 2012-06-06 | 汉钟精机股份有限公司 | Rotor of vacuum pump |
-
2013
- 2013-02-07 CN CN201310049386.0A patent/CN103982428A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6336086A (en) * | 1986-07-30 | 1988-02-16 | Taiko Kikai Kogyo Kk | Multi-stage screw type vacuum pump |
| JPH01237384A (en) * | 1988-03-18 | 1989-09-21 | Hitachi Ltd | Vacuum pump device |
| RU1820035C (en) * | 1991-01-22 | 1993-06-07 | Научно-производственное объединение "Вакууммаш" | Two-rotor screw oilless vacuum pump |
| US20030152475A1 (en) * | 2000-07-25 | 2003-08-14 | Becher Ulrich F. | Twin screw rotors and displacement machines containing the same |
| CN201368025Y (en) * | 2009-03-16 | 2009-12-23 | 台州市星光真空设备制造有限公司 | Improved structure of screw stem vacuum pump |
| CN202266431U (en) * | 2011-08-30 | 2012-06-06 | 汉钟精机股份有限公司 | Rotor of vacuum pump |
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Application publication date: 20140813 |
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| RJ01 | Rejection of invention patent application after publication |