CN217898183U - Dry vacuum pump - Google Patents
Dry vacuum pump Download PDFInfo
- Publication number
- CN217898183U CN217898183U CN202221905733.6U CN202221905733U CN217898183U CN 217898183 U CN217898183 U CN 217898183U CN 202221905733 U CN202221905733 U CN 202221905733U CN 217898183 U CN217898183 U CN 217898183U
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- tooth
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Abstract
The utility model discloses a dry vacuum pump, including first helical rotor and second helical rotor, first helical rotor has first pivot, first preceding lobe of tooth, second preceding lobe of tooth and first back lobe of tooth, and first preceding lobe of tooth has first preceding helical tooth portion and first preceding tooth's socket along first pivot spiral extension, and has second preceding helical tooth portion and second preceding tooth's socket along first pivot spiral extension with second preceding lobe of tooth, and first preceding helical tooth portion extends in first pivot with the mutual spiral of interval spiral of second preceding helical tooth portion; the second spiral rotor is provided with a second pivot, a third front tooth blade, a fourth front tooth blade and a second rear tooth blade, the third front tooth blade extends spirally along the second pivot to form a third front spiral tooth part and a third front tooth groove, the fourth front tooth blade extends spirally along the second pivot to form a fourth front spiral tooth part and a fourth front tooth groove, and the third front spiral tooth part and the fourth front spiral tooth part are mutually spaced and spirally extend on the second pivot. Improve dynamic balance, improve the rotational speed, promote the processing tolerance, make things convenient for the machine-shaping, promote the volume production efficiency.
Description
Technical Field
The utility model relates to a dry vacuum pump.
Background
The vacuum pump is mainly used for sucking and discharging gas to form a pump connected to a chamber to generate negative pressure, and various types of vacuum pumps, such as a positive displacement dry vacuum pump, mainly includes a two-shaft screw pump having a casing with a suction port and a discharge port, and the casing is rotated in a reverse direction by a pair of rotors in synchronization with each other to transfer gas from the suction port to the discharge port. The dry vacuum pump in the market at present mainly distinguishes a single-blade screw rotor and a double-blade screw rotor, and the single-blade screw rotor is a geometric configuration with eccentric mass, so that the centroid of the single-blade screw rotor is not coincident with the rotating shaft on the cross section perpendicular to the rotating shaft, so that the conditions of integral unbalance and abnormal vibration of machine body operation are easy to occur, and in order to solve the problem of balance, the use mode is to remove materials and reduce weight on the rotor rotating blades through a dynamic balancing machine, and although the method can improve dynamic balance, the air-tight effect of the relative vacuum pump can be reduced due to holes of the relative vacuum pump, and redundant working hours and construction cost are increased in manufacturing.
Therefore, how to solve the above conventional problems and deficiencies is one of the ways in which the authors of the present invention and the related manufacturers engaged in the industry desire to improve the above problems and deficiencies.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the above-mentioned not enough of current existence, the utility model provides a dry vacuum pump.
The utility model discloses a realize through following technical scheme:
a dry vacuum pump, characterized in that it comprises:
a first spiral rotor having a first pivot, a first front tooth blade, a second front tooth blade and a first rear tooth blade, the first pivot having a first air inlet front end and a first air outlet rear end, the first front tooth blade and the second front tooth blade both being disposed at the first air inlet front end position, the first front tooth blade extending along the first pivot spiral with a first front tooth portion and a first front tooth slot, the second front tooth blade extending along the first pivot spiral with a second front tooth portion and a second front tooth slot, the first front tooth portion and the second front tooth portion extending on the first pivot spirally at an interval, the first front tooth slot and the second front tooth slot extending on the first pivot spirally at an interval, the first rear tooth blade being disposed at the first air outlet rear end position, and the first rear tooth blade extending along the first pivot with a first rear tooth portion, the first rear tooth portion forming a first rear tooth portion; and
a second spiral rotor having a second pivot, a third front tooth blade, a fourth front tooth blade and a second rear tooth blade, the second pivot having a second air inlet front end and a second air outlet rear end, the third front tooth blade and the fourth front tooth blade both disposed at the second air inlet front end position, the third front tooth blade extending spirally along the second pivot with a third front tooth portion and a third front tooth slot, the fourth front tooth blade extending spirally along the second pivot with a fourth front tooth portion and a fourth front tooth slot, the third front tooth portion and the fourth front tooth portion spaced apart from each other and spirally extending on the second pivot, the third front tooth groove and the fourth front tooth groove are spirally extended on the second pivot at intervals, the first front screw tooth part is jointed with the fourth front tooth groove and the first front tooth groove to be jointed with the third front screw tooth part, the second front screw tooth part is jointed with the third front tooth groove and the second front tooth groove to be jointed with the fourth front screw tooth part, the second rear tooth blade is arranged at the second rear end position, the second rear tooth blade is spirally extended with a second rear screw tooth part along the second pivot, a second rear tooth groove is formed between the second rear screw tooth parts, and the first rear screw tooth part is jointed with the second rear tooth groove and the first rear tooth groove to be jointed with the second rear screw tooth part.
Preferably, the first front helical tooth portion and the second front helical tooth portion are spaced from each other and extend spirally along the first pivot toward the first rear end of the outlet air duct, and the third front helical tooth portion and the fourth front helical tooth portion are spaced from each other and extend spirally along the second pivot toward the second rear end of the outlet air duct.
Preferably, the end of the first front screw part and the end of the first rear screw part are connected to each other in an extending manner, and the end of the third front screw part and the end of the second rear screw part are connected to each other in an extending manner.
Preferably, a first extending space is formed between the end of the first front screw part and the end of the first rear screw part, and a second extending space is formed between the end of the third front screw part and the end of the second rear screw part.
Preferably, the first front screw part and the second front screw part have an outer diameter larger than that of the first rear screw part, and the third front screw part and the fourth front screw part have an outer diameter larger than that of the second rear screw part.
Preferably, the first front screw tooth portion and the second front screw tooth portion have an outer diameter equal to that of the first rear screw tooth portion, and the third front screw tooth portion and the fourth front screw tooth portion have an outer diameter equal to that of the second rear screw tooth portion.
Preferably, the width of the first front tooth slot and the second front tooth slot is greater than the width of the first rear tooth slot, and the width of the third front tooth slot and the fourth front tooth slot is greater than the width of the second rear tooth slot.
Preferably, the first front tooth blade and the second front tooth blade have the same tooth profile, and the third front tooth blade and the fourth front tooth blade have the same tooth profile.
Preferably, the tooth profile of the first front tooth blade is different from that of the second front tooth blade.
Preferably, the tooth profile of the third front tooth blade is different from that of the fourth front tooth blade.
The beneficial effects of the utility model reside in that:
the utility model discloses a dry vacuum pump through the configuration design of its two front vane spiral cooperation single rear vane to reach and to improve dynamic balance, can improve the rotational speed, promote the processing tolerance, make things convenient for the machine-shaping, promote the efficiency of volume production efficiency.
Drawings
Fig. 1 is a schematic perspective view of a dry vacuum pump according to an embodiment of the present invention.
Fig. 2 is a schematic side view of a dry vacuum pump according to an embodiment of the present invention.
Fig. 3 is an implementation schematic diagram of an embodiment of the present invention in which an extension space is provided between a front spiral tooth portion and a rear spiral tooth portion of a dry vacuum pump.
Fig. 4 is an implementation schematic diagram of the dry vacuum pump according to the embodiment of the present invention, in which the front spiral tooth portion and the rear spiral tooth portion have different outer diameters.
Description of the reference numerals:
dry vacuum pump 1
First intake front end 211
First rear outlet end 212
First front tooth blade 22
First front screw part 221
First front tooth slot 222
Second front tooth blade 23
Second front screw part 231
First rear tooth blade 24
First rear screw portion 241
First rear tooth slot 242
The first extension space 25
Second intake front end 311
Second outlet back end 312
Third front tooth blade 32
Third front screw tooth portion 321
Fourth front tooth blade 33
Fourth front screw part 331
Second rear lobe 34
Second rear screw portion 341
Second rear gullet 342
Detailed Description
The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings.
Hereinafter, various examples of the application of the present invention to the structure, technical content and the like of the dry vacuum pump will be described in detail with reference to the drawings attached hereto; however, the present invention is not limited to the embodiments, drawings, and detailed description.
Furthermore, those skilled in the art will also recognize that: the illustrated embodiments and accompanying drawings are provided for reference and illustration purposes only and are not intended to be limiting of the present disclosure; modifications and variations that can be easily made based on the above description are also considered to be within the scope of the present invention and are included in the claims of the present invention.
Also, the following examples refer to directional terms such as: the terms "up", "down", "left", "right", "front", "back", and the like are merely used with reference to the directions shown in the attached drawings. Accordingly, the directional terminology used is intended to be illustrative and not limiting of the present disclosure; further, in the following embodiments, the same or similar components will be denoted by the same or similar component numerals.
Please refer to fig. 1 and 2, which are a schematic perspective view and a schematic side view of a dry vacuum pump of the present invention, and it can be clearly seen from the drawings that the dry vacuum pump 1 mainly includes a first helical rotor 2 and a second helical rotor 3, wherein the first helical rotor 2 and the second helical rotor 3 are disposed in a housing having a chamber, and the chamber defines an air inlet side and an air outlet side.
The first helical rotor 2 mainly has a first pivot 21, the first pivot 21 has a first air inlet front end 211 at an end portion at an air inlet side position, and a first air outlet rear end 212 at an end portion at an air outlet side position, the first helical rotor 2 further has a first front tooth blade 22 and a second front tooth blade 23, the first front tooth blade 22 is disposed at a side position of the first air inlet front end 211, the first front tooth blade 22 has a first front helical tooth portion 221 and a first front tooth slot 222 extending spirally along the first pivot 21, the second front tooth blade 23 is disposed at another side position of the first air inlet front end 211 opposite to the first front tooth blade 22, the second front tooth blade 23 has a second front helical tooth portion 231 and a second front tooth slot 232 extending spirally along the first pivot 21, the first front helical tooth portion 221 and the second front helical tooth portion 231 are spaced from each other, the first front tooth portion 231 extends spirally along the first pivot 21, the first rear tooth portion 21 extends along the first rear helical tooth direction, and the first helical tooth portion 242 extends toward the first rear end 212 along the first pivot 21.
The second helical rotor 3 mainly has a second pivot 31, the second pivot 31 has a second air inlet front end 311 at the end of the air inlet side, and a second air outlet rear end 312 at the end of the air outlet side, the second helical rotor 3 further has a third front tooth blade 32 and a fourth front tooth blade 33, the third front tooth blade 32 is disposed at one side of the second air inlet front end 311, the third front tooth blade 32 extends a third front helical tooth portion 321 and a third front tooth slot 322 along the second pivot 31, the fourth front tooth blade 33 is disposed at the other side of the second air inlet front end 311 relative to the third front tooth blade 32, the fourth front tooth blade 33 extends a fourth front helical tooth portion 331 and a fourth front tooth slot 332 along the second pivot 31, the third front tooth portion 321 and the fourth front tooth portion 331 are spaced from each other, the second front tooth portion 341 extends along the second pivot 31, the second helical tooth portion 342 extends toward the second rear end 34, and the second helical tooth portion 342 is formed along the second rear helical tooth portion 34.
Wherein, the tooth profiles of the first front tooth blade 22 and the second front tooth blade 23 can be designed according to the compression requirement, the tooth profiles of the first front tooth blade 22 and the second front tooth blade 23 can be the same or different, and the number of spiral turns of the first front spiral tooth portion 221 of the first front tooth blade 22 and the second front spiral tooth portion 231 of the second front tooth blade 23 can be 1-2 turns, and the number of spiral turns of the first rear spiral tooth portion 241 of the first rear tooth blade 24 can be 2-6 turns, while in the present embodiment, the tooth profiles of the first front tooth blade 22 and the second front tooth blade 23 are the same, and the number of turns of the first front spiral tooth portion 221 is 2 turns and the number of turns of the second front spiral tooth portion 231 is 1 turn, in addition, the number of turns of the first rear tooth blade 24 is 4, and the end of the first front tooth portion 221 and the end of the first rear tooth portion 241 are connected in an extending manner, whereas if the number of turns of the second front tooth portion 231 is 2, the end of the second front tooth portion 231 and the end of the first rear tooth portion 241 are connected in an extending manner, in this embodiment, the outer diameter formed by the first front tooth portion 221 and the second front tooth portion 231 is equal to the outer diameter formed by the first rear tooth portion 241, and the width of the first front tooth slot 222 and the second front tooth slot 232 is greater than the width of the first rear tooth slot 242.
Furthermore, the tooth profiles of the third front tooth blade 32 and the fourth front tooth blade 33 can be designed according to the compression requirement, the tooth profiles of the third front tooth blade 32 and the fourth front tooth blade 33 can be the same or different, and the number of spiral turns of the third front tooth portion 321 of the third front tooth blade 32 and the fourth front tooth portion 331 of the fourth front tooth blade 33 can be 1-2, and the number of spiral turns of the second rear tooth portion 341 of the second rear tooth blade 34 can be 2-6, in this embodiment, the tooth profiles of the third front tooth blade 32 and the fourth front tooth blade 33 are the same, and the number of spiral turns of the third front tooth portion 321 is 2 and the number of spiral turns of the fourth front tooth portion 331 is 1, and the number of tooth slots of the second rear tooth blade 34 is 4, and the end of the third front tooth portion 321 and the end of the second rear tooth portion are connected to each other, otherwise, if the number of the fourth front tooth portion 331 is 2, the number of the tooth slots of the second rear tooth portion 34 is 4, and the end of the front tooth portion 321 and the fourth rear tooth portion are connected to each other by the front tooth portion width, and the front tooth portion 322, and the end of the fourth front tooth portion are formed by the front tooth portion and the front tooth portion 332, and the fourth front portion 322, and the rear portion are connected to each other, and the end of the front portion.
And wherein the first front screw tooth portion 221 is engaged with the fourth front tooth slot 332 and the first front tooth slot 222 is engaged with the third front screw tooth portion 321, the second front screw tooth portion 231 is engaged with the third front tooth slot 322 and the second front tooth slot 232 is engaged with the fourth front screw tooth portion 331, the first rear screw tooth portion 241 is engaged with the second rear tooth slot 342 and the first rear tooth slot 242 is engaged with the second rear screw tooth portion 341, and the screw tooth portions and the tooth slots are engaged with each other but maintain a very small relative gap therebetween, so as to be extended without contact.
The stroke of air suction, air transmission and air exhaust is started when the first helical rotor 2 and the second helical rotor 3 suck air by the sealed rotor tooth space volume through the high-speed rotation action, and the first helical rotor 2 and the second helical rotor 3 are mainly formed by a multi-stage lead rotor design that the first front tooth blade 22 and the second front tooth blade 23 of the first helical rotor 2 extend to the first rear tooth blade 24 and the third front tooth blade 32 and the fourth front tooth blade 33 of the second helical rotor 3 extend to the second rear tooth blade 34, so that the first helical rotor 2 and the second helical rotor 3 are convenient to machine and form, and the operation mode with large compression ratio and power saving is provided by utilizing that the width of the first front tooth slot 222 and the second front tooth slot 232 is larger than the width of the first rear tooth slot 242 and the width of the third front tooth slot 322 and the fourth front tooth slot 332 is larger than the width of the second rear tooth slot 342, thereby achieving the efficacy of improving dynamic balance, improving rotating speed, improving processing, facilitating machining and forming, and improving mass production efficiency.
Referring to fig. 3, in order to show an embodiment of the dry vacuum pump in which an extension space is formed between the front tooth portion and the rear tooth portion, wherein the number of spiral turns of the first front tooth portion 221 of the first front blade 22 and the second front tooth portion 231 of the second front blade 23 may be 1-2 turns, and the number of spiral turns of the first rear tooth portion 241 of the first rear blade 24 may be 2-6 turns, in the present embodiment, the number of turns of the first front tooth portion 221 is 2 turns and the number of turns of the second front tooth portion 231 is 2 turns, the number of turns of the first rear blade 24 is 3 turns, and the end of the second front tooth portion 231 and the end of the first rear tooth portion 241 are not in extension connection with each other and a first extension space 25 is formed therebetween, the number of turns of the third front tooth portion 321 is 2 turns and the end of the fourth front blade 331 is 2 turns and the second front tooth portion 331 is 2 turns, the number of turns of the first rear blade 24 is 3 turns, and the front tooth portion and the second tooth portion 23 and the rear blade portion 32 are not in extension mode, and the front blade portion and the second blade portion are not in extension mode, it is designed to have a different length, and the front blade pitch width of the front blade width and the second blade 2 and the rear blade portion 32 are not extended to be larger than the second blade 32, thereby achieving the effects of improving dynamic balance, increasing rotating speed, increasing treatment gas amount, facilitating processing and forming and improving mass production efficiency.
Referring to fig. 4, an implementation diagram of different outer diameters of the front screw tooth portion and the rear screw tooth portion of the dry vacuum pump is shown, wherein except that the outer diameters formed by the first front screw tooth portion 221 and the second front screw tooth portion 231 are equal to the outer diameter formed by the first rear screw tooth portion 241, and the outer diameters formed by the third front screw tooth portion 321 and the fourth front screw tooth portion 331 are equal to the outer diameter formed by the second rear screw tooth portion 341, in this embodiment, the outer diameters formed by the first front screw tooth portion 221 and the second front screw tooth portion 231 may also be larger than the outer diameter formed by the first rear screw tooth portion 241, and the outer diameters formed by the third front screw tooth portion 321 and the fourth front screw tooth portion 331 may also be larger than the outer diameter formed by the second rear screw tooth portion 341.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (10)
1. A dry vacuum pump, characterized in that it comprises:
a first spiral rotor having a first pivot, a first front tooth blade, a second front tooth blade and a first rear tooth blade, the first pivot having a first air inlet front end and a first air outlet rear end, the first front tooth blade and the second front tooth blade both being disposed at the first air inlet front end position, the first front tooth blade extending along the first pivot spiral with a first front tooth portion and a first front tooth slot, the second front tooth blade extending along the first pivot spiral with a second front tooth portion and a second front tooth slot, the first front tooth portion and the second front tooth portion extending on the first pivot spirally at an interval, the first front tooth slot and the second front tooth slot extending on the first pivot spirally at an interval, the first rear tooth blade being disposed at the first air outlet rear end position, and the first rear tooth blade extending along the first pivot with a first rear tooth portion, the first rear tooth portion forming a first rear tooth portion; and
a second spiral rotor having a second pivot, a third front tooth blade, a fourth front tooth blade and a second rear tooth blade, the second pivot having a second air inlet front end and a second air outlet rear end, the third front tooth blade and the fourth front tooth blade both disposed at the second air inlet front end position, the third front tooth blade extending spirally along the second pivot with a third front tooth portion and a third front tooth slot, the fourth front tooth blade extending spirally along the second pivot with a fourth front tooth portion and a fourth front tooth slot, the third front tooth portion and the fourth front tooth portion spaced apart from each other and spirally extending on the second pivot, the third front tooth groove and the fourth front tooth groove are spirally extended on the second pivot at intervals, the first front screw tooth part is jointed with the fourth front tooth groove and the first front tooth groove to be jointed with the third front screw tooth part, the second front screw tooth part is jointed with the third front tooth groove and the second front tooth groove to be jointed with the fourth front screw tooth part, the second rear tooth blade is arranged at the second rear end position, the second rear tooth blade is spirally extended with a second rear screw tooth part along the second pivot, a second rear tooth groove is formed between the second rear screw tooth parts, and the first rear screw tooth part is jointed with the second rear tooth groove and the first rear tooth groove to be jointed with the second rear screw tooth part.
2. A dry vacuum pump as claimed in claim 1,
the first front helical tooth part and the second front helical tooth part are mutually spaced and extend spirally along the first pivot toward the first air outlet rear end, and the third front helical tooth part and the fourth front helical tooth part are mutually spaced and extend spirally along the second pivot toward the second air outlet rear end.
3. A dry vacuum pump as claimed in claim 2,
the tail end of the first front screw tooth part and the tail end of the first rear screw tooth part are mutually connected in an extending mode, and the tail end of the third front screw tooth part and the tail end of the second rear screw tooth part are mutually connected in an extending mode.
4. A dry vacuum pump as claimed in claim 2,
a first extending space is formed between the tail end of the first front screw tooth part and the tail end of the first rear screw tooth part, and a second extending space is formed between the tail end of the third front screw tooth part and the tail end of the second rear screw tooth part.
5. A dry vacuum pump as claimed in claim 1,
the outer diameters of the first front screw tooth portion and the second front screw tooth portion are larger than the outer diameter of the first rear screw tooth portion, and the outer diameters of the third front screw tooth portion and the fourth front screw tooth portion are larger than the outer diameter of the second rear screw tooth portion.
6. A dry vacuum pump as claimed in claim 1,
the outer diameter of the first front screw tooth portion and the outer diameter of the second front screw tooth portion are equal to the outer diameter of the first rear screw tooth portion, and the outer diameter of the third front screw tooth portion and the outer diameter of the fourth front screw tooth portion are equal to the outer diameter of the second rear screw tooth portion.
7. A dry vacuum pump as claimed in claim 1,
the width of the first front tooth groove and the width of the second front tooth groove are larger than the width of the first rear tooth groove, and the width of the third front tooth groove and the width of the fourth front tooth groove are larger than the width of the second rear tooth groove.
8. A dry vacuum pump as claimed in claim 1,
the tooth profiles of the first front tooth blade and the second front tooth blade are the same, and the tooth profiles of the third front tooth blade and the fourth front tooth blade are the same.
9. A dry vacuum pump as claimed in claim 1,
wherein the first front tooth blade and the second front tooth blade have different tooth forms.
10. A dry vacuum pump as claimed in claim 1,
wherein the third front tooth blade and the fourth front tooth blade have different tooth shapes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221905733.6U CN217898183U (en) | 2022-07-22 | 2022-07-22 | Dry vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221905733.6U CN217898183U (en) | 2022-07-22 | 2022-07-22 | Dry vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217898183U true CN217898183U (en) | 2022-11-25 |
Family
ID=84135839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221905733.6U Active CN217898183U (en) | 2022-07-22 | 2022-07-22 | Dry vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217898183U (en) |
-
2022
- 2022-07-22 CN CN202221905733.6U patent/CN217898183U/en active Active
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