CN208184985U - A kind of screw vacuum pump - Google Patents
A kind of screw vacuum pump Download PDFInfo
- Publication number
- CN208184985U CN208184985U CN201820745797.1U CN201820745797U CN208184985U CN 208184985 U CN208184985 U CN 208184985U CN 201820745797 U CN201820745797 U CN 201820745797U CN 208184985 U CN208184985 U CN 208184985U
- Authority
- CN
- China
- Prior art keywords
- pump case
- hand thread
- thread section
- vacuum pump
- pump
- 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.)
- Expired - Fee Related
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Abstract
The utility model provides a kind of screw vacuum pump, belongs to pump manufacturing technology field.It solves the problems such as existing vacuum pump low efficiency.This screw vacuum pump, including pump case and motor, motor has motor shaft, two screw rods are provided in pump case, bearing is connected between the both ends and pump case of each screw rod, screw rod includes external transmission segment, position fixed section and left-hand thread section and right-hand thread section, connection changeover portion is formed between left-hand thread section and right-hand thread section, several spin-blocks are provided on connection changeover portion, the tail end of left-hand thread section and right-hand thread section is provided with flight, flight bending extends to be bonded on the side of spin-block and with side, gas outlet and two air inlets are provided on the lower end wall of pump case, the two sides of two air inlet difference positions and pump case, and it is connected inside pump case, gas outlet is connected with connecting at changeover portion.The utility model has the advantages that performance is stable, exhaust efficiency is high.
Description
Technical field
The utility model belongs to pump manufacturing technology field, is related to a kind of vacuum pump, in particular to a kind of screw vacuum pump.
Background technique
Vacuum pump is a kind of rotating volume-varying gas transfer pump, including screw vacuum pump, water ring pump, reciprocating pump, slide valve
The types such as pump, have the characteristics that there is biggish pumping speed in wider pressure limit, are widely used in metallurgy, chemical industry, food, electricity
The industries such as sub- plated film, screw vacuum pump spiral shell are one kind more universal in vacuum pump, using a pair of of screw rod, are made in pump case same
Walk high-speed reverse rotation and the air-breathing of generation and the air-extractor of scavenging action, two screw rods are corrected through fine dynamic balance, by bearing
Support, is mounted in pump case, has certain gap between screw rod and screw rod, therefore when pump work, between each other without friction, fortune
Turn steady, low noise, working chamber is not necessarily to lubricating oil, and therefore, screw vacuum pump can be extracted containing a large amount of water vapours and a small amount of dust
Gas occasion, ultimate vacuum is higher, consumption power it is lower, have many advantages, such as energy conservation, freedom from repairs.
The screw vacuum pump configuration of existing market is roughly the same, and twin-screw is provided in pump case, passes through the transmission of screw rod
It is vented to realize, one end of screw rod is usually provided with air inlet, gas outlet is located at the other side of screw rod, existing main scarce
Point is that exhaust efficiency is low, the disadvantage of period length.
Summary of the invention
The purpose of this utility model is to provide that a kind of performance is stable, row for the above-mentioned problems in the prior art
The high-efficient screw vacuum pump of gas.
The purpose of this utility model can be realized by the following technical scheme: a kind of screw vacuum pump, including pump case and
Motor, the motor have the motor shaft extended to inside pump case, and transverse strands are equipped with and motor phase in the pump case
Two screw rods of cooperation, are connected with bearing between the both ends and pump case of each screw rod, which is characterized in that the screw rod packet
Include external transmission segment, positioning fixed section and left-hand thread section and right-hand thread section, shape between the left-hand thread section and right-hand thread section
At there is connection changeover portion, several spin-blocks are provided on the connection changeover portion, the spin-block described in several is surrounded and connected
It crosses section circumferential direction Rotating with Uniform to be distributed, the tail end of the left-hand thread section and right-hand thread section is provided with flight, the flight
Bending extends to be bonded on the side of spin-block and with side, and gas outlet and two air inlets are provided on the lower end wall of the pump case
Mouthful, air inlet described in two distinguishes the two sides of position and pump case, and is connected inside pump case, the gas outlet and connection
It is connected at changeover portion.
The technical effect of this screw vacuum pump are as follows: in order to reduce vacuum pump each release, the spiral shell being arranged in pump case
The structure of setting connection changeover portion among thread segment is arranged using both ends for bar, air inlet there are two settings on the lower end wall of pump case,
Then vacuum pump can be carried out respectively by left-hand thread section with right-hand thread section in operation simultaneously from two inlet charges
Gas is integrated at connection changeover portion in the tail end of the two by flight by the transmitting of gas, and rotating finally by spin-block will
Gas is discharged from gas outlet.
In a kind of above-mentioned screw vacuum pump, the left-hand thread section is with right-hand thread section far from the side for connecting changeover portion
Guide-leaf plate is provided on face, the guide-leaf plate is fan-shaped.Guide-leaf plate can play guiding to the gas entered from air inlet
Effect, so that gas regular flow in a certain direction, avoids turbulent flow from generating noise, and influence exhaust efficiency.
In a kind of above-mentioned screw vacuum pump, several heat sink strips are provided on the outer surface of the pump case, described dissipates
Hot item point is uniformly distributed at equal intervals along the length direction of pump case.The radiating efficiency of vacuum pump is improved, continuous working period is extended.
In a kind of above-mentioned screw vacuum pump, the pump case and motor are connected to a fixed on the end face of one end, have
Be recessed inwardly the secure chamber to be formed, and transmission fixing piece is provided in the secure chamber, and one end of the transmission fixing piece is supported
It is against on the inner face of pump case.The transmission essence that impurity enters pump case internal influence screw rod can be effectively prevented in the design of secure chamber
Degree.
In a kind of above-mentioned screw vacuum pump, the front end of the positioning fixed section has the positioning to be formed that is recessed inwardly
It is provided with positioning pin at slot, the pump housing endophragm and locating slot opposite position, the positioning pin lateral projection can be plugged into
In locating slot.The positioning accuracy for improving screw rod helps to run more steady.
The prior art is compared, this screw vacuum pump to screw rod use double thread section form, respectively from two air inlets into
Then gas gas is discharged jointly by the spin-block being set between two thread segments, with that performance is stable, exhaust efficiency is high is excellent
Point.
Detailed description of the invention
Fig. 1 is the main view of this screw vacuum pump.
Fig. 2 is the side view of this screw vacuum pump.
Fig. 3 is the general structure schematic diagram of screw rod in this screw vacuum pump.
In figure, 1, pump case；2, motor；3, motor shaft；4, screw rod；5, bearing；6, external transmission segment；7, positioning is fixed
Section；8, left-hand thread section；9, right-hand thread section；10, changeover portion is connected；11, spin-block；12, flight；13, gas outlet；14, air inlet；
15, guide-leaf plate；16, heat sink strip；17, secure chamber；18, it is driven fixing piece；19, locating slot；20, positioning pin.
Specific embodiment
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
As shown in Figure 1 to Figure 3, this screw vacuum pump, including pump case 1 and motor 2, motor 2, which has, extends to pump
Motor shaft 3 inside shell 1, transverse strands are equipped with two screw rods 4 matched with motor 2, the both ends of each screw rod 4 in pump case 1
Bearing 5 is connected between pump case 1, screw rod 4 includes external transmission segment 6, positioning fixed section 7 and left-hand thread section 8 and right-hand thread
Section 9 is formed with connection changeover portion 10 between left-hand thread section 8 and right-hand thread section 9, connect and be provided with several spin-blocks on changeover portion 10
11, for several spin-blocks 11 around the circumferential Rotating with Uniform distribution of connection changeover portion 10, left-hand thread section 8 and the tail end of right-hand thread section 9 are equal
It is provided with flight 12, the bending of flight 12 extends to be bonded on the side of spin-block 11 and with side, is set on the lower end wall of pump case 1
It is equipped with gas outlet 13 and two air inlets 14, two air inlets 14 distinguish the two sides of position and pump case 1, and in 1 inside phase of pump case
Connection, gas outlet 13 are connected with connecting at changeover portion 10.
Left-hand thread section 8 is provided with guide-leaf plate 15, guide-leaf plate with separate connect on a side end face of changeover portion 10 of right-hand thread section 9
15 is fan-shaped, and guide-leaf plate 15 can play the role of guiding to the gas entered from air inlet 14, so that gas is in a certain direction
Regular flow avoids turbulent flow from generating noise, and influences exhaust efficiency.
In order to improve the radiating efficiency of vacuum pump, several heat sink strips 16 are provided on the outer surface of pump case 1, heat sink strip 16 divides
Along the length direction of pump case 1, it is uniformly distributed at equal intervals.
In order to effectively prevent impurity to enter the transmission accuracy of 1 internal influence screw rod 4 of pump case, pump case 1 is connected with motor 2
On the end face for connecing fixed one end, there is the secure chamber 17 to be formed that is recessed inwardly, transmission fixing piece 18 is provided in secure chamber 17, is passed
One end of dynamic fixing piece 18 is resisted against on the inner face of pump case 1.
In order to improve the positioning accuracy of screw rod 4, the front end of positioning fixed section 7 has the locating slot 19 to be formed that is recessed inwardly,
It is provided with positioning pin 20 at 1 inner wall of pump case and 19 opposite position of locating slot, 20 lateral projection of positioning pin can be plugged into locating slot
In 19.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Although pump case 1 is used more herein, motor 2, motor shaft 3, screw rod 4, bearing 5, external transmission segment 6, determines
Position fixed section 7, left-hand thread section 8, right-hand thread section 9, connection changeover portion 10, spin-block 11, flight 12, gas outlet 13, air inlet 14,
Guide-leaf plate 15, heat sink strip 16, secure chamber 17, transmission fixing piece 18, locating slot 19, the terms such as positioning pin 20, but be not precluded and make
A possibility that with other terms.The use of these terms is merely for the convenience of describing and explaining the nature of the invention；
It is contrary to the spirit of the present invention to interpret them as any one of the additional limitations.
Claims (5)
1. a kind of screw vacuum pump, including pump case (1) and motor (2), the motor (2), which has, extends to pump case (1)
Internal motor shaft (3), the pump case (1) interior transverse strands are equipped with two screw rods (4) matched with motor (2), each
Bearing (5) are connected between the both ends and pump case (1) of the screw rod (4), which is characterized in that the screw rod (4) includes external
Transmission segment (6), positioning fixed section (7) and left-hand thread section (8) and right-hand thread section (9), the left-hand thread section (8) and right-hand thread
It is formed with connection changeover portion (10) between section (9), is provided with several spin-blocks (11) on the connection changeover portion (10), it is several
A spin-block (11) is around the circumferential Rotating with Uniform distribution of connection changeover portion (10), the left-hand thread section (8) and right-hand thread section
(9) tail end is provided with flight (12), and the flight (12) bending extends on the side with spin-block (11) and and side
Side is bonded, and is provided with gas outlet (13) and two air inlets (14), air inlet described in two on the lower end wall of the pump case (1)
(14) respectively position and pump case (1) two sides, and in pump case (1) inside be connected, the gas outlet (13) with connect transition
It is connected at section (10).
2. a kind of screw vacuum pump according to claim 1, which is characterized in that the left-hand thread section (8) and right-hand thread section
(9) it is provided with guide-leaf plate (15) on the side end face far from connection changeover portion (10), the guide-leaf plate (15) is fan-shaped.
3. a kind of screw vacuum pump according to claim 1, which is characterized in that be arranged on the outer surface of the pump case (1)
Have several heat sink strips (16), the heat sink strip (16) point is uniformly distributed at equal intervals along the length direction of pump case (1).
4. a kind of screw vacuum pump according to claim 1, which is characterized in that the pump case (1) is connected with motor (2)
On the end face for connecing fixed one end, have and be recessed inwardly the secure chamber to be formed (17), is provided with transmission in the secure chamber (17)
One end of fixing piece (18), the transmission fixing piece (18) is resisted against on the inner face of pump case (1).
5. a kind of screw vacuum pump according to claim 1, which is characterized in that the front end tool of positioning fixed section (7)
Have be recessed inwardly the locating slot to be formed (19), is provided with positioning at pump case (1) inner wall and locating slot (19) opposite position
It sells (20), the positioning pin (20) lateral projection can be plugged into locating slot (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820745797.1U CN208184985U (en) | 2018-05-18 | 2018-05-18 | A kind of screw vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820745797.1U CN208184985U (en) | 2018-05-18 | 2018-05-18 | A kind of screw vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208184985U true CN208184985U (en) | 2018-12-04 |
Family
ID=64430865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820745797.1U Expired - Fee Related CN208184985U (en) | 2018-05-18 | 2018-05-18 | A kind of screw vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208184985U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973254A (en) * | 2019-01-24 | 2019-07-05 | 中氢新能技术有限公司 | Flameless combustion methanol fuel feedway |
| CN113684123A (en) * | 2021-07-26 | 2021-11-23 | 黄丹婷 | Cascade high temperature heat pump laboratory bench |
-
2018
- 2018-05-18 CN CN201820745797.1U patent/CN208184985U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973254A (en) * | 2019-01-24 | 2019-07-05 | 中氢新能技术有限公司 | Flameless combustion methanol fuel feedway |
| CN113684123A (en) * | 2021-07-26 | 2021-11-23 | 黄丹婷 | Cascade high temperature heat pump laboratory bench |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181204 Termination date: 20200518 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |