CN206246361U - A kind of Twin-screw vacuum pump - Google Patents
A kind of Twin-screw vacuum pump Download PDFInfo
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- CN206246361U CN206246361U CN201621311089.4U CN201621311089U CN206246361U CN 206246361 U CN206246361 U CN 206246361U CN 201621311089 U CN201621311089 U CN 201621311089U CN 206246361 U CN206246361 U CN 206246361U
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Abstract
The utility model provides a kind of Twin-screw vacuum pump, belongs to vacuum pump technology field.It is not compact that it solves existing Twin-screw vacuum pump structure, the technical problem such as reduction of power transmitting accuracy and transmission efficiency.This Twin-screw vacuum pump includes the pump housing, it is rotatably connected on two screw rods on the pump housing, pressure balance cover and gear cover are fixed with the pump housing successively, screw rod passes one section of the pump housing for linkage section, linkage section passes through the endoporus of pressure balance cover and stretches into gear cover, the Oil sealing assembly that the endoporus of pressure balance cover can be blocked is provided between the linkage section and pressure balance cover of screw rod, the endoporus of pressure balance cover is near one end of the pump housing and pump housing inner space, venting channels are provided with pressure balance cover, the external port of venting channels is located on the outer peripheral face of pressure balance cover, the inner port of venting channels is connected and positioned at Oil sealing assembly near the side of the pump housing with endoporus.The utility model has the advantages that to improve screw rod power transmitting accuracy and transmission efficiency.
Description
Technical field
The utility model belongs to vacuum pump technology field, is related to a kind of Twin-screw vacuum pump.
Background technology
Twin-screw vacuum pump is to make air-breathing and the row that synchronous high-speed is reversely rotated and produced in the pump housing using two screw rods
The air-extractor of gas effect, it is the renewal product of oil sealing vacuum pump, can extract and contain a large amount of water vapours and a small amount of powder
The gas occasion of dirt, major pharmacy and chemical enterprise are used widely at home.
Screw rod includes linkage section, and two screw rods operationally connect to ensure synchronization by the gear being fixed on linkage section
High-speed reverse rotates, and gear needs lubricating oil to be lubricated in transmission.Dry screw vacuum pump disclosed in Chinese patent literature
【Authorization Notice No. CN2758530Y】, the gear of linkage section is located in gear cavity on two screw rods in the patent, is leaned on linkage section
The seal that can prevent oil vapour from entering in the pump housing is provided with the nearly pump housing.The pump housing can be caused when being run due to screw rod near gear cavity
The air pressure of side is relatively low, therefore setting seal prevents the oil vapour in gear cavity to be inhaled into the pump housing, and in order to set
Seal, it is necessary to so that the installation to meet seal more long of the length of linkage section, while seal meeting after long-time is rotated
Abrasion increased maintenance cost, it is necessary to change；Meanwhile, the rotating shaft of motor is not to be directly protruding into gear cavity and be connected in the patent
Section is directly connected to, but is attached by interlude, the set-up mode be in order to avoid when sealing part abrasion is not changed,
Because gear cavity is connected with the pump housing, the fluctuation of air pressure in gear cavity can be caused, stirring for air pressure may be so that fluid be seeped into electricity
Cause the damage of motor in machine, therefore interlude must be increased to avoid fluid from being seeped into motor, and directly led using which
The connecting length increase between machine and linkage section is sent a telegraph, causes structure not compact, the reduction of power transmitting accuracy and transmission efficiency.
The content of the invention
The purpose of this utility model is directed to existing technology and there is above mentioned problem, it is proposed that a kind of Twin-screw vacuum pump,
The technical problem that the utility model is solved is to ensure to reduce maintenance cost in the case that lubricating oil will not enter in the pump housing.
The purpose of this utility model can be realized by following technical proposal：
A kind of Twin-screw vacuum pump, including the pump housing, two screw rods being rotatably connected on the pump housing, it is solid successively on the pump housing
Surely there are pressure balance cover and a gear cover, the screw rod pass the pump housing one section is linkage section, and the linkage section passes through pressure balance
The endoporus of cover is simultaneously stretched into gear cover, it is characterised in that being provided between the linkage section and pressure balance cover of the screw rod will press
The Oil sealing assembly of the endoporus blocking of dynamic balance cover, the endoporus of the pressure balance cover connects near one end of the pump housing and pump housing inner chamber
It is logical, venting channels are provided with the pressure balance cover, the external port of the venting channels is located on the outer peripheral face of pressure balance cover,
The inner port of the venting channels is connected and positioned at Oil sealing assembly near the side of the pump housing with endoporus.
There is lubricating oil, can block lubricating oil by Oil sealing assembly flows through pressure balance cover into the pump housing in gear cover；
When Twin-screw vacuum pump runs, because the air pressure in the pump housing at pressure balance cover is relatively low, therefore pressure balance cover
Interior gas can be flowed in the pump housing, and extraneous air is input in pressure balance cover by venting channels so that pressure balance cover
Interior air pressure keeps normal pressure, and lubricating cup is connected with gear cover so that also keep normal pressure, pressure balance cover and gear cover in gear cover
Between do not exist draught head, therefore be avoided that lubricating oil penetrates Oil sealing assembly because of draught head, enter so as to avoid lubricating oil
Enter in the pump housing；The venting channels and Oil sealing assembly connected with the pump housing by setting are reached and avoid the lubricating oil in gear cover from entering
Purpose in the pump housing, without setting airtight construction between the pump housing and gear cover so that structure is simpler, while in the absence of abrasion
Expendable part, therefore decrease the cost of maintenance；Due to air seal structure need not be set, the connection segment length between the pump housing and gear cover
Degree is relatively short, power syndeton length is shortened, so as to improve power transmitting accuracy and transmission efficiency so that whole machine operation is more
It is steady reliable.
In above-mentioned Twin-screw vacuum pump, one end relative with pressure balance cover is fixed with bushing on the pump housing, institute
Linkage section through bushing is stated, the linkage section to be passed through and be cased with sealing axle sleeve, the outer peripheral face of the sealing axle sleeve on a section of bushing
On be provided with helical spiral groove, one end of the spiral groove connects with venting channels, the spiral groove it is another
End with pump housing inner space, the sealing axle sleeve with screw rod is rotated when the spiral groove can be by the gas band of venting channels
Enter in the pump housing.Gas actively can be drawn into the pump housing by sealing axle sleeve by the external world by spiral groove by venting channels when rotated
It is interior, it is to avoid the influence of fluctuations of air pressure further avoids fluid from being penetrated into the pump housing by Oil sealing assembly in endoporus in the pump housing
May, so that ensure that operationally lubricating oil will not enter in the pump housing Twin-screw vacuum pump, while sealing axle sleeve is also in the absence of mill
The situation of damage, it is not necessary to change and safeguard, reduce maintenance cost.
In above-mentioned Twin-screw vacuum pump, the Oil sealing assembly includes bearing block, middle axle sleeve and axle envelope one, the axle
Bearing is fixed in the endoporus of pressure balance cover and bearing seat sets in endoporus on the inside of one end of gear cover, the bearing block
There is a bearing, the linkage section passes through bearing, the middle axle sleeve is arranged and is fixed on linkage section and middle axle sleeve is located at Bearing support
One end of the nearly pump housing, the axle envelope one is arranged between bearing block and middle axle sleeve.By axle envelope one and bearing block and centre
The cooperation of axle sleeve can block lubricating oil and flow through endoporus, so as to avoid lubricating oil from entering in the pump housing；Axle envelope one can be stainless using dry type
Steel shaft is sealed, long service life, it is not necessary to is often changed and is safeguarded, reduces maintenance cost.
Used as another situation, in above-mentioned Twin-screw vacuum pump, the Oil sealing assembly includes bearing block, middle axle sleeve
With some rubber seal, the bearing block is fixed in the endoporus of pressure balance cover and bearing seat is close to gear cover in endoporus
One end, bearing block inner side is provided with bearing, and linkage section passes through bearing, the middle axle sleeve to be arranged and be fixed on linkage section and middle
Axle sleeve is located at bearing near one end of the pump housing, and some rubber seal are arranged and are fixed on jackshaft and put side by side, Ruo Gansuo
The lateral surface for stating rubber seal reclines sealing with bearing block.By some sealings for realizing lubricating oil, multiple rubber seal
Service life can be improved, multiple rubber seal will be simultaneously changed in full maintenance, maintain easily maintenance.
It is located in above-mentioned Twin-screw vacuum pump, on the linkage section between jackshaft set and bearing and is additionally provided with oil baffle
One.Oil baffle one is avoided that lubricating oil is penetrated into the pump housing along the surface of linkage section, and blocking lubricating oil is by connecting section surface
Into the path of the pump housing, realization avoids the purpose that lubricating oil enters in the pump housing；Oil baffle one with screw rod rotate, oil baffle one with
The inner ring of bearing is against the equal geo-stationary of inner ring of oil baffle one, middle axle sleeve and bearing, in the absence of the situation of abrasion, is not required to
Maintenance is changed, maintenance cost is reduced.
In above-mentioned Twin-screw vacuum pump, one end and the centre axle sleeve against the sealing axle sleeve of the sealing axle sleeve
The recessed shoulder of resigning is provided with against the inner peripheral surface of one end with middle axle sleeve, the sealing being enclosed within linkage section is provided with the recessed shoulder of resigning
Circle, the middle axle sleeve has raised butting section with sealing axle sleeve against one end, and the butting section is stretched into the recessed shoulder of resigning simultaneously
With sealing ring against.Sealing ring is avoided that the gap between close encapsulation axle sleeve and linkage section, it is to avoid gas from sealing axle sleeve and
Enter the pump housing or the outflow pump housing between linkage section, so as to the fluctuation for being further ensured that air pressure in the pump housing is not interfered with endoporus
Air pressure so that the air pressure in endoporus remains normal pressure, further avoids fluid from being penetrated into the pump housing by Oil sealing assembly
May, so as to ensure that operationally lubricating oil will not enter in the pump housing Twin-screw vacuum pump；Sealing ring, sealing axle sleeve and jackshaft
Set geo-stationary, in the absence of the situation of abrasion, it is not necessary to change and safeguard, reduce maintenance cost.
In above-mentioned Twin-screw vacuum pump, the pressure balance cover and bearing block, middle axle sleeve, axle envelope one and bushing
Between form pressure balance chamber, the spiral groove is connected with pressure balance chamber, and the inner port of the venting channels is put down with pressure
The connection of weighing apparatus chamber.Pressure balance chamber increase gas circulation space so that gas from venting channels flow to spiral groove when it is more suitable
Freely, so as to ensure that can be drawn into gas in the pump housing all the time when rotated by sealing axle sleeve, it is to avoid the fluctuation shadow of air pressure in the pump housing
Ring in endoporus, it is ensured that operationally lubricating oil will not enter in the pump housing Twin-screw vacuum pump.
In above-mentioned Twin-screw vacuum pump, Twin-screw vacuum pump also includes motor, and the motor is fixed on gear cover
And the rotating shaft of motor is stretched into gear cover and is connected with the linkage section of a wherein screw rod, the linkage section is stretched on a section of gear cover
Gear is fixed with, the gear engagement on two linkage sections of screw rod is fixed with shaft coupling, the shaft coupling in the rotating shaft of the motor
Device is fixed by attachment bolt with the gear on wherein one screw rod linkage section.The rotating shaft of motor is directly protruding into gear cover with
A piece linkage section connection for screw rod, further shorten power syndeton length, be passed so as to improve power between motor and screw rod
Precision and transmission efficiency are passed so that the operation of whole machine is more steady reliable, while so that more compact structure between motor and the pump housing, drop
Low Twin-screw vacuum pump overall volume；Air pressure in gear cover in the presence of venting channels remains normal pressure without being subject to
The influence of air pressure fluctuation in the pump housing, therefore be not in the situation that lubricating oil is penetrated into motor, it is ensured that the normal fortune of motor
OK.
In above-mentioned Twin-screw vacuum pump, disc, the gear cover and pressure balance are fixed with the shaft coupling
Cover and oil through is provided with fixed side wall, the oil through is inclined hole, the oil through is towards bearing.Disc runs in rotating shaft
When can cause in gear cover lubricating oil splash, the lubricating oil of splashing can be to gear lubrication, while also having lubricating oil entrance
Oil through is lubricated to bearing, it is ensured that the normal rotation of screw rod.
In above-mentioned Twin-screw vacuum pump, the perforation that the rotating shaft of power supply machine is passed through, the electricity are provided with the gear cover
Oil baffle two is arranged with the rotating shaft of machine, lateral surface and the hole wall of perforation of the oil baffle two recline.Oil baffle two is avoided that
Enter in motor between the lubricating oil of splashing, it is ensured that the normal operation of motor.
In above-mentioned Twin-screw vacuum pump, axle envelope two is also arranged with the rotating shaft of the motor, the axle envelope two is located at
Between the rotating shaft of motor and the housing of motor.Axle envelope two is avoided that lubricating oil penetrates into motor internal, is further ensured that motor
Sealing.
Compared with prior art, this Twin-screw vacuum pump will not enter in the pump housing with guarantee lubricating oil, and reduction is safeguarded into
This so that vavuum pump is more compact, improves screw rod power transmitting accuracy and transmission efficiency so that whole machine operation is more steady reliable
Advantage.
Brief description of the drawings
Fig. 1 is longitudinal cross section structure diagram of this Twin-screw vacuum pump.
Fig. 2 is the mplifying structure schematic diagram in A portions in Fig. 1.
Fig. 3 is the horizontal cross section structure diagram of this Twin-screw vacuum pump.
Fig. 4 is the mplifying structure schematic diagram in B portions in Fig. 3.
In figure, 1, the pump housing；11st, bushing；2nd, pressure balance cover；21st, endoporus；22nd, venting channels；23rd, pressure balance chamber；3、
Gear cover；31st, oil through；32nd, perforate；33；Lubricating cup；4th, screw rod；41st, linkage section；42nd, gear；5th, sealing axle sleeve；51st, spiral
Groove；52nd, the recessed shoulder of resigning；53rd, sealing ring；6th, bearing block；61st, middle axle sleeve；611st, butting section；62nd, axle envelope one；63rd, bearing；
64th, oil baffle one；7th, motor；71st, shaft coupling；72nd, attachment bolt；73rd, oil baffle two；74th, axle envelope two；75th, disc.
Specific embodiment
The following is specific embodiment of the utility model and with reference to accompanying drawing, further is made to the technical solution of the utility model
Description, but the utility model is not limited to these embodiments.
Embodiment one
As shown in figures 1 and 3, Twin-screw vacuum pump includes the pump housing 1, motor 7, two spiral shells being rotatably connected on the pump housing 1
Bar 4, being fixed with successively on the pump housing 1 has lubricating oil in pressure balance cover 2 and gear cover 3, gear cover 3, screw rod 4 passes the pump housing 1
One section be linkage section 41, linkage section 41 through pressure balance cover 2 endoporus 21 and stretch into gear cover 3, linkage section 41 is stretched into
Gear 42 is fixed with a section of gear cover 3, the gear 42 on two linkage sections of screw rod 4 41 is engaged, it is solid in the rotating shaft of motor 7
Shaft coupling 71 is connected with, shaft coupling 71 is fixed by attachment bolt 72 with the gear 42 on wherein one linkage section 41 of screw rod 4, motor
7 are fixed on gear cover 3 and the rotating shaft of motor 7 is stretched into gear cover 3 and is connected with wherein one linkage section of screw rod 4 41.
As shown in Figures 1 to 4, the endoporus 21 of pressure balance cover 2 is near one end of the pump housing 1 and the inner space of the pump housing 1, screw rod
The Oil sealing assembly that endoporus 21 can be blocked is provided between 4 linkage section 41 and pressure balance cover 2, is provided with pressure balance cover 2 logical
Gas passage 22, the external port of venting channels 22 is located on the outer peripheral face of pressure balance cover 2, the inner port and endoporus of venting channels 22
21 connect and positioned at Oil sealing assembly near the side of the pump housing 1.
As shown in Figure 2 and Figure 4, specifically, one end relative with pressure balance cover 2 on the pump housing 1 is fixed with bushing 11, even
Section 41 through bushing 11 is connect, linkage section 41 to be passed through and be cased with sealing axle sleeve 5 on a section of bushing 11, on the outer peripheral face of sealing axle sleeve 5
Helical spiral groove 51 is provided with, one end of spiral groove 51 connects with venting channels 22, the other end of spiral groove 51
With the inner space of the pump housing 1, sealing axle sleeve 5 with screw rod 4 is rotated when spiral groove 51 gas of venting channels 22 can be brought into
In the pump housing 1.
As shown in Figures 1 to 4, Oil sealing assembly includes bearing block 6, middle axle sleeve 61 and axle envelope 1, and bearing block 6 is fixed on
The endoporus 21 of pressure balance cover 2 is interior and bearing block 6 is located at endoporus 21 near one end of gear cover 3, and the inner side of bearing block 6 is provided with bearing
63, linkage section 41 passes through bearing 63, and middle axle sleeve 61 is arranged and is fixed on linkage section 41 and middle axle sleeve 61 is leaned on positioned at bearing 63
One end of the nearly pump housing 1, axle envelope 1 is arranged between bearing block 6 and middle axle sleeve 61, and jackshaft set 61 is located on linkage section 41
Oil baffle 1 is additionally provided with and bearing 63 between.
As shown in Figures 1 to 4, one end of sealing axle sleeve 5 and middle axle sleeve 61 are against, sealing axle sleeve 5 and middle axle sleeve 61
Inner peripheral surface against one end is provided with the recessed shoulder 52 of resigning, and the sealing ring 53 being enclosed within linkage section 41 is provided with recessed shoulder 52 of stepping down, middle
Axle sleeve 61 and sealing axle sleeve 5 have a raised butting section 611 against one end, butting section 611 stretch into the recessed shoulder 52 of resigning and with it is close
Seal 53 is against sealing ring 53 is avoided that the gap between close encapsulation axle sleeve 5 and linkage section 41.Pressure balance cover 2 and bearing
Seat 6, middle axle sleeve 61, formation pressure balance chamber 23 between axle envelope 1 and bushing 11, spiral groove 51 and pressure balance chamber
23 connections, the inner port of venting channels 22 is connected with pressure balance chamber 23.
As shown in figure 1, being fixed with disc 75 on shaft coupling 71, opened on the side wall that gear cover 3 is fixed with pressure balance cover 2
There is an oil through 31, oil through 31 is inclined hole, oil through 31 is towards bearing 63.It is provided with what the rotating shaft of power supply machine 7 was passed through on gear cover 3
Perforation 32, is arranged with oil baffle 2 73 in the rotating shaft of motor 7, lateral surface and the hole wall of perforation 32 of oil baffle 2 73 recline.Electricity
Axle envelope 2 74 is also arranged with the rotating shaft of machine 7, axle envelope 2 74 is located between rotating shaft and the housing of motor 7 of motor 7.
When Twin-screw vacuum pump runs, because the air pressure in the pump housing 1 at pressure balance cover 2 is relatively low, therefore
Gas in pressure balance cover 2 can be flowed in the pump housing 1, and extraneous air is input in pressure balance cover 2 by venting channels 22,
So that the air pressure in pressure balance cover 2 keeps normal pressure, lubricating cup 33 is connected with gear cover 3 so that also keep normal in gear cover 3
Pressure, does not exist draught head, therefore be avoided that lubricating oil penetrates oil sealing because of draught head between pressure balance cover 2 and gear cover 3
Component, enters in the pump housing 1 so as to avoid lubricating oil.
Embodiment two
The present embodiment is essentially identical with the structure and principle of embodiment one, and different place is：Oil sealing assembly includes
Bearing block, middle axle sleeve and two rubber seal, bearing block is fixed in the endoporus of pressure balance cover and bearing seat is in interior
Near one end of gear cover, bearing block inner side is provided with bearing in hole, and linkage section passes through bearing, middle axle sleeve to be arranged and be fixed on linkage section
Upper and middle axle sleeve is located at bearing near one end of the pump housing, and two rubber seal are arranged and are fixed on jackshaft and put side by side, and two
The lateral surface of individual rubber seal and bearing block recline sealing.
Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute
Category those skilled in the art can make various modifications or supplement or using similar to described specific embodiment
Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.
Claims (10)
1. a kind of Twin-screw vacuum pump, including the pump housing (1), two screw rods (4) being rotatably connected on the pump housing (1), the pump housing
(1) pressure balance cover (2) and gear cover (3) are fixed with successively, the screw rod (4) pass the pump housing (1) one section is linkage section
(41), the linkage section (41) through pressure balance cover (2) endoporus (21) and stretch into gear cover (3), it is characterised in that institute
State and be provided with what the endoporus (21) of pressure balance cover (2) can be blocked between the linkage section (41) of screw rod (4) and pressure balance cover (2)
Oil sealing assembly, the endoporus (21) of the pressure balance cover (2) is near one end of the pump housing (1) and the pump housing (1) inner space, the pressure
Venting channels (22) are provided with dynamic balance cover (2), the external port of the venting channels (22) is located at the periphery of pressure balance cover (2)
On face, the inner port of the venting channels (22) is connected and positioned at Oil sealing assembly near the side of the pump housing (1) with endoporus (21).
2. Twin-screw vacuum pump according to claim 1, it is characterised in that with pressure balance cover (2) on the pump housing (1)
Relative one end is fixed with bushing (11), and through bushing (11), the linkage section (41) is through bushing for the linkage section (41)
(11) sealing axle sleeve (5) is cased with one section, helical spiral groove is provided with the outer peripheral face of the sealing axle sleeve (5)
(51), one end of the spiral groove (51) connects with venting channels (22), the other end and the pump housing of the spiral groove (51)
(1) inner space, the sealing axle sleeve (5) with screw rod (4) is rotated when the spiral groove (51) can be by venting channels
(22) gas is brought into the pump housing (1).
3. Twin-screw vacuum pump according to claim 2, it is characterised in that the Oil sealing assembly include bearing block (6), in
Between axle sleeve (61) and axle envelope one (62), the bearing block (6) is fixed in the endoporus (21) of pressure balance cover (2) and bearing block
(6) positioned at endoporus (21) near one end of gear cover (3), bearing block (6) inner side is provided with bearing (63), the linkage section
(41) through bearing (63), the middle axle sleeve (61) is arranged and is fixed on linkage section (41) and middle axle sleeve (61) is positioned at bearing
(63) near one end of the pump housing (1), the axle envelope one (62) is arranged between bearing block (6) and middle axle sleeve (61).
4. Twin-screw vacuum pump according to claim 3, it is characterised in that jackshaft set is located on the linkage section (41)
(61) oil baffle one (64) is additionally provided with and bearing (63) between.
5. the Twin-screw vacuum pump according to claim 3 or 4, it is characterised in that one end of the sealing axle sleeve (5) is with
Between axle sleeve (61) be provided with the recessed shoulder (52) of resigning against the inner peripheral surface of one end with middle axle sleeve (61) against, the sealing axle sleeve (5),
The sealing ring (53) being enclosed within linkage section (41), the middle axle sleeve (61) and sealing axle sleeve are provided with the recessed shoulder (52) of stepping down
(5) there is raised butting section (611) against one end, the butting section (611) is stretched into the recessed shoulder (52) of resigning and and sealing ring
(53) against.
6. the Twin-screw vacuum pump according to claim 3 or 4, it is characterised in that the pressure balance cover (2) and bearing block
(6), middle axle sleeve (61), formation pressure balance chamber (23), the spiral groove between axle envelope one (62) and bushing (11)
(51) connected with pressure balance chamber (23), the inner port of the venting channels (22) is connected with pressure balance chamber (23).
7. Twin-screw vacuum pump as claimed in any of claims 1 to 4, it is characterised in that Twin-screw vacuum pump is also
Including motor (7), the motor (7) is fixed on gear cover (3) and gear cover (3) and wherein is stretched into the rotating shaft of motor (7)
Linkage section (41) connection of root screw rod (4), the linkage section (41) is stretched into and gear (42) is fixed with a section of gear cover (3),
Gear (42) engagement on two linkage sections (41) of screw rod (4), shaft coupling (71) is fixed with the rotating shaft of the motor (7),
The shaft coupling (71) is fixed by the gear (42) on attachment bolt (72) and wherein one screw rod (4) linkage section (41).
8. Twin-screw vacuum pump according to claim 7, it is characterised in that be fixed with disc on the shaft coupling (71)
(75) oil through (31), is provided with the gear cover (3) the side wall fixed with pressure balance cover (2), the oil through (31) is
Inclined hole, the oil through (31) is towards bearing (63).
9. Twin-screw vacuum pump according to claim 7, it is characterised in that be provided with power supply machine (7) on the gear cover (3)
The perforation (32) that passes through of rotating shaft, oil baffle two (73) is arranged with the rotating shaft of the motor (7), the oil baffle two (73)
Lateral surface reclines with the hole wall of perforation (32).
10. Twin-screw vacuum pump according to claim 7, it is characterised in that be also arranged with the rotating shaft of the motor (7)
Axle envelope two (74), the axle envelope two (74) is between the rotating shaft of motor (7) and the housing of motor (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621311089.4U CN206246361U (en) | 2016-12-01 | 2016-12-01 | A kind of Twin-screw vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621311089.4U CN206246361U (en) | 2016-12-01 | 2016-12-01 | A kind of Twin-screw vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206246361U true CN206246361U (en) | 2017-06-13 |
Family
ID=59004378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621311089.4U Active CN206246361U (en) | 2016-12-01 | 2016-12-01 | A kind of Twin-screw vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206246361U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106382223A (en) * | 2016-12-01 | 2017-02-08 | 浙江创为真空设备有限公司 | Double screw vacuum pump |
| WO2021119879A1 (en) * | 2019-12-15 | 2021-06-24 | 江苏亚太工业泵科技发展有限公司 | Screw vacuum pump having internal nitrogen gas seal provided at gas discharge side |
| CN114367227B (en) * | 2021-12-31 | 2022-12-30 | 河南博欣生物科技有限公司 | Vacuum homogenizing emulsifying mixer |
-
2016
- 2016-12-01 CN CN201621311089.4U patent/CN206246361U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106382223A (en) * | 2016-12-01 | 2017-02-08 | 浙江创为真空设备有限公司 | Double screw vacuum pump |
| WO2021119879A1 (en) * | 2019-12-15 | 2021-06-24 | 江苏亚太工业泵科技发展有限公司 | Screw vacuum pump having internal nitrogen gas seal provided at gas discharge side |
| CN114367227B (en) * | 2021-12-31 | 2022-12-30 | 河南博欣生物科技有限公司 | Vacuum homogenizing emulsifying mixer |
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