CN107023485A - Sliding vane rotary vacuum pump - Google Patents
Sliding vane rotary vacuum pump Download PDFInfo
- Publication number
- CN107023485A CN107023485A CN201710242311.2A CN201710242311A CN107023485A CN 107023485 A CN107023485 A CN 107023485A CN 201710242311 A CN201710242311 A CN 201710242311A CN 107023485 A CN107023485 A CN 107023485A
- Authority
- CN
- China
- Prior art keywords
- fuel tank
- radiating tube
- rotary vacuum
- sliding vane
- vacuum 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
Abstract
The present invention relates to a kind of sliding vane rotary vacuum pump, including fuel tank (1), motor (2), oil pump (3), radiating tube (4) and fan blade (5), the pump housing (10) and pump oil (6) are provided with the fuel tank (1), the left side outer wall of the fuel tank (1) is provided with electric machine support (7), the motor (2) is arranged on electric machine support (7), radiating tube (4) is connected on the left side outer wall of the fuel tank (1) where electric machine support (7), the oil pump (3) is located in fuel tank (1) inner chamber, output shaft one end of the motor (2) passes through with fuel tank (1) and is connected with oil pump (3), radiating tube (4) two-port both passes through fuel tank (1) and is connected and communicates with the oil inlet and oil-out of oil pump (3) respectively, the fan blade (5) is connected on motor (2) output shaft between motor (2) and radiating tube (4).It is an advantage of the invention that：Good heat dissipation effect, maintenance cost is low.
Description
Technical field
The present invention relates to a kind of pump, specifically a kind of sliding vane rotary vacuum pump.
Background technology
Sliding vane rotary vacuum pump prejudicially installs a rotor in the pump housing, and rotor outer circle and pump housing inner surface are tangent, rotor slot
Built with two blades with spring, during rotation, the inwall for making blade top and the pump housing by centrifugal force and tension force of spring is kept
Contact, rotor rotation drives blade to be slided along pump housing inwall, gas through air intake enter intracavitary through air-breathing, compress and be vented
Journey, the oil reservoir eventually passed through in fuel tank is drained into air.Because gas through above-mentioned evacuation process is that can produce heat, blade and pump
Also produce heat during the friction of internal wall, if therefore the not good type of cooling, fuel tank and pump body temperature can be caused drastically
Rise, influences the service life of pump, blade stuck phenomenon can be produced when serious.The rotary-vane vaccum pump of big pumping speed in the market
Cooling water channel would generally be set on fuel tank, in the sliding vane rotary vacuum pump course of work into cooling water channel lead to cooling water, but this
Sample not only increases the manufacture difficulty of fuel tank mould, and from the pump housing, (temperature around the pump housing is most farther out due to cooling water channel
It is high), hence in so that the radiating effect of whole sliding vane rotary vacuum pump is poor；In addition when cooling water channel goes wrong, such as casing rupture, cold
But water route leakage, broken wall etc., it is necessary to change that fuel tank is overall, maintenance cost is higher.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of good heat dissipation effect, the low sliding vane rotary vacuum pump of maintenance cost.
In order to solve the above technical problems, the invention provides a kind of sliding vane rotary vacuum pump of following structure：Including fuel tank, fuel tank
It is interior to be provided with the pump housing and pump oil, wherein, in addition to motor, oil pump, outer radiating tube and fan blade, the left side outer wall of fuel tank is provided with electricity
Machine support, motor is arranged on electric machine support, and outer radiating tube is connected on the left side outer wall of the fuel tank where electric machine support, oil pump
In fuel tank inner chamber, output shaft one end of motor is passed through with fuel tank and is connected with oil pump transmission, and outer radiating tube two-port is worn
Cross fuel tank and be connected respectively with the oil inlet and oil-out of oil pump and communicated, fan blade is connected to the motor between motor and outer radiating tube
On output shaft.
After said structure, compared with prior art, the present invention has advantages below：Sliding vane rotary vacuum pump of the present invention passes through
Motor drives oil pump, and the pump oil in fuel tank is transported in the outer radiating tube outside fuel tank by oil pump, and fan blade is in motor output shaft
Drive under air is rapidly flowed toward outer radiating tube, so as to reach the purpose that the pump oil in outer radiating tube cools down, and cold
But the pump oil after can be turned again in fuel tank by outer radiating tube.From the foregoing, it will be observed that first, sliding vane rotary vacuum pump of the present invention is by outer radiating
Pipe with fuel tank is separate comes, so not only substantially reduce the manufacture difficulty of fuel tank mould, and when fuel tank is damaged,
Fuel tank only need to be changed, it is not necessary to change outer radiating tube, therefore reduce the maintenance cost of sliding vane rotary vacuum pump of the present invention；The
Two, the pump oil around the temperature highest pump housing can be output in the outer radiating tube outside fuel tank by sliding vane rotary vacuum pump of the present invention,
And directly cooled down by the pump oil in the air-cooled external radiating tube of mode, therefore substantially increase sliding vane rotary vacuum pump of the present invention
Radiating effect；3rd, sliding vane rotary vacuum pump of the present invention is relieved could be cold to sliding vane rotary vacuum pump progress it is necessary to have cooling water source
But limitation, therefore greatly facilitate the use of user.
Sliding vane rotary vacuum pump of the present invention, wherein, a plurality of horizontal convex tendon is equipped with the forward and backward outer wall of fuel tank.
The setting of horizontal convex tendon can greatly increase the area of dissipation of fuel tank, so that when fan blade rotates the high-speed air to be formed
Where rapidly flowing toward horizontal convex tendon during fuel tank outer wall, more heats can just be taken away, and then further increase rotation of the present invention
The radiating effect of piece vavuum pump.
Sliding vane rotary vacuum pump of the present invention, wherein, shrouding, shrouding connection are equipped with the outside of the forward and backward outer wall of fuel tank
On horizontal convex tendon, shrouding left part is connected on electric machine support, makes the tubular of electric machine support and shrouding one both ends open of formation
Structure, outer radiating tube is located in the tubular structure.
Set shrouding purpose be to be oriented to rotate the high-speed air to be formed to fan blade, enable air to along by
Flowed through in multiple tubular conduits that fuel tank outer wall, shrouding and horizontal convex tendon are surrounded, so as to more heats be taken away, Jin Erjin
One step improves the radiating effect of sliding vane rotary vacuum pump of the present invention；Meanwhile, it is true that the setting of shrouding also greatly increases blade of the present invention
The area of dissipation of empty pump, so as to effectively increase the radiating effect of sliding vane rotary vacuum pump of the present invention.
Sliding vane rotary vacuum pump of the present invention, wherein, fan blade is located in tubular structure.
Fan blade is located in tubular structure, can thus fan blade is drawn air into greatest extent in tubular structure
And high-speed air is formed, so that the radiating effect of sliding vane rotary vacuum pump of the present invention is further enhanced.
Sliding vane rotary vacuum pump of the present invention, wherein, the outer spiral domain of radiating tube is on the outside of motor output shaft.
The outer spiral domain of radiating tube is on the outside of motor output shaft, so that fan blade rotates the high-speed air to be formed can
Front flows to outer radiating tube at high speed, so that the radiating effect of sliding vane rotary vacuum pump of the present invention is further enhanced.
Sliding vane rotary vacuum pump of the present invention, wherein, outer radiating tube is finned radiating tube.
Sliding vane rotary vacuum pump of the present invention, wherein, the oil on the left of bearing, bearing is provided between fuel tank and motor output shaft
Box outer wall is provided with closure.
Sliding vane rotary vacuum pump of the present invention, wherein, fuel tank is provided with air inlet and exhaust outlet, and the pump housing is provided with air admission hole
And venthole, connected between air inlet and air admission hole by air inlet pipe, be provided with and communicated with external water source in the fuel tank outside the pump housing
Interior radiating tube, interior radiating tube bottom is immersed in pump oil, and one is connected with the pump housing can be by being extracted for being come out from venthole
Gas guides the exhaust screen inside radiating tube.
Sliding vane rotary vacuum pump of the present invention adds water-cooling structure again on the basis of air-cooled, so that blade vacuum of the present invention
Pump can have a variety of types of cooling, i.e., singly use air cooling way, such a mode can make in the environment of cooling water source is lacked
Sliding vane rotary vacuum pump of the present invention is used, or singly uses water-cooling pattern, such a mode can prevent that space is smaller, air circulation is inconvenient
In the environment of use sliding vane rotary vacuum pump of the present invention, or air cooling way and water-cooling pattern use simultaneously, and such a mode can be in this hair
Bright sliding vane rotary vacuum pump needs to use in the case of quick heat radiating.From the foregoing, it will be observed that the increase of water-cooling structure is not only able to greatly enhance
The radiating effect of sliding vane rotary vacuum pump of the present invention, but also substantially increase the scope of application of sliding vane rotary vacuum pump of the present invention.In addition,
The water-cooling structure of sliding vane rotary vacuum pump of the present invention has advantages below：First, sliding vane rotary vacuum pump of the present invention is by interior radiating tube and fuel tank
It is separate to come, the manufacture difficulty of fuel tank mould is so not only substantially reduced, and when fuel tank is impaired, also only need to change
Fuel tank, it is not necessary to radiating tube in changing, therefore reduce the maintenance cost of sliding vane rotary vacuum pump of the present invention；Second, due to this
Invention sliding vane rotary vacuum pump comes interior radiating tube and fuel tank are separate, thus interior radiating tube can be arranged on into temperature highest
The pump housing around fuel tank in so that cooling water can take away the amount of heat around the pump housing, and then effectively increase
The radiating effect of sliding vane rotary vacuum pump of the present invention；3rd, because interior radiating tube only bottom is immersed in pump oil, one is connected with the pump housing
The gas that is extracted come out from venthole can be guided to the exhaust screen at radiating tube, the High Temperature Gas so extracted out by the pump housing
Body just directly can be contacted directly with the interior radiating tube top exposed outside pump oil, so as to will directly be extracted entrained by gas
Amount of heat take away, and then effectively increase the radiating effect of sliding vane rotary vacuum pump of the present invention.
Sliding vane rotary vacuum pump of the present invention, wherein, exhaust screen is located above venthole, and exhaust screen one end is connected to
On the pump housing, the exhaust screen other end is provided with a bending part obliquely, and interior radiating tube is located at below bending part.
Exhaust screen is although simple in construction, but can guide the gas that is extracted come out from venthole to radiating tube
Place, so that the radiating effect of sliding vane rotary vacuum pump of the present invention is improved, and greatly reduces the system of sliding vane rotary vacuum pump of the present invention
Cause this.
Sliding vane rotary vacuum pump of the present invention, wherein, it is provided with inlet cylinder at air inlet, the import of air inlet pipe and inlet cylinder
Side wall is communicated, and the inlet cylinder lower end below air inlet pipe import forms dislodger.
The impurity entrained by gas that the setting of dislodger will can enter from air inlet is stayed in dislodger, so that effectively
The impurity entered in the pump housing is reduced, and then the abrasion between blade and pump housing inwall can be reduced, is so not only reduced
The maintenance cost of sliding vane rotary vacuum pump of the present invention, and can also effectively reduce blade and heat produced during wall friction in the pump housing.
Sliding vane rotary vacuum pump of the present invention, wherein, inlet cylinder be connected with the side wall at the air inlet pipe import place of communicating into
Air filter net, inlet cylinder communicates the annular slot of the side wall provided with upper end open at place with air inlet pipe import, and air inlet screen is arranged at
In annular slot.
The setting of screen pack further effectively reduces the impurity entered in the pump housing, thus further reduce blade with
Abrasion between pump housing inwall, so not only reduces the maintenance cost of sliding vane rotary vacuum pump of the present invention, and can also effectively reduce
Blade and heat produced during wall friction in the pump housing；The fixed structure of other air inlet screen is also very simple, is easy in the future more
Change air inlet screen.
Brief description of the drawings
Fig. 1 is the broken section structural representation of sliding vane rotary vacuum pump of the present invention；
Fig. 2 is the cross section structure diagram of the line A-A along along Fig. 1；
Fig. 3 is the sectional structure enlarged diagram of the line B-B along along Fig. 1.
Embodiment
Sliding vane rotary vacuum pump of the present invention is described in further detail with reference to the accompanying drawings and detailed description.
As shown in Figure 1, Figure 2 and Figure 3, sliding vane rotary vacuum pump of the present invention include fuel tank 1, motor 2, oil pump 3, outer radiating tube 4 with
And fan blade 5, fuel tank 1 is interior to be provided with the pump housing 10 and pump oil 6, and the left side outer wall of fuel tank 1 is provided with electric machine support 7, and motor 2 is arranged on
On electric machine support 7, outer radiating tube 4 is connected on the left side outer wall of the fuel tank 1 at the place of electric machine support 7, and oil pump 3 is located in fuel tank 1
In chamber, output shaft one end of motor 2 passes through with fuel tank 1 and is connected with oil pump 3, and the outer two-port of radiating tube 4 both passes through fuel tank 1
And be connected communicate with the oil inlet and oil-out of oil pump 3 respectively, fan blade 5 is connected to the motor 2 between motor 2 and outer radiating tube 4
On output shaft, it is equipped with the forward and backward outer wall of fuel tank 1 on the outside of a plurality of horizontal convex tendon 8, the forward and backward outer wall of fuel tank 1 and is equipped with envelope
Plate 9, shrouding 9 is connected on horizontal convex tendon 8, and the left part of shrouding 9 is connected on electric machine support 7, forms electric machine support 7 and shrouding 9
The tubular structure of one both ends open, outer radiating tube 4 is located in the tubular structure, and fan blade 5 is located in tubular structure, outer radiating
The spiral domain of pipe 4 is on the outside of the output shaft of motor 2, and outer radiating tube 4 is finned radiating tube, between fuel tank 1 and the output shaft of motor 2
Provided with bearing 24, the outer wall of fuel tank 1 in the left side of bearing 24 is provided with closure 25, and the setting of bearing 24 can effectively ensure that motor 2
The operation stability of output shaft, it is ensured that the output shaft of motor 2 will not produce swing, the setting of closure 25 can avoid pump oil 6 from letting out
Reveal outside fuel tank 1, fuel tank 1, which is provided with air inlet 11 and exhaust outlet 12, the pump housing 10, is provided with rotor 26 and blade 27, on the pump housing 10
Provided with air admission hole 13 and venthole 14, the pump housing 10 in the exit of venthole 14 is provided with screen 28 and oil baffle 29, air inlet 11
Connected between air admission hole 13 by air inlet pipe 15, the pump housing 10 between the outlet of air inlet pipe 15 and air admission hole 13 is provided with air inlet
Provided with the interior radiating tube 16 communicated with external water source, the water inlet 31 of interior radiating tube 16 in fuel tank 1 outside valve 30, the pump housing 10
It is arranged at delivery port 32 on fuel tank 1, the interior bottom of radiating tube 16 is immersed in pump oil 6, one is connected with the pump housing 10 can be by
The exhaust screen 17 being extracted at the inside radiating tube 16 of gas guiding come out from venthole 14, exhaust screen 17 is located at venthole
14 tops, one end of exhaust screen 17 is connected on the pump housing 10, and the other end of exhaust screen 17 is provided with a bending part 18 obliquely,
Interior radiating tube 16 is located at the lower section of bending part 18, and interior radiating tube 16 is that inlet cylinder 19 is provided with finned radiating tube, air inlet 11,
The import of air inlet pipe 15 is communicated with the side wall of inlet cylinder 19, and the lower end of inlet cylinder 19 below the import of air inlet pipe 15 forms dislodger
20, inlet cylinder 19 is connected with air inlet screen 21 with the side wall at the import place of communicating of air inlet pipe 15, and inlet cylinder 19 enters with air inlet pipe 15
Mouth communicates the annular slot 22 of the side wall provided with upper end open at place, and air inlet screen 21 is arranged in annular slot 22, positioned at row
The inwall of fuel tank 1 at gas port 12 is provided with exhaust screen 23, and the setting of exhaust screen 23 will can be extracted entrained by gas
Pump oil 6 is filtered so that from exhaust outlet 12 discharge to be extracted gas more clean, make sliding vane rotary vacuum pump of the present invention more ring
Protect.
Embodiment above is only that the preferred embodiment of the present invention is described, and not the scope of the present invention is entered
Row is limited, on the premise of design spirit of the present invention is not departed from, and those of ordinary skill in the art make to technical scheme
In the various modifications gone out and improvement, the protection domain that claims of the present invention determination all should be fallen into.
Claims (10)
1. being provided with the pump housing (10) and pump oil (6) in a kind of sliding vane rotary vacuum pump, including fuel tank (1), the fuel tank (1), its feature exists
In：Also include motor (2), oil pump (3), outer radiating tube (4) and fan blade (5), the left side outer wall of the fuel tank (1) is provided with electricity
Machine support (7), the motor (2) is arranged on electric machine support (7), and outer radiating tube (4) is connected to the oil where electric machine support (7)
On the left side outer wall of case (1), the oil pump (3) is located in fuel tank (1) inner chamber, output shaft one end of the motor (2) pass through with
Fuel tank (1) simultaneously with oil pump (3) be connected, outer radiating tube (4) two-port both pass through fuel tank (1) and respectively with oil pump (3)
Oil inlet and oil-out connection communicate, the motor (2) that the fan blade (5) is connected between motor (2) and outer radiating tube (4) is defeated
On shaft.
2. sliding vane rotary vacuum pump according to claim 1, it is characterised in that：It is equipped with the forward and backward outer wall of the fuel tank (1)
A plurality of horizontal convex tendon (8).
3. sliding vane rotary vacuum pump according to claim 2, it is characterised in that：The outside of the forward and backward outer wall of the fuel tank (1) is equal
Provided with shrouding (9), the shrouding (9) is connected on horizontal convex tendon (8), and shrouding (9) left part is connected to electric machine support (7)
On, make the tubular structure of electric machine support (7) and shrouding (9) one both ends open of formation, the outer radiating tube (4) is located at the tubular
In structure.
4. sliding vane rotary vacuum pump according to claim 3, it is characterised in that：The fan blade (5) is located in tubular structure.
5. sliding vane rotary vacuum pump according to claim 1, it is characterised in that：The spiral domain of the outer radiating tube (4) is in electricity
On the outside of machine (2) output shaft.
6. sliding vane rotary vacuum pump according to claim 1, it is characterised in that：The outer radiating tube (4) is finned radiating tube.
7. the sliding vane rotary vacuum pump according to claim 1~6 any one, it is characterised in that：The fuel tank (1) be provided with into
Gas port (11) and exhaust outlet (12), the pump housing (10) are provided with air admission hole (13) and venthole (14), the air inlet (11)
Connected, be provided with and external water source in the outside fuel tank (1) of the pump housing (10) by air inlet pipe (15) between air admission hole (13)
The interior radiating tube (16) communicated, interior radiating tube (16) bottom is immersed in pump oil (6), and one is connected with the pump housing (10)
The exhaust screen (17) being extracted from the inside radiating tube (16) of gas guiding that will can be come out from venthole (14).
8. sliding vane rotary vacuum pump according to claim 7, it is characterised in that：The exhaust screen (17) is located at venthole (14)
Top, described exhaust screen (17) one end is connected on the pump housing (10), and exhaust screen (17) other end is oblique provided with one
Under bending part (18), the interior radiating tube (16) be located at bending part (18) below.
9. sliding vane rotary vacuum pump according to claim 8, it is characterised in that：Air inlet (11) place is provided with inlet cylinder
(19), the import of the air inlet pipe (15) is communicated with the side wall of inlet cylinder (19), the air inlet below air inlet pipe (15) import
Cylinder (19) lower end forms dislodger (20).
10. sliding vane rotary vacuum pump according to claim 9, it is characterised in that：The inlet cylinder (19) is entered with air inlet pipe (15)
Air inlet screen (21) is connected with the side wall at the mouth place of communicating, the inlet cylinder (19) communicates the side wall at place with air inlet pipe (15) import
The annular slot (22) of upper end open is provided with, the air inlet screen (21) is arranged in annular slot (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710242311.2A CN107023485B (en) | 2017-04-12 | 2017-04-12 | Rotary vane vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710242311.2A CN107023485B (en) | 2017-04-12 | 2017-04-12 | Rotary vane vacuum pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107023485A true CN107023485A (en) | 2017-08-08 |
| CN107023485B CN107023485B (en) | 2020-03-27 |
Family
ID=59527843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710242311.2A Active CN107023485B (en) | 2017-04-12 | 2017-04-12 | Rotary vane vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107023485B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654375A (en) * | 2017-11-06 | 2018-02-02 | 温岭市挺威真空设备有限公司 | A kind of oil seal type oil-sealed rotary pump pump head |
| CN107989778A (en) * | 2017-12-28 | 2018-05-04 | 澳优乳业（中国）有限公司 | A kind of vacuum pump protective device |
| CN110925205A (en) * | 2019-12-02 | 2020-03-27 | 厚力德机器（杭州）有限公司 | Individual household closestool vacuum pump |
| CN112032025A (en) * | 2020-09-10 | 2020-12-04 | 河北通嘉宏盛科技有限公司 | Vacuum pump protection box with air circulation filtering and cooling functions |
| CN114294230A (en) * | 2021-12-31 | 2022-04-08 | 北京北仪优成真空技术有限公司 | Oil extraction cooling structure of high-pumping-speed rotary vane pump |
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| CN203175861U (en) * | 2013-04-01 | 2013-09-04 | 浙江真空设备集团有限公司 | Vacuum pump |
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