CN108223376A - A kind of gear for engine interior drives vacuum pump - Google Patents
A kind of gear for engine interior drives vacuum pump Download PDFInfo
- Publication number
- CN108223376A CN108223376A CN201810173407.2A CN201810173407A CN108223376A CN 108223376 A CN108223376 A CN 108223376A CN 201810173407 A CN201810173407 A CN 201810173407A CN 108223376 A CN108223376 A CN 108223376A
- Authority
- CN
- China
- Prior art keywords
- elongated end
- oil
- housing
- blade
- pump housing
- 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.)
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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
-
- 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
-
- 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
-
- 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
- F04C2240/00—Components
- F04C2240/20—Rotors
-
- 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
- F04C2240/00—Components
- F04C2240/30—Casings or housings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The present invention relates to a kind of gears for engine interior to drive vacuum pump, including the pump housing（1）, in the pump housing（1）It is provided with rotor（2）, it is characterised in that：In the rotor（2）Circumferential direction on, close to each blade groove（21）Opening portion, and positioned at blade（3）Both sides be provided with the oblique rib of inner conical（6）；Each blade（3）Outboard end（31）It is shaped to parabolic type, and this parabola shaped meets equation：y=ax2+ bx+c, wherein ︱ a ︱=N ︱ b ︱, ︱ b ︱=M ︱ c ︱, and meet N<M；Fluid volume simple in structure, that abrasion is small, working efficiency is high, the rotation of each blade was scraped improves, while can realize that fluid flows back, and fluid utilization rate is high, reduces use cost.
Description
Technical field
The present invention relates to a kind of vacuum pumps more particularly to a kind of gear for engine interior to drive vacuum pump.
Background technology
Vehicle-mounted vacuum pump is the power source of diesel vehicle hydraulic brake booster mostly, because of gasoline-powered vehicle
Since engine is using spark ignition type, thus higher vacuum pressure can be generated in inlet manifold, can be vacuum servo system
Dynamic system provides enough vacuum sources, and for the vehicle of diesel engine drives, since engine is using compression-ignited, in this way
The vacuum pressure of phase same level cannot be provided at inlet manifold, so needing to install the vacuum pump for providing vacuum source.And show
Have that the fluid volume that the complexity of the vacuum pump structure in technology, serious wear, working efficiency be low, the rotation of each blade was scraped is few, and
Reflowing result is poor, fluid excess waste, and use cost is high.
Invention content
The technical problem to be solved by the present invention is to：For the deficiencies in the prior art and defect, one kind is provided and is used for
The gear driving vacuum pump of engine interior, fluid simple in structure, abrasion is small, working efficiency is high, the rotation of each blade was scraped
Volume improves, while can realize that fluid flows back, and fluid utilization rate is high, reduces use cost.
The technical solution adopted by the present invention to solve the technical problems is：It is a kind of true for the gear driving of engine interior
Sky pump, including the pump housing（1）, in the pump housing（1）It is provided with rotor（2）, rotor（2）On offer three blade grooves（21）, three leaves
Film trap（21）It is evenly distributed on rotor（2）Circumferential direction, and adjacent two blade grooves（21）Between mutually in the settings of 60 degree angles, three
Blade groove（21）Inside is both provided with blade（3）, the pump housing（1）On be provided with and drive gear（5）The driving being molded as one
Axis（4）, drive shaft（4）Pass through drive gear（5）It is connect with engine power output shaft；
It is characterized in that：
In the rotor（2）Circumferential direction on, close to each blade groove（21）Opening portion, and positioned at blade（3）Both sides
It is provided with the oblique rib of inner conical（6）；
Each blade（3）The end that outside is contacted with 1 inner wall of the pump housing（31）Parabolic type is shaped to, and this is parabola shaped full
Sufficient equation：y=ax2+ bx+c, wherein ︱ a ︱=N ︱ b ︱, ︱ b ︱=M ︱ c ︱, and meet N<M.
Further, the rotor（2）With the pump housing（1）Compression chamber is formed between inner wall（11）, in the pump housing（1）
Side inner wall on be provided with the bleeding point led to outside the pump housing（7）.
Further, in the pump housing（1）Opposite side inner wall on be provided with oil-discharging cavity（8）, in oil-discharging cavity（8）Upper setting
There is exhaust and the oil discharge outlet led to outside the pump housing（9）.
Further, the pump housing（1）Outside is by the housing that is fixed to each other（1a）And shield（1b）Composition, the housing
（1a）Protrusion is provided with the first elongated end positioned at upside radially（1a1）, the housing（1a）Also protrusion is set radially
It is equipped with the second elongated end of the multi-step shape positioned at downside（1a2）, the shield（1b）Protrusion is provided with and the radially
One elongated end（1a1）, the second elongated end（1a2）The corresponding shield elongated end in position（1b1）, shield elongated end（1b1）With
Two elongated ends（1a2）Inner side step face and the first elongated end（1a1）It is engaged by clamping, and shield elongated end（1b1）Radially
On development length be less than the first elongated end（1a1）, the second elongated end（1a2）Diametrical development length.
Further, second elongated end（1a2）By the installation elongated end for being located inside（1a21）With positioned at outside
Process elongated end（1a22）Composition, the shield elongated end（1b1）Diametrical development length is less than processing elongated end
（1a22）Diametrical development length, and the shield elongated end（1b1）Diametrical development length is more than installation and extends
End（1a21）Diametrical development length.
Further, the oil-discharging cavity（8）It is set as lobed, and the arc-shaped and pump housing of its both sides（1）Inner wall and turn
Son（2）Periphery circular arc match, the oil-discharging cavity（9）It is set to rotor in the axial direction（2）With housing（1a）Between.
Further, the housing（1a）On be additionally provided with housing handle（1c）, housing handle（1c）On offer V-shaped
Oil-feed tank（1c1）With the lightening grooves of L-shaped（1c2）, the lightening grooves（1c2）It is set to the oil-feed tank（1c1）Inside,
The oil-feed tank（1c1）One end be additionally provided with the oil inlet for leading to pump body（1c11）, in the lightening grooves（1c2）L
Shape is open and the oil-feed tank（1c1）V-arrangement apex angle between be additionally provided with mounting hole（1c3）.
Further, the housing handle（1c）Interior oil-feed tank（1c1）In, and positioned at oil inlet（1c11）Nearby also set
It is equipped with steel ball（1d）.
Further, the steel ball（1d）Diameter be more than oil inlet（1c11）Diameter and slightly larger than oil-feed tank（1c1）
Diameter.
The beneficial effects of the invention are as follows：
（1）In the circumferential direction of rotor, the oblique of inner conical is provided with close to the opening portion of each blade groove, and positioned at the both sides of blade
To rib, be conducive to when rotor rotates, blade is because centrifugal action is thrown away from blade groove, so as to will surprisingly be mixed into blade groove
In fluid take advantage of a situation discharge, simultaneously because the oblique rib using inner conical, moreover it is possible to effectively prevent the fluid of blade groove opening portion
It flows back into inside blade groove again, in addition, the also opposite fluid volume expanded between adjacent blades of the oblique rib of inner conical,
So that blade rotates the fluid volume increase of carrying every time, vacuum efficiency is improved；
（2）Each blade outboard end shape is set as parabolic type, arc-shaped relative to what is used in the prior art, is ensureing
Good contact and on the basis of seamlessly transitting, increases effectively the crevice volume between blade outboard end and pump housing inner wall, from
And cause the fluid volume being filled into crevice volume increase, so that blade rotates the fluid volume increase of carrying every time,
Improve vacuum efficiency.
Description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is a kind of the structure left view of gear driving vacuum pump for engine interior of the present invention；
Fig. 2 is a kind of vertical cross-sectional of belt driving vacuum pump for external engine of the present invention；
Fig. 3 is a kind of structure right view of belt driving vacuum pump for external engine of the present invention；
In figure：The 1--- pump housings, 11--- compression chambers, 1a--- housings, 1b--- shields, the first elongated ends of 1a1---, 1a2--- second
Elongated end, 1a21--- installation elongated end, 1a22--- processing elongated end, 1b1--- shields elongated end, 1c--- housings handle,
1c1--- oil-feed tanks, 1c2--- lautertuns, 1c11--- oil inlets, 1c3--- mounting holes, 1d--- steel balls, 2--- rotors, 21---
Blade groove, 3--- blades, 31--- outboard ends, 4--- drive shafts, 5--- drive gears, the oblique ribs of 6---, 7--- pumpings
Mouth, 8--- oil-discharging cavities, 9--- exhaust and oil discharge outlet.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates the basic structure of the present invention, therefore it only shows composition related to the present invention.
As shown in Figs. 1-3, a kind of gear for engine interior drives vacuum pump, and including the pump housing 1,1 is set in the pump housing
There is rotor 2, three blade grooves 21 are offered on rotor 2, three blade grooves 21 are evenly distributed on the circumferential direction of rotor 2, and adjacent two
Mutually in 60 degree angles settings between blade groove 21, blade 3 is both provided with inside three blade grooves 21, leaf during facilitating rotation
Piece 3 can uniformly be thrown away blade groove 21 because of centrifugal action, while conducive to processing and manufacturing, be provided on the pump housing 1 and sliding tooth
The drive shaft 4 that wheel 5 is molded as one, drive shaft 4 are connect by drive gear 5 with engine power output shaft, so as to pass through hair
Motivation rotation drives drive gear 5 and drive shaft 4 to rotate, and then rotor 2 is driven to act；
In the circumferential direction of rotor 2, inner conical is provided with close to the opening portion of each blade groove 21, and positioned at the both sides of blade 3
Oblique rib 6, when rotor rotates, blade is because centrifugal action is thrown away from blade groove, so as to will surprisingly be mixed into blade groove
Fluid is taken advantage of a situation discharge, simultaneously because the oblique rib using inner conical, moreover it is possible to the fluid of blade groove opening portion be effectively prevent to return again
Stream enters inside blade groove, in addition, the also opposite fluid volume expanded between adjacent blades of the oblique rib of inner conical so that
Blade rotates the fluid volume increase of carrying every time, improves vacuum efficiency；As a further preference, the both sides setting of blade 3
Inner conical oblique rib 6 between each other in 150 to the angle between 180 degree.
The end 31 that each 3 outside of blade is contacted with pump housing inner wall is shaped to parabolic type, relative to the prior art
Middle use it is arc-shaped, ensureing good contact and on the basis of seamlessly transitting, increasing effectively blade outboard end and the pump housing
Crevice volume between inner wall, so that the fluid volume increase being filled into crevice volume, so that blade revolves every time
Turn the fluid volume carried increase, improve vacuum efficiency；
And this parabola shaped meets equation：y=ax2+ bx+c, wherein ︱ a ︱=N ︱ b ︱, ︱ b ︱=M ︱ c ︱, and meet N<M, according to parabolic
The linear feature of line is it is found that ︱ a ︱ are bigger, and parabola opening is smaller, so as to the gap between blade outboard end and pump housing inner wall
Volume is smaller, but ︱ a ︱ are bigger, and the contact area between blade outboard end and pump housing inner wall is also smaller, good contact performance
Cannot be guaranteed with performance is seamlessly transitted, by test of many times the result shows that, when it meets ︱ a ︱=N ︱ b ︱, ︱ b ︱=M ︱ c ︱,
And meet N<During M, effect reaches best.
Specifically, compression chamber 11 is formed between 1 inner wall of rotor 2 and the pump housing, is provided with and leads on the side inner wall of the pump housing 1
Bleeding point 7 outside the pump housing is provided with oil-discharging cavity 8 on the opposite side inner wall of the pump housing 1, is provided on oil-discharging cavity 8 and leads to pump
Exhaust and oil discharge outlet 9 outside body in 2 rotary course of rotor, mix in 1 compression chamber 11 of the pump housing in remaining air and fluid
On the one hand the air entered is extracted out through bleeding point 7, on the other hand the gas not exhausted is then discharged by exhaust and oil discharge outlet 9.
Specifically, 1 outside of the pump housing is made of the housing 1a and shield 1b that are fixed to each other, and housing 1a protrudes setting radially
There is the first elongated end 1a1 positioned at upside, also protrusion is provided with the of multi-step shape positioned at downside to housing 1a radially
Two elongated end 1a2, to meet the needs of the installation of different height and position and machining positioning, shield 1b protrudes radially
Be provided with the first elongated end 1a1, the second corresponding shield elongated end 1b1 in elongated end 1a2 positions, shield elongated end 1b1 with
The inner side step face of second elongated end 1a2 and the first elongated end 1a1 are engaged by clamping, and shield elongated end 1b1 is diametrical
Development length is less than the first elongated end 1a1, the second diametrical development lengths of elongated end 1a2, to ensure the effect connected and fixed
Fruit.
Specifically, installation elongated end 1a21s of the second elongated end 1a2 by being located inside and the processing elongated end positioned at outside
1a22 is formed, and the diametrical development lengths of shield elongated end 1b1 are less than the processing diametrical development lengths of elongated end 1a22,
And the diametrical development lengths of shield elongated end 1b1 are more than the installation diametrical development lengths of elongated end 1a21 so that strong
Spending relatively low shield 1b can connect and fix on the installation elongated end 1a21 of the relatively high housing 1a of intensity, to improve
Fixed effect ensures that clamping is secured；Machine is clamped and is positioned by processing elongated end 1a22 realizations when facilitating processing simultaneously.
Specifically, oil-discharging cavity 8 is set as lobed, and the periphery of 1 inner wall of the arc-shaped and pump housing of its both sides and rotor 2 is justified
Arc matches, and oil-discharging cavity 8 is set in the axial direction between rotor 2 and housing 1a, is ensureing that contact is good, is seamlessly transitting and fully
While scraping effect so that the exhaust for the oil-discharging cavity 8 that the fluid scraped is set up by axis and oil discharge outlet 9 are discharged.
Specifically, housing handle 1c is additionally provided on housing 1a, the oil-feed tank 1c1 of V-shaped is offered on housing handle 1c
The inside of oil-feed tank 1c1 is set to the lightening grooves 1c2 of L-shaped, lightening grooves 1c2, one end of oil-feed tank 1c1, which is additionally provided with, to be led to
The oil inlet 1c11 of pump body is additionally provided with installation between the L-shaped opening and the V-arrangement apex angle of oil-feed tank 1c1 of lightening grooves 1c2
Hole 1c3, as a further preference, L-shaped opening are open for circular arc, and mounting hole 1c3 is set to the circle centre position of the circular arc, V-arrangement top
After the angle at angle is set as 150 degree of oil inlet 1c11 set to one end that between 180 degree, fluid enters oil groove 1c1, through oil inlet
It is passed through inside the pump housing 1 after the filter device of mouth 1c11 settings, to ensure the cleannes of fluid.
Specifically, in the oil-feed tank 1c1 in housing handle 1c, and nearby steel ball 1d is additionally provided with positioned at oil inlet 1c11.
Specifically, diameter of the diameter of steel ball 1d more than oil inlet 1c11 and the diameter slightly larger than oil-feed tank 1c1, oil-feed tank
For 1c1 after machining, remaining has the channel outside connection, setting steel ball that can block oil inlet after entering oil-feed tank 1c1
It blocks and is stuck in oil-feed tank 1c1 while 1c11, so as to which fluid be avoided to reveal.
Using above-mentioned desirable embodiment according to the present invention as enlightenment, by above-mentioned description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the content on specification, it is necessary to determine its technical scope according to right.
Claims (9)
1. a kind of gear for engine interior drives vacuum pump, including the pump housing（1）, in the pump housing（1）It is provided with rotor（2）,
Rotor（2）On offer three blade grooves（21）, three blade grooves（21）It is evenly distributed on rotor（2）Circumferential direction, and adjacent two
Blade groove（21）Between mutually in the settings of 60 degree angles, three blade grooves（21）Inside is both provided with blade（3）, the pump housing（1）
On be provided with and drive gear（5）The drive shaft being molded as one（4）, drive shaft（4）Pass through drive gear（5）With start it is motor-driven
Power output shaft connects；
It is characterized in that：
In the rotor（2）Circumferential direction on, close to each blade groove（21）Opening portion, and positioned at blade（3）Both sides
It is provided with the oblique rib of inner conical（6）；
Each blade（3）The end that outside is contacted with pump housing inner wall（31）Parabolic type is shaped to, and this is parabola shaped full
Sufficient equation：y=ax2+ bx+c, wherein ︱ a ︱=N ︱ b ︱, ︱ b ︱=M ︱ c ︱, and meet N<M.
2. vacuum pump according to claim 1, it is characterised in that：The rotor（2）With the pump housing（1）Shape between inner wall
Into compression chamber（11）, in the pump housing（1）Side inner wall on be provided with the bleeding point led to outside the pump housing（7）.
3. vacuum pump according to claim 2, it is characterised in that：In the pump housing（1）Opposite side inner wall on be provided with
Oil-discharging cavity（8）, in oil-discharging cavity（8）On be provided with exhaust and the oil discharge outlet led to outside the pump housing（9）.
4. vacuum pump according to claim 3, it is characterised in that：The pump housing（1）Outside is by the housing that is fixed to each other
（1a）And shield（1b）Composition, the housing（1a）Protrusion is provided with the first elongated end positioned at upside radially（1a1）, institute
State housing（1a）The second elongated end for being provided with the multi-step shape positioned at downside is also protruded radially（1a2）, the shield
（1b）Protrusion is provided with and the first elongated end radially（1a1）, the second elongated end（1a2）The corresponding shield elongated end in position
（1b1）, shield elongated end（1b1）With the second elongated end（1a2）Inner side step face and the first elongated end（1a1）Clamping is matched
It closes, and shield elongated end（1b1）Diametrical development length is less than the first elongated end（1a1）, the second elongated end（1a2）In diameter
Upward development length.
5. vacuum pump according to claim 4, it is characterised in that：Second elongated end（1a2）By the peace for being located inside
Fill elongated end（1a21）With the processing elongated end positioned at outside（1a22）Composition, the shield elongated end（1b1）It is diametrical
Development length is less than processing elongated end（1a22）Diametrical development length, and the shield elongated end（1b1）Radially
Development length be more than installation elongated end（1a21）Diametrical development length.
6. vacuum pump according to claim 5, it is characterised in that：The oil-discharging cavity（8）It is set as lobed, and its both sides
The arc-shaped and pump housing（1）Inner wall and rotor（2）Periphery circular arc match, the oil-discharging cavity（8）It is set to and turns in the axial direction
Son（2）With housing（1a）Between.
7. vacuum pump according to claim 4, it is characterised in that：The housing（1a）On be additionally provided with housing handle
（1c）, housing handle（1c）On offer the oil-feed tank of V-shaped（1c1）With the lightening grooves of L-shaped（1c2）, the lightening grooves
（1c2）It is set to the oil-feed tank（1c1）Inside, the oil-feed tank（1c1）One end be additionally provided with and lead to pump body
Oil inlet（1c11）, in the lightening grooves（1c2）L-shaped opening and the oil-feed tank（1c1）V-arrangement apex angle between be additionally provided with
Mounting hole（1c3）.
8. vacuum pump according to claim 7, it is characterised in that：The housing handle（1c）Interior oil-feed tank（1c1）In,
And positioned at oil inlet（1c11）Nearby it is additionally provided with steel ball（1d）.
9. vacuum pump according to claim 8, it is characterised in that：The steel ball（1d）Diameter be more than oil inlet（1c11）
Diameter and slightly larger than oil-feed tank（1c1）Diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810173407.2A CN108223376A (en) | 2018-03-02 | 2018-03-02 | A kind of gear for engine interior drives vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810173407.2A CN108223376A (en) | 2018-03-02 | 2018-03-02 | A kind of gear for engine interior drives vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108223376A true CN108223376A (en) | 2018-06-29 |
Family
ID=62662515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810173407.2A Withdrawn CN108223376A (en) | 2018-03-02 | 2018-03-02 | A kind of gear for engine interior drives vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108223376A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406225A (en) * | 2018-12-12 | 2019-03-01 | 青岛海颐天仪器有限公司 | The vacuum sampling pump acquired for flue gas in atmosphere and particulate matter |
-
2018
- 2018-03-02 CN CN201810173407.2A patent/CN108223376A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406225A (en) * | 2018-12-12 | 2019-03-01 | 青岛海颐天仪器有限公司 | The vacuum sampling pump acquired for flue gas in atmosphere and particulate matter |
| CN109406225B (en) * | 2018-12-12 | 2024-04-26 | 青岛海颐天仪器有限公司 | Vacuum sampling pump for collecting smoke and particulate matters in atmosphere |
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Application publication date: 20180629 |