CN208252344U - A kind of single-chamber asymmetry sliding-vane-type vacuum pump - Google Patents
A kind of single-chamber asymmetry sliding-vane-type vacuum pump Download PDFInfo
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- CN208252344U CN208252344U CN201820791395.5U CN201820791395U CN208252344U CN 208252344 U CN208252344 U CN 208252344U CN 201820791395 U CN201820791395 U CN 201820791395U CN 208252344 U CN208252344 U CN 208252344U
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- cylinder
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- sliding
- vane
- vacuum pump
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Abstract
The utility model discloses a kind of single-chamber asymmetry sliding-vane-type vacuum pumps, are related to field of fluid machinery；Mainly it is made of slide plate (1), cylinder (2), rotor (3), upper end cover (4) and lower cover (5)；Cylinder profile (201) is a second dervative continuously asymmetric closed curve, and catastrophe point is not present in continuous and derivable, and there is no make cylinder profile (201) about its axial symmetry by the center line of the centre of gyration；In the course of work, by be formed by volume can periodically variable working chamber chamber, realize air-breathing, compression and the exhaust of sliding-vane-type vacuum pump.The utility model can effectively improve the interior volume specific ratio of sliding-vane-type vacuum pump, seal clearance is small between cylinder profile (201) and rotor (3) outer contour, slide plate (1) top remains with the inner wall of cylinder (2) and is bonded in exhaust process, is conducive to the exhaust sealing of sliding-vane-type vacuum pump；Be conducive to improve slide plate (1) stress simultaneously, reduce frictional dissipation.
Description
Technical field
The utility model belongs to field of fluid machinery, and in particular to a kind of single-chamber asymmetry sliding-vane-type vacuum pump.
Background technique
Sliding-vane-type vacuum pump is a kind of rotary displacement vacuum pump, passes through what is formed between rotor outer circle cylinder and inboard wall of cylinder block
Periodically variable crescent chamber realizes air-breathing, pressurization and the exhaust of gas；Since its structure is simple, small in size, components
Less, noise is low and smooth running and is widely used in fore pump air-extractor and automobile brake boosting system.Common list
The cylinder profile of chamber sliding-vane-type vacuum pump is usually circle, and this cylinder profile will cause the interior volume specific ratio of sliding-vane-type vacuum pump
Small, the line in sealing contact between rotor and inboard wall of cylinder block is short, be easy to cause the connection of high pressure chest and low pressure chamber, it is true to be unfavorable for slide sheet type
The exhaust sealing of sky pump.
The patent of Publication No. CN 107654374A proposes a kind of electronic vacuum pump, but the utility model still has not
Foot place, rotor is eccentrically mounted with cylinder, and cylinder profile is circle, and cylinder profile is about the rotor centre of gyration and circular cylinder type
The line axial symmetry at line center, the interior volume specific ratio of electronic vacuum pump do not improve, and rotor and the contact line in cylinder inner wall face are short, according to
So there are problems that interior volume specific ratio is small, line in sealing contact is short, exhaust phase high-pressure chamber is easy to be connected to low-pressure chamber.
Summary of the invention
It is small in order to solve the interior volume specific ratio that existing circular cylinder molded line will cause sliding-vane-type vacuum pump, in rotor and cylinder body
Line in sealing contact between wall is short, be easy to cause the connection of high pressure chest and low pressure chamber, lead to the problem of exhaust gas leakage and slide plate by
" coming to nothing " problem when power is bad, the cylinder the utility model proposes a kind of single-chamber asymmetry sliding-vane-type vacuum pump, on cylinder
Molded line is a second dervative continuously asymmetric closed curve, and continuous and derivable is there is no catastrophe point and there is no pass through revolution
The center line of central point makes cylinder profile about its axial symmetry, from C to A the cylinder profile of point-to-point transmission (including C, A two o'clock) with turn
Gap between the outer contour of son is gradually increased, and the polar diameter of cylinder profile is by R3Increase to R3+ 0.04, by A point to B point cylinder type
The polar diameter of line increases rapidly, and reaches maximum at B point, tracing pattern is by A point to the precipitous rising of B point, by B point to C point cylinder type
The polar diameter of line starts to be gradually reduced, and curve gradually becomes gentle.The internal volume of sliding-vane-type vacuum pump can be improved in the utility model
Than the sealing wire length that rotor and cylinder inner wall are formed well separates high-pressure chamber and low-pressure chamber, sliding in exhaust process
Piece is remained with cylinder inner wall and is bonded, and is conducive to exhaust sealing；Asymmetric cylinder profile this simultaneously is conducive to improve slide plate
Force-bearing situation, for enrich sliding-vane-type vacuum pump cylinder profile and promote sliding-vane-type vacuum pump development have important meaning
Justice.
To achieve the goals above, the utility model adopts the following technical solution:
A kind of single-chamber asymmetry sliding-vane-type vacuum pump, comprising: slide plate (1), cylinder (2), rotor (3), upper end cover (4) and under
End cap (5), the cylinder profile (201) on the cylinder (2) is a second dervative continuously asymmetric closed curve, i.e.,
Catastrophe point is not present in cylinder profile (201) continuous and derivable, and there is no make cylinder profile by the center line of its centre of gyration point O
(201) about its axial symmetry；Cylinder profile (201) is using its centre of gyration point O as coordinate origin, cylinder profile (201) polar coordinates
Equation are as follows:
In formula: R1- cylinder profile tip circle radius, mm；R3- cylinder profile bottom radius of circle, mm；T-angle parameter, rad；
The value range of n-power exponent, n are 1≤n≤3.5；
There are tri- particular points of A, B, C on the cylinder profile (201): the first point A is located at ρ (0)=R3Point；Second point
B is the farthest point away from centre of gyration point O on cylinder profile (201), and polar diameter is maximum value；As t is gradually increased from 0, thirdly C
Polar diameter ρ=R on cylinder profile (201)3+ 0.04 place；In the cylinder profile (201), it is corresponding between A, C two o'clock in
Heart angle ∠ AOC is α；C, corresponding central angle ∠ COB is γ between B two o'clock, and corresponding central angle ∠ BOA is between B, A two o'clock
3 points of β, A, B, C meet geometrical relationship: γ > β；+ β=360 ° α+γ；In the cylinder profile (201), by A point to B point gas
The polar diameter of cylinder molded line (201) increases rapidly, and reaches maximum at B point, tracing pattern by A point to the precipitous rising of B point, by B point to C
The polar diameter of point cylinder profile (201) starts to be gradually reduced, and curve gradually becomes gentle.
A kind of single-chamber asymmetry sliding-vane-type vacuum pump, the cylinder (2) is with the concentric installation of rotor (3), the two o'clock from C to A
Between gap between the cylinder profile (201) (including C, A two o'clock) and the outer contour of rotor (3) be gradually increased, cylinder profile
(201) polar diameter is by R3Increase to R3+0.04；The two sides of the cylinder (2) are installed by upper end cover (4) and lower cover with one heart respectively
(5), air entry (401) and upper exhaust outlet (402) are opened up on upper end cover (4), and lower air entry (501) are opened up on lower cover (5)
With lower exhaust outlet (502)；The lower air entry (501) on upper air entry (401) and lower cover (5) on the upper end cover (4)
Projected position in end face direction is completely coincident, the upper exhaust outlet (402) of the upper end cover (4) and the lower exhaust of lower cover (5)
The projected position of mouth (502) in end face direction is completely coincident；Radial groove (301), sliding slot are provided on the rotor (3)
(301) quantity is 6~8, and being inlaid in each sliding slot (301) can be with free-moving slide plate (1), when rotor (3) rotates
The top of slide plate (1) and the inner wall of cylinder (2) fit closely holding sealing.
A kind of single-chamber asymmetry sliding-vane-type vacuum pump, upper air entry (401), lower air entry (501) position be located at slide plate
The lucky end of life of formula vacuum pump breathing process, working chamber volume just reach maximum value；According to the internal volume of sliding-vane-type vacuum pump
Than so that working chamber and upper exhaust outlet (402) and lower exhaust outlet (502) are detached from instantaneous volumetric values minimum when exhaust, thus really
Surely the position of upper exhaust outlet (402) and lower exhaust outlet (502).
The beneficial effects of the utility model are:
(1) interior volume specific ratio of sliding-vane-type vacuum pump can be improved using asymmetric cylinder profile.
(2) slide plate can be bonded with the holding of the inner wall of cylinder always in the exhaust process of sliding-vane-type vacuum pump, especially
It is the exhaust phase in sliding-vane-type vacuum pump, is not in that slide plate " comes to nothing " phenomenon, is conducive to improve the interior of sliding-vane-type vacuum pump
Leakage, achievees the effect that exhaust sealing.
(3) this asymmetric cylinder profile continuous and derivable and single order, second dervative are continuous, there is no rigid shock points and soft
Property shock point, be conducive to improve slide plate force-bearing situation, reduce slide plate and cylinder inner wall face frictional dissipation.
(4) gas when rotor is turned in range corresponding to A, C two o'clock (including A, C two o'clock), on the cylinder (2)
The gap of 0~0.04mm is able to maintain between cylinder molded line (201) and rotor (3) outer contour, sealing effect is good.
Detailed description of the invention
Fig. 1 is single-chamber asymmetry sliding-vane-type vacuum pump assembly relation schematic diagram.
Fig. 2 is cylinder profile master map.
Fig. 3 is rotor main view.
Fig. 4 is upper end cover main view.
Fig. 5 is lower cover main view.
Fig. 6 is breathing process schematic diagram.
Fig. 7 is that breathing process terminates schematic diagram.
Fig. 8 is compression process schematic diagram.
Fig. 9 is that exhaust will start schematic diagram.
Figure 10 is exhaust process schematic diagram.
In figure: R1- cylinder profile tip circle radius；R3- cylinder profile bottom radius of circle；α-A, the corresponding central angle of C two o'clock；
γ-B, the corresponding central angle of C two o'clock；β-A, the corresponding central angle of B two o'clock；1-slide plate；2-cylinders；3-rotors；On 4-
End cap；5-lower covers.
Specific embodiment
The utility model is described in further detail with embodiment with reference to the accompanying drawing.
As shown in Figure 1, being single-chamber asymmetry sliding-vane-type vacuum pump assembly relation schematic diagram, by slide plate (1), cylinder (2), turn
Sub (3), upper end cover (4) and lower cover (5) each components are assembled to obtain assembly relation schematic diagram.
As shown in Fig. 2, being cylinder profile master map, the cylinder profile (201) on the cylinder (2) is a second dervative
Catastrophe point is not present in continuous asymmetric closed curve, i.e. cylinder profile (201) each point continuous and derivable, and there is no pass through it
The center line of centre of gyration point O makes cylinder profile (201) about its axial symmetry；Cylinder profile (201) is with its centre of gyration point O
Coordinate origin, cylinder profile (201) polar equation are as follows:
In formula: R1- cylinder profile tip circle radius, mm；R3- cylinder profile bottom radius of circle, mm；T-angle parameter, rad；
The value range of n-power exponent, n are 1≤n≤3.5；
There are tri- particular points of A, B, C on the cylinder profile (201): the first point A is located at ρ (0)=R3Point；Second point
B is the farthest point away from centre of gyration point O on cylinder profile (201), and polar diameter is maximum value；As t is gradually increased from 0, thirdly C
Polar diameter ρ=R on cylinder profile (201)3+ 0.04 place；In the cylinder profile (201), it is corresponding between A, C two o'clock in
Heart angle ∠ AOC is α；C, corresponding central angle ∠ COB is γ between B two o'clock, and corresponding central angle ∠ BOA is between B, A two o'clock
3 points of β, A, B, C meet geometrical relationship: γ > β；+ β=360 ° α+γ；In the cylinder profile (201), by A point to B point gas
The polar diameter of cylinder molded line (201) increases rapidly, and reaches maximum at B point, tracing pattern by A point to the precipitous rising of B point, by B point to C
The polar diameter of point cylinder profile (201) starts to be gradually reduced, and curve gradually becomes gentle.
Increase of the cylinder profile (201) with power exponent n, the corresponding center of A, C two o'clock on cylinder profile (201)
Angle α is gradually increased, and seal line is increasingly longer, and angle corresponding to A, C two o'clock and (γ+β) are gradually reduced, corresponding to B, A two o'clock
Central angle β be gradually reduced, but still meet γ > β, the polar diameter of cylinder profile (201) by B point to A point reduction speed increasingly
Fastly, sliding-vane-type vacuum pump is accelerated therewith from beginning air-breathing to the whole process that exhaust terminates.
As shown in figure 3, being rotor main view, it is provided with radial groove (301) on the rotor (3), the number of sliding slot (301)
Amount is 6~8, and being inlaid in each sliding slot (301) can be with free-moving slide plate (1), slide plate (1) when rotor (3) rotates
The inner wall of top and cylinder (2) fits closely holding sealing.
As shown in figure 4, being upper end cover main view, air entry (401) and upper exhaust outlet (402) are opened up on upper end cover (4),
3 through-holes for fixing of alternate 120 ° of arrangements, and positioning convex platform is equipped at the edge of upper end cover (4).
As shown in figure 5, being upper end cover main view, lower air entry (501) and lower exhaust outlet (502) are opened up on lower cover (5),
3 through-holes for fixing of alternate 120 ° of arrangements, and positioning convex platform is equipped at the edge of lower cover (5).
As shown in fig. 6, being breathing process schematic diagram, sliding-vane-type vacuum pump is carrying out breathing process, working chamber volume by
It is cumulative big.
As shown in fig. 7, terminating schematic diagram for breathing process, the working chamber volume of sliding-vane-type vacuum pump reaches most at the position
Greatly, sliding-vane-type vacuum pump breathing process just terminates.
As shown in figure 8, being compression process schematic diagram, with the rotation of rotor (3), the volume of working chamber starts gradually to subtract
Small, the volume in working chamber is gradually reduced, and gas starts to be compressed, and pressure constantly increases.
As shown in figure 9, will start schematic diagram for exhaust, rotor (3) is turned at exhaust critical localisation, working chamber volume
Reach minimum, exhaust process will start.
As shown in Figure 10, be exhaust process schematic diagram, rotor (3) continues to rotate, working chamber and upper exhaust outlet (401) and under
Process is being exhausted in exhaust outlet (402) connection, sliding-vane-type vacuum pump.
It is above-mentioned although specific embodiments of the present invention are described with reference to the accompanying drawings, but it is not practical new to this
The limitation of type protection scope, those skilled in the art should understand that, based on the technical solution of the present invention, ability
Field technique personnel do not need to make the creative labor the various modifications or changes that can be made still in the protection model of the utility model
Within enclosing.
Claims (3)
1. a kind of single-chamber asymmetry sliding-vane-type vacuum pump, comprising: slide plate (1), cylinder (2), rotor (3), upper end cover (4) and lower end
It covers (5), it is characterized in that: the cylinder profile (201) on the cylinder (2) is the continuously asymmetric closing of a second dervative
Catastrophe point is not present in curve, i.e. cylinder profile (201) each point continuous and derivable, and there is no the centers by its centre of gyration point O
Line makes cylinder profile (201) about its axial symmetry；Cylinder profile (201) is using its centre of gyration point O as coordinate origin, cylinder profile
(201) polar equation are as follows:
In formula: R1- cylinder profile tip circle radius, mm；R3- cylinder profile bottom radius of circle, mm；T-angle parameter, rad；N-power
Index, the value range of n are 1≤n≤3.5；
There are tri- particular points of A, B, C on the cylinder profile (201): the first point A is located at ρ (0)=R3Point；Second point B is gas
Farthest point away from centre of gyration point O on cylinder molded line (201), polar diameter is maximum value；As t is gradually increased from 0, thirdly C is located at
Polar diameter ρ=R on cylinder profile (201)3+ 0.04 place；In the cylinder profile (201), corresponding central angle between A, C two o'clock
∠ AOC is α；C, corresponding central angle ∠ COB is γ between B two o'clock, and corresponding central angle ∠ BOA is β between B, A two o'clock, A,
B, meet geometrical relationship for 3 points of C: γ > β；+ β=360 ° α+γ；In the cylinder profile (201), by A point to B point cylinder type
The polar diameter of line (201) increases rapidly, and reaches maximum at B point, tracing pattern is by A point to the precipitous rising of B point, by B point to C point gas
The polar diameter of cylinder molded line (201) starts to be gradually reduced, and curve gradually becomes gentle.
2. a kind of single-chamber asymmetry sliding-vane-type vacuum pump as described in claim 1, it is characterized in that: the cylinder (2) with turn
Sub (3) are installed with one heart, and the gap from C to A between the cylinder profile (201) of point-to-point transmission and the outer contour of rotor (3) is gradually increased,
The polar diameter of cylinder profile (201) is by R3Increase to R3+0.04；Installation upper end cover (4) with one heart respectively of the two sides of the cylinder (2)
With lower cover (5), air entry (401) and upper exhaust outlet (402) are opened up on upper end cover (4), lower cover opens up lower air-breathing on (5)
Mouth (501) and lower exhaust outlet (502)；The lower air-breathing on upper air entry (401) and lower cover (5) on the upper end cover (4)
The projected position of mouth (501) in end face direction is completely coincident, upper exhaust outlet (402) and lower cover (5) of the upper end cover (4)
Projected position of the lower exhaust outlet (502) in end face direction is completely coincident；It is provided with radial groove (301) on the rotor (3), it is sliding
The quantity of slot (301) is 6~8, and being inlaid in each sliding slot (301) can be with free-moving slide plate (1), rotor (3) rotation
When slide plate (1) top and cylinder (2) inner wall fit closely holding sealing.
3. a kind of single-chamber asymmetry sliding-vane-type vacuum pump as described in claim 1, it is characterized in that: upper air entry (401), lower suction
The position of port (501) is located at the lucky end of life of sliding-vane-type vacuum pump breathing process, and working chamber volume just reaches maximum value；Root
According to the interior volume specific ratio of sliding-vane-type vacuum pump, so that working chamber and upper exhaust outlet (402) and lower exhaust outlet (502) are detached from wink when exhaust
When volumetric values it is minimum, so that it is determined that the position of upper exhaust outlet (402) and lower exhaust outlet (502).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820791395.5U CN208252344U (en) | 2018-05-25 | 2018-05-25 | A kind of single-chamber asymmetry sliding-vane-type vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820791395.5U CN208252344U (en) | 2018-05-25 | 2018-05-25 | A kind of single-chamber asymmetry sliding-vane-type vacuum pump |
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| Publication Number | Publication Date |
|---|---|
| CN208252344U true CN208252344U (en) | 2018-12-18 |
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ID=64652390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820791395.5U Withdrawn - After Issue CN208252344U (en) | 2018-05-25 | 2018-05-25 | A kind of single-chamber asymmetry sliding-vane-type vacuum pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN208252344U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591057A (en) * | 2018-05-25 | 2018-09-28 | 中国石油大学(华东) | A kind of single-chamber asymmetry sliding-vane-type vacuum pump |
-
2018
- 2018-05-25 CN CN201820791395.5U patent/CN208252344U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591057A (en) * | 2018-05-25 | 2018-09-28 | 中国石油大学(华东) | A kind of single-chamber asymmetry sliding-vane-type vacuum pump |
| CN108591057B (en) * | 2018-05-25 | 2023-09-15 | 中国石油大学(华东) | Single-cavity asymmetric sliding vane vacuum pump |
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20181218 Effective date of abandoning: 20230915 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20181218 Effective date of abandoning: 20230915 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |