CN104421150B - Spiral rotor and method for generating tooth profile thereof - Google Patents
Spiral rotor and method for generating tooth profile thereof Download PDFInfo
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- CN104421150B CN104421150B CN201310468740.3A CN201310468740A CN104421150B CN 104421150 B CN104421150 B CN 104421150B CN 201310468740 A CN201310468740 A CN 201310468740A CN 104421150 B CN104421150 B CN 104421150B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000015572 biosynthetic process Effects 0.000 claims description 88
- 230000021615 conjugation Effects 0.000 claims description 2
- 239000011295 pitch Substances 0.000 description 49
- 239000012530 fluid Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
-
- 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
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
-
- 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
- F04C2250/00—Geometry
- F04C2250/20—Geometry of the rotor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Rotary Pumps (AREA)
Abstract
The invention discloses a spiral rotor and a tooth profile generating method thereof, wherein the tooth profile is set relative to a top circle, a pitch circle and a bottom circle, and the spiral rotor comprises a first curve, a second curve and a third curve. The second curve is connected to the first curve by a bottom circle, and the second curve is formed by a point of a top circle in a cycloidal manner. The third curve is connected to the first curve and the second curve by the pitch circle and is used for generating the first curve in a conjugate and mirror reflection mode, the third curve is formed on one cylindrical end face and is connected with the pitch circle and the bottom circle, the cylinder is generated by the top circle, a spiral groove is formed on the cylindrical surface and is connected with the cylindrical end face, and the depth of the spiral groove is the difference between the radius of the top circle and the radius of the pitch circle.
Description
Technical field
The present invention relates to a kind of rotor and its creation method of tooth form, the spiral shell that vacuum helps pump is useful in more particularly to a kind of
The creation method of gyrator and its tooth form.
Background technology
In general, vacuum helps the rotor for being internally provided with two corresponding engagements of pump board, by the relative of two rotors
Rotate and fluid is sucked from the side of rotor, then the fluid is sent out by the opposite side of rotor.Therefore, positioned at described in rotor
The fluid of side just can be extracted out from the side, and reach effect of vacuum.
However, by the tooth form that above-mentioned helical rotor is formed is required when the design phase reality processing is not considered
The use parameter of cutter, therefore when above-mentioned helical rotor is in reality processing, often increase helical rotor not because processing is difficult
Yield, even resulting in cutter cannot meet designed tooth form and need to readjust original tooth Shape Design, and then elongate production
Time-histories and be unfavorable for board manufacture.
The content of the invention
Therefore, the present invention provides a kind of creation method of the helical rotor and its tooth form for being useful in vacuum side pump board, with
Solve the above problems.
The present invention discloses a kind of helical rotor, and its tooth form is that setting is justified relative to a tip circle, a pitch circle and a bottom, described
Helical rotor includes one first curve, one second curve and one the 3rd curve.Second curve justifies company using the bottom
First curve, and second curve are connected to by a little being formed in the way of cycloid on the tip circle.Described 3rd
Curve is utilized respectively the pitch circle and is connected to first curve and is connected to second curve using the tip circle, described
3rd curve is used for producing first curve, the 3rd curve to be formed in the one of a cylinder in the way of conjugation and mirror
On end face and connect the pitch circle and justify with the bottom, wherein the cylinder is generated using the tip circle, a helical groove sets
The end face of the cylinder is put on the surface of the cylinder and is connected to, and the depth of the helical groove is the tip circle
The difference of radius and the pitch radius.
The present invention further discloses the formation curve of the first curve negotiating one and is produced in the way of being conjugated, and the described 3rd is bent
Line is produced by way of the formation curve is with mirror, wherein the formation curve is formed on the end face of the cylinder
And connect the pitch circle and the tip circle.
The present invention further discloses the formation curve and is same as the 3rd curve, and the formation curve and described the
Three curves differ 180 degree.
The width that the present invention further discloses the helical groove is the half and of a helical pitch of the helical rotor
The difference of specific width.
The present invention further discloses the side Bi Weiyi inclined-planes of the helical groove, and the side on the inclined-plane is formed with company
It is connected to one first globoidal structure of the periphery, and the opposite side on the inclined-plane is formed with and is connected to the helical groove
One second globoidal structure of bottom surface.
The present invention further discloses the 3rd curve and includes an inner arc curve, one first in arc and one second
Arc.The inner arc curve correspondence inclined-plane.First side arc correspondence first globoidal structure, first side arc is used for
Connect the inner arc curve and the pitch circle.Second side arc correspondence second globoidal structure, second side arc is used for
Connect the inner arc curve and the tip circle.
The present invention further discloses a kind of method of tooth profile of screw rotor of creating, and it includes according to predetermined space and suction
One tip circle of the discharge capacity setting correspondence helical rotor, a pitch circle, a bottom are justified and a helical pitch；Justified using tip circle generation one
Post；A helical groove is formed on the surface of the cylinder；The helical groove is connected in the end face of the cylinder；Institute
State and the formation curve that the connection pitch circle is justified with the bottom is captured on end face；Given birth in the way of being conjugated using the formation curve
Into one first curve；One second curve is a little formed in the way of cycloid using on the tip circle；Using the formation curve
One the 3rd curve that 180 degree are differed with the 3rd curve is generated in the way of mirror；And it is utilized respectively the bottom circle
Connect first curve and second curve and the 3rd curve and described are connected with second curve, the tip circle
Pitch circle connects the 3rd curve and first curve.
The further open helical groove that sets of the invention includes the setting helical form on the surface of the cylinder
The depth of groove is the difference of the tip circle radius and the pitch radius；And it is described to set the pitch of the helical groove
Helical pitch.
It is described that further one helical groove of open setting of the invention further includes setting on the surface of the cylinder
The width of helical groove is the difference of the half with a specific width of the helical pitch.
Surface one helical groove of formation that the present invention is further disclosed in the cylinder includes recessed in the helical form
The side wall of groove forms an inclined-plane；One first globoidal structure for being connected to the periphery is formed in the side on the inclined-plane；
And the opposite side on the inclined-plane forms one second globoidal structure for being connected to the helical groove bottom surface.
Further disclosure of the invention generates one first curve in the way of being conjugated and includes institute using the formation curve
The rotor that formation curve is stated relative to the corresponding engagement of the helical rotor rotates a special angle；Complete the formation curve
After the special angle being rotated relative to the rotor of the corresponding engagement of the helical rotor, then by the formation curve with respect to institute
State helical rotor and rotate the special angle；Complete for the formation curve to rotate the special angle relative to the helical rotor
Afterwards, the envelope corresponding to the formation curve is produced；And envelope Jie is captured corresponding to the helical rotor
Curve between one pitch circle of the rotor of engagement and bottom circle.
Further disclosure of the invention is generated one the 3rd curve in the way of mirror and included institute using the formation curve
State the horizontal mirror of formation curve；And after completing the horizontal mirror of the formation curve, then by the vertical mirror of the formation curve.
Further disclosure of the invention is generated one the 3rd curve in the way of mirror and included institute using the formation curve
State the vertical mirror of formation curve；And after completing the vertical mirror of the formation curve, then by the horizontal mirror of the formation curve.
In sum, the cutter parameters used when the width design of helical groove of the invention is according to reality processing
And set, and the inclined-plane of helical groove, the first globoidal structure and the second globoidal structure contribute to cutter processing when can be more
Plus be successfully processed for side wall and corner.Therefore, helical rotor of the invention is easy to process except having the advantages that,
The problem that can more avoid cutter from being processed to designed tooth form, and then shorten production time-histories and be conducive to board to produce
Manufacture.Can be further understood by following detailed description of the invention and appended accompanying drawing on the advantages and spirit of the present invention.
Brief description of the drawings
Fig. 1 is the element schematic that embodiment of the present invention vacuum helps pump board.
Fig. 2 is the generalized section of the tooth form of the helical rotor of the embodiment of the present invention first.
Fig. 3 is the element schematic of the helical rotor of the embodiment of the present invention first.
Fig. 4 is the flow chart of the method for the tooth form of the present invention the first helical rotor of creation.
Fig. 5 is the schematic diagram of embodiment of the present invention tip circle, pitch circle and bottom circle.
Fig. 6 is the element schematic of embodiment of the present invention cylinder.
Fig. 7 is the generalized section of the tooth form of embodiment of the present invention formation curve and the first helical rotor.
Fig. 8 is the flow chart that the embodiment of the present invention forms helical groove.
Fig. 9 is the generalized section of cylinder shown in Fig. 6.
Figure 10 is the flow chart that the embodiment of the present invention generates the first curve using formation curve in the way of being conjugated.
Figure 11 to Figure 14 is respectively the decomposing schematic representation that formation curve generates the first curve in the way of being conjugated.
Wherein, description of reference numerals is as follows：
3 vacuum help pump board
30 bodies
32 first helical rotors
33 second helical rotors
34 first curves
36 second curves
38 the 3rd curves
40 cylinders
381 inner arc curves
383 first side arcs
385 second side arcs
401 helical grooves
403 end faces
405 formation curves
407 inclined-planes
4070 first globoidal structures
4072 second globoidal structures
T tip circles
P pitch circles
Justify at R bottoms
A areas
D helical pitches
E envelopes
C1 centers
C2 specified points
RS, PS, TS circular arc
Tr, Pr radius
X specific widths
θ special angles
Step 100~118,200~212,300~308
Specific embodiment
Fig. 1 is referred to, Fig. 1 is the element schematic that embodiment of the present invention vacuum helps pump board 3.As shown in figure 1, vacuum is helped
Pump board 3 includes a body 30 and one first helical rotor 32 and one second helical rotor 33.First helical rotor 32
And second helical rotor 33 be installed in body 30, and the tooth form of the first helical rotor 32 is identical and corresponding to the second spiral
The tooth form of rotor 33.Therefore, the first helical rotor 32 is just engageable to the second helical rotor 33, when the first helical rotor 32 and
When second helical rotor 33 is relatively rotated, fluid just can be inhaled from the side of the first helical rotor 32 and the second helical rotor 33
Enter, then the fluid is sent out by the opposite side of the first helical rotor 32 and the second helical rotor 33, use and reach vacuum
Effect.The tooth form of the second helical rotor 33 is same as due to the tooth form of the first helical rotor 32, for the sake of clarity, below only for
The structure design of the tooth form of one helical rotor 32 is illustrated.
Fig. 2 is referred to, Fig. 2 is the generalized section of the tooth form of the first helical rotor of the embodiment of the present invention 32.Such as Fig. 2 institutes
Show, the first helical rotor 32 can help the predetermined space of pump board 3 to set it with the center between the second helical rotor 33 according to vacuum
Away from a tip circle T, the pitch circle P and a bottom for using setting the first helical rotor 32 of correspondence justify R.As shown in Fig. 2 tip circle T, section
Circle P and bottom circle R be arranged concentrically, the diameter with diameter greater than pitch circle P of tip circle T, and pitch circle P with diameter greater than bottom circle R it is straight
Footpath.In other words, tip circle T, pitch circle P and bottom justify R on same concentric circles, and according to tip circle T, section on the concentric circles
The order that R is justified at circle P and bottom is arranged from large to small.
From the above, the tooth form of tip circle T and the first helical rotor 32 can be around going out an area A（Illustrated with oblique line in Fig. 2
Person）.Fig. 3 is referred to, Fig. 3 is the element schematic of the first helical rotor of the embodiment of the present invention 32.As shown in figure 3, the first spiral
Rotor 32 has a helical pitch D, and it is single helical rotor with the product of area A（That is the first helical rotor 32）Pump machine is helped to vacuum
Contribution produced by the suction amount of platform 3.In general, vacuum side pump board 3 is with two helical rotors, in other words, helical pitch D
Can be used to define the suction amount that vacuum helps pump board 3 with the product of area A.In sum, pump machine is actually helped according to vacuum
The predetermined space and suction amount of platform 3 can set tip circle T, pitch circle P, bottom circle R and the helical pitch of the first helical rotor 32 of correspondence
D。
As shown in Fig. 2 the tooth form of the first helical rotor 32 includes one first curve 34, one second curve 36 and one
Three curves 38.Second curve 36 is connected to the first curve 34 using the circular arc R S that R is justified at bottom.3rd curve 38 is utilized respectively pitch circle
The one circular arc PS of P is connected to the first curve 34 and is connected to the second curve 36 using the circular arc TS of tip circle T.Additionally, the 3rd
Curve 38 includes an inner arc curve 381, one first arc 385 at arc 383 and one second.First side arc 383 is used for connecting
The circular arc PS of inner arc curve 381 and pitch circle P, and the second side arc 385 is used for connecting the circular arc TS of inner arc curve 381 and tip circle T.
Fig. 4 is referred to, Fig. 4 is the flow chart of the method for the present invention creation tooth form of the first helical rotor 32.Fig. 4 is comprising following
Step：
Step 100：According to predetermined space and tip circle T, pitch circle P, the bottom of suction amount setting the first helical rotor 32 of correspondence
Circle R and helical pitch D, wherein Fig. 5 are the schematic diagram that R is justified at embodiment of the present invention tip circle T, pitch circle P and bottom.
Step 102：A cylinder 40 is generated using tip circle T, wherein Fig. 6 illustrates for the element of embodiment of the present invention cylinder 40
Figure.
Step 104：A helical groove 401 is formed on the surface of cylinder 40.
Step 106：Connection helical groove 401 is in the end face 403 of cylinder 40.
Step 108：The formation curve 405 that connection pitch circle P justifies R the bottom of with is captured on end face 403.
Step 110：Using formation curve 405 the first curve 34 is generated in the way of being conjugated.
Step 112：The second curve 36 is a little formed in the way of cycloid using on tip circle T.
Step 114：Generated in the way of mirror using formation curve 405 and differ 180 degree with formation curve 405
3rd curve 38.
Step 116：Be utilized respectively bottom circle R connect the first curve 34 be connected with the second curve 36, tip circle T the second curve 36 and
3rd curve 38 and pitch circle P connection the 3rd curve 38 and the first curve 34.
Step 118：Terminate.
Illustrated for above-mentioned steps herein.First, as shown in Fig. 2, Fig. 3 and Fig. 5, pump board 3 is helped according to vacuum
Predetermined space and the suction amount setting correspondence tip circle T of the first helical rotor 32, pitch circle P, bottom circle R and helical pitch D（Step
100）.Then, cylinder 40 as shown in Figure 6 is generated using tip circle T（Step 102）.Helical groove is formed on the surface of cylinder 40
401（Step 104）, and helical groove 401 is connected to the end face 403 of cylinder 40（Step 106）.So, in cylinder
Just fechtable connects the formation curve 405 that pitch circle P justifies R the bottom of with to 40 end face 403（Step 108）, in other words, formation curve
405 are formed on the end face 403 of cylinder 40 and connect pitch circle P and tip circle T.
Fig. 7 is referred to, Fig. 7 shows for the section of the tooth form of 405 and first helical rotor of embodiment of the present invention formation curve 32
It is intended to.As shown in fig. 7, after the drafting of completion formation curve 405, formation curve 405 is refigured in the first helical rotor 32
Tooth form side.Then, the first curve 34 is generated in the way of being conjugated using formation curve 405（Step 110）.Additionally, sharp
The second curve 36 is a little formed in the way of cycloid with tip circle T（Step 112）.Finally, using formation curve 405 with mirror
Mode generate the 3rd curve 38 that 180 degree are differed with formation curve 405（Step 114）.
To first be generated it is noted that generating the 3rd curve 38 in the way of mirror using formation curve 405 and including
After the horizontal mirror of curve 405, then by the vertical mirror of formation curve 405 generating the 3rd curve 38.But using formation curve 405 with
The order that the mode of mirror generates the 3rd curve 38 is not limited with above-mentioned.For example, also can first by the perpendicular mirrors of formation curve 405
After penetrating, then by the horizontal mirror of formation curve 405 generating the 3rd curve 38.From the foregoing, the 3rd curve 38 is bent by generating
Line 405 is respectively through produced by horizontal mirror and vertical mirror, therefore the 3rd curve 38 is same as formation curve 405, and the 3rd
Curve 38 differs 180 degree with formation curve 405.That is, the 3rd curve 38 can also be rotated by formation curve 405
180 degree and obtain.
In sum, formation curve 405 to be produced by way of being conjugated, the 3rd curve 38 is by generation for the first curve 34
Curve 405 is produced in the way of mirror, and the 3rd curve 38 is same as formation curve 405.In other words, actually, also may be used
After formation curve 405 is produced in the way of mirror using the 3rd curve 38, the life generated by the mirror of the 3rd curve 38 is recycled
Into curve 405 the first curve 34 is produced in the way of being conjugated.That is, the 3rd curve 38 can be used to be conjugated and mirror
Mode produces the first curve 34.
After the drafting for completing the first curve 34, the second curve 36 and the 3rd curve 38, then it is utilized respectively the circle that R is justified at bottom
Arc RS connects the first curve 34 and the second curve 36 and the 3rd curve 38 and section is connected with the circular arc TS of the second curve 36, tip circle T
Circular arc PS connection the 3rd curve 38 and first curve 34 of circle P.Thereby, by above-mentioned circular arc R S, TS, PS, the first curve 34,
The closed curve that two curves 36 and the 3rd curve 38 are constituted is the section of the tooth form of the first helical rotor 32.
Below for the forming step of helical groove 401（Step 104）It is described in detail.Fig. 8 is referred to, Fig. 8 is
The embodiment of the present invention forms the flow chart of helical groove 401, and Fig. 8 is comprised the steps of：
Step 200：The depth for setting helical groove 401 is the difference of the radius Pr of the radius Tr and pitch circle P of tip circle T.
Step 202：The pitch for setting the helical groove 401 is helical pitch D.
Step 204：The width for setting helical groove 401 is the half of helical pitch D and the difference of a specific width X.Step
206：An inclined-plane 407 is formed in the side wall of helical groove 401.
Step 208：One first globoidal structure 4070 for being connected to the surface of cylinder 40 is formed in the side on inclined-plane 407.Step
210：Opposite side on inclined-plane 407 forms one second globoidal structure 4072 for being connected to the bottom surface of helical groove 401.
Step 212：Terminate.
Also referring to Fig. 9, Fig. 9 is the generalized section of cylinder 40 shown in Fig. 6.As shown in Figures 6 to 9, first, set
The depth of helical groove 401 is the difference of the radius Pr of the radius Tr and pitch circle P of tip circle T（Step 200）, set helical form
The pitch of groove 401 is helical pitch D（Step 202）, and set the width of helical groove 401 as helical pitch D half with it is specific
The difference of width X（Step 204）.In this embodiment, specific width X is a quarter of helical pitch D, but is not limited.In reality
On, specific width X required when being according to reality processing cutter and set.After completing above-mentioned setting, the mode using cutting exists
The surface of cylinder 40 forms helical groove 401.Stated differently, since helical rotor of the invention adds actual in design
Cutter parameters needed for man-hour are taken into account, therefore helical rotor of the invention has the advantages that easy to process, and can avoid knife
The problem that tool cannot be processed to designed tooth form.
Further, to enable helical rotor of the invention to be more beneficial for processing, it is as follows to be that helical groove 401 is imported
Design.First, the side wall in helical groove 401 forms inclined-plane 407（Step 206）.Then, then in the side on inclined-plane 407
Formation is connected to the surface of cylinder 40（That is tip circle T）The first globoidal structure 4070（Step 208）And in the opposite side on inclined-plane 407
Formation is connected to the second globoidal structure 4072 of the bottom surface of helical groove 401（Step 210）.Above-mentioned design can make cutter in processing
When more successfully can be processed for side wall and corner.
After completing above-mentioned steps, then helical groove 401 is connected to the end face 403 of cylinder 40, used on end face 403
Produce formation curve 405（As shown in Figure 6）.It is noted that when helical groove 401 is connected to the end face 403 of cylinder 40
When, inclined-plane 407, the first globoidal structure 4070 and the second globoidal structure 4072 form the 3rd curve 38 respectively（That is formation curve
405）Inner arc curve 381, first at arc 383 and second arc 385.In other words, the inclined-plane 407 of helical groove 401,
First globoidal structure 4070 and the second globoidal structure 4072 correspond to inner arc curve 381, the first side arc of the 3rd curve 38 respectively
383 and the second side arc 385.
The step of below for the first curve 34 are generated in the way of being conjugated using formation curve 405（Step 110）Carry out
Describe in detail.Figure 10 is referred to, Figure 10 is that the embodiment of the present invention generates the first curve using formation curve 405 in the way of being conjugated
34 flow chart.Figure 10 is comprised the steps of：
Step 300：Center C1 by formation curve 405 relative to the first helical rotor 32 rotates a special angle.
Step 302：After completing for formation curve 405 to rotate a special angle θ relative to the center C1 of the first helical rotor 32,
The specified point C2 by formation curve 405 relative to the second helical rotor 33 rotates special angle θ again.
Step 304：Complete by formation curve 405 after the specified point C2 rotation special angles θ of the second helical rotor 33,
Produce the envelope E corresponding to formation curve 405.
Step 306：Capture the curve that envelope E justifies between R between the pitch circle P of the first helical rotor 32 and bottom.
Step 308：Terminate.
Also referring to Figure 11 to Figure 14, Figure 11 to Figure 14 is respectively formation curve 405 and generates first in the way of being conjugated
The decomposing schematic representation of curve 34.As shown in FIG. 10 to 14, by formation curve as shown in figure 11 405 with respect to the first helical rotor 32
Center C1 rotations special angle θ to Figure 12 shown in position（Step 300）, then by formation curve 405 with respect to the second helical rotor
33 specified point C2 rotation special angles θ（Step 302）, make position shown in the Figure 13 of formation curve 405.Repeat the above steps, make
Formation curve 405 produces envelope E as shown in figure 14（Step 304）.Then, envelope E is captured between the first helical rotor 32
Pitch circle P and bottom circle R between curve, the curve is the first curve 34.
Compared to prior art, the knife that the width design of helical groove of the invention is used when being according to reality processing
Have parameter and set, and the inclined-plane of helical groove, the first globoidal structure and the second globoidal structure contribute to cutter in processing
When more successfully can be processed for side wall and corner.Therefore, helical rotor of the invention is easy to process except having
Advantage, the problem that can more avoid cutter from being processed to designed tooth form, so shorten production time-histories and be conducive to
Board is manufactured.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (12)
1. a kind of helical rotor, its tooth form is that setting is justified relative to a tip circle, a pitch circle and a bottom, it is characterised in that described
Helical rotor includes：
One first curve；
One second curve, it is connected to first curve using bottom circle, second curve by the tip circle a bit
Formed in the way of cycloid；And
One the 3rd curve, it is utilized respectively the pitch circle and is connected to first curve and is connected to using the tip circle described
Second curve, the 3rd curve is used for producing first curve, the 3rd shaped form in the way of conjugation and mirror
On the end face of Cheng Yi cylinders and connect the pitch circle and the tip circle, wherein the cylinder is generated using the tip circle,
One helical groove is arranged on the surface of the cylinder and is connected to the end face of the cylinder, and the helical groove
Depth is the difference of the tip circle radius and the pitch radius, and a generation curve is formed on the end face of the cylinder and connected
The pitch circle and the tip circle are connect, the formation curve is same as the 3rd curve, and the formation curve and the described 3rd
Curve differs 180 degree.
2. helical rotor as claimed in claim 1, it is characterised in that the formation curve of the first curve negotiating one is being conjugated
Mode is produced, and formation curve described in the 3rd curve negotiating is produced in the way of mirror.
3. helical rotor as claimed in claim 1, it is characterised in that the width of the helical groove is the helical rotor
A helical pitch half and a specific width difference.
4. helical rotor as claimed in claim 1, it is characterised in that the side Bi Weiyi inclined-planes of the helical groove, institute
The side for stating inclined-plane is formed with one first globoidal structure on the surface for being connected to the cylinder, and the opposite side on the inclined-plane is formed
There is one second globoidal structure of the bottom surface for being connected to the helical groove.
5. helical rotor as claimed in claim 4, it is characterised in that the 3rd curve includes：
One inner arc curve, its described inclined-plane of correspondence；
One first side arc, its described first globoidal structure of correspondence, first side arc be used for connecting the inner arc curve with it is described
Pitch circle；And
One second side arc, its described second globoidal structure of correspondence, second side arc be used for connecting the inner arc curve with it is described
Tip circle.
6. a kind of creation method of tooth profile of screw rotor, it is characterised in that methods described includes：
Led according to a tip circle of predetermined space and the suction amount setting correspondence helical rotor, a pitch circle, bottom circle and one
Journey；
A cylinder is generated using the tip circle；
A helical groove is formed on the surface of the cylinder；
The helical groove is connected to the end face of the cylinder；
A formation curve of the connection pitch circle and the tip circle is captured on the end surface；
One first curve is generated in the way of being conjugated using the formation curve；
One second curve is a little formed in the way of cycloid using the tip circle；
One the 3rd curve that 180 degree are differed with the formation curve is generated in the way of mirror using the formation curve；
And
Be utilized respectively bottom circle connection first curve be connected with second curve, the tip circle second curve and
3rd curve and the pitch circle connect the 3rd curve and first curve.
7. method as claimed in claim 6, it is characterised in that form the helical groove on the surface of the cylinder and include：
The depth for setting the helical groove is the tip circle radius and the difference of the pitch radius；And
The pitch for setting the helical groove is the helical pitch.
8. method as claimed in claim 7, it is characterised in that form the helical groove on the surface of the cylinder and further wrap
Contain：
The width for setting the helical groove is the half of the helical pitch and the difference of a specific width.
9. method as claimed in claim 6, it is characterised in that form the helical groove on the surface of the cylinder and include：
An inclined-plane is formed in the side wall of the helical groove；
One first globoidal structure for being connected to the periphery is formed in the side on the inclined-plane；And
Opposite side on the inclined-plane forms one second globoidal structure for being connected to the helical groove bottom surface.
10. method as claimed in claim 6, it is characterised in that described first is generated in the way of being conjugated using the formation curve
Curve includes：
The formation curve is rotated into a special angle relative to the rotor engaged corresponding to the helical rotor；
After completing for the formation curve to rotate the special angle relative to the rotor engaged corresponding to the helical rotor,
The formation curve is rotated into the special angle relative to the helical rotor again；
After completing for the formation curve to rotate the special angle relative to the helical rotor, produce the formation curve institute right
The envelope answered；And
Capture song of the envelope between a pitch circle of the rotor engaged corresponding to the helical rotor and bottom circle
Line.
11. methods as claimed in claim 6, it is characterised in that the described 3rd is generated in the way of mirror using the formation curve
Curve includes：
By the horizontal mirror of the formation curve；And
After completing the horizontal mirror of the formation curve, then by the vertical mirror of the formation curve.
12. methods as claimed in claim 6, it is characterised in that the described 3rd is generated in the way of mirror using the formation curve
Curve includes：
By the vertical mirror of the formation curve；And
After completing the vertical mirror of the formation curve, then by the horizontal mirror of the formation curve.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW102132303 | 2013-09-06 | ||
| TW102132303A TWI539078B (en) | 2013-09-06 | 2013-09-06 | Helix rotor and method for generating tooth thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104421150A CN104421150A (en) | 2015-03-18 |
| CN104421150B true CN104421150B (en) | 2017-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310468740.3A Active CN104421150B (en) | 2013-09-06 | 2013-10-09 | Spiral rotor and method for generating tooth profile thereof |
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| Country | Link |
|---|---|
| CN (1) | CN104421150B (en) |
| TW (1) | TWI539078B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0591979B1 (en) * | 1992-10-09 | 1997-05-21 | Mayekawa Mfg Co.Ltd. | Screw rotor tooth profile |
| CN1299928A (en) * | 2001-01-21 | 2001-06-20 | 华南理工大学 | Screw bolt with new type of profile |
| CN101397913A (en) * | 2007-09-28 | 2009-04-01 | 远骑科技股份有限公司 | Spiral rotor and tooth profile formation method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRPI0612907A2 (en) * | 2005-07-18 | 2010-12-07 | Syngenta Participations Ag | microbiocidal compounds, composition containing them and method of controlling or preventing plant infestation |
| TWI308616B (en) * | 2006-08-11 | 2009-04-11 | Fu Sheng Ind Co Ltd | Screw fluid machines |
-
2013
- 2013-09-06 TW TW102132303A patent/TWI539078B/en active
- 2013-10-09 CN CN201310468740.3A patent/CN104421150B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0591979B1 (en) * | 1992-10-09 | 1997-05-21 | Mayekawa Mfg Co.Ltd. | Screw rotor tooth profile |
| CN1299928A (en) * | 2001-01-21 | 2001-06-20 | 华南理工大学 | Screw bolt with new type of profile |
| CN101397913A (en) * | 2007-09-28 | 2009-04-01 | 远骑科技股份有限公司 | Spiral rotor and tooth profile formation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104421150A (en) | 2015-03-18 |
| TWI539078B (en) | 2016-06-21 |
| TW201510361A (en) | 2015-03-16 |
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