CN208816319U - A kind of double end of twin-screw liquid pump smooth screw rotor entirely - Google Patents
A kind of double end of twin-screw liquid pump smooth screw rotor entirely Download PDFInfo
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- CN208816319U CN208816319U CN201821182097.2U CN201821182097U CN208816319U CN 208816319 U CN208816319 U CN 208816319U CN 201821182097 U CN201821182097 U CN 201821182097U CN 208816319 U CN208816319 U CN 208816319U
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Abstract
The utility model discloses a kind of double end of twin-screw liquid pump smooth screw rotors entirely, the left side molded line (101) of its left screw rotor (I) includes: 4 sections of circular arcs, 4 sections of elliptic arcs, 4 sections of elliptic arc envelopes and 4 sections of involutes, the engagement system of common point and cycloid is replaced by using elliptic arc and its conjugate curves, and elliptic arc and its conjugate curves are connected with one section of involute, so that each section of line smoothing connection of profile, obtains complete smooth screw rotor.Two rotors are identical, and can be realized correct engagement, and molded line is simple, easy to manufacture.
Description
Technical field
The utility model relates to twin-screw liquid pumps, in particular to entirely smooth suitable for a kind of double end of twin-screw liquid pump
Screw rotor.
Background technique
Twin-screw liquid pump is a kind of proof positive displacement liquid pump, and sucking is separated by the active length section of two screw rotors
Chamber and discharge chamber, transmit torque by a pair of of synchromesh gear, seal chamber are made continuously to shift to outlet from suction inlet, realize liquid
Conveying.Common twin-screw liquid pump profile is made of the engagement of point gearing cycloid, and screw rotor generated is deposited
In rough seamed edge, the mechanical characteristic for thereby resulting in Ω type screw rotor is poor, and rotor is easy to happen abrasion, reduces the use of pump
Service life causes the increase of leakage rate, so that the sealing performance of destruction work chamber, reduces the working performance of Quimby pump.
In the Design and manufacturing process of screw pump, the design of screw rotor end face molded line has larger impact to the performance of pump.
For the performance for improving common twin-screw rotor, Chinese patent (patent No. CN201720524780.9) proposes a kind of complete smooth
Quimby pump rotor, which replaces common point gearing cycloid using two sections of circular arcs and its envelope, alleviates at cusp
Wear problem, realize and constitute being smoothly connected and be properly engaged with completely between curve that there is good sealing performance, wear-resisting
The advantages that performance is high, mechanical characteristic is good；But this in the molded line of twin-screw section there are the variation of curvature convex-concave, it is steady to the operation of pump
Qualitative to there is certain influence, capacity utilization decreases.
Utility model content
The utility model to solve the above-mentioned problems, while in order to enrich twin-screw liquid pump screw rotor end face molded line class
Type proposes the double end of twin-screw liquid pump a kind of smooth screw rotor and its design method entirely.The utility model is using oval
Arc and its conjugate curves replace the engagement system of common point and cycloid, and are conjugated song with it with one section of involute connection elliptic arc
Line is smoothly connected so that realizing between each curved section in profile, and then obtains complete smooth screw rotor.The course of work
In, screw rotor end face molded line can be realized correct engagement in the case where synchronizing incorgruous dual AC power movement, the engagement between profile
Line engagement is become from original point gearing, and then the engagement between screw rotor becomes face from original line engagement and engages；It improves
The sealing performance of screw rotor, reduces the abrasion between rotor, improves the service life of screw rotor；And molded line is simple,
It is easy to manufacture, reduce production cost；To the type and its work of raising of abundant twin-screw liquid pump screw rotor end face molded line
It is of great significance as performance.
To achieve the goals above, the utility model adopts the following technical solution:
A kind of double end of twin-screw liquid pump smooth screw rotor, including left screw rotor (I) and right screw rotor entirely
(Ⅱ)；The left side molded line (101) of left screw rotor (I) includes: 4 sections of circular arcs, 4 sections of elliptic arcs, 4 sections of elliptic arc envelopes and 4
Section involute, counterclockwise successively are as follows: left tooth root circular arc UAB, the first tooth top elliptic arc envelope BC of a left side, a left side first are gradually opened
Line CD, the first tooth top elliptic arc DE of a left side, left addendum circle arc EFG, the first tooth top elliptic arc GH of the right side, the first involute HI of the right side, right the
One tooth top elliptic arc envelope IJ, right tooth root circular arc JKL, the second tooth top elliptic arc envelope LM of the right side, the right side the second involute MN, the right side
Second tooth top elliptic arc NP, left addendum circle arc PQR, the second tooth top elliptic arc RS of a left side, the second involute ST of a left side, left second tooth top are ellipse
Arc envelope line TU；The left side molded line (101) be it is complete smooth, be smoothly connected between adjacent curve, there is no not
Smooth tie point；The left side molded line (101) is symmetrical about x-axis and y-axis simultaneously；The left screw rotor (I)
Left side molded line (101) is identical with right side molded line (102) of right screw rotor (II).
A kind of double end of twin-screw liquid pump smooth screw rotor entirely, the left side type of left screw rotor (I)
Line (101) can be realized correct engagement in synchronous incorgruous dual AC power movement with right screw rotor (II) right side molded line (102)；
Left tooth root circular arc UAB, the first tooth top elliptic arc envelope BC of a left side, the first involute CD of a left side in left side molded line (101), left the
One tooth top elliptic arc DE, left addendum circle arc EFG, the first tooth top elliptic arc GH of the right side, the first involute HI of the right side, right first tooth top are oval
Arc envelope IJ, right tooth root circular arc JKL, the second tooth top elliptic arc envelope LM of the right side, the second involute MN of the right side, right second tooth top are ellipse
Circular arc NP, left addendum circle arc PQR, the second tooth top elliptic arc RS of a left side, the second involute ST of a left side, left second tooth top elliptic arc envelope
TU respectively with left addendum circle arc pqr, the second tooth top elliptic arc np of the right side, the right side the second involute mn, the right side in right side molded line (102)
Second tooth top elliptic arc envelope lm, right tooth root circular arc jkl, the first tooth top elliptic arc envelope ij of the right side, the first involute hi of the right side,
The first tooth top elliptic arc gh of the right side, left addendum circle arc efg, the first tooth top elliptic arc de of a left side, the first involute cd of a left side, left first tooth top
Elliptic arc envelope bc, left tooth root circular arc uab, the second tooth top elliptic arc envelope tu of a left side, the second involute st of a left side, left second tooth
Push up elliptic arc rs correct engagement.
A kind of double end of twin-screw liquid pump smooth screw rotor entirely, the left side type of left screw rotor (I)
The equation of line (101) is:
1. the equation of the first tooth top elliptic arc DE of a left side are as follows: rDE(t)=MDE·r4(t)
In formula: MDEFor the first rotational transformation matrix, r4 (t) is tooth top elliptic arc (4), as follows:
The equation of the first tooth top elliptic arc envelope BC of a left side are as follows: rBC(t)=MBC·r5(t)
In formula: MBCFor the second rotational transformation matrix, r5(t) tooth top elliptic arc envelope (5), as follows:
More than: m1The major semiaxis of-tooth top elliptic arc (4)；n1The semi-minor axis of-tooth top elliptic arc (4)；- it is first
Intermediate variable is determined by following equation:
The equation of the first involute CD of a left side are as follows: rCD(t)=MCD·r6(t)
In formula: MCDFor third rotational transformation matrix, r6(t) it is involute (6), as follows:
More than: L-is O1The length of C,Wherein (x5 (t0), y5 (t0)) is that tooth top is ellipse
Arc envelope line (5) crosses the coordinate of the intersection point C of the tangent line L of origin with it；
t0By following equation solution:
And the angle of tangent line L and y-axis are as follows:
Wherein, α, beta, gamma are rotation angle；And(xv, yv) it is pitch circle (3) and (6) two songs of involute
The coordinate of the intersection point V of line；Rotate angle [alpha]=β+γ.
The utility model has the following beneficial effects:
1. using the engagement system of elliptic arc and the conjugate curves of elliptic arc, light between each curved section in realization profile
Slip avoids the abrasion condition of cusp, improves the mechanical characteristic of screw rotor, improves the service life of screw rotor；
It is the engagement spy of itself using its envelope 2. being smoothly connected elliptic arc and its envelope using one section of involute
Property, the design process of molded line is simplified, it is easy to process.
3. using double end smooth design entirely, dynamic balance is more preferable than conventional single-ended Quimby pump, and theoretical flow is also high
In conventional single-ended Quimby pump.
4. in the course of work, the engagement between screw rotor becomes face from original line engagement and engages；Screw rod is improved to turn
The wearability and sealing performance of son, improve the service life of screw rotor, reduce the contact line length between screw rotor, thus
Reduce leakage, improves the operational efficiency of pump；
5. enriching twin-screw liquid pump screw rotor end face molded line type.
Detailed description of the invention
The left side molded lines of the left screw rotor of double end of twin-screw liquid pump of the Fig. 1 to be proposed.
The generating process figure of the left side molded line of the left screw rotor of double end of twin-screw liquid pump of the Fig. 2 to be proposed.
Fig. 3 is that 2 complete smooth profiles engage figure.
Fig. 4 is the engagement figure of 2 complete smooth twin-screw liquid pump screw rotors.
In figure: R2- it is pitch radius；R1- it is radius of addendum；R3- it is root radius；m1- tooth top elliptic arc
(4) major semiaxis；n1The semi-minor axis of-tooth top elliptic arc (4)；101-left side molded line；102-right side molded line；I-left spiral shell
Bar rotor；II-right screw rotor；1-root circle；2-outside circles；3-pitch circles；4-tooth top elliptic arcs；5-tooth top elliptic arcs
Envelope；6-involutes；α, beta, gamma-rotation angle.
Specific embodiment:
The utility model is described in further detail with embodiment with reference to the accompanying drawing.
As shown in Figure 1, the left side molded lines of the left screw rotor of the double end of the twin-screw liquid pump to be proposed, left screw rod
The left side molded line (101) of rotor (I) includes: 4 sections of circular arcs, 4 sections of elliptic arcs, 4 sections of elliptic arc envelopes and 4 sections of involutes, is pressed
Counterclockwise successively are as follows: left tooth root circular arc UAB, the first tooth top elliptic arc envelope BC of a left side, the first involute CD of a left side, a left side first
Tooth top elliptic arc DE, left addendum circle arc EFG, the first tooth top elliptic arc GH of the right side, the first involute HI of the right side, right first tooth top elliptic arc
Envelope IJ, right tooth root circular arc JKL, the second tooth top elliptic arc envelope LM of the right side, the second involute MN of the right side, right second tooth top are oval
Arc NP, left addendum circle arc PQR, the second tooth top elliptic arc RS of a left side, the second involute ST of a left side, left second tooth top elliptic arc envelope
TU；The left side molded line (101) is complete smooth profile, is smoothly connected between adjacent curve, there is no not only
Slip point；The left side molded line (101) is symmetrical about x-axis and y-axis simultaneously；The left end of the left screw rotor (I)
Face molded line (101) is identical with right side molded line (102) of right screw rotor (II)；
As shown in Fig. 2, the generation of the left side molded line of the left screw rotor of the double end of the twin-screw liquid pump to be proposed
Cheng Tu, steps are as follows:
1. establishing coordinate system O1Xy, O1For origin；
2. generating root circle (1), outside circle (2), pitch circle (3) by following equation, equation is as follows:
The equation of root circle (1) are as follows:
The equation of outside circle (2) are as follows:
The equation of pitch circle (3) are as follows:
More than: t-is angle parameter, rad；R1- it is radius of addendum, mm；R2- it is pitch radius, mm；R3- it is tooth
Root radius, mm；And 2R2=R1+R3；
3. generating tooth top elliptic arc (4), tooth top elliptic arc envelope (5) by following equation, equation is as follows:
The equation of tooth top elliptic arc (4) are as follows:
The equation of tooth top elliptic arc envelope (5) are as follows:
More than: m1The major semiaxis of-tooth top elliptic arc (4)；n1The semi-minor axis of-tooth top elliptic arc (4)；- it is first
Intermediate variable is determined by following equation:
4. generating involute (6) by following equation, equation is as follows:
The equation of involute (6) are as follows:
More than: L-is O1The length of C, is determined by following methods:
Wherein (x5(t0),y5(t0)) it is that tooth top elliptic arc envelope (5) is excessively former with it
The coordinate of the intersection point C of the tangent line L of point；
t0It is determined by following equation:
And obtain the angle of tangent line L and y-axis are as follows:
5. tooth top elliptic arc (4) is rotated clockwiseAngle obtains the first tooth top elliptic arc DE of a left side；By tooth top ellipse
Arc envelope (5) rotates clockwiseAngle obtains the first tooth top elliptic arc envelope BC of a left side；Involute (6) is revolved counterclockwise
TurnAngle obtains the first involute CD of a left side；
Wherein, α, beta, gamma are rotation angle；And(xv, yv) it is pitch circle (3) and (6) two songs of involute
The coordinate of the intersection point V of line；Rotate angle [alpha]=β+γ；
6. by a left side the first tooth top elliptic arc envelope BC, the first involute CD of a left side, the first tooth top elliptic arc DE of a left side
Make mirror image about y-axis, then obtained curve is made into mirror image about x-axis, and by the first tooth top elliptic arc DE of a left side and right first tooth top
Elliptic arc GH is connected with outside circle (2), by the first tooth top elliptic arc envelope BC of a left side and the second tooth top elliptic arc envelope TU of a left side
It is connected with root circle (1), by the first tooth top elliptic arc envelope IJ of the right side and right second tooth top elliptic arc envelope LM root circle
(1) it connects, the second tooth top elliptic arc NP of the right side and the second tooth top elliptic arc RS of a left side is connected with outside circle (2), obtains left side type
Line (101)；
As shown in figure 3, engaging figure, left side molded line (101) and right side molded line for 2 complete smooth profiles
(102) it can be realized correct engagement in synchronizing the movement of incorgruous dual AC power, left tooth root circular arc UAB in left side molded line (101),
The first tooth top elliptic arc envelope BC of a left side, the first involute CD of a left side, the first tooth top elliptic arc DE of a left side, left addendum circle arc EFG, right the
One tooth top elliptic arc GH, the first involute HI of the right side, the first tooth top elliptic arc envelope IJ of the right side, right tooth root circular arc JKL, right second tooth
It is ellipse to push up elliptic arc envelope LM, the second involute MN of the right side, the second tooth top elliptic arc NP of the right side, left addendum circle arc PQR, left second tooth top
Circular arc R S, the second involute ST of a left side, the second tooth top elliptic arc envelope TU of a left side respectively with the left tooth top in right side molded line (102)
Circular arc PQR, the second tooth top elliptic arc NP of the right side, the second involute MN of the right side, the right side the second tooth top elliptic arc envelope LM, right tooth root circular arc
JKL, the first tooth top elliptic arc envelope IJ of the right side, the first involute HI of the right side, the first tooth top elliptic arc GH of the right side, left addendum circle arc EFG,
The first tooth top elliptic arc DE of a left side, the first involute CD of a left side, the first tooth top elliptic arc envelope BC of a left side, left tooth root circular arc UAB, left the
Two tooth top elliptic arc envelope TU, the second involute ST of a left side, left second tooth top elliptic arc RS correct engagement.
As shown in figure 4, for the engagement figure of 2 complete smooth twin-screw liquid pump screw rotors, left screw rotor (I) and the right side
Screw rotor (II) is unfolded to generate by corresponding section molded line along the axis spiral of two screw rotors respectively, the adjacent flank of tooth
Between be completely smooth connection；When two screw rotors synchronize the movement of incorgruous dual AC power, it is able to satisfy nibbling completely for the corresponding flank of tooth
It closes, there is no the parts for interfering or having neither part nor lot in engagement.
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 double end of twin-screw liquid pump smooth screw rotor, including left screw rotor (I) and right screw rotor (II) entirely；
It is characterized in that: the left side molded line (101) of left screw rotor (I) includes: 4 sections of circular arcs, 4 sections of elliptic arcs, 4 sections of elliptic arc envelopes
With 4 sections of involutes, counterclockwise successively are as follows: left tooth root circular arc UAB, the first tooth top elliptic arc envelope BC of a left side, a left side first
Involute CD, the first tooth top elliptic arc DE of a left side, left addendum circle arc EFG, the first tooth top elliptic arc GH of the right side, the first involute HI of the right side,
The first tooth top elliptic arc envelope IJ of the right side, right tooth root circular arc JKL, the second tooth top elliptic arc envelope LM of the right side, right second involute
MN, the second tooth top elliptic arc NP of the right side, left addendum circle arc PQR, the second tooth top elliptic arc RS of a left side, the second involute ST of a left side, a left side second
Tooth top elliptic arc envelope TU；The left side molded line (101) be it is complete smooth, be smoothly connected between adjacent curve, no
There are rough tie points；The left side molded line (101) is symmetrical about x-axis and y-axis simultaneously；The left screw rotor
(I) left side molded line (101) is identical with right side molded line (102) of right screw rotor (II).
2. a kind of double end of twin-screw liquid pump as described in claim 1 smooth screw rotor entirely, it is characterized in that: left screw rod turns
The left side molded line (101) of sub (I) energy in synchronous incorgruous dual AC power movement with right screw rotor (II) right side molded line (102)
Enough realize correct engagement；Left tooth root circular arc UAB, the first tooth top elliptic arc envelope BC of a left side in left side molded line (101), left the
One involute CD, the first tooth top elliptic arc DE of a left side, left addendum circle arc EFG, the first tooth top elliptic arc GH of the right side, right first involute
HI, the first tooth top elliptic arc envelope IJ of the right side, right tooth root circular arc JKL, the second tooth top elliptic arc envelope LM of the right side, the right side second are gradually opened
Line MN, the second tooth top elliptic arc NP of the right side, left addendum circle arc PQR, the second tooth top elliptic arc RS of a left side, the second involute ST of a left side, left the
Two tooth top elliptic arc envelope TU respectively with left addendum circle arc pqr, the right second tooth top elliptic arc in right side molded line (102)
Np, the second involute mn of the right side, the second tooth top elliptic arc envelope lm of the right side, right tooth root circular arc jkl, right first tooth top elliptic arc envelope
Line ij, the first involute hi of the right side, the first tooth top elliptic arc gh of the right side, left addendum circle arc efg, the first tooth top elliptic arc de of a left side, left the
One involute cd, the first tooth top elliptic arc envelope bc of a left side, left tooth root circular arc uab, a left side the second tooth top elliptic arc envelope tu, a left side
Second involute st, left second tooth top elliptic arc rs correct engagement.
3. a kind of double end of twin-screw liquid pump as described in claim 1 smooth screw rotor entirely, left screw rotor (I)
Left side molded line (101) is characterized in:
1) equation of the first tooth top elliptic arc DE of a left side are as follows: rDE(t)=MDE·r4(t)
In formula: MDEFor the first rotational transformation matrix, r4(t) it is tooth top elliptic arc (4), as follows:
The equation of the first tooth top elliptic arc envelope BC of a left side are as follows: rBC(t)=MBC·r5(t)
In formula: MBCFor the second rotational transformation matrix, r5It (t) is tooth top elliptic arc envelope (5), as follows:
More than: m1The major semiaxis of-tooth top elliptic arc (4)；n1The semi-minor axis of-tooth top elliptic arc (4)；R1It is the half of outside circle (2)
Diameter；R2For the radius of pitch circle (3)；x4It (t) is the abscissa parametric equation of tooth top elliptic arc (4)；y4(t) it is tooth top elliptic arc (4)
Ordinate parametric equation；x5It (t) is the abscissa parametric equation of tooth top elliptic arc envelope (5)；y5It (t) is tooth top elliptic arc
The ordinate parametric equation of envelope (5)；- it is the first intermediate variable, it is determined by following equation:
The equation of the first involute CD of a left side are as follows: rCD(t)=MCD·r6(t)
In formula: MCDFor third rotational transformation matrix, r6(t) it is involute (6), as follows:
More than: x6It (t) is the abscissa parametric equation of involute (6)；y6It (t) is the ordinate parametric equation of involute (6)；L—
For tangent line O1The length of C,Wherein (x5(t0),y5(t0)) it is tooth top elliptic arc envelope (5)
The tangent line O of origin is crossed with it1The coordinate of the intersection point C of C；
t0By following equation solution:
Wherein, α is first angle, α=β+γ；β is second angle, and second angle β is pitch circle (3) and (6) two songs of involute
The intersection point V to origin O of line1Line and x-axis angle, and(xv, yv) be intersection point V coordinate；γ is
Three angles, third angle γ are tangent line O1The angle of C and y-axis:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821182097.2U CN208816319U (en) | 2018-07-25 | 2018-07-25 | A kind of double end of twin-screw liquid pump smooth screw rotor entirely |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821182097.2U CN208816319U (en) | 2018-07-25 | 2018-07-25 | A kind of double end of twin-screw liquid pump smooth screw rotor entirely |
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| CN208816319U true CN208816319U (en) | 2019-05-03 |
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| CN201821182097.2U Withdrawn - After Issue CN208816319U (en) | 2018-07-25 | 2018-07-25 | A kind of double end of twin-screw liquid pump smooth screw rotor entirely |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757439A (en) * | 2018-07-25 | 2018-11-06 | 中国石油大学(华东) | A kind of double end of twin-screw liquid pump smooth screw rotor and its design method entirely |
-
2018
- 2018-07-25 CN CN201821182097.2U patent/CN208816319U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757439A (en) * | 2018-07-25 | 2018-11-06 | 中国石油大学(华东) | A kind of double end of twin-screw liquid pump smooth screw rotor and its design method entirely |
| CN108757439B (en) * | 2018-07-25 | 2023-08-18 | 中国石油大学(华东) | Double-head full-smooth screw rotor of double-screw liquid pump and design method thereof |
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