CN106050643B - A kind of five screw rods for refining shaping - Google Patents
A kind of five screw rods for refining shaping Download PDFInfo
- Publication number
- CN106050643B CN106050643B CN201610572189.0A CN201610572189A CN106050643B CN 106050643 B CN106050643 B CN 106050643B CN 201610572189 A CN201610572189 A CN 201610572189A CN 106050643 B CN106050643 B CN 106050643B
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- Prior art keywords
- screw rod
- tooth
- driven
- epicycloid
- driving screw
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- 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
- F04C2/165—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 having more than two rotary pistons with parallel axes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/36—Thread cutting; Automatic machines specially designed therefor by grinding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N13/00—Lubricating-pumps
- F16N13/20—Rotary pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N13/00—Lubricating-pumps
- F16N13/20—Rotary pumps
- F16N2013/205—Screw pumps
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Pumps (AREA)
Abstract
The invention discloses a kind of five screw rods for refining shaping, including a driving screw rod and four root architecture identical driven screws, the driving screw rod is in centre, four driven screws are distributed uniformly and circumferentially around driving screw rod, driving screw rod and the rotation direction of driven screw are on the contrary, the screw pair of composition parallel axes external toothing, a dextrorotation, another is left-handed, forms conjugate relation.Because the screw type face of the present invention is the connection that smoothly transits, thus its processing method can take numerical-control screw rod rotor grinding machine to refine the flank of tooth, type face processing efficiency improves more than 3 times, improve the surface accuracy in type face, reduce the tooth form error of division, so that the operation noise of five-screw pump and vibration reduce 20 ~ 30%, the screw rod life-span more than 50% is improved.
Description
Technical field
The invention belongs to screw pump technology field, is related to a kind of five-screw pump technology, more specifically, it relates to a kind of essence
Wear into five screw rods of type.
Background technology
Five-screw pump as oil pump and is altered oil pump and obtained greatly because its low pressure and mass flow, reliability are high, at present on naval vessel
Amount application.But existing five-screw pump can not meet the needs of naval vessel development on noise and vibration index.Due to present
The screw rod of five-screw pump uses D type tooth forms, determines that the final processing method in five screw spiral type faces is contour turning, can not adopt
It is molded with fine grinding, the roughness and the tooth form error of division for causing its spiral surface do not reach optimal requirement, whole so as to have influence on
The noise and vibration index of five-screw pump.
The content of the invention
It is a primary object of the present invention in view of the above-mentioned problems, providing a kind of five screw rods for refining shaping.
A kind of five screw rods for refining shaping, including a root architecture identical driven screw 2 of driving screw rod 1 and four, it is described
Driving screw rod 1 is distributed uniformly and circumferentially in centre, four driven screws 2 around driving screw rod 1, driving screw rod 1 and driven
The rotation direction of screw rod 2 on the contrary, the screw pair of composition parallel axes external toothing, a dextrorotation, another is left-handed, close by formation conjugation
System.
The technical scheme further limited is as follows：
The driving screw rod 1 is consistent with the head number of driven screw 2 and is double end, and helical pitch is equal.
The driving screw rod 1 is concave tooth shape, and driven screw 2 is double wedge shape, and the tooth form of driving screw rod 1 is by root circle c1d1, tooth top
Circle a1f1, sealing tooth curve a1b1c1With power transmission tooth curve d1e1f1Composition, the sealing tooth curve a1b1c1By epicycloid
a1b1With prolate epicycloid b1c1Composition, power transmission tooth curve d1e1f1By prolate epicycloid d1e1With involute e1f1Composition；It is described
The tooth form of driven screw 2 is by root circle c2d2, outside circle a2f2, sealing tooth curve a2b2c2With power transmission tooth curve d2e2f2Composition,
The sealing tooth curve a2b2c2By epicycloid a2b2With prolate epicycloid b2c2Composition, power transmission tooth curve d2e2f2By long width
Epicycloid d2e2With involute e2f2Composition；The driving screw rod 1 and each section of curve-equipartition of the tooth form of driven screw 2 be not corresponding
Unanimously.
The tooth form epicycloid a of driving screw rod 11b1With prolate epicycloid b1c1Smoothly transitted connection in point of intersection approximation, it is long
Width epicycloid b1c1, root circle c1d1, prolate epicycloid d1e1With involute e1f1Smoothly transitted connection in point of intersection；It is described driven
The tooth form epicycloid a of screw rod 22b2With prolate epicycloid b2c2Smoothly transitted connection in point of intersection approximation, prolate epicycloid b2c2, tooth root
Circle c2d2, prolate epicycloid d2e2With involute e2f2Smoothly transitted connection in point of intersection.
The tip diameter da of the driving screw rod 1 and driven screw 2, reference diameter dj and root diameter df difference
Correspondent equal.
The root circle central angle τ of the driving screw rod 11With the outside circle central angle τ of driven screw 22It is equal, take 10 ~ 15 °.
The metalworking process sequence of the driving screw rod 1 and driven screw 2 is：Using being forged after structural alloy steel bar blanking
Base, normalizing, rough turn cylindrical, numerically controlled lathe smart cars at different levels are at different levels cylindrical and tooth form, flank of tooth Surface hardened layer, numerical-control screw rod rotor grinding machine
The flank of tooth is refined, after form grinding is processed, type surface roughness reaches less than Ra0.8 μm, and the error of division of tooth form is controlled 20 "
Within.
The remarkable result of the present invention embodies in the following areas：
（1）The tooth form of five screw rods of the invention is combined using sealing tooth form and power transmission tooth form, and the connection of whole tooth form is near
Seemingly smoothly transit, in the absence of big wedge angle, therefore finishing step can use form grinding to process.
（2）Finishing step is processed using form grinding after the five screw type faces hardening of the present invention, improves surface accuracy,
The tooth form error of division is reduced, therefore more stable in screw rod operation, noise and screw rod of the vibration than contour turning finishing
Small by 20 ~ 30%, the life-span of screw rod improves more than 50%.
（3）The five screw type faces of the present invention are finished using form grinding, and processing efficiency improves 3 than contour turning finishing
More than times.
Brief description of the drawings
Fig. 1 is three-dimensional engagement and the tooth form mesh schematic representation of the present invention；
Fig. 2 is driving screw rod tooth form of the present invention and schematic three dimensional views；
Fig. 3 is driven screw tooth form of the present invention and schematic three dimensional views；
Fig. 4 is that driving screw rod of the present invention is ground schematic diagram；
Fig. 5 is that driven screw of the present invention is ground schematic diagram；
Fig. 6 is the tooth form engagement figure of the former screw rod of D types five；
Fig. 7 is the former screw rod driving screw rod tooth form figure of D types five；
Fig. 8 is the former screw rod driven screw tooth form figure of D types five.
Sequence number in upper figure：Driving screw rod 1, driven screw 2, driving screw rod abrasive grinding wheel 3, driven screw abrasive grinding wheel 4, original
The screw rod driving screw rod 5 of D types five, the screw rod driven screw 6 of former D types five.
Embodiment
Below in conjunction with the accompanying drawings, the present invention is further described by embodiment.
Embodiment
Referring to Fig. 6, former the screw rod driving screw rod 5 of D types five and the tooth form of driven screw 6 are double end unsymmetrical tooth profile.Referring to figure
7, the former tooth form of five screw rod driving screw rod of D types 5 is by prolate epicycloid a3b3, prolate epicycloid b3c3, root circle c3d3, prolate epicycloid
d3e3, involute e3f3With curtate epicycloid f3g3Composition.Referring to Fig. 8, the former tooth form of five screw rod driven screw of D types 6 outside long width by putting
Line a4b4, prolate epicycloid b4c4, root circle c4d4, prolate epicycloid d4e4, involute e4f4With curtate epicycloid f4g4Composition.It is former
The root circle central angle τ of five screw rod driving screw rod of D types 53With the outside circle central angle τ of driven screw 64It is equal, typically take 30 °.
Because the former tooth form of five screw rod driving screw rod of D types 5 is in prolate epicycloid a3b3With prolate epicycloid b3c3Place, driven spiral shell
The tooth form of bar 6 is in prolate epicycloid a4b4With prolate epicycloid b4c4The processing work that big wedge angle determines its screw type face be present in place
Skill, generally：Rough turn → half smart car → smart car → Surface hardened layer → grinding.Half smart car and smart car are processed using contour turning, right
The skill level requirement of processor is high, needs constantly to carry out the comparison in type face, essence with comparison model during contour turning
Surface hardening treatment could be carried out after car is complete, screw type face Surface hardened layer can not carry out profiling finishing processing finishing later,
Therefore finally the transmission performance of screw rod is influenceed in order to eliminate screw type surface roughness and the tooth form error of division, it is also necessary to ground
Mill.The process efficiency in whole screw type face is low, and the screw type surface roughness of final molding is bad and the tooth form error of division
The performance indications of whole five-screw pump, particularly noise and vibration index are had influence on greatly.
Referring to Fig. 1, Fig. 2 and Fig. 3, a kind of five screw rods for refining shaping, including a driving screw rod 1 are identical with four root architectures
Driven screw 2, the driving screw rod 1 is distributed uniformly and circumferentially in centre, four driven screws 2 around driving screw rod 1,
Driving screw rod 1 and the rotation direction of driven screw 2 are on the contrary, the screw pair of composition parallel axes external toothing, and a dextrorotation, another is left
Rotation, form conjugate relation.
The driving screw rod 1 is consistent with the head number of driven screw 2 and is double end, and helical pitch is equal.
The driving screw rod 1 is concave tooth shape, and driven screw 2 is double wedge shape, and the tooth form of driving screw rod 1 is by root circle c1d1, tooth top
Circle a1f1, sealing tooth curve a1b1c1With power transmission tooth curve d1e1f1Composition, the sealing tooth curve a1b1c1By epicycloid
a1b1With prolate epicycloid b1c1Composition, power transmission tooth curve d1e1f1By prolate epicycloid d1e1With involute e1f1Composition；It is described
The tooth form of driven screw 2 is by root circle c2d2, outside circle a2f2, sealing tooth curve a2b2c2With power transmission tooth curve d2e2f2Composition,
The sealing tooth curve a2b2c2By epicycloid a2b2With prolate epicycloid b2c2Composition, power transmission tooth curve d2e2f2By long width
Epicycloid d2e2With involute e2f2Composition；The driving screw rod 1 and each section of curve-equipartition of the tooth form of driven screw 2 be not corresponding
Unanimously.
The tooth form epicycloid a of driving screw rod 11b1With prolate epicycloid b1c1Smoothly transitted connection in point of intersection approximation, it is long
Width epicycloid b1c1, root circle c1d1, prolate epicycloid d1e1With involute e1f1Smoothly transitted connection in point of intersection；It is described driven
The tooth form epicycloid a of screw rod 22b2With prolate epicycloid b2c2Smoothly transitted connection in point of intersection approximation, prolate epicycloid b2c2, tooth root
Circle c2d2, prolate epicycloid d2e2With involute e2f2Smoothly transitted connection in point of intersection.
The tip diameter da of the driving screw rod 1 and driven screw 2, reference diameter dj and root diameter df difference
Correspondent equal.
The root circle central angle τ of the driving screw rod 11With the outside circle central angle τ of driven screw 22It is equal, take 10 ~ 15 °.
The present embodiment takes τ1=τ2=13°。
Sealing tooth form a in driving screw rod 1 and driven screw 21b1c1And a2b2c2Mutually conjugation, plays sealing function.Pass
Power tooth form d1e1f1And d2e2f2Intermeshing, plays transmission moment loading, driving screw rod 1 passes through power transmission tooth form d1e1f1Driving four
The engagement rotation of root driven screw 2, torque is transferred on driven screw 2.
The tooth form epicycloid a of driving screw rod 11b1With prolate epicycloid b1c1Smoothly transitted connection in point of intersection approximation, driven spiral shell
The tooth form epicycloid a of bar 22b2With prolate epicycloid b2c2Smoothly transitted connection in point of intersection approximation；Outside the long width of the tooth form of driving screw rod 1
Cycloid d1e1With involute e1f1Smoothly transitted connection in point of intersection, the tooth form prolate epicycloid d of driven screw 22e2With involute e2f2
Smoothly transit connection in point of intersection, therefore can smoothly be transmitted during the engagement rotation of driving screw rod 1 and driven screw 2
Torque.
Referring to Fig. 4 and Fig. 5, the metalworking process sequence of the driving screw rod 1 and driven screw 2 is：Using alloy structure
Forging stock after rod iron material blanking, normalizing, rough turn cylindrical, numerically controlled lathe smart cars at different levels are at different levels cylindrical and tooth form, flank of tooth Surface hardened layer, number
The screw rotor grinding machine fine grinding flank of tooth is controlled, after form grinding is processed, type surface roughness reaches less than Ra0.8 μm, point of tooth form
Control errors are spent 20 " within.Screw pair is more stable in the process of running, noise and spiral shell of the vibration than contour turning finishing
Bar is small by 20 ~ 30%, improves the life-span more than 50% of screw rod, and processing efficiency improves more than 3 times than contour turning finishing.
In the present embodiment, materials'use structural alloy steel 40Cr bars are processed, and flank of tooth high-frequency quenching hardness is HRC50
~55, depth of hardening zone is 1.0~1.5mm, and fine grinding type face rear profile surface roughness reaches Ra0.5 μm, the error of division of tooth form
17″.The numerical control programming dresser that emery wheel 3, emery wheel 4 configure by numerical-control screw rod rotor grinding machine enters according to tooth curve data
Row shaping.
Above content is not to make any formal limitation to structure, the shape of the present invention.Every skill according to the present invention
Any simple modification, equivalent change and modification that art is substantially made to above example, still falls within technical solution of the present invention
In the range of.
Claims (5)
1. a kind of five screw rods for refining shaping, including a driving screw rod（1）With four root architecture identical driven screws（2）, its
It is characterized in, the driving screw rod（1）In centre, four driven screws（2）Around driving screw rod（1）Along the circumferential direction uniformly divide
Cloth, driving screw rod（1）And driven screw（2）Rotation direction on the contrary, composition parallel axes external toothing screw pair, a dextrorotation,
Another is left-handed, forms conjugate relation；
The driving screw rod（1）For concave tooth shape, driven screw（2）For double wedge shape, driving screw rod（1）Tooth form is by root circle c1d1, tooth
Tip circle a1f1, sealing tooth curve a1b1c1With power transmission tooth curve d1e1f1Composition, the sealing tooth curve a1b1c1By outer pendulum
Line a1b1With prolate epicycloid b1c1Composition, power transmission tooth curve d1e1f1By prolate epicycloid d1e1With involute e1f1Composition；Institute
State driven screw（2）Tooth form is by root circle c2d2, outside circle a2f2, sealing tooth curve a2b2c2With power transmission tooth curve d2e2f2
Composition, the sealing tooth curve a2b2c2By epicycloid a2b2With prolate epicycloid b2c2Composition, power transmission tooth curve d2e2f2By
Prolate epicycloid d2e2With involute e2f2Composition；The driving screw rod（1）With driven screw（2）Each section of curve of tooth form is equal
Correspond to respectively consistent；
The driving screw rod（1）Tooth form epicycloid a1b1With prolate epicycloid b1c1Smoothly transitted connection in point of intersection approximation, long width
Epicycloid b1c1, root circle c1d1, prolate epicycloid d1e1With involute e1f1Smoothly transitted connection in point of intersection；The driven spiral shell
Bar（2）Tooth form epicycloid a2b2With prolate epicycloid b2c2Smoothly transitted connection in point of intersection approximation, prolate epicycloid b2c2, tooth root
Circle c2d2, prolate epicycloid d2e2With involute e2f2Smoothly transitted connection in point of intersection.
2. a kind of five screw rods for refining shaping according to claim 1, it is characterized in that, the driving screw rod（1）With it is driven
Screw rod（2）Head number it is consistent and be double end, helical pitch is equal.
3. a kind of five screw rods for refining shaping according to claim 1, it is characterized in that, the driving screw rod（1）With it is driven
Screw rod（2）Tip diameter da, reference diameter dj and root diameter df difference correspondent equal.
4. a kind of five screw rods for refining shaping according to claim 1, it is characterized in that, the driving screw rod（1）Tooth root
Circle central angle τ1And driven screw（2）Outside circle central angle τ2It is equal, take 10 ~ 15 °.
5. a kind of five screw rods for refining shaping according to claim 1, it is characterized in that, the driving screw rod（1）With it is driven
Screw rod（2）Metalworking process sequence be：Using forging stock, normalizing, rough turn cylindrical, numerical controls at different levels after structural alloy steel bar blanking
Lathe smart car is at different levels cylindrical and tooth form, flank of tooth Surface hardened layer, numerical-control screw rod rotor grinding machine refine the flank of tooth, is processed by form grinding
Afterwards, type surface roughness reaches less than Ra0.8 μm, and the error of division of tooth form is controlled 20 " within.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610572189.0A CN106050643B (en) | 2016-07-20 | 2016-07-20 | A kind of five screw rods for refining shaping |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610572189.0A CN106050643B (en) | 2016-07-20 | 2016-07-20 | A kind of five screw rods for refining shaping |
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| CN106050643A CN106050643A (en) | 2016-10-26 |
| CN106050643B true CN106050643B (en) | 2018-04-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113910015B (en) * | 2021-09-30 | 2022-10-18 | 盐城斯柯达机械科技有限公司 | High-precision screw outer circle polishing machine |
| CN117415393B (en) * | 2023-12-18 | 2024-02-23 | 邯郸市质非凡紧固件有限公司 | Surface grinding device for processing outer hexagon bolts |
| CN117798819B (en) * | 2024-03-01 | 2024-05-07 | 江苏通压压缩机有限公司 | Tool fixture for screw machining of screw compressor |
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