CN1012002B - Threaded bolt compression (or expansion) machine using joggle-joint-set - Google Patents
Threaded bolt compression (or expansion) machine using joggle-joint-setInfo
- Publication number
- CN1012002B CN1012002B CN 85109065 CN85109065A CN1012002B CN 1012002 B CN1012002 B CN 1012002B CN 85109065 CN85109065 CN 85109065 CN 85109065 A CN85109065 A CN 85109065A CN 1012002 B CN1012002 B CN 1012002B
- Authority
- CN
- China
- Prior art keywords
- wheel
- star
- mesh
- engagement pair
- machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Gears, Cams (AREA)
Abstract
The present invention proposes that a circular-table (column) secondary enveloping surface mesh pair is used instead of various primary enveloping surface mesh pairs widely used in the existing single screw compressor (or expander). The novel mesh pair is convenient to process, is suitable for bulk production, and has ideal surface roughness and high mesh precision. Two instantaneous contact line groups exist in the mesh movement, so that lubricating oil has the extrusion effect so as to enhance the operational reliability and extend the service life of the compressor (or expander).
Description
The present invention relates to a kind of rotary-piston type fluid machine, relate to a kind of screw engages pair that is used for compressor or decompressor or rather.
Single screw compression (or expansion) machine, because simple in structure, easy to maintenance, operational reliability is good since invention, development in recent years is rapid, is widely used in fields such as aerodynamic, chemical industry, building, refrigeration.Screw rod, star-wheel engagement pair are the critical components of single screw compression (or expansion) machine.The design of engagement pair molded lines is improper, and under the situation of high rotating speed, high relative sliding velocity, star-wheel work tooth is quick-wearing very, causes the back lash to increase, and air displacement sharply descends, and has a strong impact on the reliability and the working life of machine works.Rational engagement pair molded lines, guarantee that engagement pair can obtain stable hydrodynamic lubrication in the course of the work, make engagement pair realize " no Metal Contact ", reduce the wearing and tearing of star-wheel effectively, can fundamentally solve the reliability and the life problems of single screw compression (or expansion) machine work.
Early seventies, BZimmern propose again " round platform (post) first enveloped face engagement pair " (British Patent 1388537) after " straight line first enveloped face engagement pair ".Fig. 1 is the mesh schematic representation of Zimmern " round platform (post) first enveloped face engagement pair ".Wherein star-wheel (2) flank working surface is the part of round platform (post) face, and the both sides of its tooth (or a side) working surface is by gear motion shown in Figure 1, just can envelope goes out both sides (or a side) helicoid of screw rod (1) teeth groove.When star-wheel flank working surface replaces with the milling cutter of identical shaped (round platform or cylinder) or emery wheel, just can process and meet the screw rod teeth groove that engagement requires.The engagement pair of this " first enveloped face " is the hydrodynamic lubrication poor-performing not only, wearing and tearing are accelerated, and star-wheel flank working surface can only be processed with the emery wheel calibration, make processing difficulties (particularly tooth root part), error of graduation influences the accuracy of mesh, thereby influences the reliability and the working life of machine.
The objective of the invention is to overcome above-mentioned shortcoming, make engagement pair have more good hydrodynamic lubrication performance, dynamic pressure oil film is stable, improved the reliability and the working life of machine, and star-wheel flank working surface is easy to process, machining error is few, the productivity height is applicable to production in enormous quantities.
The formation of " round platform (post) secondary enveloping surface engagement pair " be earlier with round platform (post) face as generatrix, go out screw rod teeth groove helicoid by gear motion envelope shown in Figure 1, obtain the first enveloped screw rod, screw rod teeth groove helicoid thus then, go out the both sides working surface of star-wheel tooth by same gear motion envelope, obtain the twice-enveloping star-wheel.With first enveloped screw rod and the engagement of twice-enveloping star-wheel, promptly constitute engagement pair of the present invention.
Accompanying drawing 1 is existing " round platform (post) first enveloped face engagement pair " schematic representation.
Accompanying drawing 2a is that " round platform (post) secondary enveloping surface engagement pair " looks the instantaneous contact line before star-wheel on the flank of tooth from the de-rotation direction.
Accompanying drawing 2b is that " round platform (post) secondary enveloping surface engagement pair " looks the instantaneous contact line on the flank of tooth behind the star-wheel from clockwise moving direction.
Accompanying drawing 3a is the sectional view of star-wheel tooth before " round platform (post) secondary enveloping surface engagement pair " engagement.
Accompanying drawing 3b is that screw rod and star-wheel have just entered the sectional view when meshing.
Accompanying drawing 3c is screw rod and the sectional view of star-wheel in engagement process to 3e.
Sectional view when accompanying drawing 3f is screw rod and star-wheel engagement end.
More than in each accompanying drawing, accompanying drawing 2 be according to the first and second envelope contact conditions of " round platform (post) secondary enveloping surface engagement pair " and mesh equation (Φ.
ц т в и н: Т e о р ц
R З у б а т ы х З а ц e н ц ǔ, И З Д 2, " HAYKA ", 1962) instantaneous contact line that draws.Accompanying drawing 3 is sectional views of star-wheel and screw engages.
Below in conjunction with accompanying drawing the present invention is done narration further.
The engagement pair that engagement pair of the present invention is made up of a screw rod and the plane star-wheel that is opposite to its both sides adopts this " round platform (post) secondary enveloping surface engagement pair " in the advantage of aspect of performance, can illustrate by following embodiment.Screw rod and star-wheel diameter D=120mm, centre distance A=96mm, screw slot is counted Z
1=6, tooth number of star Z
2=11, velocity ratio i
12=1.833.
Referring to Fig. 2 a and Fig. 2 b, K-K is a mesh boundary line, and it has been divided into two-part to the star-wheel flank of tooth: ∑
II 2And ∑
II 1L
II 1Flank of tooth ∑ when being first enveloped
II 1On former instantaneous contact line family.L
II 2Flank of tooth ∑ when being twice-enveloping
II 2On instantaneous contact line family.φ among the figure
2Be the star-wheel corner.When gear motion, the L of Line of contact family
II 1All the time exist, play a part the sealing element volume; The L of Line of contact family
II 2Only be present in certain corner φ
2In the scope, play a part to disperse load and wear range.There is not L in " first enveloped face engagement pair "
II 2
Referring to Fig. 3, Fig. 3 a is the sectional view of star-wheel face before the engagement; Fig. 3 b represents that screw rod and star-wheel have just entered engagement, has only an instantaneous contact line this moment; Fig. 3 c represents the carrying out along with gear motion, produces another root instantaneous contact line, has formed oil pocket between two Line of contact; Subsequently two instantaneous contact lines rapidly near (Fig. 3 d, e) until overlapping (Fig. 3 f) fully at mesh boundary K place.Among the figure
The II IBe the relative velocity of star-wheel to screw rod.Because the engagement pair rotating speed is big, the lubricant oil in the oil pocket has little time to release, and oil pressure raises, thereby strengthens the intensity and the bearing capacity of oil film, and promptly so-called extrusion effect has been strengthened the stability of oil film, the operational reliability and the working life of having improved machine." first enveloped face engagement pair " no extrusion effect.
Lubricated angle θ V is meant the directed angle from the tangent line of Line of contact to the speed of related movement direction.Can it be the important symbol that form dynamic pressure oil film between relative movement two flank of tooth.When θ V equals or during near 90 °, lubricating condition the best.In the present embodiment, corresponding to first enveloped flank of tooth part, 86.3464 °≤θ V
1≤ 88.5605 °; Corresponding to twice-enveloping flank of tooth part, 82.3162 °≤θ V
2≤ 89.0537 °.So this engagement pair has the good condition that forms hydrodynamic lubrication.
Minimum oil film thickness between engagement pair can use Matin equation (woods light, Xu are big anti-etc.: " gear-driven lubricated ", China Machine Press, 1980) to calculate: h
0=4.9 η UR * 10
4/ W, h in the formula
0Be minimum oil film thickness, μ m; η is the kinetic viscosity of lubricant oil when operating temperature, PaS; W is the load on the unit length, N/cm; U draws speed, cm/S for volume; R is a Relative radius of curvature.In the present embodiment, corresponding to first enveloped flank of tooth part, R
1Root-mean-square value be 6.1843～7.5461; U
1Root-mean-square value be 7536.8～8515.57mm/s; Corresponding to twice-enveloping flank of tooth part, R
2=11824.8～7625.24; U
2=6903.21～9436.78mm/s.As seen, U
1With U
2Numeric ratio more approaching, and R
2But than R
1Much bigger, thereby under same condition, " round platform (post) secondary enveloping surface engagement pair " is much thicker than " first enveloped face engagement pair " formed dynamic pressure oil film.Get W=100N/cm in the present embodiment, adopt No. 18 refrigerator oils at 120 o'clock η=2.7729-
3PaS can get h
0=30.25 μ m.
Claims (1)
1, a kind of be applied to compression (or expand) machine, by a screw rod be opposite to the engagement pair that the plane star-wheel of its both sides is formed, it is characterized in that this engagement pair is a kind of " round platform (post) secondary enveloping surface engagement pair ", when gear motion, have two instantaneous contact line families.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85109065 CN1012002B (en) | 1985-12-10 | 1985-12-10 | Threaded bolt compression (or expansion) machine using joggle-joint-set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85109065 CN1012002B (en) | 1985-12-10 | 1985-12-10 | Threaded bolt compression (or expansion) machine using joggle-joint-set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85109065A CN85109065A (en) | 1986-09-03 |
| CN1012002B true CN1012002B (en) | 1991-03-13 |
Family
ID=4796227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85109065 Expired CN1012002B (en) | 1985-12-10 | 1985-12-10 | Threaded bolt compression (or expansion) machine using joggle-joint-set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1012002B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE508087C2 (en) * | 1996-12-16 | 1998-08-24 | Svenska Rotor Maskiner Ab | Pairs of cooperating screw rotors, screw rotor and screw rotor machine equipped with such screw rotors |
| AU1016801A (en) * | 1999-10-26 | 2001-05-08 | Shiliang Zha | A single screw compressor |
| CN100351524C (en) * | 2005-03-17 | 2007-11-28 | 西安交通大学 | Method for designing a profile enveloped by multi straight lines of engagement pair for single screw compressor |
| JP4155330B1 (en) * | 2007-05-14 | 2008-09-24 | ダイキン工業株式会社 | Single screw compressor |
| US8348648B2 (en) * | 2007-08-07 | 2013-01-08 | Daikin Industries, Ltd. | Single screw compressor |
| JP4229213B1 (en) * | 2007-08-07 | 2009-02-25 | ダイキン工業株式会社 | Single screw compressor and screw rotor processing method |
| CN101424266B (en) * | 2008-12-22 | 2010-12-15 | 李锦上 | Oblique star wheel single screw compressor |
| CN101655032A (en) * | 2009-09-30 | 2010-02-24 | 李锦上 | Single screw-rod engine and energy converting method thereof |
| CN102094819A (en) * | 2011-03-07 | 2011-06-15 | 艾赫威(北京)科技有限公司 | Single-screw compressor with double elliptical generating surface and secondary enveloped mold line |
| CN104405830B (en) * | 2014-09-17 | 2017-02-15 | 西安交通大学 | Collaborative construction method for cylindrical envelope molded lines of two side faces of star wheel teeth |
| CN107905849A (en) * | 2017-11-02 | 2018-04-13 | 西安交通大学 | A kind of flat single-screw expander |
-
1985
- 1985-12-10 CN CN 85109065 patent/CN1012002B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85109065A (en) | 1986-09-03 |
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