CN203453051U - Oil pump rotor - Google Patents
Oil pump rotor Download PDFInfo
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- CN203453051U CN203453051U CN201320512562.5U CN201320512562U CN203453051U CN 203453051 U CN203453051 U CN 203453051U CN 201320512562 U CN201320512562 U CN 201320512562U CN 203453051 U CN203453051 U CN 203453051U
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- rotor
- line
- internal rotor
- radius
- root
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Abstract
The utility model provides an oil pump rotor, aiming to solve the problems of easy jamming of the rotor, large noise and the like in gear cutting interference and tooth profile intersection of an internal meshing cycloid gear which is universally adopted at present. The oil pump rotor comprises an inner rotor and an outer rotor, which are meshed with each other, wherein the quantity of teeth of the inner rotor is n; the quantity of the teeth of the outer rotor is n+1; the distance between the center of the inner rotor and the center of the outer rotor is equal to the difference between the pitch radius of the inner rotor and the pitch radius of the outer rotor; the radial clearance delta between the inner rotor and the outer rotor is equal to 0.1-0.2mm; the tip cone clearance delta of the inner rotor and the outer rotor is equal to 0.03-0.18mm; the tooth profile of the inner rotor comprises a tip cone line, a tooth root line, and a transition connecting line which is smoothly connected with the tip cone line and the tooth root line; the tooth profile of the outer rotor comprises a tip cone line, a tooth root line, and a transition connecting line which is smoothly connected with the tip cone line and the tooth root line; and the tip cone line of the outer rotor is a curve conjugated with the tooth root line of the inner rotor.
Description
Technical field
The utility model is to belong to hydraulic transmission technology field, is specifically related to a kind of hydraulic-pressure pump rotor structure.
Background technique
The poor interior engagement cycloid gear pump of a tooth that hydraulic-pressure pump generally adopts at present, the flank profil of its rotor forms as follows, adopts the interior equidistant curve of curtate cyclod as internal rotor flank profil, utilizes the circular curve of equidistant curve conjugation in curtate cyclod as external rotor flank profil.Though this type of oil hydraulic-pump rotor has compact structure, the advantages such as the life-span is long, but in the short width of internal rotor, equidistant curve flank profil very easily produces cutter interference and flank profil intersection, and flank profil forms difficulty, must, through repeatedly adjusting internal rotor cycloidal profile parameter, also carry out if desired correction of the flank shape processing; Particularly when the rotor number of teeth of engagement is larger, external rotor circular arc profile radius hour more easily produces cutter interference and flank profil is intersected, even can form flank profil by correction of the flank shape, also easily produces profile modification error and produces rotor galloping, the phenomenons such as noise increases, and rotor is easy stuck.Above-mentioned shortcoming has hindered further developing of interior engagement Gerotor pump.
Summary of the invention
The purpose of this utility model is to provide a kind of novel hydraulic-pressure pump rotor, and the cutter interference and the flank profil that solve the interior engagement cycloidal gear generally adopting are at present intersected, the rotor problems such as easily stuck, noise is larger.
For realizing the technological scheme that the utility model object adopts, be such, a kind of oil hydraulic-pump rotor, comprise intermeshing internal rotor and external rotor, the number of teeth of internal rotor is n, the number of teeth of external rotor is n+1, it is characterized in that: the distance between the center of described internal rotor and the center of external rotor equals the poor of the Pitch radius of internal rotor and the Pitch radius of external rotor, radial clearance Δ=0.1～the 0.2mm of described internal rotor and external rotor, the tooth top gap δ=0.03～0.18mm of described internal rotor and external rotor.The flank profil of described internal rotor comprises addendum line and Root line, and the transition connecting line of addendum line and Root line described in smooth connection.The flank profil of described external rotor comprises addendum line and Root line equally, and the transition connecting line of addendum line and Root line described in smooth connection.The addendum line of described external rotor is the curve with the Root line conjugation of described internal rotor.
Further, the addendum line of described internal rotor, Root line and transition connecting line are circular arc line; The line style of described external rotor tooth root line and transition connecting line is circular arc line.The addendum line of external rotor is the conjugate curve of internal rotor Root line.Be that described internal rotor flank profil forms by meshing circular arc, tooth top circular arc and transition arc slip, external rotor flank profil is by forming with internal rotor engagement circular arc conjugate curve, tooth root circular arc and transition arc slip, and this forms with the flank profil of the interior engagement cycloidal gear generally adopting just the opposite.
The beneficial effects of the utility model: compare with interior engagement cycloidal gear pump rotor, adopt circular arc as the contacting profile of internal rotor, with the curve of the internal rotor circular arc conjugation novel rotor as external rotor flank profil, its flank profil forms more simple, has avoided the flank profil cutter interference of cycloid tooth wheel set and flank profil to intersect.The advantages such as the gear pump that adopts novel rotor, has not only possessed interior engagement cycloid gear pump compact structure, lightweight, and the life-span is long, and running is more steady, and noise is low, is difficult for the features such as stuck, thereby has more use value widely.By changing rotor parameter, can obtain different displacements and form circular-arc gear pump in series simultaneously.
Technique effect of the present utility model is mathematical.
Accompanying drawing explanation
The indefiniteness embodiment that device of the present utility model can provide by accompanying drawing further illustrates.
Fig. 1 is the mesh schematic representation of internal rotor and external rotor;
Fig. 2 is inner rotor core schematic diagram;
Fig. 3 is outer-rotor structure schematic diagram;
Fig. 4 is internal rotor Root line arc length restriction schematic diagram.
In figure: 1-internal rotor, 2-external rotor.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, but should not be construed the above-mentioned subject area of the utility model, only limits to following embodiment.In the situation that not departing from the above-mentioned technological thought of the utility model, according to ordinary skill knowledge and customary means, make various replacements and change, all should be included within the scope of the utility model.
A kind of oil hydraulic-pump rotor, comprise intermeshing internal rotor 1 and external rotor 2, the number of teeth of internal rotor 1 is n, the number of teeth of external rotor 2 is n+1, distance between the center of the center of described internal rotor 1 and external rotor 2 equals the poor of the Pitch radius of internal rotor 1 and the Pitch radius of external rotor 2, the radial clearance Δ=0.1～0.2mm of described internal rotor 1 and external rotor 2.The tooth top gap δ=0.03～0.18mm of described internal rotor 1 and external rotor 2.The flank profil of described internal rotor 1 comprises addendum line and Root line, and the transition connecting line of addendum line and Root line described in smooth connection.The flank profil of described external rotor 2 comprises addendum line and Root line equally, and the transition connecting line of addendum line and Root line described in smooth connection.The addendum line of described external rotor 2 is the curves with the Root line conjugation of described internal rotor 1.
In specific embodiment mode, the number of teeth of described internal rotor 1 is 9, and the number of teeth of external rotor 2 is 10, centre distance when above-mentioned internal rotor 1 meshes with external rotor 2
be 3.5, equal the Pitch radius of internal rotor 1
pitch radius with external rotor 2
poor,, radial clearance Δ=0.15mm, tooth top gap
.In this mode of execution, the Root line of the addendum line of described internal rotor 1, Root line and transition connecting line and external rotor 2 and the line style of transition connecting line are circular arc line, and the addendum line of external rotor 2 is the conjugate curve of the Root line of internal rotor 1.The flank profil that is internal rotor 1 is smoothly connected and forms by meshing circular arc, tooth top circular arc and transition arc, and the circular arc profile arc length of internal rotor 1 is limited by center of arc's radius and internal rotor pitch circle.The flank profil of external rotor 2 is by being smoothly connected and forming with internal rotor engagement circular arc conjugate curve, tooth root circular arc and transition arc, and this forms with the flank profil of the interior engagement cycloidal gear generally adopting just the opposite.Accompanying drawing 1～4 has been shown said structure, in figure:
for internal rotor profile,
for internal rotor engagement circular arc,
for internal rotor tooth top circular arc,
for internal rotor transition arc,
for external rotor profile,
for the curve with internal rotor engagement circular arc conjugation,
for external rotor tooth root circular arc,
for external rotor transition arc,
centered by distance, 3 is internal rotor pitch circle, 4 is external rotor pitch circle,
for internal rotor center,
for external rotor center,
for internal rotor engagement center of arc,
radial clearance,
tip clearance,
internal rotor Pitch radius,
external rotor Pitch radius,
for internal rotor engagement radius of arc,
for internal rotor engagement center of arc radius,
for internal rotor transition arc radius,
for internal rotor tooth top radius of arc,
for internal rotor Outside radius,
for internal rotor root radius,
for external rotor transition arc radius,
for external rotor Outside radius,
for external rotor tooth root circular arc and root radius,
,
for the point of contact on internal rotor engagement center of arc and internal rotor pitch circle tangent line,
for crossing the tangent line of internal rotor engagement center of arc and internal rotor pitch circle,
the angle of Wei Guo internal rotor center of arc and internal rotor pitch circle two tangent lines.
In embodiment, the arc length of the Root line of described internal rotor 1 equals
,
.Be that in the arc length of the Root line of internal rotor 1 must meet and be limited in, this is also the important feature of the Root line of internal rotor 1, as shown in Figure 4.As previously mentioned, wherein,
for the Pitch radius of internal rotor 1,
for the Root line radius of internal rotor 1,
for internal rotor engagement center of arc radius.
Further, the tooth top radius of arc of internal rotor 1 is slightly less than Outside radius, is conducive to like this engages and seals, and the fillet radius of external rotor 2 equals Outside radius.
For avoiding rotor engagement time to interfere, the transition wire radius value of the radius of the transition wire of described internal rotor 1 and external rotor 2 is 0.8～1.5mm.Better mode is: the radius of the transition wire of described external rotor 2 is less than the transition wire radius of internal rotor 1.In the present embodiment, described in
be slightly less than
,
equal
, and
radius
value is 1.2mm,
radius
value is 1mm,
radius
be less than
radius
.
Claims (5)
1. an oil hydraulic-pump rotor, comprise intermeshing internal rotor (1) and external rotor (2), the number of teeth of internal rotor (1) is n, the number of teeth of external rotor (2) is n+1, it is characterized in that: the distance between the center of described internal rotor (1) and the center of external rotor (2) equals the poor of the Pitch radius of internal rotor (1) and the Pitch radius of external rotor (2), radial clearance Δ=0.1～the 0.2mm of described internal rotor (1) and external rotor (2), the tooth top gap δ=0.03～0.18mm of described internal rotor (1) and external rotor (2); The flank profil of described internal rotor (1) comprises addendum line and Root line, and the transition connecting line of addendum line and Root line described in smooth connection; The flank profil of described external rotor (2) comprises addendum line and Root line equally, and the transition connecting line of addendum line and Root line described in smooth connection; The addendum line of described external rotor (2) is the curve with the Root line conjugation of described internal rotor (1).
2. oil hydraulic-pump rotor according to claim 1, is characterized in that: the addendum line of described internal rotor (1), Root line and transition connecting line are circular arc line; The line style of described external rotor (2) Root line and transition connecting line is circular arc line.
3. oil hydraulic-pump rotor according to claim 2, is characterized in that: the arc length of the Root line of described internal rotor (1) equals
, wherein,
for the Pitch radius of internal rotor (1),
for the Root line radius of internal rotor (1),
for internal rotor engagement center of arc radius.
4. oil hydraulic-pump rotor according to claim 2, is characterized in that: the transition wire radius value of the radius of the transition wire of described internal rotor (1) and external rotor (2) is 0.8～1.5mm.
5. oil hydraulic-pump rotor according to claim 4, is characterized in that: the radius of the transition wire of described external rotor (2) is less than the transition wire radius of internal rotor (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320512562.5U CN203453051U (en) | 2013-08-22 | 2013-08-22 | Oil pump rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320512562.5U CN203453051U (en) | 2013-08-22 | 2013-08-22 | Oil pump rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203453051U true CN203453051U (en) | 2014-02-26 |
Family
ID=50132933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320512562.5U Expired - Lifetime CN203453051U (en) | 2013-08-22 | 2013-08-22 | Oil pump rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203453051U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530826A (en) * | 2021-07-12 | 2021-10-22 | 西安交通大学 | Multi-tooth space cycloid type inner meshing conical double-screw compressor rotor and compressor |
| CN113757121A (en) * | 2021-07-12 | 2021-12-07 | 西安交通大学 | Intersecting shaft transmission space internal engagement conical double-screw compressor rotor and compressor |
| CN114542454A (en) * | 2021-12-27 | 2022-05-27 | 贵州凯星液力传动机械有限公司 | Compound cycloid gear pump |
-
2013
- 2013-08-22 CN CN201320512562.5U patent/CN203453051U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530826A (en) * | 2021-07-12 | 2021-10-22 | 西安交通大学 | Multi-tooth space cycloid type inner meshing conical double-screw compressor rotor and compressor |
| CN113757121A (en) * | 2021-07-12 | 2021-12-07 | 西安交通大学 | Intersecting shaft transmission space internal engagement conical double-screw compressor rotor and compressor |
| CN113757121B (en) * | 2021-07-12 | 2022-05-20 | 西安交通大学 | Space internal meshing conical double-screw compressor rotor driven by intersecting shafts and compressor |
| CN114542454A (en) * | 2021-12-27 | 2022-05-27 | 贵州凯星液力传动机械有限公司 | Compound cycloid gear pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140226 |