CN202946377U - Oil pump rotor - Google Patents
Oil pump rotor Download PDFInfo
- Publication number
- CN202946377U CN202946377U CN 201220609218 CN201220609218U CN202946377U CN 202946377 U CN202946377 U CN 202946377U CN 201220609218 CN201220609218 CN 201220609218 CN 201220609218 U CN201220609218 U CN 201220609218U CN 202946377 U CN202946377 U CN 202946377U
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- Prior art keywords
- circle
- rotor
- round
- circular arc
- radius
- 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.)
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Abstract
The utility model aims at providing an oil pump rotor which has a smaller minimum pressure angle. For the aim, the technical scheme is as follows: the oil pump rotor comprises an inner rotor and an outer rotor which are mutually meshed, wherein profile curves of the inner rotor and the outer rotor are a pair of conjugate curves; the inner rotor has n outer teeth and the outer rotor has n+1 inner teeth, and n is a natural number which is greater than or equal to 3; when the inner rotor and the outer rotor are meshed, a central distance between the inner rotor and the outer rotor is a which is greater than 0; and any one tooth form of the outer rotor includes three tangent arcs. Through formation of the profile curve of the outer rotor, the oil pump component has a smaller minimum pressure angle in transmission, so as to reduce a contact force when the outer rotor and inner rotor of the oil pump rotor component are in transmission, and to achieve the purpose of improving transmission efficiency.
Description
Technical field
The utility model relates to the mating component similar to gear mechanism, particularly a kind of modified model oil hydraulic-pump rotor.
Background technique
The core of rotor-type oil pump forms oil hydraulic-pump rotor by the inner and outer rotors that is meshed.During work, internal rotor drives external rotor and rotates in the same direction together, and again because internal rotor lacks a tooth than external rotor, inner and outer rotors is in fact to carry out nonsynchronous in the same way rotation.
When the rotor tooth form tooth Profile Design must make rotor forward any angle to, on the profile of tooth profile of each tooth of inner and outer Rotator, total energy became mutually the some contact.Form so a plurality of active chambers between inner and outer Rotator, along with the rotation of rotor, the volume of active chamber is constantly to change.A side cavity at oil input channel, because rotor is thrown off engagement, volume increases gradually, produces vacuum, machine oil is inhaled into, rotor continues rotation, and machine oil is brought to a side of oil road, at this moment, rotor just in time enters engagement, this cavity volume is reduced, and oil pressure raises, and machine oil is extruded and goes out through the oil road force feed between cog.Like this, along with the continuous rotation of rotor, machine oil just constantly is inhaled into and extrudes.
According to the working principle of oil hydraulic-pump rotor assembly, require to have less pressure minimum angle during transmission, the contact force in the time of can reducing the external rotor of described oil hydraulic-pump rotor assembly and internal rotor transmission, thus reach the raising transmission efficiency.In order to satisfy above-mentioned requirements, need to design more rational inner and outer rotors profilogram.Epicycloid of the prior art, interior equidistant curve rotor etc. have all satisfied above-mentioned requirements to a certain extent, but still have improvements.
Summary of the invention
The purpose of this utility model is to provide a kind of oil hydraulic-pump rotor with less pressure minimum angle.
For realizing that the technological scheme that the utility model purpose adopts is such, a kind of oil hydraulic-pump rotor, comprise the internal rotor and the external rotor that are meshed, the profilogram of described internal rotor and external rotor is a pair of conjugate curve, and described internal rotor has n external tooth, described external rotor has n+1 internal tooth, and n is the natural number more than or equal to 3; When described internal rotor and external rotor were meshed, the centre distance of described inner and outer Rotator was a, a＞0.
Any one profile of tooth in described external rotor comprises three sections tangent circular arcs.
Further limit the shape of its external rotor, namely the profilogram shape of described any one profile of tooth of external rotor meets the curve shape that following steps are made:
1) take Oc as the center of circle, respectively with t
1, t
2, t
3For radius is made circle Q
1, the circle Q
2, the circle Q
3, some O
b1, the some O
b2, the some O
b3Respectively described round Q
1, the circle Q
2, the circle Q
3On point, with described some O
b1Be the center of circle, t
t1For radius is made circle B
1, with described some O
b2Be the center of circle, t
t2For radius is made circle B
2, with described some O
b3Be the center of circle, t
t3For radius is made circle B
3Described round B
1Respectively with circle B
2And B
3Be inscribed within an E and put F;
2) take Oc as the center of circle, r
fFor radius is made circle Q;
3) adopt the circular arc I will justify B
2Q is smoothly connected with circle, described circular arc I and circle B
2Intersect at a G, intersect at a H with circle Q; Adopt the circular arc II will justify B
3Q is smoothly connected with circle, described circular arc II and circle B
2Intersect at a J, intersect at a K with circle Q;
4) the round B between retention point E and some F
1, keep circular arc I and circular arc II, the round B between retention point E and some G
2, the round B between retention point F and some J
3, remove the round Q between some H and some K.
In above-mentioned parameter: t
1＞(n+1) * a, t
2＞(n+1) * a, t
3＞(n+1) * a, t
t1＞t
t2, t
t1＞t
t3, t
2-t
t2＞t
1-t
t1, t
3-t
t3＞t
1-t
t1, t
t2＞t
t1-(t
1 2-((n+1) * is a)
2)
0.5+ (t
2 2-((n+1) * is a)
2)
0.5, t
t3＞t
t1-(t
1 2-((n+1) * is a)
2)
0.5+ (t
3 2-((n+1) * is a)
2)
0.5, r
f=t
1-t
t1+ 2*a+ δ, 0.5 〉=δ 〉=0.01.
Technique effect of the present utility model is mathematical, the particularly formation of external rotor profilogram, has less pressure minimum angle when making described oil hydraulic-pump rotor assembly transmission, contact force in the time of can reducing the external rotor of described oil hydraulic-pump rotor assembly and internal rotor transmission, thus reach the purpose that improves transmission efficiency.
Description of drawings
Device of the present utility model can further illustrate by the indefiniteness embodiment that accompanying drawing provides.
Fig. 1 is the structural representation of inner and outer rotors;
Circle B when Fig. 2 is the formation of external rotor profilogram
1, the circle B
2, the circle B
3Schematic diagram with circle Q;
Fig. 3 is the partial enlarged drawing of L part in Fig. 2.
In figure: 1-internal rotor, 2-external rotor.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples, only limits to following embodiment but should not be construed the above-mentioned subject area of the utility model.In the situation that do not break away 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 in the utility model scope.
Referring to accompanying drawing: a kind of oil hydraulic-pump rotor in figure, comprise the internal rotor 1 and the external rotor 2 that are meshed, the profilogram of described internal rotor 1 and external rotor 2 is a pair of conjugate curve, and described internal rotor 1 has n external tooth, described external rotor 2 has n+1 internal tooth, and n is the natural number more than or equal to 3; When described internal rotor and external rotor were meshed, the centre distance of described inner and outer Rotator was a, a＞0.
In embodiment, any one profile of tooth in described external rotor 2 comprises three sections tangent circular arcs.
Further, the profilogram shape of described external rotor 2 any one profile of tooth meets the curve shape that following steps are made:
1) referring to Fig. 2 or Fig. 3, take Oc as the center of circle, respectively with t
1, t
2, t
3For radius is made circle Q
1, the circle Q
2, the circle Q
3, some O
b1, the some O
b2, the some O
b3Respectively described round Q
1, the circle Q
2, the circle Q
3On point, with described some O
b1Be the center of circle, t
t1For radius is made circle B
1, with described some O
b2Be the center of circle, t
t2For radius is made circle B
2, with described some O
b3Be the center of circle, t
t3For radius is made circle B
3Described round B
1Respectively with circle B
2And B
3Be inscribed within an E and put F;
2) take Oc as the center of circle, r
fFor radius is made circle Q;
3) adopt the circular arc I will justify B
2Q is smoothly connected with circle, described circular arc I and circle B
2Intersect at a G, intersect at a H with circle Q; Adopt the circular arc II will justify B
3Q is smoothly connected with circle, described circular arc II and circle B
2Intersect at a J, intersect at a K with circle Q;
4) the round B between retention point E and some F
1, keep circular arc I and circular arc II, the round B between retention point E and some G
2, the round B between retention point F and some J
3, remove the round Q between some H and some K.
Through above-mentioned steps, the upper remaining arc section of circle Q has consisted of external rotor 2 tooth root contouring curves; The round B that keeps
1Arc section consisted of the profilogram of external rotor 2 tooth top sections; And circular arc I, circular arc II, and the round B that remains
2, the circle B
3Arc section jointly consisted of the profilogram of external rotor 2 flanks parts.
In above-mentioned parameter: t
1＞(n+1) * a, t
2＞(n+1) * a, t
3＞(n+1) * a, t
t1＞t
t2, t
t1＞t
t3, t
2-t
t2＞t
1-t
t1, t
3-t
t3＞t
1-t
t1, t
t2＞t
t1-(t
1 2-((n+1) * is a)
2)
0.5+ (t
2 2-((n+1) * is a)
2)
0.5, t
t3＞t
t1-(t
1 2-((n+1) * is a)
2)
0.5+ (t
3 2-((n+1) * is a)
2)
0.5, r
f=t
1-t
t1+ 2*a+ δ, 0.5 〉=δ 〉=0.01.
Claims (3)
1. oil hydraulic-pump rotor, comprise the internal rotor (1) and the external rotor (2) that are meshed, the profilogram of described internal rotor (1) and external rotor (2) is a pair of conjugate curve, and described internal rotor (1) has n external tooth, described external rotor (2) has n+1 internal tooth, and n is the natural number more than or equal to 3; When described internal rotor and external rotor were meshed, the centre distance of described inner and outer Rotator was a, a＞0.
2. oil hydraulic-pump rotor according to claim 1, it is characterized in that: any one profile of tooth in described external rotor (2) comprises three sections tangent circular arcs.
3. oil hydraulic-pump rotor according to claim 1, it is characterized in that: the profilogram shape of any one profile of tooth of described external rotor (2) meets the curve shape that following steps are made:
1) take Oc as the center of circle, respectively with t
1, t
2, t
3For radius is made circle Q
1, the circle Q
2, the circle Q
3, some O
b1, the some O
b2, the some O
b3Respectively described round Q
1, the circle Q
2, the circle Q
3On point, with described some O
b1Be the center of circle, t
t1For radius is made circle B
1, with described some O
b2Be the center of circle, t
t2For radius is made circle B
2, with described some O
b3Be the center of circle, t
t3For radius is made circle B
3Described round B
1Respectively with circle B
2And B
3Be inscribed within an E and put F;
2) take Oc as the center of circle, r
fFor radius is made circle Q;
3) adopt the circular arc I will justify B
2Q is smoothly connected with circle, described circular arc I and circle B
2Intersect at a G, intersect at a H with circle Q; Adopt the circular arc II will justify B
3Q is smoothly connected with circle, described circular arc II and circle B
2Intersect at a J, intersect at a K with circle Q;
4) the round B between retention point E and some F
1, keep circular arc I and circular arc II, the round B between retention point E and some G
2, the round B between retention point F and some J
3, remove the round Q between some H and some K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220609218 CN202946377U (en) | 2012-11-19 | 2012-11-19 | Oil pump rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220609218 CN202946377U (en) | 2012-11-19 | 2012-11-19 | Oil pump rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202946377U true CN202946377U (en) | 2013-05-22 |
Family
ID=48422084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220609218 Expired - Lifetime CN202946377U (en) | 2012-11-19 | 2012-11-19 | Oil pump rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202946377U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822540A (en) * | 2016-04-28 | 2016-08-03 | 浙江工业大学 | Cycloid rotor pump with unsmooth surfaces |
-
2012
- 2012-11-19 CN CN 201220609218 patent/CN202946377U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822540A (en) * | 2016-04-28 | 2016-08-03 | 浙江工业大学 | Cycloid rotor pump with unsmooth surfaces |
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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: 20130522 |