CN112615448B - An asymmetric main rotor with an inclined surface - Google Patents
An asymmetric main rotor with an inclined surface Download PDFInfo
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- CN112615448B CN112615448B CN202011538835.4A CN202011538835A CN112615448B CN 112615448 B CN112615448 B CN 112615448B CN 202011538835 A CN202011538835 A CN 202011538835A CN 112615448 B CN112615448 B CN 112615448B
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- side curve
- fixed end
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- tooth
- impeller
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Supercharger (AREA)
Abstract
一种带斜面不对称主转子，包括转子轴、转子轴心、叶轮和齿尖，其特征在于；分别设置于所述上叶轮和所述下叶轮上的斜面，所述斜面的上端起始于齿尖，斜面的下端终结为一曲线，所述曲线一侧始于齿顶第一外侧曲线和齿顶第二外侧曲线之间，另一侧终于齿顶第二内侧曲线和齿顶第三内侧曲线之间，斜面靠近所述转子轴的一侧高于远离转子轴的一侧；上叶轮与所述下叶轮以所述转子轴心为原点中心对称并相互连接，通过在叶轮非固定端侧面设置斜面，使得转子在高温、高速运转过程中，避免因材料热膨胀而产生机械结构干涉的问题。
An asymmetric main rotor with an inclined surface, comprising a rotor shaft, a rotor axis, an impeller and a tooth tip, characterized in that: the inclined surfaces are respectively arranged on the upper impeller and the lower impeller, the upper end of the inclined surface starts at the tooth tip, and the lower end of the inclined surface ends in a curve, one side of the curve starts between the first outer curve of the tooth top and the second outer curve of the tooth top, and the other side ends between the second inner curve of the tooth top and the third inner curve of the tooth top, and the side of the inclined surface close to the rotor shaft is higher than the side away from the rotor shaft; the upper impeller and the lower impeller are symmetrical with the rotor axis as the origin and are connected to each other, and by arranging the inclined surface on the side of the non-fixed end of the impeller, the problem of mechanical structure interference caused by thermal expansion of the material is avoided during high temperature and high speed operation of the rotor.
Description
Technical Field
The invention relates to the field of air compressors, in particular to an asymmetric main rotor with an inclined plane.
Background
Roots blower is a driven fluid machine that lifts low pressure gas to high pressure gas, and the principle is a rotary compressor that utilizes two lobed rotors to move relatively within a cylinder to compress and transport gas.
Roots blower has a high internal temperature during long-term high-speed operation. The compressor rotor generally undergoes thermal expansion during high temperature, high speed operation, so that the rotor size changes, and further interferes with other mechanical structures in the working chamber, thereby increasing the wear speed of the rotor and the failure rate of the compressor.
SUMMARY OF THE PATENT FOR INVENTION
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
an asymmetric main rotor with inclined planes comprises a rotor shaft, a rotor axle center, an impeller and tooth tips,
The right side surface of the impeller consists of an upper impeller and a lower impeller;
the outer contour of the upper impeller consists of 13 sections of curves, namely a tooth root outer side curve, a tooth top first outer side curve, a tooth top second outer side curve, a tooth top third outer side curve, a tooth top fourth outer side curve, a tooth top first inner side curve, a tooth top second inner side curve, a tooth root third inner side curve, a tooth root first inner side curve, a tooth root second inner side curve, a tooth root third inner side curve, a tooth root fourth inner side curve and a tooth root fifth inner side curve;
the tooth root outer side curve, the tooth top first outer side curve, the tooth top second outer side curve, the tooth top third outer side curve and the tooth top fourth outer side curve are sequentially and smoothly connected;
The first inner side curve of the tooth top, the second inner side curve of the tooth top, the third inner side curve of the tooth top, the first inner side curve of the tooth root, the second inner side curve of the tooth root, the third inner side curve of the tooth root, the fourth inner side curve of the tooth root and the fifth inner side curve of the tooth root are also sequentially and smoothly connected;
One end of a fourth outer side curve of the tooth top is not smoothly connected with one end of a first inner side curve of the tooth top, the tooth tip is a connecting angle, and the connecting angle is an acute angle;
The upper end of the inclined surface starts from the tooth tip, the lower end of the inclined surface ends to form an inclined surface curve, one side of the inclined surface curve starts between the first outer side curve of the tooth top and the second outer side curve of the tooth top, the other side of the inclined surface curve ends between the second inner side curve of the tooth top and the third inner side curve of the tooth top, and one side of the inclined surface close to the rotor shaft is higher than one side far away from the rotor shaft;
the upper impeller and the lower impeller are symmetrical and connected with each other by taking the axis of the rotor as an origin.
In a preferred embodiment of the invention, the lower end of the bevel is in smooth connection with the abutment surface.
In a preferred embodiment of the present invention, the rotor shaft is a shaft body with a circular cross section, the left end of the shaft body is a fixed end, the right end of the shaft body is a non-fixed end, and the radius of the circular cross section of the left end and the right end of the shaft body is smaller than the radius of the circular cross section of the middle.
In a preferred embodiment of the present invention, the rotor shaft is provided with a fixed end step and an impeller first step in the direction from the fixed end to the impeller in order, and is provided with a non-fixed end first step, a non-fixed end second step and an impeller second step in the direction from the non-fixed end to the impeller in order.
In a preferred embodiment of the present invention, the fixed end and the fixed end step are in a chamfer form, the fixed end step and the impeller first step are in a chamfer form, the non-fixed end and the non-fixed end first step are in a chamfer form, and the non-fixed end first step, the non-fixed end second step and the impeller second step are all in a chamfer form.
In a preferred embodiment of the present invention, a fixed end groove is provided on a side wall of the fixed end, and a non-fixed end first groove is provided on a side wall of the non-fixed end, and the non-fixed end first groove is arranged across between the non-fixed end first step and the non-fixed end second step.
The invention has the beneficial effects that:
According to the asymmetric main rotor with the inclined plane, the inclined plane is arranged on the side face of the non-fixed end of the impeller, so that the problem of mechanical structure interference caused by thermal expansion of materials is avoided in the high-temperature and high-speed operation process of the rotor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a perspective view of the present invention.
Fig. 2 is a rear view of the present invention.
Fig. 3 is a right side view of the present invention.
Fig. 4 is a front view of the present invention.
Fig. 5 is an enlarged view of a portion of the ramp structure of the present invention.
Detailed Description
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are directions or positional relationships based on the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The detailed structure of the present invention is further described below with reference to the accompanying drawings and detailed description.
Referring to fig. 3, the right side surface of the impeller 1 is composed of an upper impeller 10 and a lower impeller 20, and the upper impeller 10 and the lower impeller 20 are centered symmetrically about a rotor shaft center 43 as an origin. The upper impeller 10 is composed of 13 sections of curves, namely a tooth root outer side curve 15 with a curvature center at the inner side, a tooth top first outer side curve 14 with a curvature center at the outer side, a tooth top second outer side curve 13 with a curvature center at the inner side, a tooth top third outer side curve 12 with a curvature center at the inner side, a tooth top fourth outer side curve 11 with a curvature center at the inner side, a tooth top first inner side curve 21 with a curvature center at the inner side, a tooth top second inner side curve 22 with a curvature center at the inner side, a tooth top third inner side curve 23 with a curvature center at the inner side, a tooth root first inner side curve 24 with a curvature center at the outer side, a tooth root second inner side curve 25 with a curvature center at the outer side, a tooth root third inner side curve 26 with a curvature center at the outer side, a tooth root fourth inner side curve 27 with a curvature center at the outer side, and a tooth root fifth inner side curve 28 with a curvature center at the outer side.
The tooth root outer side curve 15, the tooth root first outer side curve 14, the tooth root second outer side curve 13, the tooth root third outer side curve 12 and the tooth root fourth outer side curve 11 are sequentially and smoothly connected, the tooth root first inner side curve 21, the tooth root second inner side curve 22, the tooth root third inner side curve 23, the tooth root first inner side curve 24, the tooth root second inner side curve 25, the tooth root third inner side curve 26, the tooth root fourth inner side curve 27 and the tooth root fifth inner side curve 28 are sequentially and smoothly connected, one end of the tooth root fourth outer side curve 11 is not smoothly connected with one end of the tooth root first inner side curve 21, the connecting position is a tooth tip 10a, and the connecting angle is an acute angle.
The right side surface formed by the upper impeller 10 and the lower impeller 20 moves vertically and linearly along the rotor shaft 4, thereby forming the whole impeller 1.
Referring to fig. 1,4 and 5, the rotor is thermally expanded by the influence of temperature during high-temperature, high-speed operation of the impeller 1. Of these, the thermal deformation of the tooth tip 10a is greatest. For this purpose, on the right side surface of the impeller 1 far from the fixed end 41, inclined surfaces 31a are respectively provided, the upper ends of the inclined surfaces 31a start from the tooth tip 10a, the lower ends of the inclined surfaces 31a end from an inclined surface curve, one side of the inclined surface curve starts between the tooth top first outer side curve 14 and the tooth top second outer side curve 13, the other side of the inclined surface curve ends between the tooth top second inner side curve 22 and the tooth top third inner side curve 23, the lower ends of the inclined surfaces 31a are in smooth connection with the adjacent surfaces, and one side of the inclined surfaces 31a close to the rotor shaft 4 is higher than one side far from the rotor shaft 4, so that a space is reserved for material expansion, interference caused by thermal expansion is avoided, and the inclined surfaces are not provided on the left side surface of the impeller 1, so that the sealing performance in the working cavity is ensured to the maximum extent.
The rotor shaft 4 is a shaft body with a circular cross section, and the radius of the cross section circle at the two ends is smaller than that of the middle cross section circle. The left end of the rotor shaft 4 is a fixed end 41, the right end is a non-fixed end 42, and the rotor shaft 4 is heated to expand and deform in the high-temperature and high-speed running process, so that a certain space allowance is reserved for thermal expansion, and mechanical mechanism interference is avoided.
An impeller 1 is also arranged in the middle of the rotor shaft 4. The rotor shaft 4 is provided with a fixed end step 41b and an impeller first step 41c in this order from the fixed end 41 toward the impeller 1, and the radius of the cross-sectional circle of the rotor shaft 4 tends to increase from the fixed end 41 toward the impeller 1 in synchronization with each other. The fixed end 41 and the fixed end step 41b are in transition in a chamfer angle mode, and the fixed end step 41b and the impeller first step 41c are in transition in a chamfer angle mode. Similarly, the rotor shaft 4 is sequentially provided with a first non-fixed end step 42c, a second non-fixed end step 42d and a second impeller step 42e from the non-fixed end 42 to the impeller 1, the radius of the cross section circle of the rotor shaft 4 also tends to increase from the non-fixed end 42 to the impeller 1, the first non-fixed end step 42c is in transition in a chamfer angle mode, and the first non-fixed end step 42c, the second non-fixed end step 42d and the second impeller step 42e are all in transition in a chamfer angle mode.
Referring to fig. 2 in combination, a fixing end groove 41a is also provided on the side wall of the fixing end 41, and the groove 41a can be used for fixing with the bearing/shaft sleeve. A first recess 42a is provided on the sidewall of the unfixed end 42, and a second recess 42b is provided across between the first step 42c and the second step 42 d.
Claims (6)
1. The utility model provides a take asymmetric main rotor of inclined plane, includes rotor shaft, rotor axle center, impeller and tooth point, its characterized in that:
The right side surface of the impeller consists of an upper impeller and a lower impeller;
The outer contour of the upper impeller consists of 13 sections of curves, namely a tooth root outer side curve, a tooth top first outer side curve, a tooth top second outer side curve, a tooth top third outer side curve, a tooth top fourth outer side curve, a tooth top first inner side curve, a tooth top second inner side curve, a tooth root third inner side curve, a tooth root first inner side curve, a tooth root second inner side curve, a tooth root third inner side curve, a tooth root fourth inner side curve and a tooth root fifth inner side curve;
the tooth root outer side curve, the tooth top first outer side curve, the tooth top second outer side curve, the tooth top third outer side curve and the tooth top fourth outer side curve are sequentially and smoothly connected;
The first inner side curve of the tooth top, the second inner side curve of the tooth top, the third inner side curve of the tooth top, the first inner side curve of the tooth root, the second inner side curve of the tooth root, the third inner side curve of the tooth root, the fourth inner side curve of the tooth root and the fifth inner side curve of the tooth root are also sequentially and smoothly connected;
One end of a fourth outer side curve of the tooth top is not smoothly connected with one end of a first inner side curve of the tooth top, the tooth tip is a connecting angle, and the connecting angle is an acute angle;
The upper end of the inclined surface starts from the tooth tip, the lower end of the inclined surface ends to form an inclined surface curve, one side of the inclined surface curve starts between the first outer side curve of the tooth top and the second outer side curve of the tooth top, the other side of the inclined surface curve ends between the second inner side curve of the tooth top and the third inner side curve of the tooth top, and one side of the inclined surface close to the rotor shaft is higher than one side far away from the rotor shaft;
the upper impeller and the lower impeller are symmetrical and connected with each other by taking the axis of the rotor as an origin.
2. A beveled asymmetric main rotor as recited in claim 1 wherein said beveled lower end is in smooth connection with the abutment surface.
3. The beveled asymmetric main rotor as recited in claim 1 wherein said rotor shaft is a shaft body having a circular cross-section, a left end of said shaft body being a fixed end, a right end of said shaft body being a non-fixed end, a radius of the cross-sectional circular shape of the left and right ends of said shaft body being smaller than a radius of the cross-sectional circular shape of the center.
4. The beveled asymmetric main rotor of claim 3 wherein said rotor shaft has a fixed end step and an impeller first step in sequence in a direction from said fixed end to said impeller and a non-fixed end first step, a non-fixed end second step and an impeller second step in sequence in a direction from said non-fixed end to said impeller.
5. The beveled asymmetric main rotor of claim 4 wherein said fixed end transitions with said fixed end step in a beveled angle, said fixed end transitions with said impeller first step in a beveled angle, said non-fixed end transitions with said non-fixed end first step in a beveled angle, and said non-fixed end first step, said non-fixed end second step and said impeller second step each transition in a beveled angle.
6. The beveled asymmetric main rotor of claim 4 wherein a fixed end recess is provided in a side wall of the fixed end, and a non-fixed end first recess is provided in a side wall of the non-fixed end, the non-fixed end first recess being disposed transversely between the non-fixed end first step and the non-fixed end second step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011538835.4A CN112615448B (en) | 2020-12-23 | 2020-12-23 | An asymmetric main rotor with an inclined surface |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011538835.4A CN112615448B (en) | 2020-12-23 | 2020-12-23 | An asymmetric main rotor with an inclined surface |
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| Publication Number | Publication Date |
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| CN112615448A CN112615448A (en) | 2021-04-06 |
| CN112615448B true CN112615448B (en) | 2025-03-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN214314768U (en) * | 2020-12-23 | 2021-09-28 | 汉纬尔机械(上海)有限公司 | Asymmetric main rotor with inclined plane |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4415176B2 (en) * | 2003-10-12 | 2010-02-17 | 義光 大川 | Induction motor having a ring-shaped stator coil |
| CN110242561B (en) * | 2019-07-24 | 2023-10-24 | 中国石油大学(华东) | High-flow screw rotor of double-screw pump and design method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN214314768U (en) * | 2020-12-23 | 2021-09-28 | 汉纬尔机械(上海)有限公司 | Asymmetric main rotor with inclined plane |
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