CN110823503B - Propeller blade angle protractor - Google Patents
Propeller blade angle protractor Download PDFInfo
- Publication number
- CN110823503B CN110823503B CN201911213498.9A CN201911213498A CN110823503B CN 110823503 B CN110823503 B CN 110823503B CN 201911213498 A CN201911213498 A CN 201911213498A CN 110823503 B CN110823503 B CN 110823503B
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- Prior art keywords
- blade
- pointer
- angle
- propeller
- sleeve
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The invention discloses a propeller blade angle protractor, which comprises a base, wherein angle scale lines are arranged on the base; the support columns are arranged on two sides of the angle scale mark on the base; the blade shaft is horizontally arranged on the supporting column; the pointer disc is concentric with the angle scale mark, is arranged on the base and can rotate relative to the base; the pointer is arranged on the pointer disc and rotates along with the pointer disc, and an extension line of the pointer indicating direction penetrates through the circle center of the pointer disc; the blade seat is arranged on the pointer disc and rotates along with the pointer disc; the blade is sleeved on the blade seat and rotates along with the blade seat; the blade sleeve part forms the inner space of the blade sleeve, and the inner space of the blade sleeve is matched with the propeller blade to be measured; the chord line at the position of 70% of the rotation radius of the propeller blade to be measured is parallel or vertical to the chord line of the outer surface of the blade sleeve, and the 0-degree scale line on the degree scale line is vertical to the blade shaft. The propeller blade angle protractor can measure and adjust the blade angle of the propeller blade.
Description
Technical Field
The invention relates to a propeller blade angle protractor, and belongs to the technical field of wind tunnel test measurement.
Background
When a propeller-driven wind tunnel test is carried out, the blade angle of a propeller blade is the most main factor influencing the performance of the propeller. The blade angle is the angle between the chord line of the propeller blade and the plane of rotation of the propeller, and is customarily the nominal value of the blade angle at a radius of 70%. Therefore, the blade angle after blade installation needs to be accurately measured and adjusted before the test starts. Meanwhile, in order to improve the test efficiency, the measurement process is required to be rapid and reliable.
Disclosure of Invention
The invention aims to: aiming at the existing problems, the invention provides a propeller blade angle protractor which is used for measuring and adjusting the blade angle of a propeller blade.
The technical scheme adopted by the invention is as follows:
the propeller blade angle protractor comprises a base, wherein angle scale lines are arranged on the base;
the supporting columns are arranged on two sides of the angle scale mark on the base;
the blade shaft is horizontally arranged on the support column and used for placing the propeller blade to be tested;
the pointer disc is concentric with the angle scale mark, is arranged on the base and can rotate relative to the base;
the pointer is arranged on the pointer disc and rotates along with the pointer disc, and an extension line of the indicating direction of the pointer penetrates through the circle center of the pointer disc and is used for pointing to a corresponding angle of the angle scale mark;
the blade seat is arranged on the pointer disc and rotates along with the pointer disc;
the blade sleeve is formed by combining two blade sleeve parts, is arranged on the blade seat and rotates along with the blade seat; the blade sleeve part forms the inner space of the blade sleeve, and the inner space of the blade sleeve is matched with the propeller blade to be measured;
the chord line at the position of 70% of the rotation radius of the propeller blade to be measured is parallel or vertical to the chord line of the outer surface of the blade sleeve, the indication direction of the pointer is parallel or vertical to the chord line of the outer surface of the blade sleeve, and the 0-degree scale line on the degree scale line is vertical to the blade shaft.
In the invention, the propeller blade to be tested is inserted into the blade sleeve, the inner space of the blade sleeve is matched with the propeller blade to be tested, and the included angle between the vertical plane of the chord line at the position of 70% of the rotation radius of the propeller blade to be tested and the rotation plane of the propeller is the propeller blade angle; the indication direction of the pointer is parallel to the vertical direction plane, and the vertical plane perpendicular to the blade shaft is the rotating plane of the propeller (namely the vertical plane where the 0-degree scale mark is located), so that the pointed angle of the pointer is the blade angle.
In the scheme, the angle scale lines are round angle scale lines, the 0 angle scale line is vertical to the blade shaft, and the angle range and the minimum scale are determined according to the test requirement; the propeller blade subassembly that awaits measuring is placed on the device through the blade axle, and the rotation axis and the coincidence of blade axle axis of the propeller blade that awaits measuring, the propeller blade subassembly that awaits measuring can slide on the blade axle.
Preferably, a support column interface is arranged on the base, and the support column is installed on the support column interface.
Preferably, the supporting column is provided with a groove.
Preferably, the groove is a fork-shaped groove.
In the scheme, the depth of the grooves on the supporting columns is consistent, so that the blade shafts can be horizontally placed on the supporting columns.
Preferably, the two blade sleeve parts are inserted in a clearance fit manner, and a combination line of the two blade sleeve parts is a propeller blade contour line.
Preferably, the blade sleeve is inserted into the blade seat in a clearance fit manner.
Preferably, a pointer disc mounting interface is arranged on the base, and the pointer disc mounting interface is in clearance fit with the pointer disc.
In the scheme, the structure is simple through clearance fit, and the disassembly and assembly are convenient.
Preferably, a circle of positioning holes are formed in the pointer disc mounting interface.
Preferably, the pointer disc is provided with an arc-shaped groove with the same radius as the positioning hole.
In the above scheme, when the blade angle is adjusted through the positioning hole and the arc-shaped groove, the position of the base of the pointer plate is fixed through the screw after the required angle is adjusted, so that the position of the propeller blade is locked, and the blade angle of the propeller blade is conveniently adjusted.
Preferably, a cursor scale line is arranged on the edge of the pointer disc.
Preferably, the cursor scale line is located beside the pointer.
In the scheme, the vernier scale line is arranged, so that the reading of the angle can be more accurate, and the measurement accuracy is increased.
Preferably, the pointer and the blade sleeve are in clearance fit insertion connection.
Preferably, the pointer and the pointer disc are in clearance fit insertion connection.
Preferably, the upper end and the lower end of the blade seat are respectively provided with a blade sleeve mounting interface and a pointer disk mounting part which are in clearance fit with the blade sleeve and the pointer disk.
Preferably, the pointer plate is provided with a blade seat mounting part matched with the pointer plate mounting part.
Preferably, the size of the blade sleeve mounting interface is consistent with that of the bottom end of the blade sleeve.
Preferably, the pointer disc mounting part and the blade sleeve mounting interface are rectangular.
In the scheme, the structure is simple through clearance fit, and the disassembly and assembly are convenient.
Preferably, the projection line of the axis of the vane shaft on the base passes through the circle center of the dial.
When the propeller blade angle protractor is used for adjusting the propeller blade angle, firstly, a propeller blade assembly to be measured is inserted into a blade shaft, then, a blade sleeve wraps the propeller blade to be measured which is not fastened yet, then, the blade sleeve is inserted into a blade seat, the blade seat is rotated to the blade angle required by a test, the blade is fastened after the blade is confirmed to be correct, and the adjustment of the propeller blade angle is completed.
When the propeller blade angle protractor is used for measuring the propeller blade angle, firstly, a propeller blade assembly to be measured is inserted into a blade shaft, then, a blade sleeve wraps the propeller blade to be measured, a blade base is rotated to an angle matched with a blade base mounting interface on the blade sleeve, the blade sleeve is inserted into the blade base, and at the moment, the angle pointed by a pointer is the propeller blade angle.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the structure design is simple, the disassembly is convenient, and the requirements on the use field and the environment are not required;
2. the propeller blade to be measured is tightly attached to the blade sleeve, so that the accuracy of blade angle measurement is ensured;
3. the practicality is stronger, can fix a position, accurate adjustment and measure the paddle angle fast to the propeller blade.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of a blade angle protractor configuration;
FIG. 2 is a schematic top view of the base;
FIG. 3 is a schematic cross-sectional side view of the base;
FIG. 4 is a schematic view of the construction of the dial;
FIG. 5 is a schematic view of a support post structure;
FIG. 6 is a schematic view of a vane carrier mechanism;
FIG. 7 is a schematic view of a vane sleeve configuration;
fig. 8 is an operational schematic diagram of the blade angle protractor.
The labels in the figure are: the device comprises a base 1, a pointer disc 2, a blade seat 3, a blade sleeve 4, a pointer 5, a supporting column 6, a blade shaft 7, a propeller blade assembly to be tested 8, a supporting column mounting interface 11, a pointer disc mounting interface 12, a positioning hole 13, an angle scale line 14, an arc-shaped groove 21, a vernier scale line 22, a blade seat mounting part 23, a pointer disc mounting part 31, a blade sleeve mounting interface 32, a blade sleeve part 41 and a blade sleeve inner space 42.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
As shown in fig. 1, the propeller blade angle protractor of the present embodiment includes a base 1, a pointer disc 2, a blade base 3, a blade sleeve 4, a pointer 5, a support column 6, and a blade shaft 7;
the base 1 is provided with a pointer disc mounting interface 12, a circle of positioning holes 13 are arranged in the pointer disc mounting interface 12, and an angle scale 14 concentric with the pointer disc mounting interface 12 is carved on the periphery of the pointer disc mounting interface 12; support column mounting interfaces 11 are further arranged at two ends of the base 1;
the pointer plate 2 is arranged in the pointer plate mounting interface 12, is in clearance fit with the pointer plate mounting interface, and can rotate relative to the base 1; the pointer disk 2 is provided with a blade seat installation part 23 and an arc-shaped groove 21 with the same radius as the positioning hole 13; a cursor scale line 22 is arranged beside the position of the pointer 5 on the pointer plate 2.
The pointer 5 is arranged on the pointer disc 2 and rotates along with the pointer disc 2, an extension line of the pointer 5 in the indicating direction penetrates through the circle center of the pointer disc 2, and the pointer 5, the pointer disc 2 and the blade seat 3 are in clearance fit insertion connection;
the lower end of the blade seat 3 is provided with a rectangular pointer disk mounting part 31 matched with the blade seat mounting part 23 and is inserted in a clearance fit manner; the top of the blade seat 3 is provided with a rectangular blade sleeve mounting interface 32 in clearance fit with the blade sleeve 4;
the blade sleeve 4 is formed by splicing two blade sleeve parts 41 in a clearance fit manner, a combination line of the two blade sleeve parts 41 is a propeller blade contour line and is spliced in a clearance fit manner with the blade sleeve mounting interface 32, the two blade sleeve parts 41 form a blade sleeve inner space 42, and the blade sleeve inner space 42 is matched with the propeller blade to be detected and is used for accommodating the propeller blade to be detected;
The chord line at the position of 70% of the rotation radius of the propeller blade to be measured is parallel or vertical to the chord line of the outer surface of the blade sleeve 4, the indication direction of the pointer 5 is parallel or vertical to the chord line of the outer surface of the blade sleeve 4, and the 0-degree scale line on the degree scale line 14 is vertical to the blade shaft 7.
When adjusting the propeller blade angle, this embodiment at first inserts the propeller blade subassembly that awaits measuring into the blade axle, then wraps the propeller blade that awaits measuring not yet fastened with the blade cover, inserts the blade cover again in the blade seat, and the blade angle of rotating blade seat to experimental requirement confirms the back fastening blade of no mistake, accomplishes the adjustment of propeller blade angle.
In the embodiment, when the blade angle of the propeller blade is measured, the propeller blade assembly to be measured is inserted into the blade shaft, then the propeller blade to be measured is wrapped by the blade sleeve, the blade base is rotated to an angle matched with the blade base installation interface on the blade base, the blade sleeve is inserted into the blade base, and the angle pointed by the pointer is the blade angle of the propeller blade.
In conclusion, the propeller blade angle protractor can accurately measure and adjust the blade angle of the propeller blade.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. A propeller blade angle protractor, characterized in that: the device comprises a base (1), wherein angle scale marks (14) are arranged on the base (1);
the supporting columns (6) are arranged on two sides of the angle scale mark (14) on the base (1);
a blade shaft (7) horizontally placed on the support column (6);
the pointer disc (2) is concentric with the angle scale mark (14), is arranged on the base (1) and can rotate relative to the base (1);
the pointer (5) is arranged on the pointer disc (2) and rotates along with the pointer disc (2), and an extension line of the indicating direction of the pointer (5) penetrates through the circle center of the pointer disc (2) and is used for pointing to a corresponding angle of the angle scale mark (14);
the blade seat (3) is arranged on the pointer disc (2) and rotates along with the pointer disc (2);
the blade sleeve (4) is formed by combining two blade sleeve parts (41), is arranged on the blade seat (3) and rotates along with the blade seat (3); the blade sleeve part (41) forms a blade sleeve inner space (42), and the blade sleeve inner space (42) is matched with the propeller blade to be measured;
the chord line at the position of 70% of the rotation radius of the propeller blade to be measured is parallel or vertical to the chord line of the outer surface of the blade sleeve (4), the indication direction of the pointer (5) is parallel or vertical to the chord line of the outer surface of the blade sleeve (4), and the 0-degree scale line on the degree scale line (14) is vertical to the blade shaft (7).
2. The propeller blade angle protractor of claim 1, wherein: the supporting column (6) is provided with a groove.
3. The propeller blade angle protractor of claim 1, wherein: the two blade sleeve parts (41) are inserted in a clearance fit mode, and a combination line of the two blade sleeve parts (41) is a propeller blade contour line.
4. The propeller blade angle protractor of claim 3, wherein: the blade sleeve (4) is in clearance fit insertion connection with the blade seat (3).
5. The propeller blade angle protractor of claim 1, wherein: a pointer disc mounting interface (12) is arranged on the base (1), and the pointer disc mounting interface (12) is in clearance fit with the pointer disc (2).
6. The propeller blade angle protractor of claim 5, wherein: a circle of positioning holes (13) are formed in the pointer disc mounting interface (12).
7. The propeller blade angle protractor of claim 6, wherein: the pointer disc (2) is provided with an arc-shaped groove (21) with the same radius as the positioning hole (13).
8. The propeller blade angle protractor of claim 1, wherein: and a cursor reticle (22) is arranged at the edge of the pointer disc (2).
9. The propeller blade angle protractor of claim 1, wherein: and the upper end and the lower end of the blade seat are respectively provided with a blade sleeve mounting interface (32) and a pointer disk mounting part (31) which are in clearance fit with the blade sleeve and the pointer disk.
10. The propeller blade angle protractor of claim 1, wherein: the projection line of the axis of the blade shaft (7) on the base (1) passes through the circle center of the dial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911213498.9A CN110823503B (en) | 2019-12-02 | 2019-12-02 | Propeller blade angle protractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911213498.9A CN110823503B (en) | 2019-12-02 | 2019-12-02 | Propeller blade angle protractor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110823503A CN110823503A (en) | 2020-02-21 |
| CN110823503B true CN110823503B (en) | 2021-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911213498.9A Expired - Fee Related CN110823503B (en) | 2019-12-02 | 2019-12-02 | Propeller blade angle protractor |
Country Status (1)
| Country | Link |
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| CN (1) | CN110823503B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111678706B (en) * | 2020-05-29 | 2022-04-01 | 中国航发南方工业有限公司 | Tool and method for checking function of propeller speed regulating mechanism |
| CN112556548A (en) * | 2020-12-12 | 2021-03-26 | 安徽卓尔航空科技有限公司 | Real-time measuring device for propeller blade angle |
| CN113375627A (en) * | 2021-07-26 | 2021-09-10 | 西安京东天鸿科技有限公司 | Blade angle measuring device |
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| CN110823503A (en) | 2020-02-21 |
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Granted publication date: 20210504 Termination date: 20211202 |