CN212007730U - Rotary cylinder model test device - Google Patents
Rotary cylinder model test device Download PDFInfo
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- CN212007730U CN212007730U CN202021042181.1U CN202021042181U CN212007730U CN 212007730 U CN212007730 U CN 212007730U CN 202021042181 U CN202021042181 U CN 202021042181U CN 212007730 U CN212007730 U CN 212007730U
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Abstract
The utility model relates to a rotary cylinder model test device, which comprises a supporting tower, wherein a cylinder is rotatably sleeved on the circumferential outer side of the supporting tower; a driver is fixedly installed in the supporting tower, the output end of the driver is provided with a rotating wheel, the circumferential edge of the rotating wheel extends out of the supporting tower, and the circumferential edge of the rotating wheel is attached to the inner wall surface of the cylinder; a rotating shaft is rotatably arranged at the upper part of the supporting tower, the upper end of the rotating shaft extends upwards out of the supporting tower, a turntable is arranged at the end head of the upper end of the rotating shaft, and the turntable is fixedly arranged on the inner wall surface of the cylinder in the circumferential direction; a force balance is arranged on the bottom surface of the supporting tower; when the device is used, the testing device is arranged on a wind tunnel testing ground through a force balance, a short cylinder is arranged above the cylinder through a fastener to obtain a rotating cylinder with a preset length-diameter ratio, a driver drives a rotating wheel to rotate, the rotating wheel drives the cylinder attached to the rotating wheel to rotate through the friction force of the circumferential surface, the rotating cylinder integrally rotates, so that the rotating torque is measured through a torque meter, and the lift resistance is measured through the force balance; the utility model is used for rotatory cylinder model test rotates reliably stably, has ensured experimental effect effectively.
Description
Technical Field
The utility model belongs to the technical field of rotatory cylinder test equipment technique and specifically relates to a rotatory cylinder model test device.
Background
The model test method is one of main technical means for evaluating the aerodynamic characteristics of equipment, and the rotary cylinder turbulent flow is a model test with higher difficulty. The existing rotating cylinder turbulence tests are all used for simulating a rotating cylinder in an ideal state, the rotating cylinder is suspended in the air for testing, the test rotating speed is low, and the high rotating speed is difficult to achieve.
A wind power boosting rotor for a ship is a device for providing boosting force for ship navigation by utilizing wind energy through a rotating cylinder so as to realize energy conservation and emission reduction of the ship, and actually is a cantilever structure with one end fixed on a deck. The marine wind power boosting rotor in the use process is influenced by an atmospheric boundary layer, and is greatly different from the fluid state of a rotating cylinder in the existing rotating cylinder turbulent flow model test. On the other hand, in order to ensure that the model test result of the rotating cylinder is actually fitted and can be used in engineering practice, it is necessary to ensure that the reynolds number Re of the rotor, i.e., the rotating cylinder, satisfies a critical condition, i.e., the test wind speed is not less than a critical value, and the surface speed of the rotor also has a critical value under the condition that the test rotating speed ratio (the ratio of the surface linear speed of the rotor to the wind speed) is fixed. Therefore, the smaller the radius of the rotor model is, the higher the required test rotation speed is, and the existing test device is difficult to meet the requirement of the rotation speed due to the structural limitation of the test device.
SUMMERY OF THE UTILITY MODEL
The applicant provides a rotating cylinder model test device with a reasonable structure aiming at the defects in the prior art, so that the requirement on the rotating speed during the rotating cylinder test is met, the rotation is stable and reliable, and the test effect is effectively guaranteed.
The utility model discloses the technical scheme who adopts as follows:
a rotary cylinder model test device comprises a supporting tower, wherein a cylinder is rotatably sleeved on the circumferential outer side of the supporting tower; a driver is fixedly arranged in the supporting tower, the output end of the driver is provided with a rotating wheel, the circumferential edge of the rotating wheel extends out of the supporting tower, and the circumferential edge of the rotating wheel is attached to or meshed with the inner wall surface of the cylinder; a rotating shaft is rotatably arranged at the upper part of the supporting tower, the upper end of the rotating shaft extends upwards out of the supporting tower, a turntable is arranged at the end head of the upper end of the rotating shaft, and the turntable is fixedly arranged on the inner wall surface of the cylinder in the circumferential direction; and a powerful balance is arranged on the bottom surface of the supporting tower.
As a further improvement of the above technical solution:
the supporting tower is accommodated in the cylinder, and a gap is formed between the outer circumferential surface of the supporting tower and the inner wall surface of the cylinder; a large bearing or ball mechanism is arranged between the lower part of the circumferential surface of the supporting tower and the cylinder.
A base extends from the bottom of the supporting tower to the circumferential direction, and the diameter of the base is larger than that of the supporting tower and the diameter of the cylinder;
the structure of the ball mechanism is as follows: the support is circumferentially arranged along the lower edge of the outer circumferential surface of the cylinder, and a plurality of balls are circumferentially arranged between the support and the support tower; the balls are clamped with corresponding holes on the bracket, and the single ball rotates relative to the bracket; the ball outside the support is attached to the joint of the support tower and the base, and the ball is simultaneously contacted with the lower part of the outer wall surface of the support tower and the upper surface of the base.
And the bottom surface of the support tower is provided with a force balance, and the support tower is fixedly arranged on the ground of an external wind tunnel laboratory through the force balance.
A torque meter is fixedly arranged on the rotating shaft between the top surface of the supporting tower and the turntable; the axial direction of the rotating wheel is parallel to the axial direction of the cylinder.
The cylinder above the turntable is sequentially provided with a plurality of short cylinders, and the cylinder and the short cylinders jointly form a rotating cylinder.
The short cylinders are sequentially upwards connected and installed along the axial direction of the cylinders; the cylinders are connected with the short cylinders and the adjacent short cylinders through fasteners.
The turntable is located at 1/2-3/4 of the height of the rotating cylinder.
The top of the supporting tower is of a circular jar structure, and a rotating shaft is rotatably arranged along the axis of the circular jar structure; and a bearing is arranged between the rotating shaft and the circular jar structure.
The rotary shaft is characterized in that a sleeve is installed between the circular jar structure and the rotary shaft, the outer wall surface of the sleeve is fixedly installed on the circular jar structure, the sleeve is sleeved on the outer side of the circumferential surface of the rotary shaft, and bearings are installed between the hole openings at two ends of the sleeve and the rotary shaft.
The utility model has the advantages as follows:
the utility model has the advantages of being compact and reasonable in structure, convenient operation supports it from the drum is inside through the support tower to set up driver and runner and drive the drum and rotate inside the support tower, thereby obtain high-speed, stable rotation, realize the rotatory cylinder model test, effectively promoted rotatory cylinder rigidity, greatly the helping hand is reliable and stable in its pivoted, and ensured experimental effect forcefully.
The utility model discloses still include following advantage:
the bottom of the cylinder is supported with the support tower through a large bearing or a ball mechanism, and the upper part of the cylinder is supported through a turntable, so that a two-point simple support structure in the axial direction of the cylinder is formed, and the rotation stability of the rotating cylinder is effectively guaranteed; the large bearing or ball mechanism and the turntable are connected with the cylinder from the circumferential direction and supported, so that the rotating concentricity of the rotating cylinder is effectively ensured;
the top of the cylinder is sequentially provided with a plurality of short cylinders along the axial direction through fasteners to form a rotating cylinder, and the height of the rotating cylinder is rapidly changed through a detachable short cylinder structure, so that the flexibility is good, the rotating cylinder is suitable for tests with different length-diameter ratio requirements, the replacement time is shortened, and the test cost is reduced;
the cylinder is driven to rotate by adopting a built-in driver, so that the length of the rotating shaft is skillfully reduced, and the whole structure is more compact and reasonable; the driver is arranged at the middle position in the supporting tower, and can be arranged at the bottom surface in the supporting tower when the driver is large and heavy.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged view of a portion a in fig. 1.
Fig. 3 is a partially enlarged view of a portion B in fig. 1.
Wherein: 1. a support tower; 2. a rotating wheel; 3. a driver; 4. a force balance; 5. a rotating shaft; 6. a turntable; 7. a cylinder; 8. a support; 9. a ball bearing; 10. a torque meter; 11. a base; 12. a sleeve; 13. a bearing; 14. a fastener.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, the rotating cylinder model test device of the present embodiment includes a support tower 1, and a cylinder 7 is rotatably sleeved on the circumferential outer side of the support tower 1; a driver 3 is fixedly arranged in the supporting tower 1, the output end of the driver 3 is provided with a rotating wheel 2, the circumferential edge of the rotating wheel 2 extends out of the supporting tower 1, and the circumferential edge of the rotating wheel 2 is attached to or meshed with the inner wall surface of the cylinder 7; a rotating shaft 5 is rotatably arranged at the upper part of the supporting tower 1, the upper end of the rotating shaft 5 extends upwards out of the supporting tower 1, a turntable 6 is arranged at the end head of the upper end of the rotating shaft 5, and the turntable 6 is fixedly arranged on the inner wall surface of the cylinder 7 in the circumferential direction; a powerful balance 4 is arranged on the bottom surface of the support tower 1; support it from drum 7 inside through supporting tower 1 to set up driver 3 and runner 2 and drive drum 7 and rotate in supporting tower 1 is inside, thereby obtain high-speed, stable rotation, realize the rotatory cylinder model test, effectively promoted rotatory cylinder rigidity, greatly the helping hand is reliable and stable in its pivoted, and ensured experimental effect forcefully.
The circumferential edge of the rotating wheel 2 is attached to the inner wall surface of the cylinder 7, and the rotating wheel 2 drives the cylinder 7 to rotate through friction transmission under the drive of the driver 3; or the circumferential edge of the rotating wheel 2 is meshed with the inner wall surface of the cylinder 7, the circumferential edge of the rotating wheel 2 is provided with external teeth, the inner wall surface of the cylinder 7 is provided with internal teeth meshed with the external teeth, and the rotating wheel 2 is driven by the driver 3 to drive the cylinder 7 to rotate through meshing transmission.
A force balance 4 is arranged on the bottom surface of the support tower 1, and the support tower 1 is fixedly arranged on the ground of an external wind tunnel laboratory through the force balance 4.
A torque meter 10 is fixedly arranged on the rotating shaft 5 between the top surface of the supporting tower 1 and the turntable 6; the axial direction of the rotating wheel 2 is parallel to the axial direction of the cylinder 7; the cylinder 7 is driven to rotate by adopting a built-in driver 3, so that the length of the rotating shaft 5 is skillfully reduced, and the whole structure is more compact and reasonable; the driver 3 is disposed at an intermediate position inside the support tower 1, and may be disposed at the bottom surface inside the support tower 1 when the driver 3 is large and heavy.
A plurality of short cylinders are sequentially arranged on the cylinder 7 positioned above the turntable 6, and the cylinder 7 and the short cylinders jointly form a rotating cylinder; through the short drum structure of detachable, realize the quick change of rotatory cylinder height, the flexibility is good to be applicable to the experiment that different draw ratios required, reduce the repacking time, reduce testing cost.
The short cylinders are sequentially installed upwards in a connected mode along the axial direction of the cylinder 7; the cylinders 7 are connected with the short cylinders and the adjacent short cylinders by fasteners 14.
The rotary table 6 is positioned at 1/2-3/4 of the height of the rotary cylinder.
As shown in fig. 3, the top of the support tower 1 is of a circular jar structure, and a rotating shaft 5 is rotatably mounted along the axis of the circular jar structure; and a bearing 13 is arranged between the rotating shaft 5 and the circular jar structure.
A sleeve 12 is arranged between the round jar structure and the rotating shaft 5, the outer wall surface of the sleeve 12 is fixedly installed with the round jar structure, the sleeve 12 is sleeved outside the circumferential surface of the rotating shaft 5, and bearings 13 are arranged between the orifices at two ends of the sleeve 12 and the rotating shaft 5; the sleeve 12 and the arrangement of the bearings 13 at the two ends between the sleeve and the rotating shaft 5 effectively ensure the coaxiality of the rotating shaft 5 relative to the supporting tower 1, thereby ensuring the coaxiality of the rotating disc 6 above the rotating shaft 5 relative to the supporting tower 1, further helping to ensure the coaxiality of the cylinder 7 relative to the supporting tower 1, and ensuring the stable reliability of the rotation of the rotating cylinder.
The driver 3 is a motor, and the motor drives the rotating shaft 5 to rotate through a speed change device such as gear transmission.
The first embodiment is as follows:
the supporting tower 1 is accommodated in the cylinder 7, and a gap is formed between the outer circumferential surface of the supporting tower 1 and the inner wall surface of the cylinder 7; a large bearing is arranged between the lower part of the circumferential surface of the supporting tower 1 and the cylinder 7.
The large bearing is an angular contact ball bearing which is arranged between the inner wall surface of the cylinder 7 and the outer wall surface of the support tower 1; an outer ring of the angular contact ball bearing is fixedly mounted with the inner wall surface of the cylinder 7, and an inner ring of the angular contact ball bearing is fixedly mounted with the outer wall surface of the support tower 1; angular contact ball bearings provide circumferential restraint and fulcrum for the cylinder 7 relative to the support tower 1.
Example two:
the supporting tower 1 is accommodated in the cylinder 7, and a gap is formed between the outer circumferential surface of the supporting tower 1 and the inner wall surface of the cylinder 7; a large bearing is arranged between the lower part of the circumferential surface of the supporting tower 1 and the cylinder 7.
The bottom of the support tower 1 extends to the circumferential direction to form a base 11, and the diameter of the base 11 is larger than the diameters of the support tower 1 and the cylinder 7.
The large bearing is a thrust bearing which is arranged between the bottom surface of the cylinder 7 and the base 11 of the support tower 1; the upper ring of the thrust bearing is fixedly mounted with the bottom surface of the cylinder 7, and the lower ring of the thrust bearing is fixedly mounted with the upper surface of the base 11; the thrust bearing provides circumferential restraint and fulcrum for the cylinder 7 relative to the support tower 1.
Example three:
the supporting tower 1 is accommodated in the cylinder 7, and a gap is formed between the outer circumferential surface of the supporting tower 1 and the inner wall surface of the cylinder 7; a ball mechanism is arranged between the lower part of the circumferential surface of the support tower 1 and the cylinder 7.
A base 11 extends from the bottom of the support tower 1 to the circumferential direction, and the diameter of the base 11 is larger than that of the support tower 1 and the cylinder 7; as shown in fig. 2, the structure of the ball mechanism is: the support device comprises a support 8 which is circumferentially arranged along the lower edge of the outer circumferential surface of a cylinder 7, and a plurality of balls 9 are circumferentially arranged between the support 8 and the support tower 1; the balls 9 are clamped with corresponding holes on the bracket 8, and the single ball 9 rotates relative to the bracket 8; the ball 9 located outside the support 8 is attached to the joint of the support tower 1 and the base 11, the ball 9 is simultaneously contacted with the lower part of the outer wall surface of the support tower 1 and the upper surface of the base 11, and the plurality of balls 9 arranged in the circumferential direction provide axial and circumferential restraint for the cylinder 7 through the support 8.
The bottom of the cylinder 7 is supported with the support tower 1 through a large bearing or a ball mechanism, and the upper part of the cylinder 7 is supported through the turntable 6, so that a two-point simple support structure in the axial direction of the cylinder 7 is formed, and the rotation stability of the rotating cylinder is effectively guaranteed; and the large bearing or ball mechanism and the turntable 6 are connected with the cylinder 7 from the circumferential direction for supporting, so that the rotating concentricity of the rotating cylinder is effectively ensured.
The force balance 4 is also called a wind tunnel balance and is a measuring device used for measuring aerodynamic force and moment of airflow acting on the model in a wind tunnel; the device can decompose and accurately measure the air power and the moment along three mutually vertical coordinate axes; the utility model discloses in, force balance 4 chooses for use three component balance for outsourcing standard component, and the range is 500N. When the device is used, the aerodynamic force generated by the cylinder 7 in a wind field is transmitted to the support tower 1 through the two-point simple support structure and then transmitted to the force balance 4 through the support tower 1, so that the aerodynamic parameters of the rotating cylinder are measured through the force balance 4.
The utility model discloses a theory of operation does:
a plurality of short cylinders are sequentially arranged at the top of the cylinder 7 along the axial direction through fasteners 14, and a rotating cylinder with the required length-diameter ratio is obtained;
the bottom of the support tower 1 is fixedly arranged on the ground of an external wind tunnel laboratory through a force balance 4;
the driver 3 works to drive the rotating shaft 5 to rotate, the rotating shaft 5 drives the rotating shaft 5 to rotate together from the inside of the cylinder 7, and the rotating cylinder rotates; synchronously, the wind tunnel laboratory blows air;
the rotating cylinder generates a Magnus effect under the action of wind power incoming flow, so that a lift force perpendicular to the incoming flow direction is generated on the rotating cylinder;
the rising resistance and the torque of the rotating cylinder under different rotating speed ratios are measured by outputting the rotating speed through the fixed driver 3 and synchronously adjusting the blowing wind speed; then, the rising resistance and the torque of the rotating cylinder under different rotating speed ratios are measured by fixing the blowing wind speed and synchronously adjusting the output rotating speed of the driver 3, the rising resistance is measured by the force balance 4, and the torque is measured by the torque meter 10.
The utility model is simple in operation, convenient to use, reliable and stable rotation when having realized rotatory cylinder is experimental, it is experimental effectual.
The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made within the scope of the invention.
Claims (10)
1. The utility model provides a rotatory cylinder model test device which characterized in that: comprises a supporting tower (1), wherein a cylinder (7) is rotatably sleeved on the circumferential outer side of the supporting tower (1); a driver (3) is fixedly arranged in the supporting tower (1), the output end of the driver (3) is provided with a rotating wheel (2), the circumferential edge of the rotating wheel (2) extends out of the supporting tower (1), and the circumferential edge of the rotating wheel (2) is attached to or meshed with the inner wall surface of the cylinder (7); a rotating shaft (5) is rotatably mounted at the upper part of the supporting tower (1), the upper end of the rotating shaft (5) extends upwards out of the supporting tower (1), a turntable (6) is mounted at the end head of the upper end of the rotating shaft (5), and the turntable (6) is fixedly mounted on the inner wall surface of the cylinder (7) in the circumferential direction; a powerful balance (4) is arranged on the bottom surface of the supporting tower (1).
2. A rotary cylinder model test apparatus as defined in claim 1, wherein: the supporting tower (1) is accommodated in the cylinder (7), and a gap is formed between the outer circumferential surface of the supporting tower (1) and the inner wall surface of the cylinder (7); a large bearing or ball mechanism is arranged between the lower part of the circumferential surface of the supporting tower (1) and the cylinder (7).
3. A rotary cylinder model test apparatus as defined in claim 2, wherein: the bottom of the supporting tower (1) extends to the circumferential direction to form a base (11), and the diameter of the base (11) is larger than that of the supporting tower (1) and the diameter of the cylinder (7);
the structure of the ball mechanism is as follows: the device comprises a bracket (8) which is circumferentially arranged along the lower edge of the outer circumferential surface of a cylinder (7), and a plurality of balls (9) are circumferentially arranged between the bracket (8) and a support tower (1); the balls (9) are clamped with corresponding holes on the bracket (8), and the single ball (9) rotates relative to the bracket (8); the ball (9) positioned outside the bracket (8) is attached to the joint of the support tower (1) and the base (11), and the ball (9) is simultaneously contacted with the lower part of the outer wall surface of the support tower (1) and the upper surface of the base (11).
4. A rotary cylinder model test apparatus as defined in claim 1, wherein: a force balance (4) is installed on the bottom surface of the supporting tower (1), and the supporting tower (1) is fixedly installed on the ground of an external wind tunnel laboratory through the force balance (4).
5. A rotary cylinder model test apparatus as defined in claim 1, wherein: a torque meter (10) is fixedly arranged on the rotating shaft (5) positioned between the top surface of the supporting tower (1) and the turntable (6); the axial direction of the rotating wheel (2) is parallel to the axial direction of the cylinder (7).
6. A rotary cylinder model test apparatus as defined in claim 1, wherein: a plurality of short cylinders are sequentially arranged on the cylinder (7) positioned above the turntable (6), and the cylinder (7) and the short cylinders jointly form a rotating cylinder.
7. A rotary cylinder model test apparatus as defined in claim 6, wherein: the short cylinders are sequentially installed upwards in a connected mode along the axial direction of the cylinder (7); the cylinders (7) are connected with the short cylinders and the adjacent short cylinders through fasteners (14).
8. A rotary cylinder model test apparatus as defined in claim 6, wherein: the rotary table (6) is located at 1/2-3/4 of the height of the rotary cylinder.
9. A rotary cylinder model test apparatus as defined in claim 1, wherein: the top of the supporting tower (1) is of a circular jar structure, and a rotating shaft (5) is rotatably mounted along the axis of the circular jar structure; and a bearing (13) is arranged between the rotating shaft (5) and the circular jar structure.
10. A rotary cylinder model test apparatus as defined in claim 9, wherein: install sleeve (12) between jar structure and pivot (5), sleeve (12) outer wall face is adorned with jar structure admittedly, and pivot (5) periphery outside is located to sleeve (12) cover, all installs bearing (13) between sleeve (12) both ends orifice department and pivot (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021042181.1U CN212007730U (en) | 2020-06-08 | 2020-06-08 | Rotary cylinder model test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021042181.1U CN212007730U (en) | 2020-06-08 | 2020-06-08 | Rotary cylinder model test device |
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| Publication Number | Publication Date |
|---|---|
| CN212007730U true CN212007730U (en) | 2020-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021042181.1U Active CN212007730U (en) | 2020-06-08 | 2020-06-08 | Rotary cylinder model test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111521371A (en) * | 2020-06-08 | 2020-08-11 | 中国船舶科学研究中心 | Rotary cylinder model test device |
| CN111521371B (en) * | 2020-06-08 | 2024-06-21 | 中国船舶科学研究中心 | Rotary cylinder model test device |
-
2020
- 2020-06-08 CN CN202021042181.1U patent/CN212007730U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111521371A (en) * | 2020-06-08 | 2020-08-11 | 中国船舶科学研究中心 | Rotary cylinder model test device |
| CN111521371B (en) * | 2020-06-08 | 2024-06-21 | 中国船舶科学研究中心 | Rotary cylinder model test device |
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