CN114112289A - Blade type rotating test piece rotating speed measuring device and measuring system and method thereof - Google Patents
Blade type rotating test piece rotating speed measuring device and measuring system and method thereof Download PDFInfo
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- CN114112289A CN114112289A CN202111199655.2A CN202111199655A CN114112289A CN 114112289 A CN114112289 A CN 114112289A CN 202111199655 A CN202111199655 A CN 202111199655A CN 114112289 A CN114112289 A CN 114112289A
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- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 238000004088 simulation Methods 0.000 claims description 29
- 230000009471 action Effects 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000007664 blowing Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000036544 posture Effects 0.000 description 3
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- G—PHYSICS
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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Abstract
The invention provides a blade type rotating test piece rotating speed measuring device and a measuring system and method thereof, which solve the problems that the existing rotating speed measuring device generates friction torque in the measuring process and the measured rotating speed data is distorted; the test period is long. The device comprises an attack angle adjusting mechanism, a rotating shaft mechanism and a rotating speed sensor; the attack angle adjusting mechanism comprises an attack angle adjusting bottom plate and an attack angle adjusting rotating plate arranged above the attack angle adjusting bottom plate; an articulated piece and an angle adjusting component are arranged between the attack angle adjusting bottom plate and the attack angle adjusting rotating plate, so that the inclination angle between the attack angle adjusting rotating plate and the attack angle adjusting bottom plate is adjusted; the rotating shaft mechanism comprises a rotating shaft mounting seat and a rotating shaft, the rotating shaft mounting seat is arranged on the attack angle adjusting rotating plate, the rotating shaft penetrates through the rotating shaft mounting seat through a bearing, and the front end of the rotating shaft extends out of the rotating shaft mounting seat; the rotating speed sensor comprises a gear coaxially arranged on the rotating shaft and a proximity switch arranged in the mounting seat and matched with the gear, and the proximity switch measures the number of teeth through which the gear passes to obtain the rotating speed of the rotating shaft.
Description
Technical Field
The invention belongs to the field of wind tunnel tests, and particularly relates to a rotating speed measuring device for a blade type rotating test piece in a wind tunnel test, and a system and a method for measuring friction torque of the measuring device under the action of axial thrust (under the action of blowing of a simulation test piece).
Background
In the wind tunnel test, the blade type rotating test piece blowing test is required to be carried out under different attack angle postures. The test piece is a rotating body, and the test piece can rotate along an axis at a certain speed under the action of wind power in the test process.
At present, the device for measuring the rotating speed of the test piece comprises a rotating shaft system and a rotating speed sensor which is coaxially connected to the rotating shaft system, wherein the rotating shaft system is coaxially connected with the test piece, and the rotating speed of the test piece is measured through the rotating speed sensor. In the process of measuring the rotating speed of the test piece, the measuring device can inevitably generate friction torque, and the rotating speed of the test piece is greatly influenced by the overlarge data of the friction torque, so that the measured rotating speed data is distorted. In addition, because the friction torque exists in the rotation process of the rotation speed sensor, extra friction torque can be introduced in the measurement process, so that the requirement of the friction torque is difficult to guarantee.
In addition, the current adjustment to different attack angles is mainly realized by replacing mounting frames at different angles, and each angle corresponds to one mounting frame, so that the processing cost is high, the replacement workload is large, the required time for a test is long, and the test period is prolonged.
Disclosure of Invention
The device aims to solve the problem that the existing blade type rotating test piece rotating speed measuring device generates friction torque in the measuring process, and the measured rotating speed data is distorted due to overlarge friction torque data; the invention provides a blade type rotating test piece rotating speed measuring device and a system and a method for measuring friction torque of the measuring device.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a vane type rotating speed measuring device for a rotating test piece is characterized in that: comprises an attack angle adjusting mechanism, a rotating shaft mechanism and a rotating speed sensor;
the attack angle adjusting mechanism comprises an attack angle adjusting bottom plate and an attack angle adjusting rotating plate arranged above the attack angle adjusting bottom plate; an articulated piece and an angle adjusting component are arranged between the attack angle adjusting bottom plate and the attack angle adjusting rotating plate, so that the inclination angle adjustment between the attack angle adjusting rotating plate and the attack angle adjusting bottom plate is realized;
the rotating shaft mechanism comprises a rotating shaft mounting seat and a rotating shaft, the rotating shaft mounting seat is arranged on the attack angle adjusting rotating plate, the rotating shaft penetrates through the rotating shaft mounting seat through a bearing, and the front end of the rotating shaft extends out of the rotating shaft mounting seat;
the rotating speed sensor comprises a gear coaxially arranged on the rotating shaft and a proximity switch which is arranged in the mounting seat and matched with the gear, and the proximity switch measures the number of teeth through which the gear passes to obtain the rotating speed of the rotating shaft.
Furthermore, the hinge is a hinge rotating shaft which is connected with the attack angle adjusting bottom plate and the attack angle adjusting rotating plate;
the inclination angle adjusting assembly comprises a fixing bolt and a positioning pin;
the upper surface of the attack angle adjusting bottom plate is provided with a connecting plate, the connecting plate is provided with a plurality of first positioning pin holes and arc-shaped long holes coaxial with the hinge rotating shaft, and the first positioning pin holes are circumferentially arranged by taking the axis of the hinge rotating shaft as the circle center;
the attack angle adjusting rotating plate is provided with a second positioning pin hole matched with the first positioning pin hole and a through hole matched with the circular arc strip hole, the positioning pin penetrates through the first positioning pin hole and the second positioning pin hole to realize the positioning of the attack angle adjusting rotating plate and the attack angle adjusting bottom plate, and the fixing bolt penetrates through the through hole and the circular arc strip hole to fix the attack angle adjusting bottom plate and the attack angle adjusting rotating plate.
Furthermore, the rotating shaft mounting seat comprises a hollow shell and end covers arranged at two ends of the hollow shell, axial limiting is realized at two ends of the bearing through a shaft shoulder and the end covers on the rotating shaft respectively, and a through hole for the rotating shaft to penetrate out is formed in each end cover.
Further, the bearings are a pair of angular contact bearings installed face to face, and the 2 angular contact bearings are respectively located at two end parts of the hollow shell.
Meanwhile, the invention provides a system for measuring the friction torque of the blade type rotating test piece rotating speed measuring device, which is characterized in that: the device comprises a simulation disc, a force sensor, a torque sensor and a motor;
the simulation disc and the force sensor are sequentially and coaxially arranged at the front end of the rotating shaft, and the force sensor is arranged close to the rotating shaft;
the torque sensor and the motor are sequentially and coaxially arranged at the rear end of the rotating shaft, the torque sensor is arranged close to the rotating shaft, and the motor is arranged on the attack angle adjusting rotating plate.
The invention also provides a method for measuring the friction torque of the blade type rotating test piece rotating speed measuring device, which is characterized in that the measuring system comprises the following steps:
1) the method comprises the steps that a simulation disc and a force sensor are installed at the front end of a rotating shaft mechanism, the force sensor is arranged close to the rotating shaft, then a measuring device is placed in a wind tunnel test section, the simulation disc is blown by airflow, and airflow parameters are adjusted until the aerodynamic force value acting on the simulation disc measured by the force sensor meets the simulation requirement;
2) the force sensor is removed, the torque sensor and the motor are installed at the rear end of the rotating shaft mechanism, the torque sensor is arranged close to the rotating shaft, and the motor is installed on the attack angle adjusting rotating plate;
3) under the action of aerodynamic force meeting the simulation requirement in the step 1), simultaneously, a motor drives a rotating shaft to rotate at the speed of 5-10 revolutions per second, torque data of a torque sensor and rotating speed data of a rotating speed sensor are collected, and torque data at the rotating speed are obtained, wherein the torque data are friction torque of a measuring device;
4) comparing the friction torque with a set threshold, if the friction torque is smaller than the set threshold, executing the step 5), if the friction torque is larger than or equal to the set threshold, replacing the rotating shaft and the bearing, and returning to the step 3) until the friction torque is smaller than the set threshold;
5) the simulation disc, the torque sensor and the motor are disassembled, the to-be-tested piece is coaxially installed at the front end of a rotating shaft of the rotating shaft mechanism and integrally arranged in a wind tunnel test section, an inclination angle between an attack angle adjusting rotating plate and an attack angle adjusting bottom plate of the attack angle adjusting mechanism is adjusted according to the posture requirement of an attack angle, a test is carried out under the action of aerodynamic force according with the working condition of the tested piece, and the rotating speed sensor measures the rotating speed of the tested piece.
Further, in the step 5), the to-be-tested piece is located in an equal Mach area of the wind tunnel.
Compared with the prior art, the invention has the advantages that:
1. the rotating speed sensor comprises the gear and the proximity switch matched with the gear, and the passing tooth number of the gear coaxial with the rotating shaft is measured through the proximity switch, so that the rotating speed of the rotating shaft is obtained, and the influence on the accuracy of rotating speed measurement caused by the fact that the friction torque generated by the rotating speed sensor is introduced when the rotating speed sensor is installed on the rotating shaft in the prior art is avoided.
2. The rotating shaft is arranged in the rotating shaft mounting seat through the pair of angular contact bearings arranged face to face, and the angular contact bearings can bear axial thrust generated by incoming flow conditions, so that the torque sensor is effectively protected from being damaged by the axial thrust; the problem that a common ball bearing is adopted, so that the rotating shaft mechanism cannot bear axial thrust, and the torque sensor is damaged due to the thrust when the torque is measured is avoided.
3. In order to improve the accuracy of the rotating speed data, the measuring device disclosed by the invention ensures smaller friction torque through the design of a rotating shaft mechanism; and through the measurement of the friction torque of the measuring device, the friction torque of the rotating shaft mechanism of the measuring device is controlled within a set threshold range, so that when the test piece is installed for rotating speed measurement, because the friction torque of the measuring device is within an error allowable range (lower than the threshold), the influence of the friction torque of the measuring device on a rotating speed measurement result can be ignored, and the accuracy of the rotating speed data of the test piece is higher.
4. Under the blowing action of a simulation test piece, under the condition that an axial thrust and rotating speed sensor exists, the friction torque of the rotating shaft is measured, and the friction torque is judged to obtain the detection of whether the rotating shaft mechanism is qualified or not; if the rotating shaft and the bearing are unqualified, the friction torque of the rotating shaft mechanism is reduced by reducing the specifications of the rotating shaft and the bearing until the friction torque is qualified, so that the friction torque of the measuring device is in a smaller range (the friction torque is smaller than a set threshold), and the error influence of the friction torque of the measuring device on the rotating speed measuring result is further avoided.
5. The existing axial thrust loading is contact loading (the contact is mechanical contact between a loading device and a loaded part, for example, a cylinder rod always props against a rotating shaft device when cylinder loading is carried out, and the rotating of the rotating shaft can generate friction torque with the cylinder rod), and redundant friction torque can be generated in the rotating process of the rotating shaft; the application uses aerodynamic force axial loading, does not have the contact between the solid, and gas-solid contact friction torque can be ignored, improves the measuring accuracy.
Drawings
FIG. 1 is a schematic structural diagram of a vane-type rotating test piece rotating speed measuring device according to the present invention;
FIG. 2 is a schematic structural diagram of a rotating shaft mechanism and a rotating speed sensor in the vane-type rotating test piece rotating speed measuring device of the present invention;
FIG. 3 is a schematic structural diagram of a gear in the vane-type rotation test piece rotation speed measuring device of the present invention;
FIG. 4 is a schematic structural diagram of an attack angle adjusting mechanism in the vane-type rotation speed measuring device for a test piece according to the present invention;
FIG. 5 is a schematic structural diagram I of the measuring system of the present invention (the simulation disc and the force sensor are installed at the front end of the rotating shaft of the vane type rotating test piece rotating speed measuring device);
FIG. 6 is a schematic structural diagram II of the measuring system of the present invention (the torque sensor and the motor are installed at the rear end of the rotating shaft of the vane type rotating test piece rotating speed measuring device);
FIG. 7 is a schematic structural diagram of the measuring method of the present invention, in which the force sensor is removed in step 2), and the torque sensor and the motor are installed at the rear end of the rotating shaft;
FIG. 8 is a schematic view of the integrated installation of the structure of FIG. 7 in a wind tunnel test section;
FIG. 9 is a schematic view of the installation state of the vane-type rotating test piece rotating speed measuring device and the test piece (and is placed in the wind tunnel test section);
wherein the reference numbers are as follows:
1-rotating shaft mechanism, 11-rotating shaft, 12-bearing, 13-rotating shaft mounting seat, 131-hollow shell, 132-end cover, 14-gear and 15-proximity switch;
2-an attack angle adjusting mechanism, 21-an attack angle adjusting bottom plate, 22-an attack angle adjusting rotating plate, 221-a second positioning pin hole, 222-a through hole and 23-a hinged rotating shaft;
24-connecting plate, 241-first positioning pin hole, 242-arc-shaped long hole, 25-fixing bolt and 26-positioning pin;
3-simulation disc, 4-force sensor, 5-torque sensor, 6-coupler, 7-motor, 8-torque sensor mounting bracket and 9-motor mounting bracket.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
As shown in FIG. 1, the invention relates to a device for measuring the rotating speed of a vane type rotating test piece, which comprises an attack angle adjusting mechanism 2, a rotating shaft mechanism 1 and a rotating speed sensor.
As shown in fig. 4, the attack angle adjusting mechanism 2 includes an attack angle adjusting base plate 21 and an attack angle adjusting rotating plate 22 disposed above the attack angle adjusting base plate 21, and a hinge member and an angle adjusting assembly are disposed between the attack angle adjusting base plate 21 and the attack angle adjusting rotating plate 22, so as to adjust the tilt angle between the attack angle adjusting rotating plate 22 and the attack angle adjusting base plate 21.
In this embodiment, the hinge member is a hinge shaft 23 connecting one end of the attack angle adjusting base plate 21 and one end of the attack angle adjusting rotating plate 22, two end portions of the hinge shaft 23 are connected with nuts, and the attack angle adjusting rotating plate 22 can rotate around the hinge shaft 23 relative to the attack angle adjusting base plate 21; the inclination angle adjusting assembly comprises a fixing bolt 25 and a positioning pin 26, the upper surface of the attack angle adjusting bottom plate 21 is provided with two connecting plates 24 which are arranged in parallel, a through groove is formed in the position, matched with the two connecting plates 24, of the attack angle adjusting rotating plate 22, the two connecting plates 24 penetrate through the through groove, the two connecting plates 24 are identical in structure, each connecting plate 24 is provided with a plurality of first positioning pin holes 241 and an arc-shaped long strip hole 242 which is coaxial with the hinge rotating shaft 23, the first positioning pin holes 241 are circumferentially arranged by taking the axis of the hinge rotating shaft 23 as the center of a circle, and the first positioning pin holes 241 are arranged at the positions of 0 degree, 15 degrees and 30 degrees in the embodiment; the side wall of the attack angle adjusting rotating plate 22 with the through groove is provided with a second positioning pin hole 221 matched with the first positioning pin hole 241 and a through hole 222 matched with the arc-shaped long strip hole 242, the positioning pin 26 penetrates through the first positioning pin hole 241 on the connecting plate 24 and the second positioning pin hole 221 on the attack angle adjusting rotating plate 22 to realize the positioning of the attack angle adjusting rotating plate 22 and the attack angle adjusting bottom plate 21, and the fixing bolt 25 penetrates through the through hole 222 and the arc-shaped long strip hole 242 to fix the attack angle adjusting bottom plate 21 and the attack angle adjusting rotating plate 22. By rotating the attack angle adjusting rotating plate 22, the second positioning pin hole 221 on the attack angle adjusting rotating plate is matched with the first positioning pin holes 241 at different positions, so that the inclination angle adjustment between the attack angle adjusting rotating plate 22 and the attack angle adjusting bottom plate 21 is realized.
As shown in fig. 2 and fig. 3, the rotating shaft mechanism 1 includes a rotating shaft mounting base 13 and a rotating shaft 11, the rotating shaft mounting base 13 is disposed on the attack angle adjusting rotating plate 22, the rotating shaft mounting base 13 includes a hollow housing 131 disposed on the attack angle adjusting rotating plate 22 and end covers 132 disposed at two ends of the hollow housing 131, the rotating shaft 11 is mounted in the hollow housing 131 through a bearing 12, the rotating shaft 11 can freely rotate in the hollow housing 131, the front end of the rotating shaft 11 extends out of the end cover 132 for coaxial connection with a test piece, and the rear end is disposed on the end cover 132, so that through holes for the rotating shaft 11 to pass through are disposed on both the end covers 132;
in this embodiment, the bearing 12 is a pair of angular contact bearings installed face to face, 2 angular contact bearings are respectively located at two ends of the hollow housing 131, two ends of the bearing 12 are respectively axially limited by a shoulder on the rotating shaft 11 and the end cap 132, and the axial positioning of the rotating shaft 11 is completed by limiting the bearing 12, the end cap 132 and the shoulder.
As shown in fig. 2, the rotation speed sensor includes a gear 14 disposed in a hollow housing 131 and coaxially disposed on the rotation shaft 11, and a proximity switch 15 disposed on the hollow housing 131 and cooperating with the gear 14, and the number of passing teeth of the gear 14 coaxial with the rotation shaft 11 is measured by the proximity switch 15, thereby obtaining the rotation speed of the rotation shaft 11.
Because the rotating shaft mechanism 1 can generate friction torque, the friction torque of the measuring device can affect the rotating speed of the tested piece, and in order to obtain effective rotating speed data of the tested piece, the friction torque of the rotating shaft 11 during rotation needs to be controlled within a range and must be smaller than a set threshold value. It is therefore necessary to measure the rotational friction torque of the above-mentioned test device and to ensure that this friction torque is sufficiently small.
In order to make the test effective, the present embodiment designs a measuring system, which simulates the rotating friction torque generated by the rotating shaft 11 of the test device under the blowing action of the test piece and measures the friction torque, and the measuring system comprises a simulation disc 3, a force sensor 4, a torque sensor 5 and a motor 7. As shown in fig. 5, the simulation disc 3 and the force sensor 4 are coaxially arranged at the front end of the rotating shaft 11 in sequence, and the force sensor 4 is arranged close to the rotating shaft 11; as shown in fig. 6, the torque sensor 5 and the motor 7 are coaxially disposed at the rear end of the rotating shaft 11 in sequence, the torque sensor 5 is disposed near the rotating shaft 11, the torque sensor 5 is mounted on the attack angle adjusting rotating plate 22 through the torque sensor mounting bracket 8, the motor 7 is mounted on the attack angle adjusting rotating plate 22 through the motor mounting bracket 9, and the output of the motor 7 is connected with the torque sensor 5 through the coupling 6.
The measuring process of the measuring system of the embodiment for the rotating friction torque of the rotating shaft 11 of the vane type rotating test piece rotating speed measuring device comprises the following steps:
1) as shown in fig. 5, a simulation disc 3 and a force sensor 4 are installed at the front end of a rotating shaft 11 of a rotating shaft mechanism 1, the force sensor 4 is arranged close to the rotating shaft 11, and then a measuring device is placed in a wind tunnel test section, and the simulation disc 3 is blown by airflow with a certain pressure flow for simulating axial aerodynamic force generated in the airflow. Measuring the aerodynamic force acting on the circular plate through the force sensor 4, and adjusting the airflow parameters until the aerodynamic force value measured by the force sensor 4 and acting on the simulation disc 3 reaches the simulation requirement;
2) after the aerodynamic force simulation is qualified, as shown in fig. 7, the force sensor 4 is removed, the torque sensor 5 and the motor 7 are installed at the rear end of the rotating shaft 11 of the rotating shaft mechanism 1, the torque sensor 5 is arranged close to the rotating shaft 11, and the three are coaxially installed; the motor 7 is driven as torque and the spindle mechanism 1 as load. The torque sensor 5 is positioned between the rotating shaft mechanism 1 and the motor 7 and is used for measuring the friction torque of the rotating shaft mechanism 1;
3) as shown in fig. 8, in the testing process, under the action of the aerodynamic force meeting the simulation requirement in step 1), the motor 7 drives the rotating shaft 11 to rotate at a rotating speed of 5-10 rad/s to simulate the rotating speed of a test product, and then torque data of the torque sensor 5 and rotating speed data of the rotating speed sensor are acquired to obtain torque data at the rotating speed, wherein the torque data is friction torque of the measuring device;
the design of the rotating speed of the motor 7 is designed according to actual requirements so as to simulate the rotating speed of a test piece, and under the same test condition, the faster the rotating speed of the motor 7 is, the larger the measured friction torque is);
4) comparing the friction torque with a set threshold, if the friction torque is smaller than the set threshold, executing step 5), if the friction torque is larger than or equal to the set threshold, reducing the friction torque of the rotating shaft mechanism 1 by reducing the specifications of the rotating shaft 11 and the bearing 12, and then performing the friction torque test until the friction torque is smaller than the set threshold, namely the friction torque of the measuring device is within an error allowable range (lower than the threshold);
5) after the friction torque meets the requirement, the simulation disc 3, the torque sensor 5 and the motor 7 are removed, the to-be-tested piece is coaxially installed at the front end of the rotating shaft 11 of the rotating shaft mechanism 1 and is integrally placed in a wind tunnel test section, as shown in fig. 9, the to-be-tested piece is preferably located in an equal mach area (a uniform area of a wind tunnel flow field) of the wind tunnel, namely a diamond area in fig. 9. The test is carried out under the action of aerodynamic force which accords with the working conditions of the test piece, the test piece rotates axially, and the rotating speed sensor measures the rotating speed of the test piece; and adjusting the inclination angle between the attack angle adjusting rotating plate 22 and the attack angle adjusting bottom plate 21 of the attack angle adjusting mechanism 2 according to the posture requirement of the attack angle.
In the embodiment, whether the friction torque meets the requirement is judged by measuring the friction torque of the measuring device, and then whether the measuring device is qualified is further judged, the measuring device with qualified friction torque has no influence on the final rotating speed value, and a qualified measuring device (the friction torque is smaller than a set threshold) is selected by measuring the friction torque; and the friction torque of the rotating shaft mechanism 1 can be reduced by reducing the specifications of the rotating shaft 11 and the bearing 12, and the friction torque of the measuring device meets the requirement. After the friction torque of the measuring device meets the requirement (is smaller than the set threshold), the influence of the friction torque of the rotating shaft on the measuring device can be ignored when the testing piece is installed for measuring the rotating speed. The speed of the motor 7 is adjusted to meet the requirement of simulating the rotating speed of a test piece, different friction torques can be measured at different rotating speeds, and the friction torques at various rotating speeds required by the test are controlled within a range (the highest rotating speed is met, and other rotating speeds are also met). The design of the rotating speed is to simulate the rotating speed of a test piece according to actual needs.
The above description is only for the preferred embodiment of the present invention and does not limit the technical solution of the present invention, and any modifications made by those skilled in the art based on the main technical idea of the present invention belong to the technical scope of the present invention.
Claims (7)
1. The utility model provides a vane type rotation test piece rotational speed measuring device which characterized in that: comprises an attack angle adjusting mechanism (2), a rotating shaft mechanism (1) and a rotating speed sensor;
the attack angle adjusting mechanism (2) comprises an attack angle adjusting bottom plate (21) and an attack angle adjusting rotating plate (22) arranged above the attack angle adjusting bottom plate (21); a hinged piece and an angle adjusting component are arranged between the attack angle adjusting bottom plate (21) and the attack angle adjusting rotating plate (22), so that the inclination angle between the attack angle adjusting rotating plate (22) and the attack angle adjusting bottom plate (21) is adjusted;
the rotating shaft mechanism (1) comprises a rotating shaft mounting seat (13) and a rotating shaft (11), the rotating shaft mounting seat (13) is arranged on the attack angle adjusting rotating plate (22), the rotating shaft (11) penetrates through the rotating shaft mounting seat (13) through a bearing (12), and the front end of the rotating shaft mounting seat (13) extends out of the rotating shaft mounting seat;
the rotating speed sensor comprises a gear (14) coaxially arranged on the rotating shaft (11) and a proximity switch (15) arranged in the mounting seat and matched with the gear (14), wherein the proximity switch (15) measures the number of teeth through which the gear (14) passes, and the rotating speed of the rotating shaft (11) is obtained.
2. The apparatus for measuring the rotational speed of a vane-type rotation test piece according to claim 1, wherein: the hinged piece is a hinged rotating shaft (23) which is connected with the attack angle adjusting bottom plate (21) and the attack angle adjusting rotating plate (22);
the inclination angle adjusting assembly comprises a fixing bolt (25) and a positioning pin (26);
the upper surface of the attack angle adjusting bottom plate (21) is provided with a connecting plate (24), the connecting plate (24) is provided with a plurality of first positioning pin holes (241) and arc-shaped long holes (242) coaxial with the hinge rotating shaft (23), and the first positioning pin holes (241) are circumferentially arranged by taking the axis of the hinge rotating shaft (23) as the circle center;
the attack angle adjusting rotating plate (22) is provided with a second positioning pin hole (221) matched with the first positioning pin hole (241) and a through hole (222) matched with the arc-shaped strip hole (242), the first positioning pin hole (241) and the second positioning pin hole (221) are penetrated through the positioning pin (26), the attack angle adjusting rotating plate (22) and the attack angle adjusting bottom plate (21) are positioned, the through hole (222) and the arc-shaped strip hole (242) are penetrated through the fixing bolt (25), and the attack angle adjusting bottom plate (21) and the attack angle adjusting rotating plate (22) are fixed.
3. The vane-type rotation test piece rotation speed measurement device according to claim 1 or 2, wherein: the rotating shaft mounting seat (13) comprises a hollow shell (131) and end covers (132) arranged at two ends of the hollow shell (131), two ends of the bearing (12) are axially limited through a shaft shoulder on the rotating shaft (11) and the end covers (132), and a through hole for the rotating shaft (11) to penetrate out is formed in the end covers (132).
4. The vane-type rotation test piece rotation speed measuring device according to claim 3, wherein: the bearings (12) are a pair of angular contact bearings installed face to face, and the 2 angular contact bearings are respectively positioned at two end parts of the hollow shell (131).
5. A system for measuring the friction torque of the vane-type rotating test piece rotating speed measuring device according to claim 1, which is characterized in that: the device comprises a simulation disc (3), a force sensor (4), a torque sensor (5) and a motor (7);
the simulation disc (3) and the force sensor (4) are sequentially and coaxially arranged at the front end of the rotating shaft (11), and the force sensor (4) is arranged close to the rotating shaft (11);
torque sensor (5) and motor (7) are used for coaxial setting in proper order in the rear end of pivot (11), and torque sensor (5) are close to pivot (11) and set up, and motor (7) are installed on angle of attack regulation rotor plate (22).
6. A method for measuring the friction torque of the vane-type rotating test piece rotating speed measuring device according to claim 1, which is characterized in that the measuring system according to claim 5 is adopted, and comprises the following steps:
1) the method comprises the steps that a simulation disc (3) and a force sensor (4) are installed at the front end of a rotating shaft (11) of a rotating shaft mechanism (1), the force sensor (4) is arranged close to the rotating shaft (11), then a measuring device is placed in a wind tunnel test section, the simulation disc (3) is blown by air flow, and air flow parameters are adjusted until the aerodynamic force value acting on the simulation disc (3) and measured by the force sensor (4) meets simulation requirements;
2) the force sensor (4) is removed, the torque sensor (5) and the motor (7) are installed at the rear end of the rotating shaft (11) of the rotating shaft mechanism (1), the torque sensor (5) is arranged close to the rotating shaft (11), and the motor (7) is installed on the attack angle adjusting rotating plate (22);
3) under the action of aerodynamic force meeting the simulation requirement in the step 1), simultaneously, a motor (7) drives a rotating shaft (11) to rotate at the speed of 5-10 revolutions per second, torque data of a torque sensor (5) and rotating speed data of a rotating speed sensor are collected, and torque data at the rotating speed are obtained, wherein the torque data are friction torque of a measuring device;
4) comparing the friction torque with a set threshold, if the friction torque is smaller than the set threshold, executing the step 5), if the friction torque is larger than or equal to the set threshold, replacing the rotating shaft (11) and the bearing (12) and returning to the step 3) until the friction torque is smaller than the set threshold;
5) the method comprises the steps of dismantling a simulation disc (3), a torque sensor (5) and a motor (7), coaxially installing a to-be-tested piece at the front end of a rotating shaft (11) of a rotating shaft mechanism (1), integrally arranging the to-be-tested piece in a wind tunnel test section, adjusting an inclination angle between an attack angle adjusting rotating plate (22) and an attack angle adjusting bottom plate (21) of an attack angle adjusting mechanism (2) according to the posture requirement of the attack angle, testing under the action of aerodynamic force according with the working condition of the tested piece, and measuring the rotating speed of the tested piece by a rotating speed sensor.
7. The method for measuring the friction torque of the vane-type rotation test piece rotating speed measuring device according to claim 6, which is characterized in that: and 5), positioning the to-be-tested piece in an equal Mach area of the wind tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111199655.2A CN114112289B (en) | 2021-10-14 | 2021-10-14 | Vane type rotation test piece rotating speed measuring device and measuring system and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111199655.2A CN114112289B (en) | 2021-10-14 | 2021-10-14 | Vane type rotation test piece rotating speed measuring device and measuring system and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114112289A true CN114112289A (en) | 2022-03-01 |
| CN114112289B CN114112289B (en) | 2024-02-06 |
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| CN114942119A (en) * | 2022-04-21 | 2022-08-26 | 北京理工大学 | High-temperature high-speed rotating impeller mechanical transient flow field testing system |
| CN118010293A (en) * | 2024-04-09 | 2024-05-10 | 中国空气动力研究与发展中心高速空气动力研究所 | Sub-transonic variable-angle concurrent direct-connection wind tunnel test support platform and design method |
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