CN213658220U - Microbalance calibrating device - Google Patents
Microbalance calibrating device Download PDFInfo
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- CN213658220U CN213658220U CN202022709490.6U CN202022709490U CN213658220U CN 213658220 U CN213658220 U CN 213658220U CN 202022709490 U CN202022709490 U CN 202022709490U CN 213658220 U CN213658220 U CN 213658220U
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Abstract
The utility model relates to a microbalance calibrating device, including load plate, load pole and calibration branch. The loading plate comprises a first beam, a second beam and a third beam, the second beam is parallel to the third beam, and the first beam is perpendicular to the second beam and the third beam; one end of the microbalance is fixed at the center of the first beam, the other end of the microbalance is fixed on the calibration support rod 3, and the calibration support rod 3 is connected on a supporting mechanism of the calibration device. When five units of the microbalances Y, Z, Mx, My and Mz are loaded, the loading plate 1 is horizontally placed, and two ends of the second beam and two ends of the third beam are both connected with loading rods; when the microbalance X element is loaded, the loading plate 1 is vertically placed, and two ends of the first beam are connected with loading rods. The utility model discloses simple structure, light in weight can realize the quick loading of six weight loads in the calibration process to eliminate the error that traditional calibration methods such as load switching-over arouse, increase substantially the loading precision.
Description
Technical Field
The utility model belongs to wind-tunnel balance calibration field relates to a simple and easy wind-tunnel microbalance calibrating device for realize microbalance's high accuracy quick calibration.
Background
The measurement load of the microbalance is small, and generally ranges from tens of grams to hundreds of grams, taking the Y element of the six-component microbalance as an example. When the micro balance with the measuring range is used for carrying out ground static calibration, the calibration device of the balance is required to realize the loading capacity of six-component load, the loading precision is also required to be high, and the weight of the calibration device is light enough, so that great difficulty is brought to the calibration of the micro balance.
The calibration device and the calibration method of the conventional balance cannot be directly applied to the microbalance, for example, the conventional balance generally applies a load reversing device represented by a pulley, and converts the gravity of an applied weight into a horizontal force of the six-component balance, but the pulley inevitably has a friction force which is a small amount and can be ignored for the conventional balance, but for the microbalance, the friction force is generally in the same order of magnitude as the range of the balance, so that the calibration accuracy of the microbalance is greatly reduced. In addition, the loading device with six-component synchronous loading capacity is generally complex in structure and large in weight, and the self weight of the loading device easily exceeds the design range of the balance.
At present, six-component high-precision loading of a microbalance is always a difficult problem for microbalance calibration, so that the calibration precision of the microbalance is always difficult to improve.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem be: the device is simple in structure and light in weight, can realize quick loading of six-component load in the calibration process, eliminates errors caused by traditional calibration methods such as load reversing and the like, and greatly improves the loading precision.
The utility model provides a technical scheme be:
a microbalance calibration device comprises a loading plate, a loading rod and a calibration support rod;
the loading plate comprises a first beam, a second beam and a third beam, the second beam is parallel to the third beam, and the first beam is perpendicular to the second beam and the third beam; one end of the microbalance is fixed at the center of the first beam, the other end of the microbalance is fixed on the calibration support rod, and the other end of the calibration support rod is connected to a support mechanism of the calibration device through a flange surface;
when five units of the microbalances Y, Z, Mx, My and Mz are loaded, the loading plates are horizontally placed, and two ends of the second beam and two ends of the third beam are both connected with loading rods;
when the microbalance X element is loaded, the loading plate is vertically placed, and two ends of the first beam are connected with the loading rods.
Each loading rod comprises a pull frame, a pull rod and a weight tray; wherein the pulling frame is connected to the loading plate, and the pulling frame is connected with the weight plate in a threaded manner through a pulling rod.
Circular through holes are formed in the two ends of the first beam, the second beam and the third beam, steel balls are placed in the holes, a circular through hole is also formed in the pull frame of each loading rod, and the pull frames are connected with the steel balls in an overlapping mode through the circular holes to achieve connection with the loading plates.
The diameters of the circular through holes of the first beam, the second beam and the third beam on the loading plate and the circular through holes on the pull frame of the loading rod are smaller than the diameter of the steel ball.
The calibration support rod comprises a square support rod, a round support rod and pins, the square support rod is in a cuboid shape, 4 planes are mutually perpendicular reference surfaces, a cylindrical through hole and two first pin holes are formed in the square support rod, the first pin holes are communicated with the through hole, and the two first pin holes are spaced by 90 degrees;
one end of the round supporting rod is inserted into the through hole of the square supporting rod, four second pin holes are processed on one outer circumference of the round supporting rod, and the interval between every two adjacent second pin holes is 90 degrees;
after the round supporting rod is inserted into the through hole of the square supporting rod, the second pin hole is aligned with the first pin hole, and a pin is inserted into the aligned second pin hole and the aligned first pin hole.
The first beam of the loading plate is connected with the microbalance through a conical surface and locked through a nut.
Compared with the prior art, the utility model beneficial effect be:
(1) the utility model discloses a simple and easy microbalance calibrating device directly utilizes the dead weight loading of weight, can avoid the load switching-over of balance in traditional calibration method, eliminates the loading error that load switching-over devices such as pulley introduced, guarantees microbalance's little load loading precision.
(2) The utility model discloses a balance calibrating device simple structure, spare part is few, light in weight, and loading speed is fast, and it is convenient to use.
(3) The utility model discloses a balance calibrating device is lower to calibration work platform's requirement, and the workstation only needs to provide the interface that supports side branch, and the installation is simple.
Drawings
Fig. 1 is a perspective view of a simple microbalance calibration device according to the present invention;
fig. 2 is a top view of a simple microbalance calibration device according to the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a cross-sectional view B-B of FIG. 2;
fig. 5 is a schematic diagram of the posture of the present invention when loading X elements.
Detailed Description
The utility model discloses mainly to the poor problem of loading precision that faces in the microbalance calibration process, provide a simple and easy microbalance calibrating device, can avoid load switching-over device in the balance calibration process, directly utilize the dead weight of weight to carry out the loading to the transmission precision of effective assurance load. The following detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.
As shown in fig. 1 to 5, a simple microbalance calibration device includes a load plate 1, a load bar 2 and a calibration bar 3. The calibration support rod 3 is connected with the supporting mechanism of the calibration device through a flange face, and the other end of the calibration support rod is connected with the microbalance 4, so that the supporting function of the microbalance 4 is realized. And loading points are arranged at different positions of the loading plate 1 and are used for realizing the loading of each component of the microbalance.
Specifically, the loading plate 1 comprises a first beam, a second beam and a third beam, the second beam and the third beam are parallel, the first beam is perpendicular to the second beam and the third beam, and the first beam of the loading plate 1 is connected with the microbalance 4 through a conical surface and locked through a nut.
When five units of the microbalances Y, Z, Mx, My and Mz are loaded, the loading plate 1 is horizontally placed, and two ends of the second beam and two ends of the third beam are both connected with loading rods;
when the microbalance X element is loaded, the loading plate 1 is vertically placed, and two ends of the first beam are connected with loading rods.
And a steel ball 6 is arranged between the loading rod 2 and the loading plate 1 and is used for realizing the positioning between the loading plate 1 and the loading rod 2. A weight 5 is applied to the loading beam 2, the weight 5 being transferred by its own weight to the loading plate 1 and further to the balance 4.
The loading plate 1 is provided with 6 loading points in total. When the loading plate is horizontal, the two ends of the second beam and the two ends of the third beam are 4 loading points, as shown in fig. 2, the loading points 11, 12, 13 and 14 are distributed in a rectangular shape, and the length and width of the rectangular shape are loading force arms in sequence, so as to realize the loading of five units of the balance Y, Z, Mx, My and Mz. When the loading plate is vertical, the two ends of the first beam are provided with loading points 15 and 16, as shown in fig. 5, the loading points 15 and 16 are symmetrically distributed about the central line of the loading plate, and are used for realizing the loading of the balance X element. Each loading point is provided with a through hole, a steel ball 6 with the diameter larger than the aperture is placed on the through hole, and a loading rod is placed on the steel ball, so that the relative position of the loading rod and the loading plate can be ensured, and the load of the loaded weight can be accurately transferred to the balance.
The loading rod 2 comprises a pull frame 21, a pull rod 22 and a weight plate 23. Wherein, the pull frame 21 is also provided with a through hole and is lapped on the loading plate 1 through the steel ball 6, the pull frame 21 is in threaded connection with the weight tray 23 through the pull rod 22, and the weight 5 is applied on the weight tray 23 to realize the loading function. The diameter of the through hole on the pulling frame 21 is smaller than that of the steel ball 6.
The calibration bar 3 comprises three parts, namely a square bar 31, a round bar 32 and a pin 33. The square supporting rod 31 is in a cuboid shape, 4 planes are mutually perpendicular reference surfaces, the square supporting rod 31 is connected with the round supporting rod 32 in a matched mode through a cylindrical surface, 1 pin hole is formed in each of the square supporting rod 31 in the horizontal direction and the vertical direction, 4 pin holes are formed in the round supporting rod 32 in the matched connection position along the circumferential direction of the supporting rod at an angle of 90 degrees, and the pin holes and the round supporting rod are located through pins 33 and used for achieving the purpose that the rolling direction of the round supporting rod is adjustable at an angle of 90 degrees.
The 4 planes of the square supporting rod 31 are reference surfaces, and the levelness of the square supporting rod in the rolling direction is adjusted through the level gauge during rotation, so that the square supporting rod is adjustable in the rolling direction by 90 degrees.
After the micro balance loading device is installed, a weight 5 is applied to the loading rod 2, the dead weight of the weight 5 is transmitted to the loading plate 1 and further transmitted to the balance 4, and the balance is loaded.
During operation, the microbalance 4 is firstly mounted on the round supporting rod 32, the round supporting rod is rotated to adjust the + Y direction of the microbalance to be coincident with the gravity direction, the round supporting rod 32 and the microbalance 4 are mounted on the square supporting rod 31, and the square supporting rod 31 is mounted on the supporting mechanism of the calibration device. Installing a loading plate 1, respectively installing loading rods on loading points 11, 12, 13 and 14, realizing the loading of balances + Y, +/-Mz and +/-Mx, and detaching the loading plate 1 and the loading rods 2 after the loading is finished;
the round supporting rod 32 and the balance 4 are detached from the square supporting rod 31 together, the round supporting rod is rotated to adjust the + Z direction of the balance to be coincident with the gravity direction, the balance is installed on the square supporting rod 31 again, the loading plate 1 is installed, the loading rods are installed on the loading points 11, 12, 13 and 14 respectively, the + Z and +/-My loading of the balance can be realized, and the loading plate 1 and the loading rod 2 are detached after the loading is finished;
the round supporting rod 32 and the balance 4 are detached from the square supporting rod 31 together, the round supporting rod is rotated to adjust the-Y direction of the balance to be coincident with the gravity direction, the balance is installed on the square supporting rod 31 again, the loading plate 1 is installed, the loading rods are installed on the loading points 11, 12, 13 and 14 respectively, the balance-Y can be loaded, and the loading plate 1 and the loading rod 2 are detached after the loading is finished;
the round supporting rod 32 and the balance 4 are detached from the square supporting rod 31 together, the round supporting rod is rotated to adjust the-Z direction of the balance to be coincident with the gravity direction, the balance is installed on the square supporting rod 31 again, the loading plate 1 is installed, the loading rods are installed on the loading points 11, 12, 13 and 14 respectively, the balance-Z can be loaded, and the loading rod 2 is detached after the loading is finished.
The mounting relationship of the round bar 32, the square bar 31 and the balance 4 is maintained, the square bar is rotated by 90 °, and the-X direction of the balance is adjusted to coincide with the gravity direction, as shown in fig. 5. A loading plate 1 is installed, and loading rods are installed on loading points 15 and 16, so that the balance-X element can be loaded; the installation relationship of the round supporting rod 32, the square supporting rod 31 and the balance 4 is kept, the square supporting rod is rotated by 180 degrees, and the + X direction of the balance is adjusted to be coincident with the gravity direction. The balance + X element loading can be realized by installing the loading plate 1 and installing loading rods on the loading points 15 and 16.
The working principle is as follows:
1. when the + Y direction of the balance is adjusted to coincide with the gravity direction, weights with the same number are applied to the loading points 11, 12, 13 and 14, and the balance + Y element can be loaded; when the difference exists between the sum of the weights of the loading points 11 and 12 and the sum of the weights of the loading points 13 and 14, the loading of the balance +/-Mx element can be realized; when the difference exists between the sum of the weights of the loading points 11 and 14 and the sum of the weights of the loading points 12 and 13, the loading of the balance +/-Mz element can be realized.
2. When the + Z direction of the balance is adjusted to coincide with the gravity direction, weights with the same number are applied to the loading points 11, 12, 13 and 14, and the balance + Z element can be loaded; when the difference exists between the sum of the weights of the loading points 11 and 14 and the sum of the weights of the loading points 12 and 13, the loading of the balance +/-My element can be realized.
3. When the-Y and-Z directions of the balance are adjusted to coincide with the gravity direction, the loading points 11, 12, 13 and 14 apply weights with the same number, and the loading of the-Y and-Z units can be sequentially realized.
4. When the +/-X direction of the balance is adjusted to coincide with the gravity direction, weights with the same number are applied to the loading points 15 and 16, and loading of the +/-X units can be sequentially achieved.
In summary, the microbalance loading device provided by the utility model realizes the change of the posture of the microbalance by rotating the support rod, thereby realizing the loading of six components of the microbalance, and has simple integral structure, light weight and convenient use; and other conversion is not carried out in the loading process, so that the loading error caused by load reversing and the like is avoided, and the calibration precision of the microbalance is effectively improved.
The details of the present invention not described in detail in the specification are well known to those skilled in the art.
Claims (6)
1. A microbalance calibration device, characterized in that: comprises a loading plate (1), a loading rod (2) and a calibration support rod (3);
the loading plate (1) comprises a first beam, a second beam and a third beam, wherein the second beam is parallel to the third beam, and the first beam is perpendicular to the second beam and the third beam; one end of the microbalance is fixed at the center of the first beam, the other end of the microbalance is fixed on the calibration support rod (3), and the other end of the calibration support rod (3) is connected to a support mechanism of the calibration device through a flange surface;
when five units of the microbalances Y, Z, Mx, My and Mz are loaded, the loading plate (1) is horizontally placed, and two ends of the second beam and two ends of the third beam are both connected with loading rods;
when the X element of the microbalance is loaded, the loading plate (1) is vertically placed, and two ends of the first beam are connected with the loading rods.
2. A microbalance calibration device according to claim 1, wherein: each loading rod comprises a pull frame (21), a pull rod (22) and a weight tray (23); wherein the pulling frame (21) is connected to the loading plate (1), and the pulling frame (21) and the weight plate (23) are connected in a threaded manner through a pulling rod (22).
3. A microbalance calibration device according to claim 1, wherein: circular through holes are formed in the two ends of the first beam, the second beam and the third beam, steel balls (6) are placed in the holes, circular through holes are also formed in the pull frame (21) of each loading rod, the pull frame (21) is connected to the steel balls (6) in an overlapping mode through the circular holes, and connection with the loading plate (1) is achieved.
4. A microbalance calibration device according to claim 3, wherein: the diameters of the circular through holes of the first beam, the second beam and the third beam on the loading plate and the circular through holes on the pull frame (21) of the loading rod are all smaller than the diameter of the steel ball (6).
5. A microbalance calibration device according to claim 1, wherein: the calibration support rod (3) comprises a square support rod (31), a round support rod (32) and pins (33), the square support rod (31) is cuboid, 4 planes are mutually perpendicular reference surfaces, a cylindrical through hole and two first pin holes are formed in the square support rod (31), the first pin holes are communicated with the through hole, and the two first pin holes are spaced by 90 degrees;
one end of the round supporting rod (32) is inserted into the through hole of the square supporting rod (31), four second pin holes are processed on one outer circumference of the round supporting rod (32), and two adjacent second pin holes are spaced by 90 degrees;
after the round supporting rod (32) is inserted into the through hole of the square supporting rod (31), the second pin hole is aligned with the first pin hole, and a pin (33) is inserted into the aligned second pin hole and the aligned first pin hole.
6. A microbalance calibration device according to claim 1, wherein: the first beam of the loading plate (1) is connected with the microbalance (4) through a conical surface and locked through a nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022709490.6U CN213658220U (en) | 2020-11-20 | 2020-11-20 | Microbalance calibrating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022709490.6U CN213658220U (en) | 2020-11-20 | 2020-11-20 | Microbalance calibrating device |
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| CN213658220U true CN213658220U (en) | 2021-07-09 |
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| CN202022709490.6U Active CN213658220U (en) | 2020-11-20 | 2020-11-20 | Microbalance calibrating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113532789A (en) * | 2021-08-17 | 2021-10-22 | 中国空气动力研究与发展中心高速空气动力研究所 | Device for improving calibration uncertainty of half-mode balance and application |
-
2020
- 2020-11-20 CN CN202022709490.6U patent/CN213658220U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113532789A (en) * | 2021-08-17 | 2021-10-22 | 中国空气动力研究与发展中心高速空气动力研究所 | Device for improving calibration uncertainty of half-mode balance and application |
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