Special generation device for calibration of rotating speed sensor in enthalpy difference test room

Abstract

The utility model discloses a special generation device for calibration of a revolution speed sensor in an enthalpy difference laboratory, which relates to the technical field of sensor testing and comprises a control box and a control panel fixedly arranged on the surface of one side of the control box. The servo motor with analog quantity output is used as a rotating speed source, the rotating speed output of the servo motor is within + / -0.1%, the output stability is good, the rotating speed required to be measured is set on the control panel during use, the servo motor is started, and the rotating speed can drive the speed change mechanism through the connecting flange, the rotating speed of 1: 5 can be generated through the rotating disc group, the current rotating speed output value can be displayed through the control panel during use, and after the rotating speed output is stable, the displayed value can correspond to the rotating speed value adjusted to a verification point by the verified rotating speed standard device, so that the next judgment is carried out, and the test is completed. Manufacturing cost is low, operation is convenient, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of sensor testing, in particular to a special generating device for calibrating a rotation speed sensor in an enthalpy difference test room. Background Art

[0002] The dedicated generator for calibrating the speed sensor in the enthalpy difference test room is mainly used for calibrating the speed sensor in the enthalpy difference test room, as well as various tachometers, speed sensors and speed measuring instruments. The application scenarios of speed sensors and tachometers are relatively wide, so speed generators are needed in various metrological institutions. The principle of tachometer speed calibration is to compare the speed frequency and rotation speed of the speed sensor with the output frequency and speed of the speed generator to achieve the calibration requirements.

[0003] In the prior art, the speed source of the dedicated generator for calibrating the speed sensor in the enthalpy difference test laboratory is usually a servo motor, a stepper motor, or a hollow electric motor, and the speed change mechanism is usually a gearbox or other speed change device. The control system adopts closed-loop control or open-loop control to ensure the accuracy and stability of the standard speed output. However, the speed generators on the market basically use complex software and mechanical components to achieve speed output, resulting in high manufacturing costs and high prices. The calibration cost of small and medium-sized metering institutions is also high.

[0004] In view of the above technical defects, a solution is now proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a special generating device for calibrating a rotation speed sensor in an enthalpy difference test laboratory, which has a simple mechanical structure, low manufacturing cost, convenient operation and strong practicality.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a special generating device for calibration of a speed sensor in an enthalpy difference test chamber, comprising a control box and a control panel, a top plate fixedly provided on the top surface of the control box, a flange seat fixedly provided on the top surface of the top plate, a connecting flange fixedly installed on the flange seat, a servo motor fixedly installed on one side of the connecting flange, and the output shaft of the servo motor rotates through the connecting flange and extends to the other side thereof, which is adapted for a speed change mechanism.

[0007] Furthermore, the outer surface of the speed change mechanism is connected to a turntable group, which includes a first turntable and a second turntable. The turntable group includes a first turntable and a second turntable, and the diameter of the first turntable is smaller than the diameter of the second turntable. The first turntable is fixed at the center position of the speed change mechanism, and the second turntable is fixed at the radial position of the speed change mechanism.

[0008] Furthermore, the speed change mechanism includes a transmission front cover and a transmission rear cover, and the transmission front cover and the transmission rear cover are connected as a whole. The inner sides of the transmission front cover and the transmission rear cover are fixedly sleeved with a bearing group, and the bearing group is adapted to a limit caliper ring, and the limit caliper ring is fixedly arranged on opposite sides of the transmission front cover and the transmission rear cover. The bearing group consists of a first bearing sleeve and a second bearing sleeve, and the first bearing sleeve is rotatably connected with a curved tooth, and a first rotating rod is provided between the curved tooth and the first bearing sleeve, and the outer end of the first rotating rod is fixedly connected to the curved tooth, and both ends of the first rotating rod rotate through the limit caliper ring and extend to the outside of the transmission front cover and the transmission rear cover, wherein one end of the first rotating rod is fixedly connected to the first turntable.

[0009] Furthermore, the second bearing sleeve is rotatably connected to the main gear shaft, and a second rotating rod is provided between the main gear shaft and the second bearing sleeve. The outer end of the second rotating rod is fixedly connected to the main gear shaft, and both ends of the second rotating rod rotate through the limit caliper ring and extend to the outside of the gearbox front cover and the gearbox rear cover, wherein one end of the second rotating rod is fixedly connected to the second turntable, and the outer end of the second rotating rod is also provided with precision main bevel teeth, the outer side of the main gear shaft is meshed with the bevel teeth, and the other end of the second rotating rod is fixedly connected to a coupling.

[0010] Furthermore, a plurality of positioning pins are provided between the gearbox front cover and the gearbox rear cover, and the gearbox front cover and the gearbox rear cover are connected as a whole through the positioning pins.

[0011] Furthermore, the control box is provided with feet at the corners of the bottom surface, which facilitate the stable placement of the control box.

[0012] Furthermore, a control panel is fixedly mounted on the outer end of the control box, and operation instructions are input and test results are displayed through the control panel.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0014] The enthalpy difference test room speed sensor calibration special generating device adopts a servo motor with analog output as the speed source. The speed output of the servo motor is within ±0.1% and has good output stability. When in use, the required measured speed is set on the control panel, the servo motor is started, and the speed can drive the speed change mechanism through the connecting flange, wherein the speed change mechanism consists of a turntable group and curved and helical teeth. The turntable group can generate a speed of 1:5. When in use, the current speed output value can be displayed on the control panel. After the speed output is stable, the displayed value can correspond to the speed value of the speed standard device being tested adjusted to the verification point, so as to make the next judgment and complete the test. The utility model has a simple mechanical structure, low manufacturing cost, convenient operation and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shows a schematic diagram of the overall external structure of the utility model;

[0016] Figure 2 Shows a schematic diagram of the internal structure of the speed change mechanism of the present utility model;

[0017] Legend: 1. Control panel; 2. Top plate; 3. Turntable assembly; 4. Speed ​​change mechanism; 5. Connecting flange; 6. Servo motor; 7. Connecting flange seat; 8. Control box; 9. Ground anchor; 10. Limit caliper ring; 11. Gearbox front cover; 12. Bearing assembly; 13. Helical gear; 14. Main gear shaft; 15. Precision main helical gear; 16. Locating pin; 17. Gearbox rear cover; 18. Coupling. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example:

[0020] like Figure 1-2 As shown, a special generator for calibrating a speed sensor in an enthalpy difference test room comprises a control box 8 and a control panel 1. A top plate 2 is fixedly provided on the top surface of the control box 8, a flange seat 7 is fixedly provided on the top surface of the top plate 2, a connecting flange 5 is fixedly installed on the flange seat 7, a servo motor 6 is fixedly installed on one side of the connecting flange 5, and the output shaft of the servo motor 6 rotates through the connecting flange 5 and extends to the other side thereof, which is adapted to be equipped with a speed change mechanism 4.

[0021] The outer surface of the speed change mechanism 4 is connected to the turntable group 3, which includes a first turntable and a second turntable. The turntable group 3 includes a first turntable and a second turntable, and the diameter of the first turntable is smaller than the diameter of the second turntable. The first turntable is fixed at the center position of the speed change mechanism 4, and the second turntable is fixed at the radial position of the speed change mechanism 4.

[0022] The speed change mechanism 4 includes a transmission front cover 11 and a transmission rear cover 17, which are connected as a whole. The inner sides of the transmission front cover 11 and the transmission rear cover 17 are fixedly sleeved with a bearing group 12, and the bearing group 12 is adapted to fit a limit caliper ring 10. The limit caliper ring 10 is fixedly arranged on opposite sides of the transmission front cover 11 and the transmission rear cover 17. The bearing group 12 consists of a first bearing sleeve and a second bearing sleeve. The first bearing sleeve is rotatably connected to a curved tooth 13. A first rotating rod is provided between the curved tooth and the first bearing sleeve. The outer end of the first rotating rod is fixedly connected to the curved tooth 13. The two ends of the first rotating rod rotate through the limit caliper ring 10 and extend to the outside of the transmission front cover 11 and the transmission rear cover 17, wherein one end of the first rotating rod is fixedly connected to the first turntable.

[0023] The second bearing sleeve is rotatably connected to the main gear shaft 14, and a second rotating rod is provided between the main gear shaft 14 and the second bearing sleeve. The outer end of the second rotating rod is fixedly connected to the main gear shaft 14, and both ends of the second rotating rod rotate through the limit caliper ring 10 and extend to the outside of the gearbox front cover 11 and the gearbox rear cover 17, wherein one end of the second rotating rod is fixedly connected to the second turntable, and the outer end of the second rotating rod is also provided with a precision main bevel tooth 15, the outer side of the main gear shaft 14 is meshed with the bevel tooth 13, and the other end of the second rotating rod is fixedly connected to the coupling 18.

[0024] A plurality of positioning pins 16 are provided between the transmission front cover 11 and the transmission rear cover 17 , and the transmission front cover 11 and the transmission rear cover 17 are connected as a whole through the positioning pins 16 .

[0025] A foot 9 is fixedly provided at the corner of the bottom surface of the control box 8, and the foot 9 facilitates the stable placement of the control box 8.

[0026] A control panel 1 is fixedly mounted on the outer end of the control box 8 , and operation instructions are input through the control panel 1 and test results are displayed.

[0027] Here's how it works:

[0028] A servo motor 6 with analog output is used as a speed source. The speed output of the servo motor 6 is within ±0.1% and has good output stability. When in use, the required measured speed is set on the control panel 1. The measured speed range is 1 to 4000 r / min. The servo motor 6 is started, and the speed is driven by the connecting flange 5 to drive the speed change mechanism 4;

[0029] The speed change mechanism 4 is composed of a bearing group 12 and a curved bevel gear 13. The bearing group 12 can generate a 1:5 speed. The speed of the second turntable on the turntable group 3 is the same as that of the servo motor 6. For example, if the servo motor is 3000r / min, the speed measured by the tachometer facing the second turntable is also 3000r / min. The first turntable on the turntable group 3 outputs at a speed 5 times that of the servo motor 6, which is a speed change. That is, when the motor outputs 3000r / min, the measured speed is The tachometer measures 5*3000r / min=15000r / min on the first turntable. Stick two pieces of reflective paper on the first turntable in opposite directions. Stick the second turntable in turntable group 3 with "Radius rotation rate = input*1" and "Diameter rotation rate = input*2". Stick the first turntable in turntable group 3 with "Radius rotation rate = input*1*5" and "Diameter rotation rate = input*2*5". Then the measured speed is 2*15000r / min=30000r / min, which meets the specification requirements.

[0030] When in use, preheat or adjust the speed change mechanism 4, confirm whether the control panel 1 can normally receive the speed signal, set the lowest and highest two test points through the control panel 1 to conduct a test run, and use the speed standard device to verify whether its output speed setting value is consistent. If it is normal, then conduct speed verification;

[0031] Select several calibration points such as 30r / min, 50r / min, 100r / min, 300r / min, 500r / min, 1000r / min, 3000r / min through the control panel 1 according to the regulations, then connect the servo motor 6 to the circuit and start working. The current speed output value is displayed through the "high speed operation rate" and "low speed operation rate" on the control panel 1. After the speed output stabilizes, this displayed value can correspond to the speed value of the calibration point adjusted by the calibrated speed standard device, so as to make the next judgment. After the test is completed, shut down the equipment through the control panel 1.

[0032] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A special generator for calibrating a speed sensor in an enthalpy difference test chamber, comprising a control box (8) and a control panel (1), wherein a top plate (2) is fixedly provided on the top surface of the control box (8), characterized in that: A flange seat (7) is fixedly provided on the top surface of the top plate (2), a connecting flange (5) is fixedly mounted on the flange seat (7), a servo motor (6) is fixedly mounted on one side of the connecting flange (5), and an output shaft of the servo motor (6) rotates through the connecting flange (5) and extends to the other side thereof to be adapted for a speed change mechanism (4).

2. The enthalpy difference test room speed sensor calibration dedicated generator according to claim 1, characterized in that: The outer surface of the speed change mechanism (4) is connected to a turntable group (3), the turntable group (3) includes a first turntable and a second turntable, the turntable group (3) includes the first turntable and the second turntable, and the diameter of the first turntable is smaller than the diameter of the second turntable, the first turntable is fixed at the center position of the speed change mechanism (4), and the second turntable is fixed at a radial position of the speed change mechanism (4).

3. The enthalpy difference test room speed sensor calibration dedicated generator according to claim 2, characterized in that: The speed change mechanism (4) comprises a transmission front cover (11) and a transmission rear cover (17), wherein the transmission front cover (11) and the transmission rear cover (17) are connected as a whole, and a bearing group (12) is fixedly provided on the inner side of the transmission front cover (11) and the transmission rear cover (17), wherein the bearing group (12) is adapted to fit a limit caliper ring (10), and the limit caliper ring (10) is fixedly provided on opposite sides of the transmission front cover (11) and the transmission rear cover (17), and the bearing group (12) is composed of a first bearing sleeve and a second bearing sleeve, wherein the first bearing sleeve is rotatably connected to a curved bevel gear (13), and a first rotating rod is provided between the curved bevel gear and the first bearing sleeve, and an outer end of the first rotating rod is fixedly connected to the curved bevel gear (13), and both ends of the first rotating rod rotate through the limit caliper ring (10) and extend to the outside of the transmission front cover (11) and the transmission rear cover (17), wherein one end of the first rotating rod is fixedly connected to the first rotating disk.

4. The enthalpy difference test room speed sensor calibration dedicated generator according to claim 3, characterized in that: The second bearing sleeve is rotatably connected to a main gear shaft (14); a second rotating rod is provided between the main gear shaft (14) and the second bearing sleeve; an outer end of the second rotating rod is fixedly connected to the main gear shaft (14); both ends of the second rotating rod rotate through the limit caliper ring (10) and extend to the outside of the gearbox front cover (11) and the gearbox rear cover (17); one end of the second rotating rod is fixedly connected to the second rotating disk; a precision main bevel tooth (15) is further provided on the outer end of the second rotating rod; the outer side of the main gear shaft (14) is meshed with the bevel tooth (13); and the other end of the second rotating rod is fixedly connected to a coupling (18).

5. The enthalpy difference test room speed sensor calibration dedicated generator according to claim 3, characterized in that: A plurality of positioning pins (16) are provided between the transmission front cover (11) and the transmission rear cover (17).

6. The enthalpy difference test room speed sensor calibration dedicated generator according to claim 1, characterized in that: A foot (9) is fixedly provided at a corner of the bottom surface of the control box (8).

7. The enthalpy difference test room speed sensor calibration dedicated generator according to claim 1, characterized in that: A control panel (1) is fixedly mounted on the outer end of the control box (8).

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