Motor noise detection simulation load device and motor noise detection device

Abstract

The utility model relates to the technical field of motor noise detection, specifically provides a motor noise detection simulation load device and a motor noise detection device, and aims to solve the problem of inaccurate motor noise detection data in the prior art. In order to achieve the purpose, the motor noise detection simulation load device comprises a shell, a driving shaft, a transmission mechanism and a pressure adjusting mechanism, the driving shaft is rotatably arranged on the shell, one end of the driving shaft is connected with the driving end of the motor, the other end of the driving shaft is connected with the transmission mechanism, and the transmission mechanism is arranged in the shell; the pressure adjusting mechanism is arranged to be capable of making contact with the transmission mechanism and adjusting the acting force between the pressure adjusting mechanism and the transmission mechanism. According to the utility model, the actual load-carrying state of the motor can be simulated, no extra noise is generated like a fan, and the accuracy of motor noise detection is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor noise detection, and specifically provides a motor noise detection simulation load device and a motor noise detection device. Background Art

[0002] Household air conditioners have relatively high requirements for noise. The noise of household air conditioners mainly comes from compressor noise, motor noise, fan noise, electromagnetic noise, etc. Currently, the most commonly used motors in household air conditioners are AC motors and DC motors. Since the motor and the fan are assembled together, when the motor rotates rapidly, the fan also rotates rapidly, and the noise of the fan will interfere with the measurement of the motor noise. Moreover, measuring the noise of the motor when it is unloaded does not represent the individual noise of the motor when it is loaded, which will result in inaccurate motor noise data measured. Therefore, it has become difficult to measure the motor noise alone.

[0003] Therefore, a new technical solution is needed in this field to solve the above technical problems, that is, a device that can simulate the rotation of the motor when it is loaded and does not generate noise like a fan. Summary of the Utility Model

[0004] The utility model aims to solve the above technical problems, that is, to solve the problem of inaccurate existing motor noise detection data.

[0005] In a first aspect, the utility model provides a motor noise detection simulation load device. The motor noise detection simulation load device includes a housing, a drive shaft, a transmission mechanism, and a pressure adjustment mechanism; the drive shaft is rotatably arranged on the housing, one end of the drive shaft is connected to the drive end of the motor, the other end of the drive shaft is connected to the transmission mechanism, and the transmission mechanism is arranged in the housing; the pressure adjustment mechanism is arranged to be able to contact the transmission mechanism and be able to adjust the acting force between it and the transmission mechanism.

[0006] In a specific embodiment of the above motor noise detection simulation load device, the transmission mechanism includes a first gear and a second gear. The first gear and the second gear are respectively rotatably arranged in the housing, the first gear is meshed and connected with the second gear, and the other end of the drive shaft is connected to the first gear.

[0007] In a specific embodiment of the above motor noise detection simulation load device, the diameter of the first gear is larger than the diameter of the second gear.

[0008] In the specific implementation manner of the above-mentioned motor noise detection simulation load device, the pressure adjustment mechanism includes a pressure member, an adjustment arm, a connecting arm, an adjustment rod, and a fastening member. There are two sets of the pressure member, the adjustment arm, and the connecting arm respectively. The two sets of adjustment arms are rotatably arranged on the left and right sides of the housing respectively, the two sets of connecting arms are slidably arranged on the left and right sides of the housing respectively, the two sets of pressure members are arranged inside the housing and are in contact with the left and right sides of the second gear respectively. The pressure member, the connecting arm, and the adjustment arm on the same side are connected to each other, and the adjustment rod passes through the two sets of adjustment arms in sequence and is fixed by the fastening member.

[0009] In the specific implementation manner of the above-mentioned motor noise detection simulation load device, the adjustment arm includes a first cantilever and a second cantilever. One end of the first cantilever is rotatably arranged on the housing, and the other end of the cantilever is angularly connected to one end of the second cantilever. The adjustment rod passes through the other end of the second cantilever.

[0010] In the specific implementation manner of the above-mentioned motor noise detection simulation load device, the length of the first cantilever is less than the length of the second cantilever.

[0011] In the specific implementation manner of the above-mentioned motor noise detection simulation load device, the pressure adjustment mechanism further includes an elastic member. The elastic member is arranged on the adjustment rod, and both ends of the elastic member are abutted against the end face of the adjustment rod and the adjustment arm respectively.

[0012] In the specific implementation manner of the above-mentioned motor noise detection simulation load device, a sealing member is arranged between the housing and the drive shaft and the connecting arm respectively.

[0013] In the specific implementation manner of the above-mentioned motor noise detection simulation load device, the housing is filled with damping oil.

[0014] In a second aspect, the present invention further provides a motor noise detection device. The motor noise detection device includes a noise sensor and the above-mentioned motor noise detection simulation load device, and the noise sensor is arranged close to the motor noise detection simulation load device.

[0015] In the case of adopting the above technical solution, the utility model simulates the state of the motor when actually driving a load by adjusting the magnitude of the acting force between the pressure adjustment mechanism and the transmission mechanism, and at the same time does not generate additional noise like a fan, thereby improving the accuracy of motor noise detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following describes the preferred implementation manner of the present invention with reference to the drawings, in which:

[0017] Figure 1(a) shows the noise data detected for a four - stage AC motor under no - load and loaded conditions;

[0018] Figure 1(b) shows the noise data detected for a DC motor under no - load and loaded conditions;

[0019] Figure 2 is a schematic structural diagram of the motor noise detection simulation load device of the present utility model;

[0020] Wherein: 1. Housing; 2. Transmission mechanism; 21. First gear; 22. Second gear; 3. Driving shaft; 4. Pressure regulating mechanism; 41. Pressure member; 42. Connecting arm; 43. Adjusting arm; 431. First cantilever; 432. Second cantilever; 44. Adjusting rod; 45. Elastic member; 46. Fastening member; 5. Damping oil. Detailed implementation manners

[0021] The preferred implementation manners of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present invention and are not used to limit the protection scope of the present invention. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0022] It should be noted that in the description of the present invention, terms indicating directions or position relationships such as "inside", "left side", "right side", etc. are based on the directions or position relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the relevant devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, ordinal numbers such as "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0023] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0024] Based on the technical problems proposed in the background art, first refer to FIGS. 1(a) and 1(b), which are the noise data detected by an AC motor and a DC motor under no-load and with load, respectively. As shown in FIG. 1(a), this figure shows the test data of a four-pole AC motor. The load carried by this motor is two fans, an indoor fan and an outdoor fan, and the AC motor is supplied with a rated voltage of 115V. For the AC motor, when testing the motor noise without load, the actual speed of the motor is higher and the power is lower than when it is under rated load. From the data in FIG. 1(a), it can be seen that the noise of the motor with fans is much greater than the noise of the motor under no-load. However, the noise of the motor under no-load does not represent the individual noise of the motor when it is under load. This is because when the motor is under no-load, the motor power is very low, the current flowing through the motor is small, and the electromagnetic noise is small. As shown in FIG. 1(b), this figure shows the test data of a DC motor. Similarly, the load carried by this motor is two fans, an indoor fan and an outdoor fan, and the DC motor is supplied with a rated voltage of 115V. For the DC motor, the motor speed can be set by a program, but when there is no load, the corresponding motor power is also low. From the data in FIG. 1(b), it can be seen that the noise of the motor with fans is much greater than the noise of the motor under no-load. However, the noise of the motor under no-load does not represent the individual noise of the motor when it is under load, because when the motor is under no-load, although the speed is the same, the motor power is very low, the current flowing through the motor is small, and the electromagnetic noise is small. Therefore, the present invention provides a motor noise detection simulation load device, which can simulate the state of the motor when it is under load and at the same time will not generate additional noise like a fan, thereby improving the accuracy of motor noise detection.

[0025] Next, refer to Figure 2 , which is a schematic structural diagram of the motor noise detection simulation load device of the present utility model. As Figure 2 shown, the motor noise detection simulation load device includes a housing 1, a drive shaft 3, a transmission mechanism 2, and a pressure adjustment mechanism 4; the drive shaft 3 is rotatably arranged on the housing 1, one end of the drive shaft 3 is connected to the drive end of a motor (not shown in the figure), the other end of the drive shaft 3 is connected to the transmission mechanism 2, and the transmission mechanism 2 is arranged inside the housing 1; the pressure adjustment mechanism 4 is arranged to be able to contact the transmission mechanism 2 and be able to adjust the acting force between it and the transmission mechanism 2. By adjusting the magnitude of the acting force between the pressure adjustment mechanism 4 and the transmission mechanism 2, and then the motor drives the transmission mechanism 2 to rotate through the drive shaft 3 to simulate the rotation state of the motor when it is under load, so as to detect the noise of the motor in this state.

[0026] Continue as Figure 2As shown, the transmission mechanism 2 includes a first gear 21 and a second gear 22. The first gear 21 and the second gear 22 are respectively rotatably arranged in the housing 1. The first gear 21 is meshed and connected with the second gear 22. The other end of the drive shaft 3 is connected with the first gear 21, and the diameter of the first gear 21 is larger than that of the second gear 22. It should be noted that although the transmission mechanism 2 is described in combination with the gear meshing structure above, this is not restrictive. Those skilled in the art can also set the transmission mechanism 2 as a sprocket chain transmission mechanism, a pulley belt transmission mechanism, etc. During actual use, to ensure the stability of power transmission, the transmission mechanism 2 is preferably set as a structure with gear meshing connection. In addition, although the above is described in combination with the diameter of the first gear 21 being larger than that of the second gear 22, this is not restrictive. The diameter of the first gear 21 can be equal to the diameter of the second gear 22, or can be smaller than the diameter of the second gear 22. However, considering practicality, the diameter of the first gear 21 is preferably set to be larger than that of the second gear 22 because the pressure regulating mechanism 4 only needs to apply a smaller force to the small gear to generate resistance for it. Correspondingly, when the large gear drives the small gear, the motor only needs to output a smaller output torque to drive the transmission mechanism 2 to rotate, which is convenient for operation. Similarly, when the transmission mechanism 2 is set as a sprocket chain transmission mechanism 2, a pulley belt transmission mechanism 2, etc., the diameter of the sprocket or pulley connected to the drive shaft 3 is larger than the diameter of the sprocket or pulley in contact with the pressure regulating mechanism 4.

[0027] Continue as Figure 2As shown in the figure, the pressure regulating mechanism 4 includes a pressure member 41, an adjusting arm 43, a connecting arm 42, an adjusting rod 44, and a fastening member 46. There are two sets of the pressure member 41, the adjusting arm 43, and the connecting arm 42 respectively. The two sets of adjusting arms 43 are rotatably arranged on the left and right sides of the housing 1 respectively, the two sets of connecting arms 42 are slidably arranged on the left and right sides of the housing 1 respectively, and the two sets of pressure members 41 are arranged inside the housing 1 and are in contact with the left and right sides of the second gear 22. The pressure member 41, the connecting arm 42, and the adjusting arm 43 on the same side are connected to each other. The adjusting rod 44 passes through the two sets of adjusting arms 43 in sequence and is fixed by the fastening member 46. Specifically, the two sets of adjusting arms 43 are respectively hinged to the left and right sides of the housing 1. By loosening the fastening member 46, the adjusting arm 43 can slide relative to the adjusting rod 44 to adjust the position of the adjusting arm 43 on the adjusting rod 44. At the same time, the two sets of adjusting arms 43 rotate relative to the housing 1, and the two sets of connecting arms 42 slide relative to the housing 1 respectively to push the pressure member 41 to respectively squeeze the left and right sides of the second gear 22 and fix them by the fastening member 46, so as to realize the adjustment of the magnitude of the acting force between the pressure regulating mechanism 4 and the transmission mechanism 2, and further simulate the state when the motor is under load. Exemplarily, the pressure member 41 is set as a pressure block, and the fastening member 46 is set as a fastening bolt.

[0028] Continuing further as Figure 2 As shown in the figure, the adjusting arm 43 includes a first cantilever 431 and a second cantilever 432. One end of the first cantilever 431 is rotatably arranged on the housing 1, and the other end of the first cantilever 431 is angularly connected to one end of the second cantilever 432. The adjusting rod 44 passes through the other end of the second cantilever 432, and the length of the first cantilever 431 is less than the length of the second cantilever 432. The adjusting arm 43 uses the lever principle to realize the adjustment of the magnitude of the acting force between the pressure member 41 and the second gear 22. Specifically, by adjusting the tightness of the fastening member 46 on the second cantilever 432, the position of the second cantilever 432 on the adjusting rod 44 is adjusted, so that the second cantilever 432 drives the first cantilever 431 to rotate relative to the housing 1, driving the connecting arm 42 to slide relative to the housing 1, and further realizing the adjustment of the magnitude of the acting force between the pressure member 41 and the second gear 22. That is to say, since the length of the first cantilever 431 is less than the length of the second cantilever 432, only a little tightening of the fastening member 46 is required, and the acting force between the pressure member 41 and the second gear 22 will be relatively large, which is convenient for operation. Of course, the length of the first cantilever 431 can also be greater than the length of the second cantilever 432, but considering practicality, it is preferably that the length of the first cantilever 431 is less than the length of the second cantilever 432.

[0029] Continuing further as Figure 2As shown, the pressure regulating mechanism 4 further includes an elastic member 45. The elastic member 45 is disposed on the adjusting rod 44, and both ends of the elastic member 45 are respectively abutted against the adjusting rod 44 and the end face of the second cantilever 432. Specifically, the elastic member 45 will be compressed when the fastening member 46 is fastened, which can increase the fastening stroke of the fastening member 46, improve the fastening strength and the sensitivity during fastening. Exemplarily, the elastic member 45 is set as a spring. Of course, it can also be other members other than the spring, as long as it has an elastic effect.

[0030] Further, a sealing member (not shown in the figure) is provided between the housing 1 and the drive shaft 3 and the connecting arm 42 respectively. Exemplarily, the sealing member is set as a sealing rubber. Of course, it can also be other members other than the sealing rubber, as long as it plays a sealing role.

[0031] Continue again as Figure 2 As shown, the housing 1 is filled with damping oil 5. The damping oil 5 has a buffering effect, which can ensure the smooth rotation of the drive shaft 3 connected to the drive end of the motor, and at the same time has the effect of reducing noise, avoiding interference with the detection of the motor noise.

[0032] Based on the above motor noise detection simulation load device, the present utility model further provides a motor noise detection device, including a noise sensor (not shown in the figure) and the above-mentioned motor noise detection simulation load device, and the noise sensor is disposed close to the motor noise detection simulation load device.

[0033] The working principle of the motor noise detection simulation load device will be described in detail below.

[0034] When detecting the noise of an AC motor, by adjusting the magnitude of the force between the pressure regulating mechanism 4 and the transmission mechanism 2, and then adjusting the speed of the motor, so that the speed of the motor is adjusted to the rated speed when actually driving a load. At this time, the resistance of the motor noise detection simulation load device is consistent with the resistance of the actual load, and then the noise at this speed is detected by the noise sensor under the drive of the motor.

[0035] When detecting the noise of a DC motor, first set the motor speed to the rated speed, detect the motor power, and by adjusting the magnitude of the force between the pressure regulating mechanism 4 and the transmission mechanism 2, adjust the motor power to the power magnitude when actually driving a load at the rated speed. At this time, the resistance of the motor noise detection simulation load device is consistent with the resistance of the actual load, and then the noise at this speed is detected by the noise sensor under the drive of the motor.

[0036] So far, the technical solution of the present utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easily understood by those skilled in the art that the protection scope of the present utility model is obviously not limited to these specific embodiments. Without departing from the principle of the present utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present utility model.

Claims

1. A motor noise detection simulation load device, characterized in that: The motor noise detection simulation load device comprises a housing, a drive shaft, a transmission mechanism and a pressure regulating mechanism; The drive shaft is rotatably arranged on the housing, one end of the drive shaft is connected to the driving end of the motor, and the other end of the drive shaft is connected to the transmission mechanism, and the transmission mechanism is arranged in the housing; The pressure regulating mechanism is configured to be in contact with the transmission mechanism and to be able to adjust the acting force between the pressure regulating mechanism and the transmission mechanism.

2. The motor noise detection simulation load device according to claim 1, characterized in that: The transmission mechanism includes a first gear and a second gear. The first gear and the second gear are respectively rotatably arranged in the housing. The first gear is meshed and connected with the second gear. The other end of the driving shaft is connected to the first gear.

3. The motor noise detection simulation load device according to claim 2, characterized in that: A diameter of the first gear is greater than a diameter of the second gear.

4. The motor noise detection simulation load device according to claim 3, characterized in that: The pressure adjustment mechanism includes a pressure component, an adjustment arm, a connecting arm, an adjustment rod and a fastening component. The pressure component, the adjustment arm and the connecting arm are respectively provided in two groups. The two groups of adjustment arms are respectively rotatably provided on the left and right sides of the shell. The two groups of connecting arms are respectively slidably provided on the left and right sides of the shell. The two groups of pressure components are respectively provided in the shell and contact with the left and right sides of the second gear. The pressure component, the connecting arm and the adjustment arm on the same side are connected to each other. The adjustment rod passes through the two groups of adjustment arms in sequence and is fixed by the fastening component.

5. The motor noise detection simulation load device according to claim 4, characterized in that: The adjusting arm comprises a first cantilever and a second cantilever, one end of the first cantilever is rotatably arranged on the shell, the other end of the first cantilever is connected to one end of the second cantilever at an angle, and the adjusting rod passes through the other end of the second cantilever.

6. The motor noise detection simulation load device according to claim 5, characterized in that: The length of the first cantilever is smaller than the length of the second cantilever.

7. The motor noise detection simulation load device according to claim 4, characterized in that: The pressure regulating mechanism further comprises an elastic component, which is arranged on the regulating rod, and two ends of the elastic component are respectively in contact with end surfaces of the regulating rod and the regulating arm.

8. The motor noise detection simulation load device according to claim 5, characterized in that: A sealing member is disposed between the housing, the driving shaft and the connecting arm respectively.

9. The motor noise detection simulation load device according to claim 1, characterized in that: The housing is filled with damping oil.

10. A motor noise detection device, characterized in that: It comprises a noise sensor and a motor noise detection simulation load device as claimed in any one of claims 1 to 9, wherein the noise sensor is arranged close to the motor noise detection simulation load device.

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