CN212254431U - Mechanism for detecting torque and rotating speed of motor in closed box - Google Patents
Mechanism for detecting torque and rotating speed of motor in closed box Download PDFInfo
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- CN212254431U CN212254431U CN202020609482.1U CN202020609482U CN212254431U CN 212254431 U CN212254431 U CN 212254431U CN 202020609482 U CN202020609482 U CN 202020609482U CN 212254431 U CN212254431 U CN 212254431U
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Abstract
The utility model relates to a mechanism for detecting the torque and the rotating speed of a motor in a closed box, which comprises a slide block and a lead screw; the screw rod can be installed in a rotating fit with the sliding block through the threaded hole, one end of the screw rod is connected with an output shaft of the tested motor, the other end of the screw rod can be rotatably arranged on the supporting seat, and the tested motor is arranged in the closed box; the sliding block is arranged on the slideway, and an output shaft of the tested motor drives the sliding block to slide along the slideway through a lead screw; two ends of the slideway are respectively provided with a travel switch SQ1And a stroke switch SQ2Each stroke ofThe switch is correspondingly connected with an indicator light; the stroke switch SQ1And a stroke switch SQ2And the timers are respectively connected with one timer, and the timers record the time from power-on to power-off of the corresponding travel switches. The utility model discloses the beneficial effect who reaches is: simple structure, simultaneous measurement of multiple items, convenient loading and observation and high detection precision.
Description
Technical Field
The utility model relates to the technical field of electric machines, especially a mechanism for detecting motor torque, rotational speed in the seal box.
Background
When the motor is designed, the motor is required to normally run with a load in a high-temperature, low-temperature and low-pressure test environment according to the general specification.
However, when the motor performance test is performed in a closed test box, the conventional torque and rotating speed test equipment cannot be simultaneously arranged, and the loading and observation are difficult.
Based on this, this scheme designs a mechanism for detecting motor torque, rotational speed in the seal box, not only is convenient for load and survey, and torque, rotational speed can test simultaneously.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's shortcoming, provide simple structure, multinomial simultaneous measurement, be convenient for the loading and survey, detect the high mechanism that is used for detecting motor torque, rotational speed in the airtight box of precision.
The purpose of the utility model is realized through the following technical scheme: the mechanism for detecting the torque and the rotating speed of the motor in the closed box comprises a sliding block and a lead screw;
the screw rod can be installed in a rotating fit with the sliding block through the threaded hole, one end of the screw rod is connected with an output shaft of the tested motor, the other end of the screw rod can be rotatably arranged on the supporting seat, and the tested motor is arranged in the closed box;
the sliding block is arranged on the slideway, and an output shaft of the tested motor drives the sliding block to slide along the slideway through a lead screw;
two ends of the slideway are respectively provided with a travel switch SQ1And a stroke switch SQ2Each travel switch is correspondingly connected with one indicator light;
the stroke switch SQ1And a stroke switch SQ2And the timers are respectively connected with one timer, and the timers record the time from power-on to power-off of the corresponding travel switches.
Furthermore, the lead screw is coaxially connected with an output shaft of the tested motor through a coupler.
Further, the lead screw is installed with the supporting seat in a matched mode through a bearing.
Furthermore, a high-temperature and low-temperature resistant lubricating grease layer is coated on the bearing of the support seat and the lead screw; and a high-temperature and low-temperature resistant lubricating grease layer is also coated on the contact part of the sliding block and the sliding way.
Preferably, the lead screw passes through the middle part of slider, the both ends of slider all set up with a slide adaptation, and only a slide both ends set up and be provided with travel switch SQ respectively1And a stroke switch SQ2。
Preferably, the tested motor is connected with the power supply through a double-pole double-throw switch, and the tested motor is also respectively connected with a stroke switch SQ1Corresponding indicator light circuit, travel switch SQ2Corresponding indicator light circuits are connected in parallel;
stroke switch SQ1The corresponding indicator light circuit comprises a corresponding diode, a resistor and an indicator light which are sequentially connected in series;
stroke switch SQ2The corresponding indicator light circuit comprises a corresponding diode, a resistor and an indicator light which are sequentially connected in series.
The utility model has the advantages of it is following:
(1) the rotation of the output shaft of the motor in the closed box is led out through the lead screw, and indirect data can be obtained through the slide block, the lead screw and the timer, so that the torque and the rotating speed of the motor can be obtained through calculation; moreover, test equipment does not need to be introduced into the closed box, so that the detection is convenient and the observation is convenient;
(2) because the setting of this scheme can not receive the interference of seal box internal environment, detects the precision height.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 shows the motor under test, the travel switch SQ1And a stroke switch SQ2A circuit schematic connected to a power supply;
in the figure: 1-slide block, 2-lead screw, 3-seal box, 4-support seat, 5-slideway and 6-bottom plate.
Detailed Description
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following description.
As shown in fig. 1 and 2, the mechanism for detecting the torque and the rotational speed of the motor in the sealed box comprises a bottom plate 6, a slider 1 and a screw rod 2, wherein two parallel slideways 5 are arranged on the upper surface of the bottom plate 6, the slider 1 is arranged on the two parallel slideways 5 in a matching manner, an internal thread is arranged in the middle of the slider 1, the screw rod 2 is arranged in the internal thread in a matching manner, one end of the screw rod 2 is arranged on a supporting seat 4 through a bearing, the other end of the screw rod 2 is connected with an output shaft of the motor to be tested, the motor to be tested is positioned in the sealed box 3, and the output shaft of the motor; seal box 3 and supporting seat 4 all set up on bottom plate 6.
Two ends of one slide way 5 are respectively provided with a travel switch SQ1And a stroke switch SQ2The sliding block 1 respectively touches the travel switches SQ when sliding on the slideway 51And a stroke switch SQ2(ii) a Stroke switch SQ1And a stroke switch SQ2And the timers are respectively connected with one timer, and the timers record the time from power-on to power-off of the corresponding travel switches.
In this embodiment, each travel switch is associated with a corresponding indicator light for easy straight tube viewing.
In this embodiment, in order to facilitate the placement of the tested motor, the sealing box 3 is provided with a cover plate shell which can be uncovered.
When the seal box 3 is installed, the gap between the seal box 3 and the output shaft extension limiting end of the tested motor is adjusted according to the length of the screw rod 2, and meanwhile, the concentricity between the output shaft of the tested motor and the seal box 3 is adjusted, so that the tested motor, the screw rod 2 and the support seat 4 are basically kept on the same central line.
In the scheme, as shown in fig. 2, the tested motor is connected with the power supply through the double-pole double-throw switch, and the tested motor is also respectively connected with the stroke switches SQ1Corresponding indicator light circuit, travel switch SQ2Corresponding indicator light circuits are connected in parallel; stroke switch SQ1The corresponding indicator light circuit comprises a corresponding diode, a resistor and an indicator light which are sequentially connected in series; stroke switch SQ2The corresponding indicator light circuit comprises a corresponding diode, a resistor and an indicator light which are sequentially connected in series.
When the double-pole double-throw switch works, a power supply (a direct current power supply DCV) is connected, when the double-pole double-throw switch S is controlled to be thrown to be positive, the indicator lamp H1 is lightened, the tested motor rotates forwards to push the sliding block 1 to move forwards, and the sliding block 1 is contacted with the travel switch SQ1The normally closed contact is disconnected, the indicator lamp H1 is extinguished, and the tested motor stops rotating; similarly, when the double-pole double-throw switch S is thrown to the reverse direction, the indicator light H2 is on, the tested motor reversely rotates to push the sliding block 1 to move reversely, and the sliding block 1 contacts the stroke switch SQ2The normally closed contact is opened, the indicator lamp H2 is extinguished, and the tested motor stops rotating.
Meanwhile, the time between the turning-on and turning-off of the indicator light H1 or H2 is recorded by a timer, and then the timer is combined with the slider to turn on the SQ1And SQ2The moving distance (the moving distance of the sliding block 1 is measured in advance outside the test box) between the two rotating speeds is calculated respectively. The tested motor is used for driving the screw rod 2 to rotate, and the assembling slide block 1 with internal threads on the slide way 5 is pushed. The output torque of the motor can be directly converted according to the weight and the friction coefficient corresponding to the material of the slide block 1.
Namely, when the sliding block 1 slides at a constant speed, the friction force is the axial thrust FtThe friction force can be calculated according to the weight of the sliding block 1 and the friction of the material (the quality is adjusted in advance to ensure uniform motion); according to axial thrust FtThe screw lead l and the efficiency η can be calculated to obtain the transmission torque. For example:
where eta is the efficiency, lambda is the lead angle, rhovIs the rubbing angle.
Wherein T is a transmission torque (N.mm), FtFor axial thrust (N), η for efficiency, and l for screw lead (mm), the transmission torque T is calculated to be about 0.33N mm.
In the embodiment, in order to reduce the rotating speed test error, the screw rod 2 of the device should be lengthened as much as possible on the premise that the size of the seal box 2 allows.
In this embodiment, in order not to affect the accuracy of the test data, the test apparatus should be coated with high and low temperature resistant grease such as 7015 to maintain the friction coefficient consistent with that in a normal state, so as to ensure that the test data of the test apparatus at normal temperature and high and low temperatures are not affected by the change of environmental conditions, and at the same time, the test apparatus can also play a role in protection. Specifically, a high-temperature and low-temperature resistant lubricating grease layer is coated on the bearing of the support seat 4 and the lead screw 2; the contact part of the sliding block 1 and the slideway 5 is coated with a high-temperature and low-temperature resistant lubricating grease layer.
According to the actual condition of the tested motor and the difficulty degree of the test device, the internal thread on the sliding block 1 is a trapezoidal thread, and correspondingly, the lead screw 2 is also a trapezoidal thread type.
In the scheme, the rotating speed is calculated specifically as follows, and only d is calculated according to the specification of the threaded screw2For example, a trapezoidal thread screw specification M10 × 1.25 is selected and the pitch diameter d thereof is calculated2Comprises the following steps:
wherein d is a major diameter, d1Is a minor diameter;
and then calculating a thread lead angle lambda:
wherein p is the pitch;
selecting a friction coefficient of 0.08-0.10 according to the materials (steel to bronze) of the screw and the nut, comparing a rectangular thread with a non-rectangular thread, wherein the tooth form bevel angle gamma of the trapezoidal thread is 15 degrees, so that an equivalent friction angle rho is formedVThe calculation is as follows:
for example, when the output torque of the motor of 30SYJ01 is selected to be 0.3N × m, the thrust of the trapezoidal thread screw is calculated as follows:
wherein, FtThe screw axial thrust (N) is adopted, and T is the transmission torque (N.m);
when the tested motor works in the seal box 3, substituting v in the formula (7) into the formula (8) to calculate the rotating speed of the motor:
wherein v is the speed (mm/min) of the slide block, s is the moving distance (mm) of the slide block, and t is the moving time (min) of the slide block;
calculating the rotating speed n of the tested motor:
wherein n is the motor rotation speed (r/min) and l is the screw lead (mm).
That is, in the test, the time between the turning-on and turning-off of the indicator lamp H1 or H2 is recorded (stroke switch SQ)1Or a travel switch SQ2Power-up to power-down time), and then combining the sliders in SQ1And SQ2The moving distance (the moving distance of the sliding block is measured in advance outside the test box) is substituted into the formulas (5) and (6), and then the rotating speeds of the positive rotation and the negative rotation of the motor can be respectively calculated.
Claims (6)
1. A mechanism for detecting motor torque, rotational speed in the seal box, its characterized in that: comprises a slide block (1) and a lead screw (2);
the lead screw (2) can be installed with the sliding block (1) in a rotating fit mode through a threaded hole, one end of the lead screw (2) is connected with an output shaft of a tested motor, the other end of the lead screw (2) can be rotatably arranged on the supporting seat (4), and the tested motor is arranged in the closed box (3);
the sliding block (1) is arranged on the slideway (5), and an output shaft of a tested motor drives the sliding block (1) to slide along the slideway (5) through the lead screw (2);
two ends of the slideway (5) are respectively provided with a travel switch SQ1And a stroke switch SQ2Each travel switch is correspondingly connected with one indicator light;
the stroke switch SQ1And a stroke switch SQ2And the timers are respectively connected with one timer, and the timers record the time from power-on to power-off of the corresponding travel switches.
2. The mechanism for detecting the torque and the rotation speed of the motor in the closed box according to claim 1, is characterized in that: the lead screw (2) is coaxially connected with an output shaft of the tested motor through a coupler.
3. The mechanism for detecting the torque and the rotation speed of the motor in the closed box according to claim 2, is characterized in that: the lead screw (2) is installed with the supporting seat (4) in a matching mode through a bearing.
4. The mechanism for detecting the torque and the rotation speed of the motor in the airtight box as claimed in claim 3, wherein: a bearing part of the support seat (4) and the lead screw (2) is coated with a high and low temperature resistant lubricating grease layer;
the contact part of the sliding block (1) and the sliding way (5) is coated with a high and low temperature resistant lubricating grease layer.
5. The mechanism for detecting the torque and the rotating speed of the motor in the closed box according to any one of claims 1 to 4, characterized in that: lead screw (2) pass from the middle part of slider (1), the both ends of slider (1) all set up with a slide (5) adaptation, and only a slide (5) both ends set up and are provided with travel switch SQ respectively1And a stroke switch SQ2。
6. According to claim 5A mechanism for detecting motor torque, rotational speed in the seal box, its characterized in that: the tested motor is connected with a power supply through a double-pole double-throw switch and is also respectively connected with a stroke switch SQ1Corresponding indicator light circuit, travel switch SQ2Corresponding indicator light circuits are connected in parallel;
stroke switch SQ1The corresponding indicator light circuit comprises a corresponding diode, a resistor and an indicator light which are sequentially connected in series;
stroke switch SQ2The corresponding indicator light circuit comprises a corresponding diode, a resistor and an indicator light which are sequentially connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020609482.1U CN212254431U (en) | 2020-04-22 | 2020-04-22 | Mechanism for detecting torque and rotating speed of motor in closed box |
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| CN202020609482.1U CN212254431U (en) | 2020-04-22 | 2020-04-22 | Mechanism for detecting torque and rotating speed of motor in closed box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114441963A (en) * | 2022-04-08 | 2022-05-06 | 成都微精电机股份公司 | Rotary table structure for automatic testing of motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114441963A (en) * | 2022-04-08 | 2022-05-06 | 成都微精电机股份公司 | Rotary table structure for automatic testing of motor |
| CN114441963B (en) * | 2022-04-08 | 2022-06-21 | 成都微精电机股份公司 | Rotary table structure for automatic testing of motor |
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