CN214010613U - Extremely slow rotating speed static torque testing equipment - Google Patents

Abstract

The utility model provides a quiet moment of torsion test equipment of extremely slow rotating speed belongs to mechanical transmission and detects technical field. The utility model discloses a quiet torsion test equipment of extremely slow rotating speed is used for testing permanent magnet coupling's peak torque, including torque sensor, speed reducer, motor and converter, the permanent magnet coupling output loops through the external rotor and connects frock, intermediate shaft subassembly and torque sensor and be connected with the speed reducer, and the speed reducer is connected with the motor, and the motor is controlled by the converter. The utility model discloses when the peak value moment of torsion of test permanent magnet coupling, the running frequency of motor is set for by the converter, guarantees that the motor low-speed operation does not lose the motor moment of torsion simultaneously, and under the effect of speed reducer, motor moment of torsion enlargies and the rotational speed further reduces to the test of permanent magnet coupling is realized to the extremely slow rotational speed, reduces the damage to permanent magnet coupling.

Description

Extremely slow rotating speed static torque testing equipment

Technical Field

The utility model relates to a mechanical transmission and detection technical field, concretely relates to quiet moment of torsion test equipment of extremely slow rotating speed.

Background

The synchronous permanent magnet coupler mainly comprises a driving permanent magnet rotor and a driven permanent magnet rotor, and torque is transmitted by means of magnetic blocks of the inner rotor and the outer rotor. Taking a permanent magnet coupler of a certain type in the market as an example, the nominal torque of the product is 3150Nm, the maximum torque of the product is 7875Nm, the magnetic blocks of the inner rotor and the outer rotor of the coupler are 7.5 degrees each, and 48 magnetic blocks are arranged in a circle; when the magnetic block type synchronous motor works normally, the inner rotor and the outer rotor are driven by magnetic force and rotate synchronously, and the magnetic blocks cannot slip; however, in actual operation, if the load is too large, slipping (inconsistent rotation speeds of the inner and outer rotors) of the inner and outer rotors may occur, and the moment during slipping is the peak torque of the product; when slipping occurs, the mechanical vibration of the product is large, and a large eddy current can be generated, so that the product is rapidly heated, and the product is finally damaged; and is likely to further cause system damage to the user. Therefore, in the design and manufacturing process of the permanent magnet coupling, the manufactured permanent magnet coupling needs to be subjected to peak torque test to verify the design and ensure the delivery quality. During testing, starting the motor to load the test torque until the magnetic block slips, recording the peak torque by the torque meter, completing the test, and stopping the motor; in the test process, the rotating speed of the motor cannot be too fast, otherwise, the product can slip for many times in a short time, and the product is damaged.

SUMMERY OF THE UTILITY MODEL

Exist not enoughly among the prior art, the utility model provides a quiet moment of torsion test equipment of extremely slow rotational speed to extremely slow rotational speed realizes reducing the damage to permanent magnet coupling's test.

The utility model discloses a realize above-mentioned technical purpose through following technological means.

A kind of extremely slow rotational speed static torque test equipment, including permanent magnet coupling, torque sensor, speed reducer, electrical machinery and frequency converter; the output end of the permanent magnet coupler is connected with a speed reducer through a torque sensor, the speed reducer is connected with a motor, and the motor is controlled by a frequency converter.

In the technical scheme, an outer rotor connecting tool and a middle shaft assembly are sequentially connected between the output end of the permanent magnet coupler and the torque sensor.

In the technical scheme, the input end of the permanent magnet coupler is connected with an inner rotor connecting tool, and the inner rotor connecting tool is fixed to the upper end of the fixed tailstock.

In the technical scheme, the fixed tailstock is fixed on the dovetail groove sliding table, and the dovetail groove sliding table is fixed on the test bed base.

In the technical scheme, the intermediate shaft assembly torque sensor is fixed at the upper end of the intermediate fixing support, and the intermediate fixing support is fixed on the test bed base.

In the technical scheme, the speed reducer is fixed on the base of the test bed through the speed reducer mounting bracket.

In the technical scheme, the frequency converter is connected with the line control panel switch.

In the technical scheme, the torque sensor is connected with a computer.

The utility model has the advantages that:

(1) in the utility model, the output end of the permanent magnet coupler is connected with the speed reducer sequentially through the outer rotor connecting tool, the middle shaft assembly and the torque sensor, the speed reducer is connected with the motor, and the rotating speed of the motor is controlled by the frequency converter; the utility model discloses when the peak value moment of torsion of test permanent magnet coupling, at first the running frequency of motor is set for by the converter, guarantees that the motor low-speed operation does not lose the motor moment of torsion simultaneously, and further under the effect of speed reducer, motor moment of torsion enlargies and the rotational speed reduces to the test of permanent magnet coupling is realized to the extremely slow rotational speed, reduces the damage to permanent magnet coupling.

(2) The utility model discloses still fix dovetail slip table on the test bench base, dovetail slip table centering when first school transfers the test bench, during the moment of torsion of the different products of later test, only need through the axial position of the fixed tailstock of hand wheel adjustment to be suitable for the permanent magnet shaft coupling of different specifications, carry out the centering when need not test at every turn, the simple operation.

Drawings

FIG. 1 is a side view of the very slow rotating speed static torque force testing apparatus of the present invention;

FIG. 2 is a schematic structural view of the very slow rotating speed static torque force testing apparatus of the present invention;

in the figure, 1-dovetail groove sliding table, 2-fixed tailstock, 3-inner rotor connecting tool, 4-permanent magnet coupling, 5-outer rotor connecting tool, 6-middle shaft assembly, 7-middle fixed support, 8-torque sensor, 9-speed reducer mounting support, 10-speed reducer, 11-motor, 12-frequency converter, 13-line control panel switch and 14-test bed base.

Detailed Description

The invention will be further described with reference to the drawings and the following examples, but the scope of the invention is not limited thereto.

As shown in fig. 1 and 2, the extremely-slow rotating speed static torque testing device comprises a dovetail groove sliding table 1, a fixed tailstock 2, an inner rotor connecting tool 3, a permanent magnet coupler 4, an outer rotor connecting tool 5, an intermediate shaft assembly 6, an intermediate fixed support 7, a torque sensor 8, a speed reducer mounting support 9, a speed reducer 10, a motor 11, a frequency converter 12, a line control panel switch 13 and a test bed base 14.

A speed reducer mounting support 9, a middle fixing support 7 and a dovetail groove sliding table 1 are sequentially fixed on a test bed base 14 along the power transmission direction, a fixing tailstock 2 is fixed on the dovetail groove sliding table 1, one end of an inner rotor connecting tool 3 is fixed at the upper end of the fixing tailstock 2, the other end of the inner rotor connecting tool 3 is connected with the input end of a permanent magnet coupler 4, the output end of the permanent magnet coupler 4 is connected with one end of an outer rotor connecting tool 5, the other end of the outer rotor connecting tool 5 is connected with one end of an intermediate shaft assembly 6, the other end of the intermediate shaft assembly 6 is connected with one end of a torque sensor 8, the other end of the torque sensor 8 is connected; the intermediate shaft assembly 6 and the torque sensor 8 are fixed at the upper end of the intermediate fixing support 7, and the speed reducer 10 is fixed on the test bed base 14 through the speed reducer mounting support 9. The speed reducer mounting bracket 9 is provided with a frequency converter 12, the test bed base 14 is provided with a drive-by-wire panel switch 13, and the drive-by-wire panel switch 13 is used for controlling the work of the frequency converter 12. The torque sensor 8 is connected with a computer and used for recording the torque of the permanent magnet coupler 4 in the test process.

The utility model provides a dovetail slip table 1 centering when first school accent test bench, during the moment of torsion of the different products of later test, only need through the axial position of the fixed tailstock 2 of hand wheel adjustment to be suitable for the permanent magnet shaft coupling 4 of different specifications, carry out centering, simple operation when need not test at every turn. During testing, the test bed base 14 is fixed.

The utility model relates to a quiet moment of torsion test equipment of extremely slow rotating speed's theory of operation does: the motor 11 provides original driving torque, the drive-by-wire panel switch 13 controls the low-frequency operation of the frequency converter 12, the rotating speed of the motor 11 is greatly reduced without losing the motor torque, the motor torque is amplified and the rotating speed is further reduced under the action of the speed reducer 10, and finally the torque and the rotating speed required by the permanent magnet coupler 4 are achieved; the torque sensor 8 collects the torque in the test process and transmits the torque to the computer until slipping occurs.

Examples

The hardware mainly configured in this embodiment is: a 4Kw 4-pole motor 11(1435r/min), a reduction ratio i of the reduction gear 10 of 320:1(PXN285), a 7.5Kw inverter 12 and a 10000Nm torque sensor 8.

Theoretical calculation in the test process: (1) torque: the 4Kw motor 11 is matched with the speed reducer 10 with the speed ratio 320, the efficiency is 0.95, and the maximum torque T is 8091 Nm; (2) rotating speed: the frequency converter 12 sets the frequency to 5Hz, the motor 11 is operated, and at this time, the rotation speed n of the motor 11 is n1 × 5/50 is 143.5r/min, and the rotation speed is 0.45r/min (2.7 °/s) and is sufficiently slow when rotating by the width of one magnetic block for about 2.8s in cooperation with the speed ratio 320 of the speed reducer 10.

The embodiment is a preferred embodiment of the present invention, but the present invention is not limited to the above embodiment, and any obvious improvement, replacement or modification which can be made by those skilled in the art without departing from the essence of the present invention belongs to the protection scope of the present invention.

Claims (8)

1. A very slow rotating speed static torque testing device is characterized by comprising a permanent magnet coupler (4), a torque sensor (8), a speed reducer (10), a motor (11) and a frequency converter (12); the output end of the permanent magnet coupler (4) is connected with a speed reducer (10) through a torque sensor (8), the speed reducer (10) is connected with a motor (11), and the motor (11) is controlled by a frequency converter (12).

2. The extremely slow rotating speed static torque testing device according to claim 1, wherein an outer rotor connecting tool (5) and an intermediate shaft assembly (6) are sequentially connected between the output end of the permanent magnet coupling (4) and the torque sensor (8).

3. The very slow rotating speed static torque testing device according to claim 1, wherein an input end of the permanent magnet coupling (4) is connected with an inner rotor connecting tool (3), and the inner rotor connecting tool (3) is fixed at the upper end of the fixed tailstock (2).

4. The very slow rotating speed static torque testing device according to claim 3, wherein the fixed tailstock (2) is fixed on a dovetail groove sliding table (1), and the dovetail groove sliding table (1) is fixed on a test bed base (14).

5. The very slow rotating speed static torque testing device according to claim 2, wherein the middle shaft assembly (6) and the torque sensor (8) are fixed at the upper end of a middle fixing bracket (7), and the middle fixing bracket (7) is fixed on a test bed base (14).

6. The very slow rotational speed static torque testing apparatus according to claim 1, wherein the speed reducer (10) is fixed on a test stand base (14) by a speed reducer mounting bracket (9).

7. Very slow rotation speed static torque test device according to claim 1, characterized in that the frequency converter (12) is connected with a line control panel switch (13).

8. Very slow rotation speed static torque test device according to claim 1, characterized in that the torque sensor (8) is connected to a computer.

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