CN206311248U - A kind of rotary shaft destructive testing device under given moment of torsion - Google Patents

Abstract

The utility model discloses a destructive test device for a rotating shaft under a given torque, which comprises a driving motor, a clutch, a drive shaft, a flywheel, a rotating shaft to be tested, a universal joint, a first coupling, a torque sensor, a second Coupling, brake disc and workbench, drive motor is connected to one end of the driving shaft, a flywheel is installed on the driving shaft, the other end of the driving shaft is connected to one end of the rotating shaft to be tested through a universal joint, and the rotating shaft to be tested is connected to the first Bearing housing, first coupling, torque sensor, second coupling, second bearing housing and brake disc. The utility model uses a flywheel with a large mass to provide the moment of inertia, and the drive motor only needs to drive the flywheel to a specified speed, so the drive motor can be an ordinary motor, which greatly reduces the cost of the equipment; the flywheel is used as the impact source, Controlling the quality of the flywheel and the braking time of the brake disc can control the size of the impact torque of different sizes, so as to adapt to the test of different torques.

Description

A destructive test device for a rotating shaft under a given torque

technical field

The utility model relates to the technical field of torque testing, in particular to a destructive testing device for a rotating shaft under a given torque.

Background technique

The rotating shaft must be used to connect the main parts of the product, and is used to rotate the shaft that bears both bending moment and torque in the rotating work. The maximum torque that the rotating shaft can withstand directly affects the performance and use of the rotating shaft. Therefore, before the rotating shaft leaves the factory, it must pass a torque test, that is, a destructive test with a given maximum torque on the rotating shaft. Whether the rotating shaft will be twisted under the condition of the test, it can be used as a qualified product only after passing the inspection. Generally speaking, the method of measuring the torque of the rotating shaft is to use one end of the motor connected to the rotating shaft to drive the rotating shaft, the other end of the rotating shaft is connected to the brake disc, and a torque sensor for measuring torque is also connected to the rotating shaft. For some rotating shafts with low torque requirements, this method can indeed measure the torque of the rotating shaft, but for rotating shafts with high torque, this method cannot be directly carried out, because the maximum torque needs to be provided by the motor. The power is very high. In fact, it is impossible to buy ready-made high-power motors or the cost of using high-power motors is too high, which does not meet the needs of actual production cost reduction. Therefore, it is particularly necessary to design a torque testing method and device for a rotating shaft that can achieve a relatively large torque with an ordinary motor.

Utility model content

The purpose of the utility model is to solve the problem that in the existing torque test method of the rotating shaft, the test method of the rotating shaft with a large torque cannot be performed due to the limitation of the power of the motor, and to provide a test method with a larger torque that can be realized by using an ordinary motor under a given torque. Rotating shaft destructive test method and its device.

The utility model realizes above-mentioned purpose through following technical scheme:

A destructive test device for a rotating shaft under a given torque, including a driving motor, a clutch, a driving shaft, a flywheel, a rotating shaft to be tested, a universal joint, a first coupling, a torque sensor, a second coupling, and a brake disc and workbench, the drive motor is connected to one end of the drive shaft through a clutch, and a flywheel is installed on the drive shaft, and the drive shaft is supported by the third bearing seat and the fourth bearing seat arranged on the workbench. The other end of the shaft is connected to one end of the rotating shaft to be tested through a universal joint, and the rotating shaft to be tested is sequentially connected to the first bearing seat, the first shaft coupling, the torque sensor, the second shaft coupling, the second bearing seat and the brake disc, the rotating shaft to be measured is supported by the first bearing seat and the second bearing seat, and the rotating shaft to be measured and the driving shaft are all arranged horizontally; the brake disc, the driving motor, the first bearing seat, and the second bearing seat, the third bearing seat and the fourth bearing seat are all fixed on the workbench, the rotating shaft to be tested, the first bearing seat, the first coupling, the torque sensor, the second coupling, the second bearing seat and The axes of the brake discs are on the same straight line.

Further, an angle of 120-180 degrees is formed between the driving axis and the rotation axis to be measured.

Further, the drive motor is fixed on the workbench through the motor base.

Further, the flywheel is a disc-shaped flywheel with uniform mass distribution.

The beneficial effect of the utility model lies in that the utility model utilizes a flywheel with a large mass to provide the moment of inertia, and the drive motor only needs to drive the flywheel to a specified speed, and there is no time requirement. Therefore, the drive motor can be an ordinary motor, which greatly The cost of the equipment is reduced; the flywheel is used as the impact source, and the actual required torque is directly provided by the flywheel. By controlling the quality of the flywheel and the braking time of the brake disc, the impact torque of different sizes can be controlled, so as to adapt to the test of different torques; Torque The sensor is used to detect the actual torque value of the rotating shaft to be tested in the destructive test, which is convenient for understanding the magnitude and change of the torque value during the test; the utility model can not only measure the torque of the rotating shaft to be tested, but also measure the torque of the rotating shaft, Maximum torque for rotating shafts on workpieces such as cardan joints and certain automotive parts for drive shafts.

Description of drawings

Fig. 1 is a structural schematic diagram of a rotating shaft destructive test device under a given torque according to the utility model.

In the figure, 1-drive motor, 2-driving shaft, 3-flywheel, 4-rotating shaft to be tested, 5-universal joint, 6-first coupling, 7-torque sensor, 8-second coupling , 9-first bearing seat, 10-second bearing seat, 11-third bearing seat, 12-fourth bearing seat, 13-brake disc, 14-workbench, 15-clutch.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in Figure 1, a rotating shaft destructive test device under a given torque includes a driving motor 1, a clutch 15, a driving shaft 2, a flywheel 3, a rotating shaft to be tested 4, a universal joint 5, and a first shaft coupling device 6, torque sensor 7, second coupling 8, brake disc 13 and workbench 14, the drive motor 1 is connected to one end of the driving shaft 2 through a clutch 15, and a flywheel 3 is installed on the driving shaft 2, and the The driving shaft 2 is supported by the third bearing seat 11 and the fourth bearing seat 12 arranged on the workbench 14, and the other end of the driving shaft 2 is connected to one end of the rotating shaft 4 to be measured through a universal joint 5, and the rotating shaft to be measured is The shaft 4 is sequentially connected to the first bearing seat 9, the first shaft coupling 6, the torque sensor 7, the second shaft coupling 8, the second bearing seat 10 and the brake disc 13, and the rotating shaft 4 to be measured passes through the first bearing seat 9 and the second bearing seat 10 are supported, and the rotating shaft 4 to be measured and the driving shaft 2 are all set horizontally; the brake disc 13, the drive motor 1, the first bearing seat 9, the second bearing seat 10, the third bearing The seat 11 and the fourth bearing seat 12 are all fixed on the workbench 14, the rotating shaft 4 to be measured, the first bearing seat 9, the first coupling 6, the torque sensor 7, the second coupling 8, the second The axial centers of the bearing housing 10 and the brake disc 13 are located on the same straight line.

The angle between the driving shaft 2 and the rotating shaft 4 to be measured is 120-180 degrees, and the optimum angle between the driving shaft 2 and the rotating shaft 4 to be measured is 150 degrees.

The drive motor 1 is fixed on the workbench 14 through a motor base. The motor base is fixed on the workbench 14 by bolts, and the drive motor 1 is fixed on the motor base by bolts.

The flywheel 3 is a disk-shaped flywheel with uniform mass distribution. The mass of the flywheel 3 is relatively large, and the driving motor 1 only needs to provide a normal rotational speed to drive the flywheel 3 to rotate to provide a larger moment of inertia to the flywheel 3, thereby realizing a larger impact torque when the rotating shaft 4 to be tested is braked in an emergency.

The utility model is suitable for the impact torque measurement of the rotating shaft to be tested, and is also suitable for the impact torque measurement of the automobile parts integrally composed of the rotating shaft to be tested, the drive shaft and the universal joint. The utility model has high measurement accuracy and low cost of the whole set of equipment.

The concrete test method of the present utility model is as follows:

A rotating shaft destructive test method under a given torque, a flywheel 3 is installed on the driving shaft 2 connected to the drive motor 1, and the other end of the driving shaft 2 is connected to the rotating shaft 4 to be tested through a universal joint 5 One end, the other end of the rotating shaft 4 to be tested is sequentially connected to the first coupling 6, the torque sensor 7, the second coupling 8 and the brake disc 13, and the drive motor 1 drives the flywheel 3 on the driving shaft 2 to rotate, and the flywheel 3 When the specified rotational speed N is reached, the brake disc 13 is controlled to complete the braking within the specified braking time s, and the torque sensor 7 connected to the rotating shaft 4 to be measured is used to detect the magnitude and magnitude of the torque received by the rotating shaft 4 during braking. torque limit.

The braking braking time s of the brake disc 13 and the moment of inertia J of the flywheel 3 directly affect the maximum torque value M of the rotating shaft 4 to be measured, and its calculation formula is:

In the formula, w ₀ is the angular velocity of the flywheel 3 at the beginning of the braking time s, and w is the angular velocity of the flywheel 3 at the end of the braking time s. Since the final state of the flywheel 3 is completely stationary, w=0.

The flywheel 3 is disc-shaped with uniform mass distribution, and the calculation formula of the moment of inertia J of the flywheel 3 is:

In the formula, M is the mass of the flywheel 3, and R is the radius of the flywheel 3.

The drive motor 1 is connected to the drive shaft 2 through a clutch 15, and the clutch 15 disengages the drive shaft 2 from the drive motor 1 when the flywheel 3 reaches a specified speed N.

The above-described embodiments are only preferred embodiments of the present utility model, and are not limitations to the technical solutions of the present utility model. As long as the technical solutions that can be realized on the basis of the above-mentioned embodiments without creative work, all should be regarded as falling into the scope of this invention. within the protection scope of utility model patents.

Claims (5)

1. a rotating shaft destructive test device under a given torque, characterized in that: comprising drive motor (1), clutch (15), driving shaft (2), flywheel (3), rotating shaft to be measured (4) , universal joint (5), first coupling (6), torque sensor (7), second coupling (8), brake disc (13) and workbench (14), the drive motor (1 ) is connected to one end of the driving shaft (2) through a clutch (15), the flywheel (3) is installed on the driving shaft (2), and the driving shaft (2) passes through the third bearing arranged on the workbench (14) The seat (11) and the fourth bearing seat (12) are supported, and the other end of the driving shaft (2) is connected to one end of the rotating shaft (4) to be measured through a universal joint (5), and the rotating shaft (4) to be measured is Connect the first bearing housing (9), the first coupling (6), the torque sensor (7), the second coupling (8), the second bearing housing (10) and the brake disc (13) in sequence, the The rotating shaft (4) to be measured is supported by the first bearing seat (9) and the second bearing seat (10), and the rotating shaft (4) to be measured and the driving shaft (2) are all horizontally arranged; the brake disc ( 13), the drive motor (1), the first bearing seat (9), the second bearing seat (10), the third bearing seat (11) and the fourth bearing seat (12) are all fixed on the workbench (14), The rotating shaft (4) to be measured, the first bearing seat (9), the first coupling (6), the torque sensor (7), the second coupling (8), the second bearing housing (10) and The axis of brake disc (13) is located on the same straight line. 2. The rotating shaft destructive test device under a given torque according to claim 1, characterized in that an angle of 120-180 degrees is formed between the driving shaft (2) and the rotating shaft (4) to be tested . 3. The rotating shaft destructive test device under a given torque according to claim 2, characterized in that: the optimal angle between the driving shaft (2) and the rotating shaft (4) to be tested is 15° Spend. 4. The destructive test device for a rotating shaft under a given torque according to claim 1, characterized in that: the driving motor (1) is fixed on the workbench (14) through a motor base. 5. The destructive test device for a rotating shaft under a given torque according to claim 1, characterized in that: the flywheel (3) is a disk-shaped flywheel with uniform mass distribution.