CN202393562U - Supporting type soft bearing and hard bearing integrated multifunctional dynamic balancing machine - Google Patents

Abstract

The utility model discloses a supporting multifunctional dynamic balancing machine integrated with soft and hard supports, which comprises a soft support swing frame, a hard support swing frame, and a swing frame conversion mechanism. On the support swing frame, the swing frame conversion mechanism includes a first slider, a second slider, a first screw mechanism, and a second screw mechanism. The first slider and the second slider are respectively located on both sides of the soft support swing frame. A screw mechanism is connected with the first slider, and the second screw mechanism is connected with the second slider. The utility model realizes the conversion between the hard support mode and the soft support mode through the pendulum conversion mechanism, has the advantages of both the soft support and the hard support, and saves costs.

Description

Support type soft and hard support integrated multifunctional dynamic balancing machine

technical field

The utility model relates to a mechanical dynamic balance measuring device for rotary motion, in particular to a support type multifunctional dynamic balance machine integrated with soft and hard supports.

Background technique

Existing dynamic balancing machines are divided into hard bearing balancing machines and soft bearing balancing machines from the working principle. Both soft bearing dynamic balancing machines and hard bearing dynamic balancing machines have their own advantages and disadvantages.

The balance speed of the soft-support dynamic balancing machine is higher than the natural frequency of the rotor support system, which is less affected by external vibration signals, has high measurement accuracy, large amplitude, high sensitivity, small pendulum stiffness, thin structure, and excessive vibration when the resonance speed is exceeded. , does not allow large initial unbalance, poor impact resistance, suitable for mass production, each balance of different rotors must be calibrated, the operation is more cumbersome, requiring the operator to have certain experience.

The balance speed of the hard support dynamic balancing machine is lower than the natural frequency of the rotor support system, and it can be balanced at low speed, with permanent calibration, simple and convenient operation, good safety performance, small amplitude, high rigidity of the pendulum frame, high strength, and allows the rotor It has the characteristics of large initial unbalance, strong structure, impact resistance, no wearing parts, and high reliability.

The difference in working principle between the soft bearing dynamic balancing machine and the hard bearing dynamic balancing machine will inevitably lead to the difference in structure and operation method. Careful analysis is required when selecting, and the appropriate type of dynamic balancing machine should be selected according to different balancing requirements.

The soft bearing dynamic balancing machine is suitable for the following occasions: 1) Light and small rotors, rotor components with few specifications; 2) Fully automatic and semi-automatic balancing on the production line of large-scale rotors, such as micro-motor rotors, supercharger impellers, etc. A limited set of calibration data can be stored in the measuring instrument, which is used as a permanent calibration; 3) Some special balancing tasks, such as the balancing of navigation gyroscopes (using self-driving and high speed); 4) Particularly light and small rotors, Such as dental drill turbine, etc. (unbalanced vibration force is small, and it is more convenient to measure eccentric displacement).

The hard support dynamic balancing machine is suitable for medium and large rotors, and is mostly used for the rotor body. Mass production, such as automobile crankshafts, is characterized by fewer rotor specifications, but requires higher impact resistance; 3) Most of them belong to single-piece or small and medium-sized batch production or maintenance of rotors, and there are many types of rotor specifications that need to be balanced; 4) High-speed dynamic balancing of flexible rotors.

The dynamic balancing machines currently on the market are either a single hard bearing dynamic balancing machine or a single soft bearing dynamic balancing machine, lacking a multi-kinetic dynamic balancing machine that integrates soft bearings and hard bearings. With the development of science and technology and the needs of industrial technology, hard bearing dynamic balancing machines and soft bearing dynamic balancing machines have advantages in different fields. The hard-supported dynamic balancing machine has a balance speed lower than the natural frequency of the rotor support system, requiring ω≤0.3ωo (natural frequency), and requiring a high natural frequency. The soft bearing dynamic balancing machine has a balance speed higher than the natural frequency of the rotor support system, requiring ω≥2.5ωo (natural frequency), and requiring a low natural frequency. The vibration amplitude of the hard bearing balancing machine is proportional to the unbalanced centrifugal force, and the vibration amplitude of the soft bearing balancing machine is proportional to the eccentric displacement.

Utility model content

The technical problem to be solved by the utility model is to provide a multifunctional dynamic balancing machine integrated with soft and hard supports, which has the advantages of soft supports and hard supports, and saves costs.

In order to solve the above-mentioned technical problems, the utility model provides a multifunctional dynamic balancing machine integrated with soft and hard supports, which is characterized in that it includes a soft support swing frame, a hard support swing frame, a swing frame conversion mechanism, and a swing frame conversion mechanism. The mechanism is located on both sides of the soft support swing frame and above the hard support swing frame. The swing frame conversion mechanism includes the first slider, the second slider, the first screw mechanism, the second screw mechanism, the first slider, the second slider They are respectively located on both sides of the soft support swing frame, the first screw mechanism is connected with the first slider, and the second screw mechanism is connected with the second slider.

Preferably, the soft support swing frame includes a first base, a first reed, a second reed, a first roller, a second roller, a roller frame, a bracket, and a soft support projection, and the first roller and the second roller are located at On the roller frame, the roller frame is slidably connected with the support, the first reed and the second reed are located on the first base, and the soft bearing projection is connected with the first base.

Preferably, the hard support swing frame adopts an H-shaped integral structure, and the first screw mechanism and the second screw mechanism are both composed of a handle part and a threaded part.

The positive and progressive effect of the utility model lies in: the utility model has the advantages of both soft support and hard support. There are two sets of swing frames, one is a soft support swing frame, and the other is a hard support swing frame. The frame can be converted by the swing frame conversion mechanism. Combining the advantages of soft support and hard support can broaden the application range of dynamic balancing machines and greatly save the cost of enterprises. The utility model can not only be used for the dynamic balance of small-sized rotors, but also can be used for the dynamic balance of large-sized rotors, and can be used for high-speed balancing and low-speed balancing.

Description of drawings

Fig. 1 is the front view of the multi-function dynamic balancing machine with integrated soft and hard support of the utility model.

Fig. 2 is a three-dimensional view of the multi-function dynamic balancing machine with integrated soft and hard support of the utility model.

Fig. 3 is a structural schematic diagram of the screw mechanism in the utility model.

Fig. 4 is a schematic structural diagram of the slider in the present invention.

Detailed ways

A preferred embodiment is given below, and the utility model is described more clearly and completely in conjunction with the accompanying drawings.

The utility model support type soft and hard support integrated multifunctional dynamic balancing machine comprises a soft support swing frame, a hard support swing frame 11, a swing frame conversion mechanism, and a safety device. The soft support swing frame includes a first base, a first reed, a second Reeds, first rollers, second rollers, roller racks, brackets, soft support bumps, the swing frame conversion mechanism is located on both sides of the soft support swing frame and above the hard support swing frame 11, and the swing frame conversion mechanism includes the first slider 10. The second slider 16, the first screw mechanism 9, and the second screw mechanism 14. The first slider 10 and the second slider 16 are respectively located on both sides of the soft support swing frame. The first screw mechanism 9 and the first slider The block 10 is connected, and the second screw mechanism 14 is connected with the second slider 16 . The safety device includes a pressure roller block 1 and a safety frame 2. The pressure wheel block 1 is located on the safety frame 2, and the pressure wheel block 1 can be adjusted up and down to suit rotors of different sizes. The pressure wheel block 1 and the safety frame 2 play a protective role to prevent the rotor from moving up and down.

The soft support rocker comprises the first base 8, the first reed 6, the second reed 15, the first roller 3, the roller frame 4, the support 5, the soft support projection 7 and the second roller 17, the first roller 3 and the second roller 17. The second roller 17 is located on the roller frame 4, the roller frame 4 is slidingly connected with the support 5, the first reed 6 and the second reed 15 are located on the first base 8, and the soft bearing bump 7 is connected with the first base 8, and the measurement The displacement sensor in the system is fixed on the soft bearing bump 7 connected with the first base 8 . The balance speed of the soft bearing dynamic balancing machine is higher than the natural frequency of the rotor support system, requiring ω≥2.5ωo (ωo is the natural frequency), and the natural frequency is very low, usually about 1.5Hz to 5Hz. In this way, the rigidity of the spring bar of the soft support is very low. In the vibration system of the soft support and weighing machine, the pendulum can be suspended by the reed or supported by the spring bar. Due to the support of the spring bar, the spring bar is very long, and its stiffness If it is very low, the stability will not meet the needs. In order to make the stiffness low and the stability meet the requirements, the spring rod can be designed as a variable-section rod.

The hard support swing frame 11 adopts an H-shaped integrated structure. The first screw mechanism 9 and the second screw mechanism 14 are composed of a handle part and a threaded part. By rotating the first screw mechanism 9 and the second screw mechanism 14, the first screw mechanism on the corresponding side The slide block 10 and the second slide block 16 will move left and right, thereby realizing the mutual conversion between the soft support pendulum mode and the hard support pendulum mode. When the two slide blocks moved to the two outer sides respectively, the soft support pendulum came into play at this moment. The vibration amplitude of the soft bearing balancing machine is proportional to the eccentric displacement, so the sensor used is a displacement sensor. In soft support mode, the equilibrium speed is higher than the natural frequency of the rotor support system. When the convex parts of the first slide block 10 and the second slide block 16 are embedded in the grooves of the soft support swing frame, the hard support mode is entered. If only two sliders are placed on one side of the pendulum and put on the same screw mechanism, the precision requirements are very high, otherwise it is easy to cause over-positioning, or an external force is applied to the pendulum, resulting in poor measurement results. Put a slider on each side to prevent over-positioning. When in the hard support mode, the convex design of the first slider 10 and the second slider 16 makes the slider participate in the bearing in the hard support mode, so that there is a higher bearing capacity in the hard support mode, so that it can be carried out Dynamic balancing of larger rotors. The balance vibration amplitude of the hard support is proportional to the unbalanced centrifugal force, so the sensor used in the hard support mode is a piezoelectric force sensor.

The other parts adopt the classic structure of the dynamic balancing machine. For example, the entire frame is placed on the guide rail of the second base 13, and the distance required by different types of rotors can be met by moving the distance between the two frames. Ribs 12 are arranged on the second base 13 to improve rigidity, and the inside of the second base is partially hollow to save cost.

During transportation, rotate the first screw mechanism 9 and the second screw mechanism 14 to embed the protruding part of the slider into the groove of the soft support pendulum, at this time the slider can play the role of a soft support protection device.

Before using the soft support mode, turn the first screw mechanism 9 and the second screw mechanism 14 first, and embed the convex part of the slider into the groove of the soft support swing frame, so as to prevent the soft support swing frame from swinging too much. destroy. If the initial unbalance of the rotor is large, the dynamic balance should be carried out in the hard support mode first, and then the dynamic balance in the soft support mode. When the two slide blocks moved to the two outer sides respectively, the soft support pendulum came into play at this moment. The vibration amplitude of the soft bearing balancing machine is proportional to the eccentric displacement, so the sensor used is a displacement sensor. In soft support mode, the equilibrium speed is higher than the natural frequency of the rotor support system. When the convex parts of the first slide block 10 and the second slide block 16 are embedded in the grooves of the soft support swing frame, the hard support mode is entered.

Although the specific embodiments of the present utility model have been described above, those skilled in the art should understand that these are only examples, and various modifications can be made to these embodiments without departing from the principle and essence of the present utility model. change or modification. Therefore, the protection scope of the present utility model is defined by the appended claims.

Claims (3)

1. A support type soft and hard support integrated multifunctional dynamic balancing machine is characterized in that it includes a soft support pendulum, a hard support pendulum, a pendulum conversion mechanism, and the pendulum conversion mechanism is located on both sides of the soft support pendulum, On the hard support swing frame, the swing frame conversion mechanism includes a first slider, a second slider, a first screw mechanism, and a second screw mechanism. The first slider and the second slider are respectively located on both sides of the soft support swing frame. The first screw mechanism is connected with the first slider, and the second screw mechanism is connected with the second slider. 2. The supported multifunctional dynamic balancing machine with soft and hard supports as claimed in claim 1, wherein the soft support pendulum includes a first base, a first reed, a second reed, a first roller, The second roller, roller frame, bracket, soft support bump, the first roller and the second roller are located on the roller frame, the roller frame is slidingly connected with the bracket, the first reed and the second reed are located on the first base, and the soft support The bump is connected with the first base. 3. The support type multi-function dynamic balancing machine with soft and hard support as claimed in claim 1, wherein the hard support pendulum adopts an H-shaped integrated structure, and the first screw mechanism and the second screw mechanism are all controlled by the handle part. and threaded parts.

Images