CN216819602U

CN216819602U - Marine low-vibration noise motor shaft system dynamic balance adjustment structure

Info

Publication number: CN216819602U
Application number: CN202122889019.4U
Authority: CN
Inventors: 何兰香; 于京平; 苏迎宾; 韩素芳; 邱一航; 郭延杰; 万虎
Original assignee: Shanghai Junhai Special Electromechanical Equipment Technology Development Co ltd; Shanghai Electrical Apparatus Research Institute Group Co Ltd
Current assignee: Shanghai Junhai Special Electromechanical Equipment Technology Development Co ltd; Shanghai Electrical Apparatus Research Institute Group Co Ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-06-24
Anticipated expiration: 2031-11-24

Abstract

The application discloses a dynamic balance adjusting structure of a marine low-vibration noise motor shaft system, which is characterized in that a balance disc is sleeved on the motor shaft system, and a check ring is arranged outside the balance disc and used for fixing the balance disc; the balance disc is a circular disc, mounting through holes which are used for mounting balance accessories are distributed on the balance disc along the circumference, and each mounting through hole is provided with a phase mark. Through add the balance disk on the motor shafting, the installation through-hole that sets up on the balance disk can add the balanced annex that is used for the counter weight, and the installation through-hole distributes along the circumference, and all is equipped with the phase place mark, measures the vibration phase place through the sensor, can conveniently guide the interpolation or the removal of balanced annex, finally realizes the purpose of compensation motor shafting rotation deviation.

Description

Marine low-vibration noise motor shaft system dynamic balance adjustment structure

Technical Field

The application relates to a dynamic balance adjusting structure of a marine low-vibration noise motor shaft system, which is applied to a marine high-reliability requirement, compact and low-vibration noise motor for adjusting the dynamic balance of the motor shaft system and belongs to the technical field of low-vibration noise design of motors and driving equipment thereof.

Background

With the development of ships and the requirement of concealment, the requirements of high reliability, compact structure, low vibration noise and the like are provided for the ship motor and the driving equipment thereof. The vibration noise of the low-vibration noise motor for the ship is 3% -8% higher than the actually measured vibration noise of the ship when the motor runs with load, and some vibration noises are even higher. The reason is that the on-site vibration noise affecting the motor and the driving equipment thereof is mainly shafting imbalance which is generated by comprehensive factors such as installation and assembly, load working medium, bearing, electromagnetic force generated by dynamic eccentricity of a rotor and the like, so that unbalance disturbance of the shafting is a main vibration noise excitation source of the motor and the driving equipment thereof. In order to solve the problem of vibration noise rise after field installation and operation, a simple, convenient, quick and effective adjusting structure is urgently needed, and a better adjusting effect can be achieved in limited time and space.

At present, the requirement on the dynamic balance of a shaft system is high in the design and manufacturing process of a marine low-vibration noise motor, the marine low-vibration noise motor is usually matched with a driving load such as a pump and an impeller of a fan to perform dynamic balance, the requirement on the balance precision is higher and higher, and the dynamic balance of the process is only limited to the dynamic balance of the shaft system on a balancing machine. In the operation process of an actual product, disturbance is generated by various factors such as electromagnetic force generated by machining, manufacturing, mounting and assembling, loading working media, bearings and dynamic eccentricity of a rotor, the stability and balance of a shaft system are influenced, even if the shaft system achieves high-precision balance during process dynamic balance, unbalance can still occur during actual mounting and working, vibration noise of the whole machine is increased, and abnormal heating or shaft system damage can be caused in serious cases. The existing online dynamic balance device mostly adopts a balance head or an electromagnet chuck to absorb steel balls and other modes to additionally install a balance regulator on a shaft system, has the defects of complex structure, large volume and low overall reliability, is difficult to realize field adjustment in special use occasions such as ships, and has the notice number CN206060487U of providing a dynamic balance ring and a dynamic balance regulating device, and the dynamic balance block moving along the circumference is adopted for regulation, but the regulation structure is complex and fine, has low reliability and cannot be applied to severe working conditions.

SUMMERY OF THE UTILITY MODEL

The technical problem that this application will be solved is that prior art dynamic balance can't satisfy the on-the-spot operation operating mode requirement of low vibration noise motor.

In order to solve the technical problems, the technical scheme of the application provides a dynamic balance adjusting structure of a marine low-vibration noise motor shaft system, which is characterized in that a balance disc is sleeved on the motor shaft system, and a check ring is arranged outside the balance disc and used for fixing the balance disc; the balance disc is a circular disc, mounting through holes for mounting balance accessories are circumferentially distributed on the balance disc, and each mounting through hole is provided with a phase mark. Through add the balance disk on the motor shafting, the installation through-hole that sets up on the balance disk can add the balanced annex that is used for the counter weight, and the installation through-hole distributes along the circumference, and all is equipped with the phase place mark, measures the vibration phase place through the sensor, can conveniently guide the interpolation or the removal of balanced annex, finally realizes the purpose of compensation motor shafting rotation deviation.

Preferably, the balancing accessory is a balancing block or a balancing column, and is attached into the mounting through hole to achieve the purpose of balancing weight.

Preferably, the middle part of the balance column is a column body, and two ends of the balance column are arranged in a hemispherical shape, so that the resistance of the balance disc during rotation can be effectively reduced.

Preferably, the mounting through holes are distributed at the same radius position from the center of the balance disc; or the distribution of the mounting through holes is two layers, the distance from the first layer to the center of the balance disc is d1, the distance from the second layer to the center of the balance disc is d2, d1 is less than d2 and less than 2 × d1, each mounting through hole has a corresponding phase and position, the attachment or detachment of balance accessories at different mounting through holes is guided and adjusted through the measurement and calculation of the vibration unbalance amount and the phase, the adjustment is continuous, and the purpose of reducing vibration noise is finally achieved.

The device has simple parts, compact structure and high safety, and when the device is used, only the sensors are required to be arranged on the installation site for data acquisition according to requirements, the data processor is used for carrying out feature extraction, unbalance amount and phase calculation, and the unbalance amount is adjusted through the balance disc, so that the effects of dynamic unbalance are reduced, and the final purpose of reducing vibration noise is realized; convenient operation, high reliability and obvious effect.

Drawings

Fig. 1 is a schematic structural view of dynamic balance adjustment provided in an embodiment, in which fig. 1-1 is a schematic structural view, and fig. 1-2 is a schematic structural view of a balance disc;

FIG. 2 is a schematic diagram of a dynamic balance adjustment process provided in the embodiment;

reference numerals: the device comprises a motor and a driving system shafting 1 thereof, a balance disc 2, a retainer ring 3, a protective cover 4, a phase mark 21 and a balance accessory 22.

Detailed Description

In order to make the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Examples

The embodiment provides a marine low vibration noise motor shafting dynamic balance adjustment structure, spare part is simple, easy dismounting and effect are obvious. After the product is delivered, the dynamic balance adjustment can be carried out on site after the product is used, so that the vibration noise caused by the dynamic unbalance of the whole machine is reduced, and the rotary motor and the rotary machine are generally suitable for ships and other rotary machines which require low vibration noise.

The dynamic balance adjusting structure of the marine low-vibration noise motor shaft system is shown in a figure 1-1, a balance disc 2 is sleeved on a motor and a driving system shaft system 1 of the motor and is coaxially installed with a rotating part at the tail end of the motor, a check ring 3 is arranged outside the balance disc 2 to fix the balance disc 2, and a protective cover 4 is arranged outside the whole structure to play a role in protection and facilitate the on-site detachment and adjustment of the balance disc 2; the structure of the balance disc 2 is shown in fig. 1-2, mounting through holes for mounting balance blocks or balance columns are distributed on the balance disc 2 along the circumference, each mounting through hole is provided with a phase mark 21, and the weight is increased or reduced by mounting or removing a balance accessory 22 in the mounting through holes so as to achieve the purpose of compensating dynamic balance; the balance accessory 22 can be a balance block or a balance column, the balance block or the balance column is a cylinder except the middle part, two ends of the balance block or the balance column are exposed at two sides of the balance disc, and two ends are arranged to be hemispherical in order to avoid causing too large resistance in the high-speed rotation process; in some possible implementations, the distribution positions of the mounting through holes are only arranged at the same radius position from the center of the balance disc 2, or the distribution of the mounting through holes is two layers, the first layer is at a distance d from the center of the balance disc 2₁The circle center of the second layer distance balance disc 2 is d₂，d₁<d₂<2*d₁。

In the process of operating the motor and the load thereof, disturbance is generated by various factors such as processing, manufacturing, mounting and assembling, load working medium, electromagnetic force generated by dynamic eccentricity of a bearing and a rotor and the like, so that the stability and balance of a shaft system are influenced. The dynamic balance adjustment structure provided by the application has the following adjustment process:

after the complete machine is assembled on site, the protective cover 4 can be opened, and the dynamic balance initial 0 phase is marked on the balance disc 2; arranging vibration sensors at selected points on the mounting flange, the bearing chamber and other positions of the whole machine, sampling vibration signals, carrying out filtering analysis and characteristic extraction on the signals on a processor, calculating the unbalance and the corresponding phase thereof, carrying out mounting adjustment on a balance block or a balance column on a balance disc, monitoring the vibration noise change after adjustment, and providing feedback for cycle adjustment; FIG. 2 is a schematic diagram of a dynamic balance adjustment process; the motor and the load working site thereof acquire vibration signals of a plurality of positions such as motor mounting feet, a mounting flange of a pump and the like, transmit the vibration signals to a processor, perform filtering to obtain effective data and perform feature extraction, calculate the size and the phase of unbalance according to an algorithm of the processor, and finally achieve the purpose of reducing vibration noise under the working condition of a product site by adjusting a balance disc according to a calculation result.

The adjusting process has obvious effect, directly reflects the adjusting result on the test of the vibration noise, can be adjusted for many times according to the actual situation to meet the requirement of reducing the vibration noise, and the structure after the balance adjustment can be always reserved.

It should be noted that, the vibration sensor is arranged on the site of the device to be adjusted to collect vibration signals, filtering processing is required to remove interference signals and effective data extraction is required, feature extraction and data analysis calculation are performed through data processor processing, the amount and phase of shafting unbalance are determined, and unbalance is adjusted on the balance disc according to the phase, and the amount removal balance is mainly used. The adjustment process can be carried out for several times until the vibration noise achieves a satisfactory effect; during adjustment, a weight removal or weight increase method can be adopted for balance adjustment, and a balance block or a balance column can be arranged on the balance disc according to requirements. The shape and the number of the balance blocks or the balance columns are designed by combining the comprehensive analysis of the flow field and the vibration noise, and the final design principle is to reduce the mechanical loss and the flow resistance caused by the balance blocks or the balance columns and minimize the disturbance of the turbulent noise generated by the balance blocks or the balance columns;

in addition, the initial design of the product combines the electromagnetic design and the medium characteristic of load driving, the integral residual unbalance of the equipment in the working process is calculated, and the size of the balance disc is designed according to the unbalance and the structural characteristic of the low-noise motor; before the product is assembled, the shaft system including the balance disc and the load impeller and other coaxial rotating parts are required to be subjected to strict process dynamic balance, and the balance precision needs to meet the design requirement.

Although the present invention has been described with reference to the above embodiments, it will be understood by those skilled in the art that the above embodiments are merely illustrative of the present invention, and that various changes and modifications may be made therein without departing from the utility model in its broader aspects and therefore, the present invention is not limited thereto, and changes and modifications may be made to the above embodiments without departing from the scope of the utility model as set forth in the appended claims.

The utility model has simple parts, compact structure, high reliability, is suitable for field operation and has obvious effect.

Claims

1. A dynamic balance adjusting structure of a marine low-vibration noise motor shaft system is characterized in that a balance disc is sleeved on the motor shaft system, and a check ring is arranged outside the balance disc and used for fixing the balance disc; the balance disc is a circular disc, mounting through holes for mounting balance accessories are circumferentially distributed on the balance disc, and each mounting through hole is provided with a phase mark.

2. The dynamic balance adjustment structure for the marine low vibration noise motor shaft system according to claim 1, wherein the balance attachment is a balance block or a balance column.

3. The dynamic balance adjusting structure of the marine low-vibration noise motor shaft system according to claim 2, wherein the middle part of the balance column is outside a cylinder body, and two ends of the balance column are hemispherical.

4. The dynamic balance adjustment structure of the marine low-vibration noise motor shaft system according to claim 1, wherein the distribution of the mounting through holes is arranged at the same radial position from the center of the balance disk.

5. The dynamic balance adjustment structure of marine low-vibration noise motor shafting according to claim 1, wherein said mounting through holes are distributed in two layers, the first layer is spaced from the center of the balance disk by a distance d₁The circle center of the second layer is d away from the balance disc₂，d₁<d₂<2*d₁。