¿Qué es un disco giratorio? Clasificación y aplicación de la unidad de giro.

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El reductor giratorio es un reductor giratorio con una fuente de alimentación de impulsión integrada. El rodamiento giratorio se utiliza como parte principal de la transmisión y como accesorio del mecanismo. Su esencia es un motor de imán permanente con un gran par. Este producto también se llama reductor rotatorio. Drive, en comparación con los productos rotativos tradicionales, tiene una instalación simple, fácil mantenimiento y ahorra espacio de instalación en mayor medida. Se utiliza principalmente en camiones con vigas, vehículos de trabajo aéreo, robots industriales, generación de energía fotovoltaica, generación de energía eólica y garras de maquinaria de construcción. Herramientas y otros campos.

¿Qué es la unidad de giro?

Unidad de giro

1. Definición de unidad de giro

The slewing drive device is also called a slewing reducer, a gear reducer, a turntable reducer, a slewing mechanism, and a slewing drive pair. They are all types of reducers that use slewing bearings as the main support, and the auxiliary drive source uses gears or worms as the driving parts, so as to realize the deceleration and full-circle slewing functions. The composition of the slewing drive mainly includes gears (or worms), slewing bearings, motors, housings, and bases. Slewing drive can be basically divided into single worm drive slewing drive, double worm drive slewing drive and special type of slewing drive.

2. Classification of slewing drives

Impulsión del engranaje recto

(1) Classification according to transmission form

According to the variable transmission form of slewing drive, it can be divided into gear slewing drive and worm gear slewing drive, inheriting the characteristics of gear drive and worm gearing. These two slewing drives can be adapted to medium-high and low-speed applications respectively. In terms of carrying capacity, the performance of the worm gear type is better than that of the tooth type, and when the envelope worm transmission is adopted, its carrying capacity, anti-deformation ability and transmission rigidity are further improved, but the worm gear type rotary drive is more efficient in terms of efficiency. Inferior to the gear type slewing drive, the gear type slewing drive is divided into a straight tooth type slewing drive, a helical tooth type slewing drive, and a volute type slewing drive.

(2) Classification according to the openness of slewing drive

According to the openness of the slewing drive transmission mechanism, the slewing drive can be divided into open and closed. Generally, the open structure is mostly used in applications where the environment is too harsh and the maintenance and maintenance cycle is short. The open structure is more convenient for parts. The inspection, maintenance and maintenance of the product are also more convenient for replacement. However, the closed structure can provide a longer maintenance life cycle in occasions where the environmental conditions have not changed much and the environmental pollution level is below the medium level.

① Accionamiento de giro helicoidal (rectificado) de precisión de holgura negativa y alta precisión de doble engranaje personalizado, para lograr un juego cero para los clientes.

(3) Classification according to driving power

According to the structure operation type of the slewing drive, it can be divided into light slewing drive, medium slewing drive and heavy slewing drive. According to the slewing drive’s power, size, dead weight, and application in different fields and machines to achieve its own functions, the light-duty slewing drive is light in weight, and its load and deceleration capabilities are suitable for high-speed (≥10rpm), vibration, impact loads, etc. Working conditions: The medium-sized rotary drive is suitable for high-speed (≥10rpm), vibration, impact load and other working conditions, and the heavy-duty rotary drive is suitable for high-speed (≤3rpm), heavy-duty, and intermittent working conditions.

(4) Classification according to the drive composition structure

Según la composición del dispositivo de accionamiento, se divide en accionamiento vertical y accionamiento de giro horizontal. La transmisión de giro vertical significa que el motor de tracción y la rueda motriz son verticales, y el motor de tracción está en posición vertical sobre la rueda motriz. Tiene las ventajas de un radio de giro pequeño, un alto nivel de protección, un mantenimiento conveniente, etc., pero un alto costo de fabricación; accionamiento horizontal significa que el motor de tracción y la rueda de desplazamiento son paralelos, y el motor de tracción es principalmente coaxial con la rueda de desplazamiento y es horizontal. Tiene las ventajas de estructura compacta, simplicidad y baja altura de instalación.

¿Cuál es el módulo de engranaje de anillo de giro?

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El cojinete de giro es una de las partes importantes de muchas máquinas y equipos modernos. Se llama «junta de máquina». Mucha gente está familiarizada con varios parámetros del rodamiento giratorio, incluido el juego, el diámetro interior y exterior, el coeficiente de fricción, etc. Muchos amigos no conocen el módulo del engranaje de apoyo. El personal técnico de Longda Bearing, un fabricante de rodamientos giratorios, nos brindará una introducción detallada a este problema.

1. ¿Cuál es el módulo de la corona de giro?

La longitud del arco (engranaje) / línea recta (cremallera) ocupada por un solo diente de engranaje en el círculo de indexación (engranaje) / línea (cremallera), su longitud es π * mym es el módulo.

What does the module of the slewing ring represent: The module of the slewing ring represents the product of the tooth pitch and the number of teeth of the slewing ring gear, which is the circumference of the index circle. The gear modulus of the slewing ring determines the size of the tooth. The gear modulus is a basic parameter for the calculation of the gear size. The symbol is «m». Gear cutters can be standardized, so that the standard modulus of gears can be standardized for mass production. Facilitate the replacement of later accessories. In the same way, «modulus» refers to the ratio of the pitch t between the tooth profiles of two adjacent gear teeth on the same side and the circumference ratio π (m=t/π), in millimeters.

If the number of teeth of the slewing ring gear is constant, the larger the gear modulus, the larger the radial dimension of the gear. The teeth of a gear with a large modulus are thick, and for two gears with the same number of teeth, the outer circle of the gear with a large modulus is larger. Therefore, the modulus of the gear in a watch is very small, and the modulus of the flywheel and transmission gear on the mechanical punching machine is large. The modulus of the two meshing gears must be the same. Modulus is the basic parameter of gear design, and it is used in many calculations of gear design.

Cojinetes giratorios

2. Reasonable selection of gear module

When designing a gear, one of the important parameters is this modulus. The gnawing of the gear will produce gnawing pulsation. The main reason is that it has a great relationship with the elastic deformation of the gear teeth. It is a basic part of the gear design. Parameter-gear modulus, if it is a relatively large modulus (that is, a gear with a relatively large size), it will also have a relatively large load-bearing capacity. The modulus parameter is inversely proportional to the degree of bending of the gear teeth. The increase of the modulus means that the rigidity of the gear teeth is improved, so that the elastic deformation of the gear teeth will not be great when the gnawing transmission is carried out, which greatly reduces the impact force formed by the gear teeth, thereby achieving The purpose is always greatly reduced. Therefore, from this point of view, the modulus should be increased appropriately, but the error generated when machining gears is also related to the modulus. If the modulus is increased, the tooth profile and pitch will also be increased. At this time, the error of gnawing noise will also increase accordingly, so the choice of modulus should be determined according to the specific situation.

Cojinetes giratorios

In the case of keeping the modulus unchanged, the diameter of the gear is proportional to the number of teeth, so the change of the number of teeth will also change the bending amount and elastic rigidity of the gear teeth: the strength of the noise generated by the sound source is not only related to the energy of the vibration source It is related to the size of the radiation area. If the radiation area is increased, the radiation power will also increase. Increasing the gear diameter will increase the noise radiation area, which will greatly affect the gear. Effective control of noise.

Por lo tanto, en el diseño relevante, dentro del rango permisible de asegurar la resistencia del engranaje, el número de dientes pequeños y el módulo pequeño deben usarse tanto como sea posible, y la selección razonable de materiales y métodos de tratamiento térmico pueden combinarse promover el aumento de la fuerza de los dientes del engranaje, reduciendo así el diámetro de los dientes del engranaje. Entonces, se logra el propósito de reducir el ruido del engranaje.

¿Cuál es el proceso de fabricación de engranajes de los cojinetes de giro?

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El procesamiento de engranajes es un proceso que requiere mucho tiempo en la producción de cojinetes giratorios y también es uno de los principales factores que han restringido la eficiencia de producción de los cojinetes giratorios. Con base en los datos de mecanizado reales, la aplicación de los procesos de fresado y tallado en el procesamiento de los dientes de los rodamientos de la plataforma giratoria se compara a partir de los aspectos de eficiencia y costo, lo que proporciona una base para la selección razonable de tecnología y equipo de procesamiento de dientes de los rodamientos de la plataforma giratoria. Hoy, el editor vendrá a hablar con usted sobre el proceso de fabricación de dientes de los rodamientos giratorios.

1. Selección de material del cojinete de giro en blanco

Generally, 50Mn is used for the slewing bearing ring. After surface quenching, the raceway hardness is HRC55-62. However, sometimes 42CrMo is selected to meet the needs of the host for special applications, which has a higher hardness. LDB’s selection of blank suppliers has undergone strict screening and strictly follows the traceability procedure. For each blank, from receipt to finished product, it can trace the source of the blank according to its serial number, quality inspection and other whole-process data.

Cojinetes giratorios

2. The technology of making gears from slewing bearings

1. The equipment used in the gear processing department still uses a large number of ordinary gear hobbing machines and gear shaping machines. Although it is convenient to adjust and maintain, the production efficiency is low. If a large capacity is completed, multiple machines are required to produce at the same time. In order to solve the problem of low processing efficiency, while increasing the number of gear hobbing machines and gear shapers, high-speed gear milling machines are used, which has high processing efficiency and good surface finish quality.

2. Some slewing bearings used under severe conditions require surface quenching treatment, such as excavators, pile drivers, wood grabs, graders and other operating conditions, which have relatively large impact loads and require quenching treatment on the tooth surface. The hardness after quenching of several sizes is between 45-60HRC. For common working conditions such as cranes and tower cranes, the tooth surface does not need to be heat treated.

3. With the rapid development of Industry 4.0, slewing bearings are more and more widely used in the automation industry. In this application field, the accuracy requirements for the teeth are relatively high, and the low requirements are also 8 levels of accuracy. In response to the rapid changes in the market, during the construction of the new plant, higher accuracy requirements are required for the equipment to meet the market demand.

4. After the tooth-making process is completed, there are follow-up processes such as fine turning, plane, drilling, track grinding, and assembly, and the slewing bearing can be shipped out of the factory.

3. Introduction to the failure analysis of the slewing bearing gear

1. Improper adjustment of the backlash of the large and small gears during installation, which did not meet the requirements, resulting in poor meshing of the two gears during operation, resulting in broken teeth. The backlash should be adjusted strictly as required.

2. Failure to adjust the meshing gap with the pinion at the maximum position of the gear jump as required, causing the pinion to jam when meshing with the maximum gear jump position during operation, causing tooth breakage. The meshing adjustment should be carried out at the position painted with green paint and the pinion gear should be adjusted according to the requirements for trial operation.

3. Los ejes de los engranajes grandes y pequeños no son paralelos, y los engranajes grandes y pequeños engranan mal después de la instalación, lo que provoca la rotura de los dientes. Debe asegurarse que los ejes de los dos engranajes sean paralelos.

4. Los pernos de montaje no están bien apretados y los engranajes de las mallas grandes y pequeñas no están bien engranados, lo que provoca la rotura de los engranajes. Los pernos deben apretarse según sea necesario.

Revisión y actualización del sitio web

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Felicitaciones a Luoyang Longda Bearing Co., Ltd.

Actualización y revisión del sitio web

El sitio web se revisó y actualizó con éxito el 18 de junio de 2021 ¡LDB espera su consulta!