In the process of chestnut planting, there are about 30 species of common and heavier pests and diseases of chestnut. The main chestnut pests are: chestnut bee, pruning elephant, chestnut elephant, chestnut scorpion, star snail, mulberry , peach aphid, chafer, chestnut caterpillar, etc., the occurrence of these pests and diseases not only affect the growth of chestnut, but also restrict the increase in chestnut yield and quality. From the perspective of sustainable development of chestnut planting industry, chestnut pest control should try to achieve drug control and harm control. The application of frequency-vibration insecticidal lamp in the prevention and control of chestnut pests and diseases provides a strong support for the development of green pests and diseases in the chestnut industrial park, and promotes the healthy and rapid development of the industry.
In modern agricultural production, agricultural products such as chestnuts are advocating green environmental protection, while traditional pesticide insecticide methods are contrary to it. In this context, how can we reduce the use rate and frequency of pesticides while ensuring the safety of chestnut planting? That is to replace it with a more environmentally friendly and effective insecticide method. The frequency-vibration insecticidal lamp is a kind of physical insecticidal device, which will automatically attract insects and insects. In the process of work, it consumes environmentally-friendly electric energy, and does not produce harmful substances that affect the quality and safety of agricultural products and the ecological environment. Frequency-vibration insecticidal lamps are used to replace pesticides and kill insects, which is safer and more effective, and matches the demand for prevention and control of green pests and diseases in modern chestnut gardens.
At present, all localities are vigorously developing advantageous and characteristic agriculture, and chestnut planting is an important industry for local people to increase production and income in many areas. Therefore, in order to ensure the rapid and healthy development of the industry, plant protection work must also be put in place. In the process of vigorously promoting green plant protection, the frequency-vibration insecticidal lamp is an important main force, playing an important role in the process of reducing the drug and controlling the orchard, tea garden and Daejeon, so through the frequency-vibration insecticidal lamp In the application of chestnut pest control, the development of chestnut industry will be more secure, and it will make great strides toward high quality and high yield, increasing production and quality.
Compared to other rolling-element bearings, Slewing Bearings are thin in section and are often made in diameters of a metre or more; the slewing bearings on the Falkirk Wheel are 4 metres diameter and fit over a 3.5 metre axle. Slewing bearings resemble oversize aircraft control surface bearings.
A slewing bearing or slewing ring is a rotational Rolling-Element Bearing or plain bearing that typically supports a heavy but slow-turning or slow-oscillating load, often a horizontal platform such as a conventional crane, a swing yarder, or the wind-facing platform of a horizontal-axis windmill.
Slewing bearings often use two rows of rolling elements. They often use three race elements, such as an inner ring and two outer ring "halves" that clamp together axially.
Slewing bearings are often made with gear teeth integral with the inner or outer race, used to drive the platform relative to the base.
As for other bearings that reciprocate, rather than rotating continuously, lubrication can be difficult. The oil wedge built up in a continuously rotating bearing is disrupted by the stop start motion of slewing. Instead, a hydrostatic bearing with pumped oil flow may be used.
Slewing Bearings
Slewing Bearings,Slewing Ring Bearing,Single-Row Ball Slewing Bearing,High Precision Slewing Bearings
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