Slewing ring

Slewing ring wide range of applications, mainly used for lifting machinery (truck cranes, offshore crane bearing, etc.), construction machinery (excavators, loaders, etc.), transport machinery, materials processing machinery, metallurgical machinery, food processing machinery, and military equipment (tanks, anti-aircraft artillery, radar, rocket launchers, etc.), medical equipment, scientific equipment. Slewing bearings and plain bearings, like all the rolling elements and rolling ring with raceways. However, it is compared with the ordinary rolling bearing, there are many differences, and they are the following:
1. slewing ring size is large, its diameter is typically 0.4 to 10 meters, some as high as 40 meters.
2. slewing bearings are generally required to bear the load of several aspects, not only to withstand axial and radial load, but also bear a large tipping torque. Therefore, often acts as a rotary bearing sets ordinary rolling bearings.
3. slewing ring operating speed is very low, usually in the 10 r / min or less. Moreover, in most cases, slewing ring without continuous rotation, but only within a certain angle and from the rotation, the equivalent of the so-called "swing bearing."
4. In the manufacturing process, materials and heat treatment, etc., slewing ring and rolling bearings are very different.
5. Generally, the sealing device with slewing ring on the ring gear rotational drive and dust with.
6. slewing ring size is large, so unlike ordinary bearing sleeve and mandrel mounted on the bearing housing, instead of using screws to fasten the upper and lower bearings.

Wind Bearing industry opportunities and risks

At present, China's wind power bearing industry has "five male guru" of the situation, the state focused on nurturing wind power with independent intellectual property rights of the manufacturer, will give subsidies to support related equipment manufacturing, research and development centers, so we Luoyang Huayang company also added wind power bearing production. However, there is general wind bearing device compatibility is not enough, versatility is not strong, except for the wind turbine support, but more limited range of applications, wind power bearing gear and worm gear reducers processing equipment can only not in port machinery, large-scale medical equipment, construction machinery, such as number use the number of mechanical products, uses a single risk exists.

Deck crane slew bearing rocking tests

A number of incidents have occurred recently involving failure of the slew bearings of ships’cargo deck cranes, resulting in crane losses and serious injury to personnel. These failures have been caused by undetected excessive wear in the slew bearings.Rocking tests deck crane bearing manufacturers generally recommend that ‘rocking tests’ are carried out every six months in accordance with their instructions, and that the results are recorded and monitored in order to ensure the wear tolerances remain within the limits permitted by the designers.Cranes which are particularly at risk are those with single ball race slew bearings. Cranes fitted with this type of slew bearing must have rocking tests carried out, in accordance with manufacturer’s instructions, to determine that the amount of wear in the bearing races is within permitted limits.

Super Precision Bearings & high precision bearings

Machine tools and other precision applications bearings need to have excellent performance. It includes an extensive speed capacity to maintain a high rotational accuracy, high system rigidity, low heat generation, low noise, low vibration, and so on. Rolling general industrial applications can only meet part of the requirements. Therefore, our company to create a full range of high precision bearings. Super precision bearings can help further optimize performance parameters of their equipment and applications OEMs and end customers. And depending on the bearing series and applications, with the advantage different, but always include high speed and carrying capacity, bearing a long service life, maintenance intervals long time, low energy consumption.
Typical applications include super precision bearings:
1.Metal cutting and woodworking machinery Spindle
2.Other mechanical spindles (such as dynamic balancing machine)
3.High speed rolling bearing machine
4.Printing Equipment
5.Precision Ball
6.Machining Center
7.High speed turbocharger
8.Vacuum pump
9.Racing
10.Ship anti-rolling gyro system
11.Mechanical Components Semiconductor Industry

The relative movement between the shaft and the bearing sliding bearings

The relative movement between the shaft and the bearing sliding bearings, linear plain bearings called. Bearing basic structure is divided into the bush and the journal. Rolling bearing on the most essential difference and that a point contact, one face Contacts, will have advantages and disadvantages in nature. Plain bearings can be used lubricating oil, grease, water, lubrication, etc..
Compared with the rolling bearings, sliding bearings advantages: 1, high carrying capacity; large contact area causes; 2, simple structure, easy manufacturing, processing, demolition; 3, good impact resistance and good vibration performance, smooth operation, high rotational accuracy. Disadvantages: 1, the maintenance complex, demanding lubrication conditions; 2 boundary lubricated bearings, friction and wear bigger. (This is also the disadvantage of a large contact area)

Compared with plain bearings, roller bearings.

Compared with plain bearings, roller bearings.What is the difference between the two? It is what strengths and weaknesses?Bearing in accordance with the different nature of friction was divided into Rolling and plain bearings, it is apparent definitely better than plain bearings Rolling friction is small, start fast, high efficiency, which is the advantage of rolling bearings. Compared with plain bearings,Rolling radial dimension is large, poor damping capacity, high speed, low life, the sound is large, which is its shortcoming. The rolling elements are not limited to the shape of the ball, as well as cylindrical roller, tapered roller, shares of the roller, and needle. According to different rolling elements, bearing into ball bearings and roller bearings. In other conditions, flexible operation roller bearings for high speed, but relatively low carrying capacity; roller bearings running better than ball bearings and flexible, but high load carrying capacity, strong impact.

Cranes bearing and marine gram make hanging bearing and other more technical features

4 m harbor cranes usually use internal or external gear teeth diameter three row roller slewing bearing to withstand high overturning moment. All kinds of cranes bearing, bucket wheel bearing, marine cranes and crane bearing usher bearing repair peak, the failure rate frequently, in order to save costs and improve the utilization of the bearing, slewing bearing repair, repair of wheel bearings business growing. About deck crane bearing appears sound, sometimes accompanied by vibrations, which may be for the following reasons:
1. Bearing heavy loss, fragmentation caused by the ball portion;
2. Ball isolation block (nylon or metal material) crushed, causing blockage;
3. bearing channel layer fatigue hardness loss, pitting, pits, pitting, bearing operation is not flexible;
4. bearing long-term stress and deformation, ovality tolerance
5. seal failure, bearing lubrication channel not long, into the channel of debris blockage.