wind power bearing Miniature Bearings Introduction

Refers to metric series miniature bearings, diameter less than 9mm; Inch Series, diameter less than 9.525mm in all kinds of bearings! The main materials are carbon steel, bearing steel, stainless steel, plastics, ceramics, etc., which can be done a minimum internal diameter of 0.6mm, general internal diameter of 1mm more.

2 Features

In the ultra-small aperture miniature bearings, agricultural bearings‍ deep groove ball bearing type miniature metric of 68 series, 69 series, 60 series, Inch R series of six kinds, on this basis, can be divided into steel dust band ZZ cover bearing series, with RS rubber seals series of miniature bearings, Teflon bearing seals series and with flange wall series and so on.

Three main purposes

Miniature Bearings for all types of industrial equipment in the field, small rotary motor high-speed low-noise, such as:

Office equipment, micro-motors, instrumentation, laser engraving, small clocks, soft drive, pressure rotor, dental drills, hard drive motors, stepper motors, VCR drum, toys, models, slewing bearing‍ computer cooling fan, cash registers, fax machines etc. related fields.

Miniature Bearing Failure

About 40% of the failures miniature ball bearings are contaminated by dust, dirt, debris and corrosion. Pollution is usually caused by improper use and poor use of the environment, it can also cause problems torque and noise. Miniature bearing failure by the environment and pollution generated can be prevented, but by simple visual observation can determine the cause of such failure. As long as the reasonable use and install, miniature bearings erosion is easy to avoid. Erosion is characterized in miniature bearing ring raceway indentations left by shock loads or incorrect installation produced. Erosion usually occurs when the load exceeds the material yield limit. If not properly installed so Other bearing‍ that the load across a miniature bearing ring will produce erosion. Also miniature bearing ring indentation on noise, vibration, and additional torque.

wheel bearing Wheel bearing (hub bearing)

Wheel bearing (hub bearing) primary role is to load and for the rotation of the hub to provide accurate guidance, both axial load and radial load, is a very important component. wind power bearing‍ Traditional automotive wheel bearing is composed of two tapered roller bearings or ball bearing combination, bearing installation, oiled, sealed and adjust the clearance is carried out in the car on the production line. This structure makes it difficult in a car assembly plant, high cost, poor reliability, and maintenance car maintenance, but also the need for bearing cleaning, oiling and adjustment. Developed on the basis of the hub bearing unit is the standard angular contact ball bearings and tapered roller bearings on, it will be two sets of bearings as a whole, with good assembly performance can be omitted clearance adjustment, light weight, Full complement cylindrical roller bearings‍ compact structure, load capacity large, sealed bearings can advance into the grease, hub seals and maintenance advantages omitted from the outside wheel, has been widely used in cars, and in the truck also has a tendency to gradually expand the application.

LYHY deck crane bearing Dual topper derrick boom means and Hebert

Improved boom device was later arise. Dual topper derrick boom device is operated by a single lever improvements made, the device only cargo runners and about two separate topper. Crane boom by a winch and two topping winch to manipulate, easy to operate, high working efficiency. Hebert derrick Triple row roller slewing bearing‍ boom device by double-lever operation improvements made​​, the device has a cargo winches, extremely heavy winch cable and lanyard. With the winch boom may soon put in any position. While also pointing put cargo lifting and fall within the working radius of the boom to improve handling efficiency. This is an important step towards fully automated cargo handling forward.

Deck crane

Set machinery in the ship deck crane bearing‍. This compact crane structure, the ship has more deck area available, less impact on the bridge upstairs sight. Deck cranes easy operation, high working efficiency, and flexibility, before the job is no tedious preparatory work widely.

Deck cranes bearing ‍commonly used fixed rotating cranes, mobile cranes and gantry cranes rotation. Transmission power transmission and electricity - two hydraulic Thin section bearings‍ drive.

Fixed rotating crane

This crane most widely used, can be used alone or in pairs in the starboard job. Weight is generally 3 to 5 tons. In the multi-purpose boat, requires a single crane can lift a 20 ft container, twin-lift can lift 40 feet container (30 tons), its starting weight of up to 25 to 30 tons.‍

LYHY deck crane bearing Crossed roller bearing assembly points and quality measures

Thin-walled cross roller bearings according to its structure, the assembly stage needs to grasp the bearing clearance control, rotary accuracy and stability of 3 points, cross roller bearings belong to special bearings with high precision, is mainly used in CNC machine, robot arm, as well as medical and Full complement cylindrical roller bearing‍ military equipment, which are double row roller in a 45 degree tilt angle roll cross distribution channel, can maintain high rigidity on the roller and raceway contact line, but also because of a 45 degree tilt angle raceway can be uniformly load of axial and radial bearing, perfect overturning or torsional moment; in addition, cross roller bearings with negative clearance design and pre tight, can high rigidity bearing guarantee (compared with traditional models, rigid increase 3~4 times) and high precision, cross roller bearings precision Luoyang Boying bearing is in P5 above, basic accuracy of P4, P2, belongs to high precision bearing:

1 crossed roller bearing clearance control bearing slewing bearing‍ production processes in the two process to ensure the bearing clearance, a bearing end grinding, roller bearing sleeve so need beforehand medium size of test equipment, test equipment with rotary bearing is smooth, the negative clearance has a slight pressing feeling, can ensure the roller and the raceway with clearance at around 0.01mm, preparing for the next assembly; second procedures for fitting test equipment, the bearing does not install the isolation block or holder of test equipment, there are 5 groups of roller for choice, according to the assembly member feel and a dial indicator measuring judgment clearance is required, if don't be by replacing the roller and raceway grinding to finish the match, this method can also be used in the production of the turntable bearing YRT, is commonly used in bearing production method, just cross roller bearings are precision bearing, clearance requires precise control;

2 rotary accuracy and stability control; through production practice experience for many years we know, rotary precision cross roller bearings and YRT turntable bearing mainly, and the single direction thrust ball bearing‍ raceway quality and deformation, therefore, all bearing before shipment is half finished product assembly, prevent long after placing deformation, and thin-walled cross roller bearings in the grinding time by tempering 2 times treatment, ensure the material stress release caused by deformation of the risk to a minimum; the actual assembly of a rotary impeded, the bearing cleaning, check whether there is damage raceway, then the accuracy of roundness and flatness.

Measuring, Cengcengbaguan to ensure the bearing quality.‍

wind power bearing bearing temperature

The bearing temperature are the main reason:

The first: whether the lubricating oil quality deterioration? If the viscosity of lubricating oil can also result in INA bearing temperature Slewing drives‍ rise

Second: bearing assembly if too tight, the gap will lead to inadequate flange bearing temperature rise;

Third: bearing assembly too tight will result in bearing temperature rise;

Fourth: Race rotation on the shaft or shell will result in bearing temperature rise;

Fifth: the bearing load is too large will result in bearing temperature rise;

Sixth: if the bearing cage or a rolling Double Row Ball Slewing Bearing‍ body broken words, will result in bearing temperature rise.

wheel bearing Classification, bearing

Basics - bearing classification / composed / selection / installation

Sliding bearing: contact (numerous points of contact); suitable for very high speed, very low (load); shaft is suspended, Double Row Ball Slewing Bearing‍ the oil is very important.

Rolling bearings: ball bearing: point contact: light load speed;

Classification, bearing

Sliding bearing: contact (numerous points of contact); suitable for very high speed, very low (load); shaft is suspended, the oil is very important.

Rolling bearings: ball bearing: point contact: light load speed;

Roller bearings: linear contact: heavy-duty high-speed;

Two, bearing

The outer ring, inner ring, Full complement cylindrical roller bearings‍ rolling body cage,: bearing retainer

Cage effect:

1, to prevent direct contact between the rolling body to reduce friction and heat generation;

2, the rolling body guide;

3, to provide lubrication space;

In 4, install or Uninstall can avoid a rolling body powder.‍

deck crane bearing Cage effect

the role of deck crane bearing

1, to support the shaft and parts on the shaft, to keep the rotating precision of shaft;

2, to reduce friction during rotation and wear;

Four, slim ball bearing‍ bearing selection principle

1, ball bearings than the limit speed of roller bearing high, priority should be given to the selection of ball bearing;

2, at high speed to the selection of bearing, ultra light, super light and light series (inner diameter and outer diameter, the smaller, the rolling body is light and small, centrifugal inertial force is small);

3, cage materials has a great influence on bearing speed, solid cage than stamping cage to allow higher speed;

The speed limit is 4, thrust bearing is very low, when working at high speed, if the axial load is not very big, can use the angular contact ball bearings to Taper roller bearings‍ bear pure axial force;

5, if the speed exceeds the bearing sample, can be used to improve the tolerance level, increasing the clearance, the circulating cooling method.

deck crane.‍

‍

wind power bearing angular contact bearings

At the same time bear radial load and axial load case, supporting often use mounting angular contact bearings and tapered roller bearings are. Angular contact bearings installed in pairs arranged in one of three ways. Two bearing outer ring width end Full complement cylindrical roller bearings‍ relative installation called back-to-back mounting method. The two support force on bearing span beyond. This arrangement for supporting span large, good steel shaft cantilever, axial thermal elongation, the outer ring is disengaged from the inner trend, so the shaft without jamming, so widely used. But if the pre installed in the shaft when heated, pre tension will be reduced. Two bearing outer ring narrow end relative installation called face to face mounting. The force point two support falls on the supporting span. This arrangement has the advantages of simple structure, installation, debugging convenient and therefore are more widely used, mainly for short axis and the temperature rise is not high, but it should be noted that we must have a spare clearance. The axial clearance also shoulds not be too big, will reduce the running accuracy of the shaft. When slewing rings‍ the axial load is larger, the need for multiple bearings and bearing, the bearing outer ring width is often used, narrow face relative installation series. Effect of the bearing force are located on the same side of the bearing are arranged in the same direction is also called series. The arrangement of this to the attention of the structure and manufacture to ensure each bearing can be as much as possible uniform load.

The machine is in operation, the general spindle or drive shaft temperature higher than the adjacent parts of the temperature, so the shaft will heat up elongation. In order to keep the shaft to rotate flexibly, in supporting structure design, while meeting the axial positioning accuracy requirements, but also consider the axial heat free expansion requirements. Axial positioning and axial expansion way is the corresponding.

Adjustment of the bearing clearance is to control the running accuracy of the shaft. The axial position adjusting shaft is in order to meet the specific requirements of linear motion bearings‍ some of the gear transmission. For example: in the worm, worm axis must fall in the middle plane worm gear to ensure the correct engagement, so the worm shaft can adjust its position in the axial direction. The bevel gear drive, pitch cone cone vertex two bevel gear must coincide, which required two bevel gear shaft can be axially adjusted.

wheel bearing Bearing selection issues to consider

In the choice of the general bearing support to those problems? You can try the following four steps to consider:

How to define the axis position, Angular contact ball bearings‍ including radial and axial position is the first thing to consider. General axis adopts double support structure, the radial position of the shaft joint is defined by the two support, centripetal or angular contact bearing supports radial location of each Ying Youqi effect. Axial displacement axial displacement axial position may be composed of two supporting the limit in one direction can be limited in two directions by a bearing, in general, taper roller bearing‍ the axial positioning in different ways can get different running accuracy. Therefore, the design of supporting structure should be based on the axis of the operation accuracy and working conditions, practical scheme of axial positioning.

deck crane bearing Axial bearing

Ring chain electric hoist dustproof and waterproof

Electric chain hoist is also called electric chain hoist, hoist is one of the indispensable tool of crane.

Electric hoist axial bearing‍ chain types are: imported electric chain hoist, super low electric chain hoist, chain electric hoist lifting weight is 0.5t~10t. Electric chain hoist chain is equipped with a chain, the chain electric hoist looks neat appearance, anti rust oil is also equipped with a belt, so as not to use electric chain hoist chain in the chain bag, to prevent Liner Motion Bearings‍ rusting of the chain. To extend the service life of the electric hoist.

Ring chain electric hoist is firm and durable, waterproof and dustproof performance is good, the compact forming a small aluminum. But electric chain hoist equipment in order to ensure the safety and own the development of the friction clutch and the upper and lower limit switches, the use of simple and convenient. Electric hoist is also provided with a leakage protection devices and overload protection device, if the maximum gravity is lifting more than electric hoist can bear, electric hoist will automatically worm gear speed reducer‍ cut off power, to avoid the accident which occurs due to overload, not causing harm to use.

wind power bearing bearing noise caused

Use of the bearing noise caused by improper solutions

1, the bearing dust

To solve the dust agricultural bearings‍ caused by noise method bearing: cleaning method can improve the bearing, wind power bearing, shaft in the device, hole as well as the matching parts all stern Qing Shen clean; two Su light slip foreign agent within three to improve the bearing; seal; four avoid the use of information is not pure or embedded foreign body plastic stick frame.

2, bearing a scar.

To solve the scar caused by the noise of the method of bearing: a device not knocking bearing, the bearing and shaft assembly after Crossed Roller Slewing Bearing‍ loading to avoid bearing installed cable bearing seat; avoided shock vibration bearing corrosion and transport two inventory; three using the high viscosity of grease.

3, in case of improper bearing lubricant

To solve the lubricant due to improper noise method: improper bearing lubricant can be divided into three classes: the wrong lubricant; two lubricant lack; three Thin section bearings‍ lubricant aging induration. To choose the appropriate lubricant, lubricant according to the lubrication to add, to regularly replace the lubricant.

wheel bearing maintenance of bearings

Bearing raceway acoustic raceway and its control method is when the operation, the rolling element rolling and making a slippery deck crane bearing‍ continuous sound in the raceway surface, is a basic sound unique all bearings are the. Bearings generally sound is rolling road sound with other sounds. The bearing seat more rigid, roller acoustic sound pressure level is low. Such as the radial clearance is too small, raceway acoustic sound pressure level and frequency with reduced radial clearance and increased dramatically.

Bearing fatigue failure is a failure surface form, mainly for fatigue crack initiation, propagation and fracture process, long-term effects under the alternating load failures arising under the metal.

1 reasons: low single direction thrust ball bearing‍ method, whole camshaft bearing accuracy: the provisions bearing accuracy class.

2, reason: the shaft bending or holes are not concentric method: repair of spindle box

3, reason: the belt too tight: adjust the belt tightness appropriate.

4, reason: poor lubrication method: select the stipulated lubricating material and appropriate cleaning.

5 reasons: low quality, assembly method: improve the assembly quality.

6, reason: shell run method bearing: the replacement of bearings and related components and wear

7, the axial force is too large: cleaning, adjusting seal clearance requirements between 0.2 ~ 0.3mm, correct the impeller balance hole diameter and check static balance value

Method 8: replacement of bearings, Slewing drives‍ bearing damage.

Control of raceway acoustic methods are: the selection of bearing low noise bearings which waviness small, carefully select the use conditions. Rolling road sound often affects the entire mechanical noise, reduce the raceway can reduce the noise of the whole machine.‍

deck crane bearing Bearing ferrule to production?

1, forging: forging process if the overburnt, overheating, split carbide network will reduce the toughness and strength of ring. So we must strictly control the processing temperature, cyclic heating and cooling after forging conditions (such as spray cooling), Triple row roller slewing bearing‍ especially the larger varieties of ring forging, the temperature over 700 ℃, shall not be piled up display.

2, the heat treatment of heat treatment equipment: close monitoring is an important work in the workshop.

The reliability of monitoring equipment. Must close monitoring of the instrument, thermocouple, temperature control equipment to Taper roller bearings‍ ensure that important, accurate and reliable measurement data error; to exceed the standard must be promptly replaced, is strictly prohibited to stop the operation.

3, monitoring of grinding process. The finished deck crane‍ bearing ring does not allow to have the existence of grinding burn and grinding cracks, especially with the surface modification of the inner taper no burns. The ferrule if pickling full inspection should be carried out after burn, out products, severe burns can not repair or rework unqualified should be scrapped, does not allow the grinding burn the ferrule into the assembly process.

4, identity management, to the ferrule grinding marine crane bearing‍ steel warehousing, the process must be in strict management, strict distinction between GCR15 and GCR15SIMN two different materials and products.

deck crane bearing Bearing ferrule to production?

1, forging: forging process if the overburnt, overheating, split carbide network will reduce the toughness and strength of ring. So we must strictly control the processing temperature, cyclic heating and cooling after forging conditions (such as spray cooling), Triple row roller slewing bearing‍ especially the larger varieties of ring forging, the temperature over 700 ℃, shall not be piled up display.

2, the heat treatment of heat treatment equipment: close monitoring is an important work in the workshop.

The reliability of monitoring equipment. Must close monitoring of the instrument, thermocouple, temperature control equipment to Taper roller bearings‍ ensure that important, accurate and reliable measurement data error; to exceed the standard must be promptly replaced, is strictly prohibited to stop the operation.

3, monitoring of grinding process. The finished deck crane‍ bearing ring does not allow to have the existence of grinding burn and grinding cracks, especially with the surface modification of the inner taper no burns. The ferrule if pickling full inspection should be carried out after burn, out products, severe burns can not repair or rework unqualified should be scrapped, does not allow the grinding burn the ferrule into the assembly process.

4, identity management, to the ferrule grinding marine crane bearing‍ steel warehousing, the process must be in strict management, strict distinction between GCR15 and GCR15SIMN two different materials and products.