New technology development of high-reliability self aligning roller bearing

(New technology development of high-reliability self aligning roller bearing)

New
technology development of high-reliability self aligning roller bearing

The
new technology of machine tool spindle self aligning roller bearing developed
by Japan Seiko (hereinafter referred to as NSK) can reduce the workload during
assembly and running-in operation, and improve the operating reliability of the
spindle. The technology will be exhibited at the "CIMT 2021 17th China
International Machine Tool Show" in Beijing on April 12, 2021. Based on
market feedback, we will strive to achieve mass production as soon as possible
after 2021.

The
new self aligning roller bearing is a key component of the machining center
spindle. In order to optimize the distribution of the grease inside the bearing
during grease lubrication, the long-term running-in operation is essential, and
it becomes a bottleneck for improving production efficiency. In addition, under
the condition of oil-air lubrication, the excessive temperature rise of the
bearing during low-speed operation is also an urgent issue to be solved. To
solve such problems, although the rolling element guide method can be used to
stabilize the cage position, it is easy to cause the cage to bear the excessive
load and cause early damage. Therefore, the outer ring guide method is
generally used in the industry.

New
self aligning roller bearing technical features

1.
Shorten the running time of grease

NSK
successfully developed the rolling element guide cage, which has the same
durability as existing products. By improving the shape of the cage and
improving the discharge performance of excess grease, compared with the general
outer ring guide cage, the running-in time of grease lubrication can be
shortened by about 70% at the maximum.

2.
Reduce abnormal temperature rise during oil-air lubrication

Under
the condition of oil-air lubrication, the traditional outer ring guidance
method is difficult to solve the excessive temperature rise caused by too much
lubricating oil inside the bearing at low speed. The rolling element guide
method can solve the above problems and realize the stable operation of the
main shaft during oil-air lubrication.

3.
Improve the reliability of the rolling element guide cage

Aiming
at the problem of easy damage to cages guided by rolling elements, NSK
optimized the material and shape of the cage to improve the durability
(reliability) of the cage guided by the rolling elements.

New
self aligning roller bearing development effect

This
technology can shorten the assembly time of grease-lubricated spindles and
improve the production efficiency of machine tool manufacturers. At the same
time, the abnormal temperature rise during oil-air lubrication is reduced, the
strength of the roller guide cage is improved, and high reliability is
achieved.

New
self aligning roller bearing use

In
machining centers for forming automotive parts and general mechanical parts,
the electric spindle with a built-in motor generates axial elongation due to
self-heating. Therefore, cylindrical roller bearings are generally used at the
back end of the spindle. The new technology developed by NSK this time is most
suitable for the back-end support bearing of the spindle.

The
impact of new bearings on self aligning roller bearing in the automotive industry

The
self aligning roller bearing is mainly used to complement the host industry,
including automobiles, home appliances, medical equipment and other industries.
The development of related industries will drive the demand of the industry.
China auto market has maintained a trend of rapid growth in recent years.
Considering factors such as car ownership, per capita income, and per capita
car ownership, cars are still in the incremental market and have not been
transferred to the stock market. According to the "2015-2020 China Bearing
Manufacturing Industry Production and Sales Demand Forecast and Transformation
and Upgrade Analysis Report" released by the Foresight Industry Research
Institute, the high growth rate of the automotive industry will continue for a
period of time, and the future growth rate will not be less than 15%.

With
the process of miniaturization and electrification of automobiles, the
corresponding component products are constantly increasing. Therefore, the
automotive-related parts market will continue to expand in the future. The
development of automotive bearings will focus on safety, improving efficiency
and reducing harmful substances. Automobile radiator cooling fan motor, wiper
motor, exhaust gas recirculation system (EGR) valve frame and anti-lock brake
system (ABS) represented by oil pump motors and their application systems are
the main application areas of miniature bearings.

In
particular, the self aligning roller bearing for ABS was only used for high-end
cars in the 1980s. After that, it was used as an important product for safety
measures in the direction of miniaturization and popularization, and its use
has been continuously expanded since the mid-1990s. The automobile spindle
developed at present is developing towards multi-function and safety. It not
only uses the self aligning roller bearing to control the brake intermittently,
but also links with the sensor that monitors the driving situation, and
transmits different braking forces to the front, rear, left, and right wheels.
Control safe driving as a whole. The future development trend of miniature
bearings. This system is an ABS upgrade system. Different manufacturers have
different self aligning roller bearing such as ESC, EPS, VSC and so on.

The development of ABS system is a
typical example of the development of automobile-related products. In the
future, self aligning roller bearing will derive many new application products
with increasing requirements for safety and environmental protection. The
imported bearing market aims at hybrid vehicles and electric vehicles to try to
create new types of car-related products. In this development, the field of
miniature bearings will continue to expand, and its precision will continue to
improve. With the continuous development of China\’s automobile industry, there
is huge room for domestic enterprises to develop. If you are looking for self
aligning roller bearing or get more information about self aligning roller
bearing, please send an email to sales@spark-bearing.com

The
impact of new bearings on self aligning roller bearing in the home appliance
industry

The
market scale of China household appliance industry has been expanding year by
year, and the growth rate has declined in the past two years. The Institute of
Foresight Industry predicts that the market scale of China household appliance
industry will continue to expand year by year.

The
self aligning roller bearing for home appliances represent motor bearings for
vacuum cleaners and air conditioners, mainly motors with an outer diameter of
22mm. The characteristic of the vacuum cleaner is that the rotation speed of
the motor is as high as 40,000 rpm/min, and the motor of 100,000 rpm/min has
also been used in vacuum cleaners sold in large quantities in the market. Air
conditioners are equipment used indoors for a long time and have high
requirements for low noise. The current problem is that the electrical
corrosion caused by the electrical connection between the inner and outer rings
of the self aligning roller bearing can only be solved by using non-conductive
ceramic balls, which will improve the technical level of the self aligning
roller bearing for household appliances.

The
impact of new bearings on self aligning roller bearing in the medical industry

In
recent years, the market scale of China medical device industry has maintained
rapid growth. The Prospective Industry Research Institute predicts that China
medical device industry will maintain a growth rate of more than 20%.

In
medical equipment, the use of self aligning roller bearing also involves many
aspects, mainly used for blood pumps for artificial dialysis, drug injection
pumps, and air pumps for ventilators. These devices are used on the pillow side
of the hospital bed, so they must be treated with low noise.

An
extreme example is the dental drill used by the dentist. The drill bit is
400,000 to 500,000 revolutions per minute, which is difficult for the doctor to
bear under the stimulation of the high pitch. A major issue in the name of
medical device products is the corrosion resistance of the self aligning roller
bearing to chemicals and acids. This is an issue that cannot be separated from
bearing materials.

From
the future development trend of bearings in the above application fields, the
self aligning roller bearing are mainly developed in the direction of precision
and bass, so the future development direction is the name of precision
products. In view of the wide application of precision self aligning roller bearing,
the development of various industries has increasingly higher requirements on
the accuracy, performance, life and reliability of self aligning roller
bearing, and the number of requirements is also increasing. In recent years,
China domestic machine tool industry and automobile industry have developed
rapidly. In order to meet the needs of product upgrading and replace imports,
China precision self aligning roller bearing products have a broad market
prospect.

Wuxi
Spark Bearing Co., Ltd is a modern high-tech professional high-quality roller
bearing manufacturer integrating R&D, manufacturing, sales, and service.
Our bearings are mainly supplied to OEM customers in many industries, such as
mining, petroleum, chemical, coal, cement, heavy machinery, wind power,
construction machinery, and other industries. We have a complete supply chain
and can provide customers with almost a full range of standard and non-standard
customized bearings. Welcome to send an email or click on the product to send
an inquiry for the latest price of related bearings. Looking for the self
aligning roller bearing or get more information about any other bearings,
please send an email to sales@spark-bearing.com. Or visit the following website:
https:/www.spark-bearing.com/

(New technology development of high-reliability self aligning roller bearing)