Non-maintaining ultrahigh speed angular contact ball bearing
Technical field
Bearing mnanufacture technical field is the utility model is related to, more particularly to a kind of non-maintaining ultrahigh speed angular contact ball bearing.
Background technology
With the development of modern industry, high-speed cutting requirement is increasingly highlighted, therefore very high requirement is proposed to lathe,
Can crucial main shaft bearing adapt to and meet to require among these.Machine tool mainshaft bearing uses angular contact ball bearing more at present, and one
As angular contact ball bearing rotating speed all in 10,000 below rpm, but high-speed machine tool main shaft bearing is required to meet the rpm of 20,000 rpm~80,000, is
It is met the requirement, more using traditional angular contact ball bearing, improve its precision level, lubrication uses fog lubrication.
Because fog lubrication is more complicated, oil spurts is nebulized into Bearing inner using the air of certain pressure, no
Requiring nothing more than needs a set of air compression system and oil supply system, and environmental pollution is very big.Further, since contain in air
Certain steam, the steam also enter bearing working surface after being compressed, and long-term corrosion working surface can cause bearing failure.When
In big cutting, low speed rotation, bearing is in the case of low speed heavy load base bearing, and the fog lubrication is difficult to form preferable oil
Film, bearing lubrication is insufficient, causes bearing initial failure.Further, since bearing rotating speed superelevation, contact fatigue stress is high, and its is resistance to
Mill property can not be resisted for a long time, cause bearing initial failure.
Utility model content
The technical problems to be solved in the utility model is to overcome drawbacks described above existing for prior art, there is provided one kind is exempted from
Safeguard ultrahigh speed angular contact ball bearing.
The utility model is that solve above-mentioned technical problem by following technical proposals:
A kind of non-maintaining ultrahigh speed angular contact ball bearing, it includes outer ring and inner ring, the inner surface of outer ring and inner ring it is outer
Rolling element is provided between surface;Rolling element is Ceramic Balls;The inner surface of outer ring and the outer surface of inner ring are equipped with chromium coating;Inner ring
Seal member is provided between outer ring;Outer ring, inner ring and seal member surround the region for placing lubricating grease.
It is preferred that seal member is sealing ring.
It is preferred that one end of seal member is embedded at the inner surface of outer ring, the other end of seal member is close to the outer of inner ring
Surface and do not contacted with inner ring.
It is preferred that it is additionally provided with to keep the retainer for rolling running body between outer ring and inner ring.
It is preferred that lubricating grease is provided with the region that outer ring, inner ring and seal member surround.
Positive effect of the present utility model is:By setting chromium coating on the surface of inner ring and outer ring, and will rolling
Kinetoplast is arranged to Ceramic Balls so that bearing has higher wearability, can avoid bearing should because of high rotating speed and high frequently contact
Power and there is the situation of fatigue of materials, and then avoid bearing initial failure.Lubricating system is changed to moisten by existing fog lubrication
Grease lubrication, and both sides increase sealing ring is by its grease seal, lubrication is not only realized once without the function that safeguard again, more
Solve the problems, such as the complication system needed for fog lubrication, also need to use certain pressure and the pollution to environment;Also solve
The problem of corrosion to raceway of steam in compressed air, so as to avoid bearing initial failure;Bearing is also solved to be in
The fog lubrication is difficult to form the problem of preferable oil film causes bearing lubrication insufficient in the case of low speed heavy load, and then avoids axle
Hold initial failure.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model preferred embodiment.
Embodiment
Name preferred embodiment, and become apparent from intactly illustrating the utility model with reference to accompanying drawing.
As shown in figure 1, a kind of non-maintaining ultrahigh speed angular contact ball bearing, it includes outer ring 01 and inner ring 02, outer ring 01
Rolling element 04 is provided between the outer surface of inner surface and inner ring 02 and to keep the retainer 07 that rolling element 04 is run.
Rolling element 04 is Ceramic Balls;The inner surface of outer ring 01 and the outer surface of inner ring 02 are equipped with chromium coating and (not shown on figure
Show).By the way that the surface of inner ring and outer ring is plated into one layer of chromium, its microhardness (HV) is up to 1000 or so, with improve inner ring and
The anti-wear performance of outer ring.Rolling element is changed to Ceramic Balls by common steel ball so that rolling element has higher wearability.This
Sample, bearing can be avoided the situation of fatigue of materials occur because of high rotating speed and high frequently contact stress, and then avoid bearing early stage
Failure.
Sealing ring 68 is provided between inner ring 02 and outer ring 01.One end of sealing ring 68 is embedded at the inner surface of outer ring 01, separately
One end is close to the outer surface of inner ring 02 and is not contacted with inner ring 02.Outer ring 01, inner ring 02 and sealing ring 68 are surrounded for placing profit
The region of consistent lubricant.Lubricating grease (not shown on figure) is provided with the region.
Lubricating system is changed to grease lubrication by existing fog lubrication, and both sides increase sealing ring is close by its grease
Envelope, not only realize once lubrication and, without the function of safeguarding again, more solve the complication system needed for fog lubrication, also need to use
The problem of certain pressure and pollution to environment.
Lubricating system is changed to grease lubrication by fog lubrication, solves the steam in compressed air to raceway
The problem of corrosion, so as to avoid bearing initial failure.
Lubricating system is changed to grease lubrication by fog lubrication, bearing is solved and is in the oil in the case of low speed heavy load
Mist lubrication is difficult to form the problem of preferable oil film causes bearing lubrication insufficient, and then avoids bearing initial failure.
The utility model also have it is simple in construction, manufacturing cost is low, using it is wide the advantages of.
Although the foregoing describing specific embodiment of the present utility model, it will be appreciated by those of skill in the art that
This is merely illustrative of, and the scope of protection of the utility model is defined by the appended claims.Those skilled in the art
On the premise of without departing substantially from principle of the present utility model and essence, various changes or modifications can be made to these embodiments,
But these changes and modification each fall within the scope of protection of the utility model.