Angular Contact Ball Bearing for Steam Turbine-generators

Angular Contact Ball Bearing for Steam Turbine-generators

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 10 PCS

Supply Capability:: 200000 PCS/month

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Specifications

QJ238M Angular Contact Ball Bearing for steam turbine-generators
1.High precition and long life
2.high quality

QJ238M Angular Contact Ball Bearing for steam turbine-generators

Angular contact ball bearings are particularly suitable for carrying combined (axial and radial) loads. Sometimes, they also can carry pure axial load and operate in higher speed. Under radial load, axial component force will be produced which must be counteracted. So the bearings are normally adjust against a second bearing.

Four Points Angular Contact Ball Bearing product specifications

Bearing NO.	Size(mm)			weight(kg)
Bearing NO.	d	D	B	weight(kg)
QJ206M	30	62	16	0.24
QJ207M	35	72	17	0.36
QJ208M	40	80	18	0.45
QJ209M	45	85	19
QJ210M	50	90	20	0.52
QJ211M	55	100	21	0.77
QJ212M	60	110	22	0.99
QJ213M	65	120	23	1.2
QJ214M	70	125	24	1.32
QJ215M	75	130	25	1.45
QJ216M	80	140	26	1.85
QJ217M	85	170	28	2.25
QJ218M	90	160	30	2.75
QJ219M	95	170	32	3.35
QJ222M	100	180	34	4.05
QJ224M	120	215	40	6.95
QJ226M	130	230	40	7.75
QJ228M	140	250	42	9.85
QJ230M	150	270	45	12.5
QJ232M	160	290	48	15.5
QJ234M	170	310	52	19.5
QJ236M	180	320	52	20.5
QJ238M	190	340	55
QJ244M	220	400	65
QJ246N2M
QJ252N2M	260	480	80

Angular Contact Ball Bearing for Steam Turbine-generators

FAQ:

Q:What's my consideration when I choose a bearing?

A:- The type and size of bearing you need.

- The quality or application you prefer.

Q: What's bearing's advantage.

A: - Substantial inventory, unified quality control,save much cost and time for customers.

Q: What's your guarantee on quality problem?

A: - Free to change in 2 month and in your next order,10% value of order can be paid after receiving goods and checking out no quality issues.

Q: Can I be a distributor of TIANHE?

A: Of course you can.

Q:What are the benefits of being a TIANHE distributor?

A:-Special Discount

-Marketing Protection

-Priority Delivery than other orders.

-Point to point technical supports and after sales services.

Q:How can I become a distributor of TIANHE?

A: Contact us immediately for further details by sending us an inquiry.

Packaging & Delivery

Packaging Details:	in cartons or as per customer's requirements
Delivery Detail:	25-30 days after getting the deposit

Q: What are the commonly used journal bearings?: Split bearing more than two parts. In order to improve the friction properties of the bearing surface, it is often to cast a layer or two layers of antifriction material on its inner surface, called the bearing lining, that is, the Bush is made of double metal structure or three metal structure. The bearing and the bearing seat do not allow relative movement. In order to prevent the movement of the Bush, the flanges at both ends of the bush can be used for axial positioning or fixed on the bearing seat by means of pins (or screws).

Q: What are the structures of journal bearings, rolling bearings or plain bearings?: As far as I know, there seems to be no uniform standard in our country at the moment. So I'm sorry, but I still can't provide you with the organization chart. Supplement:Disclaimer: my previous answer was mixed and invalid!!! Totally agree with the frozen answer!!!Today's journal bearings are mostly used in the field of automobile technology.

Q: What is the axial series momentum of plain bearings?: Rolling bearings are widely used in various machines and institutions because of their small friction resistance, quick start-up, high efficiency, high rotating accuracy, simple lubrication and easy assembly and disassembly. Rolling bearings are standard parts, which are produced by the bearing factory in large quantities, and the designers can choose them directly according to their needs. 14.2.2 rolling bearing type and characteristics, according to the shape of the rolling body, rolling bearings are divided into ball bearings and roller bearings. According to the main direction of load bearing can bear, can be divided into radial bearings (mainly bear radial load, thrust bearing) (axial load), thrust bearing (can bear radial load and axial load).

Q: Drive shaft maximum speed 5000rpm, oil lubrication, load is not big. Our other models of synchronous belt drive is matched with ball bearings, try sliding bearings (we call sleeve), showed the problem is increasing, the temperature rise increases torque and wear increase, this feeling is not reasonable collocation problems, because the synchronous belt requires relatively large feeding force piece, this will bring the radial the pressure between the shaft and the sleeve, resulting in large friction. Only their own analysis, the lack of theoretical basis.: As long as the speed, load, lubrication and other conditions meet the working conditions of sliding bearings, it is appropriate.The speed is 5000rpm, too high.

Q: What is a sliding bearing alloy?: 1, sufficient strength and hardness; 2, high wear resistance and small friction coefficient;

Q: What is the clearance of plain bearings?: To leave a certain axial clearance, which refers to the axis of the movement of the gap, but also divided into thrust gap and expansion gap. The thrust clearance is the clearance left for the thrust bearing to allow for axial movement. The expansion clearance is the clearance left to the bearing in accordance with the radial load in order to ensure the free expansion of the shaft. The size of the gap is related to the accuracy of the machine in operation, the smaller the radial clearance, the higher the accuracy, but the gap narrowed to a certain extent, it can not guarantee liquid lubrication. When the clearance is too large, it will generate pulsation in the rotation, and can not form a stable oil film lubrication. Therefore, the radial gap value can not be arbitrarily specified, should comply with the requirements of the machine technical documents. The radial clearance of plain bearings is very important, too large and too small to be extremely harmful. The gap is too large, the lubricating oil film bearing is formed, can not guarantee the liquid lubrication, and can reduce the operation of the machine precision, even violent vibration and noise, would cause serious accidents; the gap is too small, it is also difficult to form a lubricating oil film, will have a high fever, serious accident will occur. The sliding bearing should be provided with an axial clearance to allow the axle to flex freely when the temperature changes. Generally speaking, in order to improve the running accuracy of the shaft, the axial clearance is smaller. But not too small, axial clearance is too small, high heat occurs in the operation may produce bite phenomenon, or even damage bearings, accidents.

Q: How to use the method of pressing lead wire check bearing bearing clearance?: Open the cylinder cover, the lead wire on the top of the piston, the cylinder head cover with cylinder head bolts, rotate the crankshaft piston across the TDC,

Q: What is the effect of clearance on sliding bearings?: 1, the gap between bearings and bearings.2, bearings radial series gapThe first kind of clearance will cause the bearing or bush to be damaged, and the lubrication oil pressure will be reduced. The gap is too small, which will make the bearing or bearing load increase sharply and even burn (tile)The second kind of clearance is too big, the bearing will move back and forth in the radial direction, the whole machine is not stable, the gap is too small, so that the load of the machine increases

Q: What are the criteria for calculating the failure modes of non liquid lubricated journal bearings?: Wear: wear, so that the gap between the increase, the clearance of the ambassador normal operating conditions damage, noise.Bonding: friction heating causes the oil temperature to rise, the viscosity of the oil drops, and the lubricating conditions deteriorate, resulting in scuffing.

Q: What are the lubrication methods of plain bearings?: Many types of sliding bearing, manufacturing materials, credit conditions and the important degree of difference, so the lubricant requirements vary, the Chongqing auto parts of sliding bearings commonly used lubricants are briefly reviewed. (1) lubricating oil. Lubricating oil is the most widely used lubricant in sliding bearings, and most of the lubricants currently used are mineral oils. The main indexes of lubricating oil are viscosity, oiliness, extreme pressure, chemical stability, etc. when selecting lubricating oil, speed, load and working condition should be taken into account. For large load, high temperature bearings, it is better to choose lubricating oil with high viscosity, small load and high speed bearing, it is better to choose less viscous lubricating oil. (2) grease. Grease is a mixture of lubricating oils and various thickening agents (such as calcium, sodium, aluminum and other metal soaps). Grease is used to form a film that separates the sliding surface. Grease seal is simple, do not need to add often, not easy to drain. But grease is easy to change, friction loss, no cooling effect, it is often used for those who are not demanding, difficult to often oil, or low speed, heavy load and not often used.

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