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Sliding bearing of motor

A sliding bearing and tile body technology, applied in the field of motor sliding bearings, can solve the problems of high production cost, damage to the bearing oil film, electrical corrosion of the inner hole of the bearing, etc., to improve the bearing capacity and critical speed, avoid the generation of friction and save The effect of production costs

Active Publication Date: 2013-09-18
宁波益明轴承有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the motor sliding bearings are actually in the mixed lubrication state when they are working, that is, the boundary lubrication and liquid lubrication coexist. Therefore, when the load increases and the speed increases, the PV value increases, ( PV value—a parameter that reflects the friction power consumption and heat generation per unit area) The larger the PV, the higher the temperature rise of the bearing, which will easily cause the rupture of the boundary oil film, resulting in damage to the bearing and affecting the safe operation of the unit
The traditional solution is to set up a water cavity in the bearing body and use the cooling water flow to take away the heat of the bearing. However, this kind of bearing has a complicated structure and requires a special mold to make the water cavity. The production cost is high, and due to the particularity of the motor and other equipment, The rotating shaft carries a voltage, and the conduction of water will form a path for the current, which will cause electrical corrosion with the inner hole of the bearing, destroy the oil film of the bearing, and make the bearing invalid. Therefore, how to make the bearing have an insulating function is also a problem that needs to be solved.
Existing motor bearings are shown in JB / T5888-2005, which isolates the shaft current path by pasting a polytetrafluoroethylene film on the inner ball of the bearing seat to isolate the bearing bush, but this structure cannot realize the setting of the bearing water cooling function. Moreover, the insulating film is easily damaged during installation and maintenance, and the repair process after damage is quite complicated, requiring special tooling, which causes great inconvenience

Method used

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Embodiment Construction

[0012] Below in conjunction with accompanying drawing, technical solution of the present invention will be further described: as figure 1 , figure 2 , image 3 , Figure 4 As shown, the motor sliding bearing of the present invention is composed of upper and lower halves, and the upper and lower halves of the tile body 4 are respectively provided with an insulating layer 3 and a tile pad 1, and the insulating layer 3 is attached to the outer surface of the tile body 4, and is connected with the tile body The inner hole of the pad 1 has a better contact surface. The inner hole of the tile pad 1 is provided with a water flow groove and a sealing ring groove. The interface 12 communicates with the groove, and the sealing ring groove is set around the water flow groove. After the tile pad 1 is installed in the sealing ring 2 and the tile body 4 is positioned with the insulating pin 5, it is fastened with the bolt with the insulating sleeve 5. And on the outer side of insulating...

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Abstract

The invention belongs to the technical field of mechanical equipment bearings and particularly relates to a sliding bearing of a motor. The sliding bearing consists of an upper half part and a lower half part and comprises a tile body, tile pads, insulating layers, a sealing ring, insulating pins, insulating sleeves and bolts. The sliding bearing is characterized in that the outer surfaces of the upper half and the lower half of the tile body are respectively provided with the tile pad; the insulating layers are arranged between the tile pads and the tile body, and after the insulating pins are used for positioning, the bolts with the insulating sleeves are adopted for fastening; the inner surface of the tile pad is provided with a water flow channel; and the sealing ring is arranged around the water flow channel. Due to adoption of the scheme, the sliding bearing has the beneficial effects that (1) the structure of a water cavity is simple, the sealing is reliable, and compared with the traditional water-cavity bearing, the contact area of cooling water is large, the cooling effect is good, and special molds do not need to be used for manufacture, so that the production cost is greatly saved; (2) the insulating structure is ingeniously arranged, so that the generation of friction pairs is effectively avoided and the insulating effect is more reliable; and (3) due to combined use of the water cooling function and the insulating function, the bearing of the motor has the insulating characteristic, the bearing capability and the critical speed of rotation are improved, and the use performance is greatly enhanced.

Description

technical field [0001] The invention belongs to the technical field of mechanical equipment bearings, in particular to a motor sliding bearing. Background technique [0002] With the development of the national economy and the implementation of the national energy policy, all kinds of electrical equipment are developing in the direction of large-scale and high-efficiency. Therefore, the increase of the diameter of the rotor and the increase of the rotational speed put forward higher requirements for its supporting part - the sliding bearing, which is mainly manifested in: how to improve its carrying capacity and critical speed and how to prevent the axial current from destroying the oil film of the sliding bearing. [0003] At present, most of the motor sliding bearings are actually in the mixed lubrication state when they are working, that is, the boundary lubrication and liquid lubrication coexist. Therefore, when the load increases and the speed increases, the PV value in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C17/12F16C37/00H02K5/167
Inventor 吴彩霞
Owner 宁波益明轴承有限公司
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