CN113217548A

CN113217548A - Novel rotating electrical machine bearing sealing device

Info

Publication number: CN113217548A
Application number: CN202110682907.0A
Authority: CN
Inventors: 万亚玲; 杨家国
Original assignee: Jiangxi Tellhow Military Project Group Co ltd
Current assignee: Jiangxi Tellhow Military Project Group Co ltd
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2021-08-06

Abstract

The invention discloses a novel rotating motor bearing sealing device which comprises a rotating shaft, wherein an end cover is sleeved on the rotating shaft, a bearing chamber is formed between the end cover and the rotating shaft, a bearing is installed in the bearing chamber, an oil seal chamber is also formed on the end cover and the rotating shaft, an oil seal is arranged in the oil seal chamber, a through hole penetrating through the rotating shaft is formed in the oil seal, the oil seal comprises a protection device, and a sealing device is fixedly installed at the bottom of the protection device through a bolt. The invention solves the problem of poor sealing performance of the motor bearing sealing device in the prior art.

Description

Novel rotating electrical machine bearing sealing device

Technical Field

The invention relates to the technical field of motor bearings, in particular to a novel rotating motor bearing sealing device.

Background

At present, the high environmental adaptability is pursued by the motor, the motor is required to reliably work in the environment of rain, water splash and the like, if water enters the motor, the insulation performance of the motor is reduced, the electric strength is weakened, the motor is short-circuited, and the motor cannot work, so the bearing sealing of the motor with high protection requirement is the most important link, and the service life of the motor is determined.

The motor bearing sealing device has the functions of preventing pollutants from entering a space needing to be protected and keeping lubricating grease in the bearing. To work effectively, bearing seals must prevent contaminants and grease from passing between stationary and rotating surfaces. At present, a conventional motor bearing generally adopts graphite seal and a bearing cover or is additionally provided with an auxiliary external structure to form a closed loop, but the sealing performance is insufficient and the maintenance is difficult to meet the conditions of rain and water immersion. In order to improve the adaptability of the high-sealing environment of the motor and enable the motor to work normally in the environments of rain, water splashing and the like, a novel rotating motor bearing sealing device is provided, and in addition, the device is high in oil seal interchangeability and convenient to maintain.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, provides a novel rotating motor bearing sealing device and solves the problem that the sealing performance of the motor bearing sealing device in the prior art is not strong.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a novel rotating electrical machines bearing seal device, includes the pivot, the end cover has been cup jointed in the pivot, be formed with the bearing room between end cover and the pivot, install the bearing in the bearing room, still be formed with the oil blanket room in end cover and the pivot, the indoor oil blanket that is equipped with of oil blanket, the oil blanket includes protector, protector's bottom has sealing device through bolt fixed mounting.

Preferably, the protector includes guard plate and lower guard plate, the internally mounted of going up guard plate and lower guard plate has the buffer board, go up the guard plate and be provided with annular connecting plate down between the guard plate, and the connecting plate is located the outside of buffer board, first buffer beam and second buffer beam are installed respectively to the top and the bottom of buffer board, the dashpot corresponding with first buffer beam and second buffer beam has been seted up to the inside of buffer board, the inside that the one end that first buffer beam and second buffer beam are close to each other all extends to the dashpot, the equal fixed mounting of one end that first buffer beam and second buffer beam are located the dashpot inside has first stopper, and is provided with first spring between two first stoppers.

Preferably, the one end that goes up the guard plate and be close to each other with lower guard plate is all inwards bent and is formed and press from both sides the groove, the top fixed mounting of first buffer beam has first springy steel plate, the edge of first springy steel plate extends to the clamp inslot of supreme guard plate bottom, the bottom fixed mounting of second buffer beam has second springy steel plate, the edge department of second springy steel plate extends to the clamp inslot at lower guard plate top.

Preferably, the edge of the side that the upper protection plate and the lower protection plate are close to each other has all seted up the dead slot, the both ends of connecting plate extend to the dead slot of supreme protection plate and lower protection plate respectively, the one end fixed mounting that the connecting plate is located the dead slot has the second stopper, the dead slot of upper protection plate and lower protection plate all is provided with the second spring.

Preferably, sealing device includes stainless steel gasket and aluminium gasket respectively, be provided with asbestos gasket and rubber gasket between stainless steel gasket and the aluminium gasket respectively, and asbestos gasket and rubber gasket stagger in proper order.

Preferably, the outer surfaces of the upper protection plate and the lower protection plate are all sleeved with rubber rings.

Preferably, the axial distance between the upper oil seal chamber and the bearing chamber is D, wherein D is more than 2mm and less than 5 mm.

According to the oil seal of the rotating motor bearing sealing device, the protective device is arranged, the rubber ring is sleeved on the outer side of the protective device, when the oil seal is used, the protective device and the sealing device are matched for use, the service life of the oil seal can be prolonged, the conditions of abrasion and aging are different due to different contact areas of the sealing device and the rubber ring when the oil seal is used, even if the sealing device is damaged, the oil seal can be protected by the rubber ring on the outer layer, and therefore oil leakage and water inflow can be better avoided.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the oil seal structure of the present invention;

FIG. 3 is a cross-sectional view of the shield apparatus of the present invention;

FIG. 4 is a cross-sectional view of a baffle of the present invention;

FIG. 5 is a side view of the sealing device of the present invention;

in the figure: 1. the bearing comprises a rotating shaft, 2, an end cover, 3, a bearing chamber, 4, a bearing, 5, an oil seal chamber, 6, an oil seal, 7, a protective device, 71, an upper protection plate, 72, a buffer plate, 721, a first buffer rod, 722, a second buffer rod, 723, a buffer groove, 724, a first limiting block, 725, a first spring, 726, a first elastic steel plate, 727, a second elastic steel plate, 73, a connecting plate, 731, a second limiting block, 732, a second spring, 733, a rubber ring, 74, a lower protection plate, 8, a bolt, 9, a sealing device, 91, a stainless steel gasket, 92, an asbestos gasket, 93, an aluminum gasket, 94 and a rubber gasket.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-5, a novel rotating electrical machine bearing sealing device comprises a rotating shaft 1, an end cover 2 is sleeved on the rotating shaft 1, a bearing chamber 3 is formed between the end cover 2 and the rotating shaft 1, a bearing 4 is installed in the bearing chamber 3, an oil seal chamber 5 is further formed on the end cover 2 and the rotating shaft 1, an oil seal 6 is arranged in the oil seal chamber 5, the oil seal 6 comprises a protection device 7, and a sealing device 9 is fixedly installed at the bottom of the protection device 7 through a bolt 8. The protection device 7 includes upper protection plate 71 and lower protection plate 74, the internally mounted of upper protection plate 71 and lower protection plate 74 has buffer plate 72, be provided with annular connecting plate 73 between upper protection plate 71 and the lower protection plate 74, and connecting plate 73 is located the outside of buffer plate 72, first buffer rod 721 and second buffer rod 722 are installed respectively to the top and the bottom of buffer plate 72, buffer slot 723 corresponding with first buffer rod 721 and second buffer rod 722 has been seted up to the inside of buffer plate 72, the inside that the one end that first buffer rod 721 and second buffer rod 722 are close to each other all extends to the buffer slot 723, first buffer rod 721 and second buffer rod 722 are located the equal fixed mounting of the inside one end of buffer slot 723 and are provided with first stopper 724, and are provided with first spring 725 between two first stopper 724. Through setting up protector 7 to be equipped with upper protection plate 71 and lower protection plate 74 on protector 7, when using, use through protector 7 and sealing device 9 cooperation, can increase the life of oil blanket 6, because sealing device 9 and rubber ring 733 area of contact are different when using, consequently the condition that wearing and tearing and ageing appear is also different, even sealing device 9 appears damaging, also can protect through outer rubber ring 733, thereby the condition that oil leak and intaking appear can be better avoided. Thereby can avoid influencing the operation of equipment, bolt 8 fixed mounting has sealing device 9 in addition in protector 7's bottom, conveniently dismantles protector 7 and maintains or change, and is more labour saving and time saving, only need change the part that damages moreover, can reduce cost. When using, can be according to the actual production needs, adjustment protector 7 and sealing device 9's thickness, thereby can enlarge application range, sealing device 9 includes stainless steel gasket 91 and aluminium gasket 93 respectively, be provided with asbestos gasket 92 and rubber gasket 94 between stainless steel gasket 91 and the aluminium gasket 93 respectively, and asbestos gasket 92 and rubber gasket 94 are crisscross in proper order, through setting up stainless steel gasket 91 and aluminium gasket 93, when realizing sealed effect, can strengthen sealing device's intensity, make sealing device be difficult to receive wearing and tearing, be favorable to the life of extension equipment.

The protective device 7 comprises an upper protective plate 71 and a lower protective plate 74, the outer surfaces of the upper protective plate 71 and the lower protective plate 74 are respectively sleeved with a rubber ring 733, the connection between the devices can be more compact by arranging the rubber ring 733, a buffer plate 72 is arranged inside the upper protective plate 71 and the lower protective plate 74, an annular connecting plate 73 is arranged between the upper protective plate 71 and the lower protective plate 74, the connecting plate 73 is positioned outside the buffer plate 72, the annular connecting plate 73 is arranged, external oil stains and impurities can be prevented from entering the protective device, erosion to the buffer device can be avoided, a first buffer rod 726 and a second buffer rod 727 are respectively arranged at the top and the bottom of the buffer plate 72, a buffer groove 723 corresponding to the first buffer rod 726 and the second buffer rod 727 is arranged inside the buffer plate 102, one end of the first buffer rod 726 and one end of the second buffer rod 727, which are close to each other, extend to the inside of the buffer groove 723, the first buffer rod 726 and the second buffer rod 727 are fixedly provided with a first limit block 724 at one end inside the buffer groove 723, a first spring 725 is arranged between the two first limit blocks 724, when the protection device moves up and down, the upper protection plate 101 can extrude the first buffer rod 726 and the second buffer rod 727, then the upper protection plate 71 and the lower protection plate 74 contract into the buffer plate 72 and extrude the first spring 725, so that the rigidity force applied to the protection device 7 can be buffered, the ends, close to each other, of the upper protection plate 71 and the lower protection plate 74 are bent inwards to form a clamping groove, the top of the first buffer rod 726 is fixedly provided with a first elastic steel plate 726, the edge of the first elastic steel plate 726 extends into the clamping groove at the bottom of the upper protection plate 71, the bottom of the second buffer rod 727 is fixedly provided with a second elastic steel plate 727, the edge of the second elastic steel plate 727 extends into the clamping groove at the top of the lower protection plate 74, through setting up elastic steel plate, not only can strengthen protector's buffering dynamics, can increase rigidity intensity moreover, make protector more durable.

In summary, according to the oil seal 6 of the sealing device for the bearing of the rotating electrical machine, the protective device 7 is arranged, the rubber ring 733 is sleeved on the outer side of the protective device 7, when the oil seal is used, the protective device 7 and the sealing device 9 are used in a matched mode, the service life of the oil seal 6 can be prolonged, the sealing device 9 and the rubber ring 733 are different in contact area when the oil seal is used, therefore, the abrasion and aging conditions are different, even if the sealing device 9 is damaged, the oil seal can be protected through the rubber ring 733 on the outer layer, and therefore oil leakage and water inflow can be better avoided.

The above-described embodiments are illustrative of the present invention and not restrictive, it being understood that various changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. The utility model provides a novel rotating electrical machine bearing seal device, includes pivot (1), end cover (2) have been cup jointed in pivot (1), be formed with bearing room (3) between end cover (2) and pivot (1), install bearing (4) in bearing room (3), still be formed with oil blanket room (5) on end cover (2) and pivot (1), be equipped with oil blanket (6) in oil blanket room (5), set up through-hole (10) that run through pivot (1) on oil blanket (6), oil blanket (6) are including protector (7), there are sealing device (9) bottom through bolt (8) fixed mounting of protector (7).

2. The novel rotating electrical machine bearing seal assembly of claim 1, wherein: the protection device (7) comprises an upper protection plate (71) and a lower protection plate (74), a buffer plate (72) is arranged inside the upper protection plate (71) and the lower protection plate (74), an annular connecting plate (73) is arranged between the upper protection plate (71) and the lower protection plate (74), the connecting plate (73) is located on the outer side of the buffer plate (72), a first buffer rod (721) and a second buffer rod (722) are respectively arranged at the top and the bottom of the buffer plate (72), a buffer groove (723) corresponding to the first buffer rod (721) and the second buffer rod (722) is formed in the buffer plate (72), one ends, close to each other, of the first buffer rod (721) and the second buffer rod (722) all extend into the buffer groove (723), a first limiting block (724) is fixedly arranged at one end, located inside the buffer groove (723), of the first buffer rod (721) and the second buffer rod (722), and a first spring (725) is arranged between the two first limit blocks (724).

3. The novel rotating electrical machine bearing seal assembly of claim 2, wherein: go up guard plate (71) and lower guard plate (74) one end that is close to each other all inwards bend and form and press from both sides the groove, the top fixed mounting of first buffering pole (721) has first elastic steel board (726), the edge of first elastic steel board (726) extends to the clamp inslot of guard plate (71) bottom, the bottom fixed mounting of second buffering pole (722) has second elastic steel board (727), the edge department of second elastic steel board (727) extends to the clamp inslot at lower guard plate (74) top.

4. A novel sealing arrangement for a bearing of a rotating electrical machine according to claim 3, wherein: the edge of going up guard plate (71) and one side that guard plate (74) are close to each other down has all seted up the dead slot, the both ends of connecting plate (73) extend to the dead slot of supreme guard plate (71) and lower guard plate (74) respectively, the one end fixed mounting that connecting plate (73) are located the dead slot has second stopper (731), all be provided with second spring (732) in the dead slot of going up guard plate (71) and lower guard plate (74).

5. The novel rotating electrical machine bearing seal assembly of claim 1, wherein: sealing device (9) include stainless steel gasket (91) and aluminium gasket (93) respectively, be provided with asbestos gasket (92) and rubber gasket (94) between stainless steel gasket (91) and aluminium gasket (93) respectively, and asbestos gasket (92) and rubber gasket (94) are crisscross in proper order.

6. The novel rotating electrical machine bearing seal assembly of claim 4, wherein: the outer surfaces of the upper protection plate (71) and the lower protection plate (74) are all sleeved with rubber rings (733).

7. The novel rotating electrical machine bearing seal assembly of claim 1, wherein: the axial distance between the upper oil seal chamber (5) and the bearing chamber (3) is D, wherein D is more than 2mm and less than 5 mm.