WO2022127375A1 - 一种用于轴承润滑的密封结构 - Google Patents

一种用于轴承润滑的密封结构 Download PDF

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Publication number
WO2022127375A1
WO2022127375A1 PCT/CN2021/125641 CN2021125641W WO2022127375A1 WO 2022127375 A1 WO2022127375 A1 WO 2022127375A1 CN 2021125641 W CN2021125641 W CN 2021125641W WO 2022127375 A1 WO2022127375 A1 WO 2022127375A1
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WIPO (PCT)
Prior art keywords
bearing
grease
sealing structure
groove
lubrication
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Application number
PCT/CN2021/125641
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English (en)
French (fr)
Inventor
佘宝瑛
郭四洲
梅荣海
李海江
曹佳伟
闫晓凡
黄宏臣
代彦宾
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中车株洲电机有限公司
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Publication of WO2022127375A1 publication Critical patent/WO2022127375A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6622—Details of supply and/or removal of the grease, e.g. purging grease
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6607—Retaining the grease in or near the bearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6629—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/723—Shaft end sealing means, e.g. cup-shaped caps or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/07—Fixing them on the shaft or housing with interposition of an element
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings

Definitions

  • the invention relates to the technical field of bearing lubrication, in particular to a sealing structure for bearing lubrication.
  • the bearing is an important part of the motor, which is mainly used to support the rotor of the motor to ensure its normal and stable high-speed rotation.
  • the running state of the bearing directly affects the normal operation of the motor.
  • Good lubrication of bearings needs to be guaranteed by suitable lubrication and sealing arrangements, especially for high-speed motors, which are very important for grease-lubricated large roller bearings.
  • the inner and outer bearing caps of the bearing are respectively provided with inner and outer annular grease storage chambers, however, the grease in the annular grease storage chamber will be unstable due to the shearing and dragging action of the bearing, and due to the annular
  • the grease in the upper part of the grease storage chamber is prone to collapse at high temperature, and a stable grease storage wall cannot be established, so that the grease in the grease storage chamber cannot be effectively connected to the side of the bearing, which will lead to the failure to reach the bearing.
  • a continuous supply of base oil cannot ensure good lubrication of the bearings.
  • the purpose of the present invention is to provide a sealing structure for bearing lubrication, which can realize the continuous supply of base oil to the rolling bearing, thereby effectively solving the problem of poor lubrication of large bearings in high-speed motors and extending the service life of the bearings.
  • the present invention provides a sealing structure for bearing lubrication, comprising a bearing seat for installing the bearing and an outer retaining ring for preventing grease from splashing outward, the bearing seat is provided with at least two flanges.
  • the bearing seat is provided with at least two flanges.
  • Circumferentially distributed inner grease storage chambers the outer baffle ring is provided with at least two outer grease storage chambers distributed along the circumferential direction, and any two adjacent inner grease storage chambers and any two adjacent outer grease storage chambers.
  • Ribs are arranged between the grease storage chambers, the ribs in the bearing seat are provided with a first through groove for the grease to enter the bearing, and the bearing seat is also provided with a grease injection port and a connection with the bearing seat.
  • the grease injection port communicates with the first grease injection channel of the first through groove.
  • it also includes a solid block disposed in the bearing seat and close to the top of the bearing seat.
  • the solid block is provided with a second through groove for allowing grease to enter the bearing, and the bearing seat is further provided with a second grease injection channel communicated with the grease injection port and the second through groove .
  • first through groove and the second through groove are separated by 180° in the circumferential direction.
  • all the inner grease storage chambers, all the rib plates and the solid blocks in the bearing seat are integrally formed by a milling cutter.
  • it also includes an arc-shaped grease outlet provided at the lower part of the inner rib of the outer grease chamber and used for discharging the grease in the bearing.
  • the number of the arc-shaped grease discharge ports is two, and the two arc-shaped grease discharge ports are symmetrically distributed with respect to the central axis of the cross-section of the outer baffle ring.
  • all the outer grease storage chambers, all the arc-shaped grease discharge ports, and all the rib plates in the outer baffle ring are integrally formed by a milling cutter.
  • it also includes an outer oil seal fixed to the outside of the bearing, the outer oil seal and the outer retaining ring form a labyrinth grease discharge channel for discharging excess grease.
  • it also includes an outer bearing cover that is fixed to the bearing seat by bolts, and the outer bearing cover is provided with the inside of the outer bearing cover, which is communicated with the labyrinth grease removal channel and is used to collect waste discharged from the labyrinth grease removal channel.
  • Grease collection chamber for waste fat is also included.
  • the sealing structure for bearing lubrication includes a bearing seat and an outer retaining ring, wherein the bearing seat is used to install the bearing, and the outer retaining ring is used to prevent the grease in the bearing from flowing into the bearing.
  • the outer splash, the bearing seat is provided with at least two inner grease storage chambers distributed along the circumferential direction
  • the outer baffle ring is provided with at least two outer grease storage chambers distributed along the circumferential direction
  • any two adjacent inner grease storage chambers are arranged between any two adjacent inner grease storage chambers.
  • Ribs are provided, and ribs are also arranged between any two adjacent outer grease storage chambers; further, the ribs in the bearing seat are provided with a first through groove, and the first through groove is used for lubricating grease to enter the bearing , the bearing seat is also provided with a grease injection port and a first grease injection channel, and the first grease injection channel is communicated with the grease injection port and the first through groove.
  • the sealing structure for bearing lubrication provided by the embodiments of the present invention, on the one hand, by arranging rib plates between the adjacent inner grease storage chambers and the adjacent outer grease storage chambers, it can reduce the amount of grease being affected by the grease when the bearing is running.
  • the unstable situation caused by the circumferential drag of the bearing ensures the stable establishment of the lubricating walls of the inner and outer grease storage chambers on both sides of the bearing, so that the grease can be closely connected to the side of the bearing and continuously supplied to the bearing.
  • the base oil can ensure good lubrication of the bearing; on the other hand, the new grease injected from the grease injection port of the bearing seat can directly enter the bearing through the first grease injection channel and the first through groove, so as to realize the lubrication of the bearing. good lubrication.
  • the above setting method can realize the continuous supply of base oil to the rolling bearing, thereby effectively solving the problem of poor lubrication of the large bearing in the high-speed motor, which is beneficial to prolong the service life of the bearing, and realize less maintenance or even maintenance-free of the bearing.
  • FIG. 1 is a schematic diagram of an assembly structure of a sealing structure for bearing lubrication provided by an embodiment of the present invention
  • Figure 2 is a schematic diagram of the internal structure of the bearing seat in Figure 1;
  • FIG. 3 is a schematic diagram of the internal structure of the outer retaining ring in FIG. 1 .
  • the core of the invention is to provide a sealing structure for bearing lubrication, which can realize the continuous supply of base oil to the rolling bearing, thereby effectively solving the problem of poor lubrication of large bearings in high-speed motors, and helping to prolong the service life of the bearings.
  • FIG. 1 is a schematic diagram of the assembly structure of a sealing structure for bearing lubrication provided by an embodiment of the present invention
  • FIG. 2 is a schematic diagram of the internal structure of the bearing seat in FIG. 1
  • 1 Schematic diagram of the internal structure of the middle and outer retaining rings.
  • the direction of the arrow in Fig. 1 is the flow direction of the grease.
  • the sealing structure for bearing lubrication provided by the embodiment of the present invention is mainly provided in a high-speed motor, and includes: a rotating shaft 1, an outer oil seal 2, an outer bearing cover 3, an outer retaining ring 4, a rolling bearing 5, Bearing seat 6 and inner retaining ring 7.
  • the inner ring of the rolling bearing 5 is fixed on the rotating shaft 1, and the two sides are respectively positioned axially by the outer oil seal 2 and the inner retaining ring 7.
  • the bearing seat 6 is used to install the bearing 5 and the bearing 5
  • the outer ring is installed in the bearing seat 6, and the outer bearing cover 3 and the bearing seat 6 are connected by bolts to compress the outer retaining ring 4 and make it axially mounted on the bearing seat 6, so as to realize the axial positioning of the outer ring of the bearing 5 , the outer retaining ring 4 is used to prevent the grease in the bearing 5 from splashing outward.
  • the bearing seat 6 is provided with at least two inner grease storage chambers 61 distributed along the circumferential direction
  • the outer baffle ring 4 is provided with at least two outer grease storage chambers 41 distributed along the circumferential direction
  • any two adjacent inner grease storage chambers 41 are provided.
  • a rib 62 is provided between the grease chambers 61, and a rib 62 is also provided between any two adjacent outer grease storage chambers 41; compared with the prior art, an annular grease storage chamber distributed 360° in the circumferential direction is provided.
  • the inner fat storage chambers 61 and the outer fat storage chambers 41 provided by the embodiment of the present invention are provided with a plurality of them along the circumferential direction, and between two adjacent inner fat storage chambers 61 and between two adjacent outer fat storage chambers 41
  • the ribs 62 By setting the ribs 62, the circumferential drag from the bearing 5 on the grease can be reduced to a certain extent, which is conducive to the stable establishment of the lubricating walls of the grease storage chambers on both sides, so as to closely fit the side of the bearing 5.
  • a grease injection channel is set on the bearing seat, and the grease injection channel is connected with the inner grease storage chamber.
  • the old grease in the grease chamber is squeezed into the bearing for lubrication, so that the bearing 5 is poorly lubricated.
  • the rib plate 62 in the bearing seat 6 is provided with a first through groove 621, the first through groove 621 is used for the grease to enter the bearing 5, and the bearing seat 6 is further provided with a grease injection port 64 and The first grease injection channel 65 communicates with the grease injection port 64 and the first through groove 621 .
  • the ribs 62 are arranged between the adjacent inner grease storage chambers 61 and the adjacent outer grease storage chambers 41, so that the bearing 5. It can reduce the instability of the grease due to the circumferential drag of the bearing 5 during operation, and ensure the stable establishment of the lubricating walls of the inner and outer grease chambers on both sides of the bearing 5, so that the grease and the bearing 5 can be realized.
  • the sides are closely connected and connected to continuously supply base oil to the bearing 5, thereby ensuring good lubrication of the bearing 5; on the other hand, the new grease injected from the grease port 64 of the bearing seat 6 can pass the first grease
  • the channel 65 directly enters the bearing 5 through the first through groove 621 , so as to achieve good lubrication of the bearing 5 .
  • the above arrangement can realize the continuous supply of base oil to the rolling bearing 5, thereby effectively solving the problem of poor lubrication of the large bearing 5 in the high-speed motor, which is beneficial to prolong the service life of the bearing 5, and realize less maintenance or even maintenance-free of the bearing 5.
  • a solid block 63 is also provided in the bearing seat 6, and the solid block 63 is arranged in the bearing seat 6 near the top.
  • the solid block 63 Specifically, it can be set as an arc-shaped solid block 63 .
  • the grease here is prone to collapse under high temperature, so that a stable lubrication wall cannot be established in the grease storage chamber.
  • the structure of solid block 63 is used to fill the grease storage chamber to avoid the high temperature collapse of the grease in the upper part of the grease storage chamber, so that the collapsed grease re-enters the bearing 5 and stirs, resulting in abnormal temperature rise of the bearing 5 .
  • a second through groove 631 is provided on the side of the solid block 63 close to the grease injection port 64 , which has the same function as the first through groove 621 .
  • the bearing seat 6 is further provided with a second grease injection channel 66 , and the second grease injection channel 66 communicates with the grease injection port 64 and the second through groove 631 .
  • the new grease injected from the grease injection port 64 of the bearing seat 6 can also directly enter the bearing 5 through the second grease injection channel 66 and the second through groove 631 , thereby Good lubrication of the bearing 5 is achieved.
  • the above-mentioned second through groove 631 and the first through groove 621 can be set to be separated by 180° in the circumferential direction, and the first through groove 621 and the second through groove 631 include U-shaped, elongated, etc. Everything facilitates the entry of grease into the structure of bearing 5.
  • the new grease injected from the grease injection port 64 of the bearing seat 6 can pass through the first grease injection channel 65 and the second grease injection channel 66 and through the first through groove 621 respectively. and the second through groove 631 directly into the bearing 5 , thereby realizing bidirectional grease replenishment, which is beneficial to the good lubrication of the bearing 5 .
  • the grease injection channel and the setting of the corresponding through groove can also be added, which is not specifically limited in this article.
  • all the inner grease chambers 61, all the ribs 62 and the solid blocks 63 provided in the bearing seat 6 can be integrally formed by milling cutters, which is beneficial to mass production, thereby improving production efficiency.
  • an arc-shaped grease outlet 42 disposed at the lower part of the inner rib of the outer grease chamber 41 is also included, and the arc-shaped grease outlet 42 is used for discharging the grease in the bearing 5 .
  • the grease in the bearing 5 will be discharged through the gap between the outer oil seal 2 and the outer retaining ring 4, if the gap is too large, the grease in the bearing 5 will be discharged excessively, so that the bearing 5 has a poor lubrication effect. If the clearance is too small, it is not conducive to the discharge of the grease in the bearing 5, and it is easy to cause the temperature in the bearing 5 to be too high. Therefore, by setting the arc-shaped grease outlet 42, the clearance between the outer oil seal 2 and the outer retaining ring 4 can be effectively optimized, thereby The grease in the bearing 5 can be discharged from the bearing 5 on the premise that the lubrication of the bearing 5 is more favorable and the temperature in the bearing 5 is prevented from being too high.
  • the number of the above-mentioned arc-shaped grease discharge ports 42 is two, and the two arc-shaped grease discharge ports 42 are symmetrically distributed with respect to the central axis of the cross-section of the outer baffle ring 4 .
  • the above arrangement can enhance the discharge capacity of the grease in the bearing 5, so as to solve the problem of difficult grease discharge in the prior art, and at the same time, it can avoid excessive grease discharge like the centrifugal oil and grease discharge structure, so as to ensure the temperature rise of the bearing 5. Lubrication effectively matches the balance.
  • the number of the arc-shaped grease discharge ports 42 can be increased to more than two.
  • the number and size of the arc-shaped grease discharge ports 42 are not specifically limited in this paper, provided that the best matching of temperature rise and lubrication is achieved. It is better to configure according to the setting principle.
  • the above configuration can ensure that the bearing 5 can be continuously lubricated to keep it well lubricated, and the excess grease in the bearing 5 can also be discharged in time, so that the lubrication and temperature rise of the high-speed motor bearing 5 can be achieved. Good balance, thereby greatly extending the service life of the bearing 5, and realizing less maintenance or even maintenance-free of the bearing 5.
  • the outer oil seal 2 and the outer retaining ring 4 fixed on the outer side of the bearing 5 are formed with a labyrinth grease discharge channel 8, and the labyrinth grease discharge channel 8 is used for discharging excess grease.
  • the outer bearing cover 3 is provided with a waste grease collection chamber 9 , which is communicated with the labyrinth grease discharge channel 8 , and is used for collecting waste grease discharged from the labyrinth grease discharge passage 8 .
  • the waste fat discharged through the labyrinth fat discharge channel 8 can be collected in the waste fat collection cavity 9, and when the waste fat collection cavity 9 is full, it can be discharged to the outside through the waste fat discharge port.
  • the direction of the oil circuit in the device is shown by the arrow in FIG. 1 .
  • the new grease injected from the grease injection port 64 of the bearing seat 6 can pass through the first grease injection channel 65 . and the second grease injection channel 66 and directly enter the bearing 5 through the first through groove 621 and the second through groove 631 respectively, and the lubricated grease can enter into the waste through the arc-shaped grease outlet 42 and the labyrinth grease outlet 8 in succession.
  • the grease collection chamber 9 is then discharged to the outside through the waste grease discharge port.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

一种用于轴承润滑的密封结构，包括用以安装轴承的轴承座以及用以防止润滑脂向外飞溅的外挡环，所述轴承座设有至少两个沿周向分布的内储脂室，所述外挡环设有至少两个沿周向分布的外储脂室，且任意两个相邻所述内储脂室和任意两个相邻所述外储脂室之间均设有筋板，所述轴承座内的所述筋板设有用以供润滑脂进入轴承中的第一贯通槽，所述轴承座还设有注脂口以及与所述注脂口和所述第一贯通槽连通的第一注脂通道。上述用于轴承润滑的密封结构可以实现向滚动轴承持续供给基础油，从而有效解决高速电机中大轴承润滑不良的问题，有利于延长轴承的使用寿命，实现轴承少维护，乃至免维护。

Description

一种用于轴承润滑的密封结构
本申请要求于2020年12月14日提交中国专利局、申请号为202011466088.8、发明名称为“一种用于轴承润滑的密封结构”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及轴承润滑技术领域，特别涉及一种用于轴承润滑的密封结构。
背景技术
轴承是电机的重要部件，主要用于支撑电机转子以确保其正常平稳的高速旋转，轴承运转状态好坏直接影响电机的正常运用。轴承良好润滑需要有合适的润滑密封配置得以保障，尤其针对高速运转的电机脂润滑滚柱大轴承至关重要。
现有技术中，轴承的内、外轴承盖上分别设有内、外环形储脂室，然而，环形储脂室中的润滑脂会受到轴承运转剪切拖动作用而不安定，且由于环形储脂室上部的润滑脂在高温下容易出现塌卸现象，不能建立稳定的储脂墙，以致储脂室中的润滑脂与轴承侧面无法实现有效的贴合导通，这样会导致无法向轴承持续供给基础油，从而无法确保轴承的良好润滑。
因此，如何避免由于无法向轴承持续供给基础油而导致无法确保轴承的良好润滑，是本领域技术人员目前需要解决的技术问题。
发明内容
本发明的目的是提供一种用于轴承润滑的密封结构，可以实现向滚动轴承持续供给基础油，从而有效解决高速电机中大轴承润滑不良的问题，有利于延长轴承的使用寿命。
为实现上述目的，本发明提供一种用于轴承润滑的密封结构，包括用以安装轴承的轴承座以及用以防止润滑脂向外飞溅的外挡环，所述轴承座设有至少两个沿周向分布的内储脂室，所述外挡环设有至少两个沿周向分 布的外储脂室，且任意两个相邻所述内储脂室和任意两个相邻所述外储脂室之间均设有筋板，所述轴承座内的所述筋板设有用以供润滑脂进入轴承中的第一贯通槽，所述轴承座还设有注脂口以及与所述注脂口和所述第一贯通槽连通的第一注脂通道。
可选地，还包括设于所述轴承座内、且靠近所述轴承座顶部的实心块。
可选地，所述实心块设有用以供润滑脂进入轴承中的第二贯通槽，所述轴承座还设有与所述注脂口和所述第二贯通槽连通的第二注脂通道。
可选地，所述第一贯通槽与所述第二贯通槽在周向相距180°。
可选地，所述轴承座内的全部所述内储脂室、全部所述筋板以及所述实心块经铣刀一体加工成型。
可选地，还包括设于所述外储脂室的内挡边下部、用以供轴承中的润滑脂排出的弧形排脂口。
可选地，所述弧形排脂口的个数为两个，且两个所述弧形排脂口关于所述外挡环横截面的中轴线对称分布。
可选地，所述外挡环内的全部所述外储脂室、全部所述弧形排脂口和全部所述筋板经铣刀一体加工成型。
可选地，还包括用以固定于轴承外侧的外油封，所述外油封与所述外挡环形成有用以供多余的润滑脂排出的迷宫排脂通道。
可选地，还包括与所述轴承座通过螺栓固接的外轴承盖，所述外轴承盖内设有与所述迷宫排脂通道连通、用以收集由所述迷宫排脂通道排出的废脂的废脂收集腔。
相对于上述背景技术，本发明实施例所提供的用于轴承润滑的密封结构，包括轴承座和外挡环，其中，轴承座用于安装轴承，外挡环用于防止轴承中的润滑脂向外飞溅，轴承座设有至少两个沿周向分布的内储脂室，外挡环设有至少两个沿周向分布的外储脂室，且任意两个相邻内储脂室之间设有筋板，任意两个相邻外储脂室之间也设有筋板；进一步的，轴承座内的筋板设有第一贯通槽，第一贯通槽用于供润滑脂进入轴承中，轴承座还设有注脂口和第一注脂通道，第一注脂通道与注脂口和第一贯通槽连通。本发明实施例所提供的用于轴承润滑的密封结构，一方面，通过在相邻内 储脂室和相邻外储脂室之间设置筋板，这样在轴承运转时可减少润滑脂由于受轴承周向拖动作用而导致不安定的情况，确保轴承两侧的内、外储脂室的润滑墙的稳定建立，从而可以实现润滑脂与轴承侧边紧密贴合导通，为轴承持续供给基础油，进而可以确保轴承良好的润滑；另一方面，由轴承座的注脂口注入的新的润滑脂可通过第一注脂通道并经第一贯通槽直接进入轴承中，从而实现对轴承的良好润滑。上述设置方式可以实现向滚动轴承持续供给基础油，从而有效解决高速电机中大轴承润滑不良的问题，有利于延长轴承的使用寿命，实现轴承少维护，乃至免维护。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。
图1为本发明实施例所提供的用于轴承润滑的密封结构的装配结构示意图；
图2为图1中轴承座的内部结构示意图；
图3为图1中外挡环的内部结构示意图。
其中：
1-转轴、2-外油封、3-外轴承盖、4-外挡环、41-外储脂室、42-弧形排脂口、5-轴承、6-轴承座、61-内储脂室、62-筋板、621-第一贯通槽、63-实心块、631-第二贯通槽、64-注脂口、65-第一注脂通道、66-第二注脂通道、7-内挡圈、8-迷宫排脂通道、9-废脂收集腔。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例， 而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明的核心是提供一种用于轴承润滑的密封结构，可以实现向滚动轴承持续供给基础油，从而有效解决高速电机中大轴承润滑不良的问题，有利于延长轴承的使用寿命。
为了使本技术领域的技术人员更好地理解本发明方案，下面结合附图和具体实施方式对本发明作进一步的详细说明。
需要说明的是，下文所述的“上端、下端、左侧、右侧”等方位词都是基于说明书附图所定义的。
请参考图1、图2和图3，图1为本发明实施例所提供的用于轴承润滑的密封结构的装配结构示意图；图2为图1中轴承座的内部结构示意图；图3为图1中外挡环的内部结构示意图。其中，图1中的箭头方向即为润滑脂的流动方向。
如图1所示，本发明实施例所提供的用于轴承润滑的密封结构，主要设于高速电机中，包括：转轴1、外油封2、外轴承盖3、外挡环4、滚动轴承5、轴承座6和内挡圈7、其中，滚动轴承5的内圈固定在转轴1上，两侧分别通过外油封2及内挡圈7进行轴向定位，轴承座6用于安装轴承5，轴承5外圈安装在轴承座6中，通过螺栓连接外轴承盖3与轴承座6，以压紧外挡环4并使其轴向安装于轴承座6上，从而实现轴承5外圈的轴向定位，外挡环4用于防止轴承5中的润滑脂向外飞溅。
进一步地，轴承座6设有至少两个沿周向分布的内储脂室61，外挡环4设有至少两个沿周向分布的外储脂室41，且任意两个相邻内储脂室61之间设有筋板62，任意两个相邻外储脂室41之间也设有筋板62；相较于现有技术中设置一个沿周向360°分布的环形储脂室，本发明实施例所提供的内储脂室61和外储脂室41均沿周向设置多个，且相邻两个内储脂室61之间和相邻两个外储脂室41之间通过设置筋板62，可以在一定程度上减少润滑脂受到的来自轴承5的周向拖动作用，有利于两侧储脂室的润滑墙的稳定建立，从而同轴承5侧边紧密贴合导通，为轴承5持续供给基础 油，确保轴承5的良好润滑。
为了解决传统轴承5后期在线运行润滑不良的问题，即在轴承座上设置注脂通道，注脂通道同内储脂室相贯通，后期维护补充的新润滑脂主要通过单点注脂通道进入内环形储脂室中，并将储脂室中的旧脂挤入轴承中参与润滑，以致轴承5润滑不良。在本发明实施例中，上述轴承座6内的筋板62设有第一贯通槽621，第一贯通槽621用于供润滑脂进入轴承5中，轴承座6还设有注脂口64和第一注脂通道65，第一注脂通道65与注脂口64和第一贯通槽621连通。可以看出，后期维护补充新润滑脂时，由轴承座6的注脂口64注入的新的润滑脂可通过第一注脂通道65并经第一贯通槽621直接进入轴承5中，从而实现对轴承5的良好润滑。
这样一来，本发明实施例所提供的用于轴承5润滑的密封结构，一方面，通过在相邻内储脂室61和相邻外储脂室41之间设置筋板62，这样在轴承5运转时可减少润滑脂由于受轴承5周向拖动作用而导致不安定的情况，确保轴承5两侧的内、外储脂室的润滑墙的稳定建立，从而可以实现润滑脂与轴承5侧边紧密贴合导通，为轴承5持续供给基础油，进而可以确保轴承5良好的润滑；另一方面，由轴承座6的注脂口64注入的新的润滑脂可通过第一注脂通道65并经第一贯通槽621直接进入轴承5中，从而实现对轴承5的良好润滑。上述设置方式可以实现向滚动轴承5持续供给基础油，从而有效解决高速电机中大轴承5润滑不良的问题，有利于延长轴承5的使用寿命，实现轴承5少维护，乃至免维护。
此外，为了防止原环形储脂室上部的润滑脂在高温下容易出现塌陷的现象，轴承座6内还设有实心块63，实心块63设于轴承座6内靠近顶部的位置，实心块63具体可以设置为弧形实心块63。现有技术中，由于实心块63的位置是为储脂室的一部分，此处的润滑脂在高温下容易发生塌陷以致无法在储脂室中建立稳定的润滑墙，在本发明实施例中，该处采用实心块63的结构填充储脂室，以避免储脂室上部润滑脂高温塌卸，以致塌卸的润滑脂重新进入轴承5中搅拌致使轴承5温升异常。
如图2所示，为了进一步保证轴承5的良好润滑，上述实心块63靠近注脂口64的一侧设有第二贯通槽631，与第一贯通槽621的作用相同，第 二贯通槽631用于供润滑脂进入轴承5中，相应的，轴承座6还设有第二注脂通道66，第二注脂通道66与注脂口64和第二贯通槽631连通。
这样一来，后期维护补充新润滑脂时，由轴承座6的注脂口64注入的新的润滑脂也可通过第二注脂通道66并经第二贯通槽631直接进入轴承5中，从而实现对轴承5的良好润滑。
当然，根据实际需要，上述第二贯通槽631与第一贯通槽621二者可以设置为在周向相隔180°，且第一贯通槽621与第二贯通槽631包括U型、长条形等一切有利于润滑脂进入轴承5的结构。
如此一来，后期维护补充新润滑脂时，由轴承座6的注脂口64注入的新的润滑脂可通过第一注脂通道65和第二注脂通道66并分别经第一贯通槽621和第二贯通槽631直接进入轴承5中，从而实现双向的补脂，有利于对轴承5的良好润滑。当然，根据实际的润滑需要，还可以增设注脂通道以及与之对应的贯通槽的设置，本文对此并不做具体限制。
需要说明的是，上述设于轴承座6内的全部内储脂室61、全部筋板62以及实心块63可以经铣刀一体加工成型，有利于批量化生产，从而提高生产效率。
为了优化上述实施例，还包括设于外储脂室41的内挡边下部的弧形排脂口42，弧形排脂口42用于供轴承5中的润滑脂排出。
具体地说，由于轴承5内的润滑脂会经由外油封2和外挡环4之间的间隙排出，该间隙过大会导致轴承5中的润滑脂排出过量，以致轴承5润滑效果不佳，该间隙过小，不利于轴承5中的润滑脂排出，容易导致轴承5内温度过高，因此，通过设置弧形排脂口42可以有效优化外油封2和外挡环4之间的间隙，从而可以使轴承5中的润滑脂以更有利于轴承5润滑以及防止轴承5内温度过高的前提排出轴承5。
如图3所示，作为优选的，上述弧形排脂口42的个数为两个，且两个弧形排脂口42关于外挡环4横截面的中轴线对称分布。上述设置方式可增强轴承5内润滑脂的排出能力，以解决现有技术中排脂困难的问题，同时又可避免像离心甩油排脂结构一样出现过度排脂，从而确保轴承5温升及润滑有效匹配平衡。
需要说明的是，弧形排脂口42的个数还可以增设至多于两个，本文对弧形排脂口42的个数和尺寸并不作具体限制，前提是以实现温升和润滑匹配最优为设置原则进行配置。
也就是说，上述配置可在确保能够给予轴承5持续润滑脂以使其保持良好润滑的基础上，还能够将轴承5内多余的润滑脂及时排出，从而实现高速电机轴承5润滑与温升达到良好的平衡，从而大大延长轴承5使用寿命，实现轴承5少维护，乃至免维护。
在上述基础上，固定于轴承5外侧的外油封2与外挡环4形成有迷宫排脂通道8，迷宫排脂通道8用于供多余的润滑脂排出。此外，外轴承盖3内设有废脂收集腔9，废脂收集腔9与迷宫排脂通道8连通，废脂收集腔9用于收集由迷宫排脂通道8排出的废脂。通过迷宫排脂通道8排出的废脂可收集在废脂收集腔9，废脂收集腔9满后可通过废脂排出口排至外界。
综上，装置中油路的方向如图1中箭头所示，具体地，后期维护补充新润滑脂时，由轴承座6的注脂口64注入的新的润滑脂可通过第一注脂通道65和第二注脂通道66并分别经第一贯通槽621和第二贯通槽631直接进入轴承5中，润滑后的润滑脂可相继经弧形排脂口42和迷宫排脂通道8进入至废脂收集腔9，而后通过废脂排出口排至外部。
需要说明的是，在本说明书中，诸如第一和第二之类的关系术语仅仅用来将一个实体与另外几个实体区分开来，而不一定要求或者暗示这些实体之间存在任何这种实际的关系或者顺序。
以上对本发明所提供的用于轴承润滑的密封结构进行了详细介绍。本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方案及其核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。

Claims (10)

  1. 一种用于轴承润滑的密封结构，包括用以安装轴承(5)的轴承座(6)以及用以防止润滑脂向外飞溅的外挡环(4)，其特征在于，所述轴承座(6)设有至少两个沿周向分布的内储脂室(61)，所述外挡环(4)设有至少两个沿周向分布的外储脂室(41)，且任意两个相邻所述内储脂室(61)和任意两个相邻所述外储脂室(41)之间均设有筋板(62)，所述轴承座(6)内的所述筋板(62)设有用以供润滑脂进入轴承(5)中的第一贯通槽(621)，所述轴承座(6)还设有注脂口(64)以及与所述注脂口(64)和所述第一贯通槽(621)连通的第一注脂通道(65)。
  2. 如权利要求1所述的用于轴承润滑的密封结构，其特征在于，还包括设于所述轴承座(6)内、且靠近所述轴承座(6)顶部的实心块(63)。
  3. 如权利要求2所述的用于轴承润滑的密封结构，其特征在于，所述实心块(63)设有用以供润滑脂进入轴承(5)中的第二贯通槽(631)，所述轴承座(6)还设有与所述注脂口(64)和所述第二贯通槽(631)连通的第二注脂通道(66)。
  4. 如权利要求3所述的用于轴承润滑的密封结构，其特征在于，所述第一贯通槽(621)与所述第二贯通槽(631)在周向相距180°。
  5. 如权利要求2所述的用于轴承润滑的密封结构，其特征在于，所述轴承座(6)内的全部所述内储脂室(61)、全部所述筋板(62)以及所述实心块(63)经铣刀一体加工成型。
  6. 如权利要求1-5任意一项所述的用于轴承润滑的密封结构，其特征在于，还包括设于所述外储脂室(41)的内挡边下部、用以供轴承(5)中的润滑脂排出的弧形排脂口(42)。
  7. 如权利要求6所述的用于轴承润滑的密封结构，其特征在于，所述弧形排脂口(42)的个数为两个，且两个所述弧形排脂口(42)关于所述外挡环(4)横截面的中轴线对称分布。
  8. 如权利要求7所述的用于轴承润滑的密封结构，其特征在于，所述外挡环(4)内的全部所述外储脂室(41)、全部所述弧形排脂口(42)和全部所述筋板(62)经铣刀一体加工成型。
  9. 如权利要求6所述的用于轴承润滑的密封结构，其特征在于，还包括用以固定于轴承(5)外侧的外油封(2)，所述外油封(2)与所述外挡环(4)形成有用以供多余的润滑脂排出的迷宫排脂通道(8)。
  10. 如权利要求9所述的用于轴承润滑的密封结构，其特征在于，还包括与所述轴承座(6)通过螺栓固接的外轴承盖(3)，所述外轴承盖(3)内设有与所述迷宫排脂通道(8)连通、用以收集由所述迷宫排脂通道(8)排出的废脂的废脂收集腔(9)。
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CN111288152A (zh) * 2018-12-07 2020-06-16 南京高速齿轮制造有限公司 一种轴承润滑装置
CN112460149A (zh) * 2020-12-14 2021-03-09 中车株洲电机有限公司 一种用于轴承润滑的密封结构

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