WO2019100260A1

WO2019100260A1 - High-speed motor oil lubrication structure

Info

Publication number: WO2019100260A1
Application number: PCT/CN2017/112348
Authority: WO
Inventors: 李春辉; 钟跃
Original assignee: 贵州智慧能源科技有限公司
Priority date: 2017-11-22
Filing date: 2017-11-22
Publication date: 2019-05-31

Abstract

A high-speed motor oil lubrication structure, comprising a housing (11), a rotating shaft (30) installed in the housing (11), a first bearing (21) and a second bearing (22) installed at the two ends of the rotating shaft (30), a first end cover (13) arranged at the outer side of the first bearing (21), and a second end cover (14) arranged at the outer side of the second bearing (22). An oil inlet (27) is arranged on the second end cover (14). The oil inlet (27) is in communication with the second bearing (22). An oil supply channel (31) is arranged in the rotating shaft (30). The oil supply channel (31) has a first end (311) and a second end (312) which are opposite to each other. The first end (311) is in communication with the first bearing (21), and the second end (312) is in communication with the oil inlet (27).

Description

\¥0 2019/100260 卩(:17 \2017/112348

High speed motor oil lubrication structure

Technical field

[0001] The present invention relates to the field of oil lubrication, and more particularly to a high speed motor oil lubrication structure.

Background technique

[0002] At present, 30%~60% of energy consumption is overcoming the friction in energy transfer process, 80% of machine parts damage is caused by wear, and in the event of equipment accident, it is caused by poor lubrication. About 70%, therefore, a correct and reasonable lubrication system is especially important, especially for motors. High-speed motor Generally, the speed can reach 20000-1000001·!)!!!, the rotation is unbalanced, and the load changes greatly. High-speed motors generally use steel balls or sliding bearings. Oil lubrication is an indispensable condition. The prior art generally employs a plurality of fuel supply port structures, resulting in a complicated structure. Moreover, high-speed motor operation generates a lot of heat, and how to cool the inside of the motor is also a challenge. There are additional cooling structures in the prior art, but this increases design, manufacturing, and material costs.

technical problem

In view of this, the present invention proposes a high-speed motor oil lubrication structure which simplifies the bearing lubrication structure and also functions to cool the motor.

Problem solution

Technical solution

[0004] The present invention provides a high-speed motor oil lubrication structure including a casing and a rotating shaft installed in the casing, first and second bearings mounted at both ends of the rotating shaft, and a first bearing disposed on the first bearing a first end cover on the outer side and a second end cover disposed on the outer side of the second bearing, the second end cover is provided with an oil inlet, and the oil inlet is connected with the second bearing, the shaft Having an oil supply passage therein, the oil supply passage has opposite first and second ends, the first end is connected to the first bearing, and the second end is connected to the oil inlet, such that Lubricating oil injected through the oil inlet port can pass through the oil supply passage to the first bearing to lubricate the first bearing.

[0005] In an embodiment, the oil lubrication structure includes an oil pan, the oil pan is disposed between the first bearing and the first end cover, and the oil pan is respectively The first bearing and the oil supply passage \¥0 2019/100260 卩 (: 17 \2017/112348 One end is connected to guide lubricating oil from the first end of the oil supply passage to the first bearing for lubrication.

[0006] In an embodiment, the oil slinger has a first cavity and a second cavity that communicate with each other, and the first cavity is in communication with the first end of the oil supply passage, the second The cavity is in communication with the first bearing; the rotating shaft is provided with at least one radial hole at a position corresponding to the first cavity of the first end of the oil supply passage, and one end of the radial hole is The oil supply passage is in communication, and the other end is in communication with the first cavity.

[0007] In an embodiment, the first end cover is sleeved on the rotating shaft, the second bearing is located at an end of the rotating shaft, and the second end of the oil supply passage is an open end. A cavity is formed between the second end cover and the second bearing and the rotating shaft, and the cavity is respectively communicated with the oil inlet, the second end of the oil supply passage and the second bearing.

[0008] In an embodiment, a first fixing member supporting the first bearing and a second fixing member supporting the second bearing are respectively installed at two ends of the casing, and the first end cover is fixedly mounted. To the first fixing member, the second end cover is fixedly mounted to the second fixing member, and the casing, the first fixing member, the second fixing member, the first end cover and the second end cover are formed together A sealed space.

[0009] In an embodiment, a first oil outlet is disposed on the casing to discharge lubricating oil in the high-speed motor, and the first oil outlet is located in the casing corresponding to the first One end of a bearing.

[0010] In an embodiment, a first oil outlet passage is formed between the first bearing and the first oil outlet, so that the lubricating oil that lubricates the first bearing passes through the first An oil outlet passage enters the first oil outlet, and a second oil outlet passage is formed between the second bearing and the first oil outlet to lubricate at least partially lubricate the second bearing The oil is discharged into the first oil outlet through the second oil outlet passage.

[0011] In an embodiment, the second oil outlet passage includes a second oil outlet and a connecting passage, and the second oil outlet is connected to the inner space of the casing and formed in the corresponding casing of the casing. One end of the second bearing, the connecting passage is formed in a wall portion of the casing and communicates with the second oil outlet to the first oil outlet.

[0012] In an embodiment, the second oil outlet extends through a wall portion of the casing, and an end of the second oil outlet located outside the casing wall is sealed so as to enter the The lubricating oil of the second oil outlet can only flow to the first oil outlet via the connecting passage.

[0013] In an embodiment, the second end cap and the second fixing member are provided with air holes for injecting air into the sealed space. \¥0 2019/100260 卩(:17 \2017/112348

[0014]

Advantageous effects of the invention

Beneficial effect

[0015] In summary, the present invention provides a high-speed motor oil lubrication structure, which simplifies the lubrication structure of a high-speed motor bearing. The hollow structure of the rotor can be used to supply oil and oil, and the lubricating oil can be supplied from one end before and after lubrication. The bearing, the oil can absorb heat through the center of the rotor, and also acts as a cooling motor, and the hollow structure reduces the moment of inertia of the rotor and improves the stability of the motor.

Brief description of the drawing

DRAWINGS

1 is a schematic view of a motor oil lubrication structure.

Invention embodiment

Embodiments of the invention

[0017] Before the embodiments are described in detail, it is understood that the invention is not limited to The invention may be embodied in other ways. Further, it should be understood that the phraseology and terminology used herein are for the purpose of description The words "including", "comprising", "having", and the like, as used herein, are meant to include the items listed thereafter, their equivalents, and other additional items. In particular, when describing "a certain element", the present invention does not limit the number of the elements to one, and may include a plurality.

As shown in FIG. 1, the high speed motor oil lubricating structure includes a casing 11, a first end cover 13, a second end cover 14, a first fixing member 15, and a second fixing member 16. The first fixing member 15 and the second fixing member 16 are respectively fixed at the two ends of the casing 11, the first end cover 13 is fixed on the outer end surface of the first fixing member 15, and the second end cover 14 is fixed on the outer end surface of the second fixing member 16. The casing 11, the first end cover 13, the second end cover 14, the first fixing member 15, and the second fixing member 16 together form a sealed space. The rotor and the stator of the motor are disposed in the closed space

[0019] The stator includes stator windings 18 that are fixed to the inner wall of the housing 11. The rotor includes a rotating shaft 30 and a permanent magnet 17 fixed to the rotating shaft 30, and thus, the permanent magnet 17 rotates together with the rotating shaft 30. Wherein, the permanent magnet 17 is opposite to the stator winding 18, and an air gap is formed therebetween to allow relative rotation of the two. \¥0 2019/100260 卩(:17 \2017/112348

[0020] Both ends of the rotating shaft 30 are rotatably supported by the first bearing 21 and the second bearing 22, respectively. The first bearing 21 is positioned by the first fixing member 15 and axially corresponds to the first end cover 13. The second bearing 22 is corresponding to the second fixing member 16 and corresponds to the second end cover 14 in the axial direction. In the present embodiment, the first bearing 21 and the second bearing 22 are ball bearings, which is only a preferred embodiment of the embodiment. In other embodiments, the first bearing 21 and the second bearing 22 may also be other Types of bearings, such as plain bearings, are not limited to the specific type of bearing, as long as stable rotation support can be provided to the rotating shaft 30.

[0021] In the embodiment, the rotating shaft 30 is a hollow shaft having an oil supply passage 31 therein. The oil supply passage 31 has opposite first ends 311 and second ends 312, and the first end 311 is provided with a shaft hole 32. The first end 311 is in communication with the first bearing 21 through the shaft hole 32, the second end 312 is an open end, and a cavity 25 is formed between the second end cover 14 and the second bearing 22 and the rotating shaft 30, and the second end cover 14 is formed. An oil inlet port 27 is provided, and the oil inlet port 27 is communicated with the second bearing 22 and the second end 312 by the cavity 25, so that the lubricating oil is directly injected into the cavity 25 through the oil inlet port 27 to first lubricate the second bearing 22, The lubricating oil enters the second end 312 from the cavity 25 at the same time, passes through the oil supply passage 31 in the rotating shaft 30 to reach the first end 311, enters the first bearing through the shaft hole 32 to lubricate the first bearing 21, and the lubricating oil passes through the oil supply. When the channel 31 is used, the heat in the rotor of the motor can also be taken away to provide a cooling effect. In addition, the hollow shaft can also reduce the moment of inertia of the shaft and improve the stability of rotation.

[0022] More specifically, the oil lubrication structure includes an oil pan 33 disposed between the first bearing 21 and the first end cover 13, the oil pan 33 having a first cavity 331 and a second space communicating with each other The cavity 332, the shaft hole 32 is disposed at a position corresponding to the first cavity 331 of the first end 311, the shaft hole 32 extends through the shaft wall of the rotating shaft 30 in the radial direction of the rotating shaft 30, and the first cavity 331 passes through the shaft hole 32 and supplies oil. The first end 311 of the passage 31 is in communication, and the second cavity 332 is in communication with the first bearing 21. When the motor is running, the lubricating oil is thrown out to the first cavity 331 of the oil pan 33 due to the high speed rotation of the rotating shaft 30. Since the first cavity 331 is in communication with the second cavity 332, the lubricating oil is delivered to the second cavity 332, thereby lubricating the first bearing 21.

[0023] In the embodiment, the casing 11 is provided with a first oil outlet 41 for discharging lubricating oil, and the first oil outlet 41 is located at one end of the casing 11 near the first bearing 21, and is connected to the casing. The sealed space in 11 is connected. More specifically, the first oil outlet 41 is disposed on the bottom side of the casing 11 so that the lubricating oil lubricates the first bearing 21 and is discharged by the first oil outlet 41 under the action of gravity, and carries away heat.

[0024] A first oil outlet passage 45 is formed between the first bearing 31 and the first oil outlet 41, so that the lubricating oil on the first bearing 21 enters the first oil outlet 41 through the first oil outlet passage 45. . Part of the first oil passage 45 \¥0 2019/100260 卩 (: 17 \2017/112348 is disposed in the first fixing member 15, that is, the first fixing member 15 is provided with one or more flow path portions 49 as a portion of the first oil discharge passage 45. A second oil outlet passage 46 is formed between the second bearing 22 and the first oil outlet 41, so that at least a portion of the lubricating oil lubricating the second bearing 22 can enter the first oil outlet through the second oil outlet passage 46. The mouth 41 is discharged.

In the present embodiment, the second oil discharge passage 46 includes a second oil discharge port 42 and a connecting passage 48. The second oil outlet 42 is located at one end of the casing 11 near the second bearing 22, and communicates with the sealed space in the casing 11. The connecting passage 48 is formed in the wall portion of the casing 11 and communicates with the second oil outlet 42 to the first oil outlet 41. A portion of the second oil outlet passage 46 may also be disposed in the second fixing member 16, that is, the second fixing One or more flow path portions 47 as a part of the second oil discharge passage 46 are provided in the piece 16. After lubricating the first bearing 21, the lubricating oil can be discharged through the first oil outlet passage 45 into the first oil outlet 41. After lubricating the second bearing 22, the lubricating oil can be discharged through the second oil outlet 42 and the connecting passage 48 into the first oil outlet 41.

In the illustrated embodiment, the second oil outlet 42 penetrates the wall portion of the casing 11 in the radial direction, and the connecting passage 48 extends in the axial direction of the wall portion of the casing 11 and communicates with the second oil outlet 42 to The first oil outlet 41. In use, the end 43 of the second oil outlet 42 located outside the wall of the casing 11 can be sealed (for example, by a plug) so that the lubricating oil entering the second oil outlet 42 can only pass through the connecting passage 48. The flow to the first oil outlet 41 is discharged from the first oil outlet 41. When the motor is running, the stator coil 18 generates a large amount of heat to be transmitted to the casing 11, and the lubricating oil flows inside the casing 11, and the heat of the casing 11 can also be taken away, thereby dissipating the stator coil 18.

[0027] In other embodiments, the end 43 of the second oil outlet 42 located outside the wall of the casing 11 may not be sealed. Thus, the lubricating oil entering the second oil outlet 42 can be discharged through the second oil outlet 42 without flowing to the first oil outlet 42 or only partially to the first oil outlet 42. However, the advantage of sealing the second oil outlet 42 is that after sealing, there is only one oil inlet and one oil outlet, and the lubricating oil can only pass through two paths (oil supply passage / first oil outlet passage, and The second oil outlet passage reaches the only oil outlet, and the lubricating oil of the motor at the end of the second bearing 22 cannot be immediately discharged from the second oil outlet 42 whose outer end is sealed, but must be connected via a relatively narrow connection. The passage 48 travels to the first oil outlet 41, which on the one hand advantageously takes away the heat of the stator coil, while the elongated travel path also increases its travel resistance, thus the amount of lubricating oil reaching the first bearing 21 via the hollow shaft. It will increase to a certain extent (one path increases resistance, and the other path will decrease relatively, so more lubricant will lower resistance) \¥0 2019/100260 卩 (: the path of 17 \2017/112348).

In the embodiment, the second end cover 14 is further provided with air holes, and the air can enter the sealed space through the air holes, so that the air is generated in the sealed space and the outside, and the heat in the sealed space is taken out.

[0029] In summary, the present invention provides a high-speed motor oil lubrication structure, simplified structure, the lubricating oil is transported through the hollow shaft, only one inlet port can be used to lubricate the front and rear bearings, and the internal temperature of the motor can be cooled and reduced. The moment of inertia of the small rotor improves stability and achieves higher running accuracy.

[0030] The concepts described herein may be embodied in other forms without departing from the spirit and scope of the invention. The specific embodiments disclosed are to be considered as illustrative and not restrictive. Therefore, the scope of the invention is to be determined by the appended claims rather Any changes which come within the meaning and range of the claims are intended to be within the scope of the claims.

Claims

\¥0 2019/100260 卩(:17 \2017/112348 Claims

[Claim 1] A high-speed motor oil lubricating structure comprising a casing and a rotating shaft installed in the casing, first and second bearings mounted at both ends of the rotating shaft, and disposed outside the first bearing a first end cover and a second end cover disposed outside the second bearing, the second end cover is provided with an oil inlet, and the oil inlet is in communication with the second bearing, wherein The oil shaft has an oil supply passage, the oil supply passage has opposite first ends and second ends, the first end is connected to the first bearing, the second end is connected to the oil inlet Connected such that lubricating oil injected through the oil inlet can reach the first bearing through the oil supply passage to lubricate the first bearing.

[Claim 2] The high-speed motor oil lubrication structure according to claim 1, wherein the oil lubrication structure includes an oil pan, the oil pan is disposed at the first bearing and the first Between the end caps, the oil pan communicates with the first bearing and the first end of the oil supply passage to guide lubricating oil from the first end of the oil supply passage to the first bearing lubricating.

[Claim 3] The high-speed motor oil lubricating structure according to claim 2, wherein the oil pan has a first cavity and a second cavity that communicate with each other, the first cavity and the first cavity a first end of the oil supply passage is in communication, the second cavity is in communication with the first bearing; the rotating shaft is provided with at least one diameter at a position corresponding to the first cavity of the first end of the oil supply passage To the hole, one end of the radial hole is in communication with the oil supply passage, and the other end is in communication with the first cavity.

[Claim 4] The high-speed motor oil lubrication structure according to claim 1, wherein the first end cover is sleeved on the rotating shaft, and the second bearing is located at an end of the rotating shaft. The second end of the oil supply passage is an open end, and a cavity is formed between the second end cover and the second bearing and the rotating shaft, and the cavity is respectively connected to the oil inlet and the oil supply passage The second end and the second bearing are in communication.

[Claim 5] The high-speed motor oil lubrication structure according to claim 1, wherein the two ends of the casing are respectively mounted with a first fixing member for supporting the first bearing and a second bearing for supporting the second bearing a second fixing member, the first end cover is fixedly mounted to the first fixing member, the second end cover is fixedly mounted to the second fixing member, the casing, the first fixing member, and the second fixing The first end cover and the second end cover together form a sealed space. \¥0 2019/100260 卩(:17 \2017/112348

The high-speed motor oil lubrication structure according to any one of claims 1 to 5, wherein the casing is provided with a first oil outlet for lubricating the lubricating oil in the high-speed motor. Discharge, the first oil outlet is located at one end of the casing corresponding to the first bearing.

[Claim 7] The high-speed motor oil lubrication structure according to claim 6, wherein a first oil outlet passage is formed between the first bearing and the first oil outlet, so that the The lubricating oil lubricated by the first bearing is discharged into the first oil outlet through the first oil outlet passage, and a second oil outlet passage is formed between the second bearing and the first oil outlet, The lubricating oil that at least partially lubricates the second bearing is caused to enter the first oil outlet through the second oil outlet passage.

[Claim 8] The high-speed motor oil lubrication structure according to claim 7, wherein the second oil outlet passage includes a second oil outlet and a connecting passage, and the second oil outlet and the machine The inner space of the shell communicates with and is formed at one end of the casing corresponding to the second bearing, and the connecting passage is formed in a wall portion of the casing and communicates with the second oil outlet to the first oil outlet .

[Claim 9] The high-speed motor oil lubricating structure according to claim 8, wherein the second oil outlet penetrates a wall portion of the casing, and the second oil outlet is located at the machine One end of the outer side of the casing wall is sealed such that the lubricating oil entering the second oil outlet can only flow to the first oil outlet via the connecting passage.

[Claim 10] The high-speed motor oil lubricating structure according to claim 5, wherein the second end cover and the second fixing member are provided with air holes for injecting air into the sealed space.