Sliding bearing device and motor
By setting up an expanded oil storage box and a variable diameter joint in the oil storage ventilation screw pipe device, the problem of oil leakage due to oil mist in the sliding bearing device is solved, effective condensation and reflux of the oil is achieved, and the lubrication effect of the motor is improved.
Patent Information
- Application Number
- CN202422637379.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-30
AI Technical Summary
In the prior art, the sliding bearing device forms a micro positive pressure due to the oil mist during the motor operation, causing the oil mist to enter the oil storage ventilation screw pipe device and leak oil from the outside of the motor, which cannot effectively solve the oil leakage phenomenon of the sliding bearing.
An expanded oil storage box is arranged in the oil storage ventilation screw pipe device, which is connected to the inside of the bearing seat through a variable diameter joint, and is connected to the outside air through the breathing cap to form a larger condensation space. The inner diameter of the oil storage box is greater than the inner diameter of the oil pipe, and oil mist is collected by centrifugal force and condensation space to avoid oil mist overflowing.
It effectively reduces the oil loss of the sliding bearing device, improves the oil leakage phenomenon of the sliding bearing, and achieves effective return of the oil through negative pressure compensation and oil mist condensation and accumulation, and prevents oil loss.
Smart Images
Figure CN223136732U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, and further relates to a sliding bearing device and a motor. Background Art
[0002] For high-speed and symmetric air passage sliding bearing device motors, forced lubrication is usually adopted to meet the heat dissipation of the motor itself and the safe and stable operation of the equipment. When the motor is running, lubricating oil with a certain pressure enters the bearing through the oil inlet pipe. The oil is atomized and heated under the impact of the high-speed rotating shaft, and a slightly positive pressure is formed by the oil mist in the bearing housing.
[0003] In the air passage of the motor, air circulates rapidly under the action of the fan inside the rotor. The inner covers of both ends of the bearing are near the negative pressure area of the fan air inlet. Under the combined action of the positive pressure in the bearing housing and the negative pressure at the inner cover of the bearing, the oil mist in the bearing housing flows from the high-pressure area (bearing housing) to the low-pressure area (motor inner cavity). The oil mist flows in the motor inner cavity along with the circulating air flow and adheres to the inner wall of the machine base and the surface of the coil, accumulates to form oil droplets and accumulates at the bottom of the machine base, etc., resulting in oil leakage from the bearing device into the motor.
[0004] For the sliding bearing device in the area outside the motor, an oil storage and ventilation solenoid tube device is usually adopted to balance the air pressure inside and outside the sliding bearing. For a motor with a sliding bearing, when the motor is running, the oil is atomized and heated under the impact of the high-speed rotating shaft, so that a slightly positive pressure is formed by the oil mist in the bearing housing. Under the action of the pressure difference, the oil mist enters the oil storage and ventilation solenoid tube. The oil mist condenses and accumulates in the oil storage and ventilation solenoid tube device, resulting in oil leakage from the bearing device to the outside of the motor through the oil pipe.
[0005] Air circulates rapidly under the action of the fan inside the rotor. The inner covers of both ends of the bearing are near the negative pressure area of the fan air inlet. Under the combined action of the positive pressure in the bearing housing and the negative pressure at the inner cover of the bearing, the oil mist in the bearing housing flows from the high-pressure area (bearing housing) to the low-pressure area (motor inner cavity). The oil mist flows in the motor inner cavity along with the circulating air flow and adheres to the inner wall of the machine base and the surface of the coil, accumulates to form oil droplets and accumulates at the bottom of the machine base, etc., resulting in oil leakage from the bearing device into the motor.
[0006] For those skilled in the art, how to improve the oil leakage phenomenon of the sliding bearing is a technical problem that needs to be solved at present. Summary of the Utility Model
[0007] The core of the utility model is to provide a sliding bearing device. The oil storage and ventilation solenoid tube is communicated with the inside of the bearing seat. An enlarged oil storage box is arranged on the oil storage and ventilation solenoid tube. The oil storage box forms a larger condensation space, providing more condensation space for the oil mist, which can avoid the oil loss caused by the volatilization of the oil mist. The specific scheme is as follows:
[0008] A sliding bearing device, comprising a bearing housing, a bearing bush, and an oil storage and ventilation screw pipe. The bearing bush is fixed to the bearing housing, and a rotating shaft is to be assembled inside the bearing bush. The rotating shaft can slide relative to the bearing bush to achieve rotation.
[0009] The oil storage and ventilation screw pipe includes a reducing joint, an oil pipe, an oil storage box, and a breather cap. The oil storage box is communicated with the oil pipe, and the inner diameter of the oil storage box is larger than that of the oil pipe.
[0010] The oil storage and ventilation screw pipe is installed on the bearing housing through the reducing joint and is communicated with an oil collecting cavity arranged inside the bearing housing. The oil storage and ventilation screw pipe is in gas communication with the outside through the breather cap.
[0011] Optionally, the oil pipe includes a lower oil pipe and an upper oil pipe, and the oil storage box is communicatively arranged between the lower oil pipe and the upper oil pipe.
[0012] Optionally, the lower oil pipe and the upper oil pipe are arranged in a staggered manner.
[0013] Optionally, the upper end of the lower oil pipe extends into the interior of the oil storage box, and an oil return notch is arranged at the upper end of the lower oil pipe.
[0014] Optionally, the top end of the lower oil pipe and the oil storage box, and the bottom end of the upper oil pipe and the oil storage box are respectively fixedly connected by threads; a gasket is arranged between the lower oil pipe and the oil storage box and between the upper oil pipe and the oil storage box.
[0015] The bottom end of the lower oil pipe is fixedly connected to the reducing joint by threads.
[0016] The top end of the upper oil pipe is fixedly connected to the breather cap by threads.
[0017] Optionally, the lower oil pipe and / or the upper oil pipe is a bent pipe.
[0018] Optionally, the cross-sectional area of the oil storage box is at least three times that of the oil pipe.
[0019] Optionally, two of the oil storage and ventilation screw pipes are installed on the bearing housing, and two oil collecting cavities are arranged inside the bearing housing. Each oil storage and ventilation screw pipe is communicated with one of the oil collecting cavities; the two oil storage and ventilation screw pipes are respectively arranged on the inner side and the outer side of the machine.
[0020] Optionally, the two oil storage and ventilation screw pipes installed on the bearing housing have the same structure and size.
[0021] The present utility model further provides a motor, comprising the sliding bearing device according to any one of the above.
[0022] The utility model provides a sliding bearing device. The bearing bush is fixed to the bearing housing, and a rotating shaft is assembled inside the bearing bush. The rotating shaft can rotate in a sliding fit relative to the bearing bush, and an oil film is formed between the rotating shaft and the bearing bush during rotation to play a role in isolation and lubrication. The oil storage box is communicated with the oil pipe, and the inner diameter of the oil storage box is larger than that of the oil pipe. The oil storage box is equivalent to a part with an enlarged inner diameter formed on the oil pipe. The oil storage and ventilation screw pipe is installed on the bearing housing through a reducing joint, and the inside of the oil storage and ventilation screw pipe is communicated with an oil collecting cavity arranged inside the bearing housing. The oil storage and ventilation screw pipe is kept in gas communication with the outside through a breathing cap. When the rotating shaft rotates, a centrifugal force is generated on the oil liquid, and the oil liquid is heated to form an oil mist. The oil mist flows in the inner cavity of the motor bearing housing along with the circulating air flow and adheres to the walls of the oil pipe and the oil storage box. A larger condensation space is formed inside the oil storage box, so that the oil mist condenses and accumulates therein and then flows back into the bearing housing again. More oil mist can be temporarily accommodated inside the oil storage box, which can avoid the loss of oil liquid caused by the overflow of excessive oil mist and improve the oil leakage phenomenon of the sliding bearing. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0024] Figure 1 It is a schematic cross-sectional view of the assembly of the sliding bearing device of the present utility model and the motor;
[0025] Figure 2 It is a schematic cross-sectional view of the first embodiment of the oil storage and ventilation screw pipe;
[0026] Figure 3 It is a schematic cross-sectional view of the second embodiment of the oil storage and ventilation screw pipe;
[0027] Figure 4 It is a schematic cross-sectional view of the third embodiment of the oil storage and ventilation screw pipe.
[0028] The figures include:
[0029] Bearing housing 1, oil collecting cavity 11, bearing bush 2, oil storage and ventilation screw pipe 3, reducing joint 31, oil pipe 32, lower oil pipe 321, oil return groove opening 3211, upper oil pipe 322, oil storage box 33, breathing cap 34, rotating shaft 4, shoulder 41, fan 42. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0030] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the sliding bearing device and the motor of the present utility model will be introduced and described in detail below in combination with the drawings and specific embodiments.
[0031] Combined with Figure 1 As shown, the present utility model provides a sliding bearing device, which includes a bearing housing 1, a bearing bush 2, an oil storage and ventilation screw pipe 3 and other structures. The bearing housing 1 plays a role of fixed support. The bearing bush 2 is fixed to the bearing housing 1. The bearing bush 2 is located on the inner wall of the bearing housing 1. The bearing bush 2 and the bearing housing 1 are fixed as a whole. During use, the bearing bush 2 and the bearing housing 1 remain fixed. The bearing housing 1 and the bearing bush 2 together form a bearing box. The bearing bush 2 is used to assemble a rotating shaft 4. The rotating shaft 4 can slide relative to the bearing bush 2 to achieve rotation. The rotating shaft 4 rotates relative to the bearing bush 2, but there is no axial relative displacement between the two. There is lubricating oil in the gap between the rotating shaft 4 and the bearing bush 2. When the rotating shaft 4 rotates relative to the bearing bush 2, an oil film is formed in the gap between the rotating shaft 4 and the bearing bush 2. The oil film plays a lubricating role, and the oil film supports the rotating shaft 4 to avoid direct hard friction between the rotating shaft 4 and the bearing bush 2.
[0032] The oil storage and ventilation screw pipe 3 is used to make the inside of the bearing housing 1 communicate with the outside air, so that the internal air pressure of the bearing housing 1 can be balanced with the external atmospheric pressure of the bearing housing 1. The oil storage and ventilation screw pipe 3 includes a reducing joint 31, an oil pipe 32, an oil storage box 33, and a breather cap 34. The oil storage box 33 is connected to the oil pipe 32, and the inner cavity of the oil storage box 33 communicates with the inner cavity of the oil pipe 32. The inner diameter of the oil storage box 33 is larger than the inner diameter of the oil pipe 32, that is, the oil storage box 33 forms an enlarged area relative to the oil pipe 32. The internal volume of the oil storage box 33 is larger than the volume of the oil pipe 32. The oil storage box 33 has more accommodation space relative to the oil pipe 32.
[0033] The reducing joint 31 is arranged at the lowest part of the oil storage and ventilation screw pipe 3. The oil storage and ventilation screw pipe 3 is installed on the bearing housing 1 through the reducing joint 31 therein, so that the inner cavity of the oil storage and ventilation screw pipe 3 communicates with an oil collecting cavity 11 arranged inside the bearing housing 1. The breather cap 34 is arranged at the highest part of the oil storage and ventilation screw pipe 3. The oil storage and ventilation screw pipe 3 is in gas communication with the outside through the breather cap 34. The oil storage and ventilation screw pipe 3 is arranged in a vertical direction. The reducing joint 31 at the bottom of the oil storage and ventilation screw pipe 3 is connected to the upper part of the bearing housing 1, so as to prevent oil from entering the oil storage and ventilation screw pipe 3 due to gravity. A breather cap 34 is installed on the centrifugal pump bearing box to keep the normal pressure inside the bearing box, prevent oil leakage caused by the pressure difference between the inside and outside of the bearing box, and prevent dust from entering the bearing box.
[0034] Combined with Figure 1As shown, two shoulders 41 are provided on the rotating shaft 4. The shoulders 41 protrude circumferentially from the outer surface of the rotating shaft 4. The bearing bush 2 is axially arranged between the two shoulders 41. When the sliding bearing works, oil is supplied from the middle area of the bearing bush 2, and the oil will flow towards both ends of the bearing bush 2. The shoulders 41 can block the oil flowing axially. Each shoulder 41 corresponds to an oil collecting cavity 11. When the oil is blocked by the shoulder 41, the oil will be thrown into the oil collecting cavity 11 under the action of the centrifugal force generated when the rotating shaft 4 rotates. During the continuous rotation of the rotating shaft 4, the oil will be heated and its temperature will rise. The heated oil will form an oil mist. The oil mist flows in the inner cavity of the motor bearing housing along with the circulating air flow and adheres to the inner walls of the oil pipe 32 and the oil storage box 33. Relative to the oil pipe 32, a larger condensation space is formed inside the oil storage box 33, so that the oil mist condenses and accumulates therein and then flows back into the bearing housing 1. More oil mist can be temporarily accommodated in the oil storage box 33. Therefore, the oil mist has sufficient space and time for cooling, which can avoid the loss of oil caused by the overflow of excessive oil mist and improve the oil leakage phenomenon of the sliding bearing.
[0035] The present utility model hereby provides a specific setting manner of the oil pipe 32. In combination with Figure 2 , the oil pipe 32 includes a lower oil pipe 321 and an upper oil pipe 322. The lower oil pipe 321 and the upper oil pipe 322 are two independent pipes. The oil storage box 33 is communicatively arranged between the lower oil pipe 321 and the upper oil pipe 322. The lower oil pipe 321 is located below the oil storage box 33, and the upper end of the lower oil pipe 321 communicates with the inner cavity of the oil storage box 33. The upper oil pipe 322 is located above the oil storage box 33, and the lower end of the upper oil pipe 322 communicates with the inner cavity of the oil storage box 33. The upper end of the upper oil pipe 322 is connected to the breather cap 34. The oil mist flowing out of the bearing housing 1 first flows upward through the lower oil pipe 321 and enters the oil storage box 33, and then flows upward from the oil storage box 33 and enters the upper oil pipe 322. The diameter of the oil storage box 33 is larger than the diameters of the lower oil pipe 321 and the upper oil pipe 322. The oil storage box 33 can be used for storing the condensed oil. When there is too much oil stored, the lubricating oil flows back into the bearing housing 1 along the lower oil pipe 321. The upper part of the oil storage box 33 is also connected to a section of the upper oil pipe 322, so that there is a certain distance between the breather cap 34 and the oil storage box 33, which can avoid the influence of the condensed oil on the breather cap 34.
[0036] The above-mentioned oil pipe 32 being divided into a two-section structure is only a specific form. The oil pipe 32 can also be provided with only one section. A reducing joint 31 is provided at the lower end of the oil pipe 32, and an oil storage box 33 is provided at the upper end of the oil pipe 32. The breather cap 34 is directly installed on the upper part of the oil storage box 33. Such a structural form should also be included in the protection scope of the present utility model.
[0037] The present utility model hereby provides a relative position relationship between the lower oil pipe 321 and the upper oil pipe 322. In combination with Figure 3As shown, the lower oil pipe 321 and the upper oil pipe 322 are arranged in a staggered manner, that is, the axis of the lower oil pipe 321 and the axis of the upper oil pipe 322 are misaligned with each other, and the lower oil pipe 321 is not directly opposite the upper oil pipe 322. The oil mist flowing upward from the lower oil pipe 321 into the oil storage box 33 will not directly enter the upper oil pipe 322. Instead, the oil mist will first impact the upper surface of the oil storage box 33, causing more oil mist to condense inside the oil storage box 33 and reducing the amount of oil mist entering the upper oil pipe 322.
[0038] Of course, the present utility model does not exclude the arrangement form in which the axes of the lower oil pipe 321 and the upper oil pipe 322 are opposite to each other, such as Figure 2 As shown, the axes of the lower oil pipe 321 and the upper oil pipe 322 are collinear.
[0039] Combined with Figure 2 、 Figure 3 、 Figure 4 As shown, the upper end of the lower oil pipe 321 extends into the interior of the oil storage box 33 for a certain distance, and the upper end of the lower oil pipe 321 is higher than the bottom surface of the oil storage box 33. In order to facilitate the smooth outflow of the oil liquid, an oil return notch 3211 is provided at the upper end of the lower oil pipe 321. The oil return notch 3211 is a notch structure provided on the side wall of the lower oil pipe 321, with at least one, and it can also be two or more. After the lower oil pipe 321 and the oil storage box 33 are assembled, the lower edge of the oil return notch 3211 structure is flush with the lower surface of the inner cavity of the oil storage box 33, so that the oil liquid can enter the lower oil pipe 321 from the oil return notch 3211 and flow along the lower oil pipe 321.
[0040] In order to better make the oil liquid converge and flow towards the lower oil pipe 321, the lower surface of the oil storage box 33 can be shaped like a funnel, and the connection position of the lower oil pipe 321 is the lowest point, so that the oil liquid converged in the oil storage box 33 can flow towards the lower oil pipe 321 more quickly.
[0041] In some embodiments, the top end of the lower oil pipe 321 and the oil storage box 33, and the bottom end of the upper oil pipe 322 and the oil storage box 33 are respectively fixedly connected by threads. External threads are respectively provided at the top end of the lower oil pipe 321 and the bottom end of the upper oil pipe 322, and threaded holes are respectively provided on the upper surface and the lower surface of the oil storage box 33. The lower oil pipe 321, the oil storage box 33, and the upper oil pipe 322 are detachably connected by means of threaded connection, which is convenient for assembly and combination. In order to ensure the sealing effect, sealing gaskets are provided between the lower oil pipe 321 and the oil storage box 33, and between the upper oil pipe 322 and the oil storage box 33. When the lower oil pipe 321 is connected to the oil storage box 33, the sealing gasket is crimped to avoid oil leakage at the connection between the lower oil pipe 321 and the oil storage box 33.
[0042] The bottom end of the lower oil pipe 321 is fixedly connected to the reducing joint 31 by threads. An external thread is provided at the bottom end of the lower oil pipe 321, and an internal thread is provided on the reducing joint 31. The top end of the upper oil pipe 322 is fixedly connected to the breather cap 34 by threads. An external thread is provided at the top end of the upper oil pipe 322, and an internal thread is provided on the breather cap 34.
[0043] The present utility model provides a specific setting form of the oil pipe here. The lower oil pipe 321 and / or the upper oil pipe 322 is a bent pipe. As shown in combination with Figure 4 wherein both the lower oil pipe 321 and the upper oil pipe 322 shown adopt the structure of bent pipes, and the lower oil pipe 321 and the upper oil pipe 322 extend in a wavy shape. Compared with the linear extension, under the same height condition, the flow path of the oil mist can be extended, and the oil mist can impact more on the side walls of the wavy pipes, and more condensation occurs during the process of the oil mist flowing along the pipes.
[0044] To ensure the volume in the oil storage box 33, the cross-sectional area of the oil storage box 33 is at least three times that of the oil pipe 32. The oil storage box 33 can be a cylindrical structure or a cuboid structure, and the height of the oil storage box 33 should be greater than or equal to the width of the oil storage box 33.
[0045] Based on any of the above technical solutions and their combinations, two oil storage and ventilation solenoid pipes 3 are installed on the bearing seat 1 of the present utility model. Two oil collecting cavities 11 are arranged inside the bearing seat 1, and each oil storage and ventilation solenoid pipe 3 is communicated with an oil collecting cavity 11; the two oil storage and ventilation solenoid pipes 3 are respectively arranged on the inner side and the outer side of the machine. As shown in combination with Figure 1 wherein the left oil storage and ventilation solenoid pipe 3 is located outside the motor housing, and the right oil storage and ventilation solenoid pipe 3 is located inside the motor housing.
[0046] One or two oil storage and ventilation solenoid pipes 3 can be arranged on the sliding bearing. When one oil storage and ventilation solenoid pipe 3 is arranged, it can be arranged inside or outside the motor housing. When two oil storage and ventilation solenoid pipes 3 are arranged, one is respectively arranged inside and outside the motor housing, and the oil leakage treatment effect is good.
[0047] When two oil storage and ventilation solenoid pipes 3 are arranged, the structures and dimensions of the two oil storage and ventilation solenoid pipes 3 installed on the bearing seat 1 are the same, and the two oil storage and ventilation solenoid pipes 3 inside and outside the motor housing can be interchanged, which has universality and there is no need to separately prepare different oil storage and ventilation solenoid pipes 3.
[0048] When the rotating shaft 4 rotates, it drives the fan 42 inside the motor housing to rotate synchronously. The air circulates rapidly under the action of the fan 42 inside the rotor. One sliding bearing is respectively arranged at both ends of the rotating shaft 4 ( Figure 1(only one sliding bearing is shown), the inner covers of the bearings at both ends (the end covers close to the motor housing) are near the negative pressure area of the air inlet of the fan 42. Under the combined action of the positive pressure in the bearing housing and the negative pressure at the inner bearing covers, the oil mist in the bearing housing flows from the high-pressure area (bearing housing) into the low-pressure area (motor inner cavity). The oil mist flows with the circulating air flow in the motor inner cavity and adheres to the inner wall of the machine base and the surface of the coil, accumulates to form oil droplets and gathers at the bottom of the machine base, etc., resulting in oil leakage from the bearing device into the motor; a oil storage and ventilation screw pipe 3 is added above the inner bearing cover. Due to the relatively high temperature inside the motor, the inside of the oil storage box 33 of the oil storage and ventilation screw pipe 3 is in a slightly positive pressure state. When the air pressure inside the bearing is lower than the air pressure in the oil storage box 33, the gas inside the oil storage box 33 is sucked into the bearing to balance the internal air pressure, making the air pressure inside and outside the bearing chamber basically the same. This process is similar to the breathing process, and negative pressure compensation is performed on the internal air pressure of the bearing device.
[0049] There are some differences in the functions played by the two oil storage and ventilation screw pipes 3 located outside and inside the motor housing. The oil storage and ventilation screw pipe 3 located inside the motor housing is mainly used to balance the air pressure, and the oil storage and ventilation screw pipe 3 located outside the motor housing is mainly used for oil mist cooling and convergence.
[0050] When the oil storage and ventilation screw pipe 3 is installed inside the motor ( Figure 1 the right oil storage and ventilation screw pipe 3 in [description]), due to the relatively high temperature inside the motor, the inside of the oil storage box 33 of the oil storage and ventilation screw pipe 3 device is in a slightly positive pressure state. When the air pressure inside the bearing is lower than the air pressure in the oil storage box 33, the gas inside the oil storage box 33 is sucked into the bearing to balance the internal air pressure. There is a certain amount of air inside the oil storage box 33. When the inside of the sliding bearing needs to be replenished with gas, the gas inside the oil storage box 33 can be directly sent into the sliding bearing, and the reaction adjustment is more rapid, which can avoid the problem of poor air pressure balance between the inside and outside of the sliding bearing caused by the too long gas flow stroke due to the too long length of the oil pipe.
[0051] When the oil storage and ventilation screw pipe 3 is installed outside the motor ( Figure 1 the left oil storage and ventilation screw pipe 3 in [description]), the oil mist flows with the circulating air flow in the inner cavity of the motor bearing housing and adheres to the lower oil pipe 321 and the wall of the oil storage box 33 to condense and gather, and then flows into the oil storage box 33. An oil return groove opening 3211 is provided at the threaded part of the lower oil pipe 321. When the oil level in the oil storage box 33 is higher than the oil return groove opening 3211, the lubricating oil will flow back into the bearing device along the lower oil pipe 321.
[0052] The utility model newly adds an oil storage and ventilation screw pipe 3 with an oil storage box 33 above the bearing inner cover for negative pressure compensation of the bearing inner cover to avoid oil leakage inside the motor; the inner diameter of the oil storage box 33 is larger than the inner diameter of the oil pipe, and when the oil liquid rises, it can condense on the inner wall of the oil storage box 33, which can effectively condense and store the oil liquid; the principle of negative pressure compensation is used to reduce the oil leakage inside the motor caused by negative pressure. The internal pressure of the bearing chamber is automatically balanced by external gas, which reduces the problem of negative pressure oil leakage of the motor from the source, and realizes oil mist condensation and automatic reflux through simple structural changes.
[0053] The utility model also provides a motor, including the above-mentioned sliding bearing device. The motor can achieve the same technical effects. For other structures of the motor, please refer to the prior art, and the utility model will not be elaborated herein.
[0054] The above description of the disclosed embodiments enables those skilled in the art to implement or use the utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A sliding bearing device, characterized in that, It includes a bearing housing (1), a bearing bush (2), and an oil storage and ventilation screw pipe (3). The bearing bush (2) is fixed to the bearing housing (1). A rotating shaft (4) is to be assembled inside the bearing bush (2), and the rotating shaft (4) can slide relative to the bearing bush (2) to achieve rotation. The oil storage and ventilation screw pipe (3) includes a reducing joint (31), an oil pipe (32), an oil storage box (33), and a breather cap (34). The oil storage box (33) is communicated with the oil pipe (32), and the inner diameter of the oil storage box (33) is larger than that of the oil pipe (32). The oil storage and ventilation screw pipe (3) is installed on the bearing housing (1) through the reducing joint (31) and is communicated with an oil collecting cavity (11) arranged inside the bearing housing (1). The oil storage and ventilation screw pipe (3) is in air communication with the outside through the breather cap (34).
2. The sliding bearing device according to claim 1, characterized in that The oil pipe (32) includes a lower oil pipe (321) and an upper oil pipe (322). The oil storage box (33) is communicatively arranged between the lower oil pipe (321) and the upper oil pipe (322).
3. The sliding bearing device according to claim 2, characterized in that, The lower oil pipe (321) and the upper oil pipe (322) are arranged in a staggered manner.
4. The sliding bearing device according to claim 2, characterized in that, The upper end of the lower oil pipe (321) extends into the interior of the oil storage box (33), and an oil return notch (3211) is arranged at the upper end of the lower oil pipe (321).
5. The sliding bearing device according to claim 2, characterized in that, The top end of the lower oil pipe (321) is fixedly connected to the oil storage box (33) by a thread, and the bottom end of the upper oil pipe (322) is fixedly connected to the oil storage box (33) by a thread. Sealing gaskets are arranged between the lower oil pipe (321) and the oil storage box (33), and between the upper oil pipe (322) and the oil storage box (33). The bottom end of the lower oil pipe (321) is fixedly connected to the reducing joint (31) by a thread. The top end of the upper oil pipe (322) is fixedly connected to the breather cap (34) by a thread.
6. The sliding bearing device according to claim 2, characterized in that, The lower oil pipe (321) and / or the upper oil pipe (322) is a bent pipe.
7. The sliding bearing device according to claim 1, characterized in that The cross-sectional area of the oil storage box (33) is at least three times that of the oil pipe (32).
8. The sliding bearing device according to any one of claims 1 to 7, characterized in that, Two of the oil storage and ventilation screw pipes (3) are installed on the bearing housing (1). Two oil collecting cavities (11) are arranged inside the bearing housing (1), and each oil storage and ventilation screw pipe (3) is communicated with one oil collecting cavity (11). The two oil storage and ventilation screw pipes (3) are respectively arranged on the inner side and the outer side of the machine.
9. The sliding bearing device according to claim 8, characterized in that, The structures and dimensions of the two oil storage and ventilation screw pipes (3) installed on the bearing housing (1) are the same.
10. A motor, characterized in that, It includes the sliding bearing device according to any one of claims 1 to 9.