Motor integrated with self-powered intelligent lubrication and shaft current elimination device

Abstract

The invention relates to a motor integrated with a self-powered intelligent lubrication and shaft current elimination device. The motor comprises a motor body, a front end cover assembly, a rear end cover assembly, an oil storage tank, a transmitter and a control panel. The front end cover assembly and the rear end cover assembly are each provided with an oil injection channel, oil outlets are located above the oil injection channels, residual oil can be prevented from flowing automatically, and accurate control over the oil injection amount is achieved. The oil injection channel is connected with the oil nozzle, lubricating oil is directly injected between the bearing and the ball, and the lubricating efficiency is improved. A carbon fiber brush type shaft current eliminating device is arranged in the front end cover containing cavity, shaft current generated by the rotating shaft can be guided to the motor shell to be grounded, and electric corrosion of the bearing is avoided. The power generation module is integrated in the rear end cover and generates power through rotation of the rotating shaft to supply power to the control part. Intelligent and accurate control of the lubricating system and effective suppression of the shaft current are achieved, the operation reliability and the lubricating efficiency of the motor are improved, and the service life of the motor is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric motors, and in particular to an electric motor integrated with a self-powered intelligent lubrication and shaft current elimination device. BACKGROUND

[0002] As a core power equipment in the industrial field, the reliability and service life of an electric motor directly affect the continuity and stability of a production system. Bearings are key components in an electric motor that bear mechanical loads and ensure the stable operation of a rotor, and the lubrication state of the bearings directly affects the operating efficiency and service life of the electric motor. Traditional lubrication methods mostly use periodic manual greasing or oiling, which has problems such as difficulty in accurately controlling the amount of oil, relying on experience to determine the timing of oiling, and easy waste or insufficient lubrication of oil. In addition, under conditions such as variable frequency driving or asymmetric magnetic field, shaft current is easily generated in the shaft of the electric motor, which forms electric erosion through the bearings, accelerates the wear of the bearings, and reduces the service life of the electric motor.

[0003] Currently, some technologies have attempted to introduce an automatic oiling system or a shaft current elimination device into an electric motor. For example, a timing oiling or temperature-triggered oiling method is used, but it is still difficult to achieve precise lubrication matching the actual working condition of the bearings. In terms of shaft current elimination, methods such as grounding carbon brushes, insulating bearings, or shaft grounding devices are mostly used, but these methods are often complex in structure, inconvenient to maintain, and independent of the lubrication system, and fail to achieve functional integration and collaborative optimization.

[0004] Therefore, there is a lack of an integrated electric motor structure that can simultaneously achieve precise lubrication and shaft current elimination in the prior art, which makes it difficult to effectively prolong the overall service life of the bearings and the electric motor while ensuring the lubrication effect. SUMMARY

[0005] The technical problem to be solved by the present application is that the existing electric motor bearing lubrication and oiling are not accurate, easy to waste, and cannot be matched with the real-time running state, and the shaft current causes electric erosion of the bearings and affects the service life. The present application provides an integrated electric motor that can achieve intelligent and precise oiling and effectively eliminate shaft current, thereby improving lubrication efficiency, prolonging bearing life, and enhancing system reliability.

[0006] To solve the above technical problems, the technical solution adopted by the present application is:

[0007] The application discloses a motor integrated with self-powered intelligent lubrication and shaft current elimination device, which comprises a motor body, a front end cover assembly connected to the front end of the motor body and a rear end cover assembly connected to the rear end of the motor body, a motor rotating shaft penetrating through the front end cover assembly and the rear end cover assembly, an oil injection channel arranged on the front end cover assembly and the rear end cover assembly, one end of the oil injection channel being connected with an oil injection pipe and the other end of the oil injection channel being formed with an oil outlet, and the oil injection channel and the oil outlet being configured to prevent the lubricating oil in the oil injection channel from flowing out of the oil outlet uncontrollably under the action of gravity when the oil injection operation of supplying the lubricating oil to the oil injection channel is stopped, so as to realize accurate control of the oil injection amount.

[0008] Preferably, the oil outlet is arranged above the oil injection channel, so that the lubricating oil in the oil injection channel can be retained in the channel under the action of gravity when the oil injection operation is stopped, thereby avoiding self-flowing overflow of the lubricating oil from the oil outlet.

[0009] Preferably, the front end cover assembly and / or the rear end cover assembly is further provided with an oil injection nozzle, the oil injection nozzle comprising an oil injection pipe and an oil injection port, the oil injection pipe being arranged along the direction of the motor rotating shaft so that the oil injection port is close to the motor bearing and the ball, and the oil injection port being directed towards the bearing and the ball.

[0010] Preferably, the front end cover assembly comprises a front end cover and a shaft current elimination device connected to the front end cover, the shaft current elimination device being in contact with the motor rotating shaft and guiding the shaft current to the ground.

[0011] Preferably, the front end cover is provided with a front end cover accommodating cavity, the shaft current elimination device is arranged in the accommodating cavity, the oil outlet is directed towards the accommodating cavity, the shaft current elimination device comprises a fixed cover connected to the front end cover and a carbon fiber brush connected to the fixed cover, the carbon fiber brush has brush hairs in contact with the motor rotating shaft, the brush hairs guide the shaft current to the fixed cover and then to the front end cover and then to the ground.

[0012] Preferably, the rear end cover assembly comprises a rear end cover, the rear end cover is provided with a rear end cover accommodating cavity, and a power generation module is arranged in the rear end cover accommodating cavity, the power generation module comprises a power generation coil and a magnet ring driven by the motor rotating shaft to generate power.

[0013] Preferably, the motor further comprises an oil storage tank and a transmitter mounted on the motor shell, the oil storage tank is connected with the transmitter, the transmitter is provided with two groups of oil injection pipe interfaces connected with the oil injection pipe of the front end cover assembly and the oil injection pipe of the rear end cover assembly respectively, so as to form two oil paths which are independent of each other and supply oil to the front end cover assembly and the rear end cover assembly respectively.

[0014] Preferably, the transmitter is fixed on the motor shell through a mounting bracket, a clamping portion is arranged on the back of the mounting bracket, the clamping portion is matched and installed with the feather wing on the motor shell, and a transparent plate for observing the internal lubricating oil level is arranged on the oil storage tank.

[0015] Preferably, two groups of sensor interfaces for connecting sensors on the front end cover assembly and the rear end cover assembly respectively are further arranged on the transmitter, a display screen for displaying sensor parameters is further arranged on the transmitter, and a control panel connected with the transmitter is further arranged, the control panel is installed on the motor shell, and the control panel is used for controlling oil injection of the transmitter according to parameters detected by the sensor.

[0016] Preferably, a power generation module driven by the motor rotating shaft is arranged on the rear end cover, the power generation module generates power when the motor rotating shaft rotates, and the power generation module provides power support for the control panel and the transmitter.

[0017] The motor provided by the application has the following beneficial effects:

[0018] 1. Precise oil injection is realized, and lubrication efficiency is improved: the oil outlet of the oil injection channel is arranged above the channel, so that residual oil is prevented from flowing back after oil injection is stopped, and the amount and frequency of oil injection are dynamically adjusted according to parameters such as rotation speed and temperature fed back by the sensor in combination with the cooperative control of the transmitter and the control panel, so that the bearing oil film is always in the best state, lubricating oil waste is reduced, and the dependence on oil viscosity is reduced.

[0019] 2. Shaft current is effectively eliminated, and bearing life is prolonged: the carbon fiber brush type shaft current elimination device is arranged in the front end cover accommodating cavity, the bristles are in contact with the rotating shaft and guide the shaft current to the motor shell ground, so that the electric erosion damage of the current to the bearing is inhibited, and the operation reliability and service life of the motor are significantly improved.

[0020] 3. Dual-path independent oil injection is adapted to differences between front and rear ends: the transmitter is provided with two groups of independent oil injection pipe interfaces corresponding to the front and rear end cover assemblies, and differential oil injection control can be performed according to the actual working conditions of the bearings at the two ends, so that the oil injection precision and system adaptability are further improved.

[0021] 4. Integrated sensing and intelligent control: sensors are arranged on the front and rear end covers to monitor the motor operating state in real time, intelligent oil injection decisions are made based on data, and the system automation level and maintenance convenience are improved.

[0022] 5. Compact structure and integrated functions: the oil injection system, the shaft current elimination device and the rear end power generation module are integrated in the motor body, external auxiliary equipment is reduced, installation space is saved, and system complexity is reduced.

[0023] 6. With self-generating function, energy saving and environmental protection: The power generation module set in the rear end cover can generate electricity by cutting the magnetic lines of force when the shaft rotates, providing power for the transmitter and control panel, reducing dependence on external power supply, improving system energy efficiency and application scenarios, and saving electricity.

[0024] 7. Visual and modular design: The transparent plate is set in the oil tank to facilitate observation of the oil quantity, and the sensor and oil injection nozzle are installed in a modular manner for easy disassembly and maintenance, improving user experience and system maintainability. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the present application will be further described below in conjunction with the drawings and embodiments. The drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings:

[0026] Figure 1 is a schematic diagram of the shaft side structure of the motor of the preferred embodiment of the present application;

[0027] Figure 2 is another schematic diagram of the shaft side structure of the motor of the preferred embodiment of the present application;

[0028] Figure 3 is a schematic diagram of the shaft side structure of the motor body (without front and rear end covers) of the preferred embodiment of the present application;

[0029] Figure 4 is a schematic diagram of the shaft side structure of the front end cover assembly of the preferred embodiment of the present application;

[0030] Figure 5 is an exploded schematic diagram of the front end cover assembly of the preferred embodiment of the present application;

[0031] Figure 6 is a schematic diagram of the shaft side structure of the front end cover of the preferred embodiment of the present application;

[0032] Figure 7 is an exploded schematic diagram of the shaft current elimination device of the preferred embodiment of the present application;

[0033] Figure 8 is a schematic diagram of the shaft side structure of the rear end cover assembly of the preferred embodiment of the present application;

[0034] Figure 9 is an exploded schematic diagram of the rear end cover assembly of the preferred embodiment of the present application;

[0035] Figure 10 is a schematic diagram of the shaft side structure of the oil tank and the transmitter of the preferred embodiment of the present application;

[0036] Figure 11This is another axial view of the oil storage tank and transmitter according to a preferred embodiment of this application. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this application. Obviously, the described embodiments are some embodiments of this application, but not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application.

[0038] A preferred embodiment of this application provides an electric motor integrating a self-powered intelligent lubrication and shaft current elimination device; such as... Figures 1-3 As shown, the device includes a motor body 10, a front cover assembly 20 connected to the front end of the motor body, and a rear cover assembly 30 connected to the rear end of the motor body. The motor shaft 101 passes through both the front cover assembly and the rear cover assembly, and the motor's balls 103 and bearings 104 are located at the connection points between the front cover assembly, the rear cover assembly, and the motor housing 100. An oil reservoir 40 and a transmitter 60 connected to the oil reservoir are connected to the motor housing 100. The transmitter is mounted on the motor housing via a mounting bracket 600. A control board 50 connected to the transmitter is also mounted on the motor housing. The oil reservoir stores lubricating oil, which is then delivered to the front cover assembly 20 and the rear cover assembly 30 via the transmitter and injected into the bearings and balls for operation, thereby achieving precise oil injection.

[0039] Specifically, such as Figures 4-7As shown, the front end cover assembly 20 comprises a front end cover 200, which is provided with a front end cover accommodating cavity 206 towards the motor side, and an oil injection channel 207 corresponding to the accommodating cavity on the front end cover, the oil injection channel forms an oil outlet 205 towards one end of the front end cover accommodating cavity, and the other end is connected to an oil injection pipe 204, which is connected to the transmitter so as to realize the conveying of lubricating oil from the oil tank through the transmitter to the oil injection pipe 204 and then into the front end cover accommodating cavity 206. It should be noted that since the front end cover assembly 20 is stationary relative to the motor shell, the oil injection channel 207 is arranged below the front end cover 200, so that the oil outlet 205 is above the oil injection channel. The lubricating oil entering the oil injection pipe 204 needs to be under the action of injection pressure to pass through the oil injection channel 207 and then be discharged through the oil outlet 205, so that the oil injection control is more accurate. The conventional oil injection channel is above the oil outlet. At this time, when the injection pressure is stopped, there is often still some residual oil in the oil injection channel 207, which may gradually be discharged through the oil outlet under the action of gravity, resulting in excessive oil injection. In the present application, the oil outlet is arranged above the oil injection channel. Once the oil injection work is stopped, the lubricating oil in the oil injection channel will not be discharged through the oil outlet, and the oil injection is relatively more accurate. The front end cover assembly 20 is also provided with an oil injection nozzle 203. The lubricating oil passing through the oil outlet is injected into the bearing and the ball through the oil injection nozzle for lubrication. The oil injection nozzle comprises an oil injection pipe 2030 and an oil injection port 2031. The oil injection pipe is arranged along the direction of the motor shaft and directs the oil injection port 2031 towards the ball and the bearing, so as to reduce the distance between the oil injection port and the ball and the bearing, so that the lubricating oil sprayed by the oil injection port falls directly and accurately into the bearing gap or between the ball and the bearing, achieving better lubrication effect. The lubricating effect of the lubricating oil is better, and the use amount of the lubricating oil can be reduced, the viscosity of the lubricating oil is lower, the waste of the lubricating oil is avoided, the added lubricating oil is ensured to participate in lubrication, the utilization rate of the lubricating oil is improved, and the lubricating oil of the bearing is kept in a relatively ideal state for a long time. It should be noted that in the present application, the oil outlet is arranged above the oil injection channel, so that the lubricating oil in the oil injection channel can be retained in the channel due to the action of gravity when the oil injection operation is stopped, thereby preventing the lubricating oil from flowing out of the oil outlet, thereby realizing accurate control of the oil injection amount. Arranging the oil outlet above the oil injection channel is a preferred embodiment. In order to achieve the same anti-flow function, other equivalent fluid control structures can also be used. For example, a micro one-way valve (such as a spring check valve) can be integrated in the oil injection channel. The valve is opened to supply oil under the action of oil injection pressure, and is quickly closed by spring force or its own structure when the oil injection pressure disappears, thereby physically blocking the channel to prevent the lubricating oil from flowing out of the oil outlet under the action of gravity. Those skilled in the art can select a suitable valve body according to the actual installation space and pressure parameters and arrange it at a suitable position of the oil injection channel.

[0040] Further, as shown in FIG. 2, Figures 4-7As shown, the motor shaft rotation during operation of the motor will generate shaft current, in order to reduce the influence of the shaft current on the motor, the front end cover containing cavity 206 is connected with the shaft current elimination device 202, the shaft current elimination device and the middle part of the front end cover are provided with through holes 201, the motor shaft 101 passes through the through hole and can rotate in the through hole. The shaft current elimination device 202 includes a carbon fiber brush 2021, and a fixed cover 2020 disposed on both sides of the carbon fiber brush. The carbon fiber brush is fixed by the fixed cover, and the carbon fiber brush is provided with a brush 2022 on the side facing the through hole. When the motor shaft rotates in the through hole, the brush contacts the motor shaft and transmits the generated shaft current to the carbon fiber brush through the brush of the carbon fiber brush, and the shaft current is guided to the front end cover 200 by the fixed cover 2020. Finally, the shaft current is grounded through the motor shell (the motor is usually placed on the ground, that is, the motor shell is grounded), thereby realizing the elimination of the shaft current and prolonging the service life of the motor. It should be noted that a circular hole should be provided on the shaft current elimination device, and the oil nozzle 203 passes through the circular hole and is connected with the oil outlet 205 to realize that the lubricating oil enters the oil nozzle through the oil injection channel without affecting the work of the shaft current elimination device 202. The upper end of the front end cover is provided with a sensor 70, which can detect the speed, environmental temperature, oil injection frequency and single oil injection amount and other related important parameters of the motor. The specific sensor 70 includes a sensor circuit board and a sensor shell mounted with the sensor. The sensor is mounted on the front end cover through a magnet, which also facilitates the disassembly and assembly of the sensor. The running state of the motor is detected through the sensor, so as to select the most appropriate oil injection speed and oil injection amount to inject oil into the bearing, so that the oil film on the bearing ball is at the most appropriate thickness.

[0041] Further, as shown in Figures 8-9 The rear end cover assembly 30 includes a rear end cover 300, and the rear end cover is provided with a rear end cover containing cavity. The oil injection structure of the rear end cover is the same as that of the front end cover, and the oil outlet is arranged above the oil injection channel to realize precise oil injection. The rear end cover containing cavity is provided with a power generation module 301, which includes a power generation coil 3011 and a magnet ring 3012 arranged in the rear end cover containing cavity, and a power generation shell 3010 for fixing the power generation coil and the magnet ring. The middle part of the rear end cover 300 and the power generation module 301 is provided with a through hole 201 through which the motor shaft passes. When the motor shaft rotates during operation of the motor, the magnetic force line is cut to realize power generation through the power generation module. The power generation can be used to supply power for the transmitter 60 and the control panel 50. At the same time, the rear end cover is also provided with a sensor to detect the speed and temperature of the rear end cover assembly.

[0042] Further, as shown in Figures 10-11As shown, the oil tank 40 is provided with a transparent plate 400, and the remaining amount of lubricating oil in the oil tank can be observed through the transparent plate. The motor housing 100 is provided with a plurality of wings 102, and the back of the mounting bracket 600 is provided with a clamping portion 605 corresponding to the wings. The transmitter is fixed on the motor housing through the clamping portion. Two groups of sensor interfaces 603 are arranged above and below the transmitter, which are respectively connected to the sensors on the front end cover assembly and the rear end cover assembly, and the detection parameters of the sensors are displayed through the display screen 601, which is convenient for observation. Each group of sensor interfaces is provided with an oil injection pipe interface 604, and the oil injection pipes on the front end cover assembly and the rear end cover assembly are respectively connected to a group of oil injection pipe interfaces to form an oil circuit (not shown in the figure), so that after the sensor detects the parameters of the front end cover or the rear end cover, the control panel 50 controls the oil injection operation, and the oil injection pipe interfaces separately inject oil into the front end cover assembly and the rear end cover assembly, so that the oil injection circuits of the front end cover assembly and the rear end cover assembly are independent of each other. And due to the installation position of the transmitter, the distance between the transmitter and the front end cover assembly and the rear end cover assembly is different, resulting in different lengths of the two oil circuits, that is, the length of each group of oil injection pipe interfaces to the corresponding oil injection pipe 204 is different. If only one oil circuit is used to inject oil at this time, due to the different environments of the bearings and balls at the front and rear ends of the motor, the required amount of oil injection is often different. By using two oil circuits to independently control the oil injection, the oil injection work is more accurate, and each oil circuit can inject a more appropriate amount of lubricating oil to ensure the operation of the balls and bearings of the front end cover or the rear end cover and adapt to their respective environments, thereby ensuring the working efficiency of the motor. It should be noted that a heating device can also be arranged in the oil tank to heat the lubricating oil to an appropriate temperature for oil injection, thereby reducing the viscosity of the lubricating oil and facilitating the oil injection work. At the same time, the newly added lubricating oil has a temperature close to that of the existing lubricating oil in the bearing, ensuring that the viscosity and physical properties of the newly added lubricating oil and the existing lubricating oil in the bearing are basically the same, avoiding heating of the bearing due to the different temperatures of the newly added lubricating oil and the existing lubricating oil in the bearing, and prolonging the service life of the bearing.

[0043] It should be understood that the present application is described by some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to the features and embodiments without departing from the spirit and scope of the present application. In addition, the features and embodiments can be modified to adapt to specific conditions and materials under the teaching of the present application without departing from the spirit and scope of the present application. Therefore, the present application is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope of the present application.

Claims

1. An electric motor integrating a self-powered intelligent lubrication and shaft current elimination device, comprising an electric motor body, a front cover assembly connected to the front end of the electric motor body, and a rear cover assembly connected to the rear end of the electric motor body, wherein the electric motor shaft passes through the front cover assembly and the rear cover assembly, characterized in that: The front end cover assembly and the rear end cover assembly are provided with oil injection channels, one end of the oil injection channel is connected with an oil injection pipe, and the other end forms an oil outlet, the structure of the oil injection channel and the oil outlet is configured to prevent the lubricating oil in the oil injection channel from flowing out of the oil outlet uncontrollably under the action of gravity when the oil injection operation of supplying lubricating oil to the oil injection channel is stopped, thereby realizing accurate control of the amount of oil injection.

2. The electric motor of claim 1, wherein: The oil outlet is arranged above the oil injection channel, so that the lubricating oil in the oil injection channel can be retained in the channel under the action of gravity when the oil injection operation is stopped, thereby preventing the lubricating oil from flowing out of the oil outlet.

3. The electric motor of claim 1, wherein: The front end cover assembly and / or the rear end cover assembly are further provided with an oil injection nozzle, the oil injection nozzle comprises an oil injection pipe and an oil injection port, the oil injection pipe is arranged along the direction of the motor shaft to make the oil injection port close to the motor bearing and the ball, and the oil injection port faces the bearing and the ball.

4. The electric motor of claim 3, wherein: The front end cover assembly comprises a front end cover and a shaft current elimination device connected with the front end cover, the shaft current elimination device is in contact with the motor shaft and guides the shaft current to the ground.

5. The electric motor of claim 4, wherein: The front end cover is provided with a front end cover accommodating cavity, the shaft current elimination device is arranged in the accommodating cavity, and the oil outlet faces the accommodating cavity, the shaft current elimination device comprises a fixed cover connected with the front end cover and a carbon fiber brush connected with the fixed cover, the carbon fiber brush has bristles in contact with the motor shaft, the bristles guide the shaft current to the fixed cover and then to the front end cover to the ground.

6. The electric motor of claim 3, wherein: The rear end cover assembly comprises a rear end cover, the rear end cover is provided with a rear end cover accommodating cavity, and the rear end cover accommodating cavity is provided with a power generation module, the power generation module comprises a power generation coil and a magnet ring driven by the motor shaft to generate electricity.

7. The electric motor of any one of claims 1-6, wherein: Further comprising an oil storage tank and a transmitter mounted on the motor housing, the oil storage tank is connected with the transmitter, the transmitter is provided with two groups of oil injection pipe interfaces connected with the oil injection pipes of the front end cover assembly and the rear end cover assembly respectively, thereby forming two oil paths independent of each other and supplying oil to the front end cover assembly and the rear end cover assembly respectively.

8. The electric motor of claim 7, wherein: The transmitter is fixed on the motor housing by a mounting bracket, the back of the mounting bracket is provided with a clamping part, the clamping part is matched and installed with the feather wing on the motor housing, and the oil storage tank is provided with a transparent plate for observing the internal lubricating oil level.

9. The electric motor of claim 8, wherein: The transmitter is further provided with two groups of sensor interfaces for connecting sensors on the front end cover assembly and the rear end cover assembly respectively, and a display screen for displaying sensor parameters, further comprising a control panel connected with the transmitter, the control panel is installed on the motor housing and used for controlling the oil injection operation of the transmitter according to the parameters detected by the sensors.

10. The electric motor of claim 9, wherein: The rear end cover is provided with a power generation module driven by the motor shaft, the power generation module generates electricity when the motor shaft rotates, thereby providing power support for the control panel and the transmitter.

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