High-speed explosion-proof motor with double-end direct connection load

Abstract

The invention provides a high-speed explosion-proof motor of a double-end direct connection load, and belongs to the field of explosion-proof motors. The problems that a traditional explosion-proof motor driving system is complex and large in occupied space are solved. The system comprises a lubricating oil station, a high-speed motor and an explosion-proof device, the high-speed motor is provided with a plurality of output ends used for being directly connected with a load, the high-speed motor is arranged above the lubricating oil station, and the explosion-proof device is arranged above the high-speed motor and used for monitoring the state of the high-speed motor. The driving device is mainly used for driving the two-stage compression unit.

Description

Technical Field

[0001] The invention belongs to the field of explosion-proof motors, and particularly relates to a high-speed explosion-proof motor with double-end direct connection to a load. Background Art

[0002] The petroleum and chemical industries are important components of industrial production. However, the working environments in these industries often pose risks of inflammability and explosion. Therefore, the motors used in these industries must possess high levels of safety and reliability to prevent fire or explosion accidents caused by motor failures. Due to their special design and manufacturing, explosion-proof motors can operate safely in these environments and thus have been widely applied.

[0003] Traditional explosion-proof motor products mainly drive the load by using a conventional speed motor in series with a transmission at a single end. The drawback of this technology is that the complexity of the drive system is increased due to the multiple series devices, while the efficiency and reliability of the drive system are reduced. Moreover, in multi-stage compression application scenarios, multiple sets of drive units need to be used simultaneously, which increases the cost of the drive equipment.

[0004] The application of high-speed direct-connected explosion-proof motors in the petroleum and chemical industries not only improves the operating efficiency and safety of equipment but also significantly reduces maintenance costs and energy consumption. Their compact design, high reliability, and long service life make them an important development direction for key equipment in the petrochemical industry. With the continuous progress of technology, high-speed direct-connected explosion-proof motors will play a greater role in the future and provide strong support for the development of the petroleum and chemical industries.

[0005] In the invention, through the innovative design and use of a high-speed motor, a lubricating oil station, and an explosion-proof device, the high-speed direct-connected explosion-proof motor directly drives the compressor loads at both ends, effectively reducing the complexity of the drive system. At the same time, using one set of equipment to drive two-stage compression units not only saves the use space but also effectively reduces the energy consumption. The invention also has outstanding advantages such as high efficiency, low noise, and small volume. Summary of the Invention

[0006] In view of this, the invention aims to provide a high-speed explosion-proof motor with double-end direct connection to a load to solve the problems of complex drive system and large space occupation of traditional explosion-proof motors.

[0007] To achieve the above object, the invention adopts the following technical solutions: A high-speed explosion-proof motor with double-end direct connection to a load, characterized in that it includes a lubricating oil station, a high-speed motor, and an explosion-proof device. The high-speed motor is provided with a plurality of output ends for directly connecting to the load. The high-speed motor is arranged above the lubricating oil station, and the explosion-proof device is arranged above the high-speed motor for monitoring the state of the high-speed motor.

[0008] Furthermore, the lubricating oil station includes an oil mist separator, a tank temperature transmitter, a heater, an oil drain valve, a tank, a heat exchanger, a liquid level gauge, a filter, an oil temperature transmitter, an oil pressure transmitter, an accumulator, a water pressure gauge, a water pipeline valve, a water pipeline, an oil pump, and an oil pipeline. The oil mist separator, the tank temperature transmitter, the heater, the oil drain valve, and the liquid level gauge are all connected to the tank. The heat exchanger is arranged on one side of the tank. The tank is connected to the oil pipeline. The oil temperature transmitter, the oil pressure transmitter, and the oil pump are arranged on the oil pipeline. One end of the water pipeline is connected to a water source, and the other end is connected to a high-speed motor for cooling the high-speed motor. The water pressure gauge and the water pipeline valve are arranged on the water pipeline. The accumulator is connected to the oil pipeline. Both the water pipeline and the oil pipeline are connected to the heat exchanger.

[0009] Furthermore, a cover plate for maintenance is arranged on one side of the lubricating oil station.

[0010] Furthermore, the high-speed motor includes a low-voltage explosion-proof junction box, a breather valve, a stator temperature measurement device, a bearing temperature measurement device, a vibration sensor, a bearing housing, a flexible inlet oil pipe, an oil distributor, a flexible cooling water pipe, a bearing sleeve, an end potting, a coil, a stator, a housing, a rotor, a bearing bush, and a dynamic oil seal. The stator is sleeved with the housing on the outside, the coil is arranged on the inner ring, and the end potting is arranged at both ends. The housing is connected to the water pipeline through the flexible cooling water pipe. The bearing bush is arranged in the inner ring of the bearing sleeve and is arranged in the bearing housing together with the dynamic oil seal for supporting the rotor. The bottom of the bearing housing is connected to the top wall of the tank. The stator temperature measurement device, the bearing temperature measurement device, and the vibration sensor are all connected to the bearing housing and are all connected to the low-voltage explosion-proof junction box. The oil pipeline is connected to the oil distributor. The oil distributor is connected to the bearing housing through the flexible inlet oil pipe. The breather valve is arranged on the bearing housing.

[0011] Furthermore, the rotor includes a rotating shaft, a sheath, a magnetic steel, and a magnetic isolation ring. The magnetic steel is arranged on the inner layer of the middle part of the rotating shaft and is isolated by the magnetic isolation ring, and the sheath is arranged on the outer layer.

[0012] Furthermore, shaft sleeves are arranged at both ends of the rotating shaft.

[0013] Furthermore, a lifting ring is arranged on the upper part of the bearing housing.

[0014] Furthermore, the stator temperature measurement device, the bearing temperature measurement device, and the vibration sensor are all connected to the low-voltage explosion-proof junction box through sensor lead explosion-proof joints.

[0015] Furthermore, the explosion-proof device includes an explosion-proof junction box, a junction box seat, a positive pressure controller, a positive pressure signal pipe, an intake valve, a fixing bracket, a flexible intake pipe, a pressure relief device, and a flexible exhaust pipe. The stator is connected to the junction box seat through a main lead explosion-proof joint. The junction box seat is fixed to the upper part of the fixing bracket. The explosion-proof junction box is arranged above the junction box seat. The fixing bracket is connected to the fuel tank. The positive pressure controller and the pressure relief device are both arranged on the fixing bracket. The positive pressure controller is connected to the pressure relief device through the positive pressure signal pipe. The intake valve is installed at the inlet end of the positive pressure controller, and the outlet end is connected to the inner cavity of the casing through the flexible intake pipe. The casing is connected to the pressure relief device through the flexible exhaust pipe.

[0016] Furthermore, there is a terminal box at the lower end of the positive pressure controller for transmitting signals to the electrical control end.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. The high-speed motor has outstanding advantages such as high efficiency, low noise, and small volume. It is connected and controlled through an independent explosion-proof device, and can also achieve the ability to operate safely in explosion-proof places, further improving the safety and reliability of electrical drive equipment in explosion-proof places technically. The high-speed motor is provided with several output ends for directly connecting to the load, reducing the intermediate transmission link, reducing energy loss and the risk of mechanical failure, improving the transmission efficiency, enabling the motor to provide power for the load more efficiently, meeting the needs of high-speed rotating equipment, and being able to reduce the temperature load as a whole by the installation method with the fuel tank;

[0019] 2. Multiple sensors and control components in the lubricating oil station work together. The oil temperature transmitter and the oil pressure transmitter monitor the oil temperature and pressure in real time, and cooperate with the oil pump, oil filter, etc. to ensure that clean, stable lubricating oil with appropriate temperature and pressure is provided for key components such as the bearings of the high-speed motor, effectively extending the service life of the key components of the motor and reducing the probability of wear and failure;

[0020] 3. One end of the water pipeline is connected to the water source, and the other end is connected to the high-speed motor. Cooperating with the water pressure gauge and the water pipeline valve, the cooling water flow and pressure can be accurately controlled to achieve efficient cooling of the high-speed motor. At the same time, the heat exchanger connects the oil pipeline and the water pipeline to realize the heat exchange between oil and water, further optimizing the thermal management of the entire system, ensuring that the motor operates within a stable temperature range, and improving the stability and reliability of the motor operation;

[0021] 4. Components such as the positive pressure controller and the pressure relief device in the explosion-proof device work together. By filling positive pressure gas into the casing, it prevents external flammable and explosive gases from entering, and at the same time relieves pressure in a timely manner when the pressure is abnormal, ensuring the safe operation of the motor in a flammable and explosive environment;

[0022] 5. Components such as vibration sensors, stator temperature sensors, and bearing temperature sensors installed on the motor can monitor the operating status of the motor in real time. The data is connected to the low-voltage explosion-proof junction box through the explosion-proof joints of the sensor leads, facilitating the staff to timely understand the operating conditions of the motor, discover potential fault hazards in advance, and achieve preventive maintenance.

[0023] 6. The structural design of the rotor, such as the settings of magnetic steel, magnetic isolation ring, and sheath, optimizes the magnetic field distribution of the motor, improving the efficiency and stability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0025] Figure 1 is the front view of a high-speed explosion-proof motor with a double-ended direct connection load according to the present invention;

[0026] Figure 2 is the side view of the lubricating oil station according to the present invention;

[0027] Figure 3 is the front view of the lubricating oil station according to the present invention;

[0028] Figure 4 is the front view of the high-speed motor according to the present invention;

[0029] Figure 5 is the cross-sectional view of the high-speed motor according to the present invention;

[0030] Figure 6 is the side view of the explosion-proof device according to the present invention;

[0031] Figure 7 is the front view of the explosion-proof device according to the present invention.

[0032] In the figures:

[0033] Lubricating oil station 101; High-speed motor 102; Explosion-proof device 103; Oil mist separator 201; Tank temperature transmitter 202; Heater 203; Drain valve 204; Tank 205; Heat exchanger 206; Liquid level gauge 207; Oil filter 208; Oil temperature transmitter 209; Oil pressure transmitter 210; Accumulator 211; Water pressure gauge 212; Water pipeline valve 213; Water pipeline 214; Oil pump 215; Oil pipeline 216; Cover plate 217; Low-voltage explosion-proof junction box 301; Sensor lead explosion-proof joint 302; Breather valve 303; Stator temperature measurement 304; Main lead explosion-proof joint 305; Bearing temperature measurement 306; Vibration sensor 307; Lifting ring 308; Bearing housing 309; Flexible oil inlet pipe 310; Foundation bolt 311; Oil distributor 312; Flexible cooling water pipe 313; Bearing sleeve 314; End potting 315; Coil 316; Stator 317; Housing 318; Bush 319; Rotating shaft 320; Sheath 321; Magnetic steel 322; Magnetic isolation ring 323; Bearing bush 324; Dynamic oil seal 325; Explosion-proof junction box 401; Junction box seat 402; Positive pressure controller 403; Positive pressure signal pipe 404; Intake valve 405; Fixing screw 406; Terminal box 407; Fixing bracket 408; Flexible intake pipe 409; Fixing bolt 410; Pressure relief device 411; Flexible outlet pipe 412; Bracket fixing bolt 413. Detailed implementation manners

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention may be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0035] Detailed implementation manner 1: Refer to Figure 1 This implementation manner will be described. A high-speed explosion-proof motor with a double-ended direct-connected load includes a lubricating oil station 101, a high-speed motor 102, and an explosion-proof device 103. The high-speed motor 102 is provided with a plurality of output ends for directly connecting to a load. The high-speed motor 102 is arranged above the lubricating oil station 101, and the explosion-proof device 103 is arranged above the high-speed motor 102 for monitoring the state of the high-speed motor 102.

[0036] Detailed implementation manner 2: Refer to Figure 2 and 3Description of this embodiment, the lubricating oil station 101 includes an oil mist separator 201, a tank temperature transmitter 202, a heater 203, an oil drain valve 204, a tank 205, a heat exchanger 206, a liquid level gauge 207, an oil filter 208, an oil temperature transmitter 209, an oil pressure transmitter 210, an accumulator 211, a water pressure gauge 212, a water pipeline valve 213, a water pipeline 214, an oil pump 215 and an oil pipeline 216. The oil mist separator 201, the tank temperature transmitter 202, the heater 203, the oil drain valve 204 and the liquid level gauge 207 are all connected to the tank 205. The heat exchanger 206 is arranged on one side of the tank 205. The tank 205 is connected to the oil pipeline 216. The oil pipeline 216 is provided with an oil temperature transmitter 209, an oil pressure transmitter 210 and an oil pump 215. One end of the water pipeline 214 is connected to a water source and the other end is connected to the high-speed motor 102 for cooling the high-speed motor 102. The water pipeline 214 is provided with a water pressure gauge 212 and a water pipeline valve 213. The accumulator 211 is connected to the oil pipeline 216. The water pipeline 214 and the oil pipeline 216 are both connected to the heat exchanger 206. When the high-speed motor is running, the lubricating oil will generate oil mist under the agitation of the high-speed rotating parts. If not processed in time, the oil mist will accumulate inside the motor. On the one hand, it may affect the heat dissipation effect inside the motor. On the other hand, it may also contaminate the electrical components inside the motor and reduce its insulation performance. The oil mist separator 201 is specifically welded to the tank 205 through a pipeline, which can effectively separate and collect the oil mist generated during the operation of the motor, convert it back into liquid oil and return it to the tank, reducing the oil mist pressure inside the motor. This not only avoids the adverse effects of the oil mist on the internal environment of the motor, but also reduces the loss of lubricating oil, improves the utilization rate of lubricating oil, and ensures the long-term stable operation of the motor. The temperature of the lubricating oil in the tank 205 has an important impact on the performance of the entire lubrication system. If the temperature is too high, the viscosity of the lubricating oil will decrease, resulting in poor lubrication effect and unable to effectively protect the key components of the motor. If the temperature is too low, the viscosity of the lubricating oil increases and the fluidity becomes poor, which may affect the normal operation of the oil pump and the transportation of the oil. The tank temperature transmitter 202 is installed on the tank 205 to monitor the temperature of the lubricating oil in the tank 205 in real time and convert the temperature signal into an electrical signal and transmit it to the control system. The staff can understand the temperature state of the lubricating oil in the tank in time based on these data, so as to take corresponding measures, such as adjusting the oil temperature through a heater or a cooling system, to ensure that the lubricating oil is always within the appropriate working temperature range and ensure the stable operation of the lubrication system. In some low-temperature environments, the viscosity of the lubricating oil in the tank 205 will increase significantly and the fluidity will become poor, which will make it difficult for the oil pump to transport the lubricating oil to the parts that need lubrication, affecting the normal start-up and operation of the motor.When the oil tank temperature transmitter detects that the oil temperature is too low, the heater 203 starts to work, heating the lubricating oil in the oil tank, raising the temperature of the lubricating oil, reducing its viscosity, restoring its good fluidity, ensuring that the lubrication system can still work normally in a low-temperature environment, and providing reliable lubrication guarantee for the start-up and operation of the high-speed motor. The oil drain valve is used to drain the oil. The liquid level gauge 207 is used to display the oil quantity in the oil tank. The filter 208 is provided to filter the oil entering the motor, ensuring the stable and normal operation of the motor. The oil temperature transmitter 209 and the oil pressure transmitter 210 are used to detect the temperature and pressure of the oil, making it easier to master the operating parameters of the motor and improving the stability of the motor operation. The accumulator 211 is specifically arranged on one side of the heat exchanger 206 to maintain the oil pressure during the start-up and accident states of the motor, so that the motor can keep running continuously. The water pressure gauge 212 is used to display the pressure in the water pipeline 214, and the water pipeline valve 213 is used to control the opening and closing of the water pipeline 214 and is used to close the water pipeline 214 when necessary. The oil pump 215 is connected in the oil pipeline 216 to generate a circulating oil pressure to supply the bearing bush 324 of the high-speed motor for lubrication.

[0037] In this embodiment, a cover plate 217 for maintenance is provided on one side of the lubricating oil station 101. The cover plate 217 is easy to disassemble, so that the lubricating oil station 101 can be repaired.

[0038] Specific Embodiment 3: Refer to Figure 4 and 5Description of this embodiment, the high-speed motor 102 includes a low-voltage explosion-proof junction box 301, a breather valve 303, a stator temperature sensor 304, a bearing temperature sensor 306, a vibration sensor 307, a bearing housing 309, a flexible oil inlet pipe 310, an oil distributor 312, a flexible cooling water pipe 313, a bearing sleeve 314, an end potting 315, a coil 316, a stator 317, a housing 318, a rotor, a bearing bush 324 and a dynamic oil seal 325. The stator 317 is sleeved with the housing 318 on the outside, the coil 316 is arranged on the inner ring, and the end potting 315 is arranged at both ends. The housing 318 is connected to the water pipeline 214 through the flexible cooling water pipe 313. The bearing bush 324 is arranged on the inner ring of the bearing sleeve 314 and is arranged in the bearing housing 309 together with the dynamic oil seal 325 for supporting the rotor. The bottom of the bearing housing 309 is connected to the top wall of the oil tank 205 through the foundation bolts 311. The stator temperature sensor 304, the bearing temperature sensor 306 and the vibration sensor 307 are all connected to the bearing housing 309 and are all connected to the low-voltage explosion-proof junction box 301. The oil pipeline 216 is connected to the oil distributor 312. The oil distributor 312 is connected to the bearing housing 309 through the flexible oil inlet pipe 310. The breather valve 303 is arranged on the bearing housing 309. Low-voltage explosion-proof junction box 301: As a key component for the electrical connection of the high-speed motor, it provides a safe wiring space for devices such as the stator temperature sensor 304, the bearing temperature sensor 306, and the vibration sensor 307. In an explosion-proof environment, it can effectively prevent the internal electric spark from contacting the external flammable and explosive gas, avoid explosion accidents, ensure the safe and stable operation of the motor electrical system, and at the same time facilitate the installation, maintenance and repair of the electrical circuit by the staff. The breather valve 303 is installed on the bearing housing 309 and is mainly used to balance the air pressure inside and outside the motor. When the motor is running, the internal temperature rises, causing the gas to expand. When the motor stops, the temperature drops and the gas contracts. The breather valve can open or close in time in these two cases, allowing the gas to flow in and out smoothly, preventing damage to the motor seals due to pressure imbalance, ensuring the stability of the internal environment of the motor, and extending the service life of the motor. The stator temperature sensor 304 is connected to the bearing housing 309 and is connected to the low-voltage explosion-proof junction box 301 to monitor the temperature of the stator in real time. The stator will generate heat due to the passing of current during operation. Excessive temperature may cause the insulation material to age and be damaged, affecting the motor performance and even causing failures. The stator temperature measurement can timely feedback the temperature data. Once the temperature is abnormal, the staff can take cooling measures through the control system to ensure the normal operation of the stator. The bearing temperature sensor 306 is also connected to the bearing housing 309 and the low-voltage explosion-proof junction box 301, focusing on monitoring the bearing temperature. The bearing is an important supporting component for the operation of the motor. It bears a large load and friction during operation. Excessive temperature is likely to cause problems such as wear and burn. The bearing temperature measurement allows the staff to timely understand the bearing temperature condition, and adjust the lubrication, cooling and other systems in time when the temperature exceeds the standard, protecting the bearing and ensuring the stable operation of the motor. The vibration sensor 307 is installed on the bearing housing 309 and is connected to the low-voltage explosion-proof junction box 301 for monitoring the vibration of the motor during operation.When the motor is running normally, the vibration amplitude is within a certain range. If a fault occurs, such as bearing wear, rotor imbalance, etc., the vibration will increase abnormally. The vibration sensor can detect the vibration change in time and transmit the signal to the control system. Based on this, the staff can judge the operating state of the motor, discover potential fault hazards in advance, and carry out preventive maintenance. The bearing housing 309 is not only the installation carrier of the bearing bush 324 and the dynamic oil seal 325, which is used to support the rotor and ensure the stable rotation of the rotor; its bottom is connected to the top wall of the oil tank 205, which can form an additional heat transfer path; at the same time, it is also the installation foundation of the stator temperature measurement 304, the bearing temperature measurement 306, the vibration sensor 307, and the breather valve 303, playing an important role in connecting and supporting multiple key components and being one of the key structures to maintain the normal operation of the motor. The flexible inlet oil pipe 310 connects the oil distributor 312 and the bearing housing 309. It has a certain flexibility and can effectively compensate for the position changes caused by factors such as equipment vibration and installation errors, ensuring that the lubricating oil is smoothly transported from the oil distributor to the bearing housing, providing stable lubrication for components such as bearings, reducing the poor lubrication caused by pipeline connection problems, and ensuring the reliable operation of the motor lubrication system. The oil distributor 312 is connected to the oil pipeline 216. Its function is to evenly distribute the lubricating oil from the oil pipeline to each lubrication-needed part. For example, it accurately transports the lubricating oil to the bearing housing 309 through the flexible inlet oil pipe 310, ensuring that each lubrication point can obtain an appropriate amount of lubricating oil, improving the lubrication efficiency, reducing component wear, and extending the service life of the motor. The flexible cooling water pipe 313 connects the machine shell 318 and the water pipeline 214. Using its own flexibility, while meeting the displacement of the machine shell caused by vibration, thermal expansion and contraction, etc., it ensures that the cooling water flow stably enters the machine shell from the water pipeline, takes away the heat generated during the operation of the motor, effectively cools the machine shell and internal components, ensures that the motor operates within an appropriate temperature range, and improves the reliability and stability of the motor.

[0039] The bearing sleeve 314 serves as the installation base for the bearing bush 324, providing precise positioning and support for the bearing bush, ensuring stable operation when the bearing bush supports the rotor. At the same time, it also plays a role in protecting the bearing bush and isolating external impurities, extending the service life of the bearing bush and ensuring the smooth rotation of the rotor. The end potting 315 is arranged at both ends of the stator 317 to seal and fix the ends of the coil 316. It can prevent impurities such as dust and moisture from invading the ends of the coil, improving the insulation performance of the coil; at the same time, it enhances the mechanical strength of the coil ends, enabling them to withstand the electromagnetic force and vibration during motor operation, avoiding coil loosening and displacement, and ensuring the stable electrical performance of the motor. The coil 316 is one of the core components for the motor to achieve the conversion between electrical energy and mechanical energy. When alternating current is applied, the coil generates an alternating magnetic field, interacts with the rotor, generates electromagnetic force, and drives the rotor to rotate, thus realizing the conversion of electrical energy to mechanical energy of the motor and providing power for the load. The stator 317 is sleeved with a housing 318 on the outside and the coil 316 is installed on the inner ring. It is the core structure of the stationary part of the motor. It jointly forms the magnetic circuit system of the motor with the rotor. The magnetic field generated by the stator interacts with the rotor to realize the normal operation of the motor. At the same time, the stator also provides support and fixation for the coil, ensuring the stability of the coil during operation. The housing 318 is sleeved on the outside of the stator 317, not only playing a role in protecting the internal stator, coil and other components from external mechanical damage and environmental erosion; but also being connected to the water pipeline 214 through the flexible cooling water pipe 313, participating in the cooling system of the motor, transferring the heat generated during motor operation to the cooling medium, and ensuring the normal operating temperature of the motor. The rotor is the rotating part of the motor, consisting of a rotating shaft 320, a sheath 321, a permanent magnet 322, a magnetic isolation ring 323, etc. Under the action of electromagnetic force, the rotor rotates at high speed, outputs mechanical energy, and provides power for the load. It is the key component to realize the function of the motor. The bearing bush 324 is arranged in the inner ring of the bearing sleeve 314 and is installed in the bearing housing 309 together with the dynamic oil seal 325, and is used to support the rotating shaft 320 of the rotor. When the rotor rotates at high speed, a lubricating oil film is formed between the bearing bush and the rotating shaft, playing a role in reducing friction, wearing resistance and buffering, ensuring the smooth and stable rotation of the rotor, reducing the friction and wear between the rotating shaft and the bearing housing, and extending the service life of the motor. The dynamic oil seal 325 is installed in the bearing housing 309 together with the bearing bush 324, mainly used to prevent lubricating oil leakage, and at the same time prevent external impurities, dust, etc. from entering the inside of the bearing housing, ensuring a good lubricating environment inside the bearing housing, maintaining the normal operation of the bearing bush and the bearing, and ensuring the stable operation of the motor.

[0040] In this embodiment, the rotor includes a rotating shaft 320, a sheath 321, a permanent magnet 322, and a magnetic isolation ring 323. The middle inner layer of the rotating shaft 320 is provided with a permanent magnet 322 and then isolated by a magnetic isolation ring 323, and a sheath 321 is provided on the outer layer. Rotating shaft 320: As the core component of the rotor, it is the support structure of the entire rotor and plays a key role in connecting and transmitting power. When the motor is running, the rotating shaft drives other components on the rotor to rotate at high speed together, and transmits the mechanical energy generated by the motor to the load. Its mechanical strength and precision directly affect the performance and stability of the motor, and it is required to have sufficient rigidity and wear resistance to withstand the centrifugal force and various mechanical stresses generated during high-speed rotation, ensuring that the rotor can operate smoothly and reliably. The sheath 321 is installed on the outer layer of the rotating shaft 320 and is mainly used to offset the centrifugal force generated by the permanent magnet 322. When the rotor rotates at high speed, the permanent magnet will generate a large centrifugal force due to its own mass and high-speed rotation, which may pose a threat to the structural stability of the rotor. The sheath effectively disperses and offsets this centrifugal force through its own structure and material properties, ensuring the structural integrity and stability of the rotor during high-speed rotation, preventing problems such as displacement and shedding of the permanent magnet due to excessive centrifugal force, and thus ensuring the normal operation of the motor. The permanent magnet 322 is arranged in the middle inner layer of the rotating shaft 320 and is the key component for the rotor to generate a magnetic field. When the motor is running, the coil 316 through which alternating current is passed generates an alternating magnetic field, which interacts with the magnetic field generated by the permanent magnet to generate an electromagnetic force to drive the rotor to rotate. The performance of the permanent magnet, such as magnetic induction intensity and coercive force, directly affects the output torque and efficiency of the motor. High-quality permanent magnets can improve the performance of the motor and make it more efficiently convert electrical energy into mechanical energy. The magnetic isolation ring 323 is used to isolate the permanent magnet 322 and is installed outside the permanent magnet. Its main function is to optimize the magnetic field distribution, prevent the magnetic field generated by the permanent magnet from leaking and interfering, enable the magnetic field to interact with the stator magnetic field more concentratedly and effectively, and improve the electromagnetic conversion efficiency of the motor. At the same time, the magnetic isolation ring can also protect other surrounding components from the influence of the magnetic field, ensure the normal operation of each component inside the motor, and maintain the stable performance of the motor.

[0041] In this embodiment, shaft sleeves 319 are provided at both ends of the rotating shaft 320 for connecting load components.

[0042] In this embodiment, a lifting ring 308 is provided on the upper part of the bearing seat 309. The lifting ring 308 can help lift the bearing seat 309 and the entire motor to a designated position, such as on an oil tank.

[0043] In this embodiment, the stator temperature sensor 304, the bearing temperature sensor 306, and the vibration sensor 307 are all connected to the low-voltage explosion-proof junction box 301 through the sensor lead explosion-proof joint 302, which is beneficial for use in an explosion-proof environment.

[0044] Specific embodiment 4: Refer to Figure 6 and 7Description of this embodiment: The explosion-proof device 103 includes an explosion-proof junction box 401, a junction box base 402, a positive pressure controller 403, a positive pressure signal pipe 404, an intake valve 405, a fixing bracket 408, a flexible intake pipe 409, a pressure relief device 411, and a flexible outlet pipe 412. The stator 317 is connected to the junction box base 402 through a main lead explosion-proof joint 305. The junction box base 402 is fixed to the upper part of the fixing bracket 408. The explosion-proof junction box 401 is arranged above the junction box base 402. The junction box base 402 is connected to the fixing bracket 408 through fixing bolts 410. The fixing bracket 408 is connected to the fuel tank 205. Both the positive pressure controller 403 and the pressure relief device 411 are arranged on the fixing bracket 408. Among them, the positive pressure controller 403 is connected to the fixing bracket 408 through fixing screws 406. The positive pressure controller 403 and the pressure relief device 411 are connected through the positive pressure signal pipe 404. The inlet end of the positive pressure controller 403 is equipped with an intake valve 405, and the outlet end is connected to the inner cavity of the housing 318 through a flexible intake pipe 409. The housing 318 is connected to the pressure relief device 411 through a flexible outlet pipe 412. There is a terminal box 407 at the lower end of the positive pressure controller 403 for transmitting signals to the electrical control end. The fixing bracket 408 is connected to the fuel tank 205 through bracket fixing bolts 413.

[0045] The explosion-proof junction box 401, as a key component of the explosion-proof device, provides a safe sealed space for the electrical connection of the motor. In a flammable and explosive environment, it can effectively prevent the electric sparks generated by internal electrical components from contacting the external flammable and explosive gases, thus avoiding the occurrence of explosion accidents and ensuring the safe operation of the motor electrical system. At the same time, it is convenient for the staff to install, repair, and maintain the circuits in the junction box.

[0046] The junction box base 402 plays a role in connecting and supporting the explosion-proof junction box 401. It is connected to the stator 317 through the main lead explosion-proof joint 305, introducing the electrical circuits of the motor into the junction box. And it is fixed to the upper part of the fixing bracket 408, providing a stable installation foundation for the explosion-proof junction box and ensuring the stability of the entire electrical connection system.

[0047] The positive pressure controller 403 is the core control component of the explosion-proof device. Its inlet end is equipped with an intake valve 405. By controlling the opening degree of the intake valve, it regulates the gas flow and pressure entering the inner cavity of the housing 318. The outlet end is connected to the inner cavity of the housing through a flexible intake pipe 409, filling the housing with positive pressure gas to make the pressure inside the housing higher than the external flammable and explosive environment pressure, preventing the external flammable and explosive gases from entering the interior of the housing. The terminal box 407 at the lower end is used to transmit signals to the electrical control end, facilitating the staff to monitor and remotely control the working state of the positive pressure controller in real time, ensuring that a suitable positive pressure environment is always maintained inside the housing.

[0048] The positive pressure signal pipe 404 connects the positive pressure controller 403 and the pressure relief device 411, and is used to transmit the positive pressure signal. The positive pressure controller precisely controls the opening and closing of the intake valve 405 according to the pressure information fed back by the positive pressure signal pipe, and maintains the stability of the positive pressure inside the casing. When the pressure inside the casing changes abnormally, the positive pressure signal pipe can promptly transmit the pressure change signal to the positive pressure controller and the pressure relief device, so that they can take corresponding actions to ensure the normal operation of the explosion-proof device.

[0049] The intake valve 405 is installed at the inlet end of the positive pressure controller 403, and its opening and closing and opening degree are controlled by the positive pressure controller. By adjusting the opening degree of the intake valve, the gas flow rate and pressure entering the casing 318 can be controlled to ensure that the positive pressure higher than the external environment is always maintained inside the casing, effectively preventing flammable and explosive gases from entering the casing, and providing guarantee for the safe operation of the motor.

[0050] The fixing bracket 408 is not only connected to the fuel tank 205 to provide a stable installation foundation for the entire explosion-proof device, but also used to fix components such as the positive pressure controller 403, the pressure relief device 411, and the junction box seat 402. It plays a role in connecting and supporting each component, enabling the components of the explosion-proof device to work together, and ensuring the stability and reliability of the explosion-proof device.

[0051] The flexible intake pipe 409 connects the outlet end of the positive pressure controller 403 and the inner cavity of the casing 318, and has a certain flexibility. It can ensure the stable delivery of positive pressure gas from the positive pressure controller to the inside of the casing while satisfying the displacement of the casing caused by vibration, thermal expansion and contraction, etc., guarantee the stability of the positive pressure environment inside the casing, and prevent the leakage or unsmooth delivery of positive pressure gas due to pipeline connection problems.

[0052] The pressure relief device 411 is installed on the fixing bracket 408 and is connected to the positive pressure controller 403 through the positive pressure signal pipe 404. When the pressure inside the casing 318 is too high and exceeds the set safety value, the pressure relief device automatically opens, and discharges the excess gas inside the casing through the flexible outlet pipe 412, so that the pressure inside the casing returns to the normal range, preventing damage to the casing and internal components caused by excessive pressure, and ensuring the safe operation of the motor.

[0053] The flexible outlet pipe 412 connects the casing 318 and the pressure relief device 411, and also has flexibility. When the pressure relief device works, it can smoothly discharge the excess gas inside the casing, and at the same time adapt to the displacement of the casing caused by various factors, ensure the smoothness of the pressure relief process, avoid affecting the pressure relief effect due to pipeline problems, and guarantee the normal pressure relief function of the explosion-proof device.

[0054] Working principle of the lubricating oil station:

[0055] The fuel tank 205 is used to store lubricating oil. The oil mist separator 201 can separate oil mist to ensure the cleanliness of the air in the fuel tank. The fuel tank temperature transmitter 202 monitors the oil temperature in the fuel tank in real time. When the oil temperature is too low, the heater 203 starts to heat. The drain valve 204 is used to discharge impurities or waste oil in the fuel tank. The level gauge 207 monitors the oil level in the fuel tank. The oil pump 215 transports the lubricating oil in the fuel tank 205 through the oil pipeline 216. The oil temperature transmitter 209 and the oil pressure transmitter 210 monitor the oil temperature and oil pressure in the oil pipeline respectively. The accumulator 211 can maintain the oil pressure stability for a certain period of time in case of special situations such as the failure of the oil pump. One end of the water pipeline 214 is connected to the water source, and the other end is connected to the high-speed motor 102. The water pressure gauge 212 monitors the water pressure, and the water pipeline valve 213 controls the on-off of the water flow. The water in the water pipeline 214 and the oil in the oil pipeline 216 exchange heat in the heat exchanger 206, thereby adjusting the oil temperature to ensure that the lubricating oil works at an appropriate temperature.

[0056] Working principle of the high-speed motor:

[0057] Electric energy is connected through the low-voltage explosion-proof junction box 301 and enters the coil 316 of the stator 317 to generate a rotating magnetic field. The inner-layer magnetic steel 322 in the middle of the rotating shaft 320 of the rotor drives the rotating shaft 320 to rotate under the action of the rotating magnetic field. The magnetic isolation ring 323 prevents the magnetism of the magnetic steel 322 from affecting other components, and the sheath 321 protects the magnetic steel 322 and the magnetic isolation ring 323. The shaft sleeves 319 at both ends of the rotating shaft 320 can reduce wear. The bearing bush 324 and the dynamic oil seal 325 in the bearing housing 309 support the rotor to ensure the stable rotation of the rotor. The lubricating oil in the oil pipeline 216 enters the bearing housing 309 through the oil distributor 312 and the flexible inlet oil pipe 310 to lubricate and cool the bearing bush 324, etc. The machine shell 318 is connected to the water pipeline 214 through the flexible cooling water pipe 313, and the water in the water pipeline 214 cools the machine shell 318 to take away the heat generated by the operation of the motor. The stator temperature measurement 304, the bearing temperature measurement 306 and the vibration sensor 307 monitor the operation state of the motor in real time, and transmit the signals to the low-voltage explosion-proof junction box 301 through the sensor lead explosion-proof joint 302 so that the operator can master the motor state.

[0058] Working principle of the explosion-proof device:

[0059] The intake valve 405 opens, and outside air enters the positive pressure controller 403, and then enters the inner cavity of the casing 318 through the flexible intake pipe 409, so as to keep the inside of the casing 318 at positive pressure. The positive pressure controller 403 is connected to the pressure relief device 411 through the positive pressure signal pipe 404 to monitor the pressure inside the casing 318 in real time. When the pressure inside the casing 318 is too high, the pressure relief device 411 relieves pressure through the flexible exhaust pipe 412 to ensure that the pressure inside the casing 318 is within a safe range. The terminal box 407 at the lower end of the positive pressure controller 403 transmits signals to the electrical control end, which is convenient for remotely monitoring and controlling the working state of the explosion-proof device. The stator 317 is connected to the junction box seat 402 through the main lead explosion-proof joint 305 and then connected to the explosion-proof junction box 401 to ensure the explosion-proof performance of the electrical connection.

[0060] When the existing conventional speed explosion-proof motor drives a high-speed load, it needs to be realized by connecting a transmission in series, which causes problems such as large occupied space of the driving equipment, low transmission efficiency, and increased system complexity. The high-speed explosion-proof motor with double-ended direct connection to the load not only reduces the volume of the motor but also eliminates the intermediate series transmission, and has obvious advantages in driving efficiency. Taking the high-speed explosion-proof motor of the first domestic double-ended direct-connected steam compressor designed by the inventor as an example, the system efficiency is increased by about 15%. The maintenance of the driving system of the existing conventional speed explosion-proof motor is mainly for the gearbox: the lubricating oil of the gearbox needs to be replaced every six months, and most of the explosion-proof places are in areas with poor environmental conditions, high temperature difference, and the oil seal is easy to age and leak oil. If not dealt with in time, it will seriously affect the life of the reduction gearbox. After the high-speed explosion-proof motor with double-ended direct connection to the load directly drives the load, the intermediate series gearbox is eliminated, and only the routine maintenance of the motor body is required, which saves the maintenance workload and maintenance consumables. Through the analysis and research of electromagnetism, structural layout, temperature field, manufacturing process, materials, etc., the present invention improves the safety and reliability of the high-speed motor. The designed rated power of the high-speed motor is 160 kW, the rated frequency is 833.33 Hz, the number of poles is 4 poles, the rated voltage is 380 V, and the insulation class is class H of 180, which meets the explosion-proof certification standard.

[0061] The specific embodiments of the present invention disclosed above are only used to help illustrate the present invention. The specific embodiments do not describe all the details in detail, nor limit the invention to the specific embodiments described. According to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can understand and utilize the present invention well.

Claims

1. A high-speed explosion-proof motor with double-end direct-connected load, characterized in that: The invention comprises a lubricating oil station (101), a high-speed motor (102) and an explosion-proof device (103); the high-speed motor (102) is provided with a plurality of output terminals for directly connecting to a load; the high-speed motor (102) is arranged above the lubricating oil station (101); and the explosion-proof device (103) is arranged above the high-speed motor (102) for monitoring the state of the high-speed motor (102).

2. A high-speed explosion-proof motor with double-end direct-connected load according to claim 1, characterized in that: The lubricating oil station (101) comprises an oil mist separator (201), an oil tank temperature transmitter (202), a heater (203), an oil drain valve (204), an oil tank (205), a heat exchanger (206), a liquid level gauge (207), an oil filter (208), an oil temperature transmitter (209), an oil pressure transmitter (210), an energy storage device (211), a water pressure gauge (212), a water pipeline valve (213), a water pipeline (214), an oil pump (215) and an oil pipeline (216). The oil mist separator (201), the oil tank temperature transmitter (202), the heater (203), the oil drain valve (204) and the liquid level gauge (207) are all connected to the oil tank (205). ), the heat exchanger (206) is arranged on one side of the oil tank (205), the oil tank (205) is connected to the oil pipeline (216), the oil pipeline (216) is provided with an oil temperature transmitter (209), an oil pressure transmitter (210) and an oil pump (215), one end of the water pipeline (214) is connected to a water source, and the other end is connected to the high-speed motor (102) for cooling the high-speed motor (102), the water pipeline (214) is provided with a water pressure gauge (212) and a water pipeline valve (213), the energy accumulator (211) is connected to the oil pipeline (216), and the water pipeline (214) and the oil pipeline (216) are both connected to the heat exchanger (206).

3. A high-speed explosion-proof motor with double-end direct-connected load according to claim 2, characterized in that: A cover plate (217) for maintenance is provided on one side of the lubricating oil station (101).

4. A high-speed explosion-proof motor with double-end direct-connected load according to claim 2 or 3, characterized in that: The high-speed motor (102) comprises a low-voltage explosion-proof junction box (301), a breathing valve (303), a stator temperature measurement (304), a bearing temperature measurement (306), a vibration sensor (307), a bearing seat (309), a flexible oil inlet pipe (310), an oil separator (312), a flexible cooling water pipe (313), a bearing sleeve (314), an end seal (315), a coil (316), a stator (317), a housing (318), a rotor, a bearing bush (324) and a dynamic oil seal (325). The stator (317) is sleeved with a housing (318) on the outside, a coil (316) is arranged on the inner ring, and end seals (315) are arranged at both ends. The housing (318) is connected to the housing through a flexible cooling water pipe ( The bearing housing (313) is connected to the water pipeline (214), the bearing bush (324) is arranged on the inner ring of the bearing sleeve (314) and is arranged together with the dynamic oil seal (325) in the bearing seat (309) for supporting the rotor, the bottom of the bearing seat (309) is connected to the top wall of the oil tank (205), the stator temperature measurement (304), the bearing temperature measurement (306), and the vibration sensor (307) are all connected to the bearing seat (309), and are all connected to the low-voltage explosion-proof junction box (301), the oil pipeline (216) is connected to the oil separator (312), and the oil separator (312) is connected to the bearing seat (309) through a flexible oil inlet pipe (310), and the bearing seat (309) is provided with a breathing valve (303).

5. A high-speed explosion-proof motor with double-end direct-connected load according to claim 4, characterized in that: The rotor comprises a rotating shaft (320), a sleeve (321), a magnetic steel (322) and a magnetic isolation ring (323); the magnetic steel (322) is arranged on the inner layer of the middle part of the rotating shaft (320) and then isolated by the magnetic isolation ring (323); and the sleeve (321) is arranged on the outer layer.

6. A high-speed explosion-proof motor with double-end direct-connected load according to claim 5, characterized in that: Shaft sleeves (319) are provided at both ends of the rotating shaft (320).

7. A high-speed explosion-proof motor with double-end direct-connected load according to claim 4, characterized in that: A lifting ring (308) is provided on the upper portion of the bearing seat (309).

8. The high-speed explosion-proof motor with double-end direct-connected load according to claim 4, characterized in that: The stator temperature measurement (304), the bearing temperature measurement (306) and the vibration sensor (307) are all connected to the low-voltage explosion-proof junction box (301) via a sensor lead explosion-proof connector (302).

9. A high-speed explosion-proof motor with double-end direct-connected load according to claim 4, characterized in that: The explosion-proof device (103) comprises an explosion-proof junction box (401), a junction box seat (402), a positive pressure controller (403), a positive pressure signal tube (404), an air intake valve (405), a fixed bracket (408), a flexible air intake pipe (409), a pressure relief device (411) and a flexible air outlet pipe (412); the stator (317) is connected to the junction box seat (402) via a main lead explosion-proof connector (305); the junction box seat (402) is fixed on the upper part of the fixed bracket (408); the explosion-proof junction box (401) is arranged on the junction box seat (409); 02), the fixed bracket (408) is connected to the oil tank (205), the positive pressure controller (403) and the pressure relief device (411) are both arranged on the fixed bracket (408), the positive pressure controller (403) and the pressure relief device (411) are connected via a positive pressure signal tube (404), an air intake valve (405) is installed at the inlet end of the positive pressure controller (403), and the outlet end is connected to the inner cavity of the casing (318) via a flexible air intake pipe (409), and the casing (318) is connected to the pressure relief device (411) via a flexible air outlet pipe (412).

10. A high-speed explosion-proof motor with double-end direct-connected load according to claim 9, characterized in that: The positive pressure controller (403) has a terminal box (407) at the lower end thereof for transmitting signals to the electrical control end.

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