A spinning machine with a main shaft directly driven by a fully oil-cooled oil film bearing

Abstract

A spinning machine with a direct spindle drive and fully oil-cooled oil film bearings relates to a spinning machine. A hollow shaft is disposed within the casing. One end of the hollow shaft is rotatably connected to and mounted on a steel material inlet via a rolling bearing, while the other end is rotatably connected to and mounted on a spinning head via an oil film bearing. A spinning pipe is mounted on the spinning head and connected to the steel material inlet. A first oil reservoir is disposed at the end of the oil film bearing, with a first oil nozzle mounted at a corresponding position. A rotor is mounted on the exterior of the hollow shaft, with a second oil reservoir disposed at the end of the rotor. Several oblique through-holes are provided in the middle of the rotor, with second oil nozzles mounted at corresponding positions. The stator is sleeved onto the exterior of the rotor, with an oil chamber disposed on the exterior of the stator, which is connected to an oil inlet and an oil outlet. The integrated design of the spinning machine and motor shortens the transmission chain. The hollow shaft directly drives high-speed transmission, resulting in stable, fast, and impact-free speed change. Full oil cooling enables low-temperature operation of the oil film bearings and maintenance-free operation of the rotor and stator, extending their service life.

Description

Technical Field

[0001] The invention relates to a laying head, in particular to a laying head with a main shaft directly driven full oil cooling oil film bearing, belonging to the technical field of high-speed wire production equipment. Background Art

[0002] The laying head is the main process equipment in the high-speed wire production line. After gradual research and development, the fifth and sixth generation laying heads are all horizontal side-drive layouts, designed to be tilted 15° or 20° downward along the rolling line. They consist of a laying pipe mounted on a rotating mandrel (hollow shaft) and a transmission device. The rotating mandrel is driven by a pair of helical gear shafts through a coupling and a DC or AC speed-controlled motor. The motor power is 250KW, the speed range is 1000-1800RPM, and the speed ratio is 0.582. Figure 1 The figure shows the arrangement of the traditional spinning machine. The spinning tube rotates at a set speed to produce a coil with the required outer diameter. The output shaft of the spinning machine consists of a spinning head and a hollow shaft. Figure 2 The figure shows the structural transmission diagram of a traditional spinning head. The spinning head is used to fix the spinning tube. The oil film bearing at the front end of the hollow shaft carries the radial working load and the rolling bearing at the rear end is axially positioned to fix the output shaft system in the box. The hollow shaft is inside the transmission box and is connected to the input shaft by a bevel gear drive. The input shaft is connected to the motor shaft through a coupling. The motor is generally equipped with a cooler to meet the requirements of long-term high-load operation. The transmission chain is motor-coupling-input shaft-bevel gear-hollow shaft. At present, the oil film bearing spinning head has relatively good industry applications. For example, the applicant's previously applied and authorized application number CN202020320837.5, announcement date November 10, 2020, and the Chinese utility model patent titled "A spinning head using a non-contact dynamic pressure oil film bearing"

[0003] However, during production and operation, the spinning machine often changes speed rapidly at high speed according to process requirements. The traditional transmission chain is long, the energy consumption is high, the speed adjustment response is slow, and the transmission mechanical structure is relatively complex, which is not conducive to the rapid speed change application of the spinning machine. In addition, the coupling and bevel gears are clearance-fitted, which will produce impact during rapid speed adjustment. The 90° meshing spiral bevel gear also requires high transmission accuracy, and the side-drive bevel gear has a horizontal thrust on the hollow shaft. When the transmission speed changes, the thrust is also in a changing state, which is not conducive to the smooth operation of the hollow shaft and can easily cause vibration during the operation of the spinning machine, shortening the life of transmission components such as bearings. At the same time, the finished wire passes through the middle of the hollow shaft. The high-temperature red steel, which is generally at 850℃-1000℃, transfers heat to the inside of the hollow shaft. The heat transfer causes the operating temperature of the oil film bearing to generally be 90℃-110℃. The high operating temperature will affect the service life of the oil film bearing, and it is generally necessary to replace it after two years of use. The motor cooling also requires regular maintenance due to the high dust on the production site. If maintenance is not carried out in time, it will also cause high-temperature damage to the motor. In addition, the motor power is 250KW and the cooling fan power is about 8KW. The motor and cooler have to run at the same time, which also consumes a lot of energy. In addition, regular maintenance or fault repair and replacement of the main machine requires special tooling for drawing, press-fitting the coupling, and adjusting the coaxiality, which is time-consuming and labor-intensive and affects work efficiency. In addition, according to the layout of the traditional spinning machine and motor, the transmission direction on both sides is distinguished, that is, the spinning machine equipment must be divided into left and right lines, which takes up a lot of space. The increase in the number of spare machines for the left and right lines of the spinning machine further leads to high operating and maintenance costs.

[0004] In summary, due to the problems of slow speed change response, large vibration impact, and high oil film bearing temperature during high-speed operation, the maximum stable speed of the traditional spinning machine is around 120m / s, which limits the speed increase of the spinning machine. Summary of the Invention

[0005] In order to address the shortcomings of the background technology, the present invention provides a main shaft directly driven full oil cooling oil film bearing spinning head, which integrates the spinning head and the motor to shorten the transmission chain. The hollow shaft directly drives the high-speed speed change to be stable, responsive and impact-free. The full oil cooling realizes the low temperature operation of the oil film bearing and the maintenance-free operation of the rotor and stator, thereby extending the service life.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a main shaft directly driven full oil cooling oil film bearing spinning machine, comprising a box body, a hollow shaft, a steel inlet, a spinning head, a spinning pipe, an oil film bearing, a rotor and a stator, a hollow shaft is arranged inside the box body, one end of the hollow shaft is rotatably connected to the box body through a rolling bearing and extends outward to install the steel inlet, the other end of the hollow shaft is rotatably connected to the box body through the oil film bearing and extends outward to install the spinning head, the spinning pipe is spirally installed on the spinning head and connected to the steel inlet through the inside of the hollow shaft, a first oil storage tank is arranged at the end of the oil film bearing, and the first oil storage tank is processed with an oil drain The channel is connected with the inner side of the bearing sleeve of the oil film bearing, and a first oil nozzle is installed at a position corresponding to the slot of the first oil storage tank inside the box body. The rotor is coaxially positioned and installed outside the middle position of the hollow shaft. A plurality of permanent magnets are arranged circumferentially on the outside of the rotor. A second oil storage tank is arranged at the end of the rotor. A plurality of oblique through holes are opened circumferentially in the middle position of the rotor. The plurality of oblique through holes are all connected with the second oil storage tank. A second oil nozzle is installed at a position corresponding to the slot of the second oil storage tank inside the box body. The stator is coaxially sleeved on the outside of the rotor and fixed to the box body. An induction coil is arranged circumferentially on the inside of the stator, and an oil chamber is arranged on the outside of the stator. The oil chamber is connected to an oil inlet hole and an oil drain hole.

[0007] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention respectively installs a rotor and a stator at the corresponding positions of the hollow shaft and the box body, integrates the spinning machine and the motor into an integrated design to form a main shaft direct drive form, shortens the transmission chain to the greatest extent, and saves space at the same time. The hollow shaft directly drives the high-speed speed change stably, responds quickly, and has no impact, which is more conducive to high-speed and long-cycle operation of the equipment, and has high-speed and stable characteristics. In addition, the oil film bearings, rotors, and stators are optimized and improved respectively, and the oil film bearings are internally cooled, the rotors are internally cooled, and the stator oil rings are cooled by oil supply. The low-temperature operation of the oil film bearings and the maintenance-free operation of the rotor and stator are achieved by full oil cooling, thereby extending the service life. The equipment has a simple structure, and its own drive does not require external power connection, reducing the equipment installation investment requirements. The left and right lines are universal, reducing the number of spare parts, and reducing the manufacturing cost and maintenance cost of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is the layout diagram of the traditional spinning machine;

[0009] Figure 2 This is the structural transmission diagram of a traditional spinning machine;

[0010] Figure 3 It is a schematic diagram of the overall structure of the laying head of the present invention;

[0011] Figure 4 1. It is a schematic diagram of the output shaft structure of the laying head of the present invention;

[0012] Figure 5 1 is a schematic side view of the rotor structure of the laying head of the present invention;

[0013] Figure 6 1 is a schematic diagram of the main structure of the rotor of the laying head of the present invention;

[0014] Figure 7 1 is a schematic side view of the stator structure of the laying head of the present invention;

[0015] Figure 8 It is a schematic diagram of the main structure of the stator of the spinning machine of the present invention. DETAILED DESCRIPTION

[0016] The technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] like Figures 3 to 8 As shown, a main shaft directly driven full oil cooling oil film bearing laying head includes a box body 1, a hollow shaft 2, a steel inlet 3, a laying head 4, a laying pipe 5, an oil film bearing 6, a rotor 7 and a stator 8.

[0018] Combine Figure 3~Figure 4 As shown, a hollow shaft 2 is provided inside the housing 1. One end of the hollow shaft 2 is rotatably connected to the housing 1 through a rolling bearing and extends outward to install the steel inlet 3. The rolling bearing serves as an axial fixed bearing of the hollow shaft 2. The other end of the hollow shaft 2 is rotatably connected to the housing 1 through the oil film bearing 6 and extends outward to install the spinning head 4. The steel inlet 3, the hollow shaft 2 and the spinning head 4 constitute an output shaft system.

[0019] Among them, an oil supply hole 6-1 is set at the bottom of the oil film bearing 6 and is connected to the outside of its bearing sleeve. The external oil supply system is connected through the oil supply hole 6-1 to provide lubricating oil to the oil film bearing 6. It is mainly used to form an oil film inside the oil film bearing 6 through pressurized oil to play a bearing and lubricating role, and can also play a certain cooling role. In addition, a first oil storage tank 6-2 is set at the end of the oil film bearing 6. The first oil storage tank 6-2 is processed with an oil discharge channel and is connected to the inner side of the bearing sleeve of the oil film bearing 6. The first oil storage tank 6-2 is an annular structure with an L-shaped cross-section. The first oil nozzle 1-1 is installed at a position corresponding to the notch of the first oil storage tank 6-2 inside the box body 1 by adjusting the angle through the bracket. The external oil supply system is connected to spray lubricating oil to the first oil storage tank 6-2 through the first oil nozzle 1-1. The oil supply pressure is 0.38±0.02MPa and the temperature is 40±2℃. As the hollow shaft 2 rotates under the action of centrifugal force, the lubricating oil sprayed by the first oil nozzle 1-1 is pressed into the space between the hollow shaft 2 and the oil film bearing 6 through the oil discharge channel and then discharged, taking away the heat generated by the oil film bearing 6 and the transferred heat inside the hollow shaft 2. This part of the lubricating oil mainly plays a cooling role, and can also play a certain lubricating role. In this way, the outer and inner sides of the bearing sleeve of the oil film bearing 6 are cooled by lubricating oil, and the maximum heat-resistant working temperature of the oil film bearing 6 can be lower than 150°C. The setting of lubricating oil cooling inside and outside the bearing sleeve can make the ideal working temperature of the oil film bearing 6 no higher than 80°C.

[0020] The spinning pipe 5 is spirally mounted on the spinning head 4 and connected to the steel material inlet 3 through the interior of the hollow shaft 2. The spinning pipe 5 is arranged as a clockwise Archimedean spiral, while the hollow shaft 2 rotates counterclockwise during operation. The rotor 7 is coaxially positioned outside the middle position of the hollow shaft 2. The rotor 7 has an interference fit with the outer wall of the hollow shaft 2 through its inner hole. A key connection is provided between the rotor 7 and the hollow shaft 2, securing the rotor 7 to the hollow shaft 2 in both radial and circumferential rotational torque. Steps can be provided at corresponding positions between the hollow shaft 2 and the rear end of the rotor 7 for positional limiting. After being press-fitted into place, the front end of the rotor 7 is axially secured by a retaining ring, thereby completely securing the rotor 7 to the hollow shaft 2. The stator 8 is coaxially sleeved on the outside of the rotor 7 and connected and fixed to the box body 1. The stator 8 can be fixed in the box body 1 by arranging mounting plates at the bottom and both sides. During installation, the rotor 7 is first fixed on the hollow shaft 2, and the stator 8 is sleeved on the rotor 7. A gap of about 1 mm is left between the stator 8 and the rotor 7. The mounting positions of the mounting plate of the stator 8 and the inner wall of the box body 1 are processed according to the dimensions of the design drawing. After the output shaft system falls into the box body 1 as a whole, the stator 8 and the box body 1 are fixed with bolts through the mounting plate.

[0021] Combine Figure 5~Figure 6As shown, in addition to arranging multiple permanent magnets 7-1 along the circumferential direction on the outer side of the rotor 7 to cooperate with the stator 8 to form a motor drive structure, a second oil storage tank 7-2 is provided at the end of the rotor 7, and a plurality of oblique through holes 7-3 are opened along the circumferential direction in the middle position of the rotor 7. The plurality of oblique through holes 7-3 are all connected to the second oil storage tank 7-2. The second oil storage tank 7-2 is also an annular structure with an L-shaped cross section. The hollow shaft 2 rotates counterclockwise, and the inclination direction of the oblique through holes 7-3 is preferably selected to be clockwise.

[0022] Replay Figure 3~Figure 4 As shown, the second oil nozzle 1-2 is installed at a position corresponding to the notch of the second oil storage tank 7-2 inside the box body 1 by adjusting the angle through the bracket, and the external oil supply system is connected to spray lubricating oil into the second oil storage tank 7-2 through the second oil nozzle 1-2, which mainly plays a cooling role. Under the action of the rotating centrifugal force, the second oil storage tank 7-2 is filled with lubricating oil. When the liquid level reaches the height of the inclined through hole 7-3, the lubricating oil is pressed into the inclined through hole 7-3. After the lubricating oil enters the inclined through hole 7-3, it will form a siphon and be discharged immediately as the hollow shaft 2 rotates. Under the action of rotation, the lubricating oil in the inclined through hole 7-3 will always have an axial outward thrust, and the heat generated by the rotor 7 will be quickly taken away when the lubricating oil passes through, thereby realizing the cooling of the rotor 7. In this process, uninterrupted oil supply is ensured to ensure that the rotor 7 is always in a cooled state.

[0023] Combine Figure 7-Figure 8 As shown, in addition to the induction coil 8-1 arranged circumferentially on the inner side of the stator 8 to cooperate with the rotor 7 to form a motor drive structure, an oil chamber 8-2 is also arranged on the outer side of the stator 8. The oil chamber 8-2 is connected to the oil inlet hole 8-3 and the oil drain hole 8-4. When the induction coil 8-1 is energized, the rotor 7 generates torque to drive the hollow shaft 2 to rotate. The induction coil 8-1 will generate a certain amount of heat when working. A cylindrical oil chamber 8-2 is wrapped around the outer side of the stator 8, and the external oil supply system is connected to supply lubricating oil through the oil inlet hole 8-3 and then discharged from the oil drain hole 8-4. The lubricating oil continuously flows through the oil chamber 8-2 to take away the heat in time, mainly playing a cooling role, so that the stator 8 can work at a balanced and stable temperature line.

[0024] The heat resistance grade of the rotor 7 and the stator 8 is 220°C, the oil supply pressure is 0.38±0.02MPa, the temperature is 40±2°C, and the cooling capacity is 30L / min, which can ensure that the operating temperature of the rotor 7 and the stator 8 is below 60°C, which is a relatively ideal working state.

[0025] Among them, the oil film bearing 6, rotor 7 and stator 8 should be lubricated and cooled by the same external oil supply system. In addition, the rolling bearing at one end of the hollow shaft 2 can also be lubricated and cooled by the same external oil supply system. In this way, the entire machine is lubricated and cooled at low pressure with unified oil supply requirements, thereby enhancing the integrity of the equipment.

[0026] During operation, the induction coil 8-1 of the stator 8 is energized to form a permanent magnet motor drive with the permanent magnet 7-1 of the rotor 7. The rotor 7, the hollow shaft 2 and the spinning head 4 are rigidly connected. The rotor 7 drives the hollow shaft 2 to rotate at the same time. The high-temperature red-hot wire product enters the hollow shaft 2 from the steel inlet 3, and is then coiled into a roll under the action of the spinning tube 5, completing the function of the spinning machine.

[0027] Through the above optimization design, the three sets of shaft systems of the traditional spinning machine are reduced to one set of shaft systems, which not only saves the floor space of the production line, but also shortens the equipment transmission chain to the greatest extent. The hollow shaft 2 is installed with the rotor 7 instead of the traditional motor shaft, and the box 1 is installed with the stator 8 instead of the traditional motor shell. The spinning machine and the motor are integrated into a direct drive design, which makes the mechanical structure simpler. After the main shaft is directly driven, multiple transmission links such as gears and couplings are reduced, which avoids transmission clearance, reduces mechanical efficiency loss, and reduces the rotational inertia of the shaft system, making the speed adjustment response faster and more stable without transmission shock. Direct drive of spindle 2 only bears torque, eliminating the lateral force of the gear transmission. This facilitates stable operation of the output shaft system and extends the service life of oil film bearing 6. It eliminates motor bearings, couplings, laying head input shaft bearings, bevel gears, and other components, improving transmission efficiency and reducing energy consumption by over 10%. It also helps reduce the manufacturing cost of machine components and shortens the manufacturing cycle. It eliminates the need to distinguish between left and right lines, reducing the number of spare machines. During maintenance and replacement, only a single machine needs to be operated directly, providing unlimited flexibility for upgrades and technical modifications. It eliminates the need for drawing, press-fitting couplings, and adjusting coaxiality, resulting in more efficient maintenance and replacement. However, upgrading and renovating traditional laying head equipment is often difficult due to the height and position restrictions of related equipment such as the motor, foundation, base, and speed ratio, as well as the severe limitations of the motor drive direction and left and right line layout, making improvements difficult to achieve.

[0028] At the same time, the oil film bearing 6, rotor 7, and stator 8 are optimized for full oil cooling. Continuous cooling removes heat generated during operation and internal conduction, achieving an ideal high-speed, low-temperature operating state, making the output shaft system more stable and extending the bearing life. The rotor 7 has internal heat transfer issues within the hollow shaft 2. Cooling can prevent overheating and demagnetization of the permanent magnet 7-1. The centrifugal force plus the principle of rotating siphoning through the inclined through hole 7-3 are used to cool the rotor 7, keeping the temperature of the rotor 7 far below the demagnetization temperature of the magnet. The stator 8 is enclosed within the housing 1, and the oil chamber 8-2 is designed to allow low-temperature lubricating oil to flow through it, keeping the stator 8 at a constant temperature and low temperature to maximize its performance. The entire machine uses a system-consistent low-pressure lubricating oil to cool the motor and bearing parts. The system is simple and has strong cooling and temperature assurance. Compared to traditional spinning machines, which require additional cooling equipment for the motor, the improved spinning machine of the present invention is stable and maintenance-free, helping to reduce failures and maintenance frequency.

[0029] The present invention utilizes the rotating nature of the hollow shaft 2 during spinning machine operation to introduce cooling oil, thereby cooling the oil film bearing 6 and rotor 7. This solves the heat dissipation problems of the oil film bearing 6 and the heat insulation of the hollow shaft 2. Forced cooling oil flows between the hollow shaft 2 and the bearing sleeve of the oil film bearing 6, removing heat generated by the operation of the oil film bearing 6 while simultaneously isolating heat conducted from the inside of the hollow shaft 2. A first oil reservoir 6-2, provided at the end of the oil film bearing 6, can also be machined at the corresponding mounting location of the hollow shaft 2, further facilitating manufacturing. A first oil nozzle 1-1 sprays cooling oil into the first oil reservoir 6-2, which is then directed through an oil discharge channel to the contact area between the bearing sleeve of the oil film bearing 6 and the hollow shaft 2. The centrifugal force of the rotation of the hollow shaft 2 forces the cooling oil from the first oil reservoir 6-2 into the space between the bearing sleeve and the hollow shaft 2, where it then escapes. The contact area between the oil film bearing 6 and the hollow shaft 2 is filled with flowing cooling oil, which removes heat generated by the operation of the oil film bearing 6 and heat conducted within the hollow shaft 2, thereby providing internal cooling. The rotor 7 is embedded with permanent magnet steel 7-1, which will be demagnetized when heated to a certain degree. UH grade magnet steel with a heat resistance of 220°C is preferably used. The rotor 7 is fixed on the hollow shaft 2 and there is also the problem of heat conduction. The rotor 7 is cooled by centrifugal oil pressure plus rotating siphon of the inclined through hole 7-3, so that the cooling oil passes through the rotor 7 axially to take away the heat. A second oil storage tank 7-2 is provided at the end of the rotor 7, and the second oil nozzle 1-2 sprays the cooling oil into the second oil storage tank 7-2. The rotor 7 is axially opened with an inclined through hole 7-3 with a clockwise angle. When the hollow shaft 2 rotates counterclockwise during operation, the centrifugal force presses the cooling oil into the inclined through hole 7-3. When the inclined through hole 7-3 rotates counterclockwise from a clockwise angle, a siphon will be generated. In this way, when the hollow shaft 2 rotates, the cooling oil is pressed into the rotor 7. The rotating siphon effect discharges the cooling oil smoothly, takes away the heat conducted by the hollow shaft 2, and keeps the permanent magnet steel 7-1 running at a temperature far below the demagnetization temperature. When stator 8 is operating, induction coil 8-1 generates heat. An oil chamber 8-2 is designed around the outer core of stator 8, circulating cooling oil to dissipate heat from stator 8. This cooling process maintains stator 8 at a low temperature. After overall optimization, the present invention's spinning machine can maintain a stable linear speed of 145 m / s, with the temperature of oil film bearing 6 not exceeding 80°C and vibration ≤ 2.5 mm / s, demonstrating high-speed stability.

[0030] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other configurations without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations coming within the meaning and range of equivalents of the claims are intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0031] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A main shaft directly driven full oil cooling oil film bearing spinning machine, comprising a housing (1), a hollow shaft (2), a steel inlet (3), a spinning head (4), a spinning pipe (5) and an oil film bearing (6), wherein a hollow shaft (2) is arranged inside the housing (1), one end of the hollow shaft (2) is rotatably connected to the housing (1) through a rolling bearing and extends outward to install the steel inlet (3), the other end of the hollow shaft (2) is rotatably connected to the housing (1) through the oil film bearing (6) and extends outward to install the spinning head (4), the spinning pipe (5) is spirally installed on the spinning head (4) and is connected to the steel inlet (3) through the interior of the hollow shaft (2), and is characterized in that: The spinning machine further comprises a rotor (7) and a stator (8); a first oil storage tank (6-2) is provided at the end of the oil film bearing (6); the first oil storage tank (6-2) is processed with an oil discharge channel and is connected to the inner side of the bearing sleeve of the oil film bearing (6); a first oil nozzle (1-1) is installed at a position corresponding to the notch of the first oil storage tank (6-2) inside the box (1); the rotor (7) is coaxially positioned and installed outside the middle position of the hollow shaft (2); a plurality of permanent magnets (7-1) are provided on the outer side of the rotor (7) along the circumferential direction; a second oil storage tank (7-2) is provided at the end of the rotor (7); and the rotor ( 7) A plurality of oblique through holes (7-3) are provided at the middle position along the circumferential direction, and the plurality of oblique through holes (7-3) are all connected to the second oil storage tank (7-2). A second oil nozzle (1-2) is installed at a position corresponding to the slot of the second oil storage tank (7-2) inside the box (1). The stator (8) is coaxially spaced and sleeved on the outside of the rotor (7) and is fixedly connected to the box (1). An induction coil (8-1) is provided on the inside of the stator (8) along the circumferential direction, and an oil chamber (8-2) is provided on the outside of the stator (8). The oil chamber (8-2) is connected to an oil inlet hole (8-3) and an oil outlet hole (8-4).

2. The main shaft directly driven full oil cooling oil film bearing laying head according to claim 1, characterized in that: The oil film bearing (6), rotor (7) and stator (8) use the same external oil supply system.

3. A main shaft directly driven full oil cooling oil film bearing laying head according to claim 1 or 2, characterized in that: The oil film bearing (6) is connected to the outer side of the bearing sleeve and an oil supply hole (6-1) is provided.

4. The main shaft directly driven full oil cooling oil film bearing laying head according to claim 2, characterized in that: The rolling bearings are lubricated and cooled by the same external oil supply system.

5. The main shaft directly driven full oil cooling oil film bearing laying head according to claim 1, characterized in that: The first oil storage tank (6-2) and the second oil storage tank (7-2) are both annular structures with L-shaped cross-sections.

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