A sand grinding regeneration machine based on a speed increasing disc

Abstract

The present invention discloses a sand grinding and regeneration machine based on a speed increasing disc, comprising a shell, wherein the upper end of the shell is a sand inlet, and the lower end is a sand outlet; a driving device is mounted on the outer side of the shell through a bracket, and a fixed flange shaft is arranged on the base inside the shell. The present invention has a simple structure, is easy to implement, and has a low cost; it solves the industry problems of high malfunction, poor regeneration effect, and short life of wearing parts of old sand regeneration equipment in the foundry industry. The rotating mechanism is fixed on the flange shaft through a bearing system, and the pulley is arranged between the two bearings. The oil delivered by the oil pump enters through the center hole of the main shaft, lubricates the bearings, and takes away heat at the same time, overflows to the oil tank through the oil return hole, and the lubricating oil is recycled after cooling. The thin oil cooling and lubrication system of the regeneration machine realizes the regeneration of old sand while it is hot, improves the demoulding rate of old sand, and improves the regeneration quality of old sand. At the same time, it solves the problem of high-temperature oil leakage in the regeneration machine, and realizes efficient and energy-saving regeneration of old sand.

Description

Technical Field

[0001] The invention belongs to the technical field of foundry sand regeneration, and more specifically, relates to a sand grinding regeneration machine based on a speed increasing disc. Background Art

[0002] In my country, self-hardening sand molding is widely used in foundries for sand molds and cores. Self-hardening sand casting has become a key process in the production of cast steel, cast iron, and cast aluminum. After resin sand is used, a large amount of resin binder remains in the old sand, requiring it to be regenerated through demolding equipment before it can be recycled. Because resin sand is inherently hygroscopic, it continuously absorbs heat during the cooling process of casting, effectively reducing moisture ingress. Therefore, regenerators must meet the requirements for hot regeneration. The existing old sand regeneration machine has an unreasonable structural design. The centrifugal disc or throwing disc only has a simple throwing and falling effect, and the regeneration effect is poor. Moreover, the existing structure is just the friction between the sand and the wear-resistant parts. The large-diameter centrifugal disc is difficult to be made of alloy or ceramic, and the life of the wearing parts is too short. In addition, the traditional vertical bearing system structure used for spindle rotation makes it difficult to solve the high-temperature oil leakage and frequent failures. It is impossible to achieve high-temperature regeneration of old sand. A large amount of new sand needs to be added to the regenerated sand. Some manufacturers have to discharge the excess chemically hardened sand as garbage, resulting in waste of resources and environmental pollution. The market urgently needs a regeneration equipment with reliable quality and stable performance to meet the green and intelligent transformation and upgrading of foundries. Summary of the Invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned background technology and provide a sand grinding regeneration machine based on a speed increasing disk, which solves the problems of high failure rate, poor regeneration effect and short life of wearing parts of old sand regeneration equipment in the foundry industry.

[0004] According to the technical solution provided by the present invention: a sand grinding and regeneration machine based on a speed increasing disk comprises a shell, the upper end of the shell is a sand inlet, and the lower end is a sand outlet; the outer side surface of the shell is provided with a driving device through a bracket, a fixed flange shaft is provided on the base inside the shell, a rotating part is installed on the fixed flange shaft, a connecting disk is installed on the upper part of the rotating part, a speed increasing disk is installed on the upper part of the connecting disk, a fixed retaining ring is sleeved on the outer periphery of the speed increasing disk, an inspection door is provided on the side wall of the shell, a cone bucket is provided below the sand inlet, a material flow plug is slidably installed on the lower end outlet of the cone bucket, and a dust suction port is provided on the side of the shell.

[0005] As a further improvement of the present invention, the fixed flange shaft is installed on the internal base of the shell, and the rotating part is sleeved on the outer periphery of the fixed flange shaft through a bearing group. The bearing group includes a first bearing and a second bearing. The inner ring of the first bearing is sleeved on the upper part of the outer periphery of the fixed flange shaft, and the outer ring is located at the upper center of the rotating part; the inner ring of the second bearing is sleeved on the middle and lower part of the outer periphery of the fixed flange shaft, and the outer ring is located at the lower center of the rotating part.

[0006] As a further improvement of the present invention, the driving device is a driving motor; the transmission structure includes a motor pulley and a pulley; the motor pulley is installed on the output shaft of the driving motor, and the pulley is sleeved on the middle part of the outer periphery of the fixed flange shaft, and the two are connected by a belt.

[0007] As a further improvement of the present invention, a tensioning structure is arranged between the driving motor and the bracket; the tensioning structure includes a motor mounting plate and a locking bolt, the motor is fixedly connected to the motor mounting plate, a tensioning support block is provided on the side of the motor mounting plate, an adjustment slot is opened on the motor mounting plate, a tensioning bolt mounting block is provided on the side of the bracket, a tensioning bolt is threadedly installed in the tensioning bolt mounting block, and a locking nut is fixedly provided in the bracket.

[0008] As a further improvement of the present invention, a speed increasing disc retaining ring is distributed on the upper surface of the speed increasing disc, a sand grain gap is opened on the speed increasing disc retaining ring, and a speed increasing disc outer retaining ring is provided on the outer periphery of the speed increasing disc retaining ring.

[0009] As a further improvement of the present invention, the fixed retaining ring includes an outer retaining ring, the lower end of the outer retaining ring is connected to the lower retaining ring, the middle part of the lower retaining ring is provided with a speed increaser installation notch, the upper end of the outer retaining ring is connected to the upper baffle, the upper end of the upper baffle is provided with a material filter orifice plate, a material filter orifice plate is provided below the material filter orifice plate, an inner retaining ring is provided horizontally on the inner periphery of the outer retaining ring; a support leg is provided at the lower end of the lower retaining ring; and a wear-resistant ring is provided on the inner periphery of the lower retaining ring.

[0010] As a further improvement of the present invention, a thin oil cooling and lubrication system is provided in the housing; the thin oil cooling and lubrication system includes an oil inlet hole and a first oil return hole; the oil inlet hole and the first oil return hole are both provided on the fixed flange shaft, the oil inlet end of the oil inlet hole is located at the bottom of the fixed flange shaft, and the oil outlet end of the oil inlet hole is located at the top of the fixed flange shaft; the oil return end of the first oil return hole is located at the lower part of the fixed flange shaft, below the second bearing, and the oil outlet end of the first oil return hole is located at the bottom of the fixed flange shaft.

[0011] As a further improvement of the present invention, a sealing ring is arranged between the fixed flange shaft and the rotating part, and a second oil return hole is provided on the fixed flange shaft. The oil return end of the second oil return hole is located below the sealing ring, and the oil outlet end is located at the bottom of the fixed flange shaft.

[0012] As a further improvement of the present invention, the sealing ring is sleeved on the outer periphery of the lower portion of the fixed flange shaft.

[0013] As a further improvement of the present invention, the speed increasing disc retaining ring is set with an increasing gradient of built-in and outer heights, the sand grain notches are set at the same angle, bolt bosses are evenly distributed on the inner circumference of the speed increasing disc retaining ring, and reinforcing ribs are set at the bottom of the speed increasing disc.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The present invention has a simple structure, is easy to implement, and has a low cost. It solves the industry problems of high malfunction, poor regeneration effect, and short life of wearing parts of old sand regeneration equipment in the foundry industry. The rotating mechanism is fixed on the flange shaft through a bearing system, and the pulley is set between the two bearings. The oil delivered by the oil pump enters through the center hole of the main shaft to lubricate the bearings and take away the heat at the same time. It overflows into the oil tank through the oil return hole, and the lubricating oil is recycled after cooling. The thin oil cooling and lubrication system of the regeneration machine realizes the regeneration of old sand while it is hot, improves the demoulding rate of old sand, and improves the regeneration quality of old sand. At the same time, it solves the problem of high-temperature oil leakage in the regeneration machine, and realizes efficient and energy-saving regeneration of old sand. The regeneration machine can be used in one stage or in two, three, or four stages in series. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the present invention.

[0017] Figure 2 It is a top view of the present invention.

[0018] Figure 3 It is a schematic diagram of the thin oil cooling and lubrication system of the present invention.

[0019] Figure 4 It is a front view of the solid speed increasing disk of the present invention.

[0020] Figure 5 It is a front view of the fixed retaining ring of the present invention. DETAILED DESCRIPTION

[0021] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1-5It includes a shell 1, a sand inlet 1-1, a sand outlet 1-2, a driving device 2, a rotating part 3, a connecting disc 5, a speed increasing disc 6, a speed increasing disc retaining ring 6-1, a sand gap 6-2, a speed increasing disc outer retaining ring 6-3, a fixed retaining ring 7, an outer retaining ring 7-1, a lower retaining ring 7-2, a speed increasing disc installation gap 7-3, an upper baffle 7-4, a material filter orifice 7-5, a feed hopper 7-6, an inner retaining ring 7-7, an inspection door 9, a cone bucket 10, a material flow plug plate 11, a dust suction port 12, a driving motor 13, a motor pulley 14, a belt 15, a sealing ring 16, a bracket 17, a motor mounting plate 18, a first bearing 19-1, a second bearing 19-2, a locking bolt 20, a sand outlet 21, etc.

[0023] like Figure 1-3 As shown, a sand grinding and regeneration device based on a labyrinth speed increasing disk includes a housing 1, which is a supporting frame. The upper end of the housing 1 is a sand inlet 1-1, and the lower end is a sand outlet 1-2.

[0024] The driving device 2 is installed on the outer side of the shell 1 through the bracket 17, and a fixed flange shaft 4 is provided on the base inside the shell 1, and a rotating part 3 is installed on the fixed flange shaft 4. A connecting plate 5 is installed on the upper part of the rotating part 3, and a speed increasing plate 6 is installed on the upper part of the connecting plate 5. A fixed retaining ring 7 is sleeved on the outer periphery of the speed increasing plate 6. The driving device 2 drives the rotating part 3, the connecting plate 5, and the speed increasing plate 6 to rotate at high speed in sequence through the transmission structure.

[0025] An inspection door 9 is provided on the side wall of the shell 1, and a cone bucket 10 is provided below the sand inlet 1-1. A material flow plug plate 11 is slidably installed at the discharge port at the lower end of the cone bucket 10. The material flow plug plate 11 can be manually adjusted to control the size of the discharge port, thereby adjusting the material flow. A dust suction port 12 is provided on the side of the shell 1, and the outer end of the dust suction port 12 is connected to the dust removal system to remove the resin binder dust peeled off from the outer layer of the resin sand during the regeneration process.

[0026] The fixed flange shaft 4 is mounted on the base inside the housing 1. The rotating member 3 is mounted on the outer periphery of the fixed flange shaft 4 via a bearing assembly. The bearing assembly includes a first bearing 19-1 and a second bearing 19-2. The inner ring of the first bearing 19-1 is mounted on the upper periphery of the fixed flange shaft 4, and the outer ring is located at the upper center of the rotating member 3. The inner ring of the second bearing 19-2 is mounted on the lower middle periphery of the fixed flange shaft 4, and the outer ring is located at the lower center of the rotating member 3.

[0027] The driving device includes a driving motor 13 .

[0028] The transmission structure includes a motor pulley 14 and a pulley 3-1. The motor pulley 14 is mounted on the output shaft of the drive motor 13, and the pulley 3-1 is sleeved on the middle part of the outer periphery of the fixed flange shaft 4, and the two are connected by a belt 15.

[0029] Belt 15 is outer-mounted with a belt cover to prevent sand from entering.

[0030] In order to achieve tensioning of the belt 15 , a tensioning structure is provided between the drive motor 13 and the bracket 17 .

[0031] The tensioning structure includes a motor mounting plate 18 and a locking bolt 20. The motor 13 is fixedly connected to the motor mounting plate 18. A tensioning support block 18-1 is provided on the side of the motor mounting plate 18. An adjustment slot 18-2 is opened on the motor mounting plate 18. A tensioning bolt mounting block 17-1 is provided on the side of the bracket 17. The tensioning bolt 17-2 is threadedly installed in the tensioning bolt mounting block 17-1. The bottom of the tensioning bolt 17-2 is against the tensioning support block 18-1. A locking nut is fixedly provided in the bracket 17. The locking bolt 20 passes through the adjustment slot 18-2 and is connected to the locking nut.

[0032] When the belt 15 needs to be tightened, the tightening bolt 17 - 2 is rotated, and the bottom of the tightening bolt 17 - 2 pushes the motor mounting plate 18 to move, thereby increasing the distance between the motor 13 and the rotating part 3. After the tightening is completed, the locking bolt 20 is rotated so that the head of the locking bolt 20 presses the motor mounting plate 18, thereby completing the fixation of the motor 13 and the bracket 17.

[0033] like Figure 4 As shown, the speed-increasing disk 6 is a labyrinth. The top surface of the speed-increasing disk 6 is annularly distributed with several speed-increasing disk retaining rings 6-1, centered at the origin. Each speed-increasing disk retaining ring 6-1 has several sand-like notches 6-2. An outer speed-increasing disk retaining ring 6-3 is provided on the outer periphery of the speed-increasing disk retaining ring 6-1. The outer speed-increasing disk retaining ring 6-3 can be notched or unnotched.

[0034] Several speed increasing disc retaining rings 6-1 are arranged with increasing gradient from inner to outer height, and the sand grain gaps 6-2 are arranged at the same angle, so that the resin sand can move to the outer layer after each layer is fully accelerated.

[0035] Bolt bosses 6 - 4 are evenly distributed on the inner circumference of the speed increasing disk retaining ring 6 - 1 , and connecting bolts are installed in the bolt bosses 6 - 4 to achieve the connection between the speed increasing disk 6 and the connecting disk 5 .

[0036] The arrangement of the bolt boss 6-4 can firstly reduce the thickness of the speed increasing plate 6 and thus reduce the cost, and secondly protect the bolts from being worn by the resin sand. Otherwise, bolt counterbores must be provided on the upper surface of the speed increasing plate 6, which will inevitably increase the thickness of the speed increasing plate 6.

[0037] The surface of the speed increasing disk 6 is concave and gradually increases from the center to the periphery. Sand particles fall into the central area of the speed increasing disk 6 and are then accelerated by the speed increasing disk 6, thus obtaining greater kinetic energy.

[0038] In order to extend the service life of the speed increasing disk 6 , the speed increasing disk 6 is made of a wear-resistant material.

[0039] In order to enhance the structural strength of the speed increasing disk 6 , reinforcing ribs are provided at the bottom of the speed increasing disk 6 .

[0040] like Figure 5 As shown, the fixed retaining ring 7 includes an outer retaining ring 7-1, the lower end of the outer retaining ring 7-1 is connected to the lower retaining ring 7-2, the middle of the lower retaining ring 7-2 is provided with a speed increaser installation notch 7-3, the upper end of the outer retaining ring 7-1 is connected to the upper baffle 7-4, the upper end of the upper baffle 7-4 is installed with a material filter orifice plate 7-5, and a material hopper 7-6 is provided below the material filter orifice plate 7-5. Several inner retaining rings 7-7 are horizontally provided on the inner periphery of the outer retaining ring 7-1.

[0041] The lower end of the lower retaining ring 7-2 is installed with a support leg 7-8, which is installed in the shell 1. The support leg 7-8 has a height adjustment function, which is achieved through a pin or a threaded structure.

[0042] The speed increasing disc 6 is located in the speed increasing disc installation gap 7 - 3 , and the outer diameter of the speed increasing disc 6 is smaller than the inner diameter of the speed increasing disc installation gap 7 - 3 , and the gap between the two is the sand outlet 21 .

[0043] A wear-resistant ring 7-9 is installed on the inner periphery of the lower retaining ring 7-2.

[0044] Housing 1 is equipped with a thin oil cooling and lubrication system, which includes an oil inlet 4-1 and a first oil return hole 4-2. These are all located on the fixed flange shaft 4. The oil inlet of oil inlet 4-1 is located at the bottom of the fixed flange shaft 4 and is connected to the lubricating oil tank via an oil pipe. The oil outlet of oil inlet 4-1 is located at the top of the fixed flange shaft 4. The oil return of first oil return hole 4-2 is located at the bottom of the fixed flange shaft 4, below the second bearing 19-2. The oil outlet of first oil return hole 4-2 is located at the bottom of the fixed flange shaft 4 and is connected to the lubricating oil tank via an oil pipe.

[0045] In order to prevent the leakage of lubricating oil, a sealing ring 16 is provided between the fixed flange shaft 4 and the rotating member 3 . The sealing ring 16 is sleeved on the outer periphery of the lower portion of the fixed flange shaft 4 .

[0046] Although the sealing ring 16 is set, a small amount of lubricating oil still remains along the fixed flange shaft 4. In order to recover this part of the lubricating oil, the return oil end of the second oil return hole 4-3 is located below the sealing ring 16, and the oil outlet end is located at the bottom of the fixed flange shaft 4, and is connected to the lubricating oil tank through an oil pipe.

[0047] The lubricating oil is recycled after cooling.

[0048] The installation process of the present invention is as follows:

[0049] A large amount of old sand wrapped with resin binder enters the shell 1 from the cone bucket 10 and falls onto the material filter plate 7-5. The material filter plate 7-5 filters out the large particles of old sand, and the filtered residue can be manually taken out through the inspection door 9.

[0050] The old sand continues to fall, is collected by the feed hopper 7-6, and falls into the middle area of the speed increasing disk 6. The speed increasing disk 6 is fixed on the coupling disk 5, which is mounted on the rotating member 3. The pulley 3-1 drives the coupling disk 5 and the speed increasing disk 6 to rotate, and the belt 15 drives the rotation through the driving device 2.

[0051] like Figure 1 、 Figure 4 As shown, the speed-increasing disk 6 and the fixed retaining ring 7 form relative motion, and the old sand falls into the middle area of the speed-increasing disk 6. Before being ejected, it rotates in an arc in the speed-increasing disk retaining ring 6-1 to gain kinetic energy. The broken line maze structure on the surface of the speed-increasing disk 6 ensures that the old sand can absorb centrifugal energy and accelerate while continuously expanding the acceleration circle under the action of centrifugal force. Finally, it is ejected at high speed and collides with the waterfall-like sand flow formed by the fixed retaining ring 7. This causes strong friction between the sand and the inert mold on the surface of the old sand to fall off. After the collision, it falls to the speed-increasing disk 6 below due to its own weight. The old sand is ejected a second time and rubs against the waterfall-like sand flow again. In the initial state, the old sand falls onto the inner retaining ring 7-7 and the lower retaining ring 7-2. The subsequent old sand is continuously pushed and gradually piled up on the inner wall of the outer retaining ring 7-1, forming a repose angle. The space inside the fixed retaining ring 7, excluding the repose angle, is the waterfall material flow area. The angle of repose is divided into a static angle of repose region and a dynamic angle of repose region. The static angle of repose region is located outside the dynamic angle of repose region, closer to the inner wall of the outer retaining ring 7-1. The old sand in the static angle of repose region does not come into contact with the sand splashing from the cascading sand flow region, and its movement is minimal, subjecting it only to the axial centrifugal force of the splashing old sand. The old sand in the dynamic angle of repose region directly and rubs against the sand splashing from the cascading sand flow region, constantly exchanging and shifting significantly. This friction causes the inert resin binder on the old sand's surface to fall off. The reflected sand then falls onto the rapidly rotating speed-increasing disk 6, creating effective sand-to-sand friction release.

[0052] The old sand is finally discharged through the sand outlet 21. When the old sand passes through the sand outlet 21, the high-speed rotation of the speed increasing disk 6 pushes the old sand and the old sand, and the old sand and the wear-resistant rings 7-9 to squeeze and rub against each other at high speed, thereby achieving further demoulding.

Claims

1. A sand grinding and regeneration machine based on a speed increasing disc, characterized in that: The regenerator comprises a housing (1), the upper end of the housing (1) is a sand inlet (1-1), and the lower end is a sand outlet (1-2); a driving device (2) is mounted on the outer side of the housing (1) via a bracket (17); a fixed flange shaft (4) is provided on the inner base of the housing (1); a rotating member (3) is mounted on the fixed flange shaft (4); a coupling disc (5) is mounted on the upper part of the rotating member (3); a speed increasing disc (6) is mounted on the upper part of the coupling disc (5); a fixed retaining ring (7) is sleeved on the outer periphery of the speed increasing disc (6); The housing (1) is provided with an inspection door (9) on the side wall, a cone bucket (10) is provided below the sand inlet (1-1), a material flow plug plate (11) is slidably installed at the lower end discharge port of the cone bucket (10), and a dust suction port (12) is provided on the side of the housing (1); the fixed retaining ring (7) includes an outer retaining ring (7-1), the lower end of the outer retaining ring (7-1) is connected to the lower retaining ring (7-2), the middle of the lower retaining ring (7-2) is provided with a speed increasing disc installation notch (7-3), the upper end of the outer retaining ring (7-1) is connected to the upper retaining plate (7-1), and the lower retaining ring (7-2) is provided with a speed increasing disc installation notch (7-3). 4), a material filter plate (7-5) is installed at the upper end of the upper baffle (7-4), a material feed hopper (7-6) is provided below the material filter plate (7-5), a plurality of inner retaining rings (7-7) are provided horizontally on the inner periphery of the outer retaining ring (7-1); a support leg (7-8) is installed at the lower end of the lower retaining ring (7-2); a wear-resistant ring (7-9) is installed on the inner periphery of the lower retaining ring (7-2); a speed increasing disc (6) is located in the speed increasing disc installation notch (7-3), the outer diameter of the speed increasing disc (6) is smaller than the inner diameter of the speed increasing disc installation notch (7-3), and the two are The gap between the two is a sand outlet (21); a speed-increasing disc retaining ring (6-1) is distributed on the upper surface of the speed-increasing disc (6), a sand notch (6-2) is opened on the speed-increasing disc retaining ring (6-1), and a speed-increasing disc outer retaining ring (6-3) is provided on the outer periphery of the speed-increasing disc retaining ring (6-1); the speed-increasing disc retaining ring (6-1) is arranged with a height increasing gradient from the inside to the outside, the sand notch (6-2) is arranged at the same angle, bolt bosses (6-4) are evenly distributed on the inner periphery of the speed-increasing disc retaining ring (6-1), and reinforcing ribs are provided on the bottom of the speed-increasing disc (6).

2. The sanding regenerator based on the speed increasing disk according to claim 1, characterized in that: The fixed flange shaft (4) is mounted on the inner base of the housing (1), and the rotating member (3) is sleeved on the outer periphery of the fixed flange shaft (4) through a bearing group, wherein the bearing group comprises a first bearing (19-1) and a second bearing (19-2), wherein the inner ring of the first bearing (19-1) is sleeved on the upper part of the outer periphery of the fixed flange shaft (4), and the outer ring is located at the upper center of the rotating member (3); the inner ring of the second bearing (19-2) is sleeved on the middle and lower part of the outer periphery of the fixed flange shaft (4), and the outer ring is located at the lower center of the rotating member (3).

3. The sanding regenerator based on a speed increasing disk according to claim 1, characterized in that: The driving device is a driving motor (13); the transmission structure includes a motor pulley (14) and a pulley (3-1); the motor pulley (14) is mounted on the output shaft of the driving motor (13), and the pulley (3-1) is sleeved on the middle part of the outer periphery of the fixed flange shaft (4), and the two are connected by a belt (15).

4. The sand grinding and regenerating machine based on the speed increasing disk according to claim 3, characterized in that: A tensioning structure is provided between the drive motor (13) and the bracket (17); the tensioning structure comprises a motor mounting plate (18) and a locking bolt (20); the drive motor (13) is fixedly connected to the motor mounting plate (18); a tensioning support block (18-1) is provided on the side of the motor mounting plate (18); an adjustment slot (18-2) is provided on the motor mounting plate (18); a tensioning bolt mounting block (17-1) is provided on the side of the bracket (17); a tensioning bolt (17-2) is threadedly installed in the tensioning bolt mounting block (17-1); and a locking nut is fixedly provided in the bracket (17).

5. The sanding regenerating machine based on a speed increasing disk as claimed in claim 2, characterized in that: A thin oil cooling and lubrication system is provided in the housing (1); the thin oil cooling and lubrication system comprises an oil inlet hole (4-1) and a first oil return hole (4-2); the oil inlet hole (4-1) and the first oil return hole (4-2) are both provided on the fixed flange shaft (4); the oil inlet end of the oil inlet hole (4-1) is located at the bottom of the fixed flange shaft (4), and the oil outlet end of the oil inlet hole (4-1) is located at the top of the fixed flange shaft (4); the oil return end of the first oil return hole (4-2) is located at the lower part of the fixed flange shaft (4), below the second bearing (19-2), and the oil outlet end of the first oil return hole (4-2) is located at the bottom of the fixed flange shaft (4).

6. The sanding regenerator based on a speed increasing disk according to claim 5, characterized in that: A sealing ring (16) is provided between the fixed flange shaft (4) and the rotating member (3), and a second oil return hole (4-3) is provided on the fixed flange shaft (4). The oil return end of the second oil return hole (4-3) is located below the sealing ring (16), and the oil outlet end is located at the bottom of the fixed flange shaft (4).

7. The sanding regenerator based on a speed increasing disk according to claim 6, characterized in that: The sealing ring (16) is sleeved on the outer periphery of the lower portion of the fixed flange shaft (4).

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