A wind power speed increasing box sealing structure

Abstract

The present invention is applicable to the technical field of transmission devices, and provides a sealing structure of a wind power speed increaser, comprising a gear set, a left end cover and a right end cover, wherein the gear set comprises a sun gear, a planetary gear and an outer gear ring, the sun gear is connected to an output shaft, the planetary gear is connected to an input shaft, the output shaft and the input shaft are connected to the end covers through bearings, an oil retaining ring is provided on the side of the bearing facing the gear set, the left end cover and the right end cover are connected to the outer gear ring through a plurality of bolts, the left end cover and the right end cover are both provided with adsorption components, two adsorption cavities are correspondingly provided on both sides of the outer gear ring, an extrusion component is provided on the outer gear ring, the extrusion component squeezes the adsorption component to form a negative pressure in the adsorption cavity, the device solves the problem of sealing ring wear, the end cover and the outer gear ring are pressed together by the negative pressure in the adsorption cavity, the relative vibration of the end cover and the outer gear ring is reduced, the sealing performance is improved, and the service life of the sealing ring is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission devices, and more specifically, to a sealing structure of a wind power speed increasing box. Background Art

[0002] Wind power speed increaser is mainly used in wind turbines, usually with a planetary gearbox structure to reduce the torque input to the generator and increase the transmission speed. It has the advantages of small size, high load capacity, stable operation and low noise. The overall power of the wind power speed increaser is large, and its lubrication requirements are high. However, due to maintenance costs, it is not possible to frequently add lubricating oil, making it particularly important to improve its overall sealing and reduce oil leakage.

[0003] Special-shaped sealing rings have high sealing performance because they are provided with extended protrusions in all directions. When used on flanges, they can provide extrusion deformation capacity in multiple directions when the flange vibrates, thereby reducing leakage. However, there are frequent vibrations during the operation of wind power speed increaser. When used for a long time, the sealing ring is easy to wear, which eventually leads to noise and leakage.

[0004] In order to avoid seal failure caused by vibration during operation, the speed increasers on the market are usually equipped with a wear compensation mechanism on the sealing ring. The wear compensation mechanism is composed of elastic components such as springs. Through the elastic force of the elastic components, when the sealing ring is worn, the sealing ring can always be pressed against the flange, thereby extending the service life of the sealing ring. However, the wear of the sealing ring cannot be avoided. When used for a long time, the sealing ring needs to be checked and replaced regularly. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a wind power speed increaser box sealing structure with lower seal ring wear and better sealing effect.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A wind power speed increaser sealing structure, comprising a gear set, with a left end cover and a right end cover respectively fixed on both sides of the gear set, the gear set comprising a sun gear, a planetary gear and an outer gear ring, the sun gear is connected to an output shaft, the planetary gear is connected to an input shaft, the output shaft and the connection between the input shaft and the end cover are both equipped with bearings, forming the basic structure of the wind power speed increaser, the bearing is provided with an oil retainer ring on the side facing the gear set, and the oil retainer ring can prevent oil from overflowing from the bearing when splashing;

[0008] The left end cover and the right end cover are connected to the outer gear ring through a plurality of bolts. The left end cover and the right end cover are both provided with adsorption components. Two adsorption cavities are correspondingly provided on both sides of the outer gear ring. The outer gear ring is provided with an extrusion component. The extrusion component squeezes the adsorption component to form a negative pressure in the adsorption cavity, so that the left end cover and the right end cover are respectively pressed against the outer gear ring from both sides, and the relative vibration between the three is reduced by improving the connection strength between the end cover and the outer gear ring, thereby reducing the relative movement between the end cover and the outer gear ring, reducing the wear of the sealing ring, and extending the service life of the sealing ring while improving the sealing performance.

[0009] The present invention is further configured as follows: the adsorption assembly includes an airbag, the left end cover and the right end cover are both provided with a receiving groove, the receiving groove and the adsorption chamber are in an annular shape and are arranged opposite to each other, the airbag is annular, one end of the airbag is fixed in the receiving groove, when the end cover is connected to the outer gear ring, the other end of the airbag is in contact with the inner wall of the adsorption chamber, that is, there is only a small amount of air between the airbag and the adsorption chamber;

[0010] One end of the airbag in the accommodating groove is connected to exhaust pipe 1, and the two adsorption chambers are commonly connected to exhaust pipe 2. Both exhaust pipe 1 and exhaust pipe 2 are connected to a one-way valve, and the air inlet side of the one-way valve faces the airbag. The output end of the extrusion assembly is connected to one end of the airbag in the adsorption chamber. When the end cover is installed, the air in the adsorption chamber is discharged by the one-way valve. When the extrusion assembly squeezes the airbag, the air in the airbag is discharged by the corresponding one-way valve. The space in the adsorption chamber is expanded and air cannot be replenished through the corresponding one-way valve, thereby forming a negative pressure in the adsorption chamber, pressing the end cover against the outer gear ring.

[0011] The further configuration is as follows: the plug of the one-way valve is in a cone shape, the small end of the plug is sealed with the valve port, a clearance is provided between the side wall of the plug and the side wall of the valve port, a plurality of adsorption rings are provided around the side wall of the plug, the plurality of adsorption rings are arranged at intervals, the adsorption rings extend to one side of the valve port, the adsorption rings are sealed with the side wall of the valve port, and the effective area of ​​the external air pressure is increased by arranging multiple layers of adsorption rings, thereby increasing the extrusion force on the plug and improving the sealing effect of the one-way valve, and there is a product tolerance when the side wall of the plug is directly attached to the side wall of the valve port, while in the present application, extrusion deformation will occur between the flexible adsorption ring and the side wall of the valve port during sealing, and the sealing effect is better; at the same time, there is a clearance between the side wall of the plug and the side wall of the valve port, which is convenient for prying out the plug during disassembly.

[0012] It is further configured as follows: a plurality of protrusions and depressions are provided on the side wall of the outer gear ring, a plurality of depressions and protrusions are correspondingly provided on the left end cover and the right end cover, sealing rings are provided in the depressions and protrusions, the sealing rings are sealed with the outer gear ring, and a plurality of the sealing rings are provided on both sides of the adsorption chamber. The sealing rings improve the overall sealing effect of the speed increaser while preventing air from being replenished into the adsorption chamber from both sides, thereby ensuring the existence of negative pressure in the adsorption chamber.

[0013] The present invention is further configured as follows: the extrusion assembly includes a plurality of slide grooves, the slide grooves are arranged along the radial direction of the outer gear ring, a linkage rod is slidably connected in the slide groove, one end of the linkage rod facing the inner side of the outer gear ring is movably connected to two push rods, the two push rods are arranged on both sides of the linkage rod, the other ends of the two push rods extend into the adsorption chambers on the corresponding sides respectively, one end of all the push rods on the same side in the adsorption chamber is commonly connected to a push ring, and the other end of the push ring is connected to the adsorption assembly;

[0014] The slide groove and the bolt hole of the corresponding bolt are arranged perpendicular to each other, the end of the linkage rod facing the outer side of the outer gear ring is wedge-shaped, the wedge-shaped end of the linkage rod can extend into the bolt hole, the bolt is slidably connected with the wedge-shaped surface of the linkage rod, the other end of the linkage rod is triangular, the triangular tip of the linkage rod faces the inner side of the outer gear ring, the two triangular inclined surfaces of the linkage rod are symmetrically arranged, and the two push rods are slidably connected with the two inclined surfaces respectively;

[0015] When installing the bolts, the bolts push the linkage rod inward, thereby driving the push rods on both sides to move into the adsorption chamber. The push rods squeeze the airbags. When all the bolts are installed in place, all the push rods are squeezed to both sides, and the push rings are symmetrically stressed, which can squeeze the airbags evenly toward one side of the end cover, ensuring that each point on the end cover and the outer gear ring is stressed evenly, avoiding deformation, and thus improving the sealing performance.

[0016] The present invention is further configured as follows: the oil retaining ring includes a mounting ring, the mounting ring is clamped between the bearing and the corresponding end cover, the mounting ring extends out of the bearing toward one end of the gear set and is connected with a retaining ring, and the retaining ring extends obliquely toward one side of the axis of the gear set;

[0017] The oil retaining ring is formed by splicing two semicircular rings, and the mounting ring and retaining ring are both formed by splicing two semicircular rings. An oil collecting groove is provided on the lower semicircular ring, and the oil collecting groove is provided on the side of the oil retaining ring facing the bearing, and an oil return hole is provided through the lowest point of the oil collecting groove;

[0018] The oil retaining ring is configured in a spliced ​​shape for easy installation. The oil blocked in the upper half of the ring will drip downward along the retaining ring, while the oil accumulated in the lower half of the ring will enter the oil collecting tank along the retaining ring and finally return to the oil tank of the speed increaser through the oil return hole, thereby preventing oil leakage from the bearing.

[0019] It is further configured that: a mechanical seal is provided between the output shaft and the input shaft and the corresponding left end cover and right end cover.

[0020] The advantages of the present invention are:

[0021] 1. An adsorption assembly is arranged between the end cover and the outer gear ring. When the end cover and the outer gear ring are engaged, the airbag is clamped into the adsorption chamber to squeeze out the air in the adsorption chamber. When the bolt is installed, the extrusion assembly squeezes the airbag out of the adsorption chamber, thereby forming a negative pressure in the adsorption chamber, pressing the end cover and the outer gear ring against each other, thereby improving the connection strength between the end cover and the outer gear ring, reducing their relative vibration, thereby reducing the wear of the sealing ring at the connection, extending the service life of the sealing ring and improving the overall sealing performance;

[0022] 2. A clearance is provided between the side wall of the plug of the one-way valve and the side wall of the valve port. A plurality of adsorption rings are provided on the side wall of the plug. The adsorption rings are sealed with the side wall of the valve port. The adsorption rings increase the air pressure action area, increase the pressure between the plug and the valve port, improve the sealing effect of the one-way valve, ensure the stability of the negative pressure in the adsorption chamber, and thus ensure the sealing effect;

[0023] 3. An oil retaining ring is arranged between the bearing and the end cover. Through the inclined structure of the retaining ring, the oil falling on the retaining ring will drip along the retaining ring, and the oil falling in the retaining ring will be collected in the oil collecting groove along the ring wall, and finally returned to the oil pool of the speed increaser through the oil return hole, thereby avoiding oil leakage from the bearing and improving the overall sealing of the speed increaser. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0025] Figure 2 For along Figure 1 The AA line section is shown;

[0026] Figure 3 for Figure 2 Schematic diagram of the structure when the bolts are not installed;

[0027] Figure 4 for Figure 1 An enlarged view of section C is shown;

[0028] Figure 5 for Figure 2 An enlarged view of part D is shown;

[0029] Figure 6 for Figure 3 An enlarged view of part F is shown;

[0030] Figure 7 for Figure 2 An enlarged view of part E is shown;

[0031] Figure 8 For along Figure 1 The BB line cross section is shown;

[0032] Fig. 9 for Figure 8 An enlarged view of section G is shown;

[0033] In the figure: 1. left end cover; 2. right end cover; 3. output shaft; 31. bearing; 4. input shaft; 5. gear set; 51. sun gear; 52. planetary gear; 53. outer ring gear; 6. extrusion assembly; 61. slide groove; 62. linkage rod; 63. push rod; 64. push ring; 7. adsorption assembly; 71. air bag; 72. adsorption chamber; 73. accommodating groove; 74. exhaust pipe one; 75. exhaust pipe two; 76. one-way valve; 761. plug; 762. adsorption ring; 8. bolt; 9. oil retaining ring; 91. mounting ring; 92. retaining ring; 93. oil collecting groove; 94. oil return hole; 10. sealing ring. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] See also Figure 1-Figure 9 , the present invention provides the following technical solutions:

[0036] A wind power speed increasing box sealing structure includes a gear set 5, the gear set 5 includes a sun gear 51, a planetary gear 52 and an outer gear ring 53, the sun gear 51 is connected to an output shaft 3, the planetary gear 52 is connected to an input shaft 4, a left end cover 1 and a right end cover 2 are respectively fixed on both sides of the outer gear ring 53, the left end cover 1 and the right end cover 2 are connected to the outer gear ring 53 through a plurality of bolts 8, and bearings 31 are installed at the connection between the output shaft 3 and the input shaft 4 and the end covers, forming the overall structure of the speed increasing box;

[0037] An oil retaining ring 9 is provided on the side of the bearing 31 facing the gear set 5. The oil splashing during the operation of the gear set 5 is blocked and collected by the oil retaining ring 9, thereby preventing the oil from leaking from the bearing 31 and improving the overall sealing of the speed increaser.

[0038] Both the left end cover 1 and the right end cover 2 are provided with an adsorption assembly 7, and two adsorption chambers 72 are correspondingly opened on both sides of the outer gear ring 53. When the end cover is installed, the adsorption assembly 7 squeezes the adsorption chamber 72 and discharges the air in the adsorption chamber 72. The outer gear ring 53 is provided with an extrusion assembly 6. After the air in the adsorption chamber 72 is discharged, the extrusion assembly 6 squeezes the adsorption assembly 7 out of the adsorption chamber 72, thereby forming a negative pressure in the adsorption chamber 72, so that the end cover and the outer gear ring 53 are pressed together, thereby improving the connection strength between the end cover and the outer gear ring 53, reducing the occurrence of relative vibration, reducing the friction between the end cover and the outer gear ring 53, reducing the occurrence of wear, and improving the sealing effect.

[0039] The adsorption assembly 7 includes an airbag 71. The left end cover 1 and the right end cover 2 are both provided with a receiving groove 73. The receiving groove 73 and the adsorption chamber 72 are arranged in an annular shape opposite to each other. The airbag 71 is also annular. One end of the airbag 71 is fixed in the receiving groove 73. The other end of the airbag 71 can fit with the inner wall of the adsorption chamber 72. When the end cover is installed, the airbag 71 is snapped into the adsorption chamber 72 until the airbag 71 is squeezed and fits with the inner wall of the adsorption chamber 72. At this time, the airbag 71 discharges the gas in the adsorption chamber 72, and there is almost no air in the adsorption chamber 72.

[0040] One end of the airbag 71 in the accommodating groove 73 is connected to an exhaust pipe 1 74, and the two adsorption chambers 72 are commonly connected to an exhaust pipe 2 75. The exhaust pipe 1 74 and the exhaust pipe 2 75 are both connected to a one-way valve 76, and the air inlet side of the one-way valve 76 faces the airbag 71. When the adsorption chamber 72 is squeezed and the airbag 71 is squeezed, the gas therein is discharged through the one-way valve 76 on the corresponding side.

[0041] The output end of the extrusion component 6 is connected to one end of the airbag 71 in the adsorption chamber 72. The extrusion component 6 can squeeze the airbag 71 toward one side of the accommodating groove 73. At this time, the gas in the airbag 73 is discharged, and the internal volume of the adsorption chamber 72 increases while the air pressure decreases, forming a negative pressure that is almost a vacuum, thereby pressing the end cover and the outer gear ring 53 together, improving the sealing between the end cover and the outer gear ring 53, and at the same time increasing the connection strength between the end cover and the outer gear ring 53, reducing the occurrence of relative vibration, reducing the wear of the structure between the connecting surfaces, extending the service life and improving the sealing effect.

[0042] Furthermore, the plug 761 of the one-way valve 76 is in a frustum shape. Under the action of air pressure, the small end of the plug 761 is pressed tightly against the valve port and sealed. A clearance is provided between the side wall of the plug 761 and the side wall of the valve port. A plurality of adsorption rings 762 are provided around the side wall of the plug 761. The plurality of adsorption rings 762 are arranged at intervals. The adsorption rings 762 extend toward one side of the valve port. Under the action of air pressure, the adsorption rings 762 are sealed against the side wall of the valve port. The adsorption rings 762 increase the action area of ​​the external air pressure, thereby increasing the pressure acting on the plug 761, thereby improving the sealing effect.

[0043] The adsorption ring 762 is made of a flexible material such as rubber, and will be deformed to a certain extent when subjected to external pressure and the blocking effect of the side wall of the valve port, thereby pressing the side wall of the valve port. Compared with the setting in which the side wall of the plug 761 fits the side wall of the valve port in the conventional design, the adsorption ring 762 will not produce a fine air passage due to production tolerance, thereby improving the sealing effect of the plug 761;

[0044] At the same time, when the adsorption ring 762 is pressed and deformed against the side wall of the valve port, a margin is provided for a slight movement of the plug 761. That is, when the plug 761 undergoes a slight displacement due to vibration, the adsorption ring 762 can always be tightly attached to the side wall of the valve port due to the deformation, thereby ensuring the sealing effect and preventing gas leakage from occurring at the one-way valve 76. The negative pressure in the adsorption chamber 72 is maintained, thereby ensuring the function of the adsorption component 7.

[0045] A plurality of protrusions and depressions are arranged on the side wall of the outer gear ring 53, and a plurality of depressions and protrusions are correspondingly arranged on the left end cover 1 and the right end cover 2. Sealing rings 10 are arranged in the depressions and protrusions, and the sealing rings 10 are sealed with the outer gear ring 53. A plurality of sealing rings 10 are arranged on both sides of the adsorption chamber 72, that is, when the end cover and the outer gear ring 53 are fixed, the sealing points of the sealing ring 10 on the end cover and the outer gear ring 53 are on both sides of the adsorption chamber 72, preventing gas from leaking from both sides of the adsorption chamber 72, thereby maintaining the negative pressure in the adsorption chamber 72, ensuring the function of the adsorption assembly 7, and cooperating with the adsorption assembly 7 to improve the overall sealing performance of the speed increaser.

[0046] The extrusion assembly 6 includes a plurality of slide grooves 61, which are arranged along the radial direction of the outer gear ring 53. The slide grooves 61 and the bolt holes of the corresponding bolts 8 are arranged perpendicular to each other. A linkage rod 62 is slidably connected in the slide grooves 61. The end of the linkage rod 62 facing the outer side of the outer gear ring 53 is wedge-shaped. The wedge-shaped end of the linkage rod 62 can extend into the bolt hole. When the bolt 8 is installed, it is slidably connected with the wedge-shaped surface of the linkage rod 62, so as to push the linkage rod 62 downward.

[0047] One end of the linkage rod 62 facing the inner side of the outer gear ring 53 is triangular, and the tip of the linkage rod 62 faces the inner side of the outer gear ring 53. The two triangular inclined surfaces of the linkage rod 62 are symmetrically arranged, and a push rod 63 is slidably connected to each of the two inclined surfaces of the linkage rod 62. The two push rods 63 are arranged on both sides of the linkage rod 62, and the other ends of the two push rods 63 extend into the adsorption chamber 72 on the corresponding side. All the push rods 63 on the same side are commonly connected to a push ring 64 at one end in the adsorption chamber 72, and the other end of the push ring 64 is connected to the adsorption assembly 7.

[0048] The linkage rod 62 and the push rod 63 are both provided with sealing rings to prevent external gas from entering the adsorption chamber 72 through the extrusion assembly 6;

[0049] When installing the end cover, the airbag 71 is squeezed into the adsorption chamber 72. When the gas in the adsorption chamber 72 is discharged, the airbag 71 squeezes the push ring 64 against the inner wall of the adsorption chamber 72, and the push rod 63 is pushed toward the direction of the linkage rod 62, so that the other end of the linkage rod 62 is squeezed into the bolt hole.

[0050] When the bolt 8 is installed, the bolt 8 squeezes the linkage rod 62 inward through the wedge-shaped end. When the linkage rod 62 moves inward, the push rods 63 on both sides are pushed into the adsorption chamber 72. The push rods 63 squeeze the airbag 71 through the push ring 64, so that the gas in the airbag 71 is discharged, and the adsorption chamber 72 expands to form a negative pressure.

[0051] When all the bolts 8 are installed, all the push rods 63 arrive at the same position, so that the push ring 64 squeezes the airbag 71 evenly, ensuring that the force at each point is even and improving the sealing performance.

[0052] The oil retaining ring 9 includes a mounting ring 91, which is clamped between the bearing 31 and the corresponding end cover. The mounting ring 91 extends out of the bearing 31 at one end toward the gear set 5, and is connected with a retaining ring 92. The retaining ring 92 extends obliquely toward the axis of the gear set 5. The mounting ring 91 and the retaining ring 92 are both formed by splicing two semicircular rings for easy installation. An oil collecting groove 93 is provided on the lower semicircular ring. The oil collecting groove 93 is provided on the side of the oil retaining ring 9 facing the bearing 31. An oil return hole 94 is provided through the lowest point of the oil collecting groove 93.

[0053] The oil falling on the upper retaining ring 92 will drip into the speed increaser oil pool along the retaining ring 92, while the oil falling in the lower retaining ring 92 will flow downward along the retaining ring 92 and accumulate in the oil collecting groove 93 at the bottom, and finally return to the speed increaser oil pool through the oil return hole 94, thereby avoiding oil leakage from the bearing 31.

[0054] Mechanical seals are provided between the output shaft 3 and the input shaft 4 and the corresponding left end cover 1 and right end cover 2 .

[0055] The working principle of the present invention is as follows:

[0056] An adsorption assembly 7 is provided between the end cover and the outer gear ring 53. When the end cover and the outer gear ring 53 are engaged, the airbag 71 is clamped into the adsorption chamber 72 to squeeze out the air in the adsorption chamber 72. When the bolt 8 is installed, the extrusion assembly 6 squeezes the airbag 71 out of the adsorption chamber 72, thereby forming a negative pressure in the adsorption chamber 72, pressing the end cover and the outer gear ring 53 against each other, improving the connection strength between the end cover and the outer gear ring 53, reducing their relative vibration, thereby reducing the wear of the sealing ring 10 at the connection, extending the service life of the sealing ring 10 and improving the overall sealing performance;

[0057] A clearance is provided between the side wall of the plug 761 of the one-way valve 76 and the side wall of the valve port. A plurality of adsorption rings 762 are provided around the side wall of the plug 761. The adsorption rings 762 are sealed with the side wall of the valve port. The adsorption rings 762 increase the air pressure action area, increase the pressure between the plug 761 and the valve port, improve the sealing effect of the one-way valve 76, ensure the stability of the negative pressure in the adsorption chamber 72, and thus ensure the sealing effect.

[0058] An oil retaining ring 9 is arranged between the bearing 31 and the end cover. Through the inclined structure of the retaining ring 92, the oil falling on the retaining ring 92 will drip along the retaining ring 92, and the oil falling in the retaining ring 2 will be collected in the oil collecting groove 93 along the ring wall, and finally returned to the oil pool of the speed increaser through the oil return hole 94, thereby avoiding oil leakage from the bearing 31 and improving the overall sealing of the speed increaser.

[0059] Obviously, the above-described embodiments are only a part of the embodiments of the present 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 creative work should fall within the scope of protection of the present invention.

[0060] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

Claims

1. A wind power speed increasing gearbox sealing structure, comprising a gear set (5), wherein a left end cover (1) and a right end cover (2) are respectively fixed on both sides of the gear set (5), characterized in that: The gear set (5) comprises a sun gear (51), planetary gears (52) and an outer gear ring (53); the sun gear (51) is connected to an output shaft (3); the planetary gears (52) are connected to an input shaft (4); bearings (31) are installed at the connection points between the output shaft (3) and the input shaft (4) and the end covers; an oil retaining ring (9) is provided on the side of the bearing (31) facing the gear set (5); the left end cover (1) and the right end cover (2) are connected to the outer gear ring (53) via a plurality of bolts (8); an adsorption assembly (7) is provided on the left end cover (1) and the right end cover (2); two adsorption chambers (72) are correspondingly provided on two sides of the outer gear ring (53); an extrusion assembly (6) is provided on the outer gear ring (53); the extrusion assembly (6) extrudes the adsorption assembly (7) so that negative pressure is formed in the adsorption chamber (72).

2. A wind power speed increasing gearbox sealing structure according to claim 1, characterized in that: The adsorption assembly (7) comprises an airbag (71). The left end cover (1) and the right end cover (2) are both provided with a receiving groove (73). The receiving groove (73) and the adsorption chamber (72) are arranged in an annular shape opposite to each other. The airbag (71) is annular. One end of the airbag (71) is fixed in the receiving groove (73). The other end of the airbag (71) is in contact with the inner wall of the adsorption chamber (72). One end of the airbag (71) in the receiving groove (73) is connected to an exhaust pipe 1 (74). The two adsorption chambers (72) are connected to an exhaust pipe 2 (75). Both the exhaust pipe 1 (74) and the exhaust pipe 2 (75) are connected to a one-way valve (76). The air inlet side of the one-way valve (76) faces the airbag (71). The output end of the extrusion assembly (6) is connected to one end of the airbag (71) in the adsorption chamber (72).

3. A wind power speed increasing gearbox sealing structure according to claim 2, characterized in that: The plug (761) of the one-way valve (76) is in a frustum shape, the small end of the plug (761) is sealed with the valve port, a clearance is provided between the side wall of the plug (761) and the side wall of the valve port, a plurality of adsorption rings (762) are provided around the side wall of the plug (761), the plurality of adsorption rings (762) are arranged at intervals, the adsorption rings (762) extend toward one side of the valve port, and the adsorption rings (762) are sealed with the side wall of the valve port.

4. A wind power speed increasing gearbox sealing structure according to claim 3, characterized in that: A plurality of protrusions and depressions are provided on the side wall of the outer gear ring (53), and a plurality of depressions and protrusions are correspondingly provided on the left end cover (1) and the right end cover (2). Sealing rings (10) are provided in the depressions and protrusions, and the sealing rings (10) are sealed with the outer gear ring (53). The plurality of sealing rings (10) are provided on both sides of the adsorption chamber (72).

5. A wind power speed increasing gearbox sealing structure according to claim 1, characterized in that: The extrusion assembly (6) comprises a plurality of slide grooves (61), wherein the slide grooves (61) are arranged along the radial direction of the outer gear ring (53), a linkage rod (62) is slidably connected in the slide grooves (61), and one end of the linkage rod (62) facing the inner side of the outer gear ring (53) is movably connected to two push rods (63), the two push rods (63) are arranged on both sides of the linkage rod (62), and the other ends of the two push rods (63) extend into the adsorption chamber (72) on the corresponding side respectively, and one end of all the push rods (63) on the same side in the adsorption chamber (72) is commonly connected to a push ring (64), and the other end of the push ring (64) is connected to the adsorption assembly (7).

6. A wind power speed increasing gearbox sealing structure according to claim 5, characterized in that: The slide groove (61) and the bolt hole of the corresponding bolt (8) are arranged perpendicular to each other. One end of the linkage rod (62) facing the outer side of the outer gear ring (53) is wedge-shaped. The wedge-shaped end of the linkage rod (62) can extend into the bolt hole. The bolt (8) is slidably connected to the wedge-shaped surface of the linkage rod (62). The other end of the linkage rod (62) is triangular-shaped. The triangular tip of the linkage rod (62) faces the inner side of the outer gear ring (53). The two triangular inclined surfaces of the linkage rod (62) are symmetrically arranged. The two push rods (63) are slidably connected to the two inclined surfaces respectively.

7. A wind power speed increasing gearbox sealing structure according to claim 1, characterized in that: The oil retaining ring (9) comprises a mounting ring (91), the mounting ring (91) being clamped between the bearing (31) and a corresponding end cover, the mounting ring (91) extending out of the bearing (31) towards one end of the gear set (5) and being connected to a retaining ring (92), the retaining ring (92) extending obliquely towards one side of the axis of the gear set (5).

8. A wind power speed increasing gearbox sealing structure according to claim 7, characterized in that: The oil retaining ring (9) is formed by splicing two semicircular rings, and the mounting ring (91) and the retaining ring (92) are both formed by splicing two semicircular rings. An oil collecting groove (93) is provided on the lower semicircular ring. The oil collecting groove (93) is arranged on the side of the oil retaining ring (9) facing the bearing (31), and an oil return hole (94) is provided through the lowest point of the oil collecting groove (93).

9. A wind power speed increasing gearbox sealing structure according to claim 1, characterized in that: Mechanical seals are provided between the output shaft (3) and the input shaft (4) and the corresponding left end cover (1) and right end cover (2).

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