Impact-resistant, sealing and cooling integrated bearing of pneumatic starter

Abstract

An impact-resistant, sealing and cooling integrated bearing of a pneumatic starter comprises an inner ring, an outer ring, rolling bodies and a sealing cover, the inner ring is composed of a first inner ring and a second inner ring which are detachably connected, and the rolling bodies are assembled on the outer surfaces of the first inner ring and the second inner ring respectively; first grooves are symmetrically formed in the inner circular surface of the outer ring, a buffering base body is embedded in the grooves, and the buffering base body comprises a honeycomb-shaped elastic base body and a plurality of wave-shaped metal elastic rings arranged on the honeycomb-shaped elastic base body in a sleeving mode; an annular main channel and an integrally-formed boss are arranged in the outer ring, a plurality of contact blocks are arranged on the boss, each contact block is fixedly connected with a flow guide block located in the annular main channel through a connecting rod, a friction disc is further arranged between the rolling bodies, and a plurality of protrusions connected with the outer edge of the friction disc are arrayed on the friction disc. Impact energy is absorbed through the buffering base body, the pressure of the cavity is monitored and regulated in real time through the pressure sensor, self-adaptive regulation of the flow of cooling liquid is achieved by driving the flow guide block through the friction disc, and the impact resistance, the sealing performance and the cooling efficiency of the bearing are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of bearings, and in particular to a pneumatic starter bearing that integrates shock resistance, sealing, and cooling. Background Technology

[0002] In existing pneumatic starters for aircraft, bearings, as critical support components, must withstand multiple operating conditions, including high-speed rotation, complex loads, and extreme temperature changes. Traditional bearings present the following problems when facing starter start-up and shutdown, sudden changes in operating conditions, or impact loads:

[0003] First, when faced with starter motor start-stop, sudden changes in operating conditions, or instantaneous impact loads, traditional bearing structures are prone to stress concentration between the rolling elements and the inner and outer rings, leading to fatigue damage and affecting bearing life and reliability.

[0004] Secondly, the sealing structure of existing bearings is prone to failure under high pressure, high speed or drastic temperature changes, leading to lubricant leakage or the entry of external impurities, which affects the normal operation of the bearing.

[0005] Third, traditional bearings lack effective cooling structures, making it difficult to dissipate heat in a timely manner under high load and high speed conditions, which can easily lead to excessive temperature rise. Moreover, most existing bearings are single-function structures, making it difficult to meet multiple operating conditions such as impact resistance, sealing, and cooling at the same time, resulting in complex systems and high maintenance costs. Summary of the Invention

[0006] To address the aforementioned issues, this invention provides an integrated pneumatic starter bearing that combines shock resistance, sealing, and cooling. This bearing effectively buffers instantaneous impact loads, monitors pressure, and integrates cooling functions, thereby improving the bearing's reliability, load-bearing capacity, and service life under complex operating conditions. The technical solution adopted in this invention is as follows: A pneumatic starter bearing integrating shock resistance, sealing, and cooling includes an inner ring, an outer ring, rolling elements, and a sealing cover. The inner ring comprises a first inner ring and a second inner ring, which are detachably connected together. Rolling elements are respectively mounted on the outer surfaces of the first and second inner rings. Two first grooves are symmetrically formed on the inner surface of the outer ring, and a buffer base is embedded in each first groove. The buffer base includes an elastic base and multiple metal elastic rings, which are sequentially fitted onto the elastic base. A sealing cover is also fitted between the inner and outer rings on both sides. A pressure sensor is also provided on the inner side, and an annular main channel is also provided inside the outer ring. A boss is also integrally formed inside the outer ring. The boss is located between the first inner ring and the second inner ring, and multiple target nozzles are provided on both sides of the boss. Each target nozzle is connected to the annular main channel. Multiple contact blocks are also provided on the boss. Each contact block is fixedly connected to a guide block through a connecting rod. The guide block is located inside the annular main channel, and each guide block has a guide channel. A friction disk is also provided between the rolling elements. Multiple protrusions are arrayed on the friction disk, and each protrusion is connected to the outer edge of the friction disk.

[0007] Preferably, the inner sides of the outer ring extend outward from the bosses to form a rolling cavity with the corresponding sealing cover, and the outer ring also has multiple cooling channels, each of which is connected to the annular main channel.

[0008] Preferably, the elastic matrix has a honeycomb structure and is made of metal or composite material, and the metal elastic ring has a wave structure.

[0009] Preferably, the first inner ring and the second inner ring are tapered structures and are respectively installed on both sides of the boss. The first inner ring has multiple first threaded holes, and the second inner ring also has multiple locking holes adapted to each first threaded hole. Each first threaded hole is also equipped with a locking mechanism, and the locking mechanism extends into the locking hole.

[0010] Preferably, the locking mechanism includes a threaded sleeve, which is fixedly installed in the first threaded hole and partially extends into the locking hole. One end of the threaded sleeve is also provided with multiple ball holes, each ball hole being fitted with a locking ball. The threaded sleeve is also fitted with a push rod, the upper part of which is fixedly connected to the locking nut, and the bottom of which is fixed with a top ball, which is located between the multiple locking balls.

[0011] Preferably, the locking nut is also threadedly fitted into a threaded sleeve, and the head of the locking nut is also provided with an adjustment hole, the top ball contacts each locking ball, and the inner wall of the locking hole is also provided with an annular locking groove, and a reset tensioning ring is fitted in the locking groove.

[0012] Preferably, each bead hole has a limiting part on its outer edge, and the multiple bead holes are connected in a cross shape.

[0013] Preferably, the rolling element includes a cage and a plurality of balls, with a plurality of balls evenly arranged on each cage, and mounting grooves are formed on the end faces of the cages that are close to each other, and a friction disc is provided in the mounting groove.

[0014] Preferably, each connecting rod is also fitted with a first spring, which is located between the contact block and the inside of the boss, and each contact block also has symmetrical arc-shaped rounded corners.

[0015] Preferably, the inner side of the sealing cover also has a sealing groove, and a sealing ring is disposed in the sealing groove.

[0016] The beneficial effects of this invention are as follows: First, this invention employs a two-stage buffer structure consisting of a honeycomb elastic matrix and a wave-shaped metal elastic ring, which can effectively absorb instantaneous impact energy (such as load impacts from starter motor takeoff or high-altitude gusts of wind) and assist in resetting when the axial load decreases. Experimental data shows that compared with traditional bearings, the rolling element contact stress can be reduced by nearly 40%, and the plastic deformation of the outer ring raceway can be reduced by more than 75%, significantly solving the fatigue damage problem caused by stress concentration and extending the bearing life.

[0017] Secondly, the first and second inner rings are detachably fastened together by a unique locking mechanism, forming a tapered inner ring structure that can coordinate axial and radial loads. This ensures a tight fit between the two inner rings under complex operating conditions, improving the overall load-bearing rigidity and stability of the bearing.

[0018] Third, through the intermittent contact between the protrusions on the friction disc and the contact block, the guide block is driven to move within the annular main channel, causing the outlet of the guide channel to automatically match and connect with the target nozzle according to the rotational speed, thus achieving adaptive adjustment of the coolant flow rate according to the drive shaft speed. Experimental data shows that this structure can reduce the steady-state operating temperature of the bearing by more than 35% and the temperature rise rate by 53%-56%, effectively avoiding high-temperature failure under high load and high speed conditions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the three-dimensional assembly structure of the present invention; Figure 2 This is a three-dimensional exploded structure diagram of the present invention; Figure 3 This is a schematic diagram of the internal structure of the outer ring of the present invention; Figure 4 This is a schematic diagram of the outer ring assembly buffer substrate of the present invention; Figure 5 This is a three-dimensional structural schematic diagram of the first inner ring of the present invention; Figure 6 This is a top-down view of the exploded structure of the present invention; Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure along line AA; Figure 8 This is a schematic diagram of the cross-sectional structure along line BB in section 6; Figure 9 This is a schematic diagram of the internal structure of the present invention; Figure 10 This is a partial cross-sectional enlarged structural schematic diagram of the present invention; In the diagram: Inner ring 1, Outer ring 2, Rolling element 3, Sealing cap 4, First inner ring 10, Second inner ring 11, First groove 20, Buffer base 21, Elastic base 210, Metal elastic ring 211, Annular main channel 22, Boss 23, Target nozzle 24, Contact block 25, Connecting rod 26, Guide block 27, Guide channel 270, Friction disc 5, Protrusion 50, Cooling channel 6, First threaded hole 7, Locking hole 8, Locking mechanism 9, Threaded sleeve 90, Locking ball 91, Top rod 92, Locking nut 93, Top ball 94, Locking groove 95, Reset tensioning ring 96, Ball hole 97, Adjustment hole 98, Limiting part 99, Cage 30, Ball 31, Mounting groove 32, First spring 12, Sealing groove 13, Sealing ring 14, Rolling cavity 15, and Pressure sensor 16. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] In the description of this invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] Example 1: See appendix Figure 1-10A pneumatic starter bearing integrating shock resistance, sealing, and cooling is disclosed, comprising an inner ring 1, an outer ring 2, rolling elements 3, and a sealing cover 4. The outer surface of the inner ring 1 has a raceway. The rolling elements 3 are movably fitted between the inner ring 1 and the outer ring 2. The sealing cover 4 is located on both sides of the bearing and movably seals between the outer ring 2 and the inner ring 1, sealing the rolling elements 3 to prevent internal lubricant leakage or external impurities from entering. Traditional bearings typically have only one inner ring 1, which limits their load-bearing capacity. The inner ring 1 described in this application includes a first inner ring 10 and a second inner ring 11, which are detachably connected together. The first inner ring 10 and the second inner ring 11 are mirror-assembled and adapted to the internal tapered surface of the outer ring 2. During the descent or ascent of the aircraft, it can coordinate axial and radial loads, especially axial loads. The outer surfaces of the first inner ring 10 and the second inner ring 11 are respectively equipped with rolling elements 3. The inner circular surface of the outer ring 2 is also symmetrically provided with two first grooves 20, and each first groove 20 is embedded with a buffer base 21. When subjected to axial and crystalline loads, the impact between the conventional rolling elements 3 and the outer ring 2 will increase. However, this application can reduce the impact through the buffer base 21. The buffer base 21 includes an elastic base 210 and multiple metal elastic rings 211, and the multiple metal elastic rings 211 are sequentially fitted on the elastic base 210. Specifically, when reducing axial load, the multiple metal elastic rings 211 will be axially compressed to form a step-by-step buffer.When subjected to radial loads, the elastic matrix 210 can buffer the radial load. It employs a two-stage impact-resistant structure of a honeycomb elastic matrix and a metal elastic ring. The elastic matrix 210 absorbs instantaneous impact energy (such as load impacts from starter takeoff or high-altitude gusts of wind). The metal elastic ring 211 can assist in restoring the elastic matrix 210 when the axial load decreases, solving the problem of insufficient impact resistance in existing integrated bearings. A sealing cover 4 is also installed between the inner ring 1 and the outer ring 2 on both sides. The sealing cover 4 is generally movable (rotatable) and mounted on both sides of the bearing to achieve a seal. A pressure sensor 16 is also provided on the inner side of the sealing cover 4. The pressure sensor 16 is connected to the starter motor control system signal. The pressure sensor 16 monitors the pressure changes in the bearing rolling cavity 15 in real time and regulates the pressure (coolant pressure) in the bearing cavity through the control system to avoid seal failure caused by sudden pressure changes. An annular main channel 22 is also provided inside the outer ring 2. The annular main channel 22 is also connected to the coolant outlet of the bearing housing. A boss 23 is integrally formed inside the outer ring 2. The boss 23 is located between the first inner ring 10 and the second inner ring 11. Furthermore, multiple targeted nozzles 24 are provided on both sides of the boss 23, each of which is connected to the annular main channel 22, allowing coolant to be branched into the rolling chamber 15. Multiple contact blocks 25 are also provided on the boss 23, with the ends of the contact blocks 25 intermittently contacting the protrusions 50 of the friction disk 5. When the drive shaft rotates, the rolling element 3 rotates accordingly, and the friction disk 5 also rotates, continuously pressing against the contact blocks 25. Each contact block 25 is fixedly connected to a guide block 27 via a connecting rod 26, and the guide block 27 is located within the annular main channel 22. The contact block 25 causes the corresponding guide block 27 to move, and each guide block 27 has a guide channel 270. During the movement, the outlet of the guide channel 270 connects with the corresponding target nozzle 24, thereby allowing the coolant to continuously and orderly enter the rolling cavity 15 for cooling. This method can adaptively match the inlet (coolant) speed with the rotational speed of the drive shaft, thus achieving better cooling. A friction disk 5 is also provided between the rolling elements 3, and multiple protrusions 50 are arrayed on the friction disk 5, each protrusion 50 being connected to the outer edge of the friction disk 5.

[0023] In some embodiments, see Figure 10 The inner sides of the outer ring 2 extend outward from the boss 23, forming a rolling cavity 15 with the corresponding sealing cover 4. The outer ring 2 also has multiple cooling channels 6, each of which is connected to the annular main channel 22. The coolant of the bearing housing can be continuously input into the annular main channel 22 inside the outer ring 2 through the cooling channel 6.

[0024] In some embodiments, see Figure 4The elastic matrix 210 has a honeycomb structure and is made of metal or composite material, while the metal elastic ring 211 has a wave structure. Its main purpose is to buffer axial and radial loads.

[0025] In some embodiments, see Figures 5-10 The first inner ring 10 and the second inner ring 11 have a tapered structure and are respectively installed on both sides of the boss 23. The first inner ring 10 has multiple first threaded holes 7, and the second inner ring 11 also has multiple locking holes 8 that correspond to each first threaded hole 7. Each first threaded hole 7 is also equipped with a locking mechanism 9, which partially extends into the locking hole 8. The locking mechanism 9 can tightly combine the first inner ring 10 and the second inner ring 11 together. This mirror combination forms the inner ring 1, which improves the bearing's load-bearing capacity.

[0026] In some embodiments, see Figure 5-8 The locking mechanism 9 includes a threaded sleeve 90, which is fixedly installed in the first threaded hole 7 and partially extends into the locking hole 8. One end of the threaded sleeve 90 is also provided with a plurality of ball holes 97, each ball hole 97 is fitted with a locking ball 91. The threaded sleeve 90 is also fitted with a push rod 92, the upper part of which is fixedly connected to the locking nut 93, and the bottom of which is fixed with a top ball 94, which is located between the plurality of locking balls 91.

[0027] Specifically, the threaded sleeve 90 has a hollow internal structure and a threaded external structure. It is fixedly installed in the first threaded hole 7. When assembling the bearing, the first inner ring 10 and the second inner ring 11 are first aligned with the axial direction of the outer ring 2 from both ends. Then, the threaded sleeve 90 extending from the end face of the first inner ring 10 is inserted into the locking hole 8. At this time, by turning the locking nut 93, the push rod 92 is continuously extended. During the extension of the push rod 92, it will drive the push ball 94 to gradually contact and squeeze the multiple locking balls 91 at the end, so that the locking balls 91 are pushed out from the ball hole 97. The pushed-out locking balls 91 are directly located in the locking hole 8, thus achieving locking.

[0028] In some embodiments, the locking nut 93 is also threaded into the threaded sleeve 90, and the head of the locking nut 93 is also provided with an adjustment hole 98. The adjustment hole 98 is generally hexagonal. If a hexagonal screw is used, it is inserted into the adjustment hole 98 and then rotated, so that the locking nut 93 pushes out the push rod 92. The push ball 94 contacts each locking ball 91, and the inner wall of the locking hole 8 is also provided with an annular locking groove 95. The reset tension ring 96 is installed in the locking groove 95. The pushed-out locking ball 91 will be located in the locking groove 95, so it will not separate. When separation occurs, simply turn the locking nut 93 in the opposite direction, so that the push ball 94 at the bottom of the push rod 92 is released from contact with the locking ball 91. Under the contraction action of the reset tension ring 96, the locking ball 91 returns to the ball hole 97, so that the first inner ring 10 and the second inner ring 11 can be separated.

[0029] In some embodiments, the outer edge of each bead hole 97 also has a limiting portion 99, the main purpose of which is to prevent the locking bead 91 from dislodging from the bead hole 97 before assembly, and the plurality of bead holes 97 are connected in a cross shape, with the abutment 94 located on the axis of the cross-shaped connection.

[0030] Based on this, this application also provides comparative experimental data, as shown in Table 1: I. Experimental Objective: Impact resistance performance comparison: the attenuation effect of the buffer matrix (elastic matrix + metal elastic ring) on ​​impact load.

[0031] Comparison of reliability of double inner ring locking: verifying the connection stiffness and stability of the double inner rings of the locking mechanism under complex loads.

[0032] Cooling efficiency comparison: Verify the effect of the targeted nozzle and guide block structure on temperature rise control.

[0033] II. Experimental Samples: Experimental group: The integrated bearing described in this invention; Control group 1: Standard single inner ring rolling bearing (without buffer structure); Control group 2: Traditional double inner ring bearing (without locking mechanism); III. Simulation of Experimental Working Conditions Load: Simulate the starter takeoff condition by applying an axial impact load (e.g., 5000N, lasting 10ms) and a radial alternating load (e.g., 3000N±1000N, frequency 50Hz).

[0034] Speed: 0 to 30000 rpm for accelerated start-up.

[0035] Ambient temperature: Initial 25℃, simulated high load operation for 30 minutes.

[0036]

[0037] Experimental data analysis: 1. The experimental group, through the dual-stage buffering of the honeycomb elastic matrix 210 and the wavy metal elastic ring 211, was able to disperse and absorb instantaneous impact energy. Comparative data showed that the contact stress of the rolling element 3 could be reduced by nearly 40%, and the plastic deformation of the outer ring could be reduced by more than 75%, effectively solving the fatigue damage problem caused by stress concentration in traditional bearings.

[0038] 2. The embedded locking mechanism, employing locking balls 91 and annular locking grooves 95, offers superior vibration resistance and anti-loosening capabilities compared to traditional threaded connections. Expected data shows an 81% reduction in fretting wear and a preload retention rate of up to 95%, ensuring a tight fit between the two inner rings under complex operating conditions and enhancing the overall bearing rigidity and stability.

[0039] 3. The adaptive flow guiding structure driven by friction disc 5 automatically matches the coolant flow rate with the rotational speed. Expected data shows that the steady-state operating temperature is reduced by more than 35%, effectively preventing high-temperature failure. Simultaneously, real-time monitoring and feedback from pressure sensor 16 keep pressure fluctuations within the cavity within a very small range (±2%), achieving dynamic sealing and significantly reducing the risk of grease leakage.

[0040] In some embodiments, see Figure 2-3 The rolling element 3 includes a cage 30 and a plurality of balls 31. A plurality of balls 31 are evenly arranged on each cage 30, and mounting grooves 32 are formed on the end faces of the cages 30 that are close to each other. A friction disc 5 is also provided in the mounting grooves 32.

[0041] In some embodiments, each connecting rod 26 is also fitted with a first spring 12, which is located between the contact block 25 and the boss 23, and each contact block 25 also has symmetrical arc-shaped rounded corners.

[0042] In some embodiments, the inner side of the sealing cover 4 also has a sealing groove 13, and a sealing ring 14 is provided in the sealing groove 13. One side of the sealing ring 14 is fixedly connected to the corresponding first inner ring 10 or second inner ring 11, and the other end of the sealing ring 14 extends into the interior of the outer ring 2 and is fixedly connected to the moving ring. Generally, the moving ring is embedded and movably installed inside the outer side of the outer ring 2.

[0043] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A pneumatic starter motor integrated bearing for shock resistance, sealing and cooling, comprising an inner ring (1), an outer ring (2), rolling elements (3) and a sealing cap (4), characterized in that, The inner ring (1) includes a first inner ring (10) and a second inner ring (11), and the first inner ring (10) and the second inner ring (11) are detachably connected together. The outer surfaces of the first inner ring (10) and the second inner ring (11) are respectively equipped with rolling elements (3). The inner circular surface of the outer ring (2) is also symmetrically provided with two first grooves (20), and each first groove (20) is embedded with a buffer base (21). The buffer base (21) includes an elastic base (210) and a plurality of metal elastic rings (211), and the plurality of metal elastic rings (211) are sequentially fitted on the elastic base (210). A sealing cover (4) is also provided between the inner ring (1) and the two sides of the outer ring (2). A pressure sensor (16) is also provided on the inner side of the sealing cover (4). An annular main ring is also provided inside the outer ring (2). The channel (22) is further provided with an integrally formed boss (23) inside the outer ring (2). The boss (23) is located between the first inner ring (10) and the second inner ring (11). Multiple target nozzles (24) are provided on both sides of the boss (23). Each target nozzle (24) is connected to the annular main channel (22). Multiple contact blocks (25) are also provided on the boss (23). Each contact block (25) is fixedly connected to the guide block (27) through the connecting rod (26). The guide block (27) is located inside the annular main channel (22). Each guide block (27) has a guide channel (270). A friction disk (5) is also provided between the rolling bodies (3). Multiple protrusions (50) are arrayed on the friction disk (5). Each protrusion (50) is connected to the outer edge of the friction disk (5).

2. The integrated pneumatic starter bearing with shock resistance, sealing, and cooling as described in claim 1, characterized in that, The inner sides of the outer ring (2) extend outward from the boss (23) and form a rolling cavity (15) with the corresponding sealing cover (4). The outer ring (2) also has multiple cooling channels (6), each of which is connected to the annular main channel (22).

3. The integrated pneumatic starter bearing with shock resistance, sealing, and cooling as described in claim 1, characterized in that, The elastic matrix (210) has a honeycomb structure and is made of metal or composite material, and the metal elastic ring (211) has a wave structure.

4. The integrated pneumatic starter bearing with shock resistance, sealing, and cooling as described in claim 1, characterized in that, The first inner ring (10) and the second inner ring (11) are tapered structures and are respectively installed on both sides of the boss (23). The first inner ring (10) has a plurality of first threaded holes (7), and the second inner ring (11) also has a plurality of locking holes (8) adapted to each first threaded hole (7). Each first threaded hole (7) is also equipped with a locking mechanism (9), and the locking mechanism (9) extends into the locking hole (8).

5. The integrated pneumatic starter bearing with shock resistance, sealing, and cooling as described in claim 4, characterized in that, The locking mechanism (9) includes a threaded sleeve (90), which is fixedly installed in the first threaded hole (7) and partially extends into the locking hole (8). One end of the threaded sleeve (90) is also provided with a plurality of ball holes (97), each ball hole (97) is fitted with a locking ball (91), and the threaded sleeve (90) is also fitted with a push rod (92). The upper part of the push rod (92) is fixedly connected to the locking nut (93), and the bottom of the push rod (92) is also fixed with a top ball (94). The top ball (94) is located between the plurality of locking balls (91).

6. The integrated pneumatic starter bearing with shock resistance, sealing, and cooling as described in claim 5, characterized in that, The locking nut (93) is also threadedly fitted into the threaded sleeve (90), and the head of the locking nut (93) is also provided with an adjustment hole (98). The top ball (94) contacts each locking ball (91), and the inner wall of the locking hole (8) is also provided with an annular locking groove (95). The locking groove (95) is fitted with a reset tensioning ring (96).

7. The integrated pneumatic starter bearing with shock resistance, sealing, and cooling as described in claim 5, characterized in that, Each bead hole (97) also has a limiting part (99) on its outer edge, and the multiple bead holes (97) are connected in a cross shape.

8. The integrated pneumatic starter bearing with shock resistance, sealing, and cooling as described in claim 1, characterized in that, The rolling element (3) includes a cage (30) and a plurality of balls (31). A plurality of balls (31) are evenly arranged on each cage (30), and mounting grooves (32) are provided on the end faces of the cages (30) that are close to each other. A friction disc (5) is also provided in the mounting groove (32).

9. The integrated pneumatic starter bearing with shock resistance, sealing, and cooling as described in claim 1, characterized in that, Each connecting rod (26) is also fitted with a first spring (12), which is located between the contact block (25) and the boss (23), and each contact block (25) also has symmetrical arc-shaped rounded corners.

10. The integrated pneumatic starter bearing with shock resistance, sealing, and cooling as described in claim 1, characterized in that, The inner side of the sealing cover (4) also has a sealing groove (13), and a sealing ring (14) is provided in the sealing groove (13).

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