Squeezing oil film damper

Abstract

The invention provides an extrusion oil film damper which comprises a damper body and sealing end covers arranged on the two axial sides of the damper body, the damper body comprises an elastic extrusion deformation area arranged in the axial direction of the damper body in a penetrating mode, and damping adjusting channels are defined between the damper body and the sealing end covers. The damping adjusting channel comprises an oil storage groove for storing oil of the damper and a damping adjusting groove for adjusting damping of the damper, and the depth of the oil storage groove is larger than that of the damping adjusting groove. The oil storage grooves and the damping adjusting grooves are alternately arranged in the circumferential direction of the damper body and communicate with one another, and the damping adjusting channel correspondingly communicating with the elastic extrusion deformation area is formed. The damping device has the advantages of providing continuous and stable damping, reducing the vibration amplitude of rotating equipment and the like.

Description

Technical Field

[0001] The present invention relates to the field of damping and vibration reduction, and in particular to a squeeze film damper. Background Art

[0002] As the speed of rotating equipment becomes higher and higher, the speed operating range of rotating equipment becomes wider and wider, resulting in a smaller and smaller avoidance rate of the critical speed of rotating equipment, which affects the stable operation of the equipment. At the same time, the vibration requirements for equipment in engineering projects are getting higher and higher, and conventional design methods or means have been difficult to meet the requirements. In addition, due to the influence of airflow disturbances and the like, there will be more or less low-frequency components when the rotating equipment is running, resulting in large vibration fluctuations when the equipment is running, and additional damping needs to be provided to the system to suppress such amplitude fluctuations. In order to solve the above problems, the existing method usually adopts a squeeze film damper, but the existing squeeze film damper usually provides unstable damping when the vibration of the rotating equipment is large, thereby affecting the performance of the damper and easily causing the damper to fail, which seriously affects the safe and stable operation of the rotating equipment. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a squeeze film damper that provides continuous and stable damping and reduces the vibration amplitude of rotating equipment.

[0004] In order to solve the above technical problems, the technical solution proposed by the present invention is:

[0005] A squeeze film damper comprises a damper body and sealing end covers arranged on both axial sides of the damper body, the damper body comprising an elastic squeeze deformation zone arranged axially through the damper body, a damping adjustment channel is formed between the damper body and the sealing end covers, the damping adjustment channel comprises an oil storage tank for storing damper oil and a damping adjustment groove for adjusting the damping of the damper, the depth of the oil storage tank is greater than the depth of the damping adjustment groove, the oil storage tank and the damping adjustment groove are alternately arranged along the circumference of the damper body and are interconnected to form the damping adjustment channel corresponding to the elastic squeeze deformation zone.

[0006] As a further improvement of the above technical solution:

[0007] The damping adjustment groove and the oil storage groove are both arc-shaped grooves provided on the sealing end cover; the damping of each damping adjustment groove is directly proportional to the arc length of the damping adjustment groove, and is inversely proportional to the width and depth of the damping adjustment groove.

[0008] The damping at the damping adjustment groove and the arc length, width and depth of the damping adjustment groove satisfy the following relationship:

[0009]

[0010] Among them, F is the damping of the damping adjustment groove, is the viscosity of the lubricating oil in the damping adjustment channel, is the arc length of the damping adjustment groove, is the width of the damping adjustment groove, is the depth of the damping adjustment groove, n represents the nth damping adjustment groove, and n is a positive integer.

[0011] The sum of the damping at the damping adjustment groove and the damping required by the component to be damped satisfies the following relationship:

[0012]

[0013] Where c is the damping required for the component to be damped, H(F n ) indicates that according to F n The calculated damping of the nth damping adjustment slot, N represents the total number of damping adjustment slots, and c0 is the damping of the elastic extrusion deformation zone.

[0014] There are multiple groups of elastic extrusion deformation zones, which are arranged along the circumference of the damper body. The elastic extrusion deformation zones include inner oil film extrusion grooves, elastic deformation grooves and outer oil film extrusion grooves that are connected in sequence from the inside to the outside along the radial direction of the damper body. The inner oil film extrusion grooves and the outer oil film extrusion grooves are arranged along the circumference of the damper body. The elastic deformation grooves are curved grooves that can deform the extrusion oil film, and the curved grooves are correspondingly connected to the damping adjustment grooves; the damping adjustment channel covers the elastic deformation grooves and the outer oil film extrusion grooves.

[0015] The curved groove is two S-shaped through holes parallel to each other and arranged radially along the damper body. The inner oil film extrusion groove and the outer oil film extrusion groove are arc-shaped through holes staggered along the circumference of the damper body. The two S-shaped through holes are respectively connected to the arc-shaped through holes of the inner oil film extrusion groove and the outer oil film extrusion groove; the two elastic extrusion deformation zones connected through the inner oil film extrusion groove are corresponding to the damping adjustment groove, and the two elastic extrusion deformation zones connected through the outer oil film extrusion groove are corresponding to the oil storage tank.

[0016] The curved groove is a U-shaped through hole, which forms an elastic extrusion deformation zone with a half-moon structure together with the inner oil film extrusion groove and the outer oil film extrusion groove. The damping adjustment groove and the oil storage groove are arranged corresponding to the elastic extrusion deformation zone.

[0017] The damper body is divided into a body inner ring and a body outer ring by the elastic extrusion deformation zone, and the rigidity of the body inner ring and the body outer ring is higher than the rigidity of the elastic extrusion deformation zone.

[0018] The squeeze film damper also includes a lubricating oil state monitoring assembly, which includes an oil quantity detection unit and an oil cooling unit. The oil quantity detection unit includes a lubricating oil accumulator, a lubricating oil pipe, an oil quantity detection member, and a first controller. The lubricating oil accumulator is connected to the oil storage tank via the lubricating oil pipe. The oil quantity detection member is located at a preset oil height in the lubricating oil accumulator. The input end of the first controller is electrically connected to the oil quantity detection member, and the output end is electrically connected to the oil quantity regulating valve of the lubricating oil accumulator.

[0019] The oil quantity detection component is used to collect the real-time lubricating oil quantity of the lubricating oil accumulator in real time and transmit the lubricating oil quantity data to the first controller; the first controller sends a start instruction to the oil quantity regulating valve when the real-time lubricating oil quantity is lower than the preset oil height of the lubricating oil accumulator.

[0020] The oil cooling unit includes a second controller, a heat dissipation sleeve sleeved outside the damper body, and a temperature detection member with a detection end located inside the damper body, the heat dissipation sleeve is provided with an external cooling source, a coolant inlet and a coolant outlet, and an annular cooling groove is provided on the outer surface of the damper body, and the external cooling source, coolant inlet, annular cooling groove and coolant outlet are connected in sequence;

[0021] The temperature detection element is used to collect the real-time temperature of the damper body and transmit the real-time temperature data to the second controller; the second controller sends a start instruction to the external cooling source when the real-time temperature is higher than the preset temperature of the damper body.

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] The damper body of the present invention is provided with an elastic extrusion deformation zone, which is axially through-arranged and generates an extrusion oil film during extrusion deformation, providing stiffness matching the rotating equipment (such as bearings, etc.), and forming a part of the damper's damping through the deformed extrusion oil film; at the same time, the damper body of the present invention and the sealing end cover are enclosed to form a damping adjustment channel, which includes an oil storage tank and a damping adjustment tank, and the oil storage tank stores lubricating oil when the extrusion oil film damper is working; the depth of the oil storage tank is greater than the depth of the damping adjustment tank, and the oil storage tank and the damping adjustment tank are alternately arranged along the circumference of the damper body and are interconnected, forming a damping adjustment channel connected to the elastic extrusion deformation zone. Due to the depth difference between the oil storage tank and the damping adjustment tank, oil channels of different widths will be formed between the oil storage tank, the damping adjustment tank, and the elastic extrusion deformation zone of the damper body. At this time, when the lubricating oil is squeezed under the action of the load, the gap between the damping adjustment channel and the oil channel formed by the elastic extrusion deformation zone will change, thereby squeezing the oil film and further increasing the damping, so as to generate resistance when the lubricating oil flows, forming another part of the damping of the damper. That is, the present invention can form a higher oil film pressure through the deformation of the elastic body structure and the depth difference between the oil storage tank and the damping adjustment tank, so as to provide damping continuously and stably, effectively absorb vibration energy, reduce the vibration amplitude of the rotating equipment, and provide a guarantee for the continuous, safe and stable operation of the rotating equipment. In addition, its structure is simple, does not need to occupy the excess space of the squeeze film damper, and is low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0025] Figure 1 Schematic diagram of the three-dimensional structure of the squeeze film damper of the present invention;

[0026] Figure 2 Schematic diagram of the exploded structure of the squeeze film damper of the present invention;

[0027] Figure 3 is a front view of the squeeze film damper of the present invention;

[0028] Figure 4 yes Figure 3 A cross-sectional view of section AA;

[0029] Figure 5 yes Figure 4 Schematic diagram of the structure in the middle B direction;

[0030] Figure 6 2 is a schematic diagram of the three-dimensional structure of the squeeze film damper of the present invention (the heat dissipation sleeve is not shown);

[0031] Figure 7 yes Figure 6 perspective drawing;

[0032] Figure 8 yes Figure 7 Cross-sectional view of CC section;

[0033] Figure 9 It is a front view of the damper body of the present invention;

[0034] Figure 10 yes Figure 9 Cross-sectional view of DD section;

[0035] Figure 11 Schematic diagram of the structure of the sealing end cover of the present invention;

[0036] Figure 12 is another front view of the damper body of the present invention;

[0037] The numbers in the figure represent:

[0038] 1. Damper body; 11. Elastic extrusion deformation zone; 111. Inner oil film extrusion groove; 112. Elastic deformation groove; 1121. S-shaped through hole; 1122. U-shaped through hole; 113. Outer oil film extrusion groove; 114. Stiffness adjustment groove; 12. Inner ring of the body; 13. Outer ring of the body; 14. Annular cooling groove; 2. Sealing end cap; 3. Damping adjustment channel; 31. Oil storage tank; 32. Damping adjustment groove; 4. Lubricating oil status monitoring component; 41. Oil quantity detection unit; 411. Lubricating oil Accumulator; 412, lubricating oil pipe; 413, oil level detection component; 414, exhaust plug; 415, connector; 416, pressure sensor; 42, oil cooling unit; 421, heat dissipation sleeve; 4211, coolant inlet; 4212, coolant outlet; 422, temperature detection component 423, cooling sealing assembly; 424, line card; 5, leak-proof sealing assembly; 51, inner sealing ring; 52, outer sealing ring; 53, annular pressure relief groove; 6, first fastener; 7, second fastener. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited thereby.

[0040] Figures 1 to 12The present invention shows an embodiment of a squeeze film damper, comprising a damper body 1 and a sealing end cap 2. The damper body 1 includes an elastic squeeze deformation zone 11 extending axially through the damper body 1. The sealing end caps 2 are disposed on both axial sides of the damper body 1, enclosing a damping adjustment channel 3 between the damper body 1 and the sealing end caps 2. The damping adjustment channel 3 includes an oil reservoir 31 for storing damper lubricating oil and a damping adjustment groove 32 for adjusting the damper damping. The depth of the oil reservoir 31 is greater than that of the damping adjustment groove 32. The oil reservoir 31 and the damping adjustment groove 32 are alternately arranged along the circumference of the damper body 1 and interconnected, forming a damping adjustment channel 3 corresponding to the elastic squeeze deformation zone 11.

[0041] The damper body 1 of the present invention is provided with an elastic extrusion deformation zone 11, which is axially through-set and generates an extrusion oil film during extrusion deformation, providing stiffness matching the rotating equipment (such as bearings, etc.), and forming part of the damping of the damper through the deformed extrusion oil film; at the same time, the damper body 1 of the present invention and the sealing end cover 2 are enclosed to form a damping adjustment channel 3, and the damping adjustment channel 3 includes an oil storage tank 31 and a damping adjustment tank 32. The oil storage tank 31 stores lubricating oil when the extrusion oil film damper is working; the depth of the oil storage tank 31 is greater than the depth of the damping adjustment tank 32. The oil storage tank 31 and the damping adjustment tank 32 are alternately arranged along the circumference of the damper body 1 and are connected to each other, forming a damping adjustment channel 3 connected to the elastic extrusion deformation zone 11. Due to the depth difference between the oil storage tank 31 and the damping adjustment tank 32, oil channels of different widths will be formed between the oil storage tank 31, the damping adjustment tank 32, and the elastic extrusion deformation zone 11 of the damper body 1. At this time, when the lubricating oil is squeezed under the action of the load, the oil channel formed by the damping adjustment channel 3 and the elastic extrusion deformation zone 11 will produce a gap change, thereby squeezing the oil film and further increasing the damping, so as to generate resistance when the lubricating oil flows, forming another part of the damping of the damper. That is, the present invention can form a higher oil film pressure through the deformation of the elastic body structure and the depth difference between the oil storage tank 31 and the damping adjustment tank 32, so as to provide damping continuously and stably, effectively absorb vibration energy, reduce the vibration amplitude of the rotating equipment, and provide a guarantee for the continuous, safe and stable operation of the rotating equipment. In addition, its structure is simple, does not need to occupy the excess space of the squeeze film damper, and is low in cost.

[0042] Furthermore, the damping adjustment groove 32 and the oil storage groove 31 are both arc-shaped grooves, and the arc-shaped grooves are provided on the sealing end cover 2; the damping of each damping adjustment groove 32 is directly proportional to the arc length of the damping adjustment groove 32, and the damping of each damping adjustment groove 32 is inversely proportional to the width and depth of the damping adjustment groove 32. The present invention can achieve effective adjustment of the damping of each damping adjustment groove 32 by adjusting one or more of the arc length, width and depth of the damping adjustment groove 32, thereby conveniently and effectively adjusting the damper to the required damping in a timely manner to achieve a better vibration reduction effect. Furthermore, the damping of each damping adjustment groove 32 and the arc length, width and depth of the damping adjustment groove 32 satisfy the following relationship:

[0043]

[0044] Wherein, F is the damping of the damping adjustment groove 32, μ is the viscosity of the lubricating oil in the damping adjustment channel 3, l n is the arc length of the damping adjustment slot 32, b n is the width of the damping adjustment slot 32, h n is the depth of the damping adjustment groove 32.

[0045] The present invention uses the above formula (1) to adjust the arc length, width, and depth of the damping adjustment slot 32 to achieve precise adjustment of the damping of the damping adjustment slot 32, thereby achieving the purpose of precisely controlling the damping of the rotating device. Specifically, when it is necessary to increase the damping of the rotating device to a preset value, the damping at the damping adjustment slot 32 can be precisely adjusted by increasing the arc length of the damping adjustment slot 32 and / or reducing the width and depth of the damping adjustment slot 32, thereby increasing the damping of the rotating device to the preset value. Similarly, the above formula (1) can also be used to reduce the damping to achieve the purpose of precise control and cost savings.

[0046] In this embodiment, the sum of the damping of the nth damping adjustment slot 32 and the damping required by the component to be damped satisfies the following relationship:

[0047]

[0048] Where c is the damping required for the component to be damped, H(F n ) indicates that according to F n The calculated damping of the nth damping adjustment slot, N represents the total number of damping adjustment slots, and c0 is the damping of the elastic extrusion deformation zone.

[0049] The present invention uses the above formula (2) to cumulatively sum the damping of all damping adjustment slots. The sum of the cumulative sum of the damping of the damping adjustment slots and the damping of the elastic extrusion deformation zone can be used to obtain the required damping of the component to be damped. The damping of the elastic extrusion deformation zone is the initial damping constant of the elastic extrusion deformation zone. When the required damping of the component to be damped is determined, the required damping of each damping adjustment slot 32 can be quickly and accurately determined, thereby facilitating precise adjustment of the setting size of each damping adjustment slot 32.

[0050] In this embodiment, the depth of the oil storage tank 31 is 2 to 5 times the depth of the damping adjustment tank 32 , so that the oil storage tank 31 can provide sufficient lubricating oil to the damper while ensuring that the damping adjustment tank 32 can effectively adjust the damping.

[0051] like Figure 9 and Figure 12 As shown, there are multiple groups of elastic extrusion deformation zones 11, and the multiple groups of elastic extrusion deformation zones 11 are arranged along the circumference of the damper body 1, so that the rotating equipment can effectively reduce vibration when generating vibration in any direction. The elastic extrusion deformation zone 11 includes an inner oil film extrusion groove 111, an elastic deformation groove 112, and an outer oil film extrusion groove 113, which are connected in sequence from the inside to the outside along the radial direction of the damper body 1. Among them, the inner oil film extrusion groove 111 and the outer oil film extrusion groove 113 are arranged along the circumference of the damper body 1, and the elastic deformation groove 112 is a curved groove that can deform the oil film. The curved groove provides rigid support for the rotating equipment when the rotating equipment is at low speed and small vibration; when the rotating equipment generates high speed and large vibration, the curved groove is elastically deformed due to the impact force of the rotating equipment. At this time, the curved groove generates damping and achieves vibration reduction, preventing the vibration energy of the rotating equipment from being transmitted to external components.

[0052] At the same time, the curved groove is correspondingly connected to the damping adjustment groove 32, and the damping adjustment channel 3 covers the elastic deformation groove 112 and the outer oil film extrusion groove 113, which allows the lubricating oil to pass through the oil storage groove 31, the outer oil film extrusion groove 113, the curved groove and the damping adjustment groove 32 in sequence, thereby better forming a reliable and efficient circulating oil channel of different widths, while ensuring sufficient oil supply to the damper, having a better damping effect.

[0053] In this embodiment, Figure 7 and Figure 9As shown, the curved grooves are two S-shaped through holes 1121, which are parallel to each other and arranged along the radial direction of the damper body 1. The two parallel S-shaped through holes 1121 allow the damper body 1 to deform and generate damping force when the rotor generates high-speed and large vibrations, further preventing the force from being transmitted to external components. The inner oil film extrusion groove 111 and the outer oil film extrusion groove 113 are arc-shaped through holes, which are staggered along the circumference of the damper body 1. This allows the rotating equipment to effectively reduce vibration when generating vibrations in any direction. The specific arrangement of the inner oil film extrusion groove 111, the elastic deformation groove 112, and the outer oil film extrusion groove 113 along the circumference of the damper body 1 is set according to the required load direction. At the same time, two mutually parallel S-shaped through holes 1121 are respectively connected to the arc-shaped through holes of the inner oil film extrusion groove 111 and the outer oil film extrusion groove 113. When the rotor generates high-speed and large vibrations, the S-shaped through holes 1121 deform rapidly, and the arc-shaped through holes of the inner oil film extrusion groove 111 and the outer oil film extrusion groove 113 provide sufficient supporting stiffness.

[0054] At the same time, the two elastic extrusion deformation zones 11 connected by the inner oil film extrusion groove 111 are arranged corresponding to the damping adjustment groove 32, and the two elastic extrusion deformation zones 11 connected by the outer oil film extrusion groove 113 are arranged corresponding to the oil storage groove 31. That is, the two circumferentially adjacent elastic extrusion deformation zones 11 are connected by the same inner oil film extrusion groove 111 or the outer oil film extrusion groove 113. The two adjacent elastic extrusion deformation zones 11 connected by the inner oil film extrusion groove 111 constitute the damping adjustment channel 3 corresponding to the damping adjustment groove 32, and the two adjacent elastic extrusion deformation zones 11 connected by the outer oil film extrusion groove 113 constitute the oil storage zone corresponding to the oil storage groove 31. This forms oil channels of varying depths and widths within the damper, ensuring continuous oil supply while providing improved damping and vibration reduction effects.

[0055] In other embodiments, any curved groove that can ensure that the damper body 1 can be easily deformed and squeeze the oil film should be within the scope of protection of the present invention, such as Figure 12 As shown, the curved groove can also be a U-shaped through hole 1122. The U-shaped through hole 1122, the inner oil film extrusion groove 111, and the outer oil film extrusion groove 113 form a semi-lunar elastic extrusion deformation zone 11. The damping adjustment groove 32 and the oil storage groove 31 are arranged alternately and correspondingly to the elastic extrusion deformation zone 11. This simple structure and ingenious design ensure continuous oil supply while providing better damping and vibration reduction effects.

[0056] Furthermore, the elastic extrusion deformation zone 11 includes stiffness-adjusting grooves 114 that further reduce the stiffness of the damper body 1. These grooves 114 are arranged along the U-shaped through-hole 1122 and the inner oil film extrusion groove 111, and the stiffness-adjusting grooves 114 of adjacent elastic extrusion deformation zones 11 are interconnected. The provision of stiffness-adjusting grooves 114 further reduces the stiffness of the damper body 1, thereby increasing the extrusion deformation of the damper body 1. This creates a larger extrusion oil film during extrusion deformation, further generating damping and achieving a superior vibration reduction effect. Furthermore, this provides a stiffness that matches that of rotating equipment (such as bearings).

[0057] Furthermore, the damper body 1 is divided into an inner ring 12 and an outer ring 13 by an elastic extrusion deformation zone 11. The stiffness of the inner ring 12 and the outer ring 13 is higher than that of the elastic extrusion deformation zone 11. This allows the elastic extrusion deformation zone 11 between the inner ring 12 and the outer ring 13 to deform easily, forming an extrusion oil film and producing a damping effect.

[0058] like Figure 4 and Figure 5 As shown, the squeeze film damper also includes a lubricating oil state monitoring assembly 4, which includes an oil level detection unit 41 and an oil cooling unit 42. The oil level detection unit 41 includes a lubricating oil accumulator 411, a lubricating oil pipe 412, an oil level detection element 413, and a first controller. The lubricating oil accumulator 411 is connected to the oil reservoir 31 via the lubricating oil pipe 412. The oil reservoir 31 is deeper than the damping adjustment groove 32. The connection between the lubricating oil accumulator 411 and the oil reservoir 31 provides sufficient oil storage space for convenient oil input.

[0059] At the same time, an oil level detector 413 is located at a preset oil level within the lubricating oil accumulator 411 and is used to detect the amount of lubricating oil in the damper in real time. The input of the first controller is electrically connected to the oil level detector 413, and the output of the first controller is electrically connected to the oil level control valve of the lubricating oil accumulator 411. The oil level detector 413 is used to collect the real-time lubricating oil level in the lubricating oil accumulator 411 and transmit the lubricating oil level data to the first controller. When the real-time lubricating oil level is lower than the preset oil level in the lubricating oil accumulator 411, it indicates that the damper is running low on lubricating oil. At this point, the first controller issues a start command to the oil level control valve, thereby replenishing the lubricating oil consumed in the damper in real time. This prevents the formation of cavitation in the oil tank due to oil shortage, which would affect the damping effect of the damper and ensure the vibration reduction effect.

[0060] Furthermore, if Figure 4As shown, the oil cooling unit 42 includes a second controller, a heat dissipation sleeve 421, and a temperature detection element 422. The heat dissipation sleeve 421 is sleeved on the outside of the damper body 1 and is provided with an external cooling source, a coolant inlet 4211, and a coolant outlet 4212. The outer surface of the damper body 1 is provided with an annular cooling groove 14. The external cooling source, the coolant inlet 4211, the annular cooling groove 14, and the coolant outlet 4212 are sequentially connected. At this time, the heat dissipation sleeve 421 and the annular cooling groove 14 of the damper body 1 form a cooling chamber and effectively support the damper body 1.

[0061] At the same time, the detection end of the temperature detection element 422 is located inside the damper body 1. The temperature detection element 422 is used to collect the real-time temperature of the damper body 1 and transmit the real-time temperature data to the second controller; when the real-time temperature is higher than the preset temperature of the damper body 1, the second controller sends a start-up instruction to the external cooling source. In this way, the metal temperature of the damper during operation is monitored in real time, so that when the temperature of the damper body 1 is too high, the coolant can be input through the oil cooling unit 42 on the periphery of the damper body 1, and the cooling fluid circulated by the outside world can take away the heat inside the damper, thereby achieving a cooling effect, ensuring that the system can provide continuous and stable damping and realize safe and stable operation of the system. The present invention can realize real-time monitoring and adjustment of the damper operating temperature and lubricating oil quantity through the combination of the oil quantity detection unit 41 and the oil cooling unit 42, thereby ensuring the safe and reliable operation of the system.

[0062] Furthermore, the oil cooling unit 42 further includes cooling seal assemblies 423 provided on both axial sides of the annular cooling groove 14. The cooling seal assemblies 423 are provided between the heat dissipation sleeve 421 and the damper body 1 to effectively prevent the coolant from leaking from both ends of the annular cooling groove 14, thereby ensuring the cooling effect of the damper. Figure 3 As shown, the oil cooling unit 42 also includes a wire clip 424, which is installed on the sealing end cover 2 and is arranged close to the temperature measuring element. It is mainly used to fix the leads of the temperature detecting element 422 to prevent the leads from being messy and affecting the operation of the rotating equipment.

[0063] Preferably, if Figure 1 As shown, the lubricating oil pipe 412 is connected to the oil reservoir 31 of the sealing end cap 2 via a joint 415 to facilitate maintenance and replacement of the oil level detection unit 41. The exhaust plug 414 is connected to the damping adjustment channel 3 and is arranged symmetrically with the joint 415 about the center of the damper body 1. The exhaust plug 414 needs to be removed for exhaust during the initial filling of lubricating oil. It is sealed during operation of the lubricating oil accumulator 411 to prevent lubricating oil leakage. Preferably, a pressure sensor 416 is built into the bottom of the lubricating oil accumulator 411 to measure the pressure changes of the lubricating oil within the lubricating oil accumulator 411 and predict the lubricating oil pressure within the damper.

[0064] like Figure 4 As shown, a leak-proof sealing assembly 5 is provided between the damper body 1 and the sealing end cap 2. The leak-proof sealing assembly 5 includes an inner sealing ring 51 and an outer sealing ring 52, forming a sealed chamber connected to the damping adjustment channel 3 to prevent lubricating oil leakage during damper operation. Furthermore, an annular pressure relief groove 53 is provided between the inner and outer sealing rings 51 and 52. When the load is downward, the elastic extrusion deformation zone 11 deforms downward, increasing the gap in the upper elastic extrusion deformation zone 11 and decreasing the gap in the lower elastic extrusion deformation zone 11. This compresses the oil film, causing some of the lubricating oil in the lower elastic extrusion deformation zone 11 to flow through the damping adjustment channel 3 to the upper elastic extrusion deformation zone 11. The remaining lubricating oil leaking from the oil chamber remains in the inner sealing ring 51. Due to the presence of the annular pressure relief groove 53, some of the lubricating oil can flow away through the annular pressure relief groove 53, resulting in a low lubricating oil pressure inside the inner sealing ring 51. This significantly reduces leakage near the inner sealing ring 51 and ensures safe and effective operation of the damper. In this embodiment, the inner sealing ring 51 and the outer sealing ring 52 may be O-rings.

[0065] Furthermore, the damper body 1 is fixedly connected to the sealing end covers 2 on both sides near the center by a first fastener 6 that is arranged through it, and the outer periphery on both sides of the damper body 1 is fixedly connected to the sealing end covers 2 on the corresponding sides by second fasteners 7 to prevent the sealing end covers 2 on both sides from being deformed excessively under the action of oil pressure, thereby ensuring the sealing effect.

[0066] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A squeeze film damper, characterized in that: The invention comprises a damper body and sealing end covers arranged on both axial sides of the damper body, the damper body comprises an elastic extrusion deformation zone arranged to pass through the damper body axially, a damping adjustment channel is formed between the damper body and the sealing end covers, the damping adjustment channel comprises an oil storage tank for storing damper oil and a damping adjustment groove for adjusting the damping of the damper, the depth of the oil storage tank is greater than the depth of the damping adjustment groove, the oil storage tank and the damping adjustment groove are alternately arranged along the circumference of the damper body and are interconnected to form the damping adjustment channel corresponding to the elastic extrusion deformation zone.

2. The squeeze film damper according to claim 1, characterized in that: The damping adjustment groove and the oil storage groove are both arc grooves arranged on the sealing end cover; the damping of each damping adjustment groove is directly proportional to the arc length of the damping adjustment groove, and is inversely proportional to the width and depth of the damping adjustment groove.

3. The squeeze film damper according to claim 2, characterized in that: The damping at the damping adjustment groove and the arc length, width and depth of the damping adjustment groove satisfy the following relationship: Among them, F n is the damping of the damping adjustment groove, μ is the viscosity of the lubricating oil in the damping adjustment channel, l n is the arc length of the damping adjustment slot, b n is the width of the damping adjustment slot, h n is the depth of the damping adjustment groove, n represents the nth damping adjustment groove, and n is a positive integer.

4. The squeeze film damper according to claim 3, characterized in that: The sum of the damping at the damping adjustment slot and the required damping of the component to be damped satisfy the following relationship: Where c is the damping required for the component to be damped, H(F n ) indicates that according to F n The damping of the nth damping adjustment slot is calculated, N represents the total number of damping adjustment slots, and c0 is the damping of the elastic extrusion deformation zone.

5. The squeeze film damper according to any one of claims 1 to 4, characterized in that: There are multiple groups of elastic extrusion deformation zones, which are arranged along the circumference of the damper body. The elastic extrusion deformation zones include an inner oil film extrusion groove, an elastic deformation groove and an outer oil film extrusion groove which are sequentially connected from the inside to the outside along the radial direction of the damper body. The inner oil film extrusion groove and the outer oil film extrusion groove are arranged along the circumference of the damper body. The elastic deformation groove is a curved groove that can deform the extrusion oil film, and the curved groove is correspondingly connected to the damping adjustment groove; the damping adjustment channel covers the elastic deformation groove and the outer oil film extrusion groove.

6. The squeeze film damper according to claim 5, characterized in that: The curved groove is two S-shaped through holes which are parallel to each other and arranged radially along the damper body; the inner oil film extrusion groove and the outer oil film extrusion groove are arc-shaped through holes which are staggered along the circumference of the damper body; the two S-shaped through holes are respectively connected with the arc-shaped through holes of the inner oil film extrusion groove and the outer oil film extrusion groove; the two elastic extrusion deformation zones connected through the inner oil film extrusion groove are arranged correspondingly to the damping adjustment groove, and the two elastic extrusion deformation zones connected through the outer oil film extrusion groove are arranged correspondingly to the oil storage groove.

7. The squeeze film damper according to claim 5, characterized in that: The curved groove is a U-shaped through hole, and the U-shaped through hole, the inner oil film extrusion groove and the outer oil film extrusion groove form an elastic extrusion deformation zone with a half-moon structure. The damping adjustment groove and the oil storage groove are arranged corresponding to the elastic extrusion deformation zone; the elastic extrusion deformation zone also includes a stiffness adjustment groove for further reducing the stiffness of the damper body, and the stiffness adjustment groove is arranged along the U-shaped through hole and the inner oil film extrusion groove, and the stiffness adjustment grooves of adjacent elastic extrusion deformation zones are connected to each other.

8. The squeeze film damper according to claim 5, characterized in that: The damper body is divided into a body inner ring and a body outer ring by the elastic extrusion deformation zone, and the rigidity of the body inner ring and the body outer ring is higher than the rigidity of the elastic extrusion deformation zone.

9. The squeeze film damper according to any one of claims 1 to 4, characterized in that: It also includes a lubricating oil state monitoring component, the lubricating oil state monitoring component includes an oil quantity detection unit and an oil cooling unit, the oil quantity detection unit includes a lubricating oil accumulator, a lubricating oil pipe, an oil quantity detection member and a first controller; the lubricating oil accumulator is connected to the oil storage tank through the lubricating oil pipe; the oil quantity detection member is arranged at a preset oil height in the lubricating oil accumulator; The input end of the first controller is electrically connected to the oil quantity detection element, and the output end is electrically connected to the oil quantity regulating valve of the lubricating oil accumulator; The oil quantity detection element is used to collect the real-time lubricating oil quantity of the lubricating oil accumulator in real time, and transmit the lubricating oil quantity data to the first controller; The first controller sends a start instruction to the oil quantity regulating valve when the real-time lubricating oil quantity is lower than the preset oil height of the lubricating oil accumulator.

10. The squeeze film damper according to claim 9, characterized in that: The oil cooling unit includes a second controller, a heat dissipation sleeve sleeved outside the damper body, and a temperature detection member with a detection end located inside the damper body, the heat dissipation sleeve is provided with an external cooling source, a coolant inlet and a coolant outlet, the outer surface of the damper body is provided with an annular cooling groove, and the external cooling source, the coolant inlet, the annular cooling groove and the coolant outlet are connected in sequence; The temperature detection element is used to collect the real-time temperature of the damper body in real time and transmit the real-time temperature data to the second controller; the second controller sends a start instruction to the external cooling source when the real-time temperature is higher than the preset temperature of the damper body.

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