89 results about "Squeeze film" patented technology

The invention discloses an elastic support integrated bearing and squeeze film damper integrated structure with outer ring radial holes. The elastic support integrated bearing and squeeze film damper integrated structure comprises an elastic support integrated outer ring, a bearing inner ring, a retainer, a rolling body, a squeeze film damper, a bearing seat and the like. The elastic support integrated outer ring adopts the integrated design of a squirrel-cage type elastic support and the bearing outer ring, the radial size is reduced, the centering precision is improved, and an oil storage groove and a radial oil hole are formed in the outer side wall of the bearing outer ring of the integrated structure; the extrusion oil film damper is located on the outer side of the elastic support integrated bearing, and an oil film is communicated with a radial oil hole in the bearing outer ring, so that bearing lubrication and the extrusion oil film damper share a lubricating oil path; radial lubricating oil lubrication of the bearing is achieved through the arrangement of the radial oil holes, and the situation that the bearing is damaged due to lack of oil lubrication under the extreme working condition is avoided; meanwhile, the oil storage grooves and the radial oil holes can effectively promote flowing of lubricating oil in an oil film, formation of a dead cavity of the squeeze oil film damper is avoided, and the vibration reduction effect of the squeeze oil film damper is enhanced.

The invention discloses an active damping regulation and control system of an integral squeeze film damper, and belongs to the technical field of vibration control of rotary machinery. The system comprises a rotor system, a data acquisition system, a lubrication system and a control system. In the process of starting and working condition changing of a rotating mechanical rotor in the rotor system, the rotating speed of the rotor changes continuously, vibration changes along with working condition changes, and a data collection system collects rotating speed and vibration data of the rotor and then transmits the data to a control system. The control system is used for actively controlling and adjusting the oil supply pressure of the lubricating system on the integral type extrusion oil film damper, active regulation and control of damping of the integral type extrusion oil film damper are achieved, and vibration of the rotor system is controlled and reduced through damping force. By means of the method, the rotor system can be kept at the low vibration level within the full rotating speed range, waste of lubricating oil of the rotor lubricating system can be reduced, and the economic cost of the rotor system is reduced.

The invention relates to the technical field of aero-engines, in particular to a boss structure optimization method for an elastic ring type squeeze film damper, which comprises the following steps: acquiring an oil film gap of the damper; corresponding circumferential relative oil film force and radial relative oil film force of the damper under different eccentric ratios are obtained; obtaining multiple groups of optimization parameters; constructing a constraint function and a target function; and obtaining an optimal optimization parameter, and obtaining an optimized boss structure. According to the optimization method, the influence of the boss height and the boss width on the circumferential relative oil film force and the radial relative oil film force is considered, and the purposes of improving the circumferential relative oil film force of the damper and reducing the radial relative oil film force of the damper are taken as targets, so that the optimized boss structure can increase the oil film damping, enhance the vibration reduction characteristic and reduce the oil film rigidity; and the influence of the damper additional rigidity on the critical rotating speed is weakened.

The invention discloses an elastic ring type squeeze oil film damper with adjustable rigidity and damping based on memory alloy, belongs to the technical field of vibration control of rotary machinery, and aims to solve the problems that a traditional damper is fixed in structural parameter and poor in adaptability, and the rigidity and damping cannot be adjusted according to the running state, the elastic ring type squeeze oil film damper comprises an outer ring, an inner ring, an oil supply shell and a mouse cage, a memory alloy ring is arranged between the outer ring and the inner ring, a first oil film is formed between the inner ring and the mouse cage, a second oil film is formed between the inner ring and the memory alloy ring, a third oil film is formed between the memory alloy ring and the outer ring, a fourth oil film is formed between the outer ring and the oil supply shell, and a heating structure is arranged on the memory alloy ring. And the temperature of the memory alloy ring is controlled through the heating structure, so that the rigidity of the memory alloy ring and the oil film forms of the second oil film and the third oil film are changed. The damping device is mainly used as a damping device of high-speed rotating equipment which needs to accurately control vibration and rigidity.

A squeeze film damper includes a first component configured to be rigidly coupled to a support structure of a rotating machinery; a second component extending between first and second axial ends, the first axial end facing the first component, the second component having an outer surface configured to be at least partially surrounded by a squeeze film annulus; a journal bearing coupled to the second component for pivoting a rotary shaft; a flexible spoke, wherein the flexible spoke has first and second ends, the first end being rigidly coupled to the first component; the second component including a clearance hole extending in axial direction of the second component starting from the first axial end of the second component, wherein the flexible spoke second end is rigidly coupled to the second component and the flexible spoke extends through the clearance hole.

The invention discloses a squeeze film damper active control method based on RBF neural network PID optimization. The method comprises the following steps: acquiring state parameters of a rotor system through a data acquisition module; inputting the state parameters into an RBF neural network, and performing online optimization on PID control parameters by using the RBF neural network; based on the optimized PID parameters, a piezoelectric ceramic actuator is driven through a piezoelectric ceramic controller, the damping force of the extrusion oil film damper is adjusted, and active control over vibration of the rotor system is achieved. According to the method, RBF neural network nonlinear approximation and PID control stability are fused, the hysteresis and locking problems of traditional passive control are solved, active suppression of rotor system vibration is achieved, and the control precision and reliability are greatly improved.

The invention relates to a non-circular fixed-width curve floating ring oil film damper which comprises a damper shaft neck, a damper outer ring and a floating ring located between the damper shaft neck and the damper outer ring, and the outer ring of the section of the floating ring is a floating ring outer ring fixed-width curve. The inner ring of the section of the damper outer ring is provided with a damper outer ring fixed-width curve matched with the floating ring outer ring fixed-width curve, and an evenly-distributed outer layer oil film is formed between the floating ring and the damper outer ring. A plurality of wedge-shaped gaps which are connected end to end are formed between the floating ring outer ring fixed-width curve and the damper outer ring fixed-width curve, the oil film pressure at the thin positions of the gaps is larger, and return torque is dynamically generated on the floating ring by changes generated by oil film pressure distribution. The defects of the floating ring squeeze film damper in the application of aero-engines are overcome, and the floating ring squeeze film damper is particularly important for improving the technical maturity and application and popularization of FSFDs.

The invention relates to a rigidity suppression and damping enhancement type squeeze film damper which comprises a damper outer ring, a damper inner ring and two sealing expansion rings located between the damper outer ring and the damper inner ring, an oil film is formed between the damper outer ring and the damper inner ring, an oil supply hole communicated to the oil film is formed in the damper outer ring, and the oil supply hole is communicated with the oil film. The sealing device is characterized in that an annular groove is formed in the outer circle of the damper inner ring, the sealing expansion rings are located in the annular groove, a plurality of bosses distributed in the circumferential direction are arranged between the sides, away from each other, of the two sealing expansion rings and the annular groove, and a plurality of leakage grooves distributed in the circumferential direction are formed in the sealing expansion rings. After the leakage channel is innovatively and additionally arranged on the first sealing face or the second sealing face, the amplitude of oil film force is obviously reduced, the mechanical vector of the oil film force is obviously deviated in the tangential direction, then the rigidity of the oil film is greatly reduced, the structural improvement effectively optimizes the dynamic performance of a system by changing the distribution characteristic of the oil film force, and the service life of the system is prolonged. And a good inhibition effect is achieved on the generation of steam cavitation.

The invention provides a multidirectional loading fatigue test device for an integral extrusion oil film damper. The multidirectional loading fatigue test device comprises a tested piece bearing shaft, a sealing shell and a tested piece, the tested piece comprises a handle part and an annular tested piece main body; the handle part is connected with the tested piece main body; an annular tested piece main body is sleeved on the tested piece bearing shaft, and the inner diameter of an inner ring of the tested piece main body is matched with the diameter of the tested piece bearing shaft; the sealing shell encapsulates the tested piece main body; an external force transmission structure is arranged on the handle part; a handle part traction rope fixing structure is arranged at the position, close to the external force transmission structure, of the handle part; a main body traction rope fixing structure is arranged on the tested piece main body; and a traction rope is arranged between the handle traction rope fixing structure and the main body traction rope fixing structure. The device can apply cyclic loads in the horizontal direction and the vertical direction to the test piece at the same time, and the effect that the cyclic loads act on the main body of the tested piece in multiple directions is achieved. The method is applied to the technical field of fatigue experiments.

The application belongs to the field of gear transmission system squeeze film damper damping, especially relates to a kind of gear squeeze film damper damping quick calculation method and system, obtains the structural parameter of squeeze film damper, carries out velocity calculation and constructs the Reynolds equation of squeeze film damper oil film pressure;Based on half-step center finite difference method, the Reynolds equation is solved, and the oil film distribution pressure of oil film damper is obtained;Based on oil film distribution pressure, the oil film counterforce of oil film damper is calculated using double integral algorithm.Compared with the classical short bearing approximate solution and long bearing approximate solution, its use range is wide, and compared with super relaxation iteration method, its calculation efficiency is high.Make it can be used in gear dynamics model to carry out damping analysis.When solving fluid Reynolds equation by finite difference method, only the working condition with regular boundary condition can be processed.Based on variational principle and Galerkin method, a new more general finite element method is proposed to calculate the oil film counterforce of SFD.

A squeeze film damper assembly for a turbine engine includes an annular bearing support and an annular damper housing. The annular bearing support includes an inner support segment and an outer support segment located radially outward of the inner support segment. The inner support segment and the outer support segment are spaced apart to define a support channel therebetween. The annular damper housing is at least partially received in the support channel to define an inner damping chamber and an outer damping chamber, the inner damping chamber being radially inward of the outer damping chamber, the inner damping chamber and the outer damping chamber each capable of being filled with an amount of lubricant to provide a squeeze film damper at the inner damping chamber, the outer damping chamber, or both.

The present disclosure relates to an elastic combined piston ring and a squeeze film damper. Among them, the elastic combined piston ring includes: a first piston ring; a second piston ring axially attached to the first piston ring; a first spring; and a second spring. Wherein, on both sides of the fracture at the joint surface of the first piston ring, a first fracture installation groove is formed, and a first limiting groove is formed at the non-fracture part of the joint surface of the first piston ring. On both sides of the fracture at the joint surface of the second piston ring, a second fracture installation groove is formed, and a second limiting groove is formed at the non-fracture part of the joint surface of the second piston ring. The first spring is installed in the first limiting groove and the second fracture installation groove, and the second spring is installed in the second limiting groove and the first fracture installation groove. The limiting groove not only ensures that the spring cannot axially disengage from the fracture installation groove, but also the cooperation between the limiting groove and the spring can ensure that the installed spring can limit the relative rotation of the two piston rings in the circumferential direction, making it easy for the two piston rings to fit together and improving the sealing effect and damping effect.

The present invention is to provide a bearing device with a squeeze film damper, which is able to obtain high vibration stability, and to provide a centrifugal compressor including the bearing device. A bearing device (1) with a squeeze film damper according to the present invention includes a plurality of pads (3) that constitute a bearing surface supporting a rotating shaft (2), a bearing housing (4) that accommodates the pads (3), a housing (5) that is located outside the bearing housing (4) in a radial direction, and a plurality of squeeze film damper parts (7) arranged in a circumferential direction at a clearance (11) between the bearing housing (4) and the housing (5). Each of the squeeze film damper parts (7) includes a plurality of elastic bodies (6) that repel a radial force. The plurality of elastic bodies (6) are set such that overall stiffness is different between in a vertical direction and in a horizontal direction.

The invention relates to the technical field of aero-engines and gas turbines, and discloses a damper-rotor system dynamics analysis method and system based on an oil supply groove, and the method comprises the steps: constructing a squeeze film damper circumferential oil film force analysis model based on the oil supply groove; the oil film damping coefficient of the squeeze film damper is obtained through analysis according to the circumferential oil film force and the design rotating speed value of the squeeze film damper of the rotor system. The problem that only damper structure parameter design is considered and the influence of oil supply groove design on damper-rotor system dynamics is not introduced into design when a damper of a conventional rotor system is designed is avoided, the dynamic characteristics of the rotor system are further improved, and the vibration reduction effect is improved.

The present invention relates to the technical field of aeroengines and gas turbines, and discloses a dynamic analysis method and system for a damper-rotor system based on an oil supply groove. By constructing a circumferential oil film force analysis model of a squeeze film damper based on the oil supply groove, when designing the damper of the rotor system, the oil film damping coefficient of the squeeze film damper is analyzed and obtained through the circumferential oil film force of the squeeze film damper of the rotor system and the design rotational speed value. It avoids the problem that only the damper structure parameters are considered in the design of the damper of the conventional rotor system without introducing the influence of the oil supply groove design on the dynamics of the damper-rotor system into the design, further improves the dynamic characteristics of the rotor system, and enhances the vibration reduction effect.

The present invention discloses an active control method for a squeeze film damper based on RBF neural network PID optimization. The method comprises the following steps: obtaining rotor system state parameters through a data acquisition module; inputting the state parameters into an RBF neural network, and utilizing the RBF neural network to perform online optimization of the PID control parameters; and, based on the optimized PID parameters, driving a piezoelectric ceramic actuator via a piezoelectric ceramic controller to adjust the damping force of the squeeze film damper, thereby achieving active control of rotor system vibration. By integrating the nonlinear approximation of an RBF neural network with the stability of PID control, the method addresses the hysteresis and locking issues of traditional passive control, achieves active suppression of rotor system vibration, and significantly improves control accuracy and reliability.

The invention relates to a variable-clearance extrusion oil film damper based on an axial stepped oil film ring, belongs to the technical field of rotor vibration control, and solves one of the problems that damping adjustment of a rotor supporting structure in the prior art needs repeated disassembly, the test accuracy is low and the consistency is poor. A stepped oil film ring is arranged on the inner wall face of the oil film outer ring, and a plurality of annular step faces with different depths are machined in the axial direction. A damper oil inlet hole and a damper oil outlet hole which are through are formed in the annular step surface; the oil film outer ring sleeves the outer side of the positioning reference part to form an oil film gap; oil is sealed in the oil film gap to form an annular oil film; the axial positions of the oil film outer ring and the positioning reference part are adjustable; annular step surfaces with different depths are switched to be matched with the positioning reference component to form annular oil films with different thicknesses, and different damping gears can be switched. Quick switching of damping gears is achieved by adjusting axial positioning of the oil film inner ring.

A chip holding device (10) comprises: a chip holding tool (12) which has a holding surface (18) that holds a chip (100) in a contactless manner and a vibration source (30) that applies ultrasonic vibration to the holding surface (18) to form a squeeze film between the holding surface (18) and the chip (100); and a rotation mechanism (40) which rotates the chip holding tool (12) around a specific rotation shaft (46), wherein the rotation shaft (46) is a shaft that is for rotating the chip (100) in a direction in which the chip (100) is turned upside down and that is set in an area other than an area in which the holding surface (18) is pushed out in a direction opposite to the chip (100).

The present invention relates to an anti-surge two-stage centrifugal compressor motor structure, which is characterized in that: it includes a motor shaft, a rotary bearing, an squeeze film damper, an impeller, an adapter plate and an anti-surge volute; a wind guiding hole structure with a gradually reducing diameter in a trumpet shape is arranged at the air inlet of the volute, which reduces the irreversible conversion of velocity energy and pressure energy into internal energy, reduces mixing loss, and improves the efficiency of the volute connection; the setting of the wind guiding holes in this structure broadens the flow rate of the compressor impeller, avoiding the occurrence of compressor surge and blockage; an squeeze film damper is arranged on the motor shaft, and the squeeze film damper is used to buffer the vibration impact on the air compressor when surge occurs, improving the service life of the air compressor; the adopted squeeze film damper is designed in cooperation with the oil passage lubrication module, fitting the oil passage lubrication module and having a compact connection; the chamfer structure and arc-shaped groove are opened, which can have a small space margin when the surge phenomenon occurs, avoiding interference with the edge of the rotary bearing.

The present application belongs to the field of engine testing technology, and specifically relates to a vibration suppression effect test device for a squeeze film damper. The device comprises a rotor shaft (7), the first end of which is supported by a first support (11) and a second support (12), and the second end is supported by a third support (13); a cantilever disk fixed to the first end of the rotor shaft (7) for simulating a power turbine disk; an elastic support (6), which comprises a ring plate (61) and a support arm (62), the inner end of the ring plate (61) being rotatably connected to the rotor shaft (7), an oil film cavity (63) being formed between the outer end of the ring plate (61) and the first support (11), and the support arm (62) being connected to the second support (12); the first support (11) being a height-adjustable support, and having a through hole thereon that penetrates the oil film cavity (63). The present application achieves similarity with actual structure and dynamics, and can carry out real-size vibration suppression effect test research for a squeeze film damper.

The invention relates to a squeeze film damper for a motor of a centrifugal compressor and an assembly structure of the squeeze film damper. The squeeze film damper is characterized by comprising a squirrel cage shell, a pivotal bearing, a squeeze film damper body, a bearing retainer, a lubricating oil duct module and a sealing module. The motor end cover is provided with the auxiliary oil duct unit, the auxiliary oil duct unit and the motor end cover form split type double oil inlet holes, the two oil inlet holes are used for oiling and lubricating the side face and the outer contour of the slewing bearing respectively, and the structure of the auxiliary oil duct unit can facilitate cleaning and follow-up maintenance of an oil duct. In order to ensure the installation of the squeeze film damper on the motor end cover, the newly designed squeeze film damper is provided with a U-shaped notch, so that interference can be avoided; in order to avoid interference between the extrusion oil film damper and an outer sealing bayonet and interference between the extrusion oil film damper and a motor shell, a straight chamfer and an outer arc-shaped groove are arranged on the flange plate. In order to avoid interference between the extrusion oil film damper and the outline of the pivotal bearing, an inner arc-shaped groove is formed in the extrusion oil film damper.

The present invention relates to the technical field of leakage detection of squeeze film dampers, and particularly relates to a measuring device and a measuring method. The measuring device includes: a support device; a damper, mounted on the support device, and including an outer ring, an inner ring, and two piston rings. The outer ring is sleeved outside the inner ring. Two axially spaced grooves are provided on the outer wall of the inner ring. The two piston rings are respectively arranged in the two grooves, and together with the inner ring and the outer ring, they enclose an oil film cavity. An oil injection hole communicating with the oil film cavity is provided on the outer ring. The piston ring has two free ends with an opening therebetween. A glue injection channel is provided on the axial side of the piston ring away from the other piston ring. When the glue injection channel is blocked by sealant, it prevents the oil from leaking through the gap between the piston ring and the inner wall of the outer ring; and an oil receiving device, arranged below the damper, for collecting the oil leaked from the damper. Based on this, the measurement of the leakage amount of the squeeze film damper can be conveniently realized.

The invention discloses an aerostatic bearing for an aluminum alloy melt rotary blowing degasser, the aerostatic bearing is mounted on a shaft, an inert gas input hole is formed in the shaft, the aerostatic bearing comprises a bearing inner body and a bearing outer body, the bearing outer body is provided with an air inlet and an annular air cavity, and the air inlet is communicated with the annular air cavity. A plurality of throttling holes communicated with the annular air cavity, an air storage cavity and a plurality of damping holes are formed in the bearing inner body; the two ends of each throttling hole are communicated with the air cavity and the damping hole respectively, each damping hole is communicated with the air storage cavity, and the air storage cavity is located on the bearing working face. When the aerostatic bearing is subjected to external impact and vibrates, the extrusion film effect of air in the air storage cavity plays a role of an air spring, and the damping capacity of the aerostatic bearing is effectively improved in combination with friction damping of the multiple damping holes; the combined action of the air spring action of the air storage cavity and the friction damping action of the damping hole can increase the loading capacity, and the device can adapt to the working environment with the large load of the molten aluminum rotary injection machine.

To make it possible to early detect abnormalities in a bearing device with a squeeze film damper, and make it possible to determine their causes.SOLUTION: A bearing device 1 with a squeeze film damper comprises a main bearing 2 supporting a rotating shaft 4, a bearing housing 7 constituting an outer peripheral part of the main bearing 2, a housing 9 provided on an outer peripheral side of the bearing housing 7, a squeeze film damper part 3 provided in a gap between the bearing housing 7 and the housing 9, a relative displacement measurement sensor 15 for measuring a relative displacement 17 of the rotating shaft 4, an absolute displacement measurement sensor 16 for measuring an absolute displacement 18 of the rotating shaft 4, and an abnormality detection part 31. The abnormality detection part 31 calculates a correlation between the relative displacement 17 and the absolute displacement 18, analyzes a change in the correlation, and detects abnormalities of the main bearing 2 and the squeeze film damper part 3.SELECTED DRAWING: Figure 1

The invention relates to the technical field of aero-engines, and discloses a squeeze film damper and rotating shaft mounting assembly and an aero-engine rotor. The squeeze film damper is used for a multi-fulcrum rotor with a centering function. The squeeze film damper and rotating shaft mounting assembly comprises a rotating shaft, a bearing, a bearing mounting assembly, a sealing ring, an oil film gap and a lubricating oil passage. An oil film gap is defined by the bearing outer ring, the bearing installation assembly and the sealing ring, the bearing installation assembly forms a lubricating oil passage communicating the outside with the oil film gap, and external lubricating oil can enter the oil film gap through the lubricating oil passage to form an extrusion oil film. According to the squeeze film damper and rotating shaft installation assembly, a centering elastic support is abandoned, the structure is simplified, the weight is reduced, and disassembly and assembly are convenient; the oil film gap is integrated into an enclosed structure of the bearing installation assembly, the bearing outer ring of the bearing and the sealing ring, redundant parts are omitted, the overall structure is further simplified, and the space occupied by installation is reduced.

A squeeze film damper arranged at a bearing comprises a squeeze film damper outer ring connected to a bearing outer ring of the bearing in a sleeving mode, and an oil inlet penetrating through the squeeze film damper outer ring is formed in the squeeze film damper outer ring; the pair of oil sealing rings is arranged between the outer ring of the squeeze film damper and the outer ring of the bearing; an oil film cavity is defined by the extrusion oil film damper outer ring, the bearing outer ring and the paired oil sealing rings in a surrounding mode. Wherein a non-return assembly is arranged in the oil inlet and comprises a plug piece and a spring, the spring abuts against the plug piece and the oil inlet, the plug piece can move between a through-flow position and a blocking position, when oil pressure in the oil film cavity exceeds a threshold value, the plug piece enters the blocking position from the through-flow position, and in the through-flow position, the plug piece does not block the oil inlet; lubricating oil is allowed to enter the oil film cavity through the oil inlet; in the blocking position, the oil inlet is blocked by the plug piece, and lubricating oil is prevented from entering and exiting from the oil inlet. The squeeze film damper can maintain the damping performance when an engine is subjected to an impact load.

A turbocharger, having a shaft coupled to a compressor wheel on a first end, and coupled to a turbine wheel on a second end; a center housing enveloping the shaft, having a first housing end proximate to the compressor wheel and a second housing end proximate to the turbine wheel; a compressor housing enveloping the compressor wheel and coupled with the center housing, having a compressor inlet and a compressor outlet; a turbine housing enveloping the turbine wheel and coupled with the center housing, having a turbine inlet and a turbine outlet; and a squeeze film damper disposed within the center housing disposed about the shaft and configured to center the shaft within the center housing, the squeeze film damper further including a cylindrical body; a cylindrical flange; a rib connecting the cylindrical body and the cylindrical flange; a bearing disposed within the cylindrical body.

This technology enables stable, high-speed rotation of the impeller in multi-stage centrifugal compressors for hydrogen applications. [Solution] The multi-stage centrifugal compressor for hydrogen comprises a rotating shaft, a plurality of impellers through which the rotating shaft is inserted and which rotate integrally with the rotating shaft, a casing housing the rotating shaft and the plurality of impellers, and journal bearings positioned at both ends of the rotating shaft to support the rotating shaft in the casing, and compresses hydrogen gas in multiple stages with the plurality of impellers. The plurality of impellers are closed impellers made of aluminum alloy with hydrogen embrittlement resistance. The journal bearing is a squeeze film damper bearing having a bearing portion that supports the rotating shaft and a squeeze film damper portion positioned between the bearing portion and the casing.

The application provides a sealed shear thickening fluid extrusion oil film damper, which comprises a damper inner ring and a damper outer ring which is sealed to the outside of the damper inner ring, the inside of the damper inner ring is connected with a rotor through a bearing, and a gap is formed between the inner wall of the damper outer ring and the outer wall of the damper inner ring, the gap is filled with a working medium, and the working medium is shear thickening fluid; a working medium filling structure is arranged on the damper outer ring and is used for realizing injection and suction of the shear thickening fluid in the gap. The sealed shear thickening fluid extrusion oil film damper does not need a more complex working medium circulating system device, the dependence on a complex structure is reduced, and the damper has a wider engineering application.

The utility model relates to a composite squeeze film damper for a vertical rotor overspeed tester, which belongs to the technical field of high-speed rotation test equipment and comprises a bearing gland, a damping seat, a bearing sleeve, damping particles, a bearing, a retainer ring and an oil supply and return path. Two bearings in the bearing sleeve are respectively arranged at the upper end and the lower end of the check ring and are connected with the bearing sleeve; the bearing sleeve is of a cavity structure, and an inner cavity of the bearing sleeve is used for being filled with damping particles. The bearing sleeve is mounted in the damping seat through large clearance fit; an oil film is formed after oil is filled between the damping seat and the bearing sleeve; the bearing gland is fixed on the damping seat and compresses the bearing; counter bores are respectively formed in the center of the bottom surface of the bearing gland and the center of the inner side of the bottom end of the damping seat, and framework oil seals are respectively mounted in the counter bores; the oil supply and return oil way provides lubricating oil for the bearing and the oil film. According to the utility model, the problems of'bistable jumping 'and'locking' caused by overlarge vibration amplitude of the inner ring of the squeeze film damper under high-frequency and large-amplitude working conditions are solved.