The model utility content
The purpose of this utility model is: propose a kind of compression stiffness and radial rigidity of can realizing and realize the rubber bearing of coupling in a big way.
The technical solution of the utility model is: a kind of rubber bearing, it comprises little joint, one group of spherical metal partition, transition metal spare, some layers of flat metal partition, large joint, described spherical metal partition is integral by the spherical rubber layer is bonding, and spherical metal partition one end that is bonded as one links to each other with little joint, the other end links to each other with transition metal spare, be bonded as one by dull and stereotyped rubber layer between the described flat metal partition, and flat metal partition one end that is bonded as one links to each other with transition metal spare, the other end links to each other with large joint, wherein, spherical rubber layer total thickness and dull and stereotyped rubber layer total thickness ratio are between 1.0~10.0.
The number of plies of described spherical metal partition is 4~10 layers, and the flat metal partition is 1~6 layer.
The thickness of described spherical metal partition, flat metal partition is 0.5mm~1.5mm, and thickness deviation is controlled at ± 0.1mm.
Spherical metal partition bondline thickness peace plate rubber layer thickness is 0.5mm~2.0mm.
Each spherical metal partition is the same centre of sphere, the spherical metal partition becomes greatly to the area the middle transition metal structure gradually from little joint, between minimum spherical metal partition and the little joint, reach between each spherical partition between the maximum spherical partition of one deck and the middle transition metal structure and all be integral through bonding by Vulcanization by rubber layer.
Has a metal boss between large joint and the dull and stereotyped rubber layer.
The center of described large joint, little joint, spherical metal partition, flat metal partition and transition metal spare all has through hole, and each through hole is coaxial after integral body of the bonding one-tenth of glue-line.
Described each spherical rubber layer thickness should guarantee evenly and the same centre of sphere that each dull and stereotyped rubber layer thickness should guarantee evenly and be parallel to each other.
The spherical metal partition takes fillet to process at the transition position of sphere and crimping, and inner circle radius R 1 is got R0.5mm~R3mm, and exradius R2 gets R0.5mm~R4mm.
The utility model has the advantages that: the utility model rubber bearing adopts Multi-layer spherical bearing and multicolumn oblique crank Z to hold compound, by control spherical metal partition, the number of plies of flat metal partition and the thickness of each glue-line, keeping under the constant prerequisite of interface and apparent size, can in larger load range, realize the coupling of compression stiffness and radial rigidity, satisfy the lifting airscrew system to the resilient bearing compression stiffness, wave the different designs requirement of rigidity, torsional stiffness and radial rigidity, and should design freedom and flexibility, simple in structure, processing cost is low, and moulding is easy.
Embodiment
The below is described in further details the utility model.
Referring to Fig. 1~Fig. 4, wherein, Fig. 1 is the structural representation of the utility model rubber bearing the first mode of execution, and Fig. 2 is the plan view of Fig. 1, and Fig. 3 is the worm's eye view of Fig. 1, and Fig. 4 is the A-A sectional view of Fig. 1.In the present embodiment, described rubber bearing comprises rubber layer between one group of spherical metal partition, some layers of flat metal partition and the partition and banjo connector, transition metal spare.
Described one group of spherical metal partition 3 is after spherical rubber layer 2 bonding by Vulcanization are integral, each spherical metal partition is with the centre of sphere, the thickness of each spherical metal partition is uniform, the spherical metal partition becomes gradually from little joint to area the transition metal spare greatly, between minimum spherical metal partition and the little joint, reach between each spherical metal partition between maximum one deck spherical metal partition and the transition metal spare and all be integral through bonding by Vulcanization by rubber layer.
The thickness of described flat metal partition 6 is uniform, after being integral, dull and stereotyped rubber layer 5 bonding by Vulcanizations are parallel to each other between each partition, and the flat metal partition of below is mutually cementing through rubber layer and transition metal spare, the flat metal partition of the top is mutually cementing with large joint through rubber layer, and is integral through bonding by Vulcanization.
The center of described large joint 7, little joint 1, spherical metal partition 3, flat metal partition 6 and transition metal spare 4 all has circular hole, and the center hole of all metalworks each metalwork after integral body of the bonding one-tenth of glue-line is coaxial.
Described spherical rubber layer 2, dull and stereotyped rubber layer 5 thickness can be identical, also can be different, and each spherical rubber layer thickness should guarantee evenly and the same centre of sphere that each dull and stereotyped rubber layer 5 thickness should guarantee evenly and be parallel to each other.But spherical rubber layer total thickness and dull and stereotyped rubber layer total thickness ratio are controlled between 1.0~10.0, thereby with in larger load range, realize the coupling of compression stiffness and radial rigidity.
The number of plies of described spherical metal partition is 4~10 layers, and the flat metal partition is 1~6 layer.The thickness of described spherical metal partition 3, flat metal partition 6 is 0.5mm~2mm, and thickness deviation is controlled at ± 0.1mm, and its material is stainless steel, alloyed steel, aluminum alloy or titanium alloy.The material of described large joint 7, little joint 1, transition metal spare 4 is stainless steel, aluminum alloy, titanium alloy.
Described spherical metal partition 3 should carry out the fillet processing at the transition position of sphere and crimping, as shown in Figure 5, under the condition that technique satisfies, should reduce the size of inner circle radius R 1, exradius R2 as far as possible, usually R1 gets R0.5mm~R3mm according to metalwork thickness and moulding process, and R2 gets R0.5mm~R4mm.
Working principle of the present utility model is: the large joint 7 of rubber bearing be connected joint 1 and be connected with flexible beam with the bearing oversleeve of helicopter respectively.The dynamic load that the blade rotation causes is delivered to little joint through flexible beam, then is delivered to step by step large joint through each rubber layer, and the distortion of each rubber layer is played the buffering transitional function to dynamic load, thereby reduces the vibration of fuselage.Since the dynamic load that blade rotation causes show as when being delivered to the little joint of bearing bear simultaneously centrifugal, reverse, wave, the complexity stack alternate load that the footpath makes progress, being usually expressed as rubber layer the working life of bearing fatigue crack occurs and deepens gradually expansion finally causing bearing failure, and the fatigue crack of rubber layer is in close relations with the equivalent strain under the stack alternate load, one party to rigidity too high, can affect the integral vibration damping performance of bearing, rigidity is excessively low, can cause the rubber layer strain excessive, reduce the working life of bearing, therefore all can provide the stiffness index requirement of all directions to bearing according to the actual dynamic load of blade, the utility model is under the prerequisite that satisfies bearing interface and basic apparent size, ratio by control spherical metal partition glue-line total thickness and flat metal partition glue-line total thickness, realized the coupling of compression stiffness and radial rigidity in a big way, simultaneously on torsional stiffness with wave rigidity and do not have large impact, can carry out flexible optimal design to the different-stiffness design objective that bearing proposes, satisfy the rigidity property designing requirement.
Embodiment one
A kind of rubber bearing is such as Fig. 1~shown in Figure 5.Little joint 1, large joint 7, transition metal spare 4 are aluminum alloy material, spherical metal partition 3 is stainless steel material, thickness is 0.6mm, the thickness deviation scope control is in ± 0.1mm, one group of spherical metal partition is 7, increase step by step to transition metal spare area from little joint, each spherical metal partition outer rim is all with crimping, in forming process, by crimping and centralized positioning pin each spherical metal partition is accurately controlled in the partition location and keep the same centre of sphere, coaxial, thereby guarantee that each spherical rubber layer is with the centre of sphere and even thickness.
The dull and stereotyped circular partition that flat metal partition 6 is made for stainless steel material, thickness is 0.6mm, the thickness deviation scope control is in ± 0.1mm, each flat metal partition shape and size are all identical, 2 layers altogether of flat metal partitions, the thickness evenness of each dull and stereotyped rubber layer and the parallelism between glue-line are by flat metal partition planeness and precise forming mold common guarantee.In addition, have a metal boss between large joint and the dull and stereotyped rubber layer, control dull and stereotyped rubber layer thickness to be used for regulating.
Little joint 1 center has when tapped hole is used for assembling and connects, tapped hole runs through little joint 1, center at other metalworks has through hole, the central through bore of spherical metal partition 3, flat metal partition 6 and its outer rim should have good alignment, behind rubber curing forming, it is coaxial that the center hole of all metalworks keeps.
The bondline thickness that is connected with each spherical metal partition is identical, and the bondline thickness that is connected with each dull and stereotyped circular partition is identical, and spherical rubber layer 2 total thickness and dull and stereotyped rubber layer 5 total thickness ratios are 3.5.
Spherical metal partition 3 carries out the fillet processing at the transition position of sphere and crimping, and R1 is 2mm, and R2 is 3mm.
The compression stiffness that test records this airframe bearing is 4660N/mm, and radial rigidity is 236N/mm, and the ratio of compression stiffness and radial rigidity is 19.7, can satisfy the Rigidity Matching designing requirement under the larger radial load condition.
Embodiment two
A kind of rubber bearing is such as Fig. 6, shown in Figure 7.Little joint 1, large joint 7, transition metal spare 4 are aluminum alloy material, spherical metal partition 3 is stainless steel material, thickness is 0.6mm, the thickness deviation scope control is in ± 0.1mm, one group of spherical metal partition is 7, increase step by step to transition metal spare area from little joint, each spherical metal partition outer rim is all with crimping, in forming process, by crimping and centralized positioning pin each spherical metal partition is accurately controlled in the partition location and keep the same centre of sphere, coaxial, thereby guarantee that each spherical rubber layer is with the centre of sphere and even thickness.
The dull and stereotyped circular partition that flat metal partition 6 is made for stainless steel material, thickness is 0.6mm, the thickness deviation scope control is in ± 0.1mm, each dull and stereotyped circular partition shape and size are all identical, 4 layers altogether of dull and stereotyped circular partitions, the thickness evenness of each dull and stereotyped rubber layer and the parallelism between glue-line are by flat metal partition planeness and precise forming mold common guarantee.
Little joint 1 center has when tapped hole is used for assembling and connects, tapped hole runs through little joint 1, center at other metalworks has through hole, the central through bore of spherical metal partition 3, dull and stereotyped circular partition 6 and its outer rim should have good alignment, behind rubber curing forming, it is coaxial that the center hole of all metalworks keeps.
The bondline thickness that is connected with each spherical metal partition is identical, and the bondline thickness that is connected with each dull and stereotyped circular partition is identical, and spherical rubber layer 2 total thickness and dull and stereotyped rubber layer 5 total thickness ratios are 1.5.
Spherical metal partition 3 has carried out the fillet processing at the transition position of sphere and crimping, and R1 is 2mm, and R2 is 3mm.
The compression stiffness that test records this airframe bearing is 3070N/mm, and radial rigidity is 120N/mm, and the ratio of compression stiffness and radial rigidity is 25.6, can satisfy than the Rigidity Matching designing requirement of path under the load-up condition.