CN105270624A - Bifilar-pendulum vibration absorber of helicopter rotor - Google Patents
Bifilar-pendulum vibration absorber of helicopter rotor Download PDFInfo
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- CN105270624A CN105270624A CN201510742653.1A CN201510742653A CN105270624A CN 105270624 A CN105270624 A CN 105270624A CN 201510742653 A CN201510742653 A CN 201510742653A CN 105270624 A CN105270624 A CN 105270624A
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Abstract
The invention discloses a bifilar-pendulum vibration absorber of a helicopter rotor, and relates to the technical field of helicopters. The bifilar-pendulum vibration absorber of the helicopter rotor is used for being connected with a rotor hub, and comprises a central support, counterweight blocks and connecting components, wherein the central support is provided with a center part and supporting arms; the center part is fixedly connected with the rotor hub; the supporting arms and the center part are integrally formed, and first two-curve holes are formed in each supporting arm; second two-curve holes are formed in each counterweight block; the central support is connected with the counterweight blocks through the connecting components; each counterweight block can swing around the corresponding connecting components along the corresponding first two-curve holes or the corresponding second two-curve holes. The bifilar-pendulum vibration absorber disclosed by the invention has the beneficial effects that the inherent frequency of the bifilar-pendulum vibration absorber is in direct proportion to the rotating speed of the rotor; when the rotating speed of the rotor changes, the set maximum frequency ratio can be kept, so that the vibration absorber can be adjusted along with the rotating speed of the rotor, and is valid to different rotating speeds of the rotor; the vibration absorber is simple in structure, and has a good vibration absorbing effect.
Description
Technical field
The present invention relates to Helicopter Technology field, be specifically related to a kind of lifting airscrew bifilar pendulum bump leveller.
Background technology
Rotor is as one of the three large dynamic components of helicopter, and in its high-speed rotation, being easily coupled with body natural frequency causes helicopter to produce vibrating.At the beginning of design and development, just higher requirement is proposed to the level of vibration of full machine, and overall configuration design adopts master to subtract rigidly connected form, and the level of vibration of fuselage may be caused higher.The damping technology being applied in helicopter at present comprises body dynamic vibration absorber, Active Vibration Control, rotor power absorbing.Rotor power absorbing technology is not yet applied on domestic helicopter.
Summary of the invention
The invention provides a kind of lifting airscrew bifilar pendulum bump leveller, with the vibration problem solved or at least existing for the helicopter described in mitigation technique background.
The technical solution used in the present invention is: provide a kind of lifting airscrew bifilar pendulum bump leveller, for being connected with rotor hub, comprise center support, clump weight and coupling assembling, wherein, described center support is provided with central part and support arm, described central part is fixedly connected with rotor hub, described support arm and described central part one-body molded, and support arm is provided with the first hyperbolic string holes; Described clump weight is provided with the second hyperbolic string holes; Described center support is connected by coupling assembling with described clump weight, and clump weight can swing along described first hyperbolic string holes or the second hyperbola around described coupling assembling.
Preferably, described coupling assembling comprises tie bolt, lining, cone sheets and nut, and described lining is provided with 3, cone sheets is provided with two, described lining and cone sheets are set on described bolt, and are fixed by described nut, and the both sides of each described cone sheets are provided with lining.
Preferably, described cone sheets is circular configuration, and its center is provided with through hole, and two sides are symmetrical arranged, and the thickness of described cone sheets evenly successively decreases from the center to the edge of cone sheets.
Preferably, described central part is loop configuration, and one end is provided with end cap, and the center of described end cap is provided with through hole, and described end cap is provided with connecting bore the circumferencial direction of described through hole is uniform.
Preferably, described support arm is provided with 5, the uniform setting of excircle in support arm centrally portion.
Preferably, described support arm is provided with lightening hole.
Preferably, described clump weight comprises a base plate and two side plates, described two side plates and described base plate one-body molded, and side plate is vertical with base plate, and two side plates are parallel to each other, and the distance between two side plates is greater than the thickness of described support arm.
Preferably, described lifting airscrew bifilar pendulum bump leveller comprises tab further, and described tab is fixed on described clump weight.
Preferably, the support arm of described center support comprises further the first hyperbola lining, the center of the first hyperbola lining is provided with hyperbolic string holes, and outside is cylindrical, support arm is provided with support arm through hole, described first hyperbola lining is arranged in described support arm through hole.
Preferably, described clump weight is provided with the second hyperbola lining, the center of described second hyperbola lining is provided with hyperbolic string holes, and outside is cylindrical, described clump weight is provided with clump weight through hole, described second hyperbola lining is arranged in described clump weight through hole.
Beneficial effect of the present invention is:
The support arm of center support of the present invention is provided with the first hyperbolic string holes, clump weight is provided with the second hyperbolic string holes, center support is connected by coupling assembling with clump weight, and clump weight can swing along described first hyperbolic string holes or the second hyperbola around coupling assembling.The natural frequency of this bump leveller is directly proportional to gyroplane rotate speed, still can keep the maximum frequency ratio set when gyroplane rotate speed changes, thus can be tuning with gyroplane rotate speed, and all effective to different gyroplane rotate speeds, structure is simple, shock attenuation result good.
The support arm of center support of the present invention is provided with the first hyperbola lining, after the hyperbolic string holes wearing and tearing at the first hyperbola lining center, only can change the first hyperbola lining, it is convenient to change, and use cost is low.
Clump weight of the present invention is provided with the second hyperbola lining, after the hyperbolic string holes wearing and tearing at the second hyperbola lining center, only can change the second hyperbola lining, it is convenient to change, and use cost is low.
Clump weight of the present invention is provided with tab, by changing the weight of tab, can finely tunes the weight of clump weight, making shock attenuation result reach optimum regime.
The support arm of center support of the present invention is provided with lightening hole, the weight of whole bump leveller can be alleviated.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the lifting airscrew bifilar pendulum bump leveller of one embodiment of the invention;
Fig. 2 is the schematic diagram of the center support of the lifting airscrew bifilar pendulum bump leveller shown in Fig. 1;
Fig. 3 is the schematic diagram of the clump weight of the lifting airscrew bifilar pendulum bump leveller shown in Fig. 1;
Fig. 4 is the schematic diagram of the coupling assembling of the lifting airscrew bifilar pendulum bump leveller shown in Fig. 1;
Fig. 5 is the center support of lifting airscrew bifilar pendulum bump leveller shown in Fig. 1 and the connection enlarged drawing of clump weight.
Wherein, 1-center support, 2-clump weight, 3-coupling assembling, 4-tab, 11-connecting portion, 12-support arm, 121-first hyperbolic string holes, 122-first hyperbola lining, 123-lightening hole, 21-second hyperbolic string holes, 22-second hyperbola lining, 31-bolt, 32-lining, 33-cone sheets, 34-nut.
Detailed description of the invention
For making object of the invention process, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is further described in more detail.In the accompanying drawings, same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Described embodiment is the present invention's part embodiment, instead of whole embodiments.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.Below in conjunction with accompanying drawing, embodiments of the invention are described in detail.
In describing the invention; it will be appreciated that; term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward " etc. instruction orientation or position relationship be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply indication device or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limiting the scope of the invention.
As shown in Figures 1 to 5, a kind of lifting airscrew bifilar pendulum bump leveller, for being connected with rotor hub, comprise center support 1, clump weight 2 and coupling assembling 3, wherein, center support 1 is provided with central part 11 and support arm 12, and central part 11 is fixedly connected with rotor hub, support arm 12 is one-body molded with central part 11, and support arm 12 is provided with the first hyperbolic string holes 121; Clump weight 2 is provided with the second hyperbolic string holes 21; Center support 1 is connected by coupling assembling 3 with clump weight 2, and clump weight 2 can swing along described first hyperbolic string holes 121 or the second hyperbola 21 around coupling assembling 3.
Be understandable that, the version of center support 1 changes according to the structure difference of rotor hub, is not limited in described in the present embodiment.
In the present embodiment, coupling assembling 3 comprises tie bolt 31, lining 32, cone sheets 33 and nut 34, lining 32 is provided with 3, cone sheets 33 is provided with two, lining 32 and cone sheets 33 are set on bolt 31, and fixed by nut 34, the both sides of each described cone sheets 33 are provided with lining 32.Coupling assembling 3, for connecting clump weight 2 and center support 1, makes clump weight 2 can swing along the first hyperbolic string holes 121 or the second hyperbola 21 around coupling assembling 3.
Be understandable that, the version of coupling assembling 3 can also set according to actual conditions.Such as, in an alternative embodiment, lining 32 and cone sheets 33 are integrated machine-shaping, and its advantage is: decrease number of parts, install simple.
Cone sheets 33 is circular configuration, and its center is provided with through hole, and two sides are symmetrical arranged, and the thickness of cone sheets 33 evenly successively decreases from the center to the edge of cone sheets 33.
The central part 11 of center support 1 is loop configuration, and one end is provided with end cap, and the center of end cap is provided with through hole, and end cap is provided with connecting bore the circumferencial direction of described through hole is uniform, and described connecting bore is used for being connected with rotor hub.
Be understandable that, the version of the central part 11 of center support 1 is not limited in version disclosed in the present embodiment.The version of central part 11 can set according to the version of rotor hub.
In the present embodiment, the support arm 12 in center support 1 is provided with 5, the uniform setting of excircle in support arm 12 centrally portion 11.
Be understandable that, the quantity of support arm 12 is not limited in 5 described in the present embodiment, and the quantity of support arm 12, according to multi-form rotor hub, is provided with the support arm 12 of varying number.
Support arm 12 is provided with lightening hole 123.Its advantage is, arranges the weight that lightening hole 123 can alleviate center support 1.
In the present embodiment, clump weight 2 comprises a base plate and two side plates, two side plates and the machine-shaping of base plate one, and side plate is vertical with base plate, and two side plates are parallel to each other, and the distance between two side plates is greater than the thickness of support arm 12.
Clump weight 2 is in installation process, and the support arm 12 in center support 1 is placed between two side plates of clump weight 2, and is connected by coupling assembling 3.Clump weight 2 in the axis of coupling assembling 3 and can radially wobble relative to center support 1.Clump weight 2 is swing along the first hyperbolic string holes 121 or the second hyperbolic string holes 21 around coupling assembling 3 relative to center support 1 in the swing of the radial direction of coupling assembling 3.
In the present embodiment, lifting airscrew bifilar pendulum bump leveller comprises tab 4 further, and tab 4 is fixed on clump weight 2.The advantage arranging tab 4 is: different according to the vibration of different model aircraft, can be regulated the weight of clump weight 2, regulate simple and convenient by the weight changing tab 4.
In the present embodiment, the center support arm 12 of center support 1 comprising further the first hyperbola lining 122, first hyperbola lining 122 is provided with the first hyperbolic string holes, and outside is cylindrical, support arm 12 is provided with support arm through hole, the first hyperbola lining 122 is arranged in described support arm through hole.
Advantage support arm 12 being arranged the first hyperbola lining 122 is: after bifilar pendulum bump leveller uses for a long time, and the first hyperbolic string holes there will be wearing and tearing, only needs replacing first hyperbola lining 122, and it is convenient to change, and use cost is low.
In the present embodiment, center clump weight 2 being provided with the second hyperbola lining 22, second hyperbola lining 22 is provided with the second hyperbolic string holes, and outside is cylindrical, clump weight 2 is provided with clump weight through hole, the second hyperbola lining 22 is arranged in described clump weight through hole.
Advantage clump weight 2 being provided with the second hyperbola lining 22 is: clump weight 2 is after long-time swing, and the second hyperbolic string holes there will be wearing and tearing, only needs replacing second hyperbola lining 22, and it is convenient to change, and use cost is low.
Finally it is to be noted: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit.Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a lifting airscrew bifilar pendulum bump leveller, for being connected with rotor hub, is characterized in that: comprise center support (1), clump weight (2) and coupling assembling (3), wherein,
Described center support (1) is provided with central part (11) and support arm (12), described central part (11) is fixedly connected with rotor hub, described support arm (12) is one-body molded with described central part (11), and support arm (12) is provided with the first hyperbolic string holes (121);
Described clump weight (2) is provided with the second hyperbolic string holes (21);
Described center support (1) is connected by coupling assembling (3) with described clump weight (2), and clump weight (2) can swing along described first hyperbolic string holes (121) or the second hyperbola (21) around described coupling assembling (3).
2. lifting airscrew bifilar pendulum bump leveller according to claim 1, it is characterized in that: described coupling assembling (3) comprises tie bolt (31), lining (32), cone sheets (33) and nut (34), described lining (32) is provided with 3, cone sheets (33) is provided with two, described lining (32) and cone sheets (33) are set on described bolt (31), and fixed by described nut (34), the both sides of each described cone sheets (33) are provided with lining (32).
3. lifting airscrew bifilar pendulum bump leveller according to claim 2, it is characterized in that: described cone sheets (33) is circular configuration, its center is provided with through hole, two sides are symmetrical arranged, and the thickness of described cone sheets (33) evenly successively decreases from the center to the edge of cone sheets (33).
4. lifting airscrew bifilar pendulum bump leveller according to claim 1, it is characterized in that: described central part (11) is loop configuration, and one end is provided with end cap, the center of described end cap is provided with through hole, and described end cap is provided with connecting bore the circumferencial direction of described through hole is uniform.
5. lifting airscrew bifilar pendulum bump leveller according to claim 4, is characterized in that: described support arm (12) is provided with 5, the uniform setting of excircle of support arm (12) centrally portion (11).
6. lifting airscrew bifilar pendulum bump leveller according to claim 5, is characterized in that: described support arm (12) is provided with lightening hole (123).
7. lifting airscrew bifilar pendulum bump leveller according to claim 1, it is characterized in that: described clump weight (2) comprises a base plate and two side plates, described two side plates and described base plate one-body molded, and side plate is vertical with base plate, two side plates are parallel to each other, and the distance between two side plates is greater than the thickness of described support arm (12).
8. lifting airscrew bifilar pendulum bump leveller according to claim 1, it is characterized in that: described lifting airscrew bifilar pendulum bump leveller comprises tab (4) further, and described tab (4) is fixed on described clump weight (2).
9. lifting airscrew bifilar pendulum bump leveller according to claim 1, it is characterized in that: the support arm (12) of described center support (1) comprises further the first hyperbola lining (122), the center of described first hyperbola lining (122) is provided with the first hyperbolic string holes, outside is cylindrical, (12) are provided with support arm through hole to support arm, and described first hyperbola lining (122) is arranged in described support arm through hole.
10. lifting airscrew bifilar pendulum bump leveller according to claim 1, it is characterized in that: described clump weight (2) is provided with the second hyperbola lining (22), the center of described second hyperbola lining (22) is provided with the second hyperbolic string holes, outside is cylindrical, (2) are provided with clump weight through hole to described clump weight, and described second hyperbola lining (22) is arranged in described clump weight through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510742653.1A CN105270624A (en) | 2015-11-04 | 2015-11-04 | Bifilar-pendulum vibration absorber of helicopter rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510742653.1A CN105270624A (en) | 2015-11-04 | 2015-11-04 | Bifilar-pendulum vibration absorber of helicopter rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105270624A true CN105270624A (en) | 2016-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510742653.1A Pending CN105270624A (en) | 2015-11-04 | 2015-11-04 | Bifilar-pendulum vibration absorber of helicopter rotor |
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| CN (1) | CN105270624A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108698708A (en) * | 2017-08-31 | 2018-10-23 | 深圳市大疆灵眸科技有限公司 | Vibration absorber and clouds terrace system |
| CN114112268A (en) * | 2021-11-23 | 2022-03-01 | 中国直升机设计研究所 | Vibration damping verification device and vibration damping verification method for double-line pendulum vibration absorber |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4145936A (en) * | 1976-01-20 | 1979-03-27 | Westland Aircraft Limited | Vibration absorbers |
| US4681511A (en) * | 1985-09-30 | 1987-07-21 | The Boeing Company | Low vibration helicopter rotor |
| CN1350621A (en) * | 1999-05-26 | 2002-05-22 | 达尼埃尔·德雷克 | Internal combustion engine comprising means for reducing acyclisms for operation at low engine speeds |
| CN102588504A (en) * | 2012-02-02 | 2012-07-18 | 哈尔滨飞机工业集团有限责任公司 | Power vibration absorber for helicopter |
| CN103842686A (en) * | 2011-09-19 | 2014-06-04 | 舍弗勒技术有限两合公司 | Centrifugal force pendulum |
-
2015
- 2015-11-04 CN CN201510742653.1A patent/CN105270624A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4145936A (en) * | 1976-01-20 | 1979-03-27 | Westland Aircraft Limited | Vibration absorbers |
| US4681511A (en) * | 1985-09-30 | 1987-07-21 | The Boeing Company | Low vibration helicopter rotor |
| CN1350621A (en) * | 1999-05-26 | 2002-05-22 | 达尼埃尔·德雷克 | Internal combustion engine comprising means for reducing acyclisms for operation at low engine speeds |
| CN103842686A (en) * | 2011-09-19 | 2014-06-04 | 舍弗勒技术有限两合公司 | Centrifugal force pendulum |
| CN102588504A (en) * | 2012-02-02 | 2012-07-18 | 哈尔滨飞机工业集团有限责任公司 | Power vibration absorber for helicopter |
Non-Patent Citations (1)
| Title |
|---|
| 张呈林等: "《直升机部件设计》", 31 July 1986 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108698708A (en) * | 2017-08-31 | 2018-10-23 | 深圳市大疆灵眸科技有限公司 | Vibration absorber and clouds terrace system |
| WO2019041232A1 (en) * | 2017-08-31 | 2019-03-07 | 深圳市大疆灵眸科技有限公司 | Vibration reduction device and cradle head system |
| CN108698708B (en) * | 2017-08-31 | 2021-12-31 | 深圳市大疆灵眸科技有限公司 | Vibration damper and holder system |
| CN114112268A (en) * | 2021-11-23 | 2022-03-01 | 中国直升机设计研究所 | Vibration damping verification device and vibration damping verification method for double-line pendulum vibration absorber |
| CN114112268B (en) * | 2021-11-23 | 2023-04-28 | 中国直升机设计研究所 | Vibration damping verification device and vibration damping verification method for double-line pendulum vibration absorber |
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