CN115479758A - Centrifugal load test device and test method thereof - Google Patents
Centrifugal load test device and test method thereof Download PDFInfo
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- CN115479758A CN115479758A CN202110661879.4A CN202110661879A CN115479758A CN 115479758 A CN115479758 A CN 115479758A CN 202110661879 A CN202110661879 A CN 202110661879A CN 115479758 A CN115479758 A CN 115479758A
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- 230000002787 reinforcement Effects 0.000 claims abstract description 90
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 25
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- 238000009434 installation Methods 0.000 abstract description 3
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
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- B64F5/60—Testing or inspecting aircraft components or systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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Abstract
The invention provides a centrifugal load test device and a test method thereof.A blade reinforcement is detachably connected to a hub; the transfer shaft is a stepped shaft, and the paddle reinforcement and the transfer shaft share a central axis; the bow clamp is fixed on the frame and sleeved on the second shaft; the adjusting gaskets are sleeved on the transfer shaft, and the number and the thickness of the adjusting gaskets are determined according to the length of the paddle reinforcing member and the centrifugal load loading position so as to adjust the distance between the transfer shaft and the paddle reinforcing member; the centrifugal load applying devices are two and are connected to the two symmetrical ends of the bow-shaped clamp in a one-to-one correspondence mode, so that the centrifugal load is transmitted to the propeller hub through the transfer shaft and the propeller blade reinforcing members in sequence, and a centrifugal load test is completed. The invention provides a centrifugal load test device and a test method thereof, only blade reinforcements are needed for the loading positions of different centrifugal loads and the lengths of the blade reinforcements with different lengths, the cost is lower, the installation and the operation are convenient, and the test is accurate.
Description
Technical Field
The invention relates to the technical field of propeller hub test devices, in particular to a centrifugal load test device and a test method thereof.
Background
The hub is an important moving part in the working process of the propeller and bears most of centrifugal load generated by the rotation of the propeller, so that the strength performance of the hub needs to be verified through tests.
At screw propeller hub fatigue test, static test, stress strain distribution test in-process, the centrifugal load of propeller hub is applyed by hydraulic cylinder to the centrifugal load loading position and the paddle reinforcement length of different experiments all are different, but at present all need process one set of test device to the centrifugal load loading position of different experiments and different paddle reinforcement length, with the centrifugal load loading position that matches and the paddle reinforcement length that matches that correspond, lead to the cost great, and the installation is inconvenient.
Therefore, how to provide a centrifugal load testing device and a testing method thereof which are convenient to install and low in cost is an urgent problem to be solved by those skilled in the art.
Disclosure of Invention
In view of this, the present invention provides a centrifugal load testing apparatus and a testing method thereof, for the loading positions of different centrifugal loads and the lengths of the blade reinforcements with different lengths, only the blade reinforcements are needed, so that the present invention has the advantages of low cost, convenient installation and operation, and the applied centrifugal load can be transmitted to the hub along the axis of the hub, so as to ensure the accuracy of the centrifugal load testing of the hub of the present invention.
In order to achieve the purpose, the invention adopts the following technical scheme:
a centrifugal load testing apparatus comprising:
the blade reinforcing member is detachably connected to the propeller hub;
the transfer shaft is a stepped shaft and comprises a first shaft and a second shaft with the outer diameter smaller than that of the first shaft, one end of the first shaft is hinged with the paddle reinforcement, the other end of the first shaft is integrally connected with the second shaft, a shaft shoulder is formed at the joint of the first shaft and the second shaft, and the paddle reinforcement, the first shaft and the second shaft share the same central axis;
the bow-shaped clamp is fixed on the rack and sleeved on the second shaft, two ends of the bow-shaped clamp are symmetrically positioned at two sides of the axis of the second shaft, and meanwhile, one end of the second shaft, which is far away from the first shaft, is detachably connected with a limit nut;
the adjusting shim is sleeved on the second shaft, the number and the thickness of the adjusting shim are determined according to the length of the blade reinforcing piece and the centrifugal load loading position, so that the distance between the first shaft and the blade reinforcing piece is adjusted, and meanwhile, the adjusting shim and the bow-shaped clamp are abutted between the shaft shoulder and the limiting nut;
the two centrifugal load applying devices are connected to two ends of the arched clamp in a one-to-one correspondence mode, are symmetrically located on two sides of the axis of the second shaft, and apply the same centrifugal load.
Preferably, one end of the first shaft is rotatably connected with the paddle reinforcement through a pin shaft.
Preferably, the first shaft and the paddle reinforcing member are provided with through holes at positions corresponding to the pin shafts, the pin shafts are inserted into the two through holes, the head ends of the pin shafts are provided with limiting caps, the side walls of the pin shafts close to the tail ends of the pin shafts are provided with positioning grooves along the circumferential direction, and spring clamps are clamped in the positioning grooves.
Preferably, the arcuate clamp is provided with a sleeve hole along the axis direction of the second shaft, the inner wall of the sleeve hole is provided with a first key slot, the second shaft is provided with a plurality of second key slots along the axis of the second shaft, the second key slots are distributed along the axis of the second shaft, and the second shaft can reciprocate along the axis of the second shaft in the sleeve hole, so that one of the second key slots corresponds to the first key slot, and meanwhile, the second key slots corresponding to each other are connected with the first key slot through keys.
Preferably, the centrifugal load applying device includes:
the inner ring of the ball bearing is fixed at the end part of the bow-shaped clamp through a pin;
the steel wire rope is sleeved and fixed on the outer ring of the ball bearing;
the piston rod of the hydraulic cylinder is respectively fixed at two ends of the steel wire rope, and a centrifugal load applied by the hydraulic cylinder is transmitted to the propeller hub through the steel wire rope, the ball bearing, the bow clamp, the second shaft, the first shaft and the blade reinforcing member in sequence;
and the controller is electrically connected with the hydraulic cylinder.
Preferably, the two ball bearings at the two ends of the bow clamp are symmetrical, the steel wire ropes at the two ends of the bow clamp are symmetrical, and the hydraulic cylinders at the two ends of the bow clamp are symmetrical.
Preferably, the conditioner mat includes: the number and the thickness of the first adjusting shim and the second adjusting shim are determined according to the length of the blade reinforcing piece and the centrifugal load loading position, the first adjusting shim is abutted between the shaft shoulder and the arched clamp, and the second adjusting shim is abutted between the arched clamp and the limiting nut.
A test method of a centrifugal load test device comprises the following steps:
s1: fixing the bow clamp to keep the bow clamp still;
s2: according to the diameter size of a hub, the length of a blade and the centrifugal load loading position, fixing a blade reinforcing member on the hub, and fixing the hub on a base;
s3: a first shaft of a transfer shaft is rotatably connected with the paddle reinforcement through a pin shaft, a second shaft of the transfer shaft is sleeved with a first adjusting gasket, the number and the thickness of the first adjusting gasket are determined according to the length of the paddle reinforcement and the centrifugal load loading position, and the first adjusting gasket is arranged close to a shaft shoulder of the transfer shaft;
s4: the second shaft penetrates through a sleeve hole of the arched clamp, one second key groove on the second shaft corresponds to the first key groove on the inner wall of the sleeve hole, the second key groove and the first key groove which correspond to each other are connected through keys, second adjusting gaskets are sleeved on the second shaft, and the number and the thickness of the second adjusting gaskets are determined according to the length of the paddle reinforcing piece and the centrifugal load loading position;
s5: screwing a limiting nut on one end of the second shaft, which is far away from the first shaft, and enabling the limiting nut to abut against the second adjusting gasket, the arched clamp, the first adjusting gasket and the shaft shoulder in sequence, and enabling the blade reinforcing piece, the first shaft and the second shaft to be coaxial;
s6: and the controller controls the centrifugal load applying devices at two symmetrical ends of the bow-shaped clamp to apply centrifugal loads to the bow-shaped clamp at the same time, and the centrifugal loads applied by the two centrifugal load applying devices are the same, so that the centrifugal loads are transmitted to the propeller hub through the second shaft, the first shaft and the blade reinforcing member in sequence, and then a centrifugal load test can be completed.
Preferably, the centrifugal load applying device includes:
the inner ring of the ball bearing is fixed at the end part of the bow-shaped clamp through a pin;
the steel wire rope is fixed on the outer ring of the ball bearing;
the piston rod of the hydraulic cylinder is fixed with the steel wire rope, and a centrifugal load applied by the hydraulic cylinder is transmitted to the propeller hub through the steel wire rope, the ball bearing, the bow clamp, the second shaft, the first shaft and the blade reinforcement in sequence;
the controller is electrically connected with the hydraulic cylinder;
and the two ball bearings at the two ends of the bow-shaped clamp are symmetrical, the steel wire ropes at the two ends of the bow-shaped clamp are symmetrical, and the hydraulic cylinders at the two ends of the bow-shaped clamp are symmetrical.
Through the technical scheme, compared with the prior art, the centrifugal load test device disclosed by the invention can realize the following technical effects:
(1) After the bow clamp 3 is fixed, the blade reinforcement 1 is fixed on the propeller hub, and the propeller hub is fixed on the base, the number and the thickness of the first adjusting gasket 51 and the second adjusting gasket 52 are adjusted according to the length of the blade reinforcement 1 and the centrifugal load loading position, so that the distance between the transfer shaft 2 and the bow clamp 3 is adjusted, and meanwhile, the centrifugal load applying device 6 does not need to be disassembled or replaced, the operation is simple, and the cost is low;
(2) The first shaft 21 of the transfer shaft 2 is detachably connected with the paddle reinforcement 1, and only the corresponding paddle reinforcement 1 needs to be replaced according to the paddle reinforcement 2 with different lengths and the centrifugal load loading position, so that the cost is low, and the assembly and disassembly are convenient;
(3) The first shaft 21 and the paddle reinforcing member 1 are connected through the pin shaft 7, so that the assembly and disassembly are convenient, and the coaxiality of the paddle reinforcing member 1 and the adapting shaft 2 can be conveniently adjusted;
(4) The blade reinforcement 1, the first shaft 21 and the second shaft 22 of the present invention are concentric with a central axis, and the two centrifugal load applying devices 6 are symmetrical and apply the same centrifugal load, so the centrifugal load applied by the present invention can be transmitted to the hub along the axis of the hub, so that the accuracy of the centrifugal load test of the present invention on the hub can be ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a sectional view of a second shaft partially cut away from a centrifugal load testing apparatus of the present invention;
FIG. 2 is a cross-sectional view, partially in cross-section, of a centrifugal load testing apparatus of the present invention with respect to a first shaft and blade reinforcement;
FIG. 3 is a side view of the transfer shaft of the present invention;
FIG. 4 is a cross-sectional view taken at B-B of FIG. 3;
fig. 5 is a top view of a clamp bow according to the present invention.
Wherein, 1 a blade reinforcement; 2-a transfer shaft; 21-a first axis; 22-a second axis; 20-shaft shoulder; 3-a bow clamp; 4-a limit nut; 5-adjusting the gasket; 6-centrifugal load applying means; 7-a pin shaft; 71-a limit cap; 72-spring clip; 61-ball bearings; 60-pins; 62-a steel wire rope; 63-hydraulic cylinder; 51-a first conditioning shim; 52-a second conditioning shim; 30-trepanning; 301-a first keyway; 220-second keyway.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a centrifugal load test device, which comprises:
the paddle reinforcement 1 is detachably connected to the hub;
the transfer shaft 2 is a stepped shaft and comprises a first shaft 21 and a second shaft 22 with the outer diameter smaller than that of the first shaft 21, one end of the first shaft 21 is hinged with the paddle reinforcement 1, the other end of the first shaft 21 is integrally connected with the second shaft 22, a shaft shoulder 20 is formed at the joint of the first shaft 21 and the second shaft 22, and the paddle reinforcement 1, the first shaft 21 and the second shaft 22 share the same central axis;
the bow-shaped clamp 3 is fixed on the rack and sleeved on the second shaft 22, two ends of the bow-shaped clamp 3 are symmetrically positioned at two sides of the axis of the second shaft 22, and meanwhile, one end of the second shaft 22, which is far away from the first shaft 21, is detachably connected with a limit nut 4;
the adjusting gaskets 5 are sleeved on the second shaft 22, the number and the thickness of the adjusting gaskets 5 are determined according to the length of the blade reinforcement 1 and the centrifugal load loading position, so that the distance between the first shaft 21 and the blade reinforcement 1 is adjusted, and meanwhile, the adjusting gaskets 5 and the bow-shaped clamp 3 abut against the space between the shaft shoulder 20 and the limiting nut 4;
the centrifugal load applying devices 6 are two in number, the two centrifugal load applying devices 6 are connected to two ends of the bow-shaped clamp 3 in a one-to-one correspondence mode, the two centrifugal load applying devices 6 are symmetrically located on two sides of the axis of the second shaft 22, and meanwhile the two centrifugal load applying devices 6 apply the same centrifugal load.
The first shaft 21 of the transfer shaft 2 is detachably connected with the blade reinforcement 1, so that only the corresponding blade reinforcement 1 needs to be replaced, namely only the blade reinforcement 1 needs to be disassembled again, the cost of the centrifugal load testing device is low, the centrifugal load testing device is convenient to install, when the centrifugal load testing device is used for testing the blade reinforcement 2 and the centrifugal load loading position with different lengths, after a new hub and the new blade reinforcement 1 are fixed, the centrifugal load applying device 6 does not need to be disassembled again, only after the limiting nut 4 is disassembled, the transfer shaft 2 is disassembled from the arched clamp 3, the number and the thickness of the adjusting gaskets 5 installed on the transfer shaft 2 are adjusted, so that the distance between the first shaft 21 and the blade reinforcement 1 can be adjusted, finally, the transfer shaft 2 is re-installed on the arched clamp 3, the limiting nut 4 is installed on the second shaft 22 of the transfer shaft 2, the operation of the centrifugal load testing device is convenient, the blade reinforcement 1, the first shaft 21 and the second shaft 22 share the central axis, and the two centrifugal load applying devices 6 are symmetrical, and the centrifugal load can be applied to the centrifugal hub symmetrically, so that the centrifugal load can be accurately transferred to the centrifugal hub.
In order to further optimize the solution described above, one end of the first shaft 21 is connected in rotation with the blade reinforcement 1 by means of a pin 7.
By adopting the technical scheme, the invention has the beneficial effects that: the blade reinforcement 1 of being convenient for is dismantled from adjusting the spiale 2 to blade reinforcement 2 and the centrifugal load loading position of different length, the blade reinforcement 1 that will match with the propeller hub length that will be tested is installed again on the spiale 2, is convenient for adjust the axiality of blade reinforcement 1 and spiale 2 simultaneously, consequently can reduce experimental error.
In order to further optimize the technical scheme, through holes are formed in the positions, corresponding to the pin shaft 7, of the first shaft 21 and the paddle reinforcing member 1, the pin shaft 7 is inserted into the two through holes, a limiting cap 71 is arranged at the head end of the pin shaft 7, a positioning groove is formed in the side wall, close to the tail end of the pin shaft 7, of the pin shaft 7 along the circumferential direction, and a spring clamp 72 is clamped in the positioning groove.
By adopting the technical scheme, the invention has the beneficial effects that: the limiting cap 71 and the spring clip 72 can prevent the pin shaft 7 from moving out of the corresponding through holes on the first shaft 21 and the blade reinforcement 1, and the operation is convenient and the cost is low.
In order to further optimize the technical scheme, the arcuate clamp 3 is provided with a sleeve hole 30 along the axis direction of the second shaft 22, the inner wall of the sleeve hole 30 is provided with a first key groove 301, the second shaft 22 is provided with a plurality of second key grooves 220 along the axis thereof, the plurality of second key grooves 220 are distributed along the axis of the second shaft 22, and the second shaft 22 can reciprocate along the axis of the second shaft 22 in the sleeve hole 30, so that one of the second key grooves 220 corresponds to the first key groove 301, and meanwhile, the corresponding second key grooves 220 are in key connection with the first key grooves 301.
By adopting the technical scheme, the invention has the beneficial effects that: the second shaft 22 is reciprocally movable in the sleeve hole 30 along the axis of the second shaft 22, so that the present invention facilitates adjustment of the distance between the first shaft 21 and the blade reinforcement 1 in accordance with the length of the blade reinforcement 1 and the centrifugal load loading position, and also prevents the clip 3 from rotating circumferentially on the second shaft 22 by positioning the clip 3 circumferentially by means of the key after the position is adjusted.
In order to further optimize the solution of the above technique, the centrifugal load applying device 6 comprises:
a ball bearing 61, the inner ring of the ball bearing 61 is fixed on the end of the bow-shaped clamp 3 through a pin 60;
the steel wire rope 62 is sleeved and fixed on the outer ring of the ball bearing 61;
the centrifugal load applied by the hydraulic cylinder 63 is transmitted to the hub through the steel wire rope 62, the ball bearing 61, the bow clamp 3, the second shaft 22, the first shaft 21 and the blade reinforcement 1 in sequence;
and the controller is electrically connected with the hydraulic cylinder 63.
By adopting the technical scheme, the invention has the beneficial effects that: the steel wire ropes 62 are respectively connected with the piston rods of the hydraulic cylinders 63 and the ball bearings 61, and the ball bearings 61 are fixed at the end parts of the bow clamps 3 through the pins 60, so that stress balance of the two steel wire ropes 62 sleeved on the outer rings of the ball bearings 61 can be guaranteed, centrifugal loads are guaranteed to act on the hubs along the axial lines of the hubs, and accuracy of the experiment of the invention is guaranteed.
In order to further optimize the solution of the above technology, the two ball bearings 61 at the two ends of the bow 3 are symmetrical, and the wire ropes 62 at the two ends of the bow 3 are symmetrical, while the hydraulic cylinders 63 at the two ends of the bow 3 are symmetrical.
By adopting the technical scheme, the invention has the beneficial effects that: further ensuring that centrifugal loads act on the hub along the axis of the hub to ensure the accuracy of the inventive experiment.
In order to further optimize the solution of the above technique, the conditioner mat comprises: the number and the thickness of the first adjusting shim 51 and the second adjusting shim 52 are determined according to the length of the blade reinforcement 1 and the centrifugal load loading position, the first adjusting shim 51 abuts between the shaft shoulder 20 and the bow-shaped clamp 3, and the second adjusting shim 52 abuts between the bow-shaped clamp 3 and the limit nut 4.
By adopting the technical scheme, the invention has the beneficial effects that: so as to improve the flexibility and convenience of adjusting the distance between the adapter shaft 2 and the blade reinforcement 1.
In order to further optimize the technical scheme, the inner walls of the central holes of the first adjusting gasket 51 and the second adjusting gasket 52 are provided with clamping grooves clamped with the keys.
By adopting the technical scheme, the invention has the beneficial effects that: the key is prevented from influencing the normal assembly of the first adjusting shim 51 and the second adjusting shim 52, so that both the first adjusting shim 51 and the second adjusting shim 52 can be stably and fittingly arranged on the second shaft 22.
A test method of a centrifugal load test device comprises the following steps:
s1: fixing the bow 3, keeping the bow 3 stationary;
s2: according to the diameter size of the hub, the length of the blade and the centrifugal load loading position, the blade reinforcement 1 is fixed on the hub, and the hub is fixed on the base;
s3: the first shaft 21 of the transfer shaft 2 is rotatably connected with the paddle reinforcement 1 through a pin shaft 7, meanwhile, a first adjusting gasket 51 is sleeved on the second shaft 22 of the transfer shaft 2, the number and the thickness of the first adjusting gasket 51 are determined according to the length of the paddle reinforcement 1 and the centrifugal load loading position, and at the moment, the first adjusting gasket 51 is arranged close to a shaft shoulder 20 of the transfer shaft 2;
s4: the second shaft 22 penetrates through the sleeve hole 30 of the arch clamp 3, one second key groove 220 on the second shaft 22 corresponds to the first key groove 301 on the inner wall of the sleeve hole 30, the corresponding second key groove 220 and the first key groove 301 are connected through key connection, the second adjusting shim 52 is sleeved on the second shaft 22, and the number and the thickness of the second adjusting shim 52 are determined according to the length of the blade reinforcement 1 and the centrifugal load loading position;
s5: screwing a limiting nut 4 on one end of the second shaft 22 far away from the first shaft 21, and enabling the limiting nut 4 to abut against the second adjusting shim 52, the bow clamp 3, the first adjusting shim 51 and the shaft shoulder 20 in sequence, and enabling the blade reinforcement 1, the first shaft 21 and the second shaft 22 to be coaxial;
s6: the controller controls the centrifugal load applying devices 6 at the two symmetrical ends of the bow-shaped clamp 3 to apply centrifugal loads to the bow-shaped clamp 3 at the same time, and the centrifugal loads applied by the two centrifugal load applying devices 6 are the same, so that the centrifugal loads are transmitted to the hub through the second shaft 22, the first shaft 21 and the blade reinforcing member 1 in sequence, and then the centrifugal load test can be completed.
The invention adopts the following method: (1) After the bow-shaped clamp 3 is fixed, the blade reinforcement 1 is fixed on the propeller hub, and the propeller hub is fixed on the base, the number and the thickness of the first adjusting gasket 51 and the second adjusting gasket 52 are adjusted according to the length of the blade reinforcement 1 and the centrifugal load loading position, so that the distance between the transfer shaft 2 and the bow-shaped clamp 3 is adjusted, and meanwhile, the centrifugal load applying device 6 does not need to be disassembled and replaced, so that the operation is simple and the cost is low;
(1) The first shaft 21 of the transfer shaft 2 is detachably connected with the paddle reinforcement 1, and only the corresponding paddle reinforcement 1 needs to be replaced according to the paddle reinforcement 2 with different lengths and the centrifugal load loading position, so that the cost is low, and the assembly and disassembly are convenient;
(3) The first shaft 21 and the paddle reinforcing member 1 are connected through the pin shaft 7, so that the assembly and disassembly are convenient, and the coaxiality of the paddle reinforcing member 1 and the adapting shaft 2 is convenient to adjust;
(4) The blade reinforcement 1, the first shaft 21 and the second shaft 22 of the present invention are concentric with a central axis, and the two centrifugal load applying devices 6 are symmetrical and apply the same centrifugal load, so the centrifugal load applied by the present invention can be transmitted to the hub along the axis of the hub, so that the accuracy of the centrifugal load test of the present invention on the hub can be ensured.
In order to further optimize the above solution, the centrifugal load applying means 6 comprises:
a ball bearing 61, the inner ring of the ball bearing 61 is fixed on the end part of the bow-shaped clamp 3 through a pin 60;
the steel wire rope 62 is fixed on the outer ring of the ball bearing 61;
the piston rod of the hydraulic cylinder 63 is fixed with the steel wire rope 62, and the centrifugal load applied by the hydraulic cylinder 63 is transmitted to the hub through the steel wire rope 62, the ball bearing 61, the bow clamp 3, the second shaft 22, the first shaft 21 and the blade reinforcement 1 in sequence;
the controller is electrically connected with the hydraulic cylinder 63;
the two ball bearings 61 at both ends of the clamp 3 are symmetrical, the wire ropes 62 at both ends of the clamp 3 are symmetrical, and the hydraulic cylinders 63 at both ends of the clamp 3 are symmetrical.
By adopting the technical scheme, the invention has the beneficial effects that: the steel wire ropes 62 are respectively connected with the piston rod of the hydraulic cylinder 63 and the ball bearing 61, and the ball bearing 61 is fixed at the end part of the bow-shaped clamp 3 through the pin 60, so that the two steel wire ropes 62 sleeved on the outer ring of the ball bearing 61 can be ensured to be stressed in balance, the centrifugal load is ensured to act on the hub along the axis of the hub, and the accuracy of the experiment of the invention is ensured.
Example 1: the embodiment of the invention discloses a centrifugal load test device, and a test method thereof comprises the following steps:
s1: fixing the clamp 3 to keep the clamp 3;
s2: according to the difference of the diameter size of the hub, the length of the blade and the centrifugal load loading position, a blade reinforcement 1 (the diameter size of the blade reinforcement 1 and the diameter size of the hub are the same as the length of the blade) is adopted, and the blade reinforcement 1 is fixed on the hub, and the hub is fixed on a base;
s3: the first shaft 21 of the transfer shaft 2 is rotatably connected with the paddle reinforcement 1 through a pin shaft 7, meanwhile, a first adjusting gasket 51 is sleeved on the second shaft 22 of the transfer shaft 2, the number and the thickness of the first adjusting gasket 51 are determined according to the length of the paddle reinforcement 1 and the centrifugal load loading position, and at the moment, the first adjusting gasket 51 is arranged close to a shaft shoulder 20 of the transfer shaft 2;
s4: the second shaft 22 penetrates through the sleeve hole 30 of the arch clamp 3, one of the second keyways 220 on the second shaft 22 corresponds to the first keyway 301 on the inner wall of the sleeve hole 30, the corresponding second keyways 220 and the first keyway 301 are connected through key connection, the second adjusting shims 52 are sleeved on the second shaft 22, and the number and the thickness of the second adjusting shims 52 are determined according to the length of the blade reinforcement 1 and the centrifugal load loading position;
s5: screwing a limiting nut 4 on one end of the second shaft 22 far away from the first shaft 21, and enabling the limiting nut 4 to abut against the second adjusting shim 52, the bow clamp 3, the first adjusting shim 51 and the shaft shoulder 20 in sequence, and enabling the blade reinforcement 1, the first shaft 21 and the second shaft 22 to be coaxial;
s6: the controller controls the centrifugal load applying devices 6 at the two symmetrical ends of the bow-shaped clamp 3 to apply centrifugal loads to the bow-shaped clamp 3 at the same time, and the centrifugal loads applied by the two centrifugal load applying devices 6 are the same, so that the centrifugal loads are transmitted to the hub through the second shaft 22, the first shaft 21 and the blade reinforcing member 1 in sequence, and then the centrifugal load test can be completed.
Example 2: the length of the hub and the blade reinforcement 1 is longer than that of the hub and the blade reinforcement 1 in the embodiment 1, the load action positions are the same, and the experimental steps are as follows;
a1: the length of the hub in example 2 is longer than that of the hub in example 1, the length of the blade reinforcement 1 in example 2 is longer than that of the blade reinforcement 1 in example 1, and then the hub in example 1 is detached from the blade reinforcement 1 and the base in example 1, respectively, while pulling out the pin shaft 7, to detach the blade reinforcement 1 in example 1 from the first shaft 21;
a2: the blade reinforcement 1 in example 2 is fixed to the hub in example 2, while the hub in example 2 is fixed to a base (i.e., the base in example 1 is stationary);
a3: the stop nut 4 and the second adjusting washer 52 are removed and the key is removed, withdrawing the second shaft 22 from the bow 3:
a4: moving the adapter shaft 2 in a direction away from the base, inserting the pin shaft 7 into the through holes after the through hole for assembling the pin shaft 7 on the first shaft 21 of the adapter shaft 2 corresponds to the through hole for assembling the pin shaft 7 on the paddle reinforcement 1 in the embodiment 2, and clamping the spring clamp 72 on the pin shaft 7;
a5: the number and thickness of the first adjusting shims 51 were reduced on the second shaft 22 in accordance with the length and centrifugal load loading position of the blade reinforcement 1 in embodiment 2;
a6: the second shaft 22 is arranged in the sleeve hole 30 of the arch-shaped clamp 3 again in a penetrating mode, the first key groove 301 in the inner wall of the sleeve hole 30 corresponds to the second key groove 220 adaptive to the position of the second shaft 22, the first key groove 301 and the newly corresponding second key groove 220 are connected through keys, the number and the thickness of the second adjusting shims 52 sleeved on the second shaft 22 are increased, and the number and the thickness of the second adjusting shims 52 are determined according to the length of the blade reinforcement 1 and the centrifugal load loading position in the embodiment 2;
a7: the limit nut 4 is screwed again at one end of the second shaft 22 far away from the first shaft 21, and the limit nut 4 abuts against the second adjusting shim 52, the bow-shaped clamp 3, the first adjusting shim 51 and the shaft shoulder 20 in sequence, and meanwhile, the blade reinforcement 1, the first shaft 21 and the second shaft 22 in the embodiment 2 are made to be coaxial;
then, step S6 in the embodiment is repeated.
Example 3: the length of the hub and the blade reinforcement 1 is equal to the length of the hub and the blade reinforcement 1 in the embodiment 1, the load acting position is farther away from the blade reinforcement 1 than the embodiment 1, the limit nut 4 and the second adjusting shim 52 are removed according to the method in the embodiment 2, the second shaft 22 is drawn out from the arched clamp 3, then the number and the thickness of the first adjusting shim 51 and the second adjusting shim 52 are adjusted, the number and the thickness of the first adjusting shim 51 are increased, the number and the thickness of the second adjusting shim 52 are reduced, and finally the centrifugal load testing device is assembled according to the mode of the embodiment 2.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A centrifugal load test apparatus, comprising:
the blade reinforcement (1) is detachably connected to the hub;
the transfer shaft (2) is a stepped shaft and comprises a first shaft (21) and a second shaft (22) with the outer diameter smaller than that of the first shaft (21), one end of the first shaft (21) is hinged with the blade reinforcement (1), the other end of the first shaft is integrally connected with the second shaft (22), a shaft shoulder (20) is formed at the joint of the first shaft (21) and the second shaft (22), and meanwhile the blade reinforcement (1), the first shaft (21) and the second shaft (22) share the same central axis;
the bow-shaped clamp (3) is fixed on the rack and sleeved on the second shaft (22), two ends of the bow-shaped clamp (3) are symmetrically positioned on two sides of the axis of the second shaft (22), and meanwhile, one end, far away from the first shaft (21), of the second shaft (22) is detachably connected with a limiting nut (4);
the adjusting shims (5) are sleeved on the second shaft (22), the number and the thickness of the adjusting shims (5) are determined according to the length of the blade reinforcing member (1) and the centrifugal load loading position, so that the distance between the first shaft (21) and the blade reinforcing member (1) is adjusted, and meanwhile the adjusting shims (5) and the bow-shaped clamp (3) abut between the shaft shoulder (20) and the limiting nut (4);
the two centrifugal load applying devices (6) are connected to two ends of the arched clamp (3) in a one-to-one correspondence mode, the two centrifugal load applying devices (6) are symmetrically located on two sides of the axis of the second shaft (22), and the two centrifugal load applying devices (6) apply the same centrifugal load.
2. A centrifugal load testing device according to claim 1, characterized in that one end of the first shaft (21) is rotatably connected to the blade reinforcement (1) by means of a pin (7).
3. The centrifugal load test device according to claim 2, wherein through holes are formed in positions of the first shaft (21) and the paddle reinforcement (1) corresponding to the pin shafts (7), the pin shafts (7) are inserted into the two through holes, the head ends of the pin shafts (7) are provided with limit caps (71), positioning grooves are formed in the side walls, close to the tail ends of the pin shafts (7), of the pin shafts along the circumferential direction, and spring clips (72) are clamped in the positioning grooves.
4. The centrifugal load test device according to claim 1, wherein a sleeve hole (30) is formed in the arch clamp (3) along the axis direction of the second shaft (22), a first key groove (301) is formed in the inner wall of the sleeve hole (30), a plurality of second key grooves (220) are formed in the second shaft (22) along the axis of the second shaft (22), the second shaft (22) is distributed along the axis of the second shaft (22), and the second shaft (22) can reciprocate in the sleeve hole (30) along the axis of the second shaft (22) so that one of the second key grooves (220) corresponds to the first key groove (301), and the corresponding second key groove (220) and the first key groove (301) are connected through a key.
5. A centrifugal load testing apparatus according to claim 1, wherein said centrifugal load applying means (6) comprises:
a ball bearing (61), the inner ring of the ball bearing (61) being fixed to the end of the bow clamp (3) by a pin (60);
the steel wire rope (62) is sleeved and fixed on the outer ring of the ball bearing (61);
the piston rod of the hydraulic cylinder (63) is respectively fixed at two ends of the steel wire rope (62), and the centrifugal load applied by the hydraulic cylinder (63) is transmitted to the propeller hub through the steel wire rope (62), the ball bearing (61), the bow clamp (3), the second shaft (22), the first shaft (21) and the blade reinforcement (1) in sequence;
the controller is electrically connected with the hydraulic cylinder (63).
6. A centrifugal load test device according to claim 5, characterized in that the two ball bearings (61) at both ends of the bow (3) are symmetrical, and the wire ropes (62) at both ends of the bow (3) are symmetrical, while the hydraulic cylinders (63) at both ends of the bow (3) are symmetrical.
7. A centrifugal load testing device according to claim 1, wherein said conditioner mat comprises: the number and the thickness of the first adjusting shim (51) and the second adjusting shim (52) are determined according to the length of the blade reinforcing member (1) and the centrifugal load loading position, the first adjusting shim (51) abuts between the shaft shoulder (20) and the arched clamp (3), and the second adjusting shim (52) abuts between the arched clamp (3) and the limiting nut (4).
8. A test method of a centrifugal load test device is characterized by comprising the following steps:
s1: a fixed bow (3) which holds the bow (3) in place;
s2: according to the diameter size of a hub, the length of a blade and the centrifugal load loading position, fixing a blade reinforcing member (1) on the hub, and fixing the hub on a base;
s3: rotationally connecting a first shaft (21) of a transfer shaft (2) with the paddle reinforcement (1) through a pin shaft (7), sleeving a first adjusting gasket (51) on a second shaft (22) of the transfer shaft (2), wherein the number and the thickness of the first adjusting gaskets (51) are determined according to the length of the paddle reinforcement (1) and a centrifugal load loading position, and the first adjusting gaskets (51) are arranged close to a shaft shoulder (20) of the transfer shaft (2);
s4: the second shaft (22) penetrates through a sleeve hole (30) of the arch-shaped clamp (3), one second key groove (220) on the second shaft (22) corresponds to a first key groove (301) on the inner wall of the sleeve hole (30), the second key groove (220) and the first key groove (301) which correspond to each other are connected through a key, a second adjusting gasket (52) is sleeved on the second shaft (22), and the number and the thickness of the second adjusting gaskets (52) are determined according to the length of the blade reinforcement (1) and the centrifugal load loading position;
s5: screwing a limiting nut (4) on one end of the second shaft (22) far away from the first shaft (21), and enabling the limiting nut (4) to abut against the second adjusting shim (52), the bow clamp (3), the first adjusting shim (51) and the shaft shoulder (20) in sequence, and enabling the blade reinforcement (1), the first shaft (21) and the second shaft (22) to be coaxial;
s6: and the controller controls the centrifugal load applying devices (6) at two symmetrical ends of the bow-shaped clamp (3) to apply centrifugal loads to the bow-shaped clamp (3) at the same time, and the centrifugal loads applied by the two centrifugal load applying devices (6) are the same, so that the centrifugal loads are transmitted to the hub through the second shaft (22), the first shaft (21) and the blade reinforcing member (1) in sequence, and then a centrifugal load test can be completed.
9. The testing method of a centrifugal load testing device according to claim 8, wherein said centrifugal load applying means (6) comprises:
a ball bearing (61), wherein the inner ring of the ball bearing (61) is fixed at the end part of the bow-shaped clamp (3) through a pin (60);
the steel wire rope (62) is fixed on the outer ring of the ball bearing (61);
a hydraulic cylinder (63), wherein a piston rod of the hydraulic cylinder (63) is fixed with the steel wire rope (62), and a centrifugal load applied by the hydraulic cylinder (63) is transmitted to the hub through the steel wire rope (62), the ball bearing (61), the bow clamp (3), the second shaft (22), the first shaft (21) and the blade reinforcement (1) in sequence;
the controller is electrically connected with the hydraulic cylinder (63);
the two ball bearings (61) at the two ends of the bow-shaped clamp (3) are symmetrical, the steel wire ropes (62) at the two ends of the bow-shaped clamp (3) are symmetrical, and the hydraulic cylinders (63) at the two ends of the bow-shaped clamp (3) are symmetrical.
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| CN202110661879.4A CN115479758A (en) | 2021-06-15 | 2021-06-15 | Centrifugal load test device and test method thereof |
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| CN202110661879.4A CN115479758A (en) | 2021-06-15 | 2021-06-15 | Centrifugal load test device and test method thereof |
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