CN115479758A - A kind of centrifugal load test device and test method thereof - Google Patents

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

A kind of centrifugal load test device and test method thereof

technical field

The invention relates to the technical field of a propeller hub test device, in particular to a centrifugal load test device and a test method thereof.

Background technique

The propeller hub is an important moving part in the working process of the propeller, which bears most of the centrifugal load generated by the propeller rotation, so the strength performance of the propeller hub needs to be verified by tests.

During the propeller hub fatigue test, static test, and stress-strain distribution test, the centrifugal load of the hub is applied by the hydraulic cylinder, and the loading position of the centrifugal load and the length of the blade reinforcement are different in different tests. The loading position of the centrifugal load and the length of different blade reinforcements in the test need to process a set of test devices to match the corresponding centrifugal load loading position and the length of the corresponding blade reinforcement, resulting in high cost and inconvenient installation.

Therefore, how to provide an easy-to-install and low-cost centrifugal load test device and its test method is an urgent problem to be solved by those skilled in the art.

Contents of the invention

In view of this, the present invention provides a centrifugal load test device and a test method thereof. For the loading positions of different centrifugal loads and the length of blade reinforcements of different lengths, only the blade reinforcement is required, so that the cost of the present invention is relatively low. And the installation and operation are convenient, 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 test of the hub in the present invention.

In order to achieve the above object, the present invention adopts the following technical solutions:

A centrifugal load test device, comprising:

a blade reinforcement, the blade reinforcement is detachably connected to the hub;

An adapter shaft, the adapter shaft is a stepped shaft, including a first shaft and a second shaft with a smaller outer diameter than the first shaft, one end of the first shaft is hinged to the blade reinforcement, and the other end is integrally connected the second shaft, and the joint with the second shaft forms a shoulder, while the blade stiffener, the first shaft and the second shaft have a common central axis;

A bow clip, the bow clip is fixed on the frame and sleeved on the second shaft, the two ends of the bow clip are symmetrically located on both sides of the axis of the second shaft, and the second shaft A stop nut is detachably connected to one end away from the first shaft;

Adjusting shims, the adjusting shims are sleeved on the second shaft, and the number and thickness of the adjusting shims are determined according to the length of the blade reinforcement and the centrifugal load loading position, so as to adjust the the distance between the first shaft and the blade reinforcement, and at the same time, the adjusting washer and the bow clip abut between the shaft shoulder and the limit nut;

There are two centrifugal load applying devices, which are connected to the two ends of the bow clip one by one, and the two centrifugal load applying devices are symmetrically located on both sides of the axis of the second shaft, and at the same time The two centrifugal load applying devices apply the same centrifugal load.

Preferably, one end of the first shaft is rotatably connected to the blade reinforcement through a pin.

Preferably, the position of the first shaft and the blade reinforcing member corresponding to the pin shaft is provided with a through hole, the pin shaft is inserted in the two through holes, and the head of the pin shaft The end has a limit cap, and the side wall near the tail end of the pin shaft is provided with a positioning groove along the circumference, and a spring clip is clamped in the positioning groove.

Preferably, the bow clip is provided with a sleeve hole along the axis of the second shaft, and the inner wall of the sleeve hole is provided with a first keyway, and the second shaft is provided with a plurality of second keys along its axis. key slots, and a plurality of the second key slots are distributed along the axis of the second shaft, and the second shaft can move back and forth along the axis of the second shaft in the sleeve hole, so that one of the The second key grooves correspond to the first key grooves, and the corresponding second key grooves are connected to the first key grooves through keys.

Preferably, the centrifugal load applying device includes:

a ball bearing, the inner ring of which is pinned to the end of the bow clip;

a steel wire rope, the steel wire rope is sheathed and fixed on the outer ring of the ball bearing;

The hydraulic cylinder, the piston rod of the hydraulic cylinder respectively fixes the two ends of the steel wire rope, and the centrifugal load applied by the hydraulic cylinder passes through the steel wire rope, the ball bearing, the bow clamp, the second shaft, the The first shaft and the blade reinforcement are transmitted to the hub;

A controller, the controller is electrically connected with the hydraulic cylinder.

Preferably, the two ball bearings at both ends of the bow clamp are symmetrical, the steel wire ropes at both ends of the bow clamp are symmetrical, and the hydraulic cylinders at both ends of the bow clamp are symmetrical.

Preferably, the adjusting pad includes: a first adjusting shim and a second adjusting shim, the number and thickness of the first adjusting shim and the second adjusting shim are based on the number and thickness of the blade reinforcement The length and the loading position of the centrifugal load are determined, and the first adjusting gasket abuts between the shaft shoulder and the bow clip, and the second adjusting gasket abuts between the bow clip and the stop between the nuts.

A test method for a centrifugal load test device, comprising the steps of:

S1: Fix the bow clip so that the bow clip stays still;

S2: According to the diameter of the hub, the length of the blade, and the location of the centrifugal load, the blade reinforcement is fixed on the hub, and the hub is fixed on the base seat;

S3: Rotately connect the first shaft of the adapter shaft to the blade reinforcement through a pin shaft, and at the same time set a first adjusting gasket on the second shaft of the adapter shaft, and the first adjusting gasket The number and thickness of the paddle are determined according to the length of the blade reinforcement and the centrifugal load loading position, and at this time, the first adjusting gasket is arranged close to the shoulder of the adapter shaft;

S4: Pass the second shaft through the sleeve hole of the bow clip, and make one of the second key grooves on the second shaft correspond to the first key groove on the inner wall of the sleeve hole, and at the same time correspond to each other The second keyway and the first keyway are connected by a key, and at the same time, a second adjusting shim is sheathed on the second shaft, and the number and thickness of the second adjusting shim are according to the Determined by the length of the blade reinforcement and the centrifugal load loading position;

S5: Screw the limit nut on the end of the second shaft away from the first shaft, and make the limit nut abut against the second adjusting washer, the bow clip, and the first adjusting washer in sequence blade and said shoulder while concentrically aligning said blade stiffener, said first shaft, and said second shaft;

S6: The controller controls the centrifugal load applying devices at both symmetrical ends of the bow clip to apply centrifugal loads to the bow clip at the same time, and the centrifugal loads applied by the two centrifugal load applying devices are the same, then the centrifugal load passes through the second The shaft, the first shaft and the blade stiffener are transferred to the hub to complete the centrifugal load test.

Preferably, the centrifugal load applying device includes:

a ball bearing, the inner ring of which is pinned to the end of the bow clip;

a steel wire rope, the steel wire rope is fixed on the outer ring of the ball bearing;

hydraulic cylinder, the piston rod of the hydraulic cylinder is fixed with the steel wire rope, and the centrifugal load applied by the hydraulic cylinder passes through the steel wire rope, the ball bearing, the bow clamp, the second shaft, the the first shaft, the blade stiffener is transferred to the hub;

a controller, the controller is electrically connected to the hydraulic cylinder;

In addition, the two ball bearings at both ends of the bow clamp are symmetrical, the steel wire ropes at both ends of the bow clamp are symmetrical, and the hydraulic cylinders at both ends of the bow clamp are symmetrical.

It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a centrifugal load test device, which can achieve the following technical effects:

(1) Fix the bow clip 3 and fix the blade stiffener 1 on the propeller hub. After the propeller hub is fixed on the base, adjust the first The number and thickness of the adjusting shims 51 and the second adjusting shims 52 can be adjusted to adjust the distance between the adapter shaft 2 and the bow clip 3 without disassembling and replacing the centrifugal load applying device 6, which is simple to operate and low in cost ;

(2) The first shaft 21 of the adapter shaft 2 is detachably connected to the blade reinforcement 1. For blade reinforcements 2 of different lengths and centrifugal load loading positions, only the corresponding blade reinforcement 1 needs to be replaced. Yes, low cost, and easy to disassemble;

(3) Connecting the first shaft 21 and the blade reinforcement 1 through the pin shaft 7 is not only convenient for disassembly and assembly, but also facilitates adjustment of the coaxiality between the blade reinforcement 1 and the adapter shaft 2;

(4) The blade stiffener 1 of the present invention, the first shaft 21 and the second shaft 22 have a common 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 along the blade The axis of the hub is transmitted to the propeller hub, so that the accuracy of the present invention for the centrifugal load test of the propeller hub can be guaranteed.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is a sectional view of a partial section of the second shaft of a centrifugal load test device of the present invention;

Fig. 2 is a partial cross-sectional view of a centrifugal load test device of the present invention on the first shaft and blade reinforcement;

Fig. 3 is a side view of the adapter shaft of the present invention;

Fig. 4 is the sectional view of B-B place in Fig. 3;

Fig. 5 is a top view of the bow clip of the present invention.

Among them, 1 blade reinforcement; 2-transfer shaft; 21-first shaft; 22-second shaft; 20-shaft shoulder; 3-bow clip; 4-limit nut; 5-adjusting gasket; 6- Centrifugal load application device; 7-pin shaft; 71-limit cap; 72-spring card; 61-ball bearing; 60-pin; 62-wire rope; 63-hydraulic cylinder; 51-first adjusting gasket; 52-the first Two adjustment gaskets; 30-set hole; 301-the first keyway; 220-the second keyway.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The embodiment of the present invention discloses a centrifugal load test device, comprising:

The blade reinforcement 1, the blade reinforcement 1 is detachably connected to the hub;

The adapter shaft 2, the adapter shaft 2 is a stepped shaft, including a first shaft 21 and a second shaft 22 with a smaller outer diameter than the first shaft 21, one end of the first shaft 21 is hinged to the blade reinforcement 1, and the other end is integrally connected to the second shaft Two shafts 22, and the connection with the second shaft 22 forms a shoulder 20, and the blade reinforcement 1, the first shaft 21 and the second shaft 22 have a common central axis;

The bow clip 3 is fixed on the frame and sleeved on the second shaft 22, and the two ends of the bow clip 3 are symmetrically located on both sides of the axis of the second shaft 22, while the second shaft 22 is far away from the first shaft One end of 21 is detachably connected to the stop nut 4;

The adjusting gasket 5 is sleeved on the second shaft 22, and the number and thickness of the adjusting gasket 5 are determined according to the length of the blade reinforcement 1 and the loading position of the centrifugal load, so as to adjust the first shaft 21 The distance from the blade reinforcement 1, while adjusting the spacer 5 and the bow clip 3 abutting between the shaft shoulder 20 and the limit nut 4;

Centrifugal load applying device 6, two centrifugal load applying devices 6 are connected to the two ends of the bow clip 3 one by one, and the two centrifugal load applying devices 6 are symmetrically located on both sides of the axis of the second shaft 22, while the two centrifugal load applying devices The load applying device 6 applies the same centrifugal load.

The first shaft 21 of the adapter shaft 2 of the present invention is detachably connected to the blade reinforcement 1, so that for blade reinforcements 2 of different lengths and centrifugal load loading positions, only the corresponding blade reinforcement 1 needs to be replaced. Yes, that is, it is only necessary to renew the blade reinforcement 1, so that the cost of the present invention is low, and the installation is convenient. At the same time, when the present invention tests blade reinforcements 2 of different lengths and centrifugal load loading positions, the new After the propeller hub and the new blade reinforcement 1 are fixed, it is not necessary to disassemble the centrifugal load applying device 6 again, only need to remove the limit nut 4, disassemble the adapter shaft 2 from the bow clamp 3, and adjust the installation Adjust the number and thickness of the spacers 5 on the adapter shaft 2, so that the distance between the first shaft 21 and the blade reinforcement 1 can be adjusted, and finally reinstall the adapter shaft 2 on the bow clamp 3, and the limit nut 4 Installed on the second shaft 22 of the adapter shaft 2, so that the operation of the present invention is convenient, and the blade reinforcement 1, the first shaft 21 and the second shaft 22 of the present invention have a common central axis, and two centrifugal load applying devices 6 is symmetrical and applies 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 guaranteed.

In order to further optimize the above technical solution, one end of the first shaft 21 is rotationally connected with the blade reinforcement 1 through the pin shaft 7 .

The present invention adopts the above-mentioned technical scheme, and the beneficial effect that can be realized is: it is convenient to disassemble the blade reinforcement 1 from the adjustment adapter shaft 2, so that the blade reinforcement 2 of different lengths and the centrifugal load loading position can be compared with the one to be tested. The blade stiffener 1 with matching length of the hub is reinstalled on the adapter shaft 2, and at the same time it is convenient to adjust the coaxiality of the blade stiffener 1 and the adapter shaft 2, so the test error can be reduced.

In order to further optimize the solution of the above technology, the first shaft 21 and the position of the blade reinforcement 1 corresponding to the pin shaft 7 are provided with through holes, the pin shaft 7 is inserted in the two through holes, and the head end of the pin shaft 7 has a The limit cap 71 and the side wall near the tail end of the pin shaft 7 are provided with a positioning groove along the circumference, and a spring clip 72 is clamped in the positioning groove.

The present invention adopts the above-mentioned technical solution, and the beneficial effects that can be achieved are: the limit cap 71 and the spring clip 72 can prevent the pin shaft 7 from moving out from the first shaft 21 and the corresponding through hole on the blade reinforcement 1, and the operation is convenient. The cost is lower.

In order to further optimize the above-mentioned technical solution, the bow clip 3 is provided with a sleeve hole 30 along the axis direction of the second shaft 22, and the inner wall of the sleeve hole 30 is provided with a first keyway 301, and the second shaft 22 is provided with multiple slots along its axis. A second key groove 220, and a plurality of second key grooves 220 are distributed along the axis of the second shaft 22, the second shaft 22 can move back and forth 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 keyway 301, and the second keyway 220 corresponding to each other is connected to the first keyway 301 by a key.

The present invention adopts the above-mentioned technical scheme, and the beneficial effects that can be realized are: the second shaft 22 can move back and forth along the axis of the second shaft 22 in the sleeve hole 30, so that the present invention can be conveniently adjusted according to the length and centrifugal force of the blade reinforcement 1. Load loading position, adjust the distance between the first shaft 21 and the blade reinforcement 1, and at the same time, after the position is adjusted, use the key to position the bow clip 3 in the circumferential direction to prevent the bow clip 3 from surrounding the second shaft 22 to turn.

In order to further optimize the above technical solution, the centrifugal load applying device 6 includes:

Ball bearing 61, the inner ring of ball bearing 61 is fixed on the end of bow clip 3 by pin 60;

The steel wire rope 62 is sleeved and fixed on the outer ring of the ball bearing 61;

Hydraulic cylinder 63, the piston rod of hydraulic cylinder 63 fixes the two ends of steel wire rope 62 respectively, the centrifugal load that hydraulic cylinder 63 exerts passes through steel wire rope 62, ball bearing 61, bow clip 3, second shaft 22, first shaft 21, blades The stiffener 1 is transferred to the hub;

A controller, the controller is electrically connected with the hydraulic cylinder 63 .

The present invention adopts the above-mentioned technical scheme, and the beneficial effects that can be realized are: the steel wire rope 62 is respectively connected to the piston rod of the hydraulic cylinder 63 and the ball bearing 61, and the ball bearing 61 is fixed on the end of the bow clip 3 through the pin 60, so that the sleeve can be guaranteed The two steel wire ropes 62 on the outer ring of the ball bearing 61 are balanced in force, thereby ensuring that the centrifugal load acts on the hub along the axis of the hub to ensure the accuracy of the experiment of the present invention.

In order to further optimize the above technical solution, the two ball bearings 61 at both ends of the bow clamp 3 are symmetrical, and the steel wire ropes 62 at both ends of the bow clamp 3 are symmetrical, and the hydraulic cylinders 63 at both ends of the bow clamp 3 are symmetrical.

The present invention adopts the above-mentioned technical solution, which can achieve the beneficial effects of: further ensuring that the centrifugal load acts on the propeller hub along the axis of the propeller hub, so as to ensure the accuracy of the experiment of the present invention.

In order to further optimize the solution of the above technology, the adjustment pad includes: a first adjustment pad 51 and a second adjustment pad 52, the number and thickness of the first adjustment pad 51 and the second adjustment pad 52 are all according to the blade reinforcement 1 and the centrifugal load loading position, and the first adjusting washer 51 abuts between the shoulder 20 and the bow clamp 3 , and the second adjusting washer 52 abuts between the bow clamp 3 and the limit nut 4 .

The present invention adopts the above-mentioned technical solution, which can achieve the beneficial effect of improving the flexibility and convenience of adjusting the distance between the adapter shaft 2 and the blade reinforcing member 1 .

In order to further optimize the above-mentioned technical solutions, the inner walls of the central holes of the first adjusting washer 51 and the second adjusting washer 52 are both provided with engaging slots for engaging with the keys.

The present invention adopts the above-mentioned technical scheme, and the beneficial effects that can be realized are: avoiding that the key will affect the normal assembly of the first adjusting gasket 51 and the second adjusting gasket 52, so that the first adjusting gasket 51 and the second adjusting gasket 52 are both The second shaft 22 can be stabilized and adapted.

A test method for a centrifugal load test device, comprising the steps of:

S1: fixing the bow clip 3 so that the bow clip 3 remains still;

S2: According to the diameter of the propeller hub, the length of the propeller, and the location of the centrifugal load, the propeller reinforcement 1 is fixed on the propeller hub, and the propeller hub is fixed on the base;

S3: Rotately connect the first shaft 21 of the adapter shaft 2 to the blade reinforcement 1 through the pin shaft 7, and at the same time set the first adjusting gasket 51 on the second shaft 22 of the adapter shaft 2, the first adjusting gasket The number and thickness of the pieces 51 are determined according to the length of the blade reinforcement 1 and the centrifugal load loading position, and at this time, the first adjusting gasket 51 is arranged close to the shoulder 20 of the adapter shaft 2;

S4: Pass the second shaft 22 through the sleeve hole 30 of the bow clip 3, and make one of the second key grooves 220 on the second shaft 22 correspond to the first key groove 301 on the inner wall of the sleeve hole 30, and the corresponding second keys The keyway 220 is connected to the first keyway 301 by a key, and at the same time, the second adjusting washer 52 is sheathed on the second shaft 22. The number and thickness of the second adjusting washer 52 are based on the length of the blade reinforcement 1 and the Determined by centrifugal load loading position;

S5: Screw the limit nut 4 on the end of the second shaft 22 away from the first shaft 21, and make the limit nut 4 abut against the second adjusting washer 52, the bow clip 3, the first adjusting washer 51 and the shaft shoulder 20 in sequence , and at the same time make the blade reinforcement 1, the first shaft 21 and the second shaft 22 share the central axis;

S6: The controller controls the centrifugal load applying devices 6 at both symmetrical ends of the bow clip 3 to apply centrifugal loads to the bow clip 3 at the same time, and the centrifugal loads applied by the two centrifugal load applying devices 6 are the same, then the centrifugal load passes through the second shaft 22 and the second shaft in turn. A shaft 21 and blade reinforcement 1 are transferred to the hub to complete the centrifugal load test.

The present invention uses the above method: (1) fix the bow clip 3, and fix the blade reinforcement 1 on the propeller hub, and after the propeller hub is fixed on the base, according to the length of the blade reinforcement 1 and the centrifugal The load loading position adjusts the number and thickness of the first adjusting shim 51 and the second adjusting shim 52, so as to adjust the distance between the adapter shaft 2 and the bow clamp 3 without disassembling and replacing the centrifugal load applying device 6, Simple operation and low cost;

(1) The first shaft 21 of the adapter shaft 2 is detachably connected to the blade reinforcement 1. For blade reinforcements 2 of different lengths and centrifugal load loading positions, only the corresponding blade reinforcement 1 needs to be replaced. Yes, low cost, and easy to disassemble;

(3) Connecting the first shaft 21 and the blade reinforcement 1 through the pin shaft 7 is not only convenient for disassembly and assembly, but also facilitates adjustment of the coaxiality between the blade reinforcement 1 and the adapter shaft 2;

(4) The blade stiffener 1 of the present invention, the first shaft 21 and the second shaft 22 have a common 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 along the blade The axis of the hub is transmitted to the propeller hub, so that the accuracy of the present invention for the centrifugal load test of the propeller hub can be guaranteed.

In order to further optimize the above-mentioned technical scheme, the centrifugal load applying device 6 includes:

Ball bearing 61, the inner ring of ball bearing 61 is fixed on the end of bow clip 3 by pin 60;

Steel wire rope 62, steel wire rope 62 is fixed on the outer ring of ball bearing 61;

Hydraulic cylinder 63, the piston rod of hydraulic cylinder 63 is fixed together with steel wire rope 62, and the centrifugal load applied by hydraulic cylinder 63 is reinforced by steel wire rope 62, ball bearing 61, bow clip 3, second shaft 22, first shaft 21, and paddle in turn Part 1 is transferred to the propeller hub;

a controller, the controller is electrically connected to the hydraulic cylinder 63;

Moreover, the two ball bearings 61 at both ends of the bow clamp 3 are symmetrical, the steel wire ropes 62 at both ends of the bow clamp 3 are symmetrical, and the hydraulic cylinders 63 at both ends of the bow clamp 3 are symmetrical.

The present invention adopts the above-mentioned technical scheme, and the beneficial effects that can be realized are: the steel wire rope 62 is respectively connected to the piston rod of the hydraulic cylinder 63 and the ball bearing 61, and the ball bearing 61 is fixed on the end of the bow clip 3 through the pin 60, so that the sleeve can be guaranteed The two steel wire ropes 62 on the outer ring of the ball bearing 61 are balanced in force, thereby ensuring that the centrifugal load acts on the hub along the axis of the hub to ensure the accuracy of the experiment of the present invention.

Embodiment 1: The embodiment of the present invention discloses a centrifugal load test device, and its test method comprises the following steps:

S1: fixing the bow clip 3 so that the bow clip 3 remains still;

S2: According to the diameter of the hub, the length of the blade, and the location of the centrifugal load, the blade reinforcement 1 (the diameter of the blade reinforcement 1 is the same as the diameter of the hub and the length of the blade), and the blade reinforcement Part 1 is fixed on the propeller hub, while the propeller hub is fixed on the base;

S3: Rotately connect the first shaft 21 of the adapter shaft 2 to the blade reinforcement 1 through the pin shaft 7, and at the same time set the first adjusting gasket 51 on the second shaft 22 of the adapter shaft 2, the first adjusting gasket The number and thickness of the pieces 51 are determined according to the length of the blade reinforcement 1 and the centrifugal load loading position, and at this time, the first adjusting gasket 51 is arranged close to the shoulder 20 of the adapter shaft 2;

S4: Pass the second shaft 22 through the sleeve hole 30 of the bow clip 3, and make one of the second key grooves 220 on the second shaft 22 correspond to the first key groove 301 on the inner wall of the sleeve hole 30, and the corresponding second keys The keyway 220 is connected to the first keyway 301 by a key, and at the same time, the second adjusting washer 52 is sheathed on the second shaft 22. The number and thickness of the second adjusting washer 52 are based on the length of the blade reinforcement 1 and the Determined by centrifugal load loading position;

S5: Screw the limit nut 4 on the end of the second shaft 22 away from the first shaft 21, and make the limit nut 4 abut against the second adjusting washer 52, the bow clip 3, the first adjusting washer 51 and the shaft shoulder 20 in sequence , and at the same time make the blade reinforcement 1, the first shaft 21 and the second shaft 22 share the central axis;

S6: The controller controls the centrifugal load applying devices 6 at both symmetrical ends of the bow clip 3 to apply centrifugal loads to the bow clip 3 at the same time, and the centrifugal loads applied by the two centrifugal load applying devices 6 are the same, then the centrifugal load passes through the second shaft 22 and the second shaft in turn. A shaft 21 and blade reinforcement 1 are transferred to the hub to complete the centrifugal load test.

Embodiment 2: The length of the hub and the blade reinforcement 1 is longer than that of the blade hub and the blade reinforcement 1 in Embodiment 1, and the position of the load is the same. The experimental steps are as follows;

A1: The length of the hub in Example 2 is longer than that 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 length of the blade reinforcement 1 in Example 1 is The propeller hub is disassembled from the blade reinforcement 1 and the base in Embodiment 1, and the pin shaft 7 is pulled out at the same time, so as to disengage the blade reinforcement 1 in Embodiment 1 from the first shaft 21;

A2: The blade reinforcement 1 in embodiment 2 is fixed on the hub in embodiment 2, and the hub in embodiment 2 is fixed on the base (that is, the base in embodiment 1 is fixed) superior;

A3: Remove the limit nut 4 and the second adjusting washer 52, and remove the key, and pull out the second shaft 22 from the bow clip 3:

A4: Move the adapter shaft 2 away from the base, when the through hole on the first shaft 21 of the adapter shaft 2 for assembling the pin shaft 7 is the same as the through hole used for the assembly pin on the blade reinforcement 1 in Example 2 After the through holes of the shaft 7 correspond, insert the pin shaft 7 into these two through holes, and snap the spring clip 72 on the pin shaft 7;

A5: Reduce the number and thickness of the first adjusting shim 51 on the second shaft 22 according to the length of the blade reinforcement 1 and the centrifugal load loading position in Embodiment 2;

A6: Re-pass the second shaft 22 into the sleeve hole 30 on the bow clip 3, and make the first key groove 301 on the inner wall of the sleeve hole 30 correspond to the second key groove 220 adapted to the position of the second shaft 22, and make the first The keyway 301 is connected to the new corresponding second keyway 220 through a key, and at the same time, the number and thickness of the second adjusting shims 52 sleeved on the second shaft 22 are increased. The number and thickness of the second adjusting shims 52 are all according to the embodiment The length of the blade reinforcement 1 in 2 and the loading position of the centrifugal load are determined;

A7: Re-screw the upper limit nut 4 on the end of the second shaft 22 away from the first shaft 21, and make the limit nut 4 abut against the second adjusting washer 52, the bow clip 3, the first adjusting washer 51 and the shaft shoulder in sequence 20. At the same time, the blade reinforcement 1, the first shaft 21 and the second shaft 22 in Embodiment 2 have the same central axis;

Then repeat step S6 in the embodiment.

Embodiment 3: The length of the hub and the blade reinforcement 1 is equal to the length of the blade hub and the blade reinforcement 1 in Embodiment 1, and the load acting position is farther away from the blade reinforcement 1 than in Embodiment 1. According to Embodiment 2 The method in removes the limit nut 4 and the second adjusting washer 52, and the second shaft 22 is extracted from the bow clamp 3, and then the number and thickness of the first adjusting washer 51 and the second adjusting washer 52 are adjusted so that The number and thickness of the first adjusting gaskets 51 are increased, and the number and thickness of the second adjusting gaskets 52 are decreased. Finally, the centrifugal load test device of the present invention is assembled according to the method of Embodiment 2.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for the related part, please refer to the description of the method part.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not 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 device, characterized in that, comprising: A blade reinforcement (1), the blade reinforcement (1) is detachably connected to the hub; A transfer shaft (2), the transfer shaft (2) is a stepped shaft, including a first shaft (21) and a second shaft (22) with an outer diameter smaller than the first shaft (21), the first One end of the shaft (21) is hinged to the blade reinforcement (1), and the other end is integrally connected to the second shaft (22), and a shoulder (20) is formed at the junction with the second shaft (22), At the same time, the blade reinforcement (1), the first shaft (21) and the second shaft (22) have a common central axis; bow clip (3), the bow clip (3) is fixed on the frame, and sleeved on the second shaft (22), the two ends of the bow clip (3) are located symmetrically on the second shaft On both sides of the axis of (22), at the same time, the end of the second shaft (22) away from the first shaft (21) is detachably connected to the limit nut (4); Adjusting gaskets (5), the adjusting gaskets (5) are sheathed on the second shaft (22), and the number and thickness of the adjusting gaskets (5) are all according to the The length of (1) and the centrifugal load loading position are determined to adjust the distance between the first shaft (21) and the blade reinforcement (1), while the adjustment washer (5) and the bow clip ( 3) abutting between the shoulder (20) and the limit nut (4); Centrifugal load application device (6), the centrifugal load application device (6) is two, one by one connected to the two ends of the bow clip (3), and the two centrifugal load application devices (6) are symmetrical Located on both sides of the axis of the second shaft (22), the two centrifugal load applying devices (6) simultaneously apply the same centrifugal load. 2 . The centrifugal load test device according to claim 1 , characterized in that, one end of the first shaft ( 21 ) is rotatably connected to the blade reinforcement ( 1 ) through a pin shaft ( 7 ). 3 . 3. A centrifugal load test device according to claim 2, characterized in that the positions of the first shaft (21) and the blade reinforcement (1) corresponding to the pin shaft (7) are set There are through holes, the pin shaft (7) is inserted in the two through holes, and the head end of the pin shaft (7) has a limit cap (71), and the pin shaft (7) is close to it A positioning groove is opened on the side wall of the tail end along the circumference, and a spring clip (72) is clamped in the positioning groove. 4. A kind of centrifugal load test device according to claim 1, characterized in that, a sleeve hole (30) is provided on the said bow clip (3) along the axial direction of said second shaft (22), and said A first keyway (301) is opened on the inner wall of the sleeve hole (30), a plurality of second keyway (220) is opened on the second shaft (22) along its axis, and a plurality of the second keyway (220 ) are distributed along the axis of the second shaft (22), and the second shaft (22) can move back and forth along the axis of the second shaft (22) in the sleeve hole (30), so that One second keyway (220) corresponds to the first keyway (301), and the corresponding second keyway (220) is connected to the first keyway (301) through a key. 5. a kind of centrifugal load test device according to claim 1, is characterized in that, described 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 clip (3) by a pin (60); A steel wire rope (62), the steel wire rope (62) is sheathed and fixed on the outer ring of the ball bearing (61); hydraulic cylinder (63), the piston rod of the hydraulic cylinder (63) respectively fixes the two ends of the steel wire rope (62), and the centrifugal load applied by the hydraulic cylinder (63) passes through the steel wire rope (62), the The ball bearing (61), the bow clip (3), the second shaft (22), the first shaft (21), and the blade stiffener (1) are transferred to the hub; A controller, the controller is electrically connected with the hydraulic cylinder (63). 6. A kind of centrifugal load test device according to claim 5, characterized in that, the two ball bearings (61) at both ends of the bow clamp (3) are symmetrical, and the two ends of the bow clamp (3) The steel wire rope (62) is symmetrical, and the hydraulic cylinders (63) at both ends of the bow clamp (3) are symmetrical. 7. A kind of centrifugal load test device according to claim 1, characterized in that, the adjusting pad comprises: a first adjusting pad (51) and a second adjusting pad (52), and the first adjusting pad The number and thickness of the sheet (51) and the second adjusting gasket (52) are determined according to the length of the blade reinforcement (1) and the centrifugal load loading position, and the first adjusting gasket (51 ) abuts between the shoulder (20) and the bow clamp (3), and the second adjusting washer (52) abuts between the bow clamp (3) and the limit nut (4 )between. 8. A test method for centrifugal load test device, is characterized in that, comprises the steps: S1: fix the bow clamp (3) so that the bow clamp (3) remains still; S2: According to the diameter of the hub, the length of the blade, and the location of the centrifugal load, the blade reinforcement (1), and the blade reinforcement (1) is fixed on the hub, and the The propeller hub is fixed on the base; S3: Rotately connect the first shaft (21) of the adapter shaft (2) to the blade reinforcement (1) through the pin shaft (7), and at the same time connect the second shaft of the adapter shaft (2) ( 22) The first adjusting gasket (51) is sheathed on it, and the number and thickness of the first adjusting gasket (51) are determined according to the length of the blade reinforcement (1) and the centrifugal load loading position, and At this time, the first adjusting gasket (51) is arranged close to the shoulder (20) of the adapter shaft (2); S4: Pass the second shaft (22) through the sleeve hole (30) of the bow clip (3), and make one of the second key grooves (220) on the second shaft (22) and the The first keyway (301) on the inner wall of the sleeve hole (30) corresponds, and the second keyway (220) corresponding to each other is connected to the first keyway (301) by a key, and at the same time, the second shaft (22) A second adjusting gasket (52) is sleeved on the top, and the number and thickness of the second adjusting gasket (52) are determined according to the length of the blade reinforcement (1) and the centrifugal load loading position; S5: Screw the limit nut (4) on the end of the second shaft (22) away from the first shaft (21), and make the limit nut (4) abut against the second adjusting washer in sequence (52), the bow clip (3), the first adjusting washer (51) and the shaft shoulder (20), and at the same time make the blade reinforcement (1), the first shaft (21 ) and said second shaft (22) are concentric; S6: The controller controls the centrifugal load applying devices (6) at both symmetrical ends of the bow clip (3) to apply centrifugal loads to the bow clip (3) at the same time, and the centrifugal load applying devices (6) applied by the two centrifugal load applying devices (6) If the load is the same, the centrifugal load is transmitted to the hub through the second shaft (22), the first shaft (21) and the blade reinforcement (1) in sequence, and the centrifugal load test can be completed. 9. the test method of a kind of centrifugal load testing device according to claim 8, is characterized in that, described 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 clip (3) by a pin (60); A steel wire rope (62), the steel wire rope (62) is fixed on the outer ring of the ball bearing (61); hydraulic cylinder (63), the piston rod of the hydraulic cylinder (63) is fixed together with the steel wire rope (62), and the centrifugal load applied by the hydraulic cylinder (63) passes through the steel wire rope (62), the ball The bearing (61), the bow clip (3), the second shaft (22), the first shaft (21), and the blade stiffener (1) are transferred to the hub; a controller, the controller is electrically connected to the hydraulic cylinder (63); Moreover, the two ball bearings (61) at both ends of the bow clip (3) are symmetrical, the steel wire ropes (62) at both ends of the bow clip (3) are symmetrical, and the two ends of the bow clip (3) are symmetrical. Said hydraulic cylinder (63) is symmetrical.

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