Load testing device and testing method for a pod propeller

Abstract

The present disclosure provides a load test device and test method for a pod propeller, belonging to the field of test devices. The load test device comprises a test bench, a connecting structure, a load support structure and a load block. The test bench is connected with the rudder motor and the rudder shaft tube respectively. The connecting structure comprises a winding drum and a steel wire rope. The winding drum is rotatably connected to the test bench and coaxially connected with the rudder shaft tube. The steel wire rope is wound on the winding drum. The load support structure is located on one side of the test bench at intervals. The load block is connected with one end of the steel wire rope to move in the vertical direction under the pulling of the steel wire rope. The moving direction of the load block is the same as the extension direction of the rotating shaft of the winding drum. The load test device can perform load test on the pod propeller.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the field of test devices, and particularly relates to a load test device and test method for a podded propeller. BACKGROUND

[0002] A podded propeller is a kind of ship power device, which is used to provide navigation power for a ship. In order to ensure that the podded propeller can work normally after being installed on the ship, a test device is usually used to test the podded propeller which has not been installed.

[0003] In the related art, the test device is a test stand. When testing, the podded propeller is installed on the test stand, and then a land-based joint debugging test is performed on the podded propeller. The so-called land-based joint debugging test refers to testing the podded propeller on land to verify whether the functional components of the podded propeller can work normally.

[0004] However, since the environment of the podded propeller in the land-based joint debugging test is quite different from the actual working environment, it is impossible to verify whether the functional components of the podded propeller can work normally. SUMMARY

[0005] The present disclosure provides a load test device and test method for a podded propeller, which can perform a load test on the podded propeller. The technical solution is as follows:

[0006] The present disclosure provides a load test device for a podded propeller. The podded propeller includes a rudder turning motor and a rudder turning shaft pipe. The rudder turning shaft pipe is used to rotate under the driving of the rudder turning motor. The load test device includes a test stand, a connecting structure, a load support structure, and a load block. The test stand is connected with the rudder turning motor and the rudder turning shaft pipe, respectively. The connecting structure includes a winding drum and a steel wire rope. The winding drum is rotatably connected to the test stand and coaxially connected with the rudder turning shaft pipe. The rotation axis of the winding drum is arranged in a vertical direction. The steel wire rope is wound on the winding drum. The load support structure is located at one side of the test stand at intervals and is used to reverse the steel wire rope to change the direction of the winding drum from a horizontal direction to a vertical direction. The load block is connected with one end of the steel wire rope to move in the vertical direction under the pulling of the steel wire rope.

[0007] In another implementation manner of the present disclosure, the load support structure includes a load stand and a reversing pulley set. The load stand is located at one side of the test stand at intervals,

[0008] The reversing pulley set comprises a first reversing pulley and a second reversing pulley, rotation axes of the first reversing pulley and the second reversing pulley are parallel to each other and perpendicular to the extension direction of the rotation axis of the winding drum, the first reversing pulley is located between the load carrier and the winding drum, and is used for changing the direction of the wire rope from the winding drum from horizontal to vertical upward, the second reversing pulley is connected with the load carrier, and is used for changing the direction of the wire rope from the first reversing pulley to vertical downward.

[0009] In another implementation manner of the present disclosure, the distance between the second reversing pulley and the first reversing pulley is greater than 3 times the diameter of the winding drum along the moving direction of the load block.

[0010] In another implementation manner of the present disclosure, the second reversing pulley is at least two, and the at least two second reversing pulleys are arranged in parallel to the moving direction of the load block.

[0011] In another implementation manner of the present disclosure, the load carrier comprises a plurality of support rods and a support plate, the support plate has opposite first and second plate surfaces, the first ends of the plurality of support rods are connected with the first plate surface of the support plate, the length direction of the support rods is the same as the moving direction of the load block, and the second reversing pulley is connected with the second plate surface of the support plate.

[0012] In another implementation manner of the present disclosure, the test bench comprises a mounting table and a plurality of supporting legs, the mounting table has opposite first and second table surfaces, the plurality of supporting legs are connected with the first table surface of the mounting table, the steering motor is connected with the second table surface of the mounting table, the steering shaft tube is rotatably connected with the mounting table, and the two ends of the steering shaft tube are located on the first and second table surfaces of the mounting table respectively, and the winding drum is located on the second table surface of the mounting table and between the plurality of supporting legs.

[0013] In another implementation manner of the present disclosure, the connecting structure further comprises a plurality of pressing plates, the plurality of pressing plates are arranged in parallel along the circumferential direction of the winding drum, and the plurality of pressing plates are respectively connected with the outer wall of the winding drum, and the end of the wire rope away from the load block is clamped between the plurality of pressing plates and the outer wall of the winding drum.

[0014] In another implementation manner of the present disclosure, the winding drum has a spiral rope groove along the axial direction of the winding drum, and the wire rope is located in the spiral rope groove; one side of the pressing plate facing the spiral rope groove has a groove, and the width of the groove is the same as the width of the spiral rope groove along the axial direction of the winding drum, and the end of the wire rope away from the load block is clamped between the groove and the spiral rope groove.

[0015] In yet another implementation form of the disclosure, the load block is a heavy metal structure.

[0016] In yet another implementation form of the disclosure, a load test method for a podded propeller is also provided, which is based on the load test device described above, and the test method comprises: connecting the load test device with a podded propeller to be tested together; performing a no-load test on the podded propeller in a state that the steel wire rope is not connected with the load block; and changing the mass of the load block connected with the steel wire rope to perform a load test on the podded propeller.

[0017] The technical solution provided by the embodiments of the disclosure has the following beneficial effects:

[0018] When the load test device provided by the embodiments of the disclosure is used to test the podded propeller, the podded propeller to be tested can be first installed on the test bench, and the rudder shaft tube in the podded propeller is rotatably located on the test bench.

[0019] In addition, the load test device further comprises the connecting structure, the load block and the load support structure, and the winding drum in the connecting structure is coaxially connected with the rudder shaft tube, so that the winding drum can rotate with the rudder shaft tube under the driving of the rudder motor. At the same time, the steel wire rope is connected with the load block, and the load support structure guides the steel wire rope, so that the winding drum can pull the load block to move in the vertical direction when the winding drum rotates, which causes the winding drum to be subjected to the tangential force, which is converted into the load torque of the rudder shaft tube, thereby realizing the load test on the podded propeller.

[0020] That is, during the test, the rudder motor can drive the rudder shaft tube to rotate, the rudder shaft tube drives the winding drum to rotate, and the winding drum winds the steel wire rope when rotating, and the steel wire rope drives the load block to be lifted or lowered. In this way, the no-load test and the load test on the podded propeller can be performed by adjusting the gravity of the load block, so as to verify the reliability of the podded propeller. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the disclosure, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the disclosure, and other drawings can also be obtained by those skilled in the art without any creative effort based on these drawings.

[0022] Figure 1 is a structural schematic view of a load test device for a podded propeller provided by an embodiment of the disclosure;

[0023] Figure 2A top view of the load test device for the podded propeller provided by the embodiment of the present disclosure;

[0024] Figure 3 A structural schematic diagram of the reel provided by the embodiment of the present disclosure;

[0025] Figure 4 A partial structural schematic diagram of the load test device for the podded propeller provided by the embodiment of the present disclosure;

[0026] Figure 5 A structural schematic diagram of another load test device for the podded propeller provided by the embodiment of the present disclosure;

[0027] Figure 6 A flowchart of a load test method for the podded propeller provided by the embodiment of the present disclosure.

[0028] The meanings of the symbols in the figures are as follows:

[0029] 1, test bench; 11, mounting table; 111, center hole; 12, leg; 13, connecting rod; 14, foot;

[0030] 2, connecting structure; 21, reel; 211, spiral rope groove; 22, steel wire rope; 23, pressing plate; 231, groove; 3, load block;

[0031] 4, load support structure; 41, load frame; 411, support rod; 412, support plate; 42, reversing pulley set; 421, first reversing pulley; 422, second reversing pulley; 423, third reversing pulley; 424, fourth reversing pulley;

[0032] 5, control unit; 51, braking resistor; 52, drive starter;

[0033] 101, rudder motor; 102, rudder shaft tube. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be described in further detail below with reference to the drawings.

[0035] In order to clearly illustrate the load test device for the podded propeller provided by the embodiment of the present disclosure, the structure of the podded propeller will be described first.

[0036] The podded propeller includes a rudder structure, a propelling structure and a remote control system. The rudder structure is connected with the ship body (generally connected through welding).

[0037] The rudder turning structure comprises a mounting bracket, a rudder turning shaft tube and a rudder turning driving device. The mounting bracket is connected with the ship body to provide a mounting base for the rudder turning shaft tube and the rudder turning driving device. The rudder turning shaft tube is rotatably connected with the mounting bracket through a slewing bearing. The rudder turning driving device comprises a rudder turning motor (generally a variable frequency motor), a speed reducer, a gear structure (comprising a pinion and a gear wheel which are in mesh with each other). The rudder turning driving device is connected with the mounting bracket, and the rudder turning driving device is used to drive the rudder turning shaft tube to rotate.

[0038] During operation, the rudder turning motor and the speed reducer are controlled to rotate, then the speed reducer drives the pinion to rotate, the pinion drives the gear wheel in mesh with the pinion to rotate, and the gear wheel drives the rudder turning shaft tube to rotate, so that the 360-degree direction slewing of the rudder turning shaft tube is realized.

[0039] The propelling structure is connected with the rudder turning shaft tube to realize the 360-degree slewing of the propelling structure. The remote control system is electrically connected with the rudder turning driving device to control the on-off state of the rudder turning motor and the speed reducer.

[0040] When the podded propeller is subjected to the land-based joint debugging test, the podded propeller is in the air, and the air density is far less than the density of seawater, so that the load borne by the podded propeller is far less than the load borne by the podded propeller when it is actually installed on a ship and runs in water, and thus the reliability of the podded propeller cannot be verified.

[0041] The embodiments of the present disclosure provide a load test device for a podded propeller, as shown in Figure 1 The load test device comprises a test bench 1, a connecting structure 2, a load supporting structure 4 and a load block 3. The test bench 1 is connected with a rudder turning motor 101 and a rudder turning shaft tube 102 respectively.

[0042] The connecting structure 2 comprises a winding drum 21 and a steel wire rope 22. The winding drum 21 is rotatably connected to the test bench 1, and the winding drum 21 is coaxially connected with the rudder turning shaft tube 102. The rotation axis of the winding drum 21 is arranged in the vertical direction, and the steel wire rope 22 is wound on the winding drum 21. The load supporting structure 4 is located at one side of the test bench 1 at intervals, and is used to reverse the steel wire rope 22 to change the direction of the winding drum 21 from the horizontal direction to the vertical direction. The load block 3 is connected with one end of the steel wire rope 22 to move in the vertical direction under the pulling of the steel wire rope 22.

[0043] When the podded propeller is tested by the load test device provided by the embodiments of the present disclosure, since the load test device comprises the test bench 1, the podded propeller to be detected can be first installed on the test bench 1, and the rudder turning shaft tube 102 in the podded propeller is rotatably located on the test bench 1.

[0044] Since the load test device further comprises the connecting structure 2, the load block 3 and the load support structure 4, and the winding drum 21 in the connecting structure 2 is coaxially connected with the rudder shaft pipe 102, the winding drum 21 can rotate along with the rudder shaft pipe 102 under the driving of the rudder motor 101. Meanwhile, the winding drum 21 is connected with the load block 3 through the steel wire rope 22, and the load support structure 4 guides the steel wire rope 22, so that the winding drum 21 can pull the load block 3 to move in the vertical direction when rotating, and the tangential force of the winding drum 21 is converted into the load torque of the rudder shaft pipe 102, thereby realizing the load test of the podded propulsor.

[0045] That is, during the test, the rudder motor 101 can drive the rudder shaft pipe 102 to rotate, the rudder shaft pipe 102 drives the winding drum 21 to rotate, the winding drum 21 winds the steel wire rope 22 when rotating, and the steel wire rope 22 drives the load block 3 to be lifted or lowered. In this way, the load block 3 can be adjusted to have different weights, and the podded propulsor can be tested under no load and under load to verify the reliability of the podded propulsor.

[0046] Optionally, the test bench 1 comprises a mounting table 11 and a plurality of supporting legs 12. The mounting table 11 has opposite first and second table surfaces, the plurality of supporting legs 12 are connected with the first table surface of the mounting table 11, the rudder motor 101 is connected with the second table surface of the mounting table 11, the rudder shaft pipe 102 is rotatably arranged on the mounting table 11, and the two ends of the rudder shaft pipe 102 are located on the first and second table surfaces of the mounting table 11 respectively, and the winding drum 21 is located on the second table surface of the mounting table 11 and between the plurality of supporting legs 12.

[0047] In the above implementation manner, the test bench 1 is arranged in the above structure, the test bench 1 can be fixed in the test site to be tested through the supporting legs 12, and the mounting table 11 can be supported through the supporting legs 12, so that the mounting table 11 has a certain height. The mounting table 11 can support the podded propulsor to be tested, so that the podded propulsor to be tested can be connected with the winding drum 21.

[0048] Figure 2 The load test device for the podded propulsor provided by the embodiment of the present disclosure is shown in a top view, which is combined with Figure 2 For example, the mounting table 11 is a hexagonal plate structure, and the mounting table 11 has a central hole 111 in the middle, and the rudder shaft pipe 102 of the podded propulsor to be tested is located in the central hole 111.

[0049] The above arrangement facilitates the mounting table 11 to place the podded propulsor to be tested.

[0050] Continuing to refer to Figure 1 and Figure 2Optionally, the test bench 1 further comprises a plurality of connecting rods 13, each of which is connected between two adjacent supporting legs 12.

[0051] In the above implementation, the arrangement of the plurality of connecting rods 13 can increase the connection firmness between the supporting legs 12, thereby improving the overall stability of the test bench 1.

[0052] Optionally, the test bench 1 further comprises a plurality of supporting feet 14, which are arranged in one-to-one correspondence with the plurality of supporting legs 12, and each of which is connected to an end of the corresponding supporting leg 12 away from the mounting table 11.

[0053] In the above implementation, the arrangement of the supporting feet 14 can increase the contact area of the supporting legs 12 on the ground, thereby improving the degree of stable support of the test bench 1 on the ground.

[0054] For example, during testing, the supporting feet 14 can be directly welded to the ground of the corresponding test site, so that the test bench 1 can be stably fixed in the test site.

[0055] Again referring to Figure 1 and Figure 2 , the load support structure 4 comprises a load frame 41 and a reversing pulley set 42. The load frame 41 is spaced apart from one side of the test bench 1. The reversing pulley set 42 comprises a first reversing pulley 421 and a second reversing pulley 422, the rotation axes of the first reversing pulley 421 and the second reversing pulley 422 are parallel to each other, and both are perpendicular to the extension direction of the rotation axis of the winding drum 21. The first reversing pulley 421 is located between the load frame 41 and the winding drum 21, and is used to change the direction of the wire rope 22 from the horizontal direction to the vertical upward direction. The second reversing pulley 422 is connected to the load frame 41, and is used to change the direction of the wire rope 22 extending from the first reversing pulley 421 to the vertical downward direction.

[0056] In the above implementation, the load frame 41 is used to provide a mounting basis for the second reversing pulley 422. The first reversing pulley 421 is used to change the direction of the wire rope 22 from the horizontal direction to the vertical upward direction, and the second reversing pulley 422 is used to change the direction of the wire rope 22 extending from the first reversing pulley 421 to the vertical downward direction. In this way, the wire rope 22 can be guided by the first reversing pulley 421 and the second reversing pulley 422, and the load block 3 can be pulled to move up and down by the wire rope 22.

[0057] Optionally, the distance between the second reversing pulley 422 and the first reversing pulley 421 along the moving direction of the load block 3 is greater than 3 times the diameter of the winding drum 21.

[0058] In the above implementation, the distance between the second reversing pulley 422 and the first reversing pulley 421 is greater than 3 times the diameter of the winding drum 21, so that the winding drum 21 can rotate at least one circle when the corresponding load block 3 can achieve the maximum displacement. That is, the load block 3 is within the maximum stroke, the winding drum 21 can rotate at least one circle, and the corresponding steering shaft tube 102 can rotate at least one circle, so as to verify whether the corresponding function of the pod propeller meets the requirements when completing 360-degree rotation.

[0059] Exemplarily, the second reversing pulley 422 is at least two, and the at least two second reversing pulleys 422 are arranged in parallel with respect to the moving direction of the load block 3.

[0060] In the above implementation, the second reversing pulley 422 is provided as two, which can increase the distance between the load block 3 and the winding drum 21, and further adjust the length of the steel wire rope 22, so as to avoid that the load block 3 is disturbed when moving.

[0061] Continuing to refer to Figure 2 , in addition, in order to guide the steel wire rope 22, the reversing pulley set 42 further comprises a third reversing pulley 423 and a fourth reversing pulley 424, wherein the third reversing pulley 423 and the fourth reversing pulley 424 are respectively located between the winding drum 21 and the first reversing pulley 421.

[0062] Again referring to Figure 1 , optionally, the load carrier 41 comprises a plurality of support rods 411 and a support plate 412, the support plate 412 has opposite first and second plate surfaces, the first ends of the plurality of support rods 411 are connected to the first plate surface of the support plate 412, and the length direction of the support rod 411 is the same as the moving direction of the load block 3. The second reversing pulley 422 is connected to the second plate surface of the support plate 412.

[0063] In the above implementation, the load carrier 41 is provided as a plurality of support rods 411 and a support plate 412, so that the support rods 411 can provide support for the support plate 412. The support plate 412 can provide a mounting basis for the second reversing pulley 422.

[0064] It should be noted that, in order to simplify Figure 1 , Figure 1 , the support rod 411 is replaced by a line.

[0065] Optionally, the support rod 411 and the support plate 412 can be welded together, which is convenient for assembly and can improve the structural strength of the load carrier 41.

[0066] Exemplarily, the second reversing pulley 422 is connected to the second surface of the support plate 412 through a pulley mounting seat. In this way, the installation and arrangement of the second reversing pulley 422 are facilitated.

[0067] Figure 3 is a structural schematic diagram of a winding drum provided by the embodiments of the present disclosure, in combination with Figure 3 Optionally, the connecting structure 2 further comprises a plurality of pressing plates 23, the plurality of pressing plates 23 are arranged along the circumference of the winding drum 21, and the plurality of pressing plates 23 are respectively connected with the outer wall of the winding drum 21, and the end of the steel wire rope 22 away from the load block 3 is clamped between the plurality of pressing plates 23 and the outer wall of the winding drum 21.

[0068] In the above implementation manner, the arrangement of the plurality of pressing plates 23 can press the end of the steel wire rope 22 away from the load block 3 on the winding drum 21 without being detached.

[0069] Optionally, the winding drum 21 has a spiral rope groove 211 along the axis direction of the winding drum 21, and the steel wire rope 22 is located in the spiral rope groove 211. The side of the pressing plate 23 facing the spiral rope groove 211 has a groove 231, and along the axis direction of the winding drum 21, the width of the groove 231 is the same as the width of the spiral rope groove 211, and the end of the steel wire rope 22 away from the load block 3 is clamped between the groove 231 and the spiral rope groove 211.

[0070] In the above implementation manner, the spiral rope groove 211 is arranged on the winding drum 21 along the axis direction of the winding drum 21, so that the steel wire rope 22 can be stably located in the spiral rope groove 211, and at the same time, when the winding drum 21 rotates, the steel wire rope 22 can be orderly and quickly wound or released. The groove 231 arranged in the pressing plate 23 can cooperate with the spiral rope groove 211 to accommodate and press the end of the steel wire rope 22 away from the load block 3.

[0071] Exemplarily, the spiral rope groove 211 is in the form of a standard groove, which is convenient for processing.

[0072] Exemplarily, the pressing plate 23 is four, and the four pressing plates 23 are uniformly arranged at the end of the winding drum 21 along the circumference of the winding drum 21. In this way, the pressing effect of the pressing plate 23 on the steel wire rope 22 can be improved to ensure that the rope end of the steel wire rope 22 will not be detached.

[0073] Optionally, the steel wire rope 22 is wound on the winding drum 21 in a single-layer winding manner. That is, the steel wire rope 22 has only one layer, and the winding drum 21 is a single-layer winding drum. In this way, the situation that the steel wire rope 22 is detached can be avoided.

[0074] In order to facilitate the fixing of the pressing plate 23 on the winding drum 21, the pressing plate 23 is fastened on the outer wall of the winding drum 21 by screws.

[0075] Exemplarily, each pressing plate 23 has two grooves 231, and the two grooves 231 are respectively located on both sides of the axis of the screw, and the two grooves 231 are arranged in correspondence with two turns of the spiral rope groove 211.

[0076] Exemplarily, when the reel 21 is fixedly connected with the rudder shaft pipe 102, in order to reduce the force of the steel wire rope 22 on the rudder shaft pipe 102, 5 safety turns are needed to be left on the reel 21 before the reel 21 is fixed with the rudder shaft pipe 102. Therefore, the effective number of turns of the spiral rope groove 211 should be at least 7.

[0077] Optionally, the load block 3 is a heavy metal structure.

[0078] In the above implementation, the load block 3 is set as a heavy metal structure, so that the load block 3 can have a larger weight in a limited volume, thereby being able to meet the load test of the podded propeller.

[0079] Figure 4 is a partial structure schematic diagram of the load test device for the podded propeller provided by the embodiment of the present disclosure, which is combined with Figure 4 In order to facilitate the dismounting connection between the reel 21 and the rudder shaft pipe 102, in the embodiment of the present disclosure, the reel 21 and the rudder shaft pipe 102 are coaxially connected together through fasteners such as screws.

[0080] Figure 5 is another structure schematic diagram of the load test device for the podded propeller provided by the embodiment of the present disclosure, which is combined with Figure 5 Optionally, the load test device further comprises a control unit 5, the control unit 5 comprising a braking resistor 51 and a driving starter 52, the braking resistor 51 being electrically connected with the driving starter 52, and the driving starter 52 being electrically connected with the rudder motor 101.

[0081] The above arrangement of the control unit 5 can facilitate the control of the rudder motor 101, so as to correspondingly implement different tests.

[0082] In the embodiment, when the rudder motor 101 is started, the rudder motor 101 drives the pinion gear to rotate through the speed reducer, the pinion gear drives the gear wheel engaged therewith to rotate, and the gear wheel can drive the rudder shaft pipe 102 and the reel 21 to rotate. The reel 21 winds the steel wire rope 22 through the spiral rope groove 211, and the steel wire rope 22 drives the load block 3 to be lifted or lowered through the reversing pulley block 42.

[0083] At this time, the load size of the podded propeller is T=G*R / η, wherein G is the gravity size of the load block 3, R is the radius of the reel 21, and η is the efficiency of the reversing pulley block 42.

[0084] By adjusting the gravity size of the load block 3, the podded propeller can be subjected to the no-load test and the load test, so as to verify the reliability of the podded propeller, and by controlling the braking time of the rudder motor 101, the emergency braking function of the podded propeller can be verified.

[0085] The working mode of the load testing device provided in the embodiments of the present disclosure is briefly introduced as follows:

[0086] After the control unit 5 is electrically connected with the pod propeller, the corresponding test can be performed.

[0087] For example, when the no-load test is performed, the following operation mode can be adopted:

[0088] The steel wire rope 22 does not suspend the load block 3, the steering motor 101 is turned on, the steering motor 101 drives the steering shaft pipe 102 to rotate, and the steering shaft pipe 102 drives the winch 21 to rotate. When the steering motor 101 drives the steering shaft pipe 102 to rotate, the rotation speed of the steering shaft pipe 102 can be lower than the actual working rotation speed, and the clockwise and counterclockwise rotations should not be less than one circle. Whether the rotation process of the pod propeller is smooth or whether there is a jamming phenomenon and the like are checked.

[0089] For example, when the load test is performed, the following operation mode can be adopted:

[0090] The steel wire rope 22 suspends the load block 3. The steering motor 101 is turned on, and the rotation direction of the steering motor 101 is adjusted to control the clockwise and counterclockwise rotations of the winch 21.

[0091] The winch 21 realizes the ascending and descending of the load block 3 by winding and unwinding the steel wire rope 22. The rotation speed of the steering shaft pipe 102 is the actual working rotation speed, and the clockwise and counterclockwise rotations should not be less than two circles. Whether the rotation process is smooth or whether there is a jamming phenomenon, noise and the like are checked.

[0092] For example, when the emergency braking test is performed, the following operation mode can be adopted:

[0093] The steel wire rope 22 suspends the load block 3. The steering motor 101 is turned on, and the rotation speed is the actual working rotation speed. The load block 3 is lifted so that the rotation of the winch 21 is not less than one circle, and then the lowering action is performed. During the lowering process, the emergency braking is performed, the braking time is set, and whether the steering motor and the brake are normally operated and whether there is an abnormal noise and the like are checked.

[0094] It can be seen that the above device can simultaneously realize the no-load test, the load test and the emergency braking test of the pod propeller.

[0095] In addition, the embodiments of the present disclosure also provide a load testing method for a pod propeller, as shown in Figure 6 The load testing method is based on the above load testing device, and the testing method comprises the following steps:

[0096] S601: Connect the load testing device with the pod propeller to be tested together.

[0097] S602: In the state that the steel wire rope is not connected with the load block, the load-free test is performed on the pod propeller.

[0098] S603: The load test is performed on the pod propeller by changing the mass of the load block connected with the steel wire rope.

[0099] The above method has the same beneficial effects as the foregoing device, which will not be repeated here.

[0100] The above only describes optional embodiments of the present disclosure and is not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A load testing device for a podded propulsor, the podded propulsor comprising a rudder motor (101) and a rudder shaft tube (102) for rotation under drive of the rudder motor (101), characterized in that, The load test device comprises a test bench (1), a connecting structure (2), a load support structure (4) and a load block (3); The test bench (1) comprises a mounting table (11) and a plurality of supporting legs (12), the mounting table (11) is a plate-shaped structure, the mounting table (11) has opposite first and second table surfaces, the plurality of supporting legs (12) are connected with the first table surface of the mounting table (11), the rudder turning motor (101) is connected with the second table surface of the mounting table (11), the mounting table (11) has a central hole (111) in the middle part, the rudder turning shaft tube (102) is located in the central hole (111) and is rotatably connected with the mounting table (11), the two ends of the rudder turning shaft tube (102) are located on the first and second table surfaces of the mounting table (11) respectively; The connecting structure (2) comprises a winding drum (21) and a steel wire rope (22), the winding drum (21) is located on the second table surface of the mounting table (11) and between the plurality of supporting legs (12), and the winding drum (21) is rotatably connected with the test bench (1), the winding drum (21) is coaxially connected with the rudder turning shaft tube (102), the rotation axis of the winding drum (21) is arranged in the vertical direction, and the steel wire rope (22) is wound on the winding drum (21); The load support structure (4) is located on one side of the test bench (1) at intervals and is used for reversing the steel wire rope (22) to change the wire direction of the winding drum (21) from the horizontal direction to the vertical direction, the load support structure (4) comprises a load frame (41) and a reversing pulley set (42), the reversing pulley set (42) comprises a first reversing pulley (421) and a second reversing pulley (422), the first reversing pulley (421) is used for changing the wire direction of the winding drum (21) from the horizontal direction to the vertical upward direction, and the second reversing pulley (422) is used for changing the direction of the steel wire rope extending from the first reversing pulley (421) to the vertical downward direction; The load block (3) is connected with one end of the steel wire rope (22) to move in the vertical direction under the pulling of the steel wire rope (22), the spacing between the second reversing pulley (422) and the first reversing pulley (421) is greater than 3 times the diameter of the winding drum (21) along the moving direction of the load block (3), the load block (3) is within the maximum stroke, and the winding drum (21) rotates at least one circle.

2. The load testing device of claim 1, wherein, The load frame (41) is located on one side of the test bench (1) at intervals, The rotation axes of the first reversing pulley (421) and the second reversing pulley (422) are parallel to each other and are perpendicular to the extension direction of the rotation axis of the winding drum (21), the first reversing pulley (421) is located between the load frame (41) and the winding drum (21), The second reversing pulley (422) is connected with the load frame (41).

3. The load testing device of claim 1, wherein, The second reversing pulley (422) is at least two, and the at least two second reversing pulleys (422) are arranged in parallel to the moving direction of the load block (3).

4. The load testing device of claim 2, wherein, The load frame (41) comprises a plurality of support rods (411) and a support plate (412), the support plate (412) has opposite first and second plate surfaces, The first ends of the plurality of support rods (411) are connected to the first plate surface of the support plate (412), and the length direction of the support rods (411) is the same as the moving direction of the load block (3), The second reversing pulley (422) is connected to the second plate surface of the support plate (412).

5. The load testing device of any one of claims 1 to 4, wherein, The connecting structure (2) further comprises a plurality of pressing plates (23), the plurality of pressing plates (23) are arranged in parallel along the circumference of the winding drum (21), and the plurality of pressing plates (23) are respectively connected to the outer wall of the winding drum (21), and one end of the steel wire rope (22) away from the load block (3) is clamped between the plurality of pressing plates (23) and the outer wall of the winding drum (21).

6. The load testing device of claim 5, wherein, The winding drum (21) has a spiral rope groove (211) along the axis direction of the winding drum (21), and the steel wire rope (22) is located in the spiral rope groove (211); The side of the pressing plate (23) facing the spiral rope groove (211) has a groove (231), and along the axis direction of the winding drum (21), the width of the groove (231) is the same as the width of the spiral rope groove (211), and one end of the steel wire rope (22) away from the load block (3) is clamped between the groove (231) and the spiral rope groove (211).

7. The load testing device of any one of claims 1 to 4, wherein, The load block (3) is a heavy metal structural member.

8. A load test method for a pod propeller, the load test method being implemented based on the load test device according to any one of claims 1 to 7, characterized in that, The test method comprises: The load test device is connected with the nacelle propeller to be tested; The nacelle propeller is tested under no-load condition of the steel wire rope not connected with the load block; The nacelle propeller is tested under load condition of the steel wire rope connected with the load block.

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