Marine propulsion blade power testing device

Abstract

The application relates to the field of ship propulsion technology, in particular to a ship propulsion blade power testing device, which mainly comprises a test pool, and a bearing bridge frame is fixedly installed at the right end of the test pool. Through a three-stage wake treatment structure of a circular arc channel, a backflow cavity and an outer pool buffer, ordered energy dissipation and isolation of the wake flow are realized: the wake flow generated by the propulsion impeller first smoothly turns around through the circular arc channel to avoid secondary turbulence caused by sudden turning; then, through the flow stabilizing effect of the guide member in the backflow cavity, the wake flow is ensured to overflow from the overflow opening without turbulence; finally, the kinetic energy is naturally consumed in the outer pool water body, the path of the wake flow backtracking to the test cavity is completely cut off, flow field interference caused by the accumulation of the wake flow kinetic energy is avoided, meanwhile, the backflow mechanism supplements water to the inflow area through the symmetrically arranged water supplement holes in front of and behind the concave part, the water flow collides to offset the kinetic energy, the inflow area flow field is further stabilized, and a reliable environment is provided for the accurate measurement of core parameters such as thrust and torque.

Description

Technical Field

[0001] This invention relates to the field of ship propulsion technology, specifically to a power testing device for ship propulsion blades. Background Technology

[0002] Current ship propulsion blade power testing devices are mostly based on a fixed test pool, with simple power drive components and data acquisition modules to achieve basic testing functions. Typically, a fixed mounting frame is pre-set in the test pool, and the propulsion impeller is fixed to the mounting frame with bolts and other connecting parts. The impeller is driven to rotate by a motor, and parameters such as thrust and torque are collected by sensors.

[0003] However, existing ship propulsion blade dynamic testing devices have obvious limitations: First, they lack flow field control capabilities, and the wake kinetic energy generated by the impeller rotation is prone to accumulate in the test pool, forming a turbulent interference inflow area, which leads to test data deviation; Second, they have poor adaptability to operating conditions, and the impeller disassembly and assembly requires the removal of multiple components, resulting in low replacement efficiency. Furthermore, it is difficult to adjust the impeller immersion depth and simulate complex water flow scenarios such as wake flow during real navigation, making it difficult to meet the requirements of high-precision, multi-condition blade dynamic testing.

[0004] Therefore, there is an urgent need to design a power testing device for ship propulsion blades to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a power testing device for ship propulsion blades, in order to solve the problems mentioned in the background art, such as insufficient flow field control capability, easy interference of wake with test data, cumbersome impeller disassembly and assembly, poor adaptability to operating conditions, and difficulty in meeting the requirements of high-precision, multi-condition blade power testing.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A ship propulsion blade power testing device includes: a test pool, a support bridge fixedly installed at the right end of the test pool, a positioning mechanism fixedly installed in the middle of the support bridge, a test assembly fixedly installed on the positioning mechanism, a power mechanism fixedly installed on the test assembly, one end of the power mechanism extending into the interior of the test pool and fixedly installed on a fixed base, a propulsion impeller detachably installed on the fixed base, the positioning mechanism can not only rotate the propulsion impeller in a horizontal plane, but also move the propulsion impeller back and forth in the vertical direction, a wave-making mechanism fixedly installed on the side of the support bridge, and a return flow mechanism fixedly installed inside the test pool. The power mechanism drives the propulsion impeller to rotate through the fixed base, thereby driving water flow. The front side of the propulsion impeller is the inflow area, and the rear side of the propulsion impeller forms a wake. The test pool consumes the kinetic energy of the wake, and the return flow mechanism replenishes water to the inflow area to maintain the stability of the inflow area.

[0008] Preferably, the test pool includes an inner pool with two interlocking arc-shaped walls at its right end. A concave partition is fixedly connected to the bottom surface of the inner pool cavity, with both ends of the concave partition extending into the two arc-shaped walls. The end faces of the concave partition have rounded chamfers. The arc-shaped walls and the rounded chamfers share a central axis. An arc-shaped channel is formed between the inner surface of the arc-shaped walls and the rounded chamfers. A test cavity is formed inside the concave partition. Two reflux cavities are formed between the outer surface of the concave partition and the inner wall of the inner pool. The two reflux cavities are respectively connected to the corresponding arc-shaped channels. Two openings are located on the top surface of the inner pool at its left end. The inner pool has two overflow openings: one spanning the back and left end face of the inner pool, and the other spanning the front and left end face of the inner pool. The two overflow openings are connected to the corresponding return cavities. A guide member is fixedly connected to the left end of the inner wall of the return cavity. The guide member has a right-angled triangle cross-section. An outer pool is fitted around the inner pool. The inner pool is fixedly connected to the bottom surface of the inner cavity of the outer pool and located at its right end. A fixed horizontal plate is fixedly installed on the top surface of the concave partition. A detector is fixedly inserted into the middle of the fixed horizontal plate. The detector monitors the liquid level inside the test cavity.

[0009] Preferably, the load-bearing bridge includes a first perforation and a bridge panel. The first perforation is opened on the front and rear sides of the outer pool and located at its right end. The bridge panel is mounted on the top surface of the inner pool, the concave partition, and the outer pool. Limiting plates are fixedly connected to both ends of the bottom surface of the bridge panel. A second perforation is opened on the limiting plate. A bolt is provided inside the second perforation. The bolt passes through the first perforation and fixes the limiting plate to the outer pool. A control cabinet is fixedly installed at one end of the top surface of the bridge panel.

[0010] Preferably, the positioning mechanism includes a through hole and an insert ring. The through hole is located at the center of the top surface of the bridge deck. The insert ring is fixedly connected to the top surface of the bridge deck. The insert ring and the through hole share a central axis. A lifting bearing is fixedly installed inside the insert ring. A worm gear motor is installed inside the lifting bearing. The worm gear motor is fixedly installed on the bottom surface of the bridge deck. The output shaft of the worm gear motor passes through the through hole and the lifting bearing and is fixedly connected to a square cylinder. The square cylinder is fixedly connected to the top surface of the lifting bearing.

[0011] Preferably, the top of the square cylinder is open, a square cover plate is bolted to the top surface of the square cylinder, a rectangular sliding hole is opened on the side of the square cylinder facing the left side of the bridge panel, a servo motor is bolted to the bottom surface of the inner cavity of the square cylinder, a drive screw is fixedly connected to the top of the output shaft of the servo motor, the top of the drive screw is movably sleeved on the bottom surface of the square cover plate, a drive slider is threadedly sleeved on the outside of the drive screw, the drive slider is slidably inserted into the inside of the square cylinder, a linkage plate is fixedly connected to the surface of the drive slider, and the other end of the linkage plate passes through the rectangular sliding hole and is fixedly connected to the test integration.

[0012] Preferably, the power mechanism includes a power base, which is fixedly installed on the surface of the test integration away from the linkage board. A power flat tube is fixedly installed on the bottom surface of the power base. The bottom end of the power flat tube extends into the test cavity and is fixedly connected to a power cylinder. A small mounting hole is opened on the end face of the power cylinder. A power motor is bolted to the top surface of the power base. A power long rod is fixedly connected to the bottom end of the output shaft of the power motor. The bottom end of the power long rod passes through the power base and the power flat tube and extends into the power cylinder, where a drive bevel gear is fixedly installed. A transmission rod is movably inserted into the small mounting hole. One end of the transmission rod passes through the power cylinder. A transmission bevel gear located inside the power cylinder is fixedly sleeved on the outside of the transmission rod. The transmission bevel gear meshes with the drive bevel gear. The other end of the transmission rod is fixedly connected to the fixed base.

[0013] Preferably, the fixed base includes a fixed base plate, which is fixedly connected to the end of the transmission rod. A fixed shaft and a fixed protrusion are fixedly connected to the other side of the fixed base plate. The fixed protrusion is fixedly connected to the surface of the fixed shaft. An internal threaded hole is opened on the end face of the fixed shaft. The transmission rod, the fixed base plate, the fixed shaft, and the internal threaded hole share a central axis. A threaded post is inserted into the internal threaded hole with a threaded fit. A rotating cap is fixedly connected to the other end of the threaded post. A flow divider cone is fixedly connected to the other end of the rotating cap. The propulsion impeller is installed between the fixed base plate and the rotating cap.

[0014] Preferably, the propulsion impeller includes a mounting sleeve, which is sleeved outside the fixed shaft and clamped between the fixed base plate and the rotating cap. A positioning groove is provided on the inner wall of the mounting sleeve, and a fixing protrusion is inserted into the positioning groove. Five blade bodies are fixedly connected at equal intervals on the outer surface of the mounting sleeve.

[0015] Preferably, the wave-generating mechanism includes two sets of fixed wall panels, which are symmetrically arranged on the left side of the bridge deck. Each set has two fixed wall panels, which are fixedly connected to the left side of the bridge deck. A fixed shaft is fixedly connected between the two fixed wall panels in the same set. A flip arm is rotatably sleeved on the fixed shaft. The other end of the flip arm is inclined upward and fixedly connected to a telescopic rod. The other end of the telescopic rod is movably inserted into a linkage shaft. A wave-generating plate is fixedly connected between the two linkage shafts. A central shaft located at the bottom of the wave-generating plate is fixedly connected to the side of the wave-generating plate. The other end of the central shaft is movably inserted into the inner wall of the concave partition. The wave-generating plate is movably inserted into the test chamber and located at its left end.

[0016] Preferably, the wavemaker plate has multiple fixed threaded holes at equal intervals. An external threaded tube is inserted into the fixed threaded hole through a threaded fit. The other end of the external threaded tube is fixedly connected to a fixed cylinder. The fixed cylinder is filled with a rubber diaphragm. An elastic strip is fixedly connected to the top surface of the rubber diaphragm. A sealing disc is installed inside the fixed cylinder through a threaded fit. The sealing disc presses the rubber diaphragm against the inner wall of the fixed cylinder through the elastic strip. The sealing disc has multiple water passage holes.

[0017] Preferably, the concave partition is hollow, and the reflux mechanism includes multiple water inlet holes and a plug hole. The multiple water inlet holes are symmetrically opened on the front and rear surfaces of the inner side of the concave partition and located at the left end of the test chamber. The water inlet holes communicate with the hollow cavity inside the concave partition. The plug hole is opened on the left end face of the concave partition and communicates with the hollow cavity inside the concave partition. A circulation pipe is fixedly inserted into the plug hole. An electronic flow meter is fixedly installed on the circulation pipe. The other end of the circulation pipe is fixedly connected to a submersible pump. The submersible pump is bolted to the bottom surface of the inner cavity of the outer pool.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This device employs a three-stage wake treatment structure—an arc-shaped channel, a return cavity, and an outer pool buffer—to achieve orderly energy dissipation and isolation of wake kinetic energy. The wake generated by the propulsion impeller is first smoothly guided and turned around through the arc-shaped channel, avoiding secondary turbulence caused by abrupt changes in direction. Then, the flow stabilization effect of the guiding components within the return cavity ensures that the wake overflows from the overflow opening without disturbance. Finally, it flows into the water in the outer pool to naturally dissipate kinetic energy, completely cutting off the path of the wake back to the test cavity and preventing flow field interference caused by the accumulation of wake kinetic energy. Simultaneously, the return mechanism replenishes water to the inflow area through symmetrical water inlets before and after the concave partition. The water flow counteracts the kinetic energy, further maintaining the stability of the flow field in the inflow area and providing a reliable environment for the accurate measurement of core parameters such as thrust and torque.

[0020] This device achieves rapid assembly and disassembly of the propulsion impeller and adaptability to multiple operating conditions through the coordinated design of the positioning mechanism and the fixed base: In the positioning mechanism, the servo motor drives the drive screw to rotate, which can drive the propulsion impeller to move up and down precisely in the vertical direction, and can be used to adjust the water depth; the worm gear motor drives the square cylinder to rotate through the lifting bearing, which can rotate the propulsion impeller to the top of the bridge panel for assembly and disassembly without disassembling other components; the fixed base is fixed by the positioning fit of the fixed protrusion and the positioning slide groove and the clamping fixation of the threaded column. The propulsion impeller can be assembled and disassembled by simply rotating the rotating cap, which greatly shortens the replacement time. In addition, the flow divider can optimize the water flow distribution in the inflow area and adapt to the testing requirements of different impeller specifications.

[0021] This device has dual water flow control capabilities: On the one hand, the detector monitors the liquid level in the test chamber in real time. After the data is fed back to the control cabinet, the operating power of the submersible pump can be automatically adjusted. Combined with the precise measurement of the replenishment volume by the electronic flow meter, the liquid level is kept stable within the set range, avoiding changes in the impeller immersion depth caused by liquid level fluctuations. On the other hand, the wave-making mechanism can drive the wave-making plate to simulate water flow disturbances of different intensities at the left end of the test chamber by flipping the rotating arm and extending the telescopic rod. The rubber diaphragm and elastic strip inside the fixed cylinder can buffer the water flow impact, realizing the simulation of complex water flow scenarios such as wakes during real navigation, thus expanding the testing application range of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0024] Figure 3 For the present invention Figure 1 A schematic diagram of the three-dimensional structure of the test pool;

[0025] Figure 4 For the present invention Figure 2 A three-dimensional structural diagram of the intermediate reflux mechanism;

[0026] Figure 5 For the present invention Figure 1 A three-dimensional structural diagram of the positioning mechanism;

[0027] Figure 6 For the present invention Figure 5 A three-dimensional structural diagram of a load-bearing cable tray;

[0028] Figure 7 For the present invention Figure 5 A three-dimensional structural diagram of the positioning mechanism;

[0029] Figure 8 For the present invention Figure 7 A schematic diagram of the split structure;

[0030] Figure 9 For the present invention Figure 7 A schematic diagram of the disassembled structure of the fixed base;

[0031] Figure 10 For the present invention Figure 5 A three-dimensional structural diagram of the wave generator;

[0032] Figure 11 For the present invention Figure 10 A schematic diagram of the disassembled structure of the central fixed cylinder.

[0033] In the picture:

[0034] 1. Test pool; 101. Inner pool; 102. Arc wall; 103. Concave partition; 104. Arc chamfer; 105. Arc channel; 106. Test chamber; 107. Return chamber; 108. Overflow opening; 109. Guide component; 110. Outer pool; 111. Fixed cross plate; 112. Detector;

[0035] 2. Load-bearing cable tray; 201. First through hole; 202. Cable tray deck; 203. Limiting plate; 204. Second through hole; 205. Control cabinet;

[0036] 3. Positioning mechanism; 301. Through hole; 302. Embedded ring; 303. Lifting bearing; 304. Worm gear motor; 305. Square cylinder; 306. Square cover plate; 307. Rectangular sliding hole; 308. Servo motor; 309. Drive screw; 310. Drive slider; 311. Linkage plate;

[0037] 4. Test integration;

[0038] 5. Power mechanism; 501. Power base; 502. Power flat tube; 503. Power cylinder; 504. Mounting hole; 505. Power motor; 506. Power rod; 507. Drive bevel gear; 508. Transmission rod; 509. Transmission bevel gear;

[0039] 6. Fixed base; 601. Fixed base plate; 602. Fixed shaft; 603. Fixed protrusion; 604. Internal threaded hole; 605. Threaded post; 606. Rotating cap; 607. Diverter cone;

[0040] 7. Propulsion impeller; 701. Mounting sleeve; 702. Positioning groove; 703. Blade body;

[0041] 8. Wave-making mechanism; 801. Fixed wall panel; 802. Fixed shaft; 803. Tilting arm; 804. Telescopic rod; 805. Linkage shaft; 806. Wave-making plate; 807. Central shaft; 808. Fixed threaded hole; 809. External threaded pipe; 810. Fixed cylinder; 811. Rubber diaphragm; 812. Elastic strip; 813. Sealing disc; 814. Water passage hole;

[0042] 9. Reflux mechanism; 901. Water inlet hole; 902. Insertion hole; 903. Circulation pipe; 904. Electronic flow meter; 905. Submersible pump. Detailed Implementation

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0045] like Figures 1-11 As shown, this application provides a power testing device for ship propulsion blades, including: a test pool 1, a support bridge 2 fixedly installed at the right end of the test pool 1, a positioning mechanism 3 located in the middle of the support bridge 2 fixedly installed on the support bridge 2, a test assembly 4 fixedly installed on the positioning mechanism 3, a power mechanism 5 fixedly installed on the test assembly 4, one end of the power mechanism 5 extending into the interior of the test pool 1 and fixedly installed on a fixed base 6, a propulsion impeller 7 detachably installed on the fixed base 6, and the positioning mechanism 3 can not only carry the propulsion impeller 7 in the horizontal plane The circular rotation also allows the impeller 7 to move back and forth in the vertical direction. A wave-making mechanism 8 is fixedly installed on the side of the supporting bridge 2, and a return flow mechanism 9 is fixedly installed inside the test pool 1. The power mechanism 5 drives the impeller 7 to rotate through the fixed base 6, thereby driving the water flow. The front of the impeller 7 is the inflow area, and the rear of the impeller 7 forms the wake. The test pool 1 consumes the kinetic energy of the wake, and the return flow mechanism 9 replenishes water to the inflow area to maintain the stability of the inflow area.

[0046] The test integrates a built-in thrust sensor and signal processing module 4, which can collect thrust data transmitted by the propulsion impeller 7 and transmit the data to the control cabinet 205 in real time.

[0047] Please see Figure 3 The test pool 1 includes an inner pool 101. Two arc-shaped walls 102 are joined together at the right end of the inner pool 101. A concave partition 103 is fixedly connected to the bottom surface of the inner cavity of the inner pool 101. Both ends of the concave partition 103 extend into the two arc-shaped walls 102. The end face of the concave partition 103 has a rounded chamfer 104. The arc-shaped walls 102 and the rounded chamfer 104 share a central axis. An arc-shaped channel 105 is formed between the inner surface of the arc-shaped wall 102 and the rounded chamfer 104. A test cavity 106 is formed inside the concave partition 103. Two reflux cavities 107 are formed between the outer surface of the concave partition 103 and the inner wall of the inner pool 101. The two reflux cavities 107 are respectively connected to the corresponding arc-shaped channels 105. The top of the inner pool 101... Two overflow openings 108 are provided on the left side of the inner pool 101. One overflow opening 108 spans the back and left end face of the inner pool 101, and the other overflow opening 108 spans the front and left end face of the inner pool 101. The two overflow openings 108 are respectively connected to the corresponding return cavity 107. A guide member 109 located at the left end is fixedly connected to the inner wall of the return cavity 107. An outer pool 110 is sleeved on the outside of the inner pool 101. The inner pool 101 is fixedly connected to the bottom surface of the inner cavity of the outer pool 110 and located at its right end. A fixed horizontal plate 111 located in the middle is fixedly installed on the top surface of the concave partition 103. A detector 112 is fixedly inserted into the middle of the fixed horizontal plate 111. The detector 112 monitors the liquid level inside the test cavity 106.

[0048] Please see Figure 3 and Figure 6 The supporting bridge 2 includes a first through hole 201 and a bridge panel 202. The first through hole 201 is opened on the front and rear sides of the outer pool 110 and located at its right end. The bridge panel 202 is mounted on the top surface of the inner pool 101, the concave partition 103, and the outer pool 110. Limiting plates 203 are fixedly connected to both ends of the bottom surface of the bridge panel 202. A second through hole 204 is opened on the limiting plate 203. A bolt is provided inside the second through hole 204. The bolt passes through the first through hole 201 and fixes the limiting plate 203 to the outer pool 110. A control cabinet 205 is fixedly installed at one end of the top surface of the bridge panel 202. The control cabinet 205 is electrically connected to all electrical components.

[0049] Please see Figure 6 , Figure 7 and Figure 8 The positioning mechanism 3 includes a through hole 301 and an insert ring 302. The through hole 301 is located at the center of the top surface of the bridge deck 202. The insert ring 302 is fixedly connected to the top surface of the bridge deck 202. The insert ring 302 and the through hole 301 share a central axis. A lifting bearing 303 is fixedly installed inside the insert ring 302. A worm gear motor 304 is installed inside the lifting bearing 303. The worm gear motor 304 is fixedly installed on the bottom surface of the bridge deck 202. The output shaft of the worm gear motor 304 passes through the through hole 301 and the lifting bearing 303 and is fixedly connected to a square cylinder 305. The square cylinder 305 is fixedly connected to the top surface of the lifting bearing 303.

[0050] The top of the square cylinder 305 is open, and a square cover plate 306 is bolted to the top surface of the square cylinder 305. A rectangular sliding hole 307 is opened on the side of the square cylinder 305, facing the left side of the bridge panel 202. A servo motor 308 is bolted to the bottom surface of the inner cavity of the square cylinder 305. A drive screw 309 is fixedly connected to the top of the output shaft of the servo motor 308. The top of the drive screw 309 is movably sleeved on the bottom surface of the square cover plate 306. A drive slider 310 is threadedly sleeved on the outside of the drive screw 309. The drive slider 310 is slidably inserted into the inside of the square cylinder 305. A linkage plate 311 is fixedly connected to the surface of the drive slider 310. The other end of the linkage plate 311 passes through the rectangular sliding hole 307 and is fixedly connected to the test integration 4.

[0051] Please see Figure 7 , Figure 8 and Figure 9The power mechanism 5 includes a power base 501, which is fixedly mounted on the surface of the test integration 4 away from the linkage plate 311. A power flat tube 502 is fixedly mounted on the bottom surface of the power base 501. The bottom end of the power flat tube 502 extends into the test chamber 106 and is fixedly connected to a power cylinder 503. A mounting hole 504 is opened on the end face of the power cylinder 503. A power motor 505 is bolted to the top surface of the power base 501. A power rod is fixedly connected to the bottom end of the output shaft of the power motor 505. 506. The bottom end of the power rod 506 passes through the power base 501 and the power flat tube 502 and extends into the power cylinder 503, where a drive bevel gear 507 is fixedly installed. A transmission rod 508 is movably inserted into the mounting hole 504. One end of the transmission rod 508 passes through the power cylinder 503, and a transmission bevel gear 509 located inside the power cylinder 503 is fixedly sleeved on the outside of the transmission rod 508. The transmission bevel gear 509 meshes with the drive bevel gear 507, and the other end of the transmission rod 508 is fixedly connected to the fixed base 6.

[0052] Please see Figure 9 The fixed base 6 includes a fixed base plate 601, which is fixedly connected to the end of the transmission rod 508. A fixed shaft 602 and a fixed protrusion 603 are fixedly connected to the other side of the fixed base plate 601. The fixed protrusion 603 is fixedly connected to the surface of the fixed shaft 602. An internal threaded hole 604 is provided on the end face of the fixed shaft 602. The transmission rod 508, the fixed base plate 601, the fixed shaft 602, and the internal threaded hole 604 share a common central axis. A threaded post 605 is inserted into the internal threaded hole 604 with a threaded fit. A rotating cap 606 is fixedly connected to the other end of the threaded post 605. A flow divider cone 607 is fixedly connected to the other end of the rotating cap 606. The propulsion impeller 7 is installed between the fixed base plate 601 and the rotating cap 606.

[0053] Please see Figure 9 The propulsion impeller 7 includes a mounting sleeve 701, which is sleeved on the outside of the fixed shaft 602. The mounting sleeve 701 is clamped between the fixed base plate 601 and the rotating cap 606. A positioning groove 702 is provided on the inner wall of the mounting sleeve 701. A fixing protrusion 603 is inserted into the positioning groove 702. Five blade bodies 703 are fixedly connected at equal intervals on the outer surface of the mounting sleeve 701.

[0054] Please see Figure 5 and Figure 6The wave-making mechanism 8 includes two sets of fixed wall panels 801, which are symmetrically arranged on the left side of the bridge panel 202. Each set has two fixed wall panels 801, which are fixedly connected to the left side of the bridge panel 202. A fixed shaft 802 is fixedly connected between the two fixed wall panels 801 in the same set. A flip arm 803 is rotatably sleeved on the fixed shaft 802. The other end of the flip arm 803 is inclined upward and fixedly connected to a telescopic rod 804. The other end of the telescopic rod 804 is movably inserted into a linkage shaft 805. A wave-making plate 806 is fixedly connected between the two linkage shafts 805. A central shaft 807 located at the bottom end of the wave-making plate 806 is fixedly connected to the side of the wave-making plate 806. The other end of the central shaft 807 is movably inserted into the inner wall of the concave partition 103. The wave-making plate 806 is movably inserted into the test chamber 106 and located at its left end.

[0055] When wave generation is required, the control cabinet 205 is used to set the frequency and length of the extension rod 804. When it is shortened, the extension rod 804 pulls the wave-generating plate 806 to flip to the right, forming a wave. The longer the length of the change, the larger the wave.

[0056] Please see Figure 10 and Figure 11 The wave-making plate 806 has multiple fixed threaded holes 808 at equal intervals. An external threaded tube 809 is inserted into the fixed threaded hole 808 with a threaded fit. The other end of the external threaded tube 809 is fixedly connected to a fixed cylinder 810. A rubber diaphragm 811 is filled inside the fixed cylinder 810. An elastic strip 812 is fixedly connected to the top surface of the rubber diaphragm 811. A sealing disc 813 is installed inside the fixed cylinder 810 with a threaded fit. The sealing disc 813 presses the rubber diaphragm 811 against the inner wall of the fixed cylinder 810 through the elastic strip 812. Multiple water passage holes 814 are opened on the sealing disc 813.

[0057] As the telescopic rod 804 pulls the wave-making plate 806 to flip to the right, the water presses against the rubber diaphragm 811, causing it to adhere to the inner wall of the fixed cylinder 810 and block the external threaded pipe 809, thus increasing the wave-making capacity. When extended, the telescopic rod 804 pulls the wave-making plate 806 to flip to the left. The water on the left side of the wave-making plate 806 exerts a pushing force on the rubber diaphragm 811, causing the rubber diaphragm 811 to tilt upwards, making the inner cavity of the external threaded pipe 809 and the inner cavity of the fixed cylinder 810 connected. The water on the left side of the wave-making plate 806 flows to the right side of the wave-making plate 806 through the external threaded pipe 809 and the fixed cylinder 810.

[0058] Please see Figure 3 and Figure 4The concave partition 103 is hollow. The reflux mechanism 9 includes multiple water replenishment holes 901 and a plug hole 902. The multiple water replenishment holes 901 are symmetrically opened on the front and rear surfaces of the inner side of the concave partition 103 and located at the left end of the test chamber 106. The water replenishment holes 901 communicate with the hollow cavity inside the concave partition 103. The plug hole 902 is opened on the left end face of the concave partition 103 and communicates with the hollow cavity inside the concave partition 103. A circulation pipe 903 is fixedly inserted into the plug hole 902. An electronic flow meter 904 is fixedly installed on the circulation pipe 903. The other end of the circulation pipe 903 is fixedly connected to a submersible pump 905. The submersible pump 905 is bolted to the bottom surface of the inner cavity of the outer pool 110.

[0059] The electronic flow meter 904 provides real-time feedback on the water replenishment volume to the control cabinet 205, forming a dual-parameter control with the liquid level data from the detector 112, further improving the accuracy of the water replenishment volume.

[0060] Working principle

[0061] First, control cabinet 205 controls servo motor 308 to run forward. Then, servo motor 308 drives drive screw 309 to rotate. Next, drive slider 310 moves upward under the action of the threaded engagement between it and drive screw 309. Then, drive slider 310 moves fixed base 6 upward through linkage plate 311, test integration 4, and power mechanism 5. Then, the position of fixed base 6 is higher than the position of bridge panel 202. Then, the distance between fixed base 6 and bridge panel 202 is adapted to the impeller 7. Then, control cabinet 205 controls servo motor 308 to stop. The position height of fixed base 6 is fixed by the threaded engagement between drive slider 310 and drive screw 309. Then, control cabinet 205 controls worm gear... The worm gear motor 304 runs in the forward direction, then the worm gear motor 304 drives the square cylinder 305 to rotate. The square cylinder 305 then drives the fixed base 6 to rotate horizontally via the drive slider 310, linkage plate 311, test integration 4, and power mechanism 5. When the square cylinder 305 has rotated 180 degrees, the fixed base 6 is suspended above the bridge panel 202. At this time, the control cabinet 205 controls the worm gear motor 304 to stop, and then the rotating cap 606 rotates in the forward direction relative to the fixed base plate 601. Next, the rotating cap 606 drives the threaded post 605 to rotate relative to the internal threaded hole 604. Then, the threaded post 605, under the action of the threaded engagement between itself and the internal threaded hole 604, retracts from the internal threaded hole 604. Then the threaded post 605... The entire assembly consisting of the rotating cap 606 and the diverter cone 607 is removed. Next, the tested impeller 7 is removed, followed by the impeller 7 to be tested. The fixed shaft 602 is inserted into the mounting sleeve 701, and the fixed protrusion 603 is inserted into the positioning groove 702 until the end face of the mounting sleeve 701 abuts against the surface of the fixed base plate 601. Then, the threaded post 605 is inserted into the internal threaded hole 604. The rotating cap 606 is then used to rotate the threaded post 605 in the reverse direction. The threaded post 605 then enters the internal threaded hole 604 under the action of the threaded engagement. The rotating cap 606 then presses the mounting sleeve 701 onto the surface of the fixed base plate 601, completing the fixation of the impeller 7. Finally, the control cabinet 205 is used to control the worm gear motor 304 to run in reverse. The process continues until the square cylinder 305 flips 180 degrees to reset. Then, the control cabinet 205 controls the servo motor 308 to run in reverse. The servo motor 308 drives the drive screw 309 to rotate in reverse, which in turn drives the slider 310 to move downwards. The slider 310 then drives the impeller 7 downwards via the linkage plate 311, test integration 4, power mechanism 5, and fixed base 6. Once the impeller 7 is submerged to the required depth, the control cabinet 205 activates the power motor 505. The power motor 505 then drives the transmission rod 508 to rotate via the power rod 506, the meshing of the drive bevel gear 507 and the transmission bevel gear 509, and finally, the transmission rod 508 drives the impeller 7 to rotate via the fixed base 6.Next, the impeller 7 drives the water inside the test chamber 106 to flow to the right. An inflow area is formed on the left side of the impeller 7, and a wake is formed on the right side. The water exerts a counter-thrust force on the impeller 7. Then, the impeller 7 applies pressure to the test integration 4 through the fixed base 6 and the power mechanism 5. The test integration 4 then sends the pressure data to the control cabinet 205 in real time. The control cabinet 205 records and analyzes the pressure data. Next, the wake flows inside the arc channel 105. The arc channel 105 then guides the wake, achieving a smooth change in the wake direction. The wake then enters the return chamber 107 and overflows from the overflow opening 108. Due to the guiding effect of the guide component 109, the wake does not generate turbulence inside the return chamber 107, allowing the wake to flow more smoothly. Finally, the overflowing wake flows into the water inside the outer pool 110. In the test chamber 106, the kinetic energy of the wake current is naturally dissipated in the water inside the outer pool 110. Then, the detector 112 monitors the liquid level in the inflow area in real time and sends the relevant data to the control cabinet 205. The control cabinet 205 then controls the operating power of the submersible pump 905 based on the liquid level data to maintain the liquid level within the set range. The submersible pump 905 draws water from the outer pool 110 and enters the hollow cavity inside the concave partition 103 through the circulation pipe 903, electronic flow meter 904, and insertion hole 902. The water inside the hollow cavity then replenishes the test chamber 106 through the water replenishment hole 901. Since the water replenishment holes 901 are symmetrically distributed on the front and back surfaces of the concave partition 103, the water replenishment holes 901 on the front and back surfaces counteract each other, offsetting the kinetic energy of the water and reducing the influence of the wake current on the test results, thus making the test data more reliable.

[0062] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary; within the framework of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

[0063] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A marine propulsion blade power testing apparatus comprising: The utility model provides a test pool (1), its characterized in be right end fixed mounting of test pool (1) has the bearing bridge (2), fixed mounting has the positioning mechanism (3) in the middle of bearing bridge (2), fixed mounting has test integration (4) on positioning mechanism (3), fixed mounting has power mechanism (5) on test integration (4), one end of power mechanism (5) extends to the inside of test pool (1) and fixed mounting has fixed pedestal (6), detachable mounting has the propulsion impeller (7) on fixed pedestal (6), positioning mechanism (3) not only can rotate with the propulsion impeller (7) in the horizontal plane circumferentially, also can move reciprocatingly with the propulsion impeller (7) in the vertical direction, the side fixed mounting of bearing bridge (2) has the wave mechanism (8), the inside fixed mounting of test pool (1) has the backflow mechanism (9), power mechanism (5) rotates with the propulsion impeller (7) through fixed pedestal (6), power mechanism (5) rotates with the propulsion impeller (7) through fixed pedestal (6), and then drive water flow, the front side of propulsion impeller (7) is inflow area, and the back side of propulsion impeller (7) forms the wake, and test pool (1) consumes the kinetic energy of wake, and the backflow mechanism (9) supplements water to inflow area, maintains the stability of inflow area; The positioning mechanism (3) includes through hole (301) and embedded ring (302), the through hole (301) is arranged at the middle position of the top surface of the bridge deck (202), the embedded ring (302) is fixedly connected to the top surface of the bridge deck (202), the embedded ring (302) shares the central axis with the through hole (301), the embedded ring (302) is fixedly embedded with the lifting bearing (303) inside, the worm gear motor (304) is arranged in the lifting bearing (303), the worm gear motor (304) is fixedly installed on the bottom surface of the bridge deck (202), the output shaft of the worm gear motor (304) passes through the through hole (301) and the lifting bearing (303) and is fixedly connected with the square barrel (305), and the square barrel (305) is fixedly connected to the top surface of the lifting bearing (303); The top end of the square barrel (305) is open, the square cover plate (306) is bolted to the top surface of the square barrel (305), the rectangular sliding hole (307) is arranged on the side surface of the square barrel (305), the rectangular sliding hole (307) faces the left side of the bridge deck (202), the servo motor (308) is bolted to the bottom surface of the inner cavity of the square barrel (305), the driving screw (309) is fixedly connected to the top end of the output shaft of the servo motor (308), the driving screw (309) is movably sleeved to the bottom surface of the square cover plate (306), the driving sliding block (310) is sleeved to the outside of the driving screw (309) in a threaded manner, the driving sliding block (310) is slidingly inserted into the square barrel (305), the linkage plate (311) is fixedly connected to the surface of the driving sliding block (310), and the other end of the linkage plate (311) passes through the rectangular sliding hole (307) and is fixedly connected with the test integration (4).

2. The boat propeller blade power testing device of claim 1, wherein, The test pool (1) includes an inner pool (101), two circular arc walls (102) are arranged at the right end of the inner pool (101) and are connected together, a concave partition (103) is fixedly connected to the bottom surface of the inner cavity of the inner pool (101), the two ends of the concave partition (103) extend into the two circular arc walls (102) respectively, the end surface of the concave partition (103) is provided with a circular arc chamfer (104), the circular arc wall (102) and the circular arc chamfer (104) share a central axis, the circular arc channel (105) is formed between the inner surface of the circular arc wall (102) and the circular arc chamfer (104), the test cavity (106) is formed in the inner side of the concave partition (103), the two return cavities (107) are formed between the outer side surface of the concave partition (103) and the inner wall of the inner pool (101), the two return cavities (107) are communicated with the corresponding circular arc channels (105) respectively, the two overflow openings (108) are arranged on the top surface of the inner pool (101) and are located at the left end of the inner pool (101), one overflow opening (108) spans the back surface and the left end surface of the inner pool (101), the other overflow opening (108) spans the front surface and the left end surface of the inner pool (101), the two overflow openings (108) are communicated with the corresponding return cavities (107) respectively, the guide member (109) is fixedly connected to the inner wall of the return cavity (107) and is located at the left end of the return cavity (107), the outer pool (110) is arranged outside the inner pool (101), the inner pool (101) is fixedly connected to the bottom surface of the inner cavity of the outer pool (110) and is located at the right end of the outer pool (110), the fixed horizontal plate (111) is fixedly installed on the top surface of the concave partition (103) and is located at the middle part of the concave partition (103), the probe (112) is fixedly inserted into the middle part of the fixed horizontal plate (111), and the probe (112) monitors the liquid level in the test cavity (106).

3. The boat propeller blade power testing apparatus of claim 1, wherein, The bearing bridge (2) includes the first perforation (201) and the bridge deck plate (202), the first perforation (201) is arranged on the front and back surfaces of the outer pool (110) and is located at the right end of the outer pool (110), the bridge deck plate (202) is arranged on the top surfaces of the inner pool (101), the concave partition (103) and the outer pool (110), the limit plates (203) are fixedly connected to the two end positions of the bottom surface of the bridge deck plate (202), the second perforation (204) is arranged on the limit plate (203), the bolt is arranged in the second perforation (204), the bolt passes through the first perforation (201) and fixes the limit plate (203) and the outer pool (110) together, and the control cabinet (205) is fixedly installed on one end of the top surface of the bridge deck plate (202).

4. The boat propeller blade power testing apparatus of claim 1, wherein, The power mechanism (5) includes a power base (501) fixedly installed on the surface of the test integration (4) away from the linkage small plate (311), the bottom surface of the power base (501) is fixedly installed with a power flat pipe (502), the bottom end of the power flat pipe (502) extends to the inside of the test cavity (106) and is fixedly connected with a power cylinder (503), the end surface of the power cylinder (503) is provided with a mounting small hole (504), the top surface of the power base (501) is bolted with a power motor (505), the bottom end of the output shaft of the power motor (505) is fixedly connected with a power long rod (506), the bottom end of the power long rod (506) penetrates through the power base (501), the power flat pipe (502) and extends to the inside of the power cylinder (503) and is fixedly installed with a driving bevel gear (507), a transmission rod (508) is movably inserted in the mounting small hole (504), one end of the transmission rod (508) penetrates through the power cylinder (503), the transmission rod (508) is fixedly sleeved with a transmission bevel gear (509) located in the inside of the power cylinder (503) outside, the transmission bevel gear (509) is engaged with the driving bevel gear (507), the other end of the transmission rod (508) is fixedly connected with the fixed base (6).

5. The marine propulsion blade power testing apparatus of claim 1, wherein, The fixed base (6) includes a fixed base plate (601) fixedly connected on the end of the transmission rod (508), the other surface of the fixed base plate (601) is fixedly connected with a fixed shaft (602) and a fixed convex strip (603), the fixed convex strip (603) is fixedly connected on the surface of the fixed shaft (602), the end surface of the fixed shaft (602) is provided with an internal thread hole (604), the transmission rod (508), the fixed base plate (601), the fixed shaft (602) and the internal thread hole (604) share a central axis, a threaded column (605) is inserted in the internal thread hole (604) in threaded cooperation, the other end of the threaded column (605) is fixedly connected with a rotating cap (606), the other end of the rotating cap (606) is fixedly connected with a shunt cone (607), the propeller (7) is installed between the fixed base plate (601) and the rotating cap (606).

6. The boat propeller blade power testing apparatus of claim 1, wherein, The propeller (7) includes an installation sleeve (701) sleeved outside the fixed shaft (602), the installation sleeve (701) is clamped between the fixed base plate (601) and the rotating cap (606), the inner wall of the installation sleeve (701) is provided with a positioning sliding groove (702), the fixed convex strip (603) is inserted in the inside of the positioning sliding groove (702), five blade bodies (703) are fixedly connected on the outer surface of the installation sleeve (701) at equal distances.

7. The marine propulsion blade power testing apparatus of claim 2, wherein, The wave making mechanism (8) comprises two groups of fixed wall plates (801), which are symmetrically arranged on the left side of the bridge deck (202), each group has two fixed wall plates (801), the fixed wall plates (801) are fixedly connected on the left side of the bridge deck (202), the two fixed wall plates (801) in the same group are fixedly connected with a fixed shaft body (802), the fixed shaft body (802) is rotatably sleeved with a turnover arm (803), the other end of the turnover arm (803) is obliquely upward and fixedly connected with an extension rod (804), the other end of the extension rod (804) is movably inserted with a linkage shaft body (805), the two linkage shaft bodies (805) are fixedly connected with a wave making plate (806), the side of the wave making plate (806) is fixedly connected with a central shaft (807) at the bottom end thereof, the other end of the central shaft (807) is movably inserted into the inner wall of the concave partition (103), and the wave making plate (806) is movably inserted into the test cavity (106) and located at the left end thereof.

8. The boat propeller blade power testing apparatus of claim 7, wherein, A plurality of fixed threaded holes (808) are equidistantly arranged on the wave making plate (806), an external threaded pipe (809) is inserted into the fixed threaded hole (808) in threaded cooperation, the other end of the external threaded pipe (809) is fixedly connected with a fixed cylinder (810), the fixed cylinder (810) is filled with a rubber diaphragm (811), the top surface of the rubber diaphragm (811) is fixedly connected with an elastic strip (812), and a sealing disc (813) is installed in the fixed cylinder (810) in threaded cooperation, the sealing disc (813) presses the rubber diaphragm (811) on the inner wall of the fixed cylinder (810) through the elastic strip (812), and a plurality of water holes (814) are formed in the sealing disc (813).

9. The marine propulsion blade power testing apparatus of claim 2, wherein, The concave partition (103) is hollow, the reflux mechanism (9) comprises a plurality of water supplement holes (901) and an insertion hole (902), the plurality of water supplement holes (901) are symmetrically arranged on the front and rear sides of the inner side of the concave partition (103) and located at the left end of the test cavity (106), the water supplement holes (901) are communicated with the hollow cavity in the concave partition (103), the insertion hole (902) is arranged on the left end surface of the concave partition (103) and communicated with the hollow cavity in the concave partition (103), the insertion hole (902) is fixedly inserted with a circulating pipe (903), the circulating pipe (903) is fixedly installed with an electronic flowmeter (904) on the pipeline, the other end of the circulating pipe (903) is fixedly communicated with a submersible pump (905), and the submersible pump (905) is bolted on the bottom surface of the inner cavity of the outer pool (110).

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