Multifunctional propeller static balance test device

Abstract

The utility model relates to the technical field of multifunctional propeller static balance test devices, and provides a multifunctional propeller static balance test device which can not only solve the common propeller static balance test, but also solve the static balance test of a novel propeller with a flow guide cap. Comprising a common base, and a rotating supporting mechanism and a bearing assembly used for supporting a rotating shaft assembly are arranged on the common base; the rotating supporting mechanism comprises a rotating shaft, a centering fixing structure used for installing a conventional propeller is arranged in the middle of the rotating shaft, and a positioning structure used for fixing the propeller with a flow guide cap is arranged at one end of the rotating shaft.

Description

Technical Field

[0001] This utility model relates to the technical field of multifunctional propeller static balance test device, specifically, to a multifunctional propeller static balance test device. Background Technology

[0002] As the core component of ship propulsion, the propeller converts the power generated by the ship's main engine into the propulsion for forward (or backward) movement. Propellers are characterized by their simple structure, high efficiency, and reliable operation, making them the most widely used propulsion device in ships today. Newly manufactured or repaired propellers generally require a static balancing test to eliminate the influence of unbalanced centrifugal forces on the rotating shaft system. Currently, the horizontal static balancing test method is more common, as it features simple structure, low cost, and high reliability.

[0003] With the increasing number of energy-efficient ships and the continuous optimization and development of Z-type electric propellers, more and more new propellers with integrated flow deflectors have emerged. Because the flow deflector and propeller are integrated into a single design, the propeller only has a large end face connecting flange, making it impossible to perform static balance tests using the traditional horizontal static balance test method. Therefore, it is necessary to outsource the measurement using electronic measurement methods or vertical static balance test methods, but this has drawbacks such as high transportation costs, long timeframes, and uncontrollable cycles. Utility Model Content

[0004] This invention proposes a multifunctional propeller static balance test device, which can solve both common propeller static balance tests and static balance tests of new propellers with built-in flow deflectors.

[0005] The technical solution of this utility model is as follows:

[0006] A multifunctional propeller static balance test device includes a common base, on which a rotating support mechanism and a bearing assembly for supporting a rotating shaft assembly are provided;

[0007] The rotating support mechanism includes a rotating shaft, with a centering and fixing structure in the middle of the rotating shaft for installing a conventional propeller, and a positioning structure at one end of the rotating shaft for fixing a propeller with a built-in guide cap.

[0008] Furthermore, the positioning structure includes a centering fixing flange, an extended journal section, a second lock nut, and a pressure plate;

[0009] The extended journal section is located at one end of the rotating shaft and is integrally formed with the rotating shaft. The centering and fixing flange is sleeved on the extended journal section. The second lock nut is located on one side of the centering and fixing flange and abuts against the end face of the centering and fixing flange. The pressure plate abuts against the end of the second lock nut facing away from the centering and fixing flange and is fixed to the rotating shaft by locking screws.

[0010] Further, the centering fixed flange is fixedly connected to the extended journal segment through a round head key.

[0011] Further, the centering fixed structure includes a neutral gear position segment located in the middle of the rotating shaft. Two trapezoidal thread segments for adjusting the support opening length are machined on both sides of the rotating shaft at the neutral gear position segment;

[0012] A centering flange assembly for fixing a conventional propeller is provided on the trapezoidal thread segment.

[0013] Further, the centering flange assembly includes a first lock nut, a copper sleeve seat, and a transition centering flange;

[0014] The first lock nut is located on the side of the transition centering flange facing away from the neutral gear position segment. The copper sleeve seat is sleeved on the trapezoidal thread segment, and the transition centering flange is sleeved on the copper sleeve seat.

[0015] Further, the bearing assembly includes at least two base pads mounted on a common base, a bearing housing mounted on the base pads, and a rolling bearing mounted in the bearing housing;

[0016] Two journal positions are machined on the rotating shaft. The two journal segments are respectively located on both sides of the centering fixed structure, and the two journal positions are respectively connected to two rolling bearings.

[0017] Further, the common base includes a cross-shaped base composed of longitudinal H-shaped steel and transverse H-shaped steel. Support towers are provided on both sides of the cross-shaped base;

[0018] The cross-section of the support tower is an isosceles trapezoid structure.

[0019] Further, a forklift slot with a "mouth" - shaped structure is provided in the cross-shaped base.

[0020] Further, lifting lug threaded holes are provided on both segments of the rotating shaft.

[0021] The beneficial effects of the present utility model are as follows:

[0022] The present utility model is an innovation based on the original static balance test tooling for propellers, breaking the limitations of the original static balance test tooling, improving the scope of use and the use efficiency of the static balance test tooling for propellers, reducing the time cost and expenses for transporting new propellers, with convenient operation of the device, strong versatility, high use efficiency, and wide use scope. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following further elaborates on the present utility model in conjunction with the drawings and specific embodiments.

[0024] Figure 1 It is a structural schematic diagram of this embodiment;

[0025] Figure 2 This is a side view of this embodiment;

[0026] Figure 3 This is an assembly drawing for a routine propeller static balancing test.

[0027] Figure 4 This is an assembly diagram for the static balance test of a new type of propeller with a built-in flow deflector.

[0028] Figure 5 This is a partial schematic diagram of the common base in this embodiment;

[0029] Figure 6 This is an exploded view of the rotating support mechanism in this embodiment;

[0030] Figure 7 This is a schematic diagram of the bearing assembly in this embodiment.

[0031] In the diagram: 1. Common base; 11. Longitudinal H-beam; 12. Transverse H-beam; 13. Support tower; 14. Forklift slot; 15. Central transverse support column; 16. Top panel; 2. Rotating support mechanism; 21. Rotating shaft; 221. Centering fixed flange; 222. Extended journal section; 223. Second lock nut; 224. Pressure plate; 225. Round head key; 231. Neutral section; 232. Trapezoidal thread section; 233. First lock nut; 234. Copper sleeve thread seat; 235. Transition centering flange; 24. Journal position; 25. Lifting lug threaded hole; 3. Bearing assembly; 31. Base pad; 32. Bearing seat; 33. Rolling bearing; 4. Axial limit sleeve; 5. Centering boss. Detailed Implementation

[0032] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0033] like Figure 1-7 As shown, a multifunctional propeller static balance test device mainly includes a common base 1, a rotary support mechanism 2 set on the common base 1, and a bearing assembly 3 for supporting the rotary shaft 21 assembly.

[0034] In this embodiment, the main structure of the rotating support mechanism 2 is a rotating shaft 21. The rotating shaft 21 has a centering and fixing structure in the middle for mounting a conventional propeller, and a positioning structure at one end for fixing a propeller with a built-in deflector cap. This makes the solution highly versatile and dual-purpose, capable of performing static balance tests on both conventional propellers and novel propellers with built-in deflector caps.

[0035] Specifically, the positioning structure includes, but is not limited to, a detachable centering flange 221 (machined from thick steel plate), an extended journal section 222, a second lock nut 223, and a pressure plate 224. The extended journal section 222 is located at one end of the rotating shaft 21 and is integrally formed with the rotating shaft 21. The centering flange 221 is fitted onto the extended journal section 222 and transition-fits with it, and is then fixedly connected to the extended journal section 222 via a round-head key 225, resulting in a compact and reliable structure. A centering boss 5 is machined on the outer side of the centering flange 221 for mating with the centering hole on the end face of the new propeller with its own guide cap, with a mating clearance of 0~+0.05mm. Bolt holes are also provided on the outer side of the centering flange 221 for mating with the threaded holes on the end face of the new propeller. By installing fixing bolts, the new propeller is fixed to the centering flange 221.

[0036] The second lock nut 223 is located on one side of the centering and fixing flange 221 and abuts against the end face of the centering and fixing flange 221. The pressure plate 224 abuts against the end of the second lock nut 223 facing away from the centering and fixing flange 221 and is fixed to the rotating shaft 21 by the locking screw. During assembly, after installing the centering and fixing flange 221 onto the rotating shaft 21, first tighten the second lock nut 223, then install the pressure plate 224, and finally tighten the locking screw.

[0037] The centering and fixing structure in this embodiment includes a neutral section 231 located in the middle of the rotating shaft 21. Two trapezoidal threaded sections 232 for adjusting the support opening length are machined on both sides of the neutral section 231 of the rotating shaft 21.

[0038] The trapezoidal threaded section 232 is equipped with a centering flange assembly for fixing a conventional propeller.

[0039] The centering flange assembly includes a first lock nut 233, a copper sleeve seat 234, and a transition centering flange 235 (machined from thick steel plate with a centering boss 5, which mates with the inner holes on the sides of the large and small ends of a conventional propeller, with a mating clearance of 0~+0.05mm). The first lock nut 233 is used to position and fix the transition centering flange 235. The two copper sleeve seats 234 support one transition centering flange 235 respectively. The mating clearance between the outer circle of the copper sleeve seat 234 and the inner hole of the transition centering flange 235 is 0.15~0.20mm.

[0040] Specifically, the first lock nut 233 is located on one side of the transition centering flange 235 facing away from the neutral gear position section 231. The copper sleeve tooth seat 234 is sleeved on the trapezoidal thread section 232, and the transition centering flange 235 is sleeved on the copper sleeve tooth seat 234. After tightening the transition centering flange 235 and the copper sleeve tooth seat 234 with the first lock nuts 233 at both ends, the weight of the traditional propeller is transmitted to the copper sleeve tooth seat 234 through the centering flange, and the copper sleeve tooth seat 234 is then transmitted to the rotating shaft 21, and finally transmitted to the common base 1 assembly by the bearing seats 32 on both sides. By adjusting the length of the support opening, the length requirements of conventional propeller hubs with different diameters and weights can be adapted, thereby improving the versatility of the device.

[0041] The bearing assembly 3 in this embodiment includes at least two base pads 31 mounted on the common base 1, bearing seats 32 mounted on the base pads 31, and rolling bearings 33 mounted on the bearing seats 32. Two shaft neck positions 24 are machined on the rotating shaft 21, and the two shaft diameter sections are respectively located on both sides of the centering and fixing structure, and the two shaft neck positions 24 are respectively connected to the two rolling bearings 33. The base pads 31 are drilled with threaded holes, and the base pads 31 are connected to the threaded holes through fasteners and then fixed on the base pads 31. The bearing seat 32 (which can be a two-roller rolling bearing seat 32) can adjust its own horizontal height by adjusting the thickness of the base pad 31 to ensure the horizontal state of the rotating shaft 21 and improve the test accuracy.

[0042] The common base 1 in this embodiment includes a cross-shaped base formed by assembling and welding longitudinal H-beams 11 and transverse H-beams 12. Support towers 13 are provided on both sides of the cross-shaped base, and the cross-section of the support tower 13 is an isosceles trapezoid structure. The structure of the support tower 13 includes diagonal braces, columns, a middle transverse support column 15, and a top panel 16. Reinforcement plates are welded at the connection between the top panel 16 and the support tower 13, and inner reinforcement plates, outer reinforcement plates, inter-support tower reinforcement plates, and bottom longitudinal support reinforcement plates are welded at the connection between the cross-shaped base and the support tower 13.

[0043] A forklift slot 14 with a "mouth" - shaped structure formed by splicing and welding channel steels is welded to the cross-shaped base to facilitate the transfer of the device by forklift. A ladder made of square steel bent is also welded on the side slope of the support tower 13 to facilitate personnel to climb up and down to the top of the support tower 13.

[0044] In addition, in this embodiment, lifting lug threaded holes 25 are opened at both ends of the rotating shaft 21 to facilitate the lifting of the rotating shaft 21 and the propeller.

[0045] The usage method of this embodiment is as follows:

[0046] When performing a static balance test on a conventional propeller:

[0047] 1. First, place the propeller flat on the frame. According to the length of the propeller hub, adjust the distance between the outer end faces of the two copper sleeve seats 234 on the rotating shaft 21 to be approximately equal to the length of the hub, and tighten the first lock nut 233 at the top.

[0048] 2. Install the transition centering flange 235 at the upper end of the propeller, insert the rotating shaft 21, and the first lock nut 233 just presses on the end face of the transition centering flange 235 and the copper sleeve seat 234.

[0049] 3. Install the transition centering flange 235 at the lower end of the propeller. If necessary, adjust the axial position of the copper sleeve seat 234. Install the first lock nut 233 of the transition centering flange 235 at the lower part of the rotating shaft 21 and the copper sleeve seat 234. Tighten with a wrench so that the two transition centering flanges 235 are respectively attached to the two end faces of the propeller hub.

[0050] 4. Install the bearing seats 32 and rolling bearings 33 at both ends of the rotating shaft 21 respectively, and temporarily fix them on the rotating shaft 21;

[0051] 5. Install and tighten the heavy-duty lifting lugs on both sides of the rotating shaft 21 to the specified torque;

[0052] 6. Use shackles to attach the lifting lugs on the upper side of the rotating shaft 21 to the crane hook and wire rope, and lift the crane to lift the propeller out of the tooling table as a whole;

[0053] 7. Use shackles to attach the lifting lugs on the lower side of the rotating shaft 21 to the hook and wire rope of another crane, and use the two cranes to slowly turn the propeller to an upright position.

[0054] 8. Hoist the rotating shaft 21 assembly and the propeller together onto the common base 1 assembly, install and fix the bearing seat 32, and adjust the rotating shaft 21 to a horizontal state;

[0055] 9. After removing the heavy lifting lug screws on both sides of the rotating shaft 21, install the axial limiting sleeve 4 on the limiting side, and install the pressure plate 224 and locking screws.

[0056] 10. At this point, manually rotating the propeller will allow for a static balance test to be performed on a conventional propeller.

[0057] When conducting static balance tests on a new type of propeller with integrated deflector caps:

[0058] 1. First, mount the bearing housing 32 and the rolling bearing 33 onto the journal on the cantilever side of the rotating shaft 21. After installing the centering and fixing flange 221 onto the rotating shaft 21, tighten the second lock nut 223, install the pressure plate 224, and tighten the locking screws.

[0059] 2. Based on the weight and center of gravity of the new propeller, and the weight and center of gravity of the propeller static balancing device, calculate the minimum required counterweight weight and center of gravity position.

[0060] 3. Place the counterweight, which is 1.5 times the calculated counterweight, at the counterweight position designed for the static balance device;

[0061] 4. Use a crane to lift the new propeller vertically, and use fixing bolts to symmetrically and diagonally fix the rotating shaft 21 and the centering fixing flange 221 to the new propeller;

[0062] 5. After installing the bearing housing 32 and rolling bearing 33 on the limiting side of the rotating shaft 21, hoist the rotating shaft 21 assembly and the propeller as a whole onto the common base 1 assembly, install and fix the bearing housing 32, and adjust the rotating shaft 21 to a horizontal state.

[0063] 6. After removing the heavy lifting lug screws on the rotating shaft 21, install the axial limiting sleeve 4 on the limiting side, and install the pressure plate 224 and locking screws.

[0064] 7. At this point, manually rotating the propeller will allow for a static balance test to be performed on the new propeller.

[0065] At this point, the perpendicularity and concentricity between the new propeller and the rotating shaft 21 can meet the requirements. Then, the bearing housing 32 and the rolling bearing 33 are installed on the limiting side of the rotating shaft 21, and the rotating shaft 21 and the new propeller are hoisted together onto the common base 1 assembly for installation, which can meet the working requirements of the static balance test of the new propeller.

[0066] This embodiment uses readily available materials, is simple to manufacture, and saves time and effort during installation. It not only saves storage space for the static balance testing device but also reduces outsourcing and docking costs, thus improving operational efficiency.

[0067] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A multifunctional propeller static balancing test device, comprising a common base (1), characterized in that, A rotating support mechanism (2) and a bearing assembly (3) for supporting the rotating shaft (21) assembly are provided on the common base (1). The rotating support mechanism (2) includes a rotating shaft (21). A centering and fixing structure for installing a conventional propeller is provided in the middle of the rotating shaft (21), and a positioning structure for fixing a propeller with a built-in fairing is provided at one end of the rotating shaft (21).

2. The multifunctional propeller static balance test device as described in claim 1, characterized in that, The positioning structure includes a centering and fixing flange (221), an extended journal section (222), a second lock nut (223) and a pressing plate (224). The extended journal section (222) is located at one end of the rotating shaft (21) and is integrally formed with the rotating shaft (21). The centering and fixing flange (221) is sleeved on the extended journal section (222). The second lock nut (223) is located on one side of the centering and fixing flange (221) and abuts against the end face of the centering and fixing flange (221). The pressing plate (224) abuts against one end of the second lock nut (223) facing away from the centering and fixing flange (221) and is fixed to the rotating shaft (21) through a locking screw.

3. The multifunctional propeller static balance test device as described in claim 2, characterized in that, The centering and fixing flange (221) is fixedly connected to the extended journal section (222) through a round head key (225).

4. The multifunctional propeller static balance test device as described in claim 1, 2, or 3, characterized in that, The centering and fixing structure includes a neutral gear section (231) in the middle of the rotating shaft (21). Two trapezoidal thread sections (232) for adjusting the support opening length are machined on both sides of the rotating shaft (21) at the neutral gear section (231). A centering flange assembly for fixing a conventional propeller is provided on the trapezoidal thread section (232).

5. The multifunctional propeller static balancing test device as described in claim 4, characterized in that, The centering flange assembly includes a first lock nut (233), a copper sleeve tooth seat (234) and a transition centering flange (235). The first lock nut (233) is located on one side of the transition centering flange (235) facing away from the neutral gear section (231). The copper sleeve tooth seat (234) is sleeved on the trapezoidal thread section (232), and the transition centering flange (235) is sleeved on the copper sleeve tooth seat (234).

6. The multifunctional propeller static balance test device as described in claim 1 or 2, characterized in that, The bearing assembly (3) includes at least two base pads (31) installed on the common base (1), a bearing housing (32) installed on the base pads (31), and a rolling bearing (33) installed in the bearing housing (32). Two journal positions (24) are machined on the rotating shaft (21). The two journal diameter sections are respectively located on both sides of the centering and fixing structure, and the two journal positions (24) are respectively connected to two rolling bearings (33).

7. The multifunctional propeller static balance test device as described in claim 1 or 2, characterized in that, The common base (1) includes a cross-shaped base composed of a longitudinal H-beam (11) and a transverse H-beam (12). Support towers (13) are provided on both sides of the cross-shaped base. The cross-section of the support tower (13) is an isosceles trapezoid structure.

8. The multifunctional propeller static balance test device as described in claim 7, characterized in that, A forklift slot (14) with a "mouth" - shaped structure is provided in the cross-shaped base.

9. The multifunctional propeller static balancing test device as described in claim 1 or 2, characterized in that, Lifting lug threaded holes (25) are provided at both ends of the rotating shaft (21).

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