Propeller simulation tool and use method
By designing a simulated propeller fixture, the problems of large size and poor environmental adaptability of underwater vehicle horsepower test benches were solved. A test method with simple structure, easy to carry and install was provided, realizing efficient propulsion system performance evaluation in various environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-22
- Publication Date
- 2026-03-13
AI Technical Summary
Existing underwater vehicle horsepower test benches are bulky, immobile, have limited applicable environments, are complex to operate, and are unsuitable for on-site testing.
A simulated propeller fixture was designed, including a front propeller assembly and a rear propeller assembly. It is made of wood and uses standard connectors, and is connected to the tail shaft assembly of the aircraft via splines. It is suitable for rapid installation and testing in various environments.
A simple, portable, and easy-to-install testing method has been developed, which is suitable for humid and sea trial sites and can realistically simulate the load-bearing operation of the propulsion system, thus improving the convenience and accuracy of the test.
Smart Images
Figure CN121650827A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of underwater vehicle testing technology, and more specifically, to a tooling that can be used to simulate the propeller load state of an underwater vehicle, belonging to the category of propulsion system testing equipment. Background Technology
[0002] When an underwater vehicle is navigating underwater, its propeller converts the rotational power of the propulsion motor into thrust, propelling the vehicle forward at high speed. Existing underwater vehicles require horsepower testing before leaving the factory, especially testing under load (propeller load) conditions to verify the performance of their propulsion system. In practice, this testing is often conducted using a fixed horsepower test bench. However, traditional horsepower test benches have the following technical problems: Large size and immovable: The test bench needs to be connected to a power source and load device, and its overall structure is complex and difficult to move.
[0003] Limited applicable environment: The test bench can only be used in a dry workshop. A humid environment can easily lead to equipment failure and cannot adapt to the changing conditions at the sea trial site.
[0004] Complex operation and inconvenient debugging: The debugging process of the test equipment is complicated and requires the participation of professional personnel, and its support capability for emergency on-site testing is weak.
[0005] To address the aforementioned issues, there is an urgent need to develop a simple, portable, and suitable simulated propeller fixture for various field environments, enabling rapid installation and portable testing. Summary of the Invention
[0006] This invention provides a simulated propeller fixture and its usage method to solve the problems of existing fixed horsepower test benches being bulky, immobile, and limited in applicable environments.
[0007] To achieve the above objectives, in one aspect, the present invention provides a simulated propeller fixture, which includes: a front propeller assembly and a rear propeller assembly; the front propeller assembly includes: a front wooden propeller body, a front wooden propeller hub, and a front propeller support ring; the front wooden propeller hub is assembled into the inner hole of the front wooden propeller body and fixedly connected; the front propeller support ring is assembled into the inner hole of the front wooden propeller hub; the rear propeller assembly includes: a rear wooden propeller body, a rear wooden propeller hub, a rear wooden propeller blade, and a rear propeller support ring; the rear wooden propeller hub is assembled into the inner hole of the rear wooden propeller body and fixedly connected; the rear propeller support ring is assembled into the inner hole of the rear wooden propeller hub; the rear wooden propeller blade is fixedly connected to both ends of the rear wooden propeller body; the front propeller assembly and the rear propeller assembly are respectively connected to the large end face and the small end face of the tail shaft assembly of the aircraft via splines, and are respectively axially limited and fixed by anti-reverse rings and tail plugs.
[0008] Optionally, there are two rear wooden paddle blades, which are respectively fixedly connected to both ends of the rear wooden paddle body by screws and nuts.
[0009] Optionally, a washer is provided between the nut and the rear wood blade and the rear wood body.
[0010] Optionally, one of the rear wooden blades is fixedly connected to the top surface of one end of the rear wooden paddle body; the other rear wooden blade is fixedly connected to the bottom surface of the other end of the rear wooden paddle body.
[0011] Optionally, the front paddle hub is fixedly connected to the inner hole of the front paddle body by screws and nuts; the rear paddle hub is fixedly connected to the inner hole of the rear paddle body by screws and nuts.
[0012] Optionally, a washer is provided between the nut and the front wood paddle hub and the front wood paddle body; a washer is provided between the nut and the rear wood paddle hub and the rear wood paddle body.
[0013] Optionally, the front propeller assembly and the rear propeller assembly are made of wood.
[0014] Optionally, the rear propeller support ring is provided with a buffer pad layer.
[0015] On the other hand, the present invention provides a method for using the above-mentioned simulated propeller fixture, the method comprising: S1, disassembling the original front propeller and rear propeller of the aircraft; S2, installing the front propeller assembly to the large end face spline of the tail shaft assembly of the aircraft, and limiting it by a backstop ring; S3, installing the rear propeller assembly to the small end face spline of the tail shaft assembly of the aircraft, and limiting it by a tail plug; S4, powering on the aircraft and running it, and judging the running stability, structural vibration or abnormal noise of the aircraft under load by observing the running status of the simulated propeller fixture.
[0016] Optionally, S1 includes: sequentially removing the tail plug, rear propeller, anti-reverse ring, and front propeller from the spline of the tail shaft assembly of the aircraft.
[0017] The beneficial effects of this invention are: This invention provides a simulated propeller fixture and its usage method, wherein the fixture... Simple structure and easy installation: The entire structure consists of a wooden propeller body and standard connectors, making assembly convenient and compatible with universal tail shaft interfaces; no fixed test bench required, highly adaptable: It can be directly installed on the tail shaft assembly of a vehicle without relying on additional test equipment or power systems. Suitable for various environments: Particularly suitable for humid, temporary, and sea trial environments, and not subject to electrical safety restrictions. Realistic load simulation and good testing results: The long propeller design and rear blade structure can effectively simulate the propulsion system's loaded operation, aiding in the assessment of performance such as operational stability and noise levels. Portable and reusable: Small in size and lightweight, easy to carry and reusable. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of a simulated propeller tooling provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the front propeller assembly provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the rear propeller assembly provided in an embodiment of the present invention; Figure 4 This is a flowchart illustrating a method for using a simulated propeller fixture provided in an embodiment of the present invention.
[0019] Symbol explanation: Front propeller assembly-1, rear propeller assembly-2, anti-reverse ring-3, tail plug-4, tail shaft assembly-5, screw-6, nut-7, front wooden propeller body-11, front wooden propeller hub-12, front propeller support ring-13, rear wooden propeller body-21, rear wooden propeller hub-22, rear wooden propeller blade-23, rear propeller support ring-24. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.
[0021] Figure 1 This is a schematic diagram of a simulated propeller fixture provided in an embodiment of the present invention; as shown below. Figure 1 As shown, the tooling includes: Front propeller assembly 1 and rear propeller assembly 2; Specifically, the front propeller assembly 1 and the rear propeller assembly 2 are made of wood with a density of 0.7~0.9 g / cm³. 3 The total weight of the front propeller assembly 1 and the rear propeller assembly 2 shall not exceed 5 kg.
[0022] Figure 2 This is a schematic diagram of the front propeller assembly 1 provided in an embodiment of the present invention; as shown... Figure 2 As shown, the front propeller assembly 1 includes: a front wood propeller body 11, a front wood propeller hub 12, and a front propeller support ring 13; the front wood propeller hub 12 is fitted into the inner hole of the front wood propeller body 11 and fixedly connected; the front propeller support ring 13 is fitted into the inner hole of the front wood propeller hub 12. The front paddle body 11 is a rectangular column structure with long strips at both ends and a plate-like structure with a hexagonal outer contour in the middle. It has a through-hole in the middle for assembling the front paddle hub 12. In this application, the length of the front paddle body 11 is 800mm and the inner hole is a rectangular structure. The front paddle hub 12 and the inner hole of the front paddle body 11 are fixedly connected by screws 6 and nuts 7. A washer is provided between the nut 7 and the front paddle hub 12 and the front paddle body 11.
[0023] In this application, multiple pairs of screws 6 and nuts 7 are provided, and the screws 6 and nuts 7 are made of stainless steel to prevent corrosion in water.
[0024] The front paddle hub 12 is fitted with a front paddle support ring 13 in its inner hole. The front paddle support ring 13 is a ring structure.
[0025] Figure 3 This is a schematic diagram of the structure of the rear propeller assembly 2 provided in an embodiment of the present invention; as shown... Figure 3 As shown, the rear propeller assembly 2 includes: a rear wood propeller body 21, a rear wood propeller hub 22, a rear wood propeller blade 23, and a rear propeller support ring 24; the rear wood propeller hub 22 is fitted into the inner hole of the rear wood propeller body 21 and fixedly connected; the rear propeller support ring 24 is fitted into the inner hole of the rear wood propeller hub 22; the rear wood propeller blade 23 is fixedly connected to both ends of the rear wood propeller body 21. The front propeller assembly 1 and the rear propeller assembly 2 are connected to the large end face and the small end face of the tail shaft assembly 5 of the aircraft by splines, respectively, and are axially limited and fixed by anti-reverse ring 3 and tail screw plug 4.
[0026] The rear paddle body 21 is a rectangular column structure with long strips at both ends and a plate-like structure with a hexagonal outer contour in the middle. It has a through-hole in the middle for assembling the rear paddle hub 22. In this application, the inner hole is a rectangular structure. The rear paddle hub 22 and the inner hole of the rear paddle body 21 are fixedly connected by screws 6 and nuts 7. A washer is provided between the nut 7 and the rear paddle hub 22 and the rear paddle body 21.
[0027] In this application, multiple pairs of screws 6 and nuts 7 are provided, and the screws 6 and nuts 7 are made of stainless steel to prevent corrosion in water.
[0028] In an optional embodiment, two rear paddle blades 23 are provided, and the two rear paddle blades 23 are respectively fixedly connected to both ends (i.e., the elongated rectangular column structure) of the rear paddle body 21 by screws 6 and nuts 7. A washer is provided between the nut 7 and the rear paddle blade 23 and the rear paddle body 21. One rear paddle blade 23 is fixedly connected to the top surface of one end of the rear paddle body 21; the other rear paddle blade 23 is fixedly connected to the bottom surface of the other end of the rear paddle body 21.
[0029] The rear propeller hub 22 is fitted with a rear propeller support ring 24 in its inner hole. The rear propeller support ring 24 has an annular structure. The rear propeller support ring 24 is provided with a buffer pad to reduce the impact caused by the high-speed rotation of the propeller blade.
[0030] Figure 4 This is a flowchart illustrating a method for using a simulated propeller fixture according to an embodiment of the present invention; as shown below. Figure 4 As shown, the method includes: S1. Remove the original front and rear propellers of the aircraft; Specifically, S1 includes: Remove the tail plug 4, rear propeller, anti-reverse ring 3, and front propeller from the spline of the tail shaft assembly 5 of the aircraft in sequence.
[0031] S2. Install the front propeller assembly 1 onto the large end face spline of the tail shaft assembly 5 of the aircraft, and limit it by the anti-reverse ring 3. S3. Install the rear propeller assembly 2 onto the small end face spline of the tail shaft assembly 5 of the aircraft, and limit it by the tail screw plug 4. S4. The aircraft is powered on and running. By observing the operating status of the simulated propeller fixture, the aircraft's running stability, structural vibration, or abnormal noise under load is judged.
[0032] Specifically, a vibration sensor can be installed on the rear wooden paddle body 21 to record the amplitude, and a sound level meter can be fixed on the rear wooden paddle body 21 to record the noise level in decibels. Start the vehicle's motor and gradually increase the speed to the rated value (e.g., 1200 rpm), and observe the tooling vibration amplitude and noise level in decibels.
[0033] Taking a certain type of unmanned underwater vehicle as an example, this simulated propeller fixture was used for on-site sea trial testing: Test environment: seawater temperature 15℃, salinity 3.5%, water depth 5m.
[0034] Installation time: Can be completed within 5 minutes by a single person; Test results: The front and rear propeller assemblies 2 can be observed to rotate under load. The tooling operates smoothly with a maximum vibration amplitude of ≤0.5mm and a noise level of ≤65dB, successfully verifying the reliability of the propulsion system under load.
[0035] Cost and maintenance: Once invested, it can be used multiple times without the need for power supply or peripheral support.
[0036] The beneficial effects of this invention are: This invention provides a simulated propeller fixture and its usage method, wherein the fixture... Simple structure and easy installation: The entire structure consists of a wooden propeller body and standard connectors, making assembly convenient and compatible with universal tail shaft interfaces; no fixed test bench required, highly adaptable: It can be directly installed on the tail shaft assembly 5 of the aircraft, without relying on additional test equipment or power systems. Suitable for various environments: Particularly suitable for humid, temporary, and sea trial environments, and not subject to electrical safety restrictions. Realistic load simulation and good test results: The long propeller design and rear blade structure can effectively simulate the propulsion system's loaded operation state, which helps in judging performance such as operational stability and noise levels. Portable and reusable: Small in size and lightweight, easy to carry and reusable.
[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A simulated propeller fixture, characterized in that, include: Front propeller assembly and rear propeller assembly; The front propeller assembly includes: a front wood propeller body, a front wood propeller hub, and a front propeller support ring; the front wood propeller hub is fitted into the inner hole of the front wood propeller body and fixedly connected; the front propeller support ring is fitted into the inner hole of the front wood propeller hub. The rear propeller assembly includes: a rear wood propeller body, a rear wood propeller hub, a rear wood propeller blade, and a rear propeller support ring; the rear wood propeller hub is fitted into the inner hole of the rear wood propeller body and fixedly connected; the rear propeller support ring is fitted into the inner hole of the rear wood propeller hub; the rear wood propeller blade is fixedly connected to both ends of the rear wood propeller body. The front propeller assembly and the rear propeller assembly are connected to the large end face and the small end face of the tail shaft assembly of the aircraft by splines, respectively, and are axially limited and fixed by anti-reverse rings and tail plugs.
2. The tooling according to claim 1, characterized in that: The rear wooden paddle is provided in two parts, and the two rear wooden paddles are respectively fixedly connected to both ends of the rear wooden paddle body by screws and nuts.
3. The tooling according to claim 2, characterized in that: A washer is provided between the nut and the rear wood blade and the rear wood blade.
4. The tooling according to claim 2, characterized in that: One of the rear wooden blades is fixedly connected to the top surface of one end of the rear wooden paddle body; the other rear wooden blade is fixedly connected to the bottom surface of the other end of the rear wooden paddle body.
5. The tooling according to claim 1, characterized in that: The front wooden paddle hub and the inner hole of the front wooden paddle body are fixedly connected by screws and nuts; The rear paddle hub and the inner hole of the rear paddle body are fixedly connected by screws and nuts.
6. The tooling according to claim 5, characterized in that: A washer is provided between the nut and the front wood paddle hub and the front wood paddle body; A washer is provided between the nut and the rear wood paddle hub and the rear wood paddle body.
7. The tooling according to claim 1, characterized in that: The front and rear propeller assemblies are made of wood.
8. The tooling according to claim 1, characterized in that: The rear propeller support ring is provided with a buffer pad layer.
9. A method of using the simulated propeller fixture according to any one of claims 1-8, characterized in that, include: S1. Remove the original front and rear propellers of the aircraft; S2. Install the front propeller assembly onto the large end face spline of the tail shaft assembly of the aircraft and limit it with the anti-reverse ring. S3. Install the rear propeller assembly onto the small end face spline of the tail shaft assembly of the aircraft and limit it with the tail screw plug; S4. The aircraft is powered on and running. By observing the operating status of the simulated propeller fixture, the aircraft's running stability, structural vibration, or abnormal noise under load is judged.
10. The method according to claim 9, characterized in that, S1 includes: Remove the tail plug, rear propeller, anti-reverse ring, and front propeller from the spline of the tail shaft assembly in sequence.