High-ice-grade high-power propeller hub loading control system

Abstract

The invention relates to a high-ice-grade high-power propeller hub loading control system which comprises an electric control system, a hydraulic system and a loading oil cylinder. The electric control system is electrically connected with the hydraulic system and the loading oil cylinder and is used for controlling the action of the loading oil cylinder and loading parameters and collecting feedback signals; the hydraulic system is mechanically connected with the propeller hub through the loading oil cylinder and is used for applying a simulated high-ice-grade ice load to the propeller hub; the electric control system, the hydraulic system and the loading oil cylinder cooperate to achieve accurate control over dynamic loading of the high-ice-grade high-power propeller hub. According to the invention, an electric control system and a hydraulic system of the propeller hub part test bed are improved by means of reliable transformation, and accurate control of loading of a high-ice-grade high-power controllable-pitch propeller hub mechanism is realized by means of low-cost transformation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ship power system test, in particular to a loading control system for the hub of a controllable pitch propeller of a high ice class ship, which is suitable for simulating the dynamic load borne by the hub in an extreme ice area environment and verifying the structural reliability and control accuracy thereof. BACKGROUND

[0002] The controllable pitch propeller (hereinafter referred to as "pitch propeller") is a key equipment of the ship propulsion system, which can flexibly control the thrust size and direction by dynamically adjusting the pitch of the propeller blade, significantly improving the maneuverability of the ship, and has high ship, engine and propeller matching performance and maneuverability (realizing forward, reverse, parking and speed control). The hub, the core executive mechanism of the pitch propeller, bears the core mission of efficiently converting the power of the main engine into the thrust of the ship, and is a difficult point in design and manufacture.

[0003] The pitch propeller system is complex in structure, involving the cooperative work of multiple systems such as hydraulic, control, and machinery (such as hub oil cylinder and rotating blade mechanism), and is long-term working in the underwater environment with high load, high dynamic change and difficult direct monitoring. For ships sailing in high ice class sea areas, the propulsion system needs to withstand the great impact and irregular dynamic stress brought by extreme ice load, which poses unprecedented severe challenges to the load capacity, response accuracy, reliability and durability of the hub and its control system.

[0004] The hub of the pitch propeller of the high ice class ship needs to be tested before manufacture and use to ensure the structural reliability and guarantee the accurate and reliable operation of the hub and the safety and stability of the entire propulsion system in severe ice conditions.

[0005] In the prior art, patent document (CN113916575A) discloses a bridge type hydraulic loading device of a pitch propeller electro-hydraulic system, which can solve the problem of excess force in passive loading, but only aims at static loading of the pitch hydraulic cylinder and does not involve high ice class dynamic load simulation, and the loading power and dimension are insufficient. Patent document (CN119714969A) focuses on the joint test of the shaft propeller propulsion system of an icebreaker, and the load system mainly simulates the propeller torque, which cannot realize multi-directional dynamic loading of the hub and the control accuracy cannot meet the requirements of high ice class.

[0006] Therefore, there is an urgent need to develop a hub loading control system for high ice class and high power application scenarios to accurately control the loading of the hub. SUMMARY

[0007] The present application aims at the problem that the existing propeller hub test bench cannot accurately control and simulate the load in high ice level ice area, and proposes a high ice level high-power propeller hub loading control system, which uses reliability improvement to improve the electric control system and hydraulic system of the propeller hub component test bench, and uses low-cost modification to accurately control the loading of the high ice level high-power adjustable pitch propeller hub mechanism.

[0008] To achieve the above-mentioned purpose, the technical scheme of the present application is: a high ice level high-power propeller hub loading control system, comprising an electric control system, a hydraulic system and a loading cylinder; the electric control system is electrically connected with the hydraulic system and the loading cylinder respectively, used for controlling the action and loading parameters of the loading cylinder and collecting feedback signals; the hydraulic system is connected with the propeller hub through the loading cylinder, used for applying simulated high ice level ice load to the propeller hub; the electric control system, the hydraulic system and the loading cylinder cooperatively realize accurate control of dynamic loading of the high ice level high-power propeller hub.

[0009] Further, the electric control system comprises a loading operation system, a loading control system, a video monitoring system and a control program, used for monitoring and operating the running state of the test bench.

[0010] Further, the loading operation system is composed of an upper computer, a display and an operation program, and the upper computer is internally provided with a current collection module and a current output module; the loading control system comprises a PLC controller and an NI module, used for completing pressure signal collection and PID control of the electro-hydraulic servo valve.

[0011] Further, the PLC controller is in communication connection with the pressure sensor and the electro-hydraulic servo valve, can collect the pressure difference signal of the loading cylinder in real time, and outputs the control signal to the electro-hydraulic servo valve through PID operation.

[0012] Further, the hydraulic system comprises an oil pump, a motor, an oil tank, a cooler, a servo valve, a pressure sensor and a newly added oil distribution block; the oil distribution block divides the oil circuit into five independent oil inlet and return oil circuits, respectively supplies oil to the five loading cylinders, and the oil circuits are independent of each other and do not affect each other.

[0013] Further, the oil pump is an A4VSO250DRG / 30R-PPB13N00 constant pressure variable plunger pump, with a maximum flow of 700L / min; the motor is two M2BAX315MLA motors, with a rated power of 200kW and a rated speed of 1484r / min; and the cooler is YLD1600A, with a cooling capacity of 180kW.

[0014] Further, the servo valve is D634-R40K02MONSS2 type, rated pressure ≥ 28 MPa; the pressure sensor is KAP10-GB40AG12M4B type, accuracy ≤ 0.1% FS, range 0-40 MPa, output signal 4-20 mA.

[0015] Further, the rod diameter of the loading oil cylinder is 160 mm, the cylinder diameter is 280 mm, the stroke is 200 mm, the loading load range is 278.3 kN ± 50%, and the loading frequency is up to 5 Hz.

[0016] Further, the loading oil cylinder is provided with trunnions at the head and tail, the trunnions are provided with joint bearings, one end is connected with a tooling paddle transition piece through a locking nut, and the other end is connected with a rack base through a positioning pin, and can rotate by ± 4°.

[0017] Further, the inner hole diameter of the trunnion connecting the loading oil cylinder with the rack base is Φ80 mm, the inner hole diameter of the trunnion connecting the loading oil cylinder with the tooling paddle is Φ100 mm, and the material of the loading oil cylinder is 45# steel.

[0018] The beneficial effects of the present application are:

[0019] The present application creatively overcomes the core defects that the prior art cannot simulate high ice level ice load (especially for high amplitude, irregular spatial distribution characteristics under high ice level) through the cooperation of high response electro-hydraulic servo control, innovative hydraulic drive structure and loading execution mechanism specially designed for high load. While realizing the simulation of the hub loading, relying on the reuse of the existing structure and the modification design of the hydraulic structure, the reliability and durability of the system are significantly improved, and the modification cost is greatly reduced. This provides economic and efficient test guarantee for the structural reliability verification of the high ice level ship propeller hub under harsh working conditions, and serves the safe navigation of high ice level ships. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a system architecture diagram of the present application;

[0021] Figure 2 is a structure diagram of the oil distribution block;

[0022] Figure 3 is a hydraulic system layout diagram;

[0023] Figure 4 is a structure diagram of the loading oil cylinder;

[0024] Figure 5 is a size marking diagram of the loading oil cylinder. DETAILED DESCRIPTION

[0025] The embodiments of the present application are described in detail below in combination with the drawings:

[0026] AsFigure 1 As shown, the high-ice-grade high-power hub loading control system of the application comprises an electric control system, a hydraulic system and a loading cylinder. The electric control system is used to accurately control the hub loading, the hydraulic system is used to realize the hub loading, and the loading cylinder finally executes the loading, so that the three together realize the accurate control of the hub loading.

[0027] The electric control system part:

[0028] The electric control system of the test bench borrows the electric control system of the reliability improvement and promotion hub component test bench as the test bench monitoring and operating system, which is composed of a loading operating system, a loading control system, a video monitoring system and a control program, etc., and is used for the running state monitoring and operation of the test bench. The system architecture is as shown in Figure 1 .

[0029] The loading operating system is composed of an operating computer (hereinafter referred to as an upper computer), a display and a program.

[0030] The loading control system is mainly composed of a PLC controller and an NI related module. The computer is internally provided with a current acquisition module and a current output module. The loading control system completes the acquisition of the load pressure sensing signal and the PID control of the electro-hydraulic servo valve.

[0031] The hydraulic system part:

[0032] The hydraulic system of the test bench borrows the hydraulic system of the reliability improvement and promotion hub component test bench.

[0033] On the basis of the hydraulic system of the reliability test bench, a new oil distribution block is added, and two standby servo valves (already existing) are enabled. The oil circuit is divided into five groups of oil inlet and oil return oil circuits through the oil distribution block, and oil is supplied to the five loading cylinders. The oil circuit system is independent of the reliability test bench, and does not affect each other. The design of the oil distribution block is as shown in Figure 2 .

[0034] The hydraulic system part:

[0035] The hydraulic system of the test bench borrows the hydraulic system of the reliability improvement and promotion hub component test bench.

[0036] On the basis of the hydraulic system of the reliability test bench, a new oil distribution block is added, and two standby servo valves (already existing) are enabled. The oil circuit is divided into five groups of oil inlet and oil return oil circuits through the oil distribution block, and oil is supplied to the five loading cylinders. The oil circuit system is independent of the reliability test bench, and does not affect each other. The design of the oil distribution block is as shown in Figure 2 .

[0037] The main components of the hydraulic system include an oil pump, a motor, an oil tank, a cooler, a servo valve and a pressure sensor. The oil pump is an A4VSO250DRG / 30R-PPB13N00 constant pressure variable plunger pump, the maximum flow of which is 700 liters per minute; the motor is two M2BAX315MLA motors, the rated power of which is 200 kW, the rated rotating speed of which is 1484 r / min, the working voltage of which is 380 V and the rated frequency of which is 50 Hz; the volume of the oil tank is 5000 L, and the material of the oil tank is 304 stainless steel; the cooler is YLD1600A, and the cooling capacity of the cooler is 180 kW; the servo valve is D634-R40KO2M0NSS2, the rated pressure of which is not less than 28 MPa; and the pressure sensor is KAP10-GB40AG12M4B, the accuracy of which is less than or equal to 0.1% FS, and the range of the sensor is 0-40 MPa. The overall hydraulic system is shown in Figure 3 .

[0038] Loading cylinder part:

[0039] The diameter of the loading cylinder rod is 160 mm, the cylinder diameter is 280 mm, and the stroke is 200 mm. The servo valve is D634-R40K02MONSS2; the valve block is NG6; and the pressure sensor signal is KAP10-GB40AG12M4B (400Bar 4-20ma). The loading load range is 278.3 kN ± 50%. The loading frequency is up to 5 Hz.

[0040] As shown in Figure 4 , the loading cylinder has two trunnions at the head and tail, the trunnions are internally provided with joint bearings, one end A is connected with a transition connecting piece of a tooling paddle (locked by a locking nut), and one end B is connected with a rack base through a positioning pin (locked by a snap spring), and the rotatable angle is ± 4°.

[0041] The inner hole diameter of the trunnion, which connects the loading cylinder with the rack base, is Φ80 mm, and the inner hole diameter of the trunnion, which connects the loading cylinder with the tooling paddle, is Φ100 mm.

[0042] The main material of the loading cylinder is 45# steel. The structure and size of the loading cylinder are shown in Figure 4 and Figure 5 .

[0043] In summary, through precise control, structure optimization and low-cost transformation, the load simulation problem of high-ice-class paddle hubs is effectively solved, and an efficient test method is provided for reliability verification.

Claims

1. A high-ice-grade, high-power propeller hub loading control system, characterized in that, It includes an electronic control system, a hydraulic system, and a loading cylinder; the electronic control system is electrically connected to the hydraulic system and the loading cylinder respectively, and is used to control the action of the loading cylinder and the loading parameters and to collect feedback signals; the hydraulic system is mechanically connected to the propeller hub through the loading cylinder, and is used to apply simulated high-ice-level ice load to the propeller hub; the electronic control system, the hydraulic system, and the loading cylinder work together to achieve precise dynamic loading control of the high-ice-level high-power propeller hub.

2. The high-ice-grade high-power propeller hub loading control system according to claim 1, characterized in that, The electronic control system includes a loading operation system, a loading control system, a video monitoring system, and a control program, which are used for monitoring and controlling the operating status of the test bench.

3. The high-ice-grade high-power propeller hub loading control system according to claim 2, characterized in that, The loading control system consists of a host computer, a display, and an operating program. The host computer is equipped with a current acquisition module and a current output module. The loading control system includes a PLC controller and an NI module, which are used to complete pressure signal acquisition and PID control of the electro-hydraulic servo valve.

4. The high-ice-grade high-power propeller hub loading control system according to claim 2, characterized in that, The PLC controller is connected to the pressure sensor and the electro-hydraulic servo valve, and can collect the pressure difference signal of the loading cylinder in real time. It outputs control signal to the electro-hydraulic servo valve through PID calculation.

5. The high-ice-grade high-power propeller hub loading control system according to claim 1, characterized in that, The hydraulic system includes an oil pump, a motor, an oil tank, a cooler, a servo valve, a pressure sensor, and a newly added oil distribution block. The oil distribution block divides the oil circuit into five independent inlet and return oil circuits, which supply oil to five loading cylinders respectively. The oil circuits and the reliability test bench are independent of each other and do not affect each other.

6. The high-ice-grade high-power propeller hub loading control system according to claim 5, characterized in that, The oil pump is an A4VSO250DRG / 30R-PPB13N00 constant pressure variable displacement piston pump with a maximum flow rate of 700L / min; the motor consists of two M2BAX315MLA motors with a rated power of 200kW and a rated speed of 1484r / min; the cooler is a YLD1600A with a cooling capacity of 180kW.

7. The high-ice-grade high-power propeller hub loading control system according to claim 5, characterized in that, The servo valve is of type D634-R40K02MONSS2, with a rated pressure ≥28MPa; the pressure sensor is of type KAP10-GB40AG12M4B, with an accuracy ≤0.1%FS, a range of 0~40MPa, and an output signal of 4~20mA.

8. The high-ice-grade high-power propeller hub loading control system according to claim 1, characterized in that, The loading cylinder has a rod diameter of 160mm, a cylinder diameter of 280mm, a stroke of 200mm, a loading load range of 278.3kN±50%, and a maximum loading frequency of 5Hz.

9. The high-ice-grade high-power propeller hub loading control system according to claim 8, characterized in that, The loading cylinder is equipped with trunnions at both ends, and spherical bearings are installed inside the trunnions. One end is connected to the tooling blade transition piece through a locking nut, and the other end is connected to the platform base through a positioning pin. It can rotate by ±4°.

10. The high-ice-grade high-power propeller hub loading control system according to claim 8, characterized in that, The loading cylinder has an inner diameter of Φ80mm for the trunnion connecting to the base of the platform and an inner diameter of Φ100mm for the trunnion connecting to the tooling blade. The loading cylinder is made of 45# steel.

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