Used for fine-tuning the pitch angle adjustment and indication mechanism of propeller blades

Abstract

The present invention relates to a pitch angle adjustment and indication mechanism for a fine-tuning pitch propeller blade, comprising an angle indication scale plate and a pitch angle adjustment mechanism, wherein the angle indication scale plate is composed of a main scale plate and a sub-scale plate, and is used to indicate the angle of the blade pitch, wherein the main scale plate and the sub-scale plate are respectively mounted on the blade root flange plane and the hub body blade root bearing radial circumferential surface, and the "0" line on the main scale plate is aligned with the "0" line on the sub-scale plate; the pitch angle adjustment mechanism is composed of a joint component 1, a joint component 2, and a double-headed internal threaded stud; one end of the joint component 1 is connected to the internal threaded hole on the blade root flange, and the other end is connected to the internal thread of one end of the double-headed internal threaded stud; one end of the joint component 2 is connected to the radial internal threaded hole of the hub body blade root bearing, and the other end is connected to the internal thread of the other end of the double-headed internal threaded stud. The present invention can realize the precise adjustment of the pitch angle of the fine-tuning pitch propeller blade.

Description

Technical Field

[0001] The invention relates to a propeller for ship power propulsion, in particular to a pitch angle adjustment and indication mechanism for a fine-tuning pitch propeller blade. Background Art

[0002] The blade pitch of a fine-pitch propeller can be adjusted steplessly within a certain range at its designed pitch position to compensate for the ship's resistance to a certain extent, thereby solving the problem of changes in ship resistance due to long-term operation of the ship and achieving the best matching of ship-engine-propeller propulsion performance; at the same time, for propellers of multiple sets of propulsion shaft systems, the dynamic balance matching of multiple propellers can be achieved according to their different arrangements and depths. Therefore, a special mechanism is needed to accurately adjust and indicate the pitch angle of the fine-pitch propeller blades. Summary of the invention

[0003] The purpose of the present invention is to propose a pitch angle adjustment and indication mechanism for a fine-tuning pitch propeller blade, so as to achieve precise adjustment of the pitch angle of the fine-tuning pitch propeller blade, thereby changing the hydrodynamic performance of the propeller, so as to achieve the purpose of optimal matching of ship-engine-propeller performance.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is: a pitch angle adjustment and indication mechanism for fine-tuning pitch propeller blades, comprising an angle indication scale plate and a pitch angle adjustment mechanism, wherein the angle indication scale plate is composed of a main scale plate and a sub-scale plate, and is used to indicate the angle of the blade pitch, and the main scale plate and the sub-scale plate are respectively installed on the plane of the blade root flange and the radial circumferential surface of the hub body blade root bearing, and the "0" line on the main scale plate is aligned with the "0" line on the sub-scale plate; the pitch angle adjustment mechanism is composed of a joint component 1, a joint component 2 and a double-headed internally threaded stud; one end of the joint component 1 is connected to the internally threaded hole on the blade root flange, and the other end is connected to the internal thread of one end of the double-headed internally threaded stud; one end of the joint component 2 is connected to the radial internally threaded hole of the hub body blade root bearing, and the other end is connected to the internally threaded end of the other end of the double-headed internally threaded stud.

[0005] Furthermore, the main scale plate is engraved with graduation lines in degrees, with the "0" line as the starting point, the scale line on the right side of the "0" line is marked as "+", and the scale line on the left side is marked as "-"; the "+" value indicates that the propeller pitch angle is adjusted in the forward direction, and the "-" value indicates that the propeller pitch angle is adjusted in the reverse direction.

[0006] Furthermore, the number of grid lines on the secondary scale plate is tenths or twentyths of a degree.

[0007] Furthermore, the angle value of the blade pitch indicated by the angle indicating scale plate=main scale reading+(nth scale line-1)×division value.

[0008] Furthermore, the joint assembly 1 is composed of a large nut, a circular connector, and a stud. The stud is connected to the threaded hole on the blade root flange plane, and the circular connector is connected to the stud via the large nut.

[0009] Furthermore, the joint assembly 2 is composed of a grooved connector, a single-head screw, a small nut, and a bolt. The single-head screw is connected to the radial threaded hole of the hub blade root bearing, and the grooved connector is connected to the single-head screw through a small nut and a bolt.

[0010] Furthermore, the large nut, double-headed stud in the joint component one and the single-headed screw, small nut, and bolt in the joint component two have the same thread direction, which is right-hand thread.

[0011] Furthermore, both ends of the double-headed internally threaded stud are respectively provided with internally threaded holes, and the threads at both ends have opposite rotation directions, that is, one end is a left-handed internal thread and the other end is a right-handed internal thread.

[0012] Furthermore, when the double-headed internal threaded stud is rotated clockwise or counterclockwise, the distance between the joint component 1 and the joint component 2 increases or decreases, thereby driving the blade to rotate clockwise or counterclockwise, thereby increasing or decreasing the blade pitch angle and completing the adjustment of the blade pitch.

[0013] The beneficial effects of the present invention are:

[0014] The special mechanism for pitch angle adjustment and indication designed by the present invention can realize precise adjustment of the pitch angle of the blade, which can not only resolve the uncertain risks caused by the design and manufacture of propellers for new ships, but also solve the problem of poor ship-engine-propeller matching caused by changes in ship resistance for ships in service, and at the same time solve the problem of power imbalance caused by different propeller arrangements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the installation of the special mechanism for adjusting and indicating the pitch angle of the propeller blades;

[0016] Figure 2 This is a schematic diagram of the angle indicating scale plate;

[0017] Figure 3 It is a schematic diagram of the main scale plate;

[0018] Figure 4 It is a schematic diagram of the sub-scale plate;

[0019] Figure 5 is a schematic diagram of the pitch angle adjustment mechanism;

[0020] In the figure: 1. scale plate, 2. pitch angle adjustment mechanism, 3. blade root flange, 4. hub body blade root bearing, 1-1. main scale plate, 1-2. secondary scale plate, 2-1. joint assembly one, 2-1-1. large nut, 2-1-2. circular connector, 2-1-3. double-headed stud, 2-2. joint assembly two, 2-2-1. grooved connector, 2-2-2. single-headed screw, 2-2-3. small nut, 2-2-4. bolt, 2-3. double-headed internal threaded stud. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] This embodiment is a special mechanism for adjusting and indicating the pitch angle of a fine-pitch propeller blade, which is installed between the blade root flange and the hub body blade root bearing, and is used to adjust and indicate the pitch angle of a fine-pitch propeller blade. The mechanism includes an angle indicating scale plate 1 (including a main scale plate 1-1 and a secondary scale plate 1-2), a pitch angle adjustment mechanism 2 (including a joint assembly 1 2-1 (including a large nut 2-1-1, a round connector 2-1-2, and a double-headed stud 2-1-3), a joint assembly 2-2 (including a grooved connector 2-2-1, a single-headed screw 2-2-2, a small nut 2-2-3, a bolt 2-2-4), and a double-headed internal threaded stud 2-3), see the attached Figure 1 ~Attached Figure 5 Special tools for .

[0023] The specific implementation plan is as follows:

[0024] The main scale plate 1-1 is installed on the plane of the blade root flange 3, and the sub-scale plate 1-2 is installed on the radial circumferential surface of the blade root bearing 4 of the hub body; the "0" line on the main scale plate 1-1 is aligned with the "0" line on the sub-scale plate 1-2; the main scale plate is engraved with graduation lines generally in degrees, with the "0" line as the starting point, and generally the scale line on the right side of the "0" line is marked as "+", and the scale line on the left side is marked as "-"; the "+" value indicates that the blade pitch angle is adjusted in the forward direction, and the "-" value indicates that the blade pitch angle is adjusted in the reverse direction; according to the different number of division lines on the sub-scale plate, it can generally be divided into two types: ten-degree and twenty-degree.

[0025] When reading, first read the degree on the main scale plate based on the "0" scale line on the sub-scale plate, and then read the nth scale line on the sub-scale plate that is aligned with the scale line on the main scale plate;

[0026] When adjusting the propeller pitch angle in the forward direction, read the nth alignment scale line on the auxiliary scale plate from right to left; when adjusting the propeller pitch angle in the reverse direction, read the nth alignment scale line on the auxiliary scale plate from left to right.

[0027] Angle value = main scale reading + (nth scale line - 1) × division value.

[0028] A threaded hole is provided on the plane of the blade root flange 3, and the stud 2-1-3 is connected to the threaded hole on the plane of the blade root flange 3, and the circular connector 2-1-2 is connected to the stud 2-1-3 through the large nut 2-1-1. A threaded hole is provided radially on the hub body blade root bearing 4, and the single-head screw 2-2-2 is connected to the radial threaded hole of the hub body blade root bearing 4, and the groove connector 2-2-1 is connected to the single-head screw 2-2-2 through a small nut 2-2-3 and a bolt 2-2-4. The internal threads at both ends of the double-head internal threaded stud 2-3 have opposite rotation directions, that is, one end is a left-handed internal thread and the other end is a right-handed internal thread. The external threads of the circular connector 2-1-2 and the groove connector 2-2-1 have the same rotation direction, generally right-handed threads. One end of the double-headed internal thread stud 2-3 is connected to the external thread of the circular connector 2-1-2 by internal thread, and the other end of the double-headed internal thread stud 2-3 is connected to the external thread of the grooved connector 2-2-1 by internal thread.

[0029] During adjustment, a special wrench is used to rotate the double-headed internal threaded stud 2-3 to increase or decrease the distance between the circular connector 2-1-2 and the grooved connector 2-2-1, thereby driving the blade root flange 3 to rotate and increasing or decreasing the blade pitch angle. The blade pitch adjustment angle can be obtained by reading the angle number on the scale plate 1, thereby completing the blade pitch adjustment.

Claims

1. A pitch angle adjustment and indication mechanism for fine-tuning a pitch propeller blade, comprising an angle indication scale plate and a pitch angle adjustment mechanism, characterized in that: The angle indicating scale plate is composed of a main scale plate and a sub-scale plate, and is used to indicate the angle of the blade pitch. The main scale plate and the sub-scale plate are respectively installed on the plane of the blade root flange and the radial circumferential surface of the hub body blade root bearing, and the "0" line on the main scale plate is aligned with the "0" line on the sub-scale plate; the pitch angle adjustment mechanism is composed of a joint component 1, a joint component 2 and a double-headed internally threaded stud; one end of the joint component 1 is connected to the internally threaded hole on the blade root flange, and the other end is connected to the internal thread of one end of the double-headed internally threaded stud; one end of the joint component 2 is connected to the radial internally threaded hole of the hub body blade root bearing, and the other end is connected to the internally threaded end of the double-headed internally threaded stud; the number of grid lines on the sub-scale plate is ten degrees or twenty degrees; the angle value of the blade pitch indicated by the angle indicating scale plate = the main scale reading + (the nth scale line - 1) × the division value.

2. The pitch angle adjustment and indication mechanism for fine-tuning the pitch propeller blade according to claim 1, characterized in that: The main scale plate is engraved with graduation lines in degrees, with the "0" line as the starting point, the scale line on the right side of the "0" line is marked as "+", and the scale line on the left side is marked as "-"; the "+" value indicates that the propeller pitch angle is adjusted in the forward direction, and the "-" value indicates that the propeller pitch angle is adjusted in the reverse direction.

3. The pitch angle adjustment and indication mechanism for fine-tuning the pitch propeller blades according to claim 1, characterized in that: The joint assembly 1 is composed of a large nut, a circular connector, and a stud. The stud is connected to the threaded hole on the blade root flange plane, and the circular connector is connected to the stud via the large nut.

4. The pitch angle adjustment and indication mechanism for fine-tuning the pitch propeller blades according to claim 1, characterized in that: The second joint assembly consists of a grooved connector, a single-head screw, a small nut, and a bolt. The single-head screw is connected to the radial threaded hole of the hub blade root bearing, and the grooved connector is connected to the single-head screw through a small nut and a bolt.

5. The pitch angle adjustment and indication mechanism for fine-tuning the pitch propeller blades according to claim 1, characterized in that: The large nut and stud in the joint component 1 and the single-head screw, small nut and bolt in the joint component 2 have the same thread direction, which is right-hand thread.

6. The pitch angle adjustment and indication mechanism for fine-tuning the pitch propeller blades according to claim 1, characterized in that: The two ends of the double-headed internal threaded stud are respectively provided with internal threaded holes, and the threads at the two ends have opposite rotation directions, that is, one end is a left-handed internal thread and the other end is a right-handed internal thread.

7. The pitch angle adjustment and indication mechanism for fine-tuning the pitch propeller blades according to claim 1, characterized in that: When the double-headed internal threaded stud is rotated clockwise or counterclockwise, the distance between the joint component 1 and the joint component 2 increases or decreases, thereby driving the blade to rotate clockwise or counterclockwise, thereby increasing or decreasing the blade pitch angle and completing the adjustment of the blade pitch.

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