A device for adjusting a propeller beta gate

Abstract

The present application relates to propeller beta valve adjustment technical field, provide a kind of adjusting propeller beta valve device, at least include: beta lever, beta lever is suitable for hinged installation propeller beta valve;Guide rod, one end is hinged connection with the one end of beta lever;Adjusting screw sleeve, one end is connected with the one end of guide rod away from beta lever;Steel cable, one end is suitable for fixed on the engine casing, the other end is connected with the one end of adjusting screw sleeve away from guide rod, adjusting screw sleeve can move along the length direction of steel cable and drive guide rod synchronous movement, to make guide rod drive beta lever movement, to adjust the position of propeller beta valve on beta lever.The adjusting propeller beta valve device provided by the present application can realize the quick adjustment of propeller beta valve position, meet the propeller slow car positive propeller speed requirement, and the executable of adjustment is higher, more time-saving and labor-saving.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of propeller beta valve adjustment, and particularly relates to a device for adjusting a propeller beta valve. BACKGROUND

[0002] At present, an operation mechanism is used to adjust the beta valve in a control system, and the operation mechanism mainly comprises a steel cable adjusting assembly, a connecting rod, a handle and a stop pin. When adjusting, the steel cable adjusting assembly and the adjusting connecting rod need to be adjusted synchronously, and after the length of the steel cable is adjusted, the positions of the handle and the stop pin need to be reset. If the handle and the stop pin are not close enough, the connecting rod needs to be continuously adjusted. Since the operation mechanism is relatively complex, the adjustability of the beta valve is poor. Moreover, in order to ensure that the minimum propeller speed after the engine runs meets the requirements, the initial position of the beta valve needs to be repeatedly adjusted by the operation mechanism according to the speed of the engine after the engine runs, which results in a time-consuming and laborious adjustment process. SUMMARY

[0003] Therefore, the technical problem to be solved by the present application is that the operation mechanism in the prior art is complex in structure, and the adjustability of the beta valve is poor. Moreover, for the beta valve that needs to be repeatedly adjusted for multiple times, the adjustment process is more time-consuming and laborious, so as to provide a device for adjusting a propeller beta valve.

[0004] To solve the above technical problems, the technical scheme of the present application is as follows:

[0005] A device for adjusting a propeller beta valve, at least comprising: a beta lever, the beta lever being adapted to be hingedly connected to a propeller beta valve; a guide rod, one end of the guide rod being hingedly connected to one end of the beta lever;

[0006] an adjusting sleeve, one end of the adjusting sleeve being connected to the end of the guide rod away from the beta lever; a steel cable, one end of the steel cable being adapted to be fixed on an engine case, and the other end of the steel cable being connected to the end of the adjusting sleeve away from the guide rod, the adjusting sleeve being capable of moving along the length direction of the steel cable and driving the guide rod to move synchronously, so that the guide rod drives the beta lever to move, thereby adjusting the position of the propeller beta valve on the beta lever.

[0007] Further, the device for adjusting a propeller beta valve further comprises a first pressure receiving connector, the first pressure receiving connector being sleeved on the end of the steel cable close to the adjusting sleeve, and the first pressure receiving connector being at least partially inserted into the adjusting sleeve; the surface of the first pressure receiving connector is provided with external threads, and the adjusting sleeve is threadedly connected with the first pressure receiving connector.

[0008] Further, the surface of the guide rod is provided with a first limiting clamping body, the inner wall of the adjusting sleeve is provided with a clamping groove matched with the first limiting clamping body, one end of the guide rod is inserted into the adjusting sleeve, and the guide rod is limited from moving in the direction away from the steel cable through the first limiting clamping body and the clamping groove.

[0009] Further, the device for adjusting the propeller beta valve further comprises a spiral spring, one end of which is sleeved on the guide rod and abuts against the first limiting clamping body, and the inner wall of one end of the adjusting sleeve close to the steel cable is provided with a second limiting clamping body, and the other end of the spiral spring abuts against the second limiting clamping body.

[0010] Further, the device for adjusting the propeller beta valve further comprises a compression nut, a second compression joint and a connecting sleeve, the second compression joint is sleeved on one end of the steel cable away from the adjusting sleeve, the second compression joint and the steel cable pass through the mounting through hole on the engine case, the connecting sleeve is sleeved on the steel cable and passes through the mounting through hole on the engine case, one end of the connecting sleeve abuts against the second compression joint, and the other end abuts against the side of the engine case away from the second compression joint, and the compression nut is sleeved on the connecting sleeve and located on the side of the engine case towards the second compression joint, so that the connecting sleeve is fixed on the engine case.

[0011] Further, the guide rod and the beta lever are connected through a first pin shaft and a first split pin, and the propeller beta valve is installed on the beta lever through a second pin shaft and a second split pin.

[0012] Further, one end of the beta lever away from the guide rod is provided with an insertion rod, one end of the insertion rod is fixedly connected with the beta lever, and the other end is adapted to be sleeved with a propeller feedback ring.

[0013] Further, the beta lever comprises a first rod body and a second rod body connected with each other, and the first rod body and the second rod body are arranged at an obtuse angle; the propeller beta valve is located at the intersection of the first rod body and the second rod body; wherein the second rod body is away from the guide rod, and the insertion rod is located on the second rod body.

[0014] The technical scheme has the following advantages:

[0015] The device for adjusting the propeller β valve provided by this invention reduces the exposed length of the steel cable when the adjusting sleeve is rotated clockwise. At this time, the guide rod, β lever, and propeller β valve on it all move to the left under the drive of the adjusting sleeve. Conversely, the exposed length of the steel cable increases when the adjusting sleeve is rotated counterclockwise. At this time, the guide rod, β lever, and propeller β valve on it all move to the right under the drive of the adjusting sleeve. This achieves rapid adjustment of the propeller β valve position, meets the propeller idle speed requirements, and has higher operability and saves more time and effort. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the device for adjusting the propeller β valve in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. First compression joint; 2. Connecting sleeve; 3. Compression nut; 4. Steel cable; 5. Second compression joint; 6. Adjusting screw sleeve; 7. Helical spring; 8. Guide rod; 9. First pin; 10. First cotter pin; 11. β lever; 12. Second pin; 13. Second cotter pin; 14. Engine casing; 15. Propeller β valve; 16. Propeller feedback ring; 17. First rod; 18. Second rod. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the connection within two components.

[0023] Connectivity. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Figure 1 This is a schematic diagram of the device for adjusting the propeller β valve in an embodiment of the present invention, as shown below. Figure 1 As shown, this embodiment provides a device for adjusting a propeller β valve 15, comprising at least: a β lever 11, on which the propeller β valve 15 is hingedly mounted; a guide rod 8, one end of which is hingedly connected to one end of the β lever 11; an adjusting sleeve 6, one end of which is connected to the end of the guide rod 8 away from the β lever 11; and a steel cable 4, one end of which is adapted to be fixed to the engine casing 14, and the other end of which is connected to the end of the adjusting sleeve 6 away from the guide rod 8. The adjusting sleeve 6 can move along the length of the steel cable 4 and drive the guide rod 8 to move synchronously, so that the guide rod 8 drives the β lever 11 to move, thereby adjusting the position of the propeller β valve 15 on the β lever 11.

[0026] The device for adjusting the propeller β valve 15 provided in this embodiment reduces the length of the exposed steel cable 4 when the adjusting sleeve 6 is rotated clockwise. At this time, the guide rod 8, β lever 11, and the propeller β valve 15 on it all move to the left under the drive of the adjusting sleeve 6. Conversely, when the adjusting sleeve 6 is rotated counterclockwise, the length of the exposed steel cable 4 increases. At this time, the guide rod 8, β lever 11, and the propeller β valve 15 on it all move to the right under the drive of the adjusting sleeve 6. This achieves rapid adjustment of the position of the propeller β valve 15, meets the propeller idle speed requirements, and has higher operability and saves more time and effort.

[0027] The device for adjusting the propeller β valve 15 also includes a first compression joint 1, which is sleeved on the end of the steel cable 4 near the adjusting screw sleeve 6. The first compression joint 1 wraps around the end of the steel cable 4, thus fixing the two together. The first compression joint 1 at least partially extends into the adjusting screw sleeve 6. For example, an external thread can be provided on the surface of the first compression joint 1, and the inner ring of the adjusting screw sleeve 6 has an internal thread. The adjusting screw sleeve 6 and the first compression joint 1 are threadedly connected, and the adjusting screw sleeve 6 can be tightened to allow for...

[0028] It can move forward or backward along the length of cable 4.

[0029] The guide rod 8 has a first limiting catch on its surface, and the adjusting sleeve 6 has a groove on its inner wall that matches the first limiting catch. For example, the first limiting catch can be arranged circumferentially around the surface of the guide rod 8. Similarly, the groove is arranged circumferentially around the inner wall of the adjusting sleeve 6. When one end of the guide rod 8 is inserted into the adjusting sleeve 6, the first limiting catch can abut against the groove wall, thus restricting the guide rod 8 from moving away from the steel cable 4. With this configuration, when the adjusting sleeve 6 moves to the left, the guide rod 8 moves synchronously to the left under the action of the first limiting catch and the groove.

[0030] For example, the device for adjusting the propeller β valve 15 also includes a helical spring 7, one end of which is sleeved on the guide rod 8 and abuts against the first limiting body; a second limiting body is provided on the inner wall of the adjusting sleeve 6 near the steel cable 4, and the other end of the helical spring 7 abuts against the second limiting body. With this configuration, when the adjusting sleeve 6 moves to the right, the helical spring 7 causes the guide rod 8 to move to the right as a whole until the first limiting body and the slot are pressed together, simultaneously allowing the guide rod 8 to move to the right. Furthermore, due to the action of the helical spring 7, there is a buffering process regardless of whether the adjusting sleeve 6 moves to the left or right, preventing abrupt changes in the movement of the guide rod 8 and ensuring the smooth adjustment of the propeller β valve 15.

[0031] The device for adjusting the propeller β valve 15 also includes a clamping nut 3, a second clamping connector 5, and a connecting sleeve 2. The second clamping connector 5 is fitted onto the end of the steel cable 4 away from the adjusting screw sleeve 6, and the second clamping connector 5 wraps around the end of the steel cable 4 to fix both. The second clamping connector 5, together with the steel cable 4, passes through the mounting through hole on the engine casing 14. The connecting sleeve 2 is fitted onto the steel cable 4 and passes through the mounting through hole on the engine casing 14. One end of the connecting sleeve 2 abuts against the second clamping connector 5, and the other end abuts against the side of the engine casing 14 facing away from the second clamping connector 5. The clamping nut 3 is fitted onto the connecting sleeve 2 and is located on the side of the engine casing 14 facing the second clamping connector 5 to fix the connecting sleeve 2 to the engine casing 14. This arrangement allows the steel cable to be clamped onto the engine casing 14.

[0032] The end of cable 4 furthest from the adjusting sleeve 6 is fixed to prevent cable 4 from moving when adjusting the propeller β valve 15, thus affecting the adjustment accuracy. Moreover, when it is necessary to adjust the length of cable 4, the clamping nut 3 can be loosened, and after the length of cable 4 located on the right side of the engine casing is adjusted to the correct position, the clamping nut 3 can be tightened again.

[0033] The guide rod 8 and the β lever 11 are hinged together by the first pin 9 and the first cotter pin 10, which allows the β lever 11 and the guide rod 8 to rotate at a small angle. The propeller β valve 15 is hinged to the β lever 11 by the second pin 12 and the second cotter pin 13, which also allows the β lever 11 and the propeller β valve 15 to rotate at a small angle.

[0034] Among them, the end of the β lever 11 away from the guide rod 8 is provided with a plug rod; one end of the plug rod is fixedly connected to the β lever 11, and the other end is suitable for fitting the propeller feedback ring 16. At this time, the propeller feedback ring 16 can rotate relative to the plug rod. When the propeller feedback ring 16 moves to the left or right, it can drive the propeller β valve 15 to move to the left or right through the β lever 11.

[0035] Preferably, the β lever 11 includes a first rod 17 and a second rod 18 connected together, with the first rod 17 and the second rod 18 forming an obtuse angle, the size of which can be designed according to actual needs; the propeller β valve 15 can be located at the intersection of the first rod 17 and the second rod 18; wherein, the part of the β lever 11 furthest from the guide rod 8 is the second rod 18, and the insertion rod can be located on the second rod 18, and is relatively close to the tail end of the second rod 18.

[0036] The device for adjusting the propeller β valve 15 is used in two specific ways:

[0037] Slow speed adjustment:

[0038] Since the initial installation position of the propeller β valve 15 affects the idle propeller speed (i.e., the blade installation angle) and whether reverse propeller rotation can be successfully achieved, the initial installation position of the propeller β valve 15 can be adjusted by rotating the adjusting sleeve 6. Clockwise rotation (viewed in the direction of flight) shortens the steel cable 4, causing the propeller β valve 15 to move to the left; counterclockwise rotation lengthens the steel cable 4, causing the propeller β valve...

[0039] 15 moves to the left to quickly adjust the position of propeller β valve 15 so that it meets the propeller idle speed requirements.

[0040] Small pitch adjustment:

[0041] When the control system is in state β (when the indicated propeller speed is lower than the selected propeller speed, when the propeller speed changes due to changes in engine operating speed, or when moving the propeller speed control lever does not change the propeller speed), the pitch control is a direct function of the position of the propeller β valve 15.

[0042] When the engine is operating at low power, the propeller shaft is at its "maximum speed" position. Since the propeller speed is insufficient, high-pressure lubricating oil enters the propeller cylinder, causing the blades to move towards a smaller pitch. The propeller feedback loop 16 moves to the left, which is transmitted to the propeller β valve 15 via the β lever 11. The leftward movement of the propeller β valve 15 causes a drop in servo pressure, preventing further changes in the blade angle. At this point, the blade angle is no longer a function of the propeller governor, but is controlled by the propeller β valve 15.

[0043] When the engine changes state and switches to high-power operation, the high-pressure lubricating oil in the propeller cylinder decreases, causing the propeller blades to move towards a larger pitch. The feedback loop moves to the right and is transmitted to the propeller β valve 15 via the β lever 11. The propeller β valve 15 moves to the right and eventually returns to the starting position.

[0044] In addition, the helical spring 7 designed in the propeller β valve 15 adjustment device can balance the working force of the propeller feedback ring 16 when it moves left and right, ensuring smooth operation.

[0045] In summary, the device for adjusting the propeller β valve 15 in this application has a novel, practical, simple, and compact structural design with few parts, which reduces disassembly and assembly procedures and lowers maintenance requirements and costs. Moreover, the adjustment operation is simple and convenient, enabling rapid adjustment of the turboprop engine propeller's idle speed and smooth adjustment of the small pitch.

[0046] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A device for adjusting a propeller β valve, characterized in that, At least including: β lever, on which a propeller β valve is adapted to be hingedly mounted; One end of the guide rod is hinged to one end of the β lever; The adjusting sleeve is connected at one end to the end of the guide rod away from the β lever; A steel cable, one end of which is adapted to be fixed to the engine casing, and the other end of which is connected to the end of the adjusting sleeve away from the guide rod. The adjusting sleeve can move along the length of the steel cable and drive the guide rod to move synchronously, so that the guide rod drives the β lever to move, thereby adjusting the position of the propeller β valve on the β lever.

2. The device for adjusting the propeller β valve according to claim 1, characterized in that, It also includes a first compression joint, which is sleeved on the end of the steel cable near the adjusting screw sleeve, and the first compression joint extends at least partially into the adjusting screw sleeve; The surface of the first pressure-retracting connector is provided with external threads, and the adjusting sleeve is threadedly connected to the first pressure-retracting connector.

3. The device for adjusting the propeller β valve according to claim 1, characterized in that, The guide rod has a first limiting clip on its surface, and the inner wall of the adjusting screw sleeve has a slot that matches the first limiting clip. One end of the guide rod is inserted into the adjusting screw sleeve, and the first limiting clip and the slot restrict the guide rod from moving away from the steel cable.

4. The device for adjusting the propeller β valve according to claim 3, characterized in that, It also includes a helical spring, one end of which is sleeved on the guide rod and abuts against the first limiting clip; A second limiting clip is provided on the inner wall of the adjusting screw sleeve near the end of the steel cable, and the other end of the helical spring abuts against the second limiting clip.

5. The device for adjusting the propeller β valve according to claim 1, characterized in that, It also includes a clamping nut, a second compression fitting, and a connecting sleeve; The second compression fitting is sleeved on the end of the steel cable away from the adjusting nut, and the second compression fitting together with the steel cable passes through the mounting through hole on the engine casing; The connecting sleeve is fitted onto the steel cable and passes through the mounting through hole on the engine casing. One end of the connecting sleeve abuts against the second pressure joint, and the other end abuts against the side of the engine casing opposite to the second pressure joint. The clamping nut is sleeved on the connecting sleeve and located on the side of the engine casing facing the second compression joint, so as to fix the connecting sleeve to the engine casing.

6. The device for adjusting the propeller β valve according to claim 1, characterized in that, The guide rod and the β lever are hinged together by a first pin and a first cotter pin. The propeller β valve is hinged to the β lever via a second pin and a second cotter pin.

7. The device for adjusting the propeller β valve according to any one of claims 1-6, characterized in that, A plug is provided at the end of the β lever away from the guide rod; One end of the insertion rod is fixedly connected to the β lever, and the other end is adapted to be fitted with a propeller feedback loop.

8. The device for adjusting the propeller β valve according to claim 7, characterized in that, The β lever includes a first rod and a second rod connected together, with the first rod and the second rod arranged at an obtuse angle. The propeller β valve is located at the intersection of the first rod and the second rod; In this configuration, the part of the β lever furthest from the guide rod is the second rod body, and the insertion rod is located on the second rod body.

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