A mechanical mixing unit

Abstract

The invention relates to a body (2) which is the main structure of the rotary wing aircraft; at least one collective control rod (3) that is located within the body (2) and provides the creation of collective movement input by the user to control the body (2); at least one cyclic control rod (4) that is located within the body (2) and provides the creation of cyclic movement input by the user; more than one output control rod (5) that are located in connection with the collective control rod (3) and the cyclic control rods (4) and to which the collective control rod (3) and / or cyclic control rods (4) transfer movement; and at least one arm (6) which allows changing the direction and / or amount of movement transferred to the output control rods (5) by the collective control rod (3) and / or cyclic control rods (4).

Description

[0001] A MECHANICAL MIXING UNIT

[0002] The present invention relates to the mechanical mixing unit in helicopters. The control mechanical mixing unit is used to provide precise and accurate control of the main rotor system. This unit allows the pilot to control the pitch angles of the main rotor blades. Providing the desired control inputs to the rotor system correctly is an important factor in terms of the stability and manoeuvrability of the helicopter. In addition, this unit reduces the pilot workload by ensuring that the helicopter flies stably, thus allowing the helicopter to fly more safely and precisely.

[0003] In the United States patent document numbered US2663374 in the state of the art, a helicopter rotor mechanical mixing unit consisting of two blades that are completely controlled independently of each other is mentioned. In the mechanism in the document, it is mentioned that when collective and cyclic inputs are made by the pilot, one movement will not affect the other.

[0004] In the United States patent document numbered US4650400 in the state of the art, a mechanism in which collective and cyclic pitch movements are controlled independently of each other is mentioned. It ensures that the collective and cyclic pitch angle adjustments of the blades are made independently.

[0005] The aim of the present invention is to separate the collective control movement and cyclic control movement in a way that does not create an undesirable control interaction with each other, and to ensure that the movements are made through different sub-mechanisms. In this way, an undesirable control input formation or loss that may arise from control interactions is prevented.

[0006] The mechanical mixing unit, which is realised to achieve the aim of the invention and defined in the first claim and the claims dependent on this claim, comprises a body which is the main structure of the rotary wing aircraft, at least one collective control rod which provides the necessary input for the body to be able to move collectively in the vertical axis, and at least one cyclic control rod which provides the formation of the cyclic movement input. The invention comprises more than one output control rod which transmit the movement received by the collective control rod and / or cyclic control rod, and at least one arm which allows changing the direction and / or amount of the movement transmitted to the output control rods by the collective control rod and / or cyclic control rod. The arm works like a bell crank mechanism while performing its function.

[0007] The mechanical mixing unit which is the subject of the invention comprises at least one shaft that is located inside the body, can rotate around its own axis when triggered, and has arms on it. It comprises at least one connection arm which enables the body to make collective movement by rotating together with the shaft when the collective control rod is triggered and the output control rods moving in the same orientation and direction. It comprises at least one bearing that is located between the shaft and connection arm, and ensures that the arm remains fixed while the shaft moves. By means of the bearing, the collective control rod is triggered and the arm is prevented from being affected by this movement while the shaft moves. While the connection arms that are directly connected to the shaft move with the shaft, the arm remains fixed while the shaft moves by means of the bearing that is located between the shaft and the arm. In this way, collective and cyclical movements are created, it is ensured that they do not affect each other and the coupling effect caused by the output control rods is reduced.

[0008] In one embodiment of the invention, the mechanical mixing unit comprises an output control rod that moves linearly by the user in the direction by the collective control rod being moved linearly by the user along its entire length and by the connecting rod, which is connected to the collective control rod at one end, rotating around the centre of the shaft by the same amount as the shaft. The shaft passes through the hole on the connection arm. The hole on the connection arm surrounds the shaft all around. When the shaft is rotated around its own axis, the connection arm rotates with the shaft. The output control rods connected to the connection arm move together with the connection arm.

[0009] In one embodiment of the invention, the mechanical mixing unit comprises a connection arm and an arm that are removably connected to the shaft so as to surround the shaft all around by means of the hole on them. The shaft passes through the opening on the connection arm and the arm. In one embodiment of the invention, the mechanical mixing unit comprises a primary arm that is directly connected to the shaft, and a secondary arm that can remain stationary while the shaft is moving since there is a bearing between it and the shaft. The secondary arm is attached to the connection arm in a removable manner from one end. The other end of the secondary arm is connected to the output control rod. When the collective control rod is pushed, only the connection arm that is directly connected to the shaft moves with the shaft.

[0010] In one embodiment of the invention, the mechanical mixing unit comprises a tertiary arm that is connected to the cyclic control rod at one end and to the primary arm at the other end, and is activated by triggering the cyclic control rod and thus provides the creation of cyclic movement. By triggering the cyclic control rod, the cyclic control rod moves the tertiary arm. The tertiary arm moves the primary arm to which it is connected, allowing the output control rods to move in a way that the aircraft performs pitching and rolling movements.

[0011] In one embodiment of the invention, the mechanical mixing unit moves the tertiary arm by moving the cyclic control rod located between the primary arm and the tertiary arm. The tertiary arm transmits the movement to the primary intermediate control rod. The primary arm transmission arm is connected to the primary intermediate control rod. The primary intermediate control rod transmits movement to the primary arm connected to it. The primary arms adjust the output control rods according to the movement of the aircraft determined by the user.

[0012] In one embodiment of the invention, the mechanical mixing unit comprises at least one secondary intermediate control rod that extends between the primary arm and the secondary arm, and allows pushing the output control rods connected to the secondary arm by moving between the primary arm and the secondary arm. The secondary intermediate control rod moves the output control rod forward by moving the primary arm together with the secondary arm.

[0013] The mechanical mixing unit system realised to achieve the aim of the present invention is shown in the attached figures, and of these figures;

[0014] Figure 1 is the schematic view of the control mechanism.

[0015] Figure 1 -a is the collective control inputs and outputs. Figure 1 -b is the pitch control inputs and outputs.

[0016] Figure 1 -c is the roll control inputs and outputs.

[0017] The parts in Figure 1 are numbered one by one and the equivalents of these numbers are given below.

[0018] 1. Mechanical Mixing Unit

[0019] 2. Body

[0020] 3. Collective Control Rod

[0021] 4. Cyclic Control Rod

[0022] 401. Pitching Control Rod

[0023] 402. Rolling Control Rod

[0024] 5. Output Control Rod

[0025] 6. Arm

[0026] 601. Primary Arm

[0027] 602. Secondary Arm

[0028] 603. Tertiary Arm

[0029] 7. Shaft

[0030] 8. Connection Arm

[0031] 9. Bearing

[0032] 10. Primary Intermediate Control Rod

[0033] 11. Secondary Intermediate Control Rod

[0034] The mechanical mixing unit comprises a body (2) which is the main structure of the rotary wing aircraft; at least one collective control rod (3) that is located within the body (2) and provides the creation of collective movement input by the user to control the body (2); at least one cyclic control rod (4) that is located within the body (2) and provides the creation of cyclic movement input by the user; more than one output control rods (5) that are connected to the collective control rod (3) and the cyclic control rod (4) and to which the collective control rod (3) and / or cyclic control rod (4) transfer movement; and at least one arm (6) which allows changing the direction and / or amount of movement transferred to the output control rods (5) by the collective control rod (3) and / or cyclic control rod (4).

[0035] The mechanical mixing unit (1 ) which is the subject of the invention comprises at least one shaft (7) that extends lengthwise within the body (2) and rotates around its own axis; at least one connection arm (8) that is connected to the shaft (7) and is triggered by the collective control rod (3), rotating together with the shaft (7) around the part to which it is connected to the shaft (7) and moving the output control rods (5) thus enabling the creation of the collective control movement; and at least one bearing (9) that is located between the shaft (7) and the arm (6), and ensures that the position of the arms (6) remains fixed relative to the shaft (7) during the movement of the shaft (7) and thus enables the collective and cyclic control movements to be transmitted to the output control rods (5) almost completely independently of each other.

[0036] The unit comprises at least one collective control rod (3) that is located on the body (2) of a rotary wing aircraft, provides the user with the command required to ensure that the body (2) performs the collective movement desired by the user and allows the user to create the collective movement input to control the body (2) on the vertical axis. The unit comprises at least one cyclic control rod (4) that is located within the body (2) and allows the cyclic movement command to be entered. The unit comprises more than one output control rods (5) that are connected to both the collective control rod (3) and the cyclic control rod (4) and transmit the movement received by the collective control rod (3) and the cyclic control rod (4) to the main rotor. The unit comprises at least one arm (6) that allows the direction and / or amount of movement transmitted by the collective control rod (3) and / or the cyclic control rod (4) to be changed. The arms (6) transmit the direction and amount of movement to the output control rods (5) as determined by the user. The arms (6) transmit the direction and amount of movement to the output control rods (5) as determined by the user. (Figure - 1 )

[0037] In one embodiment of the invention, the mechanical mixing unit (1 ) comprises at least one shaft (7) that can rotate around its own axis, and at least one connection arms (8) that is connected to it and moves together with it. The connection arms (8) enable the body (2) to perform a collective control movement by moving the output control rods (5). The connection arms (8) rotate together with the shaft (7). The primary arms (601 ) are located on the shaft (7). The unit comprises at least one bearing (9) that is located between the shaft (7) and the primary arms (601 ), and ensures that the primary arms (601 ) remain fixed relative to the shaft (7) when the shaft (7) moves. While the shaft (7) moves, the primary arms (601 ) remain fixed while the connection arms (8) rotate together with the shaft. In this way, the cyclic control movement is not affected by the collective control movement.

[0038] In one embodiment of the invention, the mechanical mixing unit (1 ) comprises output control rods (5) that move linearly with the rotation of the connection arm (8) connected to the collective control rod (3) together with the shaft (7) when the collective control rod (3) is moved linearly by the user in the direction it extends along its length. A collective control input is provided to the main rotor via the output control rods (5) that move together with the connection arms (8) (Figure 1 -a).

[0039] In one embodiment of the invention, the mechanical mixing unit (1 ) comprises primary arms (601 ) that are mounted on the shaft (7) by means of bearings (9), and secondary arms (602) that remain fixed on the shaft (7) while the primary arms (601 ) move, and are connected to the connection arms (8) at one end and to the output control rods (5) at the other. The secondary arms (602) are moved by the movement of the connection arms (8).

[0040] In one embodiment of the invention, the mechanical mixing unit (1 ) comprises connection arms (8) and primary arms (601 ) that have holes that surround the shaft (7) and are removably mounted on the shaft (7) in a way that is perpendicular to the direction in which the shaft (7) extends along the body (2). The connection arms (8) and primary arms (601 ) are connected to the shaft (7) from different parts and their movements do not affect each other.

[0041] In one embodiment of the invention, the mechanical mixing unit (1 ) comprises a primary intermediate control rod (10) that is connected between the primary arms (601 ) and the tertiary arms (603) and allows the movement to be transmitted from the tertiary arms (603) to the primary arms (601 ) by the user providing movement to the cyclic control rods (4), thus enabling the output control rods (5) to move in a direction and / or amount predetermined by the user.

[0042] In one embodiment of the invention, the mechanical mixing unit (1 ) comprises tertiary arms (603) to which the cyclic control rods (4) are connected, enabling the cyclic movement to be created by transmitting the movement of the cyclic control rods (4) to the primary arms (601 ) via the primary intermediate control rods (10). Cyclic control input is provided to the main rotor via the tertiary arms (603).

[0043] In one embodiment of the invention, the mechanical mixing unit (1 ) comprises secondary intermediate control rods (11 ) that are connected between the primary arms (601 ) and the secondary arms (602) and enable the transmission of cyclic and collective control movements.

[0044] In one embodiment of the invention, the mechanical mixing unit (1 ) comprises output control rods (5) that move in the same direction as the movement of the connection arms (8) when the collective control rod (3) is triggered by the user, enabling the transmission of collective control movement to the intermediate rotor.

[0045] In one embodiment of the invention, the mechanical mixing unit (1 ) comprises at least one pitch control rod (401 ) that is connected to the tertiary arms (603) and allows the body (2) to make a pitching movement, and at least one roll control rod (402) that is connected to the tertiary arms (603) and allows the body (2) to make a rolling movement. The relevant control inputs for the body (2) to be able to perform pitching and rolling movements are provided separately to the main rotor by the pitching control rod (401 ) and the rolling control rod (402).

[0046] In one embodiment of the invention, the mechanical mixing unit (1 ) comprises output control rods (5), two of which move in the same direction and the other in the opposite direction when the pitching control rod (401 ) is triggered by the user, allowing the body (2) to perform pitching movements. In this way, the output control rods (5) change position depending on the movement of the pitching control rod (401 ) (Figure 1 -b).

[0047] In one embodiment of the invention, the mechanical mixing unit (1 ) comprises output control rods (5), two of which move in the opposite direction to each other when the rolling control rod (402) is triggered by the user, while the other is fixed, allowing the body (2) to perform rolling movements. In this way, the output control rods (5) change position depending on the movement of the rolling control rod (402) (Figure 1 -c).

[0048] In one embodiment of the invention, the mechanical mixing unit (1 ) comprises a primary arm (601 ) or secondary arm (602) that are more than one and move simultaneously as a group. In this way, the necessary control inputs are made.

Claims

CLAIMS1. A mechanical mixing unit comprising a body (2) which is the main structure of the rotary wing aircraft; at least one collective control rod (3) that is located within the body (2) and provides the creation of collective movement input by the user to control the body (2); at least one cyclic control rod (4) that is located within the body (2) and provides the creation of cyclic movement input by the user; more than one output control rods (5) that are connected to the collective control rod (3) and the cyclic control rod (4) and to which the collective control rod (3) and / or cyclic control rod (4) transfer movement; and at least one arm (6) which allows changing the direction and / or amount of movement transferred to the output control rods (5) by the collective control rod (3) and / or cyclic control rod (4), characterised by at least one shaft (7) that extends lengthwise within the body (2) and rotates around its own axis; at least one connection arm (8) that is connected to the shaft (7) and is triggered by the collective control rod (3), rotating together with the shaft (7) around the part to which it is connected to the shaft (7) and moving the output control rods (5) thus enabling the creation of the collective control movement; and at least one bearing (9) that is located between the shaft (7) and the arm (6), and ensures that the position of the arms (6) remains fixed relative to the shaft (7) during the movement of the shaft (7) and thus enables the collective and cyclic control movements to be transmitted to the output control rods (5) almost completely independently of each other.

2. A mechanical mixing unit according to Claim 1 , characterised by output control rods (5) that move linearly with the rotation of the connection arm (8) connected to the collective control rod (3) together with the shaft (7) at the same amount when the collective control rod (3) is moved linearly by the user in the direction it extends along its length.

3. A mechanical mixing unit according to Claim 1 or Claim 2, characterised by at least one primary arm (601 ) that is mounted on the shaft (7) by means of bearings (9), and at least one secondary arm (602) that remains fixed on the shaft (7) while theprimary arm (601 ) moves, and is connected to the connection arm (8) at one end and to the output control rod (5) at the other.

4. A mechanical mixing unit according to any of the previous claims, characterised by connection arms (8) and primary arms (601 ) that have holes that surround the shaft (7) and are removably mounted on the shaft (7) in a way that is perpendicular to the direction in which the shaft (7) extends along the body (2).

5. A mechanical mixing unit according to Claim 4 or Claim 5, characterised by a primary intermediate control rod (10) that is connected between the primary arms (601 ) and the tertiary arms (603) and allows the movement to be transmitted from the tertiary arms (603) to the primary arms (601 ) by the user providing movement to the cyclic control rods (4), thus enabling the output control rods (5) to move in a direction and / or amount predetermined by the user.

6. A mechanical mixing unit according to any of the previous claims, characterised by tertiary arms (603) to which the cyclic control rods (4) are connected, enabling the cyclic movement to be created by transmitting the movement of the cyclic control rods (4) to the primary arms (601 ) via the primary intermediate control rods (10).

7. A mechanical mixing unit according to Claims 4 to 6, characterised by secondary intermediate control rods (11 ) that are connected between the primary arms (601 ) and the secondary arms (602) and enable the transmission of cyclic and collective control movements.

8. A mechanical mixing unit according to any of the previous claims, characterised by output control rods (5) that move in the same direction as the movement of the connection arms (8) when the collective control rod (3) is triggered by the user, enabling the transmission of collective control movement to the intermediate rotor.

9. A mechanical mixing unit according to Claims 4 to 8, characterised by at least one pitch control rod (401 ) that is connected to the tertiary arms (603) and allows the body (2) to make a pitching movement, and at least one roll control rod (402) that is connected to the tertiary arms (603) and allows the body (2) to make a rolling movement.

10. A mechanical mixing unit according to Claim 9, characterised by output control rods (5), two of which move in the same direction and the other in the opposite direction when the pitching control rod (401 ) is triggered by the user, allowing the body (2) to perform pitching movements.

11. A mechanical mixing unit according to Claim 9 or Claim 10, characterised by output control rods (5), two of which move in the opposite direction to each other when the rolling control rod (402) is triggered by the user, while the other is fixed, allowing the body (2) to perform rolling movements.

12. A mechanical mixing unit according to Claim 4 or Claim 11 , characterised by a primary arm (601 ) or secondary arm (602) that are more than one and move simultaneously as a group.

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