A test fuel tank inverted flight counter

Abstract

The present invention discloses a test oil tank inverted flight counter, comprising a housing, a mounting plate, a power trigger mechanism, a power transmission mechanism, an actuator, a position locking mechanism and a mechanical counting device, wherein the housing is provided with an actuator and a position locking mechanism; the actuator comprises a counting actuator and an unlocking actuator, wherein the counting actuator is used to trigger the mechanical counting device to count, the unlocking actuator is used to reset and unlock the position locking mechanism, and the position locking mechanism is used to lock the counting actuator after the mechanical counting device counts once, a power trigger mechanism is provided on one side of the housing, and a power transmission mechanism is provided on the upper and lower parts of the housing respectively. Compared with the prior art, the present invention omits the data processing and data analysis links, and can automatically, quickly, accurately and intuitively read the number of inverted flights (flips) of the oil tank, while ensuring the effectiveness and accuracy of the counting, greatly improving the work efficiency and reducing the data acquisition cost.

Description

Technical Field

[0001] The invention belongs to the field of aviation manufacturing, and specifically relates to a ground negative overload test of a fuel system, and a counting mechanism for inverted flight and similar tank flipping actions of a test fuel tank of an aircraft. Background Art

[0002] In the ground negative overload test of the fuel system of aircraft, model aircraft and other aircraft, the test fuel tank (hereinafter referred to as the fuel tank) needs to correctly perform the following actions as required: maintain upright flight - enter inverted flight - maintain inverted flight - exit inverted flight - maintain upright flight, that is, the fuel tank completes the following corresponding actions: upright (0°) - flip (0°→180°) - maintain inverted (180°) - flip (180°→0°) - maintain upright (0°). Only when the fuel tank completes the above whole set of actions once can it be determined that the inverted flight action is successful. In the actual high-frequency inverted flight test, the existing technology often collects computer data through angle sensors, and determines the number of successful inverted flight actions after manual analysis. The amount of data read, analyzed and processed in this process is often large, and the time consumed is also relatively long. Summary of the invention

[0003] In order to save data processing and data analysis, the present invention designs an aircraft ground test fuel tank inversion counter to automatically, quickly, accurately and intuitively read out the number of inversions (flips) of the fuel tank.

[0004] Technical solution of the present invention:

[0005] A test tank inverted flight counter comprises a shell, a mounting plate, a power trigger mechanism, a power transmission mechanism, an actuator, a position locking mechanism and a mechanical counting device, wherein the actuator and the position locking mechanism are arranged inside the shell; the actuator comprises a counting actuator and an unlocking actuator, wherein the counting actuator is used to trigger the mechanical counting device to count; the position locking mechanism is used to lock the counting actuator after triggering the mechanical counting device to count once; the unlocking actuator is used to reset and unlock the position locking mechanism in preparation for the next counting; a power trigger mechanism is arranged on one side of the shell, and the power transmission mechanism is arranged on the upper and lower parts of the shell respectively, the power trigger mechanism can provide corresponding execution power to the power transmission mechanism according to the flight state, and the power transmission mechanism is used to receive the execution power provided by the power trigger mechanism and transmit it to the corresponding actuator to perform the corresponding action.

[0006] Furthermore, the power trigger mechanism includes a limiting guide rail and a trigger ball. The trigger ball is arranged in the limiting guide rail. The trigger ball can move along the limiting guide rail under the action of gravity to provide impact force for the power transmission mechanism.

[0007] Furthermore, the interior of the limiting guide rail has a limiting transition zone.

[0008] Furthermore, the position-limiting guide rail includes straight sections at both ends and two right-angle turning sections, and a position-limiting transition zone is between the two right-angle turning sections.

[0009] Furthermore, the power transmission mechanism includes a first lever and a second lever, and the upper part and the lower part of the shell are respectively provided with a lever bracket, and the first lever and the second lever are respectively hinged to the corresponding lever bracket.

[0010] Further, the counting actuator includes a counting contact rod, a counting contact rod is vertically and elastically installed on one side of the shell, the upper end of the counting contact rod extends out of the upper part of the shell and is provided with an upper contact drivingly connected to the first lever, the lower end of the counting contact rod extends out of the lower part of the shell and is provided with a lower contact drivingly connected to the mechanical counting device, and a wedge-shaped limit block is provided on the rod body of the counting contact rod;

[0011] The unlocking actuator comprises a reset contact rod, one side of the inner bottom of the shell is elastically mounted with the reset contact rod, one end of the reset contact rod extends out of the shell and is provided with a reset contact drivingly connected to the second lever.

[0012] Furthermore, the position locking mechanism includes a sliding buckle, a sliding buckle is elastically installed laterally inside the shell, a wedge-shaped guide surface matching the wedge-shaped limit block is provided on one side of the sliding buckle, and an unlocking groove for inserting the reset contact rod to unlock is provided at the bottom of the sliding buckle, and the unlocking groove has a wedge-shaped unlocking surface matching the head of the reset contact rod.

[0013] Furthermore, when the wedge-shaped limit block contacts the wedge-shaped guide surface, the lower contact and the mechanical counting device are in a non-contact state; when the wedge-shaped limit block passes over the wedge-shaped guide surface downward, the lower contact and the mechanical counting device are in a pressed state.

[0014] Compared with the prior art, the present invention omits the data processing and data analysis steps, and automatically, quickly, accurately and intuitively reads the number of times the fuel tank flies upside down (flips). By setting a power trigger mechanism, the power transmission mechanism can be provided with corresponding execution power according to the flight status, and the whole process does not require energy consumption. While ensuring the effectiveness and accuracy of the counting, it greatly improves the work efficiency and reduces the cost of data acquisition. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a preferred embodiment of the present invention when the oil tank is kept upright;

[0016] Figure 2 yes Figure 1 A partial enlarged view of

[0017] Figure 3It is a structural schematic diagram of a preferred embodiment of the present invention when the fuel tank enters the inverted flight process and flips counterclockwise to a 90° position; or when the fuel tank exits the inverted flight process and flips clockwise to a 90° position;

[0018] Figure 4 It is a structural schematic diagram of a preferred embodiment of the present invention when the fuel tank is in a 90° to 180° counterclockwise rotation during the inverted flight process; or when the fuel tank is in a 90° to 180° clockwise rotation during the inverted flight process;

[0019] Figure 5 It is a schematic diagram of the structure when the fuel tank is kept inverted;

[0020] In the figure: counting contact rod 1, sliding buckle 2, reset contact rod 3, mechanical counting device 4, first lever 5, buckle spring 6, trigger ball 7, second lever 8, limiting guide rail 9, lever bracket 10, upper contact 11, lower contact 12, wedge-shaped limiting block 13, wedge-shaped guide surface 21, unlocking groove 22, wedge-shaped unlocking surface 221, reset contact 31, limiting transition zone 91, straight section 92, right-angle turning section 93, shell 100, mounting plate 200. DETAILED DESCRIPTION

[0021] The present invention can be further described by the following embodiments. However, the scope of the present invention is not limited to the following embodiments.

[0022] Example 1: See Figure 1 —— Figure 5 A test tank inverted flight counter shown in the figure includes a shell 100, a mounting plate 200, a power trigger mechanism, a power transmission mechanism, an actuator, a position locking mechanism and a mechanical counting device 4, wherein the shell 100 is provided with an actuator and a position locking mechanism; the actuator includes a counting actuator and an unlocking actuator, wherein the counting actuator is used to trigger the mechanical counting device 4 to perform counting; the position locking mechanism is used to lock the counting actuator after triggering the mechanical counting device 4 to perform counting once; the unlocking actuator is used to reset and unlock the position locking mechanism in preparation for the next counting; a power trigger mechanism is provided on one side of the shell 100, and a power transmission mechanism is provided on the upper and lower parts of the shell 100 respectively, wherein the power trigger mechanism can provide corresponding execution power to the power transmission mechanism according to the flight state, and the power transmission mechanism is used to receive the execution power provided by the power trigger mechanism and transmit it to the corresponding actuator to perform corresponding actions.

[0023] Furthermore, the power trigger mechanism includes a limiting guide rail 9 and a trigger ball 7. The trigger ball 7 is arranged in the limiting guide rail 9. The trigger ball 7 can move along the limiting guide rail 9 under the action of gravity to provide impact force for the power transmission mechanism.

[0024] Furthermore, the interior of the limit guide rail 9 has a limit transition zone 91, and the limit transition zone 91 can be designed according to the actual inverted flight angle control error or accuracy requirement, so that only after the inversion (angle) is effectively completed, can the trigger ball 7 fall accurately, and provide the power transmission mechanism with corresponding execution power to achieve effective counting and unlocking; the mechanical counting device 4 in this embodiment is a counting mechanism commonly used on the market, and its structure is not repeated here; preferably, in this embodiment, the limit guide rail 9 includes straight sections 92 at both ends and two right-angle turning sections 93, and the limit transition zone 91 is between the two right-angle turning sections 93. As long as the inversion and upright placement are not in place, the trigger ball 7 cannot hit the corresponding lever under the restriction of the limit guide rail 9, resulting in counting and unlocking actions, thereby ensuring the effectiveness and accuracy of the counting.

[0025] Furthermore, the power transmission mechanism includes a first lever 5 and a second lever 8 , and lever brackets 10 are respectively provided at the upper and lower parts of the housing 100 , and the first lever 5 and the second lever 8 are respectively hinged to the corresponding lever brackets 10 .

[0026] Further, the counting actuator includes a counting contact rod 1, and a counting contact rod 1 is vertically and elastically installed on one side of the housing 100. The upper end of the counting contact rod 1 extends out of the upper part of the housing 100 and is provided with an upper contact 11 drivingly connected to the first lever 5. The lower end of the counting contact rod 1 extends out of the lower part of the housing 100 and is provided with a lower contact 12 drivingly connected to the mechanical counting device 4. The rod body of the counting contact rod 1 is provided with a wedge-shaped limit block 13;

[0027] The unlocking actuator includes a reset contact rod 3 , which is elastically mounted on one side of the inner bottom of the housing 100 . One end of the reset contact rod 3 extends out of the housing 100 and is provided with a reset contact 31 drivingly connected to the second lever 8 .

[0028] Furthermore, the position locking mechanism includes a sliding buckle 2, and the sliding buckle 2 is elastically installed laterally inside the shell 100. One side of the sliding buckle 2 is provided with a wedge-shaped guide surface 21 matching the wedge-shaped limit block 13, and the bottom of the sliding buckle 2 is provided with an unlocking groove 22 for the reset contact rod 3 to be inserted and unlocked. The unlocking groove 22 has a wedge-shaped unlocking surface 221 that cooperates with the rod head of the reset contact rod 3. The guiding effect of the wedge-shaped unlocking surface 221 is used to convert the force received by the reset contact rod 3 into an unlocking force for the lateral movement of the sliding buckle 2.

[0029] Furthermore, when the wedge-shaped limit block 13 contacts the wedge-shaped guide surface 21, the lower contact 12 and the mechanical counting device 4 are in a non-contact state; when the wedge-shaped limit block 13 passes over the wedge-shaped guide surface 21 downward, the lower contact 12 and the mechanical counting device 4 are in a pressed state. Specifically, when the aircraft is flying, the trigger ball 7 will hit one end of the second lever 8, and the other end of the second lever 8 will hit the reset contact 31. The end of the reset contact rod 3 away from the reset contact 31 will extend into the release groove to move the sliding buckle 2 to the left, so that the counting contact rod drives the wedge-shaped limit block 13 to reset upward and contact the wedge-shaped guide surface 21 under the action of the spring force, thereby realizing the reset after pressing the mechanical counting device 4, that is, the lower contact 12 and the mechanical counting device 4 are in a "pop-open state" and are ready for the next counting action.

[0030] Furthermore, in this embodiment, in order to prevent sparks and other dangerous factors caused by collision, the first lever 5, the second lever 8, the trigger ball 7 and each contact are designed to be made of non-ferrous metal materials such as copper and aluminum.

[0031] When in use, the test tank inverted flight counter of the present invention can be fixed on the test tank for counting through the mounting plate 200, and the process of the tank rotating from the initial upright position to the inverted position is as follows: Figure 1 →Attached Figure 3 →Attached Figure 4 →Attached Figure 5 , the process of exiting the inverted position and returning to the upright position is as follows: Figure 5 →Attached Figure 4 →Attached Figure 3 →Attached Figure 1 .

[0032] in Figure 1 It indicates the upright position of the fuel tank before the start of inverted flight. When it is rotated from the initial upright position to the inverted position (the inverted position is as follows Figure 5 As shown in the figure), the trigger ball 7 will fall along the limit guide rail 9 under the action of gravity and drive the first lever 5 to rotate, and act on the upper contact 11 of the counting contact rod 1, so that the counting contact rod 1 moves toward the counting device 4, and the lower contact 12 presses the paddle of the mechanical counting device 4, so that the counting mechanism counts once. During the movement of the contact rod 1 toward the counting device 4, the sliding buckle 2 will move to the right under the action of the wedge-shaped limit block 13 and compress the buckle spring 6 until the wedge-shaped limit block 13 passes over the wedge-shaped guide surface 21, and the buckle spring 6 will reset and push the sliding buckle 2 to move left. At this time, the wedge-shaped limit block 13 is pressed and locked by the sliding buckle 2 and cannot slide up and down temporarily, so that the paddle of the mechanical counting device 4 is pressed and temporarily remains in a pressed state. After being pressed, the mechanical counting device 4 counts and displays an increase once. Only by releasing the pressure on the mechanical counting device 4 can the next pressing count be prepared.

[0033] When exiting inverted flight, that is, when the counter reaches the Figure 5 →Attached Figure 4 →Attached Figure 3 →Attached Figure 1 , arrive at the nearby Figure 1 After the effective forward flight position, Figure 1 As shown, the trigger ball 7 can fall along the limit guide rail 9 under the action of gravity and drive the second lever 8 to rotate to act on the reset contact rod 3. The end of the reset contact rod 3 away from the reset contact 31 will extend into the tripping groove to make the sliding buckle 2 move to the left and compress the buckle spring 6 again, so that the counting contact rod drives the wedge-shaped limit block 13 to reset upward and contact the wedge-shaped guide surface 21 under the action of the spring force. The previous locking fails, ending the pressing and holding action of the last count. The lower contact 12 is in a non-contact state with the mechanical counting device 4, achieving a complete oil The box flip count, if due to various reasons it is not flipped into place, that is, it cannot effectively return to the normal flying position, the trigger ball 7 cannot cross the right-angle turn section 93, and the press-and-hold action to end the last count cannot be achieved; by observing whether the lower contact 12 is disengaged from the paddle of the mechanical counting device 4, it can be determined whether the display number of the mechanical counting device 4 is the last successful valid flip number. If it is disengaged, it indicates that the display number of the mechanical counting device 4 is the valid flip number. If it is not disengaged, it indicates that the valid flip number is the display number value of the mechanical counting device 4 minus 1.

[0034] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0035] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A test tank inverted flight counter, characterized in that: The invention comprises a housing, a mounting plate, a power trigger mechanism, a power transmission mechanism, an actuator, a position locking mechanism and a mechanical counting device. The housing is provided with an actuator and a position locking mechanism. The actuator comprises a counting actuator and an unlocking actuator. The counting actuator is used to trigger the mechanical counting device to count. The position locking mechanism is used to lock the counting actuator after the mechanical counting device is triggered to count once. The unlocking actuator is used to reset and unlock the position locking mechanism to prepare for the next counting. A power trigger mechanism is provided on one side of the housing. The upper and lower parts of the housing are provided with power trigger mechanisms. A force transmission mechanism, a power trigger mechanism can provide corresponding execution power to the power transmission mechanism according to the flight state, and the power transmission mechanism is used to receive the execution power provided by the power trigger mechanism and transmit it to the corresponding execution mechanism to execute the corresponding action; the power trigger mechanism includes a limit guide rail and a trigger ball, and the trigger ball is arranged in the limit guide rail. The trigger ball can move along the inside of the limit guide rail under the action of gravity to provide impact force for the power transmission mechanism; the inside of the limit guide rail has a limit transition zone; the limit guide rail includes straight sections at both ends and two right-angle turning sections, and the limit transition zone is between the two right-angle turning sections.

2. A test fuel tank inverted flight counter according to claim 1, characterized in that: The power transmission mechanism comprises a first lever and a second lever. The upper part and the lower part of the shell are respectively provided with lever brackets. The first lever and the second lever are respectively hinged to the corresponding lever brackets.

3. A test tank inverted flight counter according to claim 2, characterized in that: The counting actuator includes a counting contact rod, a counting contact rod is vertically and elastically installed on one side of the housing, the upper end of the counting contact rod extends out of the upper part of the housing and is provided with an upper contact drivingly connected to the first lever, the lower end of the counting contact rod extends out of the lower part of the housing and is provided with a lower contact drivingly connected to the mechanical counting device, and a wedge-shaped limit block is provided on the rod body of the counting contact rod; The unlocking actuator comprises a reset contact rod, one side of the inner bottom of the shell is elastically mounted with the reset contact rod, one end of the reset contact rod extends out of the shell and is provided with a reset contact drivingly connected to the second lever.

4. A test tank inverted flight counter according to claim 3, characterized in that: The position locking mechanism includes a sliding buckle, a sliding buckle is elastically installed laterally inside the shell, a wedge-shaped guide surface matching the wedge-shaped limit block is provided on one side of the sliding buckle, an unlocking groove for inserting a reset contact rod to unlock is provided at the bottom of the sliding buckle, and the unlocking groove has a wedge-shaped unlocking surface matching the head of the reset contact rod.

5. A test fuel tank inverted flight counter according to claim 4, characterized in that: When the wedge-shaped limit block contacts the wedge-shaped guide surface, the lower contact and the mechanical counting device are in a non-contact state; when the wedge-shaped limit block passes over the wedge-shaped guide surface downward, the lower contact and the mechanical counting device are in a pressed state.

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