External field detection tool for air bleed valve of helicopter engine

Abstract

The utility model discloses a helicopter engine bleed valve outer field detection tool comprising a pressure sensor, a terminal arranged in a cockpit and in communication connection with the pressure sensor, and a positioning assembly I used for fixing the terminal; the positioning assembly II is used for fixing the pressure sensor; wherein the terminal is provided with a display screen; and a probe of the pressure sensor is arranged at an airflow outlet of the air bleed valve of the helicopter engine through a positioning assembly II. According to the technical scheme of the utility model, the air flow at the outlet of the air bleed valve is detected through the pressure sensor, and the pressure signal is transmitted to the terminal in the cockpit, so that the convenience of the detection of the air bleed valve is improved. The opening and closing time and opportunity of the air bleed valve of the helicopter engine are accurately monitored by utilizing the timeliness of electric signal propagation, and the test run and flight safety of the helicopter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation equipment, and more specifically, to an off-site detection tool for a helicopter engine bleed valve. Background Art

[0002] The bleed valve of a helicopter engine is an important component to prevent engine surge, also known as the anti-surge system, and the timing of opening and closing the bleed valve directly affects the engine's performance. If the bleed valve is closed early, the compressor intake volume will not meet the compressor speed requirement, causing a certain amount of back pressure to form in front of the compressor, causing the air pressure in front of the compressor to be turbulent, and the airflow will oscillate along the compressor axis with low frequency and high amplitude, causing strong vibration of the working parts, producing continuous low whistling sounds, and severe cases will be accompanied by blasting sounds, so it is called the engine "blasting" phenomenon, so the accurate detection of the opening and closing timing of the helicopter engine bleed valve is an important part of the test inspection. Usually, the helicopter engine bleed valve detection is composed of test personnel, ground gesture communication personnel, and bleed valve airflow monitoring personnel standing on the external fuel tank. The airflow from the helicopter's bleed valve is high-temperature, which can easily cause burns to the monitoring personnel. There are no safety protection measures at the monitoring position, so there is a risk of falling. In addition, due to the large number of people involved, the gesture transmission delay is long (the calculated delay time is about 2 seconds), and the test personnel have to monitor the gestures and engine speed at the same time, which can easily cause inaccurate opening and closing time of the bleed valve, affecting the test safety of the helicopter and flight safety. Utility Model Content

[0003] An object of the present invention is to solve the above-mentioned problems and / or disadvantages and to provide advantages which will be described below.

[0004] In order to achieve these purposes and other advantages of the utility model, a helicopter engine bleed valve field detection tool is provided, including: a pressure sensor, and also including: a terminal arranged in the cockpit and connected to the pressure sensor for communication:

[0005] Positioning assembly I for fixed terminal;

[0006] Positioning assembly II for fixing the pressure sensor;

[0007] Wherein, the terminal has a display screen;

[0008] The probe of the pressure sensor is arranged at the air flow outlet of the helicopter engine exhaust valve through the positioning component II.

[0009] Preferably, the positioning assembly I comprises: a flexible support member, and a clamp I disposed at one end of the flexible support member;

[0010] The other end of the flexible support is connected to the terminal.

[0011] Preferably, the positioning assembly II comprises: a connecting rod mechanism, and a clamp II arranged at one end of the connecting rod mechanism;

[0012] The other end of the connecting rod mechanism is connected to the pressure sensor.

[0013] The utility model includes at least the following beneficial effects: the airflow at the outlet of the bleed valve is detected by a pressure sensor, and the pressure signal is transmitted to the terminal in the cockpit, thereby improving the convenience of bleed valve detection; the timeliness of electrical signal transmission is utilized to accurately monitor the opening and closing timing of the helicopter engine bleed valve, thereby improving the test run and flight safety of the helicopter.

[0014] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an outfield inspection tool for a helicopter engine bleed valve in one embodiment of the utility model;

[0016] Figure 2 It is a structural schematic diagram of a positioning assembly II for an outfield inspection tool for a helicopter engine bleed valve in one embodiment of the utility model.

[0017] Markings in the figure: 1. Terminal, 11. Groove, 2. Positioning component I, 21. Flexible support, 22. Clamp I, 23. Block, 3. Pressure sensor, 4. Positioning component II, 41. Connecting rod mechanism, 42. Clamp II, 421. Upper clamp block, 4211. "V"-shaped groove, 422. Lower clamp block, 4221. Screw hole II, 423. Screw, 43. Clamp block, 431. "U"-shaped groove, 432. Arc groove, 433. Bolt, 434. Screw hole I, 5. High temperature resistant wire. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0019] It should be understood that terms such as “having”, “including” and “comprising” used herein do not recite the existence or addition of one or more other elements or combinations thereof.

[0020] It should be noted that in the description of the present invention, the orientation or position relationship indicated by the term is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present utility model, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0022] In addition, in the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0023] Example 1

[0024] A helicopter engine bleed valve field testing tool, the structure of which is as follows Figure 1-2 As shown, it includes: a pressure sensor 3, and also includes: a terminal 1 arranged in the cockpit and connected to the pressure sensor 3 for communication:

[0025] A positioning component I2 of a fixed terminal 1;

[0026] A positioning assembly II 4 for fixing the pressure sensor 3;

[0027] Wherein, the terminal 1 has a display screen;

[0028] The probe of the pressure sensor 3 is arranged at the air flow outlet of the helicopter engine bleed valve through the positioning component II4.

[0029] Working principle: The terminal 1 and the pressure sensor 3 are respectively fixed to the instrument panel of the helicopter cockpit and the bleed valve of the helicopter engine through the positioning component I2 and the positioning component II4. The terminal 1 and the pressure sensor 3 are connected by a high-temperature resistant wire 5 to prevent them from being damaged under high temperature. When working, the pressure sensor 3 transmits the detected air pressure information to the terminal 1 through the high-temperature resistant wire 5, and the driver directly judges and operates the helicopter engine bleed valve to open and close according to the pressure value displayed on the terminal 1.

[0030] The airflow at the outlet of the bleed valve is detected by the pressure sensor 3, and the pressure signal is transmitted to the terminal 1 in the cockpit, so as to improve the convenience of the bleed valve detection and avoid the unsafe factors of the personnel's previous standing position and the harm of high-temperature airflow to personnel; by utilizing the timeliness of the electrical signal transmission, the opening and closing timing of the helicopter engine bleed valve is accurately monitored, so as to improve the test run and flight safety of the helicopter and better ensure the performance status of the helicopter.

[0031] Example 2

[0032] This embodiment 2 is a preferred embodiment of the present invention, and its specific structure is as follows Figure 1 As shown, it discloses the following improvements based on the embodiment 1: the positioning assembly Ⅰ2 comprises: a flexible support member 21, and a clamp Ⅰ22 arranged at one end of the flexible support member 21;

[0033] The other end of the flexible support member 21 is connected to the terminal 1 .

[0034] In actual application, the flexible support member 21 can be bent and deformed at will to adjust to the required shape, and maintain the deformed shape to support the terminal 1; a card block 23 is provided at the other end of the flexible support member 21, and grooves 11 that match the inner width of the card block 23 are provided on both sides of the lower end of the terminal 1, which can prevent the terminal 1 from moving below the card block 23 during use and causing the terminal 1 to fall off; an elastic member is provided at one end of the clamp Ⅰ22, so that the clamping end of the clamp Ⅰ22 can be opened and closed and remain clamped to each other.

[0035] When in use, the components in the helicopter cockpit are clamped by the clamp Ⅰ22, so that the terminal 1 is fixed on the instrument panel of the helicopter cockpit, which is convenient for the test personnel to watch; the clamp Ⅰ22 and the flexible support member 21 can be set to fix and position the terminal 1 together, and it is also convenient to remove it. The flexible support member 21 can be bent and deformed at will to adjust to the required shape, which is conducive to its adaptive adjustment to different helicopter models and different clamping positions of the clamp Ⅰ22, ensuring that the terminal 1 is placed in a position that is easy to observe.

[0036] Example 3

[0037] This embodiment 3 is a preferred embodiment of the present utility model, and the specific structure is as follows Figure 1-2 As shown, it discloses the following improvements based on the embodiment 1: the positioning assembly II4 comprises: a connecting rod mechanism 41, and a clamp II42 arranged at one end of the connecting rod mechanism 41;

[0038] The other end of the connecting rod mechanism 41 is connected to the pressure sensor 3 .

[0039] In practical applications, the connecting rod mechanism 41 is composed of a plurality of connecting rods that can rotate with each other, and the connecting rods can be folded, deformed and adjusted; a clamp block 43 is provided at the connecting end of the connecting rod mechanism 41 and the pressure sensor 3, a "U"-shaped groove 431 is provided at the end of the clamp block 43, and an arc groove 432 for fixing the pressure sensor 3 is provided at the bottom of the "U"-shaped groove 431, and a bolt 433 is provided at one end of the "U"-shaped groove 431 away from the bottom of the groove, and the bolt 433 passes through the through hole on one side of the "U"-shaped groove 431 and is fixed in the screw hole I 434 on the other side thereof; the clamp II 42 is composed of The upper clamp block 421, the lower clamp block 422 and the screw rod 423 are composed; one end of the upper clamp block 421 and the lower clamp block 422 are connected to each other at an adjustable angle; the screw rod 423 passes through the upper clamp block 421, and one end is fixed in the screw hole II4221 of the lower clamp block 422, and the opening and closing angles of the upper clamp block 421 and the lower clamp block 422 can be adjusted by rotating the screw rod 423; the two opposite inner sides of the upper clamp block 421 and the lower clamp block 422 are provided with a "V"-shaped groove 4211, so that the clamp II42 can be more firmly fixed to the predetermined position outside the helicopter when clamped.

[0040] When in use, the outside of the helicopter is clamped by the clamp II 42, and the shape of the connecting rod mechanism 41 is adjusted so that the pressure sensor 3 is placed at the airflow outlet of the helicopter engine exhaust valve to detect the airflow pressure; the connecting rod mechanism 41 and the clamp II 42 can jointly fix and position the pressure sensor 3, and also facilitate its removal. The connecting rod mechanism 41 can be folded and deformed to adjust it, which is beneficial for it to adapt to different helicopter models and different clamping positions of the clamp II 42 to ensure that the placement position of the pressure sensor 3 is not affected.

[0041] The above solutions are only an illustration of a preferred example, but are not limited thereto. When implementing the present utility model, appropriate replacement and / or modification can be performed according to user needs.

[0042] The number of devices and processing scales described here are used to simplify the description of the utility model. Applications, modifications and variations of the utility model are obvious to those skilled in the art.

[0043] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. A helicopter engine bleed valve field test tool, comprising: The pressure sensor is characterized by further comprising: a terminal arranged in the cockpit and connected to the pressure sensor for communication: Positioning assembly I for fixed terminal; Positioning assembly II for fixing the pressure sensor; Wherein, the terminal has a display screen; The probe of the pressure sensor is arranged at the air flow outlet of the helicopter engine exhaust valve through the positioning component II.

2. The helicopter engine bleed valve field testing tool as claimed in claim 1, characterized in that: The positioning assembly I comprises: a flexible support member, and a clamp I arranged at one end of the flexible support member; The other end of the flexible support is connected to the terminal.

3. The helicopter engine bleed valve field testing tool as claimed in claim 1, characterized in that: The positioning assembly II includes: a connecting rod mechanism, and a clamp II arranged at one end of the connecting rod mechanism; The other end of the connecting rod mechanism is connected to the pressure sensor.

Images