A special tool for helicopter oil sampling

Abstract

The utility model relates to a kind of special tool for helicopter oil sampling, including first sampling tool and second sampling tool, first sampling tool includes first glass tube, first propelling pipe, first handle, first movable press bar and first piston, first glass tube input end slidingly provided with first propelling pipe, the input end of first propelling pipe is detachably connected with nylon suction tube, the output end of first propelling pipe extends to first glass tube inside, the output end of the rear end of first propelling pipe is provided with first piston, through hole, which is communicated with first propelling pipe, is formed in first piston, the output end of the rear end of first glass tube is detachably connected with drainage tube, the output end of drainage tube is detachably connected with sample bottle;The utility model provides first sampling tool and second sampling tool two different structures.First sampling tool is drawn into the oil pool inside helicopter engine, air starter and auxiliary power device by nylon suction tube to suck oil, meet the oil sampling demand of these parts.

Description

Technical Field

[0001] This utility model relates to the field of helicopter maintenance technology, specifically a special tooling for helicopter oil sampling. Background Technology

[0002] As helicopters are a commonly used flight vehicle in military operations, the increased frequency of flight operations and the extended mission cycles have become the norm. This trend has directly led to increasingly frequent scheduled maintenance and inspections of helicopters. Among various scheduled maintenance procedures, periodic inspections with 50-hour and 100-hour cycles are particularly important. The sampling and testing of various critical system fluids (such as engine oil, transmission oil, and hydraulic oil) is a core component of maintenance work and the cornerstone of quality control.

[0003] Traditional sampling methods (such as using simple tubing, syringes, etc.) are cumbersome and time-consuming, and are particularly inconvenient to implement in the space-constrained cabin environment, becoming a bottleneck restricting the improvement of overall aircraft maintenance efficiency. Existing methods are prone to sample contamination (such as mixing in air or impurities) or oil spillage, which not only directly affects the accuracy of test results and causes the risk of misjudgment, but may also contaminate parts or the working environment, bringing safety hazards and even affecting equipment reliability assessment. Therefore, this utility model provides a special tooling for helicopter oil sampling. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a special tooling for helicopter oil sampling, which addresses the above-mentioned shortcomings.

[0005] To solve the above technical problems, the present invention adopts the following technical solution:

[0006] A special tooling for sampling helicopter oil includes a first sampling tooling and a second sampling tooling. The first sampling tooling includes a first glass tube, a first propulsion tube, a first handle, a first movable pressure rod, and a first piston. The first propulsion tube is slidably disposed at the input end of the first glass tube. A nylon suction tube is detachably connected to the input end of the first propulsion tube. The nylon suction tube is used to insert the input end into the oil sump of the helicopter's engine, air starter, and auxiliary power unit to draw oil. The output end of the first propulsion tube extends to the inside of the first glass tube. A first piston is disposed at the output end of the rear end of the first propulsion tube, with its outer edge completely fitting the inner cavity of the first glass tube. The first piston has a through hole communicating with the first propulsion tube. A drainage tube is detachably connected to the output end of the rear end of the first glass tube. The output end of the drainage tube is detachably connected to... A sample bottle is attached. Spring plugs are provided at the connection between the first push tube and the nylon pipette and at the connection between the first glass tube and the drainage tube. A first handle is fixedly installed on the outside of the first glass tube. The end of the first handle away from the first glass tube is hinged to the lower end of the first movable pressure rod. The upper end of the first movable pressure rod is hinged to the first push tube, and the hinged end is clearance-fitted with the outside of the first push tube. When the upper end of the first movable pressure rod rotates towards the first handle, it can push the first push tube and the first piston to move to the rear end to squeeze and expel the air in the cavity of the first glass tube. When the upper end of the first movable pressure rod rotates away from the first handle, it can pull the first push tube and the first piston to move to the front end to generate negative pressure in the cavity of the first glass tube. The nylon pipette can draw oil through negative pressure. Both spring plugs are used to ensure that the oil can only flow unidirectionally from the nylon pipette to the sample bottle.

[0007] Furthermore, the nylon straw is a three-section straw, with the diameter of the connecting section where the nylon straw connects to the first glass tube being 10mm, the diameter of the middle connecting section being 6mm, and the diameter of the oil suction section being 4mm.

[0008] Furthermore, the second sampling fixture includes a second glass tube, a second propulsion tube, a second handle, a second movable pressure rod, and a second piston. The structure of the second sampling fixture is consistent with that of the first sampling fixture. The input end of the front end of the second glass tube is detachably connected to a connecting tube. The input end of the front end of the connecting tube is provided with an oil drain adapter. The oil drain adapter is used to connect to the magnetic chip plug of the oil drain port of the helicopter gearbox. A pin extending to the inside of the connector is horizontally placed inside the second glass tube. The output end of the rear end of the second propulsion tube is detachably connected to a drainage tube and a sample bottle in sequence. The second movable pressure rod is used to push the second propulsion tube and the second piston to move forward, thereby pushing the pin forward to open the magnetic chip detection port of the oil port. The oil can automatically flow into the second glass tube, the drainage tube, and the sample bottle under the action of gravity.

[0009] Furthermore, the first propulsion tube is a metal tube, and the drainage tube is a plastic flexible tube.

[0010] Furthermore, the ejector pin is a metal ejector pin.

[0011] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0012] This invention utilizes the atmospheric pressure of a liquid syringe as its basic principle to design a special tooling for sampling lubricating oil from helicopter engines, auxiliary power units, main reducers, intermediate reducers, and tail reducers. By connecting the sampling port to a sample bottle, sampling can be completed quickly and easily by a single operator. This ensures that the lubricating oil sampling and analysis is required for the helicopter's scheduled maintenance every 50 hours and 100 hours, preventing oil contamination, prolonged sampling time, and oil spillage during the sampling process. It enables rapid completion of oil sampling, ensuring the smooth completion of various combat missions.

[0013] The sampling interface is fully compatible with the machine interface, and there are no external contaminants during the sampling process. The sampling work can be completed by one person carrying only one sampling tool, which greatly improves the efficiency of lubricating oil sampling and ensures that the lubricating oil of each sampling machine can be sampled within the time limit specified in the maintenance regulations.

[0014] The spring design on the handle saves effort and improves sampling efficiency, ensuring that one person can complete the task with just one hand.

[0015] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a front view of the first sampling fixture;

[0017] Figure 2 This is a cross-sectional view of the first sampling fixture;

[0018] Figure 3 This is a front view of the second sampling fixture;

[0019] Figure 4 This is an exploded view (front view) of the second sampling fixture.

[0020] Figure 5 This is a cross-sectional view of the second sampling fixture.

[0021] Figure 6 Front view of the main reducer adapter;

[0022] Figure 7 This is a front view of the adapter for the intermediate and final gear reducers.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. First sampling fixture; 101. First glass tube; 102. First push tube; 103. First handle; 104. First movable pressure rod; 105. First piston; 2. Second sampling fixture; 201. Second glass tube; 202. Second push tube; 203. Second handle; 204. Second movable pressure rod; 205. Second piston; 3. Nylon straw; 4. Drainage tube; 5. Sample bottle; 6. Spring plug; 7. Connecting tube; 8. Oil drain adapter; 9. Ejector pin. Detailed Implementation

[0025] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 this utility model.

[0027] like Figure 1-5As shown, a special tooling for sampling helicopter oil includes a first sampling tooling 1 and a second sampling tooling 2. The first sampling tooling 1 includes a first glass tube 101, a first propulsion tube 102, a first handle 103, a first movable pressure rod 104, and a first piston 105. The first propulsion tube 102 is slidably disposed at the input end of the first glass tube 101. A nylon suction tube 3 is detachably connected to the input end of the first propulsion tube 102. The nylon suction tube 3 is used to insert the input end into the oil sump of the helicopter's engine, air starter, and auxiliary power unit to draw oil. The output end of the first propulsion tube 102 extends to the inside of the first glass tube 101. A first piston 105 is disposed at the output end of the rear end of the first propulsion tube 102, with its outer edge completely fitting the inner cavity of the first glass tube 101. A through hole communicating with the first propulsion tube 102 is opened on the first piston 105. A drainage tube 4 is detachably connected to the output end of the rear end of the first glass tube 101. A sample bottle is detachably connected to the output end of the drainage tube 4. 5. Spring plugs 6 are provided at the connection between the first push tube 102 and the nylon suction tube 3 and at the connection between the first glass tube 101 and the drainage tube 4. A first handle 103 is fixedly provided on the outside of the first glass tube 101. The end of the first handle 103 away from the first glass tube 101 is hinged to the lower end of the first movable pressure rod 104. The upper end of the first movable pressure rod 104 is hinged to the first push tube 102, and the hinged end is clearance-fitted with the outside of the first push tube 102. The upper end of the first movable pressure rod 104 is closer to the outside of the first push tube 102. When the first handle 103 is rotated, it can push the first push tube 102 and the first piston 105 to move to the rear end and squeeze out the air in the inner cavity of the first glass tube 101. When the upper end of the first movable pressure rod 104 is rotated away from the first handle 103, it can pull the first push tube 102 and the first piston 105 to move to the front end, so that the inner cavity of the first glass tube 101 generates negative pressure. The nylon straw 3 can draw oil through negative pressure. Both spring plugs 6 are used to make the oil flow only in one direction from the nylon straw 3 to the sample bottle 5.

[0028] In one embodiment, the nylon straw 3 is a three-section straw, wherein the diameter of the connecting section of the nylon straw 3 that connects to the first glass tube 101 is 10mm, the diameter of the middle connecting section is 6mm, and the diameter of the oil suction section is 4mm.

[0029] In one embodiment, the second sampling fixture 2 includes a second glass tube 201, a second propulsion tube 202, a second handle 203, a second movable pressure rod 204, and a second piston 205. The structure of the second sampling fixture 2 is the same as that of the first sampling fixture 1. The input end of the front end of the second glass tube 201 is detachably connected to a connecting tube 7. The input end of the front end of the connecting tube 7 is provided with an oil drain adapter 8. The oil drain adapter 8 is used to connect to the magnetic chip plug of the oil drain port of the helicopter reducer. A pin 9 extending to the inside of the connector is horizontally placed inside the second glass tube 201. The output end of the rear end of the second propulsion tube 202 is detachably connected to a drainage tube 4 and a sample bottle 5 in sequence. The second movable pressure rod 204 is used to push the second propulsion tube 202 and the second piston 205 to the front end, thereby pushing the pin 9 forward to push the magnetic chip detection port of the open oil port. The oil can automatically flow into the second glass tube 201, the drainage tube 4, and the sample bottle 5 under the action of gravity.

[0030] In one embodiment, the first propulsion tube 102 is a metal tube, and the drainage tube 4 is a plastic flexible tube.

[0031] In one embodiment, the ejector pin 9 is a metal ejector pin.

[0032] In this invention, both the first handle and the second handle are equipped with tension springs. The tension springs are used to pull the first pressure rod / second pressure rod back to its original position after the first pressure rod / second pressure rod is released.

[0033] The first glass tube 101 has a volume of 50 mm², the second glass tube 201 has a volume of 20 mm², and the sample bottle 5 has a vent hole on its cap.

[0034] There are gaps for oil flow between the left and right sides of the ejector pin 9 and the second glass tube 201 and the second piston 205.

[0035] The hinged clearance between the first movable pressure rod 104 and the first propulsion tube 102 allows the first movable pressure rod 104 to push the first propulsion tube 102 to maintain horizontal movement when rotating.

[0036] The drain adapter includes two different adapters: one for connecting the main reducer and the other for connecting the intermediate and tail reducers.

[0037] The working process of this utility model:

[0038] First sampling fixture 1 usage procedure:

[0039] Assemble the special tooling, insert the nylon straw 3 into the oil sump of the engine / auxiliary power unit, tighten the sample bottle 5 and the drainage tube 4 sample bottle cap, grasp the first handle 103 and the first movable pressure rod 104 to push the first push tube 102 and the second piston forward, pushing the first push tube 102 and the piston to move inside the first glass tube 101. At this time, the spring plug 6 at the connection between the drainage tube and the push tube is pushed open by the air pressure inside the first glass tube 101, squeezing the air inside the first glass tube 101 into the sample bottle for discharge. The other spring plug 6 is in a closed state. Then release the first movable pressure rod 104, the first push... When the inlet tube 102 and the first piston 105 are reset, the internal volume of the first glass tube 101 increases and the air pressure becomes negative. When the first push tube 102 and the first piston 105 are reset and moved, the air pressure at the nylon straw 3 pushes open the spring plug 6 at the nylon straw 3, drawing the oil into the first glass tube 101 through the nylon straw 3, and then into the sample bottle through the drainage tube. By repeatedly squeezing and releasing the first movable pressure rod 104, the oil is continuously drawn until a sufficient volume is reached. After use, each component can be cleaned separately by disassembly, or new lubricating oil can be drawn to flush the inside of the tooling to ensure the accuracy of the next oil sampling and facilitate storage and use.

[0040] Second sampling fixture 2 usage process:

[0041] Assemble the special tooling, select the oil drain adapter 8 corresponding to the sampling site, and tighten it to connect to the gun body. Connect the oil drain adapter 8 to the magnetic chip grinding plug interface of the sampling site. Hold the second handle 203 and the second movable pressure rod 204 to push the second propulsion tube 202 and the second piston 205 forward. The second piston 205 presses against the ejector pin 9, and the ejector pin 9 opens the elastic plug of the main reducer / intermediate reducer / tail reducer of the magnetic chip grinding detection port. The oil flows out by gravity, reaches the second glass tube 201, and finally enters the sample bottle 5 directly through the drainage tube 4. When the oil reaches the specified sampling capacity, release the second movable pressure rod 204. The second movable pressure rod 204 drives the second propulsion tube 202 and the second piston 205 to move backward and reset. The elastic plug pushes the ejector pin 9 to reset, and the elastic plug of the magnetic chip grinding detection port closes, thus completing the sampling work. After use, each component can be disassembled and cleaned to ensure the accuracy of the next oil sampling and facilitate storage and use.

[0042] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A special tooling for sampling helicopter oil, characterized in that, The system includes a first sampling fixture (1) and a second sampling fixture (2). The first sampling fixture (1) includes a first glass tube (101), a first propulsion tube (102), a first handle (103), a first movable pressure rod (104), and a first piston (105). The first propulsion tube (102) is slidably disposed at the input end of the first glass tube (101). A nylon suction tube (3) is detachably connected to the input end of the first propulsion tube (102). The nylon suction tube (3) is used to extend the input end into the oil sump of the helicopter's engine, air starter, and auxiliary power unit. The oil is drawn from the inside. The output end of the first push tube (102) extends to the inside of the first glass tube (101). The output end of the rear end of the first push tube (102) is provided with a first piston (105) whose outer edge is completely fitted with the inner cavity of the first glass tube (101). The first piston (105) has a through hole that communicates with the first push tube (102). The output end of the rear end of the first glass tube (101) is detachably connected to a drainage tube (4). The output end of the drainage tube (4) is detachably connected to a sample bottle (5). The first push tube (102) draws oil from the inside. 02) Spring plugs (6) are provided at the connection between the nylon straw (3) and the connection between the first glass tube (101) and the drainage tube (4). A first handle (103) is fixedly provided on the outside of the first glass tube (101). The end of the first handle (103) away from the first glass tube (101) is hinged to the lower end of the first movable pressure rod (104). The upper end of the first movable pressure rod (104) is hinged to the first push tube (102), and the hinged end is clearance-fitted with the outside of the first push tube (102). The upper end of the first movable pressure rod (104) moves closer to the first handle. When the hand (103) is rotated, it can push the first push tube (102) and the first piston (105) to move to the rear end and squeeze out the air in the inner cavity of the first glass tube (101). When the upper end of the first movable pressure rod (104) is rotated away from the first handle (103), it can pull the first push tube (102) and the first piston (105) to move to the front end, so that the inner cavity of the first glass tube (101) generates negative pressure. The nylon straw (3) can draw oil through negative pressure. Both spring plugs (6) are used to make the oil flow only in one direction from the nylon straw (3) to the sample bottle (5).

2. The special tooling for helicopter oil sampling according to claim 1, characterized in that, The nylon straw (3) is a three-section straw. The diameter of the connecting section of the nylon straw (3) connected to the first glass tube (101) is 10mm, the diameter of the middle connecting section is 6mm, and the diameter of the oil suction section is 4mm.

3. The special tooling for helicopter oil sampling according to claim 1, characterized in that, The second sampling fixture (2) includes a second glass tube (201), a second propulsion tube (202), a second handle (203), a second movable pressure rod (204), and a second piston (205). The structure of the second sampling fixture (2) is the same as that of the first sampling fixture (1). The input end of the front end of the second glass tube (201) is detachably connected to a connecting pipe (7). The input end of the front end of the connecting pipe (7) is provided with an oil drain adapter (8). The oil drain adapter (8) is used to connect with the magnetic chip grinding plug of the oil drain port of the helicopter gearbox. Next, a pin (9) extending to the inside of the connector is placed horizontally inside the second glass tube (201). The output end of the second push tube (202) is sequentially and detachably connected to a drainage tube (4) and a sample bottle (5). The second movable pressure rod (204) is used to push the second push tube (202) and the second piston (205) to move towards the front end, thereby pushing the pin (9) forward to push the magnetic chip detection port of the open oil port. The oil can automatically flow into the second glass tube (201), the drainage tube (4) and the sample bottle (5) under the action of gravity.

4. The special tooling for helicopter oil sampling according to claim 1, characterized in that, The first propulsion tube (102) is a metal tube, and the drainage tube (4) is a plastic hose.

5. The special tooling for helicopter oil sampling according to claim 3, characterized in that, The ejector pin (9) is a metal ejector pin.

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