Device for disassembling and assembling upper component of oil return chamber of hydraulic oil tank of helicopter

Abstract

The utility model belongs to the hydraulic field of helicopters, and relates to a device for disassembling and assembling an upper component of an oil return chamber of a hydraulic oil tank of a helicopter. The device comprises an upper cover, a lower cover and a central threaded rod, the bottom plane of the upper cover is contacted with the upper plane of the gasket of the oil return filter; the upper plane of the lower cover is contacted with the bottom plane of the oil return filter; threaded holes are formed in the upper cover and the lower cover; the upper end of the central threaded rod is inserted into the threaded hole of the upper cover; the central threaded rod is matched with the threaded hole to realize vertical movement of the upper and lower covers; the upper cover and the lower cover are both of two-section cylindrical structures with plane steps, the upper cover is of a big-end-up two-section cylindrical structure, and the lower cover is of a big-end-down two-section cylindrical structure; the upper and lower covers vertically press the whole oil return filter upwards and downwards; and the large cylindrical section is matched with a wrench.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of helicopter hydraulic pressure relates to a device for dismounting and mounting the upper assembly of the oil return chamber of the hydraulic tank of a helicopter. BACKGROUND

[0002] In the hydraulic system of a certain type of aircraft, the left and right hydraulic tank assemblies are distributed on the platform. The hydraulic tank metal shell has an oil return chamber, and the oil return chamber has an oil return filter. During the overhaul of the helicopter, the oil return filter element often needs to be dismounted and reinstalled due to the need for cleaning or fault reasons such as oil leakage.

[0003] The upper assembly of the oil return chamber is composed of a flange, a spring, a snap spring, a gasket, a hole elastic stop ring, an O-shaped sealing ring, and a cap. During installation, the spring is inserted into the center hole of the flange, and then the gasket and the hole elastic stop ring are installed on the upper part of the spring. The gasket and the hole elastic stop ring are also installed in the center hole of the flange. At this time, the upper plane in the hole of the flange forms a small step gap with the gasket and the hole elastic stop ring. The step gap is used to install the snap spring. The snap spring is compressed by using a snap spring clamp, and the outer diameter is reduced under the pressure. Then it is inserted into the step gap of the hole. After releasing the pressure of the snap spring clamp, the snap spring quickly restores its original outer diameter in the step hole. The outer diameter of the snap spring is larger than that of the gasket and the hole elastic stop ring. Therefore, by pressing the flat surface, the snap spring compresses the spring under the vertical pressure and shrinks in the oil return filter. Finally, the cap is assembled on the top, and the O-shaped sealing ring seals to prevent oil leakage.

[0004] During the dismounting process of the oil return filter, if the snap spring is directly taken out from the flange hole by using the snap spring clamp under pressure. After the snap spring is taken out, the pressure of the spring disappears instantly, and the spring will be pulled out from the flange. It is fast and heavy (spring, gasket, and hole elastic stop ring are all steel parts), which can easily injure the dismounting personnel and cause safety accidents. In addition, when installing the oil return filter, the worker needs to use great force to press the snap spring clamp with one hand, and press the spring, gasket, and hole elastic stop ring downward with the other hand to prevent them from being pulled out. It is difficult to operate and time-consuming and labor-intensive. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims to provide a device for dismounting and mounting the upper assembly of the oil return chamber of the hydraulic tank of a helicopter, which solves the problem of difficult dismounting and mounting of the components of the oil return chamber of the hydraulic tank of the helicopter. The upper assembly of the oil return chamber can be dismounted and mounted in a time-saving and labor-saving manner, and the operation is safe.

[0006] TECHNICAL SCHEME

[0007] The device for dismounting and mounting the upper assembly of the oil return chamber of the hydraulic tank of a helicopter comprises an upper cover, a lower cover, and a center threaded rod.

[0008] The bottom plane of the upper cover is in contact with the upper plane of the gasket of the oil return filter, and the upper plane of the lower cover is in contact with the bottom plane of the oil return filter;

[0009] Threaded holes are arranged in the upper cover and the lower cover; the upper end of the central threaded rod is inserted into the threaded hole of the upper cover, and the lower end is inserted into the threaded hole of the lower cover; the central threaded rod and the threaded holes are matched to realize the up-down movement of the upper cover and the lower cover; the upper cover and the lower cover are both two-section cylindrical structures with plane steps; the upper cover is a two-section cylindrical structure with the upper section being larger than the lower section, and the lower cover is a two-section cylindrical structure with the lower section being larger than the upper section; the upper cover and the lower cover are vertically pressed towards the oil return filter; the large cylindrical section is matched with a wrench.

[0010] Further, the plane step surface of the lower cover is larger than that of the upper cover.

[0011] Further, cylindrical inner holes for weight reduction are arranged in the upper cover and the lower cover.

[0012] Further, the upper cover and the lower cover are both aluminum covers.

[0013] Further, the central threaded rod is a two-section quenched tool steel rod with threaded forms.

[0014] Further, the total length of the central threaded rod is longer than the length of the oil return filter.

[0015] Beneficial effects:

[0016] The device can save time and labor for disassembling and assembling the upper assembly of the oil return chamber of the hydraulic oil tank of a helicopter. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Fig. 1 is a structural schematic diagram of an upper cover.

[0018] Figure 2 Fig. 2 is a structural schematic diagram of a lower cover.

[0019] Figure 3 Fig. 3 is a structural schematic diagram of a device for disassembling and assembling an upper assembly of an oil return chamber of a helicopter hydraulic oil tank.

[0020] Figure 4 Fig. 4 is an exploded view of the structure of the upper assembly of the oil return chamber. DETAILED DESCRIPTION

[0021] The device for disassembling and assembling the upper assembly of the oil return chamber of the hydraulic oil tank of the helicopter provided by the utility model is composed of three parts, which are an upper cover 1, a lower cover 2 and a central threaded rod 3. Figure 1 Figure 2 Figure 3 ​​As shown, the upper cover 1 and the lower cover 2, in use, need to be compressed vertically upward and downward to the whole oil filter by threads, in order to avoid the wear of the contact surface of the upper and lower ends of the oil filter, the upper cover 1 and the lower cover 2 are designed to be made of aluminum material. The upper cover 1 and the lower cover 2 are designed to have flat steps for facilitating the wrench clamping and screwing threads, and the step surface of the lower cover 2 is larger than that of the upper cover 1, so that the lower cover 2 is placed at the bottom of the oil filter, and the larger the flat surface area is, the more stable the placement is, and the less likely the lower cover 2 is to fall down. The upper cover 1 and the lower cover 2 are designed to have cylindrical inner holes, so as to reduce the weight and make the device more portable and flexible. The two ends of the center threaded rod are designed to have threaded forms, so as to be screwed with the center holes of the upper cover 1 and the lower cover 2, and the material of the center threaded rod is quenched tool steel, because the center threaded rod needs to bear the tightening force when the threads are tightened, so the function of the center threaded rod should be rigid, and the center threaded rod is not easy to break and deform.

[0022] The upper cover and the lower cover are both aluminum covers.

[0023] The working principle is as follows:

[0024] When disassembling the upper assembly of the oil return chamber, the oil filter is vertically placed on a plane (as shown in FIG. 1), Figure 4 the top cap is removed first, then the center threaded rod 3 is vertically inserted into the center through hole of the oil filter, the total length of the center threaded rod 3 is longer than that of the oil filter, at this time the threads at both ends of the center threaded rod 3 are respectively extended from the upper and lower ends of the oil filter. Then the lower cover 2 is installed on the threaded rod of the center threaded rod 3 extended from the lower end of the oil filter, and the lower cover 2 is tightened upward by threads, and then the upper cover 1 is installed on the threaded rod of the center threaded rod 3 extended from the upper end of the oil filter, and the upper cover 1 is tightened downward by threads, under the action of the downward and upward tightening force, the device is fixed in the oil filter. At this time, the bottom plane of the upper cover 1 is in contact with the upper plane of the gasket of the oil filter, the gasket and the hole are pressed downward by the downward pressure of the threads, and the spring is also pressed at the same time, finally the snap spring is safely removed using the snap spring pliers, the upper cover 1 and the threaded rod replace the snap spring to provide downward pressure to the spring, so that the spring still bears the downward pressure during the disassembly process and will not come out. The worker uses one hand to loosen and remove the lower cover 2 at the bottom of the oil filter, and uses the other hand to press the upper cover 1 vertically downward at the upper end, the pressure of the spring at the lower end of the flange is disappeared, the spring is stretched in the oil filter without pressure, then the upper cover 1 and the center threaded rod 3 are slowly taken out from the upper end of the oil filter, the gasket, the hole, the elastic retainer and the O-shaped sealing ring, the spring and other components are loosened in the device, and the worker can easily take out the upper assembly.

[0025] When installing the upper assembly of the oil return chamber, the oil filter is vertically placed on a plane (as shown in FIG. 1), Figure 4), in the flange plate in order to assemble spring, washer and hole elastic stopper, O-shaped washer, and then the device center threaded rod 3 is inserted into the center hole of the oil filter, at this time the two ends of the center threaded rod 3 are threaded and extend from the upper and lower ends of the oil filter respectively. Then the lower cover 2 is installed on the threaded rod of the center threaded rod 3 extending from the lower end of the oil filter, and the lower cover 2 is screwed up tightly by threads, and then the upper cover 1 is installed on the threaded rod of the center threaded rod 3 extending from the upper end of the oil filter, and the upper cover 1 is screwed down tightly by threads, and under the action of the screwing force downward and upward, the device is fixed in the oil filter. At this time the bottom plane of the upper cover 1 is in contact with the upper plane of the washer of the oil filter, and the washer and the hole elastic stopper are pressed downward under the pressure of the screwing force downward, and the spring is also pressed tightly. Finally, the snap spring is installed in the step gap of the flange plate using the snap spring pliers, and the effect of the upper cover 1 and the threaded rod is to replace the snap spring to provide downward pressure to the spring, so that the spring is still under the downward pressure during the installation process and will not pop up. The worker unscrews the upper cover 1 and the lower cover 2 from the threaded rod at both ends of the device, and finally the center threaded rod 3 of the device can be removed.

Claims

1. A device for disassembling the upper assembly of the oil return chamber of a helicopter hydraulic tank, characterized in that, The utility model relates to a center screw rod type oil filter presser, which comprises: an upper cover, a lower cover and a center screw rod; the bottom plane of the upper cover is in contact with the upper plane of the gasket of the oil filter, and the upper plane of the lower cover is in contact with the bottom plane of the oil filter; threaded holes are arranged in the upper cover and the lower cover; the upper end of the center screw rod is inserted into the threaded hole of the upper cover, and the lower end is inserted into the threaded hole of the lower cover; the center screw rod and the threaded holes are matched to realize the up-and-down movement of the upper and lower covers; the upper and lower covers are both two-section cylindrical structures with plane steps; the upper cover is a two-section cylindrical structure with the upper section larger than the lower section, and the lower cover is a two-section cylindrical structure with the lower section larger than the upper section; the upper and lower covers are vertically pressed upward and downward to compress the whole oil filter; the large cylindrical section is matched with a wrench.

2. The apparatus of claim 1, wherein, The plane step surface of the lower cover is larger than that of the upper cover.

3. The apparatus of claim 1, wherein, Cylindrical inner holes for the purpose of weight reduction are arranged in the upper cover and the lower cover.

4. The apparatus of claim 1, wherein, The upper cover and the lower cover are both aluminum covers.

5. The apparatus of claim 1, wherein, The center screw rod is a two-section quenched tool steel rod with threads.

6. The apparatus of claim 1, wherein, The total length of the center screw rod is longer than that of the oil filter.

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