372results about How to "Overcome or mitigate technical deficiencies" patented technology

The invention belongs to the technical field of jet pipe structure design, and particularly relates to an adjustable jet pipe structure. The adjustable jet pipe structure comprises a jet pipe connecting cylinder, an adjusting sheet and actuating cylinders; the outer wall of the jet pipe connecting cylinder is provided with a reverse thrust exhaust port, the reverse thrust exhaust port is inclined towards the inlet end of the jet pipe connecting cylinder, and the adjusting sheet is arranged at the outlet end of the jet pipe connecting cylinder and is in sliding connection with the jet pipe connecting cylinder; the actuating cylinders are hinged between the jet pipe connecting cylinder and the adjusting sheet so as to drive the adjusting sheet to slide relative to the jet pipe connecting cylinder, and then the actuating cylinders have a forward thrust state and a reverse thrust state; in the forward thrust state, the adjusting sheet moves to slide relative to the jet pipe connecting cylinder, the effective area for shielding the outlet end of the jet pipe connecting cylinder is gradually reduced, the effective area for shielding the reverse thrust exhaust port is gradually increased, and finally, the effective area of the reverse thrust exhaust port can be completely shielded; and in the reverse thrust state, the adjusting sheet moves to slide relative to the jet pipe connecting cylinder, the effective area for shielding the reverse thrust exhaust port is gradually reduced, the effective area for shielding the outlet end of the jet pipe connecting cylinder is gradually increased, and finally, the effective area of the outlet end of the jet pipe connecting cylinder can be completely shielded.

The invention belongs to the technical field of bearing cooling design, and particularly relates to a bearing cooling structure. The bearing cooling structure comprises a shaft neck, a bearing and a bearing cooling oil spray nozzle, an annular shaft neck oil collecting groove is formed in the inner wall of the shaft neck, a plurality of shaft neck oil throwing holes distributed in the circumferential direction are formed in the outer wall of the shaft neck, and each shaft neck oil slinging hole communicates with the annular shaft neck oil collecting grooves; the outer ring of the bearing is connected to the shaft neck in a sleeving mode, a plurality of bearing oil inlet holes are formed in the outer ring, each bearing oil inlet hole correspondingly communicates with one shaft neck oil throwing hole; and the bearing cooling oil spray nozzle is arranged in the shaft neck so as to spray lubricating oil into the annular shaft neck oil collecting groove.

The invention belongs to the technical field of casing hole plugging design, and particularly relates to a hole plugging structure. The hole plugging structure comprises a mounting cylinder, a plugging pin and a spring, wherein two axial guide grooves, two circumferential guide grooves and a limiting bulge are arranged on the inner wall of the mounting cylinder; one end of each circumferential guide groove is correspondingly communicated with one axial guide groove; and two guide bulges are arranged on the outer wall of the plugging pin. The hole plugging structure has a hole plugging state and a non-hole-plugging state; when the hole plugging structure is in the hole plugging state, each guide bulge is correspondingly clamped in one circumferential guide groove, one end of the plugging pin extends out of the mounting cylinder, one end of the spring abuts against the limiting bulge, and the other end of the spring abuts against one or two guide bulges; and when the hole plugging structure in the non-hole-plugging state, the plugging pin rotates, so that each guide bulge is separated from the corresponding circumferential guide groove, enters the corresponding axial guide groove andmoves along the corresponding axial guide groove under the pushing of the spring, and the end, extending out of the mounting cylinder, of the plugging pin retracts. In addition, the invention relatesto a casing hole plugging structure with the hole plugging structure.

The invention belongs to the technical field of high and low temperature impact test design, and particularly relates to a high and low temperature impact test device. The device comprises: a supporting cylinder; a heating source which is arranged on the outer side of the supporting cylinder; two end covers, wherein each end cover is correspondingly connected to one end of the supporting cylinder, a plurality of impact holes are formed in one end cover, and each impact hole is communicated with the interior of the supporting cylinder; a cover plate, wherein a liquid nitrogen inflow hole and a high-pressure air inflow hole are formed in the cover plate, the cover plate is connected to the outer wall of the end cover with the multiple impact holes, a mixing cavity is formed between the cover plate and the end cover, and the mixing cavity is communicated with the impact holes, the liquid nitrogen inflow hole and the high-pressure air inflow hole.

The invention belongs to the technical field of structural designs of rotor and stator structures of compressors, and particularly relates to a casing structure; the casing structure comprises an outer casing and an inner casing, wherein the inner casing is arranged at the inner side of the outer casing and located at the rear section of the outer casing; and an annular air gap is formed between the inner casing and the outer casing. In addition, the invention relates to a rotor and stator structure comprising the casing structure.

The invention relates to an intermediate case assembly. The intermediate case assembly comprises an intermediate case, a front shunt ring, an outer ring, an inner ring, a plurality of support plates,a plurality of duct conversion valves, a plurality of adjusting rods and an actuating mechanism, wherein the front shunt ring is arranged in the intermediate case; the outer ring is connected with thefront shunt ring in a butt joint mode; the inner ring is arranged in the outer ring; one end of each support plate is connected with the intermediate case, the other end of each support plate is connected with the inner ring, and a notch is formed in one side, face back onto the inlet end of the intermediate case, of each support plate; a rear shunt ring is clamped into the notches; the pluralityof duct conversion valves are hinged to the front shunt ring; the two sides of each duct conversion valve are in sealing contact with the corresponding two adjacent support plates; one end of each adjusting rod is hinged to the corresponding duct conversion valve; the actuating mechanism is arranged on the intermediate case and hinged with the other end of each adjusting rod so as to drive each adjusting rod to move and make each duct conversion valve to rotate, so that the intermediate case assembly is provided with an outer duct closing state and an outer duct opening state; in the outer duct closing state, each duct conversion valve is connected to the rear shunt ring in an overlap joint mode; and in the outer duct opening state, each duct conversion valve is separated from the rear shunt ring.

The invention belongs to the technical field of engine air intake frame design, and particularly relates to an engine air intake frame, which comprises an inlet casing, an inner ring and a plurality of support plates, wherein the inlet casing is provided with a plurality of through holes distributed in a circumferential direction, and a plurality of flanges are arranged on the outer wall of the inlet casing; each flange is correspondingly close to one through hole; the inner ring is arranged in the inlet casing; the plurality of support plates are arranged between the inlet casing and the inner ring; one end of each support plate is connected to the inner ring; and the other end of each support plate correspondingly extends out from one through hole and is connected to the corresponding flange through a bolt.

The invention belongs to the technical field of engine rotor wheel disk assembly design, and particularly relates to a rotor wheel disk assembly structure. The assembly structure comprises a primary rotor wheel disk, a plurality of connecting bolts, a plurality of clamping rings, a secondary rotor wheel disk and multiple connecting nuts, wherein the primary rotor wheel disk is provided with a primary drum, the primary drum is provided with a primary connecting edge, and the primary connecting edge is provided with a plurality of primary connecting holes formed in the circumferential direction;each connecting bolt correspondingly penetrate through one primary connecting hole, the head portions of the connecting bolts are located on the inner side of the primary drum, and annular clamping grooves are formed in the connecting bolts; each clamping ring is correspondingly clamped into one annular clamping groove; the secondary rotor wheel disk is provided with a plurality of secondary connecting holes in the circumferential direction; the portion, extending out of the corresponding primary connecting hole, of each connecting bolt correspondingly penetrates through one secondary connecting hole; each clamping ring is located between the primary connecting edge and the secondary rotor wheel disk; and each nut is correspondingly in threaded connection with one connecting bolt.

The invention belongs to the technical field of assembly design of a stator of a gas compressor, and particularly relates to a stator structure. The stator structure comprises a stator casing, multiple stator blades and multiple positioning blocks, wherein multiple limit holes distributed in the circumferential direction are formed in the stator casing; the multiple stator blades are arranged in the stator casing; an upper journal is arranged on the upper end surface of each stator blade, and a lower journal is arranged on the lower end surface of each stator blade; each upper journal correspondingly extends into a limit hole; each positioning block is provided with a positioning surface and an arc surface opposite to the positioning surface; a positioning hole is formed in each positioning surface; each lower journal is correspondingly inserted into one positioning hole, and the corresponding lower end surface is attached to the corresponding positioning surface; and the arc surfacesare combined to form an annular surface. Besides, the invention further relates to an assembly method of the stator structure.

An intermediate case test load loading device comprises: an adapter cylinder, wherein one end of the adapter cylinder is in butt joint with an intermediate case, and the outer wall of the end is connected with a section torque loading connector and a section radial loading connector so as to apply section torque and radial load to the intermediate case; a switching frame connected with the end face of the other end of the switching cylinder, wherein two section bending moment and axial loading joints are connected to the switching frame so as to apply section bending moment and axial load to the intermediate case; a bearing frame connected to the switching frame, wherein a fulcrum axial load actuator is positioned and mounted on the bearing frame; a switching shaft, one end of the switching shaft is connected with a fulcrum part in the intermediate case, the other end of the switching shaft extends out of the switching cylinder, and the outer wall of the end is connected with a fulcrum radial loading joint so as to apply a fulcrum radial load to the intermediate case; and a switching rack arranged on the periphery of the switching shaft in a sleeving manner, connected with the fulcrum part in the intermediate case, ans connected with a fulcrum axial loading joint. The fulcrum axial loading joint is connected with the fulcrum axial load actuator so as to apply a fulcrum axial load to the intermediate case.