32results about How to "Radial dimensions are compact" patented technology

The invention belongs to the field of vibration control, and particularly relates to a spring damping vibration isolator for isolating vibrations. The spring damping vibration isolator comprises an upper support plate, an elastic element and a lower support plate, wherein the elastic element is positioned between the upper support plate and the lower support plate; a damping cylinder is arranged below the lower support plate; a liquid damping material is arranged in the damping cylinder; a movable body linked with the upper support plate or lower support plate is arranged in the damping cylinder; and at least part of the movable body is arranged in the liquid damping material. In the invention, the damping cylinder and the movable body are independently arranged under the elastic element, thereby greatly enhancing the system damping, and overcoming the defect of limited contact area of spring and damping material restricted by the space in the damping cylinder in the prior art; and the invention strengthens the sealing performance, thereby greatly enhancing the waterproof property of the vibration isolator. The invention has the advantages of simple structure, stable property and strong applicability, can be widely used for damping in the fields of machinery, rail transportation, bridges, architectural structures and the like, and has obvious economic and social benefits.

Support arms are disposed on a tilting shaft on a bracket of an outboard motor. An electric actuator is mounted between the support arms. The electric actuator includes a cover member, first and second electric motors disposed individually on the opposite ends of the cover member, a feed screw configured to be rotated by the electric motors, a nut member configured to move along an axis as the feed screw rotates, a drive arm configured to move integrally with the nut member and transversely relative to the boat body, and protective boots. The drive arm is connected to a steering arm through an engaging member. If the drive arm moves in the direction of the axis along the cover member, the steering angle of the steering arm changes depending on the degree of movement of the drive arm.

The invention discloses a high-frequency high-power microwave device, which comprises a circular waveguide sleeve and an inner conductor coaxial with the circular waveguide sleeve. An electron beam transmission channel with an inner diameter of 8mm and an outer diameter of 14.6mm is formed between the inner conductor and the circular waveguide sleeve. A high-frequency structure is sequentially provided with a reflection region, a beam current pre-modulation region, a phase modulation region and a beam wave conversion region which are coaxial in the electron beam transmission direction. An annular collector protruding inwards in the radial direction is arranged behind the beam wave conversion region. An annular electron beam with the inner diameter of 12mm, the outer diameter of 12.6mm, thevoltage of 400kV and the beam intensity of 7.3kA is transmitted in the high-frequency structure under the guidance of an axial magnetic field with the magnetic field intensity of 1.5T, and high-frequency high-power microwaves with the frequency of 67.4GHz are generated. The high-frequency high-power microwave device is simple in structural size, and has the advantages of being small, light and easy to assemble.

The invention discloses an L-band three-cavity high-power microwave device, which comprises a circular waveguide sleeve and an inner conductor coaxial with the circular waveguide sleeve. A cathode coaxial with the circular waveguide sleeve is arranged at one end in the circular waveguide sleeve. The opening of the cathode is annular, the inner diameter of the cathode is 60mm, and the outer diameter of the cathode is 69mm. The circular waveguide sleeve is sequentially provided with a reflection cavity, a resonant cavity and an extraction cavity with the same inner diameter in the electron beamtransmission direction, and the reflection cavity, the resonant cavity and the extraction cavity are annular grooves formed in the circular waveguide sleeve. The axial length of the microwave device is 130mm, the maximum diameter of the microwave device is 150mm, and the diameter of the inner conductor is 40mm. The cathode emits an annular electron beam with the beam intensity of 7.0kA, the innerdiameter of 60mm and the outer diameter of 69mm under a 400KV voltage, the annular electron beam is transmitted in the microwave device under the guidance of a 0.4T axial magnetic field, and L-band high-power microwaves with the frequency of 1.92GHz are generated through radiation within one pulse time. The L-band three-cavity high-power microwave device has the advantages of being small in size,light and easy to adjust.

The invention discloses an S-band three-cavity high-power microwave device, which comprises a circular waveguide sleeve. The circular waveguide sleeve is sequentially provided with a reflection cavity, a resonant cavity and an extraction cavity with the same inner diameter in the electron beam transmission direction, and the reflection cavity, the resonant cavity and the extraction cavity are annular grooves formed in the circular waveguide sleeve. An annular electron beam with the voltage of 400kV and the beam intensity of 7.0kA is transmitted in the microwave device under the guidance of a 0.4T axial magnetic field, and S-band high-power microwaves with the frequency of 2.4GHz are generated through radiation within one pulse time. The S-waveband three-cavity high-power microwave device has the advantages of being small in size, light and easy to adjust.

Provided is a seal structure for a fuel pump having a double-seal construction of a separately provided outer seal and inner seal, with which it is possible to improve the ease with which both seals can be assembled, and with which it is possible to employ a compact installation area for the double seal. This double seal (71) is provided between a fuel pump insertion hole and a flange (43) of the fuel pump, and has an outer seal (72) and a separate inner seal (82). Outer seal inward protrusions (73) which protrude radially inward are provided on the outer seal (72), and inner seal outward protrusions (83) which protrude radially outward are provided on the inner seal (82), and slits (48, 49) are provided as positioning parts into which the respective protrusions (73, 83) fit. The protrusions (73, 83) are arranged alternately in the circumferential direction of the seals (72, 82), and are positioned within the same region in the radial direction.

The invention discloses a coaxial high-frequency high-power microwave device, which comprises a circular waveguide sleeve and an inner conductor coaxial with the circular waveguide sleeve. A high-frequency structure is arranged in the circular waveguide sleeve. The high-frequency structure is sequentially provided with a reflection region, a beam current pre-modulation region, a phase modulation region and a beam wave conversion region which are coaxial in the electron beam transmission direction. The reflection region, the beam pre-modulation region, the phase modulation region and the beam-wave conversion region are respectively provided with annular groove-shaped cavities at the corresponding positions of the sleeve wall of the circular waveguide sleeve and the inner conductor, and thecavities at the corresponding positions of the sleeve wall of the circular waveguide sleeve and the inner conductor form a reflection cavity, beam pre-modulation cavities a phase modulation cavity andbeam-wave conversion cavities. An annular collector protruding inwards in the radial direction is arranged behind the beam wave conversion region. An annular electron beam with the voltage of 400kV and the current of 9.0kA is transmitted in the microwave device under the guidance of an axial magnetic field with the magnetic field intensity of 1.2T, and 70GHz high-frequency high-power microwaves are generated. By adopting the coaxial high-frequency high-power microwave device, high-frequency high-power microwaves can be generated, and the microwave generation efficiency can be improved.

The invention discloses a welding process and an application device of a corrugated pipe assembly. The welding process includes steps that a, primary and secondary pieces are formed by welding; b, a corrugated pipe core is formed by welding; c, a corrugated pipe is formed by welding; d, the corrugated pipe assembly is formed by welding; a sealing performance test is performed. A corrugated pipe sealing device is characterized by comprising the corrugated pipe assembly, a casing, a stationary ring and a moving ring, wherein the left end of the casing is embedded into a groove face, the stationary ring is arranged in a step surface, the moving ring is attached to the end face of the stationary ring, and a contact face forms a sealing end face. The welding process and the application device of the corrugated pipe assembly have the advantages that the welding efficiency is high, the accuracy is good, the elastic compensation is stable, and the service life is long.

A torque limiter device for limiting a torque transmitted between a power source-side member and an output-side member is disclosed. The torque limiter device includes a cover, a friction disc and an urging member. The cover includes a coupling portion, a tubular portion and a support portion. The coupling portion is coupled to the power source-side member. The tubular portion axially extends from the coupling portion. The support portion extends from the tubular portion to an inner peripheral side. The friction disc is accommodated in an inner peripheral space of the tubular portion of the cover, and is pressed toward the power source-side member. The urging member is supported by the support portion of the cover, and urges the friction disc toward the power source-side member.

The invention relates to a radial roller screw and a variable-speed transmission thereof. A rotary disc (3), a toothed disc (15), a slide block (4) and a roller (5) are used for sheathing and rotation; when a differential gear is engaged by a clutch, the rotary disc (3) rotates relative to the toothed disc (15), the slide block (4) drives a small center shaft (6) and planetary wheels (24) to do radial displacement, the output rotation speed is gradually increased and decreased, and the stepless variable-speed transmission is realized; a spline shaft (28) is connected with a plurality of pairs of driving wheels (27) to respectively drive several planetary wheels (24); an outer press ring (30) and an outer disc spring (23) are fixedly connected and are arranged in a radial floating sleeve ring to form single-line transmission; the planetary wheels (24) are movably matched and parallelly connected with the small center shaft (6) to form a multi-line distribution beam type cage-shaped revolving body; the planetary wheels (24) are pressed by an inner disc spring and the outer disc spring, and the contact transmission force and torque are proportionally increased and decreased, and are consistently adjusted; the clutch (9) and a shift rod (29) synchronously move left and right at equal amount, and the small center shaft (6) parallelly displaces. Each line of planetary wheels (24) bears the load, so the contact stress is decreased, and the slip rate is reduced. The transmission effect of the high-power and high-efficiency stepless variable speed in automobiles and numerical control machining tools is obvious.

The invention relate to a double-action multistage hydraulic oil cylinder with a solid piston rod. The hydraulic oil cylinder comprises a first-stage cylinder sleeve, pistons, the piston rod and a plurality of stages of inner cylinder sleeves including a tail-stage cylinder sleeve. The piston rod is arranged in the tail-stage cylinder sleeve and is a solid rod. An oil feeding hole is arranged at the bottom end of the first-stage cylinder sleeve, and an oil discharging hole is arranged at the other end. A piston is fixed outside one end of each stage of inner cylinder sleeve close to the oil feeding hole, each stage of inner cylinder sleeve is provided with an oil guide hole which is a through hole communicating the inside and the outside of the inner cylinder sleeve, two outlets are located on the same side of the pistons and arranged , the outlet on the outer wall is close to the pistons, and the outlet arranged on the inner wall is arranged at the end far away from the piston. An oil pipe of the oil cylinder is not stretched, shortened or bended with reciprocating movement of the tail-stage piston rod, so that the oil cylinder prevents the oil pipe from being collided and interfered with the tail-stage piston rod in reciprocating movement and being abraded. The piston rod is of a solid structure, and is better in rigidity, low in processing cost and compact in radial size.

The invention discloses a C-band and X-band double-frequency controllable compact high-power microwave device. The microwave device comprises aperiodic C-band and X-band slow-wave structures which aresequentially arranged and comprise coaxial inner conductors, a metal circular waveguide capable of moving axially is arranged between the C-band slow-wave structure and the X-band slow-wave structure, and part of the cavity of the C-band slow-wave structure or the X-band slow-wave structure can be directionally covered by controlling the axial position of the metal circular waveguide; the ratio of the total axial length of the C-band slow-wave structure to the C-band radiation wavelength is 1.6, the ratio of the total axial length of the X-band slow-wave structure to the X-band radiation wavelength is 1.97, and the inner diameter of the microwave device is 76 mm. Annular electron beams with the voltage of 380kV, the current of 6kA, the inner diameter of 60mm and the outer diameter of 70mmare transmitted in the microwave device under the guidance of a 0.63 T magnetic field, and 4GHz or 8GHz high-power microwaves are generated through controllable radiation. By adopting the C-band andX-band double-frequency controllable compact high-power microwave device provided by the invention, radiation can be controlled to generate 4GHz or 8GHz high-power microwaves.

The invention discloses an S-band and C-band double-frequency controllable high-power microwave device, an inner conductor and a four-cavity slow-wave structure which are coaxial are arranged in the microwave device, and the left end of the microwave device is provided with a circular ring closed structure with the same inner diameter as the four-cavity slow-wave structure; the relative position of the four-cavity slow-wave structure in the microwave device can be axially adjusted, the total axial length of the four-cavity slow-wave structure is 170mm, and the inner diameter of the four-cavityslow-wave structure is 76mm; when the axial distance between the rightmost end of the four-cavity slow wave structure and the leftmost end of the inner conductor is adjusted to be 240 mm, an annularelectron beam is transmitted and radiated in the microwave device to generate S-band high-power microwaves; when the axial distance between the rightmost end of the four-cavity slow-wave structure andthe leftmost end of the inner conductor is adjusted to be 162.5 mm, the annular electron beam is transmitted in the microwave device, and C-band high-power microwaves are generated through radiation.By adoption of the S-band and C-band double-frequency controllable high-power microwave device, S-band and C-band controllable high-power microwave output can be achieved.