30results about How to "Short axial distance" patented technology

The hydraulic cylinder having a portion on a side of a lip tip end of an annular clearance between an inner circumferential face of a shaft hole of a cylinder and a piston is made up of a minute clearance in order to suppress protrusion of the lip, wherein an annular clearance area for suppressing occurrence of the cavitation and for shortening an axial distance of the annular clearance portion made up of the minute clearance is formed on an opposite side of the annular clearance portion from a mounting groove.

The invention provides an impeller built-in type high-speed centrifugal pump which comprises a shell and a rotating wheel. The rotating wheel is rotatably mounted in the shell. The impeller built-in type high-speed centrifugal pump is characterized in that the impeller built-in type high-speed centrifugal pump further comprises a motor stator and a motor rotor, the motor stator is mounted on the shell, the motor rotor is fixedly connected with the rotating wheel, the rotating wheel comprises an inducer and a centrifugal impeller, an outer ring is arranged on the edge of the outer side of the inducer, and the outer ring of the inducer is fixedly connected with the inner circle of the motor rotor; the motor stator is electrified, so that the motor rotor rotates; the centrifugal impeller andthe inducer rotate synchronously; and the rotating speed of the rotating wheel is not lower than 2800 r / min. The problem that the water outlet direction of a traditional centrifugal pump is perpendicular to the rotation axis of the pump is solved, meanwhile, the structural size of the traditional centrifugal pump is reduced, the axial force of the rotor is reduced, and the requirements of high-speed navigation devices such as torpedoes for high lift, large flow, stable operation and compact structures of water jet propulsion pumps can be met.

The invention relates to a transmission (G) for a motor vehicle, comprising a drive train oriented transversely to the direction of travel of the motor vehicle, the transmission (G) comprising at least two gear-forming planetary gear sets (1, 2), at least one brake (B) and two clutches (C, E), wherein the first clutch (C) is connected with a first element (11) of the first planetary gear set (1),the second clutch (E) is connected to at least one element (12, 32) of the second planetary gear set (2), and the brake (B) is connected with a second element (31) of the first planetary gear set (1).The two clutches (C, E) are axially arranged between the first and second planetary gear sets (1, 2), the second clutch (E) being arranged axially directly adjacent to the second planetary gear set (2), and the first planetary gear set (1), out of all of the gear-forming planetary gear sets (1, 2, 3, 4) of the transmission (G), has the largest axial distance from the front side of the transmission (G), that has an interface for connecting the transmission (G) to a drive unit (VM) on the outside of the transmission. The two clutches (C, E) are arranged axially directly adjacent to each other,and the brake (B) is arranged, at least in sections, radially outside the second clutch (E), The invention also relates to a drive train for a motor vehicle comprising such a transmission (G).

The invention discloses a three-channel microwave rotary joint which comprises a single-waveguide rotor, a double-waveguide rotor, a double-waveguide stator, a single-waveguide stator, a first bearing, a second bearing, a first connection arm, a second connection arm, a first inner conductor, a second inner conductor and a third inner conductor. According to the three-channel microwave rotary joint, the axial distance is short, the signal transmission loss is reduced, the problem of multi-channel Ka frequency band signal transmission is solved, the transmit-receive insulation degree is good, double-bearing design is adopted, coaxiality is guaranteed through precise machining and assembling, electrical performance fluctuation generated in the rotating process is greatly lowered, and the reliability of spacecraft moving components is improved.

The invention relates to an arrangement structure of a gearbox gear shaft system. The structure comprises an input shaft, and two output shafts which are parallel to the input shaft and are positioned on the two sides of the input shaft, wherein the input shaft is fixedly provided with driving gears; driven gears are sleeved on the output shafts and are meshed with the driving gears; a fourth driven gear and a sixth driven gear are meshed with a fourth and sixth driving gear simultaneously; a third driven gear and a fifth driven gear are meshed with a third and fifth driving gear simultaneously; and a reverse gear connecting device is arranged on one output shaft. Through the structure, an inner space is reasonably utilized, a synchronous connecting device has enough installation space, axial positions are approximately the same, the structure has a balanced layout, and the axial distance is short.

The invention discloses an outer-rotor submersible tubular pump which comprises a guide vane body, an impeller housing, an outer rotor, a water filling type submersible motor stator and a water sucking chamber. The outer rotor is of an integrated structure and comprises a water filling type submersible motor rotor, a hub body and an impeller. An impeller is welded and fixed to the water filling type submersible motor rotor, and the water filling type submersible motor rotor is rigidly connected with the hub body to form a whole. The water filling type submersible motor stator is built in the inner cavity of the outer rotor. The whole structure of the pump has the advantages of being short in axial distance, compact in structure, light in weight, safe, reliable and the like, the water filling type submersible motor stator is creatively built in the inner cavity of the motor rotor, meanwhile the phenomenon that rotation of an integrated rotor of a submersible electric pump with a built-in impeller in water causes larger frictional loss is avoided, and the water pumping efficiency is greatly improved.

A fuel injector for internal combustion engines, comprising: - a housing (16), - a valve guide (38) fixed at a lower end of said housing (16), the valve guide (38) having a longitudinal guide bore (44) and a chamber (46) provided with a valve seat (50), said chamber (46) being connected to a fuel supply duct (22,48); - an atomizer (56) fixed at a lower end of said valve guide (38), the atomizer (56) having a longitudinal bore (80) in flow connection with said chamber (46), the atomizer having a plurality of nozzle bores (82) having inlet openings (84) facing into said longitudinal bore (80); - a spindle (88) having a valve portion (92) cooperating with said valve seat (50), and a cut-off element (94) extending into said longitudinal bore (80) of the atomizer (56), wherein an upper cut-off section (102) and a lower cut-off section (106) axially spaced apart from each other are defined between the outer surface of the cut-off element (94) and the inner surface of the longitudinal bore (80), cut-off sections (102,106) being both closed in the closed position of the spindle (88), the cut-off element (94) having a central duct (112) in flow connection with the longitudinal bore (80) of the atomizer (56) both above the upper cut-off section (102) and below the lower cut-off section (106).

The invention discloses a delta 3D printer. The delta 3D printer comprises three vertical columns with sectional material structures, a control panel, a switching power supply, a display screen and a printed finished product connection seat, wherein an upper support plate is arranged at the upper ends of the vertical columns with the sectional material structures; a lower support plate is arranged on the lower parts of the vertical columns with the sectional material structures; a wire feeding motor is arranged on the upper support plate; printing head drive motors are arranged on the upper end surface of the lower support plate; each printing head drive motor is connected with a printing head connection disc; each printing head connection disc is connected with a slide block with linear bearings through parallel arms; each linear bearing is matched with a vertical polished rod; the upper end of each vertical polished rod is connected with the upper support plate, and the lower end of each vertical polished rod is connected with the lower support plate; a support with a bent structure is arranged on the upper end surface of the lower support plate; the control panel is horizontally connected with the support; the display screen is connected with the support; and the printed finished product connection seat is connected with the vertical columns with the sectional material structures. The delta 3D printer disclosed by the invention is low in manufacturing and maintenance costs, convenient to disassemble and assemble, convenient to adjust and repair, high in use safety and reliability, and easy to ensure the quality of the printed products.