61results about How to "Reduce radial deformation" patented technology

Methods and apparatus for conveying fluids (e.g., liquids, gases, and mixtures thereof) are disclosed. A turbopump in accordance with an exemplary implementation of the present invention comprises an impeller defining at least one flow channel and a shroud defining an opening communicating with the at least one flow channel. In certain advantageous implementations, at least one inlet partial of the impeller extends into the opening defined by the shroud. The at least one inlet partial may advantageously be capable of supporting the opening in the shroud. In some cases, the impeller may include a plurality of these inlet partials.

The invention discloses a manufacturing process for a high-strength corrosion-resistant aluminum alloy forged piece. The process comprises the following steps of material preparation, heating, multi-axial forging, mechanical machining, heating, trestle bearizing, heating, ring rolling, mechanical machining, annealing, solid-solution water-quenching, cold pressing deformation, aging and the like. The aging treatment method comprises the steps of first-grade aging, specifically, a ring forged piece subjected to cold pressing is put into a furnace at the room temperature and heated to 90-110 DEGC, heat preservation is performed for 1-3 hours, and air cooling is performed; second-grade aging, specifically, the ring forged piece is put into the furnace when the temperature is reached, heat preservation is performed for 4-8 hours at the temperature of 150-160 DEG C, and air cooling is performed after aging is ended.

The invention discloses a casing structure with leaf apex interval control and leaf tip flow control. A turbine casing and an impact plate form a first cavity, multiple impact holes are limited in the impact plate, a turbine outer ring form a second cavity, multiple turbulent structures, and an air film hole structure and a leak-proof structure are limited on the outer ring; cold air flow enters the first cavity through an air incoming hole, enters the second cavity through an impact hole structure to impact the outer ring, fully cools the turbine outer ring through the turbine structures and flows out from the air film hole structure of the outer ring to form a cooling air film to be finally mixed with main fuel gas; a boss structure on the turbine outer ring is mainly used for blocking formation and development of leaf tip leakage vortex. Heat exchange effect of cooling airflow inside the casing is enhanced, the air film hole structure has good cooling effect on the surface of the turbine casing and a leaf tip position in direct contact with high-temperature fuel gas, the leakage-proof structure effectively lowers leaf tip leakage loss, and turbine efficiency is improved.

The invention discloses a mining type flameproof submersible motor, comprising a left end cover and a right end cover; a tube-shaped engine base is hermetically fixedly connected between the left and right end covers, the engine base is internally provided with a stator core, the stator core is internally provided with a rotor, and the output shaft of the rotor stretches out the left end cover; one end of the engine base is hermetically connected with a cable outlet device, the cable of the stator core is led out by the cable outlet device; the upper part of the engine base is provided with a forced cooling fan, the air outlet of the forced cooling fan is provided with a duct, and the outlet of the duct is arranged corresponding to the right end cover. The invention has compact structure, the tube-shaped engine base is hermetically fixedly connected with the left and right end covers, and the tube-shaped engine base is hermetically connected with the cable outlet device, so that the mining type flameproof submersible motor has good sealing property and is applicable to underwater use. The invention has less vibration when in operation and good heat dissipation effect, the existing permeable disaster relief device is not required to be used when the invention is adopted, and cost is greatly saved.

A spark plug includes a tubular metallic shell extending in the direction of an axis and having a tool engagement portion formed through extrusion. The tool engagement portion has a 12-point shape which is a sectional shape taken orthogonally to the axis and has a plurality of protrusions and recesses provided alternately. As viewed in a section taken orthogonally to the axis, when D (mm) represents the diameter of a circle which passes radially through the outermost positions on the protrusions, and d (mm) represents the diameter of a circle which passes radially through the innermost positions on the recesses, the relational expression 0.45≦(D−d)/2≦0.75 is satisfied. The spark plug can provide a more reliable restraint on the slippage of a tool at the time of mounting and enables the tool engagement portion to be reliably formed so as to form a desired shape.

A rim (2) for a bicycle spoked wheel (1) is disclosed, comprising spoke attachment areas (6) and infra-spoke areas (7), wherein the radial section of the rim in a central part (8) of the infra-spoke areas has a greater moment of inertia than the radial section of the rim in lateral parts (9) of the infra-spoke areas (7). It is thus possible to increase the stiffness of the rim (2) to counteract the daisy effect.

In the tire with an additional cap layer according to the present invention, at least one additional cap layer is added between the second belt layer and the third belt layer to improve the resistance to deformation and tearing of the area under load and pressure ability. That is, at least one additional cap layer is respectively lined between the cushion rubber, the two sides of the third belt layer and the tread rubber. On both sides of the tire circumference, the additional cap layer is wound on the sides of the third belt layer and the second belt layer at 360° respectively, so as to optimize the ground contact shape of the tire, improve the safety performance of the use, and effectively solve the problem of the belt Layer delamination, tearing problems.

The invention discloses a combined type buckle arrestor for a fiber-reinforced composite flexible pipe. The combined type buckle arrestor comprises a metal outer lantern ring and a fiber-reinforced inner lantern ring; the metal outer lantern ring comprises a main lantern ring body, a locking lantern ring body and an elastic seal gasket; the fiber-reinforced inner lantern ring comprises a fiber-reinforced layer and a base body protection layer; the fiber-reinforced inner lantern ring is located on the outer side of the composite pipe and bonded with the composite pipe in a hot-melting mode, thus, the pipe is locally thickened so as to achieving promoting of buckling resistant capacity; and the metal outer lantern ring wraps the fiber-reinforced inner lantern ring in an interference fit modeso that the fiber-reinforced inner lantern ring can be assisted in achieving of buckling arresting, and meanwhile, the composite pipe can be prevented from being bent excessively by means of the gooddeformation resistant performance of the metal outer lantern ring, so that stress concentration of the fiber-reinforced inner lantern ring is reduced. The bonding characteristic of materials of the composite pipe is reasonably utilized to achieve machining of the fiber-reinforced inner lantern ring, and the fiber-reinforced inner lantern ring is assisted by the metal outer lantern ring so as to improve the local structural strength; and the combined type buckle arrestor has the advantages of both a steel pipe welding type buckle arrestor and a steel pipe buckling-pressing type buckle arrestorand has wide popularization value and practical value.

The invention discloses a variable pitch system of a wind power generation set and the wind power generation set. The variable pitch system of the wind power generation set comprises a wheel hub, a variable pitch bearing and a variable pitch driver. The variable pitch bearing comprises an outer ferrule and an inner ferrule. The outer ferrule is connected to the wheel hub, and the inner ferrule isconnected to a blade. A variable pitch bearing gear is arranged on the variable pitch bearing. The variable pitch driver is mounted in a selected area and is engaged to a gear of the variable pitch bearing through a gear of the variable pitch driver. The selected area is an area where the radial deformation of the outer ferrule and the inner ferrule is smaller than a preset value. According to thetechnical scheme provided by the invention, the variable pitch driver is mounted in the area where the radial deformation of the outer ferrule and the inner ferrule of the variable pitch bearing is smaller than the preset value. When the variable pitch bearing operates, as the variable pitch driver is mounted in the area where the radial deformation of the outer ferrule and the inner ferrule is relatively small, an opening when the gear of the variable pitch driver is engaged to the gear of the variable pitch bearing can be reduced to the greatest extent, so that wear between the gear of thevariable pitch driver and the gear of the variable pitch bearing can be reduced.

The invention discloses an intermediate support structure for improving rigidity and shock absorption, which comprises an upper bracket, a lower bracket, a rubber pendant and a bearing. The pendant is ring-shaped, and the outer ring surface of the rubber pendant is clamped in the circular space formed by the fastening of the upper bracket and the lower bracket. The inner ring surface of the rubber pendant is provided with a first groove, The bearing is assembled and arranged in the first groove, and protruding ribs are uniformly arranged between the inner ring surface and the outer ring surface of the rubber pendant. The intermediate support structure for lifting stiffness and shock absorption of the present invention avoids the aggravation of the vibration of the rear axle, transmission system, and vehicle body due to the vibration of the transmission shaft and the intermediate support structure, and avoids coupling with the road surface excitation, which will cause vibration to the entire vehicle at low and high speeds. The noise has been significantly improved to achieve the purpose of reducing vibration and noise.

The invention discloses a milling machine fixture. The milling machine fixture comprises a fixing base, a positioning flat key, a rotating hand wheel, a supporting plate, a locking bolt, a bearing bush, a main movable block rotating shaft, a main movable block body, a main movable block push rod, a main movable block positioning element, connecting shafts, auxiliary movable block rotating shafts, auxiliary movable block bodies, auxiliary movable block push rods, auxiliary movable block positioning elements, a pressing disc, a pressing support, a pressing hand wheel, a fixing bolt, a long connecting rod and a short connecting rod. By the adoption of the design, when thin-wall sleeve type parts are positioned, the positioning precision is improved, radial deformation is reduced in the clamping process, the machining precision is improved, the number of the connecting shafts and the number of auxiliary movable blocks can be flexibly selected, and the milling machine fixture can be suitable for the thin-wall sleeve type parts with different length sizes.