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31results about How to "Improve load conditions" patented technology

Ball stopper applied to high-temperature gas-cooled reactor

The invention provides a ball stopper applied to a high-temperature gas-cooled reactor. The ball stopper comprises a box body assembly, a power part, a magnetic transmission device, a rotor assembly and a shield, wherein the box body assembly comprises a box body with ball through holes and a rotor sink hole in the surface, as well as a ball inlet pipe and a ball outlet pipe which are connected with the box body; the ball through holes, the ball inlet pipe and the ball outlet pipe are coaxial and isometric and are perpendicular to the rotor sink hole; the rotor assembly comprises a bearing and a rotor; the rotor is supported in the rotor sink hole of the box body through the bearing and connected with an inner magnetic assembly of the magnetic transmission device; the rotor is provided with a rotor through hole; the diameter of the rotor through hole is the same as that of each of the ball through holes, the ball inlet pipe and the ball outlet pipe and is greater than that of a spherical element; the shield is connected with a bracket of the magnetic transmission device; the power part is arranged in the shield and connected with the bracket of the magnetic transmission device through a shaft coupler assembly. According to the ball stopper, the stopping and running functions can be performed on single column of spherical elements, and the operating reliability requirements of long-term intermittent running can be met.
Owner:TSINGHUA UNIV

Formwork jacking tool for constructing post-cast strip of cast-in-place slab and formwork supporting construction method

The invention discloses a formwork jacking tool for constructing a post-cast strip of a cast-in-place slab and a formwork supporting construction method. The formwork jacking tool for constructing the post-cast strip of the cast-in-place slab comprises a jack, an adjustable supporting nut, at least one bracket and an adjustment nut. The jack comprises a screw and a supporting plate A arranged at the top end of the screw, wherein nail holes are formed in the supporting plate A. The adjustable supporting nut comprises a nut body, wherein two supports are symmetrically arranged on the outer side of the nut body, sliding grooves which are arranged in the axial direction of the nut body are formed in the supports, and a U-shaped clamping ring which is connected with the corresponding support is arranged on the outer side of each sliding groove. Each bracket comprises a dorsal rib which is in the shape of a right trapezoid, a supporting plate B is fixed to the big end of the right-trapezoid-shaped dorsal rib, and sliding rails are arranged on the two side faces of the dorsal rib respectively. The brackets are connected with the sliding grooves in the supports in a matched mode through the sliding rails, the U-shaped clamping rings are matched with the oblique edges of the dorsal ribs of the brackets so as to fasten the brackets, the adjustable supporting nut is connected with the screw of the jack in a matched mode through the nut body, and the adjustment nut is connected to the lower portion of the screw through threads.
Owner:SHANDONG SANJIAN CONSTR ENG MANAGEMENT +1

Light MMC motor driving system topology and modulation method thereof

The invention discloses a light MMC motor driving system topology and a modulation method thereof, and belongs to the field of power electronic converters. The topology comprises a modular multilevel converter structure, a plurality of half-bridge and capacitor structures, a plurality of additional half-bridge structures, a plurality of three-winding high-frequency transformer structures and three-phase bridge arms; the half-bridge, the capacitor structure and the additional half-bridge structure form a novel sub-module; the three-winding high-frequency transformer structure enables all novel sub-modules to be interconnected together; each phase of bridge arm in the three phases of bridge arms is divided into an upper bridge arm and a lower bridge arm, each phase of upper bridge arm comprises n novel sub-modules and upper bridge arm inductors Larm1, Larm3 and Larm5, and each phase of lower bridge arm comprises n novel sub-modules and lower bridge arm inductors Larm2, Larm4 and Larm6; and a power coupling channel open-loop synchronous modulation method is adopted. According to the invention, sub-module capacitor voltage fluctuation in a motor operation full rotation speed range can be suppressed, and system common-mode voltage is reduced to a certain extent.
Owner:YANSHAN UNIV

A construction method for post-casting belt formwork of cast-in-place slabs by using formwork jacking tools

The invention discloses a formwork jacking tool for constructing a post-cast strip of a cast-in-place slab and a formwork supporting construction method. The formwork jacking tool for constructing the post-cast strip of the cast-in-place slab comprises a jack, an adjustable supporting nut, at least one bracket and an adjustment nut. The jack comprises a screw and a supporting plate A arranged at the top end of the screw, wherein nail holes are formed in the supporting plate A. The adjustable supporting nut comprises a nut body, wherein two supports are symmetrically arranged on the outer side of the nut body, sliding grooves which are arranged in the axial direction of the nut body are formed in the supports, and a U-shaped clamping ring which is connected with the corresponding support is arranged on the outer side of each sliding groove. Each bracket comprises a dorsal rib which is in the shape of a right trapezoid, a supporting plate B is fixed to the big end of the right-trapezoid-shaped dorsal rib, and sliding rails are arranged on the two side faces of the dorsal rib respectively. The brackets are connected with the sliding grooves in the supports in a matched mode through the sliding rails, the U-shaped clamping rings are matched with the oblique edges of the dorsal ribs of the brackets so as to fasten the brackets, the adjustable supporting nut is connected with the screw of the jack in a matched mode through the nut body, and the adjustment nut is connected to the lower portion of the screw through threads.
Owner:SHANDONG SANJIAN CONSTR ENG MANAGEMENT +1

A burnup measurement locator for high temperature gas-cooled reactor

ActiveCN103778981BFlexible switching onSwitch conductionNuclear energy generationNuclear monitoringGear wheelDetent
The invention provides a burnup measuring and positioning device applied to a high-temperature gas cooled reactor. The burnup measuring and positioning device applied to a high-temperature gas cooled reactor comprises a power component, a magnetic driver, a box body component, a rotor component and a shield, wherein the box body component consists of a box body as well as a ball charge pipe and a ball discharge pipe which are welded on the box body and are coaxial and equal in diameter; the box body is provided with a ball passing through hole, a rotor counter bore and a collimation counter bore; the ball passing through hole has the diameter of 61mm; one ends, which are communicated with the ball passing through hole, of the ball charge pipe and the ball discharge pipe are reducing sections; the rotor component comprises a rotor and bearings; a rotary drum of the rotor is provided with a ball passing through hole and a ventilation hole; the top of the ventilation hole is provided with a conical surface ball stop socket, and the bearings are made by heat-resistant and abrasion-resistant alloy; the power component consists of an alternating-current servo motor with a rotary transformer and a planetary gear speed reducer. The burnup measuring and positioning device provided by the invention can start and stop frequently and perform receiving, ball stopping, positioning and measurement and transmitting rapidly, stably and accurately, is compact in structure, and can guarantee the reliability requirement of long-time running.
Owner:CHINERGY CO LTD

Four-branch three-freedom-degree redundant drive type parallel machining head

The invention discloses a four-branch three-freedom-degree redundant drive type parallel machining head. The four-branch three-freedom-degree redundant drive type parallel machining head comprises anelectric spindle, a machining table, a frame, three same drive branches and a redundant drive branch. Each drive branch comprises a first motor-speed reducer module, a first rotary disc, a first connecting rod, a first hinge base and a second hinge base, wherein the first motor-speed reducer module rotationally drives the first rotary disc through a fifth revolute pair, a pair of lug shafts are arranged on the two sides of the edge of the first rotary disc, the first rotary disc is hinged to one end of the first connecting rod through a fourth revolute pair, the other end of the first connecting rod is hinged to the first hinge base through a third revolute pair, the first hinge base and the second hinge base are hinged through a first revolute pair and a second revolute pair, and the rotation axes of the first revolute pair, the second revolute pair and the third revolute pair are mutually orthogonal. By means of a redundant drive structural manner, the load status of a driver can beimproved, the bearing capacity is high, and the overloading problem of the driver when large complex workpieces are machined is avoided.
Owner:CHINA ACAD OF AEROSPACE AERODYNAMICS

Connection structure of frame front pillar, front beam and longitudinal beam of three-dimensional garage

The invention discloses a connection structure of a frame front pillar, a front beam and a longitudinal beam of a three-dimensional garage, which comprises the front pillar, the front beam and the longitudinal beam which are vertical to one another pairwise and is characterized by also comprising a first connector and a second connector, wherein a first through hole is formed on the circumferential face of a first boss, a first mounting hole is formed on the front beam, and a first fastener is inserted into the first through hole and the first mounting hole; a second through hole is formed onthe circumferential face of the first boss, a second mounting hole is formed on the front beam, and a second fastener is inserted into a second connection hole, the second through hole and the secondmounting hole; a third through hole is formed on the circumferential face of a second boss, a third mounting hole is formed on the longitudinal beam, and a third fastener is inserted into the third through hole and the third mounting hole; and a fourth through hole is formed on the circumferential face of the second boss, a fourth mounting hole is formed on the longitudinal beam, and a fourth fastener is inserted into the fourth through hole and the fourth mounting hole. Compared with the prior art, the connection structure is convenient to assemble and high in connection precision; and the first and second connectors are fixed in two directions respectively to control the deformation of connection parts in two degree-of-freedom directions and guarantee the operation accuracy and use safety of the garage.
Owner:朱建华

Lifting and moving combined movable steel bridge

The invention relates to a lifting and moving combined movable steel bridge. The bridge is mainly composed of a lifting bridge body, a moving bridge body, a hydraulic cylinder, a walking trolley, a counterweight body, an anchor device and a basic embedded part; a navigation hole is formed in one side of the moving bridge body, the lifting bridge body is arranged on the other side of the moving bridge body, the hydraulic cylinder is installed on the lower portion of the lifting bridge body, the moving bridge body is composed of an active bridge, a slave bridge and a connecting hinge pin, and the walking trolley, the anchor device and the counterweight body are arranged on the active bridge. In the drive-through state, the moving bridge body is erected above the navigation hole, the liftingbridge body falls down, and a flat pavement is formed; in the navigation state, the lifting bridge body is jacked, the moving bridge body retracts to the portion below the lifting bridge body, and navigation clearance is achieved. Accordingly, the bridge has the advantages of being good in trafficability, convenient to install and maintain, good in equipment protectiveness under high wind and thelike in technology, has the advantages of being small in occupied area, simple and attractive in building and the like in arrangement, and has the advantages of being capable of greatly reducing civilengineering capacity and effectively shortening the construction period in economic.
Owner:浙江省水利水电勘测设计院有限责任公司

A large box-type device that requires the top cover to be opened

The invention discloses a large-scale box-type equipment that needs to be opened with a top cover, which includes a box body, a top cover, a cover opening hinge and a cover opening drive assembly, the top cover is connected to the box body through the cover opening hinge, and the cover opening hinge includes a connecting rod and the first hinge shaft; the cover-opening drive assembly includes a cover-opening mechanism, a base and a support, the cover-opening mechanism includes an electric push rod and a drive shaft, the base is installed on the top cover and the support is installed on the box One end of the electric push rod is hinged on the base through the second hinge shaft and the other end is hinged on the inner wall of the box body through the third hinge shaft, the third hinge shaft, the second hinge shaft and the first hinge shaft The hinge axes are parallel to each other and they are distributed in a triangle, so that the top cover on the box body is opened when the electric push rod is extended and the top cover is covered on the box body when shortened. The invention can conveniently open the top cover through the movement of the electric push rod of the cover opening mechanism, especially when the top cover is relatively heavy, the opening of the electric push rod can effectively reduce the labor intensity.
Owner:HUBEI SANJIANG AEROSPACE WANFENG TECH DEV

A Parallel Mechanism with Motion Bifurcation Characteristics

The invention discloses a parallel mechanism with motion bifurcation characteristics, which relates to the field of mechanics and robot technology, and includes a fixed platform, a moving platform, two first branch chains, a second branch chain and a third branch chain; The two sides are respectively connected with the bottom end of a first branch chain, and the two sides of the moving platform are respectively connected with the top end of a first branch chain; one end of the fixed platform is connected with the bottom end of the second branch chain, and the One end is connected with the top of the second branch chain; the other end of the fixed platform is connected with the bottom end of the third branch chain, and the other end of the moving platform is connected with the top of the third branch chain. In the initial position, when the dynamic platform is parallel to the fixed platform and the second rotating pair is parallel to the fixed platform, it has two rotational degrees of freedom and two moving degrees of freedom. When only the second rotating pair is driven, the third branch chain is subject to two constraints. The force limit is 2R1T mode; after returning to the initial configuration, when only the third revolving pair is driven, the third branch chain is subject to a constraint force and a constraint force couple, which is 2T1R mode.
Owner:YANSHAN UNIV
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