38results about How to "Reduce load bearing" patented technology

A reinforcing plate is provided between an inner central portion that structures a portion of a connecting member and a rear end portion of a dash cross-member. The reinforcing plate is a wrought member and is joined (at a join portion) to both the inner central portion and a rear wall portion of the dash cross-member via joining members. Because the wrought member has high tensile strength, when the reinforcing plate is provided at the join portion of the connecting member, a tensile load acting on the join portion may be borne by the reinforcing plate, and breakage of the connecting member may be suppressed. Therefore, an impact load transmitted from a front side member through the connecting member may be transmitted to the dash cross-member and rockers.

The invention relates to a self-supporting friction stir welding method with unequal diameters of upper and lower shaft shoulders and a stirring head thereof, and relates to the self-supporting friction stir welding method and the stirring head thereof. The invention aims to solve the problem that the diameters of the upper and lower shaft shoulders are equal and the problem that large heat inputof welding and bearing of a stirring pin influence the joint performance and even cause the rupture of the stirring pin in the conventional elf-supporting friction stir welding method. The method comprises the steps of: 1, determining the size of the stirring head; 2, determining the using length of the stirring pin; 3, fixing a first work piece to be welded and a second work piece to be welded; 4, positioning the stirring head; and 5, performing the stir friction welding on the first work piece to be welded and the second work piece to be welded. The stirring head and the stirring pin are vertical to the lower end face of the upper shaft shoulder; the stirring pin and the upper shaft shoulder are integrated into a whole; the outer surface of the stirring pin is provided with external threads; the lower shaft shoulder is in threaded connection with the stirring pin; a nut is arranged under the lower shaft shoulder; the nut is in threaded connection with stirring pin; and the diameter of the lower shaft shoulder is less than that of the upper shaft shoulder. The elf-supporting friction stir welding method with unequal diameters of upper and lower shaft shoulders and the stirring head thereof are used for stir friction welding.

The invention relates to a tractor intelligent control method and an intelligent control system. A corresponding signal is collected by a sensor to obtain an existing operating state of a tractor, all parameters are calculated, analyzed and judged by a controller on the basis, and after information is processed, control signals are transmitted to a stepping motor and a high-speed electromagnetic valve so as to enable a main clutch, a PTO clutch, and a brake pedal executing mechanism, an engine throttle draw bar executing mechanism, a hydraulic hanging mechanism and the like to conduct motion to prevent a driving wheel of the tractor from excessive trackslip and overload of a transmission system, ensure good comfort, fuel economy and traction, and prolong service life of the transmission system and tires of the tractor.

The invention relates to the technical field of metal plastic forming technology and equipment, and provides a circumferential direction feeding device for cross wedge rolling, comprising a feeding unit and an arc-shaped slide rail; the feeding unit includes a feeding groove and a feeding plate, and the feeding groove Preferably, it is directly opened on the roll of the cross wedge rolling mill, which can reduce the width of the splicing plate; the splicing plate is welded on the roller shaft and is guaranteed to be tangent to the bottom of the splicing groove, which is convenient for the placement of the blank; the front end of the splicing plate has A small arc is used to ensure the safety of loading, and the width of the feeding plate should avoid collision with the guide plate at the lower point. The arc-shaped slide rail is composed of two tangent arcs, which can make the billet slide smoothly to the lower roller. The device of the invention is a non-continuous feeding device, that is, each time the rolling is completed, the rolls must stop at the feeding position to complete the next charging and then rolling, which is especially suitable for feeding large shafts; device structure Simple, good stability, convenient feeding, saves the space of the equipment, and has broad application prospects.

The invention discloses a blade stretching structure for a wind driven generator. The blade structure is a stretching structure; a port of a first blade section, connected with a second blade section, is provided with a cross section with four sections of foldable blades; the four sections of foldable blades are connected with a steel longitudinal beam through elastic hinges; simultaneously, contact surfaces among the four sections of foldable blades and contact surfaces between the four sections of foldable blades and the second blade section are slope-shaped; the steel longitudinal beam is arranged inside the first blade section and two screw rod holes are formed inside the first blade section; and one end of a screw rod is connected with the screw rod holes inside the first blade section, and the other end of the screw rod is connected with the tail end of the second blade section, namely, a motor on a blade root, through a gear. Energy capture of a wind wheel can be reduced so as to keep power output close to a rated value. Simultaneously, load borne by the blade and impact on the entire wind machine are reduced and the wind machine is prevented from being damaged due to stall. The structure can automatically adjust the windward area of the blade so as to enlarge economical wind speed range of the wind driven generator and make full use of wind energy.

The invention provides a drawer-sliding rail backstepping control device. The backstepping control device comprises a drawer main body and wheel type rolling sliding rails connected with a cabinet body; the wheel type rolling sliding rails include a fixed sliding rail arranged on the inner wall of the cabinet body, and a movable sliding rail arranged on the a drawer main body is arranged on the fixed sliding rail in a sliding way; the drawer main body is formed by assembling a front plate, metal side plates, a rear plate and a bottom plate together, the front plate is connected with the metalside plates through a detachable connecting base, the movable sliding plate is fixed at the middle parts of the metal side plates, a rebound part is arranged on the cabinet body or the fixed sliding rail or between the cabinet body and the fixed sliding rail, the metal side plates or / and the movable sliding plate are provided with shifting blocks for driving the rebound part to move. By the adoption of the invention, the problem that the installation of the rebound part occupies a large space in the prior art can be solved, the load borne by the rebound part is reduced, less installation process steps are implemented, installation time is reduced, and working efficiency is improved; and the backstepping control device has the characteristics of simple and reasonable structure, operation convenience, long service life and convenience for processing and production.

The invention relates to the technical field of hydropower generation, in particular to a solution for a bridge-suspended turbine hydropower generation base station, comprising a load-bearing bridge, a power generation element lifting device, a flow monitoring device, a power generation element, an underwater fixing device, a power generation element protective casing, and an electric energy collection device. device. The load-bearing bridge is built on both sides of the river, the protective shell of the power generation element is welded in the center of the bridge deck, the underwater fixing device is installed in the cavity of the bridge deck and connected to the waterproof airtight shell welded in the center of the bridge deck, and the lifting device of the power generation element is fixed on the inside of the protective shell. , the generator is protected in a waterproof airtight casing and fixed on both sides of the load-bearing structure, the load-bearing structure is connected with the lifting system through ropes, and the flow monitoring device is fixed on both sides of the generator protective casing. The invention provides a power generation system that is easy to maintain and can make full use of river water to generate electricity, and has the advantages of wide application range, convenient maintenance, guaranteed strength, low cost, high power generation efficiency and environmental protection.

The invention relates to a method for testing mechanical properties of an electronic gun heater assembly, comprising the following steps: (1), taking at least two heater assemblies under detection; (2), marking an original scale distance on a heater of each heater assembly under detection, and determining original scale distances L0 and S0; (3), testing yield strength Sigma0.2 and tensile strength Sigmab of the heater assemblies under detection in an actual vacuum environment at different temperatures; (4), establishing a change-with-temperature linear relationship of the yield strength Sigma0.2 and tensile strength Sigmab of the heater assemblies under detection by linear fitting; (5), according to the linear relationship, calculating to obtain the yield strength Sigma0.2 and tensile strength Sigmab of the heater assemblies under detection at the actual operation temperatures. The method enables chemical tensile performance parameters of a heater or a combination of a heater with a platinum sheet and / or a cathode head in a vacuum high-temperature operating environment to be accurately measured, and the testing problem of engineering needs is solved.