145results about How to "Reduce overturning moment" patented technology

The invention provides an active damping system which comprises a pedestal, a main substrate, damping units and a control system and which is characterized in that: the number of the damping units is at least three; the damping units are arranged at the same included angle around a center and uniformly distributed on the same circumference; the bottom ends of the damping units are positioned on the pedestal and the top ends of the damping units are positioned on the main substrate; the control system is connected with the damping units to receive vibration signals from the damping units and feedback a control signal. According to the path planning of the moving parts such as the mask table and the working table on the main substrate, the preview control module generates the position information of each moving part within a future time period; integrates the current position information and the position information within the future time period of each moving parts; calculates a preview compensation control signal by means of the preview control algorithm; superposes the preview compensation control signal to the damping feedback control signal; and actuates the active damping system. The active damping system has the advantages of small power, low energy consumption and high damping accuracy.

The invention discloses a double-flexible-grinding-head magnetorheological polishing device. In the device, a vertical gantry of a bed body and an X-axis are both fixed on a horizontal base; a worktable is fixed on a sliding block of the X-axis; a Y-axis is fixed on a horizontal beam of the vertical gantry; and a first Z-axis and a second Z-axis are arrangedon the Y-axis in parallel. A large flexible grinding head is installed on the first Z-axis; and a small flexible grinding head is arranged on the second Z-axis. A high-flow circulation system connected with the large flexible grinding head and a low-flow circulation system connected with the small flexible grinding head are arranged on a trolley. A control cabinet is arranged at the rear part of the vertical gantry; and a circulation system cabinet and a cleaning system are arranged at the side surface of the vertical gantry. The double-flexible-grinding-head magnetorheological polishing device provided by the invention has the advantages of high accuracy, high rigidness, high stability and high dynamic property. The double-flexible-grinding-head magnetorheological polishing device not only can be used for processing of large-caliber phase elements, but also can be used for high-accuracy processing of large-caliber planar optical elements within the range of full caliber. The optimal matching of the processing efficiency and the processing accuracy can be realized.

The invention discloses two negative pressure adsorption type feet of a wall-climbing robot. Two foot modules are fixed to the same axis. During movement, the rear foot can directly step over the front foot and is adsorbed to the wall face to become the front foot, the single-step crossing distance during circulation movement is large, and the movement is flexible. Thigh joint motors of the robot are located below thigh connecting rods. The two thigh connecting rods are connected with the two thigh joint motors, and the other ends of the thigh connecting rods are connected with two ankle joint motors at the upper portions of the cavity feet respectively. Sealing washers are inlaid in the inner sides of concave shells of the cavity feet. Air nozzles are arranged inside cavities of the bottoms of the cavity feet. The upper portions of the cavity feet are provided with vacuum pumps and connected with the air nozzles through a three-way joint. The other end of the three-way joint is connected with an air inlet valve. The ankle joint motors are fixedly connected with foot steering motors. The foot steering motors are connected with the shells of the cavity feet. When the robot moves, the single-step crossing distance is twice larger than the length of the shells of the cavity feet, and the robot can meet the requirement of reducing the torque of the movement legs on the whole robot by controlling the circulation movement of the thigh connecting rods.

The invention discloses a hanger articulated bridge inspection vehicle, belonging to bridge maintenance and construction equipment. The hanger articulated bridge inspection vehicle comprises a frame chassis (21), a suspension arm is a C-type hanger (25), the frame chassis (21) is articulated with the lower end of a pillar (23) by a longitudinal axis hinge (22) and a longitudinal axis, the upper end of the pillar (23) is articulated with the protruded end of an upper cross beam of the C-type hanger (25) by a transverse axis hinge (24) and a transverse axis, or the frame chassis (21) is articulated with the protruded end of the upper cross beam of the C-type hanger (25) by the longitudinal axis hinge (22) and the longitudinal axis, and the protruded end of a lower cross beam of the C-type hanger (25) is at least provided with a fixed point of a lifting rope (26) or a lifting rope extending-retracting device. According to the invention, the pulling force of the lifting rope (26) on an inspection platform (5) can be directly transferred to a bridge floor (2), therefore, the vehicle disclosed by the invention is small in overturning moment, light in structure and convenient to assemble and use, and can be erected on sidewalks on both sides of a bridge, so that the vehicle is especially suitable to be applied to the bottom detection and maintenance engineering of heavy traffic bridges.

The present invention discloses a vibration reaction force active balancing device for a vibration-acceleration test device. The vibration-acceleration test device comprises a centrifuge, a vibration table and a balancing weight; the vibration table and a balancing weight are respectively installed at two ends of the pivoted arm of the centrifuge; in the vibration reaction force active balancing device, an excitation electromagnet is fixedly installed at one end of the pivoted arm of the centrifuge and is located at the outer side of the balancing weight; a plurality of control electromagnets is installed at the position having the same height as the excitation electromagnet and is distributed around the rotation virtual circle of the excitation electromagnet; two force sensors are installed on the pivoted arm, signal output ends of the two force sensors are connected with a signal conditioner, a detection controller two power amplifiers in order, and the signal output ends of the two power amplifiers are respectively connected with the excitation electromagnet and the control electromagnets. The vibration reaction force active balancing device for vibration-acceleration test device performs active balance of vibration reacting force generated by a vibration table so as to realize a remarkable force balance effect and achieve the purpose of reducing the vibration of the main shaft of a centrifuge.

The invention relates to a slide sway type stereoscopic garage with shear forks. The slide sway type stereoscopic garage is characterized in that a track trolley is mounted onto tracks in a slidably connected manner, a portal frame is fixedly connected onto the track trolley, the track trolley is fixedly connected with one end of a first connecting rod of each shear fork by a first hinge support, the other end of each first connecting rod is connected with a rotary disc bracket by a third hinge support, one end of a second connecting rod of each shear fork is connected with a ground pulley by a second hinge support, the other end of each second connecting rod is connected with the rotary disc bracket by a slide hinge support, and an automobile pallet with a rotary disc mechanism is mounted on the rotary disc bracket, and the rotary disc bracket is timely meshed and connected with the portal frame by electromagnetic pins; a hoisting motor is mounted on the portal frame and can synchronously drive two winding drums, a steel wire rope is wound on the winding drums, the other end of the steel wire rope is connected with the rotary disc bracket, and the shear forks can be pulled, so that the automobile pallet can ascend or descend. The slide sway type stereoscopic garage has the advantage that problems of unreasonable stress structures of suspension arms, interference due to upright columns and perpendicular rope chains and the like can be solved by the aid of the slide sway type stereoscopic garage.

The invention discloses a mud scrapper applicable to a detention pool, comprising a track (2), a frame (3), wheels (4), a connecting rod mechanism (5) on the frame (3) and a rope (7); wherein each wheel (4) is rotatablely positioned at one side of a corresponding supporting plate (32) by an axle (41); the connecting rod mechanism (5) comprises at least two driven pulling rods (53) that pass through and are arranged at corresponding axles (41) respectively, at least two connecting plates (52) connecting a front and a rear driven pulling rods (53) and a driving pulling rod (51), in addition, the driving pulling rod (51) is pulled by the rope (7), the rope (7) parallels to the track (2), while the mud scrapper (6) is arranged at the bottom of the driven pulling rods (53). Compared with the prior art, in the invention the rope pulls the connecting mechanism and drives the mud scrapper arranged on the connecting mechanism to touch the bottom of the pool body, meanwhile, by the pulling of the rope, the frame can walk along the track, therefore, the mud scrapper can continuously scrap and collect the mud-like deposits at the bottom of the pool body.

The invention belongs to the technical field of designing a cutterhead of a fullface tunneling machine (or a fullface rock ripper or a tunnel shield), in particular relates to a method for the balanced arrangement of a positive rolling cutter and a transition rolling cutter on the cutterhead. The method draws a spiral line by establishing an auxiliary equation, and installs disk-shaped rolling cutters on the preformed locus circular crossing points of the spiral line and each disk-shaped rolling cutter according to a certain order. The arrangement method of the invention can lower the overturning moment of the cutterhead of a tunneling machine by 70 percent and the lateral unbalanced force by 50 percent, thereby effectively reducing the vibration and noise generated during the working of the fullface tunneling machine, improving the operational environment of construction personnel and improving the working reliability and the operation service life of the fullface tunneling machine.

The invention provides a sounding rocket launching device. The launching device adopts downward hanging type loading, a spiral elevator is used for lifting, and the advantages of full-automatic lifting and rotating functions, simple operation, high reliability and the like are achieved. The sounding rocket launching device comprises a base, a rotary device, the spiral elevator, a lifting arm, an auxiliary supporting device and a transverse supporting device. The rotary device is installed on the base, and the rotary device can rotate relative to the ground, so that the launching device has thefunction of automatically adjusting the azimuth angle; and a trunnion supporting seat is fixed to the rotary device, the lifting arm is in pin joint with the trunnion supporting seat, and a rocket ishorizontally loaded under the lifting arm in a mechanical downward hanging mode, so that the lifting and vertical launching of the rocket can be realized through the spiral elevator.

The invention discloses a multi-rotor wind generating system with suspenders. The multi-rotor wind generating system comprises a lower tower 1, a rotary driving device 3, wind turbines, an upper tower 2, ropes and / or connecting rods 8, beams 6, a cabin frame 7 and the suspenders 9, wherein the rotary driving device is arranged between the upper tower and the lower tower; two sides of the upper tower are connected with one end of each beam; the outer end and the middle part of the uppermost beam are connected with the top of the upper tower through the ropes and / or the connecting rods; outer ends of adjacent beams are connected through the ropes and / or the connecting rods; middle parts of the adjacent beams are connected through the ropes and / or the connecting rods; the upper ends of the suspenders are fixedly connected with the lowermost beam; the cabin frame is arranged on the upper tower; the wind turbines are arranged on the upper tower; and the wind turbines are fixedly connected with the top of the upper tower, the beams, the cabin frame or / and the lower ends of the suspenders. The multi-rotor wind generating system has the advantages of long service life, small floor area, low installation and maintenance cost, high reliability, wide application range, no rotary driving device in a cabin, and low bearing overturning moment.

The invention provides a knife holder of a machine tool. The knife holder comprises a knife holder housing (1), a bracket (5), a spindle (8), a spindle sliding plate seat (9), a spindle driving system (12), a knife shifting motor (13), and a knife core shaft (6) mounted between the bracket (5) and the spindle (8); a sliding guide rail (2) is only arranged on the knife holder housing (1); flat plate structures are arranged at the lower ends of the bracket (5) and the spindle sliding plate seat (9); the bracket (5) and the spindle sliding plate seat (9) are respectively supported on the sliding guide rail (2) through sliding blocks (3); a bracket locking mechanism (4) is mounted between the bracket (5) and the spindle sliding plate seat (9); and the knife shifting motor (13), a nut (10) and a lead screw (11) are arranged on the left side or the right side of the spindle sliding plate seat (9). By adopting the technical scheme provided by the invention, the knife holder used on a gear hobbing machine or a worm wheel gear grinding machine has the advantages of simple structure, high rigidity, high assembly manufacturability and high assembly precision, can effectively improve the processing precision of parts, and is suitable for dry / wet cutting processing.

The invention relates to the technical field of pesticide spraying devices, in particular to a multi-mode bidirectional pesticide spraying device. The multi-mode bidirectional pesticide spraying device comprises a pesticide spraying mechanism, a vertical adjusting mechanism for adjusting the pesticide spraying mechanism to move vertically, a horizontal adjusting mechanism for adjusting the vertical adjusting mechanism to move towards the left and the right and a mode switching mechanism for adjusting an angle of the pesticide spraying mechanism, wherein the pesticide spraying mechanism is connected with the vertical adjusting mechanism through the mode switching mechanism, and the lower end of the vertical adjusting mechanism is connected with the horizontal adjusting mechanism. The pesticide spraying mechanism, the vertical adjusting mechanism and the mode switching mechanism form two groups of pesticide spraying portions, and the two groups of pesticide spraying portions are symmetrically arranged on the horizontal adjusting mechanism. The multi-mode bidirectional pesticide spraying device can improve pesticide spraying efficiency, reduce the labor intensity of workers, can be aligned to a corresponding crown for pesticide spraying, reduces the influence of pesticides on land and the environment and is convenient to control and good in moving flexibility.

The invention discloses a leakproof dynamic pressure type valve plate, and relates to the technical field of engineering machines. The leakproof dynamic pressure type valve plate comprises a valve plate body with an oil suction opening and an oil pressing opening, a plurality of bending first micro type channels are arranged on the sealed end face of the valve plate body along the inner ring face of the inner side of the oil suction opening and the inner ring face of the inner side of the oil pressing opening, and a plurality of bending second micro type channels are arranged on the sealed end face of the valve plate body along the outer ring face of the outer side of the oil suction opening and the outer ring face of the outer side of the oil pressing opening. One ends of the first micro type channels are sealed, and the sealed ends extend towards the inner edge of the valve plate body to form openings. One ends of the second micro type channels are sealed, and the sealed ends extend towards the outer edge of the valve plate body to form openings. The rotating direction of the second micro type channels is the same as the counterrotating direction of the valve plate body, and the rotating direction of the first micro type channels is opposite to that of the second micro type channels. According to the valve plate, the problems that the amount of leakage between an existing dynamic pressure type valve plate and a plunger pump cylinder body is large, and the overturning moment of the cylinder body is large are solved, the volume efficiency of the valve plate is improved, and the service life is prolonged.

The invention belongs to the technical field of additive manufacturing and particularly discloses a system and method for controlling deformation in the manufacturing process of a metal part additive.The system for controlling deformation in the manufacturing process of the metal part additive comprises a rotating working table, a stress elimination device, a frequency detection device, a moldingdevice and a stress detection device. The stress elimination device comprises a vibration excitation table and a vibration exciter. The vibration excitation table is fixed to the vibration exciter, and a base plate is fixed to the vibration exciter. The vibration exciter is fixed to the rotating working table. The frequency detection device, the molding device and the stress detection device areinstalled above the base plate. When the system works, every time after to-be-molded parts are stacked by a plurality of layers by the molding device, and the inherent frequency of parts at the momentis acquired by the frequency detection device; the stress elimination device vibrates in the inherent frequency so that the inner stress of parts can be eliminated; then the inner stress of parts isdetected by the stress detection device; thus part deformation is controlled in the layer-by-layer stacking process of the parts; and the shape, size and precision of parts are improved.

The invention provides a machine for integrating constructing, cleaning and maintaining of a hanger rail type external wall. The machine comprises hanger rails, a traveling frame, a hanger rail turntable, a rotatable frame, a cargo boom and a cargo boom self-balancing mechanism, wherein the hanger rails are mounted on an overhead steel structure of a building roof or a roof overhang building; the traveling frame is movably arranged on the hanger rails; the hanger rail turntable is fixed on the traveling frame; a circular rail is arranged on the hanger rail turntable; the rotatable frame is connected to the circular rail on the hanger tail turntable; two fulcrums are arranged on the rotatable frame and the hanger rail turntable; the cargo boom is arranged on the rotatable frame; the two ends of the cargo boom extend out of the front fulcrum and the rear fulcrum respectively; a lifting hook and a lifting basket are arranged at the front end, close to the front fulcrum, of the cargo boom; a windlass is arranged on the rotatable frame and is connected with the lifting hook; a lifting device is arranged on the lifting basket; and the cargo boom self-balancing mechanism is formed in such a way that another two fulcrums are arranged on the cargo boom and the rotatable frame, and are corresponding to the two fulcrums up and down. The machine has the functions of cleaning and maintaining, is high in safety, and is reduced in influence on a roof.

The invention discloses a full-submersible separation type fan foundation and relates to the technical field of offshore wind power generation. Through the full-submersible separation type fan foundation, influence on a buoy by wave load is directly avoided, and the whole power response of a fan is obviously lowered. The full-submersible separation type fan foundation mainly comprises two parts including a submerging and surfacing type foundation and a fan system. The submerging and surfacing type foundation is composed of a sleeve, a supporting frame, submerging and surfacing drums, tensioning wires and catenaries; the fan system is composed of a fan and a tower drum; the tower drum penetrates through a middle sleeve, capable of realizing floating up and down; the sleeve is fixedly connected with a submerging and surfacing box through the supporting frame; the sleeve, the supporting frame and the submerging and surfacing drums are fixed beneath the ocean surface to form the submerging and surfacing type foundation, serving as a directed supporting seat of the tower drum, through the tensioning wires and the catenaries; and the bottom of the tower drum is connected with a seabed through the tensioning wires. The full-submersible separation type fan foundation is in a completely-new offshore fan foundation structure form and is suitable for building an offshore fan foundation.

The invention relates to a vertical shears-fork type yielding-free stereo garage which comprises shears-fork mechanisms on the two sides of a parking space. The rear end of the parking space is provided with a four-stand-column portal frame. A winding plant on the four-stand-column portal frame pulls and lifts a rotary disk bracket through a steel rope, and therefore an automobile tray can ascend and descend. A small rail car is arranged below the four-stand-column portal frame. A small rail car motor driving mechanism horizontally moves on a rail. The shears-fork mechanisms are provided with ground pulleys. The rotary disk bracket is arranged on the upper portion. The automobile tray is attached to the upper portion of the rotary disk bracket. The rotary disk bracket and the portal frame achieve locked protection through an electromagnetic pin. By means of the vertical shears-fork type yielding-free stereo garage, stereoscopic parking can be achieved in two layers of stereo garages in the mode that the bottom layer of stereo garage can be free of yielding, structure stress is relatively reasonable, a hoist rope chain system or a hydraulic system can be used as a driving source, various power sources can be provided, interference is not likely to be formed, and vertical shears-fork type yielding-free stereo garage is safe and reliable.

The invention relates to a cast-in-place reinforced concrete template, in particular to a creeping formwork platform. The platform comprises a template body, a creeping formwork, a guide rail and an anti-falling and anti-inclining supporting seat, wherein the template body is arranged at the upper part of the creeping formwork, the guide rail is vertically fixed on the creeping formwork, and the anti-falling and an-inclining supporting seat is arranged on a building and is matched with the guide rail; the creeping formwork platform is characterized in that an electric block is arranged below the anti-falling and anti-inclining supporting seat and is connected with the bottom of the creeping frame through a chain; the framework body of the creeping formwork platform adopting the technical scheme is light and has high reliability; moreover, the cost is relatively lower.

The invention relates to the field of train operation safety, and discloses a train imitation fish scale anti-overturning structure to ensure the safety of train operation. Including: base, mounting hole, support frame, rotating shaft, scales, micro motor, control box and wind speed detection device; the base is provided with a mounting hole for fixing with the car body; one end of the base is provided with a support frame; The lower end of the frame is provided with a rotating shaft; the rotating frame is fixedly connected with the supporting frame; scales are fixed on the supporting frame; a wind direction detection device is arranged on the windward side of the scales; the micro motor is used to drive the rotation of the rotating shaft; the micro motor and the wind speed detection device are also Connect with the control box respectively; the control box is used to obtain the wind speed and wind direction angle during the train travel through the wind speed detection device, evaluate the risk level according to the wind speed and wind direction angle, and calculate the scale that minimizes the overturning moment when evaluating the risk Opening angle, and command the micro motor to drive the scales through the rotating shaft to reach the opening angle of the scales that minimizes the overturning moment.

The invention relates to an axial plunger pump, and in particular relates to an axial plunger pump with double rows of cylinder holes and cylinder bodies. The plunger pump comprises a driving main shaft, a cylinder body, a fluid distributor, a plunger, a swinging tray and an upper cover, wherein the cylinder bodies are provided with a plurality of cylinder holes; the fluid distributor is provided with two semi-circle fluid distribution holes; the plunger pump is characterized in that the plurality of cylinder holes in the cylinder bodies are divided into two rows; the numbers of the two rows of cylinder holes are equal, and are alternatively distributed on two circumferences with the same radius centering on the axis of the driving main shaft; the bottom part of each cylinder hole is provided with waist-shaped through holes which are communicated with the fluid distribution holes on the fluid distributor; and the waist-shaped through holes are all distributed on the circumferences with the same radius centering on the axis of the driving main shaft. Through the application of the cylinder bodies of the two rows plunger holes, the fluid pulsation can be reduced effectively, the stability of the pump operation can be improved, so that the aim of vibration and noise reduction is achieved; by adopting the cylinder bodies of the two rows of plunger holes, under the condition of increasing discharging amount without changing the integral structure of the pump, the integral structure is more compact; and the increase of the flow rate also enables the working range of the pump to be increased greatly.

The invention provides a diamond wire saw cutting machine for an underwater vertical pipe. The diamond wire saw cutting machine is composed of a cutting device, a feeding device, a clamping device, atensioning device, a guide device and a main body frame. The main body frame is of vertical design and vertical installation, the cutting device, the feeding device and the clamping device are compactly installed on the main body frame, and the tensioning device and a rope control guide device are installed on the feeding device. The feeding device and the clamping device are in a parallel installation manner on the main body frame, and the clamping device is nested and installed in the middle of the feeding device, the rope control guide device controls the direction of a diamond string beadwire, to ensure that the string bead wire and the clamping device do not interact with each other during the cutting operation. The diamond wire saw cutting machine is used for cutting of the underwater composite vertical pipe or a jacket pile foundation of an abandoned platform, and operations such as the recovery or maintenance of the underwater composite vertical pipe and the dismantling of theabandoned platform can be implemented.

This invention relates a whirlpool compressor, which is to realize the none-oil lubricating of the compressor and reduce the tipping toque on the stirring whirlpool plate produced from the gas power and the centrifugal inertia force, and increases the working stability of the compressor, and prolongs the life the driving bearing. The defending self-rotating structure is composed of the stirring whirlpool plate (4), the small wrist joint (6), the bearing (7), and the bearing embedded clamp (8), wherein the top of the small wrist joint (6) is embedded at the end plate of the stirring whirlpool plate (4) through the bearing (7), and the under part of the small wrist joint (6) is mounted in the bearing embedded clamp (8), and he bearing embedded clamp (8) is mounted on the frame. The driving bearing (5) is embedded in the central part of the stirring whirlpool plate. Wherein the self-lubricating material (10) is arranged on the whirlpool plate surface that connects with the stirring whirlpool plate (4) and the bearing embedded clamp (8), and the self-lubricating material (9) is arranged on the connecting surface of the static whirlpool plate (3) and the stirring whirlpool plate (4).

The invention relates to a horizontally slidable device and an application method in jack lifting and unloading construction, belongs to the technical field of building construction, and is used for solving the problem that in construction, a jack overturns due to horizontal displacement of a lifted object. The horizontally slidable device comprises a top plate, a bottom plate, balls between the top plate and the bottom plate, a steel sleeve arranged on the lower surface of the bottom plate and a limiting device positioned at the end part of the bottom plate, wherein a gap is formed between the top plate and the bottom plate; the top plate can slide horizontally relative to the bottom plate through the balls. The application method comprises the following steps: firstly, adjusting limiting rods of the bottom plate to position the top plate in a central position and lock the horizontal freedom degree of the top plate; secondly, sleeving the top end of the jack with the steel sleeve to connect the horizontally slidable device and the jack; thirdly, putting the jack at a preset position, and adjusting the elongation of the jack to tightly press the upper surface of the top plate against the lifted object; and finally, at the beginning of the construction, unlocking the limiting rods to ensure that the top plate can slide horizontally during the construction process.

The invention discloses a retractable inflation-type wind energy umbrella sail device with double brackets, which comprises an extension-type retractable stressed bracket, an inflated umbrella sail, an inflation and pumping device, an umbrella sail pull rope, a reversal pull rope releasing and withdrawing device, a bracket controller and a support platform. The extension-type retractable stressed bracket has the functions of extension, adjustment on an elevation angle, suspension of the umbrella sail and bearing pulling force, the support platform has the function of adjusting a rotating angle along the wind direction, and the stressed bracket also has the function of suspending multi-level structures of a plurality of umbrella sails. The retractable inflation-type wind energy umbrella sail device realizes the releasing and the withdrawing of the umbrella sail by inflating and pumping the umbrella sail as well as the extension of the reversal pull rope releasing and withdrawing device and the stressed bracket. The disclosed device has the characteristics of stable position of the umbrella sail, unchanged shape of the umbrella sail, large wind area, high wind position, high utilization rate of wind energy, simple and convenient releasing and withdrawing operations and the like, is quite high in reliability, and can be used not only as a wind power device for ship sailing, but also as a wind power supplementing device for the sailing of traditional oil burning vessels.

An equational gear rack elevator involving of a construction lift provides an equational gear rack construction elevator. It has frame, rack, base frame, top beams, two top wheels, suspension cage, driven mainframe, driven gears, suspension cage pulley, counterpoise and balancing steel wires. The frame comprising of bulk components from bottom to top is installed on the base frame, the top beams are on the top of frame, the top wheels are on the top beams and the counterpoise is in the frame. And motor and pulleys are installed on the suspension cage; gears are installed on the mainframe and mesh with the rack; one end of steel wires is linked with the counterpoise and the other is linked with the suspension cage through the top wheels. The frame can be installed the required height one-time in the condition of not having add-walls and can be installed and operation at the start of construction. It reduces the overturning weight moment greatly, reduces the power consumption and avoids the danger of suspension cage cross beyond the top of guide rail, the equipment is more reasonable and safe. The construction lift is easy to installing, and the occupied storage space is small, decreases the cost of manufacture and install greatly.

The invention relates to the technical field of a hydraulic element, and particularly relates to a flow distribution plate for a plunger pump. The dynamic-static pressure lubricating type flow distribution plate is of a disc shape entirely, and comprises a waist-shaped high pressure oil discharge outlet at one side, a waist-shaped low pressure oil suction inlet, separated from the high pressure oil discharge outlet, at the other side, and installation locating holes at near peripheral sides; the flow distribution plate for the plunger pump is formed by splicing oil discharge blocks and oil suction blocks; the splicing positions are respectively located at the edges of a beginning end and a tail end of the waist-shaped low pressure oil suction inlet; upper joints of the oil discharge blocks are lap-jointed onto the lower joints of the oil suction blocks; the width of an outer sealing belt is 1.1-1.3 times the inner sealing width; a plurality of Eta-shaped three-dimensional tapered grooves, of which the openings are at the oil discharge outlet, are further formed in outer sealing end faces of the oil discharge blocks. The dynamic-static pressure lubricating type flow distribution plate disclosed by the invention has the characteristics of reasonable layout, and convenience in special treatment processing for particular parts of the flow distribution plate; based on the demand on production of fluid dynamic pressure lubrication, adoption of the flow distribution plate can effectively reduce leakage, decrease flow distribution vibration and noise, and reduce generation of a capsizing moment of a cylinder body.

The invention belongs to the technical field of truck transportation, in particular to a van anti-overturning device and a control method thereof. The van anti-overturning device comprises a spoiler telescopic mechanism, the distance sensors, the pressure sensors and a controller, and the spoiler telescopic mechanism comprises a box body and the spoilers; the box body is fixedly connected with thetruck carriage body, a driving mechanism is arranged in the box body, and the spoilers are located at the two sides of the upper portion of the truck carriage body; the spoilers at the two sides aresymmetrically arranged, the section shapes of the spoilers are opposite to the section shapes of the wings up and down, and the driving mechanism drives the spoilers at the two sides to move away fromor close to each other in a horizontal direction; the distance sensors are arranged at the two sides of the truck carriage body, the pressure sensors are arranged at the two sides of the truck carriage body, and the controller is in signal connection with the driving mechanism, the distance sensors, the pressure sensors and a speed measuring mechanism of the truck.

The invention provides an octahedral guiding elevator. The octahedral guiding elevator comprises a cuboid supporting frame, an elevator car, and a traction mechanism, wherein the cuboid supporting frame is supported by four upright posts; the elevator car is arranged in the supporting frame; the traction mechanism is used for drawing the elevator car to move; the elevator car comprises four side edge angles; mounting seats opposite to the two adjacent side surfaces of the upright posts are arranged at the extending parts on the two adjacent side surfaces of elevator car forming the side edge angles; guide grooves are formed in the mounting seats; guide parts are arranged in the guide grooves; the elevator car is matched with the upright post side surfaces through the guide parts to conduct lifting motion; two guide surfaces matched with the guide part are formed on each upright post; eight guide surfaces are formed on the four upright posts in total. The guide parts and the mounting seats are matched with each other, and the elevator car is guided in all directions to enable the elevator car to move up and down along the upright posts under external driving; an octahedral guiding elevator adopting the structure is an independent elevator product, and is stable and reliable in running, aesthetic in appearance, convenient to mount, and wide in application.

The invention discloses a scroll compressor, relating to the technical field of fluid machinery. The scroll compressor comprises a driving shaft, a joint component installed on the driving shaft, and a needle roller bearing, wherein a crank of the driving shaft is connected with the needle roller bearing through a shaft sleeve of the joint component. The invention is characterized in that the wall of the shaft sleeve hole of the joint component at least has one bearing driving plane; and in the shaft sleeve hole, one section of the crank adjacent to the outer end is provided with a crank driving plane bonded with the shaft sleeve driving plane, and the other section of the crank is provided with a plane which has a 0.3-0.5mm clearance with the shaft sleeve driving plane. Compared with the prior art, the invention can solve the problems of low working reliability, difficulty in assembly, and insufficient operation stability in the existing scroll compressor.