16results about How to "Reduce impact stress" patented technology

The present invention relates to an integral high-pressure and ultra-large flow hydraulic distributing valve, comprising a valve body, wherein a stepped groove is provided in the valve body, which is located at the same hole center and has a decreasing aperture from top to bottom, the bottom of the stepped groove is connected to the liquid inlet through hole, and the suction valve seat, suction valve core, extrusion valve seat, extrusion valve core and extrusion valve stopper that contact and cooperate with each other are arranged in sequence upward along the bottom of the stepped groove, and the extrusion valve stopper is connected to the liquid discharge through hole. The present invention has a compact and reasonable structure and is easy to operate. By adopting a flat valve structure, the lower part of the suction valve core has a parabolic structure, which is conducive to reducing valve port cavitation. The suction valve and the extrusion valve are both designed with a low-friction anti-rotation structure, which solves the problem of the valve core rotating when impacted by high-speed uneven fluid; the extrusion valve seat is provided with an oblique counter-impact structure, and the impact energy of the fluid is dissipated through the oblique counter-impact structure, thereby reducing the impact of the fluid on the valve core and enhancing the operating stability of the distributing valve.

The present application relates to shearing device technical field, specifically disclose a gantry hydraulic shearing device, including length before and after extending the material conveying groove, the gantry frame is arranged in the material conveying groove discharge end, the hydraulic drive is installed on the gantry frame, the shearing cutter is assembled on the gantry frame and is connected the hydraulic drive output shaft and moves up and down, the clamp plate assembly is assembled on the gantry frame and moves up and down, the pressure material elastic component is connected between the hydraulic drive output shaft and the clamp plate assembly;The lower end of the clamp plate assembly has the pressure material surface for contacting the metal material, the pressure material elastic component is used to apply elastic force to the clamp plate assembly, so that the clamp plate assembly moves down to the pressure material surface below the shearing surface of the shearing cutter;The hydraulic drive is used to drive the shearing cutter and the clamp plate assembly synchronous descent, so that the pressure material surface of the clamp plate assembly contacts the metal material prior to the shearing surface of the shearing cutter.The gantry hydraulic shearing device can prolong the service life of the shearing cutter, improve the shearing quality.

The present application provides a self-protection control method, electronic device and vehicle for an electric drive system, belonging to the field of vehicle technology. When the protection control condition is met, the counter is assigned a preset first count value, and the function protection flag is assigned a default startup parameter value, and the default maximum available torque of the motor is reduced to the preset safe maximum available torque according to the preset first adjustment duration. Meeting the protection control condition means that the vehicle is driving on a bad road at a high speed and high torque. The self-protection function is turned on by assigning the counter to the preset first count value and assigning the function protection flag to the default startup parameter value, reducing the impact stress by lowering the upper limit of the requested torque, reducing the risk of shaft tooth damage, and ensuring the safety of the electric drive system. At the same time, the torque is adjusted through the first adjustment duration to ensure the smoothness of the torque adjustment, giving the user a better driving experience.

The invention discloses a steering wheel framework die-casting die with an air bag installed on a hook, and particularly relates to the technical field of die-casting dies. A fixed die core is embedded in a fixed die frame, guide columns are arranged on the edge of the fixed die frame, and first exhaust plates are arranged on the two sides of the fixed die core; a die casting opening is formed in one side of the middle of the fixed die core, a movable die is arranged on one side of the fixed die frame, a movable die core is embedded in the middle of the movable die, hook inserts are embedded in the bottoms of the two sides of the middle of the movable die core, hanging tables are arranged at the bottoms of the hook inserts, and the bottom ends of the hanging tables abut against the inner wall of the movable die; the hook insert is adopted as a mold at the position of a steering wheel hook, the hanging table and the movable mold core are mutually fixed, and the hook insert can be conveniently taken out and replaced after being seriously abraded; meanwhile, when the height of the steering wheel hook needs to be adjusted, the end corner of the top of the hook insert can be polished through the polishing mechanism, and then the height of the steering wheel hook can be controlled.

The utility model discloses a composite board which comprises a core board layer and two outer board layers, the two outer board layers are arranged on the two sides of the core board layer respectively, rubber layers are arranged between the core board layer and the two outer board layers, a plurality of sets of buffering structures are arranged in the core board layer, and the buffering structures are arranged between the core board layer and the two outer board layers. The multiple sets of buffer structures are arranged in the core plate layer at equal intervals in the length direction of the core plate layer. According to the composite board, after the outer board layer is impacted, impact stress borne by the outer board layer and the core board layer can be reduced under the action of the rubber layer, fragmentation and abrasion caused by external force in the transportation, laying and later use processes of the composite board are reduced, meanwhile, by arranging the rubber layer, the weight of the board with the same size can be reduced, and the service life of the composite board is prolonged. Transportation and laying consumption is reduced, and cost is reduced. The device has the advantages of being simple in structure, easy to implement and low in use cost, and benefits can be improved.

The application relates to the technical field of road engineering, in particular to a setting method of a highway super-high gentle section drainage system based on a longest water collection path, which comprises the following steps: field investigation; simplifying the maximum water collection path into a plane quadratic curve, taking a point where the maximum water collection path enters a water accumulation area as an original point O, taking the road center line direction of the O point as an X axis, and taking the vertical road center line direction as a Y axis to establish a plane coordinate system; determining the position of a starting point A point of the maximum water collection path; deriving a quadratic curve of the maximum water collection path according to the A point, the O point coordinates and the derivative of the maximum water collection path curve at the O point; and determining the setting angle of the water interception groove at different positions according to the longest water collection path to determine the number of water interception grooves. According to the application, the water interception groove position is determined according to the longest water collection path, the water interception groove angle is 90 DEG intersected with the maximum water collection path, water flow is collected to the maximum extent, water flow collection in the gentle section is blocked, and water accumulation is reduced.

The utility model relates to the technical field of clamps, in particular to a pneumatic and mechanical linkage multifunctional rapid clamping device which comprises a base, a driving mechanism is arranged on the upper surface of the base, the output end of the driving mechanism is connected with a clamping block making contact with a workpiece, and the clamping block is connected with the base in a sliding mode. The clamping block comprises a shell, and a plurality of independent contact units are arranged in the shell; each contact unit comprises a clamping head in sliding fit with the cavity of the shell, a guide rod fixed in the cavity, a first spring sleeving the guide rod, and a second spring connecting the clamping head and the inner wall of the cavity; the clamping head sleeves the guide rod in a sliding manner; when the clamping head makes contact with a workpiece, all the contact units are independently compressed and deformed to adapt to the contour of the workpiece, and the rigid contact mode of a traditional clamping device is thoroughly changed through the independent cavities and the sliding contact sets arranged on the end faces of the clamping blocks.

The invention relates to the technical field of direct-current power supply control, in particular to a direct-current capacitance calculation method of a diesel generating set under a pulse load and a diesel generating set system. Comprise pulse peak power, pulse period, pulse on / off time, system no-load direct current voltage, allowable minimum direct current voltage and response time of a diesel engine control unit ECU; according to the obtained parameters, equivalent discharge time needing to be provided by the energy storage capacitor is determined; and calculating the capacitance value of the energy storage capacitor according to an energy conservation relation, and connecting the calculated energy storage capacitor in parallel to a direct current bus of the generator set. In the invention, by establishing a quantitative calculation method of the direct current energy storage capacitor under the pulse load and combining a slow response control strategy of low-pass filtering of a voltage loop of the alternating current-direct current converter, the pulse transient power is borne by the capacitor, and the diesel engine stably intervenes according to self response characteristics, so that the voltage fluctuation of a direct current bus is effectively inhibited; and engine rotating speed impact and mechanical stress are reduced.

The present application relates to a kind of fish oil extraction equipment and its extraction process, belong to fish oil extraction technical field, by adopting the synergies of helical guide rail and elastic limiting part, multiple stirring parts are sequentially separated from limiting under the control of driving part and swing in vertical direction, form continuous wave type stirring track, reciprocating activity part and helical guide rail being set in the center of stirring barrel, cooperate with the synergies of elastic limiting part and stirring part, realize the effective stirring of high viscosity fish oil, both realize the uniform mixing and cyclic flow of material, shear force is dispersed into multi-section progressive action, avoid the mechanical damage of traditional high-strength concentrated shearing to protein-phospholipid complex colloid structure, while the buffer characteristics of elastic limiting part further reduce impact stress, solve the problem that the high viscosity of fish oil and its sensitive colloid structure in prior art make traditional high shear stirring easily lead to active ingredient loss and system stability reduction.

The utility model belongs to the technical field of battery processing, and particularly relates to a guide structure for battery cell processing, which comprises a support main body, a first limiting piece, at least one first guide body and at least one second guide body, one end of the second guide body is connected to at least one side surface of the supporting main body; one end of the first limiting piece is connected to the supporting main body; the other end of the first limiting piece is connected to the second guide body; one end of the first guide body is connected to at least one side surface of the supporting main body; the other end of the first guiding body abuts against the second guiding body. According to the utility model, the double-guide effect can be realized, the impact stress of the battery cell body can be reduced, the guide range can be expanded, the guide failure caused by overlarge deflection of the battery cell body is avoided, and the conveying efficiency is guaranteed.

The utility model relates to a wave impact resistant water conservancy project ecological protection slope which comprises a positioning mounting plate, positioning supporting legs are fixedly connected to the four corners of the bottom of the positioning mounting plate, an adjusting box is fixedly connected to the top of the positioning mounting plate, an adjustable impact resistant plate is arranged in the adjusting box, and a buffer box is fixedly connected to the front side of the adjusting box. The wave impact force can be buffered by arranging the buffering plate, the impact stress can be further buffered by arranging the buffering box, the situation that the wave impact force directly acts on the adjusting box, and consequently the adjusting box is deformed or even damaged is avoided, and the service life of the adjusting box is prolonged. And by arranging a second adjusting bolt, a two-way screw can be driven to rotate, so that a threaded sleeve can drive a second connecting rod to adjust the angle, the adjustable anti-impact plate can ascend and descend, and the wave impact resistance area can be increased conveniently.

The invention discloses a transmission system and a motor starting control method. The transmission system comprises a motor; one end of the speed regulator is connected with the motor, and the other end is disconnected with the load before the motor is started and connected with the load after the motor is started; the control system is used for controlling the operation states of the motor and the speed regulator; before the motor is started, the control system controls the motor to be powered off and controls the speed regulator to be powered on, so that the speed regulator drives the motor to rotate, and when the motor reaches the rated rotating speed, the control system controls the speed regulator to be powered off and simultaneously controls the motor to be powered on. According to the invention, the starting impact can be reduced, the influence on the motor and the power grid is reduced, the current demand during starting is reduced, the capacity of a power grid system is reduced, smooth starting can be realized, the motor is driven to rotate through the speed regulator, the motor generates no-load counter electromotive force, and the motor can be started more stably when electrified; the reliability and the stability of motor starting are improved, and the mechanical stress during motor starting is reduced.

The utility model relates to a self-adjusting hydraulic power unit, which belongs to the technical field of hydraulic power, and comprises an oil tank, a hydraulic power unit body, a mounting support plate, a wall surface and a limiting block, one side of the hydraulic power unit body is fixedly mounted on one side of the oil tank, one side of the mounting support plate is fixedly mounted on one side of the oil tank, and the limiting block is fixedly mounted on one side of the oil tank. The limiting blocks are fixedly installed on one side of the wall face and distributed in a mirror symmetry mode, a quick disassembling mechanism is connected to the installation supporting plate, and the installation supporting plate is connected with the wall face through the quick disassembling mechanism. According to the self-adjusting hydraulic power unit, the function that the hydraulic power unit body can be conveniently disassembled and assembled can be provided, through the design of convenient disassembly and assembly, the time needed for disassembly and assembly can be remarkably shortened, the convenient disassembly and assembly function is not limited to rapid disassembly, and more importantly, the original structural stability can be kept or recovered after disassembly.

The application provides a new type of aggregate facing concrete and a construction process thereof, and belongs to the technical field of building engineering. The construction process comprises the following steps: preparing a pouring mold, pouring concrete according to a designed mixing ratio and leveling before initial setting; spraying a retarding agent prop by using a spray gun and naturally solidifying; and washing the retarding area by using a high-pressure water gun containing an ultrasonic generator until the aggregate is exposed. The method utilizes the synergistic effect of chemical softening and physical cavitation to achieve efficient stripping under low water pressure, solves the problems of uneven exposed aggregate depth, easy loosening and falling of the aggregate and blurred pattern boundary of the traditional exposed aggregate concrete, and realizes high-precision construction with the aggregate damage rate close to zero and the exposed aggregate depth deviation controlled within + / -0.5mm. The application has high construction efficiency, and the finished product has clear exposed aggregate, natural color and three-dimensional texture, and is suitable for high-quality decorative engineering such as municipal landscape ground paving.

The invention provides a self-protection control method of an electric drive system, electronic equipment and a vehicle, and belongs to the technical field of vehicles, when protection control conditions are met, a counter is assigned to be a preset first count value, and a function protection flag bit is assigned to be a default starting parameter value; and the default maximum available torque of the motor is reduced to the preset safe maximum available torque according to the preset first adjustment duration. If the protection control condition is met, the vehicle runs on the bad road in a high-speed and large-torque state, the self-protection function is started by assigning a counter as a preset first count value and assigning a function protection flag bit as a default starting parameter value, the impact stress is reduced by reducing the upper limit of the request torque, the risk of damage to shaft teeth is reduced, and the service life of the vehicle is prolonged. The safety of the electric driving system is guaranteed, meanwhile, torque adjustment is conducted through the first adjustment duration, the smoothness of torque adjustment is guaranteed, and better driving experience is brought to a user.

The invention relates to the technical field of electric sofas, in particular to an electric leather sofa based on ergonomics, which comprises a waist support mechanism and a soft support mechanism. The radian and the height of the waist supporting mechanism are correspondingly adjusted through the second electric telescopic rod and the first electric telescopic rod, and the waist supporting mechanism can be adjusted to be in various supporting shapes matched with the long lumbar vertebra, the short lumbar vertebra, the large body shape, the small body shape, the lumbar vertebra diseases and the like according to the physiological characteristics of the lumbar vertebra of different users. The soft supporting mechanism provides corresponding support for the thoracic vertebra and the sacral vertebrae of the human body, it is ensured that the back of the human body is optimally supported, and the sacral vertebrae supporting air bag and the response area can lift the back waist and the thigh roots of the human body to a certain degree through pressure changes of the sitting pressure area and the response area of the hip supporting air bag for people with special body shapes. Therefore, the sofa can be effectively prevented from sinking, the correct sitting posture is kept, and the pressure on the lumbar vertebra and the spine is reduced.