69 results about "Single impact" patented technology

The invention relates to an impact loading mechanism comprising two sets of bracket arms, two bracket arm splints, an installation barrel, a seal cover, two sets of thrust force bearings, two sets of movable loading cones, a threaded sleeve, a spline shaft, two flange splines, two loading arms, two rod end joint ball bearings, two support columns, two impact loading rods and a joint ball bearing.The impact loading mechanism can convert the torque of the load input end of the spline shaft into the thrust force of the movable loading cones and apply the thrust force of the movable loading cones to the impact loading rods, and the impact loading mechanism can directly apply the thrust force or pull force of the load input end of the spline shaft to the impact loading rods through the first loading arm. Because mobile blocks on the movable loading cones can be movable or static, the distance between two loading points on a single impact loading rod can change along with time or keep unchanged. Thus, the dynamic synchronous multi-point movement simulation impact loading of the impact loading rods can be realized, and random dynamic or static shearing force and torque can be obtained at the roots of the impact loading rods.

The invention discloses a comprehensive rock impacting breaking test stand which comprises a rotating speed sensor, a propelling part, a rock drill, a displacement sensor, a travel switch, a rear support, a lifting table, a thrust rack, a rotating rack and a pendulum bob part. Optional height adjustment in the operating range, horizontal movement of rock and change of the included angle between a tool and the rock can be realized, holes in large rock at different regular positions are formed, the empty hole effect of the rock is researched, the research of rock breaking by combining impacting and rock breaking methods in other forms is realized by virtue of rapid replacement equipment, and the research of rock impacting breaking under single impact and continuous impact conditions is realized. The comprehensive rock impacting breaking test stand disclosed by the invention can serve as both research equipment in a lab and performance detection equipment in factories of rock drills, hydraulic hammers, down-the-hole drills and the like.

The invention discloses a stochastic resonance weak impact feature enhancement extraction method on the basis of a sliding window. The method comprises the following steps: firstly, according to the rotation frequency of a tested object, constructing the sliding window in a time domain, and utilizing the sliding window to carry out time domain interception on a signal; secondly, successively taking each intercepted sub-signal as the input of a variable-scale random resonance system, selecting an optimal system parameter according to the maximization of a resonance response measurement index, and substituting the optimal system parameter into the resonance system to obtain an optimal detection result of the corresponding sub-signal; and finally, carrying out normalization processing on the optimal detection results of all sub-signals according to a uniform standard to eliminate amplitude differences, and successively carrying out end-to-end connection to obtain a final detection result. The method utilizes the sliding window to partition the signal which contains a plurality of impact components into a plurality of sub-signals which contain a single impact component, solves the problem that weak impact features are difficult in effectively extracting, realizes the enhancement extraction of the weak impact features of different amplitudes, and exhibits an important meaning on the early weak fault diagnosis of mechanical equipment.

The invention discloses a designing and manufacturing method for a drop hammer type test clamp allowing non-single impact positions, relates to the fields of impact performance testing and evaluation for metal, nonmetal and composite materials, and particularly relates to designing and manufacturing of a plate-shaped test piece clamp allowing adjustable impact positions of a drop hammer type impact testing machine. Impact positions are fixed to the geometric centers of test pieces so that present drop hammer type impact testers cannot achieve impact performance testing or evaluation in a zone or a range of a material under practical service conditions. Aiming the problem, off-axis rolling screw transmission devices are adopted to drive horizontal and vertical moving modules to achieve bidirectional displacement, and are cooperated with positioning devices consisting of spring locking pins and limiting slide slots, and therefore accurate adjustment of a plurality of the impact positions on the test piece is achieved in a clamp mounting space limited by a drop hammer type tester, a drop hammer type impact test of non-fixed impact positions on the test piece is completed, and material impact performance under practical service conditions are tested and represented.

The invention discloses a converter steam dome high/low water level automatic feedwater unit, wherein two single impact water level adjustable valve are arranged on the backwater pipe of the revolving furnace evaporation cooling supply pipe interlocking with rise and fall of the oxygen guns.

A closed-type direct-reversed circulation impactor is a boring and drilling tool for rapid rock drilling and is applied to various geotechnical engineering construction. The closed-type direct-reversed circulation impactor comprises a concentric three-channel short circuit, an upper joint, an upper outer pipe, a reducing ventilation sleeve, a spacer bush, a central air distribution seat, a cylinder sleeve, a lower outer pipe, a core tube, a piston, a jump ring, a retaining sleeve, a semicircle clamp, a spine housing and a drill bit. The scheme of connection of a three-channel concentric drilling rig and central air distribution is adopted, maximum effective working area of the working piston of the impactor is achieved, single impacting energy of the closed-type direct-reversed circulationimpactor is remarkably improved, and drilling efficiency of the impactor is further improved; the problem about infiltration of flushing liquid in contact seal is further solved by designing bidirectional synergetic check valves on the basis of the above structure, the air-intake check valve and the air-return check valve are operated synergetically to commonly complete opening and closing operations, operation reliability of the impactor is improved, operation life of the impactor is prolonged, and long-term, stable and efficient operation of the impactor is benefited.

The invention relates to the field of mine machinery and discloses a bolt-fixture-free impact plate of an impact crusher, solving the problems that the impact plate is quick to abrade, short in service life, easy to break and easy to deform due to impact and crushed materials take a flaky shape easily. The impact plate is installed at one end of a crushing cavity; an impact plate fixing device is installed on a non-working surface; the impact plate fixing device is outwardly convex, so that the middle part of the impact plate is thickened, impact-resistant and difficult to deform; and according to different materials, the angle and the shape of a working surface of the impact plate are correspondingly changed into different concavo-convex shapes. The bolt-fixture-free impact plate of the impact crusher has the advantages that: the bolt-fixture-free impact plate of the impact crusher is impact-resistant, free of deformation and durable; the utility ratio of a single impact plate is four times higher than that of the impact plate in the current market; the impact plate can be abraded till 10-15mm from the bottom; the bolt-fixture-free impact plate of the impact crusher is energy-saving, convenient to maintain and long in service life; the working surface of the impact plate adopts a special concavo-convex shape, so that the formation possibility of flaky materials is reduced and the quality and the yield of cuboid products are increased.

The invention provides a method and device for analyzing fault segment location based on spectral sequence kurtosis. The method and device are mainly used for the auxiliary judgment of a fault segmentwhen a single-phase grounding fault occurs on a power distribution system. The transient gravity center frequency of the upstream zero-sequence current of a fault point is obvious, and is approximateto the shape of a single impact by means of spectrum analysis, and the downstream zero-sequence current of the fault point has a certain amplitude at a plurality of resonant frequencies, and is approximate to the shape of multi impacts, and therefore, spectrograms at two sides of the fault point are significantly different; with the maximum value of the zero-sequence current Fourier spectrum analysis sequence of monitoring points adopted as input signals for kurtosis calculation, a fault segment can be determined by means of the maximum value of the kurtosis difference value of various segments when the transient gravity center frequency is not obvious, and the maximum value can be used as an effective auxiliary judgment basis.

Method and apparatus of back riveting construction for sections of aircraft structure utilizing the flush riveting wherein the back bar tooling for all the rivets in the entire section is a single piece of stationary tooling which conforms to the exterior shape of the aircraft section. The rivet gun is a single impact pneumatic gun with a rivet driving hammer which is offset from the axis of the gun's piston and impact pin to upset rivet under C-channel flanges.

The invention discloses a secondary impact hydraulic breaking hammer. The secondary impact hydraulic breaking hammer comprises a middle shell, a front shell, a hydraulic main drill rod and a middle drill rod of the hydraulic breaking hammer; the front shell is fixed on the bottom surface of the middle shell; a central through hole is formed in the middle part of a bottom plate of the front shell;the main drill rod is inserted in the central through hole; an internal thread is molded on the internal side wall of the front shell; an internal reinforced sleeve body is screwed in the internal thread; the main drill rod is inserted in the internal reinforced sleeve body; and a lower raised sleeve body of the internal reinforced sleeve body is inserted into a middle through hole. According to the secondary impact hydraulic breaking hammer, continuous impact of the middle drill rod and the main drill rod can be realized during single impact of a piston rod of a hydraulic cylinder so as to realize secondary impact so that the breaking efficiency is greatly enhanced and the breaking effect is greatly improved; and moreover, due to the internal reinforced sleeve body arranged in the front shell, the main drill rod is not in direct contact with the front shell so that the wear is reduced and the service life is prolonged.

A method and apparatus for controlling deployment of the pedestrian head protection devices on a motor vehicle having a metal bumper is disclosed. The disclosed inventive concept involves strategic placement of accelerometer sensing devices and the derivation of a real time impact signal from the signals generated by the accelerometers. This real time impact signal is used along with thresholds and time window to control deployment. The apparatus includes a metal bumper, two support brackets attaching the bumper to the vehicle and at least two accelerometers fitted to the bumper proximate the brackets. The derivation and use of a single impact signal from said first and second signal-generating accelerometers is achieved by taking the larger of two absolute values derived from the accelerometers.

The invention discloses a liquid-jet hammer with a fluid supplementation and energy storage function. An impact hammer piston is located inside an internal cylinder, can slide forwards and backwards and divides the internal cylinder into a front chamber and a back chamber. A jet element is utilized to realize bistable jet, the direction of fluid is switched to make fluid enter the front chamber and the back chamber of the internal cylinder alternately, and the impact hammer piston is driven to act in a reciprocating manner. In the return process, fluid enters the front chamber of the liquid-jet hammer via a radial hole in the impact hammer piston, and under the action of pressure difference, the piston is pushed to return, and an energy storage spring is compressed to accumulate energy. In the stroke process, water hammer pressure and stored spring force are utilized, impact speed can be increased effectively, and part of fluid enters the back chamber via a fluid supplementation hole in the internal cylinder so as to achieve the purpose of fluid supplementation and energy storage and speed increase. The liquid-jet hammer is simple in structure, less prone to wear and long in service life, the energy storage spring and the fluid supplementation hole are utilized to realize the energy storage function, single impacting energy of the liquid-jet hammer can be enhanced, and accordingly hard rock boring is increased.

A complete helmet assembly comprising an inner helmet assembly similar to a baseball, softball, or cricket helmet and an exterior shell assembly are disclosed. The inner helmet assembly is similar to a standard helmet. The exterior shell assembly comprises two or more layers, one of said layers (preferably the more exterior layer) being hard and elastic and one or more of said layers (preferably a more internal layer) being a plastically deformable layer comprising a crumple zone that would need to be replaced after the exterior shell assembly receives significant damage. The user gets the advantages of both a reusable interior helmet and the advantages of single impact safety materials commonly used in bicycle and motorcycle helmets.

The invention provides a single-impact surface nano-crystallization and gradient structure machining device. The device comprises a tool head, a guiding sleeve, a transmission rod, a corrugated wear-resistant sleeve, wear-resistant balls, a pneumatic motor and a casing and can be manufactured in such a form that the device can be conveniently clamped on machining equipment such as a lathe, a milling machine, a planing machine, a grinding machine, a machining center and the like, the surface of a workpiece is subjected to plastic deformation, and surface grains are refined to the nanometer scale. With the device, the production efficiency can be remarkably improved, the equipment input can be reduced, the production cost can be reduced, and the surface performance and the overall performance of the workpiece can be improved.

The invention discloses an optimization method and device of a single-impact stress screening condition. The method comprises the following steps: according to the failure threshold value of a product, establishing a reliability model of the product to obtain the operating life distribution function of a no-damage product and the operating life distribution function of a product which fails only due to impact stress in a use process; on the basis of the failure threshold value of the product, establishing a single-impact stress screening process model for a determined value to obtain the normalized life distribution function of a non-failure product after single-impact stress screening, wherein the product which does not have initial damage but has damages after screening and the product which has the initial damage but passes the screening have different life distribution functions; according to the expected life of the product, optimizing the normalized life distribution function of the product to obtain the optimized single-impact stress screening condition. The method can adapt to a situation that the product without initial damages and the product which is initially compact but has defects after screening have different life functions, and enriches an application scene of the single-impact stress screening condition.

The invention discloses a low-cost modular drop hammer type impact fixture with a non-single impact position point, which is used for solving the technical problem that an existing fixture is poor inpracticability. According to the technical scheme, the fixture comprises a standard clamp, a supporting plate, a cover plate and rubber pads. The supporting plate is inlaid into a groove of the standard clamp and is capable of moving forth and back in the length direction of the groove; a test piece is arranged in the groove of the supporting plate to perform impact on different positions of the test piece; and the cover plate is arranged at the upper surface of the test piece to ensure the contact of the rubber pads at the two sides of the bottom portion of the cover plate and the test pieceand ensure the alignment of the four sides of the cover plate and the four sides of the groove of the standard clamp. The supporting plate with a customizable size solves the problem of supporting test pieces with different sizes; the rubber pads on the two sides of the cover plate solve the problem of keeping the same boundary condition of the test piece when different positions of the test pieceare impacted; the supporting plate and the cover plate which are easy to machine solve the problem that the overall cost of the clamp is too high, and practicability is good.

The invention provides a slope instability dynamic evolution device capable of simulating various slip factors indoors, and the device comprises a model framework unit, an overlying load loading unit, an impact unit and an underground water and rainfall simulation unit, and can apply single impact vibration to a sample to simulate blasting vibration. The slope instability dynamic evolution device capable of simulating various slip factors indoors can be used for carrying out a large-scale slope engineering indoor similarity simulation test, so that the dynamic evolution process of slope instability is tracked, analyzed and researched, the dynamic spatio-temporal evolution law and expression form of slope landslide damage from formation, stabilization, inoculation, development and damage are obtained, and according to the understanding of the law and characteristics of slope instability damage, the method which can be used for early warning of temporary sliding before slope instability is studied, so that technical support is provided for timely and accurate early warning before slope instability damage.

The invention discloses an air distribution system of a rapid and energy-saving down-the-hole hammer for a water well. The air distribution system comprises an outer pipe, an internal cylinder, a guide sleeve, an air distributor and a piston, wherein the outer surface of the internal cylinder and the inner surface of the outer pipe are matched to form a total air inlet passage of the air distribution system; the piston, the outer pipe and the guide sleeve are matched to form a front air chamber; the outer surface of the piston and the inner surface of the outer pipe are matched to form a front air chamber air inlet passage leading to the front air chamber; the piston, the internal cylinder and the air distributor are matched to form a rear air chamber. With adoption of the technical scheme, the air distribution system has the following technical effects: the problem of lapping damage and breakage of a matched surface of the piston and the internal cylinder of the down-the-hole hammer can be solved completely, the structure is reasonable, the pneumatic down-the-hole hammer is high in working pressure and low in air consumption, and 30% of energy is saved; single impact force is large, and the rock breaking capability is high; the working frequency and the working efficiency are high, the energy consumption is low, and the drilling speed is increased by 20%-35%.

The invention relates to a burdock goat milk tablet and a preparation method of the burdock goat milk tablet. The method comprises the steps that burdock is placed into water to be soaked for 3 hours, then, the solution is boiled to the boiling state by strong fire, is then boiled by slow fire and is filtered to obtain filter liquid, and a high-pressure steam method is adopted for cooling the filter liquid after the sterilization for use; goat milk is subjected to purification and standardization, then, the pressure reduction concentration is carried out to obtain raw material goat milk, sterilized filter liquid is added into the concentrated raw material goat milk, spray drying is carried out, the materials are cooled to the room temperature, and then, burdock goat milk powder is obtained; and the burdock goat milk powder, cane sugar, glucose and magnesium stearate are uniformly mixed and are made into the burdock goat milk tablets by a single impact tablet press. The burdock is added in the goat milk powder, the burdock contains rich dietary fiber, vivotoxin can be discharged, and the food energy release can also be decelerated, so the gathering of fat in the body can be reduced, the fatty acid decomposition speed is accelerated, the effects of reducing the cholesterol, promoting the heart health, helping the defecation and the excretion and fast eliminating and preventing harmful metabolin accumulated in the body can be realized, and a great effect is realized on the toxin elimination, defecation, fat reduction and weight reduction.

There are significant advantages to employing a diverse workforce within an enterprise. Techniques for identifying gaps in diversity hiring, promotion, and termination within an enterprise are provided herein. The techniques described herein may be used to analyze any large data set for comparison of aggregated data. Employment data may be collected and aggregated based on classifications such as ethnicity, gender, veteran status, disability status, and so forth, and within each classification the data can be aggregated for hiring, termination, promotion, and so forth. Two aggregates can be identified for comparison, and statistical scores may be generated for the first aggregate as compared to the second aggregate. Each of the statistical scores may be weighted and the scores may be combined to generate a single impact score. The impact score can be used to identify gaps in diversity employment practices within the enterprise.

The invention provides a method for predicting the water cone drop height of a bottom water reservoir straight well. The method comprises the steps that 1, by utilizing reservoir numerical simulationsoftware, a numerical simulation conceptual model of the bottom water reservoir straight well is established; 2, by utilizing the established numerical simulation conceptual model of the bottom waterreservoir straight well, the quantitative relationship between the water cone drop height and the well shutdown time under all single influence factors is calculated; 3, by utilizing the calculated relationship between the water cone drop height and the well shutdown time under all the single influence factors, a prediction model of the water cone drop height of the bottom water reservoir straightwell under the multiple influence factors is established through multi-element nonlinear regression; and 4, by utilizing the established prediction model of the water cone drop height of the bottom water reservoir straight well, the water cone drop height is calculated. According to the method for predicting the water cone drop height of the bottom water reservoir straight well, the water cone drop height of the bottom water reservoir straight well after high-water-cut well shutdown is determined, so that the well re-opening opportunity of the oil well after anti-coning is reasonably determined, and the economic benefits of well re-opening production are increased.

The invention relates to a single-impact type vibration excitation device applicable to nondestructive tests of long anchor rods/long anchor cables. The device consists of a vibration excitation cone and a buffer device, wherein the vibration excitation cone adopts the structure of a two-section mechanism which comprises a vibration excitation cone body and a vibration excitation cone sharp end; the buffer device consists of a spring and a rubber pad; a step for accommodating the spring is arranged between the vibration excitation cone sharp end and the vibration excitation cone body, one end of the spring is fixed on the step, and the other end of the spring is connected with the rubber pad; the vibration excitation cone, the spring and the rubber pad are connected in series, mounted sequentially and kept to be concentric and in parallel. The device has the benefits as follows: low-frequency high-energy elastic wave signals can be produced, the test range and the working efficiency during quality tests on the long anchor rods and the long anchor cables are improved to a great extent, secondary vibration excitation can be effectively avoided, and the test precision is greatly improved; the device is simpler in overall structure and convenient to operate.