120 results about "Working life" patented technology

The invention discloses a water-based multi-layer degradable self-polishing ship antifouling coating system and a preparation method thereof, and belongs to the field of marine anticorrosion and antifouling materials. The system is composed of a zinc-rich primer, a modified epoxy intermediate paint and a functionalized finish paint. The finish paint takes polyhydroxyalkanoate as a matrix, and integrates a self-stratification modifier capable of forming a silicon-rich top layer during curing and a latent dual-curing system capable of realizing normal-temperature curing through a synergistic effect. According to the present invention, the mixing mechanism of dynamic self-polishing and static fouling release is adopted, and the innovative curing technology is combined, such that the long working life, the excellent mechanical property and the long-acting antifouling ability are achieved. The drawing adhesive force of the system is not lower than 7.9 MPa, and the environment-friendly requirements that the content of volatile organic compounds is smaller than or equal to 50 g / L, and the content of free diisocyanate monomers is smaller than or equal to 0.1 wt% are met.

The invention discloses a magnesium alloy electric drive main shell mold wear detection method and system based on machine vision, and belongs to the technical field of mold predictive maintenance. According to the method, three-dimensional point cloud, a surface texture image and an infrared thermogram of a mold are synchronously collected, and point cloud data fused with multi-modal information is generated through multi-sensor joint calibration and high-precision registration; geometric, texture and thermodynamic features are extracted and fused from the features, and a cross-modal feature vector is constructed; intelligent judgment of the wear level of the mold and accurate prediction of the remaining service life are achieved through the trained LightGBM ensemble classification model and the long-short-term memory network time sequence regression model; and finally, associating and visualizing the evaluation result and the three-dimensional model, and automatically generating a structured detection report. According to the method, comprehensive quantification, intelligent evaluation and accurate prediction of mold wear are realized, and the detection efficiency and the scientificity of maintenance decision are remarkably improved.

The invention relates to the technical field of image equipment, and discloses a control method and system for a refrigeration module of a closed cavity, and the method comprises the steps: obtaining the temperature of the refrigeration module, the error of refrigeration module temperature detection equipment, the temperature of a heating end, the temperature of the cavity and the humidity of the cavity in real time; determining a target temperature interval according to the cavity temperature, the cavity humidity, the refrigeration module temperature detection equipment error, the heating end temperature and the cavity temperature; and the working state of the refrigeration module is adjusted according to the refrigeration module temperature and the target temperature interval. By adopting the method and system provided by the invention, the temperature of the refrigeration module can be effectively controlled, the internal temperature of the closed cavity is reduced, the heat emitted by the heating end of the device is released, the condensation phenomenon on the refrigeration module is prevented, and the service life of equipment is prolonged; meanwhile, the working state of the refrigeration module is adjusted by taking the target temperature interval instead of a single temperature point as a reference, and the situation that the service life of the refrigeration module is shortened due to frequent switching on and off of the refrigeration module is avoided.

The present invention provides a two-phase jet cooling radiator for high-power density chips, belonging to the technical field of chip cooling and heat dissipation. The cooling radiator includes a coolant cavity housing, a jet manifold layer, a jet flow channel plate, and a porous medium layer; a liquid distribution cavity is formed in the coolant cavity housing; a jet cavity is formed in the jet manifold layer, and jet holes are uniformly distributed on the jet cavity; the jet flow channel plates are all installed in the jet cavity, and their jet flow channels are all arranged vertically, and one end of each jet flow channel is connected to the corresponding jet hole; the gaps between the jet flow channel plates in the lower space of the jet cavity are filled with the porous medium layer. The present invention utilizes the influence of the small-aperture porous medium layer on bubble dynamics, improves the critical heat flux density in the heat dissipation process, increases the heat dissipation per unit area, prolongs the working life of the chip, improves the working stability of the chip, and plays an important role in ensuring the stable operation of the chip under the working conditions of high heat flux density and high integration.

The present invention relates to the technical field of electric spindle cooling, and particularly relates to a high-speed electric spindle core cooling device and a using method thereof, including: a spindle core, a liquid distribution plate, and a liquid supply plate for supplying liquid to the liquid distribution plate; the spindle core has a plurality of first passages and a plurality of second passages, and the liquid distribution plate is provided with a plurality of guiding passages; the liquid supply plate is provided with a plurality of drainage tubes corresponding to the guiding passages, one end of the drainage tube is fixed on the liquid supply plate, and the outer cylindrical surface of the other end is provided with a sealing ring and is embedded in the guiding passage; a sliding sleeve is arranged on the outer side of the liquid supply plate, the sliding sleeve is fixedly connected with the liquid supply plate and is slidably arranged with the liquid distribution plate, a driving member is arranged on the sliding sleeve, and the driving member drives the sliding sleeve to drive the liquid supply plate to move towards or away from the liquid distribution plate, so that the drainage tube makes a telescopic movement in the guiding passage, accelerating the flow rate of the cooling liquid, improving the cooling efficiency, reducing the temperature rise inside the electric spindle, improving the performance of the electric spindle, and prolonging the working life of the electric spindle.

The utility model discloses a front and rear protection device of a rotating mechanism, which relates to the technical field of road snow removal equipment and comprises a rotating mechanism front protection cover and a rotating mechanism rear protection cover which are respectively arranged on the front side and the rear side of a side row rotating mechanism; the rotating mechanism front protective cover is fixed on the icebreaking machine frame body; the rotating mechanism rear protection cover is rotatably arranged on the icebreaking machine frame body, one end of the rotating mechanism rear protection cover is rotatably installed on the icebreaking machine frame body through a pivot shaft, and a shovel blade is fixed to the other end of the rotating mechanism rear protection cover; the lower side of the rotating mechanism rear protection cover is rotatably connected with one end of a hydraulic cylinder, and the other end of the hydraulic cylinder is rotatably connected with the icebreaking machine frame body. According to the utility model, foreign matters can be prevented from entering the high-speed rotating side-row rotating mechanism, the side-row rotating mechanism is prevented from being damaged, the maintenance cost is reduced, and the service life of equipment is prolonged.

According to the mining cooling garment, the spiral fiber material and the preparation method, the cross section of the prepared spiral fiber is in a special shape, and compared with a traditional fiber with the circular or oval cross section, under the condition of the same diameter, the special-shaped fiber is larger in surface area and higher in heat dissipation capacity. The section of the profiled fiber is in a special shape, so that cohesive force among the fibers is stronger, the anti-laddering performance can be obviously improved, and the service life of the cooling clothes in a severe working environment is prolonged. Due to the spiral structure, the elasticity of the fibers is higher, the fibers can better adapt to body changes, the comfort degree is improved, the movement freedom degree is increased, and the fabric durability is enhanced. The spiral fiber material provided by the invention is used for preparing cooling clothes, so that the effects of ventilation and perspiration can be realized, the load of a wearer is reduced, and the service time is prolonged.

The invention discloses an underground intubation type long-acting separation and production combination tool, and relates to the technical field of long-acting obstructors, the underground intubation type long-acting separation and production combination tool comprises a central tube, fixing blocks are fixed on the outer side of the upper end of the central tube at equal angles, the fixing blocks and a connector are mutually fixed, and the inner side of the connector is slidably connected with a sealing mechanism used for sealing a production tube. According to the underground intubation type long-acting separation and production combined tool, the cleaning mechanism is adopted, and axial gravity is converted into rotation torque through the spirally-distributed rollers, so that when the tool is put down, the cambered surface plate is tightly attached to the pipe wall under the thrust of the air bag; the friction force between the spiral rolling wheel (30-60-degree lead angle) and the pipe wall generates tangential component force enabling the whole rotating assembly (the circular ring, the cambered surface plate and the scraping plate) to rotate around the central pipe, the scraping plate rotates along with the tangential component force, attachments in the circumferential direction are scraped away, the process penetrates through the whole tripping-in stroke, the pre-treatment effect on the well wall of the sealing section is achieved, and the service life of the sealing section is prolonged. And the contact quality and the service life of the follow-up sealing rubber cylinder and the metal slip are obviously improved and prolonged.

The utility model belongs to the technical field of high-temperature flow field testing, and particularly relates to a sweating cooling type high-temperature water-cooling double-hole dynamic pressure probe for measuring a subsonic three-dimensional flow field. The device is composed of a probe supporting rod, a probe head, a sleeve, a mounting seat, a positioning hole, a cooling water inlet pipe, a cooling water outlet pipe, a cable, a diverging wall surface, an impact wall surface, a current limiting wall surface, a circumferential separation baffle plate, a dynamic pressure sensor and the like. Cooling water enters the probe through the water inlet pipe, after the probe head is subjected to impact cooling, one part of the cooling water permeates to the surface of the diverging wall face in the radial direction to sweate and cool the probe, and the other part of the non-permeated part flows out of the probe in the axial direction after being heated through convection heat exchange. The cylindrical surface and the diagonal plane of the probe head are respectively provided with a pressure measuring hole, so that three-dimensional flow field measurement can be realized. The probe has the advantages that the probe cooling efficiency is greatly improved by adopting sweating cooling, the probe head is also cooled, the service life of the probe in an extreme high-temperature environment (the highest temperature reaches 2500 DEG C) is prolonged, and the reliability of a measurement result is improved.

The invention relates to the field of laser processing equipment devices, in particular to a high-speed cladding myriawatt laser head device for an ultra-long deep hole inner wall, which comprises a laser head with a myriawatt-level laser device internally provided with a light path system, and a deep hole self-adaptive mechanism adaptive to the laser head to realize adjustability, the heat dissipation system is formed by cooperation of a water cooling channel and an air cooling channel. Compared with the prior art, the laser head device has the advantages that the myriawatt-level laser, a light path system internally provided with an integrated collimating lens set and a dynamic focusing lens set and the like are adopted in the laser head device, the adjustable deep hole self-adaptive mechanism is matched, the uniformity of cladding machining light spots in a hole is improved to 95%, the cladding efficiency reaches 2.5 m < 2 > / h, and the laser head device is suitable for large-scale production. The thickness error of a cladding layer on the inner wall of the deep hole is smaller than or equal to + / -0.1 mm, the porosity is smaller than 0.5%, and the continuous working life of a laser cladding device is longer than or equal to 500 h by adopting a heat dissipation mode combining air cooling and water cooling.

The invention relates to a centrifugal fan, in particular to an integrated centrifugal fan. The invention aims to provide the integrated centrifugal fan which integrates multiple environment applicability and automatic applicability operation and prolongs the service life. According to the technical scheme, the device comprises a mounting cabin, a first electric sliding rail is mounted above the left side of the mounting cabin, and second electric sliding rails are mounted on the front side wall and the rear side wall of the mounting cabin. According to the integrated centrifugal fan, by means of the mode that the air guide devices with the air wheels of different structures are automatically replaced in the air guide cabin, the application environment of the integrated centrifugal fan can be wider, the use state of the integrated centrifugal fan can be rapidly switched according to needs when gas or powder is extracted in the same environment, and the integrated centrifugal fan is convenient to use. The service life of the integrated centrifugal fan is prolonged, the centrifugal fan and a matched pipeline do not need to be replaced as traditionally, and the efficiency of extracting gas or powder from the environment is improved.

The utility model provides ironing equipment. The ironing equipment comprises an ironing device and a fan assembly, the fan assembly is arranged on the ironing device; the ironing device is provided with an air suction channel, the fan assembly is communicated with the air suction channel, the air suction channel is provided with an air suction opening, the fan assembly is configured to enable the air suction opening to generate suction force, the fan assembly comprises a fan shell, a fan and a separator, the fan is arranged in the fan shell, and the separator is located between the outer wall of the fan and the inner wall of the fan shell; the interior of the fan shell is divided into a ventilation cavity and an isolation cavity by the isolation piece; the fan is provided with a wiring end, and the wiring end is located in the isolation cavity, so that single-hand ironing is achieved, the situation that the wiring end is damaged by sucked high-temperature steam and dust is prevented, and the service life of the fan is prolonged.

The invention relates to a sealing lip inclined type bidirectional dynamic pressure oil seal which comprises an annular rubber body, an oil seal main lip and a dustproof lip are arranged in the middle of the oil seal of the annular rubber body, and an included angle alpha is formed between the oil seal main lip and the vertical plane of the axis center. Due to the fact that the sweeping bandwidth of the oil seal lip on the shaft is far larger than the contact bandwidth of the main lip, the lubricating condition of the sealing lip is greatly improved, friction heating at the position of the sealing lip is remarkably reduced, meanwhile, the heat dissipation area is increased, the temperature of the oil seal lip is reduced, and the service life of the oil seal lip is prolonged.

The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a soft package battery positioning push plate which comprises an installation seat, a push plate installation plate, a sliding block installation plate, a guide rail sliding block assembly, a guide shaft, a compression spring and a push plate body. The guide rail sliding block assembly is fixed to the sliding block installation plate, the bottom of the push plate installation plate is fixedly connected with the sliding block installation plate, one end of the guide shaft is fixedly connected with the push plate installation plate, the other end of the guide shaft penetrates through the upper portion of the installation base and is in sliding fit with the installation base, the guide shaft is sleeved with the compression spring, and the compression spring is fixed to the guide rail sliding block assembly. And the push plate is fixed at the lower part of the push plate mounting plate and extends out from one side. The buffering mode that the guide rail sliding block assembly replaces a guide shaft guide sleeve is adopted, it can be guaranteed that a battery is accurately and stably positioned, the service life is long, and quick-wear parts such as the guide shaft do not need to be frequently replaced.

This utility model belongs to the field of electronic engineering measurement technology, specifically a test fixture for a small-power pulse transformer, including a transformer body; a connecting disc rotatably connected to the bottom inner side of the transformer body; a first gear rotatably connected to the top inner side of the transformer body; and a transmission gear ring rotatably connected to the top inner side of the transformer body; the transmission gear ring meshes with the first gear; and multiple sets of fan blades are arranged inside the transmission gear ring; during operation, the first gear is activated, causing it to rotate in the opposite direction. The first gear can interact with the elastic connecting plate through its teeth, thereby driving the connecting disc to rotate. The connecting disc can then be wound up with the fixture connecting wire fixed on its surface, thus reducing the risk of the existing fixture connecting wire being exposed to the outside for extended periods, leading to folding or damage. The overall device improves the working life of the fixture connecting wire and enhances the overall measurement efficiency.

A tubing assembly is provided that can comprise a plurality of tubes or lumens that can be disposed within a head of a peristaltic pump. The tubing assembly can provide a flow rate or volume capacity that is generally equal to or greater than that achieved with a comparable prior art tube while operating at higher pressures than that possible using the prior art tube. Further, in accordance with some embodiments, the tubing assembly can achieve a longer working life than a comparable prior art tube, and the load on the pump motor can be reduced such that the pump life is increased and / or a larger pump motor is not required to achieve such advantageous results.

This utility model relates to the field of medical device technology, and in particular to an artificial kidney dialysis solution preparation device, including a body assembly, the body assembly including a body body; two mounting slots are formed inside the body body; a synchronous drive assembly is provided at the bottom of the body body; and two permanent magnet rotors are provided at the output end of the synchronous drive assembly. This allows for the simultaneous and independent preparation of solution A and solution B, avoiding mixing and precipitation. Simultaneously, the stirring shaft inside the separate preparation tank is driven by a non-contact magnetic force transmission between the permanent magnet rotor and the permanent magnet ring, allowing the separate preparation tank to be removed from the mounting slot on the body body for easy cleaning and maintenance. Furthermore, the non-contact magnetic force transmission eliminates frictional losses associated with traditional gear or belt drives, extending equipment lifespan and reducing the risk of corrosive liquids eroding metal parts, significantly improving the working life of the preparation device.

The invention relates to the technical field of textile after-finishing, and discloses a production process of anti-static work clothes, which comprises the following steps: activating the surface of a base material fabric; padding the fabric by using a controlled release type functional finishing liquid prepared from a core functional monomer, boric acid as a dynamic protective agent and the like; and carrying out multi-stage temperature control baking on the padded fabric. According to the invention, the dynamic protective agent can temporarily close the active group of the core functional monomer and inhibit the self-condensation of the core functional monomer in the finishing liquid, so that the working life of the working liquid is prolonged; in the high-temperature baking stage, the protected active groups are dissociated and released, covalent bonding is carried out on the surfaces of the activated fibers, and a cross-linked network is formed on the surfaces of the fibers. The chemical bonding anti-static functional layer is constructed on the surface of the fiber, so that the work clothes have excellent washing resistance and stable product quality, and meanwhile, the finishing process is high in stability and suitable for industrial production.

The present application relates to a kind of structural novel rod end driving bearing device, including stator assembly, rotating assembly, lubricated bearing assembly, front end power input component, tail end kinetic energy output driving component and buffer resistance component.The shell of bearing device is set to facilitate safe operation fixed type, rotating assembly is set to help reduce noise pollution and environmental interference built-in type, lubricated bearing assembly adopts double oil groove type to help rod body high-speed smooth operation, the outer leakage groove in buffer resistance component provides an efficient drainage channel for the dust or dirt of external environment inevitably sucked into the intersection of fixed component and rotating component during work, can ensure that bearing is in normal operation in pollution-free environment, to significantly improve the working stability and normal working life of bearing device, simple and reasonable structure, stable and safe and reliable work, both strong load capacity and anti-interference ability, and daily maintenance workload and use cost are low, have strong practicality.

The application discloses a kind of thrust end face friction pair surface precision machining method, belong to friction pair processing field, plane rough grinding, plane fine grinding and polishing combined machining process are successively used to process thrust end face friction pair surface, wherein plane rough grinding and plane fine grinding use white corundum grinding wheel, and plane polishing uses cubic boron nitride grinding wheel.The application uses grinding wheel plane grinding and polishing combined machining process, reduces the roughness value of thrust end face, reduces surface microstructure stress concentration, obtains smooth and strengthened working surface, improves the carrying capacity of thrust end face, wear resistance, prolongs the working life of thrust end face friction pair.

The invention relates to a humidifier which is supplied with water by a pipeline and works continuously for a long time, and ideal sanitary conditions and service life can be ensured by freely replacing consumables and key parts. Which comprises a base, a control circuit board and a bin gate, and is characterized by comprising a water supply connector, a water treater, a water level control device, a working water tank, an atomizing head, a water level detection device, a sanitary treatment device, a wrapping air supply device and a main machine head, wherein the water supply interface, the water treater, the water level control device and the main machine head are in butt joint one by one through waterway channels; the water treater, the working water tank and the atomizing head can be freely disassembled and assembled; the main machine head is fixed on the base, the carrying air supply device is fixed on the main machine head, and the working water tank and the atomizing head are detachably mounted on the main machine head.

The utility model discloses a contact switch, including circuit substrate, first fixed contact and first contact spring, be equipped with the power module of control machine opening and closing on circuit substrate, first fixed contact and first contact spring with power module electric connection, make first contact spring and first fixed contact can pass through power module control machine opening and closing, because first contact spring and first fixed contact simple structure personally, have not set up the shell body and wrapped first contact spring and first fixed contact, make first contact spring and first fixed contact even contaminate various dust or moisture, after machine work is completed, can very easily wipe dry and blow dry dust or moisture on first contact spring and first fixed contact, have the advantage that easy to clean, prolong the working life of machine. The utility model discloses still a kind of including the cleaning gun of above-mentioned contact switch.

The application relates to a method for prolonging the service life of a turbine disc, and relates to the technical field of a turbine disc of an aero-engine. The method comprises the following steps: heating a first region of the turbine disc and heating a second region of the turbine disc; obtaining a first real-time temperature of the first region and a second real-time temperature of the second region; if the first real-time temperature reaches a first temperature threshold corresponding to the first region, stopping heating the first region; if the second real-time temperature reaches a second temperature threshold corresponding to the second region, stopping heating the second region; wherein the first temperature threshold and the second temperature threshold are different. Different temperatures are used to heat different regions of the turbine disc, so that controllable elastic-plastic deformation of the turbine disc occurs, the crack tip is blunted, the damage tolerance is improved, the fatigue life at the center hole of the turbine disc is prolonged, and the service life of the turbine disc is significantly prolonged.

The invention provides a conveyor belt cleaning head and a conveyor belt cleaning device.The conveyor belt cleaning head comprises a scraper assembly which comprises an extension rod, a connecting shaft and at least one set of scrapers, the scrapers are arranged at the first end of the extension rod, and the connecting shaft is arranged at the second end of the extension rod; a mounting through hole is formed in the center shaft of the elastic plug block, and at least one extrusion cavity is further formed in the peripheral side of the mounting through hole; the connecting seat comprises a connecting cylinder and a connecting beam arranged on the outer surface of the connecting cylinder, and the elastic plug block is embedded in an inner cavity of the connecting cylinder; and the connecting shaft penetrates through the mounting through hole and is fixedly connected with the elastic plug block. According to the conveyor belt cleaning head, the elastic plug block with the lightening hole structure is adopted, the elastic plug block embedded in the connecting cylinder has a better elastic effect through the lightening hole, the elastic plug block is easier to elastically deform and reset, the damage probability of the scraper is reduced, and therefore the service life of the whole conveyor belt cleaning device is prolonged.

The invention belongs to the technical field of aircraft environment control, and discloses an efficient active rotational flow airborne water removal device which comprises a shell, a motor, a water collection cavity, a rotor impeller, stator blades and a main shaft, an axial cavity is formed in the shell, the main shaft driven by the motor is axially arranged in the cavity, and a device inlet is formed in the radial direction of the shell. A rotor impeller driven by the main shaft to rotate is arranged in the cavity corresponding to the device inlet, stator blades are arranged on the downstream of the rotor impeller, a water collecting cavity is arranged on the downstream of the stator blades, and the device outlet is formed in the radial direction of the shell at the rear end of the downstream of the water collecting cavity. By means of the structural design, the size and the weight of the water removal device are greatly reduced, the water removal device can be widely applied to an airborne air supply system, the centrifugal water removal mode and the spiral-flow type water removal mode are combined, the water removal efficiency can reach 99% or above, the water removal effect is stable, the water removal device is not affected by front-end air supply, the requirement for the moisture content of the air supply is met, and the service life of the air supply system is prolonged. And the comfort of passengers and the working life and reliability of airborne equipment can be greatly improved.

This invention relates to the field of robot health management and intelligent operation and maintenance technology, specifically a robot fault prediction system based on artificial intelligence algorithms. The system includes: a data acquisition module for collecting multi-dimensional sensor time-series data of the robot and constructing an N-dimensional time-series tensor from the collected data; a manifold mapping module for constructing a real-time updated health phase diagram; a risk assessment module for calculating the spatial distance between the current state point and a preset ideal health manifold, quantifying the physical degradation pressure of the equipment, and generating a probability distribution of the remaining effective working life; a decision generation module for acquiring external spare parts supply chain data and generating dynamic maintenance work orders; and a feedback closed-loop module for executing the dynamic maintenance work orders. This invention effectively solves the problem that traditional fixed threshold schemes are difficult to handle complex working conditions and nonlinear characteristics, significantly improving the sensitivity of fault precursor identification.

The utility model belongs to the field of household kitchen ware, and particularly relates to a vertical eggbeater which comprises a supporting seat. The top of the supporting seat is fixedly connected with an adjusting assembly. A shell is installed in the middle of the adjusting assembly. The top of the supporting seat is fixedly connected with a cylinder; a motor is fixedly connected to the bottom of the inner side wall of the shell; the output end of the motor is fixedly connected with a rotating shaft; the middle part of the rotating shaft is fixedly connected with a first bevel gear; the bottom of the inner side wall of the shell is rotationally connected with a second bevel gear. The first bevel gear is meshed with the second bevel gear; the bottom of the second bevel gear is fixedly connected with a stirring rod; the stirring rod and the shell are arranged in a penetrating manner and are rotationally connected; by arranging the fan blades, the rotating shaft can drive the fan blades to rotate together and blow air to the motor, cooling of the surface of the motor by the device is achieved, heat generated when the surface of the motor works is reduced, it is ensured that the motor can be at a proper working temperature, and the service life of the motor is prolonged.

The present invention relates to a rod-end high-speed drive bearing device with a reasonable structure, which mainly includes an intermediate stator component, a peripheral rotating component, a lubricating bearing component, a front-end power input component and a rear-end kinetic energy output drive component, and a buffer and leakage prevention component arranged between the fixed component and the rotating component. By applying the principle of aerodynamics, an efficient excretion channel is reasonably set for the external dust or dirt that is inevitably sucked into the junction of the fixed component and the rotating component during operation, which effectively overcomes the problem in the prior art that the sucked-in dust or dirt is squeezed in and then retained above the oil tank under high pressure, causing damage to the oil seal and squeezing into the oil tank, affecting the normal operation of the ball bearing, thereby affecting the working stability and normal working life of the bearing device, and requiring frequent shutdowns for maintenance, affecting the construction progress and work efficiency, and increasing the maintenance workload and daily use costs. The structure is reasonable and scientific, the operation is reliable and stable, and it has strong practicality.

A double-roller crushing device for abrasive machining comprises rotating rollers which are arranged in pairs and driven by a power device to rotate and work, the two rotating rollers are arranged side by side, polycrystalline diamond layers are arranged on the peripheral faces of the rotating rollers, the double-roller crushing device further comprises a shell, and the rotating rollers are arranged in the shell. A material receiving groove is formed in the position, corresponding to an area formed by projections of the outer side faces and the end faces of the two rotating rollers, of the inner bottom of the shell, and abrasion-resistant ceramic protective layers are arranged on the material receiving groove and the inner wall of the shell. According to the rotating roller, the polycrystalline diamond material is selected as the working surface layer of the rotating roller, the hardness of the rotating roller is equal to that of diamond, the rotating roller is formed by sintering diamond micro-powder and a binder at high temperature and high pressure, the size can be several centimeters and is larger than that of a diamond crystal, and the rotating roller has cuttable and weldable workability; the wear resistance and durability of the equipment can be ensured, and batch production can be carried out; and the feeding device arranged at the upper part of the shell adopts a flat opening design, so that uniform blanking is facilitated, local abrasion of a roller surface is reduced, and the service life of equipment is prolonged.

The invention relates to a hydraulic piston pump which is composed of a main reversing valve, a first pilot valve, a second pilot valve, a power cylinder barrel, a power piston, a piston rod, a pump barrel, a pump piston and the like. The pilot valve drives the trigger rod to change the position, reversing of the main reversing valve is completed, and therefore the flowing direction of power liquid and spent liquid is changed, reciprocating motion of a power piston in a power cylinder barrel is achieved, meanwhile, a pump piston is driven to reciprocate in a pump barrel, and the suction and lifting effects on well liquid are completed. During working, power liquid leakage is avoided, efficiency is improved, energy consumption is reduced, a low-stroke-frequency and long-stroke structure of the pump can be achieved, the working frequency of moving parts is reduced, abrasion is relieved, and the working life is prolonged.