19results about How to "Reduce eccentric wear" patented technology

This utility model provides an anti-impact tread cleaner. A connecting seat is hinged to a piston rod, and a buffer sleeve is installed in the hinge hole. The piston rod has a mounting hole, into which a spring rod is inserted. The spring rod has a spring seat at its front end and is installed in a mounting hole on the rear cylinder head at its rear end. A return spring is sleeved on the spring rod, with its front end abutting against the spring seat on the piston rod and its rear end abutting against a gasket installed in the piston rod mounting hole. Each tooth of the rack has a trapezoidal cross-section, with the angle of the force-bearing surface on both sides being 73° to 77°. The angle of the side of the limiting pin that mates with the force-bearing surface is the same as the angle of the force-bearing surface. An exhaust hole is provided near the connecting seat at the end of the piston rod, and a first filter screen is provided on the exhaust hole. An air inlet is provided on the rear cylinder head, and a second filter screen is installed in the air inlet. This design prevents the rack from deforming upon abnormal impact, allowing the tread cleaner to operate normally. The filter screen can be reused after replacement, and the overall buffer sleeve increases the deflection angle of the connecting seat connected to the grinding wheel.

The utility model discloses a connecting structure of plunger pumps and a concatemer rotary valve, which belongs to the technical field of filling metering control and comprises a rotary valve sleeve, a plurality of plunger pumps and a connecting component used for connecting the rotary valve sleeve and the plunger pumps, and the rotary valve sleeve and the plurality of plunger pumps are supported by a fixed frame. The plunger pump comprises a plunger sleeve and a plunger rod installed in the plunger sleeve, the plunger sleeve comprises a plunger upper end, a plunger middle end and a plunger lower end, a flat milling position is machined on the outer wall of the plunger middle end, the connecting assembly comprises a connecting pipe, and the top end of the connecting pipe is connected with the bottom end of the rotary valve sleeve. The plunger pump and the rotary valve sleeve are connected through the connecting pipe, the connecting pipe is subjected to dual protection sealing through the sealing ring, screws or hoops are not needed for connection, parts are reduced, meanwhile, a certain floating space is achieved, assembly errors caused by multiple parts can be eliminated, the plunger pump is arranged to be the plunger upper end, the plunger middle end and the plunger lower end, and the assembly efficiency is improved. And the fixing bracket can be conveniently and quickly disassembled and assembled when being used for fixing.

The application provides a generator oversize retainer ring bulging process parameter optimization method and system, relates to the plastic processing technical field, and the method comprises the steps of constructing a multi-source sensor array, synchronously collecting trace gas concentration field information and sealing gap change information, forming a leakage original data set and a wear original data set respectively, obtaining a leakage characteristic parameter and a wear amount parameter, constructing a high-dimensional feature vector based on the leakage characteristic parameter and the wear amount parameter, calculating bulging uniformity, wear unevenness, wear leakage coupling abnormality index and instability risk index according to the high-dimensional feature vector, determining a bulging process state category according to a multi-threshold-based judgment logic tree, and generating a corresponding process parameter adjustment strategy according to the bulging process state category. The technical problems of isolated multi-source sensing information, incomplete state representation, lagging abnormality identification and lack of closed-loop control mechanism are solved.

The invention discloses an elasticizer yarn moving anti-eccentric-wear method and system based on dynamic stroke adjustment, and the method comprises the following steps: S1, a controller controls a motor I to rotate forwards and reversely at a constant speed through a frequency converter I, and the motor I drives a lead screw to be switched back and forth between forward rotation and reverse rotation; s2, forward rotation and reverse rotation of a lead screw drive a sliding block to reciprocate left and right along a guide rail, and a godet wheel is driven to reciprocate left and right; and S3, in the reciprocating motion process of the godet wheel, the first distance sensor and the second distance sensor are started by the controller. According to the invention, the stroke of the godet wheel is dynamically adjusted according to the wear condition of the godet wheel, so that the eccentric wear condition of the godet wheel is effectively reduced, and the service life of equipment is prolonged.

The present invention provides a method for optimizing the suspension point speed of a pumping unit based on a directional well, comprising: step one: importing the three-dimensional borehole data and sucker rod data, pumping parameters and reservoir parameters of the oil well; step two: establishing a finite element model and equilibrium equation of the sucker rod; step three: analyzing the fatigue life of the sucker rod; step four: constructing the suspension point speed with Fourier series; step five: determining the design variables, constraints and objective functions, and establishing a mathematical model for the real-time suspension point speed optimization design; step six: using a genetic algorithm to optimize the mathematical model in step five to obtain the optimal solution for the suspension point speed. The present invention achieves the purpose of reducing the eccentric wear of the sucker rod and thus extending the pump inspection cycle by changing the suspension point speed of the pumping unit without changing the existing pumping parameters, sucker rod column combination and number of centralizers of the oil well, thereby saving operating costs and improving development benefits.

The invention discloses a coil spring take-up and pay-off mechanism of a spiral lifting mechanism. A guide take-up and pay-off assembly comprises an upper guide assembly and a lower guide assembly. The upper guide assembly comprises a main guide wheel vertically arranged on the lifting base, an upper arc-shaped elastic piece fixedly arranged on the upper side of the bottom wall of the spring coiling disc and an upper elastic supporting body located at the free end of the upper arc-shaped elastic piece. The lower guiding assembly comprises a lower arc-shaped elastic piece fixedly arranged on the lower side of the bottom wall of the spring coiling disc and a lower elastic supporting body located at the free end of the lower arc-shaped elastic piece, and the upper arc-shaped elastic piece and the lower arc-shaped elastic piece are located at the two ends of the arc-shaped opening correspondingly and are oppositely arranged. The upper elastic supporting body and the lower elastic supporting body are spaced in the vertical direction and the horizontal direction. The transverse coil spring passes through the lower surface of the lower elastic supporting body from bottom to top and penetrates through the arc-shaped opening to be wound between the main guide wheel and the upper elastic supporting body, and the upper arc-shaped elastic piece and the lower arc-shaped elastic piece conduct self-adaptive adjustment on the retracting and releasing angle of the transverse coil spring.

The application provides a wheel bucket excavator and a wheel bucket excavator. The wheel bucket excavator comprises a bucket lip and a bucket tooth. A tooth edge of the bucket tooth is used for excavating materials. An end of the bucket tooth away from the tooth edge is fixedly connected with the bucket lip. The bucket tooth has a first surface, which is a surface facing the materials. An included angle between a projection of a movement direction of the tooth edge on the first surface and the tooth edge is between 85 degrees and 95 degrees. According to the scheme, the bucket tooth is arranged on the bucket lip. The bucket lip drives the bucket tooth to move, so that the tooth edge of the bucket tooth excavates the materials. When the included angle between the projection of the movement direction of the tooth edge on the first surface and the tooth edge is between 85 degrees and 95 degrees, the tooth edge has small eccentric wear, and the tooth edge is not prone to wear and breakage.

The application relates to the technical field of relays, in particular to a novel magnetic latching relay which comprises a shell, a contact mechanism fixedly installed in the shell, the contact mechanism comprising a first static foot and a second static foot, the first static foot and the second static foot being fixedly installed on one side in the shell, a first static contact being fixedly installed on the first static foot, a second static contact being fixedly installed on the second static foot, a rotating mechanism being rotatably connected to one side in the shell and located between the first static foot and the second static foot, two dynamic contacts being fixedly installed on the rotating mechanism and used for cooperating with the first static contact and the second static contact to realize circuit on-off, a pushing assembly being fixedly installed in the shell and used for driving the rotating mechanism to rotate, and an electromagnetic assembly being fixedly installed in the shell and used for driving the pushing assembly, through rotation of the rotating mechanism, the two dynamic contacts on the rotating mechanism are respectively attached to the first static contact and the second static contact, the single-contact stroke is shortened, and the working efficiency of the device is improved.

The application provides a self-cleaning hob of a disc cutter assisted by a cavitation water jet, which comprises a hob side plate, a disc cutter and a cleaning component; the disc cutter is arranged between the two hob side plates through a cutter shaft, the two ends of the cutter shaft are detachably arranged on the two hob side plates, and the disc cutter can rotate around the cutter shaft; the cleaning component is rotatably arranged on the side of the cutting edge of the disc cutter and can clean the cutting edge of the disc cutter; the disc cutter is provided with a transmission assembly, the transmission assembly is in transmission connection with the cleaning component; the transmission assembly can rotate together with the disc cutter, so as to drive the cleaning component to rotate; the scheme provided by the application can fundamentally improve the tunneling efficiency, solve the problem of mud accumulation of the cutter head of the tunneling machine, reduce the eccentric wear of the cutter ring, prolong the service life of the cutter, shorten the construction period and reduce the engineering cost, so as to achieve the purpose of reducing the construction burden and make up for the deficiency of the existing mud accumulation response measures of the cutter head.

The present application relates to a method for automatically regulating the deviation wear of the sucker rod in the horizontal well oil production, observing the load sensor after starting, at this time the load value is the maximum; the sucker rod rotates at a set speed or does not rotate while being lowered; during the lowering process, when the load weight starts to decrease, it means that the bottom device of the equipment touches the bottom of the sucker rod; the oil pumping is carried out under the current working parameters, and the real-time value of the torque is monitored; if the torque exceeds the set early warning torque, the optimization operation is executed, and the change of the torque after the optimization operation is judged; after the optimization operation, if the torque is lower than the set early warning torque, the normal mining is continued; if the torque still exceeds the early warning value after the speed and / or the range of lifting the sucker rod are exceeded, the sucker rod is lifted to the preset position, and the initial step is repeated; thereby effectively regulating the torque to make it in the best state, reducing or even avoiding the occurrence of deviation wear, greatly improving the service life of the sucker rod, and having good practicability.

This invention provides a straightening guide for a screw pump sucker rod, comprising: a housing; a plurality of straightening blocks evenly arranged on the outer surface of the housing; a top rod concentrically arranged inside the housing, with ball heads at both ends of the top rod; and connector assemblies disposed at both ends of the housing for connecting an upper sucker rod and a lower sucker rod, respectively. The connector assemblies include a ball-and-socket type connecting seat fixedly connected to the end of the housing and a ball-and-cap connector adapted to the ball-and-socket type connecting seat. The inner wall surface of the ball-and-socket type connecting seat is constructed as a first inner spherical surface, and an inner drive tooth is provided on the first inner spherical surface. The ball-and-cap connector includes a ball-and-cap body, the outer surface of which is provided with radially extending outer drive teeth, and the interior of the ball-and-cap body forms a second inner spherical surface adapted to the ball head. The outer drive teeth and the inner drive teeth mesh to form a meshing pair, allowing the ball-and-cap connector to bend relative to the housing and to straighten the sucker rod via the straightening blocks.

This invention discloses a flexible rod ultra-long stroke pumping unit, belonging to the technical field of pumping units. The flexible rod ultra-long stroke pumping unit includes a support frame, with an upper platform assembly at the top of the support frame. A cage ladder is fixedly connected to the outer side of the support frame. A drive device is located at the top of the upper platform assembly, and the drive device is connected to a flexible rod. A sucker plug is connected to the end of the flexible rod. A centering wheel assembly is located on the side of the support frame away from the cage ladder, through which the flexible rod passes. The drive device is also connected to a counterweight balancing mechanism. The flexible rod ultra-long stroke pumping unit achieves the reciprocating motion of the sucker rod by winding and releasing the flexible rod on a drum. Compared with various newly developed beamless pumping units on the market, it features a simple structure, small footprint, an ultra-long stroke of 18 meters, low stroke rate, and convenient maintenance.

The utility model relates to an overflow valve and a hydraulic system. The overflow valve comprises a valve body and a valve element, a valve cavity used for containing the valve element is formed in the valve body, and the valve element is connected to the valve cavity in a sliding mode. A liquid inlet and a liquid outlet which are communicated with the valve cavity are formed in the valve body, a liquid inlet cavity is formed in the first end of the valve element, and the inlet end of the liquid inlet cavity is communicated with the liquid inlet; an overflow hole communicated with the liquid inlet cavity is formed in the side wall of the valve element, and an overflow space communicated with the overflow hole is defined by the side wall, provided with the overflow hole, of the valve element and the side wall of the valve cavity; the valve core can move between a first position and a second position; at the first position, the overflow space is located between the liquid inlet and the liquid outlet; and at the second position, the overflow space is communicated with the liquid outlet, so that the fluid is discharged from the liquid outlet. According to the overflow valve, through the arrangement of the overflow holes, overflow fluid can be drained out stably, and the eccentric wear phenomenon of the valve body and noise generated by overflow are reduced.

The utility model provides a kind of pneumatic device structure, including cylinder barrel, lower end cover, upper end cover, piston rod, piston and spring;One end of cylinder barrel is connected with lower end cover, the other end of cylinder barrel is connected with upper end cover;Piston is arranged in cylinder barrel, and piston can move up and down in cylinder barrel;The space formed between cylinder barrel, lower end cover and piston is rod cavity, and the space formed between cylinder barrel, upper end cover and piston is rodless cavity;Spring is arranged in rodless cavity, and spring is located between piston and upper end cover, and the two end faces of spring are respectively in contact with piston and upper end cover;One end of piston rod penetrates lower end cover and is connected with piston;Rod cavity is connected with air compression device;Upper end cover is provided with through hole, and through hole penetrates upper end cover;The motion stability of air cylinder, reset reliability and overall durability can be improved.

An outer spring pump core relates to the technical field of pump cores and is used for solving the problems of material body pollution and accidental leakage caused by built-in spring. The pump core sleeves the spring outside the upper pressing rod to isolate the spring from the contact channel of the material body. The pump core comprises the upper pressing rod, the outer spring, the connector, the piston rod, the connecting rod, the body and the valve piece. The outer spring is installed between the upper pressing rod and the connector, and the connector is fixed to the body. The side wall of the connecting rod is provided with two channels, and the axis of the channels and the axis of the connecting rod form an included angle of 15°. The limiting assembly is composed of a limiting vertical rod and a limiting hole. The rotation of the limiting vertical rod can lock the position of the upper pressing rod to prevent accidental pressing. The pump core is suitable for cosmetic and food bottles, reduces the pollution risk, avoids leakage and prolongs the service life.

The utility model relates to the technical field of liquid chromatography detection and analysis, in particular to a self-adaptive plunger rod mechanism, which is characterized in that one end of a plunger rod and a floating plate are arranged to form a spherical contact matching structure, and a gap is formed between the floating plate and the inner side wall of a spacer bush in the operation process of a plunger pump, so that the position can be finely adjusted; the corresponding plunger rod can be adjusted in a self-adaptive mode, the problem that the coaxiality and the parallelism of the plunger rod, the pump head and the pump body are inconsistent due to machining errors, assembling errors and the like is solved, and the machining and assembling difficulty is lowered. Meanwhile, the problem that in the plunger pump, especially in a cam driving mode, the plunger rod is abraded by force with the continuously-changing direction in the cam operation process can be effectively solved, the plunger rod can be subjected to self-adaptive adjustment, eccentric abrasion is reduced, the service life is prolonged, and the influence on the liquid conveying amount precision is reduced. Meanwhile, the utility model further provides a high-pressure plunger pump.

The invention discloses a return spring structure for a disc brake caliper of a motorcycle. The return spring is formed into an upper turning part, an upper supporting part, a side supporting part, a lower supporting part and an elastic piece part through a mold. The upper supporting part and the lower supporting part are arranged in parallel and connected to the inner side clamp body and the outer side clamp body, a U-shaped structure is formed between the upper supporting part and the lower supporting part through the side supporting parts, the two sides of the lower supporting part are symmetrically connected with the elastic piece parts respectively, and the upper supporting part obliquely extends upwards to form an upward turning part. The elastic piece parts on the two sides are used for being connected with brake pads of an inner side caliper body and an outer side caliper body of the disc brake caliper correspondingly. By means of the structural design, the return spring has a good return function, and after the braking working condition is finished, the brake pad can be quickly returned, so that the residual dragging torque of the brake caliper is effectively reduced, the braking noise is reduced, and the abnormal sound generated when the brake pad impacts a brake disc under the non-braking working condition is avoided.

The utility model discloses a mobile X-ray machine rack brake structure, and relates to the field of X-ray machine racks, the mobile X-ray machine rack brake structure comprises a rack vehicle body, a rotating shaft is rotatably connected in the rack vehicle body in a penetrating manner, wheels are arranged on both sides of the rack vehicle body, and a brake assembly used for braking the wheels of the X-ray machine rack is arranged outside the rotating shaft; the cams are made to rotate through the pedal, the bearings on the brake rods are moved to the locking grooves of the cams, so that the friction blocks abut against the wheels, the braking effect is achieved, manual fixing is not needed, the use convenience is improved, the cams on the two sides can rotate at the same time through use of the rotating shaft, the two friction blocks make contact with the wheels synchronously, and the braking effect is improved. The braking force is ensured to be uniformly distributed, eccentric wear of the brake pad or reduction of the braking efficiency caused by single-side pressure application is prevented, and the brake rod and the sliding block are fixed and released by using the first stud and the fixing block.