37results about "Crossheads" patented technology

A connecting rod assembly includes a crosshead for coupling a connecting rod to a plunger, the crosshead having a hole extending through the crosshead. The connecting rod assembly also includes a knuckle cage positioned within the crosshead, the knuckle cage extending through the hole and including a cutout to provide access to a passage formed in the knuckle cage. The connecting rod assembly further includes a knuckle positioned within the passage of the knuckle cage, the knuckle having a mounting surface that is substantially planar, the mounting surface coupling to the connecting rod at a mating end with a substantially planar mating end surface.

A connecting rod assembly includes a crosshead for coupling a connecting rod to a plunger, the crosshead having a hole extending through the crosshead. The connecting rod assembly also includes a knuckle cage positioned within the crosshead, the knuckle cage extending through the hole and including a cutout to provide access to a passage formed in the knuckle cage. The connecting rod assembly further includes a knuckle positioned within the passage of the knuckle cage, the knuckle having a mounting surface that is substantially planar, the mounting surface coupling to the connecting rod at a mating end with a substantially planar mating end surface.

A hybrid lubricating module includes a housing and an assembly which consists of at least two elements and has an axial hole run through by a shaft. At least one of the elements has one set of multiple notches on one end surface communicating with the axle hole. The housing has a through axial cavity to encase the assembly. The outer wall surface of the assembly and the inner wall surface of the housing are assembled to each other to form at least one storage chamber to store lubricating media. The multiple notches on at least one adjacent element form at least one set of fine flow passages communicating with the axial hole and the storage chamber.

The invention relates to a shape line optimization method and device and a plunger pump. The method comprises the steps that a current plunger pump simulation model is adopted to conduct simulated fracturing operation, surface pressure data corresponding to a bearing bush model in the simulated fracturing operation are obtained, if the surface pressure data do not meet a preset standard, deformation corresponding to the bearing bush model is fitted, a shape line model is obtained, and a bearing bush model is obtained; according to the shape line model, shape line parameters of the bearing bush model and / or the connecting rod model are adjusted, a next plunger pump simulation model is determined, and fracturing simulation operation is repeatedly carried out to obtain surface pressure data corresponding to the bearing bush model until the surface pressure data meet a preset standard; by adopting the method, the contact state between the inner surface of the bearing bush and the outer surface of the journal of the connecting rod is improved by modifying the bearing bush and / or the connecting rod without changing the macrostructure size of the bearing bush, so that the contact surface pressure between the bearing bush and the journal is more uniform, and the service life of the bearing bush is prolonged while the abrasion of the bearing bush is reduced and the cost is reduced.

A universal joint bearing includes a trunnion, a cup, rolling elements rotatably supporting the cup relative to the trunnion, and at least one seal for sealing a space between the trunnion and the cup. The cup has a substantially cylindrical surface, which is a part of a radially outer surface of the universal joint bearing. All of the rolling elements of the universal joint bearing are arranged in a certain number of rows of rolling elements. A sum of the maximum axial lengths of all the rows of rolling element divided by the sum of the maximum axial length of the substantially cylindrical surface and the maximum axial length of a radially outer surface of the at least one seal, which is another part of the radially outer surface of the universal joint bearing, is between 0.6 and 0.75.

The invention discloses a self-adaptive locking cross-shaped joint sliding block and pyramid sleeve, and relates to the technical field of cross-shaped joint sliding blocks and pyramid sleeves, the self-adaptive locking cross-shaped joint sliding block and pyramid sleeve comprises a cross-shaped sliding block, a conical sleeve, a storage box, a lubricating flow limiting assembly and an oil outlet control assembly, the conical sleeve is installed on the outer wall of the cross-shaped sliding block in a penetrating mode, and the storage box is installed on the inner wall of the cross-shaped sliding block; a lubricating flow limiting assembly is installed on the outer wall of the storage box in a penetrating mode. A first motor is installed to rotate to drive a collecting wheel to rotate, the collecting wheel rotates to drive a pull rope to move, the pull rope moves to drive an L-shaped supporting plate to move, the L-shaped supporting plate moves to drive a first spring to move, the first spring moves to enable the L-shaped supporting plate to drive a first pulley to move, and the first pulley moves to enable the L-shaped supporting plate to move away from an L-shaped sealing pad; at the moment, the pipeline is opened, so that the lubricating oil is discharged to the surface of the crosshead shoe through the oil outlet head, and the crosshead shoe is lubricated during movement, so that the functions of automatically lubricating the crosshead shoe, prolonging the service life of the crosshead shoe and improving the use stability are realized.

The high-precision piston rod connecting structure comprises a piston rod, the upper end of the piston rod is connected with a piston body, the lower end of the piston rod is connected with a crosshead, the upper end of the crosshead is connected with a positioning flange with a center hole, and the lower end of the piston rod is a reducing end transited through a conical surface section. The reducing end penetrates through the center hole of the positioning flange and is stretched and locked by a first fastening structure; the upper section of the center hole of the positioning flange is a taper hole matched with the conical surface section of the piston rod; the upper end of the piston rod penetrates into a center hole of the piston body, is stretched and locked by a second fastening structure and is provided with an anti-rotation structure. Automatic centering is achieved through conical surface matching, stable pre-tightening force is provided in cooperation with a double-fastening structure, the problems that a traditional connecting structure is insufficient in precision and poor in locking reliability are effectively solved, the operation precision and stability of a compressor are greatly improved, and meanwhile the compressor connecting structure has the advantages of being convenient to install and maintain and long in service life.

The present invention discloses a tower-type three-chamber RTO switching valve mechanism. Aiming at the switching valve movement during the incineration of high-volume, high-concentration, and volatile organic waste gas, the mechanism incorporates the following structures: (1) a three-stage sealing structure consisting of graphite packing, compressed air, and a skeleton oil seal; (2) a flexible connection and compensation structure constructed of a fisheye joint and a Y-shaped joint; (3) a dual anti-slip structure constructed of a threaded pair and an anti-slip clamp; and (4) an adjustable support roller structure. This mechanism solves the problems of easy wear, leakage, easy detachment, and difficulty in adjustment during the operation of the switching valve, ensuring efficient and stable operation of the switching valve.

To provide an inexpensive bearing enabling simple design and bearing operation with excellent abrasion resistance.SOLUTION: The present invention relates to a bearing comprising a bearing shell 2 and bearing pins 1, 11, 12 with a rotational axis X, and the bearing pins 1, 11, 12 are arranged rotatably around the rotational axis X in the bearing shell 2. The bearing pins 1, 11, 12 comprises weakening points 3, which are asymmetric with respect to the rotational axis X, so that the bearing pins 1, 11, 12 are deformed by the action of external force F acting in the direction of the bearing shell 2. Therefore, the effective area of force between the bearing shell 2 and the bearing pins 1, 11, 12 can be increased via the deformation of the bearing pins 1, 11, 12.SELECTED DRAWING: Figure 2

The application discloses a novel joint assembly which comprises a flange fork, a cross pack assembly and a welded fork, wherein the cross pack assembly comprises a cross shaft and four shaft head units, each of the shaft head units comprises a bearing bush which is sleeved on the shaft head of the cross shaft and connected with the fork head hole of the flange fork or the welded fork in an outer circle mode, and a small gap is arranged between the bearing bush and the shaft head of the cross shaft in a radial direction. The novel joint assembly can improve the diameter specification of the cross shaft neck, greatly improve the transmission capacity, ensure the reliable lubrication of the transmission part, delay the wear of the cross shaft and the bearing bush, improve the transmission stability, prolong the service life, and further discloses a cross shaft type universal coupling comprising the joint assembly.

The utility model relates to the technical field of cross shafts, in particular to a shaft sleeve type cross shaft which comprises a cross shaft body, a connecting rod connected with the cross shaft body, a shaft sleeve connected with one end of the connecting rod, a cavity arranged inside the cross shaft body, an oil bin arranged inside the cavity, an extrusion plate arranged inside the oil bin, a guide rod connected with the extrusion plate, and a pressing plate connected with the guide rod. A sponge column is arranged in the oil bin, a fixing ring is arranged outside the guide rod, pressure springs are symmetrically arranged at the top of the fixing ring, a lever is arranged at the bottom of the extrusion rod, a hinge seat, a cavity and a connecting rod are arranged at the position, close to the center, of the lever, a channel is formed in the connecting rod in a penetrating mode, a baffle is arranged at one end of the lever, and a limiting plate is arranged on one side face of the baffle. By means of the structure of the guide rod, the extrusion rod, the lever, the hinge seat, the channel, the baffle, the limiting plate and the compression spring, the problems that the lubricating effect is not uniform enough and grease cannot be supplemented due to different flowing paths and speeds of the grease are solved.

The utility model relates to a crosshead and crankshaft connecting rod mounting structure for a slurry pump. The crosshead and crankshaft connecting rod mounting structure comprises a crosshead, a connecting head is formed at the left end of the crankshaft connecting rod; the connecting shaft comprises a front shaft body, a middle shaft body and a rear shaft body, the front shaft body is matched with the front pin hole, the rear shaft body is matched with the rear pin hole, the large-diameter end of the front shaft body is connected with the front end of the middle shaft body, and the rear end of the middle shaft body is connected with the small-diameter end of the rear shaft body; and the baffle is connected to the rear end of the crosshead, and the baffle limits the connecting shaft in the pin hole. The radial gap between the connecting shaft and the crosshead is reduced, abrasion between the connecting shaft and the crosshead is reduced, the installation precision is high, installation is rapid, the stability between the crosshead and the crankshaft connecting rod is improved, and the service life of the whole slurry pump is prolonged.

A pump power end includes an assembly comprising a crosshead, a connecting rod, and a joint. The joint may include a knuckle and a keeper. The connecting rod may include a forked end comprising two tines with a gap in the middle. The knuckle of the joint may be fixedly coupled to both tines. The crosshead may include a socket within which the knuckle of the joint is rotatably received. The keeper of the joint may include a body with a recess aligned with the socket to form a cavity within which the knuckle is disposed. The body of the keeper may be coupled to the crosshead and reside in the gap in the forked end of the connecting rod to retain the knuckle.

The utility model provides a vehicle differential spider which comprises a spider body, an extending shaft rod and a pressing oil outlet assembly, the spider body comprises a disc body and a plurality of shaft necks, the shaft necks are evenly distributed on the disc body, one end of the extending shaft rod is movably arranged in a containing groove formed in the shaft necks, and the extending shaft rod moves in the containing groove, so that the oil outlet assembly can be pressed on the spider body. The extension shaft rod is provided with a through groove, the pressing oil outlet assembly is provided with an extrusion part, the extrusion part is movably arranged in the through groove, and the shaft neck is provided with a liquid outlet hole communicated with the containing groove. According to the universal joint pin, oil liquid is extruded through the extrusion component, the oil liquid can overflow from the liquid outlet hole, so that the outer portion of the shaft neck is lubricated, the overall length of the shaft neck can be changed through cooperation of the extension shaft rod, and the problem that the universality is limited due to the fact that the size of an existing universal joint pin is fixed is solved.

A linear drive assembly configured for use within a power end assembly. The linear drive assembly is configured to interconnect a crankshaft and a pony rod and comprises a crosshead assembly attached to a connecting rod assembly. In one or more embodiments disclosed herein, the connecting rod assembly is configured to attach to opposite sides of the crosshead assembly so that no portion of the connecting rod assembly is disposed within an interior of a crosshead included in the crosshead assembly.

The invention originates from a universal joint bearing (10) comprising a trunnion (12), a cup (14) having an at least substantially cylindrical surface (22), a rolling element (16) rotatably supporting the cup relative to the trunnion, and at least one seal (18) sealing a space (20) between the trunnion and the cup, the at least substantially cylindrical surface is part of a radially outer surface (24) of the universal joint bearing, all rolling elements of which are arranged in a number of rows (26) of rolling elements. It is proposed that the quotient of the sum of the maximum axial lengths (28) of all the rows of rolling elements divided by the maximum axial length of the at least substantially cylindrical surface and the sum (30) of the maximum axial lengths of the total radially outer surface (32) of the at least one seal is between 0.6 and 0.75, the total radially outer surface of the at least one seal is part of the radially outer surface of the universal joint bearing.

The invention relates to a novel differential spider, which relates to the field of automobile parts, is mainly used for supporting a planetary gear, transmitting torque and realizing differential rotation of left and right wheels, and comprises a workpiece which comprises a main body part and a plurality of arc bosses, and the arc bosses are arranged on the main body part at intervals along the circumferential direction; the positioning tool comprises a plurality of V-shaped grooves, the V-shaped grooves are formed in the positioning tool at intervals in the circumferential direction, and the arc bosses abut against the corresponding V-shaped grooves for positioning; the V-shaped groove extrudes the arc boss, so that the positioning tool has a positioning effect on the workpiece, huge torque and vibration generated in the machining process can be effectively resisted, the workpiece is firmly fixed, and the core problems that the workpiece is prone to slipping and positioning is not firm due to insufficient meshing force are solved.

The utility model provides a wear-resistant differential spider. The wear-resistant differential spider comprises a spider body, the four rotating joints are rotationally arranged at the four end parts of the cross shaft body respectively; a sealing cover plate is embedded in the center of the top face of the cross shaft body, an assembling groove corresponding to the sealing cover plate is formed in the middle of the cross shaft body, a check valve with an exhaust switch is assembled in the assembling groove, a sliding assisting structure is arranged between the cross shaft body and the rotating connector, friction force is reduced, meanwhile, the cross shaft body is effectively prevented from being abraded, and the service life of the cross shaft is prolonged. A worker can input gas through a check valve with an exhaust switch, the gas enters an inflation cavity through a gas flow pipeline, an elastic positioning ring deforms under the action of gas pressure, the contact acting force of a rolling steel ball and an annular sliding assisting groove is improved, and therefore the rotation stability of the rotating connector is adjusted; exhaust and pressure reduction can be performed through an exhaust switch on the check valve, and the operation is simple.

The invention relates to the technical field of transmission systems, in particular to a differential assembly structure which comprises a shell, a cross shaft body and a locking assembly, and a cross shaft mounting hole is formed in the side portion of the shell in a penetrating mode; the cross shaft body is of a split type structure and comprises a long shaft and two short shafts, and the long shaft and the short shafts are installed in the shell through the cross shaft installation holes and pressed and fixed to the shell through the locking assemblies to form an integrated cross shaft structure. After the locking assembly is unlocked, the long shaft or any short shaft can be independently pulled out of the cross shaft mounting hole in the axial direction of the long shaft or any short shaft. A traditional non-detachable integral type universal joint pin is improved into a split type universal joint pin structure capable of being independently detached, so that when the universal joint pin breaks down, independent replacement and maintenance of a long shaft or a short shaft can be achieved without detaching a left shell and a right shell of the differential mechanism, convenience and efficiency of maintenance operation are remarkably improved, and the service life of the differential mechanism is prolonged. The problem that an existing differential assembly structure is low in maintenance efficiency is solved.

The utility model relates to the technical field of connection of piston rods and crossheads, and particularly discloses a connection structure of a piston rod and a crosshead body, which comprises a crosshead body, a piston rod body is arranged at the upper end of the crosshead body, a positioning bolt is fixedly connected to the lower surface of the piston rod body, a groove is arranged on the upper surface of the crosshead body, and the positioning bolt is fixedly connected with the positioning bolt. And a limiting clamping block is mounted on the inner wall of the groove of the crosshead body. According to the connecting structure of the piston rod and the crosshead body, the extrusion clamping block and the first locking block are arranged, the crosshead body and the piston rod body are fixed through the positioning bolt, and meanwhile the positioning bolt and the limiting clamping block are fixed in a threaded mode, so that the piston rod body drives the extrusion clamping block to be clamped into an annular groove in the upper surface of the limiting clamping block; and a linkage sliding block is conveniently pushed by extruding a clamping block, then the linkage sliding block drives a first locking block to horizontally slide, the first locking block is clamped in a first limiting groove so as to fix a limiting clamping block and the crosshead body, and the stability of the device is improved.

The utility model relates to the technical field of oil cylinder machining, in particular to a guiding telescopic oil cylinder which comprises a cylinder body and is characterized in that the cylinder body comprises a telescopic end, the outer side of the cylinder body is connected with the telescopic end, the top end of the telescopic end is connected with a universal coupling, the annular side face of the telescopic end is connected with a sleeve block, and the bottom end of the sleeve block is connected with a linkage frame. The side face of the linkage frame is connected with a side sliding strip, one side of the side sliding strip is connected with a side sliding groove, and the side sliding groove is connected to the inner side face of the sleeve body. The coupler connected with the telescopic end of the cylinder body facilitates connection of the cylinder body and object connecting ends at different angles, the linkage frame guides the telescopic end and enhances the telescopic stability of the cylinder body, the motor is started to drive the screw to rotate, so that the side sliding block is driven to move on the thread side, and the clamping ring moves to drive the fastening arc to move so as to clamp the bottom of the cylinder body; and the cylinder body and the fixed seat can be conveniently connected and detached.

A linear drive assembly configured for use within a power end assembly. The linear drive assembly is configured to interconnect a crankshaft and a pony rod and comprises a crosshead assembly attached to a connecting rod assembly. In one or more embodiments disclosed herein, the connecting rod assembly is configured to attach to opposite sides of the crosshead assembly so that no portion of the connecting rod assembly is disposed within an interior of a crosshead included in the crosshead assembly.

A pair of wear grooves for a linear drive assembly. One wear groove is disposed on a wear plate attached to a crosshead. This wear groove is on a front edge of the wear plate, and does not intersect any lubrication groove. Another wear groove is disposed circumferentially about an inner wall of a crosshead guide. Each of the wear grooves is observable to an operator without fully disassembling the crosshead and the crosshead guide, and each is observable from a single side of the crosshead guide. Should the wear groove not be observable, the associated component should be replaced. Should the wear groove be observable, the remaining life of the component can be determined from the groove's depth.

The utility model relates to the technical field of bearings, in particular to a special long-life bearing which comprises a shaft body, a shaft head and a shaft sleeve, the shaft head is fixedly connected to the outer side of the shaft body, an annular plate is fixedly connected to the outer side of the shaft head, a sliding ring is slidably connected to the inner side of the annular plate, an elastic rubber ring is fixedly connected to the inner side of the sliding ring, and the shaft sleeve is slidably connected to the outer side of the shaft head. A retainer is arranged on the inner side of the shaft sleeve, a roller pin is rotatably arranged on the inner side of the retainer, a fixing cylinder is fixedly connected to the end, close to the shaft body, of the shaft sleeve, a clamping groove is formed in the inner side of the fixing cylinder, a clamping spring is connected to the inner side of the clamping groove in a clamped mode, and the end, close to the shaft sleeve, of the clamping spring is tightly attached to the telescopic spring. By arranging the annular plate, the sliding ring, the elastic rubber ring, the fixing cylinder, the clamping groove, the clamping spring, the telescopic spring, the carbon semi-ring and the elastic rope, impurity particles are prevented from entering the connecting opening position of the shaft sleeve and the shaft head of the crosshead bearing, the sliding smoothness of a roller pin on the inner side of the shaft sleeve and the surface of the shaft head is guaranteed, and the service life of the bearing is guaranteed.

The invention relates to a differential planetary gear shaft, a cross shaft and a planetary gear differential mechanism. The differential planetary gear shaft comprises a shaft body, a mounting groove is formed in the outer wall of the shaft body, the mounting groove extends by a circle in the circumferential direction of the shaft body, the shaft body is sleeved with a bearing, the bearing is embedded in the mounting groove, and the shaft body is suitable for being connected with a planetary gear through the bearing. According to the differential mechanism, the mounting grooves are formed in the shaft body, the bearings are mounted in the mounting grooves, when the planetary gears are mounted on the shaft body, rotating connection is formed between the bearings, friction force is converted into rolling friction through the bearings, and therefore the friction force is effectively reduced, and the running resistance of the differential mechanism is reduced; and the axial positioning of the bearing and the planetary gear is realized.

The utility model relates to the technical field of petroleum and natural gas drilling equipment and engineering, and particularly discloses a reinforced connecting rod crosshead structure for a fracturing pump, which comprises a connecting rod, a crosshead, a connecting rod pin and a connecting rod seat, the connecting rod small head is fixedly connected with the connecting rod pin through a fastener, a cavity is formed between the connecting rod small head and the connecting rod pin, a positioning pin is arranged in the cavity, the connecting rod small head is in an arc shape, a lining is fixedly arranged in the crosshead, the lining is arranged on the outer side of the connecting rod pin in a sleeving mode, and the connecting rod pin can rotate relative to the lining. The connecting rod pin replaces a traditional connecting rod small head to rotate in the crosshead so as to bear the pressure of the plunger, the connecting rod pin and the connecting rod pin bush have a larger contact area, and therefore the contact pressure is reduced, the connecting rod small head is in an arc shape, the machining requirement for high coaxiality does not exist, and the machining difficulty and the machining cost are reduced.

The utility model discloses a crosshead structure and a fracturing pump, and relates to the field of oil and gas equipment. A crosshead structure of a fracturing pump comprises a crosshead main body, the crosshead main body comprises a first arc, a second arc, a third arc and a fourth arc, and the first arc, the second arc, the third arc and the fourth arc are sequentially arranged in the circumferential direction of the crosshead structure and define a multi-arc profile of the crosshead main body in the radial direction; the circle center of the first arc and the circle center of the third arc coincide at a first point, the distance from the first point to each point on the first arc is a first distance, the minimum distance from the first point to each point on the second arc is a second distance, and the distance from the first point to each point on the third arc is a third distance; the minimum distance from the first point to each point on the fourth arc is a fourth distance; the first distance is larger than the third distance, and the second distance is equal to the fourth distance and smaller than the third distance. The problem that the contact area of the crosshead and the sliding sleeve is prone to ablation can be solved.

The invention relates to a universal joint bearing (10) comprising a journal (12), a cup (14), rolling elements (16) that support the cup rotatably relative to the journal, and at least one seal (18) that seals a space (20) between the journal and the cup. The cup has an at least substantially cylindrical surface (22) that is part of a radially outer surface (24) of the universal joint bearing, with all rolling elements of the universal joint bearing being arranged in a specific number of rows (26) of rolling elements. It is proposed that a sum of the maximum axial lengths (28) of all rolling element rows divided by the sum (30) of the maximum axial length of the at least substantially cylindrical surface and the maximum axial length of the entire radially outer surface (32) of the at least one seal, which is part of the radially outer surface of the universal joint bearing, be between 0.6 and 0.75.

The invention discloses a heavy-duty car differential planet wheel set without a copper bush and a preparation method, the heavy-duty car differential planet wheel set without the copper bush comprises a cross shaft and a planet wheel, the cross shaft is in interference fit with an inner hole of the planet wheel, a spiral micro-oil groove is formed in the surface of the inner hole of the planet wheel, lubricating grease is arranged in the spiral micro-oil groove, and a step plating layer is arranged on the surface of the cross shaft. The manufacturing method comprises the following steps: S1, preparing the stepped plating layer of the cross shaft; s2, planet wheel inner hole machining; and S3, assembling the assembly. After the use of a copper sleeve is reduced, the use cost is reduced, the risk of heavy metal pollution is also reduced, the continuous oil supply capacity of the spiral micro-oil groove enables the thickness of a lubricating film to be stable, lubrication failure caused by local high temperature is avoided, the wear resistance of the cross shaft is improved through a stepped plating layer on the cross shaft, the stability of the device in the working process is guaranteed, and the service life of the device is prolonged. And the service life of the cross shaft is prolonged.

An internal combustion engine has a uniblock that defines a blind cylinder bore that terminates within the uniblock. A piston is inserted into the cylinder bore from a bottom end of the cylinder bore. Parallel first and second vertical planes extend along first and second lateral sides of the cylinder bore. A cylinder zone being defined between the first and second vertical planes. A crosshead is coupled to the piston. A first crankshaft has a first crankshaft axis that extends parallel to the first vertical plane and that is positioned outside of the cylinder zone. A second crankshaft has a second crankshaft axis that extends parallel to the second vertical plane and that is positioned outside of the cylinder zone. The first crankshaft is coupled to the crosshead with a first connecting rod and the second crankshaft is coupled to the crosshead with a second connecting rod.