92 results about "Crosshead" patented technology

The application provides a cast power end frame including a pair of end plates and an outer casing extending between the end plates and defining an interior therein; a crank shaft housing extending between the end plates and within the interior of the outer casing, and a plurality of crosshead tubes, each crosshead tube extending substantially perpendicular to the crank shaft housing, wherein the outer casing, crank shaft housing, and crosshead tubes are cast as a single part comprising steel comprising a carbon constituent of 0.06%-1.99% carbon.

The invention discloses a single-cylinder crankshaft upper crank contour optimization composition method which comprises the following steps: firstly, analyzing a single-cylinder inner crank-connecting rod-crosshead motion rule, and finding out a corresponding relation between each motion parameter and a crank contour; the crank, the connecting rod and the crosshead are integrally and reversely rotated, and point location data of the rotating center of the connecting rod and the crosshead are obtained; setting a safety interval and a vertical line to obtain point position data of an intersection point of the crosshead movement line and the crank contour limiting line and tangent point data of the crank contour limiting line on the crank contour; repeating the operation according to the adjusted angle value to obtain a plurality of groups of tangent point data; fitting and processing the multiple groups of tangent point data to obtain a first group of crank limit profile curves and a second group of crank limit profile curves, shifting the outer circle of the crank pin to obtain an auxiliary profile, and connecting the three to obtain a crank profile. According to the method, the contour of the crank can be designed to the maximum extent, the balance performance of the crank is effectively improved, and the application applicability of the crankshaft is enhanced.

The invention discloses a high-power seven-cylinder fracturing pump shell and a fracturing pump in the technical field of fracturing pumps, and aims to solve the problems that in the prior art, the requirements of high pressure and large displacement of a construction site are difficult to meet, and the stability of the whole structure of the fracturing pump is poor. The pump shell comprises a pump shell body, the pump shell body comprises two side bearing seats, the side walls of the two side bearing seats are provided with the same upper arc plate and the same lower arc plate, and a rearview hole cover plate and a connecting rod crosshead box body are arranged between the upper arc plate and the lower arc plate; according to the seven-cylinder fracturing pump shell structure type, under the same rotating speed and stroke working conditions, compared with a five-cylinder fracturing pump, the seven-cylinder fracturing pump is higher in displacement, larger in pressure and lower in discharge pulsation, and the requirements for large displacement and high pressure of a well site can be better met; and meanwhile, through cooperation of the multiple reinforcing rib plates, the stability of the overall structure of the device is ensured, and the using effect of the device is ensured.

A liquid nitrogen pump power end assembly relates to the technical field of liquid nitrogen pumps and comprises a crankshaft box body, a crankshaft, a connecting rod and a crosshead assembly. A plurality of wallboards are arranged in the crankshaft box body, crankshaft bearing seats are mounted on the wallboards, a plurality of reinforcing ribs are fixedly arranged between the crankshaft bearing seats and the wallboards, and the crankshaft is rotationally mounted in the crankshaft bearing seats through crankshaft bearings; the crankshaft comprises a straight shaft and an eccentric wheel, the straight shaft penetrates through the crankshaft bearing seat, and the eccentric wheel is mounted on the straight shaft and connected with the connecting rod; the crosshead assembly comprises a crosshead, the inner end of the crosshead is connected with the connecting rod, the outer end of the crosshead is arranged as a mounting end, and a clamping assembly is mounted at the mounting end; the clamping assembly comprises two oppositely-arranged clamping hook pieces, and the distance between the two clamping hook pieces is adjustable in the radial direction of the installation end. The mechanical strength of the crankcase body can be improved, and the gradually-increased operation pressure in China can be met; and the device can be connected with fluid ends of various models, and the installation application range is expanded.

This reciprocating compressor comprises: a crankshaft; a crosshead part that is connected to the crankshaft; a cross guide part that accommodates the crosshead part; and a compression part that is placed on the cross guide part. The cross guide part includes: a plurality of column parts each continuing from the lower end to the upper end of the cross guide part on one outer wall of wall parts constituting the cross guide part; and one or more recessed shape parts formed in a recessed shape so as to be thinner than the plurality of column parts between the plurality of column parts in a first direction in which the crankshaft extends.

The utility model relates to an adjusting and positioning device for machining a crosshead pin of a variable compression ratio part. Comprising a basic positioning mechanism arranged on a working table of a vertical turning and milling machine tool of the machine tool, a V-shaped base used for placing the crosshead pin, an adjustable supporting mechanism used for axially positioning the crosshead pin, and a pressing mechanism used for pressing the V-shaped base and the crosshead pin. All positioning and clamping precision of the crosshead pin before finish machining can be effectively controlled during operation, correction and adjustment are convenient and efficient, the surface of the crosshead pin is effectively protected, and it is ensured that all procedures are finished through one-time clamping station finish machining of all profiles of a piston hole of the crosshead pin on a vertical turn-milling machine tool.

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.

A batch drum furnace with a dual cylinder is provided. In one embodiment, a batch drum furnace configured to heat a hot melt adhesive material includes a platen assembly configured to be movable from a raised position to a lowered position; a horizontal crosshead member which is suspended on the horizontal crosshead member; and a dual pneumatic piston assembly configured to move the platen assembly from the raised position to the lowered position. The pneumatic piston assembly includes a first pair of pneumatic pistons disposed on a first side of the drum furnace and a second pair of pneumatic pistons disposed on a second side of the drum furnace, and each pair of pneumatic pistons includes a first piston rod and a second piston rod, each piston rod having an upper end. In one embodiment, the upper end of the first piston rod is connected to the upper end of the second piston rod through first and second top connecting plates; and wherein the first and second top connecting plates are connected to opposite ends of the horizontal crosshead member by elongated crosshead struts.

The utility model relates to the technical field of plunger pumps, and discloses a fracturing plunger pump, a power end assembly of the fracturing plunger pump comprises a power end shell, a connecting rod body crosshead assembly and a crankshaft assembly, one side of the connecting rod body crosshead assembly is connected with a crankshaft of the crankshaft assembly, and the other side of the connecting rod body crosshead assembly is installed in a crosshead cavity of the power end shell; the power end shell comprises a plurality of crosshead cylinder sleeves, a plurality of crankshaft bearing pedestals and a plurality of vertical plates, the crankshaft bearing pedestals are installed on the vertical plates in a one-to-one correspondence mode, and a first containing cavity used for containing a crank throw of a crankshaft is formed between every two adjacent crankshaft bearing pedestals. A second containing cavity used for containing the crosshead cylinder sleeves is formed between every two adjacent vertical plates, each crosshead cylinder sleeve is provided with a crosshead cavity, and the crosshead cavities communicate with the first containing cavities. The reliability of the plunger pump can be improved through the vertical plates of the power end shell, the plunger pump is simple, reasonable and compact in overall structure, and light weight of the plunger pump is achieved.

A pump assembly may include a bearing housing having a bore. The pump assembly may include a connecting rod connected to the bearing housing at a first end of the connecting rod and connected to a crosshead at a second end of the connecting rod via a wrist pin. The connecting rod may include a lubrication channel that extends within the connecting rod. The pump assembly may include a shell bearing in the bore of the bearing housing, the shell bearing having an inner surface and an outer surface. A portion of the inner surface of the shell bearing that contacts the crankshaft in a forward stroke of the crosshead may be uninterrupted by a groove or an aperture configured to direct lubrication fluid to the lubrication channel of the connecting rod.

This application discloses a detection method and a detection device, relating to the field of reciprocating motion equipment. The detection method is applied to a plunger pump, the plunger pump including a detection device for detecting at least one of the temperature of certain components in the plunger pump and the lubricating oil pressure of the plunger pump. The detection method includes: detecting whether the plunger pump is in a working state; when the plunger pump is in a working state, the detection device switches to a temperature detection mode or a lubrication detection mode; when the plunger pump is not in a working state, the detection device switches to a sleep mode. This application can solve problems such as bearing failure caused by untimely temperature detection of the crosshead.

A preload bolt assembly for connecting at least two engine components of a large turbocharged two-stroke uniflow crosshead internal combustion engine is disclosed. [Solution] A preload bolt assembly for connecting at least two engine components (22, 23) of a large turbocharged two-stroke uniflow crosshead internal combustion engine comprises a tie rod (40) and a nut (42), the two engine components being connected by the tie rod and nut, with one end of the tie rod passing through a mounting hole (41) of the engine component and the nut screwed into the threads of the end. This preload bolt assembly is characterized by comprising a braking means disposed on the outer circumference of the tie rod to prevent the tie rod from moving through the mounting hole in the event of failure of the tie rod.

This invention provides a method for purging the fuel system of a large turbocharged two-stroke dual-fuel uniflow crosshead internal combustion engine. [Solution] The second fuel system comprises a second fuel tank, a second fuel supply line for supplying pressurized second fuel to a fuel valve, and a second fuel return line for returning pressurized second fuel from the fuel valve. The engine has a purge gas system for purging the second fuel from the fuel valve, the second fuel supply line, and the second fuel return line to a drain tank, wherein the method is characterized in that, after the purge is stopped, a space including at least a portion of the fuel valve and the second fuel supply and return line is isolated from the rest of the second fuel system by closing a plurality of valves, the internal pressure and temperature of the space are measured and used to determine whether the internal pressure of the space corresponds to the saturation pressure on the pressure / temperature saturation curve of the second fuel, and if the pressure in the space corresponds to the saturation pressure, the purge is continued.

A shaft generator system for use with a two-stroke uniflow scavenged crosshead type internal combustion engine is disclosed. The shaft generator system comprises a shaft generator, a first circuit for converting AC current from a first frequency to a second frequency, and a shaft generator control system configured to receive a first signal indicative of power consumption. The shaft generator control system is operatively connected to the shaft generator and configured to control power generation of the shaft generator based on the first signal. The shaft generator control system is configured to allow the power consumption to be different from the power generation for a first period of time of at least 2 seconds.

A mold closing device (16) of an injection molding machine (10) is provided with a ball screw (26e) that is rotated by a motor (26a), a cross head (28) that is disposed between a rear platen (22) and a movable platen (24) and is moved in an axial direction of a connecting rod (34) by rotation of the ball screw, a toggle link (30) that moves the movable platen in the axial direction in accordance with movement of the cross head, and a cross head pressing mechanism (PM) that presses the cross head in a manner that the cross head is moved toward the rear platen side.

The invention discloses a crosshead of a flexible injection molding machine, and belongs to the technical field of crossheads of flexible injection molding machines. The device comprises a crosshead body, sliding arms are symmetrically arranged on the crosshead body up and down, sliding holes in sliding fit with guide sliding rails are formed in the ends of the sliding arms, hinge arms are arranged on the two sides of the crosshead body, and hinge holes used for being hinged to hinge frames in a penetrating and inserting mode are formed in the ends of the hinge arms. The device further comprises an oil injection mechanism, the oil injection mechanism comprises oil injection grooves extending to the inner side of the crosshead body, each sliding hole and each hinge hole are correspondingly communicated with one oil injection groove, and the oil injection grooves are communicated with the oil injection grooves. The oil injection groove is used for regularly injecting oil into the sliding hole and the hinge hole in a high-temperature environment. In the high-temperature environment, oil can be regularly and automatically supplied to the sliding hole and the hinge hole through the structure, abrasion is effectively reduced, and the equipment failure rate is reduced.

The utility model relates to steel pipe processing technical field, and disclose a kind of socket steel pipe processing device, including base, still including the fixed piece for being used to fix steel pipe, two groups of first air cylinder being installed in base top, baffle being fixed in the piston rod of first air cylinder, the expanding die of being carried out to steel pipe Expansion, the recess of being convenient for the movement of expanding die, support seat being fixed in the one side of base, and the pressure groove assembly of being carried out to steel pipe Pressure groove, solve the current domestic production socket steel pipe generally with the method of cold expanding while expanding groove processing, two equipment crosshead arrangement, one equipment is used for socket end bulging expansion, one equipment is used for socket end bulging expansion and pressure groove, but prone to steel pipe expansion crack, affect yield and product quality, equipment occupies too large space, and when expanding to steel pipe, unable to fix the limit position of steel pipe, the stability of steel pipe is poor, affect steel pipe forming effect problem.

A dual fuel system for a large two-stroke turbocharged uniflow internal combustion crosshead engine capable of operating with a first fuel and a second, different fuel, the first fuel being fuel oil, the second fuel being fuel oil, the first fuel being fuel oil, the second fuel being fuel oil, the second fuel being fuel oil, the first fuel being fuel oil, and the second fuel being fuel oil, and a marine vessel having the same, and a method of operating the engine are disclosed. The second fuel is a liquid fuel. The dual fuel system includes: a first fuel system for supplying a first fuel; a second fuel system (30) for supplying a second fuel; a purge system for discharging a second fuel; and the bypass system is used for ensuring that the second fuel from the second fuel system is completely discharged during purging.

The utility model provides a fixing clamp for crosshead machining, which relates to the technical field of clamp structures and comprises a clamp seat, the cross section of the clamp seat is in a shape of a Chinese character'ao ', a clamping groove is formed at the top end of the clamp seat, lifting grooves are arranged on protrusions on two sides of the top end, and lifting seats are arranged in the lifting grooves. Positively and negatively rotating the first adjusting knob to drive the lifting seat to ascend / descend; the two second adjusting knobs are rotated positively and negatively to drive the upper clamping frame to get close to or get away from each other; the third adjusting knob is rotated positively and negatively to drive the lower clamping frame to approach the other end of the clamping groove; and through the design of the lifting seat, the upper clamping frame and the lower clamping frame, the device can adapt to crosshead bodies with different heights, it is ensured that the upper side and the lower side of the shaft hole can be adaptively fixed, the shaft hole cannot be interfered in the fixing process, and then the stability in the machining process is improved.

The utility model discloses a self-positioning type driving screw driver matched with a screw rod. The screw rod is provided with an end, and a cross hole is formed in the end; the driving screwdriver is provided with a handle, a driving rod and a crosshead which is arranged at the end part of the driving rod and can be positioned and embedded into the cross hole, a positioning component which is connected with the end head and drives the end head to be coaxial with the crosshead is arranged on the driving rod, and the positioning component can axially move relative to the crosshead. The positioning component is a positioning cylinder which is axially and slidably arranged on the driving rod in a sleeving mode and wraps the crosshead in the annular direction, the end can be axially embedded into the positioning cylinder, and the side wall of the end is close to the inner wall of the positioning cylinder. The screw rod and the driving screw driver can be driven to be connected and coaxial through the positioning component, then the screw rod can be driven to be aligned with the threaded hole through the driving screw driver, and the problem that at present, manual supporting is needed is solved. And due to the moving structure of the positioning component, the positioning component can axially move on the driving rod and is separated from the crosshead and the end head of the screw rod, so that the screw rod is completely fastened.

The application discloses an indoor temperature control vane shear apparatus, and relates to the technical field of soil testing, which comprises a sample cylinder with two open ends, wherein the sample cylinder is vertically placed, an insulating cylinder is sleeved outside the sample cylinder, and a drainage device is arranged at the lower end of the sample cylinder; a heating device is arranged at each end of the sample cylinder; a loading device is arranged above the sample cylinder to apply axial load to the soil sample in the sample cylinder; a testing assembly comprises a driving device and a vane, wherein the driving device is arranged above the sample cylinder, the vane is parallel to the axis of the sample cylinder, the vane is in transmission connection with the driving device to drive the vane to extend into the sample cylinder along the axial direction of the sample cylinder, and the driving device can also drive the vane to rotate around the axis. The indoor temperature control vane shear apparatus can determine the undrained shear strength and residual strength of the same soil sample under multiple different temperature conditions at a specified pressure in one test process, and greatly shortens the test period.

The utility model discloses a kind of power output structures of double-cylinder double-acting diaphragm pump, to provide a kind of double-cylinder double-acting diaphragm pump power output structure with stable reliable power transmission performance, it is convenient to maintain and can adapt to various working conditions, its technical scheme main point is including the mounting bracket for supporting overall structure, two symmetrical liquid end and the driving mechanism for providing power for liquid end are equipped on the mounting bracket, the driving mechanism includes motor and the transmission component for transmission power, the transmission component includes worm gear, the box body between motor and transmission component is arranged and the double eccentric shaft, crank, connecting rod and crosshead that are sequentially transmission connection are arranged in box body, the motor is connected with double eccentric shaft to form rotary motion after worm gear deceleration, and reciprocating motion is formed by crosshead by crank and connecting rod conversion again.The utility model is applicable to diaphragm pump technical field.

The application discloses a locking and anti-loosening structure of a cross head and a locking piston rod, and aims to solve the inconvenience of anti-loosening operation between a locking piston rod and a locking nut. The locking piston rod is connected with the locking nut, the locking piston rod and the locking nut are connected with a rotatable anti-loosening block at corresponding positions, and the anti-loosening block extends out of the outer wall of the locking piston rod at the bottom end; during the process of screwing the locking nut to the locking piston rod, the locking nut is pushed to the bottom end of the anti-loosening block to make the anti-loosening block deflect, and then the top end of the anti-loosening block is abutted to the inner wall of the locking nut to realize anti-loosening. The whole anti-loosening operation process does not exist the operation of drilling a hole for a split screw, has no requirement on the space between a movable die plate and a rear die plate, can conveniently realize the anti-loosening operation between the locking piston rod and the locking nut, and has good anti-loosening effect.

An injection molding apparatus includes an injection unit, a mold clamping unit, and a controller. The mold clamping unit includes a toggle fixing portion, a fixed mold attachment portion, a movable mold attachment portion, a motor, a ball screw, a crosshead, and a toggle section configured to move the movable mold attachment portion along a mold clamping direction. The toggle section includes a first member associated with a first rotary shaft, a second member associated with a second rotary shaft and a third rotary shaft, and a third member associated with a fourth rotary shaft. A length of a line connecting a center of the first rotary shaft and a center of the second rotary shaft is equal to or longer than a length of a line connecting a center of the second rotary shaft and a center of the third rotary shaft.

The application relates to the field of mechanical transmission and lubrication, and discloses a crankshaft connecting rod positioning structure and a compressor. The crankshaft connecting rod positioning structure comprises a crankshaft, a connecting rod and a crosshead, the three components are matched to form a motion constraint structure, and the structure is further provided with a crankcase, a flywheel, an oil pump and other components, has a lubricating system, and can adjust an assembly gap and form an axial positioning gap, some components are made of special wear-resistant materials, and the structure further comprises a piston rod assembly connected with the crosshead and the like. The application has the technical effects of optimizing the positioning of the crankshaft connecting rod, realizing good motion constraint, guaranteeing the lubricating effect of the components, facilitating the adjustment of the gap, prolonging the service life of the components, and ensuring the stable operation of the compressor.

The invention provides an injection molding device and a mold clamping device. The injection molding apparatus includes an injection unit, a mold clamping unit, and a control unit. The mold clamping unit is provided with a toggle fixing part, a fixed mold mounting part, a movable mold mounting part, a motor, a ball screw, a crosshead, and a toggle part which is connected with the toggle fixing part, the movable mold mounting part and the crosshead and enables the movable mold mounting part to move along the mold clamping direction through the movement of the crosshead. The toggle fixing part is connected with the toggle fixing part through a first rotating shaft; a second member connected to the first member via a second rotation shaft and connected to the movable mold mounting portion via a third rotation shaft; and a third member connected to the crosshead and connected to the first member via a fourth rotation shaft, the length of a line connecting the center of the first rotation shaft and the center of the second rotation shaft in the first member being greater than the length of a line connecting the center of the second rotation shaft and the center of the third rotation shaft in the second member.

The present application relates to the technical field of oil and gas extraction, and discloses a plunger pump. The plunger pump comprises a pull rod, a crosshead, a bearing shell, a connecting rod, and a measurement member. One end of the pull rod is fixedly connected to the crosshead, the other end of the crosshead is connected to the connecting rod, and the bearing shell is disposed between the crosshead and the connecting rod. The crosshead is provided with a measurement hole, and one end of the measurement hole extends to an end face of one end of the crosshead facing the bearing shell. The measurement member measures the temperature of the bearing shell by means of the measurement hole.

The invention provides a multi-plunger reciprocating pump with a multi-fulcrum driving shaft, which is characterized by comprising a driving shaft, an eccentric wheel, a supporting wheel, a connecting rod, a crosshead, plungers, a crosshead pin, an eccentric wheel bearing, a supporting wheel bearing, a bearing box, a plunger main seal, a pump head, an inlet one-way valve, an outlet one-way valve, a pump head cavity, a pump inlet and a pump outlet, wherein the eccentric wheels and the supporting wheels are sequentially and alternately arranged on the driving shaft, the two sides of each eccentric wheel are each provided with one supporting wheel, each eccentric wheel is not concentric with the driving shaft, and each supporting wheel is concentric with the driving shaft. According to the multi-plunger reciprocating pump with the multi-fulcrum driving shaft, the rigidity of the driving shaft cannot be reduced along with increase of the number of the plungers, the driving shaft is easy to machine, and when secondary sealing is adopted for plunger padding, the leakage state of primary sealing can be detected.

A power end assembly includes a crankshaft section, a crosshead section, and a connector section coupled together by one, two, or more sets of stay rods. The power end may include one or more support plates that are coupled to the crankshaft section and / or crosshead section. The crosshead section includes a plurality of individual crosshead frames. The connector section may include a plurality of individual connector plates or may be a unitary connector plate. The power end is configured to be coupled to a fluid end assembly by coupling the fluid end assembly to the connector plates.

The present application relates to the technical field of reciprocating plunger pumps, and discloses an opposed-type reciprocating pump. The opposed-type reciprocating pump comprises a transmission end and hydraulic ends disposed on the left and right sides of the transmission end. The transmission end comprises a body, a crankshaft, connecting rods, and crossheads. The crankshaft, the connecting rods, and the crossheads are mounted on the body. The crankshaft comprises a plurality of crank throws. Two connecting rods are mounted on each crank throw. The two connecting rods respectively extend along the left and right sides of the crankshaft and are connected to the crossheads located on the left and right sides of the crankshaft. The crossheads are connected to plungers corresponding to the hydraulic ends. The overall structure of the present application is more reasonable and compact, the crankshaft has good rigidity, and a lubrication system is simple, thereby providing a high-pressure, high-flow reciprocating pump having low cost, high reliability, and high maintainability.