143 results about "Crosshead" patented technology

The reciprocating compressor comprises a compressor frame, a crankshaft and a connecting rod, connecting the crankshaft to a crosshead. A piston rod connects a piston to the crosshead. The piston reciprocates in a gas compression cylinder. At least one pressure-drop module is positioned between the gas compression cylinder and a crosspiece guide. The piston rod extends from the gas compression cylinder through a pressure-drop chamber of the pressure-drop module. Also disclosed herein is a method of operating a reciprocating compressor.

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 utility model discloses a plunger pump, and belongs to the technical field of oil and gas exploitation, the plunger pump comprises a pull rod, a crosshead, a bearing bush, a connecting rod and a detection piece, one end of the pull rod is fixedly connected with the crosshead, the other end of the crosshead is connected with the connecting rod, and the bearing bush is arranged between the crosshead and the connecting rod; the crosshead is provided with a detection hole, one end of the detection hole extends to the end face of one end, facing the bearing bush, of the crosshead, and the detection piece detects the temperature of the bearing bush through the detection hole. According to the plunger pump, whether the bearing bush of the crosshead is burnt or not can be determined by detecting the working temperature of the bearing bush of the crosshead in the plunger pump, so that a new bearing bush can be replaced in time, the plunger pump can be prevented from being greatly damaged, and it is guaranteed that normal operation can be conducted stably.

The present invention provides an electromagnetic compressor, including a compressor cylinder body, with dead center coils designed at both ends of the compressor cylinder body, and the electromagnetic directions of the coils are opposite to each other with the same poles in the compressor cylinder body after power is applied; a piston coil is provided between the two sets of dead center coils, and the positive and negative poles of the piston coils are electrically connected to the commutator through a guide rod. After the guide rod is connected to the commutator, the piston coil is urged to approach the dead center coil on the opposite side. During the movement of the commutator and the piston head, the position of the guide rod relative to the commutator will change relative to each other, thereby changing the connection direction of the positive and negative poles of the piston coil. The present invention designs a piston compressor based on the principle of electromagnetic induction, and utilizes the same magnetic poles generated at both ends of the cylinder body to make the piston continuously change the magnetic poles at both ends and reciprocate in the cylinder body. The present invention eliminates the crankshaft, crosshead, coupling, motor transmission mechanism, etc. in the traditional piston compressor, and has a simple structure.

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 utility model discloses a combined compressor which comprises a motor and further comprises a first-stage compressor body, a second-stage compressor body, a third-stage compressor body, a fourth-stage compressor body, a compressor body, a middle body, a compressor body, a connecting rod, a crosshead, a piston rod, a connecting cylinder, a pressure body B and a pressure body C. The power output end of the motor is provided with the first-stage compressor body, the second-stage compressor body, the third-stage compressor body and the fourth-stage compressor body through the compressor bodies. The machine body is composed of a middle body and a machine body, the device is of an eight-column eight-stage counter-dynamic balance type, air cylinder water cooling, pressure circulating lubrication and motor dragging, all columns of air cylinders are horizontally arranged and distributed on the two sides of a crankshaft, the device has the advantages of being good in dynamic balance performance, convenient to operate and overhaul and the like, the motor is of a dual-drive structure, four columns of compressor units are arranged on each side of the motor, the overall structure is optimized, and the service life is prolonged. The staggered angles of the cranks among the rows are reasonably arranged, the inherent frequency of a shaft system is changed, the torsional vibration of the shaft system can be effectively reduced, the jumping problem of the crankshaft is greatly relieved, and therefore vibration and noise of a unit are greatly reduced.

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 utility model discloses a cooling device for a ball screw of an all-electric injection molding machine, which comprises the ball screw, one end of the ball screw is in threaded connection with a ball nut, the outer part of the ball nut is connected with a crosshead thrust seat, the middle part of the crosshead thrust seat is provided with a flow guide assembly, one side of the crosshead thrust seat is provided with a cooling assembly, and the other side of the crosshead thrust seat is provided with a water inlet and a water outlet. The output end of the cooling assembly is communicated with the flow guide assembly through a pipeline, after gas filtered by the gas source is treated by the vortex cooler, cooling gas is conveyed into the crosshead thrust seat through cooperation of a gas pipe and a gas pipe connector, a closed cavity formed by combining the crosshead thrust seat and the ball nut is filled with the cooling gas, and the crosshead thrust seat and the ball nut are sealed. The surface of the outer body of the ball nut is coated with the cooling gas, and the cooling gas with heat of the ball nut is exhausted through the exhaust pipeline and the silencer at the lower part of the crosshead thrust seat, so that the heat of the ball nut is taken away through continuous flowing of the cooling gas, the heat dissipation effect of the ball nut is improved, and the mold closing rate of the injection molding machine is increased.

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.

The utility model relates to a mud pump crosshead upper and lower guide plate centering detection tool comprising a piston rod, the front end of the piston rod is provided with a piston installation segment, and the piston installation segment comprises a polished rod segment and a threaded segment; the mounting seat is arranged on the piston mounting section, and the mounting seat is rotationally arranged on the piston mounting section; the rear end of the bridge plate is fixedly connected with the mounting seat, and the bridge plate is parallel to the piston rod; one end of the sliding seat is connected with the bridge plates, and the bridge plates are in sliding fit with each other; and the dial indicator is installed on the sliding block, and the dial indicator is perpendicular to the bridge plate. The mud pump crosshead upper and lower guide plate centering gauge is simple in structure and low in manufacturing difficulty, can be quickly installed at the front end of a piston rod, and accurately measures the position accuracy of the piston rod in a reference hole.

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 split-type plunger pump includes: a first module including a reduction gearbox assembly, an input side interface thereof being connected to a power source; a second module including a crankcase assembly, an input side interface thereof being connected to an output side interface of the first module; a third module including a crosshead box assembly, an input side interface thereof being connected to an output side interface of the second module; and a fourth module including a fluid end assembly, an input side interface thereof being connected to an output side interface of the third module. The reduction gearbox assembly, the crankcase assembly, the crosshead box assembly, and the fluid end assembly are sequentially connected.

The utility model discloses a diaphragm pump for conveying ammonium phosphate slurry, which is characterized in that a driving motor is arranged on a cylinder body of the diaphragm pump, the driving motor is connected with a worm, the worm is connected with an eccentric wheel set, the eccentric wheel set is connected with a connecting rod through a crosshead, a plunger is arranged at the front end of the connecting rod, and the front end of the plunger is in non-contact connection with a diaphragm on an overflowing device. And the diaphragm is arranged in the middle of an overflowing pipeline in the overflowing mechanism. The plunger pump has the advantages that the diaphragm is in contact with a medium, corrosion and abrasion to the plunger caused by the direct contact mode of a traditional plunger pump and the medium are avoided, the operation cycle is prolonged, and the maintenance cycle is about one year. The maintenance cycle is prolonged, and the maintenance cost and the production cost are saved; 2, maintenance personnel are invested, the plunger pump is maintained by two persons on average, and the salary of each person is about 160000 yuan every year, and the salary of the maintenance personnel is about 160000 yuan every year; the diaphragm pump is only planned to be overhauled once every year and does not need to be maintained by a full-time maintainer; and 3, the safety risk and the environmental health risk are correspondingly reduced.

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.

The invention belongs to the technical field of reciprocating fluid conveying pumps, and particularly relates to a transmission part box body and eccentric transmission shaft subassembly combination structure. The invention provides a transmission part box body and eccentric transmission shaft subassembly combined structure which is good in use effect. The device comprises a transmission case 1, a crosshead 6, an eccentric transmission shaft subassembly 2 and a piston rod lubricating device 3 are arranged in the transmission case 1, and the device is characterized in that the front side of the crosshead 6 is connected with a piston rod 4 and a flange 5, and the piston rod 4 penetrates through the piston rod lubricating device 3; the small end of a connecting rod 21 on the front side of the eccentric transmission shaft subassembly 2 is connected with the crosshead 6 through a pin shaft bearing 7, and the two sides of a transmission shaft 24 on the rear side of the eccentric transmission shaft subassembly 2 are connected with the transmission case 1 through supporting bearings 9 on the two sides; the eccentric transmission shaft subassembly 2 is a crank connecting rod mechanism, the middle position of a transmission shaft 24 is connected with two oppositely-arranged crank eccentric balance weight wheels 23 in series, and the transmission shaft 24 is connected with the crank eccentric balance weight wheels 23 through keys 27.

The present application belongs to the new technical field of integrated compressor and pump functions, and discloses a gas-liquid two-phase reverse driving vertical compression pump, which comprises a driving motor speed reducer, a three-throw five-support-point split crankshaft, a bearing connecting sleeve, an integral connecting rod, a reverse driving crosshead, a combined plunger, a pump body, an inlet and outlet gas-liquid two-phase combined valve, a bearing, a bearing cover, a bearing seat, a pump cover, a bearing gland and a sealing assembly; the driving motor speed reducer shaft is directly connected with the inner hole of the three-throw five-support-point split crankshaft to drive the three-throw five-support-point split crankshaft to rotate, and the rotation of the crankshaft is converted into the vertical reciprocating motion of the reverse driving crosshead through the integral connecting rod. The pump body and the machine body are designed in an integrated manner in the present application, so that the mold opening mold is reduced, the production is facilitated, the overall structure has high reliability, and the errors caused by assembly of the split body can be avoided; due to the coaxial arrangement of the inlet and outlet combined valve and the plunger, the pump body is clamped once, and the installation hole machining of the combined valve and the plunger is completed.

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.

This invention discloses a method for operating a large turbocharged two-stroke single-flow crosshead compression ignition internal combustion engine. The method involves observing the pre-injection pressure (PCP) in the corresponding cylinder within the crankshaft angle range between the pre-injection and main fuel injection, comparing the PCP with the commutation charge (CP) within the same range during the compression stroke, and increasing or decreasing the size of the pre-injection in the next revolution based on the calculated difference between the PCP and CP. The invention also relates to a large turbocharged two-stroke single-flow crosshead compression ignition internal combustion engine. By performing at least one pre-injection and adjusting the size of the pre-injection in subsequent revolutions based on the comparison of PCP and CP, robust pre-combustion of the desired size is achieved, allowing the main combustion to shift to a later stage during the expansion stroke, resulting in a significant reduction in stage 5 excitation without the risk of diesel knock.