1289 results about "Oil distribution" patented technology

The invention relates to a hydraulic oil distributing and controlling device of a crane hydraulic system, which consists of a first oil inlet and a second oil inlet which are used for communicating with at least two duplex pumps, a first oil outlet and a second oil outlet which are used for supplying oil for a main hoisting motor and an auxiliary hoisting motor as well as a third oil outlet and a fourth oil outlet which are used for supplying oil for a derricking cylinder and a telescopic cylinder; the first oil inlet and the second oil inlet are communicated with the four oil outlets through an oil circuit; control valves are arranged at least on the communicating oil circuits of the first oil inlet and the second oil outlet as well as the third oil outlet and the fourth oil outlet; the control valves are arranged at least on the communicating oil circuits of the second oil inlet and the first oil outlet as well as the second oil outlet and the third oil outlet. The hydraulic oil distributing and controlling device can realize interfluent oil supply of the two duplex pumps so as to improve the operation speed of the corresponding operating condition and operation efficiency, and can use any duplex pump to supply oil respectively to realize a flexible and convenient flow distribution proposal combined by diversified operating conditions.

The invention provides a method for analyzing remaining oil distribution of a fractured-vuggy reservoir, belonging to the fields of numerical reservoir simulation and oil-gas field development. In the method, a complex medium consisting of a cave medium, a crack medium and a pore medium is partitioned into a plurality of space unit blocks in a space field; each block consists of V, F and M units which represent a cave, a crack and a substrate in the block respectively and constitute a V-F-M model; the flow of a multi-phase fluid in the complex medium is described by the motion of a fluid among the units in each block and the motion of a fluid among the units of different blocks; and the flow of the fluid among the units can be considered as infiltration flow, pipe flow or laminar flow between parallel walls, Darcy flow or non-Darcy flow. According to the method, scientific description and accurate numerical simulation of the fractured-vuggy reservoir are realized, and technical foundations are laid for the alignment of the remaining oil distribution position of the fractured-vuggy reservoir with a numerical simulation technology, quantitative determination of the reserves abundance of the reservoir, scientific and reasonable development of oil fields provided with the reservoir and final increase in the recovery ratio.

An engine oil distribution system for an internal combustion engine includes a main gallery and a separate oil gallery for piston cooling nozzles. The separate gallery may be controlled by a control valve that regulates the oil flow. The oil flow to the separate gallery may be controlled by an electronic control module in accordance with the piston cooling needs, for example, varied as a function of the load applied to the engine, or as a function of engine temperature. Preferably, engine temperature is sensed by coolant fluid temperature, or directly measured metal temperature, correlated to the thermal state of the piston.

The invention discloses an electromagnetic semicontinuous casting device and a casting method thereof. The electromagnetic semicontinuous casting device comprises a crucible smelting furnace, a crucible standing furnace, a flow control mechanism, a split-flow device, an electromagnetic crystallizer system and a vertical semicontinuous casting machine, wherein the electromagnetic crystallizer system is a metal inner sleeve crystallizer system in which a group of build-in excitation coil is fixed, and comprises a metal inner sleeve, a cooling water cavity, the excitation coil, an oil supply system, an oil distribution system and a protective gas ring. According to the electromagnetic semicontinuous casting device disclosed by the invention, through a method of adjusting the frequency of electrical current, duty ratio and average current strength, the electrical current in a unique wave shape is formed in the single excitation coil placed in the cooling cavity of a crystallizer, so that desired forced convection or shaking effect is formed in the crystallizer with low current intensity; the grain of ingot blank is significantly refined; and columnar crystals are significantly reduced or eliminated to lower macroscopic segregation and realize the technical effect of low-stress casting. Under the condition of similar functional effects, the size of the electromagnetic crystallizer system is one third to one half of that of an original electromagnetic crystallizer system.

It relates to the after potential exploration of an oil filed, with the ability of analyzing the oil distribution, left resource quantity, and so on. It comprises the data inspection device, data preprocessing device, KH value separation device, oil well water absorption preprocessing device, water absorption section separation device, dynamic personnel analysis separation device, small layer weighting separation device, single sand separation result accumulation device, data base, water filling effect, strata HK, and weighting of the oil reserve weighting by the dynamic personnel, determining the strata output through the water absorption section, water content of the strata through well fluid section, with the whole process being computerized and accurate.

The invention relates to a pore-level simulation experimental apparatus for migration of pore-throat scale elastic microspheres in a porous medium, belonging to the field of pore-level flow simulation technology. Aiming at the pore throat characteristics of the real oil reservoir rocks and the dimension characteristics of the pore-throat scale elastic microspheres, the invention designs a microcosmic visual transparent quartz sand model suitable for the pore-throat scale elastic microspheres and constructs an image real-time acquisition and data analysis system to realize real-time observation, acquisition and quantitative analysis of the migration process of the pore-throat scale elastic microspheres, a distribution image and a remaining oil distribution image, real-time measurement of migration of the pore-throat scale elastic microspheres and injection pressure during oil displacement and measurement and analysis of output concentration, water content and oil production of the pore-throat scale elastic microspheres; the designed microcosmic visual transparent quartz sand model can reflect the pore throat characteristics of the real oil reservoir rocks, and as the model is made of transparent quartz sands through filling, the model is convenient to clean and can be repeatedly filled.

The invention belongs to the field of sealing engineering of automobile transmission devices, and particularly relates to a testing device used for estimating and testing the performance of an automotive rotary sealing ring. The technical scheme of an automotive rotary sealing ring testing device includes that the automotive rotary sealing ring testing device is used for testing the performance of the sealing ring and comprises a driving motor, a pump, a filter, an oil tank, an overflow valve, a pressure sensor A, a flowmeter, a torque sensor, a variable frequency driving motor, an oil inlet sleeve, an oil distribution sleeve, a pressure sensor B, a temperature sensor, a heat-sink cooling device and a box body used for fixing the oil inlet sleeve. The automotive rotary sealing ring testing device can be used for real simulation of a real working environment of the rotary sealing ring, a plurality of different working conditions can be provided by means of speed regulation, pressure regulation, temperature controlling and the like, and the performance of the sealing ring can be estimated by means of testing of a leakage rate and abrasion at the same time.

The invention discloses a numerical simulation method taking dynamic changes of a seepage parameter of a water-drive reservoir into consideration. The numerical simulation method comprises the following steps: S1, establishing a numerical simulation model of the reservoir, and in an iterative computation process, firstly performing computing and solving to obtain a pressure and a saturation data field of each grid block; S2, computing a water-phase flow of each grid block and computing a directional surface flux of each grid block and a total surface flux to obtain data fields of the directional surface fluxes and the total surface flux; S3, establishing a change relationship model of a reservoir permeability along with the directional face fluxes and updating a permeability data field; S4, establishing a change relationship model of a reservoir relative permeability curve along with the total face flux and re-calibrating an endpoint value of the relative permeability curve; and S5, obtaining modified reservoir permeability and relative permeability curves for circular calculation of next time step. The numerical simulation method is capable of providing theoretical support for accurately predicting remaining oil distribution, quantitatively computing movable remaining oil, making an oilfield development plane and directing oilfield digging potential evaluation.

The invention relates to a reservoir fluid distribution quantitative interpretation method based on the rock physical model theory. The method includes the steps that a Gassmann model is determined as a rock physical model and is calibrated; on the basis that elastic parameters related to lithological characters and oil-gas possibility are obtained by carrying out pre-stack simultaneous inversion with gather data of different angles, oil bearing parameters before and after exploitation are acquired based on the rock physical model; meanwhile, quantitative porosity and shale content parameters are obtained through reservoir physical property inversion, and the porosity and shale content parameters are corrected with an iterative modification and verification method based on the rock physical model; fluid factors are resolved by combining the rock physical model, a longitudinal wave observation result and a transverse wave observation result; oil saturation or water saturation in a basal state and oil saturation or water saturation in a monitoring state are obtained according to the rock physical model, sound wave parameters and the fluid factors, and are respectively corrected together with production dynamic data; remaining oil distribution is obtained on the basis that oil saturation in the monitoring state is obtained according to the corrected oil saturation in the basal state and the corrected oil saturation in the monitoring state.

The invention relates to an experimental detecting system and method for distribution of remaining oil in a fracture-cavity reservoir bed. The experimental detecting system comprises a constant-flux pump, a container containing formation water, a container containing compounded crude oil, a container containing a contrast agent, a four-way valve, a fracture-cavity reservoir bed flat model, a core holder, an X-ray tomoscan system and a data processing and imaging system, wherein the container containing formation water, the container containing the compounded crude oil and the container containing the contrast agent are connected with the three inlets of the four-way valve through a first pipeline, a second pipeline and a third pipeline respectively; the outlet of the four-way valve is connected with the injection opening of the core holder through a pumping pipeline; the output opening of the core holder is used for outputting a liquid; the liquid output from the output opening of the core holder is collected in a measuring cylinder. According to the experimental detecting system and method, the oil-water displacement process under a formation condition is simulated actually, and the percolation mechanism and the remaining oil distribution rule are similar to practical water injection in a mine, so that the detection conclusion has a guiding significance in mine application, and the problem that the water injection and oil displacement process cannot be visual is solved.

The invention discloses a variable valve timing system and relates to engines. According to the variable valve timing system, a variable lift hydraulic tappet component is arranged between an air inlet cam and an air inlet valve, an electronic device is used for judging the working conditions of an engine, when the engine speed is low, the pressure oil supply of an oil pump is cut off, the variable lift hydraulic tappet component only serves as a passive power transmission piece, the air inlet valve is only driven by the air inlet cam, and the air inlet valve has basic air valve opening / closing time, duration time and lift; when the engine speed is high, the pressure oil supply of the oil pump is opened, the variable lift hydraulic tappet component periodically charges and discharges oil under the indirect control of an air inlet valve oil distribution cam, the lift is changed, the air inlet valve is opened before the air inlet cam drive and closed after the drive, and the air inlet valve has air valve opening / closing time, duration time and lift under the high-speed working condition. The variable valve timing system is featured with compact structure, small valve seating impact and easiness in implementation.

The invention provides a similar limit water cut period take-turn water drive method for a multi-layer sandstone reservoir. The method includes the steps that a geological model based on single-cause sand bodies is established; on the basis that the geological model based on the single-cause sand bodies is established, a remaining oil distribution model based on the single-cause sand bodies is established; the single-cause sand bodies similar in property are combined into cause sand body sets; according to the reservoir characteristics of different single-cause sand body sets in a layer system and the remaining oil distribution conditions, the corresponding vectorization water drive adjustment scheme is determined; take-turn water drive based on the single-cause sand body sets is performed. With the similar limit water cut period take-turn water drive method for the multi-layer sandstone reservoir, influences of the heterogeneity of reservoir stratums of the multi-layer sandstone reservoir on water drive development can be reduced to the maximum, comprehensive displacement and balance displacement in a plane in the longitudinal direction of the single-cause sand bodies are achieved, and therefore a high-strength and high-efficiency water driving flow field can be established, and water drive sweep efficiency and water drive recovery efficiency can be improved substantially.

A method of operating a multiple-compressor refrigeration system is provided. This method includes the steps of supplying, via a common supply line, refrigerant gas and oil to a plurality of compressors coupled in series, and attaching an oil flow conduit between adjacent compressors of the plurality of compressors. The oil flow conduit is configured to move oil from a compressor with a relatively higher pressure to a compressor with a relatively lower pressure. The method further includes controlling the pressure for each of the plurality of compressors by regulating a speed at which each of the plurality of compressors operates in order to maintain a pressure differential between the adjacent compressors to facilitate the flow of oil from the compressor with the relatively higher pressure to the compressor with the relatively lower pressure.

The invention discloses a mobile refueling network system and method. A mobile refueling network system comprises a mobile terminal arranged on a moving vehicle. The mobile terminal is used for collecting information of oil mass in an oil tank in true time, if the oil mass are lower than a preset value, oil supplying requesting information is generated, and a confirmation message from a driver is received, and the mobile terminal sends oil mass information and location information to an oil distribution center after receiving the confirmation message. The oil distribution center is used for receiving the oil mass information and location information sent by the mobile terminal, generating a refueling path according to the location information, and informing the nearest oil distribution center to deliver oil to the moving vehicle. According to the mobile refueling network system and method, the mobile terminal is arranged on the moving vehicle, oil mass information of the vehicle can be collected in true time, refueling requirements of vehicles under different circumstances can be met fast through information exchanges between the mobile terminal and the oil distribution center.

The invention discloses a method for identifying a thickened oil reservoir by utilizing nuclear magnetic resonance well logging and belongs to the field of reservoir fluid identification.The method comprises the steps that a well having nuclear magnetic resonance well logging data is processed to obtain a standard T2 distribution spectrum; the nuclear magnetic porosity of the reservoir is calculated, and a nuclear magnetic T2 spectrum cutoff value method is utilized to calculate irreducible water saturation SBVI; a spectrum coefficient method is utilized to calculate irreducible water saturation SSBVI; finally, reservoir fluid identification factors are calculated; a fluid identification chart is established according to the fluid identification factors, and accordingly a reservoir fluid is accurately judged.The method utilize the characteristic that the two calculated irreducible water saturations have remarkable difference when thickened oil exists in the reservoir to effectively identify the reservoir, can adopt a method of utilizing the nuclear magnetic T2 spectrum cutoff value method and the spectrum coefficient method to calculate the difference of the irreducible water saturations to achieve accurate and reliable identification of the thickened oil reservoir in a thickened oil distribution area and is an effective fluid identification method for exploration and evaluation of large-area thickened oil reservoirs of our country at present.

The invention discloses a high-performance multiple-blade hydraulic motor which comprises a casing, a rotor, vanes, seal strips, oil distribution cones and cushion blocks, wherein the rotor is arranged in the center; the casing is arranged at the external part; the oil distribution cones are arranged in the hollow circular-truncated-cone surfaces at the two ends of the rotor; the vanes are arranged in hollow circular rings at the opposite angles of the casing and also arranged in the grooves of the rotor, and form angles together with the rotor; one plane of each vane is fitted with the circular-truncated-cone side surface of the corresponding oil distribution cone; the seal strips are arranged between the rotor and the vanes, one side of the plane of each seal strip is fitted with the rotor, and one side of the circular-truncated-cone-surface of each seal strip is fitted with the circular-truncated-cone surface E1 of the corresponding vane; the cushion blocks are arranged in the hollow circular rings at the opposite angles of the casing, and gaps formed by the casing, the vanes, the rotor and the seal strips are just filled up with the cushion blocks. All sealed parts adopt face seal; the vane type hydraulic motor is small in size, large in torque, high in efficiency and specific power, compact in structure, easier to process, lower in cost and long in service life.

The invention discloses a carbon dioxide mixed-phase flushing efficiency and remaining oil distribution evaluation method and an isolated plant, and belongs to the technical field of oil-gas field developing experiment. The device is composed of an injection-production simulation system and a data collecting and processing system, wherein the injection-production simulation system is composed of an injection device, a production device, a supercharging device, a closed container which simulates oil deposit and a sample which is arranged inside the closed container and simulates oil deposit core; the data collecting and processing system comprises a light source below a nonopaque passageway of the closed container which simulates the oil deposit and a photographic device above the nonopaque passageway of the closed container which simulates the oil deposit, and the photographic device is connected to a data processing device. The device can be used for studying oil-displacement mechanism of different development modes such as water driving, chemistry driving and gas driving under high temperature and high pressure conditions. The evaluation method can visually evaluate a mixed-phase process of multiple contact between the carbon dioxide and crude oil in the sample, determine flushing efficiency, impact scope and remaining oil distribution of the carbon dioxide drive in the oil deposit, and guide the regulation of the carbon dioxide drive scheme on scene.

The invention discloses a frequency-conversion multi-online system and a control method of lubricating oil of a compressor thereof. The control method comprises the following steps of: carrying out oil path control according to a working frequency of a frequency-conversion compressor and an operation state of a constant-frequency compressor; and judging whether oil return operation is needed or not, and starting to return the oil when the oil return operation is needed simultaneously. According to the control method provided by the invention, the corresponding oil path control is carried out according to operation states of the frequency-conversion compressor and the constant-frequency compressor in the frequency-conversion multi-online system, so that an oil amount in the compressors can be ensured to be sufficient, and no phenomena of oil shortage or non-uniform oil distribution of the compressors exist. Furthermore, the oil path control is carried out, and whether the oil return operation is needed or not is judged simultaneously, and oil return treatment is started in time in the need of the oil return operation, so that the oil return has no need of being carried out at a fixed period in an operation process of the entire machine. Moreover, the oil return treatment is started in the need of the oil return, so as to realize intelligent oil return.

An oil scavenging system and method suitable for use in a gas turbine engine having a bearing housing. The bearing housing provides for arcuate slots within the housing and a plurality of peripherally arranged apertures disposed for cooperation with the arcuate slots. During rotation of the bearing and shaft, the rotational momentum induces rotation of the oil which distributes the oil to the peripheral circumference of the housing for eventual passage through the slots and apertures. The arrangement maximizes the use of the circumferential space of the bearing for efficient oil distribution.

The invention discloses a crack-contained real sandstone core physical simulation and oil displacement effect evaluation method. According to the method, first, a crack-contained real sandstone core is selected, and working fluid containing Mn<2+> is prepared; the core is vacuumized, the working fluid is saturated, and centrifugation is performed on the core to establish irreducible water saturation; the core is vacuumized, saturated experimental oil is pressurized, and original oil saturation is calculated; a nuclear magnetic resonance T<2> spectrum of a core sample is tested, and original oil distribution is obtained; water containing Mn<2+> is injected into the core sample, and oil displacement by water is performed till an outlet contains water by 100%; another nuclear magnetic resonance T<2> spectrum of the core sample is tested, and remaining oil distribution after oil displacement by water is obtained; a profile control agent is injected into the core sample, and subsequent oildisplacement by water is performed till the outlet contains water by 100%; another nuclear magnetic resonance T<2> spectrum of the core sample is tested, and remaining oil distribution after profile control and displacement is obtained; and according to the T<2> spectrum obtained at each stage, the oil displacement effect after oil displacement by water and the oil displacement effect after profile control and displacement are quantitatively analyzed, including oil displacement efficiency in cracks and matrix pores at each oil displacement stage. Through the method, the oil displacement effectof the crack-contained sandstone core can be evaluated quantitatively and accurately.

An external-rotor radial plunger hydraulic pump integrated with motors is of a external-rotor and internal-stator structure. The inside of a rotor is fixedly provided with a radial equidistant cam which is used for absorbing oil and pressing oil. When the cam is driven by the rotor to rotate, the rotation is converted into a linear reciprocating motion by a bearing and a plunger pin to obtain high-pressure oil liquid; the oil distribution in every plunger cavity is achieved through a one-way cone valve which is arranged on a stator, and the opening and the closing of the one-way valve are controlled through the pressure inside the plunger cavity; and the external-rotor radial plunger hydraulic pump is driven to operate by disk motors which are arranged on both sides of a pump body, the stator of each disk motor is fixed connected to the floor, the rotors of the disk motors are designed into one part with the rotor of the external-rotor radial plunger hydraulic pump, so that the integrated design of the motors and the external-rotor radial plunger hydraulic pump is achieved. The external-rotor radial plunger hydraulic pump integrated with the motors has the advantages of being compact in structure, simple in transmission, symmetric in force bearing, high in energy utilization rate, high in volume efficiency and pump-motor-integrated.

The invention provides a residual oil distribution prediction method and device based on a deep convolutional neural network, and belongs to the technical field of oil development. The prediction method comprises the steps of simulating and establishing a training data set according to geological parameters and development parameters of an oil reservoir of a type to which a target oil reservoir belongs; training by using the training data set to obtain a deep full convolutional coding and decoding neural network prediction model; and predicting the remaining oil distribution of the target oil reservoir at any moment by adopting the deep full convolutional coding and decoding neural network prediction model. According to the prediction method, through geological parameters and development parameters of a target oil reservoir, factors influencing remaining oil distribution and influences of time sequences are considered, different numerical simulation schemes are set for the oil reservoir of the type, and a data set is established through oil reservoir numerical simulation; and then a deep full convolutional coding and decoding neural network is used as a framework for training, so that rapid and accurate prediction of remaining oil distribution of the oil reservoir at any moment is realized, and guidance is provided for efficient development of the oil reservoir.

A bowl for supplying oil to at least two oil-distribution circuits which are connected to a planet carrier of an epicyclic reduction gearbox, the planet carrier rotating and the oil coming from a fixed oil ejector, the bowl being designed to be secured to the planet carrier and having a substantially cylindrical shape and being open radially towards the inside with respect to an axis. The bowl is divided into a circumferential succession of separate cups each designed to communicate with one of the oil distribution circuits A reduction gearbox with its supply device and a method of operation in a turbomachine are also disclosed.

The invention discloses a spherical hydraulic motor, which comprises a casing, a rotor, two blades, four sealing strips, two oil distribution cones and two cushion blocks. all the sealing places of the motor are surface sealing, and the motor has the advantages of large displacement, high pressure and efficiency, large specific power, compact structure, easy machining, lower cost and long service life.

The invention discloses a prediction method for remaining oil distribution of a water flooding development oil field based on deep learning. The prediction method comprises the following steps: collecting and arranging data; performing gridding on the reservoir; preprocessing the data; establishing an SVM classification model for judging whether the unit bodies are exposed to water or not; establishing a neural network model for residual oil distribution prediction; training and parameter adjustment of an SVM classification model and a neural network model; and selecting a target block for model verification by taking the prediction accuracy and the prediction time consumption as evaluation indexes. The residual oil distribution can be quickly and accurately predicted by utilizing the field data of the oil field.

The invention belongs to the technical field of explored and developed reservoir description, and particularly relates to a remaining oil description method based on reservoir architecture. The method comprises the steps that firstly, sedimentary facies of a target area are determined, and the sedimentary scale of the target area is subdivided; secondly, level dividing is performed on the reservoir architecture according to the subdivided sedimentary scale of the target area, and the reservoir architecture corresponding to a single sand body in the target area is determined; thirdly, a contact relation of the single sand body in the target area is built according to a reservoir architecture rock-electricity relation corresponding to a cored well in the target area; fourthly, according to the built contact relation of the single sand body in the target area, a reservoir architecture model covering the target area is built, and remaining oil distribution over control of the reservoir architecture covering the target area is determined. Accordingly, remaining oil potential tapping is effectively guided, and a basis is supplied to formulation of a development program.

The invention relates to a process for a casting oil distribution disc of a vane pump, which belongs to the precision casting production process of hydraulic industry. The process adopts a wet mold molding composite casting process of preparing core by pre-coated sand, which comprises process design, mold design and manufacture, core preparation, sand core assembly, modeling, casting and sand removal and is characterized by respectively blowing and assembling with three to six sand cores, integrally making out an oil channel on a work surface, and placing a bonding surface on a finish surface. For the cast product casted by the invention, no fash existed, the oil channel is smooth, and the noise of the vane pump is reduced. The invention also can be applied in casting of oil distribution discs of PFX31, PFX41, PFX51 and the like, such as manufacture of oil distribution disc of various vane pumps. Therefore, the invention can remarkably improve the quality of oil distribution disc casting, and then remarkably improve the quality of vane pump product, and has significant economic and social benefits.

The invention discloses a power steering pump. The power steering pump is characterized in that a pump shaft is connected in series with a front oil distribution disc, a blade assembly and a front oil distribution disc into a whole so as to be installed in a pump body cavity, the front oil distribution disc and a front wall of the pump body cavity form an oil-out front cavity in an enclosed mode, and a pump body is provided with a valve hole on the side of an outer circle of the pump body cavity; the valve hole is communicated with the oil-out front cavity, the valve hole is internally provided with a flow safety control valve, and the oil-out front cavity is communicated with an oil outlet at the front of the pump body through a high-pressure oil channel; the outer circle of the blade assembly and an inner wall of the pump body cavity form a pump body back cavity in an enclosed mode, and the valve hole is communicated with the pump body back cavity through a return oil channel; and blades are driven by the pump shaft to rotate so as to finish an oil absorption and draining process, and the flow safety control valve controls oil mass discharged from the oil-out front cavity through the oil outlet to keep constant. The power steering pump provided by the invention has the advantage of shortening a high-pressure oil flow channel with smoothness in transition, reducing flow pressure loss, and avoiding that the power steering pump is failed due to serious heating because the flow channel in the traditional structure is long and bent by adopting a high pressure structure of the pump body front cavity.

The invention discloses a plunger pump, which comprises a pump shell, a rear cover, an oil outlet, an oil inlet and an axial hydraulic plunger machine. The hydraulic plunger machine comprises a transmission shaft and a cylinder axially sleeved on the transmission shaft; one side of the cylinder is provided with nine cylinder holes; a plunger-skid shoe assembly is arranged in each cylinder hole; aswing component is movably pivoted to one side, exposed out of the cylinder hole, of the plunger-skid shoe assembly, and an oil distribution disc is fixedly arranged on the other side of the cylinder;the rear cover is parallel to the transmission shaft, and a small-displacement regulating device and a large-displacement regulating device are arranged on the rear cover and the transmission shaft symmetrically in equal distance; the small-displacement regulating device and the large-displacement regulating device penetrate the rear cover into the pump shell to be separately connected with the end margin of a swing component and flexibly adjust an included angle between the swing component and the transmission shaft through a control cylinder component; and the rear cover is also provided with an electric-hydraulic valve electrically connected with the large-displacement regulating device and a safety pressure valve. Therefore, the plunger pump has the characteristics of small vibration,stable pressure, energy saving, improvement on production efficiency, low cost and long service life.