306 results about "Cylinder flow" patented technology

The invention discloses a simulating method of the forming process of an unconventional oil and gas reservoir hydraulic fracturing complex fracture net. The method includes the steps of a, reestablishing natural fracture distribution, estimating the properties of natural fractures, obtaining rock mechanical information and stratum stress information of a stratum from log data or a geological model, and obtaining a data file related to the well factory construction process; b, inputting the obtained parameters in an established natural fractured reservoir fracturing model coupling a well cylinder, fractures and the stratum; c, conducting numerical value solving on the model to obtain after-fracturing information such as fracture forms, opening degree distribution and pressure intensity distribution; d, analyzing the fracturing effect through a model calculating result, and making a preparation for numerical value simulation of the later-period production process. The fractured reservoirfracturing numerical value simulating method coupling the well cylinder flowing, the fracture deformation expanding, the multi-state natural fractures and the flowing of fluid in the fractures can quantitatively analyze the form of the unconventional reservoir segmented volume fracture net and is an effectively means for evaluating and optimizing the fracturing scheme.

The invention discloses a dual-motor BBW system with multiple working modes and voltage regulation modes. A brake fluid in a manual cylinder flows into two main cylinders by means of a brake pedal, and brake pressure is generated; and meanwhile, output power torque of two motors is controlled, and axial thrust is overlaid to pistons of the two main cylinders through a transmission device, so that electric power brake is realized. Through control of output torque of the two motors, pressure of the two main cylinders is transmitted to wheel cylinders, brake by wire is realized, and a pedal travel simulator is used for providing force for the brake pedal. Under the condition that the brake pedal is not stepped, the output torque of the two motors is controlled, so that the two cylinders generate pressure which is transmitted to the wheel cylinders through a hydraulic control unit, and accordingly, the active brake is realized. The invention further discloses a structure of a hydraulic control system, and the structure has multiple voltage regulation modes. The dual-motor BBW system has the advantages as follows: the system has multiple braking modes and voltage regulation modes, the most appropriate braking mode and voltage regulation mode can be selected according to dynamic properties of the motors during implementation and application, the reliability is high, and the failure protection capacity is high.

Described are an apparatus and a method for cooling a web. The apparatus includes an inner cylinder having a void therein and configured for coupling to a gas source. The apparatus also includes an outer cylinder having an inner surface, an outer surface to support a web and apertures between the inner and outer surfaces. The outer cylinder rotates about the inner cylinder so that gas provided to the void of the inner cylinder flows through the apertures that are adjacent to the void and passes to the outer surface of the outer cylinder to increase the heat transfer between the web and the outer cylinder. The volume of gas introduced into the vacuum deposition chamber during a process run is thereby limited. Advantageously, the apparatus enables higher deposition rates and increased productivity.

The invention discloses a pre-drying brown coal power generation system integrated with a first-class absorption heat pump and a pre-drying brown coal power generation method. The system mainly comprises such apparatuses as a traditional coal-fired power generation system, a steam fluidized-bed dryer with a built-in heater and the first-class absorption heat pump. According to the method, dry tail gas is used as a fluidizing and drying medium in the fluidized-bed dryer. The extracted steam of one stage of a steam turbine low-pressure cylinder flows through the built-in heater of the dryer to provide heat needed by evaporating moisture in brown coal. The dry tail gas serves as a high-temperature heat source for the heat pump, and turbine steam exhaust serves as a low-temperature heat source for the heat pump to generate low-temperature steam at a temperature between the temperatures of the dry tail gas and the turbine steam exhaust for heating the condensed water of the power generation system. The system is capable of reducing the steam extraction amount of a heat regenerative system, reducing the amount of waste heat emitted by the power generation system to the environment, realizing the utilization of the waste heat of the dry tail gas and the turbine steam exhaust and improving the efficiency of the power generation system.

An internal combustion engine control apparatus includes a fuel supplying mechanism supplying fuel to the internal combustion engine; an exhaust gas recirculating mechanism recirculating exhaust gas of the internal combustion engine to an intake side of the internal combustion engine; a flow adjuster selectively increasing and decreasing a strength of flow of the supplied fuel and the recirculated exhaust gas in a cylinder of the internal combustion engine; a stop controller controlling the fuel supplying mechanism to stop the supply of fuel and controlling the exhaust gas recirculating mechanism to stop the recirculation of exhaust gas, when the internal combustion engine is operated in a predetermined deceleration mode; and in-cylinder flow controller controlling the flow adjuster to increase the strength of the flow when the control to stop the supply of fuel is cancelled.

The invention relates to a glue spreading device, in particular to a glue spreading device for a board. The glue spreading device has the advantages that glue can be spread quickly, and the viscidityreduction of the glue can be avoided. According to the technical implementation scheme, the glue spreading device comprises a base, a trough plate, a movable plate, a fastening bolt, an inching switch, a top plate, a control box, a starting switch, a driving motor, a first bearing pedestal, a screw rod, nuts and the like; the rear side of the top of the base is fixedly connected with the trough plate which is internally provided with the movable plate, and the upper part of the front side of the trough plate is provided with the fastening bolt; and the inner bottom of the trough plate is provided with the inching switch. According to the glue spreading device, the glue in a compression cylinder can be pushed through a piston, so that the glue in the compression cylinder flows out through adischarging pipe; the glue falls onto the board for glue spreading; in this way, the glue can be spread quickly, and the viscidity reduction of the glue can be avoided; and the situation that air enters a discharging pipe and consequently the glue in the discharging pipe is solidified can be avoided through an anti-dry device.

The invention discloses an axial plunger pump flow distribution pair test oil membrane thickness test system and relates to the technical field of an electrically driven liquid pump. The system comprises an experiment compartment, a flow distribution disc, a cylinder flow distribution end surface, a cylinder main body, an end cover, a high-pressure oil pipe, a low-pressure oil pipe, a positioning pin, an A support bearing, a B support bearing and an oil return pipe, wherein the experiment compartment is of a casing-like structure and is internally provided with an experiment oil chamber; in the experiment oil chamber, the flow distribution disc is installed at the right end of a driving shaft; the axle center of the end cover is connected with the axle center of the cylinder main body through the positioning pin; the cylinder main body is internally provided with two plunger chambers symmetrical about the axle center; the end cover is provided with oil pipe holes at positions where the two plunger chambers are in butt-joint cooperation; one of the two oil pipe holes is connected with the low-pressure oil pipe, and the other is connected with the high-pressure oil pipe; and the cylinder flow distribution end surface is circumferentially uniformly provided with probes of three current vortex displacement sensors. A conventional flow distribution pair test simulation apparatus is simplified, and the actual pump working condition of a flow distribution pair is more accurately simulated.

The invention relates to the technical field of drying, in particular to a drying system, a clothes processing device and a drying system control method. The drying system comprises a drying draught fan, an air inlet channel and an air outlet channel, and the drying draught fan is provided with an air inlet and an air outlet; the two ends of the air inlet channel are communicated with the air inlet and an inner cylinder respectively; the two ends of the air outlet channel are communicated with the air outlet and the inner cylinder respectively; and an evaporator and a condenser are arranged inthe air outlet channel; a temperature and humidity sensor is arranged in the air outlet channel and used for detecting the humidity and temperature of circulating air in the air outlet channel; the gas in the inner cylinder flows through the air inlet channel, the drying draught fan, the evaporator and the condenser and flows back into the inner cylinder to form a drying loop. The drying system,the clothes processing device and the drying system control method have the advantages that the humidity and temperature of the circulating air in the air outlet channel are directly detected by usingthe temperature and humidity sensor, and compared with the scheme that a temperature sensor is used for detecting the temperature change of the rear of an outer cylinder, the detecting precision canbe improved, thereby accurately reflecting the dry and wet states of the clothes in the inner cylinder.

The invention provides an optimization method for a coal-bed gas field acquisition system. The method includes the steps of establishing the relational objective function of the total gas production capacity of a gas collecting pipe network and the output of each gas well; according to the data of a ground pipe network, establishing the flow model of the ground pipe network; according to the dataof a gas well structure, establishing a cylinder flow model; according to stratigraphic restraint conditions, establishing a capacity constraint model and a bottom hole flow pressure constraint modelrespectively; taking the ground pipe network flow model, the cylinder flow model, the capacity constraint model and the bottom hole flow pressure constraint model as constraint conditions to bring into the relational objective function, and according to the parameters of each gas well, calculating to obtain the output of each gas well.

The invention discloses a buffering oil cylinder. The buffering oil cylinder comprises a power cylinder used for connection with a load, wherein a buffering convertor is independently arranged on theexterior of the power cylinder; a power module and a buffering function module of the buffering oil cylinder are separately arranged and are connected through a channel connector; an oil line system is used for supplying oil to a buffering cavity and an oil return cavity and converting high pressure hydraulic oil from a hydraulic system into high pressure oil of a working cavity of the power cylinder, so that the power cylinder generates push force or pull force; when the power cylinder works reversely, the hydraulic oil of the working cavity of the power cylinder flows into a converting cavity of the buffering convertor so as to push a piston rod and a piston of the buffering convertor to move forwards; and when a buffering body on the piston rod enters a cushioning stroke, the flow areaof a buffering channel decreases to form a throttling channel, the pressure of the buffering cavity rapidly rises, and the pressure of the working cavity of the power cylinder also quickly rises to form resistance acting on the piston and piston rod of the power cylinder, so that a moving part of the power cylinder and a driven object gradually decelerate till stopping.

The invention discloses an oil cylinder stroke detection and control method based on hydraulic oil volume flow. The oil cylinder stroke detection and control method is characterized by comprising thefollowing steps that the volume change amount and the flow direction of the hydraulic oil in the oil cylinder are calculated by adopting a volumetric flow meter; the leakage coefficient is considered,according to the volume change amount of the hydraulic oil in the oil cylinder, the flow direction and the sectional area of the cylinder barrel, an oil cylinder stroke calculation value expression is obtained; the actual stroke value of each time of the oil cylinder is measured and recorded manually, the obtained oil cylinder stroke calculation value is combined, the final oil cylinder stroke detection value expression is determined through linear regression, and the absolute zero point and the full stroke position of the stroke are calibrated according to the proximity switch signal; the travel controller module is used for realizing collection, parameter setting, operational processing, display and control output of the volumetric flow meter and the proximity switch signal, and the oilcylinder stroke is accurately detected and positioned; the oil cylinder, the flow meter and the travel controller module are designed into an integrated device. The oil cylinder stroke detection andcontrol method is compact in structure, is not influenced by the stroke of an oil cylinder and is low in cost, does not need special machining of the oil cylinder body, and is easy to realize.

The invention belongs to the technical field of road engineering bituminous pavement water damage, and relates to an instrument for researching the anti-scouring capability of a material under the dynamic water pressure effect. The instrument is characterized in that a motor, the lower part of a slide way and a water cylinder are fixed on a test table; the upper part of the slide way is provided with a slide block; the slide block moves horizontally and straightly on the slide way; a motor rotary shaft and a cam wheel as well as the cam wheel and a crankshaft are connected by adopting an articulated mode; the left end of the slide block is connected with the crankshaft in an articulated mode, and the right end of the slide block is fixedly connected with a piston rod by a bolt, so that the piston rod moves horizontally and straightly; the piston rod and the water cylinder are connected by adopting a linear bearing; the water cylinder is internally filled with water; the lower part of the water cylinder is connected with a pressure transmitter for measuring the size of the water pressure; the upper part of the water cylinder is connected with a guide pipe; water in the water cylinder flows out of a scouring test element along the guide pipe under the effect of the dynamic water pressure effect. The beneficial effects of the instrument provided by the invention are that the instrument can simulate the applying and removing of load of a road material during the vehicle driving process as well as the scouring to the test element by water under the dynamic water pressure effect, and can reflect the mechanical damage situation of the road material under the combined action of load and water objectively.