35results about How to "Change flow area" patented technology

The invention belongs to the technical field of heat energy and power equipment and particularly relates to a variable flow whirlcone. The variable flow whirlcone comprises a rotatable inner hub, a fixed-type outer hub and rotatable blades, one sides of the rotatable blades are mounted on the fixed-type outer hub, and the other sides of the rotatable blades are mounted on the rotatable inner hub.The rotatable inner hub comprises an inner hub bottom plate and an inner hub outlet ring way, the fixed-type outer hub comprises an outer hub bottom plate and an outer hub outlet ring way, and the rotatable blades comprise rotatable blade bodies, first blade sliding shafts, first blade rotating shafts, second blade sliding shafts and second blade rotating shafts. According to the variable flow whirlcone, the blade mounting angle and the through flow area of the whirlcone can be changed, thus the flow of air entering the whirlcone and the swirling number can be changed, the defect that as for atraditional fixed-type whirlcone, the blade angle and the air flow cannot be adjusted is overcome, and non-detachable online adjustment of the whirlcone is achieved; and the time of shutting down forreplacing and test adjustment is saved, and the utilization rate of the variable flow whirlcone is increased.

The invention relates to a preset pressure-adjustable capillary pressure adjuster, which is characterized by comprising an upstream shell, a downstream shell, a control body, a pressure adjusting assembly and a pressure adjusting spring, wherein one end of the upstream shell is provided with a water inlet; the pipe diameter of the other end of the upstream shell is enlarged; the downstream shell comprises a first cylinder and a second cylinder; the end part of the first cylinder is connected with the pipe diameter enlarged end of the downstream shell; circumferential threads of the control body are connected with the interior of the first cylinder; the middle part of the control body is provided with a through hole; one end of the pressure adjusting assembly is a conical closed end; the other end of the pressure adjusting assembly is an open end; the outer diameter of the open end is enlarged; the pressure adjusting assembly is provided with water inlets near the position of the conical closed end; the pressure adjusting assembly is arranged in the first cylinder; water stop assemblies are arranged between the circumferential direction of the open end of the pressure adjusting assembly and the circumferential direction of the first cylinder; the conical closed end of the pressure adjusting assembly passes through the through hole on the control body; the water inlets near the conical closed end are located in a cavity formed by the upstream shell and the control body; another water stop assemblies are arranged between the pressure adjusting assembly and the control body; and the pressure adjusting spring is sheathed with the periphery of the cylinder of the pressure adjusting assembly.

The invention relates to a turbine guide vane, a turbine and an aircraft engine. The turbine guide vane comprises a movable part and a fixed part (9), the fixed part (9) is fixed relative to a turbine case, the movable part is connected with the fixed part (9) and located on one side of the suction surface of the turbine guide vane, and the movable part can move relative to the fixed part (9) so as to change the flow area between every two adjacent turbine guide vanes. Compared with the manner that the front edge or the tail edge of the turbine guide vane is arranged to be of a rotatable structural form in the prior art, the turbine guide vane has the advantages that the movable part is arranged on one side of the suction surface of the turbine guide vane, cooling of the interior of the turbine guide vane is not influenced, the whole vane, from the front edge to the tail edge, of the turbine guide vane can be cooled by taking corresponding cooling measures, and the condition that the life is shortened due to the fact that some portions of the turbine guide vane are impacted by high-temperature fuel gas is prevented.

The invention discloses a current limiting device with a hole diameter adjustable. Two symmetric through holes are formed in a cylinder wall of a mandrel seat. The portions, with the two through holes, of the cylinder wall are respectively and fixedly connected with an outer connecting tube with inner threads. A cylinder opening at one end of the mandrel seat is provided with a sealing cover through threads. A mandrel in a stepped shape and capable of rotating is composed of the mandrel and a hole shrinkage connecting shaft. The mandrel with a cylindrical sealing cavity is matched with an inner hole of the mandrel seat in a movable mode. Through holes arranged symmetrically and with hole diameters enlarged gradually are formed in the mandrel along the radial direction. The two symmetric through holes in the mandrel with the largest diameters and the two symmetric through holes in the mandrel seat are the same in the hole diameter and are matched in a mode of coaxial line. A cylinder opening of the other end of the mandrel seat is provided with a gland nut through threads. An inner hole of the gland nut is movably matched with the connecting shaft. The connecting shaft between a mandrel bumper and the gland nut is provided with a sealing piece. According to the current limiting device with the hole diameter adjustable, under the condition that shutdown operation is not needed, the hole diameter of an oil nozzle can be adjusted conveniently to adjust flow and oil extraction differential pressure can be adjusted and controlled according to variation of oil temperature so that blowing period of an oil well can be prolonged, operation is simple and time and labor are saved.

The invention provides a step-less adjustment valve and a liquid rocket. The step-less adjustment valve comprises a main shell, a liquid inlet and a liquid outlet formed in the main shell and furthercomprises a valve cup arranged in the main shell, a shift structure, and a driving device, wherein the valve cup is provided with a cup opening communicated with the liquid inlet and a flowing throughopening molded in the cup wall, and the flowing through hole communicates with the liquid outlet; the shift structure is movably arranged on the outer surface of the cup wall of the valve cup; and the driving device is connected with the shift structure and drives the shift structure to reciprocate in a linear mode on the valve cup so as to change the flowing through area of the flowing through hole.

A novel load sensitive balance valve is composed of a valve body, a control piston, a main balance spool and a pilot spool spring. The new balance valve is mainly composed of a one-way function component, an overflow function component, and a throttling spool component that plays the main role of flow control; When it is blocked, the high pressure in the load chamber acts on the right side of the main balance spool to greatly reduce the action area, forming a feedback signal; the force of the load acting on the balance spool will change with the change of the load, thereby changing the balance The flow area of ​​the valve maintains the flow stability and ensures the smooth movement of the boom; according to the oil flow direction, when the balance valve is in front of the hydraulic cylinder, the oil enters from the oil inlet and flows out through the one-way valve flow channel in the valve body. The pressure loss is small.

According to the intelligent shower equipment provided by the invention, the water temperature can be controlled without manually adjusting the faucet, and the operation is convenient. The temperature control mechanism comprises a cold water pipeline, a hot water pipeline and a water outlet pipeline, and is characterized in that the cold water pipeline and the hot water pipeline are arranged in a shell of the temperature control mechanism, a rack is arranged in a sliding rail attached to the rack in the shell in a sliding mode, and rack check blocks are arranged at the two ends of the rack; the rack check blocks are slidably inserted into the hot water pipeline and the cold water pipeline respectively, a gear meshed with the rack is arranged above the rack, the gear is in transmission connection with a servo motor, the servo motor is arranged on the inner wall of the shell, a single-chip microcomputer is arranged on the inner wall, and the single-chip microcomputer has a memory selection function. A front temperature sensor I and a front temperature sensor II are arranged in the cold water pipeline and the hot water pipeline, a rear temperature sensor is arranged in the water outlet pipeline, and the temperature sensors are in electric control connection with the servo motor and the single-chip microcomputer.

The invention provides a lower oscillation sliding vane jet flow stroke-increasing hydraulic oscillator. A vortex cavity is fixedly arranged in an outer sleeve and used for generating vibration; a flow inlet hole is formed in one end of the vortex cavity, and a flow outlet hole is formed in the other end of the vortex cavity and located in the circle center position of the vortex cavity; a slidinggroove is formed in one side of the flow outlet hole and internally provided with a movable sliding block sliding in the axial direction; and one end of the stroke of the movable sliding block partially covers the flow outlet hole, and the other end of the stroke of the movable sliding block completely leaves the flow outlet hole so as to alternately limit the through-flow section of the flow outlet hole. By the adoption of the scheme that the movable sliding block is arranged in the vortex cavity, the movable sliding block is driven by vibration of the vortex cavity to reciprocate, and therefore the through-flow area of a flow inlet channel is changed, the vibration amplitude of the vortex cavity is increased, the vibration frequency is reduced, and then the vibration form meeting the underground construction requirement is obtained, namely the proper amplitude and vibration frequency are obtained. According to the structure of the lower oscillation sliding vane jet flow stroke-increasing hydraulic oscillator, the number of movable components is small, the service life is long, the pressure loss of a drive component is extremely low, and the output efficiency is high.

The invention relates to a drain switch and a urine collection bag using the drain switch. The drain switch comprises a valve body and a valve core. The valve body comprises a vertical passage for discharging liquid and a transverse passage communicating with and intersecting with the vertical passage. The valve core is a piston guided to be inserted in the transverse passage. The piston is provided with a liquid flow passage for forming a valve port. The flow area of the liquid flow passage is changed from small to large in an opening movement direction of the piston to make the liquid flow amount change from small to large when the piston is opened. A coil spring is disposed between the inner end surface of the piston and the corresponding end of the transverse passage. The coil spring is used for applying an acting force to the piston to move the piston toward a closed position. With the above technical scheme, the change of the flow area when the piston is opened can be realized bychanging the flow area of the liquid flow passage, thereby realizing the change of the liquid flow amount from small to large, and compared with the prior art, the drain switch is capable of better control of liquid flow rate in the early stage when the piston is opened and avoiding splashing of liquid.

The invention provides an oscillating sliding vane jet flow stroke-increasing hydraulic oscillator. A vortex cavity is fixedly arranged in an outer sleeve and used for generating vibration; a flow inlet hole is formed in one end of the vortex cavity, and a flow outlet hole is formed in the other end of the vortex cavity and located in the circle center of the vortex cavity; a sliding groove is formed in the inlet end of the flow inlet hole or the inlet end of the flow outlet hole; a movable sliding block is installed in the sliding groove in a sliding manner; one end of the stroke of the movable sliding block partially covers the flow inlet hole or the flow outlet hole, and the other end of the stroke of the movable sliding block completely leaves the flow inlet hole or the flow outlet hole so as to alternately limit the through-flow section of the flow inlet hole; and leaf springs are arranged on the two sides of the sliding groove and connected with the movable sliding block. By theadoption of the scheme that the movable sliding block is arranged in a flow inlet channel or the vortex cavity, the movable sliding block reciprocates through vibration of the vortex cavity, and therefore the through-flow area of the flow inlet channel or a flow outlet channel is changed, the vibration amplitude of the vortex cavity is increased, the vibration frequency is reduced, and then the vibration form meeting the underground construction requirement is obtained, namely the proper amplitude and vibration frequency are obtained.

The invention provides an HP type coal mill. The HP type coal mill comprises a static ring, a nozzle ring mounting cavity, a rotary nozzle ring and a first protection plate, wherein the static ring comprises an upper annular expanding cylinder, a vertical cylinder and a lower annular expanding cylinder, and the vertical cylinder is connected with the upper annular expanding cylinder and the lower annular expanding cylinder; the coal mill is provided with the cylindrical nozzle ring mounting cavity, and the axis of the nozzle ring mounting cavity is vertical; the rotary nozzle ring is arranged in the nozzle ring mounting cavity, the rotary nozzle ring can rotate along the axis of the rotary nozzle ring, and a plurality of blades are uniformly distributed on the peripheral surface of the rotary nozzle ring in the circumferential direction; and the first protection plate is an expanding annular plate, the first protection plate is attached to the inner wall face of the upper annular expanding cylinder and fixedly connected with the upper annular expanding cylinder, and the first protection plate protects the upper annular expanding cylinder. According to the coal mill, the discharge amount of pebble coal is reduced, the performance of the coal mill is improved, meanwhile, the abrasion of the annular expanding cylinder and the abrasion of a shell are obviously reduced, the overhaul period is prolonged, and the maintenance cost is reduced.