7365results about "Piston pumps" patented technology

The invention belongs to the technical field of motor control, and discloses a control method of a motor for an inverter compressor, which comprises the following steps: embedding a distributed thermocouple array in a motor stator slot to acquire temperature data of the motor, synchronously acquiring operation parameters of the motor, generating a dynamic thermal field characteristic spectrum through a data fusion algorithm, coordinates of the hot spot areas with the temperature abnormally increased are marked, a dynamic correlation model is established, and heat conduction characteristic parameters in the dynamic correlation model are updated through a sliding window algorithm; outputting a predicted temperature rise curve through the dynamic correlation model, adjusting a PWM control strategy of the inverter, inputting the PWM control strategy to a motor driving unit to execute preliminary regulation and control, collecting feedback data to generate a multi-dimensional feedback feature vector, iteratively optimizing a combined weight of a switch interval compensation amount and a harmonic injection strategy through a gradient descent algorithm, and performing harmonic injection control. And a global optimal strategy considering the heat dissipation efficiency and the operation stability is formed, and the operation stability and the energy efficiency level of the inverter compressor under various working conditions are remarkably improved.

A pump system includes a housing defining a first internal volume and a second internal volume, a first piston positioned to separate the first internal volume into a first chamber and a second chamber, a second piston positioned to separate the second internal volume into a third chamber and a fourth chamber, a first inlet check valve configured to permit fluid flow into the first chamber, a second inlet check valve configured to permit fluid flow into the third chamber, a directional control valve (DCV) repositionable between (a) a first position where the DCV is configured to fluidly couple the second chamber to a high pressure fluid source and (b) a second position where the DCV is configured to fluidly couple the fourth chamber to the high pressure fluid source, and a relief valve configured to supply a fluid to the DCV through an orifice to move the DCV.

A portable electric inflator includes: a core assembly including a motor and an air compressing mechanism, the motor configured to drive the air compressing mechanism to compress and discharge air; a housing defining a receiving space for accommodating the core assembly, and having an external surface that defines a display receiving hole and a number of through holes communicating with the receiving space; a cloth in full contact with and covering the external surface of the housing, the cloth defining an opening, an edge of the opening extending from a junction of the display receiving hole and the external surface of the housing into the housing, forming a side surface covering portion that is in contact with an inner side surface of the display receiving hole; and a display received in the display receiving hole, the display comprising a lateral surface abutting against the side surface covering portion.

Systems and methods disclosed herein include a portable air pump and inflator system comprising an electric air compressor, a compressor housing enclosing the electric air compressor, an air hose attached or attachable to an air outlet of the electric air compressor, and a housing base attached to the compressor housing. The housing base comprises a rigid base portion that is attached to the compressor housing and a plurality of flexible foot extensions that extend from the rigid base portion. The flexible foot extensions are configured to support the portable air pump and inflator system on a surface and dampen vibrations caused by the operation of the electric air compressor.

The present invention provides a composite multi-compression mechanism vacuum pump with a high compression ratio and high pumping speed. The multi-compression mechanism includes three types: a turbine, a traction wheel, and a vortex blade array. The traction wheel is divided into a first-stage traction wheel and a second-stage traction wheel. A first-stage exhaust port and a second-stage exhaust port are respectively provided on the base, and a valve is provided on the first-stage exhaust port. In the first pumping stage, the valve is opened, and most of the gas flows through the turbine and the first-stage traction wheel and is discharged from the first-stage exhaust port. A small part of the gas flows through the turbine, the first-stage traction wheel, the second-stage traction wheel, and the vortex blade array in sequence and is discharged from the second-stage exhaust port. In the second pumping stage, the valve is closed, and the gas flows through the turbine, the first-stage traction wheel, the second-stage traction wheel, and the vortex blade array and is discharged from the second-stage exhaust port. The present invention solves the problem that high pumping speed and high vacuum cannot be achieved at the same time and that the molecular pump must be equipped with a pre-stage pump by using multiple compression mechanisms in series. The present invention can replace a traditional set of multiple vacuum pumps with a single vacuum pump, significantly reducing costs.

Systems and methods are provided for a portable air compressor comprising an electric battery, an electric motor, a piston, and an air hose. The electric motor is powered by the electric battery. The piston is coupled to and driven by the electric motor. The piston is configured to compress air within a piston cylinder. The air hose has a first end attachable to an air outlet of the piston cylinder and a second end attachable to an inflatable object. The portable air pump is configured to inflate the inflatable object to a target air pressure. When the target air pressure is below a predetermined pressure threshold, the portable air pump inflates the inflatable object at a first inflation rate. When the target air pressure is above the predetermined pressure threshold, the portable air pump inflates the inflatable object at a second inflation rate greater than the first inflation rate.

A reversible hydraulic pump for setting the pitch of a propellor of a turboprop can include two barrels connected by a transmission shaft. The first and second barrels are connected to the transmission shaft via first and second clutch means so that, when the transmission shaft rotates in a first direction, only the first barrel is rotated by the transmission shaft, and so that, when the transmission shaft rotates in a second direction opposite to the first direction, only the second barrel is rotated by the transmission shaft.

The invention discloses an antifouling self-cleaning line column type porcelain insulator and a detection method thereof, and relates to the field of insulators, a connecting bin is provided with a positioning rotating member, two ends of a movable sleeve block are provided with one-way drawing units connected with a piston rod, and a gas storage bin is provided with a rotating exhaust member. By arranging a position adjusting rotating part, a rotating exhaust part and a one-way pulling unit, when wind blows a fan blade plate, a reversing bevel gear can drive a transmission shaft to rotate clockwise so as to enable a reciprocating lead screw to rotate clockwise, and when a transmission gear ring rotates anticlockwise, the reversing bevel gear drives the transmission shaft to rotate clockwise so as to enable the reciprocating lead screw to rotate anticlockwise so as to enable the reciprocating lead screw to rotate anticlockwise. Therefore, when the second pawl rotates, the reciprocating screw rod rotates clockwise all the time, one-way rotation of the reciprocating screw rod can be achieved, then the rotating exhaust part and the one-way pulling unit are matched, the surface of the insulator body can be cleaned through airflow, and the self-cleaning effect is achieved.

Disclosed in the present invention are a fuel cell integrated with a heat pump energy recovery system, and an energy recovery control method. The main features are that: a heat pump system is arranged between a cooling system and an air supply system, and after absorbing waste heat in the cooling system, the heat pump system heats exhaust tail gas discharged by a cell stack module, so as to increase the temperature of exhaust tail gas entering an expander, thereby improving the energy recovery efficiency of the expander. The heat pump system has a simple structure, and an energy recovery strategy is reasonable, thereby greatly simplifying the structure of the energy recovery system of the fuel cell, reducing manufacturing costs, and eliminating the risk of temperature runaway.

The invention relates to the technical field of power electronic driving control, in particular to a driving system and method for an ultrasonic air pump, and the system comprises a control signal generation module which is used for generating a control signal; the voltage superposition driving module is coupled to the control signal generation module and is used for superposing and lifting the driving voltage according to the control signal and executing reversing operation, and the reversing operation comprises forward driving and reverse driving; the driving frequency adjusting module is coupled to the control signal generating module and is used for adjusting the driving frequency and speed of the ultrasonic air pump based on the control signal; and the working circuit protection module is coupled to the voltage superposition driving module and is used for setting dead time between forward driving and reverse driving to prevent short circuit. According to the invention, the dependence of the ultrasonic air pump on an independent high-voltage power supply and how to realize high-voltage alternating driving through voltage superposition and avoid the risk of bridge arm direct connection and resonance mismatch under the constraint of a low-voltage power supply are effectively solved.

The invention provides a combustion drive circulating gas-lift pressurizing all-in-one machine, and belongs to the technical field of natural gas production. Comprising a pressurization exhaust system, a gas lift pressurization system, a sewage discharge system, a pressure stabilizing system, a combustion drive multi-stage compression system and a base, and the pressurization exhaust system, the gas lift pressurization system, the sewage discharge system, the pressure stabilizing system and the combustion drive multi-stage compression system are all installed on the base. By arranging the pressurization exhaust system and the gas lift pressurization system, the device can perform gas lift and pressurization operation in an oil field, one machine has two purposes, by arranging the combustion drive multi-stage compression system, efficient dispatching of an oil and gas field circulation gas lift pressurization site is achieved, powerful guarantee is provided for development of the dual-carbon industry, and meanwhile, the device has good application prospects. By arranging the purification assembly, the natural gas in the well rises, so that the purity of the extracted natural gas is improved, and the problems that an existing gas lifting and pressurizing all-in-one machine is high in use cost and poor in effect are solved.

The invention discloses a salt cavern gravity compressed air energy storage system which comprises a salt cavern, a vertical shaft is vertically formed in the top of the salt cavern and communicated to the ground surface, a sealing film is arranged on the side wall of an inner cavity of the salt cavern and divides the salt cavern into a water storage cavity and an air storage cavity, and the bottom of the air storage cavity is connected with one end of an air pipe. A piston is arranged in the vertical shaft, a gravity block is arranged at the top of the piston, a water pipe communicated with the water storage cavity is arranged at the bottom of the water storage pool, and a water conservancy generator set is arranged on the water pipe. Liquid gravity is matched with salt cavern gas storage, liquid can be matched with the irregular shape of a salt cavern, construction is reduced, energy density is increased, construction difficulty can be reduced through ground surface construction, the problem that a traditional compressed air energy storage system is large in investment cost is solved, and meanwhile the problem that salt cavern resources are reused is solved.

The invention relates to a reciprocating compressor. The reciprocating compressor may include a housing, a drive motor, a drive shaft, a piston, a cylinder, a valve plate, a suction valve, and a suction valve stopper, and the suction valve stopper composed of an elastic member may be disposed between the suction valve and the cylinder to support a reed valve portion of the suction valve to limit an opening degree of the reed valve portion. Therefore, the opening degree of the suction valve can be sufficiently ensured, so that not only can the cooling force in a high-load operation region be improved, but also dead volume can be prevented in advance, and then the energy efficiency in a low-load operation region and / or a high-load operation region can be improved.

The invention discloses an offshore multi-energy combined supply system based on constant-pressure compressed carbon dioxide energy storage and an operation method of the offshore multi-energy combined supply system. The system comprises a working medium storage device, a heat energy storage device, a charging process module, a gas-liquid conversion loop, a discharging process module, a cold energy supply module and a heat energy supply module. By improving the energy release process structure of the compressed carbon dioxide energy storage system, the pressure of high-pressure carbon dioxide is reduced to normal pressure after primary expansion, so that low-temperature cold energy is generated while power is generated, consumption of stored heat is saved, residual stored heat is used for heat supply, the comprehensive utilization rate of energy is increased, and combined supply of cooling, heating and power is achieved; the system further comprises an integrated thermally-driven combined cooling and power supply subsystem capable of switching power generation / refrigeration modes, organic Rankine cycle and jet refrigeration cycle are highly integrated, investment cost and space occupation are reduced, redundant heat energy is flexibly and efficiently converted into electric energy or cold energy, and the flexibility of multi-energy combined supply of the system is improved.

The invention provides an oil baffle structure, a rotor assembly, a motor and a compressor, the oil baffle structure is used for cooperating with a rotor core for use, and the rotor core is provided with a circulation hole which partially generates backflow when operating at a first rotating speed; the oil blocking structure comprises a movable blocking piece, and the movable blocking piece is used for being connected with the rotor iron core so as to be driven by the rotor iron core to rotate together and move to a first position relative to the rotor iron core when the rotor iron core operates at a first rotating speed. At the first position, the movable blocking piece blocks at least part of the circulation holes where backflow occurs. According to the technical scheme of the invention, as the movable blocking piece can block the circulation hole where backflow occurs when the rotor iron core operates at the first rotating speed such as high speed, the circulation area of the backflow circulation hole can be reduced, backflow is reduced, and the oil spitting rate of the compressor is reduced.

The invention relates to a fluid compression apparatus having a plurality of compression stages, comprising a first compression chamber, a second compression chamber, an intake system communicating with the first compression chamber which is configured to allow fluid to be compressed into said first compression chamber, a transfer system configured to allow in an open position the transfer of fluid from the first compression chamber to the second compression chamber, a mobile piston for ensuring the compression of the fluid in the first and second compression chambers. The apparatus further comprises a discharge port which communicates with the second compression chamber and is configured to allow the exit of compressed fluid, the piston being translationally mobile in a longitudinal direction, wherein the first compression chamber is defined by a fixed lower cavity, a lower end of the piston and a first sealing system formed between the piston and a wall of the cavity, wherein the second compression chamber is defined by a fixed upper cavity, an upper end of the piston and a second sealing system formed between the piston and a wall of the upper cavity. The invention is characterized in that, in the operating configuration of the apparatus, the longitudinal direction of translation of the mobile piston is vertical, the intake system being located at a lower end of the apparatus and the discharge port being located in an upper part of the apparatus above the transfer system.

The invention discloses a piston type compressor driven by liquid pressure, which is characterized in that hydraulic and gas compression components are integrated in a cylinder body, a crankshaft rotates to drive a hydraulic piston, then a gas piston is driven by utilizing the characteristic that liquid cannot be compressed, the upper part of the gas piston is filled with sealing liquid, a gap of a sealing ring is filled, and gas leakage is reduced. According to the structure, lubricating and hydraulic media can be combined into a whole, hydraulic oil is stored through the crankcase and serves as the lubricating media, and the equipment size is further reduced in the mode that an oil pump is arranged inside. And meanwhile, a multi-stage compression form can be combined, so that the discharge pressure is further improved. The invention can be used for high-pressure hydrogen filling piston type compressors of gas stations and energy storage stations, and can also be used in the field of other high-pressure and ultrahigh-pressure gas compressors.

The invention provides a self-adaptive volume-variable intelligent air compressor and a control system thereof, and relates to the technical field of air compressors. The control system comprises a multi-source heterogeneous sensing fusion module, a dynamic manifold optimization control module, a quantum probability fault pre-judgment module, a cross-domain energy cooperative scheduling module, a distributed self-organizing communication module and a self-adaptive meta-evolution module. And a grey Markov chain model and a wavelet decomposition-support vector machine are combined to accurately predict the real-time electricity price and the factory gas consumption load. And according to the predictions, the operation mode of the air compressor is intelligently adjusted through dynamic game equilibrium and a multi-target differential evolution algorithm. In the low ebb period of the electricity price, the operation load is automatically increased by 30%-40%, and meanwhile the gas storage capacity is increased by 25%-35%; and in the peak period of electricity price, stored gas is reasonably released, and the operation load is reduced by 20%-30%. And energy waste caused by unreasonable operation is effectively avoided.

A counterflow guide includes a body with a first end surface, a second end surface positioned opposite the first end surface, and a sidewall connecting the first end surface to the second end surface. The counterflow guide also includes a discharge passage configured to direct a fluid to discharge through the body, from a discharge inlet to a discharge outlet. The discharge inlet is formed in the sidewall and the discharge outlet is formed into the first end surface.

A vehicle having an air compressor, an air storage tank and a sensor is disclosed. The air compressor may supply compressed air to the air storage tank, and the air storage tank may supply the compressed air to an external tool. The sensor may be configured to receive information associated with the external tool and send the information to a vehicle processor. The processor may determine tool specification and expected tool usage characteristics based on the information associated with the external tool. The processor may further calculate a target pressure of compressed air in the air storage tank based on the tool specification and the expected tool usage characteristics. Furthermore, the processor may cause air compressor operation to fill the air storage tank with the compressed air at the target pressure.

The invention belongs to the technical field of oil and gas exploitation and pressurized transportation, and discloses a lead screw driven rodless reciprocating type single-action electric submersible pump and a control method. The electric pump is characterized in that a working cavity is formed between a plunger and an upper working cavity end cover, and a lower cavity is formed between the plunger and a lower cavity end cover; the plunger does reciprocating motion in the working cavity to finish suction and discharge of liquid; the lower working cavity end cover is installed at the bottom of the cylinder body, and a lead screw is fixed to the lower working cavity end cover and connected with the plunger. The lead screw is connected with a motor. The plunger is driven by the lead screw to reciprocate in the cylinder body, and suction and discharge of liquid and control and continuous conveying of liquid in a working cavity are sequentially completed in the up-down stroke of the plunger by means of one-way opening and closing of the liquid inlet valve and the liquid discharge valve. The lead screw driving rodless reciprocating type single-action electric submersible pump is higher in efficiency under the complex well condition. The optimized reciprocating type driving mechanism can achieve efficient one-way conveying, the sealing design can prolong the service life of equipment, and the maintenance cost is reduced.

The invention discloses a distributed energy system based on a gas turbine and a compressed air energy storage technology, and belongs to the technical field of distributed energy systems, the distributed energy system comprises a gas turbine unit, a filter, a combustion part arranged at the downstream of the filter, and a heat exchange part arranged at the downstream of the combustion part; the compression energy storage unit comprises a compression part arranged at the downstream of the filter and a first heat exchanger connected between the gas turbine unit and the compression energy storage unit; the system further comprises two heat sources, three cold sources and two power sources. According to the distributed energy system based on the gas-air combined cycle, the gas turbine system and the energy storage system can operate independently, and can operate in a coupling mode at the peak of electricity utilization. The whole system has the combined cooling heating and power supply function and the electric energy storage function, the problem of flexible regulation and control of the cooling heating and power proportion in a conventional CCHP system can be solved, and the efficiency of a conventional compressed air energy storage system can be improved.

The present invention relates to the technical field of hand pump, in particular to a novel single-material hand pump, which includes a pressure head, a valve stem, an elastic part and a cylinder, wherein the bottom of the pressure head is fixedly connected with the valve stem, the cylinder is arranged at the bottom of the valve stem, the valve stem is connected with the cylinder in an embedded way, not only the elliptical columns contract uniformly under pressure and have good resilience, but also the elastic part is made of elastoplastic, the separate removal of metal spring is not required for saving the treatment time and improving the environmental protection, and the air holes are used for absorbing or discharging the compressed air inside the elastic part, thereby solving the problems of internal negative pressure, failure to reset the elastic part and retract the elastic part.

The invention relates to the technical field of transmission pumps, and discloses a cam transmission pump. The cam transmission pump comprises a plunger assembly and a first driving assembly, and the plunger assembly is provided with a plunger rod reciprocating in the first direction; the first driving assembly comprises a first driving part and a cam, the first driving part is in driving connection with the cam and can drive the cam to rotate, the end of the plunger rod is slidably connected to the outer contour of the cam, the outer contour of the cam comprises an acting section and a reset section which are connected end to end, and the acting section is used for driving the plunger rod to move in the direction away from the cam. The reset section is used for driving the plunger rod to move in the direction close to the cam, and the radian of the acting section is larger than that of the reset section. Due to the fact that the radian of the acting section is larger than that of the reset section, the acting duty ratio of the cam is larger than 50%, and the energy utilization rate is improved. Through cam transmission, rotary driving of the first driving piece is converted into linear reciprocating motion of the plunger rod, and the duty ratio of acting is increased.

An adding system for fire-extinguishing units includes a motor, which can be driven by an extinguishing agent stream, an adding pump, which can be driven by the motor, an adding line, and an extinguishing agent additive line. The outer wall of the working chamber of the motor is in the form of a rotation motor, which can also have the shape of a logarithmic spiral. Furthermore, the wall of the drainage housing of the motor, which is in the form of a rotation motor, can have a through-slot for letting the extinguishing agent in and / or out. Moreover, the inlet of the adding pump can be arranged such that the extinguishing agent additive can flow into the adding pump substantially parallel to the movement direction of the pistons of the adding pump. Finally, the adding pump can have an integrated relief valve.

The utility model relates to the technical field of pneumatic control, solves the problem that in the prior art, work of a double-air-source pneumatic pump needs to completely depend on a power source, and discloses an automatic air source switching device and a double-air-source pneumatic pump control system.The automatic air source switching device comprises a pump air source control device, and the pump air source control device comprises a first valve body and a second valve body; the pneumatic timing device comprises a driving shaft and a driven shaft, a driving blade is installed at one end of the driving shaft, an air injection device is arranged on one side of the driving blade, airflow or compressed air provided by an air source is used for driving a pneumatic timer, and then the pneumatic timer is used for driving position switching of the first valve element and the second valve element. The purpose of regularly switching the driving air sources of the double-air-source pneumatic pump is achieved, so that the purpose of regularly switching the driving air sources of the double-air-source pneumatic pump can be achieved under the condition that power is not supplied through a power source.

The present invention discloses an air pump, which aims to improve the convenience, accuracy and user experience of inflation operation; the air pump adopts a compact design, is equipped with a standardized inflation interface and a variety of air nozzle adapters to meet different inflation needs; a high-precision roller adjustment mechanism realizes intuitive and accurate adjustment of the air pressure value, and the user can easily reach the required air pressure level by rotating the roller; at the same time, the device also integrates LED emergency lighting and a high-definition LED display to provide nighttime lighting and real-time air pressure feedback functions; in addition, the roller adjustment mechanism and microprocessor control unit made of wear-resistant materials ensure the long-term stability and durability of the equipment and reduce maintenance costs. The air pump of the present invention is suitable for various scenarios such as daily household use, car maintenance, outdoor sports, etc., has broad market prospects and application value, and provides users with efficient, convenient and safe inflation solutions.

One purpose of the present invention is to provide a combination device that contributes to the miniaturization of vehicle air conditioning systems and the like, and that can ensure the cooling capacity (heat dissipation) of a switching element that converts direct current to alternating current. The combination device (1) with a refrigerant compression function and a heating medium function comprises: a first housing (2A) that accommodates a compression mechanism (3) for compressing a refrigerant and an electric motor (4) for driving the compression mechanism (3) in series; a second housing (2B) that accommodates the electric heater (5) for heating a heating medium; and a third housing (2C) that accommodates the motor drive circuit (20) and the heater control circuit (30).The first power switching elements (Q1 to Q6) of the motor drive circuit (20) are arranged in the third housing (2C) such that they can be cooled by a refrigerant flowing from the refrigerant inlet (8) into the first housing (2A) and by a heating medium flowing from the heating medium inlet (10) into the second housing (2B).

To suppress hydrogen concentration in surrounding atmosphere to a determined reference value or less by detecting a change in the hydrogen concentration if liquefied hydrogen leaks.SOLUTION: A liquefied hydrogen pump system includes a liquefied hydrogen pump and a control device, and the liquefied hydrogen pump includes a cylinder, a piston, a rod, a drive part, and a seal part. The seal part includes a first seal member, a second seal member provided with an interval in the direction of separating from the piston an axial direction with respect to the first seal member, a flow passage part, one end of which communicates with a gap between the rod and the cylinder and the other end of which opens to the outside of the cylinder, and an information acquisition part for acquiring information on hydrogen concentration in a fluid flowing to the outside of the cylinder through the flow passage part. The control device stops the operation of the liquefied hydrogen pump in the case of determining that hydrogen concentration in the fluid exceeds a preset reference value on the basis of information on the acquired hydrogen concentration.SELECTED DRAWING: Figure 2