28 results about "Capacity control" patented technology

The invention provides a productivity control system and control method based on air volume and air pressure of a pulverizer system, and is applied to the technical field of material pulverizing, the productivity control system comprises an abnormity monitoring module, and the abnormity monitoring module comprises a screen abnormity monitoring unit and a low-efficiency operation monitoring unit; the screen abnormity monitoring unit is used for judging whether the screen has a blocking trend or not, and if the screen has the blocking trend, the blocking trend is fed back to the capacity adjusting module so as to reduce the feeding amount of the crusher; the low-efficiency operation monitoring unit is used for judging whether the pulverizer has a low-efficiency operation condition or not, and if the pulverizer has the low-efficiency operation condition, the low-efficiency operation condition is fed back to the capacity adjusting module to increase the feeding amount of the pulverizer; and the abnormity monitoring module judges whether a screen of the crusher has a blocking trend according to the real-time data acquired by the data acquisition module, on the basis of ensuring that the screen is not blocked, the minimum airflow required by crushing and transportation is kept, a motor of the crusher operates at the maximum load at the moment, and the feeding amount of the crusher is adjusted to realize the maximum productivity.

The application provides a wind farm backup frequency modulation capacity control method, a control device, a system and equipment. First, a dispatching instruction issued by a wind farm control center is received and the wind speed of each wind turbine is obtained. Then, the load shedding mode of each wind turbine is determined according to the wind speed of each wind turbine. The load shedding mode of the wind turbine with the wind speed less than a first preset threshold is an overspeed load shedding mode, and the load shedding mode of the wind turbine with the wind speed greater than a second preset threshold is a low-speed load shedding mode. The second preset threshold is greater than or equal to the first preset threshold. Meanwhile, the load shedding power of each wind turbine is determined according to the wind speed of each wind turbine and the dispatching load shedding power indicated by the dispatching instruction. Finally, the load shedding of each wind turbine is realized according to the load shedding mode and the load shedding power of each wind turbine. By matching the low-speed load shedding mode for the high-speed wind turbine, compared with the variable pitch control of the prior art, the response speed can be improved, the wind turbine can be quickly adjusted to the backup capacity, and therefore the practicability of the control strategy is improved.

A variable capacity compressor reduces the inflow of foreign matter into a capacity control valve that controls the discharge capacity of a refrigerant. A swash plate compressor (100), which is an example of a variable capacity compressor, is provided with: a suction chamber (150); the compression mechanism is used for compressing a refrigerant therein; a discharge chamber (152) through which the refrigerant compressed by the compression mechanism is discharged; a crank chamber (110) for changing the state of the compression mechanism according to the internal pressure; a capacity control valve (200) that is disposed in a pressure supply passage (156) that connects the discharge chamber (152) and the crank chamber (110), and that controls the discharge capacity of the refrigerant by changing the internal pressure of the crank chamber (110) by increasing and decreasing the flow rate of the refrigerant supplied from the discharge chamber (152) to the crank chamber (110); a filter (210) attached to the periphery of the plurality of introduction ports of the capacity control valve (200); and a direction changing member that changes the supply direction of the refrigerant supplied from the tip opening of the pressure supply passage (156) to the capacity control valve (200).

This invention relates to the field of centrifuge unit technology and discloses a capacity control method for a series centrifuge unit, including a startup phase: the high-stage suction guide vane operates according to the set minimum opening degree XL, and the low-stage suction guide vane operates according to the set minimum opening degree YL; when the outlet water temperature SP > the target temperature SV+Ta, the unit obtains the opening degree X of the high-stage suction guide vane through PID calculation and outputs the opening speed of the high-stage suction guide vane to the high-stage compressor, and the opening degree Y of the low-stage suction guide vane follows the opening degree X of the high-stage suction guide vane; otherwise, S40 is executed; when the outlet water temperature SP ≤ the target temperature SV+Ta, or the interruptor control time ≥ tc, S40 is executed; otherwise, S20 is executed; capacity PID control: the opening degree of the low-stage suction guide vane follows the opening degree of the high-stage suction guide vane. This invention effectively solves the problem of capacity and air volume mismatch when different series compressors are used together.

The invention relates to the technical field of centrifugal units, and discloses a tandem centrifugal unit capacity control method which comprises the following steps: a starting stage: a high-section air suction guide vane operates according to a set minimum opening XL of the high-section air suction guide vane, and a low-section air suction guide vane operates according to a set minimum opening YL of the low-section air suction guide vane; when the water outlet temperature SP is larger than the target temperature SV + Ta, the unit obtains the opening degree X of a high-section air suction guide vane through PID operation and outputs the opening speed of the high-section air suction guide vane to a high-section compressor, and the opening degree Y of a low-section air suction guide vane follows the opening degree X of the high-section air suction guide vane; if not, executing S40; when the outlet water temperature SP is smaller than or equal to the target temperature SV + Ta, or the control time of the interrupter is larger than or equal to tc, S40 is executed; otherwise, executing the step S20; and carrying out capacity PID control, wherein the opening degree of the low-section air suction guide vane follows the opening degree of the high-section air suction guide vane. The problem that the capacity and the air volume are not matched when different series of compressors are used in a mixed mode is effectively solved.

Provided is a connector structure of a stepless capacity control actuator of a reciprocating compressor including an ejector rod configured to transfer power provided by a driving structure to an unloader. The connector structure includes a housing sleeving the ejector rod, a connecting member including a flange part and a sleeve part, and a sealing assembly including a first end face sealing ring, a second end face sealing ring, a first seal ring and an oil leakage joint. A first side of the flange part is connected with a second end of the housing and a second side of the flange part is configured to connect with the driving structure. A second oil hole is formed in the sleeve part and in butt joint with a first oil hole. The oil leakage joint is connected to the first oil hole.

The invention provides a hybrid power ship energy recovery and optimization method and a control system. The method is used for balancing recovery schemes and carrying out optimization control according to the recovery schemes. The electric power system structure of the hybrid power ship is converted into knowledge which can be understood by an expert system through the directed graph theory, the overall reliability index of the electric power system recovery scheme is defined based on the directed graph theory, and the decision of balancing the electric power system recovery scheme is participated. Factors, such as power line transmission efficiency, switching operation times, switching operation time, distance, line reliability and overall reliability of a recovery scheme, influencing hybrid power ship power system fault recovery are calculated through a target function to participate in balancing of the recovery scheme. Furthermore, according to a capability control method with nonlinear model predictive control as a core, cost function design is carried out on a balanced recovery scheme with fuel consumption and power of a power generation device as core indexes, and energy optimization control is carried out.

The utility model discloses an oxidation purification system of a nuclear power unit, which comprises a system interface, a first pressure regulating valve, a capacity control box, a charging pump, a low-pressure discharge pipeline, a purification pipeline, a charging pipeline and a bypass pipeline, the two ends of the purification pipeline are connected to the first pressure regulating valve and the capacity control box respectively, and the two ends of the charging pipeline are connected to the capacity control box and the charging pump respectively. According to the nuclear power unit oxidation purification system, the system structure is optimized through redundancy design, the safety and reliability of system operation and the maintainability of the system are guaranteed, part of equipment can adapt to the hydraulic characteristics and operation requirements of the improved system after being redesigned, the purification flow can be improved, the overhaul period can be shortened after optimization, and the maintenance cost is reduced. The economic benefit is obvious.

The invention provides a carbon loading capacity control method and device of an integrated oxidation trap and a vehicle, and relates to the technical field of vehicle aftertreatment, the current carbon loading capacity of the DDPF is calculated by collecting the pressure difference between the two ends of a tail gas inlet port and a tail gas outlet port of the DDPF and the volume flow of waste gas flowing into the DDPF, and meanwhile the current carbon loading capacity of the DDPF is calculated on the basis of the average temperature of the DDPF. And determining a temperature coefficient of the integrated oxidation trap, and triggering DDPF regeneration to control the carbon loading capacity when the temperature coefficient is within a preset range and the current carbon loading capacity exceeds a preset carbon loading capacity threshold value. According to the method, the carbon loading capacity and the temperature coefficient serve as the basis for triggering DPF active regeneration, the purpose of improving the carbon loading capacity judgment accuracy is achieved, the technical problem that in the prior art, DPF regeneration control is low in accuracy is solved, and then the technical effect of improving the DPF regeneration control accuracy is achieved.

A variable capacity compressor reduces the inflow of foreign matter into a capacity control valve that controls the discharge capacity of a refrigerant. A swash plate compressor (100), which is an example of a variable capacity compressor, is provided with: a suction chamber (150); a compression mechanism which sucks the refrigerant therein and compresses the refrigerant therein; a discharge chamber (152) through which the refrigerant compressed by the compressor is discharged; a crank chamber (110) for changing the state of the compression mechanism according to the internal pressure; and a capacity control valve (200) disposed in a pressure supply passage (156) that connects the discharge chamber (152) and the crank chamber (110). The capacity control valve (200) has a plurality of introduction ports, and controls the discharge capacity of the refrigerant by changing the internal pressure of the control pressure chamber (110) by increasing and decreasing the flow rate of the refrigerant supplied from the discharge chamber (152) to the control pressure chamber (110). In addition, the cross-sectional area of the pressure supply passage (156) that opens into the discharge chamber (152) is larger than the total cross-sectional area of the plurality of introduction ports of the capacity control valve (200).

The application provides a method and product for train resource and warehouse coordination configuration in rail transit scheduling, breaks through the existing scheduling mode mainly based on fixed operation diagram or simple train level planning, and cooperatively realizes response of station passenger flow demand, train turnaround transportation and warehouse capacity control, generates a potential train set adapted to the space-time characteristics of station passenger flow by taking station passenger flow as a driving force, and cooperatively verifies the occupation, recovery and warehouse operation of train resource through train connection relationship variable, so that the obtained scheduling result not only meets the passenger flow demand at the train level, but also has engineering executability at the train and warehouse level, fundamentally avoids the problem of mutual fragmentation between train operation plan and train resource configuration and warehouse capacity, and the obtained train operation plan and train scheduling plan have engineering implementability.

The present invention provides a capacity control valve having a fluid discharge function at startup and high operating efficiency. The capacity control valve (V) comprises: a valve housing (10) having a discharge port (12) for a discharge fluid of a discharge pressure (Pd) passing therethrough, a suction port (15) for a suction fluid of a suction pressure (Ps) passing therethrough, and control ports (13, 14) for a control fluid of a control pressure (Pc) passing therethrough; a rod (52, 54) driven by a solenoid (80); and a main valve (50) composed of a main valve seat (10a) and a main valve core (51), and The movement of (52, 54) opens and closes the connection between the discharge port (12) and the control port (13), wherein the capacity control valve (V) comprises: a CS valve (56) which opens and closes the connection between the control fluid and the intake fluid by the movement of the rod (52, 54); and a force applying unit (91) which applies force to the main valve core (51) and the rod (52, 54) in opposite directions to each other, and the main valve core (51) and the rod (52, 54) are configured to be able to move relative to each other in the axial direction.

The present invention provides a capacity control valve having a fluid discharge function at startup and high operating efficiency. A capacity control valve (V) comprises: a valve housing (10); a main valve (50) which is composed of a valve core (51) driven by a solenoid (80) and a main valve seat (10a) provided between a discharge port (12) and a control port (14) and capable of being contacted by the valve core (51); and a pressure-sensitive valve component (52) which, together with a pressure-sensitive body (60) arranged in a pressure-sensitive chamber (40), constitutes a pressure-sensitive valve (53) which can discharge fluid by opening and closing the pressure-sensitive valve (53). The intermediate connecting passage (55) connects the control port (14) with the suction port (13), wherein a through hole (52d) connected to the intermediate connecting passage (55) is formed on the pressure-sensitive valve component (52), and a sliding valve core (90) is provided. The sliding valve core slides relative to the pressure-sensitive valve component (52) to open and close the through hole (52d), and a force applying unit (91) is provided on the outer diameter side of the sliding valve core (90) to apply force to the sliding valve core (90) in the opening direction.

The present disclosure relates to a control system (200; 300; 400; 500) for controlling an air handling device (101) comprising a temperature control component (102) and a adsorption capacity control component (103); wherein the control system comprises a multi signal controller (210) for control of the temperature control component (102) and the adsorption capacity control component (103) of the air handling device (101), and wherein said multi-signal controller (210) comprises a feed forward component (211) arranged to determine control signal values for use in control of the temperature control component and the adsorption capacity control component of the air handling device based on sensor data relating to a measured quantity at the air handling device.

An improved variable geometry diffuser (VGD) mechanism for use with a centrifugal compressor. This VGD mechanism extends substantially completely into the diffuser gap so that the VGD mechanism may be used more fully to control other operational functions. The VGD mechanism may be used to minimize compressor backspin and associated transient loads during compressor shut down by preventing a reverse flow of refrigerant gas through the diffuser gap during compressor shutdown, which is prevented because the diffuser gap is substantially blocked by the full extension of the diffuser ring. During start-up, transient surge and stall also can be effectively eliminated as gas flow through the diffuser gap can be impeded as load and impeller speed increase, thereby alleviating the problems caused by startup loads at low speeds. The VGD mechanism can be used for capacity control as well so as to achieve more effective turndown at low loads.

A stabilizing link and a drive link of a compressor capacity control valve are physically and / or completely separated, for example, such that the respective links use separate and discrete attachment protrusions disposed on a drive ring and a restrictor ring of the capacity control valve. The discrete attachment protrusions are used to apply a lower stress on each attachment protrusion than links that share some attachment protrusions, including a pair of stabilizing links and drive links. A stabilizing link may be connected to the inter-stage housing. The link assembly allows the restrictor ring to be driven in an axial direction to open or close the compressor capacity control valve.

The application provides a kind of based on the capacity control system and control method of grinder system air volume air pressure, applied to material crushing technical field, including abnormal monitoring module, abnormal monitoring module includes screen abnormal monitoring unit and low-efficiency operation monitoring unit;Screen abnormal monitoring unit is used to determine whether screen exists the trend of blockage, if screen exists the trend of blockage, then feedback to capacity adjustment module to reduce the feed amount of grinder;Low-efficiency operation monitoring unit is used to determine whether grinder exists low-efficiency operation, if grinder exists low-efficiency operation, then feedback to capacity adjustment module to increase the feed amount of grinder;Abnormal monitoring module determines whether the screen of grinder exists the trend of blockage according to the real-time data collected by data acquisition module, on the basis of guaranteeing that screen is not blocked, maintain the minimum airflow required for crushing and transportation, and make the motor of grinder run at maximum load at this time, adjust the feed amount of grinder to realize maximum capacity.

A compressor system for a refrigeration system, comprising a plurality of compressors (1), one of which has a first compressor (1) with continuous capacity control (6), is designed to meet the refrigeration system's power requirements by controlling the first compressor (1) as the lead compressor and switching the other compressors (1) on and off as follow-up compressors. This system is intended to increase the service life of the compressors (1) in the system. For this purpose, at least one of the other compressors (1) has continuous capacity control (6), which is speed-independent. The compressor system is further designed to alternatively meet the refrigeration system's power requirements by controlling one of the other compressors (1) as the lead compressor and switching the first and, if applicable, the remaining compressors (1) on and off as follow-up compressors.

Stabilization and drive linkages of a compressor capacity control valve are separated, for example physically and / or entirely, such that the respective linkages use separate and discrete attachment projections provided on the drive and throttle rings of the capacity control valve. The use of discrete attachment projections places lower stress on each attachment projection compared to linkages including paired stabilization and drive linkages sharing some attachment projections. The stabilization linkages can connect to an interstage casing. The linkage assemblies allow the throttle ring to be driven in an axial direction so as to open or close the compressor capacity control valve.

The invention relates to the technical field of rail transit management, in particular to a supersaturated passenger flow pre-control method for an urban rail transit station. The method comprises the following steps: after an activity influence starting moment, according to the large-scale activity outbound representativeness of each station on each subway line at each moment and the relative distance between each station and an activity station, obtaining the large-scale activity participation of each subway line at each moment; in combination with the number of available drivers, the increased transport capacity of each subway line at each moment is obtained; and according to the change trend of the large-scale activity arrival representativeness or the large-scale activity departure representativeness of the activity stations at different moments, obtaining a large-scale activity starting moment and a large-scale activity ending moment, and carrying out transport capacity control on each subway line at different moments. By accurately analyzing the influence of the passenger flow condition of the large-scale activity on the subway transport capacity, reasonable subway transport capacity is provided, and the effectiveness of passenger flow control is improved.

Example implementations involve a sealing liquid delivery system for a mechanical capacity control device of a screw compressor comprising a mechanical capacity control device including a mechanical capacity control valve movable to vary an amount of gas compressed by die screw compressor; a mechanical capacity control device housing including a cavity configured to receive the mechanical capacity control device, a gap formed between the mechanical capacity control device housing and the mechanical capacity control valve: a pressurized sealing liquid delivery member carried by the mechanical capacity control device housing and configured to supply sealing liquid under pressure to the cavity of the mechanical capacity control device housing to inhibit leakage through the gap between the mechanical capacity control device housing and the mechanical capacity control valve.

Stabilization and drive linkages of a compressor capacity control valve are separated, for example physically and / or entirely, such that the respective linkages use separate and discrete attachment projections provided on the drive and throttle rings of the capacity control valve. The use of discrete attachment projections places lower stress on each attachment projection compared to linkages including paired stabilization and drive linkages sharing some attachment projections. The stabilization linkages can connect to an interstage casing. The linkage assemblies allow the throttle ring to be driven in an axial direction so as to open or close the compressor capacity control valve.

A method is provided for controlling an HVAC system. The method includes receiving zone priority levels and zone temperature setpoints, where at least one of the zones haves a higher priority level than others of the zones, receiving an indication of zone ambient temperature values, determining requested zone capacity values to maintain the zone ambient temperature values within a threshold deviation of respective ones of the zone temperature setpoints, determining target zone capacity values from the requested zone capacity values and zone size values, and from the zone priority levels where the target zone capacity values may be responsive to a total of the requested zone capacity values that is less than a minimum capacity or greater than a maximum capacity of the HVAC system, and causing the HVAC system to provide the conditioned air to the zones according to respective ones of the target zone capacity values.

The invention relates to a compressor system for a refrigeration unit, comprising a plurality of compressors (1), a first compressor (1) having a speed-independent continuous capacity control device (6), said compressor system being adapted to control the first compressor (1) as a master compressor and to turn on and off a subsequent compressor (1) as a slave compressor, therefore, the capacity requirement of the refrigerating unit is met, and the service life of the system compressor (1) is prolonged. For this purpose, each compressor (1) has a speed-independent continuous capacity control device (6) for pulse width modulation control on the basis of the valve opening time, and meanwhile, one of the other compressors (1) can serve as a main compressor to be controlled by the compressor system through adjustment, and the first compressor and the subsequent compressor (1) which serves as a slave compressor when necessary are started and stopped, so that the capacity requirement of the refrigerating unit is alternately met.

To provide a screw compressor capable of achieving both expansion of a capacity control range and miniaturization.SOLUTION: The screw compressor includes a screw rotor, a rotor chamber, a suction space, a discharge space, a slide valve, and a slide valve guide provided in the discharge space. The slide valve is configured to open an inlet of a bypass passage, which allows the rotor chamber and the suction space to communicate with each other, to an inner wall surface of the rotor chamber when the slide valve moves toward the discharge space. The slide valve guide has a guide surface and a first groove provided in the guide surface and communicating with the discharge space. The slide valve has a sliding surface facing the guide surface, and a second groove provided in the sliding surface. When the inlet of the bypass passage is open and the first groove and the second groove are opposed to each other, the communication passage including the first groove and the second groove provides communication between the bypass passage and the discharge space.SELECTED DRAWING: Figure 2

Example implementations involve a sealing liquid delivery system for a mechanical capacity control device of a screw compressor comprising a mechanical capacity control device including a mechanical capacity control valve movable to vary an amount of gas compressed by die screw compressor; a mechanical capacity control device housing including a cavity configured to receive the mechanical capacity control device, a gap formed between the mechanical capacity control device housing and the mechanical capacity control valve: a pressurized sealing liquid delivery member carried by the mechanical capacity control device housing and configured to supply sealing liquid under pressure to the cavity of the mechanical capacity control device housing to inhibit leakage through the gap between the mechanical capacity control device housing and the mechanical capacity control valve.

A confluence control part of a slewing-type construction machine controls a confluence switch valve such that the confluence switch valve is switched to a suspension state when a slewing and boom raising manipulation action is performed. A pump capacity control part of the slewing-type construction machine executes a capacity control when the slewing and boom raising manipulation action is performed, the capacity control including regulating a first pump capacity and a second pump capacity respectively in such a manner that the first pump capacity increases and the second pump capacity decreases as an operating pressure difference resulting from the subtraction of a slewing operating pressure from a boom operating pressure increases, and the first pump capacity decreases and the second pump capacity increases as the operating pressure difference decreases.