CN111828396A - Double-machine parallel-pushing axial flow fan stationary blade adjusting device - Google Patents
Double-machine parallel-pushing axial flow fan stationary blade adjusting device Download PDFInfo
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- CN111828396A CN111828396A CN202010749592.2A CN202010749592A CN111828396A CN 111828396 A CN111828396 A CN 111828396A CN 202010749592 A CN202010749592 A CN 202010749592A CN 111828396 A CN111828396 A CN 111828396A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/56—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/563—Fluid-guiding means, e.g. diffusers adjustable specially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes
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Abstract
The invention provides a double-machine parallel-pushing axial flow fan stationary blade adjusting device, and relates to the technical field of adjusting devices. The self-contained actuator comprises an apparatus body, wherein a self-contained actuator is arranged on the apparatus body, the self-contained actuator comprises a first self-contained actuator and a second self-contained actuator, the first self-contained actuator is arranged at the left end of the apparatus body, the second self-contained actuator is arranged at the right end of the apparatus body, the first self-contained actuator comprises a first actuator body and a first control box, the first actuator body is connected with a driven stator blade mechanism, the first control box and the first actuator body are installed in a split mode, the second self-contained actuator comprises a second actuator body and a second control box, the second actuator body is connected with the driven stator blade mechanism, and the second control box and the second actuator body are installed in a split mode. The invention adopts a double-cylinder parallel scheme of double self-capacitance type electro-hydraulic actuators, two self-capacitance type electro-hydraulic actuators are respectively arranged on two sides of the double-cylinder parallel scheme, the double-cylinder parallel scheme receives a central control 4-20mA instruction, and meanwhile, the adjustment is carried out, when deviation exists between the left side and the right side, the deviation is actively corrected, and the deviation is eliminated in real time.
Description
Technical Field
The invention relates to the technical field of adjusting devices, in particular to a double-machine parallel-pushing axial flow fan stationary blade adjusting device.
Background
The conventional hydraulic control system for adjusting the stationary blade of the axial flow fan usually adopts an open hydraulic station system, and adopts a servo valve to control oil cylinders which are connected in parallel at two sides. The existing problems are that the system is inconvenient to maintain, the synchronous control deviation is uncontrollable, the oil quality is easily polluted, and the system is easy to be out of control. At present, the development direction of stationary blade control is already the self-contained electro-hydraulic actuator to replace a common open hydraulic station. Most of self-contained electro-hydraulic actuator stationary blade adjusting systems adopted in the current market are single power heads controlling double-side oil cylinders, and the problem that double sides are synchronously controllable is still not solved.
Disclosure of Invention
Aiming at the defects existing in the problems, the invention provides the double-motor parallel-pushing axial flow fan static blade adjusting device, which adopts a double-cylinder parallel scheme of double self-capacitance type electro-hydraulic actuators, wherein one self-capacitance type electro-hydraulic actuator is respectively arranged on two sides of the double-cylinder parallel scheme, receives a central control 4-20mA instruction, adjusts the central control at the same time, actively corrects the deviation when the left deviation and the right deviation exist, and eliminates the deviation in real time.
In order to solve the above problems, the present invention provides a stationary blade adjusting device for a dual-motor axial flow fan, comprising a device body, wherein the device body is provided with a self-contained actuator, the self-contained actuator comprises a first self-contained actuator and a second self-contained actuator, the first self-contained actuator is arranged at the left end of the device body, the second self-contained actuator is arranged at the right end of the device body, the first self-contained actuator comprises a first actuator body and a first control box, the first actuator body is connected with a driven stationary blade mechanism, the first control box and the first actuator body are installed in a split mode, the second self-contained actuator comprises a second actuator body and a second control box, the second actuator body is connected with a driven stationary blade mechanism, and the second control box and the second actuator body are installed in a split mode.
Preferably, first executor body includes that first hand wheel, first piston rod, first universal joint shaft coupling, first unit head, first quiet leaf locking lock are female, first hydro-cylinder, first linking bridge, a high strength connecting bolt, first quiet leaf mechanism, first terminal box, first hand wheel first hydro-cylinder first unit head all occupies exterior space in the door type frame, and the door type frame is stretched out to the hand wheel, can make things convenient for manually operation.
Preferably, the first connecting support is connected with the first oil cylinder and fixed to a portal frame of the compressor through the first high-strength connecting bolt, the first stationary blade locking nut is arranged at the front end of the first connecting support, the nut needs to be locked when the actuator is dismounted on line, the stationary blade is locked, and the actuator can be safely dismounted.
Preferably, adopt between first piston rod and the quiet leaf mechanism first universal joint shaft coupling avoids leading to equipment to damage because of the decentraction of during operation, first terminal box is fixed to the door type frame outside, makes things convenient for the wiring.
Preferably, the second executor body includes second hand wheel, second piston rod, second universal joint coupling, second unit head, the quiet leaf locking of second lock nut, second hydro-cylinder, second linking bridge, second high strength connecting bolt, the quiet leaf mechanism of second, second terminal case, the second hand wheel the second hydro-cylinder the second unit head all occupies exterior space in the door type frame, and the hand wheel stretches out the door type frame, can make things convenient for manually operation.
Preferably, the second connecting support is connected with the second oil cylinder and fixed to a portal frame of the compressor through the second high-strength connecting bolt, the second stationary blade locking nut is arranged at the front end of the second connecting support, the nut needs to be locked when the actuator is dismounted on line, the stationary blade is locked, and the actuator can be safely dismounted.
Preferably, adopt between second piston rod and the quiet leaf mechanism the second universal joint coupling avoids leading to equipment to damage because of the decentraction of during operation, the second terminal box is fixed to the door type frame outside, makes things convenient for the wiring.
Preferably, two sets of independent CPU processing modules and servo drivers are arranged in the first control box, a central control instruction is sent to the first control box, a signal distributor divides a control signal into two paths, the two paths of control signal are respectively sent to the driving actuator CPU and the driven actuator CPU at the same time, and the two sets of actuators execute the same control task at the same time.
Preferably, two sets of independent CPU processing modules and servo drivers are arranged in the second control box, a central control instruction is sent to the second control box, a signal distributor divides a control signal into two paths, the two paths of control signal are respectively sent to the driving actuator CPU and the driven actuator CPU at the same time, and the two sets of actuators execute the same control task at the same time.
Compared with the prior art, the invention has the following advantages:
the invention adopts a double-cylinder parallel scheme of double self-capacitance type electro-hydraulic actuators, the self-capacitance type electro-hydraulic actuators are respectively arranged on two sides, the central control 4-20mA instruction is received, the adjustment is carried out simultaneously, when the left and right deviation exists, the deviation is actively corrected, the deviation is eliminated in real time, the associated oil pipelines of the left and right oil cylinders are cancelled, the system structure is greatly simplified, the association synchronization is carried out by reliable electric signals, and once the deviation exceeds the limit, the locking and the alarming are carried out simultaneously.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a block diagram of dual-control interconnect control according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the accompanying drawings and examples, which are not intended to limit the present invention.
At present, imported self-contained electro-hydraulic actuators are adopted in the market, secondary development cannot be carried out on software, dual-machine interconnection and coordination control cannot be realized, only one actuator power unit can be used for controlling two oil cylinders, a follow-up oil cylinder can only work passively, even alarm and locking cannot be carried out when deviation exceeds the limit, even if bilateral sensor configuration is adopted, when the deviation exceeds the limit, an instruction can only be sent by a central control to carry out passive locking, active real-time correction cannot be carried out, threat is caused to production safety, and the probability of unplanned shutdown of a unit is greatly improved. Moreover, the stationary blade adjusting system of the type is in an open debugging environment during field installation, oil needs to be canned on the field, a high-quality state of the actuator when the actuator leaves a factory cannot be ensured, the field installation and debugging work is heavy, the quality is uncontrollable, the left oil cylinder and the right oil cylinder are balanced by an oil pipeline and a manual adjusting valve, real-time synchronization cannot be realized in the adjusting process, and the problem of left and right asynchronization is more serious along with the change of the operation condition of the unit after static adjustment. The scheme has the outstanding advantages that the displacement signals of the left side and the right side are transmitted to the field CPU in real time and are also transmitted to the central control unit remotely, so that operators can monitor left and right deviations at any time, and safety accidents caused by too large deviation are avoided.
As shown in fig. 1 and 2, an embodiment of the present invention includes an apparatus body, where a self-contained actuator is disposed on the apparatus body, the self-contained actuator includes a first self-contained actuator and a second self-contained actuator, the first self-contained actuator is disposed at a left end of the apparatus body, the second self-contained actuator is disposed at a right end of the apparatus body, the first self-contained actuator includes a first actuator body and a first control box, the first actuator body is connected to a driven vane mechanism, the first control box is mounted in a split manner with the first actuator body, the second self-contained actuator includes a second actuator body and a second control box, the second actuator body is connected to the driven vane mechanism, and the second control box is mounted in a split manner with the second actuator body.
In this embodiment, the first actuator body includes first hand wheel, first piston rod, first universal joint shaft coupling, first unit head, first quiet leaf locking nut, first hydro-cylinder, first connecting support, first high strength connecting bolt, first quiet leaf mechanism, first terminal box, and first hand wheel, first hydro-cylinder, first unit head are all in the door type frame, do not occupy exterior space, and the hand wheel stretches out the door type frame, can make things convenient for manually operation. First linking bridge and first hydro-cylinder are connected and on the door type frame of fixing the compressor through first high strength connecting bolt, and first linking bridge front end is provided with first quiet leaf lock nut, dies the nut lock when needing demolising the executor on line, and quiet leaf is locked immediately, can be safe tear down the executor. Adopt first universal joint shaft coupling between first piston rod and the quiet leaf mechanism, avoid leading to equipment to damage because of the decentraction of during operation, first terminal box is fixed to the door type frame outside, makes things convenient for the wiring. The LVDT can be built in the oil cylinder and can also be arranged on the connecting support, if the LVDT is externally arranged, the fault of the LVDT caused by high temperature can be avoided, and the connecting support is designed with the position for installing the LVDT, so that the LVDT is convenient to install and overhaul.
In this embodiment, the core of the first actuator body part is a first electro-hydraulic power module, which includes a first servo motor, a first oil pump, a first hydraulic control interlock valve, a first oil storage tank, and the like. The first power module quickly conveys pressure oil with rated pressure of 15-20MPa to the first hydraulic cylinder. The actuator has power modules with different output forces, and the power modules with different specifications are different in output displacement of the pump and the full stroke operation time of the actuator caused by the output displacement. The only visible appearance difference is the motor shape difference. The 15000Kgf power unit is adopted at this time, so that the output force and the action time of the first oil cylinder are ensured to meet the use requirements, and the actuator can move a full stroke within 3S at the fastest speed.
In this embodiment, the IXSA actuator has three types of hydraulic cylinders. The first is a straight stroke actuator with a small size (the stroke is less than 150mm), and the oil cylinder is processed by an alloy block. The second is for the bigger linear stroke executor, its hydro-cylinder adopts the pull rod hydro-cylinder. The third cylinder is a rack and pinion rotary structure used on the rotary valve and damper drive unit. The function of the flow matching system is to ensure that the oil volumes on both sides of the oil cylinder change in equal amounts. Therefore, the hydraulic oil can work normally under the condition of no buffer oil tank. The hydro-cylinder that this scheme adopted is the first form, adopts the metal block processing.
In the embodiment, the first oil pump and the connecting accessories thereof are integrated in the first oil pump power comprehensive integrated block, the internally integrated micro overflow valve is used for overpressure protection, and when the power system is abnormally overpressure, the overflow valve acts quickly to protect the whole system from overpressure leakage and damage. The oil liquid adopts 5W-50 engine oil or aviation hydraulic oil to adapt to low-temperature and high-temperature environments.
In this embodiment, the pressure-fired maintenance system that has integrateed in first oil tank subassembly has mechanical oil pointer instruction and inductive switch, can monitor the oil level on the spot, also can report to the police teletransmission, and when the oil level was less than warning value, usable hand-held type nozzle refuels, easy operation, entire system oil mass is few, about 1L about, generally 2 to 5 years mend oil once can, do not influence the executor during the oil supplementation and normally work, on line mend oil can.
In the embodiment, the system does not have any electromagnetic valve, except for the servo motor, all the electromagnetic valves are mechanical control units, and the reliability and the adaptability to the environment are greatly improved.
In this embodiment, the second actuator body includes a second hand wheel, a second piston rod, a second universal joint coupler, a second power head, a second stationary blade locking nut, a second oil cylinder, a second connecting bracket, a second high-strength connecting bolt, a second stationary blade mechanism, and a second terminal box, the second hand wheel, the second oil cylinder, and the second power head are all in the portal frame, and do not occupy the external space, the hand wheel extends out of the portal frame, and can be conveniently operated manually, the second connecting bracket is connected with the second oil cylinder and is fixed to the portal frame of the compressor through the second high-strength connecting bolt, the second stationary blade locking nut is arranged at the front end of the second connecting bracket, the nut is locked when the actuator needs to be removed online, the stationary blade is locked, and the actuator can be safely removed, the second universal joint coupler is adopted between the first piston rod and the stationary blade mechanism, thereby avoiding the equipment damage caused by different centers during operation, the second terminal box is fixed to the outer side of the door-shaped frame, and wiring is facilitated. The LVDT can be built in the oil cylinder and can also be arranged on the connecting support, if the LVDT is externally arranged, the fault of the LVDT caused by high temperature can be avoided, and the connecting support is designed with the position for installing the LVDT, so that the LVDT is convenient to install and overhaul.
In this embodiment, the core of the second actuator body part is a second electro-hydraulic power module, which includes a second servo motor, a second oil pump, a second hydraulic interlock valve, a second oil storage tank, and the like. The second power module quickly conveys pressure oil with rated pressure of 15-20MPa to the second hydraulic cylinder. The actuator has power modules with different output forces, and the power modules with different specifications are different in output displacement of the pump and the full stroke operation time of the actuator caused by the output displacement. The only visible appearance difference is the motor shape difference. The 15000Kgf power unit is adopted at this time, so that the output force and the action time of the second oil cylinder are ensured to meet the use requirements, and the actuator can move a full stroke within 3S at the fastest speed.
In this embodiment, the IXSA actuator has three types of hydraulic cylinders. The first is a straight stroke actuator with a small size (the stroke is less than 150mm), and the oil cylinder is processed by an alloy block. The second is for the bigger linear stroke executor, its hydro-cylinder adopts the pull rod hydro-cylinder. The third cylinder is a rack and pinion rotary structure used on the rotary valve and damper drive unit. The function of the flow matching system is to ensure that the oil volumes on both sides of the oil cylinder change in equal amounts. Therefore, the hydraulic oil can work normally under the condition of no buffer oil tank. The hydro-cylinder that this scheme adopted is the first form, adopts the metal block processing.
In the embodiment, the second oil pump and the connecting accessories thereof are integrated in the second oil pump power comprehensive integrated block, the internally integrated micro overflow valve is used for overpressure protection, and when the power system is abnormally overpressure, the overflow valve acts quickly to protect the whole system from overpressure leakage and damage. The oil liquid adopts 5W-50 engine oil or aviation hydraulic oil to adapt to low-temperature and high-temperature environments.
In this embodiment, the inside pressure-fired maintenance system that has integrateed of second oil tank subassembly has mechanical oil pointer instruction and inductive switch, can monitor the oil level on the spot, also can report to the police teletransmission, and when the oil level was less than warning value, usable hand-held type nozzle refuels, easy operation, entire system oil mass is few, about 1L about, general 2 to 5 years mend oil once can, do not influence the executor during the oil supplementation and normally work, on line mend oil can.
In the embodiment, the system does not have any electromagnetic valve, except for the servo motor, all the electromagnetic valves are mechanical control units, and the reliability and the adaptability to the environment are greatly improved.
In the embodiment, a self-contained electro-hydraulic actuator body is arranged in bilateral symmetry, a first control box is correspondingly arranged on the first actuator body, two sets of independent CPU processing modules and servo drivers are arranged in the first control box, a central control instruction is sent to the control box, a signal distributor divides a control signal into two paths, the two paths are respectively and simultaneously sent to a driving actuator CPU and a driven actuator CPU, the two sets of actuators simultaneously execute the same control task, speed and displacement deviation can be generated due to uneven mechanical stress of a controlled object, the driven actuator CPU monitors the deviation constantly, when the deviation exceeds the limit, the self regulation curve is immediately corrected, the deviation is corrected in real time, and the deviation minimization and the controllability of a left oil cylinder and a right oil cylinder are realized.
In this embodiment, the first control box includes a position Controller (CPU), an a/D converter, a power module, a motor driver, a fuse, a filter, a relay, and a terminal area. The liquid crystal display and the key operation area can be seen outside the box body, man-machine interaction can be carried out through the area, parameters are set, and the parameters are read.
In this embodiment, the first control box receives a remote 4-20mA control signal, and after the PID algorithm operation, sends the signal to the servo driver, and further drives the servo motor to rotate according to a certain curve, and when the position reaches the target position, the rotation is stopped. The software algorithm adopts an intelligent PID algorithm, and parameters are convenient to correct, so that the adaptability of the actuator is stronger. When the actuator breaks down, the software automatically processes and identifies the error category, and adopts different protection mechanisms according to different faults, thereby protecting the safety of the actuator and controlled equipment in real time and maintaining a reasonable production line protection mechanism.
In the embodiment, in the first control box, because the CPU processing unit adopts a technically advanced, mature and reliable product, the interconnection communication and cooperative control of a plurality of CPUs can be realized, so that a good foundation is laid for multi-machine parallel pushing.
In the embodiment, a self-contained electro-hydraulic actuator body is arranged in bilateral symmetry, a second control box is correspondingly arranged on the second actuator body, two sets of independent CPU processing modules and servo drivers are arranged in the second control box, a central control instruction is sent to the second control box, a signal distributor divides a control signal into two paths and respectively sends the two paths of control signals to the driving actuator CPU and the driven actuator CPU at the same time, the two sets of actuators execute the same control task at the same time, because the mechanical stress of a controlled object is uneven, the speed and displacement deviation can be generated, the driven actuator CPU monitors the deviation constantly, when the deviation exceeds the limit, the self regulation curve is corrected immediately, the deviation is corrected in real time, and the deviation minimization and the controllability of the left oil cylinder and the right oil cylinder are realized.
In this embodiment, the second control box includes a position Controller (CPU), an a/D converter, a power supply module, a motor driver, a fuse, a filter, a relay, and a terminal area. The liquid crystal display and the key operation area can be seen outside the box body, man-machine interaction can be carried out through the area, parameters are set, and the parameters are read.
In this embodiment, the second control box receives a remote 4-20mA control signal, and sends the signal to the servo driver after PID algorithm operation, so as to drive the servo motor to rotate according to a certain curve, and when the position reaches a target position, the rotation is stopped. The software algorithm adopts an intelligent PID algorithm, and parameters are convenient to correct, so that the adaptability of the actuator is stronger. When the actuator breaks down, the software automatically processes and identifies the error category, and adopts different protection mechanisms according to different faults, thereby protecting the safety of the actuator and controlled equipment in real time and maintaining a reasonable production line protection mechanism.
In this embodiment, in the second control box, since the CPU processing unit adopts a technically advanced, mature and reliable product, the interconnection communication and cooperative control of the plurality of CPUs can be realized, which lays a good foundation for multi-machine parallel pushing.
In this embodiment, the self-contained electro-hydraulic actuator is described as follows: under the national trend of urgent need for localization of major technical equipment, the IXSA intelligent electro-hydraulic actuator is high-tech equipment for replacing foreign high-end imported products, is a high-tech product integrating multiple disciplinary technologies such as machinery, electronics, hydraulic pressure and the like, and the core component of the hydraulic part of the IXSA intelligent electro-hydraulic actuator is a hydraulic control interlocking valve and is a patent product with independent intellectual property rights. The electric control product adopts an advanced software control technology, and realizes the characteristics of various functions and stable performance of the product.
The IXSA intelligent electro-hydraulic actuator is specially designed for large-output adjustment, and is an integrated and modular electro-hydraulic execution driving device controlled by a microprocessor. The micro-closed positive pressure oil source has the characteristics of high control precision, large output, high adjusting speed, high positive pressure and extremely high pollution resistance. An external oil supply station and an external oil pipeline are not needed, the structure of the hydraulic system is greatly simplified, maintenance work such as oil filtering, heating and cooling of the oil station is not needed, and pollution such as external environment dust, moisture and radiation is avoided.
The IXSA intelligent electro-hydraulic actuator uses a proprietary hydraulic control interlocking system, which is simply a working mode that an oil pump is used for conveying hydraulic oil (motor oil) from one end of a double-acting oil cylinder to the other end of the double-acting oil cylinder. Once the actuator correctly reaches the target position, the oil pump motor stops running, the hydraulic control interlocking valve quickly locks the position of the oil cylinder, and after the oil cylinder is positioned, energy is not needed for maintaining the position. The hydraulic operation is controlled by a special microprocessor and control software in the control box, and the switch type actuator can also be controlled by hardware logic.
Software designed by the IXSA intelligent electro-hydraulic actuator allows a user to set operation parameters, so that the output of the actuator can adapt to different loads.
The actuator comprises two main parts, namely an actuator body (a servo motor, an oil cylinder, a modular oil circuit, a feedback device and an electro-hydraulic power module) part and a control box part. The executor body is connected with the driven stationary blade mechanism together, and the control box and the executor are installed in a split mode or integrated together and adopt an explosion-proof design.
In the embodiment, the two self-contained actuators are respectively installed on two sides of the compressor and push the static blade adjusting mechanism, no hydraulic related pipeline exists between the two actuators, and the whole structure is extremely simple. The oil cylinder and the power head are arranged in the door-shaped bracket, and the external space is not occupied. The actuator tested in a factory is directly installed on the compressor, an oil pipeline does not need to be connected on site, oil liquid and air do not need to be canned on site, installation and debugging are very simple, and performance quality degradation of the actuator and pollution of the oil liquid caused by opening the oil way on site are avoided. The actuator can be overhauled online. If the actuator is in fault and needs to be removed for repair or replacement, the static blade can be locked by the locking nut, the fault actuator is removed on line, any oil way does not need to be opened, the actuator is repaired or a new actuator is replaced, the locking nut is opened after the actuator is replaced, the static blade is put into operation without disturbance, and any fault does not need to be processed in a shutdown mode.
In the embodiment, the double-side double-machine double-push structure greatly improves the adjustment quality and safety, and can reach the level of 'never stopping'. Each actuator is provided with a power source, and when the oil cylinder has weak internal leakage, each self-propelled device can correct pressure automatically and keep synchronization. The mode of one machine and double cylinders cannot be realized, and because the pressure of the two oil cylinders is always the same, when the pressure inside the oil cylinders leaks slightly or the load changes, the pressure appears to be seriously asynchronous, but cannot be corrected.
In this embodiment, the configuration and parameters of the power head of the actuator hydraulic body part are as follows:
the D50T power head is selected, and the key parameters are as follows
(1) Maximum output pressure: 35 MPa;
(2) rated working pressure: 15MPa
(3) The fastest response speed is as follows: 50mm/s
(4) And (3) control precision: 0.05% -1% adjustable
(5) Reference power: 1-2KW (working hour)
(6) Rotating speed of the servo motor: 0-6500 r/min is adjustable
(7) Protection: power-off safety position (locking)
In this embodiment, the configuration and parameters of the cylinders of the hydraulic body of the actuator
(1) Maximum output of the oil cylinder: 24000kgf
(2) Rated output of the oil cylinder: 15000kgf (Power head can adjust output according to controlled equipment load)
(3) Full stroke of oil cylinder 55mm (designed according to user requirements)
(4) Adjusting speed: 50mm/min (adjustment range: 600mm/min-40mm/min)
(5) The working temperature range of the actuator is as follows: -30 to 125 DEG C
(6) The side of the oil cylinder close to the compressor body can be optionally provided with a heat insulation protection plate
(7) LVDT sensor: the high-precision sensor can adopt an external mode, so that the service life is prolonged
(8) Sealing element: all adopt fluororubber materials
(9) Working medium: mobil No. 1 engine oil, 5W-50 (or other medium according to user requirements)
(10) Normal service life of the oil cylinder: more than 30 years
All equipment protection classes: IP65
In this embodiment, the locking device is kept apart on line to the hydro-cylinder: the locking device adopts a locking nut locking device, when the actuator is in fault and needs to be removed on line, the locking nut is locked, the connecting shaft at the side of the static blade mechanism is locked, and the actuator can be replaced and maintained without stopping. After the repaired actuator is replaced, the lock nut is unscrewed, the piston rod and the connecting shaft are released, and the actuator can be immediately put into operation without interference.
In this embodiment, the gimbal connection device: the piston rod of the oil cylinder and the controlled static blade pistol plate are connected by the universal joint, so that the faults of piston rod side grinding, sealing damage and the like caused by the lateral force generated by non-concentricity are avoided.
In this embodiment, the dual-machine parallel and push: the central control instruction is sent to the field control box, one path of control instruction is divided into two paths in the control box, the two paths of control instruction are simultaneously sent to the CPU of the actuator A and the CPU of the actuator B, and the two actuators respectively execute own control loops and simultaneously push the stationary blades. The actuators are in a position closed-loop control mode, each actuator rapidly eliminates position difference caused by instruction change to finally reach a target position, and output pressure curves are continuously changed in real time according to load changes of the actuators in the adjusting process, so that the time when the actuators reach the target position is basically consistent and the speed is basically consistent no matter how the loads on the left side and the right side are changed, and high synchronization is kept. Because the precision of the actuator is controllable and high, the synchronism can be kept better under the same instruction.
In this embodiment, master-slave coordination control: if one actuator is adopted to control the oil cylinders on the two sides, the active deviation rectifying function cannot be realized, and only fault locking can be reported once the left deviation and the right deviation exceed the limit. Moreover, when the double-side oil cylinder is pushed, because the oil pressure on both sides is the same, the load on both sides of the static blade cannot be absolutely balanced, and the oil cylinder cannot change output force by itself, the action of the oil cylinder always advances in a staggered mode, fluctuates left and right, and the adjustment stability and the quality are poor. Also, when the power head LVDT fails and drifts, a loss of control of the stationary vanes may occur.
In this embodiment, coordination control (active deviation correction): setting the actuator B as a driven actuator, converting the deviation of the two oil cylinders into an instruction through a function and superposing the instruction on an output instruction of the actuator B, driving a servo motor, quickly eliminating the asynchronism of the stator blade during adjustment, and once the deviation enters a dead zone (0.05-1mm, the dead zone can be determined according to the requirement of a user), changing the superposed instruction into zero. When the deviation of the oil cylinders on the two sides exceeds the dead zone 2 (the dead zone can be set according to the requirements of users), the two actuators simultaneously send out fault locking, and the current positions of the oil cylinders on the two sides are locked. When any actuator is in fault locking order, the double-side oil cylinders are locked in a related mode.
In this embodiment, the drift pinning control: if one actuator is adopted to control the oil cylinders on the two sides, when the LVDT has a fault and drifts, the actuator can not be identified, so that the fault action is caused, the two oil cylinders simultaneously perform the fault action, and the accident that the static blade is out of control occurs. The double-actuator parallel double-push control mode has a drift containment control function, and under an extreme condition, when one actuator LVDT has fault drift, once the actuator is in misoperation, the other actuator can sense large deviation and rapidly sends out a locking instruction, the output of the two controllers is cut off, and the actuators are immediately locked. The possibility of the two actuators to have fault drift at the same time is almost zero, and the reliability of the stationary blade control is greatly improved. The double-actuator double-push control has a perfect protection mechanism, provides firm safety guarantee for users, and ensures that serious economic loss caused by the fact that the static blade is out of control due to any fault of a hydraulic control system cannot be caused.
In this example, table 1: system fault alarm summary table
In this example, table 2: system communication contact summary table
In this example, the parameter comparison table
| Parameter(s) | Inquiry value/specification of price document | Quoted product actual value/specification |
| Adjusting signals | 4～20mA | 4～20mA |
| Stator blade angle signaling | 4～20mA | 4～20mA |
| Alarm output | Is provided with | Is provided with |
| Control accuracy | 0.1％ | 0.1％ |
| Single maximum output force | ≥110KN | 150-240KN |
| Adjusting the stroke | 48mm | Is adjustable within 55mm |
| Regulating speed | 50mm/min | 600mm/min-40mm/min is adjustable |
| Controlling power supply | 220VAC | 220VAC |
| Operating temperature | -20～60℃ | -30～125℃ |
| Explosion protection class | Non-explosion-proof | Non-explosion (can be made explosion-proof) |
| Protection class | IP65 | IP65 |
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
In the description of the present specification, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of describing the technical solutions of the present patent and for simplification of the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be interpreted as limiting the present patent application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this patent application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this specification, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present specification can be understood by those of ordinary skill in the art as appropriate.
In this specification, unless explicitly stated or limited otherwise, a first feature may be "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (9)
1. A double-machine parallel-pushing axial flow fan stationary blade adjusting device comprises a device body and is characterized in that, the device body is provided with a self-contained actuator which comprises a first self-contained actuator and a second self-contained actuator, the first self-contained actuator is arranged at the left end of the device body, the second self-contained actuator is arranged at the right end of the device body, the first self-contained actuator comprises a first actuator body and a first control box, the first actuator body is connected with a driven stationary blade mechanism, the first control box and the first actuator body are installed in a split mode, the second self-contained actuator comprises a second actuator body and a second control box, the second actuator body is connected with a driven stationary blade mechanism, and the second control box and the second actuator body are installed in a split mode.
2. The double-motor parallel-pushing axial flow fan stationary blade adjusting device as claimed in claim 1, wherein the first actuator body comprises a first hand wheel, a first piston rod, a first universal joint coupler, a first power head, a first stationary blade locking nut, a first oil cylinder, a first connecting support, a first high-strength connecting bolt, a first stationary blade mechanism and a first terminal box, the first hand wheel, the first oil cylinder and the first power head are all arranged in a portal frame, no external space is occupied, and the hand wheel extends out of the portal frame to facilitate manual operation.
3. The double-machine axial flow fan stationary blade adjusting device as claimed in claim 2, wherein the first connecting bracket is connected with the first cylinder and fixed to a gantry of a compressor by the first high-strength connecting bolt, the first stationary blade locking nut is arranged at the front end of the first connecting bracket, and when the actuator needs to be removed online, the nut is locked, the stationary blade is locked and fixed, and the actuator can be safely removed.
4. The dual-motor axial flow fan stationary blade adjusting device as claimed in claim 3, wherein the first universal joint coupling is adopted between the first piston rod and the stationary blade mechanism, so as to avoid equipment damage caused by misalignment during operation, and the first terminal box is fixed to the outer side of the gantry, so as to facilitate wiring.
5. The double-motor parallel-pushing axial flow fan stationary blade adjusting device as claimed in claim 4, wherein the second actuator body comprises a second hand wheel, a second piston rod, a second universal joint coupler, a second power head, a second stationary blade locking nut, a second oil cylinder, a second connecting bracket, a second high-strength connecting bolt, a second stationary blade mechanism and a second terminal box, the second hand wheel, the second oil cylinder and the second power head are all arranged in a portal frame, no external space is occupied, and the hand wheel extends out of the portal frame to facilitate manual operation.
6. The double-machine axial flow fan stationary blade adjusting device according to claim 5, wherein the second connecting bracket is connected with the second oil cylinder and fixed to a portal frame of a compressor through the second high-strength connecting bolt, the second stationary blade locking nut is arranged at the front end of the second connecting bracket, the nut is locked when the actuator needs to be removed online, the stationary blade is locked, and the actuator can be safely removed.
7. The dual-motor axial flow fan stator blade adjusting device as claimed in claim 6, wherein the second universal joint coupler is adopted between the second piston rod and the stator blade mechanism, so as to avoid equipment damage caused by misalignment during operation, and the second terminal box is fixed to the outer side of the door-shaped frame, so that wiring is facilitated.
8. The dual-motor thrust axial flow fan stationary blade adjusting device according to claim 7, wherein two sets of independent CPU processing modules and servo drivers are arranged in the first control box, a central control instruction is sent to the first control box, a signal distributor divides a control signal into two paths, the two paths are respectively sent to the driving actuator CPU and the driven actuator CPU at the same time, and the two sets of actuators execute the same control task at the same time.
9. The dual-motor thrust axial flow fan stationary blade adjusting device according to claim 8, wherein two sets of independent CPU processing modules and servo drivers are arranged in the second control box, a central control command is sent to the second control box, a signal distributor divides a control signal into two paths, the two paths are respectively sent to the driving actuator CPU and the driven actuator CPU at the same time, and the two sets of actuators execute the same control task at the same time.
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| CN202010749592.2A CN111828396A (en) | 2020-07-30 | 2020-07-30 | Double-machine parallel-pushing axial flow fan stationary blade adjusting device |
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| CN202010749592.2A CN111828396A (en) | 2020-07-30 | 2020-07-30 | Double-machine parallel-pushing axial flow fan stationary blade adjusting device |
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