CN108506199B - Reciprocating compressor flow control system - Google Patents
Reciprocating compressor flow control system Download PDFInfo
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- CN108506199B CN108506199B CN201710108665.8A CN201710108665A CN108506199B CN 108506199 B CN108506199 B CN 108506199B CN 201710108665 A CN201710108665 A CN 201710108665A CN 108506199 B CN108506199 B CN 108506199B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
- F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
A kind of reciprocating compressor flow control system.Include: dynamic pressure transducer, including axis side dynamic pressure transducer and lid side dynamic pressure transducer, measures cylinder axis side dynamic pressure and lid side dynamic pressure；Key phase measures compressor crank shaft phase and speed of crankshaft；Part opens air-breathing valve flow adjustment device, air-breathing valve flow adjustment device is opened including axis side section and lid side section opens air-breathing valve flow adjustment device, axis side section opens air-breathing valve flow adjustment device and is set to cylinder axis side, adjust the charge flow rate of cylinder axis side, lid side section opens air-breathing valve flow adjustment device and is set to cylinder head side, adjusts the charge flow rate of cylinder head side；Monitor regulating system, reflex angle is determined according to dynamic pressure transducer and key phase, when it is less than reflex angle allowable, control section opens air-breathing valve flow adjustment device adjustment axis side charge flow rate and lid side charge flow rate, and reflex angle is made to be greater than or equal to reflex angle allowable.
Description
Technical field
The present invention relates to Compressor Technology fields, more particularly, to a kind of reciprocating compressor flow control system.
Background technique
Reciprocating compressor has the characteristics that range of flow is wide, pressure ratio is high, is widely applied in fields such as petroleum, chemical industry.
When design selection, reciprocating compressor should meet the operating condition of maximum stream flow and maximum pressure ratio, and in actual operation, it is abundant due to designing
The factors such as amount, operating condition variation, the condition of production need to carry out flow adjusting to compressor.Flow adjusts long-term to energy-saving and equipment
Steady running all has significance.The more typical flow regulative mode of reciprocating compressor has following four kinds: bypass adjusting, off-load
Device adjusts, variable clearance step-less adjustment, partially opens inlet valve step-less adjustment.Wherein, inlet valve step-less adjustment side is partially opened
Formula is by the opening and closing of inlet valve in control compression travel, to realize tolerance continuous stepless regulation, CN03158561.2 and
The patents such as US7331767 disclose such regulative mode.This regulative mode has that flow adjustment range is wide, energy conservation and consumption reduction effects
The advantages such as significant, thus be widely used on the large reciprocating compressor of refinery devices such as being hydrocracked.
Reciprocating compressor vulnerable part is more, the source of trouble is more, and unit is caused to be difficult to smooth long term running.Field experience discovery, even
One of the main reason for bar microcephaly's bearing shell burning fault is unit disorderly closedown.Studies have shown that microcephaly's bearing shell burn mainly with
Small end bushing insufficient lubrication is related.There are many reason of leading to its insufficient lubrication, such as reflex angle is too small, stopping up of oil channel, low oil pressure
Deng it is the most important reason for causing small end of connecting rod bearing shell to burn that wherein reflex angle is too small.Therefore, reflex angle numerical value directly affects past
The no operation steady in a long-term of compound compression function.The more regulation reflex angles of domestic and international compressor manufacturer cannot be less than 40 degree, to avoid reversed
The too small stable operation for influencing unit in angle.
Currently, part, which opens inlet valve flow control system, adjusts ratio using identical flow for cylinder head side and axis side
Example, i.e. average adjusted.However, field experience and studies have shown that using existing regulating system may cause because reflex angle reduce due to
The failure for causing microcephaly's bearing shell to burn, and unit vibration aggravation may be caused, it greatly affected the stability of reciprocating compressor
With reliability.Therefore, it is necessary to develop a kind of reciprocating compressor flow control system, inlet valve tune is opened to avoid existing part
Influence of the section system to components such as microcephaly's bearing shells.
The information for being disclosed in background of invention part is merely intended to deepen the reason to general background technique of the invention
Solution, and it is known to those skilled in the art existing to be not construed as recognizing or imply that the information is constituted in any form
Technology.
Summary of the invention
The invention proposes a kind of reciprocating compressor flow control systems, can be by adjusting cylinder axis side charge flow rate
With lid side charge flow rate, reflex angle numerical value is promoted, avoids reciprocating compressor flow control system to the bad shadow of microcephaly's bearing shell etc.
It rings.
To achieve the goals above, a kind of reciprocating compressor flow control system proposed according to the present invention, comprising: dynamic
Pressure sensor, including axis side dynamic pressure transducer and lid side dynamic pressure transducer, are respectively used to measure the compressor
Cylinder axis side dynamic pressure and lid side dynamic pressure；Key phase, for measure the compressor crank phase and
Speed of crankshaft；Part opens air-breathing valve flow adjustment device, including axis side section opens air-breathing valve flow adjustment device and lid side
Part opens air-breathing valve flow adjustment device, and the axis side section opens air-breathing valve flow adjustment device and is set to the compressor
Cylinder axis side, the charge flow rate of the axis side for adjusting the cylinder, the lid side section open inlet valve flow adjust dress
The lid side for being placed in the cylinder of the compressor is installed, the charge flow rate of the lid side for adjusting the cylinder；Regulating system is monitored,
It is small in the reflex angle for determining reflex angle according to the measurement result of the dynamic pressure transducer and the key phase
When reflex angle allowable, controls the part and open charge flow rate and lid side that air-breathing valve flow adjustment device adjusts cylinder axis side
Charge flow rate so that the reflex angle be greater than or equal to reflex angle allowable.
Preferably, the regulating system that monitors is according to the measurement knot of the dynamic pressure transducer and the key phase
Fruit calculates the piston force of compressor, and determines reflex angle according to the piston force.
Preferably, the control part open air-breathing valve flow adjustment device adjust the charge flow rate of cylinder axis side with
The charge flow rate of lid side includes: to control that the axis side section opens air-breathing valve flow adjustment device and lid side section opens suction respectively
Air valve flow regulator so that total charge flow rate in the cylinder is constant, and the charge flow rate of axis side be greater than lid side into
Throughput.
Preferably, total charge flow rate is the weighting of the charge flow rate of the axis side and the charge flow rate of the lid side
With.
Preferably, when the monitoring regulating system predefines the reciprocating compressor and runs under non-full load flow,
The charge flow rate of cylinder axis side in percentage and the charge flow rate of lid side, so that reflex angle is anti-more than or equal to allowable
To angle.
Preferably, the charge flow rate of predetermined cylinder axis side in percentage and the charge flow rate of lid side are stored in
In memory cell inside the monitoring regulating system.
The beneficial effects of the present invention are: by adjusting cylinder axis side charge flow rate and lid side charge flow rate, improve reversed
Angle numerical value avoids adverse effect of the reciprocating compressor flow control system to microcephaly's bearing shell etc., promotes reciprocating compressor operation
Stability；Regulating system is monitored by the measurement result of monitoring dynamic pressure transducer and key phase, realizes fault diagnosis
And alarm, and by the charge flow rate of the charge flow rate of adjustment axis side and lid side, realize microcephaly's bearing shell nonserviceable it is lower certainly
More function reduces the influence that failure runs reciprocating compressor, further improves stability.
Methods and apparatus of the present invention has other characteristics and advantages, these characteristics and advantages are attached from what is be incorporated herein
It will be apparent in figure and subsequent specific embodiment, or will be in the attached drawing being incorporated herein and subsequent specific reality
It applies in mode and is stated in detail, the drawings and the detailed description together serve to explain specific principles of the invention.
Detailed description of the invention
Exemplary embodiment of the invention is described in more detail in conjunction with the accompanying drawings, it is of the invention above-mentioned and its
Its purpose, feature and advantage will be apparent, wherein in exemplary embodiment of the invention, identical reference label
Typically represent same parts.
Fig. 1 shows the structure chart of reciprocating compressor flow control system according to an exemplary embodiment of the present invention.
Fig. 2 shows the multiple piston load curve synoptic diagrams of reciprocating compressor flow control system according to prior art.
Fig. 3 shows anti-with the reciprocating compressor flow control system of the prior art according to an exemplary embodiment of the present
To angle comparison diagram.
Appended drawing reference:
1, regulating system is monitored；2, dynamic pressure transducer；3, air-breathing valve flow adjustment device is partially opened；4, cylinder；
5, key phase；6, power mechanism.
Specific embodiment
The present invention will be described in more detail below with reference to accompanying drawings.Although showing preferred implementation side of the invention in attached drawing
Formula, however, it is to be appreciated that may be realized in various forms the present invention without that should be limited by the embodiments set forth herein.Phase
Instead, these embodiments are provided so that the present invention is more thorough and complete, and can be by the scope of the present invention completely
It is communicated to those skilled in the art.
Fig. 1 shows the structure chart of reciprocating compressor flow control system according to an exemplary embodiment of the present invention.Fig. 1 is aobvious
Show the flow control system applied to two-stage compressor, but in practical application, reciprocal pressure according to an embodiment of the present invention
Contracting machine flow control system can be applied to the compressor of any cylinder number, any number of stages, however it is not limited to situation shown in FIG. 1.
Reciprocating compressor flow control system according to an exemplary embodiment of the present invention may include: dynamic pressure transducer
2, including axis side dynamic pressure transducer and lid side dynamic pressure transducer, it is respectively used to the axis side of the cylinder 4 of measurement compressor
Dynamic pressure and lid side dynamic pressure；Key phase 5, for measuring the crank phase and speed of crankshaft of compressor；It pushes up part
Air-breathing valve flow adjustment device 3 is opened, including axis side section opens air-breathing valve flow adjustment device and lid side section opens inlet valve
Flow regulator, axis side section opens the 4 axis side of cylinder that air-breathing valve flow adjustment device is set to compressor, for adjusting gas
The charge flow rate of the axis side of cylinder 4, lid side section open the lid side that air-breathing valve flow adjustment device is set to the cylinder 4 of compressor,
For adjusting the charge flow rate of the lid side of cylinder 4；Regulating system 1 is monitored, for mutually sensing according to dynamic pressure transducer 2 with key
The measurement result of device 5 determines reflex angle, and when reflex angle is less than reflex angle allowable, control section opens inlet valve flow and adjusts dress
The charge flow rate of 3 adjusting cylinder, 4 axis side and the charge flow rate of lid side are set, so that reflex angle is greater than or equal to reflex angle allowable.
Reciprocating compressor flow control system accoding to exemplary embodiment is by adjusting 4 axis side charge flow rate of cylinder and lid
Side charge flow rate improves reflex angle numerical value, reciprocating compressor flow control system is avoided to propose the adverse effect of microcephaly's bearing shell etc.
Rise the stability of reciprocating compressor operation.
Specifically, 4 inner space of cylinder of reciprocating compressor is divided into two parts, close to the side of the cylinder head of cylinder 4
For lid side, the other side (i.e. close to the side of crankshaft) is axis side, dynamic pressure transducer 2 include axis side dynamic pressure transducer and
Lid side dynamic pressure transducer is respectively used to real-time measurement axis side dynamic pressure and lid side dynamic pressure, and transmits signals to
Monitor regulating system 1, in addition, dynamic pressure transducer 2 can also integrated installation partially open air-breathing valve flow adjustment device 3 or
Inside air inlet-exhaust valve.
Key phase 5 is mounted on compressor flywheel or other rotary parts, for measuring the crank phase of compressor
And speed of crankshaft, to obtain piston position.
It includes that axis side section opens air-breathing valve flow adjustment device and lid side that part, which opens air-breathing valve flow adjustment device 3,
Divide and open air-breathing valve flow adjustment device, axis side section opens 4 axis of cylinder that air-breathing valve flow adjustment device is set to compressor
Side, the charge flow rate of the axis side for adjusting cylinder 4, lid side section open air-breathing valve flow adjustment device and are set to compressor
The lid side of cylinder 4, the charge flow rate of the lid side for adjusting cylinder 4；Power mechanism 6 can receive the signal of monitoring regulating system,
And air-breathing valve flow adjustment device 3 is opened for part according to the signal and provides power to open or close part and open inlet valve stream
Quantity regulating device 3, power mechanism 6 can be used pneumatic, hydraulic, electronic or other driving method drive parts and open inlet valve flow
Regulating device 3.
It monitors regulating system 1 and reflex angle, In is determined according to the measurement result of dynamic pressure transducer 2 and key phase 5
Control section opens the charge flow rate that air-breathing valve flow adjustment device 3 adjusts 4 axis side of cylinder when reflex angle is less than reflex angle allowable
With the charge flow rate of lid side so that calculate reflex angle be greater than or equal to reflex angle allowable.More specifically, regulating system is monitored
The measurement result of 1 acquisition dynamic pressure transducer 2 and key phase 5, and piston force is calculated, it is then determined according to piston force anti-
To angle, when reflex angle is less than reflex angle allowable, control section opens air-breathing valve flow adjustment device 3 and adjusts 4 axis side of cylinder
The charge flow rate of charge flow rate and lid side, so that the reflex angle calculated is greater than or equal to reflex angle allowable.
In addition, monitoring regulating system 1 is also able to achieve automatic troubleshooting, calculates the unequal function of adjusting charge flow rate.
Monitoring regulating system 1 can be programmable controller (PLC) etc., while allow to modify program ginseng by way of remote data communication
Number monitors regulating system 1 according to the measurement of dynamic pressure transducer 2 and key phase 5 in reciprocating compressor operational process
As a result, automatic draw, analyze indicator card (pv diagram), according to the analysis of indicator card as a result, to components such as air valve, piston ring, fillers
Failure is diagnosed, is alarmed, if failure generates, system calculates the ginseng such as multiple piston load, reflex angle under this malfunction automatically
Number, if failure causes, multiple piston load is excessive or reflex angle is too small, passes through the charge flow rate of adjustment axis side and the inlet air flow of lid side
Amount, makes the parametric regressions normal level such as multiple piston load, reflex angle, it is ensured that the failure occurred does not involve the portions such as microcephaly's bearing shell
Part realizes the self-healing function under the components such as microcephaly's bearing shell are nonserviceabled, reduces the influence that failure runs reciprocating compressor,
Further improve stability.
In one example, regulating system 1 is monitored according to the measurement result of dynamic pressure transducer 2 and key phase 5
The piston force of compressor is calculated, and reflex angle is determined according to piston force.
In one example, control section open air-breathing valve flow adjustment device 3 adjust 4 axis side of cylinder charge flow rate with
The charge flow rate of lid side includes: that control shaft side section opens air-breathing valve flow adjustment device respectively and lid side section opens inlet valve
Flow regulator, so that total charge flow rate in cylinder 4 is constant, and the charge flow rate of axis side is greater than the charge flow rate of lid side.
In one example, the charge flow rate of the charge flow rate of axis side and lid side the sum of is weighted respectively as total charge flow rate.
Specifically, the present apparatus takes unequal adjusting method, makes the charge flow rate of the charge flow rate of axis side and lid side not phase
Deng that is, when reflex angle is less than reflex angle allowable, control section opens air-breathing valve flow adjustment device 3 and adjusts cylinder 4 axis side
The charge flow rate of charge flow rate and lid side, so that total charge flow rate in cylinder 4 is constant, (total charge flow rate is the inlet air flow of axis side
The weighted sum of amount and the charge flow rate of lid side), and the charge flow rate of axis side is greater than the charge flow rate of lid side, so that is calculated is reversed
Angle is greater than or equal to reflex angle allowable, wherein axis side charge flow rate and the weighting coefficient of lid side influent stream amount are according to cylinder 4 and piston
The design parameter of bar determines that this is that those skilled in the art are easy determination.
In one example, when monitoring regulating system 1 predefines reciprocating compressor and runs under non-full load flow, with
The charge flow rate of the 4 axis side of cylinder of percentages and the charge flow rate of lid side, so that reflex angle is anti-more than or equal to allowable
To angle.
In one example, the inlet air flow of the charge flow rate of predetermined 4 axis side of cylinder in percentage and lid side
Amount is stored in the memory cell inside monitoring regulating system 1.
Specifically, monitoring regulating system 1 is according to the structural parameters of reciprocating compressor (including cylinder diameter, diameter of piston rod, stroke
Deng) and technological parameter (including inlet and outlet pressure, operating temperature etc.), in conjunction with formula (1)-(19), calculating piston force draws piston
Force curve, and reflex angle is calculated according to curve；When reflex angle is less than reflex angle allowable, control section opens inlet valve stream
Quantity regulating device 3 adjusts the charge flow rate of 4 axis side of cylinder and the charge flow rate of lid side, and the charge flow rate of axis side is greater than lid side
Charge flow rate calculates the piston force under the flow, and determines reflex angle according to piston force, so that reflex angle is more than or equal to allowable
Reflex angle.Monitoring regulating system 1 records the charge flow rate of the axis side in percentage at each flow and the charge flow rate of lid side,
And it is stored in the memory cell inside monitoring regulating system 1, when reflex angle is less than reflex angle allowable, call the air inlet of storage
Flow, so that reflex angle is greater than or equal to reflex angle allowable.
Using example
Concrete application example is given below in the scheme and its effect of embodiment of the present invention for ease of understanding.This field skill
Art personnel should be understood that the example only for the purposes of understanding the present invention, and any detail is not intended to be limited in any way
The present invention.
1. prior art example
By taking the make-up hydrogen compressor of certain domestic Petrochemical Enterprises as an example, concrete model 4M80-33.3/20-175, revolving speed is
300rpm, four column, four cylinder three-level.
Reflex angle is obtained by multiple piston load numerical statistic.It is normal full negative in a cycle of reciprocating compressor work
Multiple piston load can be calculated according to following six process under lotus state: the expansion of lid side, axis side compression, lid side air-breathing, axis side
Compression, lid side air-breathing, the exhaust of axis side, lid side compression, the expansion of axis side, lid side compression, axis side air-breathing, the exhaust of lid side, axis side air-breathing.
In lid side in the case where expansion, axis side compression, multiple piston load are as follows:
Fp=-AG×Pe+AZ×Pc+FI (1)
Wherein, FpIndicate multiple piston load, AGIndicate lid side piston area, AZIndicate axis side piston area, PeIndicate gas
The bulbs of pressure, PcIndicate gas compression pressure, FIIndicate reciprocal inertia force；
In lid side in the case where air-breathing, axis side compression, multiple piston load are as follows:
Fp=-AG×Ps+AZ×Pc+FI (2)
Wherein, PsIndicate gas suction pressure, remaining parameter is identical as formula (1) meaning, is not repeated to describe below；
In lid side in the case where air-breathing, the exhaust of axis side, multiple piston load are as follows:
Fp=-AG×Ps+AZ×Pd+FI (3)
Wherein, PdIndicate gas exhaust pressure；
In the case where lid side compression, axis side expand, multiple piston load are as follows:
Fp=-AG×Pc+AZ×Pe+FI(4)；
In the case where lid side compression, axis side air-breathing, multiple piston load are as follows:
Fp=-AG×Pc+AZ×Ps+FI(5)；
In lid side in the case where exhaust, axis side air-breathing, multiple piston load are as follows:
Fp=-AG×Pd+AZ×Ps+FI(6)；
Wherein, gas compression state power are as follows:
Pc×(xi+S0)n=Ps×(S+S0)n (7)
Wherein, xiIndicate piston position coordinate, S0Indicate that piston clearance stroke, n indicate multi-party cake compressibility, S indicates piston
Stroke；
Gas expansion state power are as follows:
Pe×(xi+S0)m=Pd×Sn (8)
Wherein, m indicates expansion process index；
Lid side position coordinate are as follows:
Wherein, r indicates that crank throw, γ indicate crank to connecting rod length ratio, θiIndicate crank angle；
Axis side position coordinate are as follows:
Reciprocal inertia force are as follows:
FI=msrω2(cosθi+γcos2θi) (11)
Wherein, msIndicate reciprocating mass, wherein reciprocating mass contains the quality of all reciprocating parts
With, such as piston, piston rod, crosshead, ω expression angular velocity of crankshaft；θiIndicate crank angle.
By formula (1)-(11), the multiple piston load under compressor full load condition can be calculated, draws comprehensive piston
Force curve.Under full load condition, the reflex angle of the compressor three-stage cylinder is 90 degree, meets related request.
Air-breathing valve system is opened using the part of the prior art, gas successively undergoes expansion, air-breathing, reflux, compression
With five processes of exhaust, multiple piston load is calculated according to following formula (12)-(19).
In formula (12)-(19), the meaning of each parameter is identical with formula (1)-(11).
According to the structural parameters (cylinder bore, diameter of piston rod, stroke etc.) of reciprocating compressor, technological parameter (inlet and outlet
Pressure, operating temperature etc.), by formula (1)-(19), the multiple piston load in the case of average adjusted under each flow can be calculated,
Plunger force curves are drawn, as shown in Fig. 2, crankshaft angles corresponding to axis of ordinates positive portions are reflex angle in Fig. 2.Root
Reflex angle can be obtained according to the curve of Fig. 2, reversed angular data is as shown in table 1.
Table 1
The part of the prior art opens air-breathing valve system using average adjusted method, that is, is directed to cylinder head side and axis side
Ratio is adjusted using identical flow.By table 1 and Fig. 2 it is found that with flow value reduction, reflex angle show it is first stable, after
The trend reduced rapidly, and two-part, discrete phenomenon are showed, when flow value is less than 70%, reflex angle is lower than allowable
Value, may cause the failure that microcephaly's bearing shell is burnt.
2. the present invention applies example
Fig. 3 is indicated to be compared with the reflex angle of the reciprocating compressor flow control system of the prior art according to the present invention
Figure.In this application example, the structural parameters (cylinder diameter, diameter of piston rod, stroke etc.) of reciprocating compressor are it is known that according to desired
Technological parameter (inlet and outlet pressure, operating temperature etc.), can precalculate under desired operating condition, correspond to it is each it is non-at full capacity
Flow, axis side and lid side operating pressure in each stage cylinder 4 of pistons work, and then calculated according to formula (12)-(19)
Piston force calculates the reflex angle under each flow.
If the reflex angle calculated under a certain flow is less than reflex angle allowable, setting reciprocating compressor is non-full at this
The charge flow rate of axis side when being run under load flow and the charge flow rate (in percentage) of lid side, until the reflex angle of calculating
More than or equal to reflex angle allowable.
When the charge flow rate of setting shaft side and the charge flow rate of lid side, can pre-select initial axis side charge flow rate with
Lid side charge flow rate, then calculates reflex angle, can be initial by this if the reflex angle calculated is greater than or equal to reflex angle allowable
Axis side charge flow rate and lid side charge flow rate as the charge flow rate of axis side used by unequal adjust and the air inlet of lid side
Flow, it is on the contrary then adjust the initial axis side charge flow rate and lid side charge flow rate, until the reflex angle of calculating is greater than or equal to
Until reflex angle allowable.
In this example, when flow value is lower than 80%, the charge flow rate of setting 4 axis side of cylinder is greater than the inlet air flow of lid side
It measures (in percentage), then calculates the piston force under the flow according to formula (12)-(19), and determine reversely according to piston force
Angle, so that reflex angle is greater than or equal to reflex angle allowable, reversed angular data is as shown in table 2.
Table 2
The charge flow rate of axis side in percentage under predetermined non-full load flow and the charge flow rate of lid side
It is stored in the memory cell inside monitoring regulating system 1.In reciprocating compressor operation, when according to the present invention reciprocal
When compressor flowrate regulating system determines that reflex angle is less than reflex angle allowable, monitoring regulating system 1, which can call directly, to be stored in
Charge flow rate in percentage in memory cell, and then control shaft side section opens air-breathing valve flow adjustment device respectively
Air-breathing valve flow adjustment device adjustment axis side charge flow rate and lid side charge flow rate are opened with lid side section, so that reflex angle
More than or equal to reflex angle allowable.
In above process, since reciprocating compressor flow control system is according to the structural parameters and technological parameter of compressor
Charge flow rate in percentage is predefined, unexpected failure is likely to occur in actual moving process or other are prominent
Heat condition, and cause still make reflex angle be greater than reflex angle allowable according to the progress flow adjusting of predetermined charge flow rate.
In this case, piston force, and root are dynamically calculated by the measurement result of dynamic pressure transducer 2 and key phase 5
Determine reflex angle according to piston force, reflex angle be less than reflex angle allowable when, according to actual measured results amendment it is pre-stored into
Throughput, control section open air-breathing valve flow adjustment device 3 and adjust the charge flow rate of cylinder axis side and the charge flow rate of lid side,
So that reflex angle is greater than or equal to reflex angle allowable.
In conclusion reflex angle numerical value can be improved by adjusting 4 axis side charge flow rate of cylinder and lid side charge flow rate,
To avoid adverse effect of the reciprocating compressor flow control system to microcephaly's bearing shell etc..
It should be noted that for the existing system for being not equipped with in-cylinder pressure sensor, it can be according in application example
The method, will be in preset charge flow rate input system in percentage.But this method cannot root
It is adjusted at any time according to the real-time pressure in cylinder to optimum state or improves fault state, be primarily adapted for use in transformation and do not have in-cylinder pressure
The existing part of sensor opens air-breathing valve system.
The embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is also not necessarily limited to disclosed each embodiment.It is right without departing from the scope and spirit of illustrated each embodiment
Many modifications and changes are obvious for those skilled in the art.The choosing of term used herein
It selects, it is intended to best explain the principle, practical application or the improvement to the technology in market of each embodiment, or make this technology
Other those of ordinary skill in field can understand each embodiment disclosed herein.
Claims (5)
1. a kind of reciprocating compressor flow control system, comprising:
Dynamic pressure transducer, including axis side dynamic pressure transducer and lid side dynamic pressure transducer are respectively used to measurement institute
State the axis side dynamic pressure and lid side dynamic pressure of the cylinder of compressor；
Key phase, for measuring the crank phase and speed of crankshaft of the compressor；
Part opens air-breathing valve flow adjustment device, including axis side section opens air-breathing valve flow adjustment device and lid side section top
Air-breathing valve flow adjustment device is opened, the axis side section opens the cylinder that air-breathing valve flow adjustment device is set to the compressor
Axis side, the charge flow rate of the axis side for adjusting the cylinder, the lid side section open the setting of air-breathing valve flow adjustment device
In the lid side of the cylinder of the compressor, the charge flow rate of the lid side for adjusting the cylinder；
Regulating system is monitored, it is reversed for being determined according to the measurement result of the dynamic pressure transducer and the key phase
Angle controls the part and opens air-breathing valve flow adjustment device adjusting cylinder axis when the reflex angle is less than reflex angle allowable
The charge flow rate of side and the charge flow rate of lid side, so that the reflex angle is greater than or equal to reflex angle allowable；
Wherein, the control part opens charge flow rate and the lid side that air-breathing valve flow adjustment device adjusts cylinder axis side
Charge flow rate includes:
Control that the axis side section opens air-breathing valve flow adjustment device and lid side section opens inlet valve flow and adjusts dress respectively
It sets, so that total charge flow rate in the cylinder is constant, takes unequal adjusting method, make the charge flow rate of axis side and lid side
Charge flow rate is unequal, and the charge flow rate of axis side is greater than the charge flow rate of lid side.
2. reciprocating compressor flow control system according to claim 1, wherein the monitoring regulating system is according to
The measurement result of dynamic pressure transducer and the key phase calculates the piston force of compressor, and true according to the piston force
Determine reflex angle.
3. reciprocating compressor flow control system according to claim 1, wherein total charge flow rate is the axis side
Charge flow rate and the lid side charge flow rate weighted sum.
4. reciprocating compressor flow control system according to claim 1, wherein the monitoring regulating system predefines
When the compressor is run under non-full load flow, the charge flow rate of cylinder axis side in percentage and the inlet air flow of lid side
Amount, so that reflex angle is greater than or equal to reflex angle allowable.
5. reciprocating compressor flow control system according to claim 4, wherein predetermined gas in percentage
The charge flow rate of cylinder shaft side and the charge flow rate of lid side are stored in the memory cell inside the monitoring regulating system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710108665.8A CN108506199B (en) | 2017-02-27 | 2017-02-27 | Reciprocating compressor flow control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710108665.8A CN108506199B (en) | 2017-02-27 | 2017-02-27 | Reciprocating compressor flow control system |
Publications (2)
| Publication Number | Publication Date |
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| CN109408869B (en) * | 2018-09-12 | 2019-08-23 | 西安交通大学 | A kind of reciprocating compressor selection designing method |
| CN110500268B (en) * | 2019-07-30 | 2020-12-08 | 江西资生科技有限公司 | Reciprocating compressor reverse angle detection system based on indicator diagram |
| CN111472961A (en) * | 2020-02-26 | 2020-07-31 | 无锡康茨压缩机配件与系统有限公司 | Stepless air quantity regulation load control method for compressor by adopting side regulation |
| CN111980881A (en) * | 2020-08-25 | 2020-11-24 | 中国煤炭科工集团太原研究院有限公司 | Novel air compressing device for coal mine explosion-proof diesel engine |
| CN113931829B (en) * | 2021-09-14 | 2024-02-02 | 北京化工大学 | Load distribution-based reciprocating machinery optimization regulation and control method |
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