CN100549423C - Screw compressor and method of operation thereof - Google Patents
Screw compressor and method of operation thereof Download PDFInfo
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- CN100549423C CN100549423C CNB2004100079005A CN200410007900A CN100549423C CN 100549423 C CN100549423 C CN 100549423C CN B2004100079005 A CNB2004100079005 A CN B2004100079005A CN 200410007900 A CN200410007900 A CN 200410007900A CN 100549423 C CN100549423 C CN 100549423C
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- 238000001514 detection method Methods 0.000 claims abstract description 29
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- 230000007246 mechanism Effects 0.000 claims description 28
- 210000000056 organ Anatomy 0.000 claims description 8
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- 230000015572 biosynthetic process Effects 0.000 description 2
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- 238000007906 compression Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
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- 230000000052 comparative effect Effects 0.000 description 1
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Abstract
Screw compressor of the present invention is provided with controller, based on the 1st pressure of the 1st press detection sensor detection that is located at close the compressor main body exhaust port of discharging stream and the 1st setting pressure the 1st rotating speed of drive motor is carried out computing; The 2nd pressure that detects based on the 2nd press detection sensor of the supply target that is located at above-mentioned discharge stream and the 2nd setting pressure are carried out computing to the 2nd rotating speed of drive motor; The 1st rotating speed of being calculated by computing and the size of the 2nd rotating speed are compared, will make the rotary speed instruction of drive motor rotation output to the transducer of controlling and driving motor rotary speed with a little side's rotating speed.Adopt this structure, even change, also can remain on desirable force value, and prevent the damage of the screw compressor that causes by surpassing that the pressure that needs rises with arriving the compressed-air actuated pressure of supplying with target because of the machine kind that is installed at the screw compressor exhaust port downstream side of discharging stream makes the pressure loss.
Description
Technical field
The present invention relates to screw compressor and method of operation thereof, this compressor is that the rotating speed of the drive motor that drives of the helical rotor to compressor main body is controlled, pressurized gas supplied to supply with target.
Background technique
Rotating speed as the known drive motor that a pair of negative and positive helical rotor that constitutes compressor main body is driven is controlled, pressurized gas is supplied to screw compressor and the method for operation thereof of supplying with target, just like the screw compressor structure that contains control system shown in the skeleton diagram of Fig. 2.
Below, with reference to Fig. 2 the formation of the screw compressor of above-mentioned conventional example on one side be described on one side.Promptly, the screw compressor of this conventional example has: filter by suction 1, the compressor main body 2 that the air in the atmosphere is sucked via suction port (air inlet) 21, the pressurized gas (pressurized air) of discharging from the exhaust port 22 of this compressor main body 2 is supplied to the pressurized air supply stream 3 that not shown air is supplied with target.Below, part that above-mentioned pressurized air is supplied with the exhaust port 22 more close downstream sides of the ratio piston compressor main body 2 in the stream 3 abbreviates the discharge stream as.
The not shown helical rotor of above-mentioned compressor main body 2 is by shaft coupling, make its rotation by drive motor 6.And the running of this drive motor 6, promptly, the running of compressor main body 2 then undertaken by the motor control device 10 that controller 11 with following function and transducer 12 constitute; Above-mentioned transducer 12 are inputs from the rotary speed instruction of this controller 11 outputs, with the rotating speed of above-mentioned drive motor 6 be controlled to based on the rotary speed instruction that is transfused to and must rotating speed consistent.Symbol 7 is power supplys of representing electric power is supplied with above-mentioned transducer 12, and this electric power makes drive motor 6 be rotated by the rotating speed of rotary speed instruction.
Supply with the above-mentioned compressor main body 2 of stream 3 and oil at above-mentioned pressurized air and separate between the recover and be provided with press detection sensor (Pressure testing mechanism) 13, be used for detecting the compressed-air actuated head pressure that compression volume at compressor main body 2 is compressed and discharge from the exhaust port 22 of this compressor main body 2; Head pressure Pd is input to the controller 11 of said motor control device 10 from above-mentioned press detection sensor 13.And controller 11 has function as described below, promptly, by the head pressure Pd of input, the power of drive motor 6 become a maximum speed Nmax that regularly can turn round carry out computing, because setting pressure Pc that will be transfused to and the deviation of above-mentioned head pressure Pd are taken as 0, thereby calculate rotational speed N PID by PID (proportion integration differentiation) computing, when rotational speed N PID＜rotational speed N max, rotational speed N max outputed to as rotary speed instruction N be used for transducer 12 that the drive motor 6 of Driven Compressor main body 2 is controlled.
Screw compressor according to above-mentioned formation, needn't be provided with the high price flow transducer, only be provided with common usefulness press detection sensor, based on the detected head pressure of this press detection sensor the rotating speed of compressor main body is controlled, just can control the pressure and the air quantity (for example, opening the 2003-3975 communique) of exhausting air accurately with reference to the spy.
As mentioned above, in the screw compressor of above-mentioned conventional example, near the exhaust port of the compressor main body of discharging stream, 1 press detection sensor that is used to detect the compression pressure that flows through this part is set, utilizes the force value that this 1 press detection sensor detects and determine the rotating speed of drive motor.
But, open in the 2003-3975 communique the spy, putting down in writing as described above be provided with the oil that does not have expression among the figure separate recover like that, under the situation of common screw compressor, between the target of the final supply of the exhaust port of the compressor main body of discharging stream and pressurized gas, add various machines mostly.
As above-mentioned machine kind, except oil separates recover, also can exemplify valve, dehumidifier or filter etc.The pressure that supplies to the pressurized gas of supplying with target from the exhaust port of compressor main body via so various machines just forms near the also low low pressure of pressure that is detected than the compressor main body exhaust port of discharging stream thus because of the flow path resistance of various machines forms the pressure loss.If promptly, the value of above-mentioned setting pressure Pc is not also taken the caused pressure loss of the flow path resistance of above-mentioned various machine into account and is carried out suitable setting, such problem is then arranged, promptly, to be difficult to make the pressure that arrives the pressurized gas of supplying with target be desirable force value.
The pressure loss that produces owing to the machine kind is along with the compressed gas flow that flows through these machines (flow velocity) changes, thereby the value of above-mentioned setting pressure Pc is to be difficult to suitably set.When on the basis of the maximum pressure loss of imagination, carrying out the setting of setting pressure Pc because this establishing method can produce excessive energy loss naturally, thereby from save viewpoint of energy, this establishing method also is bad.
Set up a press detection sensor even structure made in the downstream side of the various machines of discharging stream, utilize its detected force value to decide the rotating speed of drive motor, also have following problem, promptly, the value of the pressure loss that changes along with the compressed gas flow that flows through various machines is difficult to determine.Therefore, when a detected force value of press detection sensor being located at the downstream side of the various machines of discharging stream in utilization decides the rotating speed of drive motor, just can make the screw compressor running with the pressure of the rated pressure that surpasses the pressurized gas that is discharged from (bring inappropriate pressure maximum can not for the whole members that constitute screw compressor).
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of screw compressor and method of operation thereof, more particularly, even providing a kind of pressure loss that produces because of the machine kind that is installed at the compressor main body exhaust port downstream side of discharging stream, to change, also can make the pressure that arrives the pressurized gas of supplying with target be desirable pressure, can not produce owing to exceed screw compressor and the method for operation thereof that the pressure rising of needs forms excessive energy loss or makes problems such as constituent part is improper.
The present invention makes in view of above-mentioned actual conditions, for the screw compressor that addresses the above problem, the present invention adopts be with pressurized gas from the exhaust port of compressor main body, supply to the screw compressor of supplying with target by discharging stream, constitute by following member: the drive motor that the helical rotor that constitutes compressor main body is driven; The motor controller that the rotating speed of above-mentioned drive motor is controlled; Be arranged near the above-mentioned exhaust port of above-mentioned discharge stream, detect the 1st Pressure testing mechanism of the pressure of pressurized gas; Be arranged on the above-mentioned discharge stream on the position than the more approaching above-mentioned supply target of above-mentioned the 1st Pressure testing mechanism, detect the 2nd Pressure testing mechanism of the pressure of pressurized gas; Be equivalent to the arithmetical organ that the signal of the pressure that above-mentioned the 1st Pressure testing mechanism and above-mentioned the 2nd Pressure testing mechanism detected is imported; Wherein, the 2nd pressure that detected of above-mentioned arithmetical organ the 1st pressure, the 1st setting pressure that is set, above-mentioned the 2nd Pressure testing mechanism detected based on above-mentioned the 1st Pressure testing mechanism and the 2nd setting pressure that is set, preferentially carry out so that the control that it is target that above-mentioned the 1st pressure is no more than above-mentioned the 1st setting pressure, make above-mentioned the 2nd pressure and above-mentioned the 2nd setting pressure as one man the rotating speed of above-mentioned drive motor be carried out computing simultaneously, in the mode that this rotating speed is rotated control signal is outputed to the said motor control device with above-mentioned drive motor.
Wherein, it is the control of target that what is called preferentially makes the 1st pressure be no more than the 1st setting pressure, the 2nd pressure and the 2nd setting pressure are as one man controlled be meant under the 1st pressure is no more than the situation of the 1st setting pressure, the 2nd pressure control Cheng Yudi 2 setting pressures are consistent, to surpass under the situation of the 1st setting pressure at the 1st pressure, more preferably the 1st pressure control be become to be no more than the 1st setting pressure than the control of the 2nd pressure.
In the screw compressor of the invention described above, above-mentioned arithmetical organ is based on above-mentioned the 1st pressure and the 1st setting pressure and the 1st rotating speed of above-mentioned drive motor is carried out computing, simultaneously the 2nd rotating speed of above-mentioned drive motor is carried out computing based on above-mentioned the 2nd pressure and the 2nd setting pressure, and, make above-mentioned drive motor rotatably control signal be outputed to the said motor control device with the rotating speed of the low side in the 1st above-mentioned rotating speed and above-mentioned the 2nd rotating speed.
In the screw compressor of the invention described above, the switching mechanism that is connected with above-mentioned arithmetical organ can be set, can change in above-mentioned the 1st setting pressure and/or above-mentioned the 2nd setting pressure by the operation of this switching mechanism.
The method of operation of screw compressor of the present invention adopts is that the rotating speed of drive motor that the helical rotor that constitutes compressor main body is driven is controlled, pressurized gas supplied to the method for operation of the screw compressor of supplying with target via discharging stream from the exhaust port of above-mentioned compressor main body, detects near the pressure of the pressurized gas the above-mentioned exhaust port of above-mentioned discharge stream and as the 1st pressure; Detect on the above-mentioned discharge stream than the pressure of the locational pressurized gas of the more close above-mentioned supply target in detection position of above-mentioned the 1st pressure and as the 2nd pressure; In above-mentioned the 1st pressure is no more than the scope of above-mentioned the 1st setting pressure, make above-mentioned the 2nd pressure and above-mentioned the 2nd setting pressure as one man control the rotating speed of above-mentioned drive motor.
In the method for operation of the screw compressor of the invention described above, can obtain the 1st rotating speed of above-mentioned drive motor based on above-mentioned the 1st pressure and above-mentioned the 1st setting pressure; Obtain the 2nd rotating speed of above-mentioned drive motor based on above-mentioned the 2nd pressure and above-mentioned the 2nd setting pressure, control the rotating speed of above-mentioned drive motor with the rotating speed of the low side in above-mentioned the 1st rotating speed and above-mentioned the 2nd rotating speed.
In the method for operation of the screw compressor of the invention described above, preferably making above-mentioned the 1st setting pressure is the rated pressure of above-mentioned compressor main body, makes above-mentioned the 2nd setting pressure for supplying with the desired pressure arbitrarily of target.
Description of drawings
Fig. 1 is the skeleton diagram of the oil-flooded screw formula compressor arrangement that contains control system of expression embodiment of the present invention.
Fig. 2 is the skeleton diagram of the oil-flooded screw formula compressor arrangement that contains control system of expression conventional example.
Embodiment
Below, the screw compressor of the method for operation of implementing screw compressor of the present invention is described with reference to accompanying drawing.Fig. 1 is the skeleton diagram that expression contains the oil-flooded screw formula compressor arrangement of control system.Because it all is consistent that the screw compressor of present embodiment has many structures with the screw compressor of conventional example, thereby identical (near the press detection sensor 13 being arranged on the compressor main body exhaust port) part all uses identical symbol to be illustrated.
Promptly, the screw compressor of present embodiment has filter by suction 1, the compressor main body 2 that the air in the atmosphere sucked via suction port (air inlet) 21, the pressurized gas (pressurized air) of discharging from the exhaust port 22 of this compressor main body 2 is supplied to the pressurized air supply stream 3 that not shown air is supplied with target.The not shown helical rotor of above-mentioned compressor main body 2 is by shaft coupling, makes its rotation by drive motor 6.And the running of this drive motor 6, promptly, the running of compressor main body 2 is to be carried out by the motor control device 10 that controller 11 with following function and transducer 12 constitute with being controlled; Above-mentioned transducer 12 are inputs from the rotary speed instruction of this controller 11 outputs, the above-mentioned drive motor 6 of rotation so that its rotating speed with consistent based on the rotating speed of the rotary speed instruction gained of importing.Symbol 7 is that expression is supplied with the power supply of above-mentioned transducer 12 with electric power, and this electric power makes drive motor 6 rotate by the rotating speed of rotary speed instruction.
Extend on the discharge stream of supplying with target from the exhaust port 22 of above-mentioned compressor main body 2, installing various machines such as valve 30, dehumidifier 31, filter 32 additional.And near the position exhaust port 22 of the compressor main body 2 of discharging stream, promptly the 1st press detection sensor 33 (the 1st press detection sensor is equivalent to the press detection sensor 13 of conventional example) as the 1st Pressure testing mechanism is being set between the exhaust port 22 of compressor main body 2 and valve 30, be used to detect the pressure of the pressurized gas that on this part, flows through.And, on the positions discharge stream,, the 2nd press detection sensor 34 being set than above-mentioned the 1st press detection sensor 33 more close air supply targets, it is used to detect the pressure of the pressurized gas that flows through on this part.Then be input to the controller 11 of said motor control device 10 respectively from the signal suitable of above-mentioned press detection sensor 33,34 outputs with detected pressures.
Above-mentioned controller 11 has such function, promptly, by the PID computing, detect according to above-mentioned the 1st press detection sensor 33 and also from the 1st pressure (head pressure) Pd of the pressurized gas of the 1st press detection sensor 33 inputs, the deviation of calculating the 1st setting pressure SV1 that makes setting and above-mentioned the 1st pressure P d is the 1st rotational speed N 1 of 0 drive motor 6.
Above-mentioned controller 11 also has such function, promptly, by the PID computing, detect according to above-mentioned the 2nd press detection sensor 34 and also from the 2nd pressure P lin of the pressurized gas of the 2nd press detection sensor 34 inputs, the deviation of calculating the 2nd setting pressure SV2 that makes setting and above-mentioned the 2nd pressure P lin is the 2nd rotational speed N 2 of 0 drive motor 6.In addition, above-mentioned controller 11 also has such function, promptly, by the PID computing, each rotational speed N 1 of calculating, the size of N2 are compared computing, and according to their comparative result, rotary speed instruction is outputed to transducer 12, thus the rotating speed of drive motor 6 is controlled.
On above-mentioned controller 11, connecting not shown switching mechanism.
The user of screw compressor can be altered to the desired any pressure of supply target with above-mentioned the 2nd setting pressure SV2 by the operation to above-mentioned switching mechanism.But, the pressure of the specification limit suitable with the ability of compressor main body 2 has been prescribed, and can not above-mentioned the 2nd setting pressure SV2 be altered to upper pressure limit above this specification limit with above-mentioned switching mechanism.Here, the 1st setting pressure SV1 make can not change by the operation of switching mechanism, be in advance in the inside of above-mentioned controller 11, be set at the rated pressure of compressor main body 2 regularly.
If according to by controller 11, above-mentioned the 1st rotational speed N 1 running compressor main body 2 of calculating by the PID computing, above-mentioned the 1st pressure P d that then is input to controller 11 just near above-mentioned the 1st setting pressure SV1 that is set, promptly approaching above-mentioned compressor main body 2 rated pressure and be adjusted to identical value.On the other hand, if according to by controller 11, above-mentioned the 2nd rotational speed N 2 running compressor main bodies 2 of calculating by the PID computing, above-mentioned the 2nd pressure P lin that then is input to controller 11 is just near any pressure of user's setting and near the 2nd setting pressure SV2 of the pressure of compressor main body 2 specification limits and be adjusted to identical value.
So the 2nd pressure P lin sum that the pressure loss of various machines and the 2nd press detection sensor 34 detect is restricted to and is not more than the littler than the 1st rotational speed N 1 side of rated pressure, the 2nd rotating speed.
Like this, screw compressor according to present embodiment, 11 pairs of the 1st rotational speed N of being calculated by the PID computing 1 of above-mentioned controller and the size of the 2nd rotational speed N 2 compare computing, make drive motor 6 rotate instruction be outputed to transducer 12 according to the rotating speed of the low side in these the 1st rotational speed N 1 and the 2nd rotational speed N 2 with being rotated.At this moment, if in the specification limit of screw compressor, because drive motor 6 is being rotated than the 1st rotational speed N 1 the 2nd little rotational speed N 2, thus concerning the user, most important the 2nd pressure can be made with remaining on desirable force value compressor turn round, can prevent variation by the pressure loss form, by the caused fault of the excess load of compressor.
In the screw compressor of conventional example, owing to the pressure loss of various machines can change because of the factor of timeliness and be changed by load condition, thereby be the scope of measuring variation in advance, preestablish the pressure also higher than the pressure of necessity.If but the screw compressor of employing present embodiment, because as long as within the specification limit, just can be with the 2nd pressure control one-tenth certain pressure in desired scope, thereby the setting of pressure can be dropped to needed inferior limit, can save energy thus.
But the pressure loss of various machines and the 2nd pressure P lin sum that detected by the 2nd press detection sensor 34 are greater than rated pressure sometimes.Under this occasion, because the 1st rotational speed N 1 is littler than the 2nd rotational speed N 2 certainly, thereby drive motor 6 is just by the rotary speed instruction of transducer 12, be rotated with the 1st rotational speed N 1.At this moment, because the 1st pressure does not surpass the rated pressure of compressor main body 2, thereby can prevent the fault that causes by the excess load of screw compressor, and concerning the user, can not compressor be turned round most important the 2nd pressure with being held in desirable force value.But, through the various machines of inspection flow path resistance increase, promptly no matter the various machines of any fault take place, suitably to keep in repair as required simultaneously, this problem just can solve.
The control computing of carrying out in controller 11 of the present invention is not limited to mode recited above.When preferentially carrying out being no more than the control that the 1st setting pressure is a target, make the control consistent of the 2nd pressure as long as mainly be with the 2nd setting pressure with the 1st pressure.Promptly, be no more than under the situation of the 1st setting pressure, the 2nd pressure and the 2nd setting pressure are as one man controlled at the 1st pressure; Surpass under the situation of the 1st setting pressure at the 1st pressure, more preferably make the 1st pressure be no more than the control of the 1st setting pressure than the 2nd pressure control.
For example, obtain the 2nd above-mentioned rotational speed N 2 earlier, under above-mentioned the 1st pressure P d is situation below above-mentioned the 1st setting pressure SV1, with N2 intactly as rotary speed instruction with respect to transducer 12; Surpass under the situation of above-mentioned the 1st setting pressure SV1 at above-mentioned the 1st pressure P d, available following formula is obtained the rotary speed instruction N with respect to transducer 12.
The PI operation values that N=N2-{ is relevant with (Pd-SV1) }
For example under the situation of SV1-Pd greater than specified value (promptly, Pd compares with SV1, Pd is abundant little situation) can carry out after the computing the 2nd above-mentioned rotational speed N 2, with it as rotary speed instruction to transducer 12; At SV1-Pd during (, Pd near SV1 or Pd situation) above SV1 less than the value of regulation, can carry out after the computing the 2nd above-mentioned rotational speed N 2, with it as rotary speed instruction to transducer 12.
In the superincumbent explanation, the 1st setting pressure SV1 does not change because of the operation of switching mechanism, be the rated pressure of the compressor main body set of inside, the predetermined fixed ground at above-mentioned controller 11, but the present invention is not limited to this mode.
The 1st setting pressure SV1 also can similarly be changed by the operation of switching mechanism with the 2nd setting pressure SV2.
Above, this mode of structure is illustrated, promptly, the exhaust port 22 and being provided with of the 1st press detection sensor 33 of the compressor main body 2 of discharging stream any machine is not installed between the position, but the present invention is not limited to this mode.That is to say, so long as do not produce the various machines that the special pressure loss, the pressure loss do not keep certain to the compressed gas flow effect or can hold the pressure losses that change because of the compressed gas flow difference in advance thereupon, can be installed at and discharge the exhaust port 22 of stream and being provided with between the position of the 1st press detection sensor 33.And so long as above-mentioned various machines, can be installed at the position is set and supplies with between the target of the 2nd press detection sensor 34 of discharging stream.
As top detailed description the in detail, according to screw compressor of the present invention and controlling method thereof, even extend to the pressure loss that the machine kind on the exhaust port downstream side of the discharge stream of supplying with target produces from the exhaust port of compressor main body and change because of being installed at, also can make the pressure that arrives the pressurized gas of supplying with target remain on desirable force value.Rise owing to can prevent the pressure that surpass to need, so can prevent excessive energy loss or break down because of the machine kind.
Claims (7)
1. screw compressor supplies to supply target from the exhaust port of compressor main body via discharging stream with pressurized gas, it is characterized in that, is made of following member: the drive motor that the helical rotor that constitutes compressor main body is driven; The motor control device that the rotating speed of above-mentioned drive motor is controlled; Be arranged near the above-mentioned exhaust port of above-mentioned discharge stream, detect the 1st Pressure testing mechanism of the pressure of pressurized gas; Be arranged on the above-mentioned discharge stream on the position than the more approaching above-mentioned supply target of above-mentioned the 1st Pressure testing mechanism, detect the 2nd Pressure testing mechanism of the pressure of pressurized gas; Be equivalent to the arithmetical organ that the signal of the pressure that above-mentioned the 1st Pressure testing mechanism and above-mentioned the 2nd Pressure testing mechanism detected is imported;
Wherein, the 2nd pressure that detected of above-mentioned arithmetical organ the 1st pressure, the 1st setting pressure that is set, above-mentioned the 2nd Pressure testing mechanism detected based on above-mentioned the 1st Pressure testing mechanism and the 2nd setting pressure that is set, preferentially carry out so that the control that it is target that above-mentioned the 1st pressure is no more than above-mentioned the 1st setting pressure, make above-mentioned the 2nd pressure and above-mentioned the 2nd setting pressure as one man the rotating speed of above-mentioned drive motor be carried out computing simultaneously, in the mode that this rotating speed is rotated control signal is outputed to the said motor control device with above-mentioned drive motor.
2. screw compressor as claimed in claim 1, it is characterized in that, above-mentioned arithmetical organ is based on above-mentioned the 1st pressure and the 1st setting pressure and the 1st rotating speed of above-mentioned drive motor is carried out computing, simultaneously the 2nd rotating speed of above-mentioned drive motor is carried out computing based on above-mentioned the 2nd pressure and the 2nd setting pressure, and, make above-mentioned drive motor rotatably control signal be outputed to the said motor control device with the rotating speed of the low side in the 1st above-mentioned rotating speed and above-mentioned the 2nd rotating speed.
3. screw compressor as claimed in claim 1 is characterized in that, the switching mechanism be connected with above-mentioned arithmetical organ is set, and can change at least one side in above-mentioned the 1st setting pressure and above-mentioned the 2nd setting pressure by the operation of this switching mechanism.
4. screw compressor as claimed in claim 1 is characterized in that, in above-mentioned discharge stream, at the position that is provided with above-mentioned the 1st Pressure testing mechanism be provided with and add the machine that produces the pressure loss between the position of above-mentioned the 2nd Pressure testing mechanism.
5. the method for operation of a screw compressor, this method is that the rotating speed of the drive motor of the helical rotor that constitutes compressor main body is controlled, via discharging stream pressurized gas supplied to the supply target from the exhaust port of above-mentioned compressor main body, it is characterized in that, detect near the pressure of the pressurized gas the above-mentioned exhaust port of above-mentioned discharge stream and as the 1st pressure; Detect on the above-mentioned discharge stream than the pressure of the locational pressurized gas of the more close above-mentioned supply target in detection position of above-mentioned the 1st pressure and as the 2nd pressure; In above-mentioned the 1st pressure is no more than the scope of above-mentioned the 1st setting pressure, make above-mentioned the 2nd pressure and above-mentioned the 2nd setting pressure as one man control the rotating speed of above-mentioned drive motor.
6. the method for operation of screw compressor as claimed in claim 5 is characterized in that, obtains the 1st rotating speed of above-mentioned drive motor based on above-mentioned the 1st pressure and above-mentioned the 1st setting pressure; Obtain the 2nd rotating speed of above-mentioned drive motor based on above-mentioned the 2nd pressure and above-mentioned the 2nd setting pressure, control the rotating speed of above-mentioned drive motor with the rotating speed of the low side in above-mentioned the 1st rotating speed and above-mentioned the 2nd rotating speed.
7. the method for operation of screw compressor as claimed in claim 6 is characterized in that, making above-mentioned the 1st setting pressure is the rated pressure of above-mentioned compressor main body, makes above-mentioned the 2nd setting pressure for supplying with the desired pressure arbitrarily of target.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55367/03 | 2003-03-03 | ||
| JP55367/2003 | 2003-03-03 | ||
| JP2003055367A JP4336122B2 (en) | 2003-03-03 | 2003-03-03 | Screw compressor and operation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1526953A CN1526953A (en) | 2004-09-08 |
| CN100549423C true CN100549423C (en) | 2009-10-14 |
Family
ID=33119396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100079005A Expired - Lifetime CN100549423C (en) | 2003-03-03 | 2004-03-03 | Screw compressor and method of operation thereof |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4336122B2 (en) |
| CN (1) | CN100549423C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4482416B2 (en) * | 2004-09-30 | 2010-06-16 | 株式会社神戸製鋼所 | Compressor |
| JP2008297945A (en) * | 2007-05-30 | 2008-12-11 | Kobe Steel Ltd | Method for operating oil cooled compressor |
| JP5091787B2 (en) * | 2008-07-15 | 2012-12-05 | 株式会社日立産機システム | Compressed air production facility |
| JP2012127253A (en) * | 2010-12-15 | 2012-07-05 | Kobe Steel Ltd | Screw compressor |
| TWI400415B (en) * | 2010-12-17 | 2013-07-01 | Ind Tech Res Inst | Controlling method of changeable capacity and changeable discharge pressure of a variable speed screw compressor |
| JP5358608B2 (en) * | 2011-03-30 | 2013-12-04 | 日立アプライアンス株式会社 | Screw compressor and chiller unit using the same |
| JP6404169B2 (en) * | 2015-04-02 | 2018-10-10 | 株式会社神戸製鋼所 | Compressor unit and gas supply device |
| JP6922113B1 (en) * | 2021-05-27 | 2021-08-18 | 株式会社神戸製鋼所 | Compressor unit, compressor unit control program and control method |
-
2003
- 2003-03-03 JP JP2003055367A patent/JP4336122B2/en not_active Expired - Lifetime
-
2004
- 2004-03-03 CN CNB2004100079005A patent/CN100549423C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP4336122B2 (en) | 2009-09-30 |
| JP2004263631A (en) | 2004-09-24 |
| CN1526953A (en) | 2004-09-08 |
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