CN117167293A - Gap-adjustable steam centrifugal compressor and gap control method thereof - Google Patents
Gap-adjustable steam centrifugal compressor and gap control method thereof Download PDFInfo
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- CN117167293A CN117167293A CN202311451364.7A CN202311451364A CN117167293A CN 117167293 A CN117167293 A CN 117167293A CN 202311451364 A CN202311451364 A CN 202311451364A CN 117167293 A CN117167293 A CN 117167293A
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Abstract
The application discloses an adjustable gap steam centrifugal compressor and a gap control method thereof, wherein the adjustable gap steam centrifugal compressor comprises an impeller, a volute, a steam inlet support, a control module and a steam inlet component consisting of a steam inlet section and an adjustable wheel cover, the steam inlet support is fixedly connected with the steam inlet section, and the adjustable wheel cover is movably connected with the steam inlet section; the impeller is positioned on the inner side of the adjustable wheel cover; an adjusting device is arranged on the steam inlet support, and the adjustable wheel cover is driven to move along the axial direction of the impeller by the adjusting device; one side of the impeller is provided with a displacement sensor for detecting the axial displacement variation of the impeller in a rotating state, and the steam inlet component is provided with a temperature sensor for detecting the steam inlet temperature. According to the application, the adjustable wheel cover is adjusted in real time through the adjusting device to compensate the change of the fit clearance caused by temperature change, so that the problems of collision and scratch between the impeller and the adjustable wheel cover and the problem of reduction of the working efficiency of the compressor caused by overlarge fit clearance are avoided.
Description
Technical Field
The application relates to the technical field of vapor compressors, in particular to an adjustable gap vapor centrifugal compressor and a gap control method thereof.
Background
As shown in fig. 5, the conventional vapor centrifugal compressor includes a housing 20 and an impeller 4, the impeller 4 being disposed in the housing 20, and a fit gap 21 being formed between the impeller and an inner wall of the housing. The size of the fit clearance is of great significance for the operation of the vapor centrifugal compressor. The smaller the fit gap 21 between the impeller 4 and the inner wall of the casing 20, the higher the efficiency of the compressor. However, too small a fit clearance easily results in collision or scratch between the impeller and the casing, affecting the operational safety of the vapor centrifugal compressor.
Since the temperature of the casing and the impeller changes during operation of the steam centrifugal compressor, the temperature changes, taking into account the expansion and contraction of the materials, which may cause a change in the actual dimensions of the casing and the impeller, which in turn may result in a change in the fit gap 21 between the impeller 4 and the inner wall of the casing 20. In order to avoid collision and scratch risks between the impeller and the shell caused by the change of the fit clearance due to temperature, the existing steam centrifugal compressor can increase the factory fit clearance between the impeller and the inner wall of the shell, so that the fit clearance between the impeller and the shell is left with sufficient safety margin; thus, although the safe operation of the steam centrifugal compressor is ensured, the compression efficiency of the steam centrifugal compressor is sacrificed, so that the steam centrifugal compressor cannot operate efficiently.
Disclosure of Invention
The application aims to solve the defects in the prior art and provides an adjustable gap steam centrifugal compressor and a gap control method thereof.
The application aims at realizing the following technical scheme: the steam centrifugal compressor with adjustable gap comprises an impeller, a volute, a steam inlet support, a control module and a steam inlet component consisting of a steam inlet section and an adjustable wheel cover, wherein the steam inlet support is fixedly connected with the steam inlet section, and the adjustable wheel cover is movably connected with the steam inlet section; the impeller is positioned on the inner side of the adjustable wheel cover; an adjusting device is arranged on the steam inlet support, and the adjustable wheel cover is driven to move along the axial direction of the impeller by the adjusting device;
one side of the impeller is provided with a displacement sensor for detecting the axial displacement variation of the impeller in a rotating state, and the steam inlet component is provided with a temperature sensor for detecting the steam inlet temperature; the temperature sensor and the displacement sensor are electrically connected with the control module;
the control module calculates an actual operation target clearance value through the air inlet temperature and the impeller axial displacement variation, and the adjusting device drives the adjustable wheel cover to move under the control of the control module so that the fit clearance between the adjustable wheel cover and the impeller is consistent with the actual operation target clearance value.
Preferably, the end face, facing the adjustable wheel cover, of the steam inlet section is provided with a first protruding connecting structure, the end face, facing the steam inlet section, of the adjustable wheel cover is provided with a second protruding connecting structure, and the first protruding connecting structure and the second protruding connecting structure are connected in a staggered mode.
Preferably, the volute is provided with a back plate, the displacement sensor is arranged on the back plate, and the displacement sensor is opposite to one side surface of the impeller.
Preferably, the steam inlet support is annular, the adjustable wheel cover is arranged on the inner side of the steam inlet support, the outer side of the adjustable wheel cover is provided with a matching annular surface, and the matching annular surface is in contact with the inner side surface of the steam inlet support.
Preferably, the adjusting device comprises a motor, a connecting rod and a rotating shaft which is uniformly arranged on the steam inlet support, the steam inlet support is provided with a shaft hole corresponding to the rotating shaft, and the rotating shaft penetrates through the shaft hole; an eccentric shaft is arranged at one end of the rotating shaft, which is close to the adjustable wheel cover, the adjustable wheel cover is provided with a connecting hole corresponding to the eccentric shaft, and the eccentric shaft is connected in the connecting hole;
each rotating shaft is connected with a transmission piece, two connecting ends are arranged on the transmission pieces, and a connecting rod is connected between the connecting ends of two adjacent transmission pieces; the connecting rod is in running fit with the connecting end on the transmission piece; one of the rotating shafts is connected with a motor, and the motor is electrically connected with the control module.
Preferably, the connecting hole is a waist hole.
Preferably, the motor is a servo motor.
A clearance control method of an adjustable clearance vapor centrifugal compressor comprises the following steps:
when the steam centrifugal compressor operates, the axial displacement variation of the impeller is detected in real time through the displacement sensor, the steam inlet temperature is detected in real time through the temperature sensor, and the control module calculates the actual operation target clearance value in real time through the axial displacement variation of the impeller and the steam inlet temperature;
after the actual operation target clearance value is calculated, the control module converts the actual operation target clearance value to obtain a target angle position of the motor and controls the motor to rotate; the motor drives a rotating shaft connected with the motor to rotate in the rotating process, and the other rotating shafts are driven to synchronously rotate through the transmission piece and the connecting rod when the rotating shaft rotates; the rotating shaft drives the eccentric shaft to rotate when rotating, and the eccentric shaft drives the adjustable wheel cover to move along the axial direction of the impeller until the fit clearance between the adjustable wheel cover and the impeller is consistent with the actual running target clearance value.
Preferably, the actual operation target gap value is calculated by the following formula:
；
；
wherein,for the actual operating target gap value,/>For the axial displacement variation of the impeller->For the intake temperature variation value,/-)>For detecting the inlet temperature of the steam centrifugal compressor at a time point, < > in->Is the inlet steam temperature of the steam centrifugal compressor in the rated working state, +.>For the thermal expansion coefficient of the admission part, +.>For the distance from the steam inlet section to the outlet end face of the impeller, < > is provided>Is the fit clearance value of the steam centrifugal compressor in the rated working state.
The beneficial effects of the application are as follows: according to the application, the temperature sensor and the displacement sensor can be used for detecting the air inlet temperature and the axial displacement variation of the impeller in real time and calculating the actual running target clearance value, and the adjustable wheel cover is regulated in real time by the regulating device to compensate the change of the fit clearance caused by the temperature variation, so that the fit clearance is always kept within a reasonable range, the problems of collision and scratch between the impeller and the adjustable wheel cover and the reduction of the working efficiency of the compressor caused by overlarge fit clearance are avoided.
Drawings
Fig. 1 is a schematic structural view of the present application.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is an enlarged view of a portion B in fig. 1.
Fig. 4 is a schematic structural view of the adjusting device.
Fig. 5 is a schematic view of a conventional vapor centrifugal compressor.
In the figure: 1. the device comprises a volute, 2, a back plate, 3, a displacement sensor, 4, an impeller, 5, a steam inlet section, 6, an adjustable wheel cover, 7, a steam inlet support, 8, a transmission part, 9, an eccentric shaft, 10, a motor, 11, a temperature sensor, 12, a rotating shaft, 13, a first protruding connecting structure, 14, a second protruding connecting structure, 17, a connecting rod, 18, a connecting hole, 20, a shell, 21 and a fit clearance.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application.
It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present application.
It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.
As shown in fig. 1 to 4, the adjustable gap steam centrifugal compressor comprises an impeller 4, a volute 1, a steam inlet support 7, a control module and a steam inlet component consisting of a steam inlet section 5 and an adjustable wheel cover 6. The steam inlet support 7 is fixedly connected with the steam inlet section 5, and the steam inlet support and the steam inlet section 5 are connected through bolts. The impeller 4 is positioned on the inner side of the adjustable wheel cover 6, and a fit clearance is formed between the impeller 4 and the inner wall of the adjustable wheel cover 6.
The steam inlet support 7 is annular, the adjustable wheel cover 6 is arranged on the inner side of the steam inlet support 7, the outer side of the adjustable wheel cover 6 is provided with a matching annular surface, and the matching annular surface is in contact with the inner side surface of the steam inlet support 7. The adjustable wheel cover 6 can move along the axis of the steam inlet support 7, and the steam inlet support 7 plays a role in guiding the movement of the adjustable wheel cover 6.
The volute 1 is fixedly connected with the steam inlet support 7, and the volute 1 and the steam inlet support 7 are connected through bolts. The volute 1 and the steam inlet section 5 are respectively connected to two ends of the steam inlet support 7. The volute 1 is provided with an inner annular surface, the outer side of the adjustable wheel cover 6 is provided with a contact annular surface which is contacted with the inner annular surface of the volute 1, and the contact annular surface is in contact fit with the inner annular surface; when the adjustable wheel cover 6 moves, the adjustable wheel cover 6 and the volute 1 are always in contact fit with the inner annular surface through the contact annular surface.
The adjustable wheel cover 6 is movably connected with the steam inlet section 5; the steam inlet support 7 is provided with an adjusting device which is connected with the adjustable wheel cover 6, and the adjustable wheel cover 6 is driven to move along the axial direction of the impeller 4 by the adjusting device.
Wherein, be equipped with first protruding connection structure 13 on the terminal surface towards adjustable wheel cap 6 on the admission section 5, be equipped with second protruding connection structure 14 on the terminal surface towards admission section 5 on the adjustable wheel cap 6, first protruding connection structure 13 and second protruding connection structure 14 all are the ring-type, and first protruding connection structure 13 sets up along the terminal surface of admission section 5, and second protruding connection structure 14 sets up along the terminal surface of adjustable wheel cap 6. The first bump connecting structures 13 and the second bump connecting structures 14 are connected in a staggered manner, and a gap of 0-0.1 mm is arranged between the adjacent first bump connecting structures 13 and the adjacent second bump connecting structures 14. The steam inlet section 5 and the adjustable wheel cover 6 are connected through a first protruding connecting structure 13 and a second protruding connecting structure 14, and the adjustable wheel cover 6 can move relative to the steam inlet section 5 in a connecting mode.
In this embodiment, the intake section and the adjustable shroud 6 constituting the intake part are made of the same material, and therefore the thermal expansion coefficients of the intake section and the adjustable shroud 6 are the same.
The adjusting device comprises a motor 10, a connecting rod 17 and a rotating shaft 12 which is uniformly arranged on the steam inlet support 7. In this embodiment, 8-16 rotating shafts 12 are arranged on the steam inlet support 7, and the rotating shafts 12 are arranged on the steam inlet support 7 in a circular array. The steam inlet support 7 is provided with a shaft hole corresponding to the rotating shaft 12, the rotating shaft 12 passes through the shaft hole, and the rotating shaft 12 can rotate in the shaft hole. The rotary shaft 12 is arranged along the radial direction of the steam inlet support 7. The rotating shaft 12 is provided with an eccentric shaft 9 near one end of the adjustable wheel cover 6, the eccentric shaft 9 is eccentrically arranged relative to the rotating shaft 12, the adjustable wheel cover 6 is provided with a connecting hole 18 corresponding to the eccentric shaft 9, and the eccentric shaft 9 is connected in the connecting hole 18. Wherein the connection hole 18 is a waist hole. When the rotating shaft 12 rotates, the rotating movement of the rotating shaft 12 is converted into the axial movement of the adjustable wheel cover 6 under the action of the eccentric shaft 9.
Each rotating shaft 12 is connected with a transmission piece 8, the transmission piece 8 is fixedly connected with the rotating shaft 12, two connecting ends are arranged on the transmission piece 8, and the connecting position of the rotating shaft 12 and the transmission piece 8 is just positioned on the middle vertical line of the connecting line of the two connecting ends. The connecting rod 17 is connected between the connecting ends of the adjacent two transmission members 8, and the connecting rod 17 is in running fit with the connecting ends on the transmission members 8. One of the shafts 12 is connected to the motor 10, and the motor 10 is electrically connected to the control module. In this embodiment, the motor 10 is a servo motor.
One side of the impeller 4 is provided with a displacement sensor 3 for detecting the axial displacement variation of the impeller 4 in a rotating state of the impeller 4. The volute 1 is provided with a back plate 2, the displacement sensor 3 is arranged on the back plate 2, and the displacement sensor 3 is opposite to one side surface of the impeller 4. In this embodiment, the displacement sensor 3 is a non-contact displacement sensor 3, specifically an eddy current displacement sensor 3. In the rotation process of the impeller 4, the impeller 4 generates a certain amount of displacement change in the axial direction, and the distance between the end face of the impeller 4 and the displacement sensor 3 can be detected in real time through the displacement sensor 3, so that the movement change amount of the impeller 4 in the axial direction of the impeller 4, namely the axial displacement change amount of the impeller 4, can be known.
The steam inlet component is provided with a temperature sensor 11 for detecting the steam inlet temperature, and the temperature sensor 11 is embedded in the adjustable wheel cover 6. In the present embodiment, the temperature sensor 11 is a platinum-hot-resistance temperature sensor 11. The temperature sensor 11 and the displacement sensor 3 are both electrically connected with the control module.
The control module calculates an actual operation target clearance value through the air inlet temperature and the axial displacement change amount of the impeller 4, and the adjusting device drives the adjustable wheel cover 6 to move under the control of the control module so that the fit clearance between the adjustable wheel cover 6 and the impeller 4 is consistent with the actual operation target clearance value. Since the eccentric amount of the eccentric shaft 9 is known, the rotation angle of the rotating shaft 12 corresponds to the axial displacement of the adjustable wheel cover 6 one by one, and after the actual running target clearance value is obtained, the target angle position of the motor 10 can be obtained through conversion; when the motor 10 rotates to the target angle position, the fit clearance between the adjustable wheel cover 6 and the impeller 4 can reach the actual operation target clearance value.
The clearance control method of the clearance-adjustable steam centrifugal compressor comprises the following steps:
when the steam centrifugal compressor operates, the axial displacement variation of the impeller 4 is detected in real time through the displacement sensor 3, the steam inlet temperature is detected in real time through the temperature sensor 11, and the control module calculates the actual operation target clearance value in real time through the axial displacement variation of the impeller 4 and the steam inlet temperature;
after the actual operation target clearance value is calculated, the control module converts the actual operation target clearance value to obtain a target angle position of the motor 10 and controls the motor 10 to rotate; the motor 10 drives the rotating shaft 12 connected with the motor to rotate in the rotating process, and when the rotating shaft 12 rotates, the other rotating shafts 12 are driven to synchronously rotate through the transmission piece 8 and the connecting rod 17; the rotating shaft 12 drives the eccentric shaft 9 to rotate when rotating, and the eccentric shaft 9 drives the adjustable wheel cover 6 to move along the axial direction of the impeller 4 until the fit clearance between the adjustable wheel cover 6 and the impeller 4 is consistent with the actual running target clearance value.
Wherein, when calculating the actual operation target clearance value, the calculation is performed by the following formula:
；
；
in the method, in the process of the application,for the actual operating target gap value,/>For the axial displacement variation of the impeller->For the intake temperature variation value,/-)>To detect the time pointSteam inlet temperature of steam centrifugal compressor, +.>Is the inlet steam temperature of the steam centrifugal compressor in the rated working state, +.>For the thermal expansion coefficient of the admission part, +.>For the distance from the steam inlet section to the outlet end face of the impeller, < > is provided>Is the fit clearance value of the steam centrifugal compressor in the rated working state. In the formula, < >>、/>、/>Are all known parameters, and are measured by a temperature sensor>Is measured by a displacement sensor>In this way, the actual operating target clearance value +.>。
According to the application, the temperature sensor and the displacement sensor can be used for detecting the air inlet temperature and the axial displacement variation of the impeller in real time and calculating the actual running target clearance value, and the adjustable wheel cover is regulated in real time by the regulating device to compensate the change of the fit clearance caused by the temperature variation, so that the fit clearance is always kept within a reasonable range, the problems of collision and scratch between the impeller and the adjustable wheel cover and the reduction of the working efficiency of the compressor caused by overlarge fit clearance are avoided.
The present application is not limited to the above-mentioned preferred embodiments, and any person who can obtain other various products under the teaching of the present application can make any changes in shape or structure, and all the technical solutions that are the same or similar to the present application fall within the scope of the present application.
Claims (9)
1. The gap-adjustable steam centrifugal compressor is characterized by comprising an impeller (4), a volute (1), a steam inlet support (7), a control module and a steam inlet component consisting of a steam inlet section (5) and an adjustable wheel cover (6), wherein the steam inlet support (7) is fixedly connected with the steam inlet section (5), and the adjustable wheel cover (6) is movably connected with the steam inlet section (5); the impeller (4) is positioned at the inner side of the adjustable wheel cover (6); an adjusting device is arranged on the steam inlet support (7), and the adjustable wheel cover (6) is driven to move along the axial direction of the impeller (4) by the adjusting device;
one side of the impeller (4) is provided with a displacement sensor (3) for detecting the axial displacement variation of the impeller (4) in a rotating state of the impeller (4), and a temperature sensor (11) for detecting the temperature of the inlet steam is arranged on the inlet steam component; the temperature sensor (11) and the displacement sensor (3) are electrically connected with the control module;
the control module calculates an actual operation target clearance value through the air inlet temperature and the axial displacement variation of the impeller (4), and the adjusting device drives the adjustable wheel cover (6) to move under the control of the control module so that the fit clearance between the adjustable wheel cover (6) and the impeller (4) is consistent with the actual operation target clearance value.
2. The adjustable gap steam centrifugal compressor according to claim 1, wherein a first protruding connecting structure (13) is arranged on the end face, facing the adjustable wheel cover (6), of the steam inlet section (5), a second protruding connecting structure (14) is arranged on the end face, facing the steam inlet section (5), of the adjustable wheel cover (6), and the first protruding connecting structure (13) and the second protruding connecting structure (14) are connected in a staggered mode.
3. The adjustable gap steam centrifugal compressor according to claim 1, wherein a back plate (2) is arranged on the volute (1), a displacement sensor (3) is arranged on the back plate (2), and the displacement sensor (3) is opposite to one side surface of the impeller (4).
4. A gap-adjustable steam centrifugal compressor according to any one of claims 1-3, characterized in that the steam inlet support (7) is ring-shaped, the adjustable wheel cover (6) is arranged on the inner side of the steam inlet support (7), the outer side of the adjustable wheel cover (6) is provided with a matching ring surface, and the matching ring surface is in contact with the inner side surface of the steam inlet support (7).
5. The adjustable gap steam centrifugal compressor according to claim 4, wherein the adjusting device comprises a motor (10), a connecting rod (17) and rotating shafts (12) uniformly arranged on the steam inlet support (7), shaft holes corresponding to the rotating shafts (12) are formed in the steam inlet support (7), and the rotating shafts (12) penetrate through the shaft holes; an eccentric shaft (9) is arranged at one end of the rotating shaft (12) close to the adjustable wheel cover (6), a connecting hole (18) corresponding to the eccentric shaft (9) is arranged on the adjustable wheel cover (6), and the eccentric shaft (9) is connected in the connecting hole (18);
each rotating shaft (12) is connected with a transmission piece (8), two connecting ends are arranged on the transmission piece (8), and a connecting rod (17) is connected between the connecting ends of two adjacent transmission pieces (8); the connecting rod (17) is in rotary fit with the connecting end of the transmission piece (8); one of the rotating shafts (12) is connected with the motor (10), and the motor (10) is electrically connected with the control module.
6. The adjustable gap vapor centrifugal compressor of claim 5, wherein the connection hole (18) is a waist hole.
7. The adjustable gap vapor centrifugal compressor of claim 5, wherein the motor (10) is a servo motor.
8. A gap control method of an adjustable gap vapor centrifugal compressor according to claim 5, characterized by comprising the steps of:
when the steam centrifugal compressor operates, the axial displacement variation of the impeller (4) is detected in real time through the displacement sensor (3), the steam inlet temperature is detected in real time through the temperature sensor (11), and the control module calculates the actual operation target clearance value in real time through the axial displacement variation of the impeller (4) and the steam inlet temperature;
after the actual operation target clearance value is calculated, the control module converts the actual operation target clearance value to obtain a target angle position of the motor (10) and controls the motor (10) to rotate; the motor (10) drives a rotating shaft (12) connected with the motor to rotate in the rotating process, and when the rotating shaft (12) rotates, the other rotating shafts (12) are driven to synchronously rotate through the transmission part (8) and the connecting rod (17); the rotating shaft (12) drives the eccentric shaft (9) to rotate when rotating, and the eccentric shaft (9) drives the adjustable wheel cover (6) to move along the axial direction of the impeller (4) until the fit clearance between the adjustable wheel cover (6) and the impeller (4) is consistent with the actual running target clearance value.
9. The clearance control method of an adjustable clearance vapor centrifugal compressor of claim 8, wherein the actual operating target clearance value is calculated by the following formula:
；
；
wherein,for the actual operating target gap value,/>For the axial displacement variation of the impeller->In order to change the temperature of the inlet air,for detecting the inlet temperature of the steam centrifugal compressor at a time point, < > in->Is the inlet steam temperature of the steam centrifugal compressor in the rated working state, +.>For the thermal expansion coefficient of the admission part, +.>For the distance from the steam inlet section to the outlet end face of the impeller, < > is provided>Is the fit clearance value of the steam centrifugal compressor in the rated working state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311451364.7A CN117167293B (en) | 2023-11-03 | 2023-11-03 | Gap-adjustable steam centrifugal compressor and gap control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311451364.7A CN117167293B (en) | 2023-11-03 | 2023-11-03 | Gap-adjustable steam centrifugal compressor and gap control method thereof |
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| CN117167293B CN117167293B (en) | 2024-02-02 |
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Citations (6)
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| JPH11257293A (en) * | 1998-03-11 | 1999-09-21 | Kobe Steel Ltd | Control device of centrifugal compressor |
| CN204591749U (en) * | 2015-05-04 | 2015-08-26 | 亿昇(天津)科技有限公司 | A kind of temperature compensation structure adjusting centrifugal blower impeller and spiral case gap |
| CN206555014U (en) * | 2017-02-13 | 2017-10-13 | 宁波神通模塑有限公司 | A kind of adjustable automobile turbo charging installation |
| US20200256214A1 (en) * | 2017-10-23 | 2020-08-13 | Mitsubishi Hitachi Power Systems, Ltd. | Axial-flow fluid machine and tip clearance measuring method therefor |
| CN211422997U (en) * | 2019-11-21 | 2020-09-04 | 泛仕达机电股份有限公司 | Sealing structure for reducing gap leakage of inlet collector of centrifugal fan |
| CN113446238A (en) * | 2020-03-27 | 2021-09-28 | Lg电子株式会社 | Method and apparatus for a compressor |
-
2023
- 2023-11-03 CN CN202311451364.7A patent/CN117167293B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11257293A (en) * | 1998-03-11 | 1999-09-21 | Kobe Steel Ltd | Control device of centrifugal compressor |
| CN204591749U (en) * | 2015-05-04 | 2015-08-26 | 亿昇(天津)科技有限公司 | A kind of temperature compensation structure adjusting centrifugal blower impeller and spiral case gap |
| CN206555014U (en) * | 2017-02-13 | 2017-10-13 | 宁波神通模塑有限公司 | A kind of adjustable automobile turbo charging installation |
| US20200256214A1 (en) * | 2017-10-23 | 2020-08-13 | Mitsubishi Hitachi Power Systems, Ltd. | Axial-flow fluid machine and tip clearance measuring method therefor |
| CN211422997U (en) * | 2019-11-21 | 2020-09-04 | 泛仕达机电股份有限公司 | Sealing structure for reducing gap leakage of inlet collector of centrifugal fan |
| CN113446238A (en) * | 2020-03-27 | 2021-09-28 | Lg电子株式会社 | Method and apparatus for a compressor |
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