CN208431206U - The air inlet blade opening of centrifugal compressor accurately controls and feedback device - Google Patents
The air inlet blade opening of centrifugal compressor accurately controls and feedback device Download PDFInfo
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- CN208431206U CN208431206U CN201820864345.5U CN201820864345U CN208431206U CN 208431206 U CN208431206 U CN 208431206U CN 201820864345 U CN201820864345 U CN 201820864345U CN 208431206 U CN208431206 U CN 208431206U
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Abstract
A kind of air inlet blade opening of centrifugal compressor accurately controls and feedback device, including mobile detection block and displacement sensor；Air inlet regulating device includes inlet cylinder, and blade and rotating is connected on the side wall of inlet cylinder；Further include piston cylinder, set on the peripheral part of inlet cylinder, is slidably matched in the axial direction by hydraulic-driven with inlet cylinder；The shaft and piston cylinder of blade are sequentially connected, and constitute when piston cylinder opposite inlet cylinder displacement in the axial direction, each blade rotates synchronously；Displacement sensor is fixed with respect to inlet cylinder, mobile detection block is fixedly arranged on piston cylinder, mobile detection block and the test side of displacement sensor are corresponding radially, constitute when mobile detection block is displaced in the axial direction with piston cylinder, and displacement sensor is capable of the axial position of the mobile detection block of real-time detection.The utility model smart structural design, in the accurate control for realizing blade opening on the hydraulic driving mode of low cost on the basis of change as small as possible, practical function is significant and does not dramatically increase cost.
Description
Technical field
The utility model relates to centrifugal compressors, and in particular to the air inlet blade opening of centrifugal compressor accurately controls
And feedback device.
Background technique
In general, the structure composition of centrifugal refigerating compressor includes that motor, impeller, diffuser and air inlet regulating device are several
A part.Wherein, air inlet regulating device (IGV) is located at the axial admission side of impeller, and the aperture by adjusting blade adjusts impeller
Air inflow (" gas " described in this case indicate working medium).Wheel rotation is assemblied in diffuser, the output shaft and impeller of motor
Coaxial transmission connection, in centrifugal compressor work, carry out high speed rotation is driven by motor in impeller, by high speed rotation to by axis
It does work to the working medium for entering the impeller, improves the pressure of working medium, then radially flowing out to the exhaust channel of diffuser by impeller,
And compressor is discharged via exhaust pipe.
The refrigeration effect of centrifugal compressor send the air inflow to impeller directly proportional to via air inlet regulating device, and air inflow is got over
Big refrigeration effect is better.Therefore it can meet different refrigeration requirements by adjusting air inflow.In the prior art, air inflow
Adjusting is realized by being adjusted in synchronism the aperture of several blades in air inlet regulating device, the control machine including two kinds of mainstreams
Structure, one is by gear drive adjust, and by stepper motor realization blade opening accurate control, another kind is to pass through liquid
Pressure driving is adjusted.
Above-mentioned the shortcomings of the prior art is: although one, gear drive adjusting may be implemented accurately to adjust, mechanism phase
To complexity, and cost is very high, and usual component price is about 15000 yuan or so；Two, hydraulic-driven adjusting opposed configuration is simple, and
Cost is relatively low, only include casting material and processing charges, usual component price less than 4000 yuan, but the disadvantage is that can only fuzzy control,
When cooling capacity carries out increment of load or off-load to compressor to user according to demand, can only stop moving close near demand cooling capacity
Make, its specific aperture can not be grasped, that is, be unable to reach accurate demand cooling capacity.
Therefore, above-mentioned the shortcomings of the prior art how is solved, is become as the class to be researched and solved of the utility model
Topic.
Summary of the invention
The purpose of this utility model is to provide a kind of air inlet blade openings of centrifugal compressor accurately to control and feed back
Device.
In order to achieve the above objectives, the technical solution adopted in the utility model is:
A kind of air inlet blade opening of centrifugal compressor accurately controls and feedback device, set on an air inlet tune of compressor
In regulating device, including mobile detection block and displacement sensor；
The air inlet regulating device includes the inlet cylinder of an open at both ends, which has an inner cavity, inner cavity connection
The opening at both ends constitutes an air inlet runner；One end of inner cavity is inlet end, and the other end is outlet side, the corresponding compression in the outlet side
The impeller of machine is arranged；In being equipped with multiple blades at the outlet side in the inner cavity, each blade is flat in same radial direction
It is evenly arranged on face, and rotates and be connected on the side wall of inlet cylinder；
The air inlet regulating device further includes a piston cylinder, which is sheathed on the peripheral part of the inlet cylinder, passes through
Hydraulic-driven is slidably matched in the axial direction with inlet cylinder；The shaft of each blade is stretched out outside the side wall of the inlet cylinder, and
The shaft of each blade is sequentially connected with the piston cylinder, constitutes when the inlet cylinder is displaced piston cylinder relatively in the axial direction,
Each blade rotates synchronously；
Wherein, the relatively described inlet cylinder of institute's displacement sensors is fixed, and the mobile detection block is fixedly arranged on the piston cylinder
On, and the mobile detection block and a test side of institute displacement sensors are corresponding radially, constitute when mobile detection block
When being displaced in the axial direction with the piston cylinder, institute's displacement sensors are capable of the axial position of mobile detection block described in real-time detection
It sets.
Related content in above-mentioned technical proposal is explained as follows:
1. in above scheme, the displacement signal that institute's displacement sensors can will test is converted into electric signal and exports to upper
In machine, the displacement data of mobile detection block in real time, is accurately grasped so as to user, which is the displacement number of piston cylinder
According to since each blade is sequentially connected with piston cylinder, user can grasp whereby the rotation data of blade, to judge and control
The aperture of blade processed.
2. in above scheme, the mobile detection block is a wedge block, which has an inclined-plane, and the inclined-plane is along axial
Inclination, and it is corresponding with the test side of institute displacement sensors；Institute's displacement sensors are mechanical pick-up device, and the test side is inspection
Probing needle, the needle contact of the detection probe and against the inclined-plane of the wedge block.When piston cylinder is in axial displacement, detection is visited
Needle by by the inclined-plane of wedge block against, and then radially be subjected to displacement, opening for blade can be grasped by the displacement in real time
Degree.
3. in above scheme, institute's displacement sensors are laser/infrared sensor, the test side is a light path,
The light path is radially irradiated the mobile detection block, and then grasps the displacement data of mobile detection block, the inspection
Survey technology will appreciate that by those skilled in the art, therefore not repeat.
4. in above scheme, the peripheral part of the inlet cylinder is installed with a connecting seat, the boundary of the attachment base and inlet cylinder
It is shaped as an annular assembly cavity, the piston cylinder is slideably positioned in the axial direction in the annular assembly cavity；
The upper section and lower section of the attachment base inner wall, which are sealed with the lateral wall of the piston cylinder, to be cooperated, attachment base inner wall
A hydraulic cavities are formed between middle section and the lateral wall of piston cylinder, the outer wall of the piston cylinder, which is radially outer, is convexly equipped with a liquid
Service portion is pressed, which protrudes into the hydraulic cavities, and hydraulic cavities is divided into the chamber of two sealings in the axial direction, and two
The chamber is provided with an oil filler point and an oil leak hole respectively.
5. in above scheme, the default initial position of the air inlet regulating device is the fully closed state of blade, i.e., hydraulic work
It is adjacent to one end of hydraulic cavities in the axial direction with portion.Hydraulic cavities are divided into A chamber and B chamber by the hydraulic action portion of piston cylinder.
Such as: when compressor needs increment of load, four-way valve is connected, high pressure oil enters from the oil filler point of A chamber, B chamber
Hydraulic oil is discharged from the oil leak hole of B chamber, and piston cylinder is mobile to air inlet extreme direction at this time, and mobile detection block follows piston cylinder together
Mobile to air inlet extreme direction, displacement sensor detects the change in location of mobile detection block, converts electric signal for displacement signal
Output, read at this time voltage (electric current) value to determine the aperture of blade；
When compressor needs off-load, four-way valve is connected, high pressure oil enters from the oil filler point of B chamber, the hydraulic oil of A chamber
It is discharged from the oil leak hole of A chamber, piston cylinder is mobile to outlet extreme direction (i.e. impeller direction) at this time, and mobile detection block follows piston
The outlet side direction in the same direction of cylinder one is mobile, and displacement sensor detects the change in location of mobile detection block, converts displacement signal to
Electric signal output, read at this time voltage (electric current) value to determine the aperture of blade.
6. in above scheme, the mobile detection block is corresponded on the inlet cylinder equipped with a limiting slot, the mobile detection
Block, which slides axially, to be set in the limiting slot, the equivalent width of the two, and then realizes the positioning of piston cylinder in the circumferential, is avoided
Circumferential rotation occurs for piston cylinder.
The working principle and advantage of the utility model are as follows:
A kind of air inlet blade opening of centrifugal compressor of the utility model accurately controls and feedback device, including mobile inspection
Survey block and displacement sensor；Air inlet regulating device includes inlet cylinder, and blade and rotating is connected on the side wall of inlet cylinder；Further include
Piston cylinder is slidably matched by hydraulic-driven with inlet cylinder in the axial direction set on the peripheral part of inlet cylinder；The shaft and work of blade
Plug tube transmission connection is constituted when piston cylinder opposite inlet cylinder displacement in the axial direction, and each blade rotates synchronously；Displacement sensor
Opposite inlet cylinder is fixed, and mobile detection block is fixedly arranged on piston cylinder, and the test side of mobile detection block and displacement sensor is in radial direction
Upper correspondence is constituted when mobile detection block is displaced in the axial direction with piston cylinder, and displacement sensor being capable of the mobile detection of real-time detection
The axial position of block.
Compared to existing technologies, the utility model smart structural design, on the basis of change as small as possible in it is low at
The accurate control of blade opening is realized on this hydraulic driving mode, practical function is significant and does not dramatically increase cost.
Detailed description of the invention
Attached drawing 1 is the top view of the utility model embodiment；
Attached drawing 2 be in Fig. 1 A-A to diagrammatic cross-section；
Attached drawing 3 is the enlarged drawing in Fig. 2 at B；
Attached drawing 4 is the enlarged drawing in Fig. 2 at C.
In the figures above: 1. mobile detection blocks；2. displacement sensor；3. inlet cylinder；4. inner cavity；5. inlet end；6. outlet
End；7. impeller；8. blade；9. piston cylinder；10. attachment base；11. test side；12. inclined-plane；13. attachment base；14. annular assembly
Chamber；15. hydraulic cavities；16. hydraulic action portion；17. chamber；17a.A chamber；17b.B chamber；18. impulse pipeline；19. pressure passes
Sensor；20. diffuser；21. air inlet side；22. going out gas side；23. exhaust channel；24. exhaust pipe；25. sealing element；26. first end；
27. second end.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and embodiments:
Embodiment: referring to shown in attached drawing 1,2, a kind of air inlet blade opening of centrifugal compressor accurately controls and feeds back dress
It sets, i.e., air inlet precise control device hereinafter, the centrifugal compressor further includes leakproofness monitoring device.
Wherein, as shown in figure 3, the air inlet precise control device is set in an air inlet regulating device of compressor, including
Mobile detection block 1 and displacement sensor 2.
The air inlet regulating device includes the inlet cylinder 3 of an open at both ends, which has an inner cavity 4, axial to cut
Face is rectangle or inverted trapezoidal, which is connected to the opening at both ends, constitutes an air inlet runner；One end of inner cavity is inlet end 5, separately
One end is outlet side 6, and the impeller 7 of the corresponding compressor in the outlet side 6 is arranged；It is set in the inner cavity 4 at the outlet side 6
There are multiple blades 8, each blade 8 is evenly arranged on same sagittal plane, and is rotated and be connected on the side wall of inlet cylinder 3；
The air inflow of impeller 7 is adjusted by the rotation of blade 8；When whole blades 8 are perpendicular to be arranged in air inlet runner, air inlet runner quilt
It closes, the air inflow of impeller 7 is minimum at this time；When whole blades 8 are in air inlet runner setting is parallel to, air inlet runner is opened,
The air inflow of impeller 7 is maximum at this time.
The air inlet regulating device further includes a piston cylinder 9, which is sheathed on the peripheral part of the inlet cylinder 3, is led to
Hydraulic-driven is crossed to be slidably matched in the axial direction with inlet cylinder 3；The shaft of each blade 8 is stretched out outside the side wall of the inlet cylinder 3
Portion, and the shaft of each blade 8 is sequentially connected with the inner sidewall of the piston cylinder 9, constitutes when piston cylinder 9 is in the axial direction with respect to institute
When stating the displacement of inlet cylinder 3, each blade 8 is rotated synchronously, and the mode being specifically sequentially connected is those skilled in the art institute energy
It is enough to grasp, therefore do not repeat.
Wherein, a connecting seat 10 on the relatively described inlet cylinder 3 of institute's displacement sensors 2 is fixed, the mobile detection block 1
It is fixedly arranged on the piston cylinder 9, and a test side 11 of the mobile detection block 1 and institute's displacement sensors 2 is radially
It is corresponding, it constitutes when mobile detection block 1 is displaced in the axial direction with the piston cylinder 9, institute's displacement sensors 2 being capable of real-time detection
The axial position of the mobile detection block 1, and the displacement signal that will test is converted into electric signal and exports into host computer, so as to
User in real time, accurately grasps the displacement data of mobile detection block 1, which is the displacement data of piston cylinder 9, due to
Each blade 8 is sequentially connected with piston cylinder 9, therefore user can grasp whereby the rotation data of blade 8, to judge and control leaf
The aperture of piece 8.
The mobile detection block 1 is a wedge block, which has an inclined-plane 12, and the inclined-plane 12 is axially inclined, and
It is corresponding with the test side 11 of institute displacement sensors 2；Institute's displacement sensors 2 are mechanical pick-up device, and the test side 11 is inspection
Probing needle, the needle contact of the detection probe and against the inclined-plane of the wedge block 12.When piston cylinder 9 is in axial displacement, inspection
Probing needle by by the inclined-plane 12 of wedge block against, and then radially be subjected to displacement, leaf can be grasped by the displacement in real time
The aperture of piece 8.
The mobile detection block 1 is corresponded on the inlet cylinder 3 equipped with a limiting slot (not drawing in figure), the mobile detection
Block 1, which slides axially, to be set in the limiting slot, the equivalent width of the two, and then realizes the positioning of piston cylinder 9 in the circumferential, is kept away
Exempt from piston cylinder 9 and circumferential rotation occurs.
The peripheral part of the inlet cylinder 3 is installed with the attachment base 10, defines to be formed between the attachment base 10 and inlet cylinder 3
One annular assembly cavity 14, the piston cylinder 9 are slideably positioned in the axial direction in the annular assembly cavity 14.
The upper section and lower section of 10 inner wall of attachment base, which are sealed with the lateral wall of the piston cylinder 9, to be cooperated, attachment base 10
A hydraulic cavities 15 are formed between the middle section of inner wall and the lateral wall of piston cylinder 9, the axial stroke of the piston cylinder 9 is hydraulic by this
The axial length of chamber 15 is limited.The outer wall of the piston cylinder 9, which is radially outer, is convexly equipped with a hydraulic action portion 16, the liquid
Pressure service portion 16 protrudes into the hydraulic cavities 15, and hydraulic cavities 15 is divided into the chamber 17 of two sealings in the axial direction, and described in two
Chamber 17 is provided with an oil filler point and an oil leak hole (not drawing in figure) respectively.
The default initial position of the air inlet regulating device is the fully closed state of blade 8, i.e., hydraulic action portion 16 is in axial direction
On be adjacent to one end of hydraulic cavities 15.The hydraulic action portion 16 of piston cylinder 9 divides hydraulic cavities 15 for A chamber 17a and B chamber 17b.
Such as: when compressor needs increment of load, four-way valve is connected, high pressure oil enters from the oil filler point of A chamber 17a, B chamber
The hydraulic oil of 17b is discharged from the oil leak hole of B chamber 17b, and piston cylinder 9 is mobile to 5 direction of inlet end at this time, mobile detection block 1 with
Mobile with 5 direction of inlet end in the same direction of piston cylinder 9 one, displacement sensor 2 detects the change in location of mobile detection block 1, will be displaced
Signal is converted into electric signal output, read at this time voltage (electric current) value to determine the aperture of blade 8；
When compressor needs off-load, four-way valve is connected, high pressure oil enters from the oil filler point of B chamber 17b, A chamber 17a's
Hydraulic oil is discharged from the oil leak hole of A chamber 17a, and piston cylinder 9 is mobile to 6 direction of outlet side (i.e. 7 direction of impeller) at this time, mobile inspection
Surveying block 1 follows 6 direction of outlet side in the same direction of piston cylinder 9 one mobile, and displacement sensor 2 detects the change in location of mobile detection block 1,
Convert electric signal output for displacement signal, read at this time voltage (electric current) value to determine the aperture of blade 8.
Wherein, as shown in figure 4, the leakproofness monitoring device corresponds to the air inlet regulating device and the impeller 7
It is fitted to each other place's setting, including impulse pipeline 18 and pressure sensor 19.
For 7 rolling assembling of impeller in a diffuser 20 of compressor, the diffuser 20 is described in being assemblied in axial direction
Air inlet regulating device outlet side 6；The outlet side 6 of the corresponding inlet cylinder 3 of the air inlet side 21 of the impeller 7 is arranged, for it is axial into
Gas；The circumference setting for going out the corresponding diffuser 20 in gas side 22 of impeller 7, for radial outlet；Height is driven by motor in the impeller 7
Speed rotation, while improve the pressure of working medium, then by leaf to by the working medium acting axially into the impeller 7 by high speed rotation
Wheel 7 is radially flowed out to the exhaust channel 23 of diffuser 20, and compressor is discharged via exhaust pipe 24.The air inlet of the impeller 7
Dynamic sealing is formed by a sealing element 25 between side 21 and the outlet side of the inlet cylinder 36.
Wherein, the impulse pipeline 18 is opened in the air inlet regulating device；The first end 26 of the impulse pipeline 18
It is connected at the setting of the sealing element 25, the second end 27 of impulse pipeline 18 is connected with the pressure sensor 19, which passes
For sensor 19 for the atmospheric pressure value in real-time monitoring impulse pipeline 18, which is the air pressure at 25 setting of sealing element
Value, that is, the atmospheric pressure value of 7 air inlet side 21 of the impeller.
The first end 26 of the impulse pipeline 18 is used as pressure acquisition point, when the leakproofness of the sealing element 25 is deteriorated,
The atmospheric pressure value of 7 air inlet side 21 of impeller will change, and impulse pipeline 18 is with air-flow at 25 setting of sealing element due to communicating at this time,
The variation of air pressure will detect via the pressure sensor 19 of 18 other end of impulse pipeline and be sent to host computer in real time, to user
It is reminded.
Wherein, the first end 26 of the impulse pipeline 18 is opened in 6 inside of outlet side of the air inlet regulating device.Work as pressure
When contracting machine operates normally, the first end 26 of impulse pipeline 18 acquires the pressure of 6 air inlet side 21 of impeller, and numerical value is basicly stable and to be
System minimum pressure；When the leakproofness of impeller 7 sealing element 25 is deteriorated, high-pressure working medium occur leakage do not stop to impeller 7 into
Gas side 21, due to impulse pipeline 18 first end 26 and 19 airflow connection of pressure sensor, because this latter will to pressure change into
Row acquisition shows as collected pressure and starts to fluctuate or increase；It designs whereby, it can be determined that the sealing of 7 sealing element 25 of impeller
Whether property is normal.
Compared to existing technologies, the utility model smart structural design, on the basis of change as small as possible in it is low at
The accurate control of blade opening is realized on this hydraulic driving mode, practical function is significant and does not dramatically increase cost.
The above embodiments are only for explaining the technical ideas and features of the present invention, and its object is to allow be familiar with technique
Personage can understand the content of the utility model and implement accordingly, do not limit the protection scope of the present invention.
All equivalent change or modifications according to made by the spirit of the present invention essence, should all cover the protection scope of the utility model it
It is interior.
Claims (5)
1. a kind of air inlet blade opening of centrifugal compressor accurately controls and feedback device, it is characterised in that:
In an air inlet regulating device of compressor, including mobile detection block and displacement sensor；
The air inlet regulating device includes the inlet cylinder of an open at both ends, which has an inner cavity, which is connected to both ends
Opening, constitute an air inlet runner；One end of inner cavity is inlet end, and the other end is outlet side, which corresponds to compressor
Impeller setting；In being equipped with multiple blades at the outlet side in the inner cavity, each blade is on same sagittal plane
It is evenly arranged, and rotates and be connected on the side wall of inlet cylinder；
The air inlet regulating device further includes a piston cylinder, which is sheathed on the peripheral part of the inlet cylinder, by hydraulic
Driving is slidably matched in the axial direction with inlet cylinder；The shaft of each blade is stretched out outside the side wall of the inlet cylinder, and each leaf
The shaft of piece is sequentially connected with the piston cylinder, constitutes when the inlet cylinder is displaced piston cylinder relatively in the axial direction, each institute
Blade is stated to rotate synchronously；
Wherein, the relatively described inlet cylinder of institute's displacement sensors is fixed, and the mobile detection block is fixedly arranged on the piston cylinder, and
And the mobile detection block and a test side of institute displacement sensors are corresponding radially, constitute when mobile detection block is with described
When piston cylinder is displaced in the axial direction, institute's displacement sensors are capable of the axial position of mobile detection block described in real-time detection.
2. the apparatus according to claim 1, it is characterised in that: the mobile detection block is a wedge block, wedge block tool
There is an inclined-plane, the inclined-plane is axially inclined, and corresponding with the test side of institute displacement sensors；
Institute's displacement sensors are mechanical pick-up device, and the test side is detection probe, and the needle contact of the detection probe simultaneously supports
By the inclined-plane of the wedge block.
3. the apparatus according to claim 1, it is characterised in that: institute's displacement sensors are laser/infrared sensor, described
Test side is a light path, which is radially irradiated the mobile detection block.
4. the apparatus according to claim 1, it is characterised in that: the peripheral part of the inlet cylinder is installed with a connecting seat, should
It defines to form an annular assembly cavity between attachment base and inlet cylinder, the piston cylinder is slideably positioned in annular assembly in the axial direction
In chamber；
The upper section and lower section of the attachment base inner wall, which are sealed with the lateral wall of the piston cylinder, to be cooperated, the middle section of attachment base inner wall
A hydraulic cavities are formed between the lateral wall of piston cylinder, the outer wall of the piston cylinder, which is radially outer, is convexly equipped with a hydraulic work
With portion, which protrudes into the hydraulic cavities, and hydraulic cavities is divided into the chamber of two sealings in the axial direction, and described in two
Chamber is provided with an oil filler point and an oil leak hole respectively.
5. the apparatus of claim 2, it is characterised in that: correspond to the mobile detection block on the inlet cylinder equipped with one
Limiting slot, the mobile detection block, which slides axially, to be set in the limiting slot, the equivalent width of the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820864345.5U CN208431206U (en) | 2018-06-05 | 2018-06-05 | The air inlet blade opening of centrifugal compressor accurately controls and feedback device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820864345.5U CN208431206U (en) | 2018-06-05 | 2018-06-05 | The air inlet blade opening of centrifugal compressor accurately controls and feedback device |
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| Publication Number | Publication Date |
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| CN208431206U true CN208431206U (en) | 2019-01-25 |
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ID=65101454
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| CN201820864345.5U Active CN208431206U (en) | 2018-06-05 | 2018-06-05 | The air inlet blade opening of centrifugal compressor accurately controls and feedback device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464496A (en) * | 2021-08-18 | 2021-10-01 | 重庆江增船舶重工有限公司 | Detection structure of supercritical carbon dioxide centrifugal compressor |
| CN113465561A (en) * | 2021-07-01 | 2021-10-01 | 华能国际电力股份有限公司上安电厂 | Method for checking opening degree of movable blade adjustable axial flow fan |
-
2018
- 2018-06-05 CN CN201820864345.5U patent/CN208431206U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113465561A (en) * | 2021-07-01 | 2021-10-01 | 华能国际电力股份有限公司上安电厂 | Method for checking opening degree of movable blade adjustable axial flow fan |
| CN113464496A (en) * | 2021-08-18 | 2021-10-01 | 重庆江增船舶重工有限公司 | Detection structure of supercritical carbon dioxide centrifugal compressor |
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