Measurement device for volute casing assembly and centrifugal compressor

Abstract

In the field of compressor technology, a measuring device for a volute casing assembly and a centrifugal compressor are provided. [Solution] The measurement device for a volute casing assembly includes a helical passage (1), a diffuser pipe (2), an outlet extension (3), and a tongue (4). The diffuser pipe is connected to the outlet of the helical passage, the outlet extension is connected to the outlet of the diffuser pipe, and the tongue is connected to the inlet of the helical passage. The tongue is used to convert the kinetic energy of the passing fluid, guide the flow, and reduce flow separation. Measurement points (100, 200, 300) are provided on the helical passage, the diffuser pipe, and the outlet extension, and these measurement points are used to detect and obtain fluid flow parameters and environmental parameters at predetermined locations. In this application, in actual measurements, the internal fluid performance of the volute casing assembly can be analyzed based on the entire machine operating conditions, including system measurements such as the entire throughflow area of ​​the entire machine, coupled adjustment of variable operating conditions, all operating condition measurements, and all flow field measurements. This can help further efficient optimization design and accurate performance prediction of the volute casing assembly.

Description

[Technical Field]

[0001] The present invention relates to the technical field of compressors, and more particularly to a measuring device for a volute casing assembly and a centrifugal compressor. [Background technology]

[0002] A centrifugal compressor is a core component of the multi-stage centrifugal compressor or axial-centrifugal compressor commonly used in compressed air energy storage systems. The volute casing is the central stationary component of the centrifugal compressor. Its spiral passage, with its gradually expanding cross-sectional design, collects the working fluid flowing out from the impeller or diffuser and directs it to the outlet passage. At the same time, it gradually converts the kinetic energy of the high-speed working fluid flowing in from upstream into pressure potential energy. Its deceleration and pressure boosting performance, as well as the degree of internal flow loss, have significant impacts on the overall efficiency, pressure ratio, and variable operating condition range of the centrifugal compressor.

[0003] Most of the conventional technologies measure the external characteristics of the volute casing, and set up measurement points at its inlet and outlet to obtain flow parameters or environmental parameters at the inlet and outlet of the volute casing under different operating conditions to analyze the pressure boosting performance of the volute casing. However, there have been few detailed measurements or studies on the flow mechanism and loss distribution inside the volute casing. There have also been few in-depth studies on the effects of the circumferential asymmetry of the volute casing due to the tongue on the volute casing itself, the upstream and downstream flow fields, and the overall performance of the machine. There have also been no systematic measurements of the entire machine's throughflow area, combined adjustment of variable operating conditions, measurement of all operating conditions, and measurement of the entire flow field. This makes it difficult to further efficiently optimize the design of the volute casing and accurately predict its performance with high accuracy. Summary of the Invention [Means for solving the problem]

[0004] The purpose of this application is to at least solve the following technical problems: most of the previous measurements were related to the external characteristics of the volute casing, there were few detailed measurements and studies on the flow mechanism inside the volute casing, there was almost no in-depth consideration of the influence of the circumferential asymmetry of the volute casing due to the tongue, and there was no systematic measurement of the entire throughflow area of ​​the entire machine, coupled adjustment of variable operating conditions, measurement of all operating conditions, and measurement of the entire flow field, making it impossible to further efficiently optimize the design of the volute casing and to predict its performance with high accuracy. This purpose is achieved by the following technical solutions:

[0005] In a first aspect of the present application, there is provided a measurement device for a volute casing assembly, including a spiral passage, a diffuser pipe, an outlet extension, and a tongue, wherein the spiral passage is used to collect, decelerate, and increase the pressure of a fluid flowing out from an upstream side, the diffuser pipe is connected to the outlet of the spiral passage and is used to decelerate and increase the pressure of the fluid, the outlet extension is connected to the outlet of the diffuser pipe and is used to straighten the flow of the fluid flowing out, and the tongue is connected to the inlet of the spiral passage and is used to convert the kinetic energy of the passing fluid, guide the flow, and reduce flow separation, which has a circumferentially asymmetric effect on the volute casing assembly itself, the upstream and downstream flow fields, and the overall machine performance, and the spiral passage, the diffuser pipe, and the outlet extension are provided with measurement points for detecting and acquiring flow parameters of the fluid and environmental parameters at predetermined positions.

[0006] In this application, the measurement device for the volute casing assembly performs systematic measurements based on the operating conditions of the entire machine during actual measurements, including the entire pass-through area of ​​the entire machine, combined adjustment of variable operating conditions, measurement of all operating conditions, and measurement of the entire flow field. By arranging measurement points in the spiral passage, the diffuser pipe, and the outlet extension, respectively, it is possible to analyze the fluid flow parameters and environmental parameters and analyze the performance of the internal fluid of the volute casing assembly, which contributes to more efficient optimization design and more accurate performance prediction of the volute casing assembly.

[0007] In some embodiments, a projection of the spiral passage along the central axis forms an inner ring line and an outer ring line, the distance between the inner ring line and the outer ring line gradually increasing along the fluid flow direction and equal to the width of the portion corresponding to the cross section of the spiral passage.

[0008] In some embodiments, the measurement points include a plurality of first measurement points spaced apart along the inner ring line.

[0009] In some embodiments, the distance between two adjacent first measurement points is equal.

[0010] In some embodiments, the measurement points include a plurality of first measurement points spaced apart along the inner ring line.

[0011] In some embodiments, the distance between two adjacent first measurement points is equal.

[0012] In some embodiments, the arrangement of the tongues causes the spiral path to be asymmetric in the circumferential direction, with the spacing between first measurement points closer to the tongues being smaller than the spacing between first measurement points further from the tongues.

[0013] In some embodiments, the measurement points include a plurality of second measurement points spaced along the outer ring line, the second measurement points being used to detect flow parameters and environmental parameters of the fluid flowing along the spiral path.

[0014] In some embodiments, the distance between two adjacent second measurement points is equal.

[0015] In some embodiments, the spacing between the second measurement points closer to the tongue along the direction of fluid flow is smaller than the spacing between the second measurement points further from the tongue.

[0016] In some embodiments, the first measurement point and the second measurement point are each provided with a detection sensor.

[0017] In a second aspect of the present application, there is provided a centrifugal compressor applied to a compressed air energy storage system, the centrifugal compressor including the measuring device for the volute casing assembly of the present application. [Brief explanation of the drawings]

[0018] Various additional benefits and advantages will become apparent to those skilled in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are used only to illustrate the preferred embodiments and are not intended to limit the present application. The same reference numerals refer to the same components throughout the accompanying drawings. [Figure 1] FIG. 1 is a schematic diagram showing the overall structure of a measuring device for a volute casing according to one embodiment of the present invention. [Figure 2] FIG. 2 is a schematic diagram showing an arrangement of fourth measurement points in a second diffuser pipe section according to an embodiment of the present invention. [Figure 3] FIG. 3 is a schematic diagram illustrating the placement of the fifth measurement point in the outlet extension according to one embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0019]

[0023] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are illustrated in the accompanying drawings, the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more complete understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0020] The terminology used herein is for the purpose of describing particular example embodiments and is not intended to be limiting. As used herein, the singular forms "a," "an," and "said" are intended to include the plural unless the context clearly indicates otherwise. The terms "comprise," "contain," and "have" are inclusive and thus specify the presence of stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0021] In this specification, terms such as "first" and "second" may be used to describe multiple elements, components, regions, layers, and / or sections, but these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another region, layer, or section. Unless otherwise clearly indicated by the context, terms such as "first" and "second" and other numerical terms do not imply an order or sequence when used in this specification. Furthermore, unless explicitly specified or limited in the description of this specification, the terms "provide" and "connect" should be understood in a broad sense, for example, to mean a fixed connection, a detachable connection, an integral connection, a direct connection, or an indirect connection via an intermediate medium. A person skilled in the art can understand the specific meaning of the above terms in this specification on a case-by-case basis.

[0022] For ease of description, spatially relative terms such as "top," "bottom," "inside," "outside," "end," "side," etc. may be used herein to describe the relationship of one element or feature to another element or feature shown in the figures. Such spatially relative terms are intended to encompass different orientations of the features in use or operation than those shown in the figures.

[0023] Hereinafter, examples of the present application will be described in conjunction with FIGS. 1 to 3 of the present specification.

[0024] 1, according to an embodiment of the present invention, in one aspect, a measurement device for a volute casing assembly is disclosed, which includes a spiral passage 1, a diffuser pipe 2, an outlet extension 3, and a tongue 4. The spiral passage 1 is used to collect, decelerate, and increase the pressure of fluid flowing out from the upstream side, the diffuser pipe 2 is connected to the outlet of the spiral passage 1 and is used to decelerate and increase the pressure of the fluid, the outlet extension 3 is connected to the outlet of the diffuser pipe 2 and is used to straighten the flow of the outflowing fluid, and the tongue 4 is connected to the inlet of the spiral passage 1 and is used to convert the kinetic energy of the passing fluid, guide the flow, and reduce flow separation, which has a circumferentially asymmetric effect on the volute casing assembly itself, the upstream and downstream flow fields, and the overall machine performance. The spiral passage 1, the diffuser pipe 2, and the outlet extension 3 are provided with measurement points for detecting and obtaining fluid flow parameters and environmental parameters at predetermined positions.

[0025] In this application, the measurement device for the volute casing assembly performs systematic measurements based on the operating conditions of the entire machine in actual measurements, including the entire pass-through area of ​​the entire machine, coupled adjustment of variable operating conditions, measurement of all operating conditions, and measurement of the entire flow field. By arranging measurement points for detecting and obtaining fluid flow parameters and environmental parameters at predetermined positions in the spiral passage 1, the diffuser pipe 2, and the outlet extension 3, respectively, the fluid flow parameters and environmental parameters can be analyzed to analyze the internal fluid performance of the volute casing assembly, contributing to more efficient optimization design and more accurate performance prediction of the volute casing assembly.

[0026] In actual measurement, the measuring device for the volute casing assembly of the present application is provided with an inlet passage, a guide vane assembly, an impeller assembly, and a diffuser assembly (not shown) on the upstream side, the inlet passage is provided with a guide vane assembly for adjusting the inflow direction of the fluid, the impeller assembly is provided downstream of the guide vane assembly for dynamically pressurizing the fluid, and the diffuser assembly is provided downstream of the impeller assembly for statically decelerating and pressurizing the fluid flowing out from the impeller assembly, the diffuser assembly is configured so that the pressure boost angle can be adjusted according to the direction of the fluid flowing out from the impeller assembly, and the downstream side of the diffuser assembly is connected to the measuring device for the volute casing assembly. During measurement, the fluid flows in through the inlet passage and passes through the guide vane assembly, impeller assembly, diffuser assembly, tongue 4, spiral passage 1, first diffuser pipe section 21, second diffuser pipe section 22, and outlet extension section 3 in order, thereby realizing performance measurement of the volute casing assembly in the entire passage area of ​​the entire machine and improving measurement accuracy.

[0027] Furthermore, by adjusting at least one variable among the angle of the guide vane assembly, the rotational speed of the impeller assembly, and the booster angle of the diffuser assembly during measurement, the volute casing assembly can be measured under variable operating conditions and under all operating conditions.

[0028] That is, the measurement points of the present application (including the first measurement point 100, the second measurement point 200, the third measurement point 300, the fourth measurement point 400, and the fifth measurement point 500) are based on systematic measurements of the entire throughflow area of ​​the entire machine, the coupled adjustment of variable operating conditions, measurements of all operating conditions, and measurements of the entire flow field, to carry out measurements of the external characteristics and internal flow characteristics of the inlet and outlet of the volute casing assembly, to accumulate a valuable actual database, and by combining this with mechanism analysis of the internal flow field, the design can be optimized more efficiently and performance predictions can be made with high accuracy.

[0029] The flow parameters of the fluid include at least one of the pressure, temperature, velocity, flow rate, vibration displacement, phase concentration, viscosity, Reynolds number, and surface tension of the fluid, and the environmental parameters of the fluid include at least one of the sound pressure decibels, humidity, surface roughness, and wear amount of the environment in which the fluid is located.

[0030] Specifically, pressure includes static pressure, total pressure, and differential pressure, temperature includes static temperature and total temperature, flow velocity includes mean velocity, instantaneous velocity, absolute velocity, relative velocity, and peripheral velocity, flow rate includes volumetric flow rate and mass flow rate, oscillatory displacement includes low frequency, medium frequency, and high frequency, phase concentration includes gas-liquid and liquid-solid, viscosity includes Newtonian and non-Newtonian, Reynolds number includes laminar, transitional, and turbulent flow, and surface tension includes static and dynamic.

[0031] Specifically, sound pressure decibels include fluid noise, mechanical noise, and electromagnetic noise, humidity includes absolute humidity and relative humidity, surface roughness includes average roughness and maximum height, and wear amount includes abrasive particles, adhesion, and fatigue.

[0032] In this embodiment, the fluid may be a medium in a gas phase, a liquid phase, or a gas-liquid two-phase flow, such as air, carbon dioxide gas, nitrogen gas, or helium gas.

[0033] 1 , in some embodiments, a projection of the spiral passage 1 along the central axis thereof defines an inner ring line 11 and an outer ring line 12, with the distance between the inner ring line 11 and the outer ring line 12 gradually increasing along the fluid flow direction and equal to the width of the cross-section of the spiral passage 1. The measurement points 100 include a plurality of first measurement points 100 spaced apart along the inner ring line 11. The first measurement points 100 are used to detect flow parameters and environmental parameters of the fluid flowing along the spiral passage 1.

[0034] By setting a plurality of first measurement points 100, the plurality of first measurement points 100 are spaced apart in the spiral passage 1 along the inner ring line 11. The first measurement points 100 are used to detect flow parameters and environmental parameters of the fluid flowing along the spiral passage 1 and to obtain changes in the flow characteristics of the fluid flowing along the inner ring line 11 of the spiral passage 1.

[0035] In this embodiment, the arrangement of the tongues 4 makes the spiral passage 1 asymmetric in the circumferential direction, with the spacing between the first measurement points 100 closer to the tongues 4 being smaller than the spacing between the first measurement points 100 further from the tongues 4.

[0036] Because the flow characteristics of the fluid change significantly as it flows through the tongue 4, the first measurement points 100 are arranged densely near the tongue 4 and sparsely at positions farther from the tongue 4. This allows for better detection of changes in the flow characteristics of the fluid while taking installation costs into consideration.

[0037] Note that the outer ring line 12 coincides with the outline of the volute casing assembly, and the inner ring line 11 coincides with the boundary line between the upstream fluid and the volute casing assembly. That is, the inner ring line 11 is closer to the upstream impeller assembly, which has circumferential equalization capability, and the outer ring line 12 is farther from the upstream impeller assembly. Therefore, the flow field near the inner ring line 11 is less affected by the circumferential asymmetry of the volute casing than the flow field near the outer ring line 12. Therefore, in other embodiments, the intervals between two adjacent first measurement points 100 may also be set equal, that is, multiple first measurement points 100 may be evenly spaced along the inner ring line 11.

[0038] As shown in FIG. 1 , in some embodiments, the measurement points include a plurality of second measurement points 200 spaced along the outer ring line 12, which are used to detect flow parameters and environmental parameters of the fluid flowing along the spiral passage 1.

[0039] A plurality of second measurement points 200 are provided at intervals on the spiral passage 1 along the outer ring line 12, and the flow parameters and environmental parameters of the fluid flowing along the spiral passage 1 can be detected through the second measurement points 200, thereby obtaining changes in the flow characteristics of the fluid flowing along the outer ring line 12 of the spiral passage 1. As shown in FIG. 1 , in this embodiment, the intervals between the second measurement points 200 closer to the tongue 4 along the fluid flow direction are smaller than the intervals between the second measurement points 200 farther from the tongue 4.

[0040] Because the flow characteristics of the fluid change significantly when it flows through the tongue 4, the second measurement points 200 are provided densely near the tongue 4 and sparsely at positions farther from the tongue 4. This allows for better detection of changes in the flow characteristics of the fluid while taking installation costs into consideration.

[0041] In the prior art, there has been little detailed consideration of the effect on fluid flow of the circumferential asymmetry of the volute casing assembly due to the tongue 4. In the present application, this point is fully taken into consideration, and the first measurement points 100 and second measurement points 200 are arranged more densely near the tongue 4 to improve measurement accuracy.

[0042] In an alternative embodiment, the spacing between two adjacent second measurement points 200 is equal, i.e., the second measurement points 200 are evenly spaced along the outer ring line 12 .

[0043] As shown in FIG. 1, the diffuser pipe 2 gradually widens along the direction of fluid flow, e.g., it can be configured as a trumpet pipe with a gradually increasing cross section, which serves to decelerate and increase the pressure of the fluid passing through it.

[0044] In some embodiments, the diffuser pipe 2 includes a first diffuser pipe section 21 and a second diffuser pipe section 22, the first diffuser pipe section 21 being connected to both the tongue 4 of the measurement device of the volute casing assembly and the outlet of the spiral passage 1, and the second diffuser pipe section 22 being connected to an end of the first diffuser pipe section 21 remote from the spiral passage 1. The measurement points include a plurality of third measurement points 300 spaced along the length of the first diffuser pipe section 21, the third measurement points 300 being used to detect flow parameters and environmental parameters of the fluid flowing along the first diffuser pipe section 21.

[0045] A plurality of third measurement points 300 spaced along the length of the first diffuser pipe section 21 can detect the fluid flowing through the first diffuser pipe section 21, acquire the flow parameters and environmental parameters of the fluid, and analyze changes in the characteristics of the fluid flowing along the first diffuser pipe section 21.

[0046] Specifically, by arranging the third measurement points 300 at equal intervals along the fluid flow direction in the first diffuser pipe section 21, it is possible to obtain easily comparable detection data. Of course, in other embodiments, the third measurement points 300 may be arranged in the first diffuser pipe section 21 at intervals that gradually increase along the fluid flow direction.

[0047] In some embodiments, the measurement points include a group of multiple fourth measurement points 400 spaced along the length of the second diffuser pipe section 22, and the fourth measurement points 400 are used to detect flow parameters and environmental parameters of the fluid flowing along the second diffuser pipe section 22.

[0048] A plurality of fourth measurement points 400 spaced along the length of the second diffuser pipe section 22 can detect the fluid flowing through the second diffuser pipe section 22, acquire the flow parameters and environmental parameters of the fluid, and analyze changes in the characteristics of the fluid flowing along the second diffuser pipe section 22.

[0049] As shown in FIG. 2 , in some embodiments, each group of fourth measurement points 400 includes a plurality of fourth measurement points 400 located on the same plane, one of which is located on the central axis of the diffuser pipe 2, and the remaining fourth measurement points 400 are located at intervals along the circumferential direction of the fourth measurement point 400 on the central axis and along the radial direction of the diffuser pipe 2.

[0050] The multiple fourth measurement points 400 in each group are located on the same plane, with one of the fourth measurement points 400 located on the central axis of the diffuser pipe 2 and the remaining fourth measurement points 400 located circumferentially around the central axis of the diffuser pipe 2 and spaced apart radially from the fourth measurement point 400. This allows the fluid flowing into the second diffuser pipe section 22 at multiple locations in the center, radial, and circumferential directions to be detected and multiple sets of detection data to be obtained, improving detection accuracy. In some embodiments, in each group of fourth measurement points 400, the multiple fourth measurement points 400 on the same circumference are evenly distributed and arranged to form a circular region, and the difference in area between any two adjacent circular regions along the radial direction of the diffuser pipe 2 is equal.

[0051] When arranging the multiple fourth measurement points 400 in the second diffuser pipe section 22, the "equal area method" is adopted to distribute the multiple fourth measurement points 400 evenly within the second diffuser pipe section 22, and the characteristics of the surface are represented by the characteristics of multiple points within the surface. This allows the fluid flow parameters and environmental parameters at each position within the second diffuser pipe section 22 to be obtained, making the measurement data more comprehensive and accurate.

[0052] In some embodiments, the number of fourth measurement points 400 on each circumference is set to be equal, the fourth measurement points 400 on each circumference are provided in one-to-one correspondence, and multiple fourth measurement points 400 located on the same diameter are fixed together by first brackets, and the first brackets are inserted or penetrated radially into the second diffuser pipe section 22. This arrangement makes it possible to easily fix multiple fourth measurement points 400. By fixing multiple fourth measurement points 400 located on the same diameter together via the same first bracket, the number of brackets can be reduced, and it is possible to avoid resistance to fluid flow caused by using too many brackets.

[0053] Preferably, the measurement plane formed by the plurality of fourth measurement points 400 in each group is perpendicular to the central axis of the second diffuser pipe section 22, thereby improving the accuracy of fluid detection by the fourth measurement points 400. Of course, in other embodiments, the measurement plane formed by the plurality of fourth measurement points 400 in each group and the central axis of the second diffuser pipe section 22 may be arranged at other angles, which is not limited to this embodiment.

[0054] In this embodiment, four fourth measurement points 400 are evenly spaced on each circumference, and eleven fourth measurement points 400 are distributed on the same diameter, for a total of 21 (4 x 5 + 1 = 21) fourth measurement points 400, but this is not limiting. In other embodiments, the number of fourth measurement points 400 can be adjusted as needed.

[0055] Specifically, the diameter of the outlet extension 3 is equal to the outlet diameter of the second diffuser pipe section 22, and the inlet diameter of the first diffuser pipe section 21 is equal to the outlet diameter of the spiral flow passage 1, making the connection easy.

[0056] 3 , in some embodiments, the measurement points include a plurality of fifth measurement points 500 located on the same plane, the fifth measurement points 500 being located between the inlet and the outlet of the outlet extension 3. One of the fifth measurement points 500 is located on the central axis of the outlet extension 3, and the remaining fifth measurement points 500 are located at intervals circumferentially around the fifth measurement point 500 on the central axis and radially around the outlet extension 3. The fifth measurement points 500 are used to detect flow parameters and environmental parameters of the fluid flowing along the outlet extension 3.

[0057] The plurality of fifth measurement points 500 are located on the same plane, with one fifth measurement point 500 located on the central axis of the outlet extension 3, and the remaining fifth measurement points 500 being spaced apart along the circumferential direction of the fifth measurement point 500 on the central axis and along the radial direction of the outlet extension 3. This allows fluid flowing into multiple locations at the center, radially, and circumferentially of the outlet extension 3 to be detected, thereby obtaining multiple sets of detection data and improving detection accuracy. In some embodiments, the plurality of fifth measurement points 500 located on the same circumference are evenly distributed and arranged to form a surrounding circular area, and the difference in area between any two adjacent circular areas along the radial direction of the outlet extension 3 is equal.

[0058] When arranging the multiple fifth measurement points 500 in the above-mentioned outlet extension 3, the "equal area method" is adopted to evenly distribute the multiple fifth measurement points 500 within the outlet extension 3, and the characteristics of the surface are represented by the characteristics of multiple points within the surface, thereby obtaining the fluid flow parameters and environmental parameters at each position within the outlet extension 3, making the measurement data more comprehensive and accurate.

[0059] In some embodiments, the number of fifth measurement points 500 on each circumference is set to be equal, the fifth measurement points 500 on each circumference are provided in one-to-one correspondence, and multiple fifth measurement points 500 located on the same diameter are fixed together by second brackets, and the second brackets are inserted or penetrated radially into the second outlet extension 3. This arrangement makes it possible to easily fix multiple fifth measurement points 500. By fixing multiple fifth measurement points 500 located on the same diameter together via the same second bracket, the number of brackets can be reduced, and it is possible to avoid resistance to fluid flow caused by using too many brackets.

[0060] Preferably, the measurement plane formed by the plurality of fifth measurement points 500 is perpendicular to the central axis of the outlet extension 3, thereby improving the accuracy of fluid detection by the fifth measurement points 500. Of course, in other embodiments, the measurement plane formed by the plurality of fifth measurement points 500 and the central axis of the outlet extension 3 may be arranged at other angles, which is not limited to this embodiment.

[0061] 3, in this embodiment, four fifth measurement points 500 are evenly spaced on each circumference, and eleven fifth measurement points 500 are distributed on the same diameter, for a total of 21 (4 × 5 + 1 = 21) fifth measurement points 500. However, this is not limiting. In other embodiments, the number of fifth measurement points 500 can be adjusted as needed.

[0062] Note that a detection sensor is provided at each of the first measurement point 100, the second measurement point 200, the third measurement point 300, the fourth measurement point, and the fifth measurement point, and the flowing fluid can be detected by this detection sensor.

[0063] The detection sensor includes at least one of a contact sensor and a non-contact sensor.

[0064] The contact sensor may be at least one of a piezoresistive pressure sensor, a strain gauge pressure gauge, a thermocouple, a thermistor, a turbine flow meter, an electromagnetic flow meter, a differential pressure flow meter, a target flow meter, an accelerometer, a strain gauge, a conductivity sensor, a capacitance sensor, a rotational viscometer, a capillary viscometer, a multi-parameter composite sensor, a du Nouy method sensor, a plate method sensor, a contact microphone, a capacitance hygrometer, a stylus profiler, and a displacement sensor.

[0065] The non-contact sensor may be at least one of a piezoelectric pressure sensor, a capacitive pressure sensor, an infrared thermometer, an ultrasonic flow meter, a laser Doppler velocimeter (LDV), a non-contact electromagnetic flow meter, an ultrasonic flow meter, a laser vibrometer, a near-infrared spectrum sensor, a microwave sensor, a microwave / radio frequency sensor, a non-contact flow meter + viscosity sensor, a laser surface roughness sensor, a laser microphone, an infrared humidity sensor, a microwave humidity sensor, a laser interferometer, a white light interferometer, an ultrasonic thickness gauge, and an optical 3D scanner.

[0066] According to another aspect of the present invention, there is disclosed a centrifugal compressor applied to a compressed air energy storage system, the centrifugal compressor including the measuring device of the present volute casing assembly.

[0067] Since the centrifugal compressor of the present application includes the measurement device for the volute assembly of the present application, the centrifugal compressor of the present application has the same technical effect as the measurement device for the volute assembly of the present application, but the description thereof will be omitted here. In this embodiment, the centrifugal compressor further includes an inlet passage, a guide vane assembly, an impeller assembly, a variable diffuser, and an outlet passage. The guide vane assembly is provided in the inlet passage, the impeller assembly is provided downstream of the guide vane assembly, the variable diffuser is provided downstream of the impeller assembly, the downstream of the variable diffuser is connected to the volute assembly, and the outlet of the volute assembly is connected to the outlet passage.

[0068] The inlet passage, guide vane assembly, impeller assembly, variable diffuser, and outlet passage are all conventional and will not be described in detail herein.

[0069] The above are merely preferred specific embodiments of the present application, and the scope of protection of the present application is not limited thereto. Any modifications or alternatives that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application shall be included in the scope of protection of the present application. [Explanation of symbols]

[0070] 1 spiral passage 2 Diffuser pipe 3 Exit extension 4 Tongue 11 Inner Ring Line 12 Outer Ring Line 21 First diffuser pipe section 22 Second diffuser pipe section 100 1st measurement point 200 2nd measurement point 300 3rd measurement point 400 4th measurement point 500 5th measurement point

Claims

1. a spiral passage (1) for converging, decelerating and increasing the pressure of the fluid flowing out from the upstream side; a diffuser pipe (2) connected to the outlet of the spiral passage (1) for decelerating and increasing the pressure of the fluid; an outlet extension (3) connected to the outlet of the diffuser pipe (2) for rectifying the flow of the outflowing fluid; a tongue (4) connected to the inlet of the spiral passage (1), which converts kinetic energy and guides the flow of the passing fluid, and is used to reduce flow separation, resulting in circumferentially asymmetric effects on the spiral casing assembly itself, the upstream and downstream flow fields, and the performance of the entire equipment; 1. A measuring device for a volute casing assembly, characterized in that the spiral passage (1), the diffuser pipe (2) and the outlet extension (3) are provided with measuring points, which are used to detect and obtain fluid flow parameters and environmental parameters at predetermined positions.

2. 2. The measuring device for a volute casing assembly according to claim 1, wherein an inner ring line (11) and an outer ring line (12) are formed in a projection of the spiral passage (1) along the central axis, and the distance between the inner ring line (11) and the outer ring line (12) gradually increases along the fluid flow direction and is equal to the width of the portion corresponding to the cross section of the spiral passage (1).

3. 3. The measuring device for a volute casing assembly according to claim 2, wherein the measuring points include a plurality of first measuring points (100), the plurality of first measuring points (100) being spaced apart along the inner ring line (11).

4. 4. The measuring device for a volute casing assembly according to claim 3, wherein the distances between two adjacent first measuring points (100) are equal.

5. 4. The measuring device for a volute casing assembly according to claim 3, characterized in that due to the arrangement of the tongues (4), the spiral passage (1) is asymmetric in the circumferential direction, and the spacing between the first measurement points (100) closer to the tongues (4) is smaller than the spacing between the first measurement points (100) further from the tongues (4).

6. 4. The measuring device for a volute casing assembly according to claim 3, characterized in that the measuring points include a plurality of second measuring points (200), the plurality of second measuring points (200) being spaced apart along the outer ring line (12), the second measuring points (200) being used to detect flow parameters and environmental parameters of a fluid flowing along the spiral passage (1).

7. The measuring device for a volute casing assembly according to claim 6, characterized in that the distances between two adjacent second measuring points (200) are equal.

8. 7. The measuring device for a volute casing assembly according to claim 6, characterized in that, along the fluid flow direction, the spacing between the second measuring points (200) closer to the tongue (4) is smaller than the spacing between the second measuring points (200) further from the tongue (4).

9. 7. The measuring device for a volute casing assembly according to claim 6, wherein the first measuring point (100) and the second measuring point (200) are provided with detection sensors, respectively.

10. A centrifugal compressor applied to a compressed air energy storage system, characterized in that it comprises a measuring device for a volute casing assembly according to any one of claims 1 to 9.

Images