CN114526262A - Volute component and air compressor - Google Patents
Volute component and air compressor Download PDFInfo
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- CN114526262A CN114526262A CN202210255797.4A CN202210255797A CN114526262A CN 114526262 A CN114526262 A CN 114526262A CN 202210255797 A CN202210255797 A CN 202210255797A CN 114526262 A CN114526262 A CN 114526262A
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 13
- 238000007599 discharging Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 5
- 230000006837 decompression Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 42
- 239000000446 fuel Substances 0.000 description 19
- 239000000306 component Substances 0.000 description 8
- 238000009434 installation Methods 0.000 description 5
- 239000002912 waste gas Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a volute assembly and an air compressor, the volute assembly comprises a shell, an impeller and a plurality of flow guide pieces, the shell comprises a cavity, a first flow passage and a second flow passage, the first flow passage is communicated with the cavity and surrounds the outer peripheral side of the cavity, the second flow passage is suitable for introducing gas and discharging the gas into the cavity in a decompression mode, the impeller is rotatably arranged in the cavity, one part of the impeller is matched with an inlet of the first flow passage, the outer peripheral surface of the impeller and the inner peripheral surface of the first flow passage are arranged at intervals, the plurality of flow guide pieces are arranged on one side, close to the second flow passage, of the inlet of the first flow passage, the flow guide pieces and one part of the impeller are arranged at intervals along the axial direction of the impeller, the plurality of flow guide pieces are arranged at intervals along the circumferential direction of the impeller to form an air flow passage, and the extending direction of the flow guide pieces intersects with the radial direction of the impeller to form an included angle. The volute component has the advantages of simple structure, high working efficiency, small energy loss and the like.
Description
Technical Field
The invention relates to the technical field of fuel cell engines, in particular to a volute component and an air compressor.
Background
The air compressor is one of the core components of the hydrogen fuel cell, and is used for continuously providing high-pressure air for the fuel cell stack. In the fuel cell system, the power consumption of the air compressor accounts for about 20% of the output power of the fuel cell, and the reduction of the power consumption of the air compressor has important significance in improving the efficiency and the output power of the fuel cell system.
In the related art, the air compressor has the defects of high energy loss, high noise and low working efficiency.
Disclosure of Invention
The present invention is based on the discovery and recognition by the inventors of the following facts and problems:
in the related art, for example, patent nos.: CN202021771557.2, high-pressure air enters the turbine after the reaction in the galvanic pile, causes the pressure difference between compressor impeller and turbine impeller in this technical scheme, and the pressure difference between compressor end and turbine end in the integral impeller structure will drive the air current to leak from the compressor impeller and enter the turbine impeller from the clearance. This leakage flow has a multi-sided negative effect on the performance of the air compressor: 1. as gas leaks from the high pressure stage impeller outlet into the turbine (the second impeller portion in this application), the compressor outlet flow is reduced, i.e. the amount of air entering the fuel cell stack is reduced. Therefore, to realize the same air intake of the galvanic pile, the inlet flow of the compressor needs to be increased, and the power consumption of the motor is increased. 2. The leakage flow entering the turbine from the clearance has a high axial speed, and extremely strong disturbance is caused to the internal flow field of the turbine at the inlet of the turbine impeller, so that the flow loss in the impeller is increased. The efficiency of the turbine is reduced, the energy of the recovered waste gas is reduced, and the power consumption of the motor is indirectly increased. Under the influence of the two aspects of leakage flow, the performance of the air compressor is reduced, the power consumption of the motor is increased, and the output power of the fuel cell system is reduced. 3. The leakage between the integral impellers is closely related to the pressure difference between the two ends of the compressor and the turbine. When the electric pile operates in a high-power state, the pressure ratio of the air compressor is high, the pressure difference between the air compressor and the turbine end is increased, and the leakage amount is increased. This will cause the efficiency of the air compressor to further decrease when the stack is operating at high power, which will significantly affect the output power of the fuel cell system.
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides the volute assembly which is light in weight, small in size and high in pneumatic efficiency.
The embodiment of the invention provides an air compressor with high pneumatic efficiency, low noise and high working efficiency.
The volute assembly of the embodiment of the invention comprises: the shell comprises a cavity, a first flow passage and a second flow passage, wherein the first flow passage is communicated with the cavity and surrounds the periphery of the cavity, the second flow passage is communicated with the cavity and surrounds the periphery of the cavity, the first flow passage is suitable for introducing gas and discharging the gas after the gas is pressurized into high-pressure gas, and the second flow passage is suitable for introducing the gas and discharging the gas into the cavity after the gas is depressurized; the impeller is rotatably arranged in the cavity, a part of the impeller is matched at an inlet of the first flow channel, and a part of the outer peripheral surface of the impeller and the inner peripheral surface of the first flow channel are arranged at intervals; a plurality of water conservancy diversion spare, it is a plurality of the water conservancy diversion spare is established the entry of first runner is close to one side of second runner, and is a plurality of the water conservancy diversion spare is followed the circumference interval of impeller sets up in order to form airflow channel, the extending direction of water conservancy diversion spare with the radial crossing of impeller is the contained angle.
According to the volute component provided by the embodiment of the invention, the plurality of flow guiding pieces are arranged, so that leakage flow and waste gas of the electric pile enter the second impeller part along the radius direction of the impeller, the severe mixing loss of the leakage flow and the waste gas at the inlet of the second impeller part due to different directions is avoided, the energy loss of the second impeller part from the recovery of the leakage flow and the waste gas of the electric pile is further avoided, and the overall performance of the air compressor is improved.
In some embodiments, two adjacent flow guide members include a first flow guide member and a second flow guide member, and at least a part of the first flow guide member is arranged opposite to the second flow guide member in the inward and outward direction at a distance.
In some embodiments, the cross-sectional area of the baffle increases from the inside to the outside.
In some embodiments, the flow guide extends in a direction which is at an angle of 70 ° to 80 ° to the radial direction of the impeller.
In some embodiments, the chamber includes a first chamber and a second chamber that are connected, the first flow passage is connected to the first chamber and surrounds an outer periphery of the first chamber, the second flow passage is connected to the second chamber and surrounds an outer periphery of the second chamber, a portion of the impeller is rotatably disposed in the first chamber, and another portion of the impeller is rotatably disposed in the second chamber.
In some embodiments, an inlet of the first flow passage is provided with a mounting groove adjacent to one side of the second flow passage, the mounting groove is communicated with the second chamber, a portion of the impeller is disposed in the mounting groove and spaced from an inner circumferential surface of the mounting groove in an inward and outward direction, and the guide member is disposed at one side of the mounting groove adjacent to the second flow passage.
In some embodiments, the first flow passage includes a first subsection and a second subsection which are communicated with each other, the first subsection surrounds the outer periphery side of the chamber, the second subsection extends along the radial direction of the impeller, the first subsection is communicated with the chamber through the second subsection, and the mounting groove is arranged on one side of the second subsection far away from the second flow passage.
In some embodiments, the impeller includes a first impeller portion rotatably disposed within the first chamber and a second impeller portion rotatably disposed within the second chamber, the number of blades of the second impeller portion being less than the number of deflectors.
In some embodiments, the number of flow guides and the number of blades of the second impeller portion are non-integer.
The air compressor of the embodiment of the invention comprises: a housing; the rotating shaft is rotatably arranged in the shell; the volute component is any one of the volute components in the above embodiments, and the rotating shaft is connected with an impeller of the volute component so that the rotating shaft drives the impeller to rotate.
Drawings
Fig. 1 is a schematic structural view of an air compressor according to an embodiment of the present invention.
FIG. 2 is a schematic structural view of a volute assembly in accordance with an embodiment of the present invention.
Figure 3 is a perspective view of a volute assembly of an embodiment of the present invention.
Figure 4 is a schematic view of the installation of the baffle of the volute assembly of an embodiment of the present invention.
Reference numerals:
a volute assembly 100;
an air compressor 10;
a housing 1; a chamber 11; an inlet 111; an outlet 112; a first cavity 113; a second chamber 114;
a first flow channel 12; a first gas inlet 121; a first air outlet 122; a first portion 123; a second portion 124; a mounting groove 125; a first subsection 126; a second subsection 127;
a second flow passage 13; a second air inlet 131; a second air outlet 132;
an impeller 2; the first impeller portion 21; the second impeller portion 22;
a flow guide member 3; a first flow guide 31; a second baffle member 32;
a housing 4; a rotating shaft 5; and a motor 6.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A volute assembly of an embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 1-4, the volute assembly of an embodiment of the present invention includes a housing 1, an impeller 2, and a plurality of deflectors 3.
The housing 1 comprises a chamber 11, a first flow passage 12 and a second flow passage 13, wherein the first flow passage 12 is communicated with the chamber 11 and surrounds the outer periphery of the chamber 11, the second flow passage 13 is communicated with the chamber 11 and surrounds the outer periphery of the chamber 11, the first flow passage 12 is suitable for introducing gas and discharging the gas after the gas is pressurized into high-pressure gas, and the second flow passage 13 is suitable for introducing the gas and discharging the gas into the chamber 11 after the gas is depressurized.
As shown in fig. 1-2, a chamber 11 penetrates through a housing 1 in the left-right direction, a first flow passage 12 and a second flow passage 13 are arranged around the outer periphery of the chamber 11, the chamber 11 has an inlet 111 and an outlet 112 communicating with the chamber 11 in the left-right direction, the first flow passage 12 has a first gas inlet 121 and a first gas outlet 122, the second flow passage 13 has a second gas inlet 131 and a second gas outlet 132, the first gas inlet 121 communicates with the chamber 11, the first gas outlet 122 can be connected with external equipment (such as an intercooler, a humidifier and a fuel cell stack), the second gas inlet 131 communicates with an outlet of exhaust gas of the fuel cell stack, the second gas outlet 132 communicates with the chamber 11, the first flow passage 12 cooperates with an impeller 2 of an external compressor to pressurize the gas to form high-pressure gas, so that the high pressure air flows into the external device through the inlet 111, the first air inlet 121 and the first air outlet 122 into the chamber 11, and performs work. The gas with a certain pressure discharged from the exhaust outlet of the fuel cell stack flows into the second flow channel 13 through the second gas inlet 131, then enters the chamber 11 to expand and drive the impeller 2 to do work and is discharged from the outlet 112, the exhaust gas expands and absorbs heat in the second flow channel 13, the temperature of the wall surface of the second flow channel 13 is reduced, and meanwhile, partial heat in the adjacent first flow channel 12 is taken away, so that the temperature in the first flow channel 12 is reduced, and the operating efficiency of pressurizing the gas in the first flow channel 12 is improved.
The impeller 2 is rotatably provided in the chamber 11, a portion of the impeller 2 is fitted at an inlet of the first flow passage 12, and an outer circumferential surface of the impeller 2 is spaced apart from an inner circumferential surface of the first flow passage 12. Specifically, as shown in fig. 1-2, the impeller 2 includes a first impeller portion 21 and a second impeller portion 22, the first impeller portion 21 is disposed on the left side of the second impeller portion 22, the first impeller portion 21 and the second impeller portion 22 are rotatably disposed in the chamber 11, the first impeller portion 21 cooperates with the first flow channel 12, the first impeller portion 21 rotates to pressurize the gas and then flow out through the first flow channel 12, the second impeller portion 22 cooperates with the second flow channel 13, the gas from the outlet of the exhaust gas of the fuel cell stack flows into the chamber 11 through the second flow channel 13, so as to drive the second impeller portion 22 to rotate, release energy to drive the second impeller portion 22 to rotate to do work, and further drive the first impeller portion 21 to rotate, thereby recovering energy from the exhaust gas and using the energy in the compressor, reducing power consumption of the motor 6, and thus improving output power of the fuel cell system. In addition, a part of the impeller 2 is inserted into the inlet of the first flow channel 12 and spaced apart from the first inlet 121 of the first flow channel 12, so as to divide the first inlet 121 of the first flow channel 12 into a first portion 123 and a second portion 124, the first portion 123 is located on the left side of the second portion 124, the gas flow flows into the first flow channel 12 through the first portion 123, most of the gas in the first portion 123 flows out through the first outlet 122, and due to a pressure difference between the outlet of the first impeller portion 21 and the inlet of the second impeller portion, a part of the compressed gas flows into the second impeller portion 22 from the first portion 123 through the second portion 124, that is, a leakage flow.
The plurality of flow guide parts 3 are arranged on one side, close to the second flow channel 13, of the inlet of the first flow channel 12, the plurality of flow guide parts 3 are arranged at intervals along the circumferential direction of the impeller 2 to form an airflow channel, and the extending direction of the flow guide parts 3 is intersected with the radial direction of the impeller 2 to form an included angle. Specifically, as shown in fig. 2 to 4, the plurality of flow guiding elements 3 are disposed on the right side surface of the second portion 124, and the plurality of flow guiding elements 3 are disposed at intervals along the circumferential direction of the impeller 2, the extending direction of the flow guiding elements 3 and the radial direction of the impeller 2 intersect to form an included angle, so that an air flow channel formed between two adjacent impellers 2 and the radial direction of the impeller 2 intersect to form an included angle, the leakage flow flows into the chamber 11 at a certain angle to drive the second impeller portion 22 to rotate, thereby avoiding energy loss caused by violent mixing of the leakage flow and the exhaust gas flowing out of the second flow channel 13 at the second air outlet 132 of the second flow channel 13 due to different directions, further avoiding energy loss of the second impeller portion 22 from recovery of the leakage flow and the stack exhaust gas, and further improving the overall performance of the air compressor 10.
When the differential pressure between the outlet 112 of the first impeller portion 21 and the inlet of the second impeller portion 22 increases (i.e., when the air compressor 10 is operating in a low flow-to-high pressure ratio condition, i.e., a near-surge condition), the leakage flow rate entering the second impeller portion 22 through the air flow passage increases. When the fuel cell system operates, the flow entering the fuel cell stack needs to be maintained to be the same, and at the moment, the flow of the inlet 111 of the air compressor is increased due to the existence of leakage flow, so that the pneumatic stability of the air compressor is improved, and the stable operation range of the system is widened. Since the leakage flow entering the second impeller portion 22 through the airflow path is increased, the energy recovered by the second impeller portion 22 is increased, and the overall performance of the air compressor 10 under the low-flow high-pressure ratio working condition is improved.
According to the volute component 100 provided by the embodiment of the invention, the plurality of flow guiding elements 3 are arranged, leakage airflow enters the second impeller portion 22 from the radial direction of the impeller 2, so that the interference and impact of the leakage flow on the airflow at the air outlet of the second flow channel 13 are avoided, the influence of the leakage flow on the pneumatic efficiency of the second impeller portion 22 is obviously reduced, the energy recovery of the second impeller portion 22 is further ensured, and the efficiency of a compressor and a fuel cell system is improved.
According to the inventor, the discovery is realized that: the leakage flow rate in the first flow passage 12 is closely related to the operating condition of the air compressor 10, and is a passive control method for the operating condition of the air compressor 10 system. During the life cycle of the fuel cell system, there are some conditions that require the air compressor 10 to operate in a near-surge region of small flow rate, high pressure ratio, where the pressure difference across the first impeller portion 21 and the second impeller portion 22 increases, and thus the leakage flow rate will increase. In order to maintain the same flow rate of the electric pile, the inlet flow rate of the air compressor is increased, so that the air compressor runs at a high-efficiency position with slightly larger flow rate, and the pneumatic stability of the air compressor 10 can be improved. In addition, the work of the leakage flow in the second impeller portion 22 is increased, so that the work recovered by the second impeller portion 22 is increased, the power consumption of the motor 6 of the air compressor 10 is reduced, and the overall performance of the air compressor 10 system under the non-design working condition is improved.
In some embodiments, the cross-sectional area of the baffle 3 increases gradually from the inside to the outside. Specifically, as shown in fig. 4, the outer peripheral profile of the flow guide member 3 is an airfoil shape so as to gradually reduce the airflow passage from inside to outside, the airflow is accelerated in the airflow passage under the action of the pressure difference between the compressor and the impeller 2 to convert the pressure energy of the airflow into kinetic energy, the energy of the airflow after accelerated expansion through the airflow passage is higher, the airflow with higher energy enters the second impeller portion 22 from an ideal direction, the airflow is further expanded in the impeller 2 to do work, and thus the energy recovered by the second airflow portion is increased, the power consumption of the compressor motor 6 is reduced, and the efficiency of the air compressor 10 is improved.
In some embodiments, two adjacent flow guiding members 3 include a first flow guiding member 31 and a second flow guiding member 32, and at least a portion of the first flow guiding member 31 is disposed opposite to the second flow guiding member 32 in the inward and outward direction. Specifically, as shown in fig. 4, the first guide member 31 and the second guide member 32 have an overlapping region in the inside and outside directions, and form an air flow passage having a small effective flow area, so that the speed of the leakage flow passing through the air flow passage is increased, the pressure energy is reduced, the air flow enters the second impeller portion 22 in the radial direction in a high-speed state, the high-speed air flow performs work in the turbine, and the energy is recovered by the turbine, thereby improving the performance of the air compressor 10.
In some embodiments the flow guide 3 extends at an angle of 70-80 ° to the radial direction of the impeller 2. Specifically, the included angle between the extending direction of the flow guide 3 and the radial direction of the impeller 2 is 70 °, 72 °, 74 °, 76 °, 78 ° and 80 °, so that the included angle between the extending direction of the flow guide 3 and the radial direction of the impeller 2 is close to the flowing direction of the leakage flow, the flow loss of the leakage flow is reduced, and meanwhile, the leakage flow guiding device has the function of guiding the leakage flow, and realizes effective work of the leakage flow entering the second impeller portion 22.
In some embodiments, the chamber 11 includes a first chamber 113 and a second chamber 114 that communicate with each other, the first flow passage 12 communicates with the first chamber 113 and surrounds an outer circumferential side of the first chamber 113, the second flow passage 13 communicates with the second chamber 114 and surrounds an outer circumferential side of the second chamber 114, a portion of the impeller 2 is rotatably disposed in the first chamber 113, and another portion of the impeller 2 is rotatably disposed in the second chamber 114. Specifically, as shown in fig. 1-2, the left portion of the chamber 11 is a first chamber 113, the right portion of the chamber 11 is a second chamber 114, the cross-sectional area of the first chamber 113 is smaller than the cross-sectional area of the second chamber 114, the first impeller portion 21 is rotatably installed in the first chamber 113, the first flow passage 12 surrounds the first chamber 113 and is communicated with the first chamber 113, so that the compressed gas generated by the rotation of the first impeller portion 21 flows out of the housing 1 through the first flow passage 12, the second impeller portion 22 is rotatably installed in the second chamber 114, and the second flow passage 13 surrounds the second chamber 114 and is communicated with the second chamber 114, so that the exhaust gas discharged from the fuel cell stack flows into the second chamber 114 through the second flow passage 13 to drive the second impeller portion 22 to rotate.
In some embodiments, an inlet of the first flow channel 12 is provided with a mounting groove 125 adjacent to one side of the second flow channel 13, the mounting groove 125 communicates with the second chamber 114, a portion of the impeller 2 is disposed in the mounting groove 125 and spaced apart from an inner circumferential surface of the mounting groove 125 in an inner and outer direction, and the guide member 3 is disposed on a side surface of the mounting groove 125. Specifically, as shown in fig. 1-2, the right side surface of the inlet of the first flow channel 12 is provided with a mounting groove 125, the outer peripheral side of a portion of the impeller 2 is spaced apart from the inner peripheral surface of the mounting groove 125, the outer peripheral surface of a portion of the impeller 2 is spaced apart from the inner peripheral surface of the mounting groove 125 in the inward and outward direction to form a gap, so that the leakage flow in the first flow channel 12 flows into the mounting groove 125 through the gap, the guide member 3 is provided on the right end surface of the mounting groove 125, and the left end surface of the guide member 3 is spaced apart from a portion of the impeller 2 in the leftward and rightward direction, so that the mounting groove 125 and the guide member 3 are prevented from being worn.
In some embodiments, first flow channel 12 includes a first subsection 126 and a second subsection 127 which are communicated with each other, first subsection 126 surrounds the outer periphery of chamber 11, second subsection 127 extends along the radial direction of impeller 2, first subsection 126 is communicated with chamber 11 through second subsection 127, and mounting groove 125 is arranged on one side of second subsection 127 far away from second flow channel 13. Specifically, as shown in fig. 1-2, the first subsection 126 surrounds the outer periphery of the first cavity 113, the second subsection 127 extends in the inner and outer directions and is respectively communicated with the first cavity 113 and the first subsection 126, the inlet of the first flow channel 12 is located at one end of the second subsection 127 adjacent to the first cavity 113, the installation groove 125 is arranged on the right side of the inlet of the second subsection 127 (i.e. the inlet of the first flow channel 12), a part of the impeller 2 is arranged in the installation groove 125 in the second subsection 127 in a penetrating manner, the left side of the impeller 2 and the second subsection 127 form a first part 123, and the right side of the impeller 2 and the inner peripheral surface of the installation groove 125 form a second part 124, so that the first flow channel 12 and the installation groove 125 are arranged more reasonably.
In some embodiments, the impeller 2 comprises a first impeller portion 21 and a second impeller portion 22, the first impeller portion 21 being rotatably disposed within the first cavity 11311, the second impeller portion 22 being rotatably disposed within the second cavity 11411, the number of blades of the second impeller portion 22 being less than the number of flow guide 3. Therefore, the number of the flow guide parts 3 is increased, the flow area of the airflow channel is reduced, and the flow velocity of the airflow is improved.
Since the impeller 2 is rotated during operation, the air guide member 3 is always in a stationary state, and if the number of the blades of the second impeller portion 22 is the same as or multiple of the number of the air guide member 3, a resonance phenomenon may occur, which may cause the blades of the second impeller portion 22 to break. Thus, in some embodiments, the number of flow guides 3 is a non-integer number with the number of blades of the second impeller portion 22. Thereby preventing the blades of the second impeller portion 22 from being broken and extending the service life of the second impeller portion 22.
In some embodiments, the trailing edge of the impeller 2 of the second impeller portion 22 is disposed opposite the deflector in the inward-outward direction, and the leading edge of the impeller 2 of the second impeller portion 22 is disposed opposite the second flow channel 13 in the inward-outward direction. Thereby, the leakage flow enters the second impeller portion 22 from the root position of the second impeller portion 22 in the radial direction in a high-speed state, so that the high-speed airflow does work in the second impeller portion 22, and the energy is recovered by the second impeller portion 22, thereby improving the performance of the air compressor 10.
The air compressor of the embodiment of the invention comprises a shell 4, a rotating shaft 5 and a volute component 100.
The shaft 5 is rotatably provided in the housing 4.
The volute assembly 100 is any one of the volute assemblies 100 in the above embodiments, and the rotating shaft 5 is connected to the impeller 2 of the volute assembly 100, so that the rotating shaft 5 drives the impeller 2 to rotate. Specifically, as shown in fig. 1, a motor 6 is disposed in the housing 4, and the volute assembly 100 is disposed at the left side of the housing 4, the motor 6 is connected to the impeller 2 of the volute assembly 100, so as to drive the motor 6 to rotate the impeller 2.
According to the air compressor 10 disclosed by the embodiment of the invention, the power consumption of the air compressor motor 6 is reduced, and the efficiency of the air compressor 10 is improved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although the above embodiments have been shown and described, it should be understood that they are exemplary and should not be construed as limiting the present invention, and that many changes, modifications, substitutions and alterations to the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A volute assembly, comprising:
the shell comprises a cavity, a first flow passage and a second flow passage, wherein the first flow passage is communicated with the cavity and surrounds the periphery of the cavity, the second flow passage is communicated with the cavity and surrounds the periphery of the cavity, the first flow passage is suitable for introducing gas and discharging the gas after the gas is pressurized into high-pressure gas, and the second flow passage is suitable for introducing the gas and discharging the gas into the cavity after the gas is depressurized;
the impeller is rotatably arranged in the cavity, a part of the impeller is matched at an inlet of the first flow channel, and a part of the outer peripheral surface of the impeller and the inner peripheral surface of the first flow channel are arranged at intervals;
a plurality of water conservancy diversion spare, it is a plurality of the water conservancy diversion spare is established the entry of first runner is close to one side of second runner, the water conservancy diversion spare with some of impeller is followed the axial interval of impeller sets up, and is a plurality of the water conservancy diversion spare is followed the circumference interval of impeller sets up in order to form airflow channel, the extending direction of water conservancy diversion spare with the radial crossing of impeller is the contained angle.
2. The volute assembly of claim 1, wherein two adjacent deflectors comprise a first deflector and a second deflector, at least a portion of the first deflector being spaced apart from and opposing the second deflector in an inboard-outboard direction.
3. The volute assembly of claim 1, wherein the flow guide has a cross-sectional area that increases from the inside to the outside.
4. The volute assembly of claim 1, wherein the flow guide extends in a direction that is between 70 ° and 80 ° from a radial direction of the impeller.
5. The volute assembly of claim 1, wherein the chamber comprises a first chamber and a second chamber in communication, the first flow passage is in communication with the first chamber and surrounds a perimeter side of the first chamber, the second flow passage is in communication with the second chamber and surrounds a perimeter side of the second chamber, a portion of the impeller is rotatably disposed within the first chamber, and another portion of the impeller is rotatably disposed within the second chamber.
6. The volute assembly of claim 5, wherein the inlet of the first flow passage is provided with a mounting groove adjacent to a side of the second flow passage, the mounting groove communicating with the second chamber, a portion of the impeller is disposed in the mounting groove and spaced apart from an inner circumferential surface of the mounting groove in an inner and outer direction, and the baffle member is disposed on a side of the mounting groove adjacent to the second flow passage.
7. The volute assembly of claim 6, wherein the first flow path includes a first subsection and a second subsection in communication with each other, the first subsection surrounds an outer circumferential side of the chamber, the second subsection extends in a radial direction of the impeller, the first subsection communicates with the chamber through the second subsection, and the mounting slot is disposed on a side of the second subsection away from the second flow path.
8. The volute assembly of claim 5, wherein the impeller comprises a first impeller portion rotatably disposed within the first chamber and a second impeller portion rotatably disposed within the second chamber, the second impeller portion having a number of vanes less than the number of deflectors.
9. The volute assembly of claim 8, wherein the number of flow guides and the number of vanes of the second impeller portion are non-integral.
10. An air compressor machine, its characterized in that includes:
a housing;
the rotating shaft is rotatably arranged in the shell;
a volute assembly according to any of claims 1-9, wherein the shaft is connected to an impeller of the volute assembly so that the shaft rotates the impeller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210255797.4A CN114526262B (en) | 2022-03-15 | 2022-03-15 | Volute component and air compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210255797.4A CN114526262B (en) | 2022-03-15 | 2022-03-15 | Volute component and air compressor |
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| CN114526262A true CN114526262A (en) | 2022-05-24 |
| CN114526262B CN114526262B (en) | 2024-07-09 |
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Cited By (1)
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| CN115573927A (en) * | 2022-10-14 | 2023-01-06 | 势加透博(成都)科技有限公司 | Integrated multi-stage compressor and compressor unit |
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| GB1401486A (en) * | 1971-11-26 | 1975-07-16 | Wallace Murray Corp | Centrifugal compressors especially for supercharging engines |
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| CN114526262B (en) | 2024-07-09 |
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