CN209956202U - High-specific-speed water jet propulsion pump hydraulic model structure - Google Patents
High-specific-speed water jet propulsion pump hydraulic model structure Download PDFInfo
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- CN209956202U CN209956202U CN201920587448.6U CN201920587448U CN209956202U CN 209956202 U CN209956202 U CN 209956202U CN 201920587448 U CN201920587448 U CN 201920587448U CN 209956202 U CN209956202 U CN 209956202U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 230000004323 axial length Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
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Abstract
A hydraulic model structure of a high-specific-speed water jet propulsion pump belongs to the technical field of vane pumps. The hydraulic model structure of the water jet propulsion pump comprises a water inlet flow guide body, an impeller and a guide wheel, wherein a flow guide cone is arranged in a flow channel of the water inlet flow guide body, blades are arranged in flow channels of the impeller and the guide wheel, the flow channel of the water inlet flow guide body, the flow channel of the impeller and the flow channel of the guide wheel are sequentially communicated, and the water inlet flow guide body, the impeller and the guide wheel have good adaptability. The model structure has the hydraulic performance of high efficiency, high specific speed and high thrust under the limitation of specific structural form and size. Dynamic and static interference effects can be effectively reduced, and distorted flow fields such as vortex and cavitation are avoided; the front edge of a diversion cone of the water inlet diversion body is processed by adopting an arc structure, so that the water can be efficiently drained, the local vortex flow can be weakened, and the tail edge flow separation can be avoided by processing the sharp angle of the tail edge of the diversion cone; the front edge of the impeller blade protrudes forwards, so that the cavitation cloud of the front edge of the blade is blocked, and the local flow is improved.
Description
Technical Field
The utility model relates to a high specific speed water jet propulsion pump hydraulic model structure belongs to impeller pump technical field.
Background
The water jet propulsion pump is a novel underwater propulsion mode, and utilizes the reaction force of water flow jetted by the propulsion pump to propel the underwater vehicle to advance. With the increasing appeal of high-end aircrafts to the high-speed and high-thrust water jet propulsion pump, in order to break through monopoly and technical blockade of foreign products, effective hydraulic design and research and development of the high-speed and high-thrust water jet propulsion pump are necessary.
Generally, the performance of the water jet propulsion pump is comprehensively measured by using a non-dimensionalized cavitation specific rotating speed, that is, the higher the rotating speed is, the higher the thrust is, the higher the cavitation specific rotating speed of the water jet propulsion pump is, and conversely, the lower the cavitation specific rotating speed is. Generally, 1300 cavitation specific rotating speed is used as a continuous operation limiting line of the water jet propulsion pump. Most of the prior publications have the cavitation speed ratio of the jet propulsion pump lower than 1300, and the jet propulsion pump with the cavitation speed ratio higher than 1300 is rare.
Unlike the structure of the water jet propulsion pump with low cavitation specific rotating speed, the avoidance of cavitation and vortex distortion is the biggest challenge in the design of the water jet propulsion pump with high specific rotating speed. In the structural design of the water jet propulsion pump, for given design parameters, how to implement the development of the structure of the water jet propulsion pump under multiple constraints still faces huge challenges.
Therefore, a high-specific-speed water propulsion pump hydraulic model structure with high rotating speed and high thrust under multi-source constraint conditions is urgently needed.
Disclosure of Invention
In order to solve the problem that above-mentioned high specific speed water propulsion pump hydraulic design exists, the utility model provides a high specific speed water propulsion pump hydraulic model structure, this structure should have the hydraulic performance of high efficiency, high specific speed, high thrust under the injecing of concrete structural style and size.
The utility model adopts the technical proposal that: a high specific speed water jet propulsion pump hydraulic model structure comprises a guide cone type water inlet guide body, a guide wheel type impeller and an axial flow type guide wheel, wherein six guide cones which are uniformly distributed in the circumferential direction of a central axis are arranged in a flow passage of the water inlet guide body, two impeller blades which are uniformly distributed in the circumferential direction of the central axis are arranged in the flow passage of the impeller, and five guide wheel blades which are uniformly distributed in the circumferential direction of the central axis are arranged in the flow passage of the guide wheel; the flow channel of the water inlet guide body, the flow channel of the impeller and the flow channel of the guide wheel are communicated in sequence; the impellers of the two impeller blades are matched with the water inlet guide bodies of the six guide cones and the guide wheels of the five guide wheel blades.
The water inlet flow guide body adopts a fixed structure, a hole through which the rotating shaft penetrates is formed in the central axis of the water inlet flow guide body, and the axial length of the water inlet flow guide body is L1The width of the inlet of the flow channel is b1The diameter of the inlet of the flow passage is d0The diameter of the rotating shaft is d1(ii) a The runner molded line of the water inlet flow guide body comprises three sections of arc line sections, and the radiuses of the arcs are R in sequence1，R2，R3(ii) a The whole diversion cone is of a tapered structure, the front edge of the diversion cone is of an arc structure, and the arc radiuses of the blade root and the blade top of the front edge are r in sequence1，r2The tail edge of the flow guide cone is of a sharp-angled structure, and the corresponding angles of the root and the top of the tail edge are A in sequence1，A2(ii) a Wherein L is1=280~320 mm，b1=110~130 mm，d0=420~480 mm，d1=45~55 mm，R1=45~55 mm，R2=45~55 mm，R3=45~55 mm，r1=4~8 mm，r2=3~7mm，A1=13~22°，A2=11~20°。
The impeller adopts a rotating structure fixedly connected with a rotating shaft at the central axis, and the axial length of the impeller is L2Inlet width of b2The diameter of the wheel disk is d2The outer diameter of the impeller is d3(ii) a The front edge of the impeller blade is protruded forwards with a protrusion length of T1The water outlet edge of the impeller blade is a straight line; the side wrap angle of the rear cover plate of the impeller blade is B1The wrap angle of the front cover plate side of the impeller blade is B2(ii) a Wherein L is2=80~90 mm，b2=30~50 mm，d2=90~110 mm，d3=180~230 mm，T1=4~8 mm，B1=150~180°，B2=130~160°。
The guide wheel adopts a fixed structure, a hole through which the rotating shaft passes is formed in the central axis of the guide wheel, and the axial length of the guide wheel is L3Outlet width of b3The diameter of the outlet wheel disc is d4(ii) a The water inlet edge of the guide wheel blade and the water outlet edge of the guide wheel blade are both straight lines; the wrap angle of the rear cover plate side of the guide wheel blade is C1The wrap angle of the front cover plate side of the guide wheel blade is C2(ii) a Wherein L is3=50~60 mm，b3=15~23 mm，d4=8~13 mm，C1=90~102°，C2=35~50°。
The utility model has the advantages that: the hydraulic model structure of the high-specific-speed water jet propulsion pump comprises a water inlet flow guide body, an impeller and a guide wheel, wherein a flow channel of the water inlet flow guide body is internally provided with a flow guide cone, the flow channels of the impeller and the guide wheel are internally provided with blades, the flow channel of the water inlet flow guide body, the flow channel of the impeller and the flow channel of the guide wheel are sequentially communicated, and the water inlet flow guide body, the impeller and the guide wheel have good adaptability, so that the dynamic and static interference effect can be effectively reduced, and the distortion flow fields such as vortex, cavitation and the; the front edge of a diversion cone of the water inlet diversion body is processed by adopting an arc structure, so that the water can be efficiently drained, the local vortex flow can be weakened, and the tail edge flow separation can be avoided by processing the sharp angle of the tail edge of the diversion cone; the front edge of the impeller blade protrudes forwards, so that the cavitation cloud of the front edge of the blade is blocked, and the local flow is improved.
Drawings
FIG. 1 is a sectional view of a hydraulic model structure of a high specific speed water jet propulsion pump.
FIG. 2 is a three-dimensional diagram of a hydraulic model structure of a high specific speed water jet propulsion pump.
Fig. 3 is a three-dimensional view of a flow cone of an influent flow conductor.
Fig. 4 is a three-dimensional view of an impeller blade.
Fig. 5 is a three-dimensional view of a stator blade.
In the figure: 1. the water inlet guide body comprises a water inlet guide body 2, a guide cone 2a, a guide cone front edge 2b, a guide cone tail edge 3, an impeller blade 3a, an impeller blade front edge 3b, an impeller blade front cover plate side 3c, an impeller blade rear cover plate side 3d, an impeller blade water outlet edge 4, a guide wheel blade 4a, a guide wheel blade water inlet edge 4b, a guide wheel blade rear cover plate side 4c, a guide wheel blade front cover plate side 4d, a guide wheel blade water outlet edge 5, a guide wheel 6, a pump spray outlet 7, an impeller 8, a pump spray inlet 9 and a central axis.
Detailed Description
Fig. 1 and 2 show a structural schematic diagram of a hydraulic model structure of a high specific speed water jet propulsion pump. In the figure: the hydraulic model structure of the high specific speed water jet propulsion pump comprises a guide cone type water inlet guide body 1, a guide wheel type impeller 7 (the impeller is a closed structure in the figure) and an axial flow type guide wheel 5. Six guide cones 2 which are uniformly distributed in the circumferential direction of the central axis 9 are arranged in a flow passage of the water inlet guide body 1, two impeller blades 3 which are uniformly distributed in the circumferential direction of the central axis 9 are arranged in a flow passage of the impeller 7, and five guide wheel blades 4 which are uniformly distributed in the circumferential direction of the central axis 9 are arranged in a flow passage of the guide wheel 5. The flow channel of the water inlet guide body 1, the flow channel of the impeller 7 and the flow channel of the guide wheel 5 are communicated in sequence. The impellers 7 of the two impeller blades 3 are matched with the water inlet flow guide body 1 of the six flow guide cones 2 and the guide wheels 5 of the five guide wheel blades 4.
The water inlet flow guide body 1 adopts a fixed structure, and a hole through which a rotating shaft passes is arranged at the central axis 9 of the water inlet flow guide body 1; the impeller 7 adopts a rotating structure fixedly connected with a rotating shaft on the central axis 9, the guide wheel 5 adopts a fixed structure, and a hole through which the rotating shaft passes is arranged on the central axis 9 of the guide wheel 5.
Fig. 2 and 3 show three-dimensional views of a flow cone of an influent flow conductor. Defining specific design values of the water inflow guide body and the guide cone and implementing geometric modeling: the axial length of the water inlet flow guide body 1 is L1The width of the inlet of the flow channel is b1The diameter of the inlet of the flow passage is d0The diameter of the rotating shaft is d1(ii) a The runner line of the water inlet flow guiding body 1 comprises three sections of circular arc line sections, and the radiuses of the circular arcs are R in sequence1，R2，R3(ii) a The whole diversion cone 2 is of a tapered structure, the leading edge 2a of the diversion cone is of an arc structure, and the arc radiuses of the root of the leading edge and the top of the blade are r in sequence1，r2The tail edge 2b of the flow guide cone is of a sharp-angled structure, and the corresponding angles of the root and the top of the tail edge are A in sequence1，A2(ii) a Wherein L is1=300 m，b1=125 mm，d0=45 m，d1=50 m，R1=200 m，R2=200 m，R3=200 mm，r1=6 mm，r2=4 mm，A1=18°，A2=15 °; the whole diversion cone 2 has a gradually-reduced variation trend.
Fig. 2 and 4 show three-dimensional views of the impeller blades. Defining specific design values of the impeller and implementing geometric modeling: the axial length of the impeller 7 is L2Inlet width of b2Diameter d2The outer diameter of the impeller is d3(ii) a The front edge 3a of the impeller blade is protruded forwards with the length of T1The water outlet edge 3d of the impeller blade is a straight line; the wrap angle of the side 3B of the back cover plate of the impeller blade is B1The 3c wrap angle of the front cover plate side of the impeller blade is B2(ii) a Wherein L is2=88 mm，b2=40 mm，d2=100 mm，d3=210 mm，T1=5 mm，B2=161，B1=175°。
Fig. 2 and 5 show three-dimensional views of the stator blade. Defining specific design values of the guide wheel and implementing geometric modeling: the axial length of the guide wheel 5 is L3Outlet width of b3The diameter of the outlet wheel disc is d4(ii) a The guide wheel blade water inlet edge 4a and the guide wheel blade water outlet edge 4d of the guide wheel blade 4 are both straight lines; guide of guide wheel blade 4Wrap angle C of rear cover plate side 4b of wheel blade1=96 degrees, leading wheel blade front cover plate side 4C wrap angle C2=43 °; wherein L is3=57 mm，b3=16.5 mm，d4=100 m；C1=96°，C2=43°。
The water inflow guide body 1, the impeller 7 and the guide wheel 5 which are determined under the specific size are assembled according to the figures 1 and 2, and are verified by calculation of computational fluid dynamics software, and the calculation performance indexes after considering the cavitation effect are as follows: the specific rotating speed is 1600, the thrust is 8020N, the pump spraying efficiency is 70.8 percent, and the pump spraying power is 487 KW. The hydraulic design of the high-specific-speed water jet propulsion pump can be referenced.
The above description is further detailed in connection with the preferred embodiments of the present invention, and it is not intended that the specific embodiments of the present invention be limited to these descriptions. To the utility model belongs to the technical field of the ordinary technical personnel, do not deviate from the utility model discloses a under the prerequisite of the design, can also make simple deduction and replacement, all should regard as the utility model discloses a protection scope.
Claims (4)
1. The utility model provides a high specific speed water jet propulsion pump water conservancy model structure, includes the water inlet baffle (1) of water conservancy diversion awl formula, induces wheeled impeller (7) and axial-flow type guide pulley (5), its characterized in that: six guide cones (2) which are uniformly distributed in the circumferential direction of the central axis (9) are arranged in a flow passage of the water inlet guide body (1), two impeller blades (3) which are uniformly distributed in the circumferential direction of the central axis (9) are arranged in a flow passage of the impeller (7), and five guide wheel blades (4) which are uniformly distributed in the circumferential direction of the central axis (9) are arranged in a flow passage of the guide wheel (5); the flow channel of the water inlet guide body (1), the flow channel of the impeller (7) and the flow channel of the guide wheel (5) are communicated in sequence; the impellers (7) of the two impeller blades (3) are matched with the water inlet flow guide bodies (1) of the six flow guide cones (2) and the guide wheels (5) of the five guide wheel blades (4).
2. The hydraulic power of high specific speed water jet propulsion pump according to claim 1Model structure, its characterized in that: the water inlet flow guide body (1) adopts a fixed structure, a hole through which a rotating shaft penetrates is formed in the position of the central axis (9) of the water inlet flow guide body (1), and the axial length of the water inlet flow guide body (1) is L1The width of the inlet of the flow channel is b1The diameter of the inlet of the flow passage is d0The diameter of the rotating shaft is d1(ii) a The runner molded line of the water inlet flow guide body (1) comprises three sections of arc line sections, and the radiuses of the arcs are R in sequence1，R2，R3(ii) a The whole diversion cone (2) is of a tapered structure, the leading edge (2 a) of the diversion cone is of an arc structure, and the arc radiuses of the root of the leading edge and the top of the blade are r in sequence1，r2The tail edge (2 b) of the flow guide cone is of a sharp-angled structure, and the corresponding angles of the root and the top of the tail edge are A in sequence1，A2(ii) a Wherein L is1=280~320 mm，b1=110~130 mm，d0=420~480 mm，d1=45~55 mm，R1=45~55 mm，R2=45~55 mm，R3=45~55 mm，r1=4~8 mm，r2=3~7 mm，A1=13~22°，A2=11~20°。
3. The hydraulic model structure of the high specific speed water jet propulsion pump according to claim 1, wherein: the impeller (7) adopts a rotating structure fixedly connected with a rotating shaft at the central axis (9), and the axial length of the impeller (7) is L2Inlet width of b2Diameter d2The outer diameter of the impeller is d3(ii) a The front edge (3 a) of the impeller blade protrudes forwards with the protruding length of T1The water outlet edge (3 d) of the impeller blade is a straight line; the wrap angle of the rear cover plate side (3B) of the impeller blade is B1The wrap angle of the front cover plate side (3 c) of the impeller blade is B2(ii) a Wherein L is2=80~90 mm，b2=30~50 mm， d2=90~110 mm，d3=180~230 mm，T1=4~8 mm，B1=150~180°，B2=130~160°。
4. The hydraulic model structure of the high specific speed water jet propulsion pump according to claim 1, wherein: what is needed isThe guide wheel (5) adopts a fixed structure, a hole through which a rotating shaft passes is arranged at the central axis (9) of the guide wheel (5), and the axial length of the guide wheel (5) is L3Outlet width of b3The diameter of the outlet wheel disc is d4(ii) a The guide wheel blade water inlet edge (4 a) and the guide wheel blade water outlet edge (4 d) of the guide wheel blade (4) are both straight lines; the wrap angle of the guide wheel blade rear cover plate side (4 b) of the guide wheel blade (4) is C1The wrap angle of the front cover plate side (4C) of the guide wheel blade is C2(ii) a Wherein L is3=50~60 mm，b3=15~23 mm，d4=8~13 mm，C1=90~102°，C2=35~50°。
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| CN110053748A (en) * | 2019-06-10 | 2019-07-26 | 大连理工大学 | A kind of higher specific speed water jet propulsion pump hydraulic model structure |
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| CN110053748A (en) * | 2019-06-10 | 2019-07-26 | 大连理工大学 | A kind of higher specific speed water jet propulsion pump hydraulic model structure |
| CN110053748B (en) * | 2019-06-10 | 2023-12-15 | 大连理工大学 | Hydraulic model structure of high-specific-speed water jet propulsion pump |
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