CN113148089A - Punching press formula water conservancy propulsion pump based on gaseous pressure boost - Google Patents
Punching press formula water conservancy propulsion pump based on gaseous pressure boost Download PDFInfo
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- CN113148089A CN113148089A CN202110382336.9A CN202110382336A CN113148089A CN 113148089 A CN113148089 A CN 113148089A CN 202110382336 A CN202110382336 A CN 202110382336A CN 113148089 A CN113148089 A CN 113148089A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H11/00—Marine propulsion by water jets
- B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
- B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps
- B63H11/08—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H11/00—Marine propulsion by water jets
- B63H11/12—Marine propulsion by water jets the propulsive medium being steam or other gas
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Abstract
The invention discloses a stamping type hydraulic propulsion pump based on gas pressurization, which comprises a vane pump and a plurality of gas injection channels, wherein the vane pump comprises a pump shell, a pump shaft and a driving impeller, the pump shaft and the driving impeller are both arranged in the pump shell and can rotate in the pump shell, the pump shell comprises a first section and a second section which are sequentially arranged in the axial direction of the pump shell, the driving impeller is positioned in the first section, the inner peripheral wall of the second section is provided with a plurality of vanes for guiding the flow direction of propulsion liquid, and the vanes are arranged at intervals along the circumferential direction of the second section; the plurality of air injection channels are arranged at intervals along the circumferential direction of the second section, penetrate through the pump shell wall of the second section in the radial direction of the pump shell, and are used for introducing propulsion gas into the second section. The ram hydraulic propulsion pump based on gas pressurization can generate larger thrust and can meet the requirement of higher speed.
Description
Technical Field
The invention relates to the technical field of ship propellers, in particular to a stamping type hydraulic propulsion pump based on gas pressurization.
Background
The ocean is an important barrier for national safety, and the ocean safety concerns the overall safety and strategic layout of the country. The hydraulic propulsion is an advanced technology with high propulsion efficiency, excellent operation performance and strong anti-cavitation capability. The traditional hydraulic propulsion technology mainly pushes a ship to advance by the reaction force of high-speed water flow generated by a propulsion pump. However, in the related art, the thrust generated by the propeller pump is limited, and the demand for higher speed cannot be satisfied.
Disclosure of Invention
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 a gas pressurization-based ram hydraulic propulsion pump, which can generate larger thrust and improve the running speed of a ship.
The gas pressurization based ram hydraulic propulsion pump comprises a vane pump and a plurality of gas injection channels, wherein the vane pump comprises a pump shell, a pump shaft and a driving impeller. The pump shaft and the driving impeller are both arranged in the pump shell and can rotate in the pump shell, the pump shell comprises a first section and a second section which are sequentially arranged in the axial direction of the pump shell, the driving impeller is positioned in the first section, the inner peripheral wall of the second section is provided with a plurality of blades for guiding the flow direction of propelling liquid, and the plurality of blades are arranged at intervals along the circumferential direction of the second section; the plurality of air injection channels are arranged at intervals along the circumferential direction of the second section, penetrate through the pump shell wall of the second section in the radial direction of the pump shell, and are used for introducing propulsion gas into the second section.
In some embodiments, the vane has a pressure side facing away from the first section, the outlet of the gas injection channel is provided on the inner circumferential wall of the second section, the outlet of the gas injection channel is provided on a side of the vane facing away from the first section, and the outlet of the gas injection channel is provided at a position close to the pressure side.
In some embodiments, the mixing tube further comprises a second section disposed between the first section and the mixing tube, the mixing tube in sealed communication with the second section, the mixing tube for blending the propellant gas and the propellant liquid, and the mixing tube having a flow cross-section that tapers in a direction from the second section to the mixing tube.
In some embodiments, the mixing tube has a length dimension no less than three times the tube diameter of the second section.
In some embodiments, the outer peripheral side of the second section is provided with a plurality of gas injection pipes, the plurality of gas injection pipes are arranged at intervals along the circumferential direction of the second section, the plurality of gas injection pipes correspond to the plurality of blades one by one, the gas injection channels are formed in the gas injection pipes, the joints of the blades and the second section form a blade tip bone line, and the tangent of at least part of the blade tip bone line is arranged in parallel with the tangent of the central axis of the gas injection pipe.
In some embodiments, the gas lance is a circular tube, the cross section of the second segment is circular, the central axis of the gas lance intersects with the outer peripheral surface of the second segment at a point a, the cross section of the second segment that defines the point a is a first plane, the central axis of the first plane intersects with the central axis of the second segment at a point B, the point B is used as an origin, a three-dimensional rectangular coordinate system is made with any two perpendicular straight lines in the first plane as an X axis and a Y axis, and the central axis of the second segment as a Z axis, and in the three-dimensional rectangular coordinate system, the central axis of the gas lance satisfies the following formula:
in the formula: theta0Is an included angle formed by the connecting line of the point A and the point B and the X axis;
r is the radius of the second section;
theta is an included angle formed by a connecting line of a projection point of any point C on the central axis of the gas ejector tube on the first plane and the point B and the X axis;
r (theta) is the distance between the projection point of any point C on the central axis of the gas lance on the first plane and the point B;
and defining a plane which is parallel to the tangent line of any point C on the central axis of the gas ejector pipe and passes through the Z axis as a second plane, wherein beta is the included angle between the projection line of the tangent line of any point C on the central axis of the gas ejector pipe on the second plane and the first plane.
In some embodiments, the outlet of the air injection channel is positioned near the midpoint of the pinna bone line.
In some embodiments, the cross-section of the gas injection channel and the cross-section of the second section are both circular, and the diameter of the gas injection channel is 0.05 to 0.1 times the diameter of the second section.
In some embodiments, the pump further comprises a sleeve, at least a portion of the sleeve is disposed in the second section, the plurality of vanes are disposed on an outer peripheral side of the sleeve, inner ends of the plurality of vanes are connected to an outer peripheral wall of the sleeve, at least a portion of the pump shaft is rotatably fitted in the sleeve, and a cross section of the sleeve is gradually reduced in a direction from the second section to the mixing tube.
In some embodiments, the gas supply device is further included, the gas injection channel is communicated with the gas supply device, and the gas supply device is a high-pressure gas tank or a steam turbine drum or a gas turbine combustor.
Drawings
Fig. 1 is a schematic perspective view of a ram hydraulic propulsion pump based on gas pressurization according to an embodiment of the present invention.
FIG. 2 is a schematic side view of a ram hydraulic propel pump based on gas pressurization according to an embodiment of the present disclosure.
Fig. 3 is a schematic view of a drive impeller and blades according to an embodiment of the present invention.
FIG. 4 is a second, right side elevational view of an embodiment in accordance with the invention.
Fig. 5 is a schematic half-section view of a ram hydraulic propulsion pump based on gas pressurization according to an embodiment of the invention.
FIG. 6 is a cloud of water pressure distributions around the blades in the second stage according to an embodiment of the present invention.
FIG. 7 is a cloud of water velocity profiles around the blades in the second section according to an embodiment of the invention.
Reference numerals:
a pump housing 1; a first section 11; a second section 12; a gas lance 120; a blade 121; a first side edge 1210; a sleeve 122; a mixing pipe 13; a rotating shaft 2; a drive impeller 3; a first plane 4.
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.
As shown in fig. 1 and 2, the ram-type hydraulic propulsion pump based on gas pressurization according to the embodiment of the invention comprises a vane pump and a plurality of gas injection channels. The vane pump comprises a pump shell 1, a pump shaft 2 and a driving impeller 3, wherein the pump shaft 2 and the driving impeller 3 are both arranged in the pump shell 1 and can rotate in the pump shell 1, the pump shell 1 comprises a first section 11 and a second section 12 which are sequentially arranged in the axial direction of the pump shell, the driving impeller 3 is positioned in the first section 11, a plurality of vanes 121 for guiding the flow direction of propelling liquid are arranged on the inner peripheral wall of the second section 12, and the plurality of vanes 121 are arranged at intervals along the circumferential direction of the second section 12; the plurality of air injection channels are arranged at intervals along the circumferential direction of the second section 12, penetrate through the pump casing wall of the second section 12 in the radial direction of the pump casing 1, and are used for introducing propulsion gas into the second section 12.
As shown in fig. 1 to 7, the ram-type hydraulic propulsion pump based on gas pressurization includes a vane pump and a plurality of gas injection passages. The vane pump comprises a pump shell 1, a pump shaft 2, a driving impeller 3 and vanes 121. A pump shaft 2 is arranged in the pump shell 1, and the driving impeller 3 is in rotation stopping connection with the pump shaft 2.
It should be noted that the other end of the pump shaft 2 is connected with a motor, and the motor can be arranged at the left end or the right end of the pump shell 1 according to different working conditions. The driving impeller 3 rotates along with the pump shaft 2, introduces outside water flow into the pump shell 1, and converts mechanical energy of the motor into kinetic energy and pressure energy of the water flow.
The first section 11 is located on the left side of the pump housing 1 and the second section 12 is located on the right side of the pump housing 1, the drive impeller 3 being mounted in the first section 11.
It should be noted that, the left end of the first section 11 is provided with an opening, the opening is communicated with the outside water area, and water flows into the ram hydraulic propulsion pump through the opening and is conveyed to the next stage pipeline under the action of the driving impeller 3.
A plurality of blades 121 are arranged on the inner wall of the second section 12, and the blade tip of each blade 121 is fixedly connected with the inner wall of the second section 12 and is arranged at intervals along the circumferential direction in the second section 12.
It should be noted that the vanes 121 are installed on the right side of the driving impeller 3 and each vane 121 has a certain curvature. The plurality of blades 121 arranged along the circumferential direction collect the water flow introduced by the driving impeller 3 and uniformly introduce the water flow into the next-stage pipeline. In the process, the flow rate of the water stream is reduced due to the stop of the blades 121, and at the same time, the blades 121 convert part of the kinetic energy of the water stream into pressure energy of the water stream.
In the circumferential direction of the second section 12, a plurality of air injection passages are provided at intervals. The gas injection channel penetrates through the pipe wall of the second section 12 and is communicated with the interior of the second section 12, and the gas injection channel is used for introducing high-pressure gas into water flow in the second section 12.
It will be appreciated that in other embodiments, the air injection passages may be provided within the wall of the second section 12 when the wall is thicker.
According to the gas pressurization based ram hydraulic propulsion pump disclosed by the embodiment of the invention, the gas injection channel is additionally arranged on the second section 12, high-pressure gas is introduced into the gas pressurization based ram hydraulic propulsion pump, and the gas-liquid two-phase propulsion is utilized, so that larger thrust can be generated, and the sailing speed of a ship is increased.
In some embodiments, the vane 121 has a pressure side facing away from the first section 11, the outlet of the air injection channel is provided on the inner circumferential wall of the second section 12, the outlet of the air injection channel is provided at a side of the vane 121 facing away from the first section 11, and the outlet of the air injection channel is provided at a position close to the pressure side.
As shown in fig. 2 and 3, the vane 121 has two sides, and the side facing away from the first section 11 is a pressure side, which is a high pressure region when the ram hydraulic propulsion pump based on gas pressurization operates under a design condition. The outlet of the air injection channel is located on the inner peripheral wall of the second section 12 on the side of the vane 121 facing away from the first section 11 and communicates with the inside of the second section 12.
Preferably, the outlet of the air injection channel is provided at the pressure side of the vane 121. Because the pressure side is the high pressure district during operation, the bubble that the high-pressure gas that lets in formed in aqueous here can not expand and do work, and along with high-pressure gas outflow second section 12, the pressure on second section 12 right side is less, and high-pressure gas can expand and do work, has played the effect of reinforcing thrust.
In some embodiments, a mixing tube 13 is further included, the second section 12 being disposed between the first section 11 and the mixing tube 13, the mixing tube 13 being in sealed communication with the second section 12, the mixing tube 13 being for blending the propellant gas and the propellant liquid, and the flow cross-section of the mixing tube 13 tapering in a direction from the second section 12 to the mixing tube 13.
As shown in fig. 1 to 3, a mixing pipe 13 is further provided at the right end of the pump housing 1. The second section 12 is hermetically communicated between the mixing pipe 13 and the first section 11, the mixing pipe 13 and the second section 12, bubbles formed by high-pressure gas are carried in water flow flowing through the second section 12, and the water flow and the high-pressure gas are fully mixed together after reaching the mixing pipe 13.
Preferably, the joint of the second section 12 and the mixing pipe 13 can be connected by a flange, and a sealing gasket is used for realizing sealing connection, so that the leakage of high-pressure gas and propulsion water flow is prevented, and the propulsion speed is prevented from being influenced.
It should be noted that the second section 12 and the first section 11 are also connected by flanges in a sealing manner.
As shown in fig. 5, the cross section of the mixing pipe 13 is gradually reduced along the direction from the second section 12 to the mixing pipe 13, and the water flow is accelerated by the larger inlet and the smaller outlet. According to the Bernoulli principle, the pressure in the liquid is reduced, and the high-pressure gas in the bubbles can expand to do work on the liquid, so that the flow rate of the liquid is accelerated, and the thrust is improved.
As shown in fig. 5, the central axis of the mixing pipe 13 is a straight line, the water flow and the high-pressure bubbles are ejected from the outlet at the right end of the mixing pipe 13, and the motor is located at the right end of the ram hydraulic propulsion pump based on gas pressurization.
It will be appreciated that in other embodiments, the central axis of the mixing tube 13 is curved, and the right end outlet of the mixing tube 13 may face downward. The pump shaft 2 penetrates out of the right side edge of the mixing pipe 13 and is in transmission connection with a motor, and the motor is positioned outside the mixing pipe 13 and inside a ship.
In some embodiments, the length dimension of the mixing tube 13 is no less than three times the tube diameter of the second section 12.
As shown in fig. 5, the length L of the mixing tube 13 in the axial direction is three or more times the tube diameter length 2R of the second section 12, so that the propelling liquid and the propelling gas are sufficiently mixed in the mixing tube 13, and the propelling gas is sufficiently expanded, thereby achieving the best propelling effect. The diameter of the mixing tube 13 is determined according to the actual flow rate, and the material of the mixing tube 13 is stainless steel.
In some embodiments, the outer peripheral side of the second section 12 is provided with a plurality of gas injection pipes 120, the plurality of gas injection pipes 120 are arranged at intervals along the circumferential direction of the second section 12, the plurality of gas injection pipes 120 correspond to the plurality of blades 121 one to one, gas injection channels are formed in the gas injection pipes 120, a blade tip bone line is formed at the joint of the blades 121 and the second section 12, and a tangent line of at least a part of the blade tip bone line is arranged in parallel with a tangent line of the central axis of the gas injection pipe 120.
As shown in fig. 3, the outer circumference of the second section 12 is provided with a plurality of gas lances 120, the plurality of gas lances 120 being arranged at intervals along the circumferential direction of the second tube, the number of the gas lances 120 corresponding to the number of the blades 121. The gas injection pipe 120 has a hollow space therein to form a gas injection passage. As shown in FIG. 2, the tip of blade 121 is fixedly attached to the inner wall of second section 12 to form the tip bone line of blade 121.
It should be noted that the shape of the blade tip bone line is designed according to the actual design requirements and the design principle of the water pump.
The tangent line of each blade 121 close to the blade vertex bone line of the first section 11 is parallel to the tangent line of the central axis of the gas injection pipe 120 near the blade 121, so that the direction of the introduced high-pressure gas flow is consistent with that of the water flow introduced by the blade 121, and the condition that the flow channel is disordered due to the fact that the flowing directions of the high-pressure gas flow and the water flow are inconsistent is avoided.
In the present embodiment, the gas nozzles 120 are welded to the second section 12, and the number of the gas nozzles 120 is 6.
It is understood that in other embodiments, the number of the gas lances 120 and the blades 121 may be designed to be 5-8, etc. as required by the operating conditions.
In some embodiments, the gas lance 120 is a circular tube, the cross section of the second section 12 is circular, the central axis of the gas lance 120 intersects with the outer peripheral surface of the second section 12 at a point a, the cross section of the second section 12 that defines the point a is a first plane 4, the central axes of the first plane 4 and the second section 12 intersect at a point B, the point B is used as an origin, a three-dimensional rectangular coordinate system is made by taking any two perpendicular straight lines in the first plane 4 as an X axis and a Y axis, and the central axis of the second section 12 as a Z axis, and in the three-dimensional rectangular coordinate system, the central axis of the gas lance 120 satisfies the following formula:
in the formula: theta0Is an included angle formed by the connecting line of the point A and the point B and the X axis;
r is the radius of the second section 12;
theta is an included angle formed by a connecting line of a projection point of any point C on the central axis of the gas lance 120 on the first plane 4 and a point B and the X axis;
r (θ) is the distance between the projection point of an arbitrary point C on the central axis of the gas lance 120 on the first plane 4 and the point B;
a plane parallel to the tangent of any point C on the central axis of the gas lance 120 and passing through the Z-axis is defined as the second plane, and β is the angle between the projection line of the tangent of any point C on the central axis of the gas lance 120 on the second plane and the first plane 4.
As shown in fig. 2 to 4, the gas lance 120 is circular in cross-section and the second section 12 is also circular in cross-section. The central axis of the gas ejector 120 intersects with the outer peripheral surface of the second section 12 at a point A, the cross section of the passing point A of the second section 12 is defined as a first plane 4, the central axes of the first plane 4 and the second section 12 intersect at a point B, the point B is a coordinate origin, the side edge of any one blade 121 close to the first section 11 is a first side edge 1210, the straight line of the projection line of the first side edge 1210 on the first plane 4 is a Y axis, and the central axis of the second section 12 is a Z axis to establish a three-dimensional rectangular coordinate system.
The positive direction of the Z-axis is the direction from the first stage 11 to the mixing stage, and the positive directions of the Y-axis and the X-axis are shown in fig. 4. In the three-dimensional cylindrical coordinate system, the central axis of the gas lance 120 satisfies the following formula:
in the formula: theta0The included angle formed by the connecting line of the point A and the point B and the positive direction of the X axis;
r is the radius of the second section 12; theta is an included angle formed by the connecting line of the projection point of any point C on the central axis of the gas lance 120 on the first plane 4 and the point B and the positive direction of the X axis;
r (θ) is the distance between the projection point of an arbitrary point C on the central axis of the gas lance 120 on the first plane 4 and the point B;
z (θ) is the distance from any point C on the central axis of the gas lance 120 to the first plane 4.
A plane parallel to the tangent of any point C on the central axis of the gas lance 120 and passing through the Z axis is defined as a second plane, the second plane is constantly changed according to the motion of the point C, and beta is an included angle between the projection line of the tangent of any point C on the central axis of the gas lance 120 on the second plane and the first plane 4. As shown in fig. 2 and 4, the angle β formed by the plane formed by the line connecting point a and point B and the central axis of the gas lance 120 with respect to the first plane 4 is given.
As shown in fig. 2, the acute angle formed by the blade vertex bone line of the blade 121 close to the first section 11 and the joint surface of the first section 11 and the second section 12 is equal to β, in order to ensure that the flowing direction of the introduced gas and the liquid at the same position is consistent, and to avoid water flow disorder.
In some embodiments, the included angle θ does not exceed 5 π/9.
As shown in FIG. 4, the size of the included angle θ determines the axial length of the gas lance 120, and the spatial curve formed by the centers of the cross sections of the gas lance 120 extends upstream along the axial direction of the gas lance 120, and the included angle θ does not exceed 5 π/9 in order to ensure that the gas lance 120 does not spatially distort excessively and affect the gas flow.
In some embodiments, the outlet of the jet channel is positioned near the mid-point of the pinna bone line.
As shown in fig. 2 and 3, the outlet of the air injection passage is provided near the midpoint of the blade 121 on the apical bone line and on the side of the blade 121 facing away from the first segment 11. As shown in fig. 6, the side of the vane 121 facing away from the first section 11, i.e. the pressure side of the vane 121, is indicated by the arrow in the figure, where the water pressure is the greatest, and the gas introduced through the gas injection channel will not expand sharply, and will not affect the flow direction of the liquid in the second section 12.
Moreover, as shown in fig. 7, the color of the velocity field is single near the blades 121, the water velocity distribution is relatively uniform, and the high-pressure gas introduced through the gas injection channel can continuously advance along the flow direction without being gathered in the second section 12 to cause water flow disorder and influence the propulsion speed.
In some embodiments, the cross-section of the gas injection channel and the cross-section of the second section 12 are both circular, and the diameter of the gas injection channel is 0.05 to 0.1 times the diameter of the second section 12.
As shown in fig. 1 to 5, the air injection passage and the second section 12 are both circular pipes, and the cross-sectional diameter of the air injection passage is 0.05 to 0.1 times the cross-sectional diameter of the second section 12. For example, as shown in fig. 5, the cross-sectional diameter K may be 0.05 times, 0.06 times, 0.07 times, 0.08 times, 0.09 times, 0.1 times, etc. the cross-sectional diameter 2R. It should be noted that the diameter of the gas injection channel should not be too large, so that the gas can be continuously and stably introduced into the second section 12 in a high-pressure state.
In some embodiments, the pump further comprises a sleeve 122, at least a portion of the sleeve 122 is disposed in the second section 12, the plurality of vanes 121 are disposed on an outer circumferential side of the sleeve 122, inner ends of the plurality of vanes 121 are connected to an outer circumferential wall of the sleeve 122, at least a portion of the pump shaft 2 is rotatably fitted in the sleeve 122, and a cross section of the sleeve 122 is gradually reduced in a direction from the second section 12 to the mixing pipe 13.
Inside the second section 12, a sleeve 122 is also provided, as shown in fig. 5. The tips of the blades 121 are connected to the inner wall of the second segment 12, and the other ends are provided on the outer peripheral side of the sleeve 122 and are fixedly connected to the outer peripheral wall of the sleeve 122. In this manner, each vane 121 connects the sleeve 122 and the second section 12 together to form a ring-like structure.
The sleeve 122 has a cavity therein, the pump shaft 2 passes through the cavity, the sleeve 122 is fixed, and the pump shaft 2 can rotate relative to the sleeve 122. The cross section of the sleeve 122 is gradually reduced in the direction from the second section 12 to the mixing pipe 13 in order to increase the water flow passage area of the second section 12, reduce the flow rate and increase the pressure.
The axial length of the sleeve 122 is the same as the axial length of the second section 12, and it will be appreciated that in other embodiments the sleeve 122 may extend a little longer than the axial length of the second section 12 into the mixing tube 13.
It should be noted that the root of the driving impeller 3 is also designed to have a gradually changing cross section, and is matched with the sleeve 122.
In some embodiments, the gas supply device is further included, and the gas injection channel is communicated with the gas supply device, and the gas supply device is a high-pressure gas tank or a steam turbine drum or a gas turbine combustor.
The air injection channel is communicated with a valve of an air supply device on the ship, the on-off of high-pressure air is controlled by controlling the opening and closing of the valve, and the air supply device is a high-pressure air tank.
It should be noted that the gas supply device can also be connected with valves of a steam turbine steam drum and a gas turbine combustion chamber on the ship, and high-pressure waste heat gas generated by the equipment on the ship is utilized to carry out secondary utilization on energy, so that energy is saved.
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 explicitly specifically defined 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 description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. 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 embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A ram-type hydraulic propulsion pump based on gas pressurization is characterized by comprising:
the impeller pump comprises a pump shell, a pump shaft and a driving impeller, wherein the pump shaft and the driving impeller are both arranged in the pump shell and can rotate in the pump shell;
the plurality of air injection channels are arranged at intervals along the circumferential direction of the second section, penetrate through the pump shell wall of the second section in the radial direction of the pump shell, and are used for introducing propulsion gas into the second section.
2. The gas pressurization based ram-type hydraulic propulsion pump according to claim 1, wherein the vane has a pressure side facing away from the first section, the outlet of the gas injection channel is provided on the inner peripheral wall of the second section, the outlet of the gas injection channel is provided on a side of the vane facing away from the first section, and the outlet of the gas injection channel is provided at a position close to the pressure side.
3. The gas pressurization based ram-type hydraulic propulsion pump according to claim 1, further comprising a mixing tube, wherein the second section is disposed between the first section and the mixing tube, the mixing tube is in sealed communication with the second section, the mixing tube is used for mixing the propulsion gas and the propulsion liquid, and the through-flow cross section of the mixing tube is gradually reduced in a direction from the second section to the mixing tube.
4. The ram-type hydraulic propulsion pump based on gas pressurization as recited in claim 3, wherein the length dimension of the mixing tube is not less than three times the tube diameter of the second section.
5. The ram-type hydraulic propulsion pump based on gas pressurization as claimed in claim 4, wherein a plurality of gas injection pipes are arranged on the outer peripheral side of the second section, the plurality of gas injection pipes are arranged at intervals along the circumferential direction of the second section, the plurality of gas injection pipes correspond to the plurality of blades in a one-to-one correspondence manner, the gas injection channels are formed in the gas injection pipes, the blade top bone lines are formed at the joints of the blades and the second section, and the tangent lines of at least part of the blade top bone lines are arranged in parallel with the tangent lines of the central axes of the gas injection pipes.
6. The ram-type hydraulic propulsion pump based on gas pressurization according to claim 5, wherein the gas nozzle is a circular tube, the cross section of the second section is circular, the central axis of the gas nozzle and the outer peripheral surface of the second section intersect at a point A, the cross section of the second section that defines the point A is a first plane, the central axes of the first plane and the second section intersect at a point B, the point B is taken as an origin, a three-dimensional rectangular coordinate system is made by taking any two perpendicular straight lines in the first plane as an X axis and a Y axis, and the central axis of the second section as a Z axis, and in the three-dimensional rectangular coordinate system, the central axis of the gas nozzle satisfies the following formula:
in the formula: theta0Is an included angle formed by the connecting line of the point A and the point B and the X axis;
r is the radius of the second section;
theta is an included angle formed by a connecting line of a projection point of any point C on the central axis of the gas ejector tube on the first plane and the point B and the X axis;
r (theta) is the distance between the projection point of any point C on the central axis of the gas lance on the first plane and the point B;
and defining a plane which is parallel to the tangent line of any point C on the central axis of the gas ejector pipe and passes through the Z axis as a second plane, wherein beta is the included angle between the projection line of the tangent line of any point C on the central axis of the gas ejector pipe on the second plane and the first plane.
7. The ram-type hydraulic propulsion pump based on gas pressurization as claimed in claim 5, wherein the outlet of the gas injection channel is provided at a position close to the midpoint of the blade tip bone line.
8. The gas pressurization based ram-type hydraulic propulsion pump according to claim 1, characterized in that the cross section of the gas injection channel and the cross section of the second section are both circular, and the diameter of the gas injection channel is 0.05-0.1 times the diameter of the second section.
9. The ram-type hydraulic propulsion pump based on gas pressurization as recited in claim 3, further comprising a sleeve, wherein at least a portion of the sleeve is disposed within the second section, the plurality of vanes are disposed on an outer peripheral side of the sleeve, inner ends of the plurality of vanes are connected to an outer peripheral wall of the sleeve, at least a portion of the pump shaft is rotatably fitted within the sleeve, and a cross section of the sleeve is gradually reduced in a direction from the second section to the mixing pipe.
10. The ram-type hydraulic propulsion pump based on gas pressurization according to any one of claims 1 to 9, further comprising a gas supply device, wherein the gas injection channel is communicated with the gas supply device, and the gas supply device is a high-pressure gas tank or a steam turbine drum or a gas turbine combustor.
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| CN113148089B (en) | 2022-07-22 |
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