Water jet propulsion pump with adjustable blade angle

Abstract

The invention provides a water jet propulsion pump with an adjustable blade angle. The water jet propulsion pump comprises a main motor, a fixed guide blade, an outer cover, a blade assembly, an adjustable hub assembly and a flow guide cover. A fixed guide vane is arranged on one side of the outer cover, the main motor is installed at one end of the fixed guide vane, and the main motor is in transmission connection with the adjustable hub assembly. The blade assembly is mounted on a blade base of the adjustable hub assembly, and the blade assembly comprises a driving end for driving blades to rotate; the flow guide cover is mounted at the end part of the adjustable hub; the adjustable hub assembly comprises a mechanism for driving a hub on the periphery of the blade assembly to move in the radial direction, and the mechanism is used for eliminating hub interference in the blade rotating process. Through the design of the overall structure of the hub of the water-jet propulsion pump, when the blade angle is adjusted, the diameter of the hub can be contracted in a matched mode, and the problem that the root of the blade interferes with the hub when the blade rotates is solved.

Description

Technical Field

[0001] The invention relates to the field of fluid machinery, and in particular to a water jet propulsion pump with adjustable blade angles. Background Art

[0002] As a vital power source for submarines, water jet propulsion pumps need to be flexible and maneuverable to effectively cope with various complex operating environments, especially in reverse mode. The traditional reverse mode relies on a reverse bucket to block the high-speed fluid at the outlet of the water jet propulsion pump, forcing the outflow to turn 180 degrees. However, this mode will produce great impact loss, low energy conversion efficiency and poor maneuverability.

[0003] By rotating the axial flow pump blades 180° and reversing the motor, the pump's water inlet will become the water outlet, thus enabling the submarine to go in reverse mode. However, the root line of the axial flow pump blades is an arc shape that fits the cylindrical hub design, which will interfere with the cylindrical hub during rotation, limiting the realization of this function. Figure 5 shown. Summary of the invention

[0004] In view of the shortcomings in the prior art, the present invention provides a water jet propulsion pump with adjustable blade angle. Through the design of the overall structure of the water jet propulsion pump hub, when the blade angle is adjusted, the hub diameter can be contracted to avoid the problem of interference between the blade root and the hub when the blade rotates; when the blade is adjusted into place, the hub diameter can be returned to its original position to ensure the integrity of the flow channel.

[0005] The present invention achieves the above technical objectives through the following technical means.

[0006] A water jet propulsion pump with adjustable blade angle comprises a main motor, fixed guide vanes, an outer cover, a blade assembly, an adjustable hub assembly and a guide cover;

[0007] A fixed guide vane is provided on one side of the outer cover, the main motor is installed at one end of the fixed guide vane, and the main motor is connected to the adjustable hub assembly in a transmission manner; the blade assembly is installed on the blade base of the adjustable hub assembly, and the blade assembly includes a driving end for driving the blade to rotate; the guide cover is installed at the end of the adjustable hub; the adjustable hub assembly includes a mechanism for driving the radial movement of the hub around the blade assembly, which is used to eliminate the interference of the hub during the rotation of the blade.

[0008] Furthermore, the adjustable hub assembly includes a linear slide groove, a fixed outer disk, a blade base, a hub base, an actuator and a movable outer disk; the fixed outer disk and the movable outer disk are alternately distributed circumferentially to form the hub side wall, the hub base is located at the center of the hub side wall, and the hub base is connected to the main motor by transmission; a number of the fixed outer disks are connected to the hub base, and a number of the blade bases are connected to the hub base, one end of the blade base passes through the movable outer disk, and the hub base is provided with linear slide grooves corresponding to the several movable outer disks, one end of each of the movable outer disks is movably installed in a linear slide groove, and the actuator is connected to one end of the movable outer disk, and is used to radially move the movable outer disk by driving the movable outer disk to move in the linear slide groove.

[0009] Furthermore, the actuator includes a driving motor, a gear train, a second gear and a pin; the second gear is supported on a hub base, and the driving motor drives the second gear to rotate through the gear train; an arcuate slide groove opposite to the linear slide groove is provided on the second gear, and the pin passes through the arcuate slide groove and the linear slide groove to be connected to the movable outer disk, and the movable outer disk is moved radially by rotating the second gear.

[0010] Furthermore, the movable outer disk includes a hub surface, a clearance hole and a slide rod; a clearance hole is provided in the center of the hub surface, the clearance hole is clearance-matched with the blade base, a slide rod is provided on one side of the hub surface, the slide rod is located in a linear slide groove, and one end of the slide rod is connected to the actuator.

[0011] Furthermore, before the driving end drives the blade to rotate 180 degrees, the actuator first drives the movable outer disk to contract radially to avoid interference with the movable outer disk during the blade flipping process.

[0012] The beneficial effects of the present invention are:

[0013] 1. The water jet pump with adjustable blade angle described in the present invention has an adjustable hub structure designed through the overall structural design of the water jet pump hub, thereby avoiding the problem of interference between the blades and the hub during rotation, achieving a 180° deflection of the blade angle, and transforming the blade inlet into the outlet, thereby realizing the reverse mode of the water jet pump, greatly improving the adaptability of the water jet pump under different working conditions.

[0014] 2. The water jet propulsion pump with adjustable blade angle described in the present invention, after the blade angle is adjusted to the right position, the motor will drive the wheel hub to reset, ensuring the integrity of the flow channel of the pump in the working state, without affecting the performance of the pump. Compared with the reverse mode achieved by the traditional reverse bucket, the solution provided by the present invention reduces the impact loss, has higher energy conversion efficiency and stronger controllability.

[0015] 3. The water jet pump with adjustable blade angle described in the present invention can achieve 180° angle adjustment of the water jet pump blades without destroying the integrity of the flow channel, thereby realizing the reverse mode of the water jet pump. Compared with the reverse mode realized by the traditional reverse bucket, it reduces impact loss, has higher energy conversion efficiency, and is more operable, and has high use value for the actual research on the structure of water jet pumps. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. The drawings described below are some embodiments of the present invention. For ordinary technicians in this field, it is obvious that other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is an exploded view of a water jet propulsion pump with adjustable blade angle according to the present invention.

[0018] Figure 2 This is an exploded view of the adjustable hub assembly according to the present invention.

[0019] Figure 3 This is an axial view of the water jet propulsion pump structure described in the present invention.

[0020] Figure 4 It is a cross-sectional view of the adjustable hub assembly described in the present invention.

[0021] Figure 5 It is a schematic diagram of interference when blades rotate in the prior art.

[0022] Figure 6 It is a schematic diagram of the hub base structure of the present invention.

[0023] Figure 7 This is a schematic diagram of the installation of the hub base described in the present invention.

[0024] Figure 8 Schematic diagram of the gear pair described in the present invention.

[0025] Fig. 9 This is a schematic diagram of the structure of the movable outer disk described in the present invention.

[0026] Fig.10 This is a schematic diagram of installing the movable outer disk described in the present invention.

[0027] Fig.11 This is a schematic diagram of the pin installation of the present invention.

[0028] Fig.12 The figure is a motion principle diagram of the adjustable hub assembly described in the present invention.

[0029] Fig.13 It is a schematic diagram of the working mode of the water jet propulsion pump described in the present invention.

[0030] In the figure:

[0031] 1-main motor; 2-fixed guide vane; 3-outer cover; 4-connecting section; 5-blade assembly; 6-adjustable hub assembly; 7-guide cover; 8-linear slide; 9-fixed outer disc; 10-blade base; 11-hub base; 113-gap slot; 114-first screw hole; 116-motor shaft hole; 117-second screw hole; 118-third screw hole; 12-bearing; 13-drive motor; 14-first gear; 15-first motor nut; 16-second gear; 161-arc slide; 17-second motor nut; 18-pin; 19-movable outer disc; 191-hub surface; 192-gap hole; 193-fourth screw hole; 194-slide rod. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] like Figure 1 As shown, the water jet propulsion pump with adjustable blade angle described in the present invention comprises a main motor 1, a fixed guide vane 2, an outer cover 3, a connecting section 4, a blade assembly 5, an adjustable hub assembly 6 and a guide cover 7; a fixed guide vane 2 is provided on one side of the outer cover 3, and the fixed guide vane 2 and the outer cover 3 are welded into a whole and fixed on the hull; the main motor 1 is installed at one end of the fixed guide vane 2, and the main motor 1 is transmission-connected with the adjustable hub assembly 6, and the motor 1 is a power source for driving the adjustable hub assembly 6 to rotate; the connecting section 4 is fixed to the end of the fixed guide vane 2; the blade assembly 5 is installed on the blade base 10 of the adjustable hub assembly 6, and the blade assembly 5 includes a driving end for driving the blade to rotate, which is the core component of the water jet propulsion pump and is designed according to different parameters; the guide cover 7 is installed at the end of the adjustable hub 6 to play a diversion role; the adjustable hub assembly 6 includes a mechanism for driving the radial movement of the hub around the blade assembly 5, which is used to eliminate the interference of the hub during the rotation of the blade.

[0036] like Figure 2 , Figure 3 and Figure 4 As shown, the adjustable hub assembly 6 includes a linear slide 8, a fixed outer disk 9, a blade base 10, a hub base 11, an actuator and a movable outer disk 19; the fixed outer disk 9 and the movable outer disk 19 are alternately distributed circumferentially to form a hub side wall, the hub base 11 is located at the center of the hub side wall, and the hub base 11 is connected to the main motor 1 in driving connection; a number of the fixed outer disks 9 are connected to the hub base 11, and a number of the blade bases 10 are connected to the hub base 11, one end of the blade base 10 passes through the movable outer disk 19, and the hub base 11 is provided with linear slides 8 corresponding to the several movable outer disks 19, one end of each of the movable outer disks 19 is movably installed in a linear slide 8, and the actuator is connected to one end of the movable outer disk 19, and is used to radially move the movable outer disk 19 by driving the movable outer disk 19 to move in the linear slide 8.

[0037] like Figure 6 , Figure 7In the embodiment, there are four fixed outer discs 9 and four movable outer discs 19, and the four fixed outer discs 9 are respectively mounted on the second screw holes 117 on the side of the hub base 11 by screws, and the four blade bases 10 are respectively mounted on the third screw holes 118 on the side of the hub base 11 by screws. One end of the blade base 10 passes through the movable outer disc 19, and the linear slide 8 is mounted on the first screw hole 114 of the hub base 11 by screws. One end of each movable outer disc 19 can be movably mounted in a linear slide 8. The hub base 11 is provided with a motor shaft hole 116, and the motor shaft hole 116 has two planes, which cooperate with the motor shaft to form a key transmission similar to that of the key transmission, and can transmit torque.

[0038] like Figure 8 As shown, the actuator includes a driving motor 13, a gear train, a second gear 16 and a pin 18; the second gear 16 is supported on the hub base 11 through a bearing 12, and the second gear 16 is positioned by a first motor nut 17. The driving motor 13 drives the second gear 16 to rotate through the gear train; an arcuate slot 161 opposite to the linear slot 8 is provided on the second gear 16, and the pin 18 passes through the arcuate slot 161 and the linear slot 8 to connect with the movable outer disk 19, and the movable outer disk 19 is moved radially by the rotation of the second gear 16. It can be seen from the figure that there is a radial displacement difference at both ends of the arcuate slot 161, so that the movable outer disk 19 can be moved radially. In the embodiment, the gear train is a primary reduction structure, the second gear 16 and the first gear 14 constitute a primary reduction structure, and the first gear 14 is mounted on the driving motor 13 through the first motor nut 15.

[0039] like Fig. 9 , Fig.10 and Fig.11 As shown, the movable outer disc 19 includes a hub surface 191, a clearance hole 192 and a slide bar 194; the hub surface 191 is provided with a clearance hole 192 at its center, the clearance hole 192 is clearance-matched with the blade base 10, the blade base 10 passes through the clearance hole 192, the hub surface 191 has an outer diameter equal to the hub outer diameter, and when fully opened, it forms a complete hub together with the fixed outer disc 9. A slide bar 194 is provided on one side of the hub surface 191, the slide bar 194 is located in the linear slide groove 8, a fourth screw hole 193 is provided at one end of the slide bar 194, and one end of the slide bar 194 is connected to the second gear 16 via a pin 18.

[0040] like Fig.12 and Fig.13 As shown, the working process is as follows:

[0041] The first gear 14, the second gear 16, the movable outer disk 19, the linear slide groove 8, the pin 18, the first motor nut 15, and the second motor nut 17 form a set of motion mechanisms, which can drive the movable outer disk 19 to move radially; the pin 18 is connected to the movable outer disk 19 as a whole, on the one hand, the pin 18 can only move in the arc slide groove 161, on the other hand, the movable outer disk 19 can only move in the linear slide groove 8, so the position of the pin 18 is always at the intersection of the linear groove and the arc groove; the driving motor 13 drives the first gear 14 to rotate, and drives the second gear 16 and the arc slide groove 161 on the second gear to rotate through the gear pair, thereby driving the pin 18 to move radially, and finally realizing the radial movement of the driving movable outer disk 19.

[0042] When the blade needs to be adjusted by 180°, the driving motor 13 drives the movable outer disc 19 to retract to avoid interference with the movable outer disc 19 during the blade adjustment process; when the blade is adjusted to the right position, the driving motor 13 drives the movable outer disc 19 to return to the right position to ensure the integrity of the flow channel. After the blade angle is adjusted to the right position, the main motor 1 rotates in the opposite direction, thereby realizing the water jet pump inlet to the outlet, and then realizing the reverse mode of the water jet pump.

[0043] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0044] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. All equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A water jet propulsion pump with adjustable blade angle, characterized in that: It comprises a main motor (1), a fixed guide vane (2), an outer cover (3), a blade assembly (5), an adjustable hub assembly (6) and a guide cover (7); A fixed guide vane (2) is provided on one side of the outer cover (3); the main motor (1) is mounted on one end of the fixed guide vane (2); the main motor (1) is in driving connection with an adjustable hub assembly (6); the blade assembly (5) is mounted on a blade base (10) of the adjustable hub assembly (6); the blade assembly (5) includes a driving end for driving the blades to rotate; the guide cover (7) is mounted on the end of the adjustable hub (6); the adjustable hub assembly (6) includes a mechanism for driving the hub around the blade assembly (5) to move radially, so as to eliminate interference of the hub during the rotation of the blades.

2. The water jet propulsion pump with adjustable blade angle according to claim 1, characterized in that: The adjustable hub assembly (6) comprises a linear slide groove (8), a fixed outer disk (9), a blade base (10), a hub base (11), an actuator and a movable outer disk (19); the fixed outer disk (9) and the movable outer disk (19) are alternately distributed circumferentially to form a hub side wall, the hub base (11) is located at the center of the hub side wall, and the hub base (11) is drivingly connected to the main motor (1); a plurality of the fixed outer disks (9) are connected to the hub base (11), and a plurality of the blade bases are connected to the hub base (11). (10) is connected to the hub base (11), one end of the blade base (10) passes through the movable outer disk (19), the hub base (11) is provided with linear slide grooves (8) corresponding to a plurality of movable outer disks (19), one end of each movable outer disk (19) is movably installed in a linear slide groove (8), and the actuator is connected to one end of the movable outer disk (19), and is used to move the movable outer disk (19) radially by driving the movable outer disk (19) to move in the linear slide groove (8).

3. The water jet propulsion pump with adjustable blade angle according to claim 2, characterized in that: The actuator comprises a driving motor (13), a gear train, a second gear (16) and a pin (18); the second gear (16) is supported on a hub base (11), and the driving motor (13) drives the second gear (16) to rotate through the gear train; an arcuate slide groove (161) opposite to the linear slide groove (8) is provided on the second gear (16), and the pin (18) passes through the arcuate slide groove (161) and the linear slide groove (8) to be connected with the movable outer disk (19), and the movable outer disk (19) is moved radially by the rotation of the second gear (16).

4. The water jet propulsion pump with adjustable blade angle according to claim 2, characterized in that: The movable outer disk (19) comprises a hub surface (191), a clearance hole (192) and a slide rod (194); a clearance hole (192) is provided at the center of the hub surface (191), the clearance hole (192) is clearance-matched with the blade base (10), a slide rod (194) is provided on one side of the hub surface (191), the slide rod (194) is located in the linear slide groove (8), and one end of the slide rod (194) is connected to the actuator.

5. The water jet propulsion pump with adjustable blade angle according to claim 2, characterized in that: Before the driving end drives the blade to rotate 180 degrees, the actuator first drives the movable outer disk (19) to contract radially to avoid interference with the movable outer disk (19) during the blade flipping process.

Images