A jet pump propulsion device

Abstract

This utility model discloses a jet pump propulsion device, comprising: a pump casing having a water inlet section with a water inlet hole; a drive assembly including an impeller and a power component for rotating the impeller, the impeller being rotatably disposed inside the pump casing; and a guide section located within the water inlet section, the guide section having a guide surface on the side near the impeller for guiding external water flow towards the impeller, the guide surface opposite the water inlet hole, and the guide surface forming a guide channel with the inner wall of the water inlet section, the cross-section of the guide channel gradually increasing in the direction close to the impeller. This utility model can reduce shaking and vibration during propulsion, improving the smoothness of propulsion.

Description

Technical Field

[0001] This utility model relates to the technical field of jet pumps, and in particular to a jet pump propulsion device. Background Technology

[0002] Submersible jet pump propulsion systems, as a highly efficient underwater propulsion device, have been widely used in the marine industry. Their basic working principle involves a rotating impeller drawing external water at high speed into the pump casing, pressurizing and accelerating it, and then ejecting it at high speed from the tail nozzle.

[0003] Because the pump casing inlet section lacks an effective fluid rectification structure, when the external water flow is drawn into the pump casing at high speed, the water flow collides with the inner peripheral wall of the pump casing. During the suction process, the water flow forms a strong rotating vortex, and turbulent water flow is formed inside the pump casing. This causes the propeller body to shake and vibrate during operation, affecting the stable operation of the jet pump propeller. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a jet pump propulsion device that can reduce shaking and vibration during propulsion, thereby improving the smoothness of propulsion.

[0005] A jet pump propulsion device according to an embodiment of the present invention includes: a pump housing having a water inlet section having a water inlet hole; a drive assembly including an impeller and a power component for driving the impeller to rotate, the impeller being rotatably disposed inside the pump housing; and a flow guide section located within the water inlet section, the flow guide section having a flow guide surface on the side near the impeller for guiding external water flow towards the impeller, the flow guide surface being opposite to the water inlet hole, the flow guide surface forming a flow guide channel with the inner wall of the water inlet section, the cross-section of the flow guide channel gradually increasing in the direction close to the impeller.

[0006] A jet pump propulsion device according to an embodiment of the present utility model has at least the following beneficial effects: This invention, by setting up a flow guide section, utilizes a power component to drive the impeller to rotate. The impeller rotates inside the pump casing, creating a negative pressure inside the casing. External water can be drawn into the pump casing through the inlet hole. The flow guide section guides the water flow using a guide surface, allowing the water to move along the guide channel. This prevents the water from colliding perpendicularly with the inner wall of the pump casing upon entering, thus avoiding turbulent flow or vortices. The gradually expanding guide channel guides the water flow in a regular manner, reducing the amount of water entering the pump casing and causing turbulence and vortices. This reduces the impact of turbulent flow on the impeller-driven water flow, which is beneficial for increasing the propulsion speed of the propeller. At the same time, it also reduces the shaking and vibration generated during propulsion, improving the smoothness of propulsion.

[0007] According to an embodiment of the present invention, the guide surface of a jet pump propulsion device is an inclined surface or an arc surface.

[0008] According to an embodiment of the present invention, a jet pump propulsion device is provided, wherein the power component is an electric motor, the electric motor has a connecting seat, the connecting seat is matched with the inner wall of the pump housing, and the flow guide is integrally formed with the connecting seat.

[0009] According to an embodiment of the present invention, a jet pump propulsion device is provided, wherein the motor has an output shaft, and the output shaft passes through the guide surface and is coaxially connected to the impeller.

[0010] According to an embodiment of the present invention, a jet pump propulsion device further includes a sealing seat, which is connected to the flow guide portion and disposed between the flow guide portion and the output shaft to seal the gap between the flow guide portion and the output shaft.

[0011] According to an embodiment of the present invention, a jet pump propulsion device is provided in which the guide surface is formed between the sealing seat and the guide portion near the impeller.

[0012] According to an embodiment of the present invention, a jet pump propulsion device further includes a flow guide sleeve. The pump housing has a water outlet section that is connected to the flow guide sleeve. The flow guide sleeve is provided with a plurality of flow guide plates, which extend axially along the flow guide sleeve and are distributed circumferentially along the flow guide sleeve.

[0013] According to an embodiment of the present invention, a jet pump propulsion device has guide vanes inside the water outlet section, the number of guide vanes corresponding to the number of guide plates, and the guide vanes having a curved structure.

[0014] According to an embodiment of the present invention, a jet pump propulsion device is provided inside the pump casing, the support base is rotatably disposed with the impeller, and the guide vane is disposed between the support base and the pump casing.

[0015] According to an embodiment of the present invention, a jet pump propulsion device has a water inlet section having a plurality of baffles distributed circumferentially along the pump casing, and the water inlet hole is formed between the baffles.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a jet pump propulsion device according to an embodiment of the present utility model; Figure 2 for Figure 1 A cross-sectional view of a jet pump propulsion device is shown; Figure 3 for Figure 2 A three-dimensional cross-sectional view of a jet pump propulsion device is shown; Figure 4 for Figure 1 An exploded view of a jet pump propulsion device is shown.

[0019] Reference numerals: 100-pump casing, 110-inlet hole, 120-impeller, 130-guide surface, 140-motor, 150-connecting seat, 160-sealing seat, 170-output shaft, 180-guide sleeve, 190-guide plate, 200-guide vane, 210-support seat, 220-partition plate. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] A jet pump propulsion device according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0025] Reference Figure 1 The present invention aims to provide an embodiment of a jet pump propulsion device.

[0026] A jet pump propulsion device according to an embodiment of this utility model, referring to... Figure 1 and Figure 2 The pump includes a pump casing 100, a drive assembly, and a guide section. The pump casing 100 has a water inlet section with a water inlet hole 110. The drive assembly includes an impeller 120 and a power component that drives the impeller 120 to rotate. The impeller 120 is rotatably disposed inside the pump casing 100. The guide section is located inside the water inlet section. A guide surface 130 is provided on the side of the guide section near the impeller 120 and is used to guide external water flow to the impeller 120. The guide surface 130 is opposite to the water inlet hole 110, and the guide surface 130 and the inner wall of the water inlet section form a guide channel. The cross-section of the guide channel gradually increases in the direction close to the impeller 120.

[0027] Understandably, this utility model, by setting a flow guide section, uses a power component to drive the impeller 120 to rotate. The impeller 120 rotates inside the pump casing 100, creating a negative pressure inside the pump casing 100. External water can be drawn into the pump casing 100 through the water inlet 110. The flow guide section uses the flow guide surface 130 to guide the water flow, allowing the water flow to move along the flow guide channel. This avoids the water flow from colliding perpendicularly with the inner wall of the pump casing 100 when it enters the pump casing 100, which would cause the water flow to be swirled up and form turbulent water flow or vortex. The gradually expanding flow guide channel can guide the water flow to flow in a regular manner, reducing the water flow swirling up inside the pump casing 100, reducing turbulent water flow and vortex. Thus, it reduces the impact of turbulent water flow on the impeller 120 driving the water flow, which is beneficial to improving the propulsion speed of the propeller. At the same time, it also reduces the shaking and vibration generated during the operation of the propeller, improving the stability of the propulsion of the propeller.

[0028] In some embodiments of this utility model, the water inlet section has multiple baffles 220, which are distributed circumferentially along the pump casing 100, and water inlet holes 110 are formed between the baffles 220.

[0029] Preferably, the guide surface 130 can be an arc-shaped surface, which can form a gradually expanding guide channel with the inner wall of the pump casing 100, which helps to reduce the water flow swirl in the pump casing 100 and reduce turbulent water flow and vortex.

[0030] Of course, in some designs, the guide surface 130 can also be inclined.

[0031] In some embodiments of this utility model, the power component is a motor 140, the motor 140 has a connecting seat 150, the connecting seat 150 matches the inner wall of the pump housing 100, and the flow guide part is integrally formed with the connecting seat 150.

[0032] It is understandable that by inserting the connector 150 into the pump housing 100 and then fixing the pump housing 100 to the connector 150 with bolts, the flow guide is located inside the pump housing 100, thereby saving the installation steps of the flow guide and improving installation efficiency.

[0033] In some embodiments of this utility model, reference is made to Figure 2 and Figure 3 The motor 140 has an output shaft 170, which passes through the guide surface 130 and is coaxially connected to the impeller 120. Therefore, the motor 140 directly drives the impeller 120 through the output shaft 170, reducing power loss.

[0034] In some embodiments of this utility model, reference is made to Figure 2 and Figure 3 It also includes a sealing seat 160, which is connected to the flow guide and is disposed between the flow guide and the output shaft 170 to seal the gap between the flow guide and the output shaft 170.

[0035] Understandably, the sealing seat 160 may have a sealing ring, which, in conjunction with the output shaft 170, prevents external water from entering the motor 140 and improves the sealing performance of the motor 140.

[0036] In some embodiments of this utility model, a guide surface 130 is formed between the sealing seat 160 and the guide portion near the impeller 120. This increases the area of ​​the guide surface 130, preventing water from colliding vertically with the inner wall of the pump casing 100 when it enters the pump casing 100, thus avoiding water from being rolled up and forming turbulent water flow or vortex, thereby reducing turbulent water flow and vortex.

[0037] In some embodiments of this utility model, reference is made to Figure 3 and Figure 4 It also includes a guide sleeve 180, and the pump housing 100 has a water outlet section that is connected to the guide sleeve 180. Multiple guide plates 190 are provided inside the guide sleeve 180. The multiple guide plates 190 extend along the axial direction of the guide sleeve 180 and are distributed along the circumference of the guide sleeve 180.

[0038] Understandably, the guide sleeve 180 circumferentially guides the guide plate 190 to form a water outlet rectifier grid. The guide plate 190 guides the water jetted from the impeller 120, thereby reducing the occurrence of vortices in the jetted water and preventing turbulent water flow from affecting the propulsion speed of the thruster.

[0039] In some embodiments of this utility model, the water outlet section has guide vanes 200 inside, the number of guide vanes 200 corresponds to the number of guide plates 190, and the guide vanes 200 have a curved structure.

[0040] It is understandable that by setting the guide vane 200, the water flow ejected by the impeller 120 is guided by the guide vane 200 with a specific curved structure, thereby increasing the speed of the water flow ejected by the impeller 120.

[0041] In some embodiments of this utility model, reference is made to Figure 3 and Figure 4 A support base 210 is provided inside the pump casing 100. The support base 210 is rotatably mounted to the impeller 120, and a guide vane 200 is provided between the support base 210 and the pump casing 100. It can be understood that the support base 210 is used to support the output shaft 170, thereby reducing the oscillation of the impeller 120 and improving the stability of the impeller 120's rotation.

[0042] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A jet pump propulsion device, characterized in that, include: Pump housing (100), the pump housing (100) having a water inlet section, the water inlet section having a water inlet hole (110). The drive assembly includes an impeller (120) and a power component that drives the impeller (120) to rotate. The impeller (120) is rotatably disposed inside the pump casing (100). The guide section is located within the water inlet section. A guide surface (130) is provided on the side of the guide section near the impeller (120) and is used to guide external water flow to the impeller (120). The guide surface (130) is opposite to the water inlet hole (110). The guide surface (130) and the inner wall of the water inlet section form a guide channel. The cross-section of the guide channel gradually increases in the direction close to the impeller (120).

2. The jet pump propulsion device according to claim 1, characterized in that, The guide surface (130) is an inclined surface or an arc surface.

3. A jet pump propulsion device according to claim 1, characterized in that, The power component is a motor (140), the motor (140) has a connecting seat (150), the connecting seat (150) matches the inner wall of the pump housing (100), and the flow guide is integrally formed with the connecting seat (150).

4. A jet pump propulsion device according to claim 3, characterized in that, The motor (140) has an output shaft (170) that passes through the guide surface (130) and is coaxially connected to the impeller (120).

5. A jet pump propulsion device according to claim 4, characterized in that, It also includes a sealing seat (160) connected to the flow guide portion. The sealing seat (160) is disposed between the flow guide portion and the output shaft (170) to seal the gap between the flow guide portion and the output shaft (170).

6. A jet pump propulsion device according to claim 5, characterized in that, The guide surface (130) is formed between the sealing seat (160) and the guide portion on the side near the impeller (120).

7. A jet pump propulsion device according to claim 1, characterized in that, It also includes a flow guide sleeve (180), the pump casing (100) has a water outlet section that is connected to the flow guide sleeve (180), and a plurality of flow guide plates (190) are provided inside the flow guide sleeve (180). The plurality of flow guide plates (190) extend axially along the flow guide sleeve (180) and are distributed circumferentially along the flow guide sleeve (180).

8. A jet pump propulsion device according to claim 7, characterized in that, The water outlet section has guide vanes (200) inside, and the number of guide vanes (200) corresponds to the number of guide plates (190). The guide vanes (200) have a curved structure.

9. A jet pump propulsion device according to claim 8, characterized in that, The pump casing (100) is provided with a support base (210) inside, the support base (210) is rotatably disposed with the impeller (120), and the guide vane (200) is disposed between the support base (210) and the pump casing (100).

10. A jet pump propulsion device according to claim 1, characterized in that, The water inlet section has a plurality of baffles (220) distributed circumferentially along the pump casing (100), and the water inlet holes (110) are formed between the baffles (220).

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