CN115071936A - Independently driven three-stage underwater propeller - Google Patents

Abstract

The invention relates to an underwater propeller, in particular to an independently driven three-level underwater propeller. Including the water conservancy diversion cap, leading stator, the one-level impels the subassembly, the second grade impels the subassembly, tertiary subassembly and the tail water conservancy diversion awl of impelling, wherein the one-level impels the subassembly, second grade impels subassembly and tertiary subassembly coaxial setting in proper order, and impel to connect through first connecting ring between subassembly and the second grade impel the subassembly, impel to connect through first connecting ring between subassembly and the tertiary subassembly to the second grade, the front end that the subassembly was impeld to the one-level is fixed to leading stator, the water conservancy diversion cap is installed on leading stator, the rear end at tertiary subassembly that impels is fixed to the tail water conservancy diversion awl. The invention has compact structure and convenient arrangement in the using process; the oil filling sealing mode and the heat dissipation structure design of the motor stator part can ensure that the motor stator part can work in an underwater environment stably and at high power for a long time.

Description

An independently driven three-stage underwater propeller

technical field

The invention relates to an underwater propeller, in particular to an independently driven three-stage underwater propeller.

Background technique

Underwater propulsion is an important component that realizes the navigation ability of submersibles, underwater robots, etc., and can meet the thrust requirements of different operating tools such as underwater robots at different speeds.

However, with the wider application of underwater robots, the requirements for the propulsion efficiency, compactness and low noise characteristics of the propeller are becoming more and more obvious. The underwater operating environment requires the thruster to be waterproof and pressure-resistant. When applied to an underwater robot, the structure of the thruster is required to be as compact as possible to facilitate the arrangement of other equipment on the robot. Due to the limited energy carried on the underwater robot, the efficiency of the propeller is required to be as high as possible to meet the long-term navigation and operation requirements of the underwater robot. At the same time, the acoustic equipment carried on the underwater robot also has certain constraints on the self-noise generated by the propeller. The traditional propeller uses a motor to drive a single-stage propeller through a transmission shaft to generate thrust. This method has low transmission efficiency and takes up a lot of space. In order to meet the thrust requirements, the speed of the propeller is high or the diameter is large, which will produce strong noise. , which affects the acoustic equipment work of the underwater robot. In order to meet the underwater operating environment, the motor output shaft must be dynamically sealed, and the sealing position needs to be maintained regularly.

Therefore, it is necessary to design a propeller that can work in the underwater environment for a long time, and has a compact structure, high efficiency and low noise.

SUMMARY OF THE INVENTION

In view of the above problems, the purpose of the present invention is to provide an independently driven three-stage underwater propeller, which can work underwater for a long time and is independently driven by three rim motors.

In order to achieve the above object, the present invention adopts the following technical solutions:

An independently driven three-stage underwater propeller, comprising a deflector cap, a front guide vane, a first-stage propulsion assembly, a second-stage propulsion assembly, a third-stage propulsion assembly and a tail deflector cone, wherein the first-stage The propulsion assembly and the third-stage propulsion assembly are arranged coaxially in turn, and the first-stage propulsion assembly and the second-stage propulsion assembly are connected through a first connecting ring, and the second-stage propulsion assembly and the third-stage propulsion assembly are connected through a first connecting ring. The set guide vane is fixed on the front end of the first-stage propulsion assembly, the guide cap is installed on the front guide vane, and the tail guide cone is fixed on the rear end of the third-stage propulsion assembly.

The first-stage propulsion assembly, the second-stage propulsion assembly and the third-stage propulsion assembly have the same structure, and all include a rim motor, a propeller, a guide vane and a shaft, wherein the propeller is connected to the front end of the shaft and can rotate with the shaft; the rim motor is arranged on the shaft. The outer side of the rim of the propeller is used to drive the propeller to rotate;

The guide vane is rotatably arranged on the shaft, and the outer side of the rim of the guide vane is provided with an external oil inlet channel and an external oil return channel which are communicated with the rim motor.

The rim motor includes a stator casing, a stator front end cover, a watertight socket, a stator iron core, an inner isolation sleeve, a stator rear end cover, an oil plug, a rotor iron core and a stator sealing sleeve, wherein the rotor iron core is arranged on the wheel of the propeller. the outer side of the edge; the stator iron core is arranged on the inner wall of the stator casing, and corresponds to the rotor iron core, and the stator iron core is provided with a plurality of oil passage holes along the circumferential direction, and each oil passage hole is arranged in the axial direction; the front end cover of the stator The stator and the rear end cover are respectively arranged on both ends of the stator casing, the stator sealing sleeve is arranged between the front end cover of the stator and the rear end cover of the stator, and the watertight socket is fixed on the front end of the stator casing.

An inner oil inlet cavity and an inner oil return cavity are arranged between the stator iron core and the stator rear end cover. One end of the inner oil inlet cavity is communicated with the outer oil inlet passage, and the other end is connected with the stator iron core. The plurality of oil passages are connected to each other; the internal oil return cavity is communicated with the external oil return passage.

The inner oil inlet cavity and the inner oil return cavity are formed between the stator iron core and the stator rear end cover by an inner isolation sleeve, and the inner oil inlet cavity is located in the inner oil return cavity in the radial direction. outside of the cavity.

An outer isolation sleeve and an oil bag located on the outer side of the outer isolation sleeve are connected between the stator rear end cover and the rim of the first-stage guide vane, and the oil bag is fixed by the first-stage oil bag pressure ring arranged on the outer side; the outer isolation sleeve is The space between the sleeve and the oil bag forms the outer oil inlet channel; the inner space of the outer isolation sleeve forms the outer oil return channel.

A plurality of oil plugs are arranged on the front end cover of the stator along the circumferential direction.

A heat dissipation impeller is arranged between the guide vane and the shaft, and the heat dissipation impeller is connected with the shaft and rotates together with the shaft; the blades of the heat dissipation impeller correspond to the through holes in the rear half of the guide vane.

Both ends of the guide vane are connected with a front end cover of the wheel hub and a rear end cover of the wheel hub; an oil seal is embedded on the front end cover of the wheel hub, and a rear oil plug is installed on the rear end cover of the wheel hub.

The primary, secondary, and tertiary propulsion assemblies may operate independently as single-stage thrusters, or two or three stages may be connected in series to form thrusters of different stages.

The present invention has the following advantages and beneficial effects:

1. The present invention adopts a three-stage series-connected propulsion assembly. Compared with a single-stage propeller, the rotational speed is lower under the same thrust requirement, which can greatly reduce the noise of the propeller when it operates underwater.

2. The motor casing of the present invention adopts a sealing structure, the outgoing wires of the stator windings are drawn out through the water surface socket, the oil in the casing can resist the external water pressure, and the oil can be driven by the cooling impeller in the stator and the guide vane. The inner circulation of the blade ensures the insulation and cooling of the stator winding to meet the application requirements of the underwater environment.

3. The rotor iron cores of the propulsion assemblies at all levels of the present invention are directly sheathed on the propellers at all levels, with high transmission efficiency and compact structure.

4. The present invention adopts high-precision angular contact ball bearing, which has low noise and low bearing loss, and meets the requirements of long-term efficient and stable operation under water.

Description of drawings

Fig. 1 is the axonometric view of a kind of independently driven three-stage underwater propeller of the present invention;

Fig. 2 is a sectional view of an independently driven three-stage underwater propeller of the present invention;

3 is a partial cross-sectional view of a portion of a primary propulsion assembly of the present invention;

Figure 4 is a partial cross-sectional view of a portion of the stator casing of the primary propulsion assembly of the present invention;

5 is a partial cross-sectional view of the shaft portion of the first-stage propulsion assembly of the present invention;

Fig. 6 is the axial side view of the heat dissipation impeller of the first-stage propulsion assembly of the present invention;

Fig. 7 is a schematic diagram of oil circulation when the present invention works.

Among them: 1 is the guide cap, 2 is the front guide vane, 3 is the stator casing, 4 is the first connecting ring, 5 is the second-stage stator casing, 6 is the second connecting ring, and 7 is the third-stage stator casing , 8 is the third stage oil bag pressure ring, 9 is the first stage propeller, 10 is the first stage guide vane, 11 is the second stage propeller, 12 is the second stage guide vane, 13 is the third stage propeller, 14 is the third stage guide vane, 15 is the tail guide cone, 16 is the shaft, 17 is the front end cover of the stator, 18 is the watertight socket, 19 is the stator iron core, 20 is the inner isolation sleeve, 21 is the stator rear end cover, 22 is the oil plug, and 23 is the rotor iron core , 24 is the stator sealing sleeve, 25 is the outer isolation sleeve, 26 is the oil bag, 27 is the first-level oil bag pressure ring, 28 is the compression cover, 29 is the front end cover of the hub, 30 is the oil seal, 31 is the bearing, 32 is the heat dissipation For the impeller, 33 is the rear end cover of the hub, and 34 is the rear oil plug.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figures 1-3, an independently driven three-stage underwater propeller provided by the present invention includes a diversion cap 1, a front guide vane 2, a first-stage propulsion assembly, a second-stage propulsion assembly, and a third-stage propulsion assembly and the tail deflector cone 15, wherein the first-stage propulsion assembly, the second-stage propulsion assembly and the third-stage propulsion assembly are arranged coaxially in turn, and the first-stage propulsion assembly and the second-stage propulsion assembly are connected by the first connecting ring 4, and the second-stage propulsion assembly is connected. The assembly and the third-stage propulsion assembly are connected by the first connecting ring 6, the front guide vane 2 is fixed on the front end of the first-stage propulsion assembly, the guide cap 1 is installed on the front guide vane 2, and the tail guide cone 15 is fixed on the front guide vane 2. The rear end of the tertiary propulsion assembly.

As shown in FIGS. 4-5 , the first-stage propulsion assembly, the second-stage propulsion assembly and the third-stage propulsion assembly have the same structure, including a rim motor, a propeller, a guide vane and a shaft 16 , wherein the propeller is connected to the shaft 16 through a pressing cover 28 . The front end of the guide vane can rotate with the shaft 16; the rim motor is arranged on the outside of the rim of the propeller to drive the propeller to rotate; the guide vane is rotatably arranged on the shaft 16 through the bearing 31, and the outside of the rim of the guide vane is provided with a The external oil inlet channel and the external oil return channel communicated with the edge motor.

As shown in Figures 5-6, in the embodiment of the present invention, a heat dissipation impeller 32 is provided between the guide vane and the shaft 16, and the heat dissipation impeller 32 is connected with the shaft 16 and rotates together with the shaft 16. Further, there are several blades on the heat dissipation impeller 32, and the blades of the heat dissipation impeller 32 correspond to the rear half of the through holes on the guide vanes. The two ends of the guide vane are connected with the front end cover 29 of the hub and the rear end cover 33 of the hub;

As shown in FIG. 4 , in the embodiment of the present invention, the rim motor includes a stator casing 3 , a stator front end cover 17 , a watertight socket 18 , a stator iron core 19 , an inner isolation sleeve 20 , a stator rear end cover 21 , and an oil plug 22 , the rotor iron core 23 and the stator sealing sleeve 24, wherein the rotor iron core 23 is arranged on the outer side of the rim of the propeller; the stator iron core 19 is arranged on the inner wall of the stator casing 3 by means of interference fit, and is connected with the rotor iron core 23. Correspondingly, the stator core 19 has a number of oil passage holes along the circumferential direction, and each oil passage hole is arranged in the axial direction. The stator front end cover 17 and the stator rear end cover 21 are respectively arranged on both ends of the stator casing, the stator sealing sleeve 24 is arranged between the stator front end cover 17 and the stator rear end cover 21, and the front end of the stator casing 3 is provided with a plurality of water seals The socket 18, the lead wire of the stator winding of the motor is led out through the watertight socket 18. An internal oil inlet cavity and an internal oil return cavity are arranged between the stator core 19 and the stator rear end cover 21 . One end of the internal oil inlet cavity is communicated with the external oil inlet channel, and the other end is connected with several oil passages on the stator core 19 . The inner oil return cavity is communicated with the outer oil return passage.

Specifically, an inner oil inlet cavity and an inner oil return cavity are formed between the stator core 19 and the stator rear end cover 21 by the inner spacer sleeve 20, and the inner oil inlet cavity is located outside the inner oil return cavity in the radial direction. An outer spacer sleeve 25 and an oil bag 26 located outside the outer spacer sleeve 25 are connected between the stator rear end cover 21 and the rim of the primary guide vane 10 , and the oil bag 26 is fixed by a first-stage oil bag pressure ring 27 arranged on the outside. ; The space between the outer isolation sleeve 25 and the oil bag 26 forms an external oil inlet channel; the inner space of the outer isolation sleeve 25 forms an external oil return channel. The stator front end cover 17 is provided with a plurality of oil plugs 22 in the circumferential direction.

Further, the first-stage oil bag pressure ring 27, the oil bag pressure ring on the second-stage propulsion assembly, and the third-stage oil bag pressure ring 8 are all hollow structures. The vanes of the vanes 14 have a number of through holes, and the stator rear end cover 21 has two groups of through holes in the circumferential direction at different radial positions.

Specifically, the connection positions of the stator casing 3 , the stator front end cover 17 , the stator sealing sleeve 24 , the stator rear end cover 21 and the oil plug 22 are all guaranteed to be watertight by sealing rings, and the stator rear end cover 21 is at different radial positions along the circumferential direction. There are two groups of through holes, and the inner isolation sleeve 20 is installed on the rear end cover 21 of the stator to isolate the two groups of through holes on the rear end cover 21 of the stator. The oil bag pressure ring 27 is fixed on the primary guide vane 10, and tightly presses the oil bag 26 on the stator rear end cover 21 to ensure water tightness. The two sets of vias are isolated.

Specifically, a first-stage propeller 9 and a first-stage guide vane 10 are arranged in the first-stage propulsion assembly, a second-stage propeller 11 and a second-stage guide vane 12 are arranged in the second-stage propulsion assembly, and a third-stage propeller 13 and The third-stage guide vane 14 and the tail guide cone 15 are installed at the rear end of the third-stage guide vane 14. The propellers and guide vanes at each stage are designed independently and have different shapes. The first-stage propeller 9 is supported by the first-stage shaft, and the other stages The propellers are supported by their respective shafts, and there are several through holes inside the blades of the guide vanes at all levels, which are divided into two groups: front and rear.

As shown in Figure 5, three sets of bearings 31 are installed in the hub of the first-stage guide vane 10. The bearings 31 are high-precision angular contact ball bearings and are installed face to face. The first stage propeller 9 is matched, and is fixed and pressed by the pressing cover 28. The front and rear ends of the hub of the first stage guide vane 10 are equipped with a front end cover 29 and a rear end cover 33 of the wheel hub. 33 is fitted with a rear oil plug 34. The hub connection positions of the hub front end cover 29, the hub rear end cover 33 and the first-stage guide vane 10 are all watertight through the sealing ring, and the oil seal 30 and the shaft 16 are dynamic seals.

Further, the structures in the secondary propulsion assembly and the tertiary propulsion assembly are exactly the same as the primary propulsion assembly. After the propeller is assembled, the inside of the stator is filled with low-viscosity electrical insulating oil, and the oil fills the through holes in the guide vane and the hub bearing chamber, and ensures that there is no gas inside.

As shown in FIG. 7, taking the first-stage propulsion assembly as an example, when the propeller is running at full power, the first-stage propeller 9 is driven by the rotor iron core 23 to rotate at a high speed, and the first-stage propeller 9 drives the heat dissipation impeller 32 to rotate through the shaft 16, and the heat dissipation impeller rotates. 32 drives the internal oil to enter the external oil inlet channel between the oil bag 26 and the outer isolation sleeve 25 through the through hole of the rear half of the blade of the first-stage guide vane 10, and enters the stator through the outer through hole of the stator rear end cover 21. Inside the casing 3, through the through hole of the stator iron core 19 to the space near the watertight socket 18, the stator iron core 19 has tooth slots and winding gaps, and the oil passes through the tooth slots and winding gaps, and the inner through holes of the stator rear end cover 21. . The through holes of the first half of the vanes of the first-stage guide vanes 10 return to the position of the heat dissipation impeller, and the heat generated by the stator winding of the motor is dissipated to the external environment through the blades of the first-stage guide vanes 10 .

The invention provides an underwater propeller which can work in the underwater environment and has the characteristics of compact structure, high efficiency and low noise. The propeller adopts three-stage series-connected propulsion components, each stage of which is driven by a rim motor, and the rim motor rotor directly drives the propellers at all levels, with compact structure and high transmission efficiency. The rotating speed of the inner propeller is low, and the propellers at all levels can be independently designed and optimized according to the operating conditions, which can further improve the propulsion efficiency and reduce the noise; the stator part of the motor is sealed and filled with oil, which can protect the stator winding and resist the external pressure in deep water. There are through holes in the guide vane blades, and the heat dissipation impeller is driven by the shaft to circulate the oil to meet the heat dissipation requirements of the propeller during high-power operation. The primary, secondary, and tertiary propulsion assemblies can operate independently as single-stage thrusters, or two or three stages can be connected in series to form different stages of thrusters.

The invention adopts three rim motors to drive the propellers at all levels respectively, the motor rotors are directly sheathed on the propellers, the transmission efficiency is high, and the structure is compact. The stator and bearing parts of the first-stage motor are sealed and oil-filled, and the heat-dissipating impeller on the shaft can circulate the oil and can work in the underwater environment with high power for a long time.

The above descriptions are merely embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, expansion, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims (10)

1. The utility model provides an independent driven tertiary underwater propulsor, a serial communication port, including water conservancy diversion cap (1), leading stator (2), the one-level impels the subassembly, the second grade impels the subassembly, tertiary impels subassembly and tail water conservancy diversion awl (15), wherein the one-level impels the subassembly, second grade impels subassembly and tertiary coaxial setting in proper order, and the one-level impels to connect through first go-between (4) between subassembly and the second grade impels the subassembly, connect through first connecting ring (6) between second grade impels subassembly and the tertiary subassembly, leading stator (2) are fixed at the front end that the subassembly was impeld to the one-level, water conservancy diversion cap (1) is installed on leading stator (2), tail water conservancy diversion awl (15) are fixed at the rear end that the tertiary impels the subassembly.

2. An independently driven three stage underwater vehicle as claimed in claim 1 wherein the primary, secondary and tertiary propulsion assemblies are of the same construction and each comprise a rim motor, a propeller, vanes and a shaft (16), wherein the propeller is connected to the forward end of the shaft (16) and is rotatable with the shaft (16); the rim motor is arranged on the outer side of the rim of the propeller and used for driving the propeller to rotate;

the guide vane is rotationally arranged on the shaft (16), and an external oil inlet channel and an external oil return channel which are communicated with the rim motor are arranged on the outer side of the rim of the guide vane.

3. The independently driven three-stage underwater propulsor according to claim 2, wherein the rim motor comprises a stator casing (3), a stator front end cover (17), a watertight socket (18), a stator core (19), an inner spacer sleeve (20), a stator rear end cover (21), an oil plug (22), a rotor core (23) and a stator gland (24), wherein the rotor core (23) is arranged outside the rim of the propeller; the stator core (19) is arranged on the inner wall of the stator shell (3) and corresponds to the rotor core (23), a plurality of oil through holes are distributed on the stator core (19) along the circumferential direction, and each oil through hole is arranged along the axial direction; the stator front end cover (17) and the stator rear end cover (21) are respectively arranged at two ends of the stator casing, the stator sealing sleeve (24) is arranged between the stator front end cover (17) and the stator rear end cover (21), and the watertight socket (18) is fixed at the front end of the stator casing (3).

4. The independently driven three-stage underwater propulsor according to claim 3, wherein an internal oil inlet chamber and an internal oil return chamber are provided between the stator core (19) and the stator rear end cover (21), one end of the internal oil inlet chamber is communicated with the external oil inlet passage, and the other end is communicated with the plurality of oil through holes on the stator core (19); the internal oil return cavity is communicated with the external oil return channel.

5. The independently driven three-stage underwater vehicle according to claim 4, wherein said stator core (19) and said stator rear end cover (21) are separated by an inner spacer sleeve (20) to form said internal oil intake chamber and said internal oil return chamber, and said internal oil intake chamber is located outside said internal oil return chamber in the radial direction.

6. The independently driven three-stage underwater propulsor according to claim 4, wherein an outer isolation sleeve (25) and an oil pocket (26) located outside the outer isolation sleeve (25) are connected between the stator rear end cover (21) and the rim of the first-stage guide vane (10), and the oil pocket (26) is fixed by a first-stage oil pocket compression ring (27) arranged outside; the space between the outer isolation sleeve (25) and the oil bag (26) forms the outer oil inlet channel; the inner space of the outer isolation sleeve (25) forms the outer oil return channel.

7. An independently driven three-stage underwater propeller as claimed in claim 3, characterized in that said stator front cover (17) is provided with a plurality of oil dams (22) along the circumferential direction.

8. An independently driven three-stage underwater propeller according to claim 2, characterised in that a heat dissipating impeller (32) is provided between the guide vanes and the shaft (16), the heat dissipating impeller (32) being connected to the shaft (16) and rotating with the shaft (16); and the blades of the heat dissipation impeller (32) correspond to the rear half through holes on the guide vanes.

9. The independently driven three-stage underwater propeller as claimed in claim 2, characterized in that a hub front end cap (29) and a hub rear end cap (33) are connected to both ends of the guide vanes; an oil seal (30) is embedded on the front end cover (29) of the hub, and a rear oil plug (34) is arranged on the rear end cover (33) of the hub.

10. An independently driven three stage underwater vehicle as claimed in any one of claims 1 to 9 wherein the primary, secondary and tertiary propulsion assemblies are independently operable as single stage propellers or are connected in series with two or three stages to form propellers of different stages.

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