CN111547216B - Pod propeller and mounting method of stator of propelling motor of pod propeller - Google Patents
Pod propeller and mounting method of stator of propelling motor of pod propeller Download PDFInfo
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- CN111547216B CN111547216B CN202010272703.5A CN202010272703A CN111547216B CN 111547216 B CN111547216 B CN 111547216B CN 202010272703 A CN202010272703 A CN 202010272703A CN 111547216 B CN111547216 B CN 111547216B
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- stator
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- support rings
- cavity
- outer ring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
- B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
- B63H2005/1254—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis
- B63H2005/1258—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis with electric power transmission to propellers, i.e. with integrated electric propeller motors
Abstract
The invention provides a pod propeller and a mounting method of a propulsion motor stator thereof, and belongs to the field of pod propellers. The pod propeller comprises a pod shell, a propelling motor and a propeller, wherein the propelling motor comprises a stator, a rotor and an output shaft, the stator is a hollow cylinder, a cavity of the stator is arranged in the pod shell, the inner wall of the cavity is in contact with the outer wall of the stator, the stator is sleeved on the rotor, the rotor is sleeved on the output shaft, the propeller is positioned outside the cavity, the pod propeller further comprises two expansion sleeves, the two expansion sleeves are respectively sleeved at two ends of the stator, and the two expansion sleeves are respectively clamped between the inner wall of the cavity and the outer wall of the stator.
Description
Technical Field
The disclosure relates to the field of pod propellers, in particular to a pod propeller and a mounting method of a stator of a propelling motor of the pod propeller.
Background
Pod propulsion is a recent emerging marine propulsion device. The pod propeller is used for placing a propelling motor outside a cabin, is directly connected with the propeller and can horizontally rotate within 360 degrees to realize vector propulsion. The stator of the motor is generally mounted and fixed on the nacelle housing and is mainly used for being connected with a power supply to generate a rotating magnetic field and driving the rotor of the motor to operate to generate power.
Currently, common stator and nacelle housing mounting methods are welding, shrink fitting, bolting, and keying. The welding is operated manually, the requirement on the quality of the welding seam is high, and the manufacturing defects are large; the hot jacket installation process is complex, extra heating and pressurizing equipment is needed, and when the size is large and the hot jacket stroke is large, the huge risk of cooling jacket death in the hot jacket process exists; the bolt connection has smaller and smaller advantages in the installation of the motor stator of the large nacelle due to the dual requirements of structural strength and reliability; key mounting is also a more common mounting but not only does it require slots in the stator and nacelle housing, but it can lead to unbalanced loading of the motor torque, resulting in wear and reduced life.
Disclosure of Invention
The embodiment of the disclosure provides a pod propeller and a mounting method of a propulsion motor stator thereof, which can simplify the mounting process and improve the product percent of pass while ensuring fixed connection. The technical scheme is as follows:
in one aspect, a pod thruster is provided, the pod thruster comprising a pod housing, a propulsion motor and a propeller,
the propulsion motor comprises a stator, a rotor and an output shaft, the stator is a hollow cylinder, a cavity for mounting the stator is arranged in the pod shell, the inner wall of the cavity is in contact with the outer wall of the stator, the stator is sleeved on the rotor, the rotor is sleeved on the output shaft, the propeller is positioned outside the cavity,
the pod propeller further comprises two expansion sleeves, the two expansion sleeves are respectively sleeved at two ends of the stator, and the two expansion sleeves are respectively clamped between the inner wall of the cavity and the outer wall of the stator.
Optionally, each of the two expansion sleeves comprises an inner ring, an outer ring and a screw,
the inner ring is a split ring and comprises a sleeve body and a flange surface which is arranged on the outer wall of one end of the sleeve body along the circumferential direction,
the sleeve body is clamped between the stator and the outer ring, the outer ring is clamped between the sleeve body and the inner wall of the cavity, the end face of the outer ring is opposite to the flange face, and the outer ring is connected with the flange face through the screw.
Optionally, the outer surface of the inner ring is conical, the inner surface of the inner ring is matched with the stator,
the inner surface of the outer ring is in a conical shape matched with the outer surface of the inner ring, and the outer surface of the outer ring is matched with the cavity.
Optionally, the flange surface is arranged on the large end of the inner ring, and the small end of the inner ring is inserted into the outer ring.
Optionally, the number of the screws is two or more, and each screw is fixed on the flange surface at an even interval.
Optionally, the pod propeller further comprises at least two first support rings, each of the first support rings is uniformly sleeved on the stator at intervals and clamped between the cavity and the stator, the two expansion sleeves are respectively sleeved on the first support rings, and ventilation holes are formed in the stator between every two adjacent first support rings along the circumferential direction.
Optionally, four ventilation holes are arranged on the stator between the two adjacent first support rings, and the four ventilation holes are uniformly distributed along the circumferential direction of the stator.
Optionally, the pod thruster further includes at least two second support rings, the number of the first support rings is the same as that of the second support rings, the first support rings correspond to the second support rings one to one, each of the second support rings is fixed to the cavity at intervals, and the second support rings are sleeved on the corresponding first support rings and clamped between the cavity and the corresponding first support rings.
In another aspect, there is provided a method of mounting a propulsion motor stator of a pod propeller, the method comprising:
moving a propulsion motor stator into a cavity of a pod housing, wherein the propulsion motor stator is a hollow cylinder, the cavity is used for mounting the propulsion motor stator, and the inner wall of the cavity is in contact with the outer wall of the propulsion motor stator;
and two expansion sleeves are sleeved at two ends of the propulsion motor stator respectively, and the two expansion sleeves are respectively clamped between the cavity and the propulsion motor stator.
Optionally, each of the two expansion sleeves comprises an inner ring, an outer ring and a screw, the inner ring comprises a sleeve body and a flange surface arranged on the outer wall of one end of the sleeve body along the circumferential direction,
the suit respectively with two bloated tight overlaps to propulsion motor stator's both ends include:
sleeving an outer ring of the expansion sleeve to one end of the stator of the propulsion motor;
sleeving a sleeve body of an inner ring of the expansion sleeve between the propulsion motor stator and the outer ring, wherein the end surface of the outer ring is opposite to the flange surface, and the outer ring is clamped between the sleeve body and the inner wall of the cavity;
and adopting screws to lock the outer ring and the flange surface.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:
the pod propeller comprises a pod shell, a propelling motor and a propeller, wherein the propelling motor comprises a stator, a rotor and an output shaft, the stator is a hollow cylinder, a cavity for mounting the stator is arranged in the pod shell, the inner wall of the cavity is in contact with the outer wall of the stator, the stator is sleeved on the rotor, the rotor is sleeved on the output shaft, the propeller is positioned outside the cavity, the stator rotates to drive the output shaft to rotate, and then the propeller is driven to rotate, so that the function of the pod propeller is realized; two expansion sleeves are respectively sleeved at two ends of a stator of the propulsion motor, are clamped between the inner wall of the cavity and the outer wall of the stator, and generate enough pressure and friction force between the nacelle shell and the motor stator to realize the fixed connection between the nacelle shell and the motor stator, so that the nacelle shell is safe and reliable; the installation process of the expansion sleeve is simple, the stator installation process of the propulsion motor can be simplified, and the product percent of pass is improved; in addition, extra heating and pressurizing devices are not needed in the installation process, the manufacturing cost is greatly reduced, the product percent of pass is improved, meanwhile, grooves are not needed to be formed in the pod shell and the motor stator, the connected piece is not affected in strength, abrasion is avoided, and the service life is long.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic view of a nacelle thruster with a propeller removed provided by an embodiment of the disclosure;
FIG. 2 is a schematic diagram of a nacelle thruster with a propeller removed provided by an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of an inner ring provided by embodiments of the present disclosure;
FIG. 4 is a schematic structural diagram of an expansion sleeve provided by an embodiment of the disclosure;
FIG. 5 is a flow chart of a method of mounting a propulsion motor stator of a pod propeller provided by an embodiment of the present disclosure;
fig. 6 is a flowchart of a method of mounting a propulsion motor stator of a pod propeller provided by an embodiment of the present disclosure.
In the drawings, the reference numbers of the various parts are as follows:
1 pod housing, 2 stator, 3 expansion sleeve, 4 inner ring, 41 sleeve body, 42 flange face, 5 outer ring, 6 screw, 7 first support ring, 8 ventilation hole, 9 second support ring.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
To facilitate an understanding of the technical solutions provided by the embodiments of the present disclosure, a nacelle propeller will first be described. Pod propellers are mainly used for vessel propulsion and steering. Pod propulsion is generally made up of a drive motor (propulsion motor) and a propeller module. The propulsion motor can be arranged outside the cabin, is directly connected with the propeller and can horizontally rotate within 360 degrees to realize vector propulsion. The propulsion motor is mainly a permanent magnet alternating current motor, and a stator of the propulsion motor is generally installed and fixed in a pod shell and is mainly used for being connected with a power supply to generate a rotating magnetic field and driving a rotor of the propulsion motor to rotate to generate power.
Fig. 1 and fig. 2 are respectively schematic structural diagrams of a pod propeller with a propeller removed according to an embodiment of the present disclosure. Referring to fig. 1 and 2, the pod thruster comprises a pod housing 1, a propulsion motor and a propeller.
The propulsion motor comprises a stator 2, a rotor (not shown in the figure) and an output shaft (not shown in the figure), wherein the stator 2 is a hollow cylinder, a cavity for mounting the stator 2 is arranged in a pod shell 1, the inner wall of the cavity is in contact with the outer wall of the stator 2, the stator 2 is sleeved on the rotor, the rotor is sleeved on the output shaft, a propeller is sleeved on the output shaft, and the propeller is positioned outside the cavity.
The pod propeller further comprises two expansion sleeves 3, the two expansion sleeves 3 are respectively sleeved at two ends of the stator 2, and the two expansion sleeves 3 are respectively clamped between the inner wall of the cavity and the outer wall of the stator 2.
One end of the stator 2 is provided with one expansion sleeve 3, the other end of the stator 2 is provided with the other expansion sleeve 3, and the two expansion sleeves 3 are used for bearing the torque generated by the stator 2 and the nacelle shell 1 in the rotor operation process.
In the embodiment of the disclosure, the pod propeller comprises a pod shell 1, a propulsion motor and a propeller, wherein the propulsion motor comprises a stator 2, a rotor and an output shaft, the stator 2 is a hollow cylinder, a cavity for mounting the stator 2 is arranged in the pod shell 1, the inner wall of the cavity is in contact with the outer wall of the stator 2, the stator 2 is sleeved on the rotor, the rotor is sleeved on the output shaft, the propeller is positioned outside the cavity, the stator rotates to drive the output shaft to rotate, and further the propeller is driven to rotate, so that the function of the pod propeller is realized; two expansion sleeves 3 are respectively sleeved at two ends of a stator 2 of a propulsion motor, the two expansion sleeves 3 are respectively clamped between the inner wall of the cavity and the outer wall of the stator 2, and the two expansion sleeves 3 generate enough pressure and friction force between the nacelle shell 1 and the motor stator 2 to realize the fixed connection between the nacelle shell 1 and the motor stator 2, so that the safety and the reliability are realized; the installation process of the expansion sleeve 3 is simple, the stator installation process of the propulsion motor can be simplified, and the product percent of pass is improved; in addition, extra heating and pressurizing equipment is not needed in the installation process, the manufacturing cost is greatly reduced, the product percent of pass is improved, meanwhile, grooves are not needed to be formed in the nacelle shell 1 and the motor stator 2, the connected piece is not affected in strength, abrasion is avoided, and the service life is long.
The propulsion motor may illustratively be a permanent magnet synchronous motor for driving rotation of the propeller.
The permanent magnet synchronous motor is a synchronous motor which generates a synchronous rotating magnetic field by permanent magnet excitation. In the permanent magnet synchronous motor, the structure of a rotor is formed by rotor permanent magnets. In the related art, the output shaft may be a part of the rotor. Illustratively, the rotor is composed of a plurality of magnetic steel base plates in a fan shape, and the magnetic steel base plates are uniformly arranged on the peripheral wall of the output shaft by taking the axial lead of the output shaft as the center.
The structure of the stator 2 is mostly formed by dipping paint on the inner winding, and the stator may include a stator core and a stator winding wound on the stator core. The stator winding can generate a variable rotating magnetic field after being electrified, and the rotor rotates under the action of electromagnetic force in the rotating magnetic field, so that the output shaft is driven to rotate.
Optionally, the cavity in which the stator 2 is mounted, the stator and the rotor are arranged concentrically.
The permanent magnet synchronous machine may be, for example, a high power machine.
Optionally, the number of the propellers can be one or two, and when one propeller is provided, the propeller is sleeved at one end of the output shaft; when two propellers are arranged, one propeller is connected with one end of the output shaft, and the other propeller is connected with the other end of the output shaft.
For the expansion sleeve, the expansion sleeve is a component widely applied to mechanical connection under heavy load, and is a keyless connection device which realizes load transmission by means of pressure and friction force generated between containing surfaces by screwing a high-strength bolt.
Illustratively, each of the two expansion sleeves 3 comprises an inner ring 4, an outer ring 5 and a screw 6.
The inner ring 4 is an open ring, and the inner ring 4 includes a sleeve body 41 and a flange surface 42 arranged on an outer wall of one end of the sleeve body 41 along the circumferential direction.
The sleeve body 41 is clamped between the stator 2 and the outer ring 5, the outer ring 5 is clamped between the sleeve body 41 and the inner wall of the cavity, the end surface of the outer ring 5 is opposite to the flange surface 42, and the outer ring 5 is connected with the flange surface 42 through the screw 6.
Fig. 3 is a schematic structural diagram of an inner ring provided in an embodiment of the present disclosure. Referring to fig. 3, the inner ring is a split ring. The split ring facilitates the installation of the inner ring.
Fig. 4 is a schematic structural diagram of an expansion sleeve provided by the embodiment of the disclosure. Referring to fig. 3 and 4, the sleeve body 41 of the inner ring 4 is clamped between the stator 2 and the outer ring 5, a first end of the sleeve body 41 of the inner ring 4 is provided with a flange surface 42, an end surface of the outer ring 5 is opposite to the flange surface 42, the outer ring 5 is connected with the flange surface 42 through a screw 6, and a second end of the sleeve body 41 of the inner ring 4 is located in the outer ring 5.
As previously mentioned, the expansion sleeve is a keyless coupling device which achieves load transfer by tightening a high strength screw to create sufficient pressure and friction between the receiving surfaces. When the high-strength screw is screwed down, the inner ring is displaced along the axial direction of the output shaft, so that pressure is generated between the outer ring and the nacelle shell 1 and between the inner ring and the stator 2, and keyless connection is realized under the action of friction force.
Illustratively, the number of the screws 6 is two or more, and each of the screws 6 is fixed on the flange surface 42 at regular intervals.
Alternatively, the number of screws 6 may be 8.
When the screws 6 are tightened, the outer ring 5 and the inner ring 6 are respectively expanded outwards and inwards, so that the stator and the flange of the motor are expanded tightly, and the sliding between the stator and the flange is avoided when the motor runs.
Illustratively, the outer surface of the inner ring 4 is conical, and the inner surface of the inner ring 4 is matched with the stator 2.
The inner surface of the outer ring 5 is in a conical shape matched with the outer surface of the inner ring 4, and the outer surface of the outer ring 5 is matched with the cavity.
When the outer surface of the inner ring 4 is conical, the flange surface 42 is arranged at the large end of the inner ring 4, and the small end of the inner ring 4 is inserted into the outer ring 5.
That is, the diameter of the outer surface cross section of the inner ring 4 decreases from the flange face 42 in the axial direction of the inner ring in sequence.
Illustratively, at least two screws 6 are fixed to the flange face 42 at regular intervals.
Illustratively, the pod propeller further comprises at least two first support rings 7, each first support ring 7 is sleeved on the stator 2 at intervals and clamped between the cavity and the stator 2, the two expansion sleeves 3 are respectively sleeved on the first support rings 7, and ventilation holes 8 are formed in the stator 2 between every two adjacent first support rings 7 along the circumferential direction.
The first support ring 7 may be a steel structure grid arranged on the outer wall of the stator. Referring to fig. 1, since the first support rings 7 mounted at both ends of the stator 2 need to be provided with the expansion sleeves 3, the outer diameters of the first support rings 7 mounted at both ends of the stator 2 are smaller than the outer diameters of the first support rings 7 at other positions.
The ventilation holes 8 are used for dissipating heat generated when the motor works, and after the heat comes out of the ventilation holes 8, the heat flows along a flow channel formed by the space between two adjacent first support rings 7 and is dissipated to the nacelle shell. The heat is dissipated to the outside by the nacelle housing.
Illustratively, four ventilation holes 8 are arranged on the stator 2 between two adjacent first support rings 7, and the four ventilation holes 8 are uniformly distributed along the circumferential direction of the stator 2.
Illustratively, four ventilation holes 8 may be located on the same cross section of the stator 2.
The four ventilation holes are uniformly distributed, so that uniform heat dissipation is realized, the working temperature of the motor is ensured to be uniform, and the working stability of the motor is improved.
Exemplarily, the pod propeller further comprises at least two second support rings 9, the number of the first support rings 7 is the same as that of the second support rings 9, the first support rings 7 correspond to the second support rings 9 one by one, each of the second support rings 9 is fixed to the cavity at intervals, and the second support rings 9 are sleeved on the corresponding first support rings 7 and are clamped between the cavity and the corresponding first support rings 7.
Wherein, can be for little clearance or transition fit relation between first support ring 7 of assorted and the second support ring 9, first support ring 7 with the second support ring 9 one-to-one, the stator axial installation of motor is in place the back, and corresponding first support ring 7 can align completely with second support ring 9, makes the runner space between the first support ring 7 further increase like this.
By means of the first support ring 7 and the second support ring 9, the nacelle housing 1 and the stator 2 can be positioned and supported, and the radial support strength can be ensured.
The space formed between two adjacent second support rings 9 is a heat dissipation air duct, and is communicated with the flow channel formed between two adjacent first support rings. After the stator 2 is installed in place, all the radial ventilation holes 8 in the motor stator 2 are aligned with the heat dissipation air duct of the nacelle shell 1 through the flow channel in the stator, so that cooling air of the motor has enough ventilation capacity, heat dissipation is facilitated, the heat dissipation effect is achieved, and the motor is cooled.
Fig. 5 is a flow chart of a method for mounting a stator of a propulsion motor of a pod propeller according to an embodiment of the present disclosure, which is suitable for mounting the stator of the propulsion motor of the pod propeller shown in fig. 1 and 2. Referring to fig. 5, the installation method flow may include the following steps.
The propelling motor stator is a hollow cylinder, the cavity is used for mounting the propelling motor stator, and the inner wall of the cavity is in contact with the outer wall of the propelling motor stator.
And step 502, sleeving the two expansion sleeves to two ends of a stator of the propulsion motor respectively.
Wherein, two expand the tight cover and press from both sides respectively and establish between cavity and stator.
In the embodiment of the disclosure, the stator of the propulsion motor is moved into the cavity of the nacelle shell, and then the two expansion sleeves are sleeved at two ends of the stator of the propulsion motor respectively, and the two expansion sleeves are clamped between the cavity and the stator respectively; the two expansion sleeves generate enough pressure and friction force between the nacelle shell and the motor stator to realize the fixed connection between the nacelle shell and the motor stator, and the nacelle shell and the motor stator are safe and reliable; the installation process of the expansion sleeve is simple, the stator installation process of the propulsion motor can be simplified, and the product percent of pass is improved; in addition, extra heating and pressurizing equipment is not needed in the installation process, the manufacturing cost is greatly reduced, the product percent of pass is improved, meanwhile, grooves are not needed to be formed in the pod shell and the motor stator, the connected piece is not affected in strength, abrasion is avoided, and the service life is long.
Fig. 6 is a flow chart of a method for mounting a stator of a propulsion motor of a pod propeller according to an embodiment of the present disclosure, which is suitable for mounting the stator of the propulsion motor of the pod propeller shown in fig. 1 and 2. Referring to fig. 6, the installation method flow may include the following steps.
The propelling motor stator is a hollow cylinder, the cavity is used for mounting the propelling motor stator, and the inner wall of the cavity is in contact with the outer wall of the propelling motor stator.
Exemplarily, the nacelle propeller further comprises at least two first support rings, each first support ring is sleeved on the stator at intervals and clamped between the cavity and the stator, the first support rings are located between the two expansion sleeves, and ventilation holes are formed in the stator between the two adjacent first support rings along the circumferential direction.
The ventilation holes are used for dissipating heat generated when the motor works, and after the heat comes out of the ventilation holes, the heat flows along a flow channel formed by the space between two adjacent first supporting rings and is dissipated to the nacelle shell. The heat is dissipated to the outside by the pod housing.
Optionally, four ventilation holes are arranged on the stator between two adjacent first support rings, and the four ventilation holes are uniformly distributed along the circumferential direction of the stator.
Correspondingly, the pod propeller further comprises at least two second support rings, the number of the first support rings is the same as that of the second support rings, the first support rings correspond to the second support rings one to one, the second support rings are fixed in the cavities at intervals, and the second support rings are sleeved on the corresponding first support rings and clamped between the cavities and the corresponding first support rings.
The first support rings correspond to the second support rings one to one, and after the stator of the motor is axially installed in place, the corresponding first support rings and the second support rings can be completely aligned, so that the flow channel space between the first support rings is further increased.
Based on this, step 601 may further include: when moving the propulsion motor stator into the cavity of the nacelle housing, it is ensured that the corresponding first and second support rings are aligned.
Each of the two expansion sleeves comprises an inner ring, an outer ring and a screw. The inner ring comprises a sleeve body and a flange surface arranged on the outer wall of one end of the sleeve body along the circumferential direction.
And 603, sleeving the outer ring of the expansion sleeve to one end of the stator of the propulsion motor.
And step 604, sleeving the sleeve body of the inner ring of the expansion sleeve between the stator and the outer ring of the propulsion motor.
The end face of the outer ring is opposite to the flange face, and the outer ring is clamped between the sleeve body and the inner wall of the cavity.
Illustratively, the outer surface of the inner ring is conical, and the inner surface of the inner ring is matched with the stator; the inner surface of the outer ring is in a conical shape matched with the outer surface of the inner ring, and the outer surface of the outer ring is matched with the cavity.
Correspondingly, the flange face is arranged on the large end of the inner ring, and the small end of the inner ring is inserted into the outer ring.
And step 605, locking the outer ring and the flange surface by using a screw.
The number of the screws is two or more, and each screw is fixed on the flange face at even intervals.
Step 605 may include: the high-strength screws on the expansion sleeve are uniformly screwed by using a torque wrench according to the principle of diagonal and cross, the screwing method is that each high-strength screw is screwed to 1/4 of rated torque each time, and the screwing sequence is limited by the opening of the inner ring to ensure that the rated torque is reached.
Step 603-step 605 are the installation process of one of the expansion sleeves, and the installation of the two expansion sleeves is completed according to the installation process.
In the embodiment of the disclosure, a propulsion motor stator is moved into a cavity of a pod shell, and then two expansion sleeves are sleeved at two ends of the propulsion motor stator respectively, wherein the two expansion sleeves are respectively clamped between the cavity and the stator; the two expansion sleeves generate enough pressure and friction force between the nacelle shell and the motor stator to realize the fixed connection between the nacelle shell and the motor stator, and the nacelle shell and the motor stator are safe and reliable; the installation process of the expansion sleeve is simple, the stator installation process of the propulsion motor can be simplified, and the product percent of pass is improved; in addition, extra heating and pressurizing equipment is not needed in the installation process, the manufacturing cost is greatly reduced, the product percent of pass is improved, meanwhile, grooves are not needed to be formed in the pod shell and the motor stator, the connected piece is not affected in strength, abrasion is avoided, and the service life is long.
In addition, first support ring and second support ring are mated mutually, can provide the radial support of stator, combine the tight cover of expanding to cooperate the installation: firstly, assembling the motor stator at a proper position of the pod shell, then adjusting the positions of the first support ring and the second support ring, aligning the first support ring with the corresponding second support ring, and then screwing the high-strength screw on the expansion sleeve to eliminate gaps among the support ring of the pod shell, the expansion sleeve and the support ring of the motor stator, thereby completing the connection of the motor stator and the pod shell.
The above description is only exemplary of the present disclosure and is not intended to limit the present disclosure, so that any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (6)
1. A pod thruster, characterized in that it comprises a pod housing (1), a propulsion motor and a propeller,
the propulsion motor comprises a stator (2), a rotor and an output shaft, the stator (2) is a hollow cylinder, a cavity for mounting the stator (2) is arranged in the pod shell (1), the inner wall of the cavity is in contact with the outer wall of the stator (2), the stator (2) is sleeved on the rotor, the rotor is sleeved on the output shaft, the propeller is sleeved on the output shaft and is positioned outside the cavity,
the pod propeller also comprises two expansion sleeves (3), the two expansion sleeves (3) are respectively sleeved at two ends of the stator (2), the two expansion sleeves (3) are respectively clamped between the inner wall of the cavity and the outer wall of the stator (2),
each expansion sleeve (3) of the two expansion sleeves (3) comprises an inner ring (4), an outer ring (5) and a screw (6),
the inner ring (4) is an open ring, the inner ring (4) comprises a sleeve body (41) and a flange surface (42) arranged on the outer wall of one end of the sleeve body (41) along the circumferential direction, the inner ring (4) is provided with a gap extending from the inner edge of the inner ring (4) to the outer edge of the inner ring (4),
the sleeve body is clamped between the stator (2) and the outer ring (5), the outer ring (5) is clamped between the sleeve body (41) and the inner wall of the cavity, the end surface of the outer ring (5) is opposite to the flange surface (42), the outer ring (5) is connected with the flange surface (42) through the screw (6),
the outer surface of a sleeve body (41) of the inner ring (4) is conical, the inner surface of the inner ring (4) is matched with the stator (2), the inner surface of the outer ring (5) is conical matched with the outer surface of the inner ring (4), the outer surface of the outer ring (5) is matched with the cavity,
the flange face (42) is provided with a first through hole penetrating through the flange face (42), the end face of the outer ring (5) opposite to the flange face (42) is provided with a second through hole, the second through hole extends from one end face of the outer ring (5) to the other end face of the outer ring (5), the first through hole is coaxial with the second through hole, the screw (6) is positioned in the first through hole and the second through hole,
the pod propeller further comprises at least two first supporting rings (7), each first supporting ring (7) is sleeved on the stator (2) at uniform intervals and clamped between the cavity and the stator (2), the two expansion sleeves (3) are respectively sleeved on the first supporting rings (7), ventilation holes (8) are formed in the stator (2) between every two adjacent first supporting rings (7) along the circumferential direction,
the outer wall surface of the first supporting ring (7) is provided with an outer flange, a flow passage is formed between the outer flanges of two adjacent first supporting rings (7),
the pod propeller further comprises at least two second support rings (9), the number of the first support rings (7) is the same as that of the second support rings (9), the first support rings (7) correspond to the second support rings (9) one by one, the second support rings (9) are fixed in the cavity at intervals, the second support rings (9) are sleeved on the corresponding first support rings (7) and clamped between the cavity and the corresponding first support rings (7),
the inner wall surfaces of the second support rings (9) are provided with inner flanges, a heat dissipation air channel is formed between the inner flanges of every two adjacent second support rings (9), the inner flanges of the second support rings (9) are opposite to the corresponding outer flanges of the first support rings (7), and the heat dissipation air channels are communicated with the corresponding flow channels.
2. The pod thruster of claim 1, wherein the flange surface (42) is arranged on a large end of the inner ring (4), a small end of the inner ring (4) being inserted in the outer ring (5).
3. The pod thruster of claim 1, wherein the number of the screws (6) is two or more, each screw (6) being fixed to the flange face (42) at regular intervals.
4. The pod thruster of claim 1, wherein four ventilation holes (8) are arranged on the stator (2) between the two adjacent first support rings (7), the four ventilation holes (8) being evenly distributed along the circumference of the stator (2).
5. A method of mounting a propulsion motor stator of a pod propeller, the method comprising:
moving a propulsion motor stator into a cavity of a pod housing, wherein the propulsion motor stator is a hollow cylinder, the cavity is used for mounting the propulsion motor stator, and the inner wall of the cavity is in contact with the outer wall of the propulsion motor stator;
two expansion sleeves are respectively sleeved at two ends of the propulsion motor stator and are respectively clamped between the cavity and the propulsion motor stator,
each of the two expansion sleeves comprises an inner ring, an outer ring and a screw, the inner ring is an open ring, the inner ring comprises a sleeve body and a flange surface arranged on the outer wall of one end of the sleeve body along the circumferential direction, a notch extending from the inner edge of the inner ring to the outer edge of the inner ring is formed in the inner ring, the sleeve body is clamped between the stator and the outer ring, the outer ring is clamped between the sleeve body and the inner wall of the cavity, the end surface of the outer ring is opposite to the flange surface, the outer ring is connected with the flange surface through the screw, the outer surface of the sleeve body of the inner ring is conical, the inner surface of the inner ring is matched with the stator, the inner surface of the outer ring is conical and matched with the outer surface of the inner ring, the outer surface of the outer ring is matched with the cavity, and a first through hole penetrating through the flange surface is formed in the flange surface, the end face of the outer ring opposite to the flange face is provided with a second through hole, the second through hole extends from one end face of the outer ring to the other end face of the outer ring, the first through hole is coaxial with the second through hole, the screw is positioned in the first through hole and the second through hole, the pod propeller further comprises at least two first support rings, each first support ring is sleeved on the stator at even intervals and clamped between the cavity and the stator, the two expansion sleeves are respectively sleeved on the first support rings, the stator between every two adjacent first support rings is provided with a vent along the circumferential direction, the outer wall face of each first support ring is provided with an outer flange, a flow channel is formed between the outer flanges of every two adjacent first support rings, the pod further comprises at least two second support rings, and the number of the first support rings is the same as that of the second support rings, the first support rings correspond to the second support rings one to one, each second support ring is fixed in the cavity at intervals, the second support rings are sleeved on the corresponding first support rings and clamped between the cavity and the corresponding first support ring, inner flanges are arranged on the inner wall surfaces of the second support rings, a heat dissipation air channel is formed between the inner flanges of every two adjacent second support rings, the inner flanges of the second support rings are opposite to the outer flanges of the corresponding first support rings, and the heat dissipation air channels are communicated with the corresponding flow channels.
6. The installation method according to claim 5, wherein each of the two expansion sleeves comprises an inner ring, an outer ring and a screw, the inner ring comprises a sleeve body and a flange surface arranged circumferentially on an outer wall of one end of the sleeve body,
the suit respectively with two bloated tight overlaps to propulsion motor stator's both ends include:
sleeving an outer ring of the expansion sleeve to one end of the propulsion motor stator;
sleeving a sleeve body of an inner ring of the expansion sleeve between the propulsion motor stator and the outer ring, wherein the end surface of the outer ring is opposite to the flange surface, and the outer ring is clamped between the sleeve body and the inner wall of the cavity;
and adopting screws to lock the outer ring and the flange surface.
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| CN202010272703.5A CN111547216B (en) | 2020-04-09 | 2020-04-09 | Pod propeller and mounting method of stator of propelling motor of pod propeller |
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| CN202010272703.5A CN111547216B (en) | 2020-04-09 | 2020-04-09 | Pod propeller and mounting method of stator of propelling motor of pod propeller |
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