Multi-stage driving wheel rim sucking and catching equipment

Abstract

The utility model discloses a multi-stage drive rim sucking and catching equipment relates to rim sucking and catching equipment technical field, the multi-stage drive rim sucking and catching equipment includes shell, auxiliary drive subassembly and main drive subassembly, the shell has outer shell and inner shell, outer shell and inner shell enclose to form the diversion chamber, the inner shell is provided with the through cavity, the through cavity is provided with the auxiliary drive subassembly, and the main drive subassembly is provided with the auxiliary drive subassembly and the main drive subassembly. A first water inlet is formed in the side wall of one side of the flow guide cavity and communicates with the flow guide cavity and the through cavity. The auxiliary driving assembly is arranged on the outer side of the shell, communicates with the flow guide cavity and can generate negative pressure to suck water flow into the cavity; the main driving assembly is contained in the through cavity.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of wheel rim suction equipment, especially to a multi-stage driving wheel rim suction equipment. BACKGROUND

[0002] The truss type net cage seawater culture and the gravity type net cage seawater culture are the main ways of the deep sea culture in China at present. After the culture objects are put into the truss type net cage and the gravity type net cage, the culture personnel regularly feed the culture objects in the net cage. When the culture objects in the truss type net cage and the gravity type net cage grow to the expected state, the net cage is fished to transport the culture objects in the net cage to the shore.

[0003] At present, when the multi-stage driving wheel rim suction equipment is used to suck and catch the culture objects in the related technology, since the main driving assembly adopts the shaftless wheel rim type device, the rotating blades installed on the inner side of the rotor are driven to rotate by the rotor rotation of the wheel rim type motor, the suction force is generated when the rotating blades rotate, and the culture objects enter the multi-stage driving wheel rim suction equipment under the action of the suction force. However, since the back pressure of the rotating blades of the wheel rim type device is small, the pressure of the blade surface is large, the seawater away from the blade surface returns to the back of the blade, at this time, the culture objects are hindered by the seawater and cannot smoothly pass through the suction port, so the purpose of suction and catching cannot be achieved, and the working efficiency of the multi-stage driving wheel rim suction equipment is reduced. SUMMARY

[0004] The main purpose of the utility model is to provide a multi-stage driving wheel rim suction equipment, which aims to solve the technical problem of the working efficiency reduction of the multi-stage driving wheel rim suction equipment caused by the vortex in the related technology.

[0005] To achieve the above purpose, the utility model provides a multi-stage driving wheel rim suction equipment, which comprises:

[0006] A shell, which has an outer shell and an inner shell, and the outer shell and the inner shell form a flow guide chamber, the inner shell is provided with a through cavity, a side wall on one side of the flow guide chamber is provided with a first water inlet, and the first water inlet is connected with the flow guide chamber and the through cavity;

[0007] An auxiliary driving assembly, which is arranged on the outer side of the shell, is connected with the flow guide chamber, and can generate negative pressure to suck water flow into the flow guide chamber;

[0008] A main driving assembly, which is accommodated in the through cavity.

[0009] In an embodiment, the auxiliary driving assembly is provided with a second water inlet and a water flow channel, the water flow channel being in communication with the guide chamber and the second water inlet.

[0010] In an embodiment, the auxiliary driving assembly comprises a mounting shell, a driving part and a negative pressure part, one side of the mounting shell being formed with a mounting seat, the second water inlet being formed in the mounting shell, and the water flow channel being in communication with the inner cavity of the mounting shell; the driving part and the negative pressure part are arranged in the mounting seat, the output end of the driving part being in transmission connection with the negative pressure part, and the inner cavity of the negative pressure part and the inner cavity of the mounting shell jointly forming the water flow channel.

[0011] In an embodiment, the mounting shell is provided with a partition plate, the partition plate separating the inner cavity of the mounting shell into a first cavity and a second cavity, the driving part being arranged in the first cavity, and the negative pressure part being arranged in the second cavity, a plurality of water inlets being formed in the side wall of one end of the second cavity, and each of the water inlets being in communication with the second cavity and the guide chamber.

[0012] In an embodiment, the auxiliary driving assembly further comprises a coupling, and two synchronous pulleys sleeved on a synchronous belt, the coupling and the two synchronous pulleys being arranged in the first cavity, one of the synchronous pulleys being sleeved on the output shaft of the driving part, the other synchronous pulley being sleeved on the rotating shaft of the coupling, and the other output end of the coupling being in transmission connection with the negative pressure part.

[0013] In an embodiment, the mounting shell is in sealing connection with the mounting seat; and / or

[0014] The partition plate is in sealing connection with the circumferential wall of the inner cavity of the mounting shell.

[0015] In an embodiment, the main driving assembly comprises a stator, a rotor arranged inside the stator, and a plurality of rotating blades arranged inside the rotor, a plurality of limiting grooves being formed in the stator along the circumference of the stator; the rim capturing device of the multi-stage driving assembly comprises a protection assembly, the protection assembly being provided with a plurality of bosses matched with the limiting grooves, and the slot being in communication with the through cavity, and each of the bosses being inserted into each of the limiting grooves.

[0016] In an embodiment, the protection assembly comprises a first protection cover and a second protection cover, each of the first protection cover and the second protection cover being provided with the slot, the slot being in communication with the through cavity, and the first protection cover being connected with the second protection cover; each of the first protection cover and the second protection cover is provided with a plurality of bosses matched with the limiting grooves, and each of the bosses is inserted into each of the limiting grooves.

[0017] In an embodiment, the first protective cover is provided with a plurality of protrusions along the circumference of the first protective cover, and the second protective cover is provided with a plurality of recesses along the circumference of the second protective cover, each of the protrusions being inserted into one of the recesses.

[0018] In an embodiment, the first protective cover is tapered from one end close to the first opening to the other end away from the first opening, and the second protective cover is tapered from one end close to the rotating blade to the other end away from the rotating blade.

[0019] The technical scheme of the utility model discloses through setting up main drive assembly and auxiliary drive assembly, using the suction force generated by the rotation of the rotating blade in the main drive assembly, the breeding objects around the multi-stage driven rim suction device are wrapped in seawater and enter the inside of the multi-stage driven rim suction device through the shell, and the auxiliary drive assembly is used to generate negative pressure to suck into the flow guide chamber of the multi-stage driven rim suction device, the seawater in the flow guide chamber is sprayed to the middle position of the rotating blade through the first water inlet, and the breeding objects pass through the middle area of the rotating blade under the action of the jet flow of the first water inlet, so that the vortex phenomenon in the middle area of the rotating blade is prevented, and the fishing operation of the breeding objects is completed. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.

[0021] Figure 1 The structural schematic diagram of the multi-stage driven rim suction device provided by the utility model is shown in the figure.

[0022] Figure 2 The sectional structure diagram of the multi-stage driven rim suction device provided by the utility model is shown in the figure.

[0023] Figure 3 The structural schematic diagram of the auxiliary drive assembly provided by the utility model is shown in the figure.

[0024] Figure 4 The top view structural diagram of the auxiliary drive assembly provided by the utility model is shown in the figure.

[0025] Figure 5 The structural schematic diagram of the main drive assembly provided by the utility model is shown in the figure.

[0026] Figure 6 The structural schematic diagram of the protective assembly provided by the utility model is shown in the figure.

[0027] Brief Description of Drawings

[0028] 1000, multi-stage driven rim suction device; 1, shell; 11, flow guide chamber; 111, first water inlet; 12, through cavity; 2, auxiliary driving assembly; 2a, water flow channel; 2b, second water inlet; 21, mounting shell; 211, mounting seat; 212, first containing cavity; 213, second containing cavity; 213a, water inlet hole; 22, driving part; 23, negative pressure piece; 24, shaft coupling; 25, synchronous wheel; 3, main driving assembly; 31, stator; 311, limiting groove; 32, rotor; 33, rotating blade; 4, protection assembly; 41, first protective cover; 42, second protective cover; 43, boss.

[0029] The realization, functional features and advantages of the utility model will be further described in combination with embodiments with reference to the drawings. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0031] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0032] In addition, if the embodiments of the utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the utility model.

[0033] The utility model provides a kind of multi-stage driven rim suction device 1000.

[0034] Referring to Figures 1 to 5 In an embodiment of the present application, the multi-stage driven rim suction device comprises a shell 1, an auxiliary driving assembly 2 and a main driving assembly 3. The shell 1 has an outer shell and an inner shell, and the outer shell and the inner shell form a flow guide chamber 11. The inner shell is provided with a through cavity 12. The sidewall of the flow guide chamber 11 is provided with a first water inlet 111. The first water inlet 111 is connected to the flow guide chamber 11 and the through cavity 12. The auxiliary driving assembly 2 is arranged on the outer side of the shell 1. The auxiliary driving assembly 2 is connected to the flow guide chamber 11 and can generate negative pressure to suck water into the flow guide chamber 11. The main driving assembly 3 is accommodated in the through cavity 12.

[0035] In this embodiment, the multi-stage driven rim suction device 1000 is applied to a deep-sea aquaculture net cage scene. The shell 1 is used to provide structural support, and the flow guide chamber 11 is used to guide the flow of water to ensure that the water flow can smoothly enter and flow. It can be understood that the first water inlet 111 is arranged on the sidewall of the flow guide chamber 11 near the water inlet direction of the multi-stage driven rim suction device 1000, which is used to concentrate the marine objects by jet action, so as to avoid vortex near the rotating blade and improve the fishing effect of the marine object. Correspondingly, the first water inlet 111 is arranged in a U shape, which is not limited here. It can be understood that the main driving assembly 3 can be a shaftless rim structure here. Correspondingly, the outer shell of the shell 1 protrudes to form a mounting table. The auxiliary driving assembly 2 is provided with a through hole on one side. The mounting table is provided with a threaded hole at the corresponding position. The screw passes through the through hole and the threaded hole to lock and fix. The mounting table and the auxiliary driving assembly 2 are sealed by filling epoxy resin. The auxiliary driving assembly 2 is used to increase the pressure of seawater by doing work on seawater. The seawater after work is in a high-pressure state, so as to introduce water flow into the flow guide chamber. Further, when the rotating blade 33 in the main driving assembly 3 rotates to generate suction force, the seawater around the suction marine object port of the multi-stage driven rim suction device and the marine objects are sucked into the multi-stage driven rim suction device. At the same time, the seawater outside is sucked into the flow guide chamber 11 by the negative pressure generated by the auxiliary driving assembly 2, and then flows to the through cavity 12 and the main driving assembly 3 through the first water inlet 111. Further, under the action of the rotating blade 33 and the water flow of the first water inlet 111, the marine objects pass through the inner shell of the multi-stage driven rim suction device from the water flow direction, and finally leave the multi-stage driven rim suction device. The other end of the multi-stage driven rim suction device is connected with the ship cabin, which can be connected by pipeline and the like. Further, in order to ensure the sealing, the pipeline also needs to be sealed.

[0036] The technical scheme of the utility model discloses a main drive assembly 3 and an auxiliary drive assembly 2 are set, the suction force is produced by the rotation of the rotating blade 33 in the main drive assembly 3, the breeding object around the multi-stage driven rim suction trapping equipment is wrapped by seawater and enters the inside of the multi-stage driven rim suction trapping equipment through the shell 1, and the negative pressure is produced by the auxiliary drive assembly 2 to suck into the flow guide chamber 11 of the multi-stage driven rim suction trapping equipment, the seawater in the flow guide chamber 11 is sprayed to the middle position of the rotating blade through the first water inlet 111, and the breeding object passes through the middle area of the rotating blade 33 under the action of the jet flow of the first water inlet 111, so that the vortex phenomenon in the middle area of the rotating blade 33 is prevented, and the fishing operation of the breeding object is completed.

[0037] In an embodiment of the utility model, the auxiliary drive assembly 2 is provided with a second water inlet 2b and a water flow channel 2a, and the water flow channel 2a is connected with the flow guide chamber 11 and the second water inlet 2b.

[0038] In the embodiment, the auxiliary drive assembly 2 is provided with a water inlet pipeline on one side, a plurality of notches are formed in the circumferential direction of the water inlet pipeline, the notches are connected with each other to form the second water inlet 2b, and the inner cavity of the water inlet pipeline is connected with the water flow channel 2a. Correspondingly, the shape of the second water inlet 2b includes but is not limited to a circular shape, an elliptical shape and the like. It can be understood that the plurality of notches enable water to enter the water inlet pipeline from multiple directions at the same time; in order to prevent small breeding objects and small shrimps from entering the multi-stage driven rim suction trapping equipment from the notches, the size of the notches is smaller than that of conventional notches, and the notches are in the form of long and narrow rectangular holes. When the auxiliary drive assembly generates negative pressure, the seawater around the water inlet pipeline is sucked into the water flow channel 2a of the auxiliary drive assembly through the notches of the water inlet pipeline. The above-mentioned setting mode improves the uniformity of water flow, and simultaneously, due to the design of the plurality of notches, the speed difference of water flow entering the water flow channel 2a is effectively reduced, the turbulence and resistance caused by the uneven flow rate are reduced, and the water flow resistance is reduced.

[0039] In an embodiment of the utility model, the auxiliary drive assembly 2 includes a mounting shell 21, a drive part 22 and a negative pressure part 23, one side of the mounting shell 21 is formed with a mounting seat 211, the second water inlet 2b is formed in the mounting shell 21, and the water flow channel 2a is connected with the inner cavity of the mounting shell 21; the drive part 22 is arranged in the mounting seat 211, and the inner cavity of the negative pressure part 23 and the inner cavity of the mounting shell 21 form the water flow channel 2a.

[0040] In combination with Figure 2 and Figure 3In the embodiment, the driving part 22 is used for driving the negative pressure part 23 to rotate, and the driving part 22 is in the form of a driving motor and the like, and preferably is a driving motor. The negative pressure part 23 includes, but is not limited to, an auger pump, a gear pump, a piston pump and the like capable of providing a high-pressure water flow, and is not limited herein. Taking the gear pump as an example, the auxiliary driving assembly 2 is formed with an intake cavity and an exhaust cavity in communication with each other, and two gears are arranged on the bottom wall of the auxiliary driving assembly 2. When the gears rotate, the volume of the intake cavity increases, a negative pressure is generated, and the water flow is sucked in. As the gears continue to rotate, the water flow is brought into the exhaust cavity, at this time, the volume of the exhaust cavity decreases, the pressure increases, and finally the water flow is pushed out. The negative pressure part 23 can also be in the form of an auger pump. It can be understood that the auger 23 and the driving part 22 are installed on opposite sides of the mounting shell 21, the driving part 22 is connected with the mounting shell 21 by means of bolt connection, and the auger 23 is clamped with the side wall of the mounting shell 21. Under the driving of the driving part 22, the auger 23 starts to rotate, a negative pressure is generated, seawater around the auxiliary driving assembly 2 enters the cavity where the auger 23 is located through the water inlet pipeline, and then passes through the water flow channel 2a to the flow guide cavity 11. Correspondingly, the connection relationship between the auxiliary driving assembly 2 and the shell 1 includes, but is not limited to, a pipeline connection mode, and preferably is a pipeline connection mode. Taking the pipeline connection as an example, one side of the auxiliary driving assembly 2 is provided with a water outlet pipeline, the water outlet pipeline is arranged at one end of the mounting shell 21 close to the breeding object inlet, and the inner cavity of the water outlet pipeline is in communication with the flow guide cavity 11 and the water flow channel 2a. The water outlet pipeline is connected with the mounting shell 21 and the outer shell of the shell 1 by welding respectively. The above-mentioned arrangement mode can effectively guide and push the water flow, enhances the drainage capacity, and improves the water flow efficiency.

[0041] In an embodiment of the utility model, mounting shell 21 is equipped with the baffle, baffle divides mounting shell 21's inner chamber into first chamber 212, second chamber 213, driving part 22 is contained in first chamber 212, negative pressure part 23 is contained in second chamber 213, second chamber 213 is close to the end side wall of water outlet pipeline and is equipped with a plurality of water inlet holes 213a, each water inlet hole 213a is communicated with second chamber 213 and flow guide cavity 11.

[0042] In combination Figure 4 In the embodiment, it can be understood that the first chamber 212 is sealed by a sealing ring between the first chamber 212 and the second chamber 213 to avoid water inflow, and the material of the sealing ring includes, but is not limited to, fluorine rubber, polytetrafluoroethylene and the like. Correspondingly, the arrangement of the water inlet hole 213a enables the water flow to enter the flow guide cavity 11 uniformly through the holes to reduce the aggregation and uneven distribution of the water flow. Further, the negative pressure part 23 is made of stainless steel, and the above-mentioned arrangement optimizes the water flow guidance, avoids corrosion and wear of other parts of the auxiliary driving assembly 2 by the water flow, and prolongs the service life of the equipment.

[0043] In an embodiment of the utility model, auxiliary drive assembly 2 still includes shaft coupling 24, two synchronous pulleys 25 of sleeve joint in synchronous belt, shaft coupling 24, two synchronous pulleys 25 are housed in first cavity 212, and the output shaft of drive part 22 is sleeve joint with one synchronous pulley 25, and another synchronous pulley 25 is sleeve joint with the rotating shaft of shaft coupling 24, and another output end of shaft coupling 24 is transmission connection with negative pressure piece 23.

[0044] In combination Figure 3 And Figure 4 In the embodiment, the negative pressure piece adopts the form of a screw conveyor pump, in order to further efficiently transmit power and avoid sliding or jumping phenomenon in power transmission, the shaft coupling 24, the synchronous pulley 25 and the synchronous belt are arranged to cooperate with each other. Correspondingly, the negative pressure piece 23 and one end of the shaft coupling 24 are provided with a first boss and a flat key, which are embedded in the shaft coupling 24 to bear the force from the shaft coupling 24. At the same time, a sliding bearing is also provided between the negative pressure piece 23 and the shaft coupling 24, and is sealed by a small frame oil seal. Further, the negative pressure piece is preferably in the form of a screw conveyor at this point. In order to facilitate the connection of the screw conveyor and other components, the screw conveyor and the shaft coupling are formed with a first boss and a flat key at the connection position, and the shaft coupling is correspondingly provided with a structure matched with the first boss and the flat key, so that the screw conveyor is embedded in the shaft coupling to bear the force from the shaft coupling. The second boss and the third boss are also provided on one end of the peripheral wall of the screw conveyor close to the first boss, and the third boss is arranged on the second boss. The second boss is used to install a small frame oil seal, and the third boss is used to radially support a small sliding bearing. In order to prevent the small sliding bearing and the small frame oil seal from moving axially, the screw conveyor is also provided with a fourth boss at one end close to the third boss. Specifically, the helical blades of the screw conveyor can promote the surrounding seawater to flow to the auxiliary drive assembly when rotating. It can be understood that the power of the drive part 22 is transmitted to the negative pressure piece 23 through synchronous belt transmission, and the negative pressure piece 23 rotates. At this time, seawater will enter the second cavity 213 through the second water inlet 2b into the flow guide chamber 11, and be sprayed to the middle region of the rotating blades of the main drive assembly through the first water inlet 111. The cultivation object passes through the middle region of the rotating blades under the action of the jet flow.

[0045] In an embodiment of the utility model, the mounting shell 21 is sealingly connected with the mounting seat 211; and / or the partition plate is sealingly connected with the inner cavity peripheral wall of the mounting shell 21.

[0046] In the embodiment, in combination with the above embodiment, in order to avoid the corrosion of seawater on the structure in the negative pressure guide assembly, the installation shell 21 and the mounting seat 211 are sealed by epoxy resin, and the cavity peripheral wall of the partition plate and the installation shell 21 is sealed by a sealing ring. Correspondingly, the lower shell of the installation shell 21, i.e., the mounting seat 211, is provided with a sealing groove, and the sealing ring is fixed to the bottom wall of the sealing groove by adhesion. The above arrangement helps to protect the internal components in the installation shell 21 from corrosion and improves the sealing performance.

[0047] In an embodiment of the utility model, the main drive assembly includes a stator 31, a rotor 32 arranged inside the stator 31, and a plurality of rotating blades 33 arranged inside the rotor 32, and the stator 31 is provided with a plurality of limiting grooves 311 along the circumference of the stator 31; the multi-stage driven rim suction device further includes a protection assembly 4, the protection assembly 4 is provided with a plurality of bosses 43 with slots that are matched with the limiting grooves 311, the slots are communicated with the cavity 12, and each boss 43 is inserted into each limiting groove 311.

[0048] In combination Figure 2 In the embodiment, in order to protect the cultured objects from being hurt during the operation of the main drive assembly 3, the protection assembly 4 is arranged inside the main drive assembly 3 and covers the rotating blades 33 of the main drive assembly 3. Correspondingly, the rotor 32 of the main drive assembly is provided with a plurality of grooves, permanent magnets are arranged in the grooves, and the rotor 32 is further provided with a rotor cover plate, and coils are arranged on the stator 31. When the coils are electrified, the coils and the permanent magnets generate magnetic force, the permanent magnets drive the rotor 32 to rotate, and the rotating blades, the inner wall of the rim, and the rotor 32 are connected by welding. When the rotor 32 rotates, the rotating blades rotate, the rotating blades generate suction force during rotation, and the cultured objects in the deep-sea net cage enter the multi-stage driven rim suction device under the action of the suction force. The rotor 32 and the rotor cover plate are made of ordinary steel, and the permanent magnets are made of magnetic material. Further, the main drive assembly is provided with a skeleton oil seal outside the rotor 32, and the stator 31 is provided with a sealing ring outside. It can be understood that the protection assembly 4 is used to protect the cultured objects from being hurt by the rotating blades 33. Here, the protection assembly 4 is preferably in the form of a protective cover, and the types of the protection assembly 4 include but are not limited to mesh and porous, and here, the mesh funnel structure is preferred, and stainless steel or other seawater corrosion-resistant materials are used, which is not limited here. The slot is used for water passing, and the shape of the slot is not limited. Correspondingly, the protection assembly 4 is provided with a plurality of bosses 43 at one end close to the rim without shaft, each boss 43 is arranged along the edge peripheral wall of the protection assembly 4, the stator 31 of the main drive assembly is provided with a plurality of limiting grooves 311 at one end close to the protection assembly 4, and each boss 43 can be embedded in one limiting groove 311. The above arrangement protects the cultured objects from being hurt by the rotating blades 33.

[0049] In an embodiment of the utility model, protection assembly 4 includes first protection cover 41 and second protection cover 42, first protection cover 41 with second protection cover 42 all are set with notched, notched intercommunication cavity 12, first protection cover 41 with second protection cover 42 are connected, first protection cover 41, second protection cover 42 are set with multiple bosses 43 of with each limit slot 311 is adapted respectively, each boss 43 with each limit slot 311 is inserted.

[0050] In combination Figure 2 And Figure 5 In the embodiment, the first protection cover 41 and the second protection cover 42 are used for protecting the breeding objects from being injured by the rotating blades 33. Correspondingly, the first protection cover 41 and the second protection cover 42 can be connected by means of bolts, clamps, inserts and the like. The specific implementation is shown as follows. The above arrangement improves the strength and stability of the protection assembly 4, and better prevents the breeding objects from being injured.

[0051] In an embodiment of the utility model, first protection cover 41 is set with multiple bosses along the circumference of first protection cover 41, and second protection cover 42 is set with multiple recesses along the circumference of second protection cover 42. Each boss is inserted with a recess.

[0052] In the embodiment, in order to prevent the protection assembly 4 from generating large disturbance, the first protection cover 41 and the second protection cover 42 are respectively provided with bosses and recesses, so that they are limited after being connected. Further, the first protection cover 41 is set with multiple bosses and multiple recesses along the circumference of the first protection cover 41, and one recess is set between the adjacent two bosses. The second protection cover 42 is set with multiple recesses and multiple bosses along the circumference of the second protection cover 42, and one boss is set between the adjacent two recesses. The bosses of the first protection cover 41 are adapted with the recesses of the second protection cover 42, and the recesses of the first protection cover 41 are adapted with the bosses of the second protection cover 42. The above arrangement improves the stability of the connection, so that the external impact or vibration can be evenly distributed on multiple connection points, the bearing pressure of a single connection point is reduced, the impact resistance is improved, and the insert connection facilitates assembly and disassembly, which is helpful for later maintenance.

[0053] In an embodiment of the utility model, the shape of the first protection cover 41 gradually shrinks from one end close to the first opening to one end away from the first opening; and the shape of the second protection cover 42 gradually expands from one end close to the rotating blades 33 to one end away from the rotating blades 33.

[0054] In the embodiment, it can be understood that the gradually-contracted arrangement of the first protective cover 41 helps to reduce the flow resistance of the fluid and guide the water flow to pass through the main drive assembly; and the gradually-expanded arrangement of the second protective cover 42 can reduce the turbulent flow of the water flow and help to reduce the flow resistance. The two are matched to form a through cavity 12 with a gradually-changing channel. The above arrangement avoids sharp changes in flow rate and makes the fluid flow more stable.

[0055] The above merely describes the exemplary embodiments of the utility model, and does not limit the patent scope of the utility model, and any equivalent structural transformation made by using the utility model specification and the drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the utility model.

Claims

1. A multi-stage driven rim suction apparatus, characterized in that, The multi-stage driven rim suction device comprises: a shell (1) having an outer shell and an inner shell, the outer shell and the inner shell enclosing a flow guide chamber (11), the inner shell being provided with a through cavity (12), a side wall of one side of the flow guide chamber (11) being provided with a first water inlet (111) communicating the flow guide chamber (11) and the through cavity (12); an auxiliary driving assembly (2) provided outside the shell (1), the auxiliary driving assembly (2) communicating the flow guide chamber (11) and capable of generating negative pressure to suck water flow into the flow guide chamber (11); a main driving assembly (3) accommodated in the through cavity (12).

2. The multi-stage driven rim suction apparatus of claim 1, wherein, The auxiliary driving assembly (2) is provided with a second water inlet (2b) and a water flow channel (2a), the water flow channel (2a) communicating the flow guide chamber (11) and the second water inlet (2b).

3. The multi-stage driven rim suction apparatus of claim 2, wherein, The auxiliary driving assembly (2) comprises a mounting shell (21), a driving part (22) and a negative pressure part (23), one side of the mounting shell (21) being formed with a mounting seat (211), the mounting shell (21) being provided with the second water inlet (2b) therein, the water flow channel (2a) communicating the inner cavity of the mounting shell (21); the driving part (22) being provided in the mounting seat (211), an output end of the driving part (22) being in transmission connection with the negative pressure part (23), the inner cavity of the negative pressure part (23) and the inner cavity of the mounting shell (21) enclosing the water flow channel (2a).

4. The multi-stage driven rim suction apparatus of claim 3, wherein, The mounting shell (21) is provided with a partition plate, the partition plate separating the inner cavity of the mounting shell (21) into a first cavity (212) and a second cavity (213), the driving part (22) being accommodated in the first cavity (212), the negative pressure part (23) being accommodated in the second cavity (213), a side wall of one end of the second cavity (213) being provided with a plurality of water inlets (213a), each of the water inlets (213a) communicating the second cavity (213) and the flow guide chamber (11).

5. The multi-stage driven rim suction apparatus of claim 4, wherein, The auxiliary driving assembly (2) further comprises a shaft coupling (24) and two synchronous pulleys (25) sleeved on a synchronous belt, the shaft coupling (24) and the two synchronous pulleys (25) being accommodated in the first cavity (212), one of the synchronous pulleys (25) being sleeved on an output shaft of the driving part (22), the other synchronous pulley (25) being sleeved on a rotating shaft of the shaft coupling (24), the other output end of the shaft coupling (24) being in transmission connection with the negative pressure part (23).

6. The multi-stage driven rim suction apparatus of claim 5, wherein, The mounting shell (21) and the mounting seat (211) are in sealed connection; and / or The partition plate and the circumferential wall of the inner cavity of the mounting shell (21) are in sealed connection.

7. The multi-stage driven rim suction apparatus of any one of claims 1 to 6, wherein, The main drive assembly comprises a stator (31), a rotor (32) arranged inside the stator (31), and a plurality of rotating blades (33) arranged inside the rotor (32), the stator (31) is provided with a plurality of limiting grooves (311) along the circumference of the stator (31); the multi-stage driven rim trapping device comprises a protection assembly (4), the protection assembly is provided with a plurality of bosses (43) with notches matched with the limiting grooves (311), the notches are communicated with the through cavity, and the bosses (43) are inserted with the limiting grooves (311).

8. The multi-stage driven rim suction apparatus of claim 7, wherein, The protection assembly (4) comprises a first protective cover (41) and a second protective cover (42), the first protective cover (41) and the second protective cover (42) are both provided with the notches communicated with the through cavity (12), and the first protective cover (41) is connected with the second protective cover (42); the first protective cover (41) and the second protective cover (42) are respectively provided with a plurality of bosses (43) matched with the limiting grooves (311), and the bosses (43) are inserted with the limiting grooves (311).

9. The multi-stage driven rim suction apparatus of claim 8, wherein, The first protective cover (41) is provided with a plurality of protrusions along the circumference of the first protective cover (41), the second protective cover (42) is provided with a plurality of recesses along the circumference of the second protective cover (42), and each protrusion is inserted with a recess.

10. The multi-stage driven rim suction apparatus of claim 9, wherein, The shape of the first protective cover (41) is gradually contracted from one end close to the first opening to one end away from the first opening; and the shape of the second protective cover (42) is gradually expanded from one end close to the rotating blade (33) to one end away from the rotating blade (33).

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