Miniature axial flow pump with shielding type structure

Abstract

The utility model discloses a miniature axial flow pump with a shielding type structure, and relates to the technical field of axial flow pumps. The centrifugal pump comprises a pump body assembly, a motor mechanism and an impeller assembly, the pump body assembly comprises a front pump body, a rear pump body and a middle pump body; the motor mechanism comprises a stator assembly and a rotor assembly, the stator assembly and the rotor assembly are coaxially arranged, and a second channel is formed between the stator assembly and the rotor assembly; the impeller assembly comprises a rotor inner blade and a rotor outer blade located outside the rotor shielding sleeve. According to the utility model, the applicability to various working conditions is realized by changing the blade types of the blades in the rotor and adopting various changeable water inlet and outlet modes, the blades are integrated in the rotor main shaft, the volume of the pump is reduced, the first channel between the rotor main shaft and the blades in the rotor and the second channel between the stator assembly and the rotor assembly form two channels, and the efficiency of the pump is improved. And meanwhile, the motor mechanism is completely arranged in the working liquid, so that the heat dissipation performance is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the related technical field of axial flow pump, especially, relate to a shield formula structure micro axial flow pump. BACKGROUND

[0002] The shield pump is a kind of no dynamic seal pump, pump and driving motor are integrated, all are enclosed in a shell filled with conveying medium, and its power is transmitted to rotor by stator electromagnetic field, and rotor operates in the medium being transported.

[0003] The axial flow pump is a kind of pump that liquid is transported along the axial direction by the action force generated by the blade of rotating impeller, the flow of axial flow pump is larger, and flow can be easily changed by changing blade installation angle, and the structure of axial flow pump is simple, but the volume of existing conventional axial flow pump is larger, and power consumption is large, and use cost is high, and the heat generated by motor when operating is not easy to dissipate, to cause motor damage easily, for this purpose, we provide a shield formula structure micro axial flow pump to solve the above technical problems. CONTENT OF UTILITY MODEL

[0004] The utility model discloses a shield formula structure micro axial flow pump, through the specific structural design of pump body assembly, motor mechanism and impeller assembly, the problem in above-mentioned technical background is solved.

[0005] To solve the above technical problems, the utility model is realized through the following technical schemes:

[0006] The utility model discloses a shield formula structure micro axial flow pump, including pump body assembly, motor mechanism and impeller assembly, the motor mechanism is set up in pump body assembly inside, the motor mechanism includes stator assembly and rotor assembly, the stator assembly is fixed in pump body assembly inside, and the coaxial heart is arranged between rotor assembly and stator assembly;The rotor assembly contains rotor spindle, and the rotor spindle is hollow structure;The impeller assembly includes rotor inner blade and rotor outer blade, and the rotor inner blade is coaxial rotation and is arranged in the rotor spindle inside.

[0007] The utility model further is provided with, the pump body assembly includes the end cap, front pump body and intermediate pump body of symmetrical setting, the end cap is sealed and is connected at the both ends of intermediate pump body respectively, the end cap includes through -hole and bearing seat component, the through -hole is set in the axial symmetry center position at front pump body, and the bearing seat component is fixedly connected in through -hole inside.

[0008] The utility model further sets up, bearing seat component includes bearing seat and main bearing, be equipped with bearing seat on the end cover, be equipped with main bearing on the bearing seat, adopt interference fit between main bearing and bearing seat, thereby realize the fixation of main bearing, bearing seat surface is equipped with the through hole that can supply liquid, and the inner wall of main bearing is equipped with spiral channel, main bearing is equipped with thrust bearing in cooperation.

[0009] The utility model further sets up, pump body component is equipped with a plurality of channels, the channel includes the first channel formed by rotor inner blade and rotor spindle and the second channel formed by rotor assembly and stator assembly, the bearing seat is equipped with the communication hole that is linked with the second channel, rotor inner blade and rotor spindle are fixedly connected through triangular support, and there are a plurality of overflow channels at rotor inner blade and rotor spindle junction.

[0010] The utility model further sets up, stator assembly includes stator core and stator shield sleeve, the stator shield sleeve is sleeved at stator core outside, rotor inner blade and rotor spindle are arranged coaxially between, rotor shield sleeve is sleeved at rotor spindle outside, rotor shield sleeve and rotor assembly are fixedly connected between, rotor outer blade is fixed on rotor shield sleeve, the cavity inner wall of intermediate pump body is equipped with the positioning step for stator assembly installation, stator shield sleeve is sleeved at stator assembly outside, stator shield sleeve and stator assembly are fixedly connected between.

[0011] The utility model further sets up, stator assembly is installed at positioning step and is fixedly connected with intermediate pump body, stator assembly is arranged at the radial outer side of rotor assembly, and stator assembly is fixed at the cavity surface stator assembly positioning step of intermediate pump body, and the inner surface of stator assembly and intermediate pump body is closely matched, main bearing is sliding bearing structure, the inner wall of main bearing is equipped with spiral channel that can supply liquid, rotor spindle is equipped with a plurality of thrust bearing that cooperate with main bearing, and mechanical seal assembly is arranged on one side of main bearing.

[0012] The utility model has the advantages of the following:

[0013] 1, the utility model discloses a blade assembly, adopts detachable replacement rotor inner blade, and the setting of multiple seals and water inlet and outlet, greatly increases the work range that it can guarantee.

[0014] 2, the utility model discloses the setting of blade in the shaft, greatly compresses the space needed for arranging axial flow blade of axial flow pump originally, so that the volume of pump is greatly reduced.

[0015] 3. The utility model discloses a double channel formed by the second channel between the stator assembly and the rotor assembly and the first channel between the rotor inner blade and the rotor main shaft, which can improve the lift of the micro axial flow pump.

[0016] 4. The utility model discloses a shielding structure of the pump body assembly and the motor mechanism, which can make the pump flow through the bearing and the motor stator-rotor surface while conveying medium, cool and lubricate the main shaft and the bearing by the medium, and dissipate heat of the whole, so that the heat dissipation capacity of the whole is greatly improved, the working efficiency is improved, and the working life is ensured.

[0017] Of course, any product implementing the utility model does not necessarily need to achieve all the advantages mentioned above. DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0019] Figure 1 It is a longitudinal structure sectional view of a shielding structure micro axial flow pump.

[0020] Figure 2 It is a longitudinal structure sectional view of a shielding structure micro axial flow pump. Figure 1 It is another angle structure schematic view.

[0021] Figure 3 It is a longitudinal structure sectional view of the pump body assembly in the utility model.

[0022] Figure 4 It is a longitudinal structure sectional view of the pump body assembly in the utility model. Figure 3 It is another angle structure schematic view.

[0023] Figure 5 It is a longitudinal structure sectional view of the motor mechanism and the impeller assembly in the utility model.

[0024] Figure 6 It is a longitudinal structure sectional view of the motor mechanism and the impeller assembly in the utility model. Figure 5 It is another angle structure schematic view.

[0025] In the drawings, the component list represented by each sign is as follows:

[0026] 1-pump body assembly, 11-end cover, 111-through hole, 112-bearing seat assembly, 1121-main bearing, 1122-bearing seat, 1123-thrust bearing, 12-front pump body, 2-motor mechanism, 21-stator assembly, 211-stator core, 212-stator shield, 13-intermediate pump body, 22-rotor assembly, 221-rotor main shaft, 222-rotor core, 223-rotor shield, 3-impeller assembly, 31-rotor outer blade, 32-rotor inner blade. DETAILED DESCRIPTION

[0027] 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 fall within the protection scope of the utility model.

[0028] Specific embodiment one, please refer to Figures 1-6 The utility model discloses a shielding structure miniature axial flow pump, including pump body assembly 1, motor mechanism 2 and impeller assembly 3, specifically, motor mechanism 2 sets up in pump body assembly 1 inside, and motor mechanism 2 includes stator assembly 21 and rotor assembly 22, and stator assembly 21 is fixed in pump body assembly 1 inside, and rotor assembly 22 is coaxial with stator assembly 21 and is arranged, and rotor assembly 22 contains rotor main shaft 221, and rotor main shaft 221 is hollow structure, and impeller assembly 3 includes rotor inner blade 31 and rotor outer blade 32, and rotor inner blade 31 is coaxial and is arranged in rotor main shaft 221 inside.

[0029] Further, the pump body assembly 1 is provided with a plurality of channels, the channels include the first channel formed by the rotor inner blade 31 and the rotor main shaft 221 and the second channel formed by the rotor assembly 22 and the stator assembly 21, and the bearing seat 1121 is provided with a communication hole connected with the second channel.

[0030] The operation process of the embodiment is as follows: after the power is turned on, the motor mechanism 2 forms a magnetic field between the rotor assembly 22 and the stator assembly 21, the magnetic field generates a force acting on the rotor assembly 22, so that the rotor assembly 22 rotates at high speed, driving the rotor inner blade 31 and the rotor outer blade 32 to rotate at high speed, entering the first channel through the flow passage between the end cover 11 and the bearing seat assembly 112 via the through hole 111, and the rotor inner blade 31 does work on the liquid in the first channel to increase the pressure energy of the liquid, so that the liquid flows out along the first channel, and a part of the liquid entering the pump body will enter the second channel composed of the stator assembly 21 and the rotor assembly 22, and the liquid will flow out of the second channel after increasing the pressure energy under the work of the rotor outer blade 32, and the work of the first channel and the second channel will obviously improve the efficiency and lift of the whole pump.

[0031] Specific embodiment two, please refer to Figures 1-6 On the basis of the specific embodiment one, specifically, the pump body assembly 1 includes symmetrically arranged end covers 11, a front pump body 12 and an intermediate pump body 13, which are designed into three parts, which is beneficial to the later assembly and disassembly and reduces the later maintenance cost, the end covers 11 are respectively sealed and connected at both ends of the intermediate pump body 13, the end cover 11 includes a through hole 111 and a bearing seat assembly 112, the through hole 111 is arranged at the axisymmetric center position of the front pump body 12, and the bearing seat assembly 112 is fixedly connected inside the through hole 111.

[0032] Further, the bearing seat assembly 112 includes a bearing seat 1121 and a main bearing 1122, the bearing seat 1121 is arranged on the end cover 11, the main bearing 1122 is arranged on the bearing seat 1121, and the main bearing 1122 is fixedly connected with the bearing seat 1121 through interference fit; the bearing seat 1121 is provided with a through hole for the liquid to pass through, and the inner wall of the main bearing 1122 is provided with a spiral channel, so that the conveying medium can lubricate and cool the main bearing 1122, so as to ensure that the temperature of the main bearing 1122 is not too high and the wear is reduced; the main bearing 1122 is matched with a thrust bearing 1123, and the thrust bearing 1123 is arranged in cooperation with the main bearing 1122.

[0033] Further, the rotor inner blade 31 and the rotor main shaft 221 are fixedly connected through the triangular support, the rotor inner blade 31 is a single detachable and replaceable assembly, and a plurality of flow passages are arranged at the connection position of the rotor inner blade 31 and the rotor main shaft 221, so that the conveying medium can smoothly enter the first channel.

[0034] Further, the stator assembly 21 comprises a stator core 211 and a stator shield sleeve 212, the stator shield sleeve 212 is sleeved outside the stator core 211; the rotor inner blade 31 and the rotor main shaft 221 are coaxially arranged, the rotor main shaft 221 is externally sleeved with a rotor shield sleeve 223, the rotor shield sleeve 223 is fixedly connected with the rotor assembly 22, the rotor outer blade 32 is fixed on the rotor shield sleeve 223; the inner wall of the cavity of the intermediate pump body 13 is provided with a positioning step for installing the stator assembly 21, the stator assembly 21 is externally sleeved with the stator shield sleeve 212, the stator shield sleeve 212 is fixedly connected with the stator assembly 21, and the stator assembly 21 needs to be coaxially installed with the rotor main shaft 221.

[0035] Further, the stator assembly 21 is installed at the positioning step and fixedly connected with the intermediate pump body 13, the stator assembly 21 is arranged at the radial outer side of the rotor assembly 22, and the stator assembly 21 is fixed at the stator assembly positioning step on the surface of the cavity of the intermediate pump body 13, the stator assembly 21 and the inner surface of the intermediate pump body 13 are tightly matched; the main bearing 1122 is a sliding bearing structure, the inner wall of the main bearing 1122 is provided with a spiral groove for liquid to pass through, the rotor main shaft 221 is provided with a plurality of thrust bearings matched with the main bearing 1122, and one side of the main bearing 1122 is provided with a mechanical seal assembly; the rotor assembly 22 and the stator assembly 21 are filled with cooling medium, and the internal cavity of the motor stator assembly 21 is completely filled with an insulating material.

[0036] The operation process of the embodiment is as follows: the rotor main shaft 221 is supported on the main bearing 1122, when the rotor main shaft 221 of the pump rotates at high speed, the working medium flowing into the pump body through the through hole 111 will flow through the main bearing 1122, the gap between the rotor main shaft 221 and the rotor assembly 22, and the gap between the rotor assembly 22 and the stator assembly 21, in this way, the self-lubrication of the bearing can be realized, so that the whole pump does not need to add additional lubricating liquid, the purity of the whole working liquid is ensured, at the same time, the heat generated during the working of the pump can be taken away when the liquid flows, which greatly improves the heat dissipation of the bearing and ensures the non-pollution to the working medium. The rotor main shaft 221 is provided with thrust bearings 1123 matched with the main bearing 1122, the thrust bearings can make the axial force generated during the working of the pump not affect the working of the whole pump.

[0037] The first channel formed by the rotor main shaft 221 and the rotor inner blade 31 changes the liquid inlet mode, the connection between the rotor main shaft 221 and the rotor inner blade 31 is set to a completely sealed state, at the same time, uniform distribution of holes for liquid to pass through are arranged on the front and rear end side walls of the rotor main shaft 221, so that more liquid flows through the second channel, thereby taking away more heat, which can make the overall heat dissipation performance of the motor 2 more superior, the detachable connection between the rotor inner blade 31 and the rotor main shaft 221 can make the replacement more convenient and fast when it is suitable for different working conditions.

[0038] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details and limit the present application to the specific embodiments described. Obviously, according to the content of the present specification, many modifications and changes can be made. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that the persons skilled in the art can well understand and utilize the present application. The present application is limited by the claims and the entire scope and equivalents thereof.

Claims

1. A shielded micro axial flow pump, comprising a pump body assembly (1), a motor mechanism (2), and an impeller assembly (3), characterized in that: The motor mechanism (2) is located inside the pump body assembly (1). The motor mechanism (2) includes a stator assembly (21) and a rotor assembly (22). The stator assembly (21) is fixed inside the pump body assembly (1). The rotor assembly (22) and the stator assembly (21) are coaxially arranged. The rotor assembly (22) includes a rotor spindle (221), which is a hollow structure; The impeller assembly (3) includes an inner rotor blade (31) and an outer rotor blade (32), wherein the inner rotor blade (31) is coaxially rotatably disposed inside the rotor main shaft (221).

2. The shielded micro axial flow pump according to claim 1, characterized in that, The pump body assembly (1) includes symmetrically arranged end caps (11), a front pump body (12) and an intermediate pump body (13). The end caps (11) are respectively sealed and connected to both ends of the intermediate pump body (13). The end caps (11) include a through hole (111) and a bearing seat assembly (112). The through hole (111) is opened at the axisymmetric center of the front pump body (12), and the bearing seat assembly (112) is fixedly connected inside the through hole (111).

3. A shielded micro axial flow pump according to claim 2, characterized in that, The bearing housing assembly (112) includes a bearing housing (1121) and a main bearing (1122). The end cover (11) is provided with the bearing housing (1121), and the bearing housing (1121) is provided with the main bearing (1122). The main bearing (1122) and the bearing housing (1121) are fitted with an interference fit to fix the main bearing (1122). The bearing housing (1121) has a through hole on its surface that allows liquid to pass through, and the inner wall of the main bearing (1122) has a spiral channel. The main bearing (1122) is fitted with a thrust bearing (1123).

4. A shielded micro axial flow pump according to claim 3, characterized in that, The pump body assembly (1) is provided with several channels, including a first channel formed by the rotor inner blade (31) and the rotor main shaft (221) and a second channel formed by the rotor assembly (22) and the stator assembly (21). The bearing seat (1121) is provided with a connecting hole that communicates with the second channel.

5. A shielded micro axial flow pump according to claim 4, characterized in that, The rotor inner blade (31) is fixedly connected to the rotor main shaft (221) by a triangular support, and there are several flow channels at the connection between the rotor inner blade (31) and the rotor main shaft (221).

6. A shielded micro axial flow pump according to claim 5, characterized in that, The stator assembly (21) includes a stator core (211) and a stator shield (212), the stator shield (212) being fitted over the stator core (211); The inner blades (31) of the rotor are coaxially arranged with the main shaft (221) of the rotor. The main shaft (221) of the rotor is covered with a rotor shield (223). The rotor shield (223) is fixedly connected to the rotor assembly (22). The outer blades (32) of the rotor are fixed on the rotor shield (223).

7. A shielded micro axial flow pump according to claim 6, characterized in that, The inner wall of the cavity of the intermediate pump body (13) is provided with a positioning step for the installation of the stator assembly (21). The stator assembly (21) is covered with a stator shield (212), and the stator shield (212) is fixedly connected to the stator assembly (21).

8. A shielded micro axial flow pump according to claim 7, characterized in that, The stator assembly (21) is installed at the positioning step and fixedly connected to the intermediate pump body (13). The stator assembly (21) is located on the radial outside of the rotor assembly (22), and the stator assembly (21) is fixed on the cavity surface of the intermediate pump body (13) at the positioning step. The inner surfaces of the stator assembly (21) and the intermediate pump body (13) are tightly fitted together.

9. A shielded micro axial flow pump according to claim 7, characterized in that, The main bearing (1122) is a sliding bearing structure. The inner wall of the main bearing (1122) is provided with a spiral groove for liquid to pass through. The rotor main shaft (221) is provided with a number of thrust bearings that cooperate with the main bearing (1122). A mechanical seal assembly is provided on one side of the main bearing (1122). The rotor assembly (22) and the stator assembly (21) are filled with cooling medium, and the internal cavity of the motor stator assembly (21) is completely sealed with insulating material.

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