Dry-type small submersible electric pump with bearing protection structure

Abstract

The utility model belongs to the technical field of submersible electric pumps, and particularly relates to a dry-type small submersible electric pump with a bearing protection structure, which comprises a motor, the motor is detachably and fixedly connected with a pump head through a connecting frame, parts are convenient to maintain and replace, a rotating shaft is arranged on the motor and extends into a pump body, and a plurality of groups of impellers are arranged on the rotating shaft. The rotating shaft is provided with the guide impeller matched with the impeller in position and shape, the liquid flow speed can be reduced, the speed energy is converted into pressure energy, liquid flowing out of an outlet of the impeller is collected and stably conveyed into the extrusion seat, the bearing assembly is protected through the upper bearing seat and the lower bearing seat, and the bearing assembly is prevented from being damaged. And the anti-disturbance assembly is arranged between the guide vane and the rotating shaft, so that the phenomenon that a rotating part of the pump is collided due to disturbance at the shaft head of the rotating shaft can be effectively avoided, and the undesirable phenomena such as noise and vibration are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of submersible motor pumps, and particularly relates to a dry-type small submersible motor pump with a bearing protection structure. Background Art

[0002] A submersible motor pump is a pump that is immersed in a groundwater well for pumping and transporting water, and is widely used in farmland drainage and irrigation, industrial and mining enterprises, urban water supply and drainage, and sewage treatment, etc. The pump shaft of the existing dry-type small submersible motor pump is a slender shaft, and the shaft head is prone to perturbation, which causes rubbing of the pump rotating parts, resulting in adverse phenomena such as noise and vibration. Moreover, under long-term use or harsh working conditions, the bearings of the electric pump are easily damaged and require maintenance. During the process of disassembling the bearings by the staff, secondary damage to the bearings often occurs, affecting the reliability and life of the product. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a dry-type small submersible motor pump with a bearing protection structure for solving the problems raised in the above background art in view of the existing technical problems.

[0004] In view of this, the utility model provides a dry-type small submersible motor pump with a bearing protection structure, which includes a motor. The motor is detachably and fixedly connected to a pump head through a connecting frame, and the other side of the pump head is detachably and fixedly connected to a volute casing;

[0005] A rotating shaft is arranged on the motor and extends into the pump head. An impeller that rotates with the shaft is arranged on the rotating shaft, and a guide vane with a position and shape adapted to the impeller is arranged on the rotating shaft. An upper bearing housing is arranged between the motor and the connecting frame, and a lower bearing housing is arranged at one end of the rotating shaft away from the volute casing, and the lower bearing housing is detachably and fixedly connected to the motor;

[0006] A bearing assembly is arranged in the upper bearing housing and the lower bearing housing;

[0007] An anti-perturbation assembly is arranged between the guide vane and the rotating shaft.

[0008] In the above technical solution, further, the bearing assembly includes:

[0009] An upper bearing, the inner ring of which is installed on the rotating shaft and the outer ring is installed in the upper bearing housing;

[0010] A lower bearing, the inner ring of which is installed on the rotating shaft and the outer ring is installed in the lower bearing housing.

[0011] In the above technical solution, further, a bearing protection pad is installed between the outer ring of the lower bearing and the lower bearing housing.

[0012] In the above technical solution, further, two threaded disassembly holes are axially opened in the lower bearing housing.

[0013] In the above technical solution, further, the anti-disturbance component includes:

[0014] A bushing is provided between the guide vane and the rotating shaft, and the bushing rotates with the rotating shaft;

[0015] A bearing bush is fixedly installed inside the guide vane;

[0016] An elastic rubber ring is fixed between the guide vane and the bearing bush.

[0017] In the above technical solution, further, an axially penetrating cooling groove is provided on the inner wall of the bearing bush. When the bushing rotates with the rotating shaft and comes into contact and friction with the bearing bush, a liquid film is formed between the bearing bush and the bushing.

[0018] In the above technical solution, further, the mechanical seal is sleeved on the rotating shaft and is located between the upper bearing seat and the connecting frame.

[0019] In the above technical solution, further, a cable assembly is connected to one side of the motor.

[0020] The beneficial effects of the present utility model are as follows:

[0021] 1. An anti-disturbance component is provided between the guide vane and the rotating shaft, which can effectively prevent the disturbance at the shaft head of the rotating shaft, avoid the rubbing of the rotating parts of the pump, and prevent the occurrence of adverse phenomena such as noise and vibration.

[0022] 2. Two threaded disassembly holes are axially provided on the lower bearing seat. When the lower bearing needs to be disassembled, a bolt is used to push against the bearing protection pad through the disassembly hole, so as to axially push out the lower bearing without causing damage to the lower bearing during the process.

[0023] 3. An axially penetrating cooling groove is provided on the inner wall of the bearing bush. When the bushing rotates with the rotating shaft and comes into contact and friction with the bearing bush, a liquid film is formed between the bearing bush and the bushing, which can cool and lubricate the bearing bush and the bushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the present utility model;

[0025] Figure 2 is the present utility model Figure 1 is a partial enlarged view of part A in;

[0026] Figure 3 is the present utility model Figure 1 is a partial enlarged view of part B in;

[0027] The markings in the figure are indicated as follows: 1 - motor, 2 - connecting frame, 3 - pump head, 4 - discharge seat, 5 - rotating shaft, 6 - guide vane, 7 - shaft sleeve, 8 - bearing bush, 9 - elastic rubber ring, 10 - upper bearing housing, 11 - upper bearing, 12 - lower bearing housing, 13 - lower bearing, 14 - bearing protection pad, 15 - threaded disassembly hole, 16 - mechanical seal, 17 - cable assembly. Specific embodiments

[0028] The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application belong to the scope protected by the present application.

[0029] Embodiment 1:

[0030] This embodiment provides a dry-type small submersible electric pump with a bearing protection structure, including:

[0031] A motor 1, the motor 1 is detachably and fixedly connected to the pump head 3 through a connecting frame 2, and the other side of the pump head 3 is detachably and fixedly connected with a discharge seat 4;

[0032] A rotating shaft 5, the rotating shaft 5 is arranged on the motor 1 and extends into the pump head 3, an impeller rotating with the shaft is arranged on the rotating shaft 5, a guide vane 6 with a position and shape adapted to the impeller is arranged on the rotating shaft 5, an upper bearing housing 10 is arranged between the motor 1 and the connecting frame 2, and a lower bearing housing 12 is arranged at one end of the rotating shaft 5 away from the discharge seat 4, and the lower bearing housing 12 is detachably and fixedly connected to the motor 1;

[0033] A bearing assembly, a bearing assembly is arranged in the upper bearing housing 10 and the lower bearing housing 12;

[0034] An anti-disturbance assembly, an anti-disturbance assembly is arranged between the guide vane 6 and the rotating shaft 5.

[0035] It can be seen from this embodiment that the motor 1 is detachably and fixedly connected to the pump head 3 through the connecting frame 2, which is convenient for maintenance and replacement of components. The rotating shaft 5 is arranged on the motor 1 and extends into the pump body 3, and multiple groups of impellers are arranged thereon to achieve the pumping function. A guide impeller 6 with a position and shape adapted to the impeller is arranged on the rotating shaft 5, which can reduce the liquid flow velocity and convert the velocity energy into pressure energy, collect the liquid flowing out of the impeller outlet, and smoothly transport it into the discharge seat 4. The bearing assembly is protected by the upper bearing housing 10 and the lower bearing housing 12. An anti-disturbance assembly is arranged between the guide vane 6 and the rotating shaft 5, which can effectively prevent disturbances at the shaft end of the rotating shaft 5 from causing rubbing of the rotating parts of the pump, and avoid the occurrence of adverse phenomena such as noise and vibration.

[0036] Embodiment 2:

[0037] This embodiment provides a dry - type small submersible electric pump with a bearing protection structure. In addition to including the technical solutions of the above - mentioned embodiment, it also has the following technical features.

[0038] The bearing assembly includes:

[0039] The upper bearing 11, the inner ring of the upper bearing 11 is installed on the rotating shaft 5, and the outer ring is installed in the upper bearing seat 10;

[0040] The lower bearing 13, the inner ring of the lower bearing 13 is installed on the rotating shaft 5, and the outer ring is installed in the lower bearing seat 12.

[0041] It can be seen from this embodiment that the inner ring of the upper bearing 11 is installed on the rotating shaft 5, the outer ring is installed in the upper bearing seat 10, the inner ring of the lower bearing 13 is installed on the rotating shaft 5, and the outer ring is installed in the lower bearing seat 12.

[0042] Embodiment 3:

[0043] This embodiment provides a dry - type small submersible electric pump with a bearing protection structure. In addition to including the technical solutions of the above - mentioned embodiment, it also has the following technical features.

[0044] A bearing protection pad 14 is installed between the outer ring of the lower bearing 13 and the lower bearing seat 12.

[0045] It can be seen from this embodiment that setting the bearing protection pad 14 enhances the protection effect on the lower bearing 13.

[0046] Embodiment 4:

[0047] This embodiment provides a dry - type small submersible electric pump with a bearing protection structure. In addition to including the technical solutions of the above - mentioned embodiment, it also has the following technical features.

[0048] Two threaded disassembly holes 15 are axially provided in the lower bearing seat 12.

[0049] It can be seen from this embodiment that two threaded disassembly holes 15 are axially provided in the lower bearing seat 12. When the lower bearing 13 needs to be disassembled, a bolt is used to top against the bearing protection pad through the disassembly hole, so as to axially push out the lower bearing 13, and the lower bearing 13 will not be damaged during the process.

[0050] Embodiment 5:

[0051] This embodiment provides a dry - type small submersible electric pump with a bearing protection structure. In addition to including the technical solutions of the above - mentioned embodiment, it also has the following technical features.

[0052] The anti - disturbance assembly includes:

[0053] The shaft sleeve 7, a shaft sleeve 7 is arranged between the guide vane 6 and the rotating shaft 5, and the shaft sleeve 7 rotates with the rotating shaft 5;

[0054] The bearing bush 8 is fixedly installed in the guide vane 6;

[0055] Elastic rubber ring 9, an elastic rubber ring 9 is fixed between the guide vane 6 and the bearing bush 8.

[0056] It can be seen from this embodiment that the bearing bush 8 is installed in the guide vane 6, and an elastic rubber ring 9 is fixed between the guide vane 6 and the bearing bush 8 to absorb the vibration caused by the friction between the shaft sleeve 7 and the surroundings, and the impact force of the shaft sleeve 7 on the bearing bush 8. The fixed bearing bush 8 forms a restraint on the radial swing of the shaft sleeve 7, reduces the disturbance amount of the rotating shaft 5, and prevents the impeller on the rotating shaft 5 from rubbing against the guide vane 6.

[0057] Embodiment 6:

[0058] This embodiment provides a dry-type small submersible motor pump with a bearing protection structure. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0059] Axial cooling grooves are formed in the inner wall of the bearing bush 7. When the shaft sleeve 7 rotates with the rotating shaft 5 and comes into contact and friction with the bearing bush 8, a liquid film is formed between the bearing bush 8 and the shaft sleeve 7.

[0060] It can be seen from this embodiment that axial cooling grooves are formed in the inner wall of the bearing bush 7. When the shaft sleeve 7 rotates with the rotating shaft 5 and comes into contact and friction with the bearing bush 8, a liquid film is formed between the bearing bush 8 and the shaft sleeve 7, which can cool and lubricate the bearing bush 8 and the shaft sleeve 7.

[0061] Embodiment 7:

[0062] This embodiment provides a dry-type small submersible motor pump with a bearing protection structure. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0063] The mechanical seal 16 is sleeved on the rotating shaft 5 and is located between the upper bearing seat 10 and the connecting frame 2.

[0064] It can be seen from this embodiment that setting the mechanical seal 16 between the upper bearing seat 10 and the connecting frame 2 can prevent the medium from entering the motor 1 to erode and damage the motor, and improve the stability of the pump.

[0065] Embodiment 8:

[0066] This embodiment provides a dry-type small submersible motor pump with a bearing protection structure. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0067] A cable assembly 17 is connected to one side of the motor 1.

[0068] As can be seen from this embodiment, a cable assembly 17 is connected to one side of the motor 1. The cable assembly 17 has excellent waterproof and insulation properties and is used for power supply and signal transmission.

[0069] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. A dry-type small submersible motor pump with a bearing protection structure, characterized in that, Including: A motor (1), the motor (1) is detachably and fixedly connected to a pump head (3) through a connecting frame (2), and a discharge seat (4) is detachably and fixedly connected to the other side of the pump head (3); A rotating shaft (5), the rotating shaft (5) is arranged on the motor (1) and extends into the pump head (3). An impeller that rotates with the shaft is arranged on the rotating shaft (5), and a guide vane (6) with a position and shape adapted to the impeller is arranged on the rotating shaft (5). An upper bearing seat (10) is arranged between the motor (1) and the connecting frame (2). A lower bearing seat (12) is arranged at one end of the rotating shaft (5) away from the discharge seat (4), and the lower bearing seat (12) is detachably and fixedly connected to the motor (1); A bearing assembly, a bearing assembly is arranged in the upper bearing seat (10) and the lower bearing seat (12); An anti-disturbance assembly, an anti-disturbance assembly is arranged between the guide vane (6) and the rotating shaft (5).

2. The dry small submersible motor pump with a bearing protection structure according to claim 1, characterized in that, The bearing assembly includes: An upper bearing (11), the inner ring of the upper bearing (11) is installed on the rotating shaft (5), and the outer ring is installed in the upper bearing seat (10); A lower bearing (13), the inner ring of the lower bearing (13) is installed on the rotating shaft (5), and the outer ring is installed in the lower bearing seat (12).

3. A dry-type small submersible electric pump with a bearing protection structure according to claim 2, characterized in that, A bearing protection pad (14) is installed between the outer ring of the lower bearing (13) and the lower bearing seat (12).

4. The dry small submersible motor pump with a bearing protection structure according to claim 3, characterized in that, Two threaded disassembly holes (15) are axially opened in the lower bearing seat (12).

5. A dry small submersible electric pump with a bearing protection structure according to claim 4, characterized in that, The anti-disturbance assembly includes: A sleeve (7), a sleeve (7) is arranged between the guide vane (6) and the rotating shaft (5), and the sleeve (7) rotates with the rotating shaft (5); A bearing bush (8), the bearing bush (8) is fixedly installed in the guide vane (6); An elastic rubber ring (9), an elastic rubber ring (9) is fixed between the guide vane (6) and the bearing bush (8).

6. The dry-type small submersible electric pump with a bearing protection structure according to claim 5, characterized in that, Axially penetrating cooling grooves are opened on the inner wall of the bearing bush (8). When the sleeve (7) rotates with the rotating shaft (5) and contacts and rubs against the bearing bush (8), a liquid film is formed between the bearing bush (8) and the sleeve (7).

7. The dry small submersible electric pump with a bearing protection structure according to claim 6, characterized in that, The mechanical seal (16) is sleeved on the rotating shaft (5) and is located between the upper bearing seat (10) and the connecting frame (2).

8. A dry-type small submersible electric pump with a bearing protection structure according to claim 7, characterized in that, A cable assembly (17) is connected to one side of the motor (1).

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