Water guide combination bearing for wet-type motor
By using water-guided combined bearings in wet motors and using the design of support rings, bearing bodies and bearing outer rings, the problems of high design difficulty and cost, seal failure and poor heat dissipation of traditional bearings are solved, and high life and low cost are achieved bearing performance.
Patent Information
- Application Number
- CN202421124471.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-22
AI Technical Summary
The ordinary rolling bearings of traditional wet motors need to be used in combination under high force, which leads to increased design difficulty and cost, and has problems such as seal failure and poor heat dissipation, which increases safety hazards.
Using water guide combined bearings, by installing left and right water guide combined bearings on both ends of the rotor of the wet motor, using the design of support ring, bearing body and bearing outer ring, combined with the over-fitting of the water tank and the cylindrical section to form a water film. To reduce friction and promote heat dissipation.
It realizes the provision of high-life bearings at low cost, avoids lubricant leakage and excessive temperature problems, and improves the safety and efficiency of wet motors.
Smart Images
Figure CN222339134U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of submersible motors, in particular to a water-guided combined bearing for a wet motor. Background Art
[0002] As the application of full-flow pump technology increases, customers' requirements for full-flow pumps have also increased. As the power source of the full-flow pump, the wet motor is a device that converts electrical energy into water energy. Bearings are an important part of the wet motor, used to support the rotor of the motor and withstand the axial force generated by the impeller. Traditional bearings use ordinary rolling bearings. Due to the large force, multiple rolling bearings are required to be used in conjunction, and the outer dimensions of the bearings are large, which will inevitably increase the size of the structural parts connected to it, increase the design difficulty, and due to the increase in the number of bearings, the cost and processing difficulty have increased to varying degrees. Ordinary rolling bearings need to set up a separate oil chamber, fill the oil chamber with lubricating oil or grease, and have strict requirements for sealing. Due to the risk of bearing seal failure and environmental pollution, at least one mechanical seal is often used. Because the bearing is in the oil chamber, it cannot directly exchange heat with the outside medium, and the heat dissipation conditions are poor. In order to prevent major safety accidents such as motor burning, sensors have to be set up to detect the internal conditions of the motor in real time. Utility Model Content
[0003] The utility model aims to remedy the defects of the prior art and provide a water-guided combined bearing for a wet motor.
[0004] The utility model is realized by the following technical solutions:
[0005] A water-guided combined bearing for a wet motor comprises a left water-guided combined bearing and a right water-guided combined bearing, wherein the left water-guided combined bearing and the right water-guided combined bearing are respectively mounted at two ends of a rotor of the wet motor, and the left water-guided combined bearing and the right water-guided combined bearing both comprise a support ring, a bearing body and a bearing outer ring, wherein the support ring is rigidly connected to the iron core of the rotor of the wet motor, the bearing body is fixedly mounted on the support ring, the bearing outer ring of the right water-guided combined bearing is mounted on a water absorption chamber of the wet motor, the bearing outer ring of the left water-guided combined bearing is mounted on a guide vane body of the wet motor, and a plurality of water-passing grooves are arranged on the outer walls of the bearing bodies of the left water-guided combined bearing and the right water-guided combined bearing.
[0006] The bearing body is fixedly mounted on the support ring by means of flat head screws, and the cylindrical section of the bearing body is then tightened by means of set screws.
[0007] The bearing outer rings of the left water-guide combined bearing and the right water-guide combined bearing are respectively mounted on the guide vane body and the water absorption chamber of the wet motor through cylindrical head screw assemblies.
[0008] A gap of 0.5-0.7 mm is provided between the end of the bearing body and the end of the bearing outer ring, and an overfit is adopted between the cylindrical outer ring of the bearing body and the cylindrical inner circle of the bearing outer ring.
[0009] The water grooves of the cylindrical section of the bearing body are parallel to the axis, and the water grooves at the end of the bearing body are distributed along a spiral line.
[0010] When the water groove at the end of the bearing body of the right water-guided combined bearing is viewed from the inside to the outside, the vortex line spreads clockwise, and when the water groove at the end of the bearing body of the left water-guided combined bearing is viewed from the inside to the outside, the vortex line spreads counterclockwise.
[0011] The advantages of the utility model are as follows: the utility model introduces water-guided combined bearings, which are used in pairs and are arranged at both ends of the motor rotor respectively, and can resist the radial force and axial force of the rotor at the same time, and have the advantages of long service life and low cost, and there is no need to specially set up an oil chamber to store lubricating oil or grease to lubricate the bearings, and there is no problem of leakage of lubricating oil or grease, and because it is directly immersed in flowing water, the water in the water tanks in the right bearing body and the left bearing body is in a flowing state, so that the heat generated by the relative rotation between the bearing body and the bearing outer ring is reduced, and the water that absorbs the heat is discharged thereupon, and there is no problem of excessive temperature of the water-guided combined bearing. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is an assembly diagram of a wet motor using a water-guided combined bearing in one embodiment of the utility model;
[0013] Figure 2 is a partial enlarged view of the water-guided combined bearing ( Figure 2a This is an enlarged view of the right water guide combined bearing; Figure 2b It is an enlarged view of the left water guide combined bearing);
[0014] Figure 3 It is the assembly drawing of the water guide assembly in the wet motor;
[0015] Figure 4 A diagram of a rotor for assembling a water-guided bearing body;
[0016] Figure 5 A diagram of the water absorption chamber for assembling the outer ring of the bearing;
[0017] Figure 6 The guide vane diagram for assembling the outer ring of the bearing;
[0018] Figure 7 It is the right bearing body diagram;
[0019] Figure 8 This is the left bearing body diagram.
[0020] Numbers in the figure:
[0021] 1: guide vane body, 2: cylindrical head screw assembly, 3: bearing outer ring, 4: rotor, 4a: support ring, 4b: set screw, 4c: left bearing body, 4d: flat head screw, 4e: right bearing body, 5: runner chamber, 6: stator, 7: water absorption chamber, 8: water trough. DETAILED DESCRIPTION
[0022] like Figure 1-8 As shown, a wet motor water-guided combined bearing includes a left water-guided combined bearing and a right water-guided combined bearing, which are respectively mounted at both ends of a rotor 4 of the wet motor. The wet motor includes a runner chamber 5, a water absorption chamber 7 is provided at one axial end of the runner chamber 5, a guide vane body 1 is provided at the other axial end of the runner chamber 5, and a stator 6 and a rotor 4 are installed inside the runner chamber 5.
[0023] The water-guided combined bearings for the wet motor need to be used in pairs, namely a right water-guided combined bearing and a left water-guided combined bearing. The two water-guided combined bearings have the same function and a simple structure.
[0024] The right water-guided combined bearing comprises a support ring 4a, a right bearing body 4e, and a bearing outer ring 3. The support ring 4a is rigidly connected to the iron core of the rotor 4, and then the right bearing body 4e is installed on the support ring 4a with a flat head screw 4d, and then the cylindrical section of the right bearing body 4e is tightened with a set screw 4b, so that the support ring 4a and the right bearing body 4e rotate together with the rotor 4. The bearing outer ring 3 of the right water-guided combined bearing is installed on the water absorption chamber 7 with a cylindrical head screw assembly 2.
[0025] The left water guide combined bearing comprises a support ring 4a, a left bearing body 4c, and a bearing outer ring 3. The support ring 4a is rigidly connected to the iron core of the motor rotor 4, and then the left bearing body 4c is installed on the support ring 4a with a flat head screw 4d, and then the left bearing body cylindrical section is tightened with a set screw 4b, so that the support ring 4a and the left bearing body 4c rotate together with the motor rotor 4. The bearing outer ring 3 of the left water guide combined bearing is installed on the guide vane body 1 with a cylindrical head screw assembly 2.
[0026] The right bearing body 4e and the left bearing body 4c can be made of a material with high rigidity and wear resistance to restrict radial impact and axial displacement of the rotor axis.
[0027] The right bearing body 4e and the left bearing body 4c are each provided with a water groove 8, wherein the water grooves 8 of the right bearing body 4e and the left bearing body 4c in the cylindrical section are parallel to the axis; the water grooves 8 at the ends of the bearing bodies are distributed according to vortex lines, the difference being that when the right bearing body 4e is viewed from the inside to the outside, the vortex lines diffuse clockwise, while when the left bearing body 4c is viewed from the inside to the outside, the vortex lines diffuse counterclockwise.
[0028] There is a gap of 0.5-0.7mm between the ends of the right bearing body 4e and the left bearing body 4c and the end of the bearing outer ring 3. An overfit is adopted between the outer rings of the cylindrical sections of the right bearing body 4e and the left bearing body 4c and the inner circle of the bearing outer ring 3 to form a water film between the right bearing body 4e, the left bearing body 4c and their respective matching bearing outer rings to reduce friction loss.
[0029] The water in the water grooves 8 at the ends of the right bearing body 4e and the left bearing body 4c is dispersed outward along the vortex lines of the water grooves 8 under the action of the centrifugal force generated by the rotation of the rotor 4, which is beneficial to the formation of water films at the ends of the left and right bearing bodies and the outer rings of the bearings, and prevents foreign matter from entering the interior of the bearings.
[0030] Under the action of the centrifugal force of the end water groove 8, the water in the cylindrical water groove 8 of the right bearing body 4e and the left bearing body 4c needs to be replenished into the right bearing body 4e and the end water groove 8 of the left bearing respectively, so that the water in the entire water groove 8 is in a flowing state, which is convenient for forming a water film between the right bearing body 4e, the left bearing body 4c and their respective matching bearing outer rings 3.
[0031] The water in the water trough 8 in the right bearing body 4e and the left bearing body 4c is in a flowing state, so as to reduce the heat generated by the relative rotation between the bearing body and the bearing outer ring 3, and the water absorbing the heat is discharged therefrom, and there is no problem of excessive temperature of the water-guided combined bearing.
[0032] The water grooves 8 in the right bearing body 4e and the left bearing body 4c are vortex lines, and the water thrown out under the action of centrifugal force has almost no effect on the flow state of water in the entire water pump flow channel.
[0033] The right water guide bearing and the left water guide bearing can resist both the radial force generated by the rotor and the larger axial force generated by the rotor. The bearing has the advantages of long service life and low cost, and does not require a special oil chamber to store lubricating oil or grease to lubricate the bearing, so there is no problem of lubricating oil or grease leakage.
Claims
1. A water-guided combined bearing for a wet motor, characterized in that: It comprises a left water-guided combined bearing and a right water-guided combined bearing, which are respectively mounted on two ends of a rotor of a wet motor, and both comprise a support ring, a bearing body and a bearing outer ring, the support ring is rigidly connected to the iron core of the rotor of the wet motor, the bearing body is fixedly mounted on the support ring, the bearing outer ring of the right water-guided combined bearing is mounted on a water absorption chamber of the wet motor, the bearing outer ring of the left water-guided combined bearing is mounted on a guide vane body of the wet motor, and a plurality of water-passing grooves are arranged on the outer walls of the bearing bodies of the left water-guided combined bearing and the right water-guided combined bearing.
2. A wet motor water-guided combined bearing according to claim 1, characterized in that: The bearing body is fixedly mounted on the support ring by means of flat head screws, and the cylindrical section of the bearing body is then tightened by means of set screws.
3. A wet motor water-guided combined bearing according to claim 1, characterized in that: The bearing outer rings of the left water-guide combined bearing and the right water-guide combined bearing are respectively mounted on the guide vane body and the water absorption chamber of the wet motor through cylindrical head screw assemblies.
4. A wet motor water-guided combined bearing according to claim 1, characterized in that: A gap of 0.5-0.7 mm is provided between the end of the bearing body and the end of the bearing outer ring, and an overfit is adopted between the cylindrical outer ring of the bearing body and the cylindrical inner circle of the bearing outer ring.
5. A wet motor water-guided combined bearing according to claim 1, characterized in that: The water grooves of the cylindrical section of the bearing body are parallel to the axis, and the water grooves at the end of the bearing body are distributed along a spiral line.
6. A wet motor water-guided combined bearing according to claim 5, characterized in that: When the water groove at the end of the bearing body of the right water-guided combined bearing is viewed from the inside to the outside, the vortex line spreads clockwise, and when the water groove at the end of the bearing body of the left water-guided combined bearing is viewed from the inside to the outside, the vortex line spreads counterclockwise.