Rotary self-balancing structure suitable for single-blade sewage pump rotor system

Abstract

The utility model relates to a rotating self-balancing structure suitable for a single-blade sewage pump rotor system. The rotating self-balancing structure comprises an impeller body, a magnetic steel bag, a key, a mechanical seal, a pump rear gland, a bearing, a bearing seat, a bearing gland and a shaft. The impeller body is connected with the shaft through a key and realizes transmission; the mechanical seal is arranged on a mechanical seal seat of the pump rear gland and is pressed by an impeller hub; the bearing is mounted on the bearing seat and is pressed by the bearing gland; the magnetic steel bags are symmetrically, circumferentially and evenly distributed and embedded in the outer edge of a rear cover plate of the impeller body and the position of a pump rear gland support, and one face of each magnetic steel bag makes direct contact with a working medium. By utilizing the characteristic that a single-blade impeller is non-uniform in stress, combining with the change of pressure of a gap between opening rings and applying the characteristic principle that magnetic poles attract and repel, not only are the problems of clamping, friction, vibration and the like caused by eccentric rotation of the impeller body solved, but also the service life of a mechanical seal and a bearing can be effectively prolonged.

Description

Technical Field

[0001] This utility model relates to a rotational self-balancing structure, specifically a rotational self-balancing structure applicable to single-blade sewage pump rotor systems that can adaptively address the eccentricity problem generated during the rotation of a single-blade sewage pump rotor system. Background Technology

[0002] Single-blade impeller pumps are widely used in municipal sewage discharge, waste, slag, and wastewater treatment in factories and pumping stations due to their strong flow capacity and anti-winding function. However, their asymmetrical blade arrangement can lead to uneven distribution of the working medium in the flow channel, causing uneven axial and circumferential forces on the rotor system during operation, resulting in eccentric operation. Eccentricity not only causes impeller body rotation jamming and vibration, but also accelerates the wear and damage of bearings and mechanical seals, making the maintenance cycle of the pump rotor system shorter and the maintenance cost higher. Utility Model Content

[0003] To address the aforementioned problems, the main objective of this invention is to provide a self-balancing rotational structure suitable for single-blade sewage pump rotor systems that can adaptively address the eccentricity issue generated during the rotation of a single-blade sewage pump rotor system.

[0004] This utility model solves the above-mentioned technical problems through the following technical solution: a rotary self-balancing structure suitable for a single-blade sewage pump rotor system, the rotary self-balancing structure suitable for a single-blade sewage pump rotor system includes: an impeller body, a magnet sleeve, a key, a mechanical seal, a pump rear cover, a bearing, a bearing seat, a bearing cover, and a shaft; the impeller body is connected to the shaft via a key to achieve transmission; the mechanical seal is installed on the mechanical seal seat of the pump rear cover and is pressed by the impeller hub; the bearing is installed on the bearing seat and is pressed by the bearing cover; the magnet sleeve is symmetrically, circumferentially, and evenly embedded in the outer edge of the rear cover plate of the impeller body and the pump rear cover bracket, one side of the magnet sleeve is in direct contact with the working medium.

[0005] In a specific embodiment of this utility model, the magnetic steel package includes: a slider connecting rod, a spring, a power supply, a two-way switch, a coil, a conductive rigid body, and a base.

[0006] The base is an outer block structure, and all other parts are embedded in the base; a piston cylinder is installed inside the base.

[0007] The slider connecting rod consists of a middle rod and sliders at the top and bottom ends. The middle rod and the sliders at the top and bottom ends are welded together to form the slider connecting rod.

[0008] One of the sliders in the slider linkage is fixedly connected to the spring and placed together in the piston cylinder, and has the function of sliding up and down; the same slider in the slider linkage is fixedly connected to the two-way switch, and the spring and the two-way switch are located on different surfaces of the two-way switch. When the slider slides up, the two-way switch moves with the slider; the coil is wound on the conductive rigid body.

[0009] In a specific embodiment of this utility model, during the movement of the slider, while disconnecting power supply D1, power supply D2 is closed, so that the coil remains energized and the direction of current flow in the coil is changed.

[0010] In a specific embodiment of this utility model, one of the sliders in the slider connecting rod is connected to the spring by welding and placed together in the piston cylinder.

[0011] In a specific embodiment of this utility model, the same slider in the slider linkage is fixedly connected to the bidirectional switch by welding.

[0012] The positive and progressive effects of this utility model are as follows: Compared with common technologies, the self-balancing rotary structure of the rotor system of a single-vane sewage pump provided by this utility model has the following advantages: When the hydraulic pressure between the impeller body and the pump rear cover support changes, the hydraulic pressure drives the slider linkage mechanism to move up and down, the bidirectional switch switches the power supply, and the direction of the current in the coil is continuously changed. According to the principle of magnetic effect of current, the conductive rigid body will be magnetized in the energized coil and generate N-S polarity, and the constantly changing current direction realizes the uninterrupted transformation of the N-S poles of the conductive rigid body; by installing the magnets in a symmetrical, circumferential, and uniformly distributed manner, the impeller body, under the combined action of the attraction and repulsion magnetic forces at different positions, gradually corrects the axial and circumferential rotational eccentricity problem of the rotor system, and finally realizes the rotational self-balancing of the rotor system of the single-vane pump under the full flow condition. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a partial schematic diagram of the installation position of the magnet packing.

[0015] Figure 3 shows the axial installation position of the magnet pack on the impeller side.

[0016] Figure 4 This is a schematic diagram of the magnetic steel bag structure.

[0017] The following are the names corresponding to the reference numerals in this utility model:

[0018] Impeller body 1, magnet housing 2, key 3, mechanical seal 4, pump back cover 5, bearing 6, bearing seat 7, bearing cover 8, shaft 9, medium 10; slider connecting rod 2-1, spring 2-2, power supply 2-3, two-way switch 2-4, coil 2-5, conductive rigid body 2-6, base body 2-7. Detailed Implementation

[0019] The preferred embodiments of this utility model are given below with reference to the accompanying drawings to illustrate the technical solution of this utility model in detail.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention, as shown below. Figure 1 As shown, this utility model proposes a rotary self-balancing structure suitable for the rotor system of a single-blade sewage pump. The rotary self-balancing structure for the rotor system of a single-blade sewage pump includes: an impeller body 1, a magnet shroud 2, a key 3, a mechanical seal 4, a rear cover 5, a bearing 6, a bearing seat 7, a bearing cover 8, and a shaft 9. The impeller body 1 is connected to the shaft 9 via the key 3 to achieve transmission. The mechanical seal 4 is installed on the mechanical seal seat of the rear cover 5 and is pressed by the impeller hub. The bearing 6 is installed on the bearing seat 7 and is pressed by the bearing cover 8. The magnet shroud 2 is symmetrically, circumferentially, and evenly embedded in the outer edge 101 of the rear cover plate of the impeller body 1 and the rear cover bracket 501. One side of the magnet shroud 2 is in direct contact with the working medium.

[0021] The magnet pack 2 in this utility model includes: a slider connecting rod 2-1, a spring 2-2, a power supply 2-3, a two-way switch (K1, K2) 2-4, a coil 2-5, a conductive rigid body 2-6, and a base 2-7. The power supply 2-3 includes power supply D1 and power supply D2. The base is an outer block structure, with all other parts embedded within the base 2-7. A piston cylinder 2-8 is located within the base 2-7. The slider connecting rod 2-1 includes a middle rod and sliders at the top and bottom ends, which are welded together to form the slider connecting rod 2-1. One slider in the slider connecting rod 2-1 is fixedly connected to a spring 2-2 and placed within the piston cylinder 2-8, providing vertical sliding functionality. Another slider in the slider connecting rod 2-1 is fixedly connected to a two-way switch 2-4. The spring 2-2 and the two-way switch 2-4 are located on different surfaces of the two-way switch 2-4. When the slider slides upwards, the two-way switch 2-4 moves along with the slider. A coil 2-5 is wound around a conductive rigid body 2-6. During the slider's movement, while the power supply D1 is disconnected, the power supply D2 is closed, keeping the coil energized and changing the direction of current flow within the coil.

[0022] like Figure 4 As shown, in the vertical direction, a spring connects to the upper part of the slider linkage, providing vertical force. In the horizontal direction, one side of the slider linkage is rigidly connected to the two-way switch handle, realizing the switching action between the vertical movement of the slider linkage and the repositioning of the two-way switch.

[0023] The bidirectional switch and power supplies D1 and D2 are positioned as follows: one end of power supply D1 is connected to the coil, and the other end is connected to switch K1; one end of power supply D2 is connected to the coil, and the other end is connected to switch K2. The coil is wound around a conductive rigid body, with one end connected to power supply D2 and located at the rear end of switch K1, and the other end connected to power supply D1 and located at the front end of switch K2.

[0024] In the specific implementation process, one of the sliders in the slider connecting rod 2-1 is connected to the spring 2-2 by welding and placed together in the piston cylinder 2-8; the same slider in the slider connecting rod 2-1 is fixedly connected to the two-way switch 2-3 by welding.

[0025] During the specific installation process, when the impeller rotor is subjected to uneven force and produces an eccentric rotation tilting to the left, the gap between the left rear ring of the impeller body and the pump rear cover support becomes smaller, and the pressure in the gap decreases. At this time, the spring in the magnet on the impeller side pushes the slider to move upward, and the slider drives the bidirectional switch. At this time, switch K1 disconnects the power supply D1, switch K2 closes, and the power supply D2 energizes the coil, and the conductive rigid body exhibits an upper N-lower S polarity. Meanwhile, the spring in the magnet on the pump rear cover support side pushes the slider to move downward, and the slider drives the bidirectional switch to energize the coil, and the conductive rigid body exhibits an upper S-lower N polarity. Due to the repulsive property of like poles, the repulsive magnetic force will push the impeller body to rotate to the right to correct the rotation.

[0026] Meanwhile, when the gap between the right impeller body and the pump rear cover bracket increases, the pressure in the gap will increase. At this time, the slider in the magnet on the impeller side moves downward under pressure. The slider drives the bidirectional switch to open and close. At this time, switch K2 disconnects the power supply D2, switch K1 closes, and power supply D1 switches the power supply to energize the coil. The conductive rigid body exhibits an upper S-lower N polarity. The slider in the magnet on the pump rear cover bracket side moves upward under pressure, driving the bidirectional switch to switch the power supply to energize the coil. The conductive rigid body exhibits an upper S-lower N polarity. Due to the attraction between opposite poles, the magnetic attraction will also attract the impeller body to rotate to the right to correct itself.

[0027] By installing the magnets in a circumferential and uniformly distributed manner, the eccentric rotation problem caused by the impeller rotor in different orientations can be corrected, thereby achieving stable operation of the entire single-blade rotor system under full flow conditions.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A rotating self-balancing structure suitable for use in a single vane sewage pump rotor train, characterized by: The self-balancing structure suitable for a single-blade sewage pump rotor system comprises: an impeller body, a magnetic steel package, a key, a mechanical seal, a pump rear cover, a bearing, a bearing seat, a bearing cover, and a shaft; the impeller body is connected with the shaft through the key and realizes transmission; the mechanical seal is installed on the mechanical seal seat of the pump rear cover and is pressed by the impeller hub; the bearing is installed on the bearing seat and is pressed by the bearing cover; the magnetic steel package is symmetrically, circumferentially and evenly embedded on the outer edge of the rear cover plate of the impeller body and the pump rear cover support; one side of the magnetic steel package directly contacts with the working medium.

2. The rotating self-balancing structure suitable for a single vane sewage pump rotor system according to claim 1, characterized in that: The magnetic steel package comprises: a slider connecting rod, a spring, a power supply, a bidirectional switch, a coil, a conductive rigid body, and a base body. The base body is an outer package block structure, and the other parts are all embedded in the base body; a piston cylinder is arranged in the base body, The slider connecting rod comprises a middle rod and sliders at the upper and lower ends, and the middle rod and the sliders at the upper and lower ends are integrally welded together to form the slider connecting rod. One of the sliders in the slider connecting rod is fixedly connected with the spring and is placed in the piston cylinder together, and has an up-down sliding function; the same slider in the slider connecting rod is fixedly connected with the bidirectional switch, and the spring and the bidirectional switch are located on different surfaces of the bidirectional switch; when the slider slides upward, the bidirectional switch moves together with the slider; the coil is wound on the conductive rigid body.

3. The rotating self-balancing structure suitable for a single vane sewage pump rotor system according to claim 1, characterized in that: One of the sliders in the slider connecting rod is connected with the spring through welding and is placed in the piston cylinder together.

4. The rotating self-balancing structure suitable for a single vane sewage pump rotor system according to claim 1, characterized in that: The same slider in the slider connecting rod is fixedly connected with the bidirectional switch in a welding manner.

Images