Electronic rotor cage bar reinforcing method and motor rotor

Abstract

The invention relates to the technical field of water pump motors, in particular to an electronic rotor cage bar reinforcing method and a motor rotor, and the method comprises the steps: taking down an end ring of the motor rotor; counterweights are additionally arranged on the cage bars; the end rings are installed at the ends of the cage bars again; a plurality of counter weights are bound through binding bands; and carrying out dynamic balance adjustment on the motor rotor. According to the electronic rotor cage bar reinforcing method and the motor rotor, the overall structure can become more stable by adding the counterweight to the cage bars. Therefore, cage bar movement or deformation caused by centrifugal force during high-speed rotation can be reduced, and the operation stability and reliability of the motor can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of water pump motors, and in particular to an electronic rotor cage reinforcement method and a motor rotor. Background Art

[0002] The circulating water pump motor was designed to rotate equipment every month at the beginning. In order to meet the peak load demand of the power grid, the current working condition requires dual pump operation and frequent start and stop every day. The existing circulating pump motor rotor design cannot meet the peak load demand. During regular inspections, it is often found that frequent equipment startup easily causes motor cage bar fracture, which seriously affects the safe operation of the unit. To this end, the present invention provides an electronic rotor cage bar reinforcement method and a motor rotor. Summary of the invention

[0003] In view of the problems existing in the above-mentioned existing electronic rotor cage bar reinforcement method and motor rotor, the present invention is proposed.

[0004] Therefore, one of the objects of the present invention is to provide a method for reinforcing an electronic rotor cage bar, the purpose of which is to reinforce the cage bar so that it will not break.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an electronic rotor cage reinforcement method and a motor rotor, comprising:

[0006] By removing the end ring of the motor rotor;

[0007] By adding weight to the cage bars;

[0008] By installing the end rings again on the ends of the cage bars;

[0009] By tying a plurality of weights by means of straps; and,

[0010] By dynamically balancing the motor rotor.

[0011] As a preferred solution of the electronic rotor cage bar reinforcement method of the present invention, before removing the end ring, the end ring is first heated to expand it and then removed.

[0012] As a preferred solution of the electronic rotor cage bar reinforcement method of the present invention, the counterweight has electrical conductivity and mechanical strength to enhance the tensile strength and fatigue resistance of the cage bars.

[0013] As a preferred solution of the electronic rotor cage reinforcement method of the present invention, the counterweight is made of copper.

[0014] As a preferred solution of the electronic rotor cage bar reinforcement method of the present invention, the binding strap is made of high-strength fiber material to provide additional mechanical constraints.

[0015] As a preferred solution of the electronic rotor cage reinforcement method of the present invention, the binding belt is made of φ20 glass fiber cloth rope.

[0016] As a preferred solution of the electronic rotor cage reinforcement method of the present invention, the motor rotor is subjected to dynamic balancing test and adjustment by a dynamic balancing machine.

[0017] The beneficial effect of this method is that by adding counterweights to the cage bars, the overall structure can be made more stable, which helps to reduce the movement or deformation of the cage bars caused by centrifugal force during high-speed rotation, thereby improving the running stability and reliability of the motor.

[0018] Another object of the present invention is to provide a method for reinforcing an electronic rotor cage bar, the purpose of which is to reinforce the cage bar so that it will not break.

[0019] In order to solve the above technical problems, the present invention provides the following technical solutions: a motor rotor, comprising;

[0020] The mounting assembly includes a rotor body, a plurality of cage bars disposed at two ends of the rotor body, and end rings disposed at ends of the cage bars;

[0021] A reinforcement assembly comprising a counterweight disposed on the cage bar and a strap disposed on a plurality of the counterweights

[0022] As a preferred solution of the electronic rotor of the present invention, the counterweight is made of copper.

[0023] As a preferred solution of the electronic rotor of the present invention, the binding belt is made of φ20 glass fiber cloth rope.

[0024] The beneficial effect of the present invention is that by adding counterweights to the cage bars, the overall structure can be made more stable, which helps to reduce the movement or deformation of the cage bars caused by centrifugal force during high-speed rotation, thereby improving the running stability and reliability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of the electronic rotor of the present invention.

[0027] Figure 2It is a structural schematic diagram of a comparative example of the present invention. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0031] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0032] Example 1, reference Figure 1 , which is a first embodiment of the present invention, provides a method for reinforcing an electronic rotor cage bar 102, the method comprising:

[0033] S1. By removing the end ring 103 of the motor rotor;

[0034] When the cage bar 102 is modified, the end ring 103 at the end of the cage bar 102 needs to be removed first to facilitate the inspection and cleaning of the cage bar 102 and the subsequent addition of the counterweight 201.

[0035] The removal of the end ring 103 exposes the cage bars 102 and the internal structure, facilitating precise operation and adjustment.

[0036] When the end ring 103 is removed, the end ring 103 can be heated to expand so that it can be easily separated from the cage bar 102, thereby avoiding damage to the cage bar 102 caused by violent removal.

[0037] By removing the end ring 103 , it is possible to ensure that a detailed internal inspection and operation can be carried out without damaging the rotor structure, which helps to discover potential defects or abnormalities and provides the necessary space and operating conditions for the subsequent addition of the counterweight 201 .

[0038] S2. By adding a counterweight 201 to the cage bar 102;

[0039] After removing the end ring 103, a special device is used to add a counterweight 201 to the cage bar 102. First, the cage bar 102 is initially installed and fixed, and the counterweight 201 is usually fixed to the cage bar 102 by welding or bolts.

[0040] The purpose of adding the counterweight 201 is to reduce or eliminate the unbalanced force by adjusting the center of gravity of the rotor, thereby reducing vibration and noise. Accurate addition of the counterweight 201 can keep the rotor balanced when rotating at high speed.

[0041] The counterweight 201 should have electrical conductivity and mechanical strength to enhance the tensile strength and fatigue resistance of the cage bars 102. The counterweight 201 can be made of metal materials such as copper, aluminum, silver, gold, stainless steel, etc., among which copper is preferably used because it has very good electrical conductivity and medium mechanical strength, and its cost is relatively low.

[0042] By adding a counterweight 201 to the cage bar 102, the dynamic balance performance of the motor rotor can be significantly improved. This not only reduces vibration and noise, but also extends the service life of the motor and improves operating efficiency and reliability. The precise counterweight 201 can also prevent mechanical stress concentration and structural fatigue caused by imbalance, protecting key motor components from damage.

[0043] S3. By installing the end ring 103 again on the end of the cage bar 102;

[0044] After adding the counterweight 201 to the cage bar 102, the end ring 103 is reinstalled on the end of the cage bar 102. The end ring 103 is usually fixed by a dowel pin and a bolt to ensure a tight connection between the end ring 103 and the cage bar 102.

[0045] S4. By tying the plurality of weights 201 by straps 202;

[0046] After adding a plurality of counterweights 201 to the cage bars 102, the counterweights 201 are tied and fixed using high-strength binding straps 202. The binding straps 202 are usually made of high-strength fiber materials to ensure the firmness and durability of the binding.

[0047] The binding strap 202 is made of glass fiber, carbon fiber, aramid fiber, silicon carbide fiber and the like, and is preferably made of φ20 glass cloth rope.

[0048] Binding the multiple counterweights 201 together by means of the binding straps 202 can provide additional mechanical constraints to prevent the counterweights 201 from shifting or falling off during operation. Binding increases the fixing strength of the counterweights 201 and ensures their stability at high speeds.

[0049] At the same time, by tying the counterweight 201, the stability and reliability of the counterweight 201 system can be further improved. The strap 202 not only increases the fixing strength of the counterweight 201, but also prevents the displacement and falling off of the counterweight 201 at high speeds. This ensures the lasting effect of the dynamic balance adjustment and reduces the need for secondary adjustment due to the loosening of the counterweight 201.

[0050] S5. Perform dynamic balancing on the motor rotor.

[0051] After the counterweight 201 is added and the end ring 103 is installed, a precision dynamic balancing machine is used to adjust the dynamic balance of the motor rotor. Through real-time monitoring and data analysis of the test equipment, the counterweight 201 is added and welded until the rotor reaches the optimal balance state.

[0052] The function of dynamic balancing is to accurately measure and adjust the rotor imbalance so that it can maintain balance at high speed and reduce vibration and noise. The dynamic balancing test guides the addition and adjustment of the counterweight by measuring the imbalance and its distribution.

[0053] Dynamic balancing can significantly improve the running stability and reliability of the motor rotor. Accurate dynamic balancing reduces the vibration and noise caused by imbalance, prolongs the service life of the motor, and improves the running efficiency and product quality. Dynamic balancing also ensures the stable operation of the motor under various working conditions and prevents mechanical damage and failure caused by excessive vibration.

[0054] Example 2, reference Figure 1 , which is a second embodiment of the present invention, provides a motor rotor, and the device includes: a mounting component 100 and a reinforcement component 200.

[0055] The mounting assembly 100 includes a rotor body 101, a plurality of cage bars 102 disposed at both ends of the rotor body 101, and an end ring 103 disposed at the end of the cage bar 102;

[0056] Under the operation of the existing installation assembly 100, the motor is frequently started and stopped every day, and the existing circulating pump motor rotor design cannot meet the peak load demand. During regular inspections, it is often found that frequent startup of the equipment easily causes the motor cage bar 102 to break. Therefore, the cage bar 102 is reinforced and improved to meet the peak load demand.

[0057] The cage bars 102 are reinforced by installing a reinforcement assembly 200 , wherein the reinforcement assembly 200 includes a counterweight 201 disposed on the cage bars 102 , and a binding strap 202 disposed on the plurality of counterweights 201 .

[0058] The purpose of adding the counterweight 201 is to reduce or eliminate the unbalanced force by adjusting the center of gravity of the rotor, thereby reducing vibration and noise. Accurate addition of the counterweight 201 can keep the rotor balanced when rotating at high speed.

[0059] The counterweight 201 should have electrical conductivity and mechanical strength to enhance the tensile strength and fatigue resistance of the cage bars 102. The counterweight 201 can be made of metal materials such as copper, aluminum, silver, gold, stainless steel, etc., among which copper is preferably used because it has very good electrical conductivity and medium mechanical strength, and its cost is relatively low.

[0060] When installing the counterweight 201, the end ring 103 needs to be disassembled to expose the cage bar 102 and the internal structure for accurate operation and adjustment. After the counterweight 201 is installed on the cage bar 102, the end ring 103 is reinstalled.

[0061] Then, by wrapping the straps 202 around the multiple counterweights 201, the counterweights 201 are tied by the straps 202. Tying the multiple counterweights 201 together by the straps 202 can provide additional mechanical constraints to prevent the counterweights 201 from shifting or falling off during operation. The tying increases the fixing strength of the counterweights 201 and ensures their stability at high speeds.

[0062] At the same time, by tying the counterweight 201, the stability and reliability of the counterweight 201 system can be further improved. The strap 202 not only increases the fixing strength of the counterweight 201, but also prevents the counterweight 201 from shifting and falling off at high speeds. This ensures the lasting effect of dynamic balancing adjustment and reduces the need for secondary adjustment due to loose counterweight 201.

[0063] Furthermore, the binding strap 202 is usually made of high-strength fiber material to ensure the firmness and durability of the binding.

[0064] The binding strap 202 is made of glass fiber, carbon fiber, aramid fiber, silicon carbide fiber and the like, and is preferably made of φ20 glass cloth rope.

[0065] After completing the installation of the counterweight 201 and the strap 202 and reinforcing the cage bar 102, it is necessary to perform a dynamic balance test and adjustment on the motor rotor to keep it balanced when rotating at high speed and reduce vibration and noise. During the adjustment, the counterweight 201 will be repaired by welding or cut off.

[0066] After the cage bars 102 are reinforced, the overall structure of the motor rotor becomes more stable, which helps to reduce the movement or deformation of the cage bars 102 caused by the centrifugal force during high-speed rotation, thereby improving the running stability and reliability of the motor.

[0067] The reinforcement of the cage bars 102 helps prevent common faults such as broken cage bars and open welding. Welding short brass bars at the part where the cage bars 102 are extended can effectively prevent the cage bars 102 from breaking due to movement during operation, and can also avoid the cage bars 102 from being thrown out and scratching the stator due to open welding. This greatly reduces the failure rate and maintenance cost of the motor.

[0068] The stable rotor structure helps the motor maintain higher efficiency during operation. Since the energy loss and efficiency drop caused by the cage bar 102 problem are reduced, the motor can more effectively convert electrical energy into mechanical energy, thereby improving the overall operating efficiency.

[0069] The reinforced cage bars 102 enable the motor to better adapt to various working environments. Whether it is high temperature, high humidity or other harsh conditions, the reinforced cage bars 102 can maintain stable performance and ensure the normal operation of the motor in these environments.

[0070] The dynamic balance performance and overall operation stability of the motor rotor can be significantly improved by a series of steps including adding the counterweight 201 to the cage bar 102, tying the counterweight 201, and performing dynamic balance adjustment.

[0071] The beneficial effects of this reinforcement component 200 include reducing vibration and noise, extending the service life of the motor, improving operating efficiency and product quality, and ensuring safe and reliable operation of the motor at high speed rotation.

[0072] Comparative Example 1, reference Figure 2 , which is the first comparative example of the present invention, provides an existing motor rotor, which includes a rotor body 101, a plurality of cage bars 102 arranged at both ends of the rotor body 101, and an end ring 103 arranged at the end of the cage bar 102.

[0073] like Figure 2 As shown, it has no counterweight 201 and strap 202. When this mounting assembly 100 is working, it is frequently started and stopped every day. The existing circulating pump motor rotor design cannot meet the peak-shaving demand. During regular inspections, it is often found that frequent starting of the equipment can easily cause the motor cage bars 102 to break.

[0074] To this end, the cage bar 102 is reinforced and improved to meet the peak load demand, and a series of steps such as adding a counterweight 201 to the cage bar 102, tying the counterweight 201, and adjusting the dynamic balance can significantly improve the dynamic balance performance and overall operating stability of the motor rotor. It can reduce vibration and noise, extend the service life of the motor, improve operating efficiency and product quality, and ensure the safe and reliable operation of the motor at high speed.

[0075] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0076] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0077] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for reinforcing an electronic rotor cage bar, characterized in that: include, By removing the end ring (103) of the motor rotor; By adding a counterweight (201) to the cage bar (102); By reinstalling the end ring (103) on the end of the cage bar (102); By tying a plurality of counterweights (201) by means of straps (202); and, By dynamically balancing the motor rotor.

2. The electronic rotor cage reinforcement method according to claim 1, characterized in that: Before the end ring (103) is removed, the end ring (103) is heated to expand it before the end ring (103) is removed.

3. The electronic rotor cage reinforcement method according to claim 1, characterized in that: The counterweight (201) has electrical conductivity and mechanical strength to enhance the tensile strength and fatigue resistance of the cage bar (102).

4. The electronic rotor cage reinforcement method according to claim 3, characterized in that: The counterweight (201) is made of copper.

5. The electronic rotor cage reinforcement method according to any one of claims 1 to 4, characterized in that: The binding strap (202) is made of high-strength fiber material to provide additional mechanical constraints.

6. The electronic rotor cage reinforcement method according to claim 5, characterized in that: The binding belt (202) is made of φ20 glass fiber cloth rope.

7. The electronic rotor cage reinforcement method according to claim 1, characterized in that: The motor rotor is dynamically balanced and adjusted using a dynamic balancing machine.

8. A motor rotor manufactured by the motor rotor cage reinforcement method according to any one of claims 1 to 7, characterized in that: include; A mounting assembly (100) comprising a rotor body (101), a plurality of cage bars (102) arranged at two ends of the rotor body (101), and an end ring (103) arranged at the end of the cage bars (102); A reinforcement assembly (200) comprises a counterweight (201) arranged on the cage bar (102), and a binding strap (202) arranged on a plurality of the counterweights (201).

9. A motor rotor as claimed in claim 8, characterized in that: The counterweight (201) is made of copper.

10. A motor rotor as claimed in claim 8, characterized in that: The binding belt (202) is made of φ20 glass fiber cloth rope.

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