Flame-retardant insulation paper between motor slots

Abstract

The utility model relates to the technical field of flame-retardant insulation between motor slots, and discloses flame-retardant insulation paper between motor slots, which comprises a main body mechanism and an insulation mechanism, the insulation mechanism is fixedly arranged in the main body mechanism, the main body mechanism comprises a motor, a motor slot and a stator iron core, the motor slot is fixedly arranged in the motor, and the stator iron core is arranged in the motor slot. And a stator iron core is fixedly mounted in the motor groove. The high-resistivity high-voltage transformer has electrical performance and excellent insulativity, can effectively isolate conductive parts between windings and an iron core in a motor slot and between different windings, prevents current leakage and abnormal conduction by means of high resistivity, avoids short-circuit faults, and ensures normal operation of a motor. For example, in a high-voltage motor, the motor can bear high voltage without being broken down, and safe operation of the motor is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of flame-retardant insulation technology between motor slots, specifically a flame-retardant insulating paper for motor slots. Background Technology

[0002] Motors may generate high temperatures or even open flames during operation due to overload, short circuits, etc. Traditional insulation materials are mostly not flame-retardant, which can easily cause fires. With the increasing awareness of safety, the requirements for the flame retardancy of motor insulation materials are becoming more and more stringent. Adding flame retardants and using flame-retardant fibers, among other technologies, endows insulation paper with flame-retardant properties, enabling it to suppress combustion and self-extinguish when exposed to fire, thus reducing fire hazards.

[0003] Existing patent document CN 207319819 U provides an insulating paper in which polyimide resin is coated onto the surface of the insulating paper layer to form a film, reducing the step of separately forming the polyimide film and then using adhesive to bond the insulating paper.

[0004] However, existing flame-retardant motors are prone to fire when in use, and they cannot prevent the fire from spreading inside the motor, increasing the fire risk. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The purpose of this invention is to provide a flame-retardant insulating paper for motor slots, in order to solve the problem mentioned in the background art that existing materials are not flame-retardant and are prone to fire.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a flame-retardant insulating paper for motor slots, comprising a main body and an insulating mechanism, wherein the insulating mechanism is fixedly installed inside the main body, and the main body includes a motor, a motor slot, and a stator core, wherein the motor slot is fixedly installed inside the motor, and the stator core is fixedly installed inside the motor slot;

[0009] The insulation mechanism includes insulating paper, a fiber paper layer, and a polyester film layer. The insulating paper is fixedly installed inside the stator core, the fiber paper layer is fixedly installed inside the insulating paper, and the polyester film layer is fixedly installed in the middle of the insulating paper.

[0010] Furthermore, the main structure also includes stator slots and a rotor. Several stator slots are fixedly installed on the surface of the stator core, and a rotor is fixedly installed in the center of the stator core.

[0011] Furthermore, the main structure also includes a housing and a bracket. The housing is fixedly installed on the side surface of the stator core, and several brackets are fixedly installed on the surface of the housing.

[0012] Furthermore, the main body structure also includes mounting holes, and the mounting holes are fixedly installed on the surface of the bracket.

[0013] Furthermore, the main structure also includes a winding coil, and the winding coil is fixedly installed on the surface of the stator core.

[0014] Furthermore, the insulation mechanism also includes flame-retardant additives, which are fixedly installed on the surface of the insulating paper.

[0015] Furthermore, the insulation mechanism also includes an adhesive layer, which is fixedly installed between the fiber paper layer and the polyester film layer.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. In terms of electrical performance, it boasts excellent insulation, effectively isolating the conductive parts between the motor windings and the iron core, as well as between different windings. Its high resistivity prevents current leakage and abnormal conduction, avoiding short-circuit faults and ensuring normal motor operation. For example, in high-voltage motors, it can withstand high voltage without breakdown, ensuring safe operation. 2. Stable dielectric properties: Under the electric field environment of motor operation, its stable dielectric properties allow for a more balanced electrostatic field distribution between the insulating and cooling media, reducing local electric field concentration, lowering the risk of electrical aging, and extending the motor's service life. 3. In terms of fire safety: It is flame-retardant and fireproof, containing flame-retardant components. When exposed to open flames or high temperatures, it inhibits combustion by decomposing and absorbing heat, releasing non-combustible gases, and possesses self-extinguishing properties. This prevents the spread of fire inside the motor, reducing the risk of fire. If a short circuit inside the motor causes high temperatures, it can prevent the fire from spreading, protecting the motor and surrounding equipment. 4. Ensuring personnel safety: It reduces the occurrence of motor fire accidents, avoiding casualties and property losses caused by fire, and providing safety guarantees for operators and equipment operation.

[0018] 2. In terms of mechanical performance, the enhanced mechanical strength and fiber paper layer endow the insulating paper with a certain degree of mechanical strength and flexibility, enabling it to withstand vibrations and impacts during motor operation, as well as mechanical stresses during manufacturing processes such as winding. It is not easily damaged or torn, protecting the windings from mechanical damage. It also provides buffering and shock absorption protection, buffering winding vibrations and reducing friction and wear between the windings and components such as the iron core slot walls, preventing damage to the winding insulation layer due to vibration and improving motor operational reliability. Regarding environmental adaptability, it exhibits good temperature resistance, possessing a certain degree of heat resistance, maintaining stable performance within the normal operating temperature range of the motor. Some high-temperature insulating papers can also be used in high-temperature environment motors, ensuring reliable insulation performance under different operating conditions. It is resistant to chemical corrosion, exhibiting good resistance to common chemicals and solvents, and is not easily corroded by acids and alkalis. It maintains its insulation and mechanical properties even in harsh chemical environments, extending its service life. In terms of overall economic benefits, it reduces maintenance costs, decreases motor failures and damage caused by insulation problems, and reduces maintenance frequency and costs. For example, it reduces repair and replacement costs after short circuits, fires, and other faults. Improved production efficiency and motor reliability reduce downtime caused by insulation failures, ensuring production continuity and increasing production efficiency. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of this utility model.

[0024] In the diagram: 1. Main structure; 101. Motor; 102. Motor slot; 103. Stator core; 104. Stator slot; 105. Rotor; 106. Housing; 107. Bracket; 108. Mounting hole; 109. Winding coil; 2. Insulation structure; 201. Insulating paper; 202. Fiber paper layer; 203. Polyester film layer; 204. Flame retardant additive; 205. Adhesive layer. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a flame-retardant insulating paper between motor slots, including a main body 1 and an insulating mechanism 2. The insulating mechanism 2 is fixedly installed inside the main body 1. The main body 1 includes a motor 101, a motor slot 102, and a stator core 103. The motor slot 102 is fixedly installed inside the motor 101, and the stator core 103 is fixedly installed inside the motor slot 102.

[0027] The insulation mechanism 2 includes insulating paper 201, fiber paper layer 202, and polyester film layer 203. The insulating paper 201 is fixedly installed inside the stator core 103, the fiber paper layer 202 is fixedly installed inside the insulating paper 201, and the polyester film layer 203 is fixedly installed in the middle of the insulating paper 201.

[0028] Furthermore, the main body 1 also includes stator slots 104 and rotor 105. Several stator slots 104 are fixedly installed on the surface of the stator core 103, and rotor 105 is fixedly installed in the center of the stator core 103.

[0029] Furthermore, the main body 1 also includes a housing 106 and a bracket 107. The housing 106 is fixedly installed on the side surface of the stator core 103, and a plurality of brackets 107 are fixedly installed on the surface of the housing 106.

[0030] Furthermore, the main body 1 also includes mounting holes 108, and the mounting holes 108 are fixedly mounted on the surface of the bracket 107.

[0031] Furthermore, the main body 1 also includes a winding coil 109, and the winding coil 109 is fixedly installed on the surface of the stator core 103.

[0032] Furthermore, the insulation mechanism 2 also includes a flame retardant additive 204, which is fixedly installed on the surface of the insulation paper 201.

[0033] Furthermore, the insulation mechanism 2 also includes an adhesive layer 205, which is fixedly installed between the fiber paper layer 202 and the polyester film layer 203.

[0034] Working principle: The base material layer, fiber paper layer 202, is typically composed of polyester fiber nonwoven fabric, aramid fiber paper, etc. Taking polyester fiber nonwoven fabric as an example, it imparts a certain mechanical strength and flexibility to the insulating paper 201. The short-cut fibers of the aramid fiber paper enhance the mechanical strength of the material, enabling it to withstand the vibration and impact during the operation of the motor 101. It is not easily damaged during operations such as winding, ensuring the integrity and stability of the insulating paper 201 inside the motor 101.

[0035] The polyester film layer 203, as in the DMD polyester film polyester fiber nonwoven flexible composite insulating paper 201, is the main insulating part in the middle. It has excellent electrical insulation properties, effectively isolating different conductors in the motor slot 102 and preventing short circuits. At the same time, the film itself has a certain degree of toughness, and after being combined with the fiber paper layer 202, it further improves the overall mechanical properties of the insulating paper 201.

[0036] The adhesive layer 205 is used to firmly bond the fiber paper layer 202 and the insulating film layer together to form a stable composite structure. The adhesive must have good bonding strength to ensure that the layers do not delaminate under the environmental conditions such as temperature and humidity during the operation of the motor 101, thus maintaining the stability of the structure and performance of the insulating paper 201.

[0037] Electrical insulation and current blocking: When the motor 101 is running, the windings become energized. The insulating paper 201 isolates the windings from the stator core 103 and from windings of different phases. Its internal insulating film layer, such as polyester film or polyimide film, has high resistivity, which effectively prevents current from passing through the insulating paper 201 body, preventing short circuits between the windings and the core, or between different windings, ensuring that the current flows only in the specified path of the windings. For example, in a three-phase AC motor 101, the insulating paper 201 can prevent abnormal current conduction between the three-phase windings.

[0038] To withstand voltage surges, the windings of motor 101 are subjected to various voltage changes and surges during startup, operation, and shutdown. Insulating paper 201, with its excellent dielectric properties, can withstand a certain voltage without breakdown, protecting the internal structure of motor 101 from high-voltage damage. For example, under the high voltage at the moment of motor 101 startup, insulating paper 201 can ensure the safety of the windings.

[0039] Flame-retardant and fire-resistant, inhibiting combustion: When the motor 101 experiences high temperatures or open flames due to overload, short circuits, or other faults, the flame-retardant components in the flame-retardant insulating paper 201, such as the flame-retardant additives 204 contained in some insulating papers 201, come into play. These components undergo decomposition and endothermic reactions at high temperatures, lowering the surrounding temperature and inhibiting the spread of flames. Simultaneously, the non-combustible gases produced during decomposition dilute the oxygen concentration, preventing the continuation of combustion.

[0040] With its self-extinguishing properties, even if the insulating paper 201 is briefly exposed to a flame and ignited, it can quickly stop burning after the flame is removed due to its flame-retardant properties, thus preventing the fire from spreading inside the motor 101 and protecting the motor 101 and surrounding equipment.

[0041] Mechanical protection and shock absorption: When the motor 101 is running, it will vibrate. The fiber paper layer 202 of the insulating paper 201, such as polyester fiber non-woven fabric or aramid fiber paper, has a certain elasticity and flexibility, which can play a buffering role, reduce the friction and wear of the winding caused by vibration, and prevent the winding insulation layer from being damaged.

[0042] To prevent scratches, during the manufacturing process of motor 101, operations such as winding may cause mechanical damage to the windings. Insulating paper 201 serves as a protective layer to prevent the windings from directly contacting and scratching components such as the stator core 103 slot walls, thus avoiding leakage or short circuits caused by damage to the outer sheath of the winding enameled wire.

[0043] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A flame-retardant insulating paper for motor slots, comprising a main body (1) and an insulating mechanism (2), wherein the insulating mechanism (2) is fixedly installed inside the main body (1), characterized in that: The main structure (1) includes a motor (101), a motor slot (102), and a stator core (103). The motor slot (102) is fixedly installed inside the motor (101), and the stator core (103) is fixedly installed inside the motor slot (102). The insulation mechanism (2) includes insulating paper (201), fiber paper layer (202), and polyester film layer (203). The insulating paper (201) is fixedly installed inside the stator core (103), the fiber paper layer (202) is fixedly installed inside the insulating paper (201), and the polyester film layer (203) is fixedly installed in the middle of the insulating paper (201).

2. The flame-retardant insulating paper for motor slots according to claim 1, characterized in that: The main body (1) also includes stator slots (104) and rotor (105). Several stator slots (104) are fixedly installed on the surface of the stator core (103), and the rotor (105) is fixedly installed in the center of the stator core (103).

3. The flame-retardant insulating paper for motor slots according to claim 2, characterized in that: The main body (1) also includes a housing (106) and a bracket (107). The housing (106) is fixedly installed on the side surface of the stator core (103), and several brackets (107) are fixedly installed on the surface of the housing (106).

4. The flame-retardant insulating paper for motor slots according to claim 3, characterized in that: The main body (1) also includes mounting holes (108), and the mounting holes (108) are fixedly installed on the surface of the bracket (107).

5. The flame-retardant insulating paper for motor slots according to claim 4, characterized in that: The main body (1) also includes a winding coil (109), and the winding coil (109) is fixedly installed on the surface of the stator core (103).

6. The flame-retardant insulating paper between motor slots according to claim 5, characterized in that: The insulation mechanism (2) also includes a flame retardant additive (204), and the flame retardant additive (204) is fixedly installed on the surface of the insulation paper (201).

7. The flame-retardant insulating paper for motor slots according to claim 6, characterized in that: The insulation mechanism (2) further includes an adhesive layer (205), which is fixedly installed between the fiber paper layer (202) and the polyester film layer (203).

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