阅读说明：本技术 一种适用于压缩机的f级绝缘电机的绝缘结构及其绝缘性提升方法 (Insulation structure of F-level insulated motor suitable for compressor and insulation improving method thereof ) 是由 包文俊 李毅 闫伟国 郎贤明 王廷奇 刘震 于 2021-08-13 设计创作，主要内容包括：本发明提供一种适用于压缩机的F级绝缘电机的绝缘结构及其绝缘性提升方法,包括：电机和绝缘结构,所述绝缘结构设置在所述电机上,本发明提供的一种适用于压缩机的F级绝缘电机的绝缘结构及其绝缘性提升方法,通过绝缘结构中槽楔、槽底绝缘、相间绝缘结构、引出线外皮覆盖物、焊点的套管以及压缩机电机的绑线材料的配合,通过隔绝电机的主要发热点来有效的提高了电机的绝缘特性。由此,采用本发明的提出的新型F级绝缘压缩机电机的绝缘方法,电机的耐热指数可以提高到155℃,极大地提升了压缩机电机的耐热等级和极限工况下的电机性能,有效的降低了电机的发热烧毁故障,提高了压缩机的可靠性。(The invention provides an insulation structure of an F-level insulated motor suitable for a compressor and an insulation lifting method thereof, wherein the insulation structure comprises the following steps: the invention provides an insulation structure of an F-level insulation motor suitable for a compressor and an insulation lifting method thereof. Therefore, by adopting the novel insulation method of the F-level insulation compressor motor, the heat resistance index of the motor can be improved to 155 ℃, the heat resistance grade of the compressor motor and the performance of the motor under the limit working condition are greatly improved, the heating burning fault of the motor is effectively reduced, and the reliability of the compressor is improved.)

1. An insulation structure of an F-class insulated motor adapted for a compressor, comprising: the motor comprises a motor and an insulating structure, wherein the insulating structure is arranged on the motor.

2. The insulation structure of an insulated electric machine for class F of a compressor according to claim 1, wherein said insulation structure comprises a slot wedge, slot bottom insulation, phase to phase insulation, outgoing wire sheath, tie wrap and copper wire solder cap.

3. A method for improving the insulation of an insulation structure of an F-class insulated motor suitable for a compressor, the method comprising the steps of:

step S1: the insulation structure of the compressor motor is made of an insulation material with the heat resistance index of more than 155 ℃, and the insulation material is a compound composed of one or more of polyimide, polyisophthaloyl metaphenylene diamine, pyridinium alkane sulfonate and polyethylene naphthalate;

step S2: the leading-out wire outer skin outside the insulation structure is covered with polytetrafluoroethylene or a polymer of poly (m-phenylene isophthalamide) and polyethylene terephthalate;

step S3: the binding tapes at the end parts of the motor winding coils adopt polyester fiber binding wires or aramid fiber binding tapes;

step S4: the welding points of the winding copper wires and the outgoing line are wrapped by polyethylene naphthalate or polyisophthaloyl metaphenylene diamine paper.

4. The method as claimed in claim 3, wherein the slot wedge, the slot bottom insulation, the phase-to-phase insulation and the copper wire welding point cap are made of one or a combination of polyimide, polyisophthaloyl metaphenylene diamine, pyridinium propane sulfonate, polyethylene naphthalate.

5. The method as claimed in claim 3, wherein the refrigerants of the compressor are R410a and R407C.

Technical Field

The invention relates to the technical field of motor insulation for compressors, in particular to an insulation structure of an F-level insulation motor suitable for a compressor and an insulation promoting method thereof.

Background

The service life and the reliability of the motor are often determined by the performance of an internal insulating material, and the motor insulation function is to enable the current in the motor to flow according to a designed path so as to prevent the motor from being burnt down due to local overheating of the motor.

Compared with a common motor, the compressor has more rigorous requirements on insulating materials due to the unique working condition, so that the compressor is not damaged in a high-pressure environment, and meanwhile, any reaction does not occur in a refrigerant environment and a refrigeration oil environment inside the compressor. Also, the compressor motor needs to be produced on an automated production line due to the compressor output requirement. There are also relatively stringent requirements on the productivity of the insulation material, i.e. a high strength in terms of stiffness and tensile strength.

The insulation grade of the compressor motor in the market at present is limited by the material characteristics of a slot wedge, slot bottom insulation, phase insulation, an insulation sleeve cap and a binding wire, and most of the compressor motor is E-grade insulation. With the increasing application of compressors in various fields, the working conditions and the use conditions are more and more severe, the actual temperature rise of the motor is far beyond the limit of E-level insulation, the service life of the motor is greatly shortened, and the motor can be burnt and other safety events are caused seriously.

Therefore, it is necessary to design an insulation structure of an F-class insulated motor suitable for a compressor and an insulation improvement method thereof.

Disclosure of Invention

According to the technical problems that the existing compressor has bad use conditions and the insulation effect of the compressor cannot meet the insulation requirement of the compressor, the insulation structure of the F-level insulation motor applicable to the compressor and the insulation lifting method of the insulation structure are provided. The invention mainly changes the material of the insulation structure aiming at the heating condition of each position of the motor, thereby playing the roles of reducing the heating burning fault of the motor and improving the reliability of the compressor.

The technical means adopted by the invention are as follows:

an insulation structure of an F-class insulated motor adapted for a compressor, comprising: the motor comprises a motor and an insulating structure, wherein the insulating structure is arranged on the motor.

Furthermore, the insulation structure comprises a slot wedge, slot bottom insulation, phase insulation, a leading-out wire outer skin, a binding band and a copper wire welding spot sleeve cap.

The invention also provides an insulation improving method of the insulation structure of the F-level insulated motor applicable to the compressor, which is characterized by comprising the following steps:

step S1: the insulation structure of the compressor motor is made of an insulation material with the heat resistance index of more than 155 ℃, and the insulation material is a compound composed of one or more of polyimide, polyisophthaloyl metaphenylene diamine, pyridinium alkane sulfonate and polyethylene naphthalate;

step S2: the leading-out wire outer skin outside the insulation structure is covered with polytetrafluoroethylene or a polymer of poly (m-phenylene isophthalamide) and polyethylene terephthalate;

step S3: the binding tapes at the end parts of the motor winding coils adopt polyester fiber binding wires or aramid fiber binding tapes;

step S4: the welding points of the winding copper wires and the outgoing line are wrapped by polyethylene naphthalate or polyisophthaloyl metaphenylene diamine paper.

Furthermore, the slot wedge, the slot bottom insulation, the phase insulation and the copper wire welding point cap adopt one or a combination of polyimide, polyisophthaloyl metaphenylene diamine, pyridinium propane sulfonate and polyethylene naphthalate as an insulation material.

Further, the refrigerants of the compressor are R410a and R407C.

Compared with the prior art, the invention has the following advantages:

according to the insulation structure of the F-level insulated motor suitable for the compressor and the insulation lifting method of the insulation structure, the insulation characteristic of the motor is effectively improved by isolating the main heating points of the motor through the cooperation of the slot wedge, the slot bottom insulation, the interphase insulation structure, the outgoing line outer skin covering, the sleeve of the welding spot and the binding wire material of the compressor motor in the insulation structure. Meanwhile, an interphase insulation structure with an optimally designed special structure is adopted, so that the strength of the motor insulation material in the motor and the saturation of end shaping are effectively ensured at the minimum cost. Therefore, by adopting the novel insulation method of the F-level insulation compressor motor, the heat resistance index of the motor can be improved to 155 ℃, the heat resistance grade of the compressor motor and the performance of the motor under the limit working condition are greatly improved, the heating burning fault of the motor is effectively reduced, and the reliability of the compressor is improved.

Based on the reason, the invention can be widely popularized in the fields of motor insulation technology for compressors and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a flowchart of an insulation structure of an F-stage insulated motor for a compressor and a method for improving insulation thereof according to the present invention.

Fig. 2 is a schematic diagram i of interphase insulation of an insulation structure of an F-class insulated motor suitable for a compressor and an insulation improvement method thereof according to the present invention.

Fig. 3 is a schematic diagram ii of interphase insulation of the insulation structure and the insulation improvement method of the F-stage insulated motor suitable for the compressor according to the present invention.

Fig. 4 is a schematic diagram of an insulation structure of an F-stage insulated motor suitable for a compressor and an insulation structure of an insulation lifting method thereof according to the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 1 to 4, the present invention provides an insulation structure of an F-stage insulated motor adapted to a compressor, comprising: the motor comprises a motor and an insulating structure, wherein the insulating structure is arranged on the motor; the insulation structure comprises a slot wedge, slot bottom insulation, phase insulation, a leading-out wire outer skin, a binding belt and a copper wire welding spot sleeve cap.

The invention also provides an insulation improving method of the insulation structure of the F-level insulated motor suitable for the compressor, which comprises the following steps:

step S1: the insulation structure of the compressor motor is made of an insulation material with the heat resistance index of more than 155 ℃, and the insulation material is a compound composed of one or more of polyimide, polyisophthaloyl metaphenylene diamine, pyridinium alkane sulfonate and polyethylene naphthalate;

step S2: the leading-out wire outer skin outside the insulation structure is covered with polytetrafluoroethylene or a polymer of poly (m-phenylene isophthalamide) and polyethylene terephthalate;

step S3: the binding tapes at the end parts of the motor winding coils adopt polyester fiber binding wires or aramid fiber binding tapes;

step S4: the welding points of the winding copper wires and the outgoing line are wrapped by polyethylene naphthalate or polyisophthaloyl metaphenylene diamine paper.

The slot wedge, the slot bottom insulation, the phase insulation and the copper wire welding spot cap adopt one or a composition of polyimide, polyisophthaloyl metaphenylene diamine, pyridinium propanesulfonate and polyethylene naphthalate as an insulation material; the refrigerants of the compressor are R410a and R407C.

Example 1

As shown in fig. 1, a method for improving the insulation performance of a compressor motor according to a preferred embodiment of the present invention, wherein the motor can adapt to the environments of high pressure, refrigerant filling and refrigeration oil in the compressor, includes:

step S1: the insulation structure of the compressor motor is made of an insulation material with the heat resistance index of more than 155 ℃, preferably, the material can be a compound composed of one or more of polyimide, polyisophthaloyl metaphenylene diamine, pyridinium propane sulfonate and polyethylene naphthalate;

step S2: the outer skin of the outgoing line outside the insulation structure is covered with polytetrafluoroethylene or a polymer of poly (m-phenylene isophthalamide) and polyethylene terephthalate;

step S3: the end part of the motor winding coil is bound by adopting a polyester fiber binding wire or an aramid fiber binding belt;

step S4: the welding points of the winding copper wires and the outgoing line are wrapped by polyethylene naphthalate or polyisophthaloyl metaphenylene diamine paper.

In the implementation of step S1, the special insulation structure shown in fig. 2 and 3 is preferably used as the phase-to-phase insulation of the compressor motor, so that the strength of the motor insulation material in the motor and the saturation of the end shaping can be effectively ensured.

As shown in fig. 4, the class F insulated motor and the corresponding insulation structure for the compressor provided by the present invention should be subjected to a subsequent shaping process according to the structural arrangement of fig. 4, so as to ensure the maximum protection of the insulation material and control of the size of the compressor motor within a reasonable range.

The method performed according to the above steps also forms a compressor motor insulation structure of one embodiment of the present invention.

In conclusion, the compressor motor insulation structure has the advantages that the insulation material of the insulation structure, the insulation covering outside the lead-out wire conductor outside the insulation structure, the binding of the end part of the compressor motor and the matching of the materials at the welding point of the motor winding copper wire and the lead-out wire are adopted, the main temperature rise point of the compressor motor is greatly guaranteed, and the insulation performance of the compressor motor is improved by the insulation structure which controls the key point with the minimum cost and reasonable degree.

Thus, by adopting the insulation structure for the compressor proposed by the present invention, the heat resistance grade of the motor can be improved to F grade. The motor adopting the insulation structure is applied to the compressors of R410a and R407C refrigerants, can effectively deal with the high-temperature and high-pressure environment in the compressors, adapts to the thermal shock influence of the higher exhaust temperature of the compressors on the motor, reduces the risk of burning the motor, and greatly improves the reliability of the compressor.

In fact, the accelerated aging test of the motor with the insulation structure on the compressor provided by the invention is used for verifying the service life, the heat resistance index reaches over 160 ℃, and the heat resistance grade of the motor and the service life in the compressor are greatly improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.