CN118030712A - Main bearing for compressor, compressor and air conditioner - Google Patents

Abstract

The application relates to the technical field of air conditioners, and discloses a main bearing for a compressor, the compressor and an air conditioner. The main bearing for a compressor includes: the flange skirt is positioned at the periphery of the main bearing outer ring and protrudes outwards; the alloy coating is coated on the outer side wall of the flange skirt through an atmospheric plasma spraying process; wherein the alloy coating comprises carbon, manganese, phosphorus, sulfur and iron. According to the application, the alloy coating with special components is sprayed on the flange skirt through the atmospheric plasma spraying process, so that the alloy coating can be firmly attached to the outer wall of the flange skirt, meanwhile, the welding reliability of the main bearing is improved, the alloy coating is welded with the shell of the compressor through the laser penetration welding process, and the connection reliability and bearing capacity of the main bearing and the shell are improved.

Description

Main bearing for compressor, compressor and air conditioner

Technical Field

The application relates to the technical field of air conditioners, in particular to a main bearing for a compressor, the compressor and an air conditioner.

Background

At present, in the existing rotary compressor assembly technology, a pump body assembly and a shell assembly are welded and assembled through three-spot welding or six-spot welding, in order to meet the welding and assembling requirements, a welding hole is required to be machined on a main bearing, a hole is required to be punched on the shell to meet the requirement of pump body welding, and the machining and welding procedures are multiple and high in cost.

In the related art, the main bearing in the pump body assembly is connected with the shell by adopting a laser penetration welding technology, so that the processing steps are reduced, and the production cost is saved.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

Because the main bearing is made of gray cast iron, the shell is made of steel, and the consistency of a welding pool formed on the gray cast iron main bearing by penetration welding in the prior art is poor, the pool at each part is easy to be intermittent and inconsistent after the pump body assembly is welded, and the reliability of long-term operation is difficult to be ensured, so that the application and popularization of the penetration welding pump body technology are slower.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides a main bearing for a compressor, the compressor and an air conditioner, so as to solve the problems that a welding process of a pump body component and a shell component of the compressor is complex, and the reliability of laser penetration welding is low.

According to a first aspect of the present invention there is provided a main bearing for a compressor comprising: the flange skirt is arranged on the periphery of the main bearing outer ring and protrudes outwards, and the main bearing outer ring is made of metal; the alloy coating is coated on the outer side wall of the flange skirt through an atmospheric plasma spraying process; wherein the alloy coating comprises carbon, manganese, phosphorus, sulfur and iron.

Optionally, the alloy coating comprises the following components in parts by weight: 0.1 to 0.15% carbon, 0.4 to 0.5% manganese, 0.025 to 0.035% phosphorus, 0.02 to 0.025% sulfur, and 99% or more iron.

Alternatively, the alloy coating thickness H1 is 2mm to 3mm.

Optionally, the main bearing matrix is made of gray cast iron, and the shell is made of steel.

Optionally, the alloy coating comprises 0.12% carbon by weight, 0.44% manganese by weight, 0.029% phosphorus by weight, 0.023% sulfur by weight, and the balance iron and unavoidable impurities.

In some embodiments, the parts by weight of carbon in the alloy coating includes 0.1%, 0.12%, 0.13%, 0.14%, or 0.15%. The manganese in the gold coating comprises 0.4%, 0.042%, 0.45%, 0.048% or 0.5% by weight. The weight portion of phosphorus in the gold coating comprises 0.025%, 0.028%, 0.03%, 0.032% or 0.035%. The weight portion of sulfur in the gold coating comprises 0.02%, 0.022%, 0.023%, 0.024% or 0.025%.

According to a second aspect of the present invention there is provided a compressor comprising: a housing defining a compressor interior installation space; the main bearing for a compressor according to any one of the above embodiments, mounted in a housing; wherein the flange skirt edge is fixedly connected with the inner wall of the shell through an alloy coating by a laser penetration welding process.

Optionally, the distance H2 between the flange skirt outer wall and the corresponding housing inner wall is 0.08mm to 0.12mm.

Optionally, the laser penetration weld point of the flange skirt and the housing is greater than 3.

Alternatively, in the case where the laser penetration welding extends in the axial direction of the housing, the length L1 of the laser penetration welding is 0.5 to 0.8 times the length H of the flange skirt in the axial direction; in the case where the laser penetration welding extends along the circumferential direction of the housing, the length L1 of the laser penetration welding is 0.05 times to 0.1 times the outer circumference of the corresponding housing.

Alternatively, the penetration delta at the laser weld within the alloy coating is 1mm to 1.5mm.

According to a third aspect of the present invention there is provided an air conditioner comprising a compressor as in any of the above embodiments.

The main bearing for the compressor, the compressor and the air conditioner provided by the embodiment of the disclosure can realize the following technical effects:

for the main bearing for the compressor, an alloy coating with special components is sprayed on the flange skirt through an atmospheric plasma spraying process, so that the alloy coating can be firmly attached to the outer wall of the flange skirt, and meanwhile, the welding reliability of the main bearing is improved;

For the compressor, the alloy coating of the main bearing and the steel shell of the compressor are welded together by utilizing a laser penetration welding process, so that the consistency of a welding pool of the main bearing and the shell is improved, and the welding reliability and the bearing capacity are improved.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

FIG. 1 is a schematic cross-sectional structural view of a main bearing provided by an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of a main bearing according to one embodiment of the present disclosure;

FIG. 3 is a schematic cross-sectional structural view of a compressor provided by an embodiment of the present disclosure;

FIG. 4 is an enlarged schematic view of FIG. 3 at A;

FIG. 5 is a schematic view of a laser penetration weld configuration of a main bearing and a housing provided in accordance with one embodiment of the present disclosure;

FIG. 6 is a schematic structural view of a compressor laser penetration welded to extend circumferentially along a casing provided in accordance with one embodiment of the present disclosure;

FIG. 7 is a schematic structural view of a compressor laser penetration welded to extend axially along a housing provided in accordance with one embodiment of the present disclosure;

FIG. 8 is an exploded view of a compressor provided in accordance with one embodiment of the present disclosure;

FIG. 9 is a schematic structural view of a main bearing and shell weld anti-drop test apparatus provided in accordance with one embodiment of the present disclosure;

Fig. 10 is a schematic structural diagram of a main bearing alloy layer adhesion test apparatus according to an embodiment of the present disclosure.

Reference numerals:

10: a main bearing; 11: a flange skirt; 12: an alloy coating;

20: a compressor; 21: a housing; 22: an installation space; 23: laser penetrates the welding point; 24: a welding pool;

30: a pressing plate; 31: a support base; 32: a fixed base; 33: a fixing screw; 34: cementing; 35: and (5) connecting bolts.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe embodiments of the present disclosure and embodiments thereof and are not intended to limit the indicated device, element, or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art in view of the specific circumstances.

In addition, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.

The term "plurality" means two or more, unless otherwise indicated.

In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

At present, in the existing rotary compressor assembly technology, a pump body assembly and a shell assembly are welded and assembled through three-spot welding or six-spot welding, in order to meet the welding and assembling requirements, a welding hole is required to be machined on a main bearing, a hole is required to be punched on the shell to meet the requirement of pump body welding, and the machining and welding procedures are multiple and high in cost.

In the related art, a pump body assembly is welded by laser penetration. However, as the main bearing is made of gray cast iron, the shell is made of steel, and the consistency of a welding pool formed on the gray cast iron main bearing by penetration welding in the prior art is poor, the pool at each part is easy to be intermittent and inconsistent after the pump body assembly is welded, and the reliability of long-term operation is difficult to be ensured, so that the application and popularization of the penetration welding pump body technology are slower.

According to the main bearing for the compressor, the alloy coating with special components is sprayed on the flange skirt through the atmospheric plasma spraying process, so that the alloy coating can be firmly attached to the outer wall of the flange skirt, and meanwhile, the welding reliability of the main bearing is improved.

According to the application, for the compressor, the alloy coating of the main bearing and the steel shell of the compressor are welded together by utilizing the laser penetration welding process, so that the consistency of a welding pool of the main bearing and the shell is improved, and the welding reliability and bearing capacity are improved.

As shown in connection with fig. 1-10, an embodiment of the present disclosure provides a main bearing 10 for a compressor 20, including a flange skirt 11 and an alloy coating 12. The flange skirt 11 is arranged on the periphery of the outer ring of the main bearing 10 and protrudes outwards, and the outer ring of the main bearing 10 is made of metal; the alloy coating 12 is coated on the outer side wall of the flange skirt 11 through an atmospheric plasma spraying process; wherein the alloy coating 12 comprises carbon, manganese, phosphorus, sulfur, and iron.

As shown in fig. 1 and 2, an alloy coating 12 of a specific composition is sprayed on the flange skirt 11 by an atmospheric plasma spraying process, so that the alloy coating 12 can be firmly attached to the outer wall of the flange skirt 11, and the welding reliability of the main bearing 10 is improved. The outer ring of the main bearing 10 is made of gray cast iron, the shell 21 is made of steel, so that the consistency of a welding pool 24 formed on the gray cast iron main bearing 10 by penetration welding is poor, and the welding pools at all parts of the pump body assembly of the compressor 20 are easy to be intermittent and inconsistent after welding, so that the stability is poor. The alloy coating 12 made of carbon, manganese, phosphorus, sulfur and iron is sprayed on the gray cast iron matrix by combining an atmospheric plasma spraying process, so that the alloy coating 12 can be firmly attached to the gray cast iron matrix and is not easy to fall off. At the same time, the alloy coating 12 and the steel of the shell 21 form a molten pool with good consistency, and a molten pool with good continuity can be formed so as to increase welding stability. The hardness of the alloy coating 12 after being sprayed is 130 HB-165 HB, the alloy coating has good abrasion resistance while having good molten pool consistency, and compared with gray cast iron, the alloy coating is not easy to break and damage, and the reliability of a welding part can be improved well.

Optionally, the alloy coating 12 comprises, in parts by weight: 0.1 to 0.15% carbon, 0.4 to 0.5% manganese, 0.025 to 0.035% phosphorus, 0.02 to 0.025% sulfur, and 99% or more iron.

The composition ratio of each material in the alloy coating 12 is fixed, the consistency of the welding pool 24 of the alloy coating 12 and the steel shell 21 is controlled by combining the atmospheric plasma spraying technology, and the hardness of the alloy coating 12 can be controlled between 130HB and 165HB so as to ensure the reliability of the welding strength.

Optionally, the alloy coating 12 comprises 0.12% carbon by weight, 0.44% manganese by weight, 0.029% phosphorus by weight, 0.023% sulfur by weight, and the balance iron and unavoidable impurities.

In some embodiments, the parts by weight of carbon in the alloy coating 12 include 0.1%, 0.12%, 0.13%, 0.14%, or 0.15%. The manganese in the gold coating comprises 0.4%, 0.042%, 0.45%, 0.048% or 0.5% by weight. The weight portion of phosphorus in the gold coating comprises 0.025%, 0.028%, 0.03%, 0.032% or 0.035%. The weight portion of sulfur in the gold coating comprises 0.02%, 0.022%, 0.023%, 0.024% or 0.025%. Wherein, each material is fully mixed into alloy powder in a powder form and then sprayed on the surface of the gray cast iron matrix through an atmospheric plasma spraying technology.

Optionally, the alloy coating 12 comprises, in parts by weight: 0.12% carbon, 0.44% manganese, 0.029% phosphorus, 0.023% sulfur, the remainder being iron.

Alternatively, the alloy coating 12 has a thickness H1 of 2mm to 3mm.

As shown in fig. 1 and 4, H1 is the radial thickness of the alloy coating 12 sprayed onto the outer side of the gray cast iron of the main bearing 10 by atmospheric plasma spraying multiple times. During welding of the main bearing 10 and the shell 21, a molten pool is formed by the alloy coating 12 and the shell 21, and the molten pool cannot penetrate the alloy coating 12 to the gray cast iron matrix, so that the thickness of the alloy coating 12 has a certain requirement. In order to ensure that the depth of the molten pool immersed in the alloy coating 12, namely the penetration, meets the stress requirement, the thickness of the alloy coating 12 is more than 2mm, and in order to save the cost, the thickness of the alloy coating 12 is controlled to be less than 3mm.

As shown in connection with fig. 1-8, an embodiment of the present disclosure provides a compressor 20 comprising a housing 21 and a main bearing 10 for the compressor 20 as in any of the above embodiments. Wherein the housing 21 defines an internal installation space 22 of the compressor 20; the main bearing 10 is mounted in the housing 21; wherein, the flange skirt 11 is fixedly connected with the inner wall of the shell 21 through an alloy coating 12 by a laser penetration welding process.

As shown in fig. 3 and 4, the housing 21 is cylindrical and includes an outer cylindrical surface and an inner cylindrical surface, and the outer cylindrical surface and the inner cylindrical surface have uniform wall thicknesses at least at the mating portions of the corresponding main bearings 10. The outer ring of the main bearing 10 is cylindrical, an outward protruding flange skirt 11 is arranged on the outer circumferential wall surface of the cylindrical outer ring, which is close to one shaft end, the outer contour of the flange skirt 11 is cylindrical, an alloy coating 12 is sprayed on the outer circumferential surface of the flange skirt 11 and is matched with the inner wall surface of the shell 21, the outer circumferential surface of the flange skirt 11 and the inner wall surface of the shell 21 are in clearance fit, so that the main bearing is convenient to install, and the shell 21 and the alloy coating 12 of the flange skirt 11 are fused together at the matched position of the flange skirt 11 corresponding to the outer surface of the shell 21 through a laser penetration welding technology, so that the main bearing 10 and the shell 21 are fixedly connected. The alloy coating 12 has good consistency with the molten pool formed by the shell 21, and the connection strength is enhanced.

The compressor 20 provided in the embodiments of the present disclosure has the entire advantages of the main bearing 10 for the compressor 20 of any one of the above embodiments because it includes the main bearing 10 for the compressor 20 of any one of the above embodiments, and is not described in detail herein.

Alternatively, the distance H2 between the outer wall of the flange skirt 11 and the corresponding inner wall of the housing 21 is 0.08mm to 0.12mm.

As shown in fig. 3 and 4, H2 is the size of the gap between the periphery of the flange skirt 11 and the inner wall of the housing 21, so that the heat conduction is not affected while the damage caused by the contact friction between the flange skirt 11 and the inner wall of the housing 21 is prevented. The alloy coating 12 of the housing 21 and the flange skirt 11 is welded to the outer surface of the housing 21 through the housing 21 by laser penetration technique. The too big clearance can influence the heat conduction, leads to the molten pool degree of depth insufficient, reduces welding strength reliability, and the too little promotion processing degree of difficulty and manufacturing cost in clearance is difficult to avoid simultaneously flange shirt rim 11 and casing 21 inner wall to take place the contact friction and cause the part damage and install the difficulty. The gap between the outer wall of the flange skirt 11 and the inner wall of the shell 21 is controlled to be 0.08mm to 0.12mm, so that the production cost can be saved and the installation difficulty can be reduced under the condition that the welding requirement is met as much as possible.

Alternatively, the laser penetration weld point 23 of the flange skirt 11 and the housing 21 is greater than 3.

As shown in fig. 6 and 7, the main bearing 10 in the compressor 20 needs to bear multi-directional stress, and in order to ensure the reliability of the welding operation of the main bearing 10, the laser penetration welding point 23 of the flange skirt 11 and the shell 21 is larger than 3 so as to bear multi-directional applied acting force. Wherein, 3 dare tie points should be according to circumference equipartition, and follow axial direction on the coplanar.

Alternatively, in the case where the laser penetration welding extends axially along the housing 21, the length L1 of the laser penetration welding is 0.5 to 0.8 times the length H of the flange skirt 11 in the axial direction; in the case where the laser penetration welding extends in the circumferential direction of the housing 21, the length L1 of the laser penetration welding is 0.05 to 0.1 times the outer circumference of the corresponding housing 21.

As shown in fig. 4,6 and 7, the L1 laser penetrates the length of the molten pool welded to the surface of the case 21. Laser penetration welding can be divided into axial extension welding and circumferential extension welding, which can meet the connection requirements. The length of the flange skirt 11 along the axial direction is H, chamfers are arranged at two ends of the flange skirt 11 in the axial direction, so that the matching length of the flange skirt 11 and the shell 21 is smaller than H, a molten pool at two ends of the axial direction is separated from an alloy coating 12 due to overlong welding length, gaps are easily generated, welding strength is reduced, the welding strength is insufficient due to overlong welding length, the laser penetration welding length L1 is controlled to extend to 0.5-0.8 times of the total length of the flange skirt 11 from the middle position of the alloy coating 12 of the flange skirt 11 to two sides, and the molten pool of the shell 21 is ensured to be smaller than the alloy coating 12 of the flange skirt 11 along the axial direction. In the case where laser penetration welding is extended in the circumferential direction of the housing 21, as shown in fig. 6, L1 is the length of the weld pool 24 in the circumferential direction of the housing 21. At this time, the flange skirt 11 is circumferentially fitted to the inner wall of the housing 21, and the welding pool 24 is limited to 0.05 to 0.1 times the circumference of the outer wall of the housing 21 in terms of welding cost and avoiding interference with other parts of the outer wall of the housing 21 under the condition that the welding strength is satisfied. Wherein, laser penetration welding points 23 on the outer wall of the shell 21 are uniformly distributed along the circumferential direction and are larger than 3 parts.

Alternatively, the penetration delta at the laser weld within the alloy coating 12 is 1mm to 1.5mm.

As shown in fig. 4 and 5, laser penetration welding is performed by welding the outer wall of the housing 21, and heat is transferred to the alloy coating 12 by heat conduction so that the alloy coating 12 merges with the housing 21 to form a continuous weld pool 24. To ensure weld strength, the molten pool is immersed in alloy coating 12 to a depth of greater than 1mm to meet the strength of the connection of main bearing 10 to shell 21 over the operating life of compressor 20. The depth of the welding pool 24 immersed in the alloy coating 12 is smaller than 1.5mm, so that welding cost can be reduced, meanwhile, the thickness of the alloy coating 12 is 2mm to 3mm, under the condition that the thickness of the alloy coating 12 is 2mm, the welding pool 24 immersed in the alloy coating 12 is too deep, so that the welding pool penetrates through the alloy coating 12 to be in contact with an internal gray cast iron matrix, and the welding strength is reduced due to poor consistency of the welding pool of the gray cast iron and the shell 21. Controlling the depth of the weld pool 24 immersed in the alloy coating 12 to be less than 1.5mm can ensure that welding always occurs between the alloy coating 12 and the housing 21 to ensure connection reliability. As shown in fig. 5, the laser penetration welding is first performed by heating the outer surface of the casing 21, the outer surface of the casing 21 is melted by heating, and heat is gradually transferred to the inside of the casing 21 to the alloy coating 12, thereby forming a molten pool, the outer surface of the casing 21 is recessed inward, and the molten pool is gradually immersed into the inside of the alloy coating 12, so that the alloy coating 12 is connected with the casing 21.

It will be appreciated that the main bearing 10 provided in the embodiments of the present disclosure is not limited to application in the compressor 20, but may be applied to cases where the flange skirt 11 of other flange bearings is gray cast iron and the parts to be welded to the flange skirt 11 are steel, the problem of poor welding reliability of the gray cast iron flange skirt 11 and the steel parts may be solved by spraying the alloy coating 12 in the embodiments of the present disclosure on the flange skirt 11 by the atmospheric plasma technique.

Test one:

Referring to fig. 9, in the embodiment of the present disclosure, a welding anti-drop test of the main bearing 10 and the shell 21 was performed for a compressor 20 in which the flange skirt 11 of the main bearing 10 is made of normal gray cast iron and a compressor 20 having the alloy layer of the present embodiment, respectively. The anti-falling test device comprises a support base 31, a pump body assembly of the compressor 20, a shell 21 of the compressor 20 and a pressing plate 30. The pump body assembly comprises a main bearing 10 and a shell 21 of a compressor 20, wherein the pump body assembly is installed in the shell 21, and a flange skirt 11 of the main bearing 10 and the shell 21 are fixed together through laser penetration welding. The pressing plate 30 presses against the upper end of the housing 21.

As shown in fig. 9, the installed compressor 20 is placed on the support pedestal 31, wherein the support pedestal 31 supports the bottom of the main bearing 10, and the support pedestal 31 does not contact the housing 21. The pressing plate 30 is placed at the upper end of the shell 21, the lower end of the pressing plate 30 is in contact with the upper end of the shell 21, downward force is applied to the pressing plate to indirectly apply downward force to the shell 21, the shell 21 has downward movement trend under the downward force applied by the pressing plate 30, at the moment, the lower end of the main bearing 10 is kept motionless under the support of the support base 31, at the moment, the welding part between the main bearing 10 and the shell 21 is subjected to tangential force in the vertical direction, and under the condition that the tangential force reaches the maximum tangential force which can be born by the welding part, the shell 21 and the main bearing 10 are split at the welding part. Through experiments, the obtained lifting data of the falling force show that the connection capability of the main bearing 10 and the shell 21 of the alloy coating 12 sprayed on the outer wall of the flange skirt 11 on the basis of a gray cast iron matrix through an atmospheric plasma process is obviously improved. Wherein the axial force that can be tolerated by the compressor 20 with the alloy coating 12 is raised by about 37.7% compared to the axial force that can be tolerated by the compressor 20 without the alloy coating 12.

As shown in table 1 below, the compressor 20 before and after the alloy coating 12 was sprayed on the flange skirt 11 of the main bearing 10 by the process of the present embodiment was subjected to the laser penetration welding anti-drop force test, and the compressor 20 having the alloy coating 12 with different compositions was subjected to the anti-drop force test, respectively, to obtain the anti-drop force of the laser penetration welding between the main bearing 10 and the housing 21 of the compressor 20 and the anti-drop force of the laser penetration welding between the main bearing 10 and the housing 21 having the alloy coating 12 with different compositions after the laser penetration welding of the non-alloy coating.

As is clear from table 1, in the case of the compressor 20 without the alloy coating layer, when the downward pressure applied to the platen 30 reaches 21.9KN, the welded portion between the housing 21 and the main bearing 10 of the compressor 20 is damaged, and the main bearing 10 and the housing 21 are split. After the alloy coating 12 in this embodiment was sprayed onto the flange skirt 11 by the atmospheric plasma spraying technique, the carbon content was less than 0.1%, the manganese content was less than 0.4%, the phosphorus content was less than 0.025%, the sulfur content was less than 0.02%, and the balance was iron, and the downward pressure was applied by the platen 30, and the main bearing 10 was separated from the housing 21 at 25.26KN, and the anti-dropping capability was improved by 15.34% as compared with the non-alloy coating. With the continuous increase of the weight parts of all components except iron in the alloy coating 12, the anti-falling force of the welding part of the main bearing 10 and the shell 21 is gradually increased, and under the conditions that the carbon content is 0.12%, the manganese content is 0.44%, the phosphorus content is 0.029%, the sulfur content is 0.023% and the balance is iron, the anti-falling force of the welding part of the main bearing 10 and the shell 21 reaches the maximum value of 30.1KN, and compared with the non-alloy coating, the anti-falling force of the welding part of the main bearing 10 and the shell 21 is improved by 37.44%. Under the condition that the weight ratio of the components except iron in the alloy coating 12 is continuously increased, the anti-falling force of the welding position of the main bearing 10 and the shell 21 starts to decrease until the carbon content is more than 0.15%, the manganese content is more than 0.5%, the phosphorus content is more than 0.035%, the sulfur content is more than 0.025%, and the balance is iron, the anti-falling force of the welding position of the main bearing 10 and the shell 21 is 26.43KN, and the anti-falling force of the welding position of the main bearing 10 and the shell 21 is 25.26KN under the conditions that the carbon content is less than 0.1%, the manganese content is less than 0.4%, the phosphorus content is less than 0.025%, the sulfur content is less than 0.02%, and the balance is iron and unavoidable impurities. The alloy coating comprises 0.1 to 0.15 percent of carbon, 0.4 to 0.5 percent of manganese, 0.025 to 0.035 percent of phosphorus, 0.02 to 0.025 percent of sulfur and the balance of iron in parts by weight, and can obtain better anti-falling capability.

TABLE 1

And (2) testing II:

Referring to fig. 10, in the embodiment of the present disclosure, the adhesion of the alloy coating 12 on the surface of the main bearing 10 is tested by spraying the alloy coating 12 with different composition ratios on the main bearing 10 through an atmospheric plasma process. The device for testing the adhesive force of the alloy coating 12 comprises a fixed base 32, a fixed screw 33 and a connecting bolt 35. The fixing base 32 is used for fixing the main bearing 10, the fixing screw 33 is used for connecting the fixing base 32 and the main bearing 10, and the connecting bolt 35 is used for connecting the force applying device and the alloy coating 12.

As shown in fig. 10, the main bearing 10 having the alloy coating 12 is placed in the stationary base 32, and the stationary base 32 is stationary. The main body of the main bearing 10 is fixedly connected with the fixed base 32 through the fixed screw 33, the fixed base 32 is fixedly connected with the base or the ground, at least part of the alloy coating 12 of the main bearing 10 is exposed, and the exposed alloy coating 12 is fixedly connected with the connecting bolt 35 through the glue joint 34. An upward pulling force is applied to the connecting bolt 35 as indicated by the arrow direction in fig. 10 until the alloy coating 12 falls off, resulting in the maximum adhesion of the alloy coating 12.

TABLE 2

Table 2 above shows the test data for the adhesion of the alloy coating 12, which is a table of the adhesion of the alloy coating 12 under different compositions and the increase/decrease law.

As is clear from Table 2, the comparison was made with the carbon content of 0.1%, the manganese content of 0.4%, the phosphorus content of 0.025%, the sulfur content of 0.02% and the balance being iron. In the case of less than 0.1% carbon, less than 0.4% manganese, less than 0.025% phosphorus, less than 0.02% sulfur, and the balance iron, the adhesion 41.96KN of the alloy coating 12 is less than 47.57 of the alloy coating 12 with 0.1% carbon, 0.4% manganese, 0.025% phosphorus, 0.02% sulfur, and the balance iron, reduced by about 11.8%. With the increase of the content of each component except iron, the adhesive force of the alloy coating 12 is gradually increased, and under the conditions that the carbon content is 0.12%, the manganese content is 0.44%, the phosphorus content is 0.029%, the sulfur content is 0.023%, and the balance is iron, the adhesive force of the alloy coating 12 reaches the maximum, and compared with the conditions that the carbon content is 0.1%, the manganese content is 0.4%, the phosphorus content is 0.025%, the sulfur content is 0.02%, and the balance is iron, the adhesive force of the alloy coating 12 is increased by 5.1%, and then with the increase of the content of the other components except iron, the adhesive force of the alloy coating 12 is gradually reduced until the carbon content is more than 0.15%, the manganese content is more than 0.5%, the phosphorus content is more than 0.035%, the sulfur content is 0.025%, and the balance is iron, the adhesive force of the alloy coating 12 is reduced to 43.91KN and less than 47.57KN.

As shown in conjunction with fig. 1-8, embodiments of the present disclosure provide an air conditioner including a compressor 20 as in any of the above embodiments.

The air conditioner provided in the embodiments of the present disclosure has all the benefits of the compressor 20 of any one of the above embodiments because it includes the compressor 20 of any one of the above embodiments, and is not described in detail herein.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other modifications. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others.

Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this disclosure is meant to encompass any and all possible combinations of one or more of the associated listed.

Furthermore, when used in the present disclosure, the terms "comprises," "comprising," and/or variations thereof, mean that the recited features, integers, steps, operations, elements, and/or components are present, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus that includes the element.

In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.

The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A main bearing for a compressor, comprising:

the flange skirt is arranged on the periphery of the main bearing outer ring and protrudes outwards, and the main bearing outer ring is made of metal;

the alloy coating is coated on the outer side wall of the flange skirt through an atmospheric plasma spraying process;

Wherein the alloy coating comprises carbon, manganese, phosphorus, sulfur and iron.

2. The main bearing for a compressor according to claim 1, wherein the alloy coating comprises, in parts by weight:

0.1 to 0.15% carbon, 0.4 to 0.5% manganese, 0.025 to 0.035% phosphorus, 0.02 to 0.025% sulfur, and 99% or more iron.

3. The main bearing for a compressor according to claim 1, wherein,

The alloy coating comprises 0.12% by weight of carbon, 0.44% by weight of manganese, 0.029% by weight of phosphorus, 0.023% by weight of sulfur and the balance iron.

4. The main bearing for a compressor according to claim 1, wherein,

The alloy coating thickness H1 is 2mm to 3mm.

5. A compressor, comprising:

a housing defining a compressor interior installation space;

a main bearing for a compressor as claimed in any one of claims 1 to 4, mounted within the housing;

Wherein the flange skirt edge is fixedly connected with the inner wall of the shell through an alloy coating by a laser penetration welding process.

6. The compressor of claim 5, wherein,

The distance H2 between the outer wall of the flange skirt and the corresponding inner wall of the shell is 0.08mm to 0.12mm.

7. The compressor of claim 5, wherein,

The laser penetration welding point of the flange skirt and the shell is more than 3.

8. The compressor of claim 7, wherein,

In the case where the laser penetration welding extends in the axial direction of the housing, the length L1 of the laser penetration welding is 0.5 to 0.8 times the length H of the flange skirt in the axial direction;

in the case where the laser penetration welding extends along the circumferential direction of the housing, the length L1 of the laser penetration welding is 0.05 times to 0.1 times the outer circumference of the corresponding housing.

9. A compressor according to any one of claims 5 to 8, wherein,

The penetration delta of the laser welding part in the alloy coating is 1mm to 1.5mm.

10. An air conditioner, comprising:

A compressor as claimed in any one of claims 5 to 9.