CN205715229U - Compressor - Google Patents

Abstract

The open a kind of compressor of this utility model, including bent axle and upper bearing (metal), the major axis of bent axle is arranged in upper bearing (metal), and the lower surface of upper bearing (metal) is formed flexible slot, offers cannelure on the outer surface of bent axle or on the inner hole wall of upper bearing (metal).Cannelure in this utility model cooperates with flexible slot, the major axis lower end of bent axle and the distribution of contact of upper bearing (metal) lower end can be improved, make the distribution of upper bearing (metal) load more reasonable, solve the wear problem between huge discharge twin-tub or the major axis of multi-cylinder rotor type compressor crankshaft and upper bearing (metal), improve the service life of compressor, there is the feature of simple in construction, low cost.

Description

Compressor

Technical field

This utility model relates to art of refrigeration units, in particular to a kind of compressor.

Background technology

The Chinese patent of Application No. CN201280046093.0 discloses a kind of rotor compressor, this rotor compressor Flexible groove structure it is formed with, owing to the rigidity of this flexibility cell wall (elastic) is less than the firm of the flexible cell wall of upper flange on lower flange Degree, therefore, can effectively solve bent axle minor axis diameter less than the wear problem between bent axle short axle during major diameter and lower flange.But It is that the applicable situation of this patent application is relatively limited, it is impossible to solve the wear problem between length and the upper bearing (metal) of bent axle.

Utility model content

Thering is provided the compressor of a kind of simple in construction, low cost in this utility model embodiment, it can solve the major axis of bent axle And the wear problem between upper bearing (metal), extends compressor service life.

For achieving the above object, this utility model embodiment provides a kind of compressor, including bent axle and upper bearing (metal), described song The major axis of axle is arranged in described upper bearing (metal), and the lower surface of described upper bearing (metal) is formed flexible slot, the outer surface of described bent axle Above or offer cannelure on the inner hole wall of described upper bearing (metal).

As preferably, described cannelure has the central plane of the axis being perpendicular to described upper bearing (metal), and described cannelure exists The development length of described central plane both sides is identical, the distance between described central plane and the described lower surface of described upper bearing (metal) Meet following relation:

H1=(1-1.3) H0；

Wherein, H1 is the distance between described central plane and the described lower surface of described upper bearing (metal), and H0 is described flexibility The degree of depth of groove.

As preferably, described cannelure is at the width that development length sum is described cannelure of described central plane both sides Degree, the width of described cannelure meets following relation:

A=(0.3-0.6) H0；

Wherein, A is described width, and H0 is the degree of depth of described flexible slot.

As preferably, the degree of depth of described cannelure is 0.2-1mm.

Cannelure in this utility model cooperates with flexible slot, can improve major axis lower end and the upper bearing (metal) lower end of bent axle Distribution of contact, make the distribution of upper bearing (metal) load more reasonable, solve huge discharge twin-tub or multi-cylinder rotor type compressor crankshaft Major axis and upper bearing (metal) between wear problem, improve the service life of compressor, there is the spy of simple in construction, low cost Point.

Accompanying drawing explanation

Fig. 1 is the structural representation of rotor-type compressor；

Fig. 2 is bent axle major axis of the prior art and upper bearing (metal) stress distribution schematic diagram；

Fig. 3 is the pump assembly profilograph in this utility model first embodiment；

Fig. 4 is the crankshaft structure schematic diagram in this utility model first embodiment；

Fig. 5 is the pump group assembly profilograph in this utility model the second embodiment；

Fig. 6 is the crankshaft structure schematic diagram in this utility model the second embodiment；

Fig. 7 is the bent axle major axis in this utility model and upper bearing (metal) stress distribution schematic diagram.

Description of reference numerals: 1, bent axle；2, upper bearing (metal)；3, flexible slot；4, cannelure；5, seal casinghousing；6, rotor；7, inclined Cardiac prominence is taken turns；8, roller；9, lower bearing；10, cylinder；11, suction tube；12, liquor separator；13, central plane.

Detailed description of the invention

With specific embodiment, this utility model is described in further detail below in conjunction with the accompanying drawings, but not as to this practicality Novel restriction.

Fig. 1 shows the structural representation of a kind of rotor-type compressor.As it is shown in figure 1, be provided with electricity in seal casinghousing 5 Machine portion and pump assembly, wherein, motor section is for driving element, and pump assembly is compression mechanism.The rotor 6 of motor section connects the pump housing The major axis of the bent axle 1 of assembly, the eccentric cam 7 of bent axle 1 is arranged with roller 8.The major and minor axis of bent axle 1 is respectively equipped with upper bearing (metal) 2 It is used for supporting bent axle 1 with lower bearing 9, upper bearing (metal) 2 and lower bearing 9.Bent axle 1 rotates under the driving of the rotor 6 of motor section, and it is inclined Cardiac prominence wheel 7 also drives roller 8 to do eccentric rotary in the cylinder chamber of cylinder 10, thus completes the work of compression refrigerant.Cylinder 10 By suction tube 11, sucking refrigerant gas at liquor separator 12, the coolant in cylinder chamber is transferred to high pressure by low pressure, reaches a level pressure During power, discharge cylinder chamber with air vent.

When compressor operation, in cylinder chamber under the effect of the active force such as gas load, bent axle 1 bends, and it is long Axle contacts with upper bearing (metal), short axle contacts with lower bearing.Owing to the flexible cell wall at upper bearing (metal) produces elastic deformation, make bent axle 1 Form face between long and short axle with upper bearing (metal) 2, lower bearing 9 to contact rather than point cantact, therefore, it is possible to reduce bent axle 1 and upper and lower axle Contact stress between holding.

It is found by the applicant that, although use the flexible groove structure in Fig. 1 can effectively solve bent axle minor axis diameter straight less than major axis Wear problem between the short axle of bent axle and lower flange during footpath, but huge discharge twin-tub or the bearing span of multi-cylinder rotor-type compressor When (i.e. upper bearing (metal) lower surface is bearing span to the distance of lower bearing upper surface) is bigger, the lower end of the major axis of bent axle and upper bearing (metal) The distribution of contact of lower end can produce bigger change (such as Fig. 2).

As in figure 2 it is shown, the situation that the stress of the supporting region of upper bearing (metal) bottom is concentrated can produce deterioration, the most easily make bent axle Major axis and upper bearing (metal) generation inordinate wear, produce extraordinary noise, more seriously can affect the life-span of compressor.

For solving the problems referred to above, this utility model provides a kind of compressor, particularly a kind of rotor compressor.

Refer to Fig. 3 to Fig. 6, the compressor in this utility model is provided with motor section and the pump housing in being included in seal casinghousing Assembly, motor section drives pump assembly to move.Wherein, pump assembly includes bent axle 1, upper bearing (metal) 2 and lower bearing 9, bent axle 1 Major axis be arranged in upper bearing (metal) 2, short axle is arranged in lower bearing 9.Wherein, the lower surface of upper bearing (metal) 2 is formed with flexible slot 3, and on the outer surface of bent axle 1 or on the inner hole wall of upper bearing (metal) 2, offer cannelure 4.

Cannelure 4 in this utility model cooperates with flexible slot 3, can improve major axis lower end and the upper bearing (metal) 2 of bent axle 1 The distribution of contact of lower end, makes the distribution of upper bearing (metal) load more reasonable, solves huge discharge twin-tub or multi-cylinder rotor-type compressor Wear problem between major axis and the upper bearing (metal) of bent axle, improve the service life of compressor, has simple in construction, low cost Feature.

Refer to Fig. 3, in first embodiment of the present utility model, cannelure 4 is arranged on the outer surface of bent axle 1； Refer to Fig. 5, in second embodiment of the present utility model, cannelure 4 can also be arranged in the endoporus of upper bearing (metal) 2.

As shown in Figure 4, the cannelure 4 in this utility model has the central plane 13 of the axis being perpendicular to upper bearing (metal) 2, should Central plane 13 is the widthwise central of cannelure 4, and i.e. cannelure 4 is in the upside of central plane 13 and the upwardly extending length of lower side Spend identical.

Refer to Fig. 3 and Fig. 5, the distance between central plane 13 and the lower surface of upper bearing (metal) 2 in this utility model is full Be enough to lower relation:

H1=(1-1.3) H0；

Wherein, H1 is the distance between the lower surface of central plane 13 and upper bearing (metal) 2, and H0 is the degree of depth of flexible slot 3.

According to above it will be appreciated that, the development length sum in central plane both sides of the cannelure 4 in this utility model is ring The width of shape groove 4.As shown in Figure 4 and Figure 6, the width of the cannelure 4 in this utility model meets following relation:

A=(0.3-0.6) H0；

Wherein, A is width, and H0 is the degree of depth of flexible slot 3.

As shown in Figure 4 and Figure 6, the depth B of cannelure 4 is preferably 0.2-1mm.

As the mode being more highly preferred to, the widthwise central of the cannelure 4 in this utility model and the face, lower surface of upper bearing (metal) Between distance, the width of cannelure 4 and the degree of depth, the one or more combination in above-mentioned each preferred span can be used, When above three parameter all uses above-mentioned each preferred span, it is possible to obtain preferably effect.

Using the structure in this utility model, can effectively reduce the Max.contact stress of bent axle major axis and upper bearing (metal), it is bent Axial length axle and upper bearing (metal) stress distribution schematic diagram are as it is shown in fig. 7, thus solve bent axle major axis local in existing technology and stress occur The problem concentrated.

Certainly, it is above preferred implementation of the present utility model.It should be pointed out that, the ordinary skill for the art For personnel, on the premise of without departing from this utility model ultimate principle, it is also possible to make some improvements and modifications, these improve It is also considered as protection domain of the present utility model with retouching.

Claims (4)

1. a compressor, it is characterised in that include bent axle (1) and upper bearing (metal) (2), the major axis of described bent axle (1) is arranged on institute In stating upper bearing (metal) (2), the lower surface of described upper bearing (metal) (2) is formed with flexible slot (3), on the outer surface of described bent axle (1) or Cannelure (4) is offered on the inner hole wall of described upper bearing (metal) (2).

Compressor the most according to claim 1, it is characterised in that described cannelure (4) has and is perpendicular to described upper bearing (metal) (2) central plane of axis, the described cannelure (4) development length in described central plane both sides is identical, and described center is put down Distance between the described lower surface of face and described upper bearing (metal) (2) meets following relation:

H1=(1-1.3) H0；

Wherein, H1 is the distance between the described lower surface of described central plane and described upper bearing (metal) (2), and H0 is described flexible slot (3) the degree of depth.

Compressor the most according to claim 2, it is characterised in that described cannelure (4) is in described central plane both sides Development length sum is the width of described cannelure (4), and the width of described cannelure (4) meets following relation:

A=(0.3-0.6) H0；

Wherein, A is described width, and H0 is the degree of depth of described flexible slot (3).

4. according to the compressor described in Claims 2 or 3, it is characterised in that the degree of depth of described cannelure (4) is 0.2-1mm.