CN207999365U - Compressor crank shaft and compressor - Google Patents

Abstract

A kind of compressor crank shaft of the utility model offer and compressor, including sequentially connected long axis, eccentric shaft and short axle.The long axis and the short axle are coaxial, and the eccentric shaft and the long axis and short axle be not coaxial, and the eccentric shaft is opened up on an end face of the short axle there are one the first spron, and the size range of first spron is D₁₀≤d₁<D₁≤1.2D₁₀, wherein the d₁For the minimum outer diameter of the first spron, the D₁For the maximum outside diameter of the first spron, the D₁₀To offer the first escape, the D at the outer diameter of short axle or the short axle position adjacent with an end face of the short axle₁₀For the outer diameter of first escape.The compressor crank shaft and compressor can increase short axle flexibility, effectively reduce the maximum stress of short axle and eccentric shaft connection place, and then the reliability of compressor crank shaft can be improved.

Description

Compressor crank shaft and compressor

Technical field

The utility model is related to Compressor Technology field, more particularly to a kind of compressor crank shaft and compressor.

Background technology

Compressor is a kind of fluid machine that low pressure refrigerant gas is promoted to higher pressure refrigerant gas in refrigeration systems Tool.It sucks the refrigerant gas of low-temp low-pressure from air intake duct, is operated by motor after being compressed to it with piston, to row The refrigerant gas of high temperature and pressure is discharged in tracheae, and power is provided for refrigeration cycle.

Compressor crank shaft is one of core component of movement of compressor, and with base bearing, cylinder, slide plate, supplementary bearing etc. It is combined into the movement of compressor.With reference to figure 1, Fig. 1 is the schematic cross-sectional view of the movement of compressor in the prior art, the compression Machine crankshaft 110 includes sequentially connected long axis 111, eccentric shaft 112 and short axle 113, and the long axis 111 and short axle 113 are coaxial, institute State eccentric shaft 112 and 113 eccentric setting of the long axis 111 and short axle.The internal diameter of the base bearing 120 and supplementary bearing 130 is distinguished Coordinate with the long axis 111 and short axle 113.The base bearing 120 and supplementary bearing 130 are used to provide radial support power, described Radial support power is for resisting the power acted in compressor operation on eccentric shaft 112.One end face of the supplementary bearing 130 with Thrust surface 140 on eccentric shaft 112 coordinates, downward to resist movement dead weight and motor to provide axial support to entire movement Skew component.

Since the area of the thrust surface 140 on eccentric shaft 112 is small, the face pressure on thrust surface 140 is larger, and is transported in compressor The oil condition turned in journey on thrust surface 140 is severe, and therefore, thrust surface 140 is to be easiest to wear out failure occur on compressor One of position.Further, since eccentric shaft 112 is placed between base bearing 120 and supplementary bearing 130, and supplementary bearing 130 and short axle 113 intensity is significantly lower than base bearing 120 and long axis 111, when compressor runs well, 110 maximum stress of compressor crank shaft Appear in short axle 113 and 112 adjacent of eccentric shaft.Thrust surface can be influenced by appearing in deformation caused by the stress of 113 root of short axle The formation of oil film at 140 flatness and thrust surface 140, therefore the wear out failure of thrust surface 140 can be accelerated.

Currently, usually by increasing the flexibility of supplementary bearing 130, such as spron is set on supplementary bearing 130, to slow down or Person avoids 140 accelerated wear test of thrust surface, but the contact area of thrust surface 140 can be sacrificed while increasing spron, makes thrust The pressure of contact surface on face 140 increases, and then the reliability of thrust surface 140 is made to reduce.

Utility model content

The purpose of this utility model is to provide a kind of compressor crank shaft and compressors, to solve existing compressor crank shaft The problem easy to wear with the thrust surface of compressor.

In order to solve the above technical problems, the utility model provides a kind of compressor crank shaft, including sequentially connected long axis, partially Mandrel and short axle, the long axis and the short axle are coaxial, and the eccentric shaft and the long axis and short axle be not coaxial, the eccentric shaft The size range of first spron there are one being opened up on an end face of the short axle, first spron is D₁₀≤d₁ <D₁≤1.2D₁₀, wherein the d₁For the minimum outer diameter of the first spron, the D₁It is described for the maximum outside diameter of the first spron D₁₀For the outer diameter of short axle;Or at the short axle position adjacent with an end face of the short axle on offer the first withdrawing Slot, the D₁₀For the outer diameter of first escape.

Optionally, first spron is opened from an end face of the short axle to another end face close to the short axle If.

Optionally, first spron is opened from an end face of the short axle to another end face close to the short axle If depth be less than the short axle an end face minimum outer diameter 1/3.

Optionally, the radial section of first spron is in a ring.

Optionally, the axial cross section of first spron can be arc, flat shape with rounded corners for U-shaped, V-type, bottom One kind in shape.

Optionally, the second spron there are one being opened up on another end face of the eccentric shaft far from the short axle, it is described Second spron is opened up from another end face of the short axle to an end face close to the short axle.

Optionally, the size range of second spron is D₂₀≤d₂<D₂≤1.2D₂₀, wherein the D₂₀For long axis Outer diameter, the d₂For the minimum outer diameter of the second spron, the D₂For the maximum outside diameter of the second spron;Or the long axis with Another end face of the short axle offers the second escape, the D at adjacent position₂₀For the outer of second escape Diameter.

Optionally, the axial cross section of second spron can be arc, flat shape with rounded corners for U-shaped, V-type, bottom One kind in shape.

Optionally, the radial section of second spron is in a ring.

The utility model also provides a kind of compressor, including base bearing, supplementary bearing and above-mentioned compressor crank shaft, the master The internal diameter of bearing and supplementary bearing matches with the long axis and short axle respectively, an end face and the supplementary bearing of the eccentric shaft Match, another end face and the base bearing of the eccentric shaft match.

A kind of compressor crank shaft and compressor provided by the utility model, have the advantages that:

By opening up the first spron on the first thrust surface, and the size range of first spron is D₁₀≤d₁< D₁≤1.2D₁₀, wherein the D₁₀For the outer diameter of short axle, alternatively, when the short axle position adjacent with an end face of the short axle The first escape, the D are offered in the place of setting₁₀For the outer diameter of first escape, the d₁For the minimum of the first spron Outer diameter, the D₁It for the maximum outside diameter of the first spron, thus can increase short axle flexibility, effectively reduce short axle and eccentric axis connection The maximum stress at place, and then the reliability of compressor crank shaft can be improved, and the first spron has effectively obstructed short axle and bias The influence of maximum stress pair the first thrust surface flatness of shaft connection place, and then the first thrust surface of compressor crank shaft can be reduced Risk easy to wear.

Description of the drawings

Fig. 1 is the schematic cross-sectional view of the movement of compressor in the prior art;

Fig. 2 is the structural schematic diagram of the compressor crank shaft in a kind of embodiment of the utility model;

Fig. 3 is the close-up schematic view of the compressor crank shaft in Fig. 2;

Fig. 4 is the close-up schematic view of the compressor crank shaft in the utility model another kind embodiment.

Reference sign:

110- compressor crank shafts;111- long axis;112- eccentric shafts;113- short axles;120- base bearings;130- supplementary bearings; 140- thrust surfaces;

220- compressor crank shafts;221- long axis;222- eccentric shafts;223- short axles;The first sprons of 224-;225- first stops Pushing surface;The second thrust surfaces of 226-;The first escapes of 227-.

Specific implementation mode

Below in conjunction with the drawings and specific embodiments to the utility model proposes compressor crank shaft and compressor make it is further It is described in detail.According to following explanation and claims, will be become apparent from feature the advantages of the utility model.It should be noted that Attached drawing is all made of very simplified form and uses non-accurate ratio, only to it is convenient, lucidly aid in illustrating this practicality The purpose of new embodiment.

The present embodiment provides a kind of compressor crank shafts.Referring to figs. 2 and 3, Fig. 2 is in a kind of embodiment of the utility model The structural schematic diagram of compressor crank shaft, Fig. 3 are the close-up schematic view of the compressor crank shaft in Fig. 2, the compressor crank shaft 220 include sequentially connected long axis 221, eccentric shaft 222 and short axle 223.Wherein, the long axis 221 and the short axle 223 are same Axis, the eccentric shaft 222 and the long axis 221 and short axle 223 be not coaxial.The eccentric shaft 222 close to the short axle 223 one First spron 224 there are one extending on a end face.

Below for sake of convenience, an end face of the short axle 223 is referred to as the first thrust surface 225, by the short axle 223 another end face is referred to as the second thrust surface 226.When compressor operation, and first thrust surface 225 and second stops When pushing surface 226 is respectively in contact with supplementary bearing and base bearing, first thrust surface, 225 and second thrust surface 226 can be by To axial active force.

With reference to figure 3, the size range of first spron 224 is D₁₀≤d₁<D₁≤1.2D₁₀, wherein the D₁₀It is short The outer diameter of axis 223, the d₁For the minimum outer diameter of the first spron 224, the D₁For the maximum outside diameter of the first spron 224. In other embodiments, with reference to figure 4, Fig. 4 is that the partial enlargement of the compressor crank shaft in the utility model another kind embodiment shows It is intended to, when offering the first escape at the position adjacent with first thrust surface 225 when the short axle 223, the D₁₀For The outer diameter of first escape.

In the present embodiment, by opening up the first spron 224, and first spron 224 on the first thrust surface 225 Size range be D₁₀≤d₁<D₁≤1.2D₁₀, wherein the D₁₀For the outer diameter of short axle 223, the d₁For the first spron 224 Minimum outer diameter, the D₁For the maximum outside diameter of the first spron 224, it thus can increase by 223 flexibility of short axle, effectively reduce short axle 223 with the maximum stress of 222 junction of eccentric shaft, and then the reliability of compressor crank shaft 220 can be improved, and the first spron 224 have effectively obstructed the influence of short axle 223 and 225 flatness of the first thrust surface of maximum stress pair of 222 junction of eccentric shaft, into And the risk that the first thrust surface 225 that can reduce compressor crank shaft 220 is easy to wear.

Following table is data of the compressor crank shaft 220 when carrying out finite element analysis in the present embodiment, with existing compression Machine crankshaft 220 is compared, and the local maxima stress of short axle 223 can be effectively reduced by the way that the first spron 224 is arranged in the present embodiment, Maximum stress at its short-and-medium axle 223 reduces about 40%, and the maximum stress of entire compressor crank shaft 220 reduces about 29%.

In the present embodiment, the radial section of first spron 224 is preferably in a ring.

First spron 224 is from an end face of the short axle 223 to close to another end face of the short axle 223 It opens up.Axial direction of first spron 224 preferably along the short axle 223 opens up.

Preferably, with reference to figure 3, the axial cross section of first spron 224 is U-shaped.Certainly, first spron 224 can also be other shapes, and for example, V-type, bottom are in arc (wait radiuses or become radius), flat bottom shape with rounded corners One kind, it is numerous to list herein.

Preferably, first spron 224 is opened from first thrust surface 225 to close to second thrust surface 226 If depth be less than first thrust surface 225 minimum outer diameter 1/3.For example, when first thrust surface 225 is circle, And the center of circle and the short axle 223 are coaxial, a diameter of 21mm of first thrust surface 225, then first spron 224 is from institute It states the first thrust surface 225 and should be less than 7mm to the depth opened up close to second thrust surface 226.

Preferably, the second unloading there are one being opened up on another end face of the eccentric shaft 222 far from the short axle 223 Slot.Second spron is opened up from another end face of the short axle 223 to close to an end face of the short axle 223, i.e., Offer the second spron on second thrust surface 226, and second spron is from the second thrust of the short axle 223 Face 226 is opened up to close to the direction of first thrust surface 225.

The radial section of second spron is preferably in a ring.

Preferably, the size range of second spron is D₂₀≤d₂<D₂≤1.2D₂₀, wherein the D₂₀For long axis 221 Outer diameter, the d₂For the minimum outer diameter of the second spron, the D₂For the maximum outside diameter of the second spron.Implement in others In example, when offering the second escape at the position adjacent with second thrust surface 226 when the long axis 221, the D₂₀For The outer diameter of second escape.

Preferably, the axial cross section of second spron can be that arc (waits radiuses or becomes partly for U-shaped, V-type, bottom Diameter), one kind in flat bottom shape with rounded corners.

Preferably, second spron is opened up from second thrust surface 226 to close first thrust surface 225 Depth is less than the 1/3 of the minimum outer diameter of second thrust surface 226.For example, when second thrust surface 226 is circle, and it is round The heart and the short axle 223 are coaxial, a diameter of 21mm of second thrust surface 226, then second spron is from described second Thrust surface 226 should be less than 7mm to the depth opened up close to first thrust surface 225.

In the present embodiment, by opening up the second spron, and the size of second spron on the second thrust surface 226 Ranging from D₂₀≤d₂<D₂≤1.2D₂₀, wherein the D₂₀For the outer diameter of long axis 221, the d₂It is outer for the minimum of the second spron Diameter, the D₂It for the maximum outside diameter of the second spron, thus can increase the flexibility of long axis 221, effectively reduce long axis 221 and bias The maximum stress of 222 junction of axis, and then the reliability of compressor crank shaft 220 can be improved, and the second spron effectively obstructs The influence of long axis 221 and the second thrust surface of maximum stress pair 226 flatness of 222 junction of eccentric shaft, and then can reduce Second thrust surface 226 of compressor crank shaft 220 risk easy to wear.

The utility model also provides a kind of compressor, including base bearing, supplementary bearing and above-mentioned compressor crank shaft 220, institute The internal diameter for stating base bearing and supplementary bearing matches with the long axis 221 and short axle 223 respectively, an end of the eccentric shaft 222 Face matches with the supplementary bearing, and another end face and the base bearing of the eccentric shaft match.

Foregoing description is only the description to the utility model preferred embodiment, not to any limit of the scope of the utility model Calmly, any change, the modification that the those of ordinary skill in the utility model field does according to the disclosure above content, belong to right and want Seek the protection domain of book.

Claims (10)

1. a kind of compressor crank shaft, which is characterized in that including sequentially connected long axis, eccentric shaft and short axle, the long axis and institute It is coaxial to state short axle, the eccentric shaft and the long axis and short axle be not coaxial, and the eccentric shaft is close to an end face of the short axle On open up there are one the first spron, the size range of first spron is D₁₀≤d₁<D₁≤1.2D₁₀,

Wherein, the d₁For the minimum outer diameter of the first spron, the D₁For the maximum outside diameter of the first spron, the D₁₀It is short The outer diameter of axis;Or

The first escape, the D are offered at the short axle position adjacent with an end face of the short axle₁₀It is described The outer diameter of one escape.

2. compressor crank shaft as described in claim 1, which is characterized in that first spron is held from one of the short axle It is opened up towards another end face close to the short axle.

3. compressor crank shaft as claimed in claim 2, which is characterized in that first spron is held from one of the short axle It is less than the 1/3 of the minimum outer diameter of an end face of the short axle towards the depth opened up close to another end face of the short axle.

4. compressor crank shaft as described in claim 1, which is characterized in that the radial section of first spron is in a ring.

5. compressor crank shaft as described in claim 1, which is characterized in that the axial cross section of first spron can be it is U-shaped, V-type, bottom are one kind in arc, flat bottom shape with rounded corners.

6. compressor crank shaft as described in claim 1, which is characterized in that another end of the eccentric shaft far from the short axle Second spron there are one being opened up on face, second spron is from another end face of the short axle to close to the short axle One end face opens up.

7. compressor crank shaft as claimed in claim 6, which is characterized in that the size range of second spron is D₂₀≤d₂ <D₂≤1.2D₂₀, wherein the D₂₀For the outer diameter of long axis, the d₂For the minimum outer diameter of the second spron, the D₂It is second The maximum outside diameter of spron;Or

The second escape, the D are offered at the long axis position adjacent with another end face of the short axle₂₀It is described The outer diameter of two escapes.

8. compressor crank shaft as claimed in claim 6, which is characterized in that the axial cross section of second spron can be it is U-shaped, V-type, bottom are one kind in arc, flat bottom shape with rounded corners.

9. compressor crank shaft as claimed in claim 6, which is characterized in that the radial section of second spron is in a ring.

10. a kind of compressor, which is characterized in that including base bearing, supplementary bearing and pressure as described in any one of claim 1 to 9 The internal diameter of contracting machine crankshaft, the base bearing and supplementary bearing matches with the long axis and short axle respectively, one of the eccentric shaft End face matches with the supplementary bearing, and another end face and the base bearing of the eccentric shaft match.