CN201437775U - rotary compressor - Google Patents

Abstract

The utility model discloses a rotary compressor, comprising a shell, a liquid reservoir, a stator, a rotor and a pump body, wherein the rotor comprises an iron core and a balance block assembly, and is characterized in that the balance block assembly comprises a static balance block, a dynamic balance block and a rail device for limiting the motion trail of the dynamic balance block, and the static balance block and the dynamic balance block are connected by an elastic connecting component. The utility model has simple structure, can automatically realize the adjustment of the gravity center of the balance block through the change of the moving position of the dynamic balance block when in the rotation of the compressor (frequency conversion), thereby avoiding the vibration produced by the imbalance of the whole compressor caused by the change of the rotation frequency and improving noise.

Description

Rotary compressor

Technical field

The utility model relates to the air condition compressor field.

Background technique

As shown in Figure 1, existing compressor generally is made up of housing 1, liquid-storage container 2, rotor/stator 3 and the pump housing 4, and in addition, as shown in Figure 2, rotor 3 is made up of iron core 31, last equilibrium block assembly 32, following equilibrium block assembly 33.The existing integrated block structure of equilibrium block, as shown in Figure 3 last equilibrium block 32 ' and following equilibrium block 33 '.The Action Specification of balancing rotor piece: because the eccentric structure of bent axle, make the center of gravity of bent axle and running shaft not on same straight line, get certain and analyze in a flash, when bent axle is driven with certain operating frequency rotation, eccentric part is subjected to action of centrifugal force, and the tendency of being got rid of by throwing is to the right arranged.Suppose no balancing rotor piece, the integral body of rotor/pump housing formation will be subjected to force unbalance so, fierce vibration take place, and go to seek new balance, and influence of unbalance power will be delivered to the compressor outside simultaneously, cause the vibration of whole compressor.The effect of equilibrium block promptly by the power and the moment of balance crankshaft eccentric part, makes rotor/pump housing, compressor reach balance about the rotor.

The make a concerted effort ∑ F of integral body on directions X that has only rotor/pump housing to constitute _x, the ∑ F that makes a concerted effort on the Y direction _yM equals zero simultaneously with the resultant moment of force ∑, could realize the dynamic balancing of compressor integral body.

For the constant speed machine, compressor remains certain operating frequency in whole operation process

Running, when the whole dynamic balancing of design compressor, the given fixing quality of equilibrium block up and down, the equilibrium block center of gravity can be so that make a concerted effort ∑ F to the distance of running shaft up and down _x, ∑ F _y, resultant moment of force ∑ M equals zero simultaneously, to realize the dynamic balancing of constant speed machine.

For frequency conversion machine, operating frequency Be variable.Because last/portion's product such as lower bearing fix bent axle along the x substantially horizontal, when about the suffered centrifugal force of equilibrium block, crankshaft eccentric portion with operating frequency

During variation, ∑ F makes a concerted effort _x, ∑ F _yNot influenced by operating frequency

Influence, ∑ F makes a concerted effort _x=0, ∑ F _y=0.But, when the compressor accelerated service, ∑ M＞0; When the compressor decelerate, ∑ M＜0, promptly compressor is whole uneven, and the dynamic balancing of compressor is destroyed.

Influence the whole dynamically balanced factor of compressor, remove operating frequency

Outward, also have mass of balance block, fulcrum arrive stressed distance, and each position center of gravity such as equilibrium block, bent axle are to the distance of running shaft.For quality, be seal container during owing to compressor operation, by changing the quality of each parts, make compressor reach balance, relatively more difficult at present; For fulcrum arrive stressed distance: because the design of rotor/pump housing, each component locations is fixing, and it is changed to reach compressor balance, implements relatively difficulty at present; For the distance of each position position of centre of gravity,, make its change in location to reach difficulty of equilibrium ratio because the design of crankshaft eccentric portion is fixing to running shaft.

Summary of the invention

For addressing the above problem, at the exploitation and the use of at present efficient frequency-changeable compressor, the purpose of this utility model provides a kind of rotary compressor, and it has solved because operating frequency by adjusting the distance of equilibrium block position of centre of gravity to running shaft

The compressor whole machine balancing that causes of variation destroy and the vibration problem that occurs.

The purpose of this utility model is achieved in that a kind of rotary compressor, comprise housing, liquid-storage container, stator, rotor and the pump housing, described rotor comprises iron core and balance block assembly, it is characterized in that: described equilibrium block assembly comprises the track device of deciding equilibrium block, dynamic balancing piece and limiting the dynamic balancing block movement path, decides to connect by elastic coupling element between equilibrium block and the dynamic balancing piece.

Described equilibrium block assembly is arranged on the top of iron core; Perhaps described equilibrium block assembly is arranged on the bottom of iron core; Perhaps, described equilibrium block assembly is two groups of equilibrium block assemblies that are separately positioned on the iron core upper and lower.

Described track device is a guide rod, and it is outer and can slide along guide rod that the dynamic balancing piece is socketed on guide rod, describedly decides equilibrium block and iron core is affixed.

Described track device is a guide groove, and the dynamic balancing piece is located in the guide groove and can be slided along guide groove, and described to decide equilibrium block affixed by guide groove and iron core.

The utility model is simple in structure, and in operation process, the variation of the movement position by the dynamic balancing piece can realize the adjustment of equilibrium block assembly center of gravity automatically at compressor (frequency conversion machine), avoids because operating frequency

Variation cause the vibration that compressor is whole uneven and occur, improve noise.

Description of drawings

Fig. 1 is the structural representation of rotary compressor;

Fig. 2 is the structural representation of compressor drum;

Fig. 3 is the structural representation of equilibrium block of the prior art;

Fig. 4 is the structural representation (state of rest) of the utility model embodiment 1 equilibrium block;

Fig. 5 is the structural representation (state of rest) of the utility model embodiment 2 equilibrium blocks;

Fig. 6 is the structural representation (accelerated service state) of the utility model embodiment 2 equilibrium blocks;

Fig. 7-the 10th, the force analysis figure of the utility model rotor.

Embodiment

Below by accompanying drawing and concrete mode of execution the utility model is further elaborated, but the utility model is not limited to this specific example.

Embodiment 1

As shown in Figure 1, 2, the utility model is a kind of rotary compressor, comprises housing 1, liquid-storage container 2, rotor/stator 3 and the pump housing 4 equally, and rotor 3 is made up of iron core 31, last equilibrium block assembly 32, following equilibrium block assembly 33.

Shown in Fig. 4-6, last equilibrium block assembly 32 comprises the elastic coupling element 323 of deciding equilibrium block 321, dynamic balancing piece 322, connecting both, the track device that reaches qualification dynamic balancing piece 322 movement locus; Following equilibrium block assembly 33 comprises the elastic coupling element 333 of deciding equilibrium block 331, dynamic balancing piece 332 and connecting both, the track device that reaches qualification dynamic balancing piece 332 movement locus.Equilibrium block assembly 32/33 weight is suitable substantially with existing equilibrium block weight, and the weight of deciding equilibrium block 321/331, dynamic balancing piece 322/332 can equate, also can be not wait.The weight of equilibrium block assembly 32/33 requires mainly to concentrate on to decide on equilibrium block 321/331, the dynamic balancing piece 322/332, provides the track device weight of motion as far as possible little.The material of equilibrium block assembly 32/33 can be metals such as copper, iron.Deciding equilibrium block 321/331 can be by riveted joint, mode and iron core 31 relative fixed such as spiral shell is solid, welding decide can be connected by modes such as welding, clamp, penetrate, twine, be pressed between equilibrium block 321/331, dynamic balancing piece 322/332 and the elastic coupling element 323/333.Elastic coupling element 323/333 is a coil tension spring, or the rubber link.It is spherical or block to decide being shaped as of equilibrium block 321/331, dynamic balancing piece 322/332, should smoothly not have sharp angle with the contact position of track device, smooth and easy with the slip of guaranteeing the dynamic balancing piece.Track device be shaped as level and smooth arc, for example be circular arc, the spiral of Archimedes of the different tangent combination of circular arc of the constant circular arc of radius R, a plurality of radius R.

As shown in Figure 4, last equilibrium block assembly 32 comprises the elastic coupling element 323 of deciding equilibrium block 321, dynamic balancing piece 322, connecting both, the track device that reaches qualification dynamic balancing piece 322 movement locus; Following equilibrium block assembly 33 comprises the elastic coupling element 333 of deciding equilibrium block 331, dynamic balancing piece 332 and connecting both, the track device that reaches qualification dynamic balancing piece 332 movement locus.Elastic coupling element 323/333 adopts coil tension spring.Track device in the present embodiment is an arc guide rod 34, and dynamic balancing piece 322/332 is socketed on outside the guide rod 34 and can slides along guide rod 34, and it is affixed with iron core 31 to decide equilibrium block 321/331.

Present embodiment just can be realized the adjustment of equilibrium block assembly center of gravity automatically by the variation of the movement position of dynamic balancing piece 322/332.The vibration of avoiding the whole imbalance of compressor and occurring improves noise.

Embodiment 2

Shown in Fig. 5,6, last equilibrium block assembly 32 comprises the elastic coupling element 323 of deciding equilibrium block 321, dynamic balancing piece 322, connecting both, the track device that reaches qualification dynamic balancing piece 322 movement locus; Following equilibrium block assembly 33 comprises the elastic coupling element 333 of deciding equilibrium block 331, dynamic balancing piece 332 and connecting both, the track device that reaches qualification dynamic balancing piece 332 movement locus.Elastic coupling element 323/333 adopts coil tension spring.Track device in the present embodiment is the guide groove 35 of arc, and dynamic balancing piece 322/332 is located in the guide groove 35 and can be slided along guide groove 35.Guide groove 35 is fixedly installed on the iron core 31, decides equilibrium block 321/331 and is fixed in the guide groove 35.Guide groove 35 be sealed type or open type all can, as long as can limit the movement locus of dynamic balancing piece.

Present embodiment just can be realized the adjustment of equilibrium block assembly center of gravity automatically by the variation of the movement position of dynamic balancing piece 322/332, thereby avoids compressor whole uneven and the vibration that occurs improves noise.

The following describes, with operating frequency

Variation, the variation of equilibrium block group position of centre of gravity up and down, and adjust automatically by position of centre of gravity makes the whole ∑ F of making a concerted effort of compressor _x=0, ∑ F _y=0, resultant moment of force ∑ M=0 realizes whole dynamic balancing.

Up and down the replacement of equilibrium block assembly quality is two substitutional masses on XX ', the YY ' axle, along on the section of XX ' axle, wholely realizes dynamic balancing, also can reach balance along YY ' the axle while, and now describe: as shown in Figure 7, O is a rotation axis points; O ₁Position of centre of gravity for last equilibrium block assembly 32; m ₁Be the substitutional mass of last equilibrium block assembly 32 quality at XX ' axle; m _{1 ⊥}Be the substitutional mass of last equilibrium block assembly 32 quality at YY ' axle, red line partly is quality replacement axle; α _aAngle for quality replacement axle and YY ' axle; O ₂Position of centre of gravity for following equilibrium block assembly 33; m ₂Be the substitutional mass of following equilibrium block group quality at XX ' axle; m _{2 ⊥}For equilibrium block group quality is at the substitutional mass of YY ' axle down, red line partly is quality replacement axle; β _aAngle for quality replacement axle and YY ' axle.

Suppose the tracks radius R of dynamic balancing piece 322 ₁The tracks radius R of=dynamic balancing piece 332 ₂

m ₁' to O ₁Distance=R ₁Cos α _a, m ₁" to O ₁Distance=r ₁Sin α _a

m ₂' to O ₂Distance=R ₁Cos β _a, m ₂" to O ₂Distance=r ₂Sin β _a

Substitutional mass, $m_{1\&perp;}=m_1\frac{r_1\sin {\mathrm{\&alpha;}}_a}{R_1\cos {\mathrm{\&alpha;}}_a}=m_1{\mathrm{<figure-callout\; id="2"\; label="tan"\; filenames="H200920059569XE00011.png,H200920059569XE00043.png"\; state="\{\{state\}\}">tan</figure-callout>}}^2{\mathrm{\&alpha;}}_a,$ ${\mathrm{<figure-callout\; id="2"\; label="m"\; filenames="H200920059569XE00011.png,H200920059569XE00043.png"\; state="\{\{state\}\}">m</figure-callout>}}_{2\&perp;}=m_2\frac{r_1\sin {\mathrm{\&beta;}}_a}{R_1\cos {\mathrm{\&beta;}}_a}={\mathrm{<figure-callout\; id="2"\; label="m"\; filenames="H200920059569XE00011.png,H200920059569XE00043.png"\; state="\{\{state\}\}">m</figure-callout>}}_2{\mathrm{<figure-callout\; id="2"\; label="tan"\; filenames="H200920059569XE00011.png,H200920059569XE00043.png"\; state="\{\{state\}\}">tan</figure-callout>}}^2{\mathrm{\&beta;}}_a$

Along on the section of XX ', r _1a, r _2aGuarantee ∑ F with joint efforts _x=0, ∑ F _y=0, resultant moment of force ∑ M=0.

Now to along on the section of YY ', make a concerted effort, the balance of resultant moment of force describes:

1, on the x substantially horizontal, along the section of YY ', force analysis is as follows: as shown in Figure 8, and F _{1 ⊥}Be the suffered centrifugal force of last equilibrium block,

F _{2 ⊥}Be the following suffered centrifugal force of equilibrium block,

F _⊥' be that last/lower bearing/piston/portion's product such as slide block are exerted oneself to the cooperation of bent axle.

The x substantially horizontal is made a concerted effort

2, on the y Vertical direction, along the section of YY ', force analysis is as follows: as shown in Figure 9, N ' is the suffered holding power of rotor/bent axle; The y Vertical direction ∑ F that makes a concerted effort _y=m _{1 ⊥}G+m _{2 ⊥}G+m ₄G+m ₅G-N '

More than comprehensive, because last/portion's product such as lower bearing fix bent axle along x substantially horizontal, y Vertical direction, the x substantially horizontal, the suffered centrifugal force of equilibrium block is with operating frequency up and down

During variation, F _⊥' also with

Variation and change, each power acting in conjunction simultaneously makes the ∑ F that makes a concerted effort _x=0; The y Vertical direction, because this direction bent axle is stressed static, so ∑ F _y=0.

3, moment, along the section of YY ', torque analysis is as follows: as shown in figure 10, O ' is a fulcrum, supposes anticlockwise moment for just, clockwise moment is negative resultant moment of force, ∑ M=-F _{1 ⊥}l ₁+ F _{2 ⊥}l ₂+ F _⊥' l ₃-m _{1 ⊥}GR ₁+ m _{2 ⊥}GR ₁, with ∑ F _x=0 substitution, promptly

When acceleration mode,

Big more, centrifugal force is big more, but dynamic balancing piece 322/332 also departed from more and decided equilibrium block 321/331, the position of centre of gravity O of equilibrium block assembly 32 on this moment this moment ₁With rotation axis points O apart from r _1a, the following position of centre of gravity O of equilibrium block group ₂With rotation axis points O apart from r _2aJust short more, the angle α of quality replacement axle and YY ' axle _a, β _aJust more little.Thereby realize automatic regulatory function, guarantee ∑ F with joint efforts _x=0, ∑ F _y=0, resultant moment of force ∑ M=0.

Claims (10)

1. rotary compressor, comprise housing, liquid-storage container, stator, rotor and the pump housing, described rotor comprises iron core and balance block assembly, it is characterized in that: described equilibrium block assembly comprises the track device of deciding equilibrium block, dynamic balancing piece and limiting the dynamic balancing block movement path, decides to connect by elastic coupling element between equilibrium block and the dynamic balancing piece.

2. rotary compressor according to claim 1 is characterized in that: described equilibrium block assembly is arranged on the top of iron core.

3. rotary compressor according to claim 1 is characterized in that: described equilibrium block assembly is arranged on the bottom of iron core.

4. rotary compressor according to claim 1 is characterized in that: described equilibrium block assembly is two groups of equilibrium block assemblies that are separately positioned on the iron core upper and lower.

5. according to the described rotary compressor of arbitrary claim among the claim 1-4, it is characterized in that: described track device is a guide rod, and it is outer and can slide along guide rod that the dynamic balancing piece is socketed on guide rod, describedly decides equilibrium block and iron core is affixed.

6. according to the described rotary compressor of arbitrary claim among the claim 1-4, it is characterized in that: described track device is a guide groove, and the dynamic balancing piece is located in the guide groove and can be slided along guide groove, and described to decide equilibrium block affixed by guide groove and iron core.

7. according to the described rotary compressor of arbitrary claim among the claim 1-4, it is characterized in that: described elastic coupling element is coil tension spring or rubber link.

8. according to the described rotary compressor of arbitrary claim among the claim 1-4, it is characterized in that: the surface of contact of described track device and dynamic balancing piece is level and smooth.

9. according to the described rotary compressor of arbitrary claim among the claim 1-4, it is characterized in that: described track device is an arc.

10. according to the described rotary compressor of arbitrary claim among the claim 1-4, it is characterized in that: describedly decide equilibrium block by riveted joint, solid or welding of spiral shell and iron core are fixed.

Images