CN206329491U - Scroll compressor having a discharge port - Google Patents

Abstract

The utility model relates to a scroll compressor. According to the utility model provides a scroll compressor, including main shaft, suit at the epaxial rotor of main shaft, around the stator that the rotor arranged and install the vortex subassembly on the top of main shaft, wherein, scroll compressor is still including setting up first balancing piece and the second balancing piece between the upper end of rotor and vortex subassembly, and first balancing piece is located second balancing piece top. The utility model discloses a vortex compressor does not have the problem that the balancing piece stirred oil down, can show the oil circulation rate that reduces the compressor.

Description

Scroll compressor

Technical field

The utility model is related to compressor, and in particular to scroll compressor.

Background technology

The content of this part provide only the background information related to the disclosure, and it may not constitute prior art.

Compressor is a kind of fluid machinery that low-pressure gas is promoted to gases at high pressure, is that the core in refrigeration system is set It is standby.Compressor can be divided into displacement type compressor and velocity profile compressor by its principle.Screw compressor is a kind of typical volume Formula compressor.In order to improve the overall performance of screw compressor, technical staff be directed to always to the oil recycle ratio of compressor and Power consumption is controlled, and is expected that by the factor of analyzing influence oil recycle ratio and power consumption to find the oil of reduction compressor The mode of cycling rate and power consumption, so as to improve the performance of compressor.

The method of various reduction oil recycle ratios and power consumption has been proposed in the prior art.The utility model wishes to carry Go out a kind of solution more optimized, can more effectively reduce oil recycle ratio and compressor power consumption, to improve the comprehensive of compressor Close performance.

Utility model content

A purpose of the present utility model is to provide a kind of scroll compressor, and it, which can be substantially reduced or even eliminate, stirs oil Phenomenon, so as to lower oil recycle ratio.

Another purpose of the present utility model is to provide a kind of scroll compressor, and it can significantly reduce the work(of compressor Consumption.

Another purpose of the present utility model is to provide a kind of scroll compressor, and it can mitigate when multi-connected machine works Oily imbalance problem.

One or more of above-mentioned purpose can realize that this screw compressor includes by following scroll compressors Main shaft, the rotor being sleeved on main shaft, the stator and the scroll component installed in the top of main shaft arranged around rotor, its In, scroll compressor also includes the first balance weight and the second balance weight being arranged between the upper end of rotor and scroll component, First balance weight is located above the second balance weight.

Using above-mentioned scroll compressor, due to moving to the top of rotor on lower balance weight, it is thus eliminated that lower balance The problem of block stirs oil, can significantly reduce the oil recycle ratio of compressor.Other further technique effects are below by reference to attached Figure is described in more detail.

Preferably, the first balance weight and the second balance weight are arranged to produce centrifugal force in opposite direction when rotated.

Preferably, balance weight is not arranged in the lower section of rotor.

Preferably, the second balance weight is attached to the upper end of rotor.

Preferably, the second balance weight set is filled to main shaft and is spaced apart with the upper end of rotor.

Preferably, the first balance weight set is filled to main shaft.

Preferably, the arranged beneath of scroll component has the thrust plate for supporting scroll component, and the first balance weight is arranged on Below thrust plate.

Preferably, the arranged beneath of thrust plate has main bearing seat, and the first balance weight is at least partially situated in main bearing seat.

Preferably, streamlined cage is neighboringly disposed with the upper end of rotor, the second balance weight is at least in part In streamlined cage.

Preferably, the second balance weight is made with brass, steel, magnesium or powdered metallurgical material.

Preferably, the first balance weight and the second balance weight are integral type or split-type structural.

Preferably, the second balance weight is to include the cyclic structure of counterweight part and installation portion.

Preferably, scroll compressor is frequency-changeable compressor.

Brief description of the drawings

By description referring to the drawings, the feature and advantage of one or several embodiments of the present utility model will become Obtain easier to understand, wherein：

Fig. 1 shows a kind of schematic diagram of the internal structure of existing screw compressor；

Fig. 2 shows the schematic diagram of the standard oil level in the screw compressor in Fig. 1；

Fig. 3 shows schematic internal view of the screw compressor in the case where stirring oil condition in Fig. 1, illustrated therein is oil sump and is stirred Dynamic state；

Fig. 4 shows the schematic diagram of the oil balance between two compressors in the state of multi-connected machine；

Fig. 5 shows the schematic diagram of the internal structure of the screw compressor according to embodiment of the present utility model；

Fig. 6 a and Fig. 6 b show the schematic diagram of the rotor of the screw compressor of Fig. 5 embodiments, and wherein Fig. 6 a are shown Side view, Fig. 6 b show stereogram；

Fig. 7 a and Fig. 7 b show the schematic diagram of the lower balance weight according to embodiment of the present utility model, and wherein Fig. 7 a show Stereogram seen from above is gone out, Fig. 7 b show the stereogram watched from below；

Fig. 8 shows the schematic diagram of the rotor of existing screw compressor；

Fig. 9 shows the oil recycle ratio contrast of the existing compressor shown in the screw compressor and Fig. 1 of Fig. 5 embodiments Figure；

Figure 10 shows the power consumption pair of the existing compressor shown in the screw compressor and Fig. 1 of Fig. 5 embodiments Than figure；And

Figure 11 a and Figure 11 b show the signal of the rotor of the screw compressor according to another embodiment of the utility model Figure, wherein Figure 11 a show side view, and Figure 11 b show stereogram.

Embodiment

To before being illustrated according to the compressor of the utility model embodiment, first with reference to Fig. 1 to Fig. 4 to one kind The problem of in terms of the operation principle and its oil recycle ratio and power consumption of existing screw compressor, illustrates.

Fig. 1 shows a kind of structural representation of screw compressor 100 '.This compressor 100 ' mainly includes：For constituting The stator 120 ' and rotor 130 ' of motor；Main shaft 140 ' for transmitting power；By quiet 111 ', dynamic vortex 112 ' and the cross of being vortexed The scroll component 110 ' that slip ring 113 ' is constituted；Thrust plate 101 ' and main bearing seat 102 ' for supporting scroll component 110 '；If Put upper balance weight 104 ' and lower balance weight 105 ' on main shaft 140 '；Air entry 106 ', air-breathing gear for refrigerant circulation Plate 109 ' and exhaust outlet 107 '；And it is arranged in the oil sump 150 ' and oil pump 108 ' of the bottom of compressor 100 '.

Operationally, refrigerant enters compressor 100 ' from air entry 106 ', and vortex is led into through air-breathing baffle plate 109 ' Component 110 ', is then realized by the relative motion of the quiet vortex 111 ' in scroll component 110 ' and dynamic vortex 112 ' to refrigeration The compression of agent, is then discharged compressed refrigerant by exhaust outlet 107 '.

After refrigerant enters compressor assembly by air entry 106 ', most refrigerant draws air-breathing baffle plate 109 ' Lead it is lower be directly entered the air entry of scroll component 110 ' upwards, another part then downwards after motor and bottom oil sump 150 ' again Flow up into the air entry of scroll component 110 '.

Carry out gas compression while, by oil pump 108 ' by lubricating oil from bottom oil sump 150 ' via compressor 100 ' Main shaft 140 ' in eccentric orfice 141 ' be transported to each bearing and scroll component 110 ', to be each portion in compressor 100 ' Part, which is provided, lubricates and takes away the heat produced in work.This parts of lubricating oil slowly can drop back into oil sump from the part lubricated In.In addition, the lubricating oil in bottom oil sump 150 ' can form oil due to the agitation of main shaft 140 ' in the top of bottom oil sump 150 ' Mist, the above mentioned refrigerant for flowing downwardly through oil sump can carry the refrigerant circulation system that the mist of oil stirred enters compressor 100 ' System.

Except the main shaft 140 ' of compressor 100 ' stirs oil, also there is balance weight and stir oil in the compressor 100 ' shown in Fig. 1 The problem of.In Fig. 1 compressor 100 ', scroll component 110 ' can produce unbalance dynamic in compression refrigerant, be set for this Upper balance weight 104 ' and lower balance weight 105 ' offset this unbalance dynamic.In the arrangement shown in figure 1, upper balance weight 104 ' The top of rotor 130 ' is arranged on, lower balance weight 105 ' is arranged on the lower section of rotor 130 '.

In some screw compressors (such as frequency-changeable compressor), lower balance weight 105 ' is close apart from bottom oil sump 150 ', Such as distance only 10mm, as shown in Figure 2.In the two lines shown in Fig. 2, the chain-dotted line of lower section represents the mark of oil sump 150 ' Quasi- oil level, the dotted line of top represents the level height of the lower bottom surface of balance weight 105 ', and the distance between two lines represent lower and balanced The distance between block 105 ' and bottom oil sump 150 '.In this case, balance weight 105 ' at present is rotated at a high speed in compressor 100 ' Oil sump 150 ' can be tempestuously stirred, a large amount of mist of oils is formd, can further increase oil recycle ratio.

The lubricating oil of refrigerant-cycle systems is brought into because stirring oily phenomenon can not only increase the oil circulation of compressor 100 ' Rate, also as the mist of oil into refrigerant-cycle systems can be attached in the pipeline of heat exchanger, so as to influence heat exchange efficiency.

Meanwhile, when multi-connected machine is applied, the oil balance between each compressor can also be influenceed by stirring oily phenomenon.Lower balance weight 105 ' stir oil and can cause the liquid fluctuating of oil sump 150 ', make housing rotation rise of the lubricating oil along compressor 100 ' and are formed and thrown Object plane.Fig. 3 show acutely stir oil in the case of, the liquid level state of the oil sump 150 ' in compressor 100 '.Chain-dotted line in Fig. 3 Still represent the standard oil level of oil sump 150 ', it can be seen that the liquid level for the oil sump 150 ' being stirred is into parabolic shape, and both sides are high Go out standard oil level.When multi-connected machine is applied, liquid level rise and fluctuation can cause the oil in oil sump 150 ' to flow into another compressor. The schematic diagram of oil balance when multi-connected machine is applied is shown in Fig. 4, compressor 100 ' is via oil balance tube 300 and another compressor 200 are connected, in the case of the pasta big ups and downs in compressor 100 ', and the lubricating oil in compressor 100 ' can be via oil balance Pipe 300 flows into the compressor 200 of opposite side.This causes the oil starvation of compressor 100 ' of side and the compressor 200 of opposite side lubricates It is oily excessive, so that it cannot be guaranteed that oil balance during on-line Application between each compressor, and influence the performance of compressor.From figure The oil level of the compressor 100 ' in 4 it can be clearly seen that left side is significantly lower than standard oil level and less than right side compressor 200 Oil level, and the oil level of right side compressor 200 then be higher than standard oil level.

Balance weight stirs oily problem and shows more prominent in frequency-changeable compressor.When frequency-changeable compressor with a high speed (such as When 7200rpm) running, lower balance weight 105 ' the meeting vigorous agitation oil sump 150 ' of rotation at a high speed forms substantial amounts of mist of oil, and system Cryogen flow velocity and flow are also greatly increased, and are easily carried mist of oil and are entered refrigerant-cycle systems, so as to cause larger oil circulation Rate.If one in two online compressors is frequency-changeable compressor and another is constant speed compressor, when frequency conversion compression During machine high-speed cruising, the liquid level of oil sump 150 ' under agitation can along compressor 100 ' housing rapidly rotational flow, part profit Lubricating oil can enter another constant speed compressor 200 by oil balance tube 300, while housing of the part agitation to compressor 100 ' On lubricating oil can be flowed down along housing, air-flow drive under pass through oil balance tube 300 enter side constant speed compressor 200.This Oily imbalance problem is more serious in the case of kind.

The inventors have discovered that lower balance weight 105 ' and main shaft 140 ' stir oily problem and can significantly increase oil recycle ratio, shadow The refrigeration performance of compressor is rung, and also results in the lubricants capacity deficiency needed for heat exchange, so as to influence dissipating for compressor assembly Hot property.The direct mode for solving this problem is exactly that oil is stirred in reduction.

The scheme that oil is stirred in some reductions is proposed in existing design.One scheme is the thickness for reducing lower balance weight 105 ', To increase the spacing between the liquid level of bottom oil sump 150 ', oil is stirred so as to reduce.Based on this scheme, it is desirable to by upper balance weight 104 ' widen as far as possible with the distance between lower balance weight 105 ', to increase dynamic balancing torque, so that the thickness of lower balance weight 105 ' Degree is possible to thinned.This scheme is limited to the available inner space (longitudinal space) of compressor, because the structure of compressor is managed Being to maintain for thinking is as compact as possible, thus the spacing between upper balance weight 104 ' and lower balance weight 105 ' can only limited extent drawing Greatly.

Another scheme is to set a smooth streamlined protective cover in the outside of lower balance weight 105 ', and oil is stirred to alleviate Problem.This scheme has a certain effect, but the problem of fundamentally can not solve to stir oil, and be unprofitable to reduce power consumption.

To compressor when stirring oily problem and studying, the present inventors have additionally discovered that, lower balance weight 105 ' and main shaft 140 ' stir oil and can dramatically increase the power consumption of compressor, and do not pay special attention to and stir when studying before this power consumption of compressor Power consumption increase caused by oily problem.

For above mentioned problem present in existing compressor 100 ', and based on to influence compressor 100 ' oil recycle ratio and The discovery of the factor of power consumption, it is new according to this practicality present inventors have proposed solution that is a kind of simple and being easily achieved The design of type, the structure without significantly changing existing compressor 100 ' passes through the arrangement of the lower balance weight of adjustment, so that it may Oil recycle ratio is significantly reduced with realization and the purpose of power consumption is reduced.

The composition of scroll compressor according to embodiment of the present utility model is described referring to Fig. 5 to Figure 11 b And relative to the improvement of prior art.It should be noted that hereafter mainly describing in detail according to the utility model embodiment Scroll compressor construction unlike the prior art, similar part will be briefly described or omit the description.Also, it is right below The description of preferred embodiment is only exemplary, and is definitely not to the utility model and its application or the limitation of usage.

With reference first to basic structures of the Fig. 5 to the scroll compressor 100 according to an embodiment of the present utility model Illustrate.Compressor 100 mainly includes：For sucking air entry 106 and exhaust outlet 107 with discharging refrigerant；For pressing The scroll component 110 of contraction cryogen；Thrust plate 101 and main bearing seat 102 for supporting scroll component 110；For constituting horse The stator 120 and rotor 130 reached；And for transmitting the main shaft 140 of power.

Scroll component 110 can include：Quiet the be vortexed 111, dynamic vortex 112 with the 111 opposed installations of quiet vortex and setting In the quiet cross slip-ring 113 being vortexed between 111 and dynamic vortex 112.Thrust plate 101 and main bearing seat 102 are fixed by screws in Together.Stator 120 is clamped on rotor 130 by clip 108.

Being particular in that for present embodiment, is provided with two solely between the upper end of rotor 130 and scroll component 110 Vertical balance weight, i.e.,：Upper balance weight (the first balance weight) 104 and lower balance weight (the second balance weight) 105.The cloth of this embodiment Put with being that will be originally arranged at the lower balance of the lower section (as shown in fig. 1) of rotor 130 in place of the main difference of prior art Block has been arranged in the top of rotor 130.

The change of this arrangement is simple, but very notable for the effect of compressor performance optimization, even It is surprising.

In the above-described embodiment, lower balance weight 105 is arranged in the top of rotor 130, the oil away from the bottom of compressor 100 Pond 109, therefore lower balance weight 105 itself will not stir oil, it is to avoid asked present in prior art caused by balance weight stirs oil Topic.It can be produced the advantage that according to this arrangement of the utility model embodiment：

First, because lower balance weight 105 no longer stirs oil, therefore the mist of oil of the top of oil sump 109 is substantially reduced so that refrigerant It is only capable of the seldom lubricating oil of carrying and enters refrigeration system, so as to reduces oil recycle ratio, it is to avoid to compressor cooling performance not Profit influence, and the power consumption of compressor 100 can be significantly reduced.Lower balance weight 105 is illustrated below in reference to experimental data The design moved up is to the oil recycle ratio of compressor and the influence of power consumption.

Second, because lower balance weight 105 is moved up, oil sump 109 increases apart from the distance of upper part, simultaneously because eliminating The lower end of the rotor 130 of lower balance weight 105 is substantially planar, therefore, it is possible to reduce " fan " that is produced when rotor 130 rotates Effect (because the lower balance weight of the lower end of rotor 130 or arranged beneath is produced to the agitation of air), so as to reduce swirling eddy Agitation to oil sump 109, further reduces the mist of oil of the top of oil sump 109.

3rd, in the case of on-line Application, because lower balance weight 105 will not stir oil sump 109, so the oil sump of bottom 109 liquid level does not have excessive fluctuation steadily, and lubricating oil " will not be thrown and risen " compression for entering opposite side along oil balance tube road Online oil balance is destroyed in machine.

4th, after lower balance weight 105 is moved up, when being inverted compressor 100 to install bottom bearing, due to lower balance weight 105 barrier effect, rotor 130 and main shaft 140 will not excessively be moved vertically because of Action of Gravity Field, and main shaft 140 does not have disengaging The risk of bottom mounting apertures.So, bottom bearing installation and compressor 100 is upright when, main shaft 140 can be more easily Alignment playback, and be avoided that during playback because it is excessive axial movement damage bottom bearing.This has the technical effect that unexpected The beneficial effect in installation.

Below, with continued reference to arrangement and its phase of the accompanying drawing to upper balance weight 104 and lower balance weight 105 in above-mentioned embodiment Technique effect is answered to illustrate.

Fig. 6 a and Fig. 6 b show turning in the screw compressor 100 of Fig. 5 embodiments with side view and stereogram respectively The schematic diagram of son 130.As shown in FIG., lower balance weight 105 is directly installed on the upper end of rotor 130.In this embodiment, under Balance weight 105 is fixed to the upper surface of rotor 130 by screw 131.In addition, any other suitable mounting means is all feasible 's.Such as, multiple boss can be set in the upper end of rotor 130, multiple corresponding mounting holes is formed in lower balance weight 105, Lower balance weight 105 is attached to rotor 130 by the way that mounting hole is set on boss.Or, lower balance weight 105 can be welded Connect or be bonded in the upper end of rotor 130.

Fig. 7 a and Fig. 7 b show the schematic diagram pacified suitable for screw and hold balance weight 105.As shown in FIG., lower balance weight 105 as the part 105a and installation portion 105b of counterweight main body by constituting.Three screw hole 105c are provided with installation portion 105b. Lower balance weight 105 is attached to main shaft 140 by center through hole 105d.

In order to intuitively be contrasted with the rotor 130 shown in Fig. 6 a and 6b, Fig. 8 shows the existing scroll compression in Fig. 1 The schematic diagram of rotor 130 ' in contracting machine 100 '.In the structure shown in Fig. 8, lower balance weight 105 ' is arranged under rotor 130 ' End, it is opposite with the installation according to embodiment of the present utility model shown in Fig. 6 a.

Below, based on both the different arrangement sides used in above-mentioned embodiment and existing design of the present utility model Formula, the performance improvement of the compressor 100 according to principle design of the present utility model is exemplarily illustrated with reference to chart.

With reference first to Fig. 9, the existing compressor shown in compressor 100 and Fig. 1 in Fig. 5 embodiments illustrated therein is The comparison diagram of 100 ' oil recycle ratio.Fig. 9 longitudinal axis represents oil recycle ratio, and transverse axis represents ARI (The Air- Conditioning＆Refrigeration Institute, U.S.'s air-conditioning refrigeration association) rotating speed under standard condition.

It can be seen in figure 9 that from the about 3500RPM slow-speed of revolution to about 6700RPM high rotating speed, according to the utility model The oil recycle ratio of the compressor 100 of embodiment increases to 3.4% from 1.4%, and the oil recycle ratio of existing compressor 100 ' is then 8.2% is increased to from 1.3%, it is clear that gentler with the increase of rotating speed according to the oil recycle ratio of compressor 100 of the present utility model, And requirement of the satisfaction to the oil recycle ratio of positive displacement compressor 3%~4%.Especially, when compressor rotary speed reaches 6000RPM During~6700RPM, compared with the compressor 100 ' shown in Fig. 1, the compression according to the utility model embodiment shown in Fig. 5 The oil recycle ratio of machine 100 is lower than the oil recycle ratio of existing compressor 100 ' by about 3%~5%.Such oil recycle ratio reduces right and wrong Often it is difficult, the design that lower balance weight is located at below rotor can not possibly reach so low oil recycle ratio.

Figure 10 shows the power of the existing compressor 100 ' shown in the screw compressor 100 and Fig. 1 of Fig. 5 embodiments Consume comparison diagram.Figure 10 longitudinal axis represents the compressor 100 according to the utility model embodiment relative to existing compressor 100 ' power drop ratio, transverse axis represents the rotating speed under ARI standard conditions.

From figure 10, it is seen that being consistently lower than according to the power consumption of the compressor 100 of the utility model embodiment existing The power consumption of compressor 100 ', declines with 2.5%~3.8% power consumption.Also, as shown in FIG., as compressor turns Difference between the increase of speed, power consumption is more and more significant, when reaching about 6700RPM rotating speed, and power consumption, which declines, to be reached about 3.8%.Beneficial effect in terms of this power consumption is surprising.Under normal circumstances, if using the design of other reducing power consumptions, It can reach that 1% power consumption declines all to be difficult very much, and with the increase of rotating speed, power consumption, which declines, can ease up or even stagnate.And The technique effect beneficial this embodiment provides exception of the present utility model, not only all keeps very high in whole working cycles Power consumption decline, and to increase this trend more notable with rotating speed.The power consumption that lower balance weight 105 is moved up and brought significantly drops Low effect is surprising, the lifting of beneficial effect in terms of this reducing power consumption for the overall performance of scroll compressor It is extremely important.

Illustrate in an illustrative manner above according to scroll compressor of the present utility model substantially improve mode and The beneficial effect of realization.Below, to the relative arrangement of upper balance weight 104 in the compressor according to the utility model embodiment with And other embodiments possibles based on design of the present utility model are illustrated.

According in embodiment of the present utility model, the arrangement of upper balance weight 104 is compared to existing arrangement side Formula does not have significant changes.In the compressor 100 shown in Fig. 5, the arranged beneath of scroll component 110 has for providing stopping for support Push pedal 101, upper balance weight 104 is just arranged on the lower section of thrust plate 101.Also, upper balance weight 104 similar with existing mounting means It is set on main shaft 140.

Preferably, main bearing seat 102 is there also is provided in the lower section of thrust plate 101, upper balance weight 104 can be set herein Inside main bearing seat 102.In the example shown in figure 5, upper balance weight 104 is fully located inside main bearing seat 102；In other realities Apply in mode, upper balance weight 104 can be positioned partially inside main bearing seat 102.Because main bearing seat 102 is internally formed The airflow space substantially closed, the air velocity in the operating room of compressor 100, this space can be significantly lower than the gas of outside Flow velocity degree, the air drag for contributing to the windward side for reducing upper balance weight 104 to bear with this arrangement.

For lower balance weight 105, except the design being described above, in an alternative embodiment, lower balance weight 105 Rotor 130 is not directly mounted to, and is mounted on main shaft 140 and is spaced apart with the upper end of rotor 130.Figure 11 a and figure 11b shows the schematic diagram of the rotor according to another embodiment of the present utility model with side view and stereogram respectively.Herein In embodiment, similar part is represented with the reference number similar to Fig. 6 a and Fig. 6 b, but hundreds word increase by 1.Figure The structure of the rotor 130 shown in the rotor 230 and Fig. 6 a and Fig. 6 b that are shown in 11a and Figure 11 b is essentially identical, and difference exists In the installation site of lower balance weight 205.As shown in FIG., lower balance weight 205 be not be attached directly to rotor 230 body it is upper End face, but with the upper surface of rotor body is spaced apart installs.In this embodiment, lower balance weight 205 can be with The mode of interference fit is fixed to main shaft 240, or is fixed to main shaft 240 in the way of bonding or weld.It is additionally, since rotor 230 tops have sufficient space, therefore lower balance weight 205 can need adjustment with the interval of the upper end of rotor 230 according to design.

Preferably, in the embodiment illustrated in figure 5, a streamline can neighboringly be arranged in the upper end of rotor 130 Type cage 103, such as cylindric cage 103, can arrange lower balance weight 105 in this cage 103.In Fig. 5 Embodiment in, lower balance weight 105 is positioned partially in cage 103；In other embodiments, cage can be made 103 substantially completely surround lower balance weight 105.Arrange that streamlined cage 103 can be prevented from the main shaft 140 of high speed rotation The oil droplet thrown away outwards splashes, and can reduce the air drag that the windward side of lower balance weight 105 is born.

Substantially, according to principle of the present utility model, as long as upper balance weight 104 and lower balance weight 105 disclosure satisfy that dynamic put down The requirement of weighing apparatus, then spacing, specific arrangement and weight therebetween can need to adjust according to design.

For lower balance weight 105, moved in the lower section from rotor 130 behind top, its weight will be accordingly increased, it is thick Degree may also be thickened.Weight increase is dynamically balanced to require (because move up the rear arm of force shorten) to meet.Thickness increase is then Since there are enough installing spaces, therefore the requirement to the thickness of lower balance weight 105 is relaxed.

The specific thickness of lower balance weight 105 and the quality, the quality of upper balance weight 104, upper balance weight 104 of dynamic vortex 112 The making material of spacing and lower balance weight 105 between lower balance weight 105 is relevant.Such as, lower balance weight 105 can use Huang Copper, steel, magnesium or powdered metallurgical material are made.If it is desired to the thickness of lower balance weight 105 is smaller, can be using the larger material of density Expect lower balance weight 105 is made.

According to the operation principle of scroll compressor, in order to meet the requirement for dynamic balance of scroll component 100, upper balance weight 104 and lower balance weight 105 to be arranged to produce centrifugal force in opposite direction when rotated.In one according to the utility model principle In a little embodiments, for installing space in terms of consideration, upper balance weight 104 can be split as to two single balance weights, In this case, lower balance weight 105 will be arranged to two independent balance weights of the centrifugal force and top for making it be produced when rotating Centrifugal force resultant direction it is opposite.This embodiment still has good effect in terms of reduction oil recycle ratio and power consumption Really.

And then, in other embodiments according to the utility model principle, it may be considered that by the one of lower balance weight 105 Fraction balance weight remains in the lower section of rotor 130, and the balance weight that this part is retained in lower section can be by thickness Very thin balance weight is provided.Because the balance for being retained in lower section is very thin, this embodiment also substantially can Enough realize above-mentioned technique effect of the present utility model.It is, of course, preferable to mode be still by lower balance weight 105 be fully disposed in turn The top of son 130, this mode is more facilitated, and better.

It is exactly the exemplary illustration to the scroll compressor according to principle of the present utility model above.It is new according to this practicality The construction of the above-mentioned embodiment of type is particularly useful for frequency-changeable compressor.Compared to invariable frequency compressor, the rotating speed of frequency-changeable compressor It can be adjusted to very high, the flow velocity and flow of refrigerant all increase therewith under high rotating speed, and if there is oil is stirred, then stirring oily situation can be very Seriously, the amount for the gas mixture being circulated in above the oil sump of bottom can be very big, then oil recycle ratio is very high, power consumption increase.According to The above-mentioned embodiment of the utility model can solve these problems well.

Although various embodiments of the present utility model have been described in detail herein, it should be appreciated that the utility model is not The embodiment be described in detail and shown here is confined to, in the case of without departing from spirit and scope of the present utility model It may be effected by one skilled in the art other modifications and variant.All these modifications and variant both fall within of the present utility model In the range of.Moreover, all components described here can be replaced by component equivalent in other technologies.

Claims (13)

1. a kind of scroll compressor (100), including main shaft (140), be sleeved on the main shaft (140) rotor (130), enclose The stator (120) and the scroll component (110) installed in the top of the main shaft (140) arranged around the rotor (130), Characterized in that,

The scroll compressor (100) also include being arranged on the upper end of the rotor (130) and the scroll component (110) it Between the first balance weight (104) and the second balance weight (105), first balance weight (104) be located at second balance weight (105) top.

2. scroll compressor (100) according to claim 1, wherein, first balance weight (104) and described second Balance weight (105) is arranged to produce centrifugal force in opposite direction when rotated.

3. scroll compressor (100) according to claim 1, wherein, there is no cloth horizontalization below the rotor (130) Weigh block.

4. scroll compressor (100) according to claim 1, wherein, second balance weight (105) is attached to described The upper end of rotor (130).

5. scroll compressor (100) according to claim 1, wherein, the second balance weight (105) set is filled to described Main shaft (140) and it is spaced apart with the upper end of the rotor (130).

6. scroll compressor (100) according to claim 1, wherein, the first balance weight (104) set is filled to described Main shaft (140).

7. scroll compressor (100) according to claim 6, wherein, the arranged beneath of the scroll component (110) has Thrust plate (101) for supporting the scroll component, first balance weight (104) is arranged under the thrust plate (101) Side.

8. scroll compressor (100) according to claim 7, wherein, the arranged beneath of the thrust plate (101) has master Bearing block (102), first balance weight (104) is at least partially situated in the main bearing seat (102).

9. scroll compressor (100) according to any one of claim 1 to 8, wherein, in the rotor (130) The upper end is neighboringly disposed with streamlined cage (103), and second balance weight (105) is at least partially situated at institute State in streamlined cage (103).

10. scroll compressor (100) according to any one of claim 1 to 8, wherein, second balance weight (105) it is made with brass, steel, magnesium or powdered metallurgical material.

11. scroll compressor (100) according to any one of claim 1 to 8, wherein, first balance weight (104) and second balance weight (105) be integral type or split-type structural.

12. scroll compressor (100) according to any one of claim 1 to 8, wherein, second balance weight (105) it is to include the cyclic structure of counterweight part (105a) and installation portion (105b).

13. scroll compressor (100) according to any one of claim 1 to 8, wherein, the scroll compressor (100) it is frequency-changeable compressor.