CN106555755B - Balancing weight and rotary machine comprising same - Google Patents
Balancing weight and rotary machine comprising same Download PDFInfo
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- CN106555755B CN106555755B CN201510640769.4A CN201510640769A CN106555755B CN 106555755 B CN106555755 B CN 106555755B CN 201510640769 A CN201510640769 A CN 201510640769A CN 106555755 B CN106555755 B CN 106555755B
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Abstract
The invention relates to a balance weight and a rotary machine comprising the same. According to an aspect of the invention, a weight (170, 170B, 170C, 170D) is provided, comprising a weight portion (174, 174C) comprising a leading end portion (175, 175C) having a leading circumferential extremity (1753, 1753C) and a trailing end portion (177, 177C) having a trailing circumferential extremity (1773, 1773C) with respect to a direction of Rotation (RD) of the weight portion. At least one of the leading end portion and the trailing end portion is configured to taper towards the respective circumferential tip. According to the present invention, power consumption of the rotating structure including the balance weight can be reduced.
Description
Technical field
The present invention relates to balance weight and including the rotary machine of the balance weight, more particularly, to can disappear in power
Consumption aspect makes improved balance weight.
Background technique
It is including that (such as compressor is special for the rotary machine of moving component (such as compression mechanism, motor, rotary shaft etc.)
It is screw compressor) in, vibration will increase due to the movement of moving component (such as rotation) imbalance in machine operation, make an uproar
Sound etc..In some cases, the movement imbalance of moving component is the component installed by moving component itself and/or thereon
Mismachining tolerance and caused by causing mass center uneven.In other situations, the movement imbalance of moving component is due to spy
Caused by eccentric structure is set to realize specific function in the component that meaning ground is installed in moving component itself and/or thereon
(for example, cam pin is arranged at drive shaft to make dynamic vortex relative to determine vortex using eccentric center principle in screw compressor
Carry out circular translational).
Uneven for this movement, setting is capable of providing the balance weight of reversed centrifugal force with flat usually on moving component
Movement caused by weighing apparatus is uneven to reduce vibration and noise.
Balance weight is moved with the movement of moving component.The ring locating for such as moving component high speed rotation, balance weight
There are environment locating for gas stream, and/or balance weight in border there are in the application scenarios of liquid flow (such as oil stream), and balance weight is deposited
Increase to consume so as to cause system dynamic in the resistance of motion that will lead to moving component and increase.In addition, if balance weight is due to shape
The reasons such as shape and cause intensity insufficient, then the balance weight in high-speed motion is readily able to that fracture (such as fatigue fracture) occurs.
Here, it is noted that technology contents provided in this part are intended to facilitate those skilled in the art couple
Understanding of the invention, and not necessarily constitute the prior art.
Summary of the invention
There is provided total summary of the invention in this part, rather than complete scope of the present invention or all features of the present invention is complete
Face discloses.
It is an object of the present invention to provide the balances that one kind can reduce the terminus area of front end and/or tail end
Block.
It can make fluid smoothly it is a further object of the present invention to provide one kind and successfully flowing is by the flat of balance weight
Weigh block.
It is a further object of the present invention to provide one kind, and balance weight can be made not stir or excessively stir fluid to realize
The balance weight of controlled and optimization fluid flow path.
It can make the point of flow separation rearward displacement after balance weight it is a further object of the present invention to provide one kind and make
The balance weight that the velocity wake region at balance weight rear reduces or negative pressure reduces.
It is a further object of the present invention to provide one kind, and balance weight can be made suffered pressure drag and then to meet during exercise
The balance weight that face resistance reduces.
It is a further object of the present invention to provide the balances that one kind can reduce the power consumption of rotational structure and then compressor
Block.
It is a further object of the present invention to provide a kind of stress that can be avoided to concentrate to increase the balance of the intensity of balance weight
Block.
It is of the invention other to be designed to provide a kind of rotary machine including above-mentioned balance weight.
One or more of to achieve the goals above, according to an aspect of the present invention, provide a kind of balance weight, institute
Stating balance weight includes counterweight part, and the counterweight part includes front end and the tail end of the direction of rotation about the counterweight part, institute
Front end is stated with preceding circumferential ends, the tail end has tail circumferential ends.In the front end and the tail end extremely
Few one is configured to tapered towards corresponding circumferential ends.
One or more of to achieve the goals above, according to another aspect of the present invention, provide a kind of rotary machine
Tool.The rotary machine includes balance weight as described above.
In balance weight according to the present invention, front end and tail end itself and then entirely balance weight, which are formed, has streamlined
The fairing of shape (especially front end and tail end are in tapered fairing).Therefore, terminus area (the windward side face of front end
Product) and the terminus area of tail end be reduced, and make fluid around balance weight smoothly and successfully flowing process
Balance weight and balance weight will not stir or excessively stir fluid to realize controlled and optimization fluid flow path.In addition,
Also make the point of flow separation rearward displacement after balance weight and makes that the velocity wake region at balance weight rear reduces or negative pressure subtracts
It is small.As a result, reduce not only the pressure at the front end (windward side) of balance weight but also makes the tail at the tail end of balance weight
It flows resistance caused by (turbulent flow) to reduce, also that is, making balance weight suffered pressure drag and then head resistance during exercise
(because fluid there are due to cause) reduce.In this way, there are moving fluid stream and/or balances for the environment especially locating for balance weight
Moving component attached by block (such as rotor) need to carry out high-speed motion (such as 3600 revs/min or more) compressor (such as
The variable speed compressor of high-speed motion) in, the moving component (i.e. entire rotational structure) as attached by balance weight and then balance weight
The suffered resistance of motion (fluid resistance) reduces, therefore the power consumption of rotational structure and then compressor is reduced.It is another
Aspect, the transition portion due to being provided with sectional dimension smooth variation in balance weight may be not present or less exist section ruler
Very little part jumpy, therefore can be avoided stress and concentrate to increase the intensity (fatigue strength) of balance weight.Another side
Face, in the case that the environment locating for such as balance weight has lubrication oil stream, since fluid flow path controls with being optimised
And management, therefore the degree that lubricating oil is balanced block agitation and smashes reduces, so as to avoid the occurrence of excessive lubricating oil by work
Make the case where fluid carries and causes compressor oil starvation.
Detailed description of the invention
By description referring to the drawings, the feature and advantage of one or more embodiments of the invention will become more
Add and is readily appreciated that, in the accompanying drawings:
Figure 1A and Figure 1B is the perspective view for showing the balance weight according to the relevant technologies；
Fig. 2 is the sectional side elevation for showing the screw compressor for applying balance weight according to the present invention；
Fig. 3 A and Fig. 3 B are respectively the perspective view and plan view for showing the balance weight of first embodiment according to the present invention；
Fig. 4 is to show the balance weight of first embodiment according to the present invention to install to the perspective view of the state of rotor；
Fig. 5 A is the perspective view for showing the balance weight of second embodiment according to the present invention；
Fig. 5 B and Fig. 5 C are that the front end of the balance weight of second embodiment and tail end according to the present invention is shown respectively
Side view；
Fig. 6 is to show the balance weight of second embodiment according to the present invention to install to the perspective view of the state of rotor；
Fig. 7 A is the perspective view for showing the formula balance weight symmetrical above and below of third embodiment according to the present invention；
Fig. 7 B is the perspective view for showing the non-formula balance weight symmetrical above and below of third embodiment according to the present invention；
Fig. 8 is to show the balance weight of third embodiment according to the present invention to install to the perspective view of the state of drive shaft；
Fig. 9 is the perspective view for showing the variation example of the balance weight of first embodiment according to the present invention；
Figure 10 is the perspective view for showing the variation example of the balance weight of second embodiment according to the present invention；
Figure 11 A and Figure 11 B are the perspective view that the variation example of the balance weight of third embodiment according to the present invention is shown respectively
And plan view；And
Figure 12 is the perspective view for showing the variation example of the counterweight part of first embodiment according to the present invention.
Specific embodiment
With reference to the accompanying drawings, by illustrative embodiments, the present invention will be described in detail.To it is of the invention it is following in detail
Thin description is definitely not to the present invention and its application or the limitation of purposes merely for the sake of illustration purpose.
Firstly, the screw compressor for summarily describing to apply balance weight according to the present invention referring to Fig. 2 (is used as according to this
The rotary machine of invention) structure (Fig. 2 is the vertical profile for showing the screw compressor for applying balance weight according to the present invention
Figure).
As shown in Fig. 2, screw compressor 100 may include shell 110.Inner space can be defined in shell 110
S.It, can there are stationary fluid or moving fluid stream (such as the gas streams that are formed by working fluid and by moistening in internal space S
The liquid flow that lubricating oil is formed).
Screw compressor 100 can also include driving mechanism 130.Driving mechanism 130 may include electric motor 132 and drive
Moving axis 134 (corresponds to rotary part).Electric motor 132 may include stator 137 and rotor 138 (corresponding to rotary part).
Stator 137 may be fixedly attached to the inner peripheral wall of the enclosure body 110a of shell 110, and rotor 138 can fixedly cover
Integrally to be rotated with drive shaft 134 in drive shaft 134.Cam pin can be set at the top end part of drive shaft 134
139。
Screw compressor 100 can also include main bearing seat 180.Main bearing seat 180 may be fixedly attached to shell 100
Enclosure body 110a inner peripheral wall.Main bearing seat 180 be suitable for via the base bearing 182 being arranged in main bearing seat 180 and
Support a part of drive shaft 134.
Screw compressor 100 can also include the compression mechanism CM suitable for compression work fluid (such as refrigerant).Compression
Mechanism CM may include dynamic vortex component 150 and determine vortex component 160.
Dynamic vortex component 150 may include: substrate 152；The helical form upwardly extended from the upper surface of substrate 152 moves scrollwork
154；And the hub 156 extended downwardly from the lower surface of substrate 152.Dynamic vortex component 150 can be arranged in main bearing seat
180, and be axially supported to by main bearing seat 180 and be able to carry out moving.Cam pin 139 can be drivingly coupled to (insertion
To) hub 156.
Determine vortex component 160 may include: substrate 162；The helical form extended downwardly from the lower surface of substrate 162 determines scrollwork
164。
Determine scrollwork 164 to be suitable for engaging with dynamic scrollwork 154, so that a series of working fluid for limiting such as crescent accommodates
Room.
When screw compressor 100 operates, electric motor 132 is powered and revolves rotor 138 integrally with drive shaft 134
Turn.At this moment, the cam pin 139 such as with drive shaft 134 being integrally formed also rotates, thus for example via being placed in cam pin 139
Unloading bushing (not indicating) between hub 156 and/or driving bearing (not indicating) and drive hub 156, thus make whirlpool
It revolves component 150 and carries out translation rotation i.e. moving (also relative to determine vortex component 160 by such as cross slip-ring (not indicating)
That is, the axis of dynamic vortex component 150 revolves relative to the axis of determine vortex component 160, but dynamic vortex component 150 itself is not
It rotates about the axis thereof).As a result, from determining scrollwork 164 and each accommodating chamber that dynamic scrollwork 154 limits is from radial outside to radially inner side
Never closed suction chamber, which becomes closed discharge chambe again, in mobile process becomes central high pressure room (having maximum pressure), and
And volume is gradually from large to small.In this way, the pressure in accommodating chamber also gradually rises, so that working fluid is by compression and finally from fixed
Outlet (not indicating) at vortex substrate 162 is expelled to higher-pressure region HR (a part of inner space S) and then matches via discharge
Part 191 is expelled to outside compressor.
Screw compressor 100 can also include balance weight 170 (balance weight 170 of first embodiment according to the present invention).
As shown in Fig. 2, balance weight 170 may include being attached to the upper balance weight 170 of the upper end 138a of rotor 138 and being attached to rotor
The lower balance weight 170 of 138 lower end 138b.Balance weight 170 can provide reversed centrifugal force to balance for example by dynamic vortex component
150 in rotary course generated centrifugal force (positive centrifugal force), thus make entire rotational structure realize dynamic balancing to subtract
Small vibration and noise.
Balance weight 170 (Fig. 3 A and the figure of first embodiment according to the present invention are described referring to Fig. 3 A, Fig. 3 B and Fig. 4
3B is respectively the perspective view and plan view for showing the balance weight of first embodiment according to the present invention, and Fig. 4 is to show according to this
The balance weight of invention first embodiment is installed to the perspective view of the state of rotor).
Since the structure of upper balance weight 170 and lower balance weight 170 is essentially identical, for brevity, hereinafter will
Mainly upper balance weight 170 is described.
As shown in Figure 3A and Figure 3B, upper balance weight 170 may include attachment 172 and counterweight part 174.
Attachment 172 can be in general toroidal (in other examples or being in part-toroidal) and be adapted for attachment to
Thus upper balance weight 170 is securely attached to rotor 138 by the upper end 138a of rotor 138.Attachment 172 may include suitable for attached
It is connected to the surfaces for attachment of rotor 138 and the surface (also referred to as counterweight surface) 173 opposite with surfaces for attachment away from rotor 138.
In some instances, upper balance weight 170 can be set the fastener hole 179 of such as threaded hole by for example by screw threads for fastening in a manner of
Upper balance weight 170 is securely attached to rotor 138.In other examples, other suitable fixed means for attachment can be used.
Counterweight part 174 can axially upwardly extend from counterweight surface 137 and be formed as part-toroidal.In showing for diagram
In example, counterweight part 174 extends substantially 180 degree in circumferential direction.However, it is possible to conceive other suitable weeks of counterweight part 174
To expanded range.
Counterweight part 174 may include the direction of rotation RD (direction of rotation corresponding to rotor 138) about upper balance weight 170
Front end 175 and tail end 177.
According to first embodiment, the shape of counterweight part 174 is optimized.Particularly, in counterweight part 174, front end
Portion 175 and tail end 177 can be configured to make with the tapered shape towards respective end (circumferential ends) tapered (or gathering)
Front end 175 and tail end 177 are obtained in substantially tapered.
Referring specifically to Fig. 3 A and Fig. 3 B, front end 175 may include radially inner side portion 1751, radially outer side portions 1752, (week
To) end 1753 and axial end surface 1754.It radially inner side portion 1751 can be from the radially inner side portion benchmark circular arc of counterweight part 174
Line IA (also that is, imaginary extended line of the radially inner side portion circular arc of the middle part 176 of counterweight part 174) towards end 1753 radially
Outwardly away from.Also that is, radially inner side portion 1751 can tilt (in other words towards radial outside radially outward towards end 1753
It collapses in portion 1752).It is pointed out here that this surface angled manner in radially inner side portion 1751 is are as follows: radial and circumferential
It tilts still axial not inclined surface angled manner and is hereinafter properly termed as " first surface angled manner ".Diameter is outside
Side 1752 can extend along the radially outer side portions benchmark circular arc line OA of counterweight part 174.End 1753 can be done at rounded corner
Reason is to smoothly be connected in arcuation and with radially inner side portion 1751 and radially outer side portions 1752.
As a result, according to first embodiment, the balance weight in (axial direction of compressor 100) observation when in axial direction
When 170 (referring to Fig. 3 A and Fig. 3 B), front end 175, which is formed by end angle [alpha], can be greater than 0 degree and less than 90 for acute angle
Degree.In some instances, end angle [alpha] can advantageously be 7.5 degree to 70 degree, more preferably 15 degree to 50 degree and into
One step is more preferably 30 degree (or substantially 30 degree).
The configuration of tail end 177 can be similar to the configuration of front end 175.Tail end 177 may include radially inner side portion
1771, radially outer side portions 1772, (circumferential direction) end 1773 and axial end surface 1774, and end angle beta is formed by (along axis
When being observed to direction) 0 degree can be greater than and less than 90 degree for acute angle.In some instances, end angle beta can advantageously be
7.5 degree to 70 degree, more preferably 15 degree to 50 degree and even more preferably be 30 degree (or substantially 30 spend).
In some instances, end angle [alpha] can be equal to end angle beta.In other examples, end angle [alpha] can not
Equal to end angle beta.
In this way, due to the front end 175 in upper balance weight 170 and tail end 177 is in tapered shape and their end
1753,1773 round corner treatment is done, therefore entirely the upper formation of balance weight 170 has in turn for front end 175 and tail end 177 itself
The fairing of streamline shape (especially front end 175 and tail end 177 are in tapered fairing).
Compared with the balance weight for example as shown in FIG. 1A and 1B according to the relevant technologies, according to first embodiment flat
Weighing apparatus block 170 (upper balance weight 170 and lower balance weight 170) can at least bring advantageous effects as described below.
Figure 1A and Figure 1B is the perspective view for showing the balance weight according to the relevant technologies.
It is used to be attached in the balance weight 170' of rotor according to the relevant technologies shown by Figure 1A, the edge counterweight part 174'
Be arranged on the axial surface of attachment 172' in a part of the periphery of the attachment 172' of circular ring shape, and counterweight part
The front end 175' and tail end 177' of 174' be not tapered to not in substantially tapered towards respective end.On the contrary, preceding
The end of end 175' and the end of tail end 177' are in roughly planar, and counterweight part 174' is in the end of front end 175'
It is not connected smoothly with the end of tail end 177' with attachment 172' but Formation cross-section size is sharply therebetween
The stage portion (in particular, stage portion is formed on entire radial extension) of variation.
It is used to be attached in the balance weight 170 " of drive shaft according to the relevant technologies shown by Figure 1B, counterweight part 174 "
Along the fan-shaped edge in generally fan-shaped attachment 172 ", the radial outside in attachment 172 ", and counterweight part 174 " are set
Front end 175 " and tail end 177 " it is not tapered in substantially tapered towards respective end.On the contrary, front end
175 " end and the end of tail end 177 " are in roughly planar, and end and tail of the counterweight part 174 " in front end 175 "
The end of end 177 " is not connected smoothly with attachment 172 " but Formation cross-section size change dramatically therebetween
Stage portion (particularly, stage portion is formed on entire axial range).
In contrast, in balance weight 170 (upper balance weight 170 and lower balance weight) according to first embodiment, front end
Portion 175 and tail end 177 itself and then the entire formation of balance weight 170 have fairing (the especially front end 175 of streamline shape
It is in tapered fairing with tail end 177).Therefore, the terminus area (windward area) of front end 175 and tail end 177
Terminus area is reduced, and make fluid around balance weight 170 smoothly and successfully flowing by balance weight 170 and
And balance weight 170 will not stir or excessively stir fluid to realize controlled and optimization fluid flow path FP (referring to Fig. 3 A
With Fig. 3 B).In addition, point of flow separation rearward displacement after also making balance weight 170 and making the tail at 170 rear of balance weight
It flows region reduction or negative pressure reduces.As a result, reduce not only pressure PF at the front end 175 (windward side) of balance weight 170 and
And also reduce resistance WF caused by wake flow (turbulent flow) at the tail end 177 of balance weight 170, also that is, making balance weight 170
During exercise suffered pressure drag and then head resistance (because fluid there are due to cause) reduce.In this way, especially flat
Weighing, there are moving components (such as rotor) attached by moving fluid stream and/or balance weight 170 to need to carry out for environment locating for block
In the compressor (such as variable speed compressor of high-speed motion) of high-speed motion (such as 3600 revs/min or more), due to balance weight into
And the resistance of motion (fluid resistance) suffered by moving component attached by balance weight (i.e. entire rotational structure) reduces, therefore turns
The power consumption of dynamic structure and then compressor is reduced.On the other hand, flat due to being provided with sectional dimension in balance weight 170
The transition portion of gradualization may be not present or less exist sectional dimension part jumpy, therefore can be avoided stress collection
In to increasing the intensity (fatigue strength) of balance weight.Another aspect, there are lubricating oil for the environment locating for such as balance weight
In the case where stream, since fluid flow path is controlled and managed with being optimised, lubricating oil is balanced block agitation and smashes
Degree reduce, carried by working fluid and the case where cause compressor oil starvation so as to avoid the occurrence of excessive lubricating oil.
In addition, with only simple round corner treatment is done and front end and/or tail end in the end of front end and/or tail end
Portion is not apered to tapered shape, and (such as at least one of two sides tilt prolonging to two sides toward each other
Long line is simultaneously uncrossed and form end angle) balance weight compare, balance weight 27 in tapered shape is due to flowing through overbalance
The fluid flow path of block 170 is controlled better and manages and the turbulent flow of balance weight 170 is preferably inhibited and made
The power consumption for obtaining rotational structure is greatly reduced.
Inventor is to being equipped with the screw compressor of a certain model of the balance weight of first embodiment according to the present invention
Performance is tested.At the same time, scroll compression of the inventor to the same model for being equipped with the balance weight according to the relevant technologies
The performance of machine is tested.Two tests are carried out in identical test condition, and test related two screw compressors
Other structures are all the same other than balance weight.Test result is listed in table 1.
Table 1
As can be seen from Table 1, it compared with the compressor according to the balance weight of the relevant technologies is installed, is equipped with according to first
The compressor of the balance weight of embodiment all has advantage on every test performance.Particularly, according to first embodiment
Compressor in, system power consumption and constitute system power consumption major part compressor power consumption reduce, accordingly
Ground Energy Efficiency Ratio then increases.For example, system power consumption reduces about for the market demand (MRE) full load mode
2.5%, and for sub-load (50/100) operating condition, system power consumption reduces about 1.0%.In addition, also from table 1
It can be seen that the reduction degree of system power consumption is bigger when compressor operates at a higher speed.
Balance weight 170B (the figure of second embodiment according to the present invention is described referring to Fig. 5 A, Fig. 5 B, Fig. 5 C and Fig. 6
5A is the perspective view for showing the balance weight of second embodiment according to the present invention, and Fig. 5 B and Fig. 5 C are to be shown respectively according to the present invention
The front end of the balance weight of second embodiment and the side view of tail end, and Fig. 6 is to show the second embodiment party according to the present invention
The balance weight of formula is installed to the perspective view of the state of rotor).
For brevity, it is hereinafter described main according to the balance weight 170B of second embodiment and according to first in fact
Apply the difference of the balance weight 170 of mode.
In the counterweight part 174 of balance weight 170B, front end 175 has connection radially inner side portion 1751 and radially outer side portions
1752 axial end surface 1754 away from attachment 172.Radially inner side portion 1751 and radially outer side portions 1752 can edges respectively
Counterweight part 174 radially inner side portion benchmark circular arc line IA and radially outer side portions benchmark circular arc line OA extend.Axial end surface
1754 can tilt axially and circumferentially (in other words towards the receipts of attachment 172 towards attachment 172 (i.e. towards end 1753)
Hold together) so that front end 175 and tail end 177 are configured with the tapered shape towards respective end tapered (or gathering).This
In, it should be pointed out that this surface angled manner of axial end surface 1754 is are as follows: axial direction and peripheral, oblique but it is radial not
Inclined surface angled manner and hereinafter it is properly termed as " second surface angled manner ".End 1753 can do smooth place
Reason is smoothly connected at end 1753 with attachment 172 to the axial end surface 1754 of front end 175 and tail end 177.
As shown in Figure 5 B, when radially, (radial direction of compressor 100) observes balance weight 170B, front end
175, which are formed by end angle γ, can be greater than 0 degree and less than 90 degree for acute angle.In some instances, end angle γ can
Be preferably 15 degree to 75 degree, more preferably 30 degree to 60 degree and even more preferably be 45 degree (or substantially 45
Degree).
As shown in Figure 5 C, when radially observing balance weight 170B, tail end 177 is formed by end angle δ can
Think that acute angle is greater than 0 degree and less than 90 degree.In some instances, end angle δ can advantageously be 15 degree to 75 degree, it is more excellent
Selection of land is 30 degree to 60 degree and even more preferably is 45 degree (or substantially 45 degree).In addition, end angle γ and end angular
Spending δ can be equal or unequal.
Also the power for reducing rotational structure and then compressor can be brought to disappear according to the balance weight 170B of second embodiment
Consume and increase the advantageous effects of the intensity of balance weight.Compared with balance weight 170 according to first embodiment, according to
The balance weight 170B of two embodiments may be more easier in manufacture view, but especially disappear in system dynamic in aspect of performance
Consumption aspect is less better.In at least one radial side to balance in the inclined first embodiment of first surface angled manner
Fluid around block 170 can more smoothly and the two sides of balance weight 170 are passed through in successfully flowing, thus suffered by rotational structure
The resistance of motion (fluid resistance) arrived is smaller.
Referring to Fig. 7 A, Fig. 7 B and Fig. 8 description according to the present invention third embodiment balance weight 170C (Fig. 7 A be show
The perspective view of the formula balance weight symmetrical above and below of third embodiment, Fig. 7 B are to show third reality according to the present invention according to the present invention out
The perspective view of the non-formula balance weight symmetrical above and below of mode is applied, and Fig. 8 is the balance weight for showing third embodiment according to the present invention
It installs to the perspective view of the state of drive shaft).
Balance weight 170C is adapted for attachment to drive shaft 134.For example, balance weight 170C can be attached to the position of drive shaft 134
In the upper part of 138 upside of rotor, the lower part for being located at 138 downside of rotor of drive shaft 134 can also be attached to.
Balance weight 170C may include attachment 172C and counterweight part 174C.
Attachment 172C can be in generally fan-shaped and be provided with fastener hole 171C (for example, circle as shown in Figure 7 A is tight
Solid hole and D-shaped fastener hole as shown in Figure 7 B).The corresponding part that fastener hole 171C is adapted for attachment to drive shaft 134 (such as passes through
Interference fit) balance weight 170C is thus securely attached to drive shaft 134.
Counterweight part 174C may include axially upward from the upper surface (corresponding to first axis surface) of attachment 172C
The upper counterweight part 1741C (corresponding to the first counterweight part) extended and the lower surface from attachment 172C (correspond to the second axial table
Face) the lower counterweight part 1742C (correspond to the second counterweight part) that axially extends downwardly.Upper counterweight part 1741C and lower counterweight part
1742C can be along fan-shaped edge (also that is, arc edge) centered on the hole heart of the fastener hole 171C week of attachment 172C
Extend to ground.In the example shown in the series of figures, the fan-shaped edge of attachment 172C and/or counterweight part 174C extend greatly in circumferential direction
Cause 180 degree.However, it is possible to conceive the fan-shaped edge of attachment 172C and/or other suitable circumferentially extendings of counterweight part 174C
Range.
Lower counterweight part 1742C may include the direction of rotation RD (rotation corresponding to drive shaft 134 about balance weight 170C
Direction) front end 175C and tail end 177C.The configuration of front end 175C and tail end 177C can be with first embodiments
In front end 175 it is identical with the configuration of tail end 177, thus details are not described herein.
In formula balance weight 170C symmetrical above and below as shown in Figure 7 A, lower counterweight part 1742C and upper counterweight part 1741C can be with
With identical or essentially identical configuration, so that balance weight 170C is symmetrical above and below about attachment 172C.
In non-formula balance weight 170C symmetrical above and below as shown in Figure 7 B, lower counterweight part 1742C is configured so that front end
175C and tail end 177C has the tapered shape towards respective end tapered (or gathering), and upper counterweight part 1741C is configured to
So that front end 175C and tail end 177C along counterweight part 174C radially inner and outer side benchmark circular arc line IA, OA extend (or
Person is configured so that front end 175C and tail end 177C is also in tapered shape but tapered degree i.e. end angle and lower counterweight part
1742C is different), thus balance weight 170C is about attachment 172C or more asymmetry.Before upper counterweight part 1741C is configured so that
In the case that end 175C and tail end 177C extends along radially inner and outer side benchmark circular arc line IA, OA of counterweight part 174C,
Simple round corner treatment can be done in the end 1773C of the end 1753C and tail end 177C of front end 175C (not to be apered to
Tapered shape --- for example and not formed end angular degree or to be formed by end angle not be small acute angle).
Alternatively, non-formula balance weight 170C symmetrical above and below can be configured to: the front end 175C of upper counterweight part 1741C and
Tail end 177C there is the tapered shape towards respective end tapered (or collapse) and the front end 175C of lower counterweight part 1742C and
Tail end 177C does not have tapered shape.
It can be brought and 170 energy of balance weight according to first embodiment according to the balance weight 170C of third embodiment
The essentially identical advantageous effects of enough bring advantageous effects.
Balance weight according to the present invention can allow a variety of different modifications.
It, can be with other than radially inner side portion 1751 tilts radially outward towards end for first embodiment
Radially outer side portions 1752 is configured to tilt radially inward towards end (as shown in Figure 9 --- Fig. 9 is to show according to the present invention
The perspective view of the variation example of the balance weight of first embodiment).Furthermore it is also possible to conceive, radially inner side portion 1751 do not tilt and
Only radially outer side portions 1752 tilts radially inward towards end.Here, it is also pointed out that, third embodiment is similarly
Also these alternative solutions be can have.The alternative solution of the Double-sided inclination of third embodiment is shown in Figure 11 A and Figure 11 B
(Figure 11 A and Figure 11 B are the perspective view and plane that the variation example of the balance weight of third embodiment according to the present invention is shown respectively
Figure).
For first embodiment: radially inner side portion 1751 can tilt radially outward towards end, and additionally
Or alternatively, radially inner side portion 1751 can be tilted radially outward towards axial end surface 1754 (also that is, radially inner side portion
1751 it is tapered towards axial end surface 1754 rather than in the axial direction be in flat；And this surface angled manner is
Are as follows: it axially and radially tilts still circumferential not inclined surface angled manner and is hereinafter properly termed as " inclining on third surface
Rectangle formula ")；And/or radially outer side portions 1752 can tilt radially inward towards end, and additionally or substitution
Property, radially outer side portions 1752 can tilt (gradually towards axial end surface 1754 radially inward towards axial end surface 1754
Contracting).Moreover, it is also pointed out that, third embodiment similarly also can have these alternative solutions.
For second embodiment, (second surface inclination side axially and is circumferentially tilted in addition to axial end surface 1754
Formula) except, it can be with: radially inner side portion 1751 and/or radially outer side portions 1752 are configured to incline with third surface angled manner
Tiltedly (as shown in Figure 10 --- Figure 10 is the perspective view for showing the variation example of the balance weight of second embodiment according to the present invention)；And
And/or person, radially inner side portion 1751 and/or radially outer side portions 1752 are configured to the inclination of first surface angled manner.
First embodiment and third embodiment can be respectively in conjunction with second embodiments, for example, can be additionally
Make according to first embodiment with the axial end surface of third embodiment 1754,1774 with the inclination of second surface angled manner.
In short, according to the present invention, for front end and/or tail end (i.e. one or both of front end and tail end)
Radially inner side portion, radially outer side portions, axial at least one of end surfaces up and down, first surface angled manner can be used
(i.e. radial direction and peripheral, oblique but axial does not tilt), second surface angled manner (i.e. axial direction and peripheral, oblique but it is radial not
Inclination) and one of third surface angled manner (i.e. axially and radially inclination but circumferential does not tilt) or a variety of surfaces tilt
Mode, as long as making the terminal surface of front end and/or the end of tail end (i.e. one or both of front end and tail end)
Product reduce and/or be preferably so that front end and/or tail end be in towards end (circumferential ends i.e. windward side) it is tapered (or
Collapse) tapered shape.
In addition, balance weight according to the present invention can also be attached to other rotations in addition to rotor 138 and drive shaft 134
Turn/rotatable parts, for example, balance weight according to the present invention can be attached to the hub for carrying out the dynamic vortex component 150 of moving
156。
In addition, in embodiment as described above, balance weight include suitable for and rotary part attachment attachment.So
And, it is contemplated that, balance weight does not include attachment as described above.In this case, (Figure 12 is to show as shown in figure 12
The perspective view of the variation example of the counterweight part of first embodiment according to the present invention out), balance weight 170D can be configured to only include
Suitable for being directly attached to (crescent) counterweight part 174 of the end of rotor 138.Moreover, although being not shown, it is flat for shaft-like formula
Weigh block 170C, also can be omitted attachment 172C and is configured and adapted to counterweight part 174C to be directly attached to drive shaft 134.
In addition, can also only be arranged one in upper counterweight part 1741C and lower counterweight part 1742C for third embodiment
Person.
In addition, other than being suitable for screw compressor, balance weight according to the present invention is also applied for for example that there is also inclined
Other rotary machines (such as rotor compressor) of concentric mechanism.
In short, according to the present invention it is possible to including following advantageous scheme.
In balance weight according to the present invention, the front end also has preceding radially inner side portion, preceding radially outer side portions and preceding
Axial end surface, the tail end also have the inside side of tail footpath, tail radially outer side portions and tail axial end surface.
In balance weight according to the present invention: the preceding radially inner side portion inclines radially outward towards the preceding circumferential ends
Tiltedly, and/or, the preceding radially outer side portions tilts radially inward towards the preceding circumferential ends；The tail footpath is inwardly
Portion tilts radially outward towards the tail circumferential ends, and/or, the tail radially outer side portions is circumferential last towards the tail
End tilts radially inward.
In balance weight according to the present invention, when in axial direction observing, the front end is formed by front end angle
Degree is 15 degree to 50 degree, and/or, it is 15 degree to 50 degree that the tail end, which is formed by tail end angle,.
In balance weight according to the present invention, the front end angle is about 30 degree, and/or, the tail end
Angle is about 30 degree.
In balance weight according to the present invention: the preceding radially inner side portion towards the preceding axial end surface radially outward
Inclination, and/or, the preceding radially outer side portions tilts radially inward towards the preceding axial end surface；The tail footpath to
Inside portion tilts radially outward towards the tail axial end surface, and/or, the tail radially outer side portions is towards the tail
Axial end surface tilts radially inward.
In balance weight according to the present invention, the preceding circumferential ends in arcuation and with the preceding radially inner side portion and institute
Radially outer side portions is smoothly connected before stating, and/or, the tail circumferential ends in arcuation and with the inside side of the tail footpath
Smoothly it is connected with the tail radially outer side portions.
In balance weight according to the present invention, the balance weight is adapted for attachment to the rotary part of rotary machine, described
Balance weight further includes the attachment integrally or seperatedly formed with the counterweight part, and the counterweight part is suitable for via the attachment
It installs to the rotary part in portion.
In balance weight according to the present invention, the rotary part is the rotor of the rotary machine, the attachment
In general toroidal and it is adapted for attachment to the axial end portion of the rotor.
In balance weight according to the present invention, the counterweight part is from the attachment and the surface that is attached to the rotor
Opposite counterweight surface axially extends and is formed as partial circle shape.
In balance weight according to the present invention, the counterweight part extends about 180 degree in circumferential direction.
In balance weight according to the present invention, the rotary part is the drive shaft of the rotary machine, the attachment
Portion is in generally fan-shaped and is provided with fastener hole, and the fastener hole is adapted for attachment to the corresponding part of the drive shaft.
In balance weight according to the present invention, the counterweight part include from the first axis surface of the attachment axially
The first counterweight part for extending and/or from second axial surface opposite with the first axis surface of the attachment axially
The second counterweight part extended.
In balance weight according to the present invention, first counterweight part circumferentially prolongs along the fan-shaped edge of the attachment
About 180 degree is stretched, and/or, second counterweight part extends circumferentially over upon about 180 along the fan-shaped edge of the attachment
Degree.
It include first counterweight part and second counterweight part in the counterweight part in balance weight according to the present invention
In the case where the two: first counterweight part and second counterweight part are tapered towards corresponding circumferential ends, so that described
Balance weight is symmetrical about the attachment；Alternatively, only one in first counterweight part and second counterweight part is towards phase
The circumferential ends answered are tapered, so that the balance weight is asymmetric about the attachment.
In balance weight according to the present invention, the preceding axial end surface is axially and circumferential towards the preceding circumferential ends
Ground inclination, and/or, the tail axial end surface tilts axially and circumferentially towards the tail circumferential ends.
In balance weight according to the present invention: the preceding radially inner side portion towards the preceding axial end surface radially outward
Inclination, and/or, the preceding radially outer side portions tilts radially inward towards the preceding axial end surface；The tail footpath to
Inside portion tilts radially outward towards the tail axial end surface, and/or, the tail radially outer side portions is towards the tail
Axial end surface tilts radially inward.
In balance weight according to the present invention, when radially observing, the front end is formed by front end angle
Degree is 30 degree to 60 degree, and/or, it is 30 degree to 60 degree that the tail end, which is formed by tail end angle,.
In balance weight according to the present invention, the balance weight is adapted for attachment to the rotary part of rotary machine, described
Balance weight further includes the attachment integrally or seperatedly formed with the counterweight part, and the attachment is suitable for the counterweight part
Installation makes the axial end surface in the preceding week to the rotary part and the preceding circumferential ends by smoothing processing
Smoothly it is connected at terminad with the attachment, and/or, the tail circumferential ends make the axis by smoothing processing
Smoothly it is connected at the tail circumferential ends with the attachment to end surfaces.
In rotary machine according to the present invention, the rotary machine is screw compressor, the screw compressor
Rotor and drive shaft including being used as the rotary part.
In present specification, directional terminology "top", "up" and "down" etc. use only merely for convenient for description purpose,
It should not be taken as restrictive.
Although referring to illustrative embodiments, invention has been described, but it is to be understood that the present invention is not
It is confined to the specific embodiment be described in detail and shown in text, without departing from claims limited range the case where
Under, those skilled in the art can make various changes to illustrative embodiments.
Claims (17)
1. a kind of balance weight (170,170B, 170C, 170D), the balance weight are adapted for attachment to the rotation of rotary machine (100)
Rotation member (134,138), the balance weight include counterweight part (174,174C) and with the counterweight part (174,174C) one
Ground or seperated the attachment (172,172C) formed, the attachment are suitable for installing the counterweight part to the rotating part
Part, the counterweight part include the direction of rotation (RD) about the counterweight part front end (175,175C) and tail end (177,
177C), the front end has preceding circumferential ends (1753,1753C), preceding radially inner side portion (1751), preceding radially outer side portions
(1752) and preceding axial end surface (1754), the tail end have tail circumferential ends (1773,1773C), the inside side of tail footpath
(1771), tail radially outer side portions (1772) and tail axial end surface (1774),
Wherein, at least one of the front end and the tail end are configured to tapered towards corresponding circumferential ends,
The preceding axial end surface (1754) tilts axially and circumferentially towards the preceding circumferential ends (1753,1753C), and
And/or person, the tail axial end surface (1774) are inclined axially and circumferentially towards the tail circumferential ends (1773,1773C)
Tiltedly,
The preceding circumferential ends (1753,1753C) make the preceding axial end surface (1754) before described by smoothing processing
Smoothly it is connected at circumferential ends with the attachment, and/or, the tail circumferential ends (1773,1773C) are by smooth
Processing is so that the tail axial end surface (1774) is smoothly connected at the tail circumferential ends with the attachment.
2. balance weight (170,170C, 170D) according to claim 1, in which:
The preceding radially inner side portion (1751) tilts radially outward towards the preceding circumferential ends (1753,1753C), and/
Alternatively, the preceding radially outer side portions (1752) tilts radially inward towards the preceding circumferential ends (1753,1753C),
The inside side of tail footpath (1771) tilts radially outward towards the tail circumferential ends (1773,1773C), and/
Alternatively, the tail radially outer side portions (1772) tilts radially inward towards the tail circumferential ends (1753,1753C).
3. balance weight (170,170C, 170D) according to claim 2, wherein when in axial direction observing, before described
It is 15 degree to 50 degree that end (175,175C), which is formed by front end angle (α), and/or, the tail end (177,
177C) being formed by tail end angle (β) is 15 degree to 50 degree.
4. balance weight (170,170C, 170D) according to claim 3, wherein the front end angle (α) is about 30
Degree, and/or, the tail end angle (β) is about 30 degree.
5. balance weight (170,170C, 170D) according to claim 2, in which:
The preceding radially inner side portion (1751) tilts radially outward towards the preceding axial end surface (1754), and/or,
The preceding radially outer side portions (1752) tilts radially inward towards the preceding axial end surface (1754),
The inside side of tail footpath (1771) tilts radially outward towards the tail axial end surface (1774), and/or,
The tail radially outer side portions (1772) tilts radially inward towards the tail axial end surface (1774).
6. balance weight (170,170C, 170D) according to claim 2, wherein the preceding circumferential ends (1753,
It is in 1753C) arcuation and is smoothly connected with the preceding radially inner side portion (1751) and the preceding radially outer side portions (1752), and
And/or person, the tail circumferential ends (1773,1773C) in arcuation and with the inside side of the tail footpath (1771) and the tail
Radially outer side portions (1772) is smoothly connected.
7. balance weight (170,170B) according to any one of claim 1 to 6, wherein the rotary part (138) is
The rotor (138) of the rotary machine (100), the attachment (172) is in general toroidal and is adapted for attachment to described turn
The axial end portion (138a, 138b) of sub (138).
8. balance weight (170,170B) according to claim 7, wherein the counterweight part (174) is from the attachment
(172) the counterweight surface (137) opposite with the surface for being attached to the rotor (138) axially extends and is formed as part
Circular ring shape.
9. balance weight (170,170B) according to claim 8, wherein the counterweight part (174) is prolonged in circumferential direction
Stretch about 180 degree.
10. balance weight (170C) according to any one of claim 1 to 6, wherein the rotary part (134) is institute
The drive shaft (134) of rotary machine (100) is stated, the attachment (172C) is in generally fan-shaped and is provided with fastener hole
(171C), the fastener hole (171C) are adapted for attachment to the corresponding part of the drive shaft (134).
11. balance weight (170C) according to claim 10, wherein the counterweight part (174C) includes from the attachment
The first counterweight part (1741C) that the first axis surface of (172C) axially extends and/or from the attachment (172C) with
The second counterweight part (1742C) that the second opposite axial surface of the first axis surface axially extends.
12. balance weight (170C) according to claim 11, wherein first counterweight part (1741C) is along described attached
The fan-shaped edge of socket part (172C) extends circumferentially over upon about 180 degree, and/or, second counterweight part (1742C) is along institute
The fan-shaped edge for stating attachment (172C) extends circumferentially over upon about 180 degree.
13. balance weight (170C) according to claim 11, wherein in the counterweight part (174C) include described first matching
In the case where weight portion (1741C) and second counterweight part (1742C) the two: first counterweight part (1741C) and described
Two counterweight parts (1742C) are tapered towards corresponding circumferential ends, so that the balance weight (170C) is about the attachment
(172C) is symmetrical；Alternatively, only one in first counterweight part (1741C) and second counterweight part (1742C) is towards phase
The circumferential ends answered are tapered, so that the balance weight (170C) is about the attachment (172C) asymmetry.
14. balance weight (170,170B, 170C, 170D) according to claim 1, in which:
The preceding radially inner side portion (1751) tilts radially outward towards the preceding axial end surface (1754), and/or,
The preceding radially outer side portions (1752) tilts radially inward towards the preceding axial end surface (1754),
The inside side of tail footpath (1771) tilts radially outward towards the tail axial end surface (1774), and/or,
The tail radially outer side portions (1772) tilts radially inward towards the tail axial end surface (1774).
15. balance weight (170,170B, 170C, 170D) according to any one of claim 1 to 6, wherein when radially
When direction is observed, it is 30 degree to 60 degree that the front end (175), which is formed by front end angle (γ), and/or, the tail
It is 30 degree to 60 degree that end (177), which is formed by tail end angle (δ),.
16. a kind of rotary machine (100), wherein the rotary machine (100) includes as any in claim 1 to 15
Balance weight (170,170B, 170C, 170D) described in.
17. rotary machine (100) according to claim 16, wherein the rotary machine (100) is scroll compression
Machine (100), the screw compressor (100) include rotor (138) and drive shaft (134) as the rotary part.
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| CN201510640769.4A CN106555755B (en) | 2015-09-30 | 2015-09-30 | Balancing weight and rotary machine comprising same |
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| CN201510640769.4A CN106555755B (en) | 2015-09-30 | 2015-09-30 | Balancing weight and rotary machine comprising same |
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| WO2020083312A1 (en) * | 2018-10-23 | 2020-04-30 | 艾默生环境优化技术(苏州)有限公司 | Counterweight, counterweight assembly and scroll compressor |
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| JPS62271984A (en) * | 1986-05-21 | 1987-11-26 | Hitachi Ltd | Enclosed-type scroll compressor |
| JP2011099377A (en) * | 2009-11-05 | 2011-05-19 | Mitsubishi Electric Corp | Refrigerant compressor |
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| JP2004218471A (en) * | 2003-01-10 | 2004-08-05 | Matsushita Electric Ind Co Ltd | Hermetic electric compressor |
| JP2004270654A (en) * | 2003-03-12 | 2004-09-30 | Denso Corp | Rotary compressor |
| CN1862919A (en) * | 2005-05-10 | 2006-11-15 | 乐金电子(天津)电器有限公司 | Motor rotor counterbalance structure for compressor |
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