CN106555755A - Balancing weight and rotary machine comprising same - Google Patents
Balancing weight and rotary machine comprising same Download PDFInfo
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- CN106555755A CN106555755A CN201510640769.4A CN201510640769A CN106555755A CN 106555755 A CN106555755 A CN 106555755A CN 201510640769 A CN201510640769 A CN 201510640769A CN 106555755 A CN106555755 A CN 106555755A
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- balance weight
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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 the rotary machine including the balance weight, more particularly, to energy
It is enough that improved balance weight is made in terms of power consumption.
Background technology
In the rotary machine including moving component (such as compression mechanism, motor, rotary shaft etc.)
In (such as compressor is particularly screw compressor), in machine operation due to the fortune of moving component
Move (for example rotate) uneven and vibration, noise etc. can be increased.In some cases, motion portion
The motion imbalance of part is missed due to the processing of moving component itself and/or the component installed thereon
Difference and cause barycenter uneven and caused.In other situations, the motion of moving component is uneven
It is due to expressly arranging eccentric structure in moving component itself and/or the component installed thereon
It is caused to realize specific function (for example, in screw compressor, to arrange inclined at drive shaft
Heart pin makes dynamic vortex carry out circular translational relative to determine vortex with using eccentric center principle).
It is uneven for this motion, arrange generally on moving component and reverse centrifugal force can be provided
Balance weight it is uneven so as to reducing vibration and noise with the motion produced by balancing.
Balance weight is moved with the motion of moving component.Rotate at a high speed, put down in such as moving component
There is gas stream in the environment residing for weighing apparatus block, and/or the environment residing for balance weight has liquid flow (example
As oil stream) application scenarios in, the presence of balance weight can cause the resistance of motion of moving component to increase
So as to cause system dynamic consumption to increase.In addition, if balance weight is thus resulted in due to originals such as shapes
Intensity is not enough, then the balance weight in high-speed motion is readily able to fracture (such as fatigue fracture).
Here, it is noted that the technology contents provided in this part are intended to contribute to ability
Field technique personnel's the understanding of the present invention, and not necessarily constitute prior art.
The content of the invention
Total summary of the present invention, rather than complete scope of the present invention or the present invention are provided in this part
The comprehensive disclosure of all features.
It is an object of the present invention to provide a kind of end that can reduce leading section and/or tail end
The balance weight of area.
It is a further object of the present invention to provide one kind can make fluid smoothly and the Jing that successfully flows
The balance weight of overbalance block.
It is a further object of the present invention to provide one kind can make balance weight not stir or excessively stir
Fluid so as to realize it is controlled and optimize fluid flow path balance weight.
It is a further object of the present invention to provide a kind of point of flow separation that can be made after balance weight to
Backward shift and make balance weight rear velocity wake region reduce or negative pressure reduce balance weight.
It is a further object of the present invention to provide a kind of pressure that balance weight can be made suffered at the volley
The balance weight that difference resistance and then head resistance reduce.
It is a further object of the present invention to provide a kind of can reduce the dynamic of rotational structure and then compressor
The balance weight that power is consumed.
It is a further object of the present invention to provide one kind can avoid stress concentration so as to increase balance weight
Intensity balance weight.
Other purposes of the present invention are to provide a kind of rotary machine including above-mentioned balance weight.
One or more in achieve these goals, according to an aspect of the present invention, there is provided
A kind of balance weight, the balance weight include counterweight part, and the counterweight part is included with regard to the counterweight part
The leading section of direction of rotation and tail end, the leading section have front circumferential ends, the tail end
With tail circumferential ends.At least one of the leading section and the tail end are configured to towards phase
The circumferential ends answered are tapered.
One or more in achieve these goals, according to a further aspect in the invention, there is provided
A kind of rotary machine.The rotary machine includes balance weight as above.
In balance weight of the invention, leading section and tail end itself and then whole balance weight shape
Into the fairing with streamline shape (particularly leading section and tail end are in tapered fairing).
Therefore, the terminus area (windward side area) and the terminus area of tail end of leading section is reduced,
And cause the fluid around balance weight smoothly and successfully flow through balance weight and balance
Block will not stir or excessively stir fluid so as to realize fluid flow path that is controlled and optimizing.Separately
Outward, also so that point of flow separation rearward displacement after balance weight and causing the tail at balance weight rear
Stream region reduces or negative pressure reduces.Thus, not only make leading section (windward side) place of balance weight
Pressure reduces and reduces the resistance caused by the wake flow (turbulent flow) at the tail end of balance weight,
That is, so that balance weight pressure drag suffered at the volley and then head resistance are (because of fluid
Exist and cause) reduce.So, especially there is moving fluid stream in the environment residing for balance weight
And/or the moving component (such as rotor) attached by balance weight needs to carry out high-speed motion (for example
More than 3600 revs/min) compressor (variable speed compressor of such as high-speed motion) in, due to flat
Motion resistance suffered by weighing apparatus block and then the moving component (i.e. whole rotational structure) attached by balance weight
Power (fluid resistance) reduces, therefore the power consumption of rotational structure and then compressor is reduced.
On the other hand, do not deposit as the transition portion of sectional dimension smooth variation is provided with balance weight
Or less there is sectional dimension part jumpy, therefore, it is possible to avoid stress concentration so as to
Increase the intensity (fatigue strength) of balance weight.Another aspect, in the ring residing for such as balance weight
In the case that border has lubricating oil stream, as fluid flow path is controlled and is managed with being optimised,
Therefore lubricating oil is balanced block agitation and the degree reduction smashed, such that it is able to avoid the occurrence of excessive profit
Lubricating oil is carried by working fluid and causes the situation of compressor oil starvation.
Description of the drawings
By description referring to the drawings, the feature of one or more embodiments of the present invention and excellent
Point will become better understood by, in the accompanying drawings：
Figure 1A and Figure 1B are the stereogram for illustrating the balance weight according to correlation technique；
Fig. 2 is the sectional side elevation for illustrating the screw compressor for applying balance weight of the invention；
Fig. 3 A and Fig. 3 B is respectively the solid for illustrating the balance weight according to first embodiment of the invention
Figure and plan；
Fig. 4 is to illustrate the state that rotor is attached to according to the balance weight of first embodiment of the invention
Stereogram；
Fig. 5 A are the stereogram for illustrating the balance weight according to second embodiment of the invention；
Fig. 5 B and Fig. 5 C are the front end that the balance weight according to second embodiment of the invention is shown respectively
Portion and the side view of tail end；
Fig. 6 is to illustrate the state that rotor is attached to according to the balance weight of second embodiment of the invention
Stereogram；
Fig. 7 A are the solid for illustrating the formula balance weight symmetrical above and below according to third embodiment of the invention
Figure；
Fig. 7 B are illustrate formula balance weight non-symmetrical above and below according to third embodiment of the invention vertical
Body figure；
Fig. 8 is to illustrate the state that drive shaft is attached to according to the balance weight of third embodiment of the invention
Stereogram；
Fig. 9 is the stereogram of the modified example for illustrating the balance weight according to first embodiment of the invention；
Figure 10 is the stereogram of the modified example for illustrating the balance weight according to second embodiment of the invention；
Figure 11 A and Figure 11 B are the change that the balance weight according to third embodiment of the invention is shown respectively
The stereogram and plan of type example；And
Figure 12 is the stereogram of the modified example for illustrating the counterweight part according to first embodiment of the invention.
Specific embodiment
With reference to the accompanying drawings, describe the present invention by illustrative embodiments.To this
That what is invented is described in detail below merely for the sake of illustration purpose, and is definitely not to the present invention and its application
Or the restriction of purposes.
First, the scroll compression for applying balance weight of the invention is summarily described with reference to Fig. 2
(Fig. 2 is applied according to this structure of machine (being used as rotary machine of the invention) to illustrate
The sectional side elevation of the screw compressor of the balance weight of invention).
As shown in Fig. 2 screw compressor 100 can include housing 110.Can in housing 110
To define internal space S.Internally in space S, stationary fluid or moving fluid can be there are
Stream (the gas stream for for example being formed by working fluid and the liquid flow formed by lubricating oil).
Screw compressor 100 can also include drive mechanism 130.Drive mechanism 130 can include
Electro-motor 132 and drive shaft 134 (corresponding to rotary part).Electro-motor 132 can include
Stator 137 and rotor 138 (corresponding to rotary part).Stator 137 may be fixedly attached to shell
The inner circumferential wall of enclosure body 110a of body 110, and rotor 138 can regularly be enclosed within driving
Integratedly rotating with drive shaft 134 on axle 134.Can set at the top ends of drive shaft 134
It is equipped with cam pin 139.
Screw compressor 100 can also include main bearing seat 180.Main bearing seat 180 can be fixed
Be connected to housing 100 enclosure body 110a inner circumferential wall.Main bearing seat 180 is suitable to Jing
A part for drive shaft 134 is supported by the base bearing 182 being arranged in main bearing seat 180.
Screw compressor 100 can also include the pressure for being suitable to compression work fluid (such as cold-producing medium)
Contracting mechanism CM.Compression mechanism CM can include dynamic vortex part 150 and determine vortex part 160.
Dynamic vortex part 150 can include：Substrate 152；Face upwards from the upper table of substrate 152 and prolong
The dynamic scrollwork 154 of helical form stretched；And the hub portion 156 extended downwardly from the lower surface of substrate 152.
Dynamic vortex part 150 can be arranged in main bearing seat 180, and by main bearing seat 180 axially
Being supported to carry out moving.Cam pin 139 can be drivingly coupled to (be inserted into) hub portion 156.
Determine vortex part 160 can include：Substrate 162；Face down from the following table of substrate 162 and prolong
The helical form stretched determines scrollwork 164.
Determine scrollwork 164 to be suitable to engage with dynamic scrollwork 154, so as to limit a series of such as crescent
Working fluid accommodating chamber.
When screw compressor 100 operates, electro-motor 132 is powered and makes rotor 138 and drive
Axle 134 integratedly rotates.At this moment, the cam pin 139 being for example integrally formed with drive shaft 134
Also rotate, so as to for example via the unloading bushing being placed between cam pin 139 and hub portion 156 (not
Sign) and/or driving bearing (sign) and drive hub portion 156, thus make dynamic vortex part
150 carry out translation relative to determine vortex part 160 by such as cross slip-ring (sign) turns
Dynamic i.e. moving (that is, the axis of the axis of dynamic vortex part 150 relative to determine vortex part 160
Revolution, but dynamic vortex part 150 is not rotated about the axis thereof itself).Thus, by determining scrollwork
The 164 each accommodating chambers limited with dynamic scrollwork 154 are in the process moved from radial outside to radially inner side
In from untight suction chamber be changed into close discharge chambe be changed into again central high pressure room (have maximal pressure
Power), and volume is gradually from large to small.So, the pressure in accommodating chamber also gradually rises, from
And working fluid is compressed and the final outlet (sign) from determine vortex substrate 162 is discharged
Pressure is expelled to higher-pressure region HR (part for internal space S) and then via accessory 191 is discharged
Outside contracting machine.
Screw compressor 100 can also include balance weight 170 (according to first embodiment of the invention
Balance weight 170).As shown in Fig. 2 balance weight 170 can include being attached to the upper of rotor 138
The upper balance weight 170 of end 138a and the lower balance weight 170 of the lower end 138b for being attached to rotor 138.
Balance weight 170 can provide reverse centrifugal force and for example rotated through by dynamic vortex part 150 with balancing
Centrifugal force (positive centrifugal force) produced by journey, thus makes whole rotational structure realize dynamic balancing
So as to reduce vibration and noise.
The balance according to first embodiment of the invention is described referring to Fig. 3 A, Fig. 3 B and Fig. 4
(Fig. 3 A and Fig. 3 B respectively illustrates the balance weight according to first embodiment of the invention to block 170
Stereogram and plan, and Fig. 4 is to illustrate to be installed according to the balance weight of first embodiment of the invention
To the stereogram of the state of rotor).
Due to upper balance weight 170 it is essentially identical with the structure of lower balance weight 170, therefore for succinct
Purpose, is hereinafter mainly described to upper balance weight 170.
As shown in Figure 3 A and Figure 3 B, upper balance weight 170 can include attachment 172 and counterweight part
174。
Attachment 172 can in general toroidal (can also be in part-toroidal in other examples),
And it is adapted for attachment to the upper end 138a of rotor 138 to be thus regularly attached upper balance weight 170
To rotor 138.Attachment 172 can include the surfaces for attachment and the back of the body for being adapted for attachment to rotor 138
From the surface contrary with surfaces for attachment (also referred to as counterweight surface) 173 of rotor 138.At some
In example, upper balance weight 170 can be provided with the fastener hole 179 of such as screwed hole for example to pass through
Upper balance weight 170 is securely attached to rotor 138 by screw threads for fastening mode.In other examples,
Can be using other suitable fixed means for attachment.
Counterweight part 174 can axially be upwardly extended from counterweight surface 137 and be formed as part ring
Shape.In the example shown in the series of figures, counterweight part 174 extends substantially 180 degree in circumferential direction.However,
It is contemplated that the suitable circumferentially extending scope of other of counterweight part 174.
Counterweight part 174 can include (corresponding to and turning with regard to the direction of rotation RD of upper balance weight 170
Son 138 direction of rotation) leading section 175 and tail end 177.
According to first embodiment, the shape of counterweight part 174 is optimized.Especially, matching somebody with somebody
In weight portion 174, leading section 175 and tail end 177 are can be configured to towards respective end (week
Terminad) tapered (or draw in) tapered shape so that leading section 175 and tail end 177 are in
Substantially tapered.
Referring specifically to Fig. 3 A and Fig. 3 B, leading section 175 can include radially inner side portion 1751, footpath
Outside sidepiece 1752, (circumference) end 1753 and axial end surface 1754.Radially inner side portion 1751
Can from the radially inner side portion benchmark circular arc line IA of counterweight part 174 (that is, counterweight part 174
The imaginary extended line of the radially inner side portion circular arc of pars intermedia 176) towards end 1753 radially to
Outer deviation.That is, radially inner side portion 1751 can be inclined towards end 1753 radially outward (or
Person says that being radially oriented outside portion 1752 draws in).It is pointed out here that radially inner side portion 1751
This surface angled manner be：Still axially not inclined surface inclines for radial direction and peripheral, oblique
Mode and hereinafter it is properly termed as " first surface angled manner ".Radially outer side portions 1752 can
Extended with the radially outer side portions benchmark circular arc line OA along counterweight part 174.End 1753 can be with
Do rounding to process so as to be in arcuation and flat with radially inner side portion 1751 and radially outer side portions 1752
It is connected slidingly.
Thus, according to first embodiment, when in axial direction (axial direction of compressor 100)
(referring to Fig. 3 A and Fig. 3 B), the end formed by leading section 175 during balance weight 170 in observation
Angle [alpha] can be more than 0 degree for acute angle and be less than 90 degree.In some instances, end angle
α can advantageously be 7.5 degree to 70 degree, more preferably 15 degree to 50 degree, it is and further
More preferably 30 degree (or substantially 30 degree).
The configuration of tail end 177 can be similar to the configuration of leading section 175.Tail end 177 can be with
Including radially inner side portion 1771, radially outer side portions 1772, (circumference) end 1773 and axial end
Surface 1774, and the end angle beta (when in axial direction observing) for being formed can be acute angle
It is more than 0 degree and is less than 90 degree.In some instances, end angle beta can advantageously be 7.5
Spend to 70 degree, more preferably 15 degree to 50 degree, and even more preferably be 30 degree (or
Substantially 30 degree).
In some instances, end angle [alpha] can be equal to end angle beta.In other examples,
End angle [alpha] can be not equal to end angle beta.
So, as the leading section 175 in upper balance weight 170 and tail end 177 are in tapered shape
And rounding process, therefore leading section 175 and tail end are done in their end 1753,1773
177 itself and then whole upper balance weights 170 form the fairing with streamline shape (before particularly
End 175 and tail end 177 are in tapered fairing).
Compared with the balance weight according to correlation technique for example as shown in FIG. 1A and 1B, according to
The balance weight 170 (upper balance weight 170 and lower balance weight 170) of one embodiment at least being capable of band
Carry out Advantageous Effects as described below.
Figure 1A and Figure 1B are the stereogram for illustrating the balance weight according to correlation technique.
Shown by Figure 1A according to correlation technique for being attached in the balance weight 170' of rotor,
Counterweight part 174' is arranged on attachment along a part for the periphery of attachment 172' in annular
On the axial surface of 172', and the leading section 175' and tail end 177' of counterweight part 174' not courts
It is tapered so as to not in substantially tapered to respective end.Conversely, the end of leading section 175' and tail
The end of end 177' is in roughly planar, and counterweight part 174' in the end of leading section 175' and
The end of tail end 177' is not smoothly connected with attachment 172' but shape therebetween
Into sectional dimension stage portion jumpy (particularly, stage portion shape on whole radial extension
Into).
In the balance weight 170 for being attached to drive shaft according to correlation technique shown by Figure 1B "
In, counterweight part 174 " along in generally fan-shaped attachment 172 " and fan-shaped edge be arranged on attachment
The leading section 175 of the radial outside in portion 172 ", and counterweight part 174 " " and tail end 177 " is not
It is tapered so as to not in substantially tapered towards respective end.Conversely, leading section 175 " end
With tail end 177 " end be in roughly planar, and counterweight part 174 " in leading section 175 "
End and tail end 177 " end and attachment 172 " be not smoothly connected but two
Between person, (especially, stage portion is in whole axial direction model for Formation cross-section size stage portion jumpy
Place to be formed).
By contrast, in the balance weight 170 according to first embodiment, (upper balance weight 170 is with
Balance weight) in, leading section 175 and tail end 177 itself and then whole balance weight 170 form and have
(particularly leading section 175 and tail end 177 are in tapered streamline the fairing of streamline shape
Body).Therefore, the terminus area (windward side area) of leading section 175 and the end of tail end 177
End area is reduced, and the fluid around balance weight 170 is flowed smoothly and successfully
Through balance weight 170 and balance weight 170 will not stir or excessively stir fluid it is controlled so as to realize
And fluid flow path FP for optimizing (referring to Fig. 3 A and Fig. 3 B).In addition, also causing balance weight
Point of flow separation rearward displacement after 170 and the velocity wake region at 170 rear of balance weight is subtracted
Little or negative pressure reduces.Thus, not only make leading section 175 (windward side) place of balance weight 170
Pressure PF reduces and is drawn the wake flow (turbulent flow) at the tail end 177 of balance weight 170
The resistance WF for rising reduces, that is, so that the pressure drag suffered at the volley of balance weight 170
And then head resistance (causing because of the presence of fluid) reduces.So, especially in balance weight institute
There is moving fluid stream in the environment at place and/or the moving component attached by balance weight 170 (for example turns
Son) need the compressor for carrying out high-speed motion (such as more than 3600 revs/min) (for example to transport at a high speed
Dynamic variable speed compressor) in, the moving component due to balance weight and then attached by balance weight is (i.e. whole
Individual rotational structure) suffered by the resistance of motion (fluid resistance) reduce, therefore rotational structure is further
The power consumption of compressor is reduced.On the other hand, due to be provided with balance weight 170 cut
The transition portion of face size smooth variation and do not exist or less there is sectional dimension and drastically change
Part, therefore, it is possible to avoid stress concentration so as to increase the intensity (fatigue strength) of balance weight.
Another aspect, in the case where the environment residing for such as balance weight has lubricating oil stream, due to fluid
Flow path is controlled and is managed with being optimised, therefore lubricating oil is balanced block agitation and the journey smashed
Degree reduces, and is caused compressor to lack by working fluid carrying such that it is able to avoid the occurrence of excessive lubricating oil
The situation of oil.
In addition, processing and front end with only simple rounding is done in the end of leading section and/or tail end
Portion and/or tail end are not apered to tapered shape, and (for example at least one of two sidepieces are not
Incline toward each other so as to two sidepieces extended line and it is uncrossed and formed end angle) balance
Block is compared, and balance weight 27 in tapered shape is as flowing is through the flow of fluid of balance weight 170
Path is controlled better and manages and the turbulent flow of balance weight 170 is preferably suppressed and made
The power consumption for obtaining rotational structure is greatly reduced.
Inventor is to being provided with a certain model of the balance weight according to first embodiment of the invention
The performance of screw compressor is tested.At the same time, inventor is to being provided with according to correlation technique
The performance of screw compressor of same model of balance weight tested.Two tests are in identical
Test condition is carried out, and test two involved screw compressors in addition to balance weight other
Structure all same.Test result is listed in table 1.
Table 1
As can be seen from Table 1, compared with the compressor according to the balance weight of correlation technique is installed,
The compressor for being provided with the balance weight according to first embodiment is respectively provided with every test performance
Advantage.Especially, in the compressor according to first embodiment, system power consumption and composition
The compressor power consumption of system power consumption major part reduces, and correspondingly Energy Efficiency Ratio then increases
Greatly.For example, for the market demand (MRE) full load mode, system power consumption subtracts
It is little by about 2.5%, and for sub-load (50/100) operating mode, system power consumption subtracts
It is little by about 1.0%.In addition, from table 1 it can further be seen that when compressor is operated at a higher speed
When, the reduction degree of system power consumption is bigger.
Describe according to the second embodiment party of the invention referring to Fig. 5 A, Fig. 5 B, Fig. 5 C and Fig. 6
(Fig. 5 A are illustrate balance weight according to second embodiment of the invention vertical to the balance weight 170B of formula
Body figure, Fig. 5 B and Fig. 5 C are that the balance weight according to second embodiment of the invention is shown respectively
Leading section and the side view of tail end, and Fig. 6 is to illustrate according to the flat of second embodiment of the invention
Weighing apparatus block is attached to the stereogram of the state of rotor).
For brevity, hereinafter by the main balance weight 170B described according to second embodiment
With the difference of the balance weight 170 according to first embodiment.
In the counterweight part 174 of balance weight 170B, leading section 175 has connection radially inner side portion
1751 with the axial end surface 1754 away from attachment 172 of radially outer side portions 1752.Footpath is inside
Sidepiece 1751 and radially outer side portions 1752 can be respectively along the radially inner side portion bases of counterweight part 174
Director circle camber line IA and radially outer side portions benchmark circular arc line OA extends.Axial end surface 1754 can be with
(in other words direction is inclined towards attachment 172 (i.e. towards end 1753) axially and circumferentially
Attachment 172 is drawn in) so that leading section 175 and tail end 177 are configured with towards each
The tapered shape of end tapered (or drawing in).It is pointed out here that axial end surface 1754
This surface angled manner be：Still radially not inclined surface inclines for axial direction and peripheral, oblique
Mode and hereinafter it is properly termed as " second surface angled manner ".Can do flat in end 1753
It is sliding to process so as to the axial end surface 1754 of leading section 175 and tail end 177 is at end 1753
Smoothly it is connected with attachment 172.
As shown in Figure 5 B, (radial direction of compressor 100) observation balance when radially
During block 170B, the end angle γ formed by leading section 175 can for acute angle i.e. be more than 0 degree and
Less than 90 degree.In some instances, end angle γ can advantageously be 15 degree to 75 degree,
More preferably 30 degree to 60 degree, and be even more preferably 45 degree (or substantially 45 spend).
As shown in Figure 5 C, when balance weight 170B is radially observed, 177 shapes of tail end
Into end angle δ can be more than 0 degree and less than 90 degree for acute angle.In some instances,
End angle δ can advantageously be 15 degree to 75 degree, more preferably 30 degree to 60 degree, and
And even more preferably be 45 degree (or substantially 45 spend).In addition, end angle γ and end
Angle δ can with it is equal can also be unequal.
Reduction rotational structure can also be brought according to the balance weight 170B of second embodiment and then pressed
The power consumption of contracting machine and increase balance weight intensity Advantageous Effects.It is real with according to first
The balance weight 170 for applying mode is compared, may be in system according to the balance weight 170B of second embodiment
Make aspect to be more prone to, but one will be differed from terms of system dynamic consumption particularly in aspect of performance
A bit.In at least one radial direction sidepiece is with the inclined first embodiment of first surface angled manner,
Fluid around balance weight 170 more smoothly and successfully can flow through balance weight 170
Both sides, so as to the resistance of motion (fluid resistance) suffered by rotational structure is less.
The balance according to third embodiment of the invention is described referring to Fig. 7 A, Fig. 7 B and Fig. 8
(Fig. 7 A are to illustrate the formula balance weight symmetrical above and below according to third embodiment of the invention to block 170C
Stereogram, Fig. 7 B are to illustrate the formula balance weight non-symmetrical above and below according to third embodiment of the invention
Stereogram, and Fig. 8 be illustrate according to the balance weight of third embodiment of the invention be attached to drive
The stereogram of the state of axle).
Balance weight 170C is adapted for attachment to drive shaft 134.For example, balance weight 170C can be attached
To the upper part on the upside of rotor 138 of drive shaft 134, it is also possible to be attached to drive shaft 134
The lower part on the downside of rotor 138.
Balance weight 170C can include attachment 172C and counterweight part 174C.
Attachment 172C can in it is generally fan-shaped, and be provided with fastener hole 171C (for example, such as
Circle-shaped fastening holes shown in Fig. 7 A and D-shaped fastener hole as shown in Figure 7 B).Fastener hole 171C
The corresponding part (such as by interference fit) of drive shaft 134 is adapted for attachment to thus by balance weight
170C is securely attached to drive shaft 134.
Counterweight part 174C can be included from the upper surface of attachment 172C (corresponding to the first axial table
Face) axially upwardly extending upper counterweight part 1741C (corresponding to the first counterweight part) and from attachment
The lower counterweight part that the lower surface (corresponding to the second axial surface) of portion 172C is axially extended downwardly
1742C (corresponds to the second counterweight part).Upper counterweight part 1741C and lower counterweight part 1742C can be with
Along attachment 172C fan-shaped edge (that is, centered on the hole heart of fastener hole 171C
Arc edge) extend circumferentially over upon.In the example shown in the series of figures, the fan-shaped edge of attachment 172C and/
Or counterweight part 174C extends substantially 180 degree in circumferential direction.However, it is possible to conceive attachment
The suitable circumferentially extending scope of other of the fan-shaped edge and/or counterweight part 174C of 172C.
Lower counterweight part 1742C can include the direction of rotation RD (correspondences with regard to balance weight 170C
In the direction of rotation of drive shaft 134) leading section 175C and tail end 177C.Leading section 175C
Can be with the leading section 175 in first embodiment and tail end with the configuration of tail end 177C
177 configuration is identical, thus will not be described here.
In formula balance weight 170C symmetrical above and below as shown in Figure 7 A, lower counterweight part 1742C with
Upper counterweight part 1741C can have identical or essentially identical configuration so that balance weight 170C is closed
It is symmetrical above and below in attachment 172C.
In formula balance weight 170C non-symmetrical above and below as shown in Figure 7 B, lower counterweight part 1742C
Be configured so that leading section 175C and tail end 177C with towards respective end it is tapered (or receive
Hold together) tapered shape, and upper counterweight part 1741C is configured so that leading section 175C and tail end
177C extend along radially inner and outer sidepiece benchmark circular arc line IA, OA of counterweight part 174C (or,
But it is configured so that also tapered degree in tapered shape is held for leading section 175C and tail end 177C
Portion's angle is different from lower counterweight part 1742C), thus balance weight 170C is with regard in attachment 172C
Under it is asymmetric.It is configured so that leading section 175C and tail end 177C in upper counterweight part 1741C
Along counterweight part 174C radially inner and outer sidepiece benchmark circular arc line IA, OA extend in the case of,
Can do simply in the end 1773C of the end 1753C of leading section 175C and tail end 177C
Rounding process (it is not apered to tapered shape --- for example do not form end angle or institute's shape
Into end angle be little acute angle).
Alternatively, non-formula balance weight 170C symmetrical above and below can be configured to：Upper counterweight part 1741C
Leading section 175C and tail end 177C with towards respective end tapered (or draw in) gradually
The leading section 175C and tail end 177C of contracting shape and lower counterweight part 1742C does not have tapered
Shape.
According to the balance weight 170C of the 3rd embodiment can bring with according to first embodiment
The essentially identical Advantageous Effects of Advantageous Effects that balance weight 170 can bring.
Balance weight of the invention can allow various different modifications.
For first embodiment, except radially inner side portion 1751 is inclined radially outward towards end
Outside, radially outer side portions 1752 can also be configured to towards end incline radially inward (such as
Shown in Fig. 9 --- Fig. 9 is the modified example for illustrating the balance weight according to first embodiment of the invention
Stereogram).Furthermore it is also possible to conceive, radially inner side portion 1751 does not incline and only radial outside
Portion 1752 is inclined radially inward towards end.Here, it is also pointed out that, the 3rd embodiment party
Formula can also similarly have these replacement schemes.The alternative of the Double-sided inclination of the 3rd embodiment
Case illustrates that (Figure 11 A and Figure 11 B is to be shown respectively according to the present invention in Figure 11 A and Figure 11 B
The stereogram and plan of the modified example of the balance weight of the 3rd embodiment).
For first embodiment：Radially inner side portion 1751 can be inclined radially outward towards end,
And additionally or alternatively, radially inner side portion 1751 can be towards 1754 footpath of axial end surface
To ground it is outward-dipping (that is, radially inner side portion 1751 towards axial end surface 1754 it is tapered and not
It is in flat in the axial direction to be；And this surface angled manner is：Axially and radially incline
But tiltedly circumferential not inclined surface angled manner and hereinafter it is properly termed as " inclining on the 3rd surface
Oblique mode ")；And/or, radially outer side portions 1752 can be inclined radially inward towards end,
And additionally or alternatively, radially outer side portions 1752 can be towards 1754 footpath of axial end surface
Slope inwardly (tapered towards axial end surface 1754) to ground.And, it is also pointed out that, the
Three embodiments can also similarly have these replacement schemes.
For second embodiment, except axial end surface 1754 inclines axially and circumferentially (the
Two surface angled manners) outside, can be with：By radially inner side portion 1751 and/or radially outer side portions
1752 be configured to incline with the 3rd surface angled manner (as shown in Figure 10 --- Figure 10 is to illustrate root
According to the stereogram of the modified example of the balance weight of second embodiment of the invention)；And/or, by footpath
It is configured to incline with first surface angled manner to inside portion 1751 and/or radially outer side portions 1752.
First embodiment and the 3rd embodiment can be combined with second embodiment respectively, example
Such as, the axial end surface according to first embodiment and the 3rd embodiment can additionally be made
1754th, 1774 inclined with second surface angled manner.
In a word, according to the present invention, for leading section and/or tail end are (i.e. in leading section and tail end
One of or both) radially inner side portion, radially outer side portions, axially up and down in end surfaces at least
One, (i.e. radial direction and peripheral, oblique are not still axially inclined can to adopt first surface angled manner
Tiltedly), second surface angled manner (i.e. axial direction and peripheral, oblique are not still radially inclined) and the 3rd
One or more table in surface angled manner (but axially and radially incline circumferentially do not incline)
Face angled manner, as long as so that leading section and/or tail end (i.e. in leading section and tail end
Person or both) end terminus area reduce and/or be preferably so that leading section and/or tail
End is in the tapered shape towards end (circumferential ends are windward side) tapered (or drawing in).
In addition, balance weight of the invention can also be attached to except rotor 138 and drive shaft 134
Outside other rotation/rotatable parts, for example, balance weight of the invention can be attached to into
The hub portion 156 of the dynamic vortex part 150 of row moving.
In addition, in embodiment as described above, balance weight includes being suitable to attached with rotary part
The attachment for connecing.However, it is possible to conceive, balance weight does not include attachment as described above.
In this case, (Figure 12 is to illustrate according to first embodiment of the invention as shown in figure 12
The stereogram of the modified example of counterweight part), balance weight 170D can be configured to only include being suitable to directly
It is attached to (crescent) counterweight part 174 of the end of rotor 138.And, although not shown,
For shaft-like formula balance weight 170C, it is also possible to omit attachment 172C and by counterweight part 174C structures
Cause to be suitable to directly be attached to drive shaft 134.
In addition, for the 3rd embodiment, it is also possible to only arrange upper counterweight part 1741C and lower counterweight
One of portion 1742C.
In addition, in addition to suitable for screw compressor, balance weight of the invention is also applied for
Other rotary machines (such as rotor compressor) of eccentric stiffener are there is also for example.
In a word, according to the present invention it is possible to including following advantageous scheme.
In balance weight of the invention, the leading section also has front radially inner side portion, front footpath
Outside sidepiece and front axial end surface, the tail end also have tail footpath outside to inside portion, tail footpath
Sidepiece and tail axial end surface.
In balance weight of the invention：The front radially inner side portion is towards the front circumferential ends
Incline radially outward, and/or, the front radially outer side portions is towards the front circumferential ends
Incline radially inward；The tail footpath is inclined to inside portion radially outward towards the tail circumferential ends
Tiltedly, and/or, the tail radially outer side portions is inclined radially inward towards the tail circumferential ends
Tiltedly.
In balance weight of the invention, when in axial direction observing, leading section institute shape
Into leading section angle be 15 degree to 50 degree, and/or, the tail formed by the tail end
End angle is 15 degree to 50 degree.
In balance weight of the invention, the leading section angle is of about 30 degree, and/or,
The tail end angle is of about 30 degree.
In balance weight of the invention：The front radially inner side portion is towards the front axial end table
Face is radially outward-dipping, and/or, the front radially outer side portions is towards the front axial end
Surface inclines radially inward；The tail footpath to inside portion towards the tail axial end surface radially
It is outward-dipping, and/or, the tail radially outer side portions is towards tail axial end surface radial direction
Ground slopes inwardly.
In balance weight of the invention, the front circumferential ends be in arcuation and with the front footpath
Smoothly it is connected to inside portion and the front radially outer side portions, and/or, the circumferential end of the tail
End to inside portion and the tail radially outer side portions is smoothly connected in arcuation and with the tail footpath.
In balance weight of the invention, the balance weight is adapted for attachment to the rotation of rotary machine
Part, the balance weight also include with the counterweight part integratedly or the attachment that formed of split ground, institute
State counterweight part to be suitable to be attached to the rotary part via the attachment.
In balance weight of the invention, the rotary part is the rotor of the rotary machine,
The attachment is in general toroidal and is adapted for attachment to the axial end portion of the rotor.
In balance weight of the invention, the counterweight part from the attachment be attached to institute
The contrary counterweight surface in surface for stating rotor axially extends and is formed as partial circle shape.
In balance weight of the invention, the counterweight part extends about 180 in circumferential direction
Degree.
In balance weight of the invention, the rotary part is the driving of the rotary machine
Axle, the attachment are in generally fan-shaped and are provided with fastener hole, and the fastener hole is adapted for attachment to
The corresponding part of the drive shaft.
In balance weight of the invention, the counterweight part includes the first axle from the attachment
The first counterweight part for axially extending to surface and/or from the attachment and described first axially
The second counterweight part that the second contrary axial surface of surface axially extends.
In balance weight of the invention, sector of first counterweight part along the attachment
Edge extends circumferentially over upon about 180 degree, and/or, second counterweight part is along described attached
The fan-shaped edge of socket part extends circumferentially over upon about 180 degree.
In balance weight of the invention, include first counterweight part and institute in the counterweight part
In the case of stating both second counterweight parts：First counterweight part and the equal direction of second counterweight part
Corresponding circumferential ends are tapered so that the balance weight is symmetrical with regard to the attachment；Or, institute
Only one stated in the first counterweight part and second counterweight part is tapered towards corresponding circumferential ends,
So that the balance weight is asymmetric with regard to the attachment.
In balance weight of the invention, the front axial end surface is towards the front circumferential ends
Axially and circumferentially incline, and/or, the tail axial end surface is towards the tail circumference
End inclines axially and circumferentially.
In balance weight of the invention：The front radially inner side portion is towards the front axial end table
Face is radially outward-dipping, and/or, the front radially outer side portions is towards the front axial end
Surface inclines radially inward；The tail footpath to inside portion towards the tail axial end surface radially
It is outward-dipping, and/or, the tail radially outer side portions is towards tail axial end surface radial direction
Ground slopes inwardly.
In balance weight of the invention, when radially observing, leading section institute shape
Into leading section angle be 30 degree to 60 degree, and/or, the tail formed by the tail end
End angle is 30 degree to 60 degree.
In balance weight of the invention, the balance weight is adapted for attachment to the rotation of rotary machine
Rotation member, the balance weight also include with the counterweight part integratedly or the attachment that formed of split ground,
The attachment is suitable to for the counterweight part to be attached to the rotary part, and the front circumferential end
End through smoothing processing cause the axial end surface at the front circumferential ends with the attachment
Smoothly it is connected, and/or, the tail circumferential ends cause the axial end through smoothing processing
Surface is smoothly connected with the attachment at the tail circumferential ends.
In rotary machine of the invention, the rotary machine be screw compressor, institute
Stating screw compressor includes the rotor as the rotary part and drive shaft.
In present specification, the use of directional terminology " top ", "up" and "down" etc. only goes out
In the purpose for being easy to describe, and it is not construed as restricted.
Although with reference to illustrative embodiments, invention has been described, but it is to be understood that
The specific embodiment for describing in detail in the invention is not limited in text and illustrating, is wanting without departing from right
In the case of seeking book limited range, those skilled in the art can be made to illustrative embodiments
Various changes.
Claims (21)
1. a kind of balance weight (170,170B, 170C, 170D), the balance weight include counterweight part
(174,174C), before the counterweight part includes the direction of rotation (RD) with regard to the counterweight part
End (175,175C) and tail end (177,177C), the leading section have front circumferential end
End (1753,1753C), the tail end have tail circumferential ends (1773,1773C),
Wherein, at least one of the leading section and the tail end were configured to towards corresponding week
Terminad is tapered.
2. balance weight (170,170B, 170C, 170D) according to claim 1, wherein,
The leading section (175,175C) also has front radially inner side portion (1751), front radially outer side portions
(1752) and front axial end surface (1754), the tail end (177,177C) also has tail
Radially inner side portion (1771), tail radially outer side portions (1772) and tail axial end surface (1774).
3. balance weight (170,170C, 170D) according to claim 2, wherein：
The front radially inner side portion (1751) is towards the front circumferential ends (1753,1753C)
Incline radially outward, and/or, the front radially outer side portions (1752) is towards before described
Circumferential ends (1753,1753C) are inclined radially inward,
The tail footpath is to inside portion (1771) towards the tail circumferential ends (1773,1773C)
Incline radially outward, and/or, the tail radially outer side portions (1772) is towards the tail
Circumferential ends (1753,1753C) are inclined radially inward.
4. balance weight (170,170C, 170D) according to claim 3, wherein, work as edge
When axial direction is observed, the leading section angle (α) formed by the leading section (175,175C)
For 15 degree to 50 degree, and/or, the tail end formed by the tail end (177,177C)
Portion's angle (β) is 15 degree to 50 degree.
5. balance weight (170,170C, 170D) according to claim 4, wherein, it is described
Leading section angle (α) is of about 30 degree, and/or, the tail end angle (β) is
About 30 degree.
6. balance weight (170,170C, 170D) according to claim 3, wherein：
The front radially inner side portion (1751) towards the front axial end surface (1754) radially
It is outward-dipping, and/or, the front radially outer side portions (1752) is towards the front axial end
Surface (1754) inclines radially inward,
The tail footpath to inside portion (1771) towards the tail axial end surface (1774) radially
It is outward-dipping, and/or, the tail radially outer side portions (1772) is towards the tail axial end
Surface (1774) inclines radially inward.
7. balance weight (170,170C, 170D) according to claim 3, wherein, it is described
Front circumferential ends (1753,1753C) in arcuation and with the front radially inner side portion (1751)
Smoothly it is connected with the front radially outer side portions (1752), and/or, the circumferential end of the tail
End (1773,1773C) is in arcuation and with the tail footpath to inside portion (1771) and the tail
Radially outer side portions (1772) is smoothly connected.
8. balance weight (170,170B, 170C) according to any one of claim 1 to 7,
Wherein, the balance weight be adapted for attachment to rotary machine (100) rotary part (134,138),
The balance weight also include with the counterweight part (174,174C) integratedly or split ground formed it is attached
Socket part (172,172C), the counterweight part (174,174C) be suitable to via the attachment (172,
172C) be attached to the rotary part (134,138).
9. balance weight (170,170B) according to claim 8, wherein, the rotary part
(138) be the rotary machine (100) rotor (138), the attachment (172) is in
General toroidal and it is adapted for attachment to the axial end portion (138a, 138b) of the rotor (138).
10. balance weight (170,170B) according to claim 9, wherein, the counterweight part
(174) from the contrary with the surface for being attached to the rotor (138) of the attachment (172)
Counterweight surface (137) axially extends and is formed as partial circle shape.
11. balance weights (170,170B) according to claim 10, wherein, the counterweight
Portion (174) extends about 180 degree in circumferential direction.
12. balance weights (170C) according to claim 8, wherein, the rotary part (134)
It is the drive shaft (134) of the rotary machine (100), the attachment (172C) is in substantially
Fan-shaped and be provided with fastener hole (171C), the fastener hole (171C) is adapted for attachment to described
The corresponding part of drive shaft (134).
13. balance weights (170C) according to claim 12, wherein, the counterweight part (174C)
Including the first counterweight part that the first axial surface from the attachment (172C) axially extends
(1741C) and/or from contrary with first axial surface of the attachment (172C)
The second counterweight part (1742C) that two axial surfaces axially extend.
14. balance weights (170C) according to claim 13, wherein, first counterweight part
(1741C) the fan-shaped edge along the attachment (172C) extends circumferentially over upon about 180 degree,
And/or, sector of second counterweight part (1742C) along the attachment (172C)
Edge extends circumferentially over upon about 180 degree.
15. balance weights (170C) according to claim 13, wherein, in the counterweight part
(174C) including first counterweight part (1741C) and second counterweight part (1742C)
In the case of both：First counterweight part (1741C) and second counterweight part (1742C)
It is tapered towards corresponding circumferential ends so that the balance weight (170C) is with regard to the attachment
(172C) it is symmetrical；Or, first counterweight part (1741C) and second counterweight part
(1742C) only one in is tapered towards corresponding circumferential ends so that the balance weight
(170C) it is asymmetric with regard to the attachment (172C).
16. balance weights (170,170B, 170C, 170D) according to Claims 2 or 3,
Wherein, the front axial end surface (1754) is towards the front circumferential ends (1753,1753C)
Axially and circumferentially incline, and/or, the tail axial end surface (1774) is towards institute
State tail circumferential ends (1773,1773C) axially and circumferentially incline.
17. balance weights (170,170B, 170C, 170D) according to claim 16, its
In：
The front radially inner side portion (1751) towards the front axial end surface (1754) radially
It is outward-dipping, and/or, the front radially outer side portions (1752) is towards the front axial end
Surface (1754) inclines radially inward,
The tail footpath to inside portion (1771) towards the tail axial end surface (1774) radially
It is outward-dipping, and/or, the tail radially outer side portions (1772) is towards the tail axial end
Surface (1774) inclines radially inward.
18. balance weights (170,170B, 170C, 170D) according to claim 16, its
In, when radially observing, the leading section angle (γ) formed by the leading section (175)
For 30 degree to 60 degree, and/or, the tail end angle formed by the tail end (177)
(δ) it is 30 degree to 60 degree.
19. balance weights (170,170B, 170C) according to claim 16, wherein：
The balance weight be adapted for attachment to rotary machine (100) rotary part (134,138),
The balance weight also include with the counterweight part (174,174C) integratedly or split ground formed it is attached
Socket part (172,172C), the attachment are suitable to for the counterweight part to be attached to the rotary part,
And
The front circumferential ends (1753,1753C) cause the axial end table through smoothing processing
Face (1754) is smoothly connected with the attachment at the front circumferential ends, and/or,
The tail circumferential ends (1773,1773C) cause the axial end surface through smoothing processing
(1774) smoothly it is connected with the attachment at the tail circumferential ends.
A kind of 20. rotary machines (100), wherein, the rotary machine (100) is included such as power
Profit requires the balance weight (170,170B, 170C, 170D) any one of 1 to 19.
21. rotary machines (100) according to claim 20, wherein, the rotary machine
Tool (100) is screw compressor (100), and the screw compressor (100) is included as the rotation
The rotor (138) and drive shaft (134) of rotation member.
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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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN106555755B (en) | 2019-11-08 |
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