CN110096717A - The chassis design method of compressor in refrigerating plant - Google Patents
The chassis design method of compressor in refrigerating plant Download PDFInfo
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- CN110096717A CN110096717A CN201810084002.1A CN201810084002A CN110096717A CN 110096717 A CN110096717 A CN 110096717A CN 201810084002 A CN201810084002 A CN 201810084002A CN 110096717 A CN110096717 A CN 110096717A
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- 238000013461 design Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000005284 excitation Effects 0.000 claims abstract description 26
- 238000001228 spectrum Methods 0.000 claims description 9
- 238000004088 simulation Methods 0.000 claims description 8
- 238000002474 experimental method Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 238000012795 verification Methods 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000010977 unit operation Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 11
- 230000006835 compression Effects 0.000 abstract description 9
- 238000007906 compression Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 238000012356 Product development Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/10—Noise analysis or noise optimisation
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Geometry (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Evolutionary Computation (AREA)
- Computer Hardware Design (AREA)
- Computational Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Compressor (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The present invention provides a kind of chassis design method of compressor in refrigerating plant, the shell of refrigerating plant is fixed on chassis, and compressor is fixed on chassis.When design method comprises steps of determining that compressor operation, to the maximum vibration excitation orientation of its vibrational system constituted with chassis；To the vibrational excitation frequency of vibrational system when test compression machine is run；The resonant frequency section of vibrational system is calculated according to vibrational excitation frequency；The structure on chassis is designed and optimized, so that the modal frequency of vibrational system avoids resonant frequency section, and vibrational system peak swing direction is made to avoid maximum vibration excitation orientation.Design method of the invention can conveniently design the scheme for greatly reducing refrigerating plant noise and precision is high, and the design cycle is short.
Description
Technical field
The present invention relates to refrigerating field, in particular to the chassis design method of compressor in a kind of refrigerating plant.
Background technique
The noise of the refrigerating plants such as air-conditioning, Teat pump boiler is to cause one of main problem of customer complaint.Compressor is
The main vibration of refrigerating plant and noise source.For vibration and the noise for reducing compressor, existing structure is usually in compressor
Footing installs rubber mat, or reduces the outside propagation of noise using vibration insulation structure.
But above-mentioned design method often up to thinks effect to be achieved less than designer, refrigerating plant still has larger make an uproar
Sound.Moreover, above-mentioned design method needs to carry out many experiments to verify result of design, the design cycle is long, and product development cost is high.
Summary of the invention
The invention aims to overcome the drawbacks described above of the prior art, compressor chassis in a kind of refrigerating plant is provided
Design method, can conveniently design the scheme for greatly reducing refrigerating plant noise.
Further object of the present invention is design accuracy to be improved, and shortens the design cycle, reduces product development cost.
Particularly, the present invention provides a kind of chassis design method of compressor in refrigerating plant, wherein chassis is fixed on
The shell of refrigerating plant, compressor are fixed on the upside of chassis, design method the following steps are included:
Step A: when determining compressor operation, to the maximum vibration excitation orientation of its vibrational system constituted with chassis；
Step B: to the vibrational excitation frequency of vibrational system when test compression machine is run；
Step C: the resonant frequency section of vibrational system is calculated according to vibrational excitation frequency；
Step D: designing and optimizes the structure on chassis, so that the modal frequency of vibrational system avoids resonant frequency section, and
The peak swing direction of vibrational system is set to avoid maximum vibration excitation orientation.
Optionally, if it is vertical compressor that step A, which includes: compressor, using horizontal direction as maximum vibration excitation orientation；
If compressor is horizontal compressor, using vertical direction as maximum vibration excitation orientation.
Optionally, step B includes: the single-unit operation noise of test compression machine, obtains noise spectrum, with single order therein vibration
Dynamic frequency is as vibrational excitation frequency.
Optionally, step C includes: to the driving frequency of vibrational system when setting compressor operation as ω, then resonant frequency area
Between be (0.75 ω, 1.25 ω).
Optionally, step D includes: step D1: carrying out structure design to chassis；Step D2: by the design structure on chassis, benefit
The modal frequency of vibrational system is calculated with finite element emulation software, and obtains Mode Shape to determine peak swing direction；Step
D3: judge whether to meet following design object: modal frequency avoids resonant frequency section and peak swing direction and avoids maximum vibration
Dynamic excitation orientation；If so, the structure of shaping chassis designs；If it is not, improve chassis structure design after, repeat step D2 and
D3, until meeting design object.
Optionally, after step D2 further include: step D21: the vibration being made up of noise experiment test compression machine and chassis
The noise of dynamic system, obtains noise spectrum, with the simulation result in verification step D2.
Optionally, in step D3, the step of improving the structural design scheme on chassis includes: the reinforcing rib changed on chassis
Shape, size, position and/or quantity.
Optionally, in step D3, the step of improving the structural design scheme on chassis includes: the fixation for changing chassis and shell
Mode.
Compressor chassis design method of the invention gets down to the improvement on compressor chassis, by the structure for optimizing chassis
The rigidity for the vibrational system that (connection type including chassis and shell) Lai Zengjia compressor and chassis are constituted, makes whole system
Intrinsic frequency shifts, and the direction of the vibration shape and amplitude change, to realize the control of resonant frequency and the vibration shape, improves vibration
The kinetic characteristics of dynamic system, reduce the noise of refrigerating plant.
Further, the vibration that design method of the invention calculates compressor using finite element emulation software and chassis is constituted
The modal frequency and Mode Shape of system, it is convenient and efficient, design accuracy is improved, the design cycle is shortened, eliminates many realities
Verification process is tested, reduce product is split into this.
According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter
The above and other objects, advantages and features of the present invention.
Detailed description of the invention
Some specific embodiments of the present invention is described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter.
Identical appended drawing reference denotes same or similar part or part in attached drawing.It should be appreciated by those skilled in the art that these
What attached drawing was not necessarily drawn to scale.In attached drawing:
Fig. 1 is the schematic diagram of the chassis design method of compressor in refrigerating plant of the invention；
Fig. 2 is the flow chart of the chassis design method of one embodiment of the invention；
Fig. 3 is the connected mode schematic diagram on vertical compressor and chassis；
Fig. 4 is the connected mode schematic diagram on horizontal compressor and chassis；
Fig. 5 is the initial configuration design scheme schematic side elevation of chassis structure；
Fig. 6 is the bottom substance schematic diagram of chassis structure shown in Fig. 5；
Fig. 7 is improved chassis structure schematic diagram；
Fig. 8 is the single machine noise pattern of compressor；
Fig. 9 is that chassis structure improves front and back, the noise spectrum comparison diagram of refrigerating plant complete machine.
Specific embodiment
The embodiment of the invention provides a kind of chassis design methods of compressor in refrigerating plant.For using compressor
Refrigerating plant, such as air-conditioning, Teat pump boiler, refrigerator, the vibration of complete machine and noise are mainly derived from the operating of compressor.When
Before, those skilled in the art are the noise reduction for realizing refrigerating plant, are mainly focused on both direction, and one is the knot for improving compressor
Structure, two be to stop noise to be propagated outward using vibration isolation material.
It improves compressor arrangement or stops noise transmission that can play good effect, but there are still many limitations, partially make an uproar
Sound is difficult to eliminate and stop.The R&D direction that this field is badly in need of more updating is to cope with noise and vibration problem.
Fig. 3 and Fig. 4 illustrates two kinds of common mounting means of compressor in existing refrigerating plant.Such as Fig. 3 and Fig. 4 institute
Show, a chassis 200 is usually provided in the shell of refrigerating plant, and the bottom of compressor 100 is provided with stabilizer blade 110, and stabilizer blade 110 is used
It is connected in chassis 200, rubber mat 300 is provided between stabilizer blade 110 and chassis 200, plays damping effect.
It was found by the inventors of the present invention that vibrating the resonance generated when compressor is run and Low Medium Frequency noise being difficult to stop.
And the vibration system being made up of structure (connection type including chassis and shell) the Lai Zengjia compressor and chassis on optimization chassis
The rigidity of system makes the intrinsic frequency of whole system shift, and so that the direction of the vibration shape and amplitude is changed to realize resonance frequency
The control of rate and the vibration shape improves the kinetic characteristics of vibrational system, can be substantially reduced the noise of refrigerating plant.
For this purpose, the embodiment of the invention provides a kind of chassis design methods of compressor in refrigerating plant.As shown in Figure 1,
The design method of the embodiment of the present invention generally may include following steps.
Step A: when determining compressor operation, the vibrational system (hereinafter referred to as vibrational system) constituted to it with chassis is most
Big vibrational excitation direction；
Step B: to the vibrational excitation frequency of vibrational system when test compression machine is run；
Step C: the resonant frequency section of vibrational system is calculated according to vibrational excitation frequency；
Step D: designing and optimizes the structure on chassis, so that the modal frequency of vibrational system avoids resonant frequency section, and
Vibrational system peak swing direction is set to avoid maximum vibration excitation orientation.
In above each step, in step A: after the completion of compressor is fixedly connected with chassis, the two constitutes a vibration system
System.Vibration will be generated when compressor is run, and vibration is passed into chassis, and chassis is driven to vibrate jointly.
In refrigerating plant, compressor can be horizontal compressor, as shown in Figure 3.The rotor of horizontal compressor and its
The pivot center of interior rotatable parts is horizontally extending (being parallel to Z axis), and the direction of vibration of compressor 100 is mainly
Radial direction, i.e. X to and Y-direction.Because Y-direction vibration is perpendicular to chassis 200, transmission area is much larger than other both directions.Carry out
When the dynamics Design on compressor chassis, emphasis is answered to consider the vibration shape of Y-direction.Therefore, in the embodiment of the present invention, according to Horizontal type pressure
Contracting machine, using vertical direction as maximum vibration excitation orientation above-mentioned.
Certainly, compressor can also be vertical compressor, as shown in Figure 4.The rotor of vertical compressor and its in
The pivot center of rotatable parts extends (being parallel to Z axis) along the vertical direction, and the direction of vibration of compressor 100 is mainly radial
Direction, i.e. X to and Y-direction.In the vehicle dynamics design for carrying out compressor, emphasis is answered to consider X to the vibration shape with Y-direction.Therefore,
In the embodiment of the present invention, according to vertical compressor, using horizontal direction as maximum vibration excitation orientation above-mentioned.
In stepb, compressor single machine test refers to only independent test compression machine rather than refrigerating plant.Fig. 8 signal
Be certain compressor single machine noise spectrum, in the noise spectrum of Fig. 8, the single order vibration frequency i.e. vibrational excitation of the compressor
Frequency is about 47Hz.
In step C, resonant frequency section refers to the section that the modal frequency of vibrational system needs to avoid, the section and pressure
The vibrational excitation frequency of contracting machine is related.It is learnt according to inventor's experiment, if compressor is run, to the driving frequency of vibrational system
For ω, then the resonant frequency section that the vibrational system that compressor and chassis are constituted should be avoided is (0.75 ω, 1.25 ω).
In step D, initial designs can be carried out to chassis structure first according to passing design experiences.Then chassis is calculated
With compression mechanism at vibrational system modal frequency and Mode Shape, peak swing direction is determined according to Mode Shape.Finally
The design object needed is: guaranteeing that the modal frequency of vibrational system is avoided and (not fallen in) in resonant frequency above-mentioned section, and makes
Avoid maximum vibration excitation orientation in peak swing direction.If being unsatisfactory for the above design object, need to change chassis structure
Into until meeting.Specifically, the assembling model that chassis and compressor can be drawn by 3 d modeling software, by threedimensional model
Dynamics finite element emulation software is imported, simulation software is recycled to calculate the modal frequency and Mode Shape of vibrational system.
It specifically, include shape, size, position and/or the number for changing the reinforcing rib on chassis to the improvement of chassis structure
Amount.For example, Fig. 5, Fig. 6 are the chassis structure of inventor's initial designs, Fig. 7 is the chassis after simulation calculation, after optimization design
Structure.Compared to Fig. 5, the structure of reinforcing rib is changed.
In some embodiments, the chassis that structure improves front and back can be respectively arranged in refrigerating plant, and made an uproar respectively
Sound test, as a result as shown in Figure 9.What dotted portion indicated in Fig. 9 is the noise result obtained using the chassis of initial designs, real
What now part indicated is the noise result obtained using the chassis after structure optimization.As seen from the figure, after being optimized to chassis, system
Device for cooling total noise of centrifuge is substantially reduced, and noise reduction effect is obvious.
Certainly, it can also get down to change its global shape, its fixed form with shell (with shell to the improvement of chassis structure
The intensity of distribution or the threaded connection of body tie point) etc..
Certainly, in above-mentioned design process, when in the modal frequency and mode for calculating vibrational system using simulation software
After the vibration shape, the noise for the vibrational system that can be also constituted according to the noise experiment of actual product come test compression machine and chassis is obtained
Noise spectrum obtains modal frequency by noise spectrum, verifies the authenticity of simulation result.When simulation result is genuine and believable,
Chassis can be optimized by its result.When result test result differs larger with simulation result, it should search and solve
Problem causes to mislead to avoid the biggish simulation result of error to design.
Fig. 2 illustrates the flow chart of the design method of currently preferred one embodiment.As shown in Fig. 2, of the invention
The design method of one preferred embodiment is perform the following steps in sequence:
Step A: when determining compressor operation, to the maximum vibration excitation orientation of its vibrational system constituted with chassis；
Step B: to the vibrational excitation frequency of vibrational system when test compression machine is run.
Step C: the resonant frequency section of vibrational system is calculated according to vibrational excitation frequency.
Step D1: structure design is carried out to chassis.
Step D2: by the design structure on chassis, the modal frequency of vibrational system is calculated using finite element emulation software, and is obtained
To Mode Shape to determine peak swing direction；
Step D21: by the noise for the vibrational system that noise experiment is constituted come test compression machine and chassis, noise frequency is obtained
Spectrum, with the simulation result in verification step D2.
Step D3: judge whether to meet following design object: modal frequency avoids resonant frequency section and peak swing side
To avoiding maximum vibration excitation orientation.If so, executing step D31；If it is not, executing step D32.
Step D31: the structure design of shaping chassis.
Step D32: the structure design on chassis is improved, re-execute the steps D2 later, until meeting the design object in D3
Until.
In the embodiment of the present invention, the mode of the vibrational system of compressor and chassis composition is calculated using finite element emulation software
Frequency and Mode Shape, it is convenient and efficient, design accuracy is improved, the design cycle is shortened, eliminates many experimental verification processes,
Reduce product is split into this.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows
Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or deduce out many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all such other variations or modifications.
Claims (8)
1. the shell of refrigerating plant, the pressure are fixed in a kind of chassis design method of compressor in refrigerating plant, the chassis
Contracting machine is fixed on the upside of the chassis, the design method the following steps are included:
Step A: when determining compressor operation, to the maximum vibration excitation side of its vibrational system constituted with the chassis
To；
Step B: the vibrational excitation frequency when compressor is run to the vibrational system is tested；
Step C: the resonant frequency section of the vibrational system is calculated according to the vibrational excitation frequency；
Step D: designing and optimizes the structure on the chassis, so that the modal frequency of the vibrational system avoids the resonant frequency
Section, and the peak swing direction of the vibrational system is made to avoid the maximum vibration excitation orientation.
2. design method according to claim 1, wherein step A includes:
If the compressor is vertical compressor, using horizontal direction as the maximum vibration excitation orientation；
If the compressor is horizontal compressor, using vertical direction as the maximum vibration excitation orientation.
3. design method according to claim 1, wherein step B includes:
The single-unit operation noise of the compressor is tested, noise spectrum is obtained, using single order vibration frequency therein as the vibration
Dynamic driving frequency.
4. design method according to claim 1, wherein step C includes:
If being ω to the driving frequency of the vibrational system when compressor is run, then the resonant frequency section is (0.75
ω, 1.25 ω).
5. design method according to claim 1, wherein step D includes:
Step D1: structure design is carried out to the chassis；
Step D2: by the design structure on the chassis, the modal frequency of the vibrational system is calculated using finite element emulation software,
And Mode Shape is obtained with the determination peak swing direction；
Step D3: judge whether to meet following design object: the modal frequency avoid the resonant frequency section and it is described most
Avoid the maximum vibration excitation orientation in large amplitude direction；
If so, the structure on the chassis of being formed designs；
If it is not, step D2 and D3 are repeated after the structure for improving the chassis designs, until meeting the design object.
6. design method according to claim 5, wherein after step D2 further include:
Step D21: the noise of the vibrational system of the compressor and chassis composition is tested by noise experiment, is obtained
Noise spectrum, with the simulation result in verification step D2.
7. design method according to claim 5, wherein in step D3, the step of improving the structure design on the chassis packet
It includes:
Change shape, size, position and/or the quantity of the reinforcing rib on the chassis.
8. design method according to claim 5, wherein in step D3, the step of improving the structure design on the chassis packet
It includes:
Change the fixed form on the chassis Yu the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810084002.1A CN110096717B (en) | 2018-01-29 | 2018-01-29 | Method for designing chassis of compressor in refrigerating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810084002.1A CN110096717B (en) | 2018-01-29 | 2018-01-29 | Method for designing chassis of compressor in refrigerating device |
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| Publication Number | Publication Date |
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| CN110096717A true CN110096717A (en) | 2019-08-06 |
| CN110096717B CN110096717B (en) | 2023-09-26 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001263235A (en) * | 2000-03-15 | 2001-09-26 | Mitsubishi Electric Corp | Support structure of compressor and refrigerator and air conditioner and dehumidifier |
| CN205977601U (en) * | 2016-07-20 | 2017-02-22 | 安徽美芝制冷设备有限公司 | A compressor that is used for base of compressor and has it |
| CN106529048A (en) * | 2016-11-11 | 2017-03-22 | 四川长虹空调有限公司 | Pipe vibration simulation method for air conditioner compressor |
| CN206221280U (en) * | 2016-10-20 | 2017-06-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Screw compressor and its acoustic absorptive member |
| CN206889566U (en) * | 2017-06-20 | 2018-01-16 | 武汉康格瑞环保科技有限公司 | A kind of damping skid for gas compressor set |
-
2018
- 2018-01-29 CN CN201810084002.1A patent/CN110096717B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001263235A (en) * | 2000-03-15 | 2001-09-26 | Mitsubishi Electric Corp | Support structure of compressor and refrigerator and air conditioner and dehumidifier |
| CN205977601U (en) * | 2016-07-20 | 2017-02-22 | 安徽美芝制冷设备有限公司 | A compressor that is used for base of compressor and has it |
| CN206221280U (en) * | 2016-10-20 | 2017-06-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Screw compressor and its acoustic absorptive member |
| CN106529048A (en) * | 2016-11-11 | 2017-03-22 | 四川长虹空调有限公司 | Pipe vibration simulation method for air conditioner compressor |
| CN206889566U (en) * | 2017-06-20 | 2018-01-16 | 武汉康格瑞环保科技有限公司 | A kind of damping skid for gas compressor set |
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