CN108131285A - A kind of system and method for testing screw compressor work indicator card - Google Patents
A kind of system and method for testing screw compressor work indicator card Download PDFInfo
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- CN108131285A CN108131285A CN201711431708.2A CN201711431708A CN108131285A CN 108131285 A CN108131285 A CN 108131285A CN 201711431708 A CN201711431708 A CN 201711431708A CN 108131285 A CN108131285 A CN 108131285A
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- screw compressor
- pressure
- pressure sensor
- bent axle
- close
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The present invention disclose a kind of screw compressor of testing and works the system and method for indicator card, including power supply, input module, computer, screw compressor fixed scroll upper edge fixed scroll several spaced pressure sensors of vortex line and be arranged in screw compressor close to switch；Within a work period of screw compressor, always there is the pressure that at least one pressure sensor can measure scroll compressor compresses intracavitary；Close to the detection faces switched towards bent axle, bent axle, which often rotates a circle, can trigger primary close switch；Each pressure sensor and close switch are electrically connected respectively with power supply, input module, and input module is electrically connected with computer, and the software can acquire, filter, displaying and saving pressure sensor and the signal close to switch is provided in computer.The system and method for present invention test screw compressor work indicator card is simple in structure, precision is high, convenient and practical.
Description
Technical field
The present invention relates to compressor pressure technical field of measurement and test, show work(more particularly to a kind of test screw compressor work
The system and method for figure.
Background technology
Screw compressor is widely used and refrigeration system, and the performance for accurately and rapidly testing screw compressor has
Great meaning.The method of test screw compressor efficiency is mostly to release screw compressor by the way that the performance of refrigeration system is counter at present
Performance, this test method is there are larger transmission error, and measurement data is only the macro-data of compressor, can not be right
Compressor performance, which is made, subtly to be analyzed.With the raising that people require efficiency, there is an urgent need for being capable of quick, accurate test compression machine
The tool of efficiency, and p-V figures are the powerfuls that can directly reflect compressor efficiency, existing p-V figures test method, often
It is complicated, and can not realize that pressure is corresponded with crank angle.
Invention content
It is above-mentioned to solve the object of the present invention is to provide a kind of system and method for testing screw compressor work indicator card
Problem of the existing technology quickly, accurately, conveniently, completely tests out the indicator card of screw compressor whole work process,
For the microcosmic mechanism Journal of Sex Research of screw compressor.
To achieve the above object, the present invention provides following schemes：The present invention provides a kind of test screw compressor work
The system of indicator card includes the vortex of fixed scroll described in power supply, input module, computer, the fixed scroll upper edge in screw compressor
Several spaced pressure sensors of line and be arranged in screw compressor close to switch；The one of screw compressor
In a work period, always there is the pressure that at least one pressure sensor can measure scroll compressor compresses intracavitary；It is described
Close to the detection faces switched towards bent axle, bent axle, which often rotates a circle, can trigger the primary close switch；Each pressure
Sensor and the close switch are electrically connected respectively with the power supply, the input module, the input module and the computer
It is electrically connected, being provided in the computer can acquire, filter, displaying and saving the pressure sensor and the close switch
Signal software.
Preferably, the fixed scroll corresponds to each pressure sensor and is both provided with threaded hole, the pressure sensor
It is threadedly coupled with the fixed scroll.
Preferably, the pressure sensor is four.
Preferably, the input module is electrically connected with the computer by USB connecting lines.
The present invention also provides a kind of test scroll compressions of the system based on above-mentioned test screw compressor work indicator card
The method of machine work indicator card：
(1) screw compressor is opened, and screw compressor is made at least to run a work period, computer acquisition, filter
Wave, display simultaneously preserve each pressure sensor measures in screw compressor operational process pressure data and stopping close to switch
Point signal；
(2) rotation angle of bent axle is calculated according to the initial position of bent axle and close to the endstop signal of switch, and
According to the fixed angle that described one work period bent axle of screw compressor is rotated, one work week of screw compressor is chosen
The pressure data that each pressure sensor in phase measures obtains pressure data and bent axle that each pressure sensor measures
The correspondence figure of rotation angle；
(3) the two of the same crankshaft rotation angle pressure datas measured to two neighboring pressure sensor, are chosen,
Selection principle is to choose the small pressure data of relative fluctuation, obtains the compression chamber number pressure in one work period of screw compressor
According to；
(4) bent axle is calculated according to the correspondence of the volume of the compression chamber of screw compressor and the rotation angle of bent axle
The volume of screw compressor during different rotary angle, and draw change curve of the screw compressor volume with crankshaft rotation angle；
(5) according to the pressure data that measures of each pressure sensor and pair of crankshaft rotation angle obtained in step (2)
It is obtained in the compression chamber pressure data in one work period of screw compressor and step (4) that should be related to, are obtained in step (3)
Bent axle different rotary angle when screw compressor in compression chamber volume, draw the work indicator card of screw compressor.
The present invention it is a kind of test screw compressor work indicator card system and method achieve compared with prior art with
Lower technique effect：
The system and method for present invention test screw compressor work indicator card can measure screw compressor work simultaneously
The pressure data of compression chamber and the endstop signal close to switch in the process can obtain each according to the endstop signal close to switch
The rotation angle of bent axle corresponding to pressure data, accuracy are high；Scroll compression can be calculated according to the rotation angle of bent axle
The volume of compression chamber in contracting machine, so as to obtain the work indicator card of screw compressor, system is formed simply, and method is simple, practical.
Description of the drawings
It in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structure diagram of the system of present invention test screw compressor work indicator card；
Fig. 2 is the distribution schematic diagram of pressure sensor in the system of the invention for testing screw compressor work indicator card；
Fig. 3 is each pressure sensor and crankshaft angles in the system of the invention for testing screw compressor work indicator card
Correspondence figure；
Volumes and song of the Fig. 4 for the system mesoscale eddies compressor compresses chamber of present invention test screw compressor work indicator card
The correspondence figure of axis rotation angle；
Wherein, 1- first pressure sensors, 2- second pressure sensors, 3- third pressure sensors, the 4th pressure of 4- pass
Sensor.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
It is existing to solve the object of the present invention is to provide a kind of system and method for testing screw compressor work indicator card
Technology there are the problem of, quickly, accurately, conveniently, completely test out the indicator card of screw compressor whole work process, be used for
The microcosmic mechanism Journal of Sex Research of screw compressor.
The present invention provide it is a kind of test screw compressor work indicator card system, including power supply, input module, computer,
Several spaced pressure sensors of vortex line of fixed scroll described in fixed scroll upper edge in screw compressor and setting
In screw compressor close to switch；Within a work period of screw compressor, always there is at least one pressure to pass
Sensor can measure the pressure of scroll compressor compresses intracavitary；Towards bent axle, bent axle is often rotated the detection faces close to switch
It can trigger within one week primary described close to switch；Each pressure sensor and it is described close to switch respectively with the power supply,
The input module electrical connection, the input module are electrically connected with the computer, and being provided in the computer can acquire, filter
Wave, the software for displaying and saving the pressure sensor and the signal close to switch.
The present invention also provides a kind of test scroll compressions of the system based on above-mentioned test screw compressor work indicator card
The method of machine work indicator card：
(1) screw compressor is opened, and screw compressor is made at least to run a work period, computer acquisition, filter
Wave, display simultaneously preserve each pressure sensor measures in screw compressor operational process pressure data and stopping close to switch
Point signal；
(2) rotation angle of bent axle is calculated according to the initial position of bent axle and close to the endstop signal of switch, and
According to the fixed angle that described one work period bent axle of screw compressor is rotated, one work week of screw compressor is chosen
The pressure data that each pressure sensor in phase measures obtains pressure data and bent axle that each pressure sensor measures
The correspondence figure of rotation angle；
(3) the two of the same crankshaft rotation angle pressure datas measured to two neighboring pressure sensor, are chosen,
Selection principle is to choose the small pressure data of relative fluctuation, obtains the compression chamber number pressure in one work period of screw compressor
According to；
(4) bent axle is calculated according to the correspondence of the volume of the compression chamber of screw compressor and the rotation angle of bent axle
The volume of screw compressor during different rotary angle, and draw change curve of the screw compressor volume with crankshaft rotation angle；
(5) according to the pressure data that measures of each pressure sensor and pair of crankshaft rotation angle obtained in step (2)
It is obtained in the compression chamber pressure data in one work period of screw compressor and step (4) that should be related to, are obtained in step (3)
Bent axle different rotary angle when screw compressor in compression chamber volume, draw the work indicator card of screw compressor.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
As shown in Figure 1, the system of the present embodiment test screw compressor work indicator card includes power supply, input module, electricity
Brain, the fixed scroll upper edge fixed scroll of screw compressor spaced four pressure sensors of vortex line and be arranged on whirlpool
Revolve in compressor close to switch；Close to the detection faces switched towards bent axle, bent axle, which often rotates a circle, can trigger primary approach
Switch；Each pressure sensor and close switch are electrically connected respectively with power supply, input module, and input module uses NI9205, defeated
Enter module to be electrically connected by USB connecting lines with computer, being provided in computer can acquire, filter, displaying and saving pressure sensing
Device and the software close to the signal switched, the software are write under LabVIEW development environments.
In the present embodiment, fixed scroll corresponds to each pressure sensor and is both provided with threaded hole, pressure sensor and quiet whirlpool
Disk is threadedly coupled, and the electric wire of pressure sensor connection is connect across threaded hole with power supply, input module.
The quantity needs of pressure sensor are selected according to the specific length of fixed scroll vortex line, pressure sensor
Quantity cannot then meet very little by the pressure data of any one time point compression chamber in one work period of screw compressor, pressure
The quantity of force snesor crosses the pressure that can at most increase computer data processing, therefore the present embodiment is preferred by the quantity of pressure sensor
It it is four, the distribution of four pressure sensors of the present embodiment is as shown in Figure 2.It should be noted that the arrangement of pressure sensor needs
Meet within a work period of screw compressor, always have at least one pressure sensor that can measure scroll compressor compresses
The pressure of intracavitary, in the present embodiment first pressure sensor 1 can measure the pressure of screw compressor expiratory phase compression chamber
Data, second pressure sensor 2 can measure the pressure data of screw compressor air-breathing and compression stage compression chamber, third pressure
Sensor 3 can measure the pressure data of scroll compressor compresses and exhaust phase compression chamber, and the 4th pressure sensor 4 can be surveyed
Obtain the pressure data of screw compressor exhaust phase compression chamber.
The present invention also provides a kind of test scroll compressions of the system based on above-mentioned test screw compressor work indicator card
The method of machine work indicator card：
(1) screw compressor is opened, and screw compressor is made at least to run a work period, computer acquisition, is shown filtering
Show and preserve each pressure sensor measures in screw compressor operational process pressure data and the stop letter close to switch
Number；
(2) rotation angle of bent axle is calculated according to the initial position of bent axle and close to the endstop signal of switch, and
According to the fixed angle that one work period bent axle of screw compressor is rotated, choose in one work period of screw compressor
The pressure data that measures of each pressure sensor, obtain pressure data and crankshaft rotation angle that each pressure sensor measures
Correspondence figure；
Each work period bent axle of screw compressor rotates 900 ° in the present embodiment, due to first pressure sensor 1
When being set to the air-breathing shape journey stage of fixed scroll, therefore the collected first pressure sensor 1 of computer being detected pressure data
The rotation angle of bent axle is defined as 0 °, and the rotation angle of bent axle is determined when the 4th pressure sensor 4 being detected, pressure data disappears
Justice is 900 °.In addition, since bent axle often rotates a circle triggering once close to switch, i.e., it is close to switch two adjacent endstop signal phases
Between bent axle just have rotated 360 °, therefore will divide equally close to the pressure data switched between two neighboring endstop signal can obtain it is each
The pressure data and the correspondence of crankshaft rotation angle that a pressure sensor measures, and first pressure sensor 1 is just examined
The rotation angle of bent axle when measuring pressure data is defined as 0 °, is rotated according to one work period bent axle of screw compressor
- 900 ° of fixed angle, selection obtain the compression cavity pressure that all pressure sensors of one work period of screw compressor measure
Data so obtain compression chamber pressure data that all pressure sensors measure and the accurate correspondence of crankshaft angles, such as
Shown in Fig. 3.
(3) the two of the same crankshaft rotation angle pressure datas measured to two neighboring pressure sensor, are chosen,
Selection principle is to choose the small pressure data of relative fluctuation, obtains the compression chamber number pressure in one work period of screw compressor
According to；If overlapped data is all relatively more steady, the data of previous sensor are just selected；
(4) bent axle is calculated according to the correspondence of the volume of the compression chamber of screw compressor and the rotation angle of bent axle
The volume of screw compressor during different rotary angle, and change curve of the screw compressor volume with crankshaft rotation angle is drawn,
As shown in Figure 4；
(5) according to the pressure data that measures of each pressure sensor and pair of crankshaft rotation angle obtained in step (2)
It is obtained in the compression chamber pressure data in one work period of screw compressor and step (4) that should be related to, are obtained in step (3)
Bent axle different rotary angle when screw compressor in compression chamber volume, draw the work indicator card of screw compressor.
In the description of the present invention, it should be noted that term " first ", " mat woven of fine bamboo strips two ", " third ", " the 4th " are only used for retouching
Purpose is stated, and it is not intended that instruction or hint relative importance.The method of present invention test screw compressor work indicator card,
Principle is also applicable to the test of other rotary compressor structures work indicator card.
Specific case used herein is expounded the principle of the present invention and embodiment, and above example is said
The bright method and its core concept for being merely used to help understand the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, in specific embodiments and applications there will be changes.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (5)
1. a kind of system for testing screw compressor work indicator card, it is characterised in that：Including power supply, input module, computer,
It several spaced pressure sensors of the vortex line of fixed scroll described in the fixed scroll upper edge of screw compressor and is arranged on
In screw compressor close to switch；Within a work period of screw compressor, always there is at least one pressure sensing
Device can measure the pressure of scroll compressor compresses intracavitary；For the detection faces close to switch towards bent axle, bent axle often rotates one
It can trigger in week primary described close to switch；Each pressure sensor and it is described close to switch respectively with the power supply, institute
State input module electrical connection, the input module is electrically connected with the computer, be provided in the computer can acquire, filter,
Display and save the software of the pressure sensor and the signal close to switch.
2. the system of test screw compressor work indicator card according to claim 1, it is characterised in that：The fixed scroll
Corresponding each pressure sensor is both provided with threaded hole, and the pressure sensor is threadedly coupled with the fixed scroll.
3. the system of test screw compressor work indicator card according to claim 1, it is characterised in that：The pressure passes
Sensor is four.
4. the system of test screw compressor work indicator card according to claim 1, it is characterised in that：The input mould
Block is electrically connected with the computer by USB connecting lines.
5. a kind of test whirlpool of the system of the test screw compressor work indicator card based on described in claim 1-4 any one
Revolve the method for compressor operating indicator card, it is characterised in that：
(1) screw compressor is opened, and screw compressor is made at least to run a work period, computer acquisition, is shown filtering
Show and preserve each pressure sensor measures in screw compressor operational process pressure data and the stop letter close to switch
Number；
(2) it is calculated the rotation angle of bent axle according to the initial position of bent axle and close to the endstop signal of switch, and according to
The fixed angle that described one work period bent axle of screw compressor is rotated was chosen in one work period of screw compressor
The pressure data that measures of each pressure sensor, obtain the pressure data that each pressure sensor measures and rotated with bent axle
The correspondence figure of angle；
(3) the two of the same crankshaft rotation angle pressure datas measured to two neighboring pressure sensor, are chosen, and are chosen
Principle is to choose the small pressure data of relative fluctuation, obtains the compression chamber pressure data in one work period of screw compressor；
(4) that bent axle is calculated from the correspondence of the rotation angle of bent axle according to the volume of the compression chamber of screw compressor is different
The volume of screw compressor during rotation angle, and draw change curve of the screw compressor volume with crankshaft rotation angle；
(5) the pressure data pass corresponding with crankshaft rotation angle measured according to each pressure sensor obtained in step (2)
The song obtained in system, the compression chamber pressure data in one work period of screw compressor obtained in step (3) and step (4)
The volume of screw compressor during axis different rotary angle draws the work indicator card of screw compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711431708.2A CN108131285A (en) | 2017-12-26 | 2017-12-26 | A kind of system and method for testing screw compressor work indicator card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711431708.2A CN108131285A (en) | 2017-12-26 | 2017-12-26 | A kind of system and method for testing screw compressor work indicator card |
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| Publication Number | Publication Date |
|---|---|
| CN108131285A true CN108131285A (en) | 2018-06-08 |
Family
ID=62393134
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711431708.2A Pending CN108131285A (en) | 2017-12-26 | 2017-12-26 | A kind of system and method for testing screw compressor work indicator card |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980907A (en) * | 2020-09-01 | 2020-11-24 | 苏州德姆斯信息技术有限公司 | Drawing method of reciprocating compressor indicator diagram |
| CN111997901A (en) * | 2020-08-13 | 2020-11-27 | 珠海格力电器股份有限公司 | Parameter determination device and method for compressor and compressor |
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|---|---|---|---|---|
| CN201386646Y (en) * | 2009-04-28 | 2010-01-20 | 西安科技大学 | Piston air refrigeration compressor indicator diagram testing device |
| CN104685212A (en) * | 2012-09-25 | 2015-06-03 | 艾默生环境优化技术有限公司 | Compressor having a control and diagnostic module |
| CN106016798A (en) * | 2016-07-08 | 2016-10-12 | 广东美的暖通设备有限公司 | Air conditioning system, scroll compressor and back pressure adjusting method of air conditioning system |
-
2017
- 2017-12-26 CN CN201711431708.2A patent/CN108131285A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201386646Y (en) * | 2009-04-28 | 2010-01-20 | 西安科技大学 | Piston air refrigeration compressor indicator diagram testing device |
| CN104685212A (en) * | 2012-09-25 | 2015-06-03 | 艾默生环境优化技术有限公司 | Compressor having a control and diagnostic module |
| CN106016798A (en) * | 2016-07-08 | 2016-10-12 | 广东美的暖通设备有限公司 | Air conditioning system, scroll compressor and back pressure adjusting method of air conditioning system |
Non-Patent Citations (1)
| Title |
|---|
| 刘四虎: "涡旋压缩机内压缩测试研究", 《流体机械》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111997901A (en) * | 2020-08-13 | 2020-11-27 | 珠海格力电器股份有限公司 | Parameter determination device and method for compressor and compressor |
| CN111997901B (en) * | 2020-08-13 | 2021-06-22 | 珠海格力电器股份有限公司 | Parameter determination device and method for compressor and compressor |
| CN111980907A (en) * | 2020-09-01 | 2020-11-24 | 苏州德姆斯信息技术有限公司 | Drawing method of reciprocating compressor indicator diagram |
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Application publication date: 20180608 |
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