CN200964947Y - Frequency conversion screw type refrigeration compressor with wide refrigeration range - Google Patents
Frequency conversion screw type refrigeration compressor with wide refrigeration range Download PDFInfo
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- CN200964947Y CN200964947Y CN 200620042621 CN200620042621U CN200964947Y CN 200964947 Y CN200964947 Y CN 200964947Y CN 200620042621 CN200620042621 CN 200620042621 CN 200620042621 U CN200620042621 U CN 200620042621U CN 200964947 Y CN200964947 Y CN 200964947Y
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Abstract
The utility model discloses a frequency-conversion screw refrigeration compressor which includes a compressor control device which has the functions of frequency-conversion and speed regulation, a frequency-conversion high-speed motor, a shell, a bearing, a drive screw rotor and a driven screw rotor; the frequency-conversion screw refrigeration compressor is used to support the bearings of the drive screw rotor and the driven screw rotor at the limit rotation speed more than 9000r/min; the component of forces in axial and radial direction are directional high limit rotation speed bearing and solves the technical problem of that the bearing does not have a good reliability when the bearing runs under 150Hz. The utility model is applied to the refrigerants of R134a, R407C, R404A, R410A and R22 and has a temperature range of plus 20 DEG C - minus 40 DEG C.
Description
Technical field:
The utility model relates to a kind of refrigeration compressor, relates in particular to a kind of semi-closed screw type refrigerating compressor, the semiclosed frequency-variable screw type refrigerating compressor that particularly a kind of scope of freezing is wide.
Background technique:
Refrigeration compressor is absolutely necessary in refrigeration system.The compressor that is widely used at present mainly contains piston type, eddy type, screw type, centrifugal etc.
Existing screw type refrigerating compressor all adopts initiatively screw rotor rotation of motor driving, and by active screw rotor driving driven rotor, screw rotor is divided into the yin, yang rotor, the yin, yang rotor is meshing with each other, and the rotor cylindrical cooperates with housing, when the working rotor of engagement to when rotation, volume between rotor teeth groove and the housing changes, thereby realize the suction of gas, continuous gas compression circulation is finished in compression and discharge.
Early stage screw type refrigerating compressor is the fixed rotating speed working method, can't carry out energy adjustment by speed change, in the large-scale Spiral Lobe Refrigeration Compressor, can adopt the sliding valve style capacity controlling gear, but because sliding valve style capacity controlling gear complex structure, requirement machining accuracy height, the cost height, so in the conventional air-conditioning refrigeration compressor, seldom adopt, conventional air-conditioning is with in the screw type refrigerating compressor, capacity controlling gear all is not set, the screw type refrigerating compressor structure is greatly simplified, and significantly reduced manufacture cost.In order to realize the portion of energy adjusting, in the common cover refrigeration system, the compressor (being called for short the multimachine head system) of a plurality of noenergy controlling devices is set, by part shutdown method, realize the finite energy adjusting.Though after adopting the multimachine head, can realize the classification energy adjustment, increase the reliability of unit, but increased the rate of fault and the maintenance management workload of unit simultaneously, increased cost.
For this reason, the Chinese patent publication number is that CN2538982Y discloses a kind of rotary screw gas compressor, and this device comprises variable-frequency governor, variable frequency high-speed motor, housing, bearing, active screw rotor and driven screw rotor.It is by changing variable frequency high-speed motor frequency adjustment rotating speed, thereby realize overall process stepless change energy adjustment, simultaneously, motor speed can move under the power frequency supply synchronous speed, significantly improve the air displacement of screw type cold compression set, the specific refrigerating effect cost of compression set is descended, reduced unit volume.
Because frequency-variable screw type refrigerating compressor exists above-mentioned advantage, has increasing cooling machine set to bring into use the variable-frequency type refrigeration compressor at present.But the frequency-variable screw type refrigerating compressor of selling on the existing market exists the frequency conversion scope narrow, and maximum frequency conversion scope is 30Hz-120Hz, the deficiency that single-unit cold scope is broad inadequately.
At present, along with the progress of bearing technology, the frequency conversion scope of semi-closed screw type refrigerating compressor rises to 150Hz from 130Hz, makes single-unit cold scope relatively broader.
The model utility content:
The purpose of this utility model is in order to solve above-mentioned existing bearing poor technical problem of operational reliability under 150Hz, and provides a kind of scope of freezing wide frequency-variable screw type refrigerating compressor.
To achieve these goals, the utility model is achieved through the following technical solutions:
The wide frequency-variable screw type refrigerating compressor of a kind of scope of freezing, comprise the compressor control device, variable frequency high-speed motor, seal and pressure bearing housing, bearing, active screw rotor and the driven screw rotor composition that comprise tool frequency control of motor speed function, the non-control power output end of compressor control device and the power-line terminal of variable frequency high-speed motor link to each other, the axle of variable frequency high-speed motor is connected with the active screw rotor, and initiatively screw rotor drives driven screw rotor rotation; Housing is provided with suction, relief opening, in be provided be communicated with to inhale, the gas flow of relief opening; It is characterized in that: the bearing of described active screw rotor and driven screw rotor is that limit speed is bearing in the housing greater than 9000r/min, high limit rotating speed bearing axial, that radial component is directivity.
Owing to adopted technological scheme as above, the utility model can move under 150Hz reliably, makes single-unit cold scope broad more.The utility model goes for R134a, R407C, R404A, R410A, R22 refrigerant, uses warm territory scope and is+20 ℃ ∽-50 ℃.
Description of drawings:
Further specify the utility model below in conjunction with the drawings and specific embodiments.
Fig. 1 is the structural representation of the utility model frequency-variable screw type refrigerating compressor.
Embodiment:
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1, the frequency-variable screw type refrigerating compressor that a kind of scope of freezing is wide is made up of the compressor control device 1 that comprises tool frequency control of motor speed function, variable frequency high-speed motor 2, housing 6, bearing 3, active screw rotor 7 and driven screw rotor 8, the terminal block (not shown) of the output termination variable frequency high-speed motor 3 of compressor control device 1, the power supply of variable frequency is provided to variable frequency high-speed motor 2, the axle of variable frequency high-speed motor 3 is connected with active screw rotor 7, and initiatively screw rotor 7 drives driven screw rotor 8 rotations; Initiatively screw rotor 7 and driven screw rotor 8 are bearing in the housing 6 by bearing 3; Active screw rotor 7 and driven screw rotor 8 be the yin, yang rotor each other, the yin, yang rotor is meshing with each other, the rotor cylindrical cooperates with housing 6, when the yin, yang rotor of engagement rotates 7 and 8, volume between rotor teeth groove and the housing 6 can change, thereby realize suction, compression and the discharge of gas, finish continuous gas compression circulation.
Adopt variable frequency high-speed motor 2 direct driving rotors, under declared working condition,, improve rotor speed and reach 9000rpm by improving the about 150Hz of frequency of okperation of motor power.
Therefore, this frequency-variable screw type refrigerating compressor is used to support initiatively, and the bearing 3 of screw rotor 7 and driven screw rotor 8 is adopted as limit speed greater than 9000r/min, it is axial, radial component is the high limit rotating speed bearing of directivity, to improve the bearing reliability of operation.Simultaneously in order to adapt to the running of high rotating speed, big air displacement, to reduce noise and to increase refrigerating capacity, the gas flow 63 of suction, relief opening 61,62 and connection suction, relief opening is suitably strengthened, and wherein the flow area of suction, relief opening 61,62 is bigger by 30% than suction, the relief opening 61,62 of the frequency-variable screw type refrigerating compressor of routine; The gas flow 63 that the flow area that is communicated with the gas flow 63 of suction, relief opening compares the connection suction of conventional frequency-variable screw type refrigerating compressor, relief opening is big by 30%.
Above-mentioned frequency-variable screw type refrigerating compressor can R134a, R407C, R404A, R410A, R22 refrigerant, uses warm territory scope and is+20 ℃ ∽-40 ℃.
More than show and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (1)
1, the wide frequency-variable screw type refrigerating compressor of a kind of scope of freezing, comprise the compressor control device, variable frequency high-speed motor, seal and pressure bearing housing, bearing, active screw rotor and the driven screw rotor composition that comprise tool frequency control of motor speed function, the non-control power output end of compressor control device and the power-line terminal of variable frequency high-speed motor link to each other, the axle of variable frequency high-speed motor is connected with the active screw rotor, and initiatively screw rotor drives driven screw rotor rotation; Housing is provided with suction, relief opening, in be provided be communicated with to inhale, the gas flow of relief opening; It is characterized in that: it is characterized in that: the bearing of described active screw rotor and driven screw rotor is that limit speed is bearing in the housing greater than 9000r/min, high limit rotating speed bearing axial, that radial component is directivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620042621 CN200964947Y (en) | 2006-06-09 | 2006-06-09 | Frequency conversion screw type refrigeration compressor with wide refrigeration range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620042621 CN200964947Y (en) | 2006-06-09 | 2006-06-09 | Frequency conversion screw type refrigeration compressor with wide refrigeration range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200964947Y true CN200964947Y (en) | 2007-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620042621 Expired - Lifetime CN200964947Y (en) | 2006-06-09 | 2006-06-09 | Frequency conversion screw type refrigeration compressor with wide refrigeration range |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200964947Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499631A (en) * | 2016-11-04 | 2017-03-15 | 西安航空动力控制科技有限公司 | A kind of roots blower |
-
2006
- 2006-06-09 CN CN 200620042621 patent/CN200964947Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499631A (en) * | 2016-11-04 | 2017-03-15 | 西安航空动力控制科技有限公司 | A kind of roots blower |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20071024 |
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| EXPY | Termination of patent right or utility model |