CN201106559Y - Electric control loading device of screw type compressor - Google Patents
Electric control loading device of screw type compressor Download PDFInfo
- Publication number
- CN201106559Y CN201106559Y CNU2007200391443U CN200720039144U CN201106559Y CN 201106559 Y CN201106559 Y CN 201106559Y CN U2007200391443 U CNU2007200391443 U CN U2007200391443U CN 200720039144 U CN200720039144 U CN 200720039144U CN 201106559 Y CN201106559 Y CN 201106559Y
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- Prior art keywords
- loading device
- control loading
- guiding valve
- motor
- utility
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Abstract
The utility model discloses an electrical control loading device of a screw type compressor, which comprises a drive set which can drive a slide valve to move. The drive set is an electrical motor. The utility model can greatly accelerate response speed of the power regulating slide valve of the screw type compressor, avoid the inaccurate positioning condition of a hydraulic system due to reasons such as leakage, etc., avoid block of a piston cylinder, etc. due to oil pollution and easily achieve the stepless adjustment of the gas transmission rate of the compressor at the same time.
Description
Technical field
The utility model relates to a kind of screw compressor electronic control loading device.
Background technique
Screw compressor is to be meshing with each other by the rotor that contains spiral alveolar, and the refrigerant gas compression is carried out in the variation of the element volume that the profile of tooth space is formed, and compressed refrigeration working medium is pushed forward discharge along screw spiral line direction.Because of its structure is simple relatively, few easy workout part, characteristics such as insensitive to liquid hammer, as to adapt to high pressure ratio differential pressure operating mode work and being widely used in steam compression type refrigerating apparatus, particularly the guiding valve displacement can realize that 10%～100% stepless adjustment screw rod compressor application is the most general.In actual the use, owing to the variation of load or in order to unload startup, need regulate, and at present, the displacement of screw compressor is regulated mainly to regulate by guiding valve and is carried out displacement.Its method is that an axial transportable guiding valve is set between rotor, and the axial position of guiding valve moves and can change the effective active length of screw rotor (promptly changing compressor yin, yang screw rod between cog workpiece volume), thereby realizes the adjusting of displacement.The axially movable power of guiding valve is mainly to finish by fluid drive mechanism, and the control unit of fuel feeding process is an electromagnetic valve group.
Typical hydraulic mechanism urges guiding valve carries out the principle simplified schematic diagram that displacement is regulated, as shown in Figure 1 and Figure 2.Among Fig. 1: the control of guiding valve is to realize by the motion of controlling oily piston.Solenoid directional control valve must have two groups of solenoid valves to constitute (solenoid valve a1 and a2 are one group, and solenoid valve b1 and b2 are other one group), during every group of solenoid valve switching electricity, opens in the time of on the same group or closure.Two groups of switching electricity have simultaneously not just formed two groups and have moved towards different oil return lines, and piston (guiding valve) can move by both direction.Among Fig. 2: the control of guiding valve also is to realize by the motion of controlling oily piston.Different is, Driven by Hydraulic Cylinder mode difference, and piston one side connected system high pressure side lubricant pipe, opposite side connected system low pressure air suction mouth, unloading solenoid valve or load solenoid valve switching electricity forms piston both sides oil pressure difference and promotes pistons (guiding valve) and move.
Because such guiding valve is regulated power from hydraulic driving oil cylinder, so system need be provided with solenoid valve valve group, piston, oil cylinder, solenoid valve, Returnning spring, complicated oil pipe lines etc. cause compressor capacity adjusting portion separation structure complexity, volume big, and the pollution of hydraulic oil can block oil duct or make seizure of piston etc., cause compressor can't normal load, unloading, thereby influence the normal use of helical-lobe compressor.
In addition, hydraulic mechanism has than growth process to load cylinder is oil-filled obtaining load instructions, can not respond rapidly as requested, and the problem that produces control lag like this has a strong impact on control accuracy, also wastes energy.Simultaneously, this class helical-lobe compressor is in loading procedure, and total the existence leaked (O-ring seals can not play the effect of sealing fully) between the hydraulic piston of driving guiding valve and the oil hydraulic cylinder, thereby causes the unstable situation of spool position.
Summary of the invention
The utility model purpose is: for overcoming above hydraulic system structure complexity, the guiding valve low-response occurring and locate inaccurate, unsettled defective when driving, a kind of screw compressor electronic control loading device is provided, this system adopts the drive unit that has feedback or do not have feedback such as stepper motor, actuating motor, common AC/DC motor equal power device to come the replacement liquid press mechanism, directly drives guiding valve and moves.
The technical solution of the utility model is: a kind of screw compressor electronic control loading device comprises driving the drive unit that guiding valve moves that described drive unit is a motor.
One of further technological scheme of the utility model is: a kind of screw compressor electronic control loading device, comprise driving the drive unit that guiding valve moves, and described drive unit is linear electric motor, linear electric motor can directly drive guiding valve.
Two of the further technological scheme of the utility model is: a kind of screw compressor electronic control loading device, comprise driving the drive unit that guiding valve moves, and described drive unit is a common electric machine, common electric machine can drive guiding valve indirectly by switching mechanism.Described motor is an actuating motor; Described switching mechanism is ball screw.
The utility model has the advantages that:
1. because the volume of motor is little a lot of with respect to the volume of hydraulic oil system, therefore can reduce the volume of compressor greatly.
2. because the actuating motor response is fast, location standard, thereby displacement control accuracy height have also been eliminated hysteresis effect and spool position unstable problem simultaneously.
3. simple in structure owing to actuating motor, the reliability height, thus improve compressor reliability.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1, Fig. 2 are the simplified schematic diagram of prior art;
Fig. 3 is a simplified schematic diagram of the present utility model.
Wherein: 1 drive unit; 2 guiding valves; 3 motors; 4 switching mechanisms.
Embodiment
Embodiment: a kind of screw compressor electronic control loading device, comprise driving the drive unit that guiding valve moves, drive unit can be linear electric motor, linear electric motor can directly drive guiding valve; Drive unit also can be common electric machine, and common electric machine can drive guiding valve indirectly by switching mechanism.
As shown in Figure 3, the drive unit that the driving guiding valve moves is an actuating motor, and actuating motor drives guiding valve indirectly by ball screw.
The utility model adopts the actuating motor 3 of being with feedback, and system can move thereby control screw rod unit guiding valve 2, and accurately locate according to the feedback signal control leading screw slide block straight line motion of actuating motor 3.
Use such driven by servomotor device 1, can realize shift action according to the feedback signal of pressure of inspiration(Pi) and temperature, speed of response is accelerated greatly, do not have hydraulic system because of leaking etc. former thereby the inaccurate situation in location that occur takes place yet, phenomenons such as the piston cylinder that causes because of oil pollution is stuck more can not occur and take place.Simultaneously can dwindle the machine packet size effectively, the step-less adjustment of also easier realization compressor displacement.
Below only be concrete exemplary applications of the present utility model, protection domain of the present utility model is not constituted any limitation.In addition to the implementation, the utility model can also have other mode of execution.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop within the utility model scope required for protection.
Claims (5)
1. a screw compressor electronic control loading device comprises driving the drive unit (1) that guiding valve (2) moves, and it is characterized in that: described drive unit (1) is a motor (3).
2. according to the screw compressor electronic control loading device described in the claim 1, it is characterized in that: described motor (3) is linear electric motor, and linear electric motor directly drive guiding valve (2).
3. according to the screw compressor electronic control loading device described in the claim 1, it is characterized in that: described motor (3) is a common electric machine, and common electric machine can drive guiding valve (2) indirectly by switching mechanism (4).
4. according to the screw compressor electronic control loading device described in the claim 3, it is characterized in that: described motor (3) is an actuating motor.
5. according to the screw compressor electronic control loading device described in the claim 3, it is characterized in that: described switching mechanism (4) is ball screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200391443U CN201106559Y (en) | 2007-05-24 | 2007-05-24 | Electric control loading device of screw type compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200391443U CN201106559Y (en) | 2007-05-24 | 2007-05-24 | Electric control loading device of screw type compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201106559Y true CN201106559Y (en) | 2008-08-27 |
Family
ID=39958358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200391443U Expired - Fee Related CN201106559Y (en) | 2007-05-24 | 2007-05-24 | Electric control loading device of screw type compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201106559Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937084A (en) * | 2012-10-30 | 2013-02-20 | 合肥通用机械研究院 | Air volume regulating system for compressor |
-
2007
- 2007-05-24 CN CNU2007200391443U patent/CN201106559Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937084A (en) * | 2012-10-30 | 2013-02-20 | 合肥通用机械研究院 | Air volume regulating system for compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080827 Termination date: 20140524 |