CN202381336U - Slide valve position feedback device of helical-lobe compressor - Google Patents
Slide valve position feedback device of helical-lobe compressor Download PDFInfo
- Publication number
- CN202381336U CN202381336U CN2012200010014U CN201220001001U CN202381336U CN 202381336 U CN202381336 U CN 202381336U CN 2012200010014 U CN2012200010014 U CN 2012200010014U CN 201220001001 U CN201220001001 U CN 201220001001U CN 202381336 U CN202381336 U CN 202381336U
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- slide valve
- piston
- coil
- oil cylinder
- piston rod
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Abstract
The utility model relates to a slide valve position feedback device of a helical-lobe compressor. The slide valve position feedback device is arranged on a slide valve regulation mechanism of the helical-lobe compressor; the slide valve regulation mechanism comprises a slide valve, an oil cylinder, a piston and a piston rod, wherein the piston is arranged in the oil cylinder; the feedback device comprises a housing and a coil, wherein the housing is fixed on the side wall at one end of the oil cylinder through a connecting bolt, the coil is arranged in the housing, the central axis of the coil is in coincidence with that of the piston rod; one end of the piston rod outstretches outside of the oil cylinder to be connected with the slide valve, and the other end of the piston rod passes through the piston and the cylinder to be arranged in the middle of the coil; the piston rod is fixedly connected with the piston, and an input binding post and an output binding post are connected at two sides of the coil respectively. The slide valve position feedback device is simple in structure, not only provides foundation for measurement of gas transmission capacity of the helical-lobe compressor at various slide valve positions, but also provides guarantee for frequency variable adjustment under low load. The slide valve position feedback device is also applied to capacity regulating system for conventional screw compressor, has a higher degree of precision, and better reflects the energy-saving characteristics when performing frequency variable control especially under low load.
Description
Technical field
The utility model relates to a kind of spool position feedback means, specifically a kind of spool position feedback means of helical-lobe compressor.
Background technique
Current, along with country requires increasing aerodynamic force industry and the cryogenic refrigeration industry of being applied to of helical-lobe compressor to the requirement of energy-saving and emission-reduction and user to Mean time to failure of device.Because the requirement of performance characteristic, the displacement of helical-lobe compressor is bigger usually, and it is bigger to be equipped with motor power (output).In order to adapt to the requirement of load variations, helical-lobe compressor has energy regulating system mostly, adopts the guiding valve feel trim actuator can realize 15%～100% energy adjustment in theory.But 50% when following, because motor speed does not change, cause in the guiding valve adjustment process, power consumption is bigger, thus exist more serious " low load with strong power " phenomenon, so should not under low-load, work.In order to realize the control characteristic of low-load, can adopt the mode of variable frequency adjustment.Induction-motor load characteristic and compressor load characteristic are complementary.And present guiding valve controlling device adopts the servo-actuated measure mostly, does not have position feedback device, and several solenoid valves of just simple employing or three-position four-way valve are according to the control spool position of the variation servo-actuated of load during adjusting, and the displacement degree of regulation is low.So in order to obtain the part throttle characteristics of compressor accurately, just must obtain the position of guiding valve more accurately, need install a cover position sensing device additional.
The model utility content
The utility model wants the technical solution problem to provide a kind of spool position feedback means; Simple in structure, do not change the helical-lobe compressor original structure, can be used for conventional screw rod function regulating system; Realize continuous adjusting truly; And precision is higher, when especially low-load situation down coversion is controlled, more embodies characteristics of energy saving.
The utility model is for solving the problems of the technologies described above, and the technological scheme that is provided is: a kind of spool position feedback means of helical-lobe compressor is arranged on the helical-lobe compressor guiding valve controlling mechanism; The guiding valve controlling mechanism comprises guiding valve, oil cylinder, piston and piston rod; Piston is arranged in the oil cylinder, and feedback means comprises housing and coil, and housing is fixed on the oil cylinder one distolateral wall through connecting bolt; Coil is arranged in the housing; The central axis of coil and the dead in line of piston rod, an end of piston rod are stretched out oil cylinder and are connected with guiding valve, and the other end passes piston and oil cylinder is arranged in the middle of the coil; Be fixedly connected between piston rod and the piston, the both sides of coil are connected with lead-in clamp and output wiring terminal respectively.
The beneficial effect of the utility model is: simple in structure, do not change the helical-lobe compressor structure, and be not merely that the measurement of helical-lobe compressor displacement provides foundation under the different spool positions, also regulating for the low-load down coversion provides assurance.This position feedback mechanism can be used for conventional screw rod function regulating system simultaneously, realize continuous adjusting truly, and precision is higher, when especially low-load situation down coversion is controlled, more embodies characteristics of energy saving.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the schematic representation that is connected of sensor and piston oil-cylinder in the utility model.
Mark among the figure: 1, guiding valve, 2, oil cylinder, 3, piston, 4, piston rod, 5, housing, 6, coil, 7, lead-in clamp, 8, output wiring terminal.
Embodiment
As shown in the figure: a kind of spool position feedback means of helical-lobe compressor; Be arranged on the helical-lobe compressor guiding valve controlling mechanism, the guiding valve controlling mechanism comprises guiding valve 1, oil cylinder 2, piston 3 and piston rod 4, and piston 3 is arranged in the oil cylinder 2; Feedback means comprises housing 5 and coil 6; Housing 5 is fixed on the oil cylinder 2 one distolateral walls through connecting bolt, and coil 6 is arranged in the housing 5, the dead in line of the central axis of coil 6 and piston rod 4; One end of piston rod 4 stretches out oil cylinder 2 and is connected with guiding valve 1; The other end passes piston 3 and oil cylinder 2 and is arranged in the middle of the coil 6 as iron core, is fixedly connected between piston rod 4 and the piston 3, and the both sides of coil 6 are connected with lead-in clamp 7 and output wiring terminal 8 respectively.
Input 220v or 24v VDC on lead-in clamp 7, output wiring terminal 8 output voltages.When oil cylinder piston 3 promoted guiding valve 1 and moves under oil pressure actuated when, effective active section of screw rod machine rotor changed the helical-lobe compressor energy change.This moment and piston 3 and mobile in coil 6 with the iron core of piston rod 4 one, and housing 5 and coil 6 are fixed, make coil 6 sense the variation of guiding valve 1 displacement, the displacement of output voltage and guiding valve 1 is linear, has fed back the variation of its position preferably.Promptly want to obtain accurately the position of guiding valve 1, as long as obtain output voltage values.When the helical-lobe compressor energy is reconciled,, regulated the displacement of compressor accurately simultaneously, guaranteed the accuracy that guiding valve 1 is regulated as long as output voltage is fed back to the position that regulator just can directly be controlled oil cylinder piston 3 and guiding valve 1.Characteristics such as that this feedback means has is simple in structure, output impedance is little, antijamming capability is strong, highly sensitive, measuring accuracy height are suitable for the control requirement of system fully.
Claims (1)
1. the spool position feedback means of a helical-lobe compressor; Be arranged on the helical-lobe compressor guiding valve controlling mechanism; The guiding valve controlling mechanism comprises guiding valve (1), oil cylinder (2), piston (3) and piston rod (4); Piston (3) is arranged in the oil cylinder (2), it is characterized in that: feedback means comprises housing (5) and coil (6), and housing (5) is fixed on oil cylinder (2) the one distolateral walls through connecting bolt; Coil (6) is arranged in the housing (5); The dead in line of the central axis of coil (6) and piston rod (4), an end of piston rod (4) are stretched out oil cylinder (2) and are connected with guiding valve (1), and the other end passes piston (3) and oil cylinder (2) is arranged in the middle of the coil (6); Be fixedly connected between piston rod (4) and the piston (3), the both sides of coil (6) are connected with lead-in clamp (7) and output wiring terminal (8) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200010014U CN202381336U (en) | 2012-01-04 | 2012-01-04 | Slide valve position feedback device of helical-lobe compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200010014U CN202381336U (en) | 2012-01-04 | 2012-01-04 | Slide valve position feedback device of helical-lobe compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202381336U true CN202381336U (en) | 2012-08-15 |
Family
ID=46629842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200010014U Expired - Fee Related CN202381336U (en) | 2012-01-04 | 2012-01-04 | Slide valve position feedback device of helical-lobe compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202381336U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105793572A (en) * | 2013-12-12 | 2016-07-20 | Gea制冷德国公司 | Compressor |
| CN111255692A (en) * | 2020-01-15 | 2020-06-09 | 珠海格力电器股份有限公司 | Screw compressor system capable of accurately adjusting load, control method and air conditioner |
-
2012
- 2012-01-04 CN CN2012200010014U patent/CN202381336U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105793572A (en) * | 2013-12-12 | 2016-07-20 | Gea制冷德国公司 | Compressor |
| CN111255692A (en) * | 2020-01-15 | 2020-06-09 | 珠海格力电器股份有限公司 | Screw compressor system capable of accurately adjusting load, control method and air conditioner |
| CN111255692B (en) * | 2020-01-15 | 2021-02-19 | 珠海格力电器股份有限公司 | Control method of screw compressor system capable of accurately adjusting load |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20130104 |