CN201574904U - Structure for releasing high pressure in a clearance - Google Patents
Structure for releasing high pressure in a clearance Download PDFInfo
- Publication number
- CN201574904U CN201574904U CN2010201019873U CN201020101987U CN201574904U CN 201574904 U CN201574904 U CN 201574904U CN 2010201019873 U CN2010201019873 U CN 2010201019873U CN 201020101987 U CN201020101987 U CN 201020101987U CN 201574904 U CN201574904 U CN 201574904U
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- ball
- hole
- piston
- clearance
- high pressure
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Abstract
The utility model discloses a structure for releasing high pressure in a clearance, which solves the problem that the compressor clearance affects the efficiency. A through hole perforating the upper, lower surfaces is arranged on a piston and a ball, a spring and a stop screw with an exhaust vent, wherein the diameter of the through hole is larger than the diameter of the ball and the aperture at the top end of the through hole is less than the diameter of the ball and the inner surface of the top end of the through hole is a spherical surface anastomosed with ball. The ball withstands the spherical surface on the inner surface at the top end of the through hole and the ball partly exposes from the through hole and projects through the surface of the piston. When the piston is about to accomplish the compression stroke, the upper part of the ball projecting out from the piston is limited by a fixation valve plate to make the ball downwards shift. A high pressure cavity above the piston is connected with a low pressure cavity below the piston, thus the high pressure is released. The effect of the clearance on the efficiency is controlled in 2% therefore the efficiency of the compressor is greatly increased.
Description
Technical field
The utility model belongs to technical field of refrigeration compressors, particularly the structure of piston, valve plate.
Background technique
Piston Refrigerant Compreessor is made up of critical pieces such as body, bent axle, cylinder cap, valve plate, connecting rod, piston, motor, motor cover, bearing support and bottoms.By the motor turning crankshaft, bent axle drivening rod and piston move up and down in cylinder. on the cylinder face valve plate is installed.Have inlet hole and exhaust port on the valve plate, air-intake valve plate is housed below inlet hole, exhaust valve plate is housed above exhaust port.When piston moved down, exhaust valve plate was closed automatically owing to be subjected to high pressure.Owing to the pressure in the cylinder hole along with moving down of piston descends, when the pressure in the cylinder hole during less than suction pressure, air-intake valve plate is opened automatically.When moving on the piston, inner pressure of air cylinder increases gradually.When inner pressure of air cylinder during greater than suction pressure, air-intake valve plate is closed.Along with the further increase of internal pressure, exhaust valve plate is opened.This process moves in circles.
The factor that influences compressor efficiency has three: 1) sealing of intake and exhaust valve block is how; 2) the cylinder hole inwall high temperature that causes by the exhaust high pressure, thus cause the expansion of gas to reduce density, make effective work done descend; 3) clearance or claim residual space.Wherein topmost factor is clearance.
So-called clearance is made up of following 5 parts: 1) in order to prevent that piston from can directly not clash into valve plate, must leave certain space in the middle of both; 2) same reason to the thickness of air-intake valve plate, also must leave corresponding distance between piston and valve plate; 3) because exhaust valve plate above valve plate, the thickness of two exhaust ports and valve plate also forms certain clearance; 4) open the inclined-plane left and spacing for air-intake valve plate; 5) piston ring external diameter and the formed space of piston external diameter difference.Because the necessity that each clearance exists, after compressor had been finished compression stroke, this clearance had high pressure and high temperature.When piston enters intake stroke, must wait for that pressure inside drops to and be lower than suction pressure, could introduce the low-pressure gas of suction port in the cylinder.So having the clearance of high temperature and high pressure has been slatterned a big chunk expansion space stroke.With three cylinder refrigeration compressors is example: under different operating conditionss, promptly at high temperature (compression ratio 4-8), under the operating conditions of middle temperature (compression ratio 7-12) and low temperature (compression ratio 8-18), because the formed compression ratio difference of intake and exhaust high low pressure, clearance to the influence of efficient is respectively: 12-19%, 16-28%, 19-41%.Compression ratio is big more, and is big more to the influence of efficient.
Conventional improved procedure has: 1) process the shape and the degree of depth of air-intake valve plate on piston tip, greatly reduced the clearance that is produced by air-intake valve plate thickness thus; 2) shank type valve and valve board reduce the clearance that exhaust port causes.These methods have reduced clearance to a certain extent, have improved the efficient of compressor, but do not tackle the problem at its root.
The model utility content
In order to solve the problem that clearance influences compressor efficiency, a kind of brand new technical scheme that high pressure in the clearance is fallen in abrupt release is proposed.
The structure that the clearance inner high voltage can be discharged, its special way is to be provided with the through hole that runs through upper and lower surface on piston, ball, spring from top to bottom are installed in this through hole successively and the stopping screw of exhaust port is wherein arranged, the diameter of through hole is greater than the diameter of ball, but the aperture, top of through hole is less than the diameter of ball, and the internal surface on through hole top is the sphere that matches with ball.
After being installed in ball, spring and stopping screw in the through hole, by regulating stopping screw, make spring apply a predetermined pressure to ball, ball withstands on the spherical of through hole top internal surface, plays seal action.And ball exposes a part from through hole, leans out piston face.When piston normally moved up and down, the pressurized gas of piston upper end are hole leakage from then on not.But when piston will be finished compression stroke, the ball top that leans out piston can touch valve plate, and was subjected to the fixedly restriction of valve plate, caused ball to move down.So passage is opened, the loop has formed, and the clearance of hyperbaric chamber and following low-pressure cavity link naturally above the piston, has reached the d/d effect of high pressure.
The utlity model has following advantage.
1) do not had high pressure in the clearance, clearance just has been controlled to 2% to the influence of efficient, thereby has greatly improved the efficient of compressor.
2) do not had high pressure, high temperature also can descend naturally, thereby has improved the gas density of breathing process, has also reached the purpose of raising the efficiency.
3) high pressure is discharged to the compressor inner chamber, makes the pressure of inner chamber that corresponding increasing be arranged, thereby has also improved suction pressure, and this raising to system capability is that great positive effect is arranged.
4) because high pressure is the one of the main reasons that produces noise. do not had high pressure, the noise of compressor is also thereby descend.
5) prevented that refrigeration compressor from producing the possibility of liquid hammer.
Description of drawings
Whole-cutaway view when Fig. 1 is embodiment's a piston proper motion, Fig. 2 is partial enlarged drawing A, and the whole-cutaway view when Fig. 3 will finish compression stroke for piston, Fig. 4 are partial enlarged drawing B, and Fig. 5 is partial enlarged drawing C.
Embodiment
Embodiment
The structure that the clearance inner high voltage can be discharged, compression ring 1.1 and oil ring 1.2 are installed on piston 1, the central position of piston 1 is provided with the through hole 5 that runs through upper and lower surface, metal ball 4, spring 8 from top to bottom is installed in this through hole 5 successively and the stopping screw 7 of exhaust port 6 is wherein arranged.The diameter of through hole 5 is greater than the diameter of ball 4, but the aperture, top of through hole 5 less than the diameter of ball 4, and the sphere of the internal surface on through hole 5 tops for matching with ball 4.Can guarantee that like this ball 4 is free movable in through hole, under the effect of spring 8, can lean out, but can not deviate from from the top of through hole 5.Stopping screw 7 is a scyewed joint with the inwall of through hole 5, and rotation stopping screw 7 can be adjusted the pressure of 8 pairs of balls 4 of spring, and ball 4 is closely contacted with through hole 5, seals.Like this, can guarantee not leak when piston 1 normal moving process mesohigh gas in cylinder body 2.When piston 1 will be finished compression stroke, the ball 4 that leans out piston 1 is subjected to the fixedly restriction of valve plate 3, ball 4 breaks away from through hole 5, cause slit, through hole 5 and the exhaust port 6 of gas between ball 4 and through hole 5 in the hyperbaric chamber clearance above the piston 1 to be discharged to low-pressure cavity below the piston 1, reached the d/d effect of high pressure.
Claims (1)
1. can be with the structure of clearance inner high voltage release, it is characterized in that on piston, being provided with the through hole that runs through upper and lower surface, ball, spring from top to bottom are installed in this through hole successively and the stopping screw of exhaust port is wherein arranged, the diameter of through hole is greater than the diameter of ball, but the aperture, top of through hole is less than the diameter of ball, and the internal surface on through hole top is the sphere that matches with ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201019873U CN201574904U (en) | 2010-01-27 | 2010-01-27 | Structure for releasing high pressure in a clearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201019873U CN201574904U (en) | 2010-01-27 | 2010-01-27 | Structure for releasing high pressure in a clearance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201574904U true CN201574904U (en) | 2010-09-08 |
Family
ID=42694777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201019873U Expired - Fee Related CN201574904U (en) | 2010-01-27 | 2010-01-27 | Structure for releasing high pressure in a clearance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201574904U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209827A (en) * | 2018-10-22 | 2019-01-15 | 安徽寅时压缩机制造有限公司 | A kind of extrusion piston applied to conchoid compressor |
-
2010
- 2010-01-27 CN CN2010201019873U patent/CN201574904U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209827A (en) * | 2018-10-22 | 2019-01-15 | 安徽寅时压缩机制造有限公司 | A kind of extrusion piston applied to conchoid 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: 20100908 Termination date: 20140127 |