CN1250875C - Air compressor - Google Patents
Air compressor Download PDFInfo
- Publication number
- CN1250875C CN1250875C CNB021045607A CN02104560A CN1250875C CN 1250875 C CN1250875 C CN 1250875C CN B021045607 A CNB021045607 A CN B021045607A CN 02104560 A CN02104560 A CN 02104560A CN 1250875 C CN1250875 C CN 1250875C
- Authority
- CN
- China
- Prior art keywords
- aforementioned
- air
- piston
- press part
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
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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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Check Valves (AREA)
Abstract
The invnetion provides a rotary air compressor eliminating hunting phenomena causing noises or failures, which has durability and is smoothly operated by a structure of a check valve. This rotary air compressor comprises the check valve (13) of a piston/cylinder structure in an air suction passage (20). The check valve (13) is formed by comprising a valve element (21) free of blocking the air suction passage (20), a valve rod (22) for supporting the valve element (21), a piston (23) mounted on one end of the valve rod (22), a cylinder (24) supporting the piston (23) free of sliding, and a return spring (25) interposed between one end inside the cylinder (24) and the piston (23). A pair of air escape passages (39,42) for allowing inflow/outflow of air by sliding of the piston (23) is formed on the cylinder (24) and the escape passage (39) on a head side is made a small passage to be a throttle (S).
Description
Technical field
The present invention relates to a kind of rotary air compressor that is used on rail truck etc., in detail, relate to a kind of air suction path that sucks air that has, to suck the press part of path inhaled air compression from air, and allow air to flow, stop simultaneously air under the state that press part extrusion direction flows, to be arranged at the rotary air compressor that air sucks the check valve the path to the direction that sucks press part.
Background technique
Air compressor in the past is a structure shown in Figure 4.Promptly, by the press part (compressor body) 1 of compression with the air of oil, electric motor 3 by shaft coupling 2 drive compression portions 1, from oil saver 4 by recovered oil in the mixture of pressurized air of discharging the air compressor body 1 and oil, the oil separator 5 of separating oil from pressurized air, the recoler 7 that will cool off by pressurize one-way valve 6 except that the pressurized air after deoiling, can discharge compressed-air actuated electromagnetic exhaust valve 8, the oil temperature is adjusted valve 9, oil cooler 10, oil purifier 11, suck with air cleaner 12, check valve (suction valve) 13 and oily temperature switch 14 etc. constitute air compressor.
The check valve 13 that is arranged between air cleaner 12 and the press part 1 does not suck path, is the valve of air cleaner 12 adverse currents to air for making the high-pressure air that is produced by press part 1, do by the smooth earthquake of negative pressure, have the function that only allows air to flow into to press part 1.Promptly by have front end form the valve rod of valve piston, cylinder barrel, be arranged at the piston structure that the two return spring constitutes, formation can correctly be moved and is the good valve of durability simultaneously.
Summary of the invention
The negative pressure of this check valve by producing at press part overcomes return spring and opens valve to suck air, by return spring valve cuts out when no negative pressure, and the breakdown action of this valve is keeping at the press part duration of work.At this, because by long-term repetitive operation, resistance to sliding between piston and the cylinder body can reduce, the drive cycle of press part (for example period of revolution of a pair of screw rod) is identical one number time with the natural vibration of the return spring of check valve, produce the pulsation of return spring and, can bring out the vibration of valve to the piston transmission.Particularly because the air compressor used of rail truck is installed on subsurface, under the situation that takes place to vibrate when rail truck stops etc., noise can pass in the car.
The purpose of this invention is to provide and a kind ofly improve, eliminate the oscillation phenomenon that constitutes noise and failure cause, have the air compressor of durability and fluent movements by structure to check valve.
The structure of air compressor of the present invention is, have the air that sucks air and suck path, to suck the press part of path inhaled air compression from aforementioned air, to allow air to flow to the direction that sucks aforementioned press part, stop air to extrude state that direction flows simultaneously and be arranged at check valve on the aforementioned air suction portion path from aforementioned press part, it is characterized by, aforementioned check valve can freely interdict the valve body that air sucks path by having, support the valve rod of this valve body, be installed on the piston on this valve rod one end, support this piston and make it the cylinder barrel that can be free to slide, and the end and the return spring between the aforementioned piston that are installed in this cylinder barrel constitute, in aforementioned cylinder barrel, form to allow air to follow the slip of aforementioned piston and flow into and a pair of air that flows out usefulness is emitted the road, simultaneously, two emit the throttle orifice that limit air flow is set among at least one side in the road at this.
According to said structure, because a pair of air that forms is emitted the road,, can not produce the heat insulation compression in the cylinder body even piston moves to projected direction or the either party that is retracted into direction in cylinder barrel, can make piston not have unnecessary impedance and heating, smooth and easy and reciprocatingly slide trippingly.And, because emitting the road, a side air is provided with throttle orifice, limited inflow and the outflow of air to the cylinder chamber that is provided with this throttle orifice, and in the good action that does not hinder as check valve, can move the slip of piston and apply impedance.
That is to say,, can not vibrate though the natural vibration number of return spring, can be set in the mode that aforesaid pulsation does not take place by giving throttle orifice such impedance by its function decision.
In addition, structure characteristic of the present invention is, in above-mentioned structure, aforementioned throttle orifice is arranged at following emitting on the road, and this cylinder chamber that emits the head side that does not have aforementioned valve rod in the cylinder chamber in road and the aforementioned cylinder barrel that is divided into two parts by aforementioned piston links.
According to said structure, can bring into play the effect of throttle orifice well.Because by piston, space region in the cylinder is divided into side cylinder chamber, skirt section that has valve rod and the head side cylinder chamber that does not have valve rod, a pair of air is emitted the road at the indoor place that respectively is provided with of these two cylinders.In this occasion, and have lining or a sealed department that valve rod connects in that skirt section side cylinder is indoor with being free to slide, and do not have such sealed department in that the head side cylinder is indoor.Thus, head side cylinder chamber is compared with side cylinder chamber, skirt section, and indoor air is few from aforementioned leakage of emitting beyond the road.Thereby aforementioned throttle orifice is arranged at emitting of aforementioned head side cylinder chamber can access effective throttle orifice effect more on the road.
Moreover, structure characteristic of the present invention is, in above-mentioned structure, on the end wall of the aforementioned head side in the end wall of aforementioned cylinder barrel, be screwed with as the bolt that aforementioned check valve screw thread is installed on the rotating part of using on the aforementioned press part with the state that connects aforementioned end wall, on this bolt, be formed with aforementioned throttle orifice simultaneously.
According to said structure, can obtain following effect.Because usually check valve is to assemble on press part as pre-assembled parts, as the fastening operation of pre-assembling part with or adopt in the top of cylinder barrel freely fitted structure as the operating screw of the rotating part that check valve is screwed usefulness to press part.As concrete example, be screwed operating screw (with reference to Fig. 2) in the tapped hole that on running through the cylinder barrel upper wall, forms.In addition, this bolt hole is used as the maintenance in the cylinder barrel.
Thereby, because aforesaid reason, if throttle orifice such as aperture is set on the bolt of original equipment, then need not check valve is processed again, simultaneously, owing to can manufacture as the parts of on bolt body, having throttle orifice in advance, favourable on manufacturing efficiency and processing cost.
Description of drawings
Fig. 1 is the roughly functional system figure of all structures that air compressor of the present invention is shown.
Fig. 2 is the sectional drawing that the check valve structure is shown.
Fig. 3 illustrates the side view that cut a part of check valve to the press part assembled state.
Fig. 4 is the flow chart of rotary air compressor in the past.
Embodiment
Below, with reference to the accompanying drawings embodiments of the invention are described.
Fig. 1 shows the rotary air compressor A that rail truck is used.The essential structure of this rotary air compressor A is a known technology, and 1 is press part, and 2 is shaft coupling, 3 is electric motor, and 4 is oil saver, and 5 is oil separator, 6 are the pressurize one-way valve, and 7 is recoler, and 8 is electromagnetic exhaust valve, 9 is oil temperature regulator, and 10 is oil cooler, and 11 is oil purifier, 12 is air cleaner, and 13 is check valve, and 14 is oily temperature switch, 15 is cooling fan, and 16 is safety valve, and 17 is the draining case.In addition, has identical functions with parts with rotary air compressor same-sign shown in Figure 4.
At this, the roughly effect of rotary air compressor A is described.From cold air purification device 12 air of sending here and the oil phase companion who sends here from oil-feed path 18, compression in press part 1 with a pair of revolution screw rod of mutual interlock (example of solid of rotation) 1a, 1b, high-pressure air (pressurized air) is arranged in recover 4.Adjust valve 9 by the oil that oil saver 4 reclaims by the oil temperature, or it adjusts temperature with oil cooler 10,, revert in the press part 1 by oil-feed path 18 by oil purifier 11 filtrations.
On the other hand, removing oil content once more in oil separator 5 after, the high-pressure air of removing oil content in oil saver 4, is sent in the proper device such as dehumidifier by after pressurize one-way valve 6 and recoler 7 coolings.On oil separator 5, be connected with oil circuit 19 that the oil that will be herein reclaims returns to press part 1 and the electromagnetic exhaust valve 8 of the air extraction usefulness when stopping etc. as the action of carrying out compressor.
Press part 1 passes through a pair of screw rod 1a, the 1b by electric motor 3 revolution drivings, will suck the air of path 20 and accompany ground to compress from the oil phase of oil-feed path 18 and oil circuit 19 from the air that has check valve 13 in the way.The seal action of oil in the press part 1 that forms by a pair of screw rod 1a, 1b, has mechanical gap, owing to can carry out air compression.Under the situation, high-pressure air is through a pair of screw rod 1a, 1b adverse current when the action of this press part 1 stops etc.In order to prevent to refuel the ejection of air, check valve 13 is set, air is sucked path 20 on countercurrent direction, block.Below, check valve 13 is described in detail.
As Fig. 2, shown in Figure 3, to allow air to flow to the direction that sucks press part 1, stop air to have the valve body 21 that can freely interdict air suction path 20 simultaneously from the structure that the mobile state of press part 1 extrusion direction is arranged at the check valve 13 on the air suction path 20, front end is supported the valve rod 22 of this valve body 21, be installed on the piston 23 on these valve rod 22 1 ends, the cylinder barrel 24 of this piston 23 be can support with being free to slide, end in this cylinder barrel 24 and the return spring 25 between the piston are installed in.
The structure of valve body 21 is, have by damping spring 22a be fixed on the valve body 29 of valve rod 22 forward end, by spring support 30 elasticity baffle ring 34 that it is fixing with respect to valve rod 22, sealing composite part with cover 31 and valve seat 32.Valve seat 32, carries out Drop-proof by elasticity shelves ring 33 and handles to be absorbed in the chimeric setting of state in the valve body 29 for the sealing of the ring-type lower end 28a that improves stream shell portion 28 and valve body 29.
34 for preventing spring support 30 with respect to the come off elasticity shelves ring of usefulness of valve rod 22, and 35 for preventing that cover 31 is with respect to the come off elasticity shelves ring of usefulness of valve body 29.44 openings for loading and unloading cover 31 usefulness, 45 be lining, 46 is that lubricating grease between valve rod 22 and the lining 45 accumulates portion.
Piston 23 bolts are connected and fixed on the upper end of valve rod 22, spread over the upper face side of the following side of this piston 23 and cylinder body shell portion 26 and are equiped with return spring 25 around the state of valve rod 22.This return spring 25 makes piston 23 rise with respect to cylinder body shell portion 26, is under the free state at check valve 13, and the suction path 27 that will close the lower end 28a of closed channel shell portion by valve body 21 maintains dissengaged positions.
Ring is equipped with as check valve 13 and is installed in the screw section 28b that uses on the press part 1 on the intermediate portion up and down of stream shell portion 28, simultaneously, on the position that is equivalent to the valve center P on roof (end wall of the head side) 24a of head side tube part 24A, be formed with the perforation nut portions 36 that is used to be screwed into operating screw 37 usefulness.Operating screw 37 is for using as the rotation section of using screw section 28b with in the embedded mounting shell portion 38 that is screwed into press part 1 of cylinder barrel 24 time, this operating screw 37 is unloaded, can use to connect nut portions 36 and use the hole as maintenances such as the cleaning of the inside of cylinder barrel 24, maintenance.
As Fig. 2, shown in Figure 3, in operating screw 37, forming with respect to the head side cylinder chamber 40 that is surrounded by head side tube part 24A and piston 23 becomes the through hole 39 that air is emitted the road.The diameter of this through hole 39 is the throttle orifice S as diameter reduction, and this diameter is set at when the action of press part 1 stops, and can add the revert action size of the resistance of slow degree not that makes piston 23.Thereby, emit road 42 as there being the hole of abundant diameter laterally to be formed in the cylinder body shell portion 26 for the air of the side cylinder chamber, skirt section 41 that surrounds by cylinder body shell portion 26 and piston 23.
The check valve 13 of the above structure is assembled in advance as the ASSY parts of state shown in Figure 2, in press part 1 assembling, uses instrument revolution operating screws 37 such as spanner, and the screw section 28b of stream shell portion 28 is screwed among the 38a of screw portion of mounting shell portion 38.
As shown in Figure 3, under check valve 13 was assembled into state in the press part 1, air sucked path 20 and is connected by suction path 27 with the air inlet 1r of press part 1.But, when a pair of revolution screw rod 1a, 1b revolution, when air inlet generation negative pressure, overcome the elastic force of return spring 25 by it, piston 23 outstanding moving, valve body 21 leaves lower end 28a, and valve is open-minded, and air is entered.And the air at 2 places is emitted road 39,42 and is opened to air suction path 20 simultaneously.
Because the air at 2 places is emitted the existence on road 39,42, when piston 23 can be reciprocatingly slided trippingly, because the impedance with respect to the action of return spring 25 takes place in the existence with the air of head side cylinder chamber 40 is emitted the throttle orifice S of road 39 diameter reduction ground formation.
Thereby, even the eigentone of the return spring 25 as the eigentone of situations such as the rotating speed of electric motor 3 change occasion during with free state is consistent, return spring 25 can not pulsed, and the vibration and the unfavorable conditions such as noise or fault that cause owing to this reason can not take place.
Other embodiments
Emitting road 39 with respect to the air of head side cylinder chamber 40 can not be on the operating screw and directly be formed on the roof 24a.Air with respect to side cylinder chamber, skirt section 41 is emitted the orifice structure that road 42 can be used as diameter reduction.
The press part that the present invention uses is not limited to rotary type.Also can use shuttle press part.
The press part that the present invention uses is not limited to oil injection type.Also can use the press part that does not have oil.
Claims (5)
1. air compressor, have the air that sucks air and suck path, to suck the press part of path inhaled air compression from aforementioned air, be arranged at check valve on the aforementioned air suction portion path to allow air to flow, stop simultaneously air to extrude state that direction flows from aforementioned press part to the direction that sucks aforementioned press part, it is characterized by
Aforementioned check valve can freely interdict the valve body that air sucks path by having, support the valve rod of this valve body, be installed on the piston on this valve rod one end, support this piston and make it the cylinder barrel that can be free to slide, and the end and the return spring between the aforementioned piston that are installed in this cylinder barrel constitute
In aforementioned cylinder barrel, form to allow air to follow the slip of aforementioned piston and flow into and a pair of air that flows out usefulness is emitted the road, simultaneously, two emit the throttle orifice that limit air flow is set among at least one side in the road at this.
2. according to the described air compressor of claim 1, it is characterized by, aforementioned throttle orifice is arranged at following emitting on the road, and this cylinder chamber that emits the head side that does not have aforementioned valve rod in road and the cylinder chamber that is divided into by aforementioned piston in the aforementioned cylinder barrel of two parts links.
3. according to the described air compressor of claim 1, it is characterized by, on the end wall of the aforementioned head side in the end wall of aforementioned cylinder barrel, be screwed with as the bolt that aforementioned check valve screw thread is installed on the rotating part of using on the aforementioned press part with the state that connects aforementioned end wall, on this bolt, be formed with aforementioned throttle orifice simultaneously.
4. according to the described air compressor of claim 1, it is characterized by, have the oily inlet passage that enters oil, aforementioned press part will suck the path inhaled air from aforementioned air and compress, and this air is attended by the oil that enters from oily inlet passage.
5. according to the described air compressor of claim 1, it is characterized by, aforementioned press part is the rotary type with solid of rotation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32525/01 | 2001-02-08 | ||
| JP2001032525A JP3550098B2 (en) | 2001-02-08 | 2001-02-08 | Rotary air compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1369646A CN1369646A (en) | 2002-09-18 |
| CN1250875C true CN1250875C (en) | 2006-04-12 |
Family
ID=18896440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021045607A Expired - Fee Related CN1250875C (en) | 2001-02-08 | 2002-02-08 | Air compressor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3550098B2 (en) |
| KR (1) | KR100442476B1 (en) |
| CN (1) | CN1250875C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1949198B1 (en) * | 2005-11-09 | 2010-12-22 | Ixetic Bad Homburg GmbH | Intake-gas throttle device |
| CN101054975B (en) * | 2007-05-30 | 2010-05-19 | 白明 | Rotary piston type compressor |
| ITFI20110145A1 (en) * | 2011-07-19 | 2013-01-20 | Nuovo Pignone Spa | A DIFFERENTIAL PRESSURE VALVE WITH PARALLEL BIASING SPRINGS AND METHOD FOR REDUCING SPRING SURGE |
| US10954943B2 (en) | 2013-12-19 | 2021-03-23 | Carrier Corporation | Compressor comprising a variable volume index valve |
| US9863421B2 (en) * | 2014-04-19 | 2018-01-09 | Emerson Climate Technologies, Inc. | Pulsation dampening assembly |
| KR20150145387A (en) | 2014-06-19 | 2015-12-30 | 한국에어로(주) | A compressor with enhanced energy efficiendy and ellminated oil gas |
-
2001
- 2001-02-08 JP JP2001032525A patent/JP3550098B2/en not_active Expired - Fee Related
- 2001-11-22 KR KR10-2001-0072888A patent/KR100442476B1/en not_active IP Right Cessation
-
2002
- 2002-02-08 CN CNB021045607A patent/CN1250875C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR20020066174A (en) | 2002-08-14 |
| JP3550098B2 (en) | 2004-08-04 |
| KR100442476B1 (en) | 2004-07-30 |
| CN1369646A (en) | 2002-09-18 |
| JP2002235687A (en) | 2002-08-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20060412 Termination date: 20120208 |