CN106164488A

CN106164488A - Compressor

Info

Publication number: CN106164488A
Application number: CN201580017575.7A
Authority: CN
Inventors: 池田英明; 贞方康辅
Original assignee: Hitachi Industrial Equipment Systems Co Ltd
Current assignee: Hitachi Industrial Equipment Systems Co Ltd
Priority date: 2014-04-07
Filing date: 2015-03-27
Publication date: 2016-11-23
Anticipated expiration: 2035-03-27
Also published as: WO2015156144A1; JP6581567B2; CN106164488B; JPWO2015156144A1

Abstract

It is an object of the invention to provide a kind of compressor, improve valve and the sealing of exhaust (air-breathing) mouth, suppress compressed-air actuated adverse current and improve compression efficiency.To achieve these goals, the present invention provides a kind of compressor being compressed fluid by motor-driven, it is characterized in that, including: it is provided with the seat board of the mouth passing through for described fluid and is located at seat board and carrys out the valve that counterpart carries out opening and closing, the face of the side contacting with valve of seat board being formed the central part towards mouth and goes and the inclined plane of step-down.

Description

Compressor

Technical field

The present invention relates to compressor.

Background technology

As the background technology of the art, there is Japanese Unexamined Patent Publication 2007-146761 publication (patent document 1).

Having a kind of reciprocating compressor described in patent document 1, " the annular valve seat surface surrounding exhaust outlet is formed at valve Plate, surround annular valve seat surface annular sealing surface be formed at valve plate, annular valve seat surface compared with annular sealing surface to cylinder diameter side Skew, when the differential pressure of exhaust chamber internal pressure and cylinder diameter internal pressure is zero, air bleeding valve abuts with annular sealing surface, reaches in above-mentioned differential pressure During positive setting, air bleeding valve elastic deformation and abut with annular valve seat surface ".

Prior art literature

Patent document

Patent document 1: Japanese Unexamined Patent Publication 2007-146761 publication

Content of the invention

Invent problem to be solved

The annular valve seat surface of the encirclement exhaust outlet of the reciprocating compressor of patent document 1 and the ring of encirclement annular valve seat surface The shape of shape sealing surface is unrelated and be certain with the position of circumference.Here, when the compressed air of high pressure to be obtained, act on valve Pressure differential become big, the deformation quantitative change in the open side of valve and fixing side valve is big.At this moment, the reciprocating motion of patent document 1 The exhaust outlet of compressor can not become the shape of the deformation following valve, and therefore sealing reduces.Therefore, patent document 1 is reciprocal Motion compresses machine is when obtaining the compressed air of extra-lnigh tension, and compressed air is from the exhaust chamber lateral compression room side of cylinder adverse current And compression efficiency can not be improved.

In view of the above problems, it is an object of the invention to provide a kind of compressor, improve valve and be vented (air-breathing) mouth Sealing, suppresses compressed-air actuated adverse current and improves compression efficiency.

For solving the technical scheme of problem

For solving above-mentioned problem, the present invention provides a kind of compressor, compresses fluid by motor-driven piston Reciprocating compressor, it is characterised in that include: be provided with the valve of the mouth passing through for fluid with the reciprocating motion of described piston Seat board；With the valve being located at described seat board and carry out described mouth opening and closing, in the side contacting with described valve of described seat board Face on be formed with the central part towards described mouth and go and the inclined plane of step-down.

Invention effect

According to the present invention, provide a kind of compressor, improve valve and the sealing of exhaust (air-breathing) mouth, suppress compressed-air actuated Adverse current simultaneously improves compression efficiency.

Brief description

Fig. 1 is the sectional view (top dead centre) of the compression unit of the compressor of the embodiment of the present invention.

Fig. 2 is the sectional view (lower dead center) of the compression unit of the compressor of the embodiment of the present invention.

Fig. 3 is the seat board of the compressor of the embodiment of the present invention and the detailed of valve is schemed.

Fig. 4 is the sectional view of the compressor of the embodiment of the present invention.

Fig. 5 is the seat board of the compressor of variation of the present invention and the detailed of valve is schemed.

Detailed description of the invention

Below, use Fig. 1-Fig. 5 illustrates the embodiment of the compressor of the present invention.

The unitary construction using the reciprocating compressor to the present embodiment for the Fig. 4 illustrates.

In being located at cylinder 11, reciprocating piston 21 is by the discoideus guard ring being fastened by bolt 23 and connecting rod 22 (retainer) 24 are constituted.

Cylinder 11 is connected with crankcase 1.Crankcase 1 receives the driving sources such as motor, and piston 21 is via eccentric shaft the 3rd, bearing 4 It is connected with the rotary shaft 2 of motor.During motor-driven, rotary shaft 2 rotates, and turns the rotary motion of rotary shaft 2 via bearing 4 It is changed to the eccentric motion of eccentric shaft 3.With the eccentric motion of eccentric shaft 3, the piston 21 being connected with eccentric shaft 3 is in cylinder 11 Move and move back and forth.By piston 21 in cylinder 11 dynamic and move back and forth, the fluid such as compressed air.

The flange ring 25 of the outer circumferential side being located at dynamic piston 21 uses resin material to be formed as ring-type.In addition, flange ring 25 Clamped by connecting rod 22 and guard ring 24, and fix with the state being fastened by bolt 23.In addition, flange ring 25 is in the inner circumferential of cylinder 11 Face keeps the magnitude of interference to slip.Flange ring 25 is with the dynamic and scalable footpath of dynamic piston 21, by between piston 21 and cylinder 11 Seal.

The seat board 14 being fixed between cylinder 11 and cylinder head 12 is provided with exhaust outlet 17.In addition, utilize bolt 19 The valve 18 of the fixing opening and closing exhaust outlet by pressure differential on seat board 14.

The action using Fig. 1, Fig. 2 past multiplicity compressor to the present embodiment illustrates.

Generally, valve 18 contacts with seat board 14, and exhaust outlet 17 becomes closed mode.As it is shown in figure 1, in compression section, Piston 21 rises in cylinder 11, and pressure within cylinder 11 rises and when the two-way pressure difference of valve 18 becomes big, valve 18 is by jack-up And leave from seat board 14, exhaust outlet 17 becomes open mode.At this moment, air is vented from discharge chambe 7 to exhaust chamber 6, air quilt Compression.

In addition, as in figure 2 it is shown, in air-breathing operation, piston 21 declines in cylinder 11, the pressure within cylinder 11 reduces And the two-way pressure difference of valve 18 is when diminishing, valve 18 is pressed against seat board 14, and exhaust outlet 17 becomes closed mode.So, air Will not from exhaust chamber 6 to discharge chambe 7 countercurrently.

With the reciprocating motion of piston 21, exhaust outlet carries out opening and closing by valve 18, and the air sucking in air-breathing operation exists From cylinder to the vessel delivery with external connection in deairing step, thus compressed air.

The shape using the seat board to the present embodiment for the Fig. 3 illustrates.

For example, when air-breathing operation, in exhaust chamber 6 side (being configured with upside during valve 18 on seat board 14) of valve 18 Pressure high, in the case that the pressure of discharge chambe 7 side (being configured with downside during valve 18 on seat board 14) is low, act on valve The pressure differential of 18 becomes big, valve 18 and seat board 14 forced contact, thus valve 18 deforms.At this moment, to deform in view of valve 18 Shape and when not forming seat board 14, gap can be formed between valve 18 and seat board 14, the sealing of exhaust outlet 17 reduces.

Here, valve 18 is the fixing end being secured one end by bolt 19, the other end is open open end.Exhaust outlet 17 weeks The deformation of the valve 18 on limit is different according to the circumference difference of exhaust outlet 17.Specifically, as it is shown on figure 3, the open side of valve 18 The deformation angle β of the deformation angle α of 18a and fixing side 18b is α ＞ β relation.That is, from open end more close to then its deformation angle Bigger, close to fixing end, then its deformation angle is less.

Therefore, in the present embodiment, the face of the side contacting with valve 18 of seat board 14 is arranged rake 14a and shape Become inclined plane.Valve 18 be configured to compared with seat board 14 top when, inclined plane be formed as with exhaust outlet 17 near and become Low.

Chamfering when inclined plane is formed not as exhaust outlet 17 is implemented, but such as above-mentioned, in order to make with keeping width Valve 18 and seat board 14 contact and improve what sealing was formed, therefore, different according to valve 18 and seat board size etc., tilt The inclination angle in face is formed below with 10 °.

In addition, in order to improve sealing further, the deformation with valve 18 is corresponding, make inclined-plane according to circumferential position Inclination angle is different.Specifically, the rake 14a of seat board 14 makes big (the fixing end of α) in inclination angle of the open side of valve 18 The shape at the inclination angle little (β) of side.That is, bigger from Yue Jin inclination angle, open end, from fixing end more close to inclination angle less.

Here, by the height of radial outside and the radially inner side observed from the center of exhaust outlet 17 of rake 14a it Difference is set to h, when the radical length of rake is set to r, the ratio h/r of h with r is different and different according to circumferential position.At this moment, from The open end of valve 18 more near then h/r value is bigger, from fixing end more close to then h/r value less.

The inclination angle (α) of rake and (β) and be expected that by simulation or measurement than h/r, it is considered to the deflection of valve 18 and close Envelope property determines respectively.But it is also possible to be independently set to inclination angle and the position than h/r and circumference of rake certain Value, owing to valve 18 and seat board 14 keep width to contact, so sealing can be improved.

Thus, the shape of seat board 14 is corresponding with the deformation of valve 18, therefore, will not circumferentially occur small on valve 18 Rise and fall and the deformation such as gauffer, the face pressure distribution of the contact site of valve 18 and seat board 14 valve 18 as shown in Figure 3 and seat board 14 that Sample can reduce seat board 14 and the gap of valve 18 throughout all-round with the contact of certain width (becoming face contact).Therefore, in air-breathing work In sequence, can be effectively prevented from exhaust chamber 6 to the adverse current of discharge chambe 6, exhaust performance can be made to improve.

In addition, the deformation (protuberance) of fixing one end side portion 18c of valve 18 diminishes, can reduce answering that this part occurs Power.Therefore, it is possible to the thickness of thinning valve 18, the sound that valve 18 can beat seat board 14 suppresses less, can will compress Noise suppression during machine operating must be less.

In addition, in the present embodiment, the rake 14a of seat board 14 is configured to connect swimmingly relative to circumferencial direction. The deflection of the 18 of valve changes relative to circumferentially continuous, therefore, corresponding, the rake 14a's of seat board 14 The ratio h/r of inclination angle h and r also changes continuously, thereby, it is possible to more efficiently prevent from from exhaust chamber 6 to discharge chambe 6 is inverse Stream, it is possible to increase exhaust performance.

In the present embodiment, the shape of the seat board 14 of exhaust outlet 17 side is illustrated, but, for air entry The shape of the seat board of side is also set to same composition, thereby, it is possible to improve the sealing of valve and air entry, it is possible to increase compression Performance.

Additionally, in the present embodiment, seat board 14 is formed with plane rake 14a, but, rake 14a May not be plane but curved.At this moment, by the radial outside observed from the center of exhaust outlet 17 of rake 14a Be set to h with the difference of the height of radially inner side, the radical length of rake is when being set to r, and the ratio h/r of h and r is according to circumferential position not Different together.Bigger closer to then h/r from the open end of valve 18, less closer to then h/r from fixing end.

In addition, in the present embodiment, seat board 14 is formed with rake 14a, but it is also possible to be set to stage portion Replace rake 14a.As it is shown in figure 5, arrange multiple stage portion 14b on seat board 14, will see from the center of exhaust outlet 17 (step has multistage in Figure 5, so being place the highest and minimum ground for the radial outside examined and the difference of the height of radially inner side The difference in height of side) be set to h, the radical length of stage portion is set to r, and (step is multistage in Figure 5, so being from the nearest ground of mouth Square and farthest local difference) when, the ratio h/r of h and r is different according to circumferential position.From the open end of valve 18 more close to then h/r is more Greatly, from fixing end more close to then h/r less.

Further, since stage portion 14b is provided with multiple rank, so the corner 14c of the step of valve 18 and seat board 14 and circumference Shape linear contact lay, forms multiple linear contact lay.Thus, the path of seepage can form multiple minim gap, therefore, pass through labyrinth Effect, in air-breathing operation, can be effectively prevented the adverse current (seepage) from exhaust chamber 6 to discharge chambe 6, it is possible to increase venting quality Energy.

Even if additionally, h/r is not set to necessarily by circumferential position, it is also possible to form multiple linear contact lay, it is possible to increase Sealing.

In addition, in the present embodiment, it is also possible on seat board, form the structure being combined with rake and stage portion.

As above, according to the present embodiment, at metal at valve 18 and seat board 14 forced contact, in the case that valve 18 deforms, logical Cross the gap reducing between valve 18 and seat board 14, it is also possible to make sealing improve, can effectively prevent compressed-air actuated adverse current, Improve exhaust performance.

So far the case that embodiment described embodies when all only representing and implement the present invention, the technology of the present invention Scope is not by these limited interpretations.That is, the present invention can be with respectively in the case of without departing from its technological thought or its principal character The form of kind is implemented.

Description of reference numerals

1 crankcase

2 axles

3 eccentric shafts

4 bearings

5 hammers

6 exhaust chambers

7 discharge chambes

11 cylinders

12 cylinder head

14 seat boards

14a rake

17 exhaust outlets

18 valves

The open side of 18a valve

Side fixed by 18b valve

19 bolts

21 pistons

22 connecting rods

23 bolts

24 guard rings

25 flange rings

Open side deformation angle (exhaust port side angle of inclination) of α valve

Side deformation angle (exhaust port side angle of inclination) fixed by β valve.

Claims

1. the compressor being compressed fluid by motor-driven, it is characterised in that include:

It is provided with the seat board of the mouth passing through for described fluid；With

It is located at described seat board and carry out the valve of opening and closing to described mouth,

The face of the side contacting with described valve of described seat board is formed central part towards described mouth go and step-down Inclined plane.

2. compressor according to claim 1, it is characterised in that:

The inclination angle of described inclined plane is different according to circumferential position difference.

3. compressor according to claim 2, it is characterised in that:

The inclination angle of the described inclined plane of the part close to the open end of described valve is more than the institute of the part away from described open end State the inclination angle of inclined plane.

4. compressor according to claim 2, it is characterised in that:

The inclination angle of described inclined plane changes continuously.

5. a compressor, is the reciprocating compressor being compressed fluid by motor-driven piston, it is characterised in that bag Include:

It is provided with the seat board of the mouth passing through for fluid with the reciprocating motion of described piston；With

The face of the side contacting with described valve of described seat board is formed central part towards described mouth go and step-down Rake or multiple stage portion.

6. compressor according to claim 5, it is characterised in that:

The difference in height of described rake or the radial direction of multiple stage portion is set to h, radical length is when being set to r, and h/r is according to circumference Position is different and different.

7. compressor according to claim 6, it is characterised in that:

Difference in height h of the radial direction of the described rake of the part close to the open end of described valve or described stage portion and radical length The ratio h/r of r more than the described rake of part away from described open end or the radial direction of described stage portion difference in height h with radially The ratio h/r of length r.

8. compressor according to claim 5, it is characterised in that:

Described rake is formed of flat or curved surface.

9. compressor according to claim 6, it is characterised in that:

The ratio h/r of difference in height h of the radial direction of described rake or described stage portion and radical length r changes continuously.