CN100510406C

CN100510406C - Suction valve fixing apparatus for reciprocating compressor

Info

Publication number: CN100510406C
Application number: CNB031302025A
Authority: CN
Inventors: 宋桂永
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: Taizhou LG Electronics Refrigeration Co Ltd
Priority date: 2003-06-17
Filing date: 2003-06-17
Publication date: 2009-07-08
Anticipated expiration: 2023-06-17
Also published as: CN1566655A

Abstract

The invention relates to a suction valve fixing device of reciprocating compressor, comprising a piston, a suction valve and a fixing device of suction valve, and a screw fixing device also can be arranged. The piston is linked to the rotor of the reciprocating engine, and a gas flow path made of suction flow path and a suction mouth is arranged for fluid passing, and makes straight reciprocating motion in the cylinder for sucking and compressing fluid. The suction valve is mounted on the front end of the piston and switching the suction mouth with the reciprocating motion of the piston. The fixing device of suction valve has a head capable of hanging the suction valve, and can be insert into the valve fixing part slot on the front center of the suction valve and jointed fixed for supporting the suction valve. The screw joint part in the screw fixing part is fixed in the screw fixing part slot on the front center of the piston. The invention can reduce production cost.

Description

The suction valve fixing device of reciprocal compressor

Technical field

The suction valve fixing device of reciprocal compressor of the present invention, be about suction valve being fixed on the reciprocal compressor suction valve fixing device on the piston, particularly about in the dbl act compressor when reducing original cost piston formed with the sheet metal operation, also can stably be fixed on reciprocal compressor suction valve fixing device on the piston to suction valve.

Background technique

Generally, compressor is that the piston linear motion also sucks, pressurized gas.Such reciprocal compressor roughly be divided into rotatablely moving of drive motor converted to the to-and-fro motion of piston and suck, the mode of pressurized gas, the drive motor straight reciprocating motion make its reciprocating motion of the pistons and suck, the mode of pressurized gas.

Fig. 1 is an existing embodiment's of reciprocal compressor a sectional arrangement drawing.As shown in the figure, existing reciprocal compressor is the shell 10 that is provided with communicatively by sucking pipe SP and outlet pipe DP, the bracket component 20 of shell 10 inside, the compression assembly 40 that is fixed on the bracket component 20 and the reciprocal electrodynamic machine 30 of its mover 33 straight reciprocating motions is connected on the reciprocal electrodynamic machine 30 and is supported by bracket component 20, to the mover 33 of the reciprocal electrodynamic machine 30 of moving direction elasticity support and guide the resonant spring assembly of resonance motion, to the mover 33 of the reciprocal electrodynamic machine 30 of moving direction elasticity support and guide the resonant spring assembly of resonance motion to constitute.

Compression assembly 40 is to be connected and pistons reciprocating 42 in the compression volume P of cylinder 41 by the mover 33 of the cylinder 41 that is fixed on 20 li of bracket components with reciprocal electrodynamic machine 30, be installed in the front end of piston 42 and open and close the suction passage of piston 42 and control the suction valve 43 that cold media air flows into, the discharge that is installed in cylinder 41 is pulled and is opened and closed compression volume P and control the expulsion valve 44 that pressurized gas flows out and constitute.

Piston 42 within it portion to the piston motion direction connect be formed with the gas suction pipe SP of casing 10 together with suction passage 42a, and on the outlet side terminal of suction passage 42a, be formed with one or two or three the suction port 42b that open and close by suction valve 43 to deflection on one side.

And, for suction valve 43 usefulness connecting screw B are fixed on the piston 42, are formed with in the front end central authorities of piston 42 and make connecting screw B press the fixedly connecting groove 42c of suction valve 43.

Suction valve 43 forms with Tai Ji apperance cutting, and the one side forms sealed department 43a for the suction port 42b that opens and closes piston 42, and central position is formed with connecting screw B and is fixed on fixing part 43b on the piston.

The central authorities of fixing part 43b are formed with the through hole 43c that connecting groove 42c with piston is corresponding and connecting screw B is connected.

Unaccounted symbol 21 is the place ahead supports among the figure, the 22nd, and intermediate support, the 23rd, the rear support, 31 and 32 is outer stator and inside stator, 51 and 52 is front side resonant spring and rear side resonant spring.

As follows as above-mentioned existing past dbl act compressor operation: both, if back and forth 30 li importings of electrodynamic machine power supply makes between its outer stator 31 and the inside stator 32 and forms magnetic field, the mover 33 that is installed in space between outer stator 31 and the inside stator 32 continues to-and-fro motion along the direction rotation of the magnetic line of force and by resonant spring, meanwhile piston 42 is in cylinder 41 reciprocates inside and change the volume of compression volume P, carries out repeatedly sucking in compression volume P, compression, discharges a succession of process of cold media air.

At this moment, suction valve 43 opens and closes suction port 42b by the pressure difference between its both sides suction passage and the compression volume and makes cold media air be drawn into compression volume P along the running direction of piston 42.

But, as above-mentioned existing in the dbl act compressor piston 42 make with casting manipulations usually, but this casting manipulations not only expense is expensive, and because therefore the position that needs precision machining to contact with suction valve 43 has the required too much problem of all operating costs.If make piston 42 with the sheet metal operation, though can reduce original cost greatly, with connecting screw B fixedly during suction valve 43, because the thin thickness of piston nose, its result has the very difficult firmly fixedly shortcoming of suction valve 43 at the front end of piston 42 in order to solve this point.

Summary of the invention

The present invention is provided at when making piston with the sheet metal operation in order to solve problem points invention that above-mentioned existing reciprocal compressor has, to its objective is, firmly fixedly the reciprocal compressor suction valve fixing device of suction valve.

In order to reach purpose of the present invention, provide (adding new claim): a kind of suction valve fixing device of reciprocal compressor, include: piston, suction valve, the suction valve fixed component, piston is connected the mover of reciprocal electrodynamic machine, and for making fluid by possessing gas flow path by suction passage and suction port, it is characterized in that being formed with suction passage 111 in piston 110 central part perforation within it, the a plurality of suction ports 112 of equidistant formation on the same circumference at the outlet side terminal part edge of suction passage 111, outer side surface central authorities at piston 110 front ends are formed with valve fixed component insertion groove 113, through hole 121 guide portion 132 that can be by suction valve fixed component 130 is also corresponding with valve fixed component insertion groove 113, through hole 121 and valve fixed component insertion groove 113 are as one man corresponding, the guide portion 132 of suction valve fixed component 130 is by behind the through hole 121 of suction valve 120, be clipped in 113 li of valve fixed component insertion grooves, suction valve fixed component 130 is engaged or utilize tackiness agent firmly to be bonded on 113 li formations of valve fixed component insertion groove.

The suction valve fixing device of described reciprocal compressor, its feature are that also the guide portion 132, valve fixed component insertion groove 113 of above-mentioned through hole 121, suction valve fixed component 130 are with the tabular formation of circle.

The suction valve fixing device of described reciprocal compressor, its feature are that also above-mentioned suction valve 120 is use the formation of strong elasticity material circular tabular

The suction valve fixing device of described reciprocal compressor, its feature is that also above-mentioned suction valve fixed component 130 is made of suction valve fixing part head 131 and guide portion 132, and the diameter of suction valve fixing part head 131 is bigger than the through hole 121 of above-mentioned suction valve 120; And the diameter of 131 guide portion 132 that axially prolong is littler than the internal diameter of above-mentioned through hole 121 from the head.

The suction valve fixing device of described reciprocal compressor, its feature are also that the length of guide sections 132 will form makes head 131 be close to length on the piston 110.

The suction valve fixing device of reciprocal compressor according to claim 1, its feature are also that guide sections 132 is inserted in and fix with methods such as diffusion bond or welding or brazings behind 113 li of the valve fixed component insertion grooves or utilize tackiness agent 140 firmly fixing.

The suction valve fixing device of described reciprocal compressor, its feature also is to be formed with valve fixed component insertion mouth 213 at the front end of aforesaid piston 110, and the valve fixed component insert mouthfuls 213 li possess have the screw of nut portions 241 fixed component 240 with juncture with tackiness agent 250 engage fixing after, possess 241 li of the nut portions that have the suction valve of screw section 232a fixed component 230 to tangle suction valve 220 and be engaged on screw fixed component 240, thereby be fixed on the piston 210.

The suction valve fixing device of described reciprocal compressor, its feature also are to be formed with lip part 242 on the aforesaid screw fixed component 240, and the valve fixed component that engages with lip part 242 inserts mouthful 213 terminal, peripheral 213a of portion that should a section difference landform be in depression

According to the suction valve fixing device of reciprocal compressor of the present invention fixedly the suction valve fixed component of suction valve or the screw fixed component that meshes above-mentioned suction valve fixed component are fixed on the piston in the mode that engages on the piston, so even the thin thickness of piston also can be fixed up suction valve with other fixed component, and can make piston with the cheap sheet metal operation of expense by these, so can reduce operating cost.

Description of drawings:

Fig. 1 is the sectional arrangement drawing of an example of existing reciprocal compressor.

Fig. 2 is the exploded perspective view of existing reciprocal compressor suction valve fixing device.

Fig. 3 is the sectional arrangement drawing of existing reciprocal compressor suction valve fixing device.

Fig. 4 is reciprocal compressor suction valve fixing device the 1st an embodiment's of the present invention sectional arrangement drawing.

Fig. 5 is reciprocal compressor suction valve fixing device the 1st an embodiment's of the present invention exploded perspective view.

Fig. 6 and Fig. 7 are the sectional arrangement drawings of diagram reciprocal compressor suction valve fixing device motion state of the present invention.

Fig. 8 is reciprocal compressor suction valve fixing device the 2nd an embodiment's of the present invention sectional arrangement drawing.

Sectional arrangement drawing.

Fig. 9 is diagram reciprocal compressor suction valve fixing device the 2nd an embodiment's of the present invention branch oblique solution

View.

The explanation of reference numeral:

110: piston 111: suction passage

112: suction port 113: valve fixed component insertion groove

120: suction valve 121: through hole

130: suction valve fixed component 131: suction valve fixed component head

132: guide portion 140: tackiness agent (perhaps joining portion)

240: screw fixed component 241: nut portions

Embodiment

Below, describe suction valve fixing device in detail according to illustrated the 1st embodiment in the annex drawing according to reciprocal compressor of the present invention.

As Fig. 4, Fig. 5, Fig. 6, the present invention shown in Figure 7 by on the rotor that is connected reciprocable machine and in the reciprocates inside of cylinder and suck, the piston of compression refrigerant gas, be installed on the piston and open and close the suction valve of above-mentioned piston gas stream, the suction valve fixed component that connects suction valve and be fixed on piston nose constitutes.

Piston 110 among Fig. 3 and Fig. 4 is there being certain thickness sheet metal to form the drum of main wall portion and front end same thickness with mould compacting back.

And, piston 110 as at Fig. 4 and shown in Figure 5, portion forms a promising formation gas flow path part and the suction passage 111 that axially connects within it, and is formed with the suction port 112 that is opened and closed and constituted the gas flow path remainder by suction valve 120 in the outlet side terminal of suction passage 111.

Suction passage 111 connects the piston central parts, and suction port 112 is in order all to be communicated with suction passage 111, on the same circumference of front-end edge equidistant formation a plurality of, be 4 among the figure.

And in order to insert guide portion 132 terminals of fixing above-mentioned suction valve fixed component 130, the central authorities of the suction port 112 both outer side surface central authorities of front end are formed with valve fixed component insertion groove 113.

Suction valve 120 among Fig. 4 and Fig. 5 is use the formation of strong elasticity material circular tabular, and its central part is formed with through hole 121, and through hole can be by suction valve fixed component 130 guide portion 132 and form with the raw sheet apperance with valve fixing part matter that (make into: and the guide portion 132 of through hole 121, suction valve fixed component 130, suction valve fixed component 130, valve fixed component insertion groove 113 be with the tabular formation of circle, and through hole 121 can pass through the guide portion 132 of suction valve fixed component 130 and corresponding with valve fixed component insertion groove 113.

And, suction valve 120 is that fluid is drawn between the inner peripheral surface of the outer circumferential face of above-mentioned suction valve 120 and corresponding therewith cylinder 41 when the suction stroke of piston 110, forms the diameter littler than the external diameter of piston 110 in the scope of all blocking whole suction ports 112.

Among Fig. 4 and Fig. 5 130 is diagram suction valve fixed components, and suction valve fixed component 130 forms the screw apperance that does not have the screw section.For tangling suction valve 120, its diameter is bigger than the through hole 121 of above-mentioned suction valve 120 when suction valve 120 is opened for suction valve fixed component head 131; And 131 guide portion that axially prolong 132 121 li of through holes being inserted in suction valve 120 for sliding from the head, its diameter is littler than the internal diameter of above-mentioned through hole 121.

Guide portion 132 can form and make head 131 be close to length on the piston 110.But as present embodiment, when piston 110 to-and-fro motion for making suction valve 120 with the certain interval to-and-fro motion, the length that the length of guide portion 132 is added up with valve fixed component insertion groove 113 degree of depth than suction valve 120 thickness is big, and this is because consider the elasticity of suction valve 120.

And guide portion 132 is inserted in fixes with methods such as diffusion bond or welding or brazings behind 113 li of the valve fixed component insertion grooves or utilizes tackiness agent 140 firmly fixing.

Identical with existing structure in the drawings part has been used identical symbol.Unaccounted symbol 44 is expulsion valves among the figure.

As follows as above-mentioned suction valve assembly assembling of the present invention: promptly, place suction valve 120 at the front end of piston 110, and the valve fixed component insertion groove 113 of the through hole 121 of suction valve 120 central parts and piston 110 as one man to last.

Afterwards, the guide portion 132 of suction valve fixed component 130 is by behind the through hole 121 of suction valve 120, be clipped in 113 li of valve fixed component insertion grooves, with methods such as diffusion bond or welding or brazings suction valve fixed component 130 engaged then or utilize other tackiness agent 140 firmly to be bonded on 113 li of valve fixed component insertion grooves.

The switching process of suction valve is as follows in the present invention: promptly, as shown in Figure 6, if piston 110 is laggard for carrying out suction stroke, suction valve 120 is owing to be subjected to pressure difference between gas flow path pressure and the compression volume P pressure is opened piston 110 along guide portion 132 slips of suction valve fixed component 130 each suction port 112.At this moment the head 131 of suction valve fixed component 130 is hung suction valve 120 and is being opened suction valve 120 and prevent that suction valve 120 breaks away from away from piston 110 fully.

In this process, flow into compression volume P by the space between the inner peripheral surface of suction valve 120 and piston 110 through the suction passage 111 of piston 110 and the cold media air of suction port 112.

Secondly, if piston 110 advances in order to carry out compression stroke, suction valve 120 because be subjected to pressure difference between above-mentioned two space gas flow paths and the compression volume and the inertia of valve along the guide portion 132 of suction valve fixed component 130 to moving in the other direction and the suction port 112 of closure piston 110.

And, the 2nd embodiment according to the suction valve fixing device toward the dbl act compressor of the present invention is as follows: the front end of piston 110 is formed with valve fixed component insertion groove 113 in aforesaid the 1st embodiment, and 113 li insertion suction valves of valve fixed component insertion groove fixed component 130 is fixed in the mode that engages.But in the 2nd embodiment, substitute above-mentioned valve fixed component insertion groove and be formed with valve fixed component insertion mouth 213, and the valve fixed component insert mouthfuls 213 li possess have the screw of nut portions 241 fixed component 240 with juncture with tackiness agent 250 engage fixing after, possess 241 li of the nut portions that have the suction valve of screw section fixed component 230 to tangle suction valve 220 and be engaged on screw fixed component 240, thereby be fixed on the piston 210.

Here, for the valve fixed component that screw fixed component 240 and screw fixed component 240 are engaged inserts mouthful 213 expansion sealing areas, be formed with lip part 242 on the screw fixed component 240, and the valve fixed component that engages with lip part 242 inserts mouthful 213 terminal, peripheral 213a of portion that should a section difference landform be in depression.Unaccounted symbol 211 is suction passages among the figure, the 212nd, and suction port, the 221st, through hole, the 231st, head, the 232nd, guide portion, 232a is the screw section.Because the operation and above-mentioned the 2nd embodiment of present embodiment are similar, so omitted detailed description.

Like this, when piston is made with the sheet metal operation, fixedly the piston nose thickness of suction valve can not be thick especially, but on above-mentioned front end fixedly the suction valve fixed component of suction valve or the screw fixed component that connects above-mentioned suction valve fixed component with diffusion or welding, the method of brazing engages or is fixed on the piston with adhesive bond, so piston can be made with the sheet metal operation.So required expense reduces fabricating cost in the time of reducing the making piston by these.

And, owing to form suction port to the four directions, so even the extent of opening of suction valve rotation suction port is all identical.Therefore cold media air always flows into identical amount, so can improve the consistency of compressor efficiency.

Claims

1, a kind of suction valve fixing device of reciprocal compressor, include: piston, suction valve, the suction valve fixed component, piston is connected the mover of reciprocal electrodynamic machine, and for making fluid by possessing gas flow path by suction passage and suction port, it is characterized in that the front end at aforesaid piston (210) is formed with the valve fixed component insertion mouthful (213) of depressed part (213a), the valve fixed component inserts mouthful (a 213) lining and is provided with screw fixed component (240), be provided with nut portions (241) in the screw fixed component (240), the outer top of screw fixed component (240) is formed with lip part (242), screw fixed component (240) engages with tackiness agent (250) with juncture and is fixed in the valve fixed component insertion mouthful (213), possess nut portions (241) lining that the screw section the is arranged suction valve fixed component (230) of (232a) tangles suction valve (220) and is engaged on screw fixed component (240), thereby be fixed on the piston (210).