CN100383391C - Connecting rod connection structure for sealed compressor - Google Patents
Connecting rod connection structure for sealed compressor Download PDFInfo
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- CN100383391C CN100383391C CNB031302521A CN03130252A CN100383391C CN 100383391 C CN100383391 C CN 100383391C CN B031302521 A CNB031302521 A CN B031302521A CN 03130252 A CN03130252 A CN 03130252A CN 100383391 C CN100383391 C CN 100383391C
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- bent axle
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Abstract
The present invention relates to a connection structure for a connecting rod of a closed compressor. The present invention comprises a crankshaft (30) which can rotate through a driving device and is provided with an eccentric pin (32) at the eccentric position of the rotation center, and a connecting rod (40) of which one end is connected with the eccentric pin (32) and the other end is connected with a ball joint (42), and a piston (54) connected with the ball joint (42) of the connecting rod (40), wherein after receiving the driving force of the crankshaft (30), the piston (54) can make straight reciprocating motions in a compression chamber (52); parallel to the direction of the straight reciprocating motion of the piston (54), the rotation center of the ball joint (42), and the rotation center of the crankshaft (30) offsets for certain space. The present invention has relative compressor input and can obtain larger output, so the present invention has the advantages that the present invention can improve the driving efficiency of compressors, reduce the abrasion between the piston and the side wall of the compression chamber, and reduce noise.
Description
Technical field
The invention belongs to compressor field and relate to a kind of connecting rod linkage structure of hermetic motor compressor, particularly connect the connecting rod linkage structure of the hermetic motor compressor of piston and bent axle about the connecting rod that uses an end connecting ball-joint.
Fig. 1 represents the hermetic motor compressor internal structure sectional drawing according to conventional art.At first closed container (1) is to constitute with upper container (1t) and bottom container (1b), and portion forms enclosed space within it.The inside of above-mentioned closed container (1) is provided with framework (2).At the bottom fixed stator (3) of said frame (2), said stator (3) is supported on the inside of closed container (1) by spring (2S).The rotor (4) that carries out electromagnetic interaction with stator (3) and rotate is arranged in the inside of said stator (3).The bent axle (5) of above-mentioned rotor (4) and the central axis hole of perforation said frame (2) forms as one and rotates.
The lower end of above-mentioned bent axle (5) is equipped with the inlet port (5d) that can upwards extract machine oil (e) by bent axle inside out.Machine oil (e) by above-mentioned inlet port (5d) forms eccentric cam pin (5b) through oil pipe (5a) at the gyration center of bent axle (5) relatively and locates to disperse.The opposite place of formation cam pin (5b) has and bent axle (5) becomes one, and adjusts the statocone (5c) of the center of gravity off-centre of cam pin (5b) generation.
In addition, the cam pin (5b) of above-mentioned bent axle (5) is connecting an end of connecting rod (8).The other end of connecting rod (8) is connecting piston (7), thereby the rotation motion of above-mentioned bent axle (5) is converted to the straight reciprocating motion of piston (7).Do straight reciprocating motion in the pressing chamber (6) of the cylinder (6) that above-mentioned piston (7) is equipped with and come compression working fluid in framework (2).Pressing chamber (6) the front end assembling valve member (9) and the top cover (10) of above-mentioned cylinder (6).Absorbing silencer (11) is assembled on the above-mentioned top cover (10), absorbing silencer (11) suck by the sucking pipe (12) that connects closed container (1) and reduce the noise of working fluid after supply to pressing chamber.Symbol among the figure (13) is an outlet pipe, has the working fluid that compression back in above-mentioned pressing chamber (6) is discharged and supplies to outside effect.
Its running is: give the compressor power supply have with above-mentioned formation, make rotor (4) and the electromagnetic interaction of stator (3) under rotate, also rotate with the bent axle (5) of above-mentioned rotor (4) one thereupon.When bent axle (5) rotated, the track that forms eccentric cam pin (5b) rotation with bent axle (5) was circular.
Thereby, make in the connecting rod (8) that is connected above-mentioned cam pin (5b) and the process of cam pin (5b) interlock and do straight reciprocating motion in the pressing chamber (6) of piston (7) in cylinder (6) that is connected the other end and come compression working fluid.By said process, compressed working fluid is discharged through the outlet pipe (13) of cylinder (6).
Above-mentioned piston (7) and connecting rod (8) have following Placement: as shown in Figure 2, at an end of connecting rod (8) the ball wheel (8b) that becomes one is arranged, the inner ball groove (7h) that forms in above-mentioned piston (7) rear end.Above-mentioned ball groove (7h) is formed in the inside of above-mentioned piston (7), and make above-mentioned ball wheel (8b) within it portion freely rotate.
But, as mentioned above, there are the following problems in the connecting rod linkage structure according to conventional art: in the formation that Fig. 2 represents, the gyration center of above-mentioned ball wheel (8b) and the gyration center of bent axle (5) are positioned on piston (7) center line, thereby, under the state as shown in Figure 2, above-mentioned piston (7) is carried out in the process of compression stroke, and bigger side force acts on a sidewall of piston (7).Above-mentioned connecting rod (8) pushed to that the power (F) of stating piston (7) is divided into the component (Fy) of piston (7) travel direction and during with the component (Fx) of its orthogonal direction, this side force corresponding to the component (Fx) of the orthogonal direction of piston (7) travel direction.
The result, above-mentioned in the prior art side force, promptly relatively large with the component (Fx) of the orthogonal direction of piston (7) travel direction, therefore, the necessary input of Driven Compressor is risen, the heavy wear of piston (7) and pressing chamber (6) takes place in the part (A) that above-mentioned piston (7) contacts with pressing chamber (6) inwall in compression stroke, and the problem of the noise increase that produces in the work of making is arranged.
Summary of the invention
Therefore the objective of the invention is to solve aforesaid problem in the past, promptly in the compressor that uses ball-joint, minimize the side force between piston and pressing chamber.
Another object of the present invention is the noise that takes place in the minimum compressor work.
In order to reach aforesaid purpose, technological scheme of the present invention is: include in the present invention: rotate with drive unit, and be equipped with the bent axle of cam pin at the eccentric position of gyration center, one end is connecting above-mentioned cam pin, the other end is connecting the connecting rod of ball-joint, be connected with the ball-joint of above-mentioned connecting rod in addition, accept the driving force of above-mentioned bent axle and the piston of doing straight reciprocating motion in pressing chamber constitutes.The gyration center of above-mentioned ball-joint and the gyration center of bent axle are being parallel to the certain distance of straight line back and forth movement direction hour offset of above-mentioned piston.
The gyration center of above-mentioned ball-joint is positioned on the length direction center line of above-mentioned piston, the gyration center of above-mentioned bent axle is to be positioned between the length direction center line and above-mentioned pressing chamber one sidewall of above-mentioned piston, and on parallel hypothesis line by above-mentioned piston length direction center line.
The connecting rod linkage structure that has the hermetic motor compressor that as above constitutes according to the present invention has: by minimizing the side force between piston and pressing chamber inwall, the input of Driven Compressor is reduced, and can make the wearing and tearing between piston and pressing chamber inwall drop to minimum, the advantage that operating noise is also decreased.
Advantage and good effect: as above describe in detail, in the connecting rod linkage structure according to hermetic motor compressor of the present invention, when using ball-joint to connect the bar linkage structure of piston, connecting the gyration center skew certain distance of mind-set ball-joint in the crank up of connecting rod one end.
According to above structure, the power that conveys to piston by connecting rod in the compression stroke increases relatively, thereby can reduce the necessary input value of Driven Compressor, reaches the effect that improves compressor operating efficient.
And the power that is added to the pressing chamber sidewall by piston reduces relatively, therefore, can also reduce the wearing and tearing between piston and corresponding pressing chamber sidewall.
And, the reducing of the wearing and tearing between above-mentioned piston and pressing chamber sidewall, the noise that produces in the time of can minimum compressor work.
Description of drawings
Fig. 1 represents the hermetic motor compressor internal structure sectional drawing according to conventional art.
Fig. 2 represents the basis sectional drawing of the connecting rod linkage structure of ball-joint mode in the past.
Fig. 3 represents the connecting rod linkage structure section sketch map of the hermetic motor compressor of design according to the present invention.
Fig. 4 represents the power graph of a relation that piston in embodiments of the present invention bears in compression stroke.
Among each figure:
1: closed container, 1b: bottom container,
1t: upper container, 2: framework,
2s: spring, 3: stator,
4: rotor, 5: bent axle,
5a: oil pipe, 5b: cam pin,
5c: statocone, 5d: inlet port,
6: cylinder, 6: pressing chamber,
7: piston, 7h: the ball groove,
8: connecting rod, 8b: the ball wheel,
8: connecting rod, 9: valve member,
10: top cover, 11: absorbing silencer,
12: sucking pipe, 13: outlet pipe,
30: bent axle, 32: cam pin,
40: connecting rod, 42: ball-joint,
50: cylinder main body, 52: pressing chamber,
54: piston;
A: inwall contact segment, Fx: the component of orthogonal direction,
Fy: the component of travel direction, F: power,
E: machine oil, O.S: deviation post,
L: center line, L: the imaginary line of skew O.S position,
R: gyration center.
Specific embodiment
Below, the connecting rod linkage structure embodiment accompanying drawing of reference hermetic motor compressor of design according to the present invention is described in more details.
Fig. 3 represents the connecting rod linkage structure sectional skeleton diagram of the hermetic motor compressor of design according to the present invention.As shown in the figure, the bent axle (30) that rotates under the interaction of stator and rotor has the gyration center identical with rotor (R).Be equipped with cam pin (32) at bent axle (30) from the eccentric certain distance of gyration center (R).Thereby cam pin (32) is formed centrally the circular turned track in above-mentioned gyration center (R) being.Cam pin (32) is connected on the end of the following connecting rod that will illustrate (40).
Connecting rod (40) is connected with an end of cam pin (32).This end at above-mentioned connecting rod (40) is equipped with the big end warp of ring-type, makes it to entangle the outer cylinder of above-mentioned cam pin (32).The other end of above-mentioned connecting rod (40) is connecting ball-joint (42).
The pressing chamber (52) that compression working fluid is arranged in the cylinder main body (50) is provided with the piston (54) that can do the straight line back and forth movement in the pressing chamber (52).Piston (54) and connecting rod (40) are to interconnect with ball-joint (42).
In as above constituting, the rotation motion of bent axle (30) is the straight line back and forth movement that is converted to piston (54) by connecting rod (40), and passes through the straight reciprocating motion compression working fluid in pressing chamber (52) of piston (54).
And, have the gyration center of above-mentioned ball-joint (42) on above-mentioned piston (54) the length direction center line (L).Also promising make parallel with above-mentioned center line (L), center line (L) and and pressing chamber (52) internal face of piston (54) one sides between possess imaginary line (L), the gyration center of bent axle (30) is positioned on the above-mentioned imaginary line (L`).
That is, the gyration center of above-mentioned bent axle (30) is positioned on the imaginary line (L) of center line (L) the skew O.S. position by above-mentioned ball-joint (42) gyration center.
Below to describe the effect of the connecting rod linkage structure of the hermetic motor compressor with said structure of design in detail according to the present invention.
Above-mentioned piston (54) is accepted the rotatory force of bent axle (30) and do straight reciprocating motion in pressing chamber (52) by connecting rod (40), particularly move in the process of pressing chamber (52) upper dead center at piston (54), for making the inner working fluid of compression pressing chamber (52), connecting rod (40) will pass through ball-joint (42) to piston (54) afterburning (F).
This power (F), as shown in Figure 4, be divided into piston (54) travel direction component (Fy) and with the component (Fx) of piston (54) travel direction orthogonal direction, just piston (54) is added to the power of pressing chamber (52) inwall.
But, the gyration center of bent axle (30) is offset to the sidewall direction of piston (54) from the gyration center of ball-joint (42) in the present invention, when particularly piston (54) is carried out compression stroke, the component (Fy) of the travel direction of piston (54) increases relatively, and the component of orthogonal direction (Fx) reduces relatively therewith.
That is, during Driven Compressor turning crankshaft (30), the rotatory force of bent axle (30) conveys to piston (54) by connecting rod (40) in the present invention.At this moment piston (54) is done the straight line back and forth movement and is come compression working fluid in pressing chamber (52).The component (Fy) that conveys to piston (54) by connecting rod (40) in compression stroke relatively increases especially, and piston (54) reduces relatively to the component (Fx) that the sidewall of above-mentioned pressing chamber (52) adds.
Right of the present invention is to be not limited to illustrated embodiment in the above, and is defined in the content that is logged into the claim scope, can do various distortion and improvement the knowledgeable people in the field of the invention in being logged into the interest field of claim.
Claims (2)
1. the connecting rod linkage structure of a hermetic motor compressor, include: rotate and be connected above-mentioned cam pin with an end at the bent axle that the eccentric position of gyration center is equipped with cam pin with drive unit, the other end is connecting the connecting rod of ball-joint, also comprise with the ball-joint of above-mentioned connecting rod and being connected, accept the driving force of above-mentioned bent axle and in pressing chamber, do the piston of straight reciprocating motion, it is characterized in that: be offset certain distance through between the straight line of the straight reciprocating motion direction that is parallel to piston of the gyration center of above-mentioned ball-joint and straight line through the straight reciprocating motion direction that is parallel to piston of the gyration center of bent axle.
2. the connecting rod linkage structure of hermetic motor compressor according to claim 1, it is characterized in that: the gyration center of above-mentioned ball-joint is positioned on the length direction center line of above-mentioned piston, the gyration center of above-mentioned bent axle is to be positioned between the length direction center line and above-mentioned pressing chamber one sidewall of above-mentioned piston, and on the hypothesis line of parallel above-mentioned piston length direction center line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031302521A CN100383391C (en) | 2003-06-25 | 2003-06-25 | Connecting rod connection structure for sealed compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031302521A CN100383391C (en) | 2003-06-25 | 2003-06-25 | Connecting rod connection structure for sealed compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1566661A CN1566661A (en) | 2005-01-19 |
| CN100383391C true CN100383391C (en) | 2008-04-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031302521A Expired - Fee Related CN100383391C (en) | 2003-06-25 | 2003-06-25 | Connecting rod connection structure for sealed compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100383391C (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4517931A (en) * | 1983-06-30 | 1985-05-21 | Nelson Carl D | Variable stroke engine |
| US4979428A (en) * | 1989-05-30 | 1990-12-25 | Nelson Lester R | Reciprocating air compressor with improved drive linkage |
| US5531574A (en) * | 1994-02-28 | 1996-07-02 | Kabushiki Kaisha Toshiba | Closed-type compressor |
| CN2435560Y (en) * | 1999-12-03 | 2001-06-20 | 华中理工大学 | Energy-saving piston-connecting-rod mechanism |
-
2003
- 2003-06-25 CN CNB031302521A patent/CN100383391C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4517931A (en) * | 1983-06-30 | 1985-05-21 | Nelson Carl D | Variable stroke engine |
| US4979428A (en) * | 1989-05-30 | 1990-12-25 | Nelson Lester R | Reciprocating air compressor with improved drive linkage |
| US5531574A (en) * | 1994-02-28 | 1996-07-02 | Kabushiki Kaisha Toshiba | Closed-type compressor |
| CN2435560Y (en) * | 1999-12-03 | 2001-06-20 | 华中理工大学 | Energy-saving piston-connecting-rod mechanism |
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| Publication number | Publication date |
|---|---|
| CN1566661A (en) | 2005-01-19 |
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Granted publication date: 20080423 |