CN105464943A - Piston drive rod, piston cylinder assembly and compressor - Google Patents
Piston drive rod, piston cylinder assembly and compressor Download PDFInfo
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- CN105464943A CN105464943A CN201610044850.0A CN201610044850A CN105464943A CN 105464943 A CN105464943 A CN 105464943A CN 201610044850 A CN201610044850 A CN 201610044850A CN 105464943 A CN105464943 A CN 105464943A
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- Prior art keywords
- piston
- actuated bar
- piston actuated
- necking section
- section
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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
- F04B39/0005—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 adaptations of pistons
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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
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
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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
- F04B39/0005—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 adaptations of pistons
- F04B39/0022—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 adaptations of pistons piston rods
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
Abstract
The invention relates to the technical field of compressors, in particular to a piston drive rod, a piston cylinder assembly and a compressor. The first end of the piston drive rod is connected with a piston, the second end of the piston drive rod is connected with a piston drive device, and at least one section of necking part is arranged between the first end and the second end of the piston drive rod. When a piston bears radial force, the at least one section of necking part deforms so that the first end of the piston drive rod can deflect in the direction of the radial force. By means of the piston drive rod used for connecting the piston with the piston drive device, axial force can be transmitted. The at least one section of necking part with small radial rigidity is included so that matching errors, caused by design or machining assembly or the like, between the piston and a cylinder can be adjusted in a self-adaptation mode, and accordingly piston radial stress can be effectively reduced, and friction loss between the piston and the cylinder is reduced.
Description
Technical field
The present invention relates to Compressor Technology field, particularly a kind of piston actuated bar, piston cylinder assembly and compressor.
Background technique
Piston cylinder, generally include cylinder body and to be arranged in cylinder body and to coordinate the piston forming compression chamber with cylinder body, piston to-and-fro motion in cylinder body is done work.Therefore, the frictional force between piston and cylinder body can reduce the working efficiency of piston cylinder.Below for the frictional force the cylinder being applied to the compressor of refrigerator and air-conditioning between open piston and cylinder body on the impact of working efficiency.
Be applied to the compressor of refrigerator and air-conditioning, generally include cylinder and piston driver, and the compressor (abbreviation linear compressor) driven by linear electric motor and two kinds, the compressor (abbreviation rotary compressor) driven by electric rotating machine can be divided for by the difference of piston driver.Existing linear compressor, generally includes cylinder body, piston and linear electric motor, and wherein, piston two ends are by spring supporting, and linear electric motor drive piston to do linear reciprocating motion in the horizontal direction.And existing rotary compressor, then comprise cylinder body, piston and electric rotating machine, in order to avoid the poor starting problem that piston during compressor start causes at top dead center position, stagger the center of cylinder-bore center and crankshaft hole during the compressor design driven by electric rotating machine several angle (general 1-3mm).These two kinds of compressors, it all does linear reciprocating motion by piston and promotes air work in compression chamber in cylinder body, and the gas compression of low-temp low-pressure is become high temperature and high pressure gas, finally completes the circulation of whole refrigeration system through condenser, capillary tube and vaporizer.
But, in linear compressor, during piston movement, spring is in the alternately transition status of compression and extended state, because spring is elastomer, when above-mentioned alternately conversion, the distortion of spring must cause acting on driving force on piston and certain inclination angle occurs cylinder axis, therefore, there is rubbing action between piston and cylinder body.And in rotary compressor, due to cylinder-bore center and crankshaft hole center not at grade, piston is bound to have cylinder body the component of a side direction in movement process, and thus always having certain frictional loss, is all very disadvantageous to compressor performance or the reliability of part.
Visible, no matter be linear compressor, or, all there is out-of-alignment phenomenon between piston and cylinder body in rotary compressor, and when piston and cylinder body disalignment, cylinder body can apply radial force to piston, so produce frictional force between piston and cylinder body, because frictional force can consume the energy originally for doing work, therefore, frictional force between cylinder body and piston can affect the mechanical efficiency of cylinder to compression intracavity gas, reduces working efficiency and the reliability of compressor.
In order to reduce the friction of piston and cylinder body, compressor should ensure that piston is coaxial with cylinder body in assembly process as far as possible, to reduce the radial force that in piston movement process, cylinder body produces it.But in fact, owing to designing itself, and the impact of the factor such as part's machining errors and assembly error, to be difficult to ensure between piston with cylinder body completely coaxial is arranged, and this just means that between piston and cylinder body, federation exists frictional loss.Therefore, need a kind of structure of design badly, it can realize the self-adaptative adjustment to the piston caused due to design or processing and assembling factor etc. and cylinder body mismatch error diametrically, when axis like this between piston with cylinder body is no longer coaxial, also when namely piston is subject to the radial force effect of cylinder body applying, this structure can adjust the axis of piston to make piston all the time along the axis to-and-fro motion of cylinder body, and then effectively reduces the frictional loss between piston and cylinder body.
Summary of the invention
A technical problem to be solved by this invention is: realize the self-adaptative adjustment to the piston caused due to design or processing and assembling factor etc. and cylinder body mismatch error diametrically, reduce the frictional loss between piston and cylinder body.
In order to solve the problems of the technologies described above, the invention provides a kind of piston actuated bar be arranged between piston and piston driver, additionally providing a kind of piston cylinder assembly and compressor simultaneously.
According to a first aspect of the invention, the invention provides a kind of piston actuated bar, the first end of this piston actuated bar is used for being connected with piston, second end of piston actuated bar is used for being connected with piston driver, and be provided with at least one section of necking section between the first end of this piston actuated bar and the second end, when piston is subject to radial force, at least one section of necking section distortion is with the deflection enabling the first end of piston actuated bar that the direction of radially power occur.
Alternatively, at least one section of necking section is the first necking section.
Alternatively, at least one section of necking section is the first necking section and the second necking section, and the first necking section and the second necking section set gradually along the first end by piston actuated bar to the direction of the second end of piston actuated bar.
Alternatively, the minimum outer diameter of necking section is the external diameter of piston actuated bar
extremely
; And/or the length of necking section is 3 to 10 times of the minimum outer diameter of corresponding necking section.
Alternatively, compared with the second end of piston actuated bar, necking section is arranged closer to the first end of piston actuated bar.
Alternatively, piston actuated bar is made up of spring steel wire material or piano wire material.
According to a second aspect of the invention, present invention also offers a kind of piston cylinder assembly, this piston cylinder assembly comprises piston, piston actuated bar, cylinder body and piston driver, piston to be arranged in cylinder body and to coordinate with cylinder body and forms compression chamber, piston actuated bar is piston actuated bar of the present invention, the first end of piston actuated bar is connected with piston, second end of piston actuated bar is connected with piston driver, and piston driver is by the central axis to-and-fro motion of piston actuated bar driven plunger along cylinder body.
Alternatively, piston is the hollow cylindrical configuration that one end is closed, the first end of piston actuated bar stretches into the hollow cylindrical configuration inside of piston and is connected with one end closed of hollow cylindrical configuration, and the hollow cylindrical configuration being positioned at piston at least partially of the necking section of piston actuated bar is inner.
Alternatively, piston driver is linear electric motor or electric rotating machine, and the second end of piston actuated bar is connected with the mover of linear electric motor or electric rotating machine.
Alternatively, piston cylinder assembly also comprises resilient support assemblies, and resilient support assemblies is used for forming support to the mover of linear electric motor or electric rotating machine.
Alternatively, resilient support assemblies comprises motor support plate resonator board spring, the stator of the first end of motor support plate and linear electric motor or electric rotating machine leans, second end of motor support plate and the edge conjunction of resonant panel spring, one end away from piston actuated bar of the mover of the center of resonant panel spring and linear electric motor or electric rotating machine is connected.
According to a third aspect of the invention we, present invention also offers a kind of compressor, this compressor comprises piston cylinder assembly of the present invention.
Piston actuated bar for connecting piston and piston driver provided by the present invention, it can not only play the transmission effect of axial force, realize the transmission of power of piston driver to piston, and owing to comprising at least one section of necking section with less radial rigidity, it can carry out self-adaptative adjustment to mismatch error diametrically between the piston caused due to design or processing and assembling etc. and cylinder body, thus it is stressed to effectively reduce piston radial, reduce the frictional loss between piston and cylinder body.And piston actuated bar structure of the present invention is simple, processing and assembly cost lower, be easy to realization.
By being described in detail exemplary embodiment of the present invention referring to accompanying drawing, further feature of the present invention and advantage thereof will become clear.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 illustrates the structural representation of the piston actuated bar of first embodiment of the invention.
Fig. 2 illustrates the partial enlarged drawing of the necking section of piston actuated bar embodiment illustrated in fig. 1.
Fig. 3 illustrates the structural representation of the piston actuated bar of second embodiment of the invention.
Fig. 4 illustrates the structural representation of the piston cylinder assembly of one embodiment of the invention.
Fig. 5 illustrates the assembling schematic diagram of the piston of piston cylinder assembly embodiment illustrated in fig. 4, piston actuated bar and mover.
In figure:
1, piston actuated bar; 11, the first necking section; 12, the second necking section; 13, the first screw thread; 14, the second screw thread;
2, piston;
31, cylinder body; 32, electric machine casing;
41, iron core; 42, coil; 43, magnet steel support; 44, the first magnet steel; 45, the second magnet steel;
51, motor support plate; 52, resonant panel spring; 53, the first cushion block; 54, the second cushion block; 55, the 3rd cushion block.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.Based on the embodiment in the present invention, those of ordinary skill in the art, not carrying out the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, described technology, method and apparatus should be regarded as a part of authorizing specification.
In describing the invention, it will be appreciated that, the noun of locality is if the indicated orientation such as " forward and backward, upper and lower, left and right ", " laterally, vertical, vertical, level " and " top, the end " or position relationship are normally based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, when not doing contrary explanation, these nouns of locality do not indicate and imply that the device of indication or element must have specific orientation or with specific azimuth configuration and operation, therefore can not be interpreted as limiting the scope of the invention; The noun of locality " inside and outside " refers to inside and outside the profile relative to each parts itself.
In describing the invention; it will be appreciated that; the word such as " first ", " second " is used to limit component; be only used to be convenient to distinguish corresponding component; as there is no Stated otherwise; above-mentioned word does not have particular meaning, therefore can not be interpreted as limiting the scope of the invention.
Piston actuated bar provided by the present invention, it is arranged between piston and piston driver, for the driving force of piston driver is passed to piston.With reference to Fig. 1-5, the first end of piston actuated bar 1 of the present invention is used for being connected with piston 2, and the second end is used for being connected with piston driver, and is provided with at least one section of necking section between a first end and a second end.
Piston actuated bar 1 for connecting piston 2 and piston driver provided by the present invention, it can not only play the transmission effect of axial force, realize the transmission of power of piston driver to piston 2, and owing to comprising at least one section of necking section with less radial rigidity, it can carry out self-adaptative adjustment to mismatch error diametrically between the piston caused due to design or processing and assembling etc. and cylinder body, thus the radial force of piston 2 can be effectively reduced, reduce the frictional loss between piston 2 and cylinder body, increase work efficiency and functional reliability.
And, the present invention has the piston actuated bar 1 of at least one section of necking section by means of only arranging between piston 2 and piston driver, namely can realize the self-adaptative adjustment to piston 2 and cylinder body mismatch error diametrically, structure is simple, be easy to realize, processing and assembly cost lower.
The minimum outer diameter φ d of at least one section of necking section of piston actuated bar 1 of the present invention can be the external diameter φ D's of piston actuated bar 1
extremely
; And/or the length L1 of at least one section of necking section can be 3 to 10 times of the minimum outer diameter φ d of corresponding necking section.Such piston actuated bar 1 has more satisfactory axial rigidity and radial rigidity ratio, thus can more effectively realize object of the present invention.
In addition, along with the change of piston 2 radial force direction and size, piston actuated bar 1 needs alternating bending distortion occurs, this means that piston actuated bar 1 is faced with higher fatigue ruption risk, therefore, in order to improve the fatigue strength of piston actuated bar 1, piston actuated bar 1 can be made up of the spring steel wire material or piano wire material with high-fatigue strength, such as 65Mn, 50CrVA etc., effectively can reduce the fatigue ruption risk of piston actuated bar 1 like this, improve the functional reliability of piston actuated bar 1, extend the working life of piston actuated bar 1.
Fig. 1-2 shows the first embodiment of inventive piston driveshaft 1, in this first embodiment, is only provided with one section of first necking section 11 between the first end of piston actuated bar 1 and the second end.
As shown in Figure 1, the second connecting rod section that the piston actuated bar 1 of this first embodiment comprises first connecting rod section that length is L2, length is L3 and the length be connected between first connecting rod section and second connecting rod section are first necking section 11 of L1, the first end of piston actuated bar 1 is arranged on first connecting rod section end, for being connected with piston 2, and the second end of piston actuated bar 1 is arranged on second connecting rod section end, for being connected with piston driver.
The radial rigidity of the first necking section 11 is less, more easily there is radial deformation, therefore, when piston 2 because own axes and cylinder body axis occur eccentric and be subject to the radial force that cylinder body applies time, first necking section 11 can produce bending deflection in time, first connecting rod section for being connected with piston 2 can the direction of radially power be occurred wilfully, such piston 2 also can produce the deflection of radially force direction thereupon, and the direction of radial force is the direction contrary relative to the skew direction of cylinder body axis with piston axis, visible, under the effect of the first necking section 11, piston 2 can produce the deflection towards direction, cylinder body axis place when being subject to the radial force of cylinder body, make piston 2 can again along the to-and-fro motion of cylinder body central axis, thus the radial forces that can reduce between piston 2 and cylinder body, and then the frictional loss effectively reduced between piston 2 and cylinder body.Simultaneously, because the second connecting rod section be connected with piston driver still has higher axial rigidity and radial rigidity, therefore, when piston 2 is subject to radial force effect, second connecting rod section deforms diametrically hardly, still can play good axial force transmission effect.
Inventive piston driveshaft 1 can be accomplished in several ways with the connection of piston 2 and piston driver.In this first embodiment, thread connecting mode is adopted to realize.As shown in Figure 1, the first end of piston actuated bar 1 is provided with the first screw thread 13 for being connected with piston, and the second end of piston actuated bar 1 is provided with the second screw thread 14 for being connected with piston driver, the assembling of piston actuated bar 1 and piston 2 and piston driver can be realized so more conveniently, and processing more for convenience, cost is lower.
In addition, more easily radial deformation occurs and second connecting rod section can transmit axial force better in order to make first connecting rod section, compared with the second end of piston actuated bar 1, the first necking section 11 can be arranged closer to the first end of piston actuated bar 1.As shown in Figure 1, in this embodiment, compared with second connecting rod section, first necking section 11 is arranged closer to first connecting rod section, the impact of the first necking section 11 on the first connecting rod section be connected with piston 2 can be increased so further, and reduce the impact of the first necking section 11 on the second connecting rod section be connected with piston driver further, make when piston 2 is subject to radial force, more easily there is radial deformation in first connecting rod section, and second connecting rod section can keep higher axis and radial rigidity, realize the transmission effect of axial force better.
As shown in Figure 2, in this embodiment, the external diameter φ D of piston actuated bar 1 is φ 6mm, the minimum outer diameter φ d of the first necking section 11 is 0.45 times of the external diameter φ D of piston actuated bar 1, the length L1 of the first necking section 11 is 5 times of its minimum outer diameter φ d, and piston actuated bar 1 is made up of 65Mn spring steel material.
In order to illustrate that piston actuated bar 1 of the present invention has the axial rigidity and radial rigidity suited the requirements more intuitively, inventor has carried out simulation analysis to the mechanical property of piston actuated bar 1, is now described for the simulation analysis result of this first embodiment piston actuated bar 1.
For the linear compressor or the rotary compressor that are applied to refrigerator, the general environment protection type R600a refrigerant that adopts is as refrigeration agent.According to ASHRAE23 and the ISO947 testing standard of compressor, the condensing pressure of R600a refrigerant is 0.77MPa.And according to many experiments result, inventor finds that the radial force that the piston 2 that various cumulative error causes is subject to generally can not more than the active force of 10N.
Based on above-mentioned boundary conditions, in the load axially applying 700N of piston actuated bar 1, and in the radial direction of piston actuated bar 1, apply the load of 10N, the stress deformation simulation analysis result of first embodiment's piston actuated bar 1 can be obtained, wherein, when axially applying the active force of 700N, the maximum stress 120MPa of piston actuated bar 1, maximum distortion 0.0104mm; Meanwhile, when radial direction applies the active force of 10N, the maximum stress of piston actuated bar 1 and maximum distortion all betide the first necking section 11 place, and wherein the size of maximum stress is 118MPa, and the size of radial maximum distortion is 0.115mm.Visible, the piston actuated bar 1 of this first embodiment, its operationally radial-deformation be about 10 times of axial deflection, namely its axial rigidity is much larger than radial rigidity, effective transmission of axial force can not only be ensured, and can occur bending and deformation easily when radial force, realize the self-adaptative adjustment to piston 2 and cylinder body mismatch error, effectively reduce frictional loss.
Certainly, piston actuated bar 1 of the present invention is not limited to the structural type of above-mentioned first embodiment, can also arrange the necking section of more than two sections or three sections between its first end and the second end.In the second embodiment illustrated in fig. 3, between the first end of piston actuated bar 1 and the second end, be namely provided with two sections of necking sections.As shown in Figure 3, the difference of this second embodiment and the first embodiment is, in this second embodiment, the first necking section 11 and the second necking section 12 is provided with between the first end of piston actuated bar 1 and the second end, wherein, first necking section 11 is arranged between first connecting rod section L2 and third connecting rod section L4, namely and the second necking section 12 is arranged between third connecting rod section L4 and second connecting rod section L3, also the first necking section 11 and the second necking section 12 set gradually along the first end by piston actuated bar 1 to the direction of the second end of piston actuated bar 1.The working principle of the piston actuated bar 1 of this second embodiment is identical with the first embodiment, repeats no more herein.
Visible, the present invention utilizes piston actuated bar 1 axial rigidity being provided with necking section much larger than the characteristic of radial rigidity, under the prerequisite of effective transmission ensureing axial force, the self-adaptative adjustment to mismatch error between piston 2 and cylinder body can be realized, thus the problem that frictional force between the piston 2 that can solve dexterously because various inevitable error causes and cylinder body is larger, improve service behaviour and the working efficiency with the piston cylinder of this piston actuated bar 1.
Second aspect present invention additionally provides a kind of piston cylinder assembly.With reference to Fig. 4-5, piston cylinder assembly of the present invention comprises piston 2, cylinder body 31, piston driver and piston actuated bar 1 of the present invention, wherein, piston 2 to be arranged in cylinder body 31 and to coordinate with cylinder body 31 and forms compression chamber, the first end of piston actuated bar 1 is connected with piston 2, and the second end of piston actuated bar 1 is connected with piston driver.
Because piston actuated bar 1 of the present invention can realize the self-adaptative adjustment to mismatch error between piston 2 and cylinder body 31, therefore, even if owing to designing and the factor such as processing and assembling and there is mismatch error between the piston 2 of piston cylinder assembly of the present invention and cylinder body 31, cause the axis of piston 2 cannot ensure concentric setting with the axis of cylinder body 31, but due under the effect of piston actuated bar 1, piston 2 can produce and make own axes tend to the deflection with cylinder body 31 dead in line, therefore, the piston 2 of inventive piston cylinder component can keep the central axis to-and-fro motion along cylinder body 31 under the driving force effect of piston driver, thus the interaction reduced in radial direction between piston 2 and cylinder body 31, reduce frictional force therebetween, reduce frictional force to the loss of energy and the wearing and tearing to piston 2 and cylinder body 31, improve mechanical efficiency and the functional reliability of piston cylinder assembly.
Piston cylinder assembly of the present invention can be cylinder assembly or cylinder component, and piston driver can adopt linear electric motor, electric rotating machine or other driving mechanisms to drive.Because the action principle of piston actuated bar 1 in different piston cylinder assembly is all identical, therefore, the cylinder next only driven for the linear electric motor shown in Fig. 4-5 is described piston cylinder assembly of the present invention.
As illustrated in figures 4-5, in this embodiment, piston cylinder assembly comprises cylinder body 31, electric machine casing 32, piston 2, piston actuated bar 1, linear electric motor and resilient support assemblies.
Linear electric motor comprise stator and mover.As shown in Figure 4, stator comprises iron core 41, insulation framework and coil 42, and wherein, insulation framework mainly plays a supportive role, coil 42 is wound in the inside of insulation framework, and the outside that the iron core be made up of silicon steel plate 41 is fixed on insulation framework forms the magnetic circuit passage of linear electric motor.As shown in Figure 5, the magnet steel that mover comprises magnet steel support 43 and is arranged on magnet steel support 43, wherein, the plastic materials such as PPS (polyphenylene sulfide), PEEK (polyether-ether-ketone) or PET (polyester resin) of high strength preferentially selected by magnet steel support 43, also can select cast aluminium alloy to the less demanding application of electric efficiency; And according to the difference of operating mode, magnet steel generally can arrange 1 piece or 2 pieces, and as shown in Figure 5, in this embodiment, mover comprises two blocks of magnet steel, i.e. the first magnet steel 44 and the second magnet steel 45.
Piston 2 is connected with the mover of linear electric motor by piston actuated bar 1.As shown in Figure 5, in this embodiment, the hollow cylindrical configuration that piston 2 is closed for one end, the first end of piston actuated bar 1 stretches into the hollow cylindrical configuration inside of piston 2 and is connected with one end closed of hollow cylindrical configuration, and the hollow cylindrical configuration being positioned at piston 2 at least partially of at least one section of necking section of piston actuated bar 1 is inner.This just makes piston 2 which section no matter on whole length direction be subject to the effect of radial force F, and the necking section of piston actuated bar 1 all can occur bending and deformation in time, realizes the self-adaptative adjustment of the mismatch error to piston 2 and cylinder body 31.
Resilient support assemblies is used for being formed the mover of linear electric motor supporting.As shown in Figure 4, in this embodiment, resilient support assemblies comprises motor support plate 51 resonator board spring 52, first end and the stator of motor support plate 51 lean, second end of motor support plate 51 and the edge conjunction of resonant panel spring 52, the center of resonant panel spring 52 is connected with one end away from piston actuated bar 1 of mover.Resonant panel spring 52 is for providing certain support for mover, and when piston 2 moves, the border of resonant panel spring 52 is fixed, and core then offsets along with piston 2 moves, thus forms resonator system.Resonant panel spring 52 has the function of elastic element and existing supporting member concurrently, it has higher radial rigidity and axial rigidity ratio, therefore, it can provide enough rigidity for the to-and-fro motion of mover and have certain stroke when material stress is permitted, and, due to need not wearout parts, therefore, resonant panel spring 52 has higher reliability and longer working life.
The molded line of resonant panel spring 52 preferentially adopts involute math equation, the tensile stress of resonant panel spring 52 can be reduced so further, improve the stressed effect of resonant panel spring 52, improve its functional reliability, extend its working life, certainly, the molded line of resonant panel spring 52 also can adopt the helix of different radian to seamlessly transit to design.
In this embodiment, piston cylinder assembly comprises two pieces of resonance version springs 52, but in fact, according to real work feature, piston cylinder assembly can comprise 1 piece or polylith resonant panel spring 52, and these are all within protection scope of the present invention.
Cylinder body 31 for accommodating piston 2, electric machine casing 32 stators for accommodating linear electric motor, mover and resilient support assemblies.As shown in Figure 4, in this embodiment, cylinder body 31 and electric machine casing 32 are structure as a whole, wherein, the diameter of cylinder body 31 is less than the diameter of electric machine casing 32, one end away from electric machine casing 32 of cylinder body 31 is closed, and the open at one end away from cylinder body 31 of electric machine casing 32, like this when assembling, the moving parts of the structure that can first piston 2, piston actuated bar 1 and mover be assembled into one, then, in the cylinder body 31 that one end of being opened wide by electric machine casing 2 by this moving parts loads integrative-structure and electric machine casing 32, finally stator and resilient support assemblies are installed again.
Concrete assembling process can complete in accordance with the following steps:
(1) moving parts is assembled.Be first mover by magnet steel support 43, first magnet steel 44 and the second magnet steel 45 preassembly, then the second end of piston actuated bar 1 be fixed on mover, again the first end of piston 2 with piston actuated bar 1 be connected afterwards, complete the assembling of moving parts.
(2) loaded in cylinder body 31 and electric machine casing 32 by this moving parts, piston 2 is coordinated with cylinder body 31 and forms compression chamber, mover is then placed in electric machine casing 32.
(3) installation of stator and resilient support assemblies is completed.Stator one end is fixed on the bracket at tail part of cylinder body 31, then motor support plate 51 is placed at the other end of stator, place resonant panel spring 52 afterwards, and between two pieces of resonant panel springs 52 by under set gradually the first cushion block 53, second cushion block 54 and the 3rd cushion block 55, finally by the positioning hole designed in advance, with bolt, resonant panel spring 52 and motor support plate 51 are coupled together.
So far the assembling of piston cylinder assembly is completed.When piston cylinder assembly works, linear electric motor are piston driver, can produce rotary electromagnetic field after coil 42 passes into Ac, the permanent magnetic field that this electromagnetic field and the first magnet steel 44 and the second magnet steel 45 produce interacts, and drives piston 2 to do linear reciprocating motion in cylinder body 31 inside.This piston cylinder assembly is applied in the compressor of refrigerator or air-conditioning, namely can realizes the compression to refrigerant and exhaust process, the gas compression of low-temp low-pressure is become high temperature and high pressure gas, finally complete the circulation of whole refrigeration system through condenser, capillary tube and vaporizer.
Therefore, third aspect present invention additionally provides a kind of compressor, and this compressor comprises piston cylinder assembly of the present invention.
The foregoing is only exemplary embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a piston actuated bar (1), the first end of described piston actuated bar (1) is used for being connected with piston (2), second end of described piston actuated bar (1) is used for being connected with piston driver, it is characterized in that, be provided with at least one section of necking section between the first end of described piston actuated bar (1) and the second end, when described piston (2) is subject to radial force, the distortion of described at least one section of necking section is with the deflection enabling the first end of described piston actuated bar (1) that the direction along described radial force occur.
2. piston actuated bar (1) according to claim 1, is characterized in that, described at least one section of necking section is the first necking section (11).
3. piston actuated bar (1) according to claim 1, it is characterized in that, described at least one section of necking section is the first necking section (11) and the second necking section (12), and described first necking section (11) and described second necking section (12) set gradually along the first end by described piston actuated bar (1) to the direction of the second end of described piston actuated bar (1).
4. piston actuated bar (1) according to claim 1, is characterized in that, the external diameter (φ D) that the minimum outer diameter (φ d) of described necking section is described piston actuated bar (1)
extremely
and/or, 3 to 10 times of the minimum outer diameter (φ d) that the length (L1) of described necking section is corresponding necking section.
5. piston actuated bar (1) according to claim 1, is characterized in that, compared with the second end of described piston actuated bar (1), described necking section is arranged closer to the first end of described piston actuated bar (1).
6. piston actuated bar (1) according to claim 1, is characterized in that, described piston actuated bar (1) is made up of spring steel wire material or piano wire material.
7. a piston cylinder assembly, comprise piston (2), piston actuated bar, cylinder body (31) and piston driver, described piston (2) to be arranged in described cylinder body (31) and to coordinate with described cylinder body (31) and forms compression chamber, it is characterized in that, described piston actuated bar be as arbitrary in claim 1-6 as described in piston actuated bar (1), the first end of described piston actuated bar (1) is connected with described piston (2), second end of described piston actuated bar (1) is connected with described piston driver, described piston driver drives described piston (2) along the central axis to-and-fro motion of described cylinder body (31) by described piston actuated bar (1).
8. piston cylinder assembly according to claim 7, it is characterized in that, the hollow cylindrical configuration that described piston (2) is closed for one end, the first end of described piston actuated bar (1) stretches into the hollow cylindrical configuration inside of described piston (2) and is connected with one end closed of described hollow cylindrical configuration, and the hollow cylindrical configuration being positioned at described piston (2) at least partially of the necking section of described piston actuated bar (1) is inner.
9. piston cylinder assembly according to claim 7, is characterized in that, described piston driver is linear electric motor or electric rotating machine, and the second end of described piston actuated bar (1) is connected with the mover of described linear electric motor or electric rotating machine.
10. piston cylinder assembly according to claim 9, is characterized in that, described piston cylinder assembly also comprises resilient support assemblies, and described resilient support assemblies is used for forming support to the mover of described linear electric motor or electric rotating machine.
11. piston cylinder assemblies according to claim 10, it is characterized in that, described resilient support assemblies comprises motor support plate (51) resonator board spring (52), the first end of described motor support plate (51) and the stator of described linear electric motor or electric rotating machine lean, second end of described motor support plate (51) and the edge conjunction of described resonant panel spring (52), one end away from described piston actuated bar (1) of the mover of the center of described resonant panel spring (52) and described linear electric motor or electric rotating machine is connected.
12. 1 kinds of compressors, is characterized in that, described compressor comprise as arbitrary in claim 7-11 as described in piston cylinder assembly.
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| CN201610044850.0A CN105464943A (en) | 2016-01-22 | 2016-01-22 | Piston drive rod, piston cylinder assembly and compressor |
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| CN201610044850.0A CN105464943A (en) | 2016-01-22 | 2016-01-22 | Piston drive rod, piston cylinder assembly and compressor |
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| CN105464943A true CN105464943A (en) | 2016-04-06 |
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| CN201610044850.0A Pending CN105464943A (en) | 2016-01-22 | 2016-01-22 | Piston drive rod, piston cylinder assembly and compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106246504A (en) * | 2016-09-12 | 2016-12-21 | 珠海格力节能环保制冷技术研究中心有限公司 | Linear compressor |
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