CN101408163A

CN101408163A - Refrigerant compressor arrangement

Info

Publication number: CN101408163A
Application number: CNA2008101769985A
Authority: CN
Inventors: S·E·奥特詹; J·E·尼森; C·彼得森
Original assignee: Danfoss Compressors GmbH
Current assignee: Danforth Home Compressors Ltd; Danfoss Deutschland GmbH
Priority date: 2007-10-12
Filing date: 2008-10-13
Publication date: 2009-04-15
Anticipated expiration: 2028-10-13
Also published as: US20090110585A1; CN101408163B; ITTO20080737A1; DE102007048936B4; DE102007048936A1; IT1391486B1

Abstract

The invention concerns a refrigerant compressor arrangement with a compressor unit (2) supported in a case by means of springs (12) and comprising at least one bolt (26) with a bolt head (25), a holder (23) being arranged between the compressor unit (2) and at least one spring (12), the holder (23) having in its front a recess, in which the bolt head (25) engages, and which is connected to the spring (12). It is endeavoured to reduce the noise generation during operation of the refrigerant compressor arrangement. For this purpose, the bolt head (25) is arranged in the recess (24) with lateral clearance (34).

Description

Cold compressor apparatus

Technical field

The present invention relates to a kind of cold compressor apparatus, this device has by spring and is supported on compressor unit in the casing, this compressor unit comprises that at least one has the bolt of bolt head, retainer is arranged between compressor unit and at least one spring, have the dimple that engages with bolt head in the front portion of retainer, and retainer and spring are attached together.

Background technique

This cold compressor apparatus for example can be from US 4,106, obtains in 881.Compressor unit comprises that one has along the motor of the vertical axle that extends.Compressing mechanism is located at the top of motor, and comprises a piston that moves reciprocatingly in cylinder.Piston is by the driving that rotatablely moves of motor rotor.The stator lasmination of motor by bolt together.The head of each bolt all inserts in the retainer, and retainer is inserted in the spring.Spring is installed on the holding member again, and this holding member is fixed on the bottom of casing.

From US 4,406, can obtain similar embodiment in 590.

At the compressor unit run duration, the to-and-fro motion of compressing mechanism piston causes the vibration of compressor unit.The spring that is provided is used to exactly guarantee that this vibration can not be delivered to casing, perhaps has only limited vibration transfer to casing.The vibration that is delivered on the casing will be delivered on the chiller plant that this cold compressor apparatus is installed.Chiller plant one vibration will produce sizable noise.

Summary of the invention

Purpose of the present invention prevents to produce noise exactly.

Just can realize this purpose by cold compressor apparatus mentioned in the operation technique field, in this cold compressor apparatus, bolt head is arranged to have lateral clearance in dimple.

On gravitational direction, compressor unit still supports by retainer.When more or all springs were connected on the compressor unit by corresponding retainer, retainer was given spring with the weight transfer of compressor unit.The direction of the vibration that occurs in the compressor unit is substantially perpendicular to the action direction of spring.Spring is at gravitational direction upper support compressor unit.When present permission compressor unit carries out for a short time when mobile with respect to retainer, the vibration of compressor unit can mobile a little earlier compressor unit before beginning mobile retainer.Accordingly, the final mobile meeting of retainer retainer when using form fit to connect between bolt head and retainer understand the mobile of generation.The moving through spring and can send the corresponding less energy of casing to of less amplitude.Accordingly, noise produces and will be inhibited.For the frequency range about 800Hz especially like this, and this frequency range is inappropriate especially for the user.In this frequency range, the amplitude of vibration is less relatively, so lateral clearance needn't be excessive.This means that bolt head still obtains enough guiding in retainer.

Preferably the dimensional range of lateral clearance is 0.2 to 0.5 millimeter.For example, this gap size can be 0.25 to 0.35 millimeter.If the amplitude of vibration is less than this gap, the horizontal contact between bolt head and the retainer just can be avoided fully, so pass to spring and then just can avoid fully to shell vibration from compressor unit by retainer.If amplitude is bigger, the vibration of compressor unit also can make retainer move.But as mentioned above, this moves has less amplitude, so the transmission of energy is minimized.

Preferably, the compressor unit seating is on this front side, and the degree of depth of dimple is greater than the expanded range of bolt head on this depth direction.This causes also having produced in the axial direction the gap.So-called " axial direction " is meant the direction of bolt axis.So compressor unit will only be supported on the front side of retainer.This is arranged to bolt head therefore can avoid the front side of bolt head and the friction between the retainer all having the gap on the circumferential direction and between its place, front side and the retainer in retainer.

Preferably, the difference in size between the dimple degree of depth and the bolt head extrusion is 0.4 to 1 millimeter.Especially, this gap size can be between 0.5 and 0.7 millimeter.This gap neither be big especially.But this is enough to realize decoupling (decoupling) the vibration between compressor unit and retainer, is like this at least basically.

Preferably, retainer is made by carrying out smooth interactional plastic materials with compressor unit, supports mutually by smooth surface between retainer and the compressor unit.Therefore, can produce relative movement between compressor unit and the retainer, so compressor unit can not pass to retainer with moving, the perhaps just transmission of limited extent.Moving that retainer is final is more little, and be just more little to the risk that environment transmits noise by casing.

Preferably, bolt head has undercut portions in its peripheral surface, and the protuberance that inwardly extends in dimple engages with retainer in the undercut portions back.This has simplified the manufacturing of cold compressor apparatus.Be installed in gap on the bolt head if retainer has, when the retainer that compressor unit is installed with the bottom in assembling process was mobile so, retainer will drop.Yet if the undercut portions that engages with protuberance retainer on the bolt head is used, the gap between bolt head and the retainer can be kept the while retainer and still can be remained on the bolt head regularly.After being assemblied in retainer on the bolt head, move the compressor unit that has along the downward retainer that hangs of gravitational direction, retainer but can not get loose.So retainer can be connected on the spring by simple method.

Preferably, dimple is centered on by circumferential wall, circumferentially is furnished with at least two otch that from inside to outside extend in the wall.These otch cause circumferential wall can outwards produce resiliently deformable more easily.This all is favourable for the manufacture process of retainer and the manufacture process of cold compressor apparatus.In the manufacture process of retainer, retainer can take off from mould (for example injection mould) more easily.Protuberance itself needn't be out of shape; On the contrary, circumferentially wall deforms.When being installed in retainer on the bolt head, be exactly that retainer has been bitten bolt head with colloquial style ground wording.When circumferential wall sprang back to its original shape, protuberance just was maintained in the dimple.

Preferably, protuberance has the extension littler than undercut portions in the axial direction.Though protuberance extends to undercut portions, but still kept gap axial and horizontal or radially between bolt head and the retainer.If compressor unit is bearing on the front side of retainer, it is to make not have protuberance to contact with bolt head when being in this position that bolt head has at least one position.

Preferably, retainer is made for hollow article.This means retainer round hollow article, this hollow article can be no problemly under shed.This has alleviated weight.Retainer is light more, and it is just low more from the noise energy that compressor unit passes to spring, and the noise that is penetrated in the environment is more little.

Preferably, this front side is formed on the side of front panel, and front panel has a plurality of grooves on the bottom side relative with the front side.Groove also makes quality alleviate.Simultaneously, the support that is retained between the groove guarantees that front panel has enough stability to bear the gravity of compressor unit.

Preferably, groove is along the circumferential wall direction opening of retainer.This also is the measure of further weight reduction.

Preferably, retainer is made by the electrical insulation plastic materials.Therefore, this can avoid compressor unit especially the electric current in the motor of compressor unit be passed to casing by retainer and spring.Therefore, avoided for third-party danger.

Description of drawings

Hereinafter the present invention will be described for preferred embodiment in conjunction with the drawings, among the figure:

Fig. 1 is the longitudinal sectional drawing of cold compressor apparatus,

Fig. 2 is the schematical top view after the refrigeration compressor casing is opened,

Fig. 3 is the perspective view of retainer and bolt,

Fig. 4 is the bottom perspective view of retainer,

Fig. 5 be retainer sectional drawing and

Fig. 6 is retainer and bolt and spring assembly sectional drawing together.

Embodiment

Compressor unit 2 is placed in the casing 1.Compressor housing 4 is connected to motor stator 3, and compressor housing 4 comprises cylinder 5 and bearing 6.In bearing 6, be supported with motor reel 7, carry rotor 8 and come driven plunger 11 by crank pin 9 and connecting rod 10, piston 11 to-and-fro motion in cylinder 5 on the axle 7.Spiral compression spring 12 provides elastic support for the compressor unit 2 in the casing 1.And pressure piping 13 is also made flexible.

In order to adopt the cylinder head 14 that extends radially and exceed stator 3, expansion section 15 is provided in the casing 1, this expansion section also comprises the electric bush 16 with bushing pin 17, the inner end carrying plug 18 of bushing pin.In the bottom of casing 1, the both sides of lining 16 all provide recess 19 and 20.Like this, the wall of casing 1 forms four adjacent portion W1-W4, and these four adjacent portion W1-W4 and four block A1-A4 interact, and these blocks are arranged on the compressor unit 2.These blocks are positioned the bottom side of square stator 3 in the present embodiment.The edge 21 of stator 3 is designed to oblique, makes that they have roughly the same distance apart from corresponding adjacent portion W1-W4 on all positions.Block A1-A4 stretches out and exceeds these beveled edge, makes them by abutting to the displacement along any movement direction in the drawing plane of Fig. 2 of limit compression machine unit 2 on the adjacent portion.Therefore, lining 16 and plug 18 have obtained safe protection between

recess

19,20.

Block A1-A4 is formed by the flange of retainer 23, and this retainer is used for spiral compression spring 12.Retainer 23 has dimple 24, and the bolt head 25 of bolt 26 inserts in this dimple.Metal retainer is welded on the bottom of casing 1.Retainer 23 is made by the plastic materials of anti-refrigeration agent and electrical insulation.

In order to prevent that compressor unit 2 from carrying out the unallowed big displacement that makes progress, carriage 29 is by on the upside that is bolted to stator, and is positioned on the side relative with cylinder 5.Further, a dihedral protuberance 30 is fixed on casing 1 place, and is positioned at the less distance in carriage 29 tops.The upside 31 of cylinder head 14 has roughly the same distance apart from the covering wall 32 of casing 1.

At compressor unit 2 duration of works, the vibration of generation mainly is transverse to the spin axis along the vertical motor shaft of arranging 7.If these vibration transfer are given casing 1 and passed to the equipment (for example chiller plant) that this casing is installed from casing, then high relatively noise load can appear in casing 1 periphery.Partial vibration can be suppressed by spiral compression spring 12, therefore has only the vibration transfer than small intensity to arrive casing 1.But, interfering noise still can exist, and can be penetrated in the external environment condition.

The special embodiment of the retainer 23 shown in Fig. 3 to 6 can further reduce the generation of noise.Retainer 23 is made by plastic materials, and the mode with low friction between the metal of this plastic materials and stator 3 interacts.This plastic materials is known to the crowd with its trade name " Hailaer (HALAR) ".This material is a fluoropolymer polymer, and it had both had the chemoresistance to corrosive refrigeration agent and lubricant oil, has dimensional stability again, and has smooth surface further.At last, this plastic materials is an electrical insulation, makes it can stop leakage current or other electric currents to transmit to casing 1 from motor.

Retainer 23 has front side 31, and front side 31 is made into smooth and interacts with the smooth supporting plane 32 of stator 3.This means that stator 3 can slide on retainer 23.

In order to allow this slip, bolt head 25 is supported in the dimple 23, and has radial and axial gap.At this, " radially " and " axially " is with respect to the axis 33 of bolt 26.

Be of a size of 0.1 to 0.5 millimeter in gap 34 in the radial direction, for example 3 millimeters.Axial clearance 35 dimensional ranges are 0.4 to 1 millimeter, for example 0.6 millimeter.This gap is also little.But it is enough to reduce from stator 3 to spiral compression spring 12 corresponding vibration transmission.

This retainer has a plurality of protuberances 36, and these protuberances radially extend in this dimple 26.Bolt head 25 has undercut portions 37, and protuberance 36 engages in the back of this undercut portions when bolt head 25 inserts dimple 24.

In this structure, undercut portions 37 is determined size according to protuberance 36, make when in the bolt head 25 insertion dimples 24, between retainer 23 and bolt head 25 retaining shaft to and radial clearance.In other words, protuberance 36 extends axially less than undercut portions 37.Like this,, also can retainer 23 be installed on the bolt head 25, but this moment, line belt had the compressor unit of the retainer 23 of downward suspension from the below when assembling during cold compressor apparatus.Protuberance 36 remains on the stator place with undercut portions 37 reliably with retainer 23.So retainer 23 can insert at an easy rate in the spiral compression spring 12 and connect to form plug.

Front side 31 is formed on the front panel 38.Along circumferential direction, several otch 39 are distributed on the front panel 38, make front panel 38 can produce outside deformation to a certain degree in needs.For example, retainer 23 usefulness time of its injection are shaped and after injection moulding is finished this needs will be just arranged when mould shifts out.In this example, corresponding core body can be pulled out from retainer 23 at an easy rate, and it causes protuberance 36 and front panel 38 to be out of shape radially outwardly.Distortion also is suitable when bolt head 25 inserts in the dimple 24.

In addition, retainer 23 is made hollow article, that is to say retainer round cavity 40, and cavity 40 extends to the opening 40 on the diapire 41 of retainer 23.Retainer 23 is light more, and the vibration risk that is passed to spiral compression spring 12 via retainer 23 is just more little.

On the side relative with front side 31, front panel 38 has the groove 43 that the circumferential wall in several edges is directed downwards opening.Also can weight reduction by this embodiment.Adjacent portion 44 remains between the groove 43, and by these grooves, retainer 23 seatings are on spiral compression spring 12.

Claims

1, a kind of cold compressor apparatus, this cold compressor apparatus has compressor unit, this compressor unit is supported in the casing by spring and comprises that at least one has the bolt of bolt head, retainer is arranged between compressor unit and at least one spring, the front portion of this retainer has dimple, bolt head is bonded in this dimple, and retainer and spring are attached together, and it is characterized in that: bolt head (25) is arranged to have lateral clearance (34) in dimple (24).

2, cold compressor apparatus according to claim 1 is characterized in that: the dimensional range of this lateral clearance (34) is 0.2 to 0.5 millimeter.

3, cold compressor apparatus according to claim 1 and 2 is characterized in that: this compressor unit (2) seating is on front side (31), and the degree of depth of dimple (24) is greater than the expanded range of bolt head (25) on this depth direction.

4, cold compressor apparatus according to claim 3 is characterized in that: the difference in size scope between this expanded range of the degree of depth of this dimple (24) and bolt head (25) is 0.4 to 1 millimeter.

5, according to each described cold compressor apparatus in the claim 1 to 4, it is characterized in that: this retainer (23) is made by carrying out interactional glossily plastic materials with compressor unit (2), support mutually by smooth surface (31,32) between this retainer (23) and the compressor unit (2).

6, according to each described cold compressor apparatus in the claim 1 to 5, it is characterized in that: bolt head (25) has undercut portions (37) in its peripheral surface, and the protuberance (36) that inwardly extends in dimple (24) engages with retainer (23) in the back of this undercut portions.

7, cold compressor apparatus according to claim 6 is characterized in that: dimple (24) is centered on by circumferential wall (38), circumferentially is furnished with at least two otch (39) that from inside to outside extend in the wall (38).

8, cold compressor apparatus according to claim 6 is characterized in that: in the axial direction, the extension of protuberance (36) is less than undercut portions (37).

9, according to each described cold compressor apparatus in the claim 1 to 8, it is characterized in that: retainer (23) is made for hollow article.

10, according to each described cold compressor apparatus in the claim 1 to 9, it is characterized in that: front side (31) are formed on the side of front panel (38), and front panel (38) has a plurality of grooves (43) on the bottom side relative with front side (31).

11, cold compressor apparatus according to claim 10 is characterized in that: groove (43) is in the direction upper shed of the circumferential wall of retainer (23).

12, according to each described cold compressor apparatus in the claim 1 to 11, it is characterized in that: retainer (23) is made by the electrical insulation plastic materials.