CN102454578A

CN102454578A - Hermetic compressor

Info

Publication number: CN102454578A
Application number: CN2011103218620A
Authority: CN
Inventors: 佐藤纯
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2010-10-21
Filing date: 2011-10-21
Publication date: 2012-05-16
Also published as: US20120100021A1; JP2012087711A

Abstract

A hermetic compressor includes a hermetic container, a motor element, and a compression element. A shaft of the compression element includes a main shaft, a flange projecting from the main shaft, and an eccentric shaft connected to the flange. A main bearing has a thrust surface contacting and sliding on the flange of the shaft. The thrust surface consists of a first portion and a second portion. The first portion is farther from the compression chamber than the center axis is. The second portion is closer to the compression chamber than the center axis is. The area of the first portion is larger than the area of the second portion. This hermetic compressor has a high efficiency and a high reliability.

Description

Closed-type compressor

Technical field

The present invention relates to be used for the closed-type compressor of freeze cycle such as deep freezer.

Background technique

Closed-type compressor comprises in seal container: as the cylinder body (block) of supporting frame; Be arranged at the compressing member on this cylinder body top; With the electric element that is arranged at inferior part of the cylinder block.

The axle that is fixed with the rotor of electric element is supported in the bearing portion of the approximate centre that is arranged at cylinder body according to the mode that can rotate.Through this rotation, the driving force of electric element is communicated to compressing member.

Fig. 8 is the profile diagram of existing closed-type compressor 500.Fig. 9 is the plan view of the cylinder body 9 of closed-type compressor 500.

Closed-type compressor 500 comprises seal container 1 and axle 2.Rotor 3 and the motor of stator 4 formations as electric element.Axle 2 is pressed in the rotor 3.

One end of connecting rod 5 is installed on the crank pin 11 as the eccentric part of axle 2.Wrist pin 8 is installed on the other end of connecting rod 5, and is fixed on the piston 7.Connecting rod 5, wrist pin 8, piston 7 and cylinder 6 constitute compressing member.Refrigerator oil 10 is trapped in the bottom of seal container 1.

Be provided with crank pin 11 and balance plate 12 on the top of axle 2.The eccentric rotation of crank pin 11 back and forth drives the piston 7 of compressing member.Be provided with the thrust face 14 of bearing thrust load in the upper-end surface of the bearing portion 15 of cylinder body 9.The lower surface of thrust face 14 and balance plate 12 directly slides, and so just in closed compressor 500, constitutes the thrust slide part.

But, existing closed-type compressor 500, efficient reduces sometimes.

In TOHKEMY 2000-120540 communique, disclose a kind of and closed-type compressor 500 similar closed-type compressors.

Summary of the invention

Brief summary of the invention

Closed-type compressor comprises seal container, electric element and compressing member.The axle of compressing member has: main shaft part, from main shaft part outstanding lip part and the eccentric axial portion that is connected with lip part.Piston is to-and-fro motion on the 1st direction and 2nd direction opposite with it in pressing chamber.Main bearing has the lip part of axle and the thrust face of its butt and slip.Thrust face is made up of following two parts: on the direction parallel with the 1st direction, compare with central shaft away from the section 1 of pressing chamber with on the direction parallel with the 1st direction, compare the part 2 near pressing chamber with central shaft.The area of the section 1 of thrust face is bigger than the area of part 2.

This closed-type compressor efficient height and reliability are high.

Description of drawings

Fig. 1 is the profile diagram of the closed-type compressor in the mode of execution 1 of the present invention.

Fig. 2 is the plan view of the cylinder block (cylinder block) of the closed-type compressor in the mode of execution 1.

Fig. 3 is the major component sectional view of the closed-type compressor in the mode of execution 1.

Fig. 4 is the major component amplification profile diagram of the electric element of the closed-type compressor in the mode of execution 1.

Fig. 5 representes the variation for the reaction load of the angle of rotation in the closed-type compressor in the mode of execution 1.

Fig. 6 is the profile diagram of the compressing member of the closed-type compressor in the mode of execution 2 of the present invention.

Fig. 7 is the exploded perspective view of the compressing member of the closed-type compressor in the mode of execution 2.

Fig. 8 is the profile diagram of existing closed-type compressor.

Fig. 9 is the plan view of the cylinder body of existing closed-type compressor.

Embodiment

(mode of execution 1)

Fig. 1 is the profile diagram of the closed-type compressor 1001 in the mode of execution 1 of the present invention.Closed-type compressor 1001 comprises: seal container 101, be disposed at the electric element 105 in the seal container 101 and be disposed at the compressing member 106 in the seal container 101.Seal container 101 is used for storing lubricant oil 102.Electric element 105 comprises stator 103 and rotor 104.Compressing member 106 is attached to the top of electric element 105, and drives through electric element 105.

The axle 110 that constitutes compressing member 106 possesses: along the main shaft part 111 of central shaft C111 extension; According to the lip part of giving prominence to from main shaft part 111 away from the mode of central shaft C111 (flange) 112; And eccentric axial portion 113 parallel with central shaft C111 and that extend from the upper surface 112A of lip part 112.Central shaft C111 extends at axis of orientation 1001A.In mode of execution 1, axis of orientation 1001A extends along Vertical direction.Main shaft part 111 is extended at the direction 111C along axis of orientation 1001A from lip part 112.In mode of execution 1, direction 111C is towards the below of Vertical direction.Eccentric axial portion 113 is arranged on the position eccentric with respect to main shaft part 111, that is, eccentric axial portion 113 is parallel with central shaft C111 and extend along the central shaft C113 different with central shaft C111, from lip part 112 to the direction 111D extension opposite with direction 111C.Direction 111D in mode of execution 1 above Vertical direction.Rotor 104 hot pressing are fixed (shrink fitted) in main shaft part 111.Be provided with oil supply mechanism 114 in the inside of axle 110.Be provided with the spiral helicine oil groove 114A of giving on the surface of axle 110.Be communicated with for the end of oil groove 114A with oil supply mechanism 114, the other end extends to the lower surface 112B of lip part 112.

In the cylinder block 115 that constitutes compressing member 106, be formed on the rectangular axis of orientation 1001B of axis of orientation 1001A and go up the pressing chamber that is general cylindrical shape 116 that extends.In cylinder block 115, be provided with the main bearing 117 that on axis of orientation 1001A, extends.The main shaft part 111 that in main bearing 117, is provided with axle 110 runs through axis hole 117A wherein.Axis hole 117A extends along central shaft C117.

Piston 118 inserts in the pressing chamber 116 of cylinder block 115 with the mode that freely reciprocatingly slides on axis of orientation 1001B.Piston 118 has the wrist pin 120 that extends abreast with axis of orientation 1001A.Wrist pin 120 is that piston 118 is bonded mechanism 119 and axle 110 bindings.One end of connect mechanism 119 runs through wrist pin 120 with the mode that can rotate, and the other end of connect mechanism 119 runs through eccentric axial portion 113 with the mode that can rotate.Pressing chamber 116 (piston 118) is positioned at from the central shaft C111 direction 116A parallel with axis of orientation 1001B.

The end face 117C of the main bearing 117 in the cylinder block 115 has the thrust face 121 on smooth plane.Thrust face 121 directly slides with the lower surface 112B of lip part 112; Axle 110 under the state that runs through axis hole 117A, the load of the Vertical direction that supporting produces because of the load of the rotor 104 and the Vertical direction that deadweight produced of axle 110 with because of the influence of the load that compression produced that receives piston 118.Thrust face 121 directly slides with the following 112B of lip part 112, so just constitutes the thrust slide part.

Fig. 2 is the plan view of seeing from direction 111C of thrust face 121 of the cylinder block 115 of closed-type compressor 1001.Fig. 3 is the major component sectional view of closed-type compressor 1001.As shown in Figure 2, thrust face 121 surrounds axis hole 117A fully in the plane identical with thrust face 121, and promptly the inward flange 121D of thrust face 121 surrounds axis hole 117A fully in the plane identical with thrust face 121.The outward edge 121C of thrust face 121 watches having on the direction parallel with axis of orientation 1001A (Fig. 1) and is roughly orbicular shape.This orbicular center C 121 is positioned at the central shaft C117 with respect to axis hole 117A, on the eccentric position of the predetermined distance L11 that only squints on the direction that is limited.That is, the center C 121 of thrust face 121 is with on the opposite direction 116B of the direction 116A of pressing chamber 116, from the central shaft C117 predetermined distance L11 that only squints.

The thrust width 124 of thrust face 121 is to be inward flange 121D and the distance between the outward edge 121C on the radiation direction at center with central shaft C117.In thrust width 124, minimum from the thrust width 124A of the direction 116A of the central shaft C117 of axis hole 117A, the thrust width 124B of the direction 116B of decentre axle C117 is maximum.That is, on direction 116B away from pressing chamber 116, thrust width 124 maximums.Like this, the area of thrust face 121 increases on the direction of leaving pressing chamber 116 gradually.Last at the direction 116A parallel, 116B with axis of orientation 1001B, compare with central shaft C117 and to compare more near the area of the part 121A of the thrust face 121 of the direction 116A of pressing chamber 116 big than with central shaft C117 further from the area of the part 121B of the thrust face 121 of the direction 116B of pressing chamber 116.

In thrust face 121, be provided with oil groove 127 near the position of pressing chamber 116, it extends with axis of orientation 1001B as the axial direction of pressing chamber 116 abreast.Drawn by oil supply mechanism 114 from the bottom of seal container 101 and the lubricant oil 102 through giving oil groove 114A through oil groove 127, primary lubricant formed slide part among the 112B below thrust face 121 and lip part 112.

Oil groove 127 is arranged on the position near pressing chamber 116, and like this, the part 121B away from pressing chamber 116 in thrust face 121 guarantees the area that the lip part 112 with axle 110 slides.

To thrust face 121 implement nitriding treatment with, utilize the ceramic coating of potteries such as CrN, TiN to handle, be processed into the surface that friction is little, hardness is strong.

Fig. 4 is the major component amplification profile diagram of the electric element 105 of closed-type compressor 1001.The iron core of the stator 103 of electric element 105 has a plurality of tooth portion, constitutes to have to concentrate the concentrated coiled electric element 105 that is wound on the winding in a plurality of tooth portion.The magnetic center 126 of rotor 104 is with respect to the magnetic center 125 of stator 103, and predetermined distance L12 only squints on direction 111C.In mode of execution 1, direction 111C is towards the below of Vertical direction.

Electric element 105 can be according to inverter control according to different revolution runnings, and in mode of execution 1, its revolution is 60Hz normally, and maximum number of revolutions is set to 80Hz.

Fig. 8 and existing closed-type compressor 500 shown in Figure 9 comprise: be arranged at as the compressing member on the top of the cylinder body 9 of support frame and be arranged at the electric element of the bottom of cylinder body 9.In existing closed-type compressor 500, in compression process, produce the reaction force of the piston load of controlling in the pressure receive cylinder 6 in and aperture.This reaction force acts on the side of the crank pin 11 of axle 2 as load.

In the bearing portion 15 that is arranged at axle 2 and cylinder body 9, the gap about 10～30 μ m is arranged.Axle 2 tilts, and in thrust slide part and axle journal slide part, contacts with cylinder body 9.In the thrust slide part, receive the influence of this piston load, the above load of deadweight of axle 2 and rotor 3 becomes load and has an effect.

Know by above; Be arranged at as the compressing member on the top of the cylinder body 9 of supporting frame and be arranged in the compressor 500 of electric element of bottom of cylinder body 9 comprising; As thrust load, except the deadweight of axle 2 and rotor 3, the also additional influence that the load of piston 7 is arranged; The face of thrust slide part is pressed local increasing, and a so-called end in contact takes place easily.

Hence one can see that, in closed-type compressor 500, presses for the face that reduces the local thrust slide part that increases, and guarantees the slide area of whole thrust slide part, prevents that the face of the part of thrust slide part from pressing increase.

But if increase the slide area of thrust slide part, so, the slip resistance in the thrust slide part will increase, so the slippage loss of thrust slide part sometimes increases, efficient reduces.

Below, for 1001 its effects of explanation of the closed-type compressor in the mode of execution 1.Closed-type compressor 1001 is connected with the cooling system of refrigerant gas circulated therein.

To electric element 105 energising, rotor 104 makes axle 110 rotations, meanwhile, is that the rotatablely moving of eccentric axial portion 113 at center passed to wrist pin 118 through connect mechanism 119 with central shaft C111.The result is, piston 118 in pressing chamber 116 with axis of orientation 1001B to-and-fro motion abreast.

According to the to-and-fro motion of piston 118, refrigerant gas is inhaled in the pressing chamber 116 from cooling system, sprays to cooling system once more after being compressed.

Piston 118 bears the reaction load F1 of direction 116B during compression refrigerant gas in pressing chamber 116.Rotation along with axle 110; Whole surface at the thrust face 121 of the upper-end surface 117C that is formed at cylinder block 115; As shown in Figure 3, above the load F3 of rotor 104 and the direction 111C down of the axis of orientation 1001A of the Vertical direction that deadweight produced of axle 110 acts on.Simultaneously, on thrust face 121, have an effect in the load F2 part of the component of the direction that the conduct that produces because of reaction load F1 is parallel with axis of orientation 1001A.Below being arranged at the lip part 112 of axle in 110 in the direct slip of 112B and thrust face 121, according to the size of the area of contact of the lower surface 112B of lip part 112 and thrust face 121, the life of cutting down output influences load F2 to slippage loss and face.

Fig. 5 representes the variation with respect to the angle of rotation reaction load F1 of the compression stroke in the closed-type compressor 1001.In Fig. 5, y coordinate is represented the size of reaction load F1, and abscissa is represented the angle of rotation of axle 110.At 0 degree during angle of rotation, piston 118 on direction 116A decentre axle C111 farthest, according to the highest compression compression refrigerant gas recently.Spend the rotation of angle of rotation from 0 degree angle of rotation to 180 at axle 110; Piston 118 sucks the suction stroke of refrigerant gas in pressing chamber 116; From the rotation of 180 degree angle of rotation to 360 degree angle of rotation, carry out the compression stroke of compression refrigerant gas at axle 110.With reference to Fig. 3, Fig. 5, load F2 local generation effect in thrust face 121 and direction 111C (direction parallel with axis of orientation 1001A) that produce because of the influence of the reaction load F1 of piston 118 is described.

The reaction load F1 that acts on the piston 118 is determined by the internal diameter of pressure in the pressing chamber 116 and pressing chamber 116.In compression stroke, axle 110 is pushed piston 118 on direction 116A, so; As shown in Figure 5; Be not at 360 degree during angle of rotation but near 330 degree of compression stroke the second half, reaction load F1 becomes maximum reaction load F1max, greatly acts on the axle 110 through connect mechanism 119.

The second half in the compression stroke that produces maximum reaction load F1max; Eccentric axial portion 113 is positioned on the direction parallel with axis of orientation 1001B to be compared with central shaft C117 more near the position of pressing chamber 116, and the reaction load F1 that acts on the piston 118 acts on the eccentric axial portion 113 through connect mechanism 119.

The diameter of the diameter of the main shaft part 111 of axle 110 and the axis hole 117A of main bearing 117 is provided with the gap about 10～30 μ m.Reaction load F1 is acting on the eccentric axial portion 113 on the direction 116B.Because of above-mentioned gap, on axle 110, take place towards the inclination of the central shaft C117 of axis hole 117A.Because of this inclination, on central shaft C117, in thrust face 121 and the zone roughly opposite side of pressing chamber 116 act on the thrust face 121 as the load F2 of the component on the direction parallel with axis of orientation 1001A of reaction load F1.

Therefore; On whole thrust face 121; Load F3 with the direction 111C that deadweight produced of axle 110 has an effect because of rotor 104; For central shaft C111, with the part 121B of the roughly opposite side of pressing chamber 116, the load F2 of the direction 111C that produces because of the influence of reaction load F1 has an effect.

The center C 121 that makes thrust face 121 is with respect to the central shaft C117 of the axis hole 117A predetermined distance L11 that only squints, and like this, the thrust width 124 that forms thrust face 121 is in the gamut heterogeneity that becomes.

Promptly; Guarantee to increase the thrust width 124B of part 121B (comparing part 121B) of thrust face 121 of the load F2 of the Vertical direction that influence produced of bearing the reaction load F1 that the compression because of piston 118 produces in the part, make and compare with central shaft C117 and little near the thrust width 124A specific thrust width 124B of the part 121A of pressing chamber 116 away from pressing chamber 116 with central shaft C117.The face that causes with regard to the load F2 that can suppress because of local generation effect on thrust face 121 is like this pressed and is increased.

The result is to reduce the slippage loss of the following 112B and the thrust face 121 formed thrust slide parts of lip part 112.Pressing because of the face of the part 121B that prevents to bear load F2 increases, and reduces the eccentric wear of thrust face 121, can improve the efficient and the reliability of closed-type compressor 1001.According to this structure, can reduce the area of whole thrust face 121, further reduce the eccentric wear of thrust face 121, improve the efficient of closed-type compressor 1001, improve reliability.

In addition, can increase from being arranged at oil groove 127 on the thrust face 121 and supply with the oil mass of giving of thrust faces 121, the slide part of more lubricating oil 102 lubricated thrust faces 121.Oil groove 127 is arranged at the littler part 121A of specific thrust width 124 in the thrust face 121, can guarantees the area of pressing the lower surface 112B of the lip part 112 of a side of significantly having an effect to slide, and the face that can prevent is pressed and increased with face.The result is, can improve the lubricating status of the slide part of thrust face 121, further improves the reliability of closed-type compressor 1001.

Thrust face 121 is implemented nitriding treatment, utilized the ceramic coating of potteries such as CrN, TiN to handle; So; Thrust face 121 become friction less, surface that hardness is strong, the lower surface 112B that can further reduce lip part 112 contacts the slip resistance when sliding with slip surface 121.Therefore, can further reduce the slippage loss of thrust slide part, raise the efficiency, in addition,, can improve the wear resistance of thrust slide part through strengthening the surface hardness of thrust face 121.

The area in the slip that acts on whole thrust face 121 can be further dwindled in the processing that friction through thrust face 121 less, hardness is high, realizes friction still less.

In thrust face 121, according to the part 121B of the load F2 effect of direction 111C near the part 121A of pressing chamber 116 mode, thrust face 121 run-off the straights at direction 111C skew step-down.That is, thrust face 121 tilts along direction 116B towards direction 111C.So just can make the whole surface of the whole butt thrust face 121 of lower surface 112B of lip part 112.The result is not only can further avoid an end in contact of thrust slide part, and can prevent that local face pressure from increasing, and suppresses the eccentric wear of thrust slide part.

In electric element 105, the magnetic center 126 of rotor 104 squints on direction 111C with respect to the magnetic center 125 of stator 103, so because of magnetic attraction, generation will be fixed on the effect that the axle 110 on the rotor 104 lifts towards the direction 111D of top.The result is, the load F3 of the Vertical direction 111C that produces because of the deadweight of rotor 104 and axle 110 when rotated reduces.Like this, the face of thrust face 121 is pressed and is reduced, and therefore, can obtain the high reliability of closed-type compressor 1001.

As stated, closed-type compressor 1001 comprises seal container 101 and electric element 105 and compressing member 106.Electric element 105 has stator 103 with rotor 104 and be arranged in seal container 101.Compressing member 106 is driven and is arranged in the seal container 101 by electric element 105.Compressing member 106 has axle 110, cylinder block 115, piston 118 and connect mechanism 119 and main bearing 117.Axle 110 has: the main shaft part 111 of extending along central shaft C111, from outstanding lip part 112 of main shaft part 111 and the eccentric axial portion 113 that is connected with lip part 112, and be fixed with rotor 104.Cylinder block 115 have be positioned at from the central shaft C111 of main shaft part 111 to the rectangular direction 116A of central shaft C111 on pressing chamber 116.Piston 118 in pressing chamber 116, to-and-fro motion on the opposite direction 116B of direction 116A and direction 116A.Connect mechanism 119 links piston 118 and eccentric axial portion 113.On main bearing 117, be formed with axis hole 117A with 111 supportings of main shaft part of axle 110.Main bearing 117 has the lip part 112 of encirclement axis hole 117A and axle 110 and the thrust face 121 of its butt and slip.Thrust face 121 is made up of following two-part: last at the direction 116A parallel, 116B with direction 116A, compare with central shaft C111 away from the part 121B of pressing chamber 116 with compare part 121A with central shaft C111 near pressing chamber 116.The area of the part 121B of thrust face 121 is bigger than part 121A.

The load F2 of the component on the direction 111C of load F3 on the Vertical direction 111C that thrust face 121 supporting produces because of the deadweight of rotor 104 and axle 110 and the reaction load F1 that produces as compression because of piston 118.

Store lubricant oil 102 in the seal container 101.On thrust face 121, be provided with and axis hole 117A is communicated with and lubricant oil 102 passes through oil groove 127.Oil groove 127 is arranged on the part 121A of thrust face 121.Oil groove 127 extends along the straight line L101 that extends at direction 1116A from central shaft C111.

Axle 110 main shaft part 111 from lip part 112 along extending with the rectangular direction 111C of direction 116A.Thrust face 121 tilts along direction 116B towards direction 111C.

The magnetic center 126 of the rotor 104 of electric element 105 squints on direction 111C with respect to the magnetic center 125 of stator 103.The magnetic center 126 of rotor 104 is compared with the magnetic center 125 of stator 103 and is positioned at the below.

In mode of execution 1, compressing member 106 is attached to the top of electric element 105.But the bottom that compressing member 106 is arranged at electric element 105 also can obtain same effect.

(mode of execution 2)

Fig. 6 is the profile diagram of the compressing member of the closed-type compressor 1002 in the mode of execution 2 of the present invention.Fig. 7 is the exploded perspective view of the compressing member of closed-type compressor 1002.In Fig. 6 and Fig. 7, with the identical identical Ref. No. of parts mark of the closed-type compressor 1001 of Fig. 1 to the mode of execution 1 shown in Figure 4.

Closed-type compressor 1002 in the mode of execution 2 also comprises: the thrust-bearing 210 that constitutes the ring-type of the thrust face 121 in the closed-type compressor 1001 in the mode of execution 1.

In closed-type compressor 1002, be provided with the recess 200 that surrounds axis hole 117A at the end face 117C of the main bearing 117 that constitutes cylinder block 115.In recess 200, embed thrust-bearing 210.Main bearing 117 by: radial bearing 117R and the thrust-bearing 210 with axis hole 117A constitutes.

Recess 200 has and is roughly orbicular shape.Supporting surface 201 as the bottom of recess 200 surrounds axis hole 117A, and supported Thrust Bearing 210.Along with from towards the direction 116A of pressing chamber 116 116B in the opposite direction, the width of supporting surface 201 increases gradually.Part at the periphery of recess 200 is provided with the little recess 202 that extends to foreign side.

The outward edge 210C of thrust-bearing 210 has roughly orbicular shape.Thrust-bearing 210 have with mode of execution 1 in the identical shape of thrust face 121, and have the thrust face 213 of identical function.Under the state that thrust-bearing 210 embeds in the recess 200, set the thickness of bearing 210 to the some outstanding modes of direction 111D from recess 200 according to thrust face 213.The center C 211 of through hole 211 of central part that is arranged at thrust-bearing 210 is consistent with the central shaft C117 of axis hole 117A.Be provided with and be arranged at the chimeric protuberance 212 of little recess 202 in the recess 200 in the part of the periphery of thrust-bearing 210.

As stated, main bearing 117 has radial bearing 117R and thrust-bearing 210.On radial bearing 117R, form axis hole 117A.Thrust-bearing 210 has thrust face 121 and forms with radial bearing 117R split.

Thrust-bearing 210 is fixed with the chimeric of protuberance 212 through little recess 202.

Same with mode of execution 1, the thrust face at least of thrust-bearing 210 213 is implemented nitriding treatment, is utilized the ceramic coating of potteries such as CrN, TiN to handle, be processed into friction less, surface that intensity is high.

Thrust face 213 is formed by part 213A, 213B.Part 213A than central shaft C111 (center C 211) more near pressing chamber 116.Part 213B than central shaft C111 (center C 211) further from pressing chamber 116.Through thickness or the supporting surface 201 of recesses machined 200 of adjustment thrust-bearing 210, like this, according to the part 213B of thrust face 213 with respect on direction 111D, the squint mode of step-down of part 213A, thrust face 213 run-off the straights.

On the part of the thrust face 213 of thrust-bearing 210, have and the diametric(al) setting of the oil groove 214 of oil groove 127 identical functions of mode of execution 1 along through hole 211.In mode of execution 2, oil groove 214 be arranged in the thrust face 213 near the position of pressing chamber 116, promptly C211 is provided with along direction 116A from the center.

Draw then through giving the lubricant oil of oil groove 114A from the bottom of seal container 101 by oil supply mechanism 114, arrive the thrust slide part of the lower surface 112B that is formed at thrust face 213 and lip part 112, primary lubricant thrust slide part through oil groove 214.

Below, the action of the closed-type compressor 1002 in the mode of execution 2 is described.Same with the closed-type compressor 1001 in the mode of execution 1, to electric element 105 energisings, rotor 104 rotations, compressing member 106 is worked thereupon.The result is that refrigerant gas is inhaled in the pressing chamber 116 from cooling system, sprays to cooling system once more after being compressed.

In the closed-type compressor 1002 in mode of execution 2; Rotation along with axle 110; On the thrust face 213 of the thrust-bearing 210 of main bearing 117, the load F3 on the Vertical direction 111C that produces because of the deadweight of rotor shown in Figure 6 104 and axle 110 acts in the above all sidedly.The load F2 local action of the component on the Vertical direction 111C of the reaction load F1 that produces as the compression because of piston 118 simultaneously, is on the part 213B of thrust face 213.

In the direct slip of the lower surface 112B of the lip part 112 on being arranged at axle 110 and the thrust face 213 of thrust-bearing 210; The size of the area of contact of the area of the part that is contacted with thrust face 213 according to the lower surface 112B as lip part 112, load F2 cuts down output to slippage loss and face and gives birth to influence.Last at the direction 116A parallel, 116B with axis of orientation 1001B, compare with center C 211 and are zones that load F2 is born in the part away from the part 213B of the thrust face 213 of pressing chamber 116.Same with the closed-type compressor 1001 in the mode of execution 1, in closed-type compressor 1002, the area that also makes part 213B is that the area near the part 213A of pressing chamber 116 is that thrust width 215 is big than comparing with center C 211 for thrust width 215.Like this, can suppress to increase because of caused of the load F2 of local action on thrust face 213 presses.

The result is, and is same with mode of execution 1, can reduce the slippage loss of thrust face 213 formed thrust slide parts of lower surface 112B and the thrust-bearing 210 of lip part 112.Prevent that the part from bearing the face of the part 213B of load F2 and press increasing, so just can reduce the eccentric wear of thrust face 213, the efficient and the reliability of raising closed-type compressor 1002.

Utilization is arranged at the oil groove 214 on the thrust face 213 of thrust-bearing 210, can increase the oil mass of giving of supplying with thrust faces 213 from oil groove 214, the slide part of more lubricating oil 102 lubricated thrust faces 213.In thrust face 213, it is arranged among the littler part 213A of thrust width 215, can guarantee the significantly slide area of effect part 213B in the above of increase face pressure, and the face that can prevent is pressed increase.The result is, can improve the lubricating status of slide part of the thrust face 213 of thrust-bearing 210, further improves the reliability of closed-type compressor 1002.

Through implementing nitriding treatment, utilize the ceramic coating of potteries such as CrN, TiN to handle, thrust face 213 become friction less, surface that intensity is high, can further reduce the slip resistance that slip produced of the lower surface 112B and the thrust face 213 of lip part 112.Therefore, can further reduce the slippage loss of the following 112B and the thrust slide part that thrust face 213 constitutes of lip part 112, raise the efficiency,, can improve the wear resistance of thrust slide part through strengthening the surface hardness of thrust face 213.

According to the friction of thrust face 213 less, processing that hardness is strong, can further dwindle the area in the slip that acts on the whole thrust face 213 in the thrust-bearing 210, realize low friction.

Thrust-bearing 210 is another parts with main bearing 117 (radial bearing 117R) split, so, can with main bearing 117 separate machined.Therefore, nitriding treatment and the ceramic coating that can easily implement thrust face 213 is implemented are handled, and according to the mode that thrust face 213 is tilted along direction 116B towards direction 111C, can easily process it.

The result is, can be with low price and easily adjust and set the degree that ceramic coating is handled, and the inclination that can easily process thrust face 213, so, can make thrust-bearing 210 also adapt to the different compressor of compressed capability.

In mode of execution 2, be arranged in the closed-type compressor of bottom of electric element 105 at compressing member 106, also can use the structure of thrust face 213, and can access same effect.

For the closed-type compressor in the mode of execution 1,2 1001,1002, because of having reduced the slippage loss of thrust slide part, obtain high reliability, therefore, can be applicable to refrigeration equipments such as air-conditioning and fridge-freezer.

The present invention is not limited to mode of execution 1,2.

Claims

1. a closed-type compressor is characterized in that, comprising:

Seal container;

Have stator and rotor and be arranged at the electric element in the said seal container; With

Driven and be arranged at the compressing member in the said seal container by said electric element,

Said compressing member has:

Axle, it has: along the main shaft part of extension of central axis, from said main shaft part outstanding lip part and the eccentric axial portion that is connected with said lip part, and said rotor is fixed in this axle;

Cylinder block, its have be positioned at from the said central shaft of said main shaft part with rectangular the 1st direction of said central shaft on pressing chamber;

Piston, its in said pressing chamber, said the 1st direction and with the said the 1st the 2nd direction in the opposite direction on to-and-fro motion;

Connect mechanism with said piston and the binding of said eccentric axial portion; With

Main bearing, it is formed with an axis hole that said said main shaft part is carried out the axle supporting, and has the thrust face that the said lip part said axis hole of encirclement, said axle carries out the butt slip,

Said thrust face comprises: on the direction parallel with said the 1st direction, compare the section 1 away from said pressing chamber with said central shaft; With compare part 2 with said central shaft near said pressing chamber,

The area of the said section 1 of said thrust face is bigger than the area of said part 2.

2. closed-type compressor as claimed in claim 1 is characterized in that:

Said thrust face supporting: the load of the Vertical direction that produces because of the deadweight of said rotor and said axle and follow the component of the Vertical direction of the reaction load that the compression of said piston produces.

3. closed-type compressor as claimed in claim 1 is characterized in that:

Constitute in said seal container and store lubricant oil,

Be provided with said axis hole at said thrust face and be communicated with the oil groove that said lubricant oil is passed through.

4. closed-type compressor as claimed in claim 3 is characterized in that:

Said oil groove is arranged at the said part 2 of said thrust face.

5. closed-type compressor as claimed in claim 4 is characterized in that:

Said oil groove from said central shaft along the straight-line extension that extends in said the 1st direction.

6. closed-type compressor as claimed in claim 1 is characterized in that:

The said main shaft part of said axle from said lip part to extending with rectangular the 3rd direction of said the 1st direction,

Said thrust face tilts along said the 2nd direction and towards said the 3rd direction.

7. closed-type compressor as claimed in claim 1 is characterized in that:

Implement nitriding treatment and ceramic coating processing at said thrust face.

8. closed-type compressor as claimed in claim 1 is characterized in that:

Said main bearing has:

Be formed with the radial bearing of said axis hole; With

The thrust-bearing that has said thrust face and be arranged with said radial bearing branch.

9. closed-type compressor as claimed in claim 1 is characterized in that:

The magnetic center of the said rotor of said electric element squints on said the 3rd direction with respect to the magnetic center of said stator.

10. closed-type compressor as claimed in claim 9 is characterized in that:

The said magnetic center of said rotor is compared with the said magnetic center of said stator and is positioned at the below.