CN102661266B

CN102661266B - Coolant compressor

Info

Publication number: CN102661266B
Application number: CN201110452190.7A
Authority: CN
Inventors: M·诺曼森; S·K·安德森; F·H·艾弗森
Original assignee: Secop GmbH
Current assignee: Secop GmbH
Priority date: 2010-11-12
Filing date: 2011-11-14
Publication date: 2016-06-08
Anticipated expiration: 2031-11-14
Also published as: DE102010051267B3; CN102661266A

Abstract

The present invention relates to a kind of coolant compressor (1), this coolant compressor has the electronic motor comprising stator (3) and rotor (2), rotor (2) is connected to quill shaft (7), static displacement element (10) is positioned at the inside of axle, and the transmission path (26) that has of volution substantially is formed between axle (7) and displacement element (10). For the inside of the quill shaft (7) that the axial support (18) of axle (7) and rotor (2) is positioned on displacement element (10).

Description

Coolant compressor

Technical field

The present invention relates to a kind of coolant compressor with electronic motor, this electronic motor comprises stators and rotators, rotor is connected on quill shaft, the leading section of quill shaft is immersed in oil groove, what fixed displacement element was at least part of is positioned at axle inside, and the oily transmission path of volution is formed between axle and displacement element substantially.

Background technology

This kind of coolant compressor, is manufactured into tight seal usually, is usually used to be connected on refrigeration equipment, such as, and refrigerator or refrigerator. As the rotating equipment of great majority, coolant compressor has to lubricate during operation. In order to this object, oil reserve, is commonly referred to oil groove, is placed on the inside of the housing around coolant compressor. In order to lubricate required lubricant, such as oil, takes out from oil groove and is fed into the supporting-point wherein needing lubrication. Under the domination of gravity, oil returns oil groove substantially. Oil is also usually used for cooling motor.

For the oil recovery coming from oil groove, it is known that be interact by the turning axle of rotor and fixed displacement element to form oil pump. Corresponding coolant compressor is recorded in, such as, in DE19510015C2 or EP1605163A1. In these coolant compressors, the oily transmission path of volution is formed between axle inside and displacement element-external. The sole purpose of displacement element forms this transmission path.

In order to rotor is arranged in coolant compressor, it is necessary to supporting, it can bear radial force, can bear again axial force. Usually, the support for this kind of object is arranged on supports outer, and this support can bear radial force, can bear again axial force. But, this kind of support has relatively high frictionloss, and usually when oil lubrication deficiency, frictionloss increases further. These frictionlosses have passive impact for coolant compressor.

Summary of the invention

The present invention is based on this task of efficiency improving coolant compressor.

With the refrigeration agent mentioned in the introduction of picture, it is positioned at the inside of quill shaft in the present invention for the axial support of axle, this task can be solved according to the present invention.

This kind of axial support is suitable for bearing the axial force acted on rotor or axle, and locates axle and rotor according to their axial location. Axial support is arranged on hollow mandrel interior and guarantees that axial support is arranged on the inside of oil transmission path, and therefore can be subject to enough oil lubrications. Therefore, the frictionloss being only little produces in the inside of axial support. Usually, other radial support is used for bearing radial force, but this kind of support can work with the form of the less friction advised than prior art, and therefore, it need not bear axial force.Generally speaking, in coolant compressor, with can the realizing without friction support of axle of rotor, this kind of mode can improve the efficiency of coolant compressor. Owing to axial support being arranged on axle inside, after coolant compressor starts, oil phase is to being full of this region rapidly, moreover it is possible to expection axial support has the long life-span.

Preferably, axial support has the contact surface being arranged on displacement member forward end portion. This one end is the top of displacement element, and when coolant compressor is when its running position, displacement element upright is upwards. Contact surface is set in the upper end of displacement element and allows relatively simply to manufacture axial support.

Preferably, contact surface is arranged in the rotation region of axle. This can keep the speed of relative movement between the contact surface of axial support and relative contact. This has favourable effect in the life-span of axial support, and can reduce frictionloss.

In particular it is preferred that, contact surface substantially point-like. Therefore, contact surface is made into, and such as, has surface circular, point-like or other conical by its shape. This makes the small-sized of contact surface, so that frictionloss is able to minimumization. Contact surface has metallic surface. Such as, contact surface can do picture metal cone body.

Advantageously, contact surface is formed by spheroid, and spheroid is positioned at the end of displacement element, and spheroid is to remain on displacement element in the way of shape adaptation substantially. Spheroid is can allow that its rotation remains on displacement element in the way of mobile. Spheroid guarantees that a shape supports, or the contact surface design of some shape. Spheroid is made up of hard metal or other the material being applicable to, and spheroid preferably comprises the not identical material of the material with displacement element.

In another embodiment, contact surface and displacement element make one, if needed, displacement element is hardened in contact surface region. When contact member is made with the material same with other parts of displacement element, this kind of embodiment is particularly advantageous. Utilize metallic substance, carry out hardening treatment in the region of relative contact. In the sense, one made by contact surface and displacement element, to ensure that structure is simple.

Preferably, displacement element is made up of thin sheet of metal parts, particularly the parts of deep drawn. Allow the structure of displacement element to have little shape error and diameter tolerance like this, specifically use honed thin sheet of metal parts in such an embodiment. This allows the radius clearance between point-device installation displacement element and axle, and this can change the pumping effect between displacement element and axle, moreover it is possible to improves the efficiency of coolant compressor by oil and increases the reliability of oil lubrication.

In different preferred embodiments, displacement element comprises plastic material, and specifically displacement element is made into such as injection-molded plastic parts. This kind of embodiment, in required shape, allows to manufacture displacement element efficiently with desired shape relative cost.

Preferably, by keeping device, displacement element is fixed on the fixing part of compressor, and specifically described maintenance device is made into such as clip. This means that displacement element is not directly installed on the fixing part of compressor, but by keeping device to be indirectly arranged on the fixing part of compressor. Keep device to allow specific compliance to connect, with load of decaying, such as, cause by axial force. Maintenance device is formed as clip, allows especially simply to design, be constructed in the effective mode of cost.

It particularly preferably is, keeps device to engage with the lower end of displacement element, and bear the gravity coming from displacement element and rotor. Axial force is sent to maintenance device from displacement element, adopts the mode of form fit in other words. Keep appliance ensure to have directly not contact in the axial direction between the axle of rotor and the static parts of compressor, such as compressor unit or radial support members.

Advantageously, oil transmission path limit by the spring of spirrillum, spring is arranged between displacement element and axle, the spring of spirrillum be supported on the inside of axle or displacement element outside on. Utilize spirrillum spring can retainer shaft simple geometrical shape relative to displacement element, to make these parts can be made up of the effective mode of cost. Simultaneously, it may be achieved the oily transmission path of volution, transmit to ensure that oil is effective. Helical spring is simply installed on axle inside by pressure or on the outside of displacement element. This also contributes to cost effectively to manufacture.

In another preferred embodiment, oil transmission path is formed by groove, and groove is formed in the inside of axle or the outside of displacement element. Especially, when displacement element is made into injection-molded plastic parts, it is simple that this kind of groove one becomes in displacement element. It is few that this can be kept for the component count needed for coolant compressor.

Accompanying drawing explanation

Below, with accompanying drawing on the basis of preferred embodiment, present invention is described, diagram:

Fig. 1 is the sectional view of coolant compressor,

Fig. 2 is the detail drawing of displacement element,

Fig. 3 is the enlarged view of cod,

Fig. 4 is the detail drawing of the first embodiment of oil transmission path, and

Fig. 5 is the detail drawing of the 2nd embodiment of oil transmission path.

Embodiment

Fig. 1 shows the sectional view of refrigeration compression moulding machine 1, and coolant compressor 1 comprises electronic motor, and it has rotor 2 and stator 3. Rotor 2 comprises permanent magnet 4 and short circuit ring 5, and is non-rotatably connected to axle 7 by base component 6. Rotor 2 is made into external rotor, and the stator 3 installed around center rotates.

Stator 3 comprises stator lamination 8 and stator coil 9.

Being provided with displacement element 10 in the inside of axle 7, displacement element is made into hollow cylindrical, and symmetry be positioned at axle 7.

Further, coolant compressor 1 comprises compressor assembly 11 and piston-cylinder assembly 12, and piston-cylinder assembly 12 has piston 13 and cylinder 14. Piston-cylinder assembly 12 is connected to crankpin 16 by union lever 15, crankpin 16 bias be arranged on transferring elements 17, this transferring elements is non-rotatable is connected to axle 7.

Transferring elements 17 covers the front side of axle 7 upper opening. Being provided with axial support 18 in axle 7 inside, it is formed in the upper end 19 of displacement element 10. The contact surface 20 of axial support 18 is formed by ball 21, and ball 21 pressure is arranged on the upper end 19 of displacement element 10. Reverse contact surface 22 is formed in transferring elements 17. Point cantact is formed between contact surface 22 and contact surface 20. This kind of point of contact is arranged in the region of the rotation 23 of axle 7.

In addition, axle 7 is radially supported in radial support 24, and radial support 24 is connected to stator lamination 8.

By keeping, device 25 is connected to the static parts of coolant compressor 1 to displacement element 10, is not shown specifically, so that displacement element 10 keeps static, and does not specifically carry out any rotary motion. The oily transmission path 26 being provided with volution between displacement element 10 and axle 7, by formalizing, the groove in displacement element 10 outside 27 is formed for it.The inner side 28 of axle 7 is formed as smooth.

The leading section 29 of axle 7 and the bottom 30 of displacement element 10 axially extend downwards, so that they are immersed in oil storage vessel, do not illustrate. Between the operating period of coolant compressor 1, rotor 2 rotates around stator 3. This also produces the rotary motion of axle 7 relative to displacement element 10. The rotation of axle 7 is upwards carried by oil transmission path 26 by from oil storage vessel. Therefore, axle 7 forms oil storage vessel together with displacement element 10. In axle 7, radial opening 31 is arranged to allow oil to pass through, to lubricate radial support 24. In direction upwards, oil transmission path 26 is continued from the upper end 19 of displacement element 10 by the opening 32 of converting member 17. From here, oil continuous lubrication is with the support of crankpin 16 and the union lever 15 of piston 13.

It is inner that axial support 18 is positioned at oil transmission path 26, therefore can obtain sufficient oil lubrication, even when low speed. By axial support 18, displacement element 10 supports axle 7, and therefore also support rotor 2, therefore locates these elements in the axial direction. Radial support 24 need not bear any axial force.

In axial direction due, rotor 2 is kept by the some region between contact surface 20 and relative contact 22. Respective surfaces and the relative contact 22 of ball 21 are hard, so, even if only small abrasion all must be anticipated. When contact surface 20 and relative contact 22 are positioned on rotation 23, speed of relative movement is quite low. By axial support 18 being arranged in oil transmission path 26, owing to this total energy ensures enough lubrications, so friction loss is minimum. Generally speaking, this can cause low energy expenditure, and the high-level efficiency of coolant compressor 1, extends work-ing life simultaneously.

Fig. 2 shows the three-dimensional space figure of displacement element 10. In this embodiment, displacement element 10 is manufactured into injection-molded parts, and comprises molded groove 33, and it is along outside 27 spiral extension of displacement element 10, to form oil transmission path 26. In this case, displacement element 10 is made into hollow cylinder. The upper end 19 of displacement element 10 is closed, and is provided with and is positioned at axially extended protruding the 34 of center, and it comprises outer radial periphery wall 35, and wall 35 is interrupted by least one slit 36. Protruding 34 are used for holding ball 21, and during periphery wall 35 elastic expansion, ball 21 can be contained in the inside of protruding 34.

The lower end 30 of displacement element 10 is opening, and comprises two axially extended protruding 37,38, plays the effect stopping and keeping device 25 and torque protection.

Fig. 3 shows the enlarged view of the upper end 19 of displacement element 10, and displacement element 10 has protruding 34 balls 21 and is contained in the inside cavity taking periphery wall 35 as limit. Some are still given prominence on surrounding wall 35 in the axial direction by ball 21, to ensure that contact surface 20 is only formed by ball 21. Ball 21 only has sub-fraction surface to give prominence on the upper limb of periphery wall and by comparatively safe support.

Taking periphery wall 35 as the cavity bottom on limit comprises opening 39, by this opening, this cavity is connected to the inner chamber 40 of hollow displacement element 10. By the slit 36 in opening 39 and periphery wall 35, gas is discharged from the inside 40 of displacement element 10, and guides away in the upward direction.

Fig. 4 shows the enlarged view of the displacement element 10 with axle 7, and they form oil storage vessel together. In this case, displacement element 10 is made into stretching thin slice shape metal parts, and 19 have integrated bongrace 41 at its upper end.Bongrace 41 forms contact surface 20. The outside 27 of displacement element 10 is made into smooth, and oil transmission path 26 is formed by helical spring 42, and helical spring 42 is around the smooth outside 27 of displacement element 10. Helical spring 42 is clamped on outside 27 by its inner radial, but there is little gap between the outside of helical spring 27 and the inside 28 of axle 7, so that axle 7 can rotate around helical spring 42 and displacement element 10, and is not obstructed.

Fig. 5 shows the embodiment of the embodiment substantially corresponding to reference to the accompanying drawings 4. But, here, the outside of helical spring 42 rests on the inside 28 of axle 7, so that helical spring 42 extrudes against axle 7 and together rotates with axle 7. Displacement element 10 is made with the simple thin slice shape metal parts of smooth outside, is at least flat hard in the region of bongrace 41.

Claims

1. the coolant compressor with electronic motor, electronic motor comprises stators and rotators, rotor is connected to quill shaft, the front end of quill shaft is immersed in oil storage vessel, the at least part of oily transmission path in hollow mandrel interior and volution substantially of static displacement element is formed between quill shaft and displacement element, it is characterised in that: the inside being positioned at quill shaft (7) for the axial support (18) of quill shaft (7).

2. coolant compressor according to claim 1, it is characterized in that: axial support (18) has contact surface (20), contact surface (20) is arranged on the anterior end (19) of displacement element (10).

3. coolant compressor according to claim 2, it is characterised in that: contact surface (20) is arranged in the region of rotation (23) of quill shaft (7).

4. coolant compressor according to claim 2, it is characterised in that: contact surface (20) is point-like substantially.

5. coolant compressor according to claim 2, it is characterized in that: contact surface (20) is formed by ball (21), ball (21) is positioned at the anterior end (19) of displacement element (10), and ball (21) is remained essentially on displacement element (10) by the mode of shape adaptation.

6. coolant compressor according to claim 2, it is characterised in that: contact surface (20) and displacement element (10) are made for one.

7. coolant compressor according to any one of claim 1-6, it is characterised in that: displacement element (10) is made up of thin sheet of metal parts.

8. coolant compressor according to any one of claim 1-6, it is characterised in that: displacement element (10) comprises plastic material.

9. coolant compressor according to any one of claim 1-6, it is characterised in that: displacement element (10) is fixed on the static parts of coolant compressor (1) by maintenance device (25).

10. coolant compressor according to claim 9, it is characterised in that: keep device (25) to engage and bear the weight coming from displacement element (10) and rotor (2) with the lower end (30) of displacement element (10).

11. coolant compressors according to any one of claim 1-6, it is characterized in that: oil transmission path (26) is limited by helical spring (42), helical spring (42) is arranged between displacement element (10) and quill shaft (7), and helical spring (42) is supported on the inside (28) of quill shaft (7) or the outside (27) of displacement element (10).

12. coolant compressors according to any one of claim 1-6, it is characterized in that: oil transmission path (26) is formed by groove (33), this groove (33) formalizes on the inside (28) of quill shaft (7) or the outside (27) of displacement element (10).

13. coolant compressors according to claim 7, it is characterised in that: displacement element (10) is the parts of deep drawn.

14. coolant compressors according to claim 8, it is characterised in that: displacement element (10) is made into injection-molded plastic parts.

15. coolant compressors according to claim 9, it is characterised in that: described maintenance device makes clip.

16. coolant compressors according to claim 6, it is characterised in that: displacement element (10) is hardened in the region of contact surface (20).