CN201255094Y - Sealed type refrigerating compressor - Google Patents
Sealed type refrigerating compressor Download PDFInfo
- Publication number
- CN201255094Y CN201255094Y CNU2008201889291U CN200820188929U CN201255094Y CN 201255094 Y CN201255094 Y CN 201255094Y CN U2008201889291 U CNU2008201889291 U CN U2008201889291U CN 200820188929 U CN200820188929 U CN 200820188929U CN 201255094 Y CN201255094 Y CN 201255094Y
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- CN
- China
- Prior art keywords
- bent axle
- ball bearing
- crankshaft
- bearing assembly
- cylinder block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model proposes a sealed refrigeration compressor, which comprises a sealed shell, an electromotor and a gas compressor arranged in the sealed shell. The gas compressor comprises a cylinder block, a crankshaft, an air cylinder, a plunger and accessories. A crankshaft mounting hole is arranged in the middle of the cylinder block. An eccentric axis is arranged on one end of the crankshaft. A connecting rod connects the eccentric axis with the plunger arranged in the air cylinder. The crankshaft comprises a lubricating oil supply channel. The utility model is characterized in that a double-row ball bearing component; the crankshaft passes through the axle hole of the double-row ball bearing component. An electric machine rotor is telescoped in the crankshaft, or the super-long segment of the inner ring of the double-row ball bearing component. The sealed refrigeration compressor adopts the double-row ball bearing component which can bear axial load and radial load so that a main bearing on the crankshaft moves in the axial direction and the radial direction by means of rolling friction, thus significantly reducing the loss of the main bearing resulting from mechanical friction to improve the performance of the compressor. The utility model has the advantages of simple structure, being assembled conveniently and the like.
Description
Technical field
The utility model relates to refrigeration compressor, especially a kind of compressor that is used for family expenses and small refrigeration systems.
Background technique
Existing sealed refrigeration compressor is installed in the airtight housing, motor and cylinder are installed on the cylinder block, promote the bent axle that has eccentric shaft that connecting rod-piston moves back and forth and be assemblied on the crankshaft hole of cylinder seat, the weight of bent axle and the motor rotor installed above thereof is supported by the crankshaft hole upper-end surface of cylinder block.
During compressor operating, the motor drives crankshaft rotating, thus the power that the intermittent pressurized gas of piston is produced is delivered to the eccentric shaft of bent axle and the main bearing of bent axle and cylinder seat cooperation by connecting rod.
Because the weight that bent axle and rotor are born in the crankshaft hole upper-end surface, it also is an end thrust vertically downward, therefore frictional loss takes place when bent axle rotates, and crankshaft main bearing then bears the radial load that produces because of compressor compresses gas, and crankshaft rotating also produces frictional loss.
The internal structure of the reciprocating piston closed compressor of prior art as shown in Figure 1,
Among the figure, the compression set that comprises parts such as motor stator 2, rotor 5, bent axle 20, cylinder block 30, cylinder 31, piston rod 40, piston 50, valve group 60, cylinder head 70 is sealed in the seal container of being made up of lower casing 3 and upper casing 6.During compressor operating, motor drives bent axle 20 rotations by rotor 5, thereby the piston 50 that drives in crankshaft eccentric shaft 21, connecting rod 40 and the cylinder 31 moves back and forth, and carries out air-breathing and exhaust by the action period property of valve group 60.Fuel sucking pipe 1 is connected in bent axle 20 ends, and its effect is that the lubricant oil that will be stored in lower casing 3 offers each friction pair of compressor and is lubricated and cools off.
Can see that from Fig. 1 the main bearing of existing compressor crank shaft 20 is sliding frictions.
In order to reduce the frictional loss of main bearing, can reduce the diameter and the friction pair length of main bearing in the prior art as far as possible, but can not unrestrictedly reduce because of it is subjected to the requirement of intensity and minimum fuel delivery.
In order to reduce friction loss, bent axle support place has had the structure that adopted the thrust ball ball bearing (be as the patent No. 02260924.5 bent axle piston type freezer compressor) in hermetic compressor, can reduce the axial rub loss like this, but the main bearing place of bent axle is a friction slip still, and loss is bigger.
The model utility content
The purpose of this utility model provides a kind of sealed refrigeration compressor of using ball bearing, its mechanical friction loss that can reduce main bearing to be to improve compressor performance, has simple in structure, ease of assembly, advantages such as improvement on existing compressor arrangement, realization easily.
The purpose of this utility model can be to realize by following technical solution:
A kind of sealed refrigeration compressor, it has the shell of sealing, in can, has the motor formed by stator and rotor and by this electric motor driven gas compressing apparatus, described gas compressing apparatus comprises cylinder block, cylinder, the valve group, cylinder head, piston, piston rod, bent axle, cylinder and cylinder block disjunctor, the crankshaft installed hole is established at the cylinder block middle part, bent axle passes the crankshaft installed hole, one end of bent axle has eccentric shaft, piston rod is connected eccentric shaft with piston in placing cylinder, motor stator is fixedly mounted on the cylinder block, and bent axle has the lubricant oil supply passage, it is characterized in that:
Scheme one, suit one biserial ball bearing assembly in the crankshaft installed hole, bent axle passes the inner ring axis hole of two row ball bearing assembly with interference fit, and the rotor cover is packed on the bent axle.
Scheme two, the inner ring of the two row ball bearing assembly of suit goes out one section than outer ring overlength in the crankshaft installed hole, and rotor is set in this overlength section, and bent axle passes the inner ring axis hole of two row ball bearing assembly with interference fit.
For scheme two, bent axle can not established the oil suction section and make and become short bent axle, and the inner ring axis hole top interference fit of two row ball bearing assembly is inserted short crankshaft end, and the oil suction pipe end is inserted in the bottom.
In the structure of the above scheme, the two row ball bearing assembly can be installed with interference fit by the crankshaft installed hole on its outer ring and the cylinder block, and this is a kind of General Construction of not flanged mounting disc.
The two row ball bearing assembly also can be a kind of structure that has mounting flange, also is to add on its outer ring to manage blue circle, and the screw hole that passes the flange circle with set screw is with two row ball bearing assembly and cylinder block fixed installation.
Be compared with the prior art, the utility model has following characteristics:
The utility model is a kind of whole assembly that adopts biserial zanjon ball ball bearing, and bent axle passes the inner ring axis hole of two row ball bearing assembly with interference fit, makes to form an overall structure of being convenient to install.The radial load that this two row ball bearing assembly produces in the time of can bearing thrust load that the weight of bent axle, rotor causes and compressor compresses gas simultaneously, make that main bearing axially and is radially all moving with the form of rolling friction on the bent axle, thereby the mechanical friction loss that can reduce main bearing significantly is to improve compressor performance, has simple in structure, ease of assembly, advantages such as improvement on existing compressor arrangement, realization easily.
Below in conjunction with accompanying drawing the utility model is further described.
Description of drawings
Fig. 1 is the reciprocating piston closed compressor structural drawing of prior art;
Fig. 2 is embodiment's one structural representation;
Fig. 3 is embodiment's two structural representations;
Fig. 4 is embodiment's four structural representations;
Fig. 5 is two row ball bearing assembly and the crankshaft structure figure that adopts among the embodiment one;
Fig. 6 is the air compressor motor rotor structure figure that adopts among the embodiment one;
Fig. 7 is the plan view of Fig. 6;
Fig. 8 is two row ball bearing assembly and the crankshaft structure figure that adopts among the embodiment two;
Fig. 9 is two row ball bearing assembly and the crankshaft structure figure that adopts among the embodiment three;
Figure 10 is the air compressor motor rotor structure figure that adopts among embodiment two and the embodiment three;
Figure 11 is the plan view of Figure 10;
Figure 12 is the two row ball bearing assembly assumption diagram that adopts among the embodiment four.
Embodiment
Embodiment one
With reference to figure 2, Fig. 5, Fig. 6 and Fig. 7, a kind of sealed refrigeration compressor that the utility model provides, it has the shell 3 and 6 of sealing, in can, has the motor formed by stator 2 and rotor 5b and by this electric motor driven gas compressing apparatus, gas compressing apparatus comprises cylinder block 30, cylinder 31, valve group 60, cylinder head 70, piston 50, piston rod 40, bent axle 20b, cylinder 31 and cylinder block 30 disjunctors, the crankshaft installed hole is established at cylinder block 30 middle parts, bent axle 20b passes the crankshaft installed hole, the end of bent axle 20b has eccentric shaft 21, piston rod 40 is connected eccentric shaft 21 with pistons 50 in placing cylinder 31, motor stator 2 is fixedly mounted on the cylinder block 30, bent axle 20b has the lubricant oil supply passage: oil-sucking hole 23 → perforation 24 → helical oil groove 25 → tiltedly 26 → eccentric pivot hole 27 of boring a hole, it is characterized in that: suit one biserial ball bearing assembly 15b in the crankshaft installed hole, bent axle 20b passes the inner ring axis hole of two row ball bearing assembly 15b with interference fit, and rotor 5b is by the axis hole 52 covers bent axle 20b that packs into.
As shown in Figure 5, press fit into ball 155 near the upper and lower end parts between the inner ring 152 of two row ball bearing assembly 15b and the outer ring 151, two row ball bearing assembly 15b is press fit on the crankshaft installed hole of cylinder block 30 with interference fit by outer ring upper end 154, and the bent axle 20b that has eccentric shaft 21 presses fit into the inner ring endoporus 152a of two row ball bearing assembly 15b.
With reference to figure 6 and Fig. 7, rotor of the present utility model is a cast-in aluminum squirrel cage formula rotor again, and axis hole 52 is established at the middle part, has the spill port 7b of a perforation near axis hole 52, and the effect of this spill port 7b is to allow provide the lubricant oil of compressor to return housing 3.Oilhole 7b can be that independently through hole also can communicate with the axis hole 52 of rotor 5b, and quantity is not limit.
During compressor operating, motor rotor 5b drives bent axle 20b, bent axle 20b rotation under two row ball bearing assembly 15b supporting, the centrifugal force that bent axle 20b rotation produces drives the lubricant oil that is stored in compressor case 3 bottoms by the oil-sucking hole 23 that is positioned at its lower end afterbody and rises, and the lubricant oil supply passage (23 by bent axle 20a, 24,25,26) take eccentric pivot hole 27 in the eccentric shaft 21 to, and then be transported to the position that compressor need lubricate, the lubricated oil lubrication by returning from cylinder 31 of two row ball bearing assembly 15b is returned housing 3 through the lubricated lubricant oil of two row ball bearing assembly 15b by the spill port 7b on the rotor 5b.
Embodiment two
With reference to figure 3, Fig. 8, Figure 10 and Figure 11, a kind of sealed refrigeration compressor, it has the shell 3 and 6 of sealing, in can, has the motor formed by stator 2 and rotor 5a and by this electric motor driven gas compressing apparatus, gas compressing apparatus comprises cylinder block 30, cylinder 31, valve group 60, cylinder head 70, piston 50, piston rod 40, short bent axle 20a and fuel sucking pipe 1, cylinder 31 and cylinder block 30 disjunctors, the crankshaft installed hole is established at cylinder block 30 middle parts, short bent axle 20a passes the crankshaft installed hole, the end of short bent axle 20a has eccentric shaft 21, piston rod 40 is connected eccentric shaft 21 with pistons 50 in placing cylinder 31, motor stator 2 is fixedly mounted on the cylinder block 30, short bent axle 20a has the lubricant oil supply passage: the helical oil groove 25 → 26 → eccentric pivot hole 27 of tiltedly boring a hole, it is characterized in that: suit one biserial ball bearing assembly 15 in the crankshaft installed hole, short bent axle 20a is fit into the inner ring axis hole of two row ball bearing assembly 15 with interference fit
As Fig. 8, Figure 10 and shown in Figure 11, the Internal and external cycle length difference of two row ball bearing assembly 15, inner ring 152 is longer than outer ring 151, the part 153 that inner ring 152 grows is used to assemble rotor 5a, press fit into ball 155 near the upper and lower end parts between inner ring 152 and the outer ring 151, two row ball bearing assembly 15 is press fit on the crankshaft installed hole of cylinder block 30 with interference fit by outer ring upper end 154, the short bent axle 20a that has eccentric shaft 21 is fitted in the inner ring endoporus upper end 152a of two row ball bearing assembly 15, and being pressed with fuel sucking pipe 1 at 152b place, inner ring endoporus lower end, motor rotor 5a is fixed on outside the part 153 that the inner ring of two row ball bearing assembly 15 extends out.
During compressor operating, thereby motor rotor 5a drives two row ball bearing assembly 15 and drives fuel sucking pipe 1 rotation, rotation produces centrifugal force and drives the lubricant oil rising that is stored in compressor case 3 bottoms, and by the helical oil groove 25 of short bent axle 20a, oblique 26 eccentric pivot holes 27 that take in the eccentric shaft 21 of boring a hole, and then be transported to the position that compressor need lubricate.The lubricated oil lubrication by returning from cylinder 31 of two row ball bearing assembly 15 is returned housing 3 through two row ball bearing assembly 15 lubricated lubricant oil by the oil-return groove on the rotor 5a 7.
Again with reference to figure 8, short bent axle 20a upper end connects eccentric shaft 21 by a balance portion, establish the eccentric pivot hole 27 of opening in the eccentric shaft 21, short bent axle 20a is provided with helical oil groove 25 in leaning to one side, one through hole passes balance portion eccentric pivot hole 27 and helical oil groove 25 upper ends is communicated with, and helical oil groove 25 lower ends are communicated to short bent axle 20a terminal part.
With reference to Figure 10 and Figure 11, rotor of the present utility model is a cast-in aluminum squirrel cage formula rotor again, and axis hole 51 is established at the middle part, has the oil-return groove 7 of a perforation near the axis hole 51 of rotor 5a, and the effect of this oil-return groove 7 is to allow provide the lubricant oil of compressor to return housing 3.Oil groove 7 can communicate with the axis hole 51 of rotor 5a, also can be through hole independently, and quantity without limits.
Embodiment three
With reference to figure 9, with the bent axle 20b that the short bent axle 20a among the embodiment two and fuel sucking pipe 1 replace with embodiment 1, other structure is identical with embodiment two with working method.
Embodiment four
With reference to figure 4, Figure 12, and in conjunction with Fig. 8, Figure 10 and Figure 11.
Present embodiment is another structure of embodiment two, its difference is: the outer ring 151 of two row ball bearing assembly 15 has increased by one and has been used for the flange plate that is threaded hole 157 156 that screw 12 is fixed, and flange plate 156 is fixed on the outer ring 151 of two row ball bearing assembly by interference fit.The characteristics of present embodiment are that this structure does not need two row ball bearing assembly 15 is press-fited in use, but with screw 12 two row ball bearing assembly 15 are fixed on the cylinder block 30.
Same structure also can be used for embodiment one and embodiment three.
Claims (5)
1. sealed refrigeration compressor, it has the shell of sealing, in can, has the motor formed by stator and rotor and by this electric motor driven gas compressing apparatus, gas compressing apparatus comprises cylinder block, cylinder, the valve group, cylinder head, piston, piston rod, bent axle, cylinder and cylinder block disjunctor, the crankshaft installed hole is established at the cylinder block middle part, bent axle passes the crankshaft installed hole, one end of bent axle has eccentric shaft, piston rod is connected eccentric shaft with piston in placing cylinder, motor stator is fixedly mounted on the cylinder block, bent axle has the lubricant oil supply passage, it is characterized in that: suit one biserial ball bearing assembly in the crankshaft installed hole, bent axle passes the inner ring axis hole of two row ball bearing assembly with interference fit, and the rotor cover is packed on the bent axle.
2. sealed refrigeration compressor, it has the shell of sealing, in can, has the motor formed by stator and rotor and by this electric motor driven gas compressing apparatus, gas compressing apparatus comprises cylinder block, cylinder, the valve group, cylinder head, piston, piston rod, bent axle, cylinder and cylinder block disjunctor, the crankshaft installed hole is established at the cylinder block middle part, bent axle passes the crankshaft installed hole, one end of bent axle has eccentric shaft, piston rod is connected eccentric shaft with piston in placing cylinder, motor stator is fixedly mounted on the cylinder block, bent axle has the lubricant oil supply passage, it is characterized in that: suit one biserial ball bearing assembly in the crankshaft installed hole, the inner ring of two row ball bearing assembly goes out one section than outer ring overlength, rotor is set in this overlength section, and bent axle passes the inner ring axis hole of two row ball bearing assembly with interference fit.
3. sealed refrigeration compressor as claimed in claim 2 is characterized in that: described bent axle is not for establishing the short bent axle of oil suction section, and the inner ring axis hole top interference fit of two row ball bearing assembly is inserted short crankshaft end, and the oil suction pipe end is inserted in the bottom.
4. as claim 1 or 2 or 3 described refrigeration compressors, it is characterized in that: the two row ball bearing assembly is installed with interference fit by the crankshaft installed hole on its outer ring and the cylinder block.
5. as claim 1 or 2 or 3 described refrigeration compressors, it is characterized in that: the upper end, outer ring of two row ball bearing assembly adds manages blue circle, and the screw hole that passes the flange circle with set screw is with two row ball bearing assembly and cylinder block fixed installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201889291U CN201255094Y (en) | 2008-08-21 | 2008-08-21 | Sealed type refrigerating compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201889291U CN201255094Y (en) | 2008-08-21 | 2008-08-21 | Sealed type refrigerating compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201255094Y true CN201255094Y (en) | 2009-06-10 |
Family
ID=40738410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201889291U Expired - Lifetime CN201255094Y (en) | 2008-08-21 | 2008-08-21 | Sealed type refrigerating compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201255094Y (en) |
-
2008
- 2008-08-21 CN CNU2008201889291U patent/CN201255094Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: GUANGZHOU WANBAO GROUP COMPRESSOR CO., LTD. Free format text: FORMER OWNER: GUANGZHOU LENGJI CO., LTD. Effective date: 20091204 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20091204 Address after: No. 68, man street, man Town, Baiyun District, Guangdong, Guangzhou: 510470 Patentee after: WanBao Group Compressor Co., Ltd. Address before: No. 12, man street, man Town, Baiyun District, Guangdong, Guangzhou: 510470 Patentee before: Guangzhou Refrigeration Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090610 |
|
| CX01 | Expiry of patent term |