CN210919779U

CN210919779U - Crankshaft applied to high-load fixed-frequency compressor

Info

Publication number: CN210919779U
Application number: CN201921832966.6U
Authority: CN
Inventors: 关晓杰
Original assignee: Jiaxing Lifeng Machinery Manufacturing Co ltd
Current assignee: Jiaxing Lifeng Machinery Manufacturing Co ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-07-03
Anticipated expiration: 2029-10-29

Abstract

The utility model discloses a be applied to bent axle that high load fixed frequency compressor used, including the power shaft, the bottom surface fixedly connected with upper shaft of power shaft, the lower part fixedly connected with of upper shaft surface goes up the crank arm, and the inside of going up the crank arm articulates there is the axis, and the lower part of axis surface articulates there is lower crank arm, and the inside fixedly connected with lower axle of lower crank arm, lower axle run through down the crank arm and extend to the lower part of crank arm down, go up the crank arm and keep away from centraxonial one end threaded connection and have counter weight body down with last counter weight body lower crank arm, go up the crank arm and keep away from centraxonial one end fixedly connected with. The utility model discloses a counter weight material has used the great bearing block of proportion, and the reduction of counter weight volume also means the volume reduction of compressor crankcase to reduce compressor overall cost, solved prior art stability not good, technical problem such as the noise is big has stability good, and the noise is little, long service life's advantage.

Description

Crankshaft applied to high-load fixed-frequency compressor

Technical Field

The utility model relates to a compressor crankshaft field, in particular to be applied to bent axle that high load fixed frequency compressor used.

Background

The compressor is a driven fluid machine for raising low-pressure gas into high-pressure gas, and is a heart of refrigeration system, and is characterized by that it can suck low-temperature low-pressure refrigerant gas from air suction pipe, and utilizes the operation of motor to drive piston to compress it, and then discharges high-temperature high-pressure refrigerant gas into exhaust pipe to provide power for refrigeration cycle. Therefore, the crankshaft connecting rod mechanism is the main mechanism of the compressor, and the performance and the structure of the crankshaft connecting rod mechanism are directly related to the working performance of the compressor. The mounting accuracy of the crankshaft connecting rod mechanism and the stability of the operation are therefore very important.

The existing crankshafts for some small compressors need firm and firm foundation due to poor balance in the use process, and also vibrate, have high power consumption and bring inconvenience to installation, use and maintenance of customers. To solve the problem of balance, the best method is to add a balance weight on the crankshaft of the compressor, thereby increasing the whole size of the compressor, greatly increasing the cost of the compressor, and the structure ensures that the crankshaft has larger shake in use, which is not only harmful to the stability and the service life of the crankshaft, but also has the defect of larger noise.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide, to solve among the above-mentioned background art the kind be applied to the high load and decide the bent axle that the frequency compressor used stable low, the life weak point and the big problem of noise of going.

In order to achieve the above object, the utility model provides a following technical scheme: a crankshaft applied to a high-load fixed-frequency compressor comprises a power shaft, an upper shaft is fixedly connected to the bottom surface of the power shaft, an upper crank arm is fixedly connected to the lower portion of the outer surface of the upper shaft, a middle shaft is hinged to the inside of the upper crank arm, a lower crank arm is hinged to the lower portion of the outer surface of the middle shaft, a lower shaft is fixedly connected to the inside of the lower crank arm, the lower shaft penetrates through the lower crank arm and extends to the lower portion of the lower crank arm, an upper counterweight body is in threaded connection with one end, away from the middle shaft, of the upper crank arm, a lower counterweight body is in threaded connection with one end, away from the middle shaft, of the lower crank arm, a connecting portion is fixedly connected to one end, away from the middle shaft, of the connecting portion, one end, away from a counterweight, the one end that connecting portion were kept away from to the counter weight installation shell has seted up two symmetrical nut mounting holes, every the inside equal threaded connection of nut mounting hole has the bolt, every the bolt all runs through counter weight installation shell and screw hole threaded connection, the circular port has been seted up at the middle part of going up the crank arm.

Preferably, the middle part of the outer surface of the middle shaft is hinged with a connecting rod, one end, far away from the middle shaft, of the connecting rod is provided with a connecting shaft hole, the connecting rod converts the rotary motion into reciprocating motion, the work of the compressor is efficiently realized, and the space and the cost are saved.

Preferably, an oil storage tank is arranged in the middle shaft, the oil storage tank is of a groove shape, lubricating oil is stored in the oil storage tank, dry friction is generated between the middle shaft and the connecting rod when the middle shaft operates, if some friction parts cannot be lubricated properly, parts can be damaged or even blocked, the lubricating oil in the oil storage tank can lubricate the friction parts, the service life is prolonged, and noise can be reduced.

Preferably, the fixed intercommunication of upper surface of oil storage tank has last crank arm oil circuit, the one end of going away from the oil storage tank of last crank arm oil circuit is with the fixed intercommunication of last crank arm, can make the lubricating oil in the oil storage tank flow in the inside wall of upper crank arm like this, has lubricated effect, the noise reduction of friction.

Preferably, the fixed intercommunication in bottom of oil storage tank has lower crank oil circuit, the one end that the oil storage tank was kept away from to lower crank oil circuit is with the fixed intercommunication of lower crank arm, can make the lubricating oil in the oil storage tank flow in the inside wall of lower crank arm like this, has lubricated effect, and the noise reduction that reduces friction reduces the mechanical energy of loss because of the friction to raise the efficiency.

Preferably, the right side of the oil storage tank is fixedly communicated with a middle shaft oil way, one end, far away from the oil storage tank, of the middle shaft oil way is fixedly communicated with the connecting shaft hole, and the weight of the connecting rod is reduced through the middle shaft oil way, so that the energy consumption of the connecting rod is reduced in operation.

Preferably, the upper shaft and the lower shaft are coaxial shafts, the upper crank arm and the lower crank arm are the same in shape, the coaxiality can ensure the precision of the crankshaft in operation, the friction loss of the upper shaft and the lower shaft to the middle shaft is reduced, and the service life of the compressor is prolonged.

The utility model discloses a technological effect and advantage:

the utility model discloses a because the great bearing block of proportion has been used to the counter weight material for the counter weight reduces wholly, and the reduction of counter weight volume also means the volume reduction of compressor crankcase, thereby reduces the whole cost of compressor, and it is not good to have seted up the stability that the oil storage tank has solved prior art and has existed, and the noise waits technical problem greatly, has realized that a stability is good, and the noise is little, long service life, processing convenient compressor crankshaft link mechanism.

The utility model discloses a set up the connecting rod and turn into reciprocating motion with rotary motion, space and cost are saved to the work of efficient realization compressor, the axis can produce dry friction with the connecting rod when the operation, if some friction positions can not obtain suitable lubrication, will cause the damage of parts to block even die, lubricating oil in the oil storage tank can lubricate the friction position, increase of service life can the noise reduction moreover, and the precision of bent axle in the operation can be guaranteed to the axiality, reduces the friction loss that upper shaft and lower shaft brought for the axis, makes compressor life improve.

Drawings

Fig. 1 is an overall schematic view of the structure of the present invention.

Fig. 2 is a right side view of the structure of the present invention.

Fig. 3 is a schematic cross-sectional view of the crank arm of the present invention.

Fig. 4 is a schematic sectional view of the oil path structure of the present invention.

In the figure: 1. a power shaft; 2. an upper shaft; 3. an upper counterweight body; 4. a lower counterweight body; 5. a lower shaft; 6. an upper crank arm; 7. a connecting rod; 8. a middle shaft; 9. a shaft connecting hole; 10. a lower crank arm; 11. a circular hole; 12. a threaded hole; 13. a connecting portion; 14. a nut mounting hole; 15. a counterweight mounting housing; 16. a balancing weight; 17. a bolt; 18. an upper crank arm oil circuit; 19. an oil storage tank; 20. a lower crank oil path; 21. the axis oil circuit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a bent axle that is applied to high load constant frequency compressor that kind as shown in fig. 1-4 is shown by fig. 1, including power shaft 1, the bottom surface fixedly connected with upper shaft 2 of power shaft 1, the lower part fixedly connected with upper crank arm 6 of upper shaft 2 surface, the inside of upper crank arm 6 articulates there is axis 8, the lower part of axis 8 surface articulates there is lower crank arm 10, the inside fixedly connected with lower axle 5 of lower crank arm 10, lower axle 5 runs through lower crank arm 10 and extends to the lower part of lower crank arm 10, the threaded connection of the one end of connecting portion 13 that keeps away from balancing weight 16 has counter weight installation shell 15, the internally mounted balancing weight 16 of counter weight installation shell 15, the one end of counter weight installation shell 15 that keeps away from connecting portion 13 is seted up two symmetrical nut mounting holes 14, the equal threaded connection has bolt 17 in the inside of each nut mounting hole 14, each bolt 17 all runs through counter weight installation shell, the middle part of the outer surface of the middle shaft 8 is hinged with a connecting rod 7, one end, far away from the middle shaft 8, of the connecting rod 7 is provided with a connecting shaft hole 9, the connecting rod 7 converts the rotary motion into reciprocating motion, the work of the compressor is efficiently realized, and the space and the cost are saved.

Shown by fig. 2, the one end threaded connection that the axis 8 was kept away from to last crank arm 6 has last counter weight body 3 and the one end threaded connection that the axis 8 was kept away from to crank arm 10 has lower counter weight body 4 down, the one end fixedly connected with connecting portion 13 that the axis 8 was kept away from to last crank arm 6, connecting portion 13 keeps away from the one end of balancing weight 16 and has seted up two symmetrical screw holes 12, circular port 11 has been seted up at the middle part of going up crank arm 6, oil storage tank 19 has been seted up to axis 8's inside, oil storage tank 19 is the flute profile, the inside storage of oil storage tank 19 has lubricating oil, axis 8 when the operation, can produce dry friction with connecting rod 7, if some friction position can not obtain suitable lubrication, will cause the damage of parts or even card die, the lubricating oil in the oil storage.

As shown in figure 3, the fixed intercommunication of upper surface of oil storage tank 19 has last crank arm oil circuit 18, the one end of keeping away from oil storage tank 19 of last crank arm oil circuit 18 and the fixed intercommunication of last crank arm 6, can make the lubricating oil in the oil storage tank 19 flow in the inside wall of last crank arm 6 like this, there is lubricated effect, reduce the friction noise reduction, the fixed intercommunication of bottom of oil storage tank 19 has lower crank oil circuit 20, the one end that oil storage tank 19 was kept away from to lower crank oil circuit 20 is with the fixed intercommunication of lower crank arm 10, can make the lubricating oil in the oil storage tank 19 flow in the inside wall of lower crank arm 10 like this, there is lubricated effect, reduce the friction noise reduction, reduce the mechanical energy because of the friction loss, thereby the efficiency is.

As shown in fig. 4, a middle shaft oil path 21 is fixedly communicated with the right side of the oil storage tank 19, one end of the middle shaft oil path 21, which is far away from the oil storage tank 19, is fixedly communicated with the connecting shaft hole 9, the weight of the connecting rod 7 is reduced by the middle shaft oil path 21, so that the energy consumption of the connecting rod 7 in operation is reduced, the upper shaft 2 and the lower shaft 5 are coaxial shafts, the shapes of the upper crank arm 6 and the lower crank arm 10 are the same, the coaxiality can ensure the precision of the crankshaft in operation, the friction loss of the upper shaft 2 and the lower shaft 5 to the middle shaft 8 is reduced, and the service.

This practical theory of operation:

this device is at work, at first power shaft 1 drives upper shaft 2 and rotates, upper shaft 2 drives upper crank arm 6 and operates, upper crank arm 6 drives axis 8 simultaneously and realizes reciprocating motion, axis 8 drives connecting rod 7 and realizes the compression motion, in equipment operation, balancing weight 16 in counter weight installation shell 15 can guarantee equipment operating stability, the lubricated improve equipment life to axis 8 can be realized to the oil storage tank 19 that axis 8 set up, when the lubricating oil in the oil storage tank 19 is not enough, add from axis 8 can, axis oil circuit 21 can guarantee the lubricated effect in the axle hole 9 simultaneously, the noise reduction, and stability is improved.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. A crankshaft applied to a high-load fixed-frequency compressor comprises a power shaft (1), and is characterized in that: an upper shaft (2) is fixedly connected to the bottom surface of the power shaft (1), an upper crank arm (6) is fixedly connected to the lower portion of the outer surface of the upper shaft (2), a middle shaft (8) is hinged to the inside of the upper crank arm (6), and a lower crank arm (10) is hinged to the lower portion of the outer surface of the middle shaft (8);

a lower shaft (5) is fixedly connected to the inner part of the lower crank arm (10), the lower shaft (5) penetrates through the lower crank arm (10) and extends to the lower part of the lower crank arm (10), an upper counterweight body (3) is connected to one end, far away from the middle shaft (8), of the upper crank arm (6) in a threaded manner, and a lower counterweight body (4) is connected to one end, far away from the middle shaft (8), of the lower crank arm (10) in a threaded manner;

go up crank arm (6) and keep away from one end fixedly connected with connecting portion (13) of axis (8), two symmetrical screw holes (12) have been seted up to the one end that balancing weight (16) were kept away from in connecting portion (13), the one end threaded connection that balancing weight (16) were kept away from in connecting portion (13) has counter weight installation shell (15), the internally mounted of counter weight installation shell (15) has balancing weight (16), two symmetrical nut mounting holes (14) have been seted up to the one end that connecting portion (13) were kept away from in counter weight installation shell (15), every nut mounting hole (14) inside equal threaded connection has bolt (17), every bolt (17) all run through counter weight installation shell (15) and screw hole (12) threaded connection, circular port (11) have been seted up in the middle part of last crank arm (6).

2. The crankshaft applied to the high-load constant-frequency compressor as claimed in claim 1, wherein: the middle part of the outer surface of the middle shaft (8) is hinged with a connecting rod (7), and one end, far away from the middle shaft (8), of the connecting rod (7) is provided with a connecting shaft hole (9).

3. The crankshaft applied to the high-load constant-frequency compressor as claimed in claim 1, wherein: an oil storage tank (19) is formed in the middle shaft (8), and the oil storage tank (19) is groove-shaped.

4. A crankshaft for a high load constant frequency compressor according to claim 3, wherein: the upper surface of the oil storage groove (19) is fixedly communicated with an upper crank arm oil way (18), and one end, far away from the oil storage groove (19), of the upper crank arm oil way (18) is fixedly communicated with the upper crank arm (6).

5. A crankshaft for a high load constant frequency compressor according to claim 3, wherein: the bottom of the oil storage groove (19) is fixedly communicated with a lower crank oil way (20), and one end, far away from the oil storage groove (19), of the lower crank oil way (20) is fixedly communicated with the lower crank arm (10).

6. A crankshaft for a high load constant frequency compressor according to claim 3, wherein: the right side of the oil storage tank (19) is fixedly communicated with a middle shaft oil way (21), and one end, far away from the oil storage tank (19), of the middle shaft oil way (21) is fixedly communicated with the shaft connecting hole (9).

7. The crankshaft applied to the high-load constant-frequency compressor as claimed in claim 1, wherein: the upper shaft (2) and the lower shaft (5) are coaxial shafts, and the upper crank arm (6) and the lower crank arm (10) are identical in shape.