KR0112946Y1 - Oil supplying structure of rotary compressor - Google Patents

Abstract

More specifically, the present invention relates to a refueling structure of a rotary compressor capable of minimizing oil flow resistance and preventing oil backflow, thereby improving reliability of oil supply. Low-temperature and low-pressure refrigerant by a compression mechanism consisting of a rotating shaft that is rotated by an electric transmission unit, an eccentric shaft formed on one side end of the rotating shaft, a roller provided outside the shaft, and a cylinder in which the roller is installed to rotate. In a rotary compressor constituting a compression cycle through a discharge tube for compressing and discharging the gas at a high temperature, high pressure, it is located inside the cylinder formed at one end of the rotary shaft to be reciprocated in close contact with the roller at all times A blade and a blade chamber in which the blade is located; However there will be a first diode is installed to suck the frozen five days received in the lower portion of the casing, and the opposite side is characterized in that a second diode for supplying oil to the oil supply to the connected to the driving side is installed.

Description

Oil supply structure of rotary compressor

1 is a side cross-sectional view of a rotary compressor according to an embodiment of the present invention

2 is an enlarged cross-sectional view of the lubricating oil opening and closing means in FIG.

3 is a front view of a rotating shaft of the rotary compressor in one embodiment of the present invention

4 is a diagram showing a state of lubrication of the rotating shaft in an embodiment of the present invention, (a) is a state when lubrication, (b) is a state diagram when lubrication is blocked

5 is a side cross-sectional view of an oil supply part of a conventional rotary compressor.

* Explanation of symbols for main parts of the drawings

30: casing 38: electric drive

40: frozen oil 42: rotating shaft

44: oil supply means 50: compression mechanism

52: eccentric shaft portion 54: roller

56 cylinder 58 blade

64: blade chamber 66: first diode

68: oil supply passage 70: the second diode

72: oil guide groove

The present invention relates to an oil supply structure of a rotary compressor, and more particularly, to an oil supply structure of a rotary compressor that can minimize oil flow resistance and prevent oil backflow to improve oil supply reliability. Compressors used in refrigeration, refrigerators, and air conditioning systems to keep food at a low temperature or to keep the temperature at a desired temperature in an enclosed space, and to keep the indoor air at an appropriate temperature, have a rotating shaft inside the case. When rotating, oil is supplied to reduce frictional resistance. As a lubrication device of such a rotary compressor, a blade seal is formed in a seal behind the blade of the compression device, and an oil suction hole and an oil discharge hole are formed in the blade seal, and the oil discharge hole has a bearing portion of the compression device. It is generally known to connect oil supply passages for supplying oil. That is, when the blade reciprocating according to the rotation of the rotary shaft operates in the direction of expanding the volume of the blade chamber, oil is sucked into the blade chamber from the oil suction hole, and in the direction of the blade reducing the volume of the blade chamber. There is a rotary compressor shown in FIG. 5, which is configured to discharge oil in a blade chamber from an oil discharge hole to an oil supply passage during operation.

5 (a) is a sectional view of the oil supply section of a conventional rotary compressor, in which a stator 4 is provided inside the casing 2, and the rotor 6 is rotatable inside the stator 4. The transmission means is constituted by a power supply applied to a terminal (not shown).

On the central side of the rotor 6 constituting the transmission means, the rotary shaft 8 is installed to rotate together with the rotor 6. A main bearing 10 is installed at one side of the rotary shaft 8 to support the rotary shaft 8, and an eccentric shaft portion 12 is formed at an end of the rotary shaft 8 to form an inner side of the cylinder 14. Is located.

The outer circumference of the eccentric shaft portion 12 is provided with a roller 16 so as to reciprocate in the cylinder 14 at the same time as the rotation shaft 8 rotates.

The springs 20 are elastically supported in the grooves formed in the radial direction of the cylinder 14 so that the blades 18 can reciprocate while being in close contact with the outer circumference of the roller 16 eccentrically rotating in the cylinder 14. It is installed.

A blade chamber 22 is formed at the rear of the blade 18. The blade chamber 22 serves to inhale and discharge oil as shown in FIG. In order to facilitate the rotational action of (8), the oil supply passage 24 is connected.

The oil supply passage 24 connected to the blade chamber 22 has an end portion connected to one side of the rotation shaft 8 to supply oil, as shown in FIG. 5A. An induction hole 26 for sucking oil when the blade 18 is pushed is provided.

By the way, the oil supply structure of this type is simply pumped by the reciprocating motion of the blade 18, the refrigeration oil 28 of the bottom of the casing (2) flows into the blade chamber 22, and then the oil supply path ( Since the supply amount is not supplied to the rotary shaft 8 through the 24, the necessary supply amount cannot be adjusted, and since the induction hole 26 is always open, the fluid resistance of the blade 18 and the blade chamber 22 is increased. There are various problems that are formed large and cause mechanical loss.

In addition, since the refrigeration oil loaded on the oil supply passage 24 may be flowed back, there is a problem that the oil supply efficiency for lubrication is lowered.

The present invention has been made to solve the various problems of the prior art as described above, the object of the present invention is to provide a refueling structure of the rotary compressor that can minimize the wear and mechanical loss of the rotary shaft by improving the oil supply efficiency.

In order to realize the object as described above, the present invention, the rotating shaft is rotated by a transmission part consisting of a stator and a rotor in a sealed casing, an eccentric shaft portion formed on one side end of the rotating shaft and the outer periphery of the shaft A rotary compressor configured to form a compression cycle through a discharge pipe for compressing and discharging low-temperature and low-pressure refrigerant gas at a high temperature and a high pressure by means of a compression mechanism comprising a roller and a cylinder in which the roller is reciprocated. It is located inside the cylinder installed at the end and is elastically supported by a spring, so that it has a blade reciprocating in close contact with the roller at all times, and a blade chamber in which the blade is located, and at one end of the blade chamber, a refrigeration housed in the lower portion of the casing The first diode for sucking oil is provided, on the opposite side of the drive section It characterized in that the second diode for supplying oil to the oil supply passage connected to.

In the rotary compressor oil supply structure of the present invention configured as described above, as the rotating side rotates and the roller rotates inside the cylinder, the refrigerant gas is compressed and discharged. In this case, the blade interlocked with the driving of the compression mechanism is the volumetric capacity of the blade chamber. Variable oil is sucked into the refrigeration oil when the capacity is increased and the refrigeration oil is compressed and sent to the drive unit when the capacity is reduced, and the oil is supplied only when the oil induction groove formed on the rotating shaft coincides with the oil passage. Supply can be cut off.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a side cross-sectional view of a rotary compressor according to an embodiment of the present invention, the casing 30 is provided with an external power supply terminal 32 is to make an electrical connection to the stator 34 installed inside. .

The stator 34 constitutes a transmission part 38 together with the rotor 36 rotatably installed in the inside thereof, and the refrigeration oil 40 flows in a predetermined amount inside the lower end of the casing 30. have. The refrigeration oil (40) is supplied to the rotating shaft (42) located inside the rotor (36) and is provided with oil supply means (44) to solve the problems caused by frictional heat and wear caused by mechanical friction. have.

The oil supply means 44 is operated by a compression mechanism 50 provided between the main bearing 46 and the auxiliary bearing 48 located at one end of the rotation shaft 42.

The compression mechanism (50) includes an eccentric shaft portion (52) mounted at one end of the rotary shaft (42), a roller (54) provided outside the eccentric shaft portion (52), and these eccentric shaft portions (52) and rollers (54). ), And the oil supply means 44 includes a blade 58 installed inside the cylinder 56 and the blade 58 as shown in FIGS. 1 and 2. It is comprised by the spring 60 applied so that it may contact always in close contact with the roller 54. As shown in FIG.

The spring 60 has a structure in which one end can be fixed to a groove formed in the blade 58, and the other end has a structure installed in the spring sheet 62.

In the blade chamber 64 in which the blade 58 is located, one end portion communicates with the lower portion of the casing 30 containing the refrigeration oil 40 through the first diode 66, and the other end portion is an oil supply passage ( It communicates with the eccentric shaft part 52 of the rotating shaft 42 through 68.

Between the blade chamber 64 and the oil passage 68, the first diode 66 to introduce the refrigeration oil 40 into the blade chamber 64 and the refrigeration oil introduced to the blade chamber 64 are rotated ( A second diode 70 for lubricating 42 is mounted.

The oil supply passage 68 is not connected to the center of one end portion of the rotation shaft 42 but is connected to the peripheral portion.

The oil supply passage 68 is eccentrically connected in this way because the oil guide groove 72 formed on the outer circumference of the rotary shaft 42 is located at one side, as shown in FIG. When it coincides with the groove 72, the oil generated at the oil feed back end 44 is supplied to the drive unit, and when it does not match, the oil supply to the drive unit is cut off.

In the drawings, reference numerals 74 and 76 denote suction tubes for introducing refrigerant gas and discharge tubes for discharging the refrigerant gas to the high pressure side.

In the rotary compressor oil supply structure of the present invention thus constructed, when power is applied to the electric motor 38 through the terminal 15, the rotor 36 located inside the stator 34 rotates.

At this time, since the rotating shaft 42 fixedly installed in the rotor 36 starts to rotate together, the eccentric shaft portion 52 formed at one end of the rotating shaft 42 is rotated by the rotational force, and the roller 54 is located there. ) Rotates reciprocating linear motion in the cylinder (56).

Due to this action, the refrigerant gas flows into the suction pipe 74 and is compressed and discharged into the casing 30. At the same time, the high pressure refrigerant gas discharged into the casing 30 is discharged into the discharge tube 76 to circulate the refrigerant cycle. Done.

At this time, if the blade 58 in contact with the roller 54 together with the compression mechanism 50 reciprocates together and the blade 58 rises, the volume capacity of the blade chamber 64 increases, so that negative pressure is Is formed.

This negative pressure causes the first diode 66 to be pushed into the chamber. At this time, the refrigeration oil 40 located in the lower portion of the casing 30 is rapidly introduced into the blade chamber (64).

When this action is made and the blade 58 comes back to the lowered position, the capacity of the blade chamber 64 is reduced, so the refrigeration oil 40 introduced therein is compressed to increase the pressure in the chamber 64. do.

At this time, the second diode 70 is pushed outward by the rising pressure, thereby feeding the refrigeration oil 40 to the oil supply passage 68.

This action occurs repeatedly while the rotating shaft 42 is rotating, wherein the refrigeration oil 40, which is raised through the oil supply passage 68, supplies or blocks oil to the driving unit depending on the position of the rotating shaft 42. Done.

That is, as shown in FIG. 4A, in the state where the oil guide groove 72 of the rotation shaft 42 coincides with the oil supply passage 68, the oil of the oil supply passage 68 is supplied to the rotation shaft 42, On the contrary, as shown in FIG. 4B, when the oil guide groove 72 of the rotary shaft 42 does not coincide with the oil passage 68, the supply of oil is blocked.

As described above, the lubrication structure of the rotary compressor according to the present invention is that the rotating shaft rotates so that the roller reciprocates inside the cylinder, and the refrigerant gas is compressed and discharged. The oil is supplied only when the oil induction groove formed on the rotating shaft coincides with the oil supply passage. Since it is configured to cut off the supply, it is possible to minimize oil supply loss due to overload and oil backflow due to the overload of oil, which is inherent in the conventional rotary compressor, and improve oil supply efficiency to reduce wear and mechanical loss of the rotating shaft. There is an excellent effect of minimizing.

Claims (1)

In the lubricating structure of the rotary compressor including a blade which is installed on one side of the cylinder and supplying oil to the rotating shaft while reciprocating in the blade chamber, oil is introduced into the blade chamber while the blade is opened during the suction operation and closed during the discharge operation. A first diode installed in the casing, a second diode installed opposite to the first diode and connected to the oil passage so as to be opened during the discharge operation of the blade and closed during the suction operation, and discharged when the second diode is opened; Oil supply structure of the rotary compressor, characterized in that it comprises an oil guide groove formed in the rotary shaft so that the supplied oil is intermittently supplied to the rotary shaft in accordance with the rotation angle of the fuel passage and the rotary shaft.