JP2004036516A - Gas compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas compressor for preventing the leakage of a lubricating oil onto a clutch friction surface of an electromagnetic clutch. <P>SOLUTION: A radial oil spill hole 56b is provided ranging from the inner periphery to the outer periphery of a motor side rotating member 56 of the electromagnetic clutch 50. When a trace of lubricating oil is leaked from a mechanical seal 44 sealing between a front head 5 and a rotor shaft 40 to be rotated into the electromagnetic clutch 50, the leaked lubricating oil is guided into the oil spill hole 56b and then forcibly discharged with centrifugal force. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a gas compressor that is driven to rotate via an electromagnetic clutch.
[0002]
[Prior art]
In a gas compressor that compresses gas by mechanical rotation, such as a vane-type gas compressor, rotational power is transmitted from an engine, a motor, or the like via an electromagnetic clutch.
[0003]
An example of a vane type gas compressor will be described with reference to FIG. The gas compressor 1 is provided with an electromagnetic clutch 50 on one side. The electromagnetic clutch 50 has a ring-shaped electromagnet 51, a driving pulley 52, a bearing 53, an armature plate 54, and a driven-side rotating member 55.
[0004]
The magnetic flux of the electromagnet 51 passes through the driving pulley 52, attracts the armature plate 54, and is attracted to the end face 52 a of the driving pulley 52. The bearing 53 rotatably holds the driving pulley 52 concentrically with the electromagnet 51. The driven side rotation member 55 is connected to the rotor shaft 40, and holds the armature plate 54 so as to be movable in the axial direction and integrally in the rotation direction.
[0005]
During the rotation of the engine, the driving pulley 52 is constantly driven to rotate by the belt 60.
[0006]
The electromagnet 51 of the electromagnetic clutch 50 is fixed to the front head 5 of the gas compressor 1, and the driving pulley 52 is rotatably mounted on the front head 5 of the gas compressor 1 via a bearing 53 so as to be concentric with the electromagnet 51. It is held in a shape.
[0007]
When the gas compressor 1 is operated, the electromagnet 51 is energized and excited, the armature plate 54 is attracted to the end surface 52a of the driving pulley 52 by electromagnetic force, and the armature plate is frictionally generated between the end surface 52a and the armature plate 54. 54 rotates integrally with the driving pulley 52 to rotate the rotor shaft 40 of the compressor body 10.
[0008]
When the operation of the gas compressor 1 is stopped, the energization of the electromagnet 51 is cut off. The armature plate 54 is separated from the end face 52a of the driving pulley 52 by a spring (not shown), and the rotation power of the armature plate 54 and the rotor shaft 40 is cut off and stopped.
[0009]
In FIG. 4, the compressor body 10 is provided with a rotor 41 integrated with the rotor shaft 40, and a vane 42 which rotates in the cylinder chamber 2 while sliding in a radial groove of the rotor 41. The rotation of the rotor 41 and the vane 42 compresses the gas in the cylinder chamber 2.
[0010]
The compressed gas is discharged into the discharge chamber 3, sent out from the discharge port 3 a to a piping system such as a car air conditioner (not shown), returned from the suction port 4 a to the suction chamber 4, and sucked into the cylinder chamber 2 again. ing.
[0011]
In the compressor body 10, when the rotor 41 rotates and performs a compression operation, the rotor 41, the vane 42, the side blocks 6, 7 and the cylinder chamber 2 slide with each other, and the rotor shaft 40 and its bearings 8, 9 Slides, the lubricating oil in the oil reservoir 3b is supplied to these sliding portions. That is, due to the gas pressure in the discharge chamber 3, the lubricating oil in the oil sump 3b is supplied to the sliding portion of the compressor body 10 through the oil passage 43 to lubricate, and exits to the cylinder chamber 2 together with the compressed gas. 3 and return to the oil sump 3b for circulating use.
[0012]
Since the inside of the compressor is at a high pressure, a mechanical seal 44 is provided so that lubricating oil does not leak from a gap between the rotor shaft 40 and an opening of the front head 5 through which the rotor shaft 40 passes.
[0013]
The leakage of the lubricating oil from the compressor body 10 to the electromagnetic clutch 50 side is almost stopped by the mechanical seal 44. However, since some leakage of the lubricating oil due to long-term use is inevitable, a pocket 45 is provided at the tip of the front head 5, and the lubricating oil that has leaked into this pocket 45 is discharged from the oil drain 46 to the outside. I have.
[0014]
However, when the mechanical seal 44 is worn out or the oil drainage passage 46 is clogged for a long time, the leakage of the leaked lubricating oil from the pocket 45 and the oil drainage passage 46 may not be enough. In this case, the leaked lubricating oil flows to the friction surfaces 52a and 54 of the electromagnetic clutch, causing a problem that clutch slip occurs and normal operation cannot be performed.
[0015]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and provides a gas compressor in which lubricating oil does not leak to a clutch friction surface of an electromagnetic clutch.
[0016]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a front head surrounding a compressor body, a rotor shaft of the compressor body penetrating an opening of the front head, and a gap between the rotor shaft and the opening. A sealing portion for rotatably sealing the rotor shaft, a driving-side rotating member provided on the front head concentrically with the rotor shaft and rotatably held by the front head, a driven-side rotating member connected to the rotor shaft, and An electromagnetic clutch provided between the driving side rotating member and the driven side rotating member, the armature plate frictionally coupling the two rotating members with each other by electromagnetic force, and radially provided on the armature plate side of the driving side rotating member. And an oil escape hole.
[0017]
In the above invention, a ring is provided on the inner periphery of the driving side rotating member closer to the armature plate than the inner peripheral opening of the oil escape hole, and this ring forms a wall for preventing lubricating oil from leaking to the armature plate side. By doing so, it is possible to more reliably prevent the lubricating oil from flowing out to the friction surface side of the electromagnetic clutch.
[0018]
Furthermore, if a plurality of oil escape holes are provided at equal pitch intervals, and a line connecting the inner peripheral side openings of adjacent oil escape holes is located outside the inner periphery of the ring, the driving side rotating member is Even when stopped, the lubricant does not overflow to the frictional surface side of the electromagnetic clutch beyond the lubricant leakage prevention wall.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0020]
FIG. 1 is a longitudinal sectional view of an electromagnetic clutch part of a gas compressor showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG. 1 and 2, the same parts as those of FIG. 4 are denoted by the same reference numerals, and the description thereof will be omitted. Also, in FIG. 1, the oil discharge passage from the pocket 45 to the outside is not shown.
[0021]
In the gas compressor of FIGS. 1 and 2, an engine shaft (not shown) serving as a driving source is disposed coaxially with the electromagnetic clutch 50 on the right side of the electromagnetic clutch 50, and a connection hole of a driving-side rotating member 56 of the electromagnetic clutch 50. The pin on the engine shaft side is inserted into 56a, and the rotational power is transmitted.
[0022]
The front head 5 is fastened to a case 11 surrounding the outer periphery and the rear end side of the compressor body 10 by bolts (not shown), and surrounds the compressor body 10 together with the case 11. The mechanical seal 44 is a seal portion that seals a gap between the rotor shaft 40 and the opening of the front head 5 so as to be relatively rotatable.
[0023]
As shown in FIG. 2, on the armature plate 54 side of the driving side rotating member 56, a plurality of oil escape holes 56b, 56b are arranged radially and at equal pitches from the central space 56c of the driving side rotating member 56 toward the outer periphery. As described in detail below, the lubricating oil of the compressor 1 leaking from the seal portion 44 is guided to the oil escape hole 56b and discharged.
[0024]
Slots 56d, 56d for forming a magnetic circuit between the electromagnet 51 and the armature plate 54 are provided between the oil release holes 56b, 56b. That is, the oil escape hole 56b is provided so as to avoid the slot 56d, and the oil escape hole 56b directly communicates from the central space 56c to the outer periphery without opening halfway.
[0025]
A ring 57 is provided on the inner periphery of the driving side rotating member 56 (see FIG. 1) closer to the armature plate 54 than the opening 56ba on the driving side rotating member central space 56c side of the oil release hole 56b. The ring 57 forms a lubricating oil leakage preventing wall that prevents the lubricating oil leaking into the central space 56c from flowing to the electromagnetic clutch friction surfaces 52a, 54 side. This is because during the rotation of the driving-side rotating member 56 where leakage of lubricating oil tends to increase, the lubricating oil leaked into the central space 56c adheres to the inner periphery of the driving-side rotating member 56 due to centrifugal force, and the ring 57 adheres to this. This is because the lubricating oil is blocked and the lubricating oil accumulates on the lower surface due to gravity while the driving-side rotating member 56 is stopped, and the ring 57 blocks the accumulated lubricating oil.
[0026]
The blocked lubricating oil is discharged outside through the oil escape hole 56b. During the rotation of the driving-side rotating member 56, the lubricating oil in the oil escape hole 56b is forcibly discharged by centrifugal force. While the driving-side rotating member 56 is stopped, the oil is discharged from the oil release hole 56b on the lower side by gravity. The line X connecting the inner peripheral openings 56ba, 56ba of the adjacent oil escape holes 56b, 56b is set outside the inner periphery 57a of the ring 57 (see FIG. 2). The oil is discharged from the oil escape hole 56b before the oil level exceeds the lubricating oil leakage prevention wall of the ring 57.
[0027]
Further, by providing the ring 57, foreign matter such as abrasion powder generated from the friction surfaces 52a and 54 of the electromagnetic clutch enters the central space 56c beyond the lubricating oil leakage prevention wall of the ring 57, and together with the lubricating oil. There is no danger of entering the oil escape hole 56b and closing the hole.
[0028]
In this embodiment, the ring 57 is press-fitted into the driving-side rotating member 56. However, the ring 57 may be fixed by another method or may be formed integrally with the driving-side rotating member 56.
[0029]
In the embodiments shown in FIGS. 1 and 2, the present invention is applied to a coaxial drive type gas compressor, but the present invention can also be applied to a belt drive type gas compressor.
[0030]
FIG. 3 shows an embodiment of a belt-driven gas compressor. FIG. 3 is a longitudinal sectional view of an electromagnetic clutch portion of the belt-driven gas compressor. 3, the same parts as those in FIGS. 1 and 4 are denoted by the same reference numerals, and description thereof will be omitted.
[0031]
The driving-side rotating member is a pulley 58, and a belt is wound around the pulley 58 and an engine shaft (not shown) so that the rotational power of the engine is transmitted to the pulley 58.
[0032]
In this embodiment, a ring 58e provided on the armature plate 54 side with respect to the oil release holes 58b at radial and equal pitch intervals is cut out integrally with the pulley 58.
[0033]
In the embodiment of FIG. 3, similarly to the embodiments of FIGS. 1 and 2, when the lubricating oil leaked from the seal portion 44 flows into the central space 58c, the leaked lubricating oil is discharged from the oil escape hole 58b. Therefore, the oil does not flow to the friction surfaces 52a and 54 of the electromagnetic clutch beyond the lubricant oil leakage preventing wall of the ring 58e. In addition, foreign matter such as abrasion powder generated from the friction surfaces 52a and 54 of the electromagnetic clutch enters the central space 58c beyond the lubricating oil leakage prevention wall of the ring 58e, enters the oil escape hole 58b together with the lubricating oil, and cuts the hole. There is no danger of blocking.
[0034]
It should be noted that the ring provided in the above-described embodiment may be omitted if the expected leakage speed of the lubricating oil is low and the oil escape hole has sufficient clearance for discharging the lubricating oil.
[0035]
In the above-described embodiment, the oil release hole is formed in the driving side rotating member. However, a groove serving as an oil release hole is formed in the end surface of the rotating member on the armature plate side, and the friction surface of the electromagnetic clutch is formed on this end surface. The driving side rotating member can be formed by fixing the thin disk provided with the grooved rotating member and the disk. In this case, a slot for forming a magnetic circuit, which communicates with the grooved rotating member and the disk, is provided.
[0036]
【The invention's effect】
As described in detail above, according to the present invention, when the lubricant of the compressor leaks from the seal portion sealing the gap between the front head and the rotor shaft and flows out into the electromagnetic clutch, the leaked lubricant is removed by the oil. Since the oil is guided to the escape hole and discharged, the leakage of the lubricating oil to the clutch friction surface between the armature plate and the driving side rotating member is prevented, and the occurrence of clutch slip due to the oil can be prevented.
[0037]
Further, if a ring forming a lubricating oil leakage preventing wall is provided on the inner periphery of the driving side rotating member on the armature plate side than the inner peripheral side opening of the oil releasing hole, leakage lubrication before the oil is discharged from the oil releasing hole. Oil collects in an annular shape on the inner peripheral surface of the driving-side rotating member due to the centrifugal force of the rotating driving-side rotating member, thereby making it more difficult for oil to leak to the friction surface of the clutch, and foreign matters such as abrasion powder generated from the friction surface of the electromagnetic clutch. Can be prevented from entering the oil escape hole and closing the hole.
[0038]
In addition, if the line connecting the inner peripheral side openings of the adjacent oil release holes is located outside the inner periphery of the ring, even when the driving side rotating member is stopped, the oil release hole The leaked lubricating oil before being discharged does not cross the ring wall and leak to the clutch friction surface.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view (a II section in FIG. 2) of a main part showing an embodiment of the present invention.
FIG. 2 is a view taken in the direction of arrows II-II in FIG.
FIG. 3 is a vertical sectional view of a main part showing another embodiment of the present invention.
FIG. 4 is a longitudinal sectional view showing a conventional gas compressor.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Gas compressor 5 Front head 10 Compressor body 11 Case 40 Rotor shaft 44 Mechanical seal (seal part)
45 pocket 50 electromagnetic clutch 51 electromagnet 53 bearing 54 armature plate 55 driven side rotating member 56 driven side rotating member 56b oil escape hole 56ba opening 56c central space 56d slot 57 ring 57a ring inner circumference 58 pulley (driving side rotating member)
58b Oil escape hole 58c Central space 58e Ring X Line connecting inner peripheral side openings 56ba, 56ba

Claims (3)

A front head surrounding the compressor body,
A rotor shaft of the compressor body penetrating through the opening of the front head,
A seal portion for sealing the gap between the rotor shaft and the opening so as to be relatively rotatable;
A driving-side rotating member provided on the front head concentrically with the rotor shaft and rotatably held by the front head, a driven-side rotating member connected to the rotor shaft, and the driving-side rotating member and the driven-side rotating member An electromagnetic clutch provided with an armature plate provided between and for frictionally coupling the two rotating members by an electromagnetic force,
An oil escape hole radially provided on the armature plate side of the driving side rotating member,
A gas compressor comprising: 2. A ring is provided on the inner periphery of the driving side rotating member closer to the armature plate than the inner peripheral opening of the oil escape hole, and the ring forms a wall for preventing lubricating oil from leaking to the armature plate side. Gas compressor. 3. The gas compressor according to claim 2, wherein a plurality of oil escape holes are provided at equal pitch intervals, and a line connecting the inner peripheral side openings of the adjacent oil escape holes is outside the inner periphery of the ring.

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