JPH0740708Y2 - Leaked oil absorber of compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a leakage oil absorption device for a compressor, for example, a leakage oil absorption device provided in a vane type rotary compressor used for refrigerant compression of an air conditioner for automobiles. Regarding

(Prior Art) Generally, a shaft sealing device is interposed between a head cover of a compressor and a rotor shaft penetrating the head cover to seal the inside of the compressor. A leakage oil absorbing device is provided near the shaft sealing device so that the leakage oil does not drip outside the compressor when the lubricating oil leaks.

Regarding the conventional leaked oil absorbing device of this type of compressor, the applicant of the present invention as shown in, for example, FIGS.
No. 62-023967) was submitted. 4th, 5th
In the figure, reference numeral 1 denotes an absorption unit housed in a recess 4 formed in a lower portion of a head cover 3 of a compressor 2, and the absorption unit 1 includes a shaft sealing device 7 interposed between a rotor shaft 6 and a head cover 3. It absorbs the lubricating oil in the compressor 2 that has leaked from the shaft 2, that is, the leaked oil from the shaft sealing device 7. The shaft sealing device 7 is composed of a mechanical seal 8 that seals the inside of the compressor 2 and an oil slinger 9 that rotates together with the rotor shaft 6. The absorption unit 1 is made of, for example, felt or sponge, and the absorption member 10 that absorbs the oil leaked from the shaft sealing device 7 introduced into the absorption unit 1 and the upper end of the absorption member 10 are opened. Become.

On the other hand, 12 is an electromagnetic clutch mounted on the rotor shaft 6 outside the head cover 3, and 13 is a coil case for supporting the exciting coil 14 of the electromagnetic clutch 12 together with the bobbin 15. A recess 16 that is recessed in the axial direction is formed in the central portion of the coil case 13 through which the rotor shaft 6 penetrates, and the boss 3a of the head cover 3 that protrudes toward the electromagnetic clutch 12 is fitted into the recess 16 and further the recess 16 A plate portion 17 is formed on the outer side of the radiation, and the plate portion 17 is in contact with the side surface 3b of the head cover 3 on the electromagnetic clutch 12 side. This coil case 13 is the fifth
As shown in the figure, it is fixed to the head cover 3 by a plurality of bolts 18. Between the recess 16 of the coil case 13 and the boss portion 3a of the head cover 3, a lower end opens at the top of the absorbing member 10 of the absorbing unit 1 and an upper end opens near the oil slinger 9 of the shaft sealing device 7. 19 is provided, and the guide groove 19 guides the leaked oil of the shaft sealing device 7 to the absorbing unit 1, and constitutes the leaking oil absorbing device 20 together with the absorbing unit 1.

In the absorption unit 1 described above, the side surface 11a of the case 11 on the electromagnetic clutch 12 side contacts the coil case 13 of the electromagnetic clutch 12,
The leak oil guided by the guide groove 19 is prevented from leaking to the outside. Further, in FIG. 5, the engaging members 23 and 24 formed on the left and right side walls 21 and 22 of the case 11 are engaged with the pair of protruding members 25 and 26 formed on the left and right with the recess 4 of the head cover 3 interposed therebetween. Then, the absorption unit 1 is detachably attached to the head cover 3, so that the amount of leaked oil can be easily confirmed. When the lubricating oil leaks from the mechanical seal 8 of the shaft sealing device 7, the leaked oil is dropped into the boss portion 3a by the centrifugal force of the oil slinger 9.
It is guided from the boss portion 3a to the guide groove 19 and absorbed by the absorbing member 10 of the absorbing unit 1. At this time, the absorbing member 10
Since it is stored in 11, the leaked oil will not drip outside the compressor 2 unless the oil absorbing capacity of the entire absorbing member 10 is utilized and exceeds the oil absorbing capacity of the absorbing member 10. Has become.

(Problems to be Solved by the Invention) However, even in such a leaked oil absorbing device for a compressor of the prior application, the coil case 13 of the electromagnetic clutch 12 and the head cover 3 are configured to be in metal contact with each other. The leakage oil of the shaft sealing device 7 is guided to the outer surfaces of the coil case 13 and the head cover 3 through the slight gap between the coil case 13 and the head cover 3 due to the capillary phenomenon.
Before the absorption member 10 of the absorption unit 1 is saturated, the compressor 2
Vibration and air flow due to rotation, and the like, drips outside the compressor 2. Therefore, there is a problem that the oil absorption efficiency of the absorption unit 1 is reduced.

(Purpose of the Invention) Therefore, according to the present invention, the leakage oil leaks to the outside of the compressor by interposing a seal member between the head cover of the compressor and the coil case of the electromagnetic clutch to block the gap between them. The purpose is to prevent dripping and to reliably guide the leaked oil to the guide groove to improve the oil absorption efficiency of the absorption unit.

(Means for Solving the Problems) In order to achieve the above object, a compressor leakage oil absorbing device according to the present invention absorbs leakage oil of a shaft sealing device interposed between a rotor shaft of a compressor and a head cover. Leaking oil absorbing device for a compressor, which is provided between the absorbing unit and a coil case of an electromagnetic clutch mounted on the rotor shaft and a head cover and guides the leaking oil of the shaft sealing device to the absorbing unit. In the above, a liquid gasket is provided between the head cover and the coil case to surround the shaft sealing device except for a portion where the absorbing member of the absorbing unit comes into contact with the head cover and the guide groove. The leakage of oil is guided and the leaked oil is guided to the guide groove.

(Operation) In the present invention, since the seal member is interposed between the head cover of the compressor and the coil case of the electromagnetic clutch to block the gap between them, the leaked oil leaks to the outside of the compressor and drips. This is prevented, and the leaked oil is reliably guided to the guide groove. Therefore, the oil absorption efficiency of the absorption unit is improved.

(Example) Hereinafter, the present invention will be described with reference to the drawings.

1 to 3 are views showing a first embodiment of the present invention.

First, the configuration will be described. Incidentally, in FIGS. 1 and 3, the same components as those of FIGS. 11 and 12 showing a conventional example are designated by the same reference numerals and the description thereof will be omitted.

In FIGS. 1 and 2, 31 is a liquid gasket as a seal member interposed between the head cover 3 of the compressor 2 and the coil case 13 of the electromagnetic clutch 12.
31 is filled in the gap formed between the recessed portion 3c of the boss portion 3a of the head cover 3 and the recessed portion 16 of the coil case 13 and the connecting portion 13a of the plate portion 17. Further, as shown in FIG. 3, the absorbing member 10 of the absorbing unit 1 is attached to the head cover 3
It is provided along the outer periphery of the boss portion 3a so as to surround the mechanical seal 8 of the shaft sealing device 7 except for the portion contacting with and the guide groove 19. 1 and 2, when the compressor 2 is assembled, the liquid gasket 31 is applied to the recess 3c of the head cover 3 in the above-described range before the coil case 13 is attached to the head cover 3. Mounted on the recessed portion 16 of the coil case 13 except for the portion where the absorbing member 10 contacts the head cover 3 and the guide groove 19.
The gap 32 between the boss portion 3a of the head cover 3 and the gap 33 between the plate portion 17 and the side surface 3b of the head cover 3 are blocked.

Next, the operation will be described.

In FIG. 1, when the compressor 2 is operated and the lubricating oil inside the compressor 2 leaks from the mechanical seal 8 of the shaft sealing device 7, most of the leaked oil is generated by the centrifugal force of the oil slinger 9 on the inner surface of the boss portion 3a. The guide groove 19 from the boss 3a.
Is guided to the absorbing member 10 of the absorbing unit 1 through the guiding groove 19 and is absorbed. However, a part of the leaked oil is atomized and scattered to adhere to the outer surface of the boss portion 3a and enter the gap 32 by the capillary phenomenon, but the communication between the gaps 32 and 33 is blocked by the liquid gasket 31. Further, since the portion where the gap 32 is not sealed by the liquid gasket 31 communicates with the guide groove 19 and the absorbing member 10, the leaked oil is prevented from leaking to the outside of the compressor 2 and the leaked oil is surely guided. It is guided by the groove 19 and absorbed by the absorbing member 10.

Thus, in this embodiment, since the liquid gasket 31 is interposed between the head cover 3 of the compressor 2 and the coil case 13 of the electromagnetic clutch 12 to interrupt the communication between the gaps 32 and 33, the absorption unit 1 It is possible to prevent the leaked oil of the shaft sealing device 7 from leaking out of the compressor 2 and drip before the absorbing member 10 of FIG. it can. Therefore, the oil absorption efficiency of the absorption unit 1 can be improved.

(Effect) According to the present invention, a seal member is interposed between the head cover of the compressor and the coil case of the electromagnetic clutch to block these gaps, so that the leaked oil leaks to the outside of the compressor. It is possible to prevent the oil from dripping and to reliably guide the leaked oil to the guide groove. As a result, the oil absorption efficiency of the absorption unit can be improved.

[Brief description of drawings]

1 to 3 are views showing a first embodiment of a leakage oil absorbing device for a compressor according to the present invention, FIG. 1 is a front sectional view thereof, and FIG. 2 is an enlarged sectional view of a portion A of FIG. , Fig. 3 is III- of Fig. 1.
Sectional views taken along the line III, FIGS. 4 and 5 are views showing a conventional leaked oil absorbing device for a compressor, FIG. 4 is a front sectional view thereof, and FIG. 5 is a view taken along the line XII-XII of FIG. FIG. 1 ... Absorption unit, 2 ... Compressor, 3 ... Head cover, 6 ... Rotor shaft, 7 ... Shaft sealing device, 12 ... Electromagnetic clutch, 13 ... Coil case, 19 ... Induction groove, 20 ... … Leaked oil absorber, 31 …… Liquid gasket.

Claims (1)

[Scope of utility model registration request] 1. An absorption unit, which is interposed between a rotor shaft of a compressor and a head cover, for absorbing leaked oil of a shaft sealing device, and is provided between a coil case and a head cover of an electromagnetic clutch mounted on the rotor shaft. And a guide groove for guiding the leaked oil of the shaft sealing device to the absorbing unit, the leaking oil absorbing device of the compressor comprising: a portion where the absorbing member of the absorbing unit contacts the head cover; A compression characterized in that a liquid gasket is provided between the head cover and the coil case surrounding the shaft sealing device to prevent leakage of the leaked oil to the outside of the compressor and to guide the leaked oil to the guide groove. Oil leakage device of the machine.