JPH0669376U - Leakage oil discharge structure of compressor - Google Patents

Abstract

(57) [Abstract] [Purpose] Leakage oil is prevented from entering the rotor bearing and causing grease to flow out, and its performance is prevented from deteriorating to extend the service life of the electromagnetic clutch mechanism. [Structure] Oil leaking through a mechanical seal 51 interposed between a front boss 15 fixed to a housing 13 having a compression mechanism and a shaft 19 is discharged to the outside through an oil discharge hole 55 formed in the boss. . The shaft is rotatably supported by the boss via a shaft bearing 17 and is connected to the compression mechanism. The oil drain hole is located between the shaft bearing and the mechanical seal. In this way, oil is prevented from reaching the rotor bearing 39 that rotatably supports the clutch rotor 35 on the boss. It is preferable that the oil discharged to the outside of the boss is further discharged to the outside by the centrifugal force generated by the rotation of the rotor.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a leaked oil discharge structure of a compressor used in a car air conditioner, an air conditioner, a refrigerator, etc.

[0002]

[Prior art]

 For example, in a compressor used for a car air conditioner, a compression mechanism is provided in a housing, and a refrigerant gas is compressed by driving this compression mechanism. To drive the compression mechanism, a shaft is rotatably supported by a front boss fixed to the housing via a shaft bearing. A mechanical seal is interposed between the front boss and the shaft, and the mechanical seal seals the refrigerant gas in the housing.

A clutch rotor is rotatably supported by the front boss via a rotor bearing. The clutch rotor is rotationally driven by transmitting the rotational force of an automobile engine via, for example, a belt. The rotational force of the clutch rotor is transmitted to the shaft via the electromagnetic clutch. The compressor mechanism is driven according to the rotation of the shaft.

[0004]

[Problems to be solved by the device]

 In the conventional compressor, when oil leaks from the housing through the mechanical seal, the leaked oil travels from the front boss through the inner wall of the clutch rotor and reaches the rotor bearing. Since the rotor bearing is a shield type, the oil that has infiltrated causes grease inside the bearing to flow out, which significantly deteriorates its performance and shortens the clutch life.

Therefore, an object of the present invention is to prevent leaked oil from entering the rotor bearing that supports the clutch rotor, and use the rotational force of the clutch rotor to forcibly discharge the oil by centrifugal force. It is to provide a leaked oil discharge structure of the compressor that can.

[0006]

[Means for Solving the Problems]

 According to the present invention, a housing having a built-in compression mechanism, a boss fixed to the housing, a shaft rotatably supported by the boss via a shaft bearing and connected to the compression mechanism, Leakage oil for a compressor comprising a clutch rotor rotatably supported by a boss through a rotor bearing, and a mechanical seal interposed between the boss and the shaft inside the shaft bearing. In the discharge structure, an oil discharge hole for a compressor is obtained, in which an oil discharge hole is formed in the boss between the shaft bearing and the mechanical seal.

Further, it is preferable that an inclined surface that is inclined outward is formed in a portion of the clutch rotor that faces the oil discharge hole in a radial direction.

[0008]

【Example】

 An embodiment of a leaked oil discharge structure of a compressor according to the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 11 indicates a compressor body, and a housing 13 of the compressor body 11 is provided with a compression mechanism (not shown). The refrigerant gas is compressed by driving this compression mechanism.

The flange portion 16 of the front boss 15 is fixed to the housing 13. A shaft 19 is rotatably supported on the front boss 15 via a shaft bearing 17. The shaft 19 is connected to the compression mechanism.

A plate support portion 21 is spline-connected to the tip portion of the shaft 19 and attached and fixed by a nut 23. A reinforcing plate 25 and a plate spring 27 are fixed to the plate supporting portion 21 by pins 29. A clutch plate 31 is attached to the plate spring 27 by a pin 33.

A clutch portion 36 of the clutch rotor 35 is arranged adjacent to the clutch plate 31. The clutch rotor 35 is rotatably supported by the bearing support portion 37 via the rotor bearing 39 on the bearing support portion 41 of the front boss 15. The clutch rotor 35 accommodates an electromagnet 43, which is fixed to the front boss 15 via a retainer 45. The clutch plate 31 also serves as an armature, and when the electromagnet 43 is excited, the clutch plate 31 is connected to the clutch portion 36 of the clutch rotor 35 in the rotational direction. The clutch plate 31, the clutch portion 36, and the electromagnet 43 form an electromagnetic clutch 47.

The clutch rotor 35 has a pulley 49 on the outer circumference, and the rotational driving force transmitted to the pulley 49 via a V-belt or the like is transmitted from the clutch portion 36 to the clutch plate 31. The shaft 19 is rotated.

A mechanical seal 51 is interposed between the shaft 19 and the front boss 15, and the mechanical seal 51 seals the refrigerant gas in the compression chamber. Reference numeral 53 indicates an O-ring provided on the mechanical seal 51.

An oil discharge hole 55 extending in the radial direction is formed in a portion of the front boss 15 outside the mechanical seal 51 and adjacent to the bearing support portion 41. The oil discharge hole 55 extends in the vertical direction.

On the other hand, in the bearing support portion 37 of the clutch rotor 35, an inclined surface 57 that is inclined outward is formed at a portion that faces the oil discharge hole 55 in the radial direction. That is, the inclined surface 57 is formed so as to expand outward in the radial direction as the distance from the rotor bearing 39 increases. A gap 59 for discharging oil is formed between the bearing support portion 37 and the retainer 45.

In the leaked oil discharge structure of the compressor configured as described above, the oil leaked from the compression chamber through the mechanical seal 51 flows along the shaft 19 and then flows toward the inner peripheral surface of the front boss 15. , As shown by the arrow, flows into the oil discharge hole 55. The oil that has passed through the oil discharge hole 55 drops on the inclined surface 57 of the clutch rotor 35. The oil dropped on the inclined surface 57 flows outward along the inclined surface 57 due to the centrifugal force generated by the rotational force of the clutch rotor 35, separates from the rotor bearing 39, and passes through the gap 59 to the outside of the clutch rotor 35. Is discharged.

Therefore, the leaked oil is prevented from entering the rotor bearing 39, the performance of the rotor bearing 39 is prevented from being deteriorated, the life of the electromagnetic clutch mechanism is prevented from being shortened, and the service life is extended. be able to.

Even when the rotation of the clutch rotor 35 is stopped, the oil dropped on the inclined surface 57 flows downward along the inclined surface 57, separates from the rotor bearing 39, and passes through the gap 59. It is discharged to the outside of the clutch rotor 35.

[0020]

[Effect of device]

 As described above, according to the present invention, the oil leaked from the inside of the housing through the mechanical seal is discharged to the outside through the oil discharge hole of the boss. Furthermore, it is possible to forcibly discharge the leaked oil discharged from the boss to the outside by the centrifugal force generated by the rotational force of the clutch rotor. Therefore, it is possible to prevent the oil from entering the rotor bearing and letting out the grease, prevent the performance of the rotor bearing from deteriorating, and prolong the service life of the electromagnetic clutch mechanism.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing an embodiment of a leaked oil discharge structure of a compressor according to the present invention.

[Explanation of reference signs] 11 Compressor body 13 Housing 15 Front boss 17 Shaft bearing 19 Shaft 31 Clutch plate 35 Clutch rotor 36 Clutch portion 37 Bearing support portion 39 Rotor bearing 41 Bearing support portion 43 Electromagnet 47 Electromagnetic clutch 49 Pulley 51 Mechanical seal 53 O Ring 55 Oil discharge hole 57 Sloping surface 59 Gap

Claims (2)

[Scope of utility model registration request] 1. A housing containing a compression mechanism, a boss fixed to the housing, a shaft rotatably supported by the boss via a shaft bearing and connected to the compression mechanism, and a rotor on the boss. In a leaked oil discharge structure for a compressor, which comprises a clutch rotor rotatably supported via a bearing, and a mechanical seal interposed between the boss and the shaft inside the shaft bearing, A leaked oil discharge structure for a compressor, wherein an oil discharge hole is formed in the boss between the shaft bearing and the mechanical seal. 2. The leaked oil discharge structure for a compressor according to claim 1, wherein the clutch rotor has an inclined surface inclined outwardly at a portion facing the oil discharge hole in a radial direction. .