JPH02173388A - Horizontal type rotary compressor - Google Patents

Abstract

PURPOSE:To improve flexibility and to reduce wear of the inner surface of an oil pipe by a method wherein a pitch winding coil spring secured to the one end of a shaft is contained in an oil feed pump and the one end thereof is secured to a delivery cover, and the other end is mounted to a bent oil pipe opened in oil in a closed container. CONSTITUTION:A pitch winding coil spring 18a secured on a shaft 9 is arranged in an oil pipe 17 having its tip being opened and bent, and the oil pipe and the coil spring are both immersed in oil 4. The inner side in a radial direction of coil spring 18a at the bent part of the oil pipe 17 is deformed in a compression direction and the outer side thereof is deformed in a stretch direction. Since a deformation amount in a stretch direction is high and that in a compression direction is low, and a repulsion force is weak and flexibility is excellent. Thus, friction at the bent part of the oil pipe 17 is reduced, and the generation of wear is decreased. Further, since a coil is separated by a distance equivalent to one full pitch, a lift per one full rotation can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a horizontal rotary compressor used in refrigeration equipment such as refrigerator-freezers.

BACKGROUND OF THE INVENTION A conventional horizontal rotary compressor will be described below with reference to the drawings. Fig. 3 shows a horizontal rotary compressor shown in Japanese Patent Publication No. 6147994, in which 1 is a substantially cylindrical closed container long in the transverse direction, a stator 2 and a rotor 3.
A motor M consisting of a motor M and a compression device C driven by this motor M are housed.

Reference numeral 4 represents oil, which is collected below the closed container 1. 5
3, -7 is a cylinder, 6 is a main side housing, and 7 is a sub side housing, which are closely attached to both sides of the cylinder 5 to form a compression chamber 8. Reference numeral 9 denotes a shaft connected to the rotor 3, which has an oil groove 10 on its outer periphery and an eccentric portion 11.
has. A roller 12 is fitted into the eccentric portion 11 and is inscribed in the compression chamber 8 . A vane 13 is pressed against the roller 12 by a spring 14 to partition the compression chamber 8 into a high pressure side and a low pressure side. 15 is a discharge valve provided in the sub-side housing 7. Reference numeral 16 denotes a discharge cover fixed to the sub-side housing 15 so as to cover the discharge valve. 18 is a tightly wound coil spring and is fixed to one end of the shaft 9. Reference numeral 17 is a curved oil pipe fixed to the center of the discharge cover 16, one end of which enters the MiJ oil/I/4 and accommodates the coil spring 18.

In the above configuration, when the motor M is energized, the rotation of the rotor 3 is transmitted to the shaft 9, and the refrigerant gas compressed in the compression chamber 8 by the rotation of the roller 12 is transferred to the sub-side housing. The liquid is discharged from the V tube 15 into the closed container 1 and sent to a freezing cycle. On the other hand, the rotation of the shaft 9 simultaneously rotates the tightly wound coil spring 18 within the oil pipe 17, and the lead of the tightly wound coil spring 18 sequentially increases oil/1/4.
The oil groove 10 of the shaft 9 allows the secondary side housing 7, the main side housing 6, and the mJ roller 1 to
2. Lubricate each.

Problems to be Solved by the Invention However, in the above configuration, since the coil spring 18 is tightly wound, the repulsive force is strong, and the oil pipe 17
Friction with the inner surface of the material increases, resulting in an increase in load, and
The inner surface of the oil pipe 17 is highly abraded. Also, shaft 9
The lift amount of oil per revolution is equivalent to one turn of closely wound winding, which has the disadvantage that the amount of oil supplied is small.

In view of the above problems, the present invention provides a horizontal rotary compressor with high operating efficiency and high reliability.

Means for Solving the Problems In order to solve the above problems, the horizontal rotary compressor of the present invention stores oil in a closed container and has a discharge cover fixed to an auxiliary side housing that pivotally supports the shaft of the compression element. and a refueling pump provided on the side opposite to the motor of the shaft, and the refueling pump stores a pitch-wound coil spring fixed to one end of the shaft, and the one end is connected to the center of the discharge cover. It is fixed to one end face, and the other end is provided with a curved oil pipe that opens into the oil.

According to the present invention, with the above-mentioned configuration, the coil spring is wound in a pinch manner, which has better flexibility than a tightly wound one, so that the repulsion force is weak, the friction with the inner surface of the oil pipe is small, and the shaft 1
Embodiments in which the lift of oil in the rotating shaft is increased Below, embodiments of the present invention will be described with reference to the drawings. Note that parts that are the same as those in the conventional system will be described using the same reference numerals, and parts that have the same structure and operation will be omitted.

Figure 1 shows a horizontal rotary compressor according to an embodiment of the present invention.

It shows. FIG. 2 shows an enlarged view of the oil supply pump section in FIG. 1. In FIG. 1, reference numeral 18a denotes a pitch-wound coil spring fixed to the shaft 9, which is disposed inside a curved oil pipe 1 with an open end, and both penetrate into V4.

In the above configuration, the pinch-wound coil spring 18a is a compression coil spring, and the conventional tightly wound coil spring 18 is a tension coil spring. At the curved portion of the oil pipe 17, the pinch-wound coil spring 18a deforms in the compression direction on the inside in the radial direction and in the tensile force direction on the outside, but the amount of deformation is larger in the tensile force direction and less deformed in the compression direction, so it rebounds. It has low strength and good flexibility. In comparison, the radially outer side of the conventional tightly wound coil spring 18 at the curved portion of the oil pipe 17 is deformed in the tensile direction to the extent that the adjacent coinons are separated by a coil diameter, producing a strong repulsive force. There is. or,
As shown in Figure 2, since the coils are separated by a pinch, the head per revolution can be increased.

Therefore, due to the good flexibility of the pitch-wound coil spring 18a, the friction at the curved portion of the oil pipe 17 is reduced, the wear on the inner surface of the oil pipe 17 is reduced, the lift per revolution is increased, and the amount of oil supplied is also reduced. The greater the number, the higher the reliability.

Effects of the Invention As described in 2., the present invention accommodates a pitch-wound coil spring fixed to one end of a shaft in a fuel pump, and fixes one end to the center of the end face of a discharge cover, and the other end to a closed container. By providing a curved oil pipe that opens into the oil, the pinch-wound coil spring, which has good flexibility and weak repulsive force, reduces friction with the inner surface of the oil pipe, thereby reducing wear on the inner surface of the oil pipe. However, a more reliable horizontal rotary compressor can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a horizontal rotary compressor showing an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the oil supply pump section of Fig. 1, and Fig. 3 is a sectional view of a conventional horizontal rotary compressor. It is a diagram. 1... Airtight container, 2... Stator, 3
...Rota, 4...Oil, 5...
Cylinder, 6...Main side housing, completed...
...Hata 1] Side housing, 8...°...aE
iL 9゛°...shaft, 12...roller, 13...vane, 15...discharge valve, 16...discharge cover, 17...・・・・・・
Oil%', 18 a. River...Coil spring. Name of agent: Patent attorney Shigetaka Awano and one other person

Claims (1)

[Claims] Oil is stored in an airtight container, and the compression element includes a shaft having an eccentric portion and a cylinder forming a compression chamber concentrically with the rotation center of the shaft. a roller fitted to the eccentric portion and rolling within the compression chamber; a vane that partitions the compression chamber into a high pressure side and a low pressure side by being pressed against the roller; and sealing both sides of the cylinder. At the same time, a main side housing on the electric element side that pivotally supports the shaft, a sub side housing on the side opposite to the electric element, a discharge valve provided on the side opposite to the cylinder surface of the sub side housing, and a main side housing that covers the discharge valve. houses a compression element having a discharge cover fixed to the sub-side housing, and an oil supply pump provided on the opposite side of the shaft, and the oil supply pump includes a pitch-wound coil spring fixed to one end of the shaft. A horizontal rotary compressor, comprising a curved oil pipe that houses the coil spring, has one end fixed to the center of the end face of the discharge cover, and has the other end opened into the oil.