JPH0519586U - Open type scroll compressor - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a compact and highly reliable open type scroll compressor with reduced mechanical loss. [Structure] A compressor main body 5 that supports the compression section 30 and that supports one end of a main shaft 8 that drives the compression section 30 and that stores lubricating oil at the bottom, and the other end of the main shaft 8 that supports an oil pump. With a bearing support 10 containing 18 and a spindle 8
In the open type scroll compressor in which the oil pump 18 is driven through the gears 23 and 24 fixed to the main shaft 8 and the oil pump 18 and meshed with each other by the rotation of the Is shifted from the direction perpendicular to the center of the main shaft side gear 23, and the oil pump side gear 24 is arranged above the oil level of the stored lubricating oil.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an open scroll compressor used for compressing a refrigerant such as refrigeration and an air conditioner.

[0002]

[Prior Art]

 FIG. 2 is a cross-sectional view showing the structure of a conventional open type scroll compressor of this type, which has already been filed in Japanese Patent Application No. 2-4082 by the same applicant. In the figure, 1 is a fixed scroll having an intake port 1a and a discharge port 1b, 2 is an orbiting scroll paired with the fixed scroll 1, and the fixed scroll 1 and the orbiting scroll 2 constitute a compression section 30. .. Reference numeral 3 is a thrust bearing for supporting the orbiting scroll 2, 4 is an old joint, 5 is a compressor main body in which the fixed scroll 1 is supported and a chamber 5a is formed therein, and 6 is a lubrication at the bottom of the chamber 5a. An oil reservoir 7 for storing oil is an oil hole 7 passing through a wall surface of the compressor body 5 on the side supporting the compression portion 30.

Reference numeral 8 denotes a main shaft whose one end is connected to the orbiting scroll 2, 9 denotes a main bearing which supports one end of the main shaft 8, 10 denotes a bearing support attached to the other end of the compressor body 5, and 11 Is a secondary bearing which is provided in a portion where the main shaft 8 penetrates the bearing support 10 and supports the other end side of the main shaft 8, and 12 is a shaft seal which is accommodated in a recess 13 formed in the bearing support 10 along the main shaft 8. In the device, the recess 13 is covered by the cover 14. Thrust receivers 15 and 16 are provided to restrict the movement of the main shaft 6 in the thrust direction, and are attached to the compressor body 5 and the bearing support 10 by spring pins or the like. 17 is a balancer fitted in the main shaft 8 and arranged in the chamber 5a, 18 is an oil pump built in the bearing support 10, 19 is penetrating through the bearing support 10 and the main shaft 8, and each sliding part An oil hole 20 communicating with the discharge side of the oil pump 18 penetrates the bearing support 10 and the compressor body 5, and connects the suction side of the oil pump 18 with the suction pipe 21 arranged in the oil sump 6. An oil hole, 22 is an oil strainer connected to the tip of the suction pipe 21, and 23 and 24 are gears that are fixedly engaged with the main shaft 8 and the shaft of the oil pump 18, respectively, and their centers are arranged vertically. A part of the gear 24 is immersed in the lubricating oil in the oil sump 6. Reference numeral 25 is a V-belt wheel fitted to the tip of the other end of the main shaft 8.

In the conventional open-type scroll compressor configured as described above, when the rotation of the main shaft 8 is transmitted to the oil pump 18 via the gears 23 and 24, the volume of the oil pump 18 changes. The lubricating oil in the oil reservoir 6 is supplied to each sliding portion through the strainer 22, the suction pipe 21, and the oil holes 20 and 19 to perform lubrication. The lubricating oil that has entered the suction port 1a returns to the oil reservoir 6 through the oil hole 7.

[0005]

[Problems to be solved by the device]

 Since the conventional open-type scroll compressor is configured as described above, the gear 24 on the shaft side of the oil pump 18 interferes with the oil surface of the lubricating oil, resulting in a large mechanical loss. Are arranged in the vertical direction, there is a problem in that the size of the compressor body 5 in the height direction becomes large and the compressor body 5 becomes large. The present invention has been made to solve the above problems, and an object thereof is to provide a compact and highly reliable open type scroll compressor with reduced mechanical loss.

[0006]

[Means for Solving the Problems]

 In the open type scroll compressor according to the present invention, the center of the gear on the oil pump side is displaced from the direction perpendicular to the center of the gear on the main shaft side, and the gear on the oil pump side is arranged above the oil level of the stored lubricating oil. It was done.

[0007]

[Action]

 The gear on the oil pump side of the open type scroll compressor in this invention is disposed above the oil surface of the lubricating oil so that it does not interfere with the oil surface and is located at a position displaced from the vertical direction with respect to the main shaft side gear. The height of the gears in the vertical direction is reduced by arranging the gears.

[0008]

【Example】

 Example 1. An embodiment of this invention will be described below with reference to the drawings. 1 is a sectional view showing the structure of an open type scroll compressor according to Embodiment 1 of the present invention. In the figure, the same reference numerals as those in FIG. 2 are the same as those of the conventional one, but the gear 24 on the oil pump 18 side is displaced from the vertical direction with respect to the gear 23 on the main shaft 8 side, and the lubricating oil It is located above the oil level of. Therefore, the oil pump 18 is also arranged at a position corresponding to it. 26 is an oil supply pipe that connects the strainer 22 in the oil sump 6 with the oil hole 20 that communicates with the suction side of the oil pump 18, and 27 is a screw formed on the wall surface of the compressor body 15 that supports the compression section 30. A check valve screwed to the portion is formed so as to allow the flow of the lubricating oil from the suction port 1a side to the oil reservoir 6 side and prevent the flow in the opposite direction. 28 is a support plate, one end of which is tightened and fixed to the wall surface together with the check valve 27, and the other end of which is integrated by brazing or the like to support the strainer 22.

In the scroll compressor according to the first embodiment of the present invention configured as described above, the rotation of the main shaft 8 is transmitted to the oil pump 18 via the gears 23 and 24, similarly to the conventional one. Then, the volume of the oil pump 18 changes, and the lubricating oil in the oil sump 6 is supplied to each sliding portion through the strainer 22, the oil supply pipe 26, and the oil holes 20 and 19 to perform lubrication. Further, the lubricating oil that has entered the suction port 1a side returns to the oil reservoir 6 through the check valve 27.

As described above, according to the above-described embodiment, the center of the gear 24 on the oil pump 18 side is displaced from the vertical direction with respect to the center of the gear 23 on the main shaft 8 side, and the oil level of the lubricating oil in the oil sump 6 is increased. Since it is arranged higher, the interference with the oil surface of the gear 24 is eliminated, the mechanical loss is reduced, the size of the compressor body 5 in the height direction can be reduced, and the intake port 1a Since the lubricating oil is returned to the oil sump 6 side through the check valve 27, the oil circulation amount is not increased, and even if the refrigerant is started up while the refrigerant is sunk and the refrigerant foams, the reverse The stop valve 27 does not prevent ejection to the compression unit 10 and the amount of oil taken out does not increase, and since the strainer 22 is supported by the support plate 28, vibration of the oil supply pipe 26 can be suppressed. Also, it is possible to prevent the damage to the oil supply pipe 26 due to vibration, and it is possible to exhibit a practically excellent effect.

[0011]

[Effect of the device]

 As described above, according to the present invention, one end of the main shaft for supporting the compression part and driving the compression part is supported, and the compressor main body in which the lubricating oil is stored at the bottom part and the other end of the main shaft are supported. In an open type scroll compressor, which is equipped with a bearing support that incorporates an oil pump, drives the oil pump through gears that are fixed to the main shaft and the oil pump by rotation of the main shaft and meshed with each other. Since the center of the gear on the oil pump side is offset from the direction perpendicular to the center of the gear on the main shaft side and the gear on the oil pump side is arranged above the oil surface of the stored lubricating oil, it reduces mechanical loss and is small and reliable. It is possible to provide an open scroll compressor having high performance.

[Brief description of drawings]

FIG. 1 is a sectional view showing a configuration of an open type scroll compressor according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a configuration of a conventional open type scroll compressor.

[Explanation of symbols]

 1 Fixed scroll 1a Suction port 2 Oscillating scroll 5 Compressor body 6 Oil sump 8 Main shaft 10 Bearing support 18 Oil pump 19, 20 Oil hole 22 Strainer 23, 24 Gear 26 Oil supply pipe 27 Check valve 28 Support plate 30 Compressor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Jun Nagata 6-5-6 Tehira, Wakayama City Mitsubishi Electric Engineering Co., Ltd. Itami Works Wakayama Branch

Claims (1)

[Scope of utility model registration request] 1. A compressor body supporting one end of a main shaft for supporting the compression part and driving the compression part and having lubricating oil stored in the bottom part, and another end of the main shaft for supporting an oil pump. An open type scroll compressor having a built-in bearing support, wherein the main shaft and the oil pump are fixed by the rotation of the main shaft to drive the oil pump via gears meshed with each other. An open type scroll characterized in that the center of the gear on the oil pump side is displaced from the direction perpendicular to the center of the gear on the main shaft side and the gear on the oil pump side is arranged above the oil level of the stored lubricating oil. Compressor.