JPH0421027Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a lubricating device for a compressor, and in particular, to a structure for an oil pickup that smoothly supplies lubricating oil to a compressor connection part. .

[Conventional technology]

Conventionally, the oil pickup structure is
It is known as a device that is connected at an angle to the rotating shaft of a compressor and supplies lubricating oil to the support portion of the rotating shaft using centrifugal force during rotation.

That is, conventionally, when lubricating oil is supplied, it has not been possible to avoid deterioration in the performance of the oil pickup structure due to the refrigerant gas originally contained in the lubricating oil.

In this respect, the oil pickup structure shown in FIG. 1 is constructed by forming a small hole 24 in the upper part of the tube 17, through which the refrigerant gas that has flowed together with the lubricating oil is released. Because of this, noise is generated from the support part of the rotating shaft.Also, the tube shape has a lower benzene structure with a larger rotation direction, and when it rotates, a lot of bubbles are generated due to the forming phenomenon of the lubricating oil. Pumping power becomes weaker, pumping time becomes longer, and
When the wing body part 31 attached to the tube is located at the lower part of the tube and rotates, lubricating oil is scattered on the wing body part, and this scattering phenomenon generates noise.

Fig. 2 shows a structure similar to Fig. 1, in which the refrigerant gas contained in the lubricating oil is discharged through a chip hole 62 on its way up through the tube 18, and the noise at the support part of the rotating shaft is reduced. However, since the lubricating oil passage 61 has a 90° shape, the oil passage resistance is large, so the lubricating oil pumping time becomes longer.

In order to solve this problem, the device shown in Fig. 3 has been proposed, which is disclosed in U.S. Patent No.
3858685.

In other words, in this device in which the vertical shaft 4 in the form of a vertical shaft of a refrigerator is used as a compressor, the upper part has a circular cross section 3a, b, and the lower part has a circular cross section at the lowest end and the upper end of the lower part in a straight line. It consists of connected tubes 16 (FIG. 4) in the form of a spiral. Furthermore, this tube 15 is provided with a longitudinal gap 15 and has a wing body fixed to the intermediate portion of the tube. The tube was located inclined at the end of the crankshaft of the compressor, and while rotating pumped out oil from the oil tank and sent it to parts requiring lubrication, and at the same time separated refrigerant gas from the lubricating oil. This separated gas is
A large amount is inhaled into the tube through the wide gap 15 at the bottom of the tube 16, which was previously described. This large amount of gas is inhaled in the narrow gap 1 at the top.
5, it is not discharged in advance and is sucked up and raised, causing abnormal noise between the crankshaft and the bearing. However, there is also the advantage that a large amount of lubricating oil can be sucked through this wide gap.

[The problem that the idea attempts to solve]

Contrary to the usual shape, if the lower part of the tube is made narrower and the upper part is made wider, there is an advantage that the inhaled gas can be smoothly exhausted through the gap in the upper part. The disadvantage is that a small amount of lubricating oil is sucked in through the narrow gap, and the pumping force is weak due to the wide gap in the upper part.

Furthermore, by inserting and rotating the wing body portion 32 in the lubricating oil, a lubricating oil forming phenomenon occurs, and an attempt was made to attenuate the lubricating oil noise rising along the tube due to this phenomenon. This was because the blades inserted into the oil surface caused the lubricating oil to scatter, which resulted in the generation of noise due to the lubricating oil falling.

[Purpose of invention]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an oil pickup structure for a lubricating device that solves the above problems.

Still another object of the present invention is to provide an oil pickup structure for a lubricating device in which a predetermined portion of the tube is immersed in the oil level, a gap is formed over the entire length of the tube, and refrigerant gas is uniformly discharged through this gap. Our goal is to provide the following.

Still another object of the present invention is to provide an oil pick-up small tube with a wing section located above the oil level, the wing section remaining in its predetermined position at a constant distance from the gap and covering the gap; An object of the present invention is to provide an oil pickup structure that blocks lubricating oil rising to the outside.

[Means to solve the problem]

The present invention relates to a lubrication system for a vertical shaft compressor, which consists of a tube-shaped lubricating oil supply device located slightly inclined at the end of the crankshaft of the compressor. It has a cross section of a certain size, and is installed in the middle of the tube with a gap of a certain size that separates and discharges the refrigerant gas mixed with the lubricating oil inside the tube when the lubricating oil is taken in. , blades formed at the top of the above-mentioned gap to block the upward movement of the lubricating oil, which swirls upward along the outer surface of the tube during operation, at an intermediate position of the entire length of the tube, allowing the lubricating oil to remain on the surface of the tube, thereby reducing noise. An object of the present invention is to provide a lubricating oil pick-up tube having body means.

Therefore, in the device of the present invention, by making the gap between the lower and upper parts uniform, the refrigerant gas flowing through the tube can be discharged over the entire length of the tube, and the refrigerant gas that is being discharged due to centrifugal force is directed toward the crankshaft. This is to prevent mechanical noise from being reached.

Furthermore, the gap at the bottom end of the tube was reduced to prevent bubbles from being sucked in, improving pumping power.

Moreover, in the airfoil means in the middle section of the tube,
By removing the part that is inserted into the oil surface, the lubricant does not scatter during rotation, eliminating the noise of lubricant falling, and also prevents bubbles from being generated during rotation. We were able to improve the pumping power.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 5, axis 4 indicates the vertical axis of the compressor used in the condenser.

A crankshaft 5 and a knob 7 are connected to this shaft 4. An oil passage 6 for lubrication is installed in the inner axial direction of the knob 7, the crankshaft 5, and the shaft 4 as shown by the dotted line in Fig. 5, and the oil passage 6 connects the coupling (not shown) of the shaft 4. For lubrication, the outer surface of the shaft 4 is connected to a knob 7 carrying lubricating oil in an oil tank. One end of the tube 1 is located at the lower end of the knob 7, inclined at the end of the oil passage 6, and the other end is immersed in the oil level (FIGS. 6 and 7).

Due to the rotational movement of the shaft 4, the tube 1 rotates according to the vertical axis of rotation 8 of the shaft 4, with the tilted axis of the tube rotating. The lubricating oil particles within the tube 1 rise within the tube 1 due to centrifugal force. tube 1
has the same circular cross section throughout its entire length.

Further, the tube is provided with gaps 21, 22, 23 of two different sizes in the length direction. The upper gap 21 and the lower gap 22 form the same size, and the intermediate gap 23 forms a larger gap.

This is because the blade section 3, which will be explained later, covers the intermediate section knob gap 23 from above and blocks the exhaust flow of the refrigerant gas.

Therefore, the upper gap 21 and the lower gap 22
The amount of refrigerant gas discharged through and the gap in the middle part 2
The gap 23 in the middle part is formed wide so that the amount of refrigerant gas discharged through the gap 3 is the same.

In this example, when the size of the gap between the tubes was 0.5 to 1.5 m/m, the most efficient gas discharge was achieved.

That is, the size of the lower gap 22 is made to be the same as the size of the upper gap 21 to prevent bubbles generated from being sucked through the lower gap when the tube is rotated.

In other words, the gaps 21, 22, 2 in the upper, lower, and middle parts
3 to uniformly discharge the refrigerant gas, block the suction of bubbles from the lower gap 22, and improve the lubricating oil pump speed.

Furthermore, the tube 1 has an airfoil section 3 that divides the width of the airfoil section 3 into two halves with a line 14 in the diameter direction of the tube as a boundary at a tube intermediate section 13, that is, at a position 1/2 of the total length in the length direction of the tube. Be prepared.

During rotation of the tube 1, the wing body 3 is positioned above the oil level in order to minimize the generation of bubbles due to the wing body 3.

In other words, the aim is to minimize foam and increase lubricant pump speed.

The wing body part 3 covers the gap 23 between the tubes from above by a certain distance, and blocks the upward movement of lubricating oil that rises along the outer wall of the tube during rotational movement. This prevents noise from being generated when the lubricating oil lifted up to the knob 7 falls.

[Brief explanation of the drawing]

1 to 4 show examples of conventional oil pickup structures, where a in FIG. 1 is a side sectional view thereof, b in FIG. 1 is a view taken in the direction of arrow B of a in FIG. 1, 2 and 3 are side sectional views showing other examples of oil pickup structures, and a in FIG.
A sectional view taken along line B-B' in the figure, b in Fig. 3 is C in Fig. 3.
-C' line sectional view, FIG. 4 is a detailed view of section A in FIG. 3. 5 to 9 show embodiments of the present invention, FIG. 5 is an overall schematic diagram of the present invention, FIG. 6 is a front view of the device of the present invention shown in FIG. 5 during operation, 7 is a front view of the apparatus of the present invention shown in FIG. 5 when stopped, FIG. 8 is a detailed front view of the tube shown in FIG. 6, and FIG. 9 is a downward input view of the tube shown in FIG. 8. 1...Tube, 3...Wing body, 4...Shaft, 5
...Crankshaft, 6...Oil passage, 7...Knob, 8
...Vertical rotation axis.

Claims (1)

[Claims for Utility Model Registration] 1. In a lubrication system for a vertical shaft compressor, which consists of a tube-shaped lubricating oil supply device located slightly inclined at the end of the crankshaft of the compressor, the lubricating oil supply device is identical throughout the front cross section of the tube. a cross section,
An oil pickup structure comprising a gap of a constant size formed in the length direction of a tube, and a protruding means located at an intermediate portion of the tube and formed above the gap. 2. The oil pickup structure according to claim 1, wherein the interval between the tubes is 0.5 to 1.5 m/m. 3. Utility model registration claim No. 3, characterized in that it has a protruding means designed to cut off the upward movement of lubricating oil swirling upward along the outer surface of the tube at an intermediate position of the entire length of the tube, thereby reducing noise. The oil pickup structure according to item 1. 4. The oil pickup structure according to claim 1, wherein the projecting means is located at a position higher than the level of the lubricating oil.