JPS6014981Y2 - reciprocating compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reciprocating compressor, and particularly to a reciprocating compressor whose crankshaft main bearing can be replaced without dividing the frame or removing the crank.

In the case of a compressor that has a main bearing inside the frame, such as a conventional four-row vertical compressor, the frame can be divided into an upper frame 1 and a lower frame 2 at the center of the crankshaft 3 attachment, as shown in Figure 1. It has a structure.

In this case, lower main bearings 4° 4', 4' are attached to the lower frame 2, which are divided into halves corresponding to the diameter of the crankshaft 3.
After setting the crankshaft 3, this lower main bearing 4.4', 4
At the top of each individual half of the upper main bearing 5.5', 5''
and the main bearing covers 6, 6', 6 on top of it.
“ will be installed.

Due to this structure, during overhaul, remove the upper frame 1, remove the main bearing covers 6゜6', 6'', and remove the upper main bearings 5.5', 5'' and the lower main bearings 4.4'4''. We were able to conduct an overhaul.

However, in the case of an integral frame in which the frame is not divided into an upper and a lower part as shown in Fig. 2, bearings 8,8'' are assembled into the inner surface of an integral main bearing casing 7.7''. It is attached to l,9.

Integrated main bearing casing 7 on both ends of these crankshafts
．． 7# can be removed and disassembled from both sides of the integral frame 9, but when disassembling the central bearing of the crankshaft 3 inside the frame 9, it is necessary to remove the crankshaft 3 from both ends of the integral frame 9. It cannot be worked on unless it is removed from the integral frame 9 along with the main bearing casing.

Furthermore, with this integrated frame 9, a configuration in which the lower main bearing, upper main bearing, and main bearing cover are arranged, as in the case where the frame is divided into upper and lower parts as shown in Fig. 1, cannot be implemented due to its structure. There was a drawback.

The purpose of the present invention is to eliminate the above-mentioned drawbacks and to provide a reciprocating compressor with a structure in which the main bearing provided in the center of the integral frame can be replaced without removing the crankshaft. The invention will be explained using examples and with reference to the drawings.

FIG. 2 is an explanatory perspective view of an embodiment of the present invention, in which holes io and io' necessary for incorporating the crankshaft 3 are formed in both walls of the integral frame 9, and holes io and io' are provided in the central part of the frame 9. There is also a similar hole 10'.

This hole 10s 10'w 10'' has a diameter larger than the largest diameter of the circle of the crank arm rotation locus of the crankshaft 3.

In the hole 10.10'' there is an integral main bearing casing 7, which has bearings 8, 8'' fitted into both ends of the crankshaft 3.
7″ is included.

In the center of the interior of the frame, there is a two-part main bearing casing 7' having a horizontally divided two-part bearing 8' corresponding to the hole 10'.

The main bearing casing 7' has a fastening bolt 11 for integrating the divided casings, and the fastening bolt 11 has a sunken shape so that the upper part thereof does not protrude from the outer peripheral surface of the main bearing casing 7'.

Further, a seat 14 for the main bearing casing 7' is provided inside the frame 9, and between this seat 14 and one crank arm 13 adjacent thereto, the width is larger than the width B of the main bearing casing 7'. A diameter portion 16 having a length approximately equal to the inner diameter of the bearing 8' is provided on the crankshaft 3, and a window 15 for tightening and removing the fastening bolt 11 is provided on the frame 9.

In addition, in practical terms, the main bearing casing 7' or the frame 9
Generally, there are several screw holes for disassembling and assembling the main bearing on either side.

A set bolt 12 is used to attach the main bearing casing 7' to a predetermined position on the frame 9, and the main bearing casing 7' is fixed to the frame 9 side by the set bolt 12.

When disassembling the bearing section of the compressor having this configuration, the bearings 8, 8'' on both sides can be disassembled by taking out the main bearing casing 7.7'' from the outside of the integral frame 9.

Regarding the bearing 8' in the center inside the frame 9,
First, the set bolt 12 that positions the main bearing casing 7' with respect to the frame 9 is removed, and then the main bearing casing 7' is placed on the diameter section 16 having a length larger than its width B on the side of the crank arm 13. Move horizontally.

At this time, if a disassembly/assembly jig is used using a screw hole for disassembly/assembly provided in either the main bearing casing 7' or the frame 9, the work will be facilitated.

After the main bearing casing 7' is moved, the fastening bolt 11
When the main bearing casing 7' is separated, the main bearing casing 7' is separated from the crankshaft 3 together with the bearing 8', and the window 15 is removed.
Therefore, it can be taken out of the integrated frame 9.

The above describes the disassembly procedure, but the same reverse procedure can be used when assembling.

With this structure, when the main bearing located in the center of the frame is disassembled and reassembled in the case of an integral frame, the divided main bearing casing can be moved on the crankshaft, so it can be assembled externally into the crankshaft 3. Since there is no need to take out the crankshaft together with the main bearing casing to the outside of the frame when it is assembled into the frame 9 or disassembled, it is not only easy to work with, but also can be disassembled in a short time.
It is possible to assemble it, and when only the central part needs to be inspected, it can be inspected only at that part.

Furthermore, for a multi-row compressor requiring three or more main bearings, if the structure of the present invention is adopted, the frame can be made into one piece instead of having to be divided into parts.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a conventional split frame compressor, and FIG. 2 is a partially removed perspective view of the integrated frame compressor of the present invention. 1... Upper frame, 2... Lower frame, 3... Crankshaft, 4.4', 4''...
...Lower main bearing, 5.5', 5"... Upper main bearing, 6.6', 6" - Main bearing cover, 7
, 7″...Main bearing casing, 7′...
- Split main bearing casing, 8.8'. 8"... Bearing, 9... Integral frame, 10, 10', 10"... Hole, 11...
...Tightening bolt, 12...Set bolt, 13
...Crank arm, 14...Seat, 1
5...window.

Claims (1)

[Scope of utility model registration request] A crankshaft and three or more sets of main bearings that support the crankshaft are arranged in a frame, and a hole is provided in each of the main bearing support portions of the frame, and an outer diameter portion that can be fitted into the hole and the main bearing are arranged in a frame. In a vertical reciprocating compressor in which a main bearing casing having an outer diameter and a fittable inner diameter is fitted into each of the holes, the main bearing casing inside the frame excluding the main bearing casings at both ends of the frame; and a means for fixing the main bearing integrally to the frame, and a means for fixing the main bearing casing to the frame, the main bearing casing being attached inside the frame. A reciprocating compressor, characterized in that the length of the shaft portion of the crankshaft is at least twice the width B of the main bearing casing, and the frame is provided with a working window.