JPS6118252Y2 - - Google Patents

Description

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

In the case of a compressor that has a main bearing in the frame, such as the four conventional vertical compressors, the frame can be divided into an upper frame 13 and a lower frame 14 at the center of the crankshaft 2, as shown in FIG. It is common to have a similar structure. In this case lower frame 1
The lower main bearings 15, 15, 15, which are divided into halves corresponding to the shaft diameter of the crankshaft 2, are attached to the 4, and after the crankshaft 2 is set, the lower main bearings 15, 1
Upper main bearing 1 of each individual half on the upper part of 5, 15
5', 15', 15' are placed thereon, and main bearing covers 16, 16, 16 are placed on top of these. Due to this structure, during overhaul, the upper frame 13 must be removed and the main bearing covers 16 and 1 must be removed.
6, 16, and upper main bearing 15, 15,
15. It was necessary to disassemble and inspect the lower main bearings 15, 15, 15.

In addition, in the case of a one-piece frame in which the frame is not divided into upper and lower parts, conventionally, when disassembling the bearings other than both ends of the crankshaft, the crankshaft 2 was pulled out of the frame with the main bearing casing and main bearing still attached. After that, it was necessary to disassemble each main bearing casing, which was quite a hassle.
For this reason, those with an integral frame structure are limited to those with two main bearings, and those with three or more main bearings are generally of the frame disassembled type.

This invention eliminates the above-mentioned drawbacks of integral frame type reciprocating compressors that have three or more main bearings, and makes it possible to disassemble and replace all the main bearings in the frame without removing the crankshaft from the frame. The purpose is to provide a reciprocating compressor.

Next, the present invention will be explained based on FIGS. 1 and 2 of the accompanying drawings showing one embodiment thereof.

Walls 1 on both sides of integral frame 1 of reciprocating compressor
A hole 3 having an inner diameter large enough to accommodate the crankshaft 2 is provided in each of the holes a and 1b. At the bearing installation location in the frame 1, there is a wall 1a,
A required number of wall-shaped seats 4 are provided in parallel with 1b, and these seats 4 are provided with a required number of holes 3' similar to the holes 3 described above. An integral main bearing casing 6 is installed in each of the holes 3 to support main bearings 5 fitted to both ends of the crankshaft 2. A main bearing casing 6', 6'', which is divided into two parts, is installed in the hole 3' to support a horizontally divided main bearing 5', 5'', which is provided at the bearing installation location of the crankshaft 2. ing. The main bearing casing 6' is provided with through holes 6'a for the fastening bolts 7, and the main bearing casing 6'' is provided with a required number of threaded holes 6"a for the fastening bolts 7. The fastening bolt 7 can fix these divided main bearing casings 6', 6'' together.
In addition, the bolt head is sunken so that it does not protrude from the outer peripheral surface of the main bearing casing 6'. The set bolt 8 is provided to restrict the axial position of the integrated main bearing casings 6', 6'' relative to the seat 4 and prevent their rotation. Adjacent walls of the main bearing casing 6 of the crankshaft 2 Inside 1b are two collars 9 and 9'.
are integrally attached by fastening bolts 10. The axial length of the collars 9, 9' has a width (length) C that is larger than the width of the main bearing casing 6', that is, the axial length B. crankshaft 2
A shaft extension portion 11 having a length equal to or greater than the width C is provided on the outside of the wall 1a. The frame 1 is provided with windows 12 at necessary locations for disassembling and assembling the main bearing, and windows 12' for disassembling and assembling the collar. Of course, the collars 9, 9' may be provided on the wall 1a side, and the shaft extension portion 11 may be provided on the wall 1b side.

Note that it is expected that it will be difficult to install the main bearing casings 6' and 6'' inside the frame 1 due to deflection due to the weight of the crankshaft 2 during disassembly and reassembly, so the holes 3' should be tapered as shown in Figure 2. form into a shape,
Forming the outer periphery of the main bearing casings 6', 6'' in a tapered shape to match this will not only make installation easier, but also increase the clearance between the hole 3' and the main bearing casings 6', 6'' during use. It is also possible to eliminate the problem of increased numbers. In this case, a screw hole for the set bolt 8 is provided in the axial direction of the seat 4 and the retainer plate 17 is tightened with the set bolt 8 so that there is no gap between the hole 3' and the main bearing casings 6', 6''. 17 are generally provided on the same circumference.Also, instead of this fastening method, a parallel part is provided on the small diameter side of the main bearing casing 6', 6'' to form a threaded part. It goes without saying that the purpose of fastening may be achieved by a nut that is screwed into the material, and is not limited to the method disclosed herein. If desired, this tapered main bearing casing may be used with integral main bearing casings at both ends of the frame. The collars 9, 9' are attached to the crankshaft 2 during operation of the reciprocating compressor.
The shaft extension part 11 prevents the crankshaft 2 from coming off the main bearing 5 when the crankshaft 2 is moved by a width C for disassembly and assembly. Therefore, it is necessary.

Since the present invention has the above-described structure, when disassembling it, first insert a tool through the window 12' and remove the fastening bolt 10 that connects the collars 9, 9' together, and then remove the separated collar 9. and 9' from the window 12', then remove the set bolt 8, free the axial position of the seat 4 of the frame 1 and the main bearing casing 6'' (or 6'), and move the crankshaft 2 to the right side in the figure. When the main bearing casings 6', 6'' in the frame 1 are moved in the opposite direction, the main bearing casings 6', 6'' in the frame 1 eventually separate from their respective seats 4, and the fastening bolts 7 are removed from the respective windows 12, and the separated main bearing casings 6', 6'' are removed. Then, the main bearings 5', 5'' may be taken out through the window 12 and inspected or replaced. When assembling, follow the above steps in reverse. In addition, the main bearing 5 and the main bearing casing 6 at both ends of the frame 1
It goes without saying that disassembly and assembly are carried out from the left or right side of the crankshaft 2, respectively.

Since the present invention has the above-described structure, when disassembling the main bearings of a reciprocating compressor that has three or more sets of main bearings installed in an integrated frame, it is possible to simply remove the crankshaft from the frame as in the conventional case. By moving the crankshaft from the frame by a length equivalent to the width of the main bearing casing, each main bearing casing and each main bearing inside the frame can be taken out from the window, which not only simplifies the work, but also When the number of main bearings is four or more, the length of the crankshaft can be made shorter than a structure in which a space for disassembling the main bearings is provided in the crankshaft section adjacent to each main bearing casing, and many This has a significant effect on reducing the size of reciprocating compressors in designs that require the provision of main bearings.

[Brief explanation of the drawing]

Figure 1 is a perspective view with parts removed to explain the integral frame type reciprocating compressor of the present invention, Figure 2 is a partial sectional view showing another embodiment of the main bearing of the present invention, and Figure 3 is a conventional split frame type reciprocating compressor. It is an explanatory exploded perspective view of a reciprocating compressor. 1... one-piece frame, 2... crankshaft,
3, 3'... Hole, 4... Seat, 5, 5', 5''... Main bearing, 6, 6', 6''... Main bearing casing, 7...
...Tightening bolt, 8...Set bolt, 9,9'...
... Collar, 10 ... Fastening bolt, 11 ... Shaft extension, 12, 12' ... Window, 17 ... Holding plate.

Claims (1)

[Scope of utility model registration request] A crankshaft 2 and three or more sets of main bearings 5, 5', 5'' supporting the crankshaft 2 are arranged in an integrated frame 1, and the main bearings 5,
5', 5'' support points 1a, 1b, 4 are provided with holes 3, 3, 3', respectively, and the outer diameter parts that can be fitted into the holes and the outer diameters of the main bearings 5, 5', 5'' are fitted. In a reciprocating compressor in which main bearing casings 6, 6', and 6'' having inner diameter parts that can be fitted together are respectively fitted into the holes,
Main bearing casings 6, 6 at both ends of the frame 1
Main bearing casing 6' inside frame 1 excluding
6'' and the main bearings 5', 5'' are each split type, and a means for integrally fixing the main bearings 5', 5'' and a means for fixing the main bearing casing to the frame are provided. collars 9, 9, which can be divided into crankshaft parts in the frame 1 on one side of the main bearing casings 6, 6 at both ends, and have a width C larger than the width B of the main bearing casings 6', 6'';', and a means for integrally fixing the collars 9, 9', and a shaft extension part 11 having a length not less than the width C outside the frame 1 on the other side of the main bearing casings 6, 6 at both ends. A reciprocating compressor characterized in that the frame 1 is provided with working windows 12 and 12'.