JPS60175785A - Open type compressor - Google Patents

Abstract

PURPOSE:To save the space by making a recess in cover body for containing a coupling while to prevent mixing of oil into gas flow by returning oil directly from an oil sump into crank chamber. CONSTITUTION:A cover body 41 for closing the opening of machine frame body 2 is provided. A recess 41a is made in said cover body 41 toward the intake gas chamber 81 and a coupling 15 for coupling with an external drive means 16 is contained in said recess 41a. While an endboard 26 is provided in the recess 41 to form an oil sump 13. Furthermore, an oil hole 28 communicating between the oil sump 13 and crank chamber 7 is provided in the crank shaft 9.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Industrial Application Field The present invention relates to an improved structure of an open type compressor, and in particular, an intake gas chamber is formed adjacent to a crank chamber in which a compressor section is housed, This invention relates to an open type compressor that uses this suction gas chamber as a muffler or an accumulator.

(B) Prior Art Recently, open-type compressors in which a suction gas chamber is formed adjacent to a crank chamber are being adopted as compressors used for freezing and refrigeration. This is because this type of open compressor has a better C.0.P. (coefficient of performance) than a semi-hermetic or hermetic compressor for reasons explained below. That is, unlike semi-hermetic or hermetic compressors, an open-type compressor does not have a driving means such as an electric motor integrated therein, so that the intake gas is not directly heated by this driving means. This involves inhaling highly concentrated gas at low temperatures.
Since it can be compressed, C.0.P. is improved. In addition, the intake gas chamber formed adjacent to the crank chamber is a type of expansion chamber, and has the function of a muffling chamber that reduces noise caused by the pulsation of the intake gas. It also functions as a type of achievator that separates the liquid contained in the gas and sends only the gas to the compressor section.

This type of open type compressor was developed in the Utility Model Publication Act in 1983
It has already been disclosed in No. 667, etc., and is configured as shown in FIG. To explain below, (1) is the machine frame (
2) and a lid body (3) (4) that closes the opening of this machine frame body.
The main body of the case consists of 1 and 1. (5) is the machine frame (
2), and the inside of the case body (1) is connected to the compressor section (
6) is housed in the crank chamber (power and suction gas chambers (8). (9) is a bearing part Ql formed in this partition plate), and a lid body (with an oil pump αυ). 3
) is a crankshaft supported by a bearing part α2 formed in a. This crankshaft has one end (9a) connected to the lid (4).
) through the oil reservoir chamber (131 and mechanical seal 04 housed in this oil reservoir chamber).
4) Extracted outside. The compressor is driven by connecting the gas engine ae to one end (9a) of the crankshaft via a coupling (151). αn is the intake gas chamber (8) of the machine frame (2). ) is the intake port provided at the top of the side.

In an open compressor configured in this way, the suction port (
The gas introduced into the suction gas chamber (8) from Lη expands in the suction gas chamber and is muffled, and the liquid contained in the gas is separated to leave only gas. (
18i, the air is sucked into the compressor section (6) via the cylinder chamber wall. On the other hand, the suction gas is mixed into the suction gas chamber (8).
The oil returned to the inside is stored in the suction gas chamber, but here, the pressure in the suction gas chamber (8) is equalized by the pressure equalization hole (21) provided in the partition plate (5) to the crank chamber (7). The pressure in the suction gas chamber (8) must be set to approximately the same as that in the
The check valve (2]) provided at the bottom of the partition plate (5) is opened by the gas pressure flowing into the intake gas chamber, so the oil in the intake gas chamber flows through the check valve (21) into the crank chamber ( 7). The oil stored in the crank chamber (7) is transferred to the strainer c! by the oil pump aυ. 4
After the oil is pumped up through the oil supply hole (23) Y of the crankshaft (9), each sliding part is forcibly supplied with oil. Here, from the oil supply hole C231 of the crankshaft (9) to the partition plate (5
The oil supplied to the bearing part (IQI) of the bearing metal (
24) and flows into the oil 031 through the groove (c). After this, the remaining oil on the 0th floor of the oil sump room will be removed from the bearing metal 04.
) is overflowing from the end on the oil sump chamber side and dripping into the suction gas chamber (8).

As mentioned above, the open type compressor that is configured and operates in this manner reduces the noise caused by the pulsation of the suction gas in its suction gas chamber (8), and also separates the liquid component in the suction gas to produce only gas. This is effective in preventing compression of the liquid fed to the compressor section (6).

However, since the open type compressor having such a configuration has the following problems, improvement measures have been desired.

First of all, this type of open compressor has a suction gas chamber (
8), the aircraft is forced to be larger in size, but if the gas engine (161) is connected to one end (9a) of the crankshaft (9) via the coupling (151), the coupling αω Since a space module is added, a large space is required as a whole.Secondly, the excess oil in the oil sump chamber α3, where the mechanical seal α is housed, is transferred to the oil sump in the bearing metal (2). Since it overflows from the chamber side end, it is likely to be caught up in the gas flowing into the suction gas chamber (8), and oil compression may occur in the compressor section (6).

(c) Purpose of the Invention The present invention has been made in view of the above points, and its object is to provide a crankcase in an open type compressor that is equipped with a suction gas chamber adjacent to the crankcase. Conventionally, even if a drive means such as a gas engine is connected to one end of the shaft via a coupling, it does not require a large space.
This saves space as a whole and prevents excess oil in the oil sump housing the mechanical seal from getting caught up in the gas flow in the suction gas chamber and flowing into the compressor, causing oil compression. be.

B) Structure of the Invention According to the structure of the present invention, a case body is composed of a machine frame body and a lid body that closes the opening of the machine frame body, and a partition plate is sandwiched between the case body and the compressor is operated. The crankshaft, which forms a crank chamber in which the parts are housed and an intake gas chamber, and which is supported by a bearing formed in the partition plate, is connected to the crankshaft through a mechanical seal provided in the center of the lid. In an open type compressor that is led out of the main body, the lid is recessed toward the suction gas chamber side to form a recess, and a part of the recess is closed with an end plate to open the oil sump chamber. At the same time, a mechanical seal is housed in the oil reservoir chamber, and surplus oil in the oil reservoir chamber is returned to the crank chamber through an oil hole formed in the bearing, and a cup is installed in the recess. In addition to accommodating the ring to save space as a whole, the oil hole formed in the bearing allows excess oil in the oil reservoir chamber to be returned to the crank chamber without being caught in the intake gas flow. It is something.

(e) Examples Embodiments of the present invention will be described below based on the drawings.

(1) is a case body composed of a machine frame (2) and lids (3) and (41) that close the opening of the machine frame. (5) is integrally formed with the machine frame (2), and the case body (
1) Crank chamber (7) in which the compressor section (6) is housed
This is a partition plate that separates the intake gas chamber and the intake gas chamber. (9) is a crankshaft supported by a bearing part (101) formed on this partition plate and a bearing part (l) formed in a lid trap having an oil pump (lυ). One end (9a) is led out of the lid (41) through an oil reservoir (13) provided in the center of the lid (4I) and a mechanical seal (14) housed within this oil reservoir. Yes. 0
7) is an inlet provided at the upper part of the intake gas chamber [F]υ side of the machine frame (2).

Thus, the lid (41) is recessed toward the suction gas chamber @η side to form a recess (41a). And the lid body (41
) is partially closed by the end plate (c), forming an oil sump chamber (JS) in which the mechanical seal (14) is housed. (41)
It is completely sealed by an O-ring (2) held between the bearing part (101) and the bearing part (101). In addition, (2 dark house partition plate (
5) is an oil hole drilled in the bearing portion (101) and communicates between the oil reservoir chamber and the crank chamber (9). Q61 is a gas engine connected to one end (9a) of the crankshaft (9) via a coupling. In this case, the coupling (
15) is housed in the lid body (4υ recess (41a)).

In the open type compressor configured in this way, the suction port 0
The gas introduced into the suction gas chamber @1) from η expands in the suction gas chamber and is muffled, and the liquid contained in the gas is separated to leave only gas. (The oil is sucked into the compressor section (6) via the cylinder chamber (11).On the other hand, oil mixed with the suction gas and returned to the suction gas chamber υ is stored in the suction gas chamber. However, here, the pressure in the suction gas chamber a Since the check valve Qυ is opened by the gas pressure flowing into the intake gas chamber, the oil in the intake gas chamber is returned to the crank chamber (7) via the check valve (21). When the pressure inside the crank chamber (7) rises temporarily,
This prevents oil from flowing back due to forming etc. In addition, the oil stored in the crank chamber (7) is pumped up through the strainer @ by the oil pump 0υ, and then forcibly supplied to each sliding part through the oil supply hole (c) of the crankshaft (9). There is. Here, the crankshaft (
9) from the oil supply hole (c) to the bearing part (101) of the partition plate (5).
) is supplied to the bearing metal +241 groove (25
1 into the oil reservoir chamber (13), and maintains the sealing performance of the mechanical seal Q41. After this, oil sump chamber α
The remaining oil from ~ is returned to the crank chamber (power) via the oil hole (marked 2) in the bearing (101).

(f) Effects of the Invention As described above, the present invention comprises a case body consisting of a machine frame body and a lid body that closes the opening of the machine frame body, and a partition plate is sandwiched between the case body to compress the machine frame. A mechanical seal provided in the center of the lid body forms a crank chamber in which the machine part is housed and an intake gas chamber, and the crankshaft is supported by pressure on a bearing formed in the partition plate. In an open type compressor that is led out of the main body through This open-type compressor is constructed so that the oil is stored in the oil reservoir chamber with a mechanical seal, and the excess oil in the oil reservoir chamber is returned to the crank chamber through an oil hole formed in the bearing. When a gas engine is connected to the gas engine via a coupling, the coupling can be accommodated in the recessed portion of the lid, and as a whole does not require as much space as conventionally, space saving of the equipment can be achieved. In addition, the oil hole formed in the bearing part ensures that the excess oil in the oil reservoir chamber is returned to the crank chamber, so that the excess oil in the oil reservoir chamber is returned to the gas flowing into the intake gas chamber, unlike conventional oil reservoir chambers. It will not get caught and cause oil compression.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an open type compressor showing a conventional example, and FIG. 2 is a longitudinal sectional view of an open type compressor showing an embodiment of the present invention. (1)...Case body, (2)...Machine frame, (
3)... Lid body, (5)... Partition plate, (6)...
Compressor section, (7)...Crank chamber, (9)...Crankshaft, Q31...Oil reservoir chamber, ■...Mechanical seal, e2&...Oil hole, (4υ...Archive) body,
Glue...Suction gas chamber, (101)...Bearing part. Source: Sanyo Electric Co., Ltd. and one other agent: Patent attorney: Shizuo Sano

Claims (1)

[Claims] (The case body is composed of the machine frame and the lid that closes the opening of the machine frame, and the crank chamber and intake gas chamber where the compressor is housed are sandwiched between the case body and a partition plate. and an open compression type in which a crankshaft supported by a bearing formed on the partition plate is guided out of the main body via a mechanical seal provided in the center of the lid. In the machine, the lid body is formed with four parts recessed toward the suction gas chamber side, a part of these four parts is closed with an end plate to form an oil reservoir chamber, and the oil reservoir chamber is housed with a mechanical seal; An open type compressor characterized in that the remaining oil in the oil reservoir chamber is returned to the crank chamber through an oil hole formed in a bearing.