JP4972040B2 - Gas compressor - Google Patents

Description

  The present invention relates to a gas compressor, and more particularly to an improvement in an oil separator that centrifuges oil from compressed gas discharged from a compressor body.

  Conventionally, a gas compressor (compressor) for compressing a gas such as a refrigerant gas and circulating the gas through the air conditioning system is used in an air conditioning system (hereinafter referred to as an air conditioning system).

  Here, a general compressor has a configuration including a compressor main body that compresses and discharges gas, and an oil separator that separates oil from the compressed gas discharged from the compressor main body.

  As an oil separator, for example, it has a cylindrical main body part whose one end is closed by an end wall part, and a cylindrical inner cylinder part that is substantially concentric with the main body part and provided inside the main body part. Then, a swirl flow of compressed gas is formed between the inner peripheral surface of the main body portion and the outer peripheral surface of the inner cylinder portion, and the oil component is centrifuged and reflected by the end wall portion in the inner space of the inner cylinder portion. What allows the compressed gas to pass through is known (patent document 1).

In the oil separator disclosed in Patent Document 1, the main body portion and the end wall portion are integrally formed by die casting, the inner cylinder portion is formed by a pipe member, and a part of the pipe member is formed. The pipe member is fixed to the main body part and a flange is formed at the end of the pipe, and the flange is fastened or swaged to the main body part with a bolt. As a result, the fixing to the main body is made strong.
JP 2000-170681 A

  However, in order to perform the press-fitting described above, it is necessary to accurately manage the inner diameter of the hole in the main body and the outer diameter of the expanded diameter portion of the pipe. It is also necessary to manage the surface roughness of the surface to be press-fitted. Furthermore, the process of performing a caulking process and a bolt fastening is also required.

  For this reason, the oil separator has a relatively simple structure, but the presence of these processes greatly affects the manufacturing cost.

  This invention is made | formed in view of the said situation, and it aims at providing the gas compressor which has an oil separator which can be manufactured with a simpler manufacturing process.

  The gas compressor according to the present invention integrally forms the main body portion and the inner cylinder portion having no end wall portion by die casting, and forms the end wall portion as a plate-like member separate from the main body portion, By inserting a plate-like member from an opening formed through the peripheral wall of the main body portion to form an end wall portion of the oil separator, by holding the plate-like member on the main body portion by the plate-like member holding portion, The manufacturing cost is reduced by eliminating the press-fitting step and the caulking step or the fastening step.

  That is, the gas compressor according to the present invention includes a compressor main body and an oil separator that is assembled to the compressor main body and separates oil from the compressed gas discharged from the compressor main body. The vessel has a substantially cylindrical main body, a cylindrical inner cylinder substantially concentric with the main body and provided inside the main body, and an end wall that closes one end of the main body. And forming a swirling flow of the compressed gas between the inner peripheral surface of the main body portion and the outer peripheral surface of the inner cylinder portion to centrifuge the oil component, and the inner space of the inner cylinder portion In addition, the compressed gas reflected by the end wall portion is allowed to pass therethrough, and the main body portion and the inner cylinder portion are integrally formed by die casting, and the main body portion has a cylindrical shape. An opening is formed through the peripheral wall along a plane substantially perpendicular to the axis, and the end wall portion is A plate-like member formed separately from the main body portion and the inner tube portion, and is disposed by being inserted into the main body portion from an opening formed in the main body portion, and the plate-like member is disposed in the main body portion It has the plate-shaped member holding part hold | maintained in the state inserted in the part, It is characterized by the above-mentioned.

  According to the gas compressor configured as described above, the main body portion and the inner cylinder portion are integrally formed by die-casting, so that it is not necessary to press-fit and crimp or fasten both, thereby reducing the manufacturing cost. Can be achieved.

  Here, in order to integrally form the main body portion and the inner cylinder portion by die casting, the end wall portion needs to be separate from the main body portion.

  And since an end wall part is a plate-shaped member, it can manufacture easily rather than forming the pipe member which is a conventional inner cylinder part, and also, for example, the hole for oil draining is formed in this end wall part. Even when it is necessary to form, the hole can be formed in advance with a mold when blanking the outer shape of the plate-like member with a press or in the case of casting. It will not be an increase factor.

  In addition, the step of inserting the plate-like member from the peripheral wall of the main body and the step of holding the plate-like member in the main body by the plate-like member holding portion are more steps than conventional, but these steps are conventional pipes. Compared with the process of press-fitting and crimping or fastening a member, this is an extremely simple process, and as a whole, the manufacturing cost can be greatly reduced as compared with the conventional process.

  Thus, according to the gas compressor concerning the present invention, it can have an oil separator which can be manufactured by a simpler manufacturing process.

  In the gas compressor according to the present invention, the opening of the main body is formed facing the outer surface of the compressor main body, and the end of the oil separator is assembled to the compressor main body. It is preferable that the outer surface of the compressor main body, in which the rear end portion in the insertion direction of the end wall portion in the state where the wall portion is inserted into the main body portion approach or abut, is formed as the plate-like member holding portion. .

  According to the gas compressor having such a preferable configuration, the plate-shaped member holding portion (the outer surface of the compressor main body) is brought close to the rear end portion in the insertion direction of the plate-shaped member by assembling the oil separator to the compressor main body. Alternatively, since the plate-like member is abutted, the plate-like member can be suppressed or prevented from moving in the direction opposite to the insertion direction from the main body portion, and thereby the plate-like member can be held by the main body portion. Since the process of holding the main body part is automatically completed by assembling the oil separator to the compressor main body, there is no need to add a new process of holding the plate-like member to the main body part, increasing the number of manufacturing processes. It can be avoided.

  According to the gas compressor according to the present invention, the main body portion and the inner cylinder portion are integrally formed by die-casting, so that it is not necessary to press-fit and crimp or fasten both, thereby reducing the manufacturing cost. be able to.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best embodiment of the gas compressor of the invention will be described with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing a vane rotary compressor 100 which is an embodiment of a gas compressor according to the present invention.

  The illustrated compressor 100 is configured, for example, as a part of an air conditioning system (hereinafter simply referred to as an air conditioning system) that performs cooling using the heat of vaporization of a cooling medium, and condensing that is another component of the air conditioning system. Along with a condenser, an expansion valve, an evaporator, and the like (all not shown), they are provided on a cooling medium circulation path.

  The compressor 100 compresses the refrigerant gas G (gas) as a gaseous cooling medium taken from the evaporator of the air conditioning system, and supplies the compressed refrigerant gas G to the condenser of the air conditioning system. The condenser liquefies the compressed refrigerant gas G and sends it to the expansion valve as a high-pressure liquid refrigerant.

  The high-pressure liquid refrigerant is reduced in pressure by the expansion valve and sent to the evaporator. The low-pressure liquid refrigerant absorbs heat from ambient air and vaporizes in the evaporator, and cools the air around the evaporator by heat exchange with the heat of vaporization.

  The compressor 100 is housed in the housing 10 including the case 11 and the front head 12, and includes a compressor body 60 that compresses the refrigerant gas G (gas, compressed gas) by rotating the rotating shaft 51, and a compression. A cyclone block 70 (oil separator) that separates the refrigerating machine oil R (oil component) from the high-pressure refrigerant gas G discharged from the compressor main body 60 and the rotary shaft 51 of the compressor main body 60 are assembled to the main body 60 of the compressor. It is the structure provided with the driving force connection / disconnection part 80 which connects / disconnects the rotational driving force which should be transmitted.

  The compressor main body 60 accommodated in the housing 10 includes a rotating shaft 51 that is driven to rotate about an axis, a columnar rotor 50 that rotates integrally with the rotating shaft 51, and an outer peripheral surface of the rotor 50. Is embedded in the outer periphery of the rotor 40 and the outer periphery of the rotor 50 so that the outer end of the cylinder 40 can protrude outwardly. The amount of protrusion is variable so as to follow the contour shape of the inner peripheral surface 49, five plate-like vanes 58 embedded in the rotor 50 at equal angular intervals around the rotation shaft 51, and both open end surfaces of the cylinder 40 The front side block 30 and the rear side block 20 are fixed so as to cover the open end surface from the outside.

  The volume of each compression chamber 48 defined by the two side blocks 20, 30, the rotor 50, the cylinder 40, and the two vanes 58, 58 that precede and follow the rotation direction of the rotation shaft 51 is By repeating the increase / decrease according to the rotation, the refrigerant gas G sucked into each compression chamber 48 is compressed and discharged.

  One of the portions of the rotary shaft 51 protruding from both end surfaces of the rotor 50 is pivotally supported by the bearing portion 32 of the front side block 30 and extends outward through the front head 12. ing.

  Similarly, the other side of the protruding portion of the rotating shaft 51 is pivotally supported by the bearing portion 22 of the rear side block 20.

  The case 11 has a cylindrical body that is open at one end, and the front head 12 is assembled so as to cover the opened portion of the case 11 to form a housing space inside the housing 10.

  The driving force connecting / disconnecting portion 80 is disposed in a pulley 82 that is rotatably supported outside the boss of the front head 12 via a radial ball bearing 14, and in an annular space formed inside the pulley 82. 12 and an armature 83 fixed to the rotary shaft 51 and abutting against the side wall 82a of the pulley 82 by the magnetic force generated by energizing the electromagnetic coil 81 and rotating integrally with the pulley 82. ing.

  The front head 12 is formed with a suction port 12a through which a low-pressure refrigerant gas G is sucked from the evaporator. A check valve 12b for preventing the refrigerant gas G from flowing backward is provided in the suction port 12a. Yes.

  The suction port 12a communicates with a suction chamber 34 formed between the front side block 30 and the front head 12 of the compressor body 60 accommodated in the housing 10, and the refrigerant gas G 34 is sucked into the compression chamber 48 of the compressor main body 60 through the suction hole 31.

  On the other hand, the case 11 is formed with a discharge port 11a for discharging the high-pressure refrigerant gas G compressed by the compressor body 60 to the condenser.

  The discharge port 11a communicates with a discharge chamber 21 formed between the rear side block 20 of the compressor main body 60 and the case 11 accommodated in the housing 10, and the refrigerant gas G is supplied to the compressor main body 60. Is discharged into the discharge chamber 21 through the cyclone block 70.

  The cyclone block 70 is assembled to the outer surface 29a of the rear side block 20 of the compressor main body 60 with a fastening member such as a bolt (not shown), and is substantially concentric with the main body 71 and the main body 71. A cylindrical inner cylinder 72 provided inside the main body 71 and a bottom wall plate 74 (plate-like member) as an end wall that closes the lower end 71d (see FIG. 2) of the main body 71. ), A swirl flow of the refrigerant gas G discharged from the compression chamber 48 is formed between the inner peripheral surface of the main body 71 and the outer peripheral surface of the inner cylinder portion 72, and the refrigerating machine oil R is centrifuged. At the same time, the refrigerant gas G reflected by the bottom wall plate 74 is passed through the inner space of the inner cylindrical portion 72.

  Here, the main body portion 71 and the inner cylinder portion 72 are integrally formed by die casting via the connection portion 73.

  Further, as shown in FIG. 2, the main body 71 has an opening 71b formed through the cylindrical portion 71a (peripheral wall) along a surface substantially orthogonal to the axis C of the cylindrical portion 71a (cylindrical shape). Yes. The opening 71b has a width that is larger than the inner peripheral diameter of the cylindrical portion 71a and smaller than the outer peripheral diameter. As a result, in the vicinity of the lower end 71d of the inner peripheral surface of the main body 71, the opening 71b extends substantially horizontally. A groove 71c is formed.

  The bottom wall plate 74 formed separately from the main body portion 71 and the inner cylinder portion 72 is inserted into the main body portion 71 from the opening 71b in the direction of arrow M along the groove 71c. In this state, it functions as the bottom wall of the main body 71.

  Here, the opening 71b of the main body 71 is formed toward the outer surface 29a of the rear side block 20 of the compressor main body 60, and the cyclone block 70 is assembled to the compressor main body 60 in the direction of the arrow M ′ (see FIG. 1), the rear end 76 in the insertion direction of the bottom wall plate 74 in a state in which the bottom wall plate 74 is inserted into the main body 71 is in contact with (or close to) the outer surface 29a of the rear side block 20. .

  That is, the outer surface 29 a of the rear side block 20 functions as a bottom wall plate holding portion (plate member holding portion) that holds the bottom wall plate 74 in a state of being inserted into the main body portion 71.

  According to the compressor 100 according to the present embodiment configured as described above, the main body portion 71 and the inner cylinder portion 72 of the cyclone block 70 are integrally formed by die casting. Thus, there is no need for press-fitting and caulking or fastening, and the manufacturing cost can be reduced.

  Further, since the bottom wall plate 74 serving as the end wall portion of the cyclone block 70 is a flat member, it can be easily formed by simply punching (blanking) with a press, for example, in a conventional oil separator. It can be manufactured more easily than forming a pipe member (inner cylinder) which is a component formed separately from the main body.

  Of course, even if the bottom wall plate 74 is cast, a pipe member as an inner cylinder portion is formed as in the prior art, and it is simpler than forming a diameter-enlarged portion and a flange portion for press-fitting into this pipe member. Can be manufactured.

  Moreover, even if the bottom wall plate 74 is formed with the oil drain hole 75 formed for discharging the refrigerating machine oil R from the inside of the cyclone block 70, the outer shape of the bottom wall plate 74 can be pressed. At the time of blanking or in the case of casting, the hole 75 can be formed in advance with a mold, so that it does not increase the manufacturing cost.

  Moreover, although the process of inserting the bottom wall plate 74 from the cylinder part 71a of the main body 71 is a process that is increased as compared with the conventional process, this process is compared with the process of press-fitting and crimping or fastening the conventional pipe member. Since this is an extremely simple process, the manufacturing cost can be greatly reduced as a whole as compared with the conventional method.

  Further, since the main body portion 71 and the inner cylindrical portion 72 are not integrated by press-fitting as in the prior art, the press-fitting allowance between the both 71 and 72 is unnecessary, and the length corresponding to the press-fitting allowance that is no longer necessary. The upper end edge position of the inner cylinder part 72, that is, the position of the connection part 73 can be set to a position lower than the conventional position. As a result, the space above the cyclone block 70 in the case 11 can be secured wider than before, and for example, the refrigerant gas G that has moved up the inner space of the inner cylindrical portion 72 is placed in the space above the space. A baffle plate extending in the illustrated horizontal direction to be collided can also be provided. This baffle plate separates the refrigerating machine oil R still mixed in the refrigerant gas G when the raised refrigerant gas G collides, and the oil separation performance can be further improved.

  Thus, according to the compressor 100 which concerns on this embodiment, it can have the cyclone block 70 which can be manufactured with a simpler manufacturing process.

  Furthermore, according to the compressor 100 according to the present embodiment, the outer surface 29a of the rear side block 20 (the outer surface of the compressor body, the plate-like member holding member) is assembled by assembling the cyclone block 70 to the compressor body 60 in the direction of the arrow M ′. Portion) abuts (or is close to) the rear end portion 76 in the insertion direction of the bottom wall plate 74, so that the bottom wall plate 74 is prevented (or suppressed) from moving from the main body portion 71 in the direction M 'opposite to the insertion direction. Thus, the bottom wall plate 74 can be held by the main body 71, but the step of holding the bottom wall plate 74 by the main body 71 is performed by assembling the cyclone block 70 to the compressor main body 60. Since it is completed automatically, there is no need to add a new process for holding the bottom wall plate 74 to the main body 71, and the manufacturing process can be increased. It is possible to avoid.

  In addition, although the compressor 100 of embodiment mentioned above is a gas compressor of a vane rotary type, the gas compressor which concerns on this invention is not limited to the thing of the vane rotary type of embodiment, Other types The present invention can also be applied to gas compressors such as a swash plate reciprocating type or a scroll type gas compressor.

It is a longitudinal section showing a vane rotary type compressor which is one embodiment of a gas compressor concerning the present invention. It is sectional drawing which shows two components (a main-body part and a bottom wall plate) which comprise the cyclone block in FIG.

Explanation of symbols

20 Rear side block (part of compressor body)
29a outer surface (plate-shaped member holding part)
70 Cyclone block (oil separator)
71 Body portion 71a Tube portion 71b Opening 71c Groove 71d Lower end (one end)
72 Inner cylinder part 74 Bottom wall plate (plate member, end wall part)
76 Insertion direction rear end portion 100 Compressor (gas compressor)

Claims (2)

A compressor main body, and an oil separator that is assembled to the compressor main body and separates oil from the compressed gas discharged from the compressor main body,
The oil separator closes a substantially cylindrical main body, a cylindrical inner cylinder substantially concentric with the main body and provided inside the main body, and one end of the main body. An end wall portion, and a centrifugal flow of the compressed gas is formed between the inner peripheral surface of the main body portion and the outer peripheral surface of the inner cylinder portion to centrifuge the oil, and the inner cylinder portion The compressed gas reflected by the end wall portion is passed through the inner space of
The main body portion and the inner cylinder portion are integrally formed by die casting, and the main body portion has an opening formed through a peripheral wall along a surface substantially orthogonal to the cylindrical axis. ,
The end wall portion is a plate-like member formed separately from the main body portion and the inner cylinder portion, and is disposed by being inserted into the main body portion from an opening formed in the main body portion,
A gas compressor comprising a plate-like member holding portion that holds the plate-like member inserted into the main body portion.   The opening of the main body is formed facing the outer surface of the compressor main body, and the end wall is inserted into the main body with the oil separator assembled to the compressor main body. 2. The gas compressor according to claim 1, wherein an outer surface of the compressor main body, to which a rear end portion in the insertion direction of the end wall portion approaches or abuts, is formed as the plate-like member holding portion.

Images