KR20040017964A - Piston initial position control device for reciprocating compressor - Google Patents

Abstract

PURPOSE: An initial position adjusting device of a piston for a reciprocating compressor is provided to increase the productivity and adjust the initial position of the piston conveniently without assembling and disassembling by adjusting compression of a resonant spring with moving a spring base with a position adjusting bolt. CONSTITUTION: A reciprocating compressor includes a frame unit mounting two or more frames in a casing; a reciprocating motor having an outer stator and an inner stator fixed in the frame unit, and a mover linearly reciprocating between inner and outer stators; a compression unit having a cylinder inserted to the inner stator, and a piston sucking and compressing fluid with linearly reciprocating in the cylinder; and a resonant spring unit guiding resonance of the compression unit with supporting resonant springs in the spring support bar and the frame. A position adjusting bolt(120) is combined with an assembling hole(23a) of each rear frame(23), and the assembling depth is adjusted to adjust the position of the piston by regulating compressive force of the resonant spring.

Description

Piston Initial Position Control Device for Reciprocating Compressor {PISTON INITIAL POSITION CONTROL DEVICE FOR RECIPROCATING COMPRESSOR}

The present invention relates to a piston initial position adjusting device of a reciprocating compressor, and more particularly, to a piston initial position adjusting device of a reciprocating compressor to adjust the position of the piston by adjusting the position of the spring base.

In general, a reciprocating compressor is a piston that suctions and compresses and discharges gas while reciprocating in a cylinder, and FIG. 1 is a longitudinal sectional view showing an example of a conventional reciprocating compressor.

As shown in the drawing, a conventional reciprocating compressor includes a casing 10 having a gas suction pipe SP and a gas discharge pipe DP, a frame unit 20 elastically supported inside the casing, and a frame unit ( Fixed to 20), the reciprocating motor 30 in which the mover linearly reciprocates, and fixed to the frame unit 20 and coupled to the mover 33 of the reciprocating motor 30 to suck and compress the gas and discharge it. The compression unit 40 and the mover 33 of the reciprocating motor 30 are elastically supported together with the piston 42 of the compression unit 40 to resonate the mover 33 and the piston 42. It consists of a resonant spring unit 50 for inducing.

The frame unit 20 supports the cylinder 41 and the piston 42 of the compression unit 40 together with the front frame 21 and the front frame 21 for supporting one side of the reciprocating motor 30. The intermediate frame 22 is coupled to support the other side of the reciprocating motor 30, and the rear frame 23 is coupled to the intermediate frame 22 to accommodate the resonant spring unit 50.

The reciprocating motor 30 has an outer stator 31 positioned outside the cylinder 41 of the compression unit 40 and a front side of the front frame 21 with a predetermined gap inside the outer stator 31. To the piston 42 of the compression unit 40 via an inner stator 32 fixed to an outer circumferential surface thereof, and an air gap between the outer stator 31 and the inner stator 32. It consists of the movable body 33 which reciprocates linearly with the piston 42. As shown in FIG.

The compression unit 40 is coupled to the cylinder 41 to be inserted and fixed to the front frame 21 and the mover 33 of the reciprocating motor 30 to reciprocate in the compression space P of the cylinder 41. Piston 42 and the suction valve 43 which restricts suction of refrigerant gas while opening and closing the suction flow path F of the piston 42 and the cylinder 41. It is composed of a discharge valve assembly 44 mounted on the discharge side to limit the discharge of the compressed gas while opening and closing the compression space (P).

The resonant spring unit 50 is inserted between the outer circumferential surface of the cylinder 41 and the corresponding inner stator 32 and one end thereof is supported by the intermediate frame 22, while the other end of the movable member 32 and the piston 42 A plurality of front side resonance springs 52 supported on one side of the spring support member 51 coupled to the connecting portion, and one end to the other side of the spring support member while the other end is supported on the inner side of the rear frame 23 It consists of a plurality of rear side resonance spring (53).

The conventional reciprocating compressor as described above operates as follows.

That is, when power is applied to the outer stator 31 of the reciprocating motor 30, a flux is formed between the outer stator 31 and the inner stator 32 to form the movable element 33 and the piston 42. ) Are reciprocated in a straight line by the resonant spring unit 50 while moving along the direction of the flux, and with the piston 42 reciprocating in a straight line inside the cylinder 41, the cylinder 41 is compressed. By generating a pressure difference in the space P, a series of processes of inhaling the refrigerant gas, compressing it to a predetermined pressure, and then discharging the gas were repeated.

Here, in order to adjust the initial position of the piston 42 in consideration of the stroke distance of the piston 42, a separate spacer 60 between the intermediate frame 22 and the rear frame 23 as shown in FIG. The initial position of the piston 42 was adjusted with a solid line in the dotted line in the figure.

However, the piston initial position adjusting device of the conventional reciprocating compressor as described above, as described above, by inserting a separate spacer 60 between the intermediate frame 22 and the rear frame 23, both resonant springs 52, 53 It was to adjust the initial position of the piston 42 by adjusting the compression amount of), but after determining the thickness of the spacer 60, and after assembling the intermediate frame 22 and the rear frame 23, the piston 42 Since it is possible to determine whether the initial position of is properly adjusted, if the thickness of the spacer 60 is improperly determined, there is a problem of disassembling again and reassembling while repeating the above process.

The present invention has been made in view of the problems of the conventional reciprocating compressor as described above, it is an object of the present invention to provide a piston initial position adjusting device of the reciprocating compressor that can easily adjust the initial position of the piston.

1 is a longitudinal sectional view showing an example of a conventional reciprocating compressor.

Figure 2 is a longitudinal sectional view showing an example of adjusting the initial position of the piston in the conventional reciprocating compressor.

Figure 3 is a longitudinal sectional view showing an example for adjusting the initial position of the piston in the reciprocating compressor of the present invention.

4 is a detailed view showing part "A" of FIG.

5 is a perspective view showing a spring base in the reciprocating compressor of the present invention.

Figure 6 is a half cross-sectional view comparing before and after adjustment in the reciprocating compressor having an example of the piston initial position adjusting device of the present invention.

FIG. 7 is a detailed view showing a modification to the “A” part of FIG. 3.

8 and 9 are partial longitudinal cross-sectional view showing a modified example of the piston initial position adjusting device in the reciprocating compressor of the present invention and a perspective view showing an exploded view thereof.

** Description of symbols for the main parts of the drawing **

41 cylinder 42 piston

100: piston position adjusting unit 110: spring base

210: spring foot 120,220: position adjusting bolt

In order to achieve the object of the present invention, a frame unit for assembling and installing at least two or more frames in the casing, the outer stator and the inner stator fixed to the frame unit and linear reciprocating motion between the outer stator and the inner stator A reciprocating motor with a mover that is installed so that it can be installed, a cylinder that is fixedly installed on the frame unit, inserted into the inner circumferential surface of the inner stator, and slips into the cylinder, and is coupled to the mover of the reciprocating motor to make a straight line inside the cylinder. A compression unit with a piston to suction and compress the fluid during reciprocating motion, and a spring support coupled to the mover of the reciprocating motor and the piston of the compression unit, and resonating springs on both sides of the spring support and the corresponding frame respectively. To support one or more of the In a reciprocating compressor including a resonant spring unit for inducing a resonant motion, a plurality of position adjusting devices for fastening the resonant spring to a frame supporting the resonant spring and adjusting the compression amount of the resonant spring to adjust the position of the piston while adjusting the depth of the fastening. It provides a piston initial position adjusting device of a reciprocating compressor including a fastening member.

Hereinafter, the piston initial position adjusting device of the reciprocating compressor according to the present invention will be described in detail based on the embodiment shown in the accompanying drawings.

Figure 3 is a longitudinal sectional view showing an example for adjusting the initial position of the piston in the reciprocating compressor of the present invention, Figure 4 is a detailed view showing the "A" of Figure 3, Figure 5 is a spring base in the reciprocating compressor of the present invention Figure 6 is a perspective view, Figure 6 is a half cross-sectional view compared before and after adjustment in the reciprocating compressor with an example of the piston initial position adjustment device of the present invention.

As shown in the drawing, the reciprocating compressor according to the present invention includes a frame unit 20 elastically supported inside the casing 10 and a reciprocating type motor which is fixed to the frame unit 20 and generates a driving force in a straight line. It is coupled to and operated between the motor 30, the compression unit 40 supporting the frame unit 100 by suction and compressing the fluid, and the mover 33 of the frame unit 100 and the reciprocating motor 30. The resonant spring unit 50 for inducing the resonant movement between the ruler 33 and the piston 42 of the compression unit 40 and the frame unit 20 are fastened to the resonant spring unit 50. Piston position adjusting unit 100 to adjust the amount of compression).

The frame unit 20 supports one side of the outer stator 31 and the inner stator 32 of the reciprocating motor 30 together with a front frame for inserting and supporting the cylinder 41 of the compression unit 40. 21 and the outer stator 31 of the reciprocating motor 30 to support the other side of the outer stator 31 of the reciprocating motor 30 and to support the front side resonance spring 52 to be described later. Intermediate frame 22, which is coupled to the front frame 21 by a long fastening bolt (not shown), and inserted into the intermediate frame 22, the outer stator 31 and the inner stator 32 of the reciprocating motor 30 It consists of a rear frame 23 supporting the other side together and supporting the spring base 110 to be described later.

The rear frame 23 is formed at equal intervals in the circumferential direction of the fastening holes 23a to fasten the positioning bolt 120 for moving the spring base 110 to be disposed therein in the piston movement direction.

The reciprocating motor 30 has an outer stator 31 fixedly installed between the front frame 110 and the intermediate frame 120 and a cylinder of the compression unit 40 with a predetermined gap inside the outer stator 31. 41) The inner stator 32 press-fits to the outer circumferential surface, and is coupled to the piston 42 of the compression unit 40 via an air gap between the outer stator 31 and the inner stator 32, and the piston ( 42) and a movable element 33 which reciprocates in a straight line.

Compression unit 40 is coupled to the cylinder 41 to be inserted into the front frame 110 and fixed to the mover 33 of the reciprocating motor 30, the reciprocating motion in the compression space (P) of the cylinder 41 Piston 42 and the suction valve 43 which restricts suction of refrigerant gas while opening and closing the suction flow path F of the piston 42 and the cylinder 41. The discharge valve assembly 44 is mounted on the discharge side to limit the discharge of the compressed gas while opening and closing the compression space P.

The resonant spring unit 50 has one side of the spring support 51 coupled to the mover 33 of the reciprocating motor 30 and the piston 42 of the compression unit 40 and the reciprocating motor 30 corresponding thereto. And a front side resonant spring 52 provided in plurality between one side of the intermediate frame 120 in close contact with the side of the reciprocating motor 30 and the other side of the spring support 51 and It consists of a rear resonant spring (53) provided in plurality between the inner surface of the corresponding spring base (110).

The piston position adjusting unit 100 is disposed on the inner side of the rear frame 23 opposite the rear resonance spring 53 to support the rear end of the rear resonance spring 53 and the spring base 110. , The support is made of a positioning bolt 120 for fastening in the piston movement direction to the fastening hole 23a of the rear frame 23 to support the spring base 110 to move in the piston movement direction.

The spring base 110 is formed in an annular shape of the base body portion 111 made of metal so that each of the positioning bolts 120 are in contact with each other collectively, the appropriate position of the base body portion 111 (90 ° in the drawing) Spacing) is formed in the circumferential direction projecting the spring fixing protrusion 112 for fixing the above-mentioned resonant spring.

The spring base 110 is preferably formed so that the outer diameter of the base body 111 is almost similar to the inner diameter of the rear frame 23 in consideration of the movement of the spring base 110 in the piston direction.

The spring fixing protrusion 112 may be formed to be uneven in a simple protrusion shape as in FIG. 4, but in some cases, the threaded portion of the positioning bolt 120 may be inserted into the groove 112a as shown in FIG. 7. You may. In this case, as the spring base 110 and the positioning bolt 120 are coupled, the spring base 110 can move in a straight line when tightening and releasing the positioning bolt 120 and the piston 42 can reciprocate after assembly. You can eliminate the fear of twisting.

Positioning bolt 120 is preferably formed so that the diameter is as thick and short in length in order to withstand the elasticity of the strong resonant spring, but in some cases the spring fixing protrusion 111 of the spring base 110 as described above ), The straightness can be increased.

In the drawings, the same reference numerals are given to the same parts as in the prior art.

The reciprocating compressor of the present invention as described above is assembled as follows.

First, the cylinder 41 is inserted into and fixed to the front frame 21, the inner stator 32 of the reciprocating motor 30 is press-fitted to the outer circumferential surface of the cylinder 41, and the outer side of the inner stator 32 is fixed. The outer stator 31 is inserted at a predetermined gap to closely contact the front frame 21 and the intermediate frame 22 is in close contact with the other side of the outer stator 31. The outer stator 31 is fixed by tightening the front frame 21 and the intermediate frame 22.

Next, the mover 33 coupled to the piston 42 and the spring support 51 is inserted to move in a straight line between the outer stator 31 and the inner stator 32, but each spring mounting portion of the spring support 51 (Unsigned) is equipped with a front resonance spring 52 and a rear resonance spring 53 so that the front resonance spring 52 is closely fixed to the rear side of the intermediate frame 22, while the rear resonance The spring 53 is supported on the inner surface of the rear frame 23 to fix the rear frame 23 to the intermediate frame 22 by fastening bolts (not shown).

At this time, the inner side of the rear frame 23 is fixed to the spring base 110 in an annular shape and the respective rear-side resonant springs 53 are fixed to the spring fixing protrusion 111 of the spring base 110. At the same time as fastening the respective positioning bolts 120 with the fastening holes 23a of the rear frame 23 so that the positioning bolts 120 are in close contact with the rear surface of the spring base 110 described above. (23) is fixed to the intermediate frame (22).

Next, as illustrated in FIG. 6, the spring base 110 is moved to the front side or the rear side while the tightening degree of the tightening position of the positioning bolt 120 to be fastened to the fastening hole 23a of the rear frame 23 is resonated. Adjust the amount of compression of the (53) and through this adjust the cylinder insertion position of the piston 42 coupled through the spring support 51 by the appropriate length (L).

On the other hand, if there is a modification to the piston initial position adjusting device of the reciprocating compressor according to the present invention is as follows.

That is, in the above example, the rear frame 23 is provided with a spring base 110 moving forward and backward by the positioning bolt 120, but the present modification is positioned as shown in FIGS. 8 and 9. The adjustment bolt 220 to independently adjust the amount of compression of each of the rear resonant spring (53).

To this end, the spring foot 210 is inserted into the rear resonant spring 53 at the end of the fastening portion of the positioning bolt 220 coupled to the fastening hole 23a of each rear frame 23. In order to couple the spring foot 210 to the position adjusting bolt, a fitting protrusion 221 is formed at the end of the position adjusting bolt 220 and the fitting groove 221 is formed at the front end surface of the spring foot 210 corresponding thereto. ).

In this way, when determining the initial position of the piston, the initial position can be properly adjusted while the frame unit is assembled, and productivity can be improved by reducing the trouble of loosening and reassembling the frame unit.

Piston initial position adjusting device of the reciprocating compressor according to the present invention, by placing the spring base on the support surface of the frame for supporting the resonant spring and moving the spring base to the position adjusting bolt to adjust the amount of compression of the resonant spring or adjust the position adjusting bolt By adjusting the compression amount of the furnace resonant spring, it is possible to reduce the inconvenience of assembling, releasing and reassembling the frame unit to adjust the initial position of the piston, thereby increasing productivity of the reciprocating compressor.

Claims (6)

A frame unit for assembling and installing at least two frames inside the casing, an outer stator and an inner stator fixedly installed in the frame unit, and a movable member for linear reciprocating motion between the outer stator and the inner stator. The cylinder is fixedly installed in the reciprocating motor, the frame unit and inserted into the inner circumferential surface of the inner stator, and slides into the cylinder and is coupled to the mover of the reciprocating motor so that the fluid is sucked and compressed while performing a linear reciprocating motion inside the cylinder. Compression unit provided with a piston unit, a spring support coupled to the mover of the reciprocating motor and the piston of the compression unit, and supporting one or more resonant springs between both sides of the spring support and the corresponding frame, respectively. Resonant spring oil to induce resonant motion In the reciprocating compressor including the root, An initial position adjusting device for a piston of a reciprocating compressor including a plurality of position adjusting fastening members which are fastened to a frame supporting a resonant spring but adjust a compression amount of the resonant spring while adjusting a depth of fastening thereof. The method of claim 1, Piston initial position adjusting device of the reciprocating compressor, characterized in that between the resonant spring and the position adjusting fastening member through a spring base formed in an annular shape so as to correspond to all the position adjusting fastening members collectively. The method of claim 2, Piston initial position adjusting device of the reciprocating compressor, characterized in that the spring base to form a convex spring fixing protrusion for fixing the resonant spring. The method of claim 3, Piston initial position adjusting device of the reciprocating compressor, characterized in that the coupling is inserted into the position adjustment fastening member to the rear side groove portion of the spring fixing protrusion. The method of claim 1, Piston initial position adjusting device of the reciprocating compressor, characterized in that the end of the position adjustment fastening member is independently coupled to the spring foot to insert the resonator spring fixed to each spring foot. The method of claim 5, End of the position adjustment fastening member and the corresponding end of the spring foot is the piston initial position control device of the reciprocating compressor, characterized in that coupled to the projection and groove.