JP5091814B2 - Labyrinth piston reciprocating compressor - Google Patents

Description

  The present invention relates to a labyrinth piston type reciprocating compressor, and in particular, a marker is provided in a part of a labyrinth groove formed on an outer peripheral surface of the labyrinth piston, and the wear state of the labyrinth piston reaches a wear reference value by this marker. It is related with the novel improvement for enabling it to judge visually whether it is.

  In this type of labyrinth piston type reciprocating compressor that has been used in the past, the labyrinth piston itself is not subjected to any processing, and the labyrinth piston is removed from the compressor body during maintenance. When the outer diameter of the piston was measured and the amount of wear exceeded the reference value, the labyrinth piston was replaced.

  Further, as another conventional configuration, as an apparatus for measuring the wear amount of a sealing material for a general piston other than the labyrinth piston, for example, in the wear amount measuring apparatus for a sealing material for a piston disclosed in Patent Document 1, it is illustrated. However, when the seal material is not worn, the piston reciprocates in the horizontal direction with the shaft edge of the cylinder and the shaft edge of the piston aligned, and the operation particularly wears the lower part of the seal material. As a result, the piston is displaced downward. As a result, the detected member fixed to the end face of the piston on the cylinder head side is lowered, so that the light irradiated from the light source through the optical fiber strand of one group is concentric with the detected member. Depending on the combination of the projection and the groove, or the combination of the first and second regions, the amount of reflected light that is detected by reflection and received is changed. Thus, the wear amount of the sealing material can be measured.

Japanese Patent Publication No. 06-010604

  In this type of labyrinth piston type reciprocating compressor that has been used in the past, the labyrinth piston is not subjected to any processing. Remove the cover and intake / discharge cylinder valve, take out the labyrinth piston from the cylinder, measure the outer diameter and wear, and then install it again in the cylinder, and install the intake / discharge cylinder valve and cylinder valve cover. The series of operations required a great deal of labor and cost.

  Further, in the above-described piston seal material wear amount measuring apparatus of Patent Document 1, since the wear amount of the seal material is detected by a change in the amount of reflected light using an optical fiber, an optical device is mounted around the cylinder. As a result, the cylinder device has a complicated structure, and there are problems in terms of not only cost but also reliability and maintenance.

A labyrinth piston reciprocating compressor according to the present invention is a labyrinth piston reciprocating compressor that performs compression by reciprocating a labyrinth piston in a cylinder, and a labyrinth groove provided on an outer peripheral surface of the labyrinth piston. some of the provided marker of at least one location in the labyrinth piston reciprocating compressor the wear condition was configuration can be determined by the markers of the labyrinth piston, before Symbol marker prescribed in the labyrinth groove is formed in a height, said height is the height indicating the replacement timing of the labyrinth piston, before Symbol marker is provided at least one place on the respective labyrinth groove, and each marker along the axial direction are arranged in a straight line over the entire length, wherein each marker, the cylinder valve mosquitoes of the cylinder Ru configuration der exposed to face the over and inhaled or discharge cylinder valve ports of the cylinder suction cylinder valve or discharge cylinder valve is removed to a position inside the cylinder valve cover.

Since the labyrinth piston type reciprocating compressor according to the present invention is configured as described above, the following effects can be obtained.
That is, in the labyrinth piston type reciprocating compressor which performs compression by reciprocating the labyrinth piston in the cylinder, at least one marker is provided in a part of the labyrinth groove provided on the outer peripheral surface of the labyrinth piston. is provided, the state of wear of the labyrinth piston Ru can be determined by the marker.
Said marker, the are formed with a predetermined height labyrinth groove, the height Ri high Sadea showing a replacement time of the labyrinth piston, the marker is provided at least one place on the respective labyrinth groove and each marker is arranged linearly over the entire length along the axial direction, wherein each marker, the suction cylinder valve or discharge cylinder valve located inside the cylinder valve cover and the cylinder valve cover of the cylinder is removed is by the exposed faces the inhalation or discharge cylinder valve ports of the cylinder were, the wear state from shea cylinder outside without removing the labyrinth piston can direct visual like. In addition, the replacement time can be easily determined.

  In the present invention, a marker is provided in a part of the labyrinth groove formed on the outer peripheral surface of the labyrinth piston, and it is possible to visually determine whether or not the amount of wear of the labyrinth piston has reached the wear reference value by this marker. An object of the present invention is to provide a labyrinth piston type reciprocating compressor.

Hereinafter, preferred embodiments of a labyrinth piston type reciprocating compressor according to the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a frame having a substantially box shape as a whole. A crankshaft 2 is rotatably provided at a lower position of the frame 1, and a crankpin bearing 3 is provided on the crankshaft 2. The continuous bar 4 provided via the crosshead 6 is connected to the crosshead 6 via the crosshead pin 5.

  The crosshead 6 is provided so as to be movable up and down within the crosshead guide hole 7 of the frame 1, and a piston rod 8 connected to the upper portion of the crosshead 6 is a piston rod guide bearing located at the upper portion of the frame 1. 9, an oil draining ring 10, an oil retaining ring 11 and a packing box 12a are supported by a piston rod packing 13 of a cylinder 12 provided at the upper part of the frame 1 so as to be movable up and down.

A labyrinth piston 14 is vertically movable (a stroke indicated by a solid line and a dotted line) on an upper part of the piston rod 8 extending in the cylinder 12, and a cylinder cover 15 is provided on the upper part of the cylinder 12. Yes.
A cylinder valve cover 16 is provided at the outer peripheral position of the cylinder 12, and a pair of upper and lower intake cylinder valves 17 and a discharge cylinder valve 18 are detachably provided inside each cylinder valve cover 16.

The cylinder 12 is configured such that a cross-sectional view taken along the line A-A is shown in FIG. 2, and a suction cylinder valve port portion 20 is formed inside each suction cylinder valve 17.
Further, a discharge cylinder valve port portion 21 is formed inside each discharge cylinder valve 18, and the medium sucked from each intake cylinder valve port portion 20 passes through each discharge cylinder valve port portion 21. The medium is discharged out of the cylinder 12 and the medium is sucked / compressed.

  AA sectional view of FIG. 1 shown in FIG. 2 shows a state in which each cylinder valve cover 16, intake cylinder valve 17 and discharge cylinder valve 18 are removed, and is formed on the outer periphery of the labyrinth piston 14. A part of the ring-shaped labyrinth groove 22 is provided with at least one or a plurality of markers 23, and each marker 23 is made of, for example, the same material as the labyrinth groove 22, and in the removed state, The cylinder valve port portions 20 and 21 are exposed so as to be exposed.

  A plurality of labyrinth grooves 22 are formed at predetermined intervals along the axial direction on the outer periphery of the labyrinth piston 14, and each labyrinth groove 22 of the labyrinth piston 14 is formed as described later. It is formed along the axial direction Y and over the entire length in the axial direction Y.

  FIG. 4 shows a part of each labyrinth groove 22 and the marker 23 of FIG. 3, and each marker 23 in each labyrinth groove 22 extends along the axial direction Y as described above. It is arranged in a straight line over.

FIG. 5 is an enlarged sectional view showing the marker 23 provided in each labyrinth groove 22 of FIGS. 3 and 4, and each labyrinth groove 22 has a flat bottom or an arc-shaped bottom 24 on the bottom surface thereof. The tip of the ring-shaped protrusion 25A of the labyrinth piston 14 located between the labyrinth grooves 22, that is, the mountain-shaped wear portion 26 forming the outermost side, is composed of a pair of tapered walls 25, and shows the amount of wear protruding in the radial direction. The wear portion 26 is worn and the same position as the marker outer peripheral surface 23A of the marker 23 is set as the wear reference value T.
That is, as shown in FIG. 5, the marker 23 is configured in the labyrinth groove 22 with a predetermined height T ₁ up to the wear reference value T, and this height T ₁ is a height indicating the replacement time of the labyrinth piston 14. is there.

  The wear reference value T is the same as the marker outer peripheral surface 23A of the marker 23, and the marker outer peripheral surface 23A is set lower than the wear outer peripheral surface 26A, which is the outer peripheral surface of the labyrinth piston 14, by the wear reference value T. Has been.

  Next, the operation will be described. In the above-described configuration, the wear of the wear outer peripheral surface 26A, which is the outer peripheral surface of the new labyrinth piston 14 shown in FIGS. 4 and 5, progresses due to the operation of the compressor (the region indicated by the dots in FIG. 6). When the wear of the wear portion 26 increases and reaches the wear reference value T, the wear also spreads on the marker outer peripheral surface 23A of the marker 23 (the region indicated by the enlarged dots in FIG. 7), and the wear becomes the labyrinth piston 14 and the marker. 23 can be detected by visual observation (in addition to visual observation, a television screen, etc.), and wear can be determined. In this state, the replacement time of the labyrinth piston 14 has been reached. It will be.

  As shown in FIG. 2, the above-described visual inspection of the wear of the labyrinth piston 14 is performed by removing the cylinder valve cover 16, the intake cylinder valve 17, and the discharge cylinder valve 18. It can be easily performed by being exposed facing the port portion 20 and each discharge cylinder valve port portion 21.

Further, as shown in FIG. 8, the marker 23 that can actually be seen from the outside of the cylinder 12 includes the upper end C of the labyrinth piston 14 at the top dead center position indicated by a solid line and the bottom dead indicated by a dotted line. Although it is limited to the lower end portion C ′ of the labyrinth piston 14 at the point position, the intermediate portion E between the upper end portion C and the lower end portion C ′ of the labyrinth piston 14 cannot be visually observed in the above-described state. In order to see the part E, if the labyrinth piston 14 is removed from the cylinder 12 like the past, it can be visually observed.
As shown in FIGS. 3 and 4, the marker 23 is provided in each labyrinth groove 22 at least one location (or a plurality of locations is possible), and its full length along the axial direction Y of the labyrinth piston 14. It is preferable that they are arranged linearly.

It is a block diagram which shows the labyrinth piston type reciprocating compressor by this invention. It is AA sectional drawing of FIG. It is sectional drawing which shows a part of BB cross section of the labyrinth piston of FIG. It is an enlarged view of the principal part which shows the external appearance of the labyrinth piston of FIG. It is an expanded sectional view of the principal part of FIG. It is an enlarged view which shows the state of some before abrasion of the labyrinth piston of FIG. It is an enlarged view which shows the abrasion after the marker of FIG. FIG. 5 is a cross-sectional view showing a state where a part of the cylinder in the present invention is removed and the marker of the labyrinth piston is visible from the outside of the cylinder.

DESCRIPTION OF SYMBOLS 1 Frame 2 Crankshaft 3 Crankpin bearing 4 Connecting rod 5 Crosshead pin 6 Crosshead 7 Crosshead guide hole 8 Piston rod 9 Piston rod guide bearing 10 Oil draining ring 11 Oil retaining ring 12 Cylinder 12a Packing box 13 Piston rod packing 14 Labyrinth Piston 15 Cylinder cover 16 Cylinder valve cover 17 Suction cylinder valve 18 Discharge cylinder valve 20 Suction cylinder valve port portion 21 Discharge cylinder valve port portion 22 Labyrinth groove 23 Marker 23A Marker outer peripheral surface 24 Planar bottom 25 Tapered wall 25A Projection portion 26 Wear part 26A Wear outer peripheral surface T Wear reference value C Upper end C 'Lower end T ₁ Height Y Axial direction

Claims (1)

In the labyrinth piston type reciprocating compressor that performs compression by reciprocating the labyrinth piston (14) in the cylinder (12),
At least one marker (23) is provided in a part of the labyrinth groove (22) provided on the outer peripheral surface of the labyrinth piston (14), and the wear state of the labyrinth piston (14) is indicated by the marker (23). in La bi rinsing reciprocating piston compressor where the structure can be determined by, prior Symbol marker (23) is formed at a predetermined height (T ₁₎ in the labyrinth groove (22) in the height (T ₁₎ is the height indicating the replacement timing of the labyrinth piston (14), before Symbol marker (23), said provided at least one position in each labyrinth groove (22) within, and, each marker (23) linearly arranged over the entire length along the axial direction (Y), before Symbol each marker (23) is located inside the cylinder valve cover (16) and the cylinder valve cover (16) of the cylinder (12) The suction of the cylinder (12) from which the suction cylinder valve (17) or the discharge cylinder valve (18) is removed Features and to Lula bi rinse Reciprocating piston compressor that is exposed to face the use or discharge cylinder valve ports (20, 21).

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