CN218408506U - Stuffing box for oil-free piston compressor - Google Patents

Abstract

The utility model discloses a stuffing box for oil free piston compressor, the stuffing box sets up between compression cylinder and guide cylinder, include: a first hole provided at an upper portion of the stuffing box, the first hole releasing the conductive pressure of the compression cylinder side; the second hole is arranged at the lower part of the stuffing box and is matched with an external part to balance air pressure fluctuation in the guide air cylinder; and the third hole is arranged in the middle of the stuffing box and is matched with an external part to measure the air pressure value in the stuffing body. Set up first hole pair compression cylinder side at gland box upper portion and carry out the pressure release, set up the atmospheric pressure that the balanced direction cylinder side of second hole was located in the lower part to this promotes the life of gland box, sets up the third hole in the middle part and judges its wearing and tearing condition through measuring the atmospheric pressure value in the gland, so that in time change the gland that the life-span was used up.

Description

Stuffing box for oil-free piston compressor

Technical Field

The utility model relates to an oil free piston compressor field, in particular to a stuffing box for oil free piston compressor.

Background

Most of the existing vertical, V-type and W-type piston air compressors are composed of a piston rod, a crank and a crankshaft connecting rod to form a transmission system, the piston rod and the crankshaft connecting rod are connected through a crosshead, and pressure lubrication is adopted to assist a piston rod oil scraper ring and a packing mechanism to seal and work.

In order to achieve a compact compressor, the applicant tried to eliminate the original crosshead and piston rod scraper ring structure and reduce the volume of the stuffing box. However, as the volume of the stuffing box is reduced, the pressure bearing performance is also reduced synchronously, so that the service life of the stuffing body is shortened due to the pressure from the compression cylinder and the guide cylinder.

SUMMERY OF THE UTILITY MODEL

In order to realize the purpose, the utility model discloses the technical scheme who adopts is:

a stuffing box for an oil-free piston compressor, the stuffing box disposed between a compression cylinder and a guide cylinder, comprising:

a first hole provided at an upper portion of the stuffing box, the first hole releasing the conductive pressure of the compression cylinder side;

a second hole arranged at the lower part of the stuffing box, wherein the second hole is matched with an external member to balance air pressure fluctuation in the guide air cylinder;

the third hole is arranged in the middle of the stuffing box, and the third hole is matched with an external member to measure the air pressure value in the stuffing body.

In a preferred embodiment of the present invention,

the upper part of the stuffing box is provided with a first cavity, and the first cavity is connected with the bottom of the compression cylinder and forms a sealed space together with the compression cylinder;

a second cavity is formed in the lower portion of the stuffing box, is connected with the top of the guide cylinder and forms a sealed space together with the guide cylinder;

and the middle part of the stuffing box is provided with a stuffing cavity, and the stuffing cavity is matched with the first cavity and the second cavity through a stuffing body to form respective sealing spaces.

In a preferred embodiment of the present invention, a first cavity side chamber is disposed on one side of the first cavity, and the first cavity side chamber communicates with the outside through a first hole to release the pressure of the compression cylinder side.

In a preferred embodiment of the present invention, one side of the second cavity side chamber is provided with a second cavity side view, and the second cavity side view absorbs the pressure of the guide cylinder side through the second hole and the external connection communication.

In a preferred embodiment of the invention, the packing body is press-fitted into the packing cavity from the upper side by a fixing member.

In a preferred embodiment of the present invention, an upper port is disposed at an upper portion of the first cavity, and a lower port is disposed at a lower portion of the second cavity;

the upper connector and the lower connector are both provided with flange edges, and the flange edges are used for connecting the stuffing box with the compression cylinder and the guide cylinder.

The beneficial effects of the utility model reside in that:

the utility model provides a stuffing box for oil free piston compressor sets up first pore pair compression cylinder side on stuffing box upper portion and carries out the pressure release, sets up the atmospheric pressure of the balanced direction cylinder side in second hole in the lower part to this promotes the life of stuffing box, sets up the third hole at the middle part and judges its wearing and tearing condition through measuring the atmospheric pressure value in the stuffing, so that in time change the packing body that the life-span was exhausted.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a product cross-sectional view of a first side of the present invention.

Fig. 2 is a schematic view of a second side product of the present invention.

Fig. 3 is a product cross-sectional view of the third side of the present invention.

Fig. 4 is a schematic diagram of the present invention after the packing body.

Fig. 5 is a connection diagram with the compressor according to the present invention.

Detailed Description

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and the above description is for the convenience of description of the present invention and is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As used in this specification, the singular forms "a", "an" and "the" include plural referents unless the content clearly dictates otherwise. The terms "comprising," "including," and "containing" when used in this specification specify the presence of stated features, but do not preclude the presence or addition of one or more other features. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

In the description, when an element is referred to as being "on," "fixed to," "connected to," coupled to, "etc. another element, it can be directly on, fixed to, connected to, coupled to, or contacting the other element, or intervening elements may be present. In the description, one feature is disposed "adjacent" another feature, and may mean that one feature has a portion overlapping with or above or below an adjacent feature.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Thus, a first element could be termed a second element without departing from the teachings of the present inventive concept.

Exemplary embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood, however, that the present application may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. It is also to be understood that the embodiments disclosed herein can be combined in various ways to provide further additional embodiments. Throughout the drawings, like reference numbers indicate identical or functionally identical elements.

Referring to the stuffing box for an oil-free piston compressor of fig. 1 to 3, the stuffing box 100 mainly includes a housing 15, a stuffing chamber 10, a first cavity 20, and a second cavity 30.

The first cavity 20 is disposed at an upper portion of the packing cavity 10 and the second cavity 30 is disposed at a lower portion of the packing cavity 10. An annular first cavity side chamber 23 is provided on the outer periphery of the first cavity 20, and the depth of the first cavity side chamber 23 is larger than the depth of the center of the first cavity 20. Similarly, a second cavity side chamber 32 is provided at one side outer circumferential portion of the second cavity 30, and the depth of the second cavity side chamber 32 is greater than the depth of the second cavity 30. The first cavity side chamber 23 is provided with a first hole 23, and the first hole 23 passes through the housing 15 to communicate with the outside. The second cavity side chamber 32 is provided with a second hole 33, and the second hole 33 also communicates with the outside through the housing 15. The filling cavity 10 is provided with a third hole 11, and the outer end of the third hole 11 is provided with a plug 11a. The primary function of the first cavity 20 and the second cavity 30 is to cushion the air pressure from both the upper and lower sides of the packing chamber 10. And the first cavity side chamber 23 and the second cavity side chamber 32 function to further increase the volumes of the first cavity 20 and the second cavity 30, amplifying the cushioning effect. The gas needs to be buffered by the first cavity 20 and the second cavity 30 before entering the first hole 23 and the second hole 33.

Stuffing box 100 is fixed to the compressor by flange edges on its upper port 21 at the upper portion and lower port 31 at the lower portion.

Referring to fig. 4, the bottom of the packing chamber 10 is provided with an inwardly projecting protrusion 16 and the packing body 14 is fitted into the packing chamber 10 from above. The packing body 14 is clamped and pressed by the lower protrusion 16 and the upper fixing member 12. The fixing member 12 is fixed to the housing 15 in the first cavity 20 by a fastening bolt 13.

Referring jointly to fig. 5, stuffing box 100 is assembled to act as a hermetic seal between compression cylinder 200 and guide cylinder 300. The first cavity 20 forms a sealed space with a compression piston (not shown) in the compression cylinder 200. The second cavity 30 also forms a sealed space with a guide piston (not shown) of the guide cylinder 300. When the compressor is operated, gas continuously leaks from the compression cylinder 200 side to the stuffing box 100 side. The pressure bearing performance of the packing body 14 is reduced due to the miniaturization of the packing body, and the pressure on the top of the packing body 14 is balanced by decompressing the first cavity 20 through the first hole 23. The guide cylinder 300 is divided into two closed chambers 301, and in order to prevent compression work from occurring between the guide cylinder and the closed chamber 301 on one side of the stuffing box 100 during working, the pressure in the closed chamber 301 is balanced through the second hole 33, and the service life of the stuffing body 14 is prolonged. Considering that the pressure-bearing performance of the packing body 14 becomes low, the air pressure at the packing body 14 is periodically measured by providing the third hole 11, and the wear of the packing body 14 is judged for timely replacement.

In a preferred embodiment of the present invention, the first hole 23 may be directly connected to the first cavity 30, and the second hole 33 may be directly connected to the second cavity 30.

In a preferred embodiment of the present invention, the pressure balance operation at the second hole 33 can be realized by the external breather valve and absorb the oil gas leaked from the crankcase to the filter chamber 301.

Claims (7)

1. A stuffing box for oil-free piston compressor, the stuffing box sets up between compression cylinder and guide cylinder, is provided with the packing body in the stuffing box, its characterized in that includes:

a first hole provided at an upper portion of the stuffing box, the first hole releasing the conductive pressure of the compression cylinder side;

a second hole arranged at the lower part of the stuffing box, wherein the second hole is matched with an external member to balance air pressure fluctuation in the guide air cylinder;

and the third hole is arranged in the middle of the stuffing box and is matched with an external part to measure the air pressure value in the stuffing body.

2. A stuffing box for an oil-free piston compressor as recited in claim 1,

a first cavity is formed in the upper portion of the stuffing box, and the first cavity forms a sealed buffer space on the compression cylinder side;

a second cavity is formed in the lower portion of the stuffing box, and the second cavity forms a sealing buffer space on the side of the guide cylinder;

and the middle part of the stuffing box is provided with a stuffing cavity, and the stuffing cavity is matched with the first cavity and the second cavity through a stuffing body to form respective sealing spaces.

3. A stuffing box for an oil-free piston compressor as recited in claim 2, wherein said first hole is connected to said first cavity and said second hole is connected to said second cavity.

4. A stuffing box for an oil-free piston compressor as claimed in claim 3, wherein a side of the first cavity is provided with a first cavity-side chamber, the first cavity-side chamber further increasing the volume of the first cavity.

5. A stuffing box for an oil-free piston compressor as claimed in claim 3, wherein one side of the second cavity-side chamber is provided with a second cavity-side chamber, the second cavity-side chamber further increasing the volume of the second cavity.

6. A stuffing box for an oil-free piston compressor as claimed in any of claims 2 to 5, wherein the stuffing is press-fitted into the stuffing chamber from an upper side by a fixing member.

7. A stuffing box for an oil-free piston compressor as claimed in claim 6, wherein an upper port is provided at an upper portion of the first cavity, and a lower port is provided at a lower portion of the second cavity;

the upper connector and the lower connector are both provided with flange edges, and the flange edges are used for connecting the stuffing box with the compression cylinder and the guide cylinder.

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