CN115355289A - Small-sized guide mechanism and reciprocating piston compressor - Google Patents

Abstract

The invention discloses a small-sized guide mechanism, which comprises: the device comprises a piston rod, a compression cylinder, a stuffing box, a guide cylinder, a crankshaft connecting rod and a crankcase; the variable-angle power transmission mechanism is characterized in that the guide mechanism is connected with the piston rod and the crankshaft connecting rod and reciprocates in the guide cylinder to transmit variable-angle power between the piston rod and the crankshaft connecting rod; the guide mechanism is characterized in that the upper area and the lower area of the guide cylinder are divided into two non-communicated airtight spaces by an oil scraper ring on the side wall of the guide mechanism. Through changing the structure in original reciprocating piston compressor, the first aspect uses the guide mechanism that the volume is littleer to replace original cross head structure, and original piston rod scraper ring is cancelled and with the frizing function integration to the guide mechanism to the second aspect on, and original pressure lubrication system is deleted to the third aspect, implements the work lubrication to the part in the space that has reduced through the mode of splash lubrication, has realized the miniaturized design of unit.

Description

Small guide mechanism and reciprocating piston compressor

technical field

The invention relates to the field of reciprocating piston compressors, in particular to a small guide mechanism and a reciprocating piston compressor.

Background technique

Most of the existing vertical, V-type and W-type piston air compressors are composed of a piston rod, crank and crankshaft connecting rod. Work with the packing mechanism seal.

With reference to "A Completely Oil-Free Sealed Oxygen Compressor and Device" disclosed by China Utility Model Patent No. CN216812059U, this patent cancels the lubrication of the piston rod oil scraper ring and adopts a full grease method, reducing the number of parts and product The size also reduces the durability.

The crosshead, piston rod oil wiper and packing mechanism under this structure occupy a lot of space inside the compressor. It is difficult to carry out the work of miniaturizing the volume of the unit based on the existing structure.

Contents of the invention

In order to achieve the above object, the technical solution adopted in the present invention is:

Small guide mechanism, including: piston rod, compression cylinder, stuffing box, guide cylinder, crankshaft connecting rod and crankcase;

The guide mechanism connects the piston rod and the crankshaft connecting rod, and reciprocates in the guide cylinder to implement variable-angle power transmission between the piston rod and the crankshaft connecting rod;

The guide mechanism separates the upper area and the lower area of the guide cylinder into two non-communicating airtight spaces through the oil wiper ring on the side wall.

In a preferred embodiment of the present invention, the upper part of the guide mechanism is connected with the piston rod, and the lower part is hinged with the connecting rod of the crankshaft to realize variable-angle power transmission.

In a preferred embodiment of the present invention, the guide mechanism is a guide piston.

In a preferred embodiment of the present invention,

The crankcase is connected to the lower end of the guide cylinder, and a crankshaft is arranged in the crankcase;

The bottom of the crankcase is provided with lubricating oil, and the lubricating oil splashes and lubricates the crankcase and the guide mechanism during the working process of the crankshaft connecting rod.

In a preferred embodiment of the present invention, the crankshaft is connected with the crankshaft connecting rod, and the crankshaft rotates by external power to drive the crankshaft connecting rod to push the guide mechanism to reciprocate in the guide cylinder.

In a preferred embodiment of the present invention, the cylinder head arranged on the top of the compression cylinder is provided with an air inlet hole and an air outlet hole respectively.

A reciprocating piston compressor includes the above-mentioned small guide mechanism.

The beneficial effects of the present invention are:

The small guide mechanism and the reciprocating piston compressor provided by the present invention change the structure of the original compressor,

The first aspect replaces the original crosshead structure with a smaller guide mechanism,

The second aspect further reduces the volume of the compressor by canceling the original piston rod oil scraping ring and integrating the hanging function into the guide mechanism, thereby realizing the miniaturization design of the unit.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings that are required in the description of the embodiments or the prior art.

Fig. 1 is a schematic structural view of the present invention.

Detailed ways

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner" and "outer" are based on the Orientation or positional relationship, the above descriptions are simplified descriptions for the convenience of describing the present invention, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

The singular forms "a", "the" and "the" used in the specification include plural forms unless clearly stated otherwise. The word "comprising", as used in the specification, means the presence of claimed features, but does not exclude the presence of one or more other features. The term "and/or" used in the specification includes any and all combinations of one or more of the related listed items.

In the specification, when an element is said to be "on", "fixed" to, "connected to" another element, "bonded" to another element, etc., the element may be directly on another element , affixed to, connected to, bonded to, or in contact with another element, or intervening elements may be present. In the specification, a feature arranged "adjacent" to another feature may mean that a feature has a portion overlapping an adjacent feature or a portion above or below the adjacent feature.

Exemplary embodiments of the present application will be described below with reference to the accompanying drawings. However, it should be understood that the present application can be presented in many different ways, and is not limited to the embodiments described below. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide even more additional embodiments. Throughout the figures, the same reference numerals denote identical or functionally identical elements.

Referring to the piston compressor with guide mechanism in Fig. 1, it mainly includes: crankcase 10, guide cylinder 20, compression cylinder 30, stuffing box 40 and guide mechanism (not directly shown in the figure).

The piston 31 is arranged in the compression cylinder 30, the bottom of the piston 31 is connected with the piston rod 32, and the piston 31 can move vertically in the compression cylinder 30 after being stressed. A cylinder head 50 is fixed on the top of the compression cylinder 30, and an air inlet 51 and an air outlet 52 are respectively opened on the cylinder head 50.

Guide mechanism 21 (not directly shown in the figure) is arranged in guide cylinder 20, and the top of guide mechanism 21 is fixedly connected with the lower end of piston rod 32, and its bottom is hinged with the upper end of crankshaft connecting rod 23. The outer peripheral surface of the guide mechanism 21 is engaged with the cylinder wall of the guide cylinder 20 , and an oil scraper ring 24 is also arranged on the outer peripheral surface, and the oil scraper ring 24 is closely engaged with the cylinder wall of the guide cylinder 20 . The guide mechanism 21 makes the upper area of the guide cylinder 20 form a closed chamber 22 . The guide mechanism 21 forms a piston-like or guide piston structure in the guide cylinder 20, replacing the combined structure of the crosshead and the piston rod wiper ring widely used in the prior art, so as to achieve the purpose of reducing the number of parts and reducing the volume of the compressor.

A stuffing box 40 is connected between the compression cylinder 30 and the guide cylinder 20. While ensuring the airtightness between the compression cylinder 30 and the guide cylinder 20, the stuffing box 40 is aimed at the air pressure fluctuation generated by the airtight chamber 22 during the working process of the guide mechanism 21. It has a certain balance function. The lower end of the crankshaft connecting rod 23 extends into the crankcase 10 and is connected with the crankshaft 11 . Lubricating oil 12 is arranged at the bottom of the crankcase 10 .

During the working process of the compressor, the crankshaft connecting rod 23 stretches into the lubricating oil 12 during the rotational movement, splashing the lubricating oil 12 to implement splash lubrication to the crankcase 10, the guide cylinder 20 and the guide mechanism. The guide mechanism 21 realizes variable-angle power transmission between the crankshaft connecting rod 23 and the piston rod 32, and converts the force of the crankshaft connecting rod 23 moving and rotating with the force of the piston rod 32 moving vertically. The guide mechanism 21 guides the piston rod 32 to move along the axis direction of the guide cylinder 20 during this movement process, and keeps the connecting point of the crankshaft connecting rod 23 and the piston rod 32 to move stably along a predetermined track. The scraper ring 24 arranged on the guide mechanism 21 removes the oil on the cylinder wall of the guide cylinder 20 during the subsequent movement, preventing the oil from entering the compression cylinder 30 along the rod.

Claims (7)

1. Small guide mechanism, including: piston rod, compression cylinder, stuffing box, guide cylinder, crankshaft connecting rod and crankcase; It is characterized in that, The guide mechanism connects the piston rod and the crankshaft connecting rod, and reciprocates in the guide cylinder to implement variable-angle power transmission between the piston rod and the crankshaft connecting rod; The guide mechanism separates the upper area and the lower area of the guide cylinder into two non-communicating airtight spaces through the oil wiper ring on the side wall. 2. The small guide mechanism according to claim 1, wherein the upper part of the guide mechanism is connected with the piston rod, and the lower part is hinged with the crankshaft connecting rod to realize variable-angle power transmission. 3. The small guide mechanism according to claim 1, wherein the guide mechanism is a guide piston. 4. The small guide mechanism according to claims 1 to 3, characterized in that, The crankcase is connected to the lower end of the guide cylinder, and a crankshaft is arranged in the crankcase; The bottom of the crankcase is provided with lubricating oil, and the lubricating oil splashes and lubricates the crankcase and the guide mechanism during the working process of the crankshaft connecting rod. 5. The small guide mechanism as claimed in claim 4, characterized in that, The crankshaft is connected with the crankshaft connecting rod, and the crankshaft drives the crankshaft connecting rod through the external power rotation to push the guide mechanism to reciprocate in the guide cylinder. 6. The small guide mechanism according to claim 4, characterized in that, The cylinder head arranged on the top of the compression cylinder is respectively provided with an air inlet hole and an air outlet hole. 7. A reciprocating piston compressor, characterized in that it comprises the small guide mechanism in claims 1 to 6.

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