Multi-stage oil-free reciprocating compressor

Abstract

The utility model discloses a multistage oil-free reciprocating compressor which comprises two units, and each unit comprises a main body, two side plates and a rotating shaft. The main body comprises a bin body and a cylinder body, the two sides of the bin body are through, an inner groove is formed in the inner side of the end of the through side, the cylinder body is arranged at the top of the bin body, and the interior of the bin body is communicated with the interior of the cylinder body; a sealing boss is arranged on the edge of one end face of the side plate, and a round hole is formed in the center of the side plate. Widening parts are arranged at the two ends of the rotating shaft, special-shaped holes are formed in the ends of the widening parts, two cranks are symmetrically arranged in the middle section of the rotating shaft, a driven shaft is connected between the two cranks, and the central axis of the driven shaft is parallel to the central axis of the rotating shaft but does not coincide with the central axis of the rotating shaft; the two side plates block the two through sides of the bin body respectively, and the sealing boss is embedded into the inner groove in the bin body, so that the transmission consistency is improved, and the heat dissipation efficiency is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a multi-stage oil-free reciprocating compressor. Background Art

[0002] Multi-stage oil-free reciprocating compressors play a vital role in modern industry. With the continuous development of industry, the demand for compressed air is increasing, and the quality requirements for compressed air are also becoming increasingly higher. Oil-free reciprocating compressors are highly favored because they can provide pure, oil-free compressed air.

[0003] Many industries, such as electronics, food, and pharmaceuticals, have strict restrictions on the oil content of compressed air. Multi-stage oil-free reciprocating compressors utilize multiple stages of compression to increase pressure while maintaining compressed air quality. They operate by compressing the gas through the reciprocating motion of a piston within a cylinder. By rationally designing the volume and pressure ratios of each cylinder stage, efficient compression can be achieved.

[0004] However, existing multi-stage oil-free reciprocating compressors have several issues. Among them, poor transmission consistency is a prominent problem. Due to inaccurate transmission coordination between components, the compressor's various parts cannot move in perfect sync during operation, affecting compression efficiency. Furthermore, existing multi-stage oil-free reciprocating compressors have low heat dissipation efficiency, making them prone to overheating during extended operation, impacting their stability and service life. Utility Model Content

[0005] In view of the above problems existing in the prior art, the purpose of the embodiments of the present invention is to provide a multi-stage oil-free reciprocating compressor to improve transmission consistency and enhance heat dissipation efficiency.

[0006] The technical solution adopted by the utility model to solve the technical problem is: a multi-stage oil-free reciprocating compressor, including two units, each unit including a main body, two side plates and a rotating shaft;

[0007] The main body includes a warehouse body and a cylinder body, the warehouse body is through-connected on both sides, and an inner groove is opened on the inner side of the end of the through side, the cylinder body is arranged on the top of the warehouse body, and the interior of the warehouse body is connected to the interior of the cylinder body;

[0008] A sealing boss is provided at the edge of one end surface of the side plate, and a circular hole is opened at the center of the side plate;

[0009] The two ends of the rotating shaft are provided with widened portions, and the ends of the widened portions are provided with special-shaped holes. Two cranks are symmetrically provided in the middle section of the rotating shaft, and a driven shaft is connected between the two cranks. The central axis of the driven shaft is parallel to the central axis of the rotating shaft but does not coincide with it.

[0010] The two side plates are respectively sealed at the two through sides of the silo body, and the sealing boss is embedded in the inner groove on the silo body, and the two widened parts of the rotating shaft are respectively rotatably matched with the circular hole of one of the side plates.

[0011] Furthermore, the unit includes a compression assembly and a cylinder head;

[0012] The compression assembly includes a piston and a connecting rod, wherein the piston is slidably arranged in the cylinder body, and one end of the connecting rod is hinged to one end of the piston;

[0013] The cylinder cover is sealed at the open end of the cylinder body;

[0014] An annular boss is provided at the end of the cylinder body, a thread is provided on the outer side of the annular boss, the cylinder cover is threadedly engaged with the annular boss, and one end of the connecting rod away from the piston is hinged to the driven shaft.

[0015] Furthermore, an annular cavity is opened inside the side wall of the cylinder body, and a butt joint is provided on the outer wall of the cylinder body, and the annular cavity is communicated with the interior of the butt joint.

[0016] Furthermore, the cylinder body is provided with an annular groove on the end portion of the annular boss, the annular groove is located outside the annular boss, and the bottom edge of the cylinder cover is provided with a sealing ring, which is embedded in the annular groove.

[0017] Furthermore, it comprises a driving gear, wherein both ends of the driving gear are provided with special-shaped rods;

[0018] The two units are symmetrically arranged, and the two rotating shafts are located on the same central axis. The two special-shaped rods of the driving gear are respectively engaged with the special-shaped holes of the widened part of one of the rotating shafts.

[0019] Furthermore, it includes a base, wherein the base is provided with a through slot;

[0020] The two units are both fixed on the base, and the driving gear is located at the through slot of the base.

[0021] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0022] 1. By placing a driving gear between the two units and connecting the driving gear to the two rotating shafts at the same time, the rotating shafts inside the two units are connected in series with them, and the driving gear is driven by an external pulley to rotate, thereby driving the rotating shafts to rotate simultaneously. In actual use, a pipeline will be connected between the two units. After the gas is compressed for the first time in one unit, it is transported to the other unit through the pipeline. The rotating shafts in the two units rotate simultaneously, and when the compressed gas enters the other unit, it can be compressed at the same pace as the previous unit. This does not require an overly complex mechanical structure to achieve transmission, and also improves transmission consistency and compression efficiency.

[0023] 2. In actual use, the cooling medium can be pumped into the annular cavity through the butt joint and discharged from the other butt joint to form a cooling system close to the outer wall of the cylinder. When the compressed gas in the cylinder generates high temperature, the cylinder is cooled to avoid overheating of the equipment due to long-term operation, which affects the stability and service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] In the picture:

[0026] Figure 1 It is a three-dimensional schematic diagram of a multi-stage oil-free reciprocating compressor in the present utility model;

[0027] Figure 2 It is an explosion diagram of the multi-stage oil-free reciprocating compressor in the utility model;

[0028] Figure 3 yes Figure 1 Schematic diagram of the explosion of the unit;

[0029] Figure 4 yes Figure 3 A three-dimensional schematic diagram of the subject in FIG;

[0030] Figure 5 yes Figure 3 A cross-sectional view of the main body in FIG;

[0031] Figure 6 yes Figure 3 A three-dimensional schematic diagram of the rotating shaft in;

[0032] Figure 7 yes Figure 3 A three-dimensional schematic diagram of the compression component in FIG.

[0033] Figure 8 yes Figure 3 A three-dimensional schematic diagram of the cylinder head;

[0034] Figure 9 yes Figure 1A three-dimensional schematic diagram of the driving gear in FIG;

[0035] In the picture:

[0036] 1. Base;

[0037] 10. Through slot;

[0038] 2. Unit;

[0039] 21. Main body; 22. Side plate; 23. Rotating shaft; 24. Compression assembly; 25. Cylinder head;

[0040] 211, warehouse body; 213, cylinder body;

[0041] 2110, inner groove;

[0042] 2130, annular cavity; 2131, butt joint; 2132, annular groove; 2133, annular boss;

[0043] 221, sealing boss;

[0044] 231, widened portion; 232, crank; 233, driven shaft;

[0045] 241. Piston; 242. Connecting rod;

[0046] 251, sealing ring;

[0047] 3. Drive gear;

[0048] 31. Special-shaped rod. DETAILED DESCRIPTION

[0049] The present invention will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0050] See also Figure 1-9 The utility model provides a technical solution: a multi-stage oil-free reciprocating compressor, including a base 1, two units 2, and a driving gear 3.

[0051] A through slot 10 is defined on the base 1 .

[0052] The unit 2 includes a main body 21 , two side plates 22 , a rotating shaft 23 , a compression assembly 24 and a cylinder head 25 .

[0053] The main body 21 includes a warehouse body 211 and a cylinder body 213. The two sides of the warehouse body 211 are connected, and an inner groove 2110 is provided on the inner side of the end of the through side. The cylinder body 213 is arranged at the top of the warehouse body 211, and the interior of the warehouse body 211 is connected with the interior of the cylinder body 213. An annular boss 2133 is provided at the end of the cylinder body 213, and a thread is provided on the outer side of the annular boss 2133. An annular cavity 2130 is provided inside the side wall of the cylinder body 213, and a docking tube 2131 is provided on the outer wall of the cylinder body 213. The annular cavity 2130 and the interior of the docking tube 2131 are connected. The cylinder body 213 is provided with an annular boss 2133 and an annular groove 2132 is provided on the end, and the annular groove 2132 is located on the outer side of the annular boss 2133.

[0054] A sealing boss 221 is provided at the edge of one end surface of the side plate 22, and a circular hole is opened at the center of the side plate 22. The two side plates 22 are respectively sealed on the two through sides of the bin body 211, and the sealing boss 221 is embedded in the inner groove 2110 on the bin body 211.

[0055] The two ends of the rotating shaft 23 are provided with widened portions 231, and the ends of the widened portions 231 are opened with special-shaped holes. Two cranks 232 are symmetrically provided in the middle section of the rotating shaft 23, and a driven shaft 233 is connected between the two cranks 232. The central axis of the driven shaft 233 is parallel to the central axis of the rotating shaft 23 but does not coincide with the central axis of the rotating shaft 23. The two widened portions 231 of the rotating shaft 23 are respectively rotatably engaged with the circular holes of one of the side plates 22.

[0056] The compression assembly 24 includes a piston 241 and a connecting rod 242 . The piston 241 is slidably disposed in the cylinder body 213 , and one end of the connecting rod 242 is hinged to one end of the piston 241 .

[0057] The cylinder cover 25 is sealed at the open end of the cylinder body 213 , and the cylinder cover 25 is threadedly engaged with the annular boss 2133 . One end of the connecting rod 242 away from the piston 241 is hinged to the driven shaft 233 .

[0058] A sealing ring 251 is provided on the bottom edge of the cylinder cover 25 , and the sealing ring 251 is embedded in the annular groove 2132 .

[0059] Special-shaped rods 31 are respectively provided at both ends of the driving gear 3 , and the driving gear 3 is located at the through slot 10 of the base 1 .

[0060] The two units 2 are fixed on the base 1 , and the two units 2 are symmetrically arranged, and the two rotating shafts 23 are located on the same central axis. The two special-shaped rods 31 of the driving gear 3 are respectively engaged with the special-shaped holes of a widened part 231 of one of the rotating shafts 23 .

[0061] By arranging the driving gear 3 between the two units 2 and connecting the driving gear 3 to the two rotating shafts 23 at the same time, the rotating shafts 23 inside the two units 2 are connected in series with them, and the driving gear 3 is driven to rotate by an external pulley transmission, thereby driving the rotating shafts 23 to rotate at the same time. In actual use, a pipeline will be connected between the two units 2. After the gas is compressed for the first time in one of the units 2, it is transported to the other unit 2 through the pipeline. The rotating shafts 23 in the two units 2 rotate at the same time, so that when the compressed gas enters the other unit 2, it can be compressed at the same pace as the previous unit 2. There is no need for an overly complex mechanical structure to achieve transmission, which also improves the consistency of transmission and the compression efficiency.

[0062] In actual use, the cooling medium can be pumped into the annular cavity 2130 through the docking tube 2131 and discharged from another docking tube 2131 to form a cooling system that is close to the outer wall of the cylinder body 213. When high temperature is generated in the cylinder body 213 due to the compressed gas, the cylinder body 213 is cooled to avoid overheating of the equipment due to long-term operation, which affects the stability and service life of the equipment.

[0063] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the scope of the present invention. The technical scope of this utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A multi-stage oil-free reciprocating compressor, characterized in that: It comprises two units, each unit comprising a main body, two side panels and a rotating shaft; The main body includes a warehouse body and a cylinder body, the warehouse body is through-connected on both sides, and an inner groove is opened on the inner side of the end of the through side, the cylinder body is arranged on the top of the warehouse body, and the interior of the warehouse body is connected to the interior of the cylinder body; A sealing boss is provided at the edge of one end surface of the side plate, and a circular hole is opened at the center of the side plate; The two ends of the rotating shaft are provided with widened portions, and the ends of the widened portions are provided with special-shaped holes. Two cranks are symmetrically provided in the middle section of the rotating shaft, and a driven shaft is connected between the two cranks. The central axis of the driven shaft is parallel to the central axis of the rotating shaft but does not coincide with it. The two side plates are respectively sealed at the two through sides of the silo body, and the sealing boss is embedded in the inner groove on the silo body, and the two widened parts of the rotating shaft are respectively rotatably matched with the circular hole of one of the side plates.

2. A multi-stage oil-free reciprocating compressor according to claim 1, characterized in that: The unit includes a compression assembly and a cylinder head; The compression assembly includes a piston and a connecting rod, wherein the piston is slidably arranged in the cylinder body, and one end of the connecting rod is hinged to one end of the piston; The cylinder cover is sealed at the open end of the cylinder body; An annular boss is provided at the end of the cylinder body, a thread is provided on the outer side of the annular boss, the cylinder cover is threadedly engaged with the annular boss, and one end of the connecting rod away from the piston is hinged to the driven shaft.

3. The multi-stage oil-free reciprocating compressor according to claim 2, characterized in that: An annular cavity is provided inside the side wall of the cylinder body, and a butt joint is provided on the outer wall of the cylinder body. The annular cavity is communicated with the interior of the butt joint.

4. The multi-stage oil-free reciprocating compressor according to claim 2, characterized in that: An annular groove is formed on the end of the cylinder body where the annular boss is provided. The annular groove is located outside the annular boss. A sealing ring is provided on the bottom edge of the cylinder cover, and the sealing ring is embedded in the annular groove.

5. The multi-stage oil-free reciprocating compressor according to claim 1, characterized in that: It includes a driving gear, and both ends of the driving gear are respectively provided with special-shaped rods; The two units are symmetrically arranged, and the two rotating shafts are located on the same central axis. The two special-shaped rods of the driving gear are respectively engaged with the special-shaped holes of the widened part of one of the rotating shafts.

6. The multi-stage oil-free reciprocating compressor according to claim 5, characterized in that: It comprises a base, wherein the base is provided with a through slot; The two units are both fixed on the base, and the driving gear is located at the through slot of the base.

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