compressor

Abstract

The present application provides a kind of compressor, including crankcase, at least one cylinder is connected with crankcase, crankcase and cylinder are connected by intermediate seat, intermediate seat is equipped with support guide assembly in first end connected with cylinder, support guide assembly is supported on the outer circumferential surface of cylinder corresponding piston rod, support guide assembly includes piston rod sliding ring mounting seat and several first piston rod sliding ring, intermediate seat is equipped with oil inlet seat and oil outlet seat in the outer circumferential of piston rod, oil inlet seat is equipped with oil inlet channel, oil outlet seat is equipped with oil outlet channel, oil inlet channel is connected with oil inlet pipeline, for oil injection in piston rod sliding ring mounting seat, the second end of oil inlet seat and oil outlet seat form lubricating oil cavity, oil inlet seat and piston rod are equipped with oil gap for making lubricating oil flow from piston rod sliding ring mounting seat to lubricating oil cavity, oil outlet channel is connected with oil outlet pipeline, for the lubricating oil in lubricating oil cavity is discharged from intermediate seat.The present application can avoid gas leakage in cylinder to crankcase to cause deflagration.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of compressors, and particularly relates to a gas compressor. BACKGROUND

[0002] The gas compressor can be divided into a volume compressor and a speed compressor according to working principles. The working principle of the volume compressor is to compress the volume of the gas, so that the density of the gas molecules in the unit volume is increased to increase the pressure of the compressed air. The working principle of the speed compressor is to increase the movement speed of the gas molecules, so that the kinetic energy of the gas molecules is converted into the pressure energy of the gas to increase the pressure of the compressed air.

[0003] The piston compressor is a kind of volume compressor. It is to compress the gas in the cylinder by the reciprocating movement of the piston in the cylinder, so as to increase the pressure of the gas. The piston compressor system is composed of a driving machine, a crankcase, a crankshaft, a connecting rod, a crosshead, a piston rod, a cylinder, a piston and a piston ring, packing, a gas valve, a cooler and an oil-water separator. The driving machine drives the rotation of the crankshaft, and the reciprocating movement of the piston is driven by the connecting rod, the crosshead and the piston rod to compress the gas. The outlet gas leaves the compressor and enters the cooler, and then enters the oil-water separator for separation and buffering, and then enters the next stage for multi-stage compression.

[0004] The Chinese patent for invention with the publication number CN102052279B discloses a high-speed piston gas compressor. The intermediate seat is arranged between the third-stage cylinder and the crankcase to connect the third-stage cylinder and the crankcase. The support and guide assembly is arranged at the connecting position of the intermediate seat and the third-stage cylinder to support and guide the piston rod. The lubricating oil seat is arranged near the support and guide assembly. The oil inlet pipeline and the oil outlet pipeline are arranged on both sides of the lubricating oil seat to respectively input the lubricating oil to the support and guide assembly and output the waste oil in the support and guide assembly. Figure 1 The connection structure between the third-stage cylinder 9 and the crankcase 6 in the scheme can be obtained: the intermediate seat is arranged between the third-stage cylinder 9 and the crankcase 6 to connect the third-stage cylinder 9 and the crankcase 6. The support and guide assembly (including the piston rod sliding ring mounting seat and the plurality of piston rod sliding rings) is arranged at the connecting position of the intermediate seat and the third-stage cylinder 9 to support and guide the piston rod. The lubricating oil seat is arranged near the support and guide assembly. The oil inlet pipeline and the oil outlet pipeline are arranged on both sides of the lubricating oil seat to respectively input the lubricating oil to the support and guide assembly and output the waste oil in the support and guide assembly. The deficiency of the above technical scheme is that some gases are flammable and explosive. The gas may leak into the crankcase along with the lubricating oil through the gap between the lubricating oil seat and the piston rod. The transmission connection node of the crankshaft generates high temperature due to friction in the process of high-speed rotation of the crankshaft. The temperature may reach the ignition temperature of the gas. The mixture of the lubricating oil, the gas and the air may have the risk of ignition and explosion. SUMMARY

[0005] In view of the problems in the prior art, the present application provides a compressor, which aims to prevent the gas in the cylinder piston cavity from leaking into the crankcase.

[0006] In order to achieve the above-mentioned purpose, the technical scheme is adopted as follows:

[0007] A compressor comprises a crankcase, at least one cylinder connected to the crankcase, a piston arranged in the cylinder, a crankshaft arranged in the crankcase, the crankshaft driving the piston to reciprocate between two extreme positions for periodically expanding and contracting a gas compression chamber in contact with a gas compression end surface of the piston, an intermediate seat connecting the crankcase and the cylinder, a support and guide assembly arranged at a first end of the intermediate seat connected to the cylinder, the support and guide assembly being fixed relative to the cylinder and the intermediate seat, the support and guide assembly being supported on an outer circumferential surface of a piston rod of the piston, the support and guide assembly comprising a piston rod sliding ring mounting seat and a plurality of first piston rod sliding rings arranged in the piston rod sliding ring mounting seat along an axial direction of the piston rod, an oil inlet seat and an oil outlet seat being arranged in the intermediate seat and sleeved on the outer circumferential surface of the piston rod, an oil inlet passage being arranged on the oil inlet seat, an oil outlet passage being arranged on the oil outlet seat, a first end of the oil inlet seat extending into the piston rod sliding ring mounting seat, an oil inlet pipeline being connected to the oil inlet passage for injecting oil into the piston rod sliding ring mounting seat, a lubricating oil cavity being formed between a second end of the oil inlet seat and the oil outlet seat, an oil passing gap being arranged between the oil inlet seat and the piston rod for allowing lubricating oil to flow from the piston rod sliding ring mounting seat to the lubricating oil cavity, an oil outlet pipeline being connected to the oil outlet passage for discharging lubricating oil in the lubricating oil cavity from the intermediate seat.

[0008] Further, a second end of the intermediate seat connected to the crankcase is in a disc shape recessed towards the inside of the intermediate seat, a piston rod support sleeve is fixedly arranged in the second end of the intermediate seat, an inner wall surface of the piston rod support sleeve is supported on the outer circumferential surface of the piston rod, and an outer wall surface of the piston rod support sleeve is supported on the intermediate seat.

[0009] Further, the axial direction of the piston rod is along a vertical direction, a sealing ring and a sealing packing are arranged in the lubricating oil cavity, the sealing ring blocks the oil passing gap, the sealing packing fills the lubricating oil cavity and abuts the sealing ring against an upper wall surface of the lubricating oil cavity, and an oil outlet cavity in communication with the oil outlet passage is arranged in the sealing packing.

[0010] Further, the axial direction of the piston rod is along a vertical direction, and the first piston rod sliding ring is provided with an oil passing hole in communication with an upper and lower portion of the first piston rod sliding ring.

[0011] Further, the axial direction of the piston rod is along a vertical direction, and a side wall of the intermediate seat is provided with a blow-off port close to the second end of the intermediate seat.

[0012] Further, the axial direction of the piston rod is vertical, the top end of the piston rod support sleeve is provided with a sealing sleeve mounting groove, a sealing sleeve is fixedly arranged in the sealing sleeve mounting groove, a slip ring mounting cavity is formed between the sealing sleeve and the piston rod support sleeve, and a plurality of third piston rod slip rings are arranged in the slip ring mounting cavity.

[0013] Further, the cylinder comprises an inner cylinder, an outer cylinder, an inner cylinder cover and an outer cylinder cover, the outer cylinder is provided with an air inlet cavity and an air outlet cavity, the piston is arranged in a piston cavity formed by the inner cylinder cover and the inner cylinder, the piston divides the piston cavity into a gas compression cavity and a gas buffer cavity, the inner cylinder is provided with an air inlet port communicating the air inlet cavity and the gas compression cavity, an air outlet port communicating the gas compression cavity and the air outlet cavity, an air inlet valve is arranged at the air inlet port, an air outlet valve is arranged at the air outlet port, the gas buffer cavity is in communication with the cavity between the outer cylinder and the inner cylinder, the inner cylinder cover is recessed towards the piston cavity, and the outer cylinder cover is fixedly connected with the outer cylinder through a plurality of bolts and fixes the inner cylinder cover to be press-fitted on the inner cylinder.

[0014] Further, the compressor further comprises a gas-liquid separator, an air inlet pipeline, an air inlet buffer tank, an intermediate cooler and an air outlet buffer tank, the gas-liquid separator, the air inlet pipeline and the air inlet buffer tank are sequentially connected, the crankcase is connected with the first cylinder and the second cylinder, the air inlet buffer tank is connected with the air inlet cavity of the first cylinder, the air outlet cavity of the first cylinder is connected with the intermediate cooler, the intermediate cooler is connected with the air inlet cavity of the second cylinder, and the air outlet cavity of the second cylinder is connected with the air outlet buffer tank.

[0015] The compressor of the present application splits the lubricating oil seat in the prior art into an oil inlet seat and an oil outlet seat, forms a lubricating oil cavity between the oil inlet seat and the oil outlet seat, and uses the oil inlet channel in the oil inlet seat to guide the lubricating oil into the piston rod slip ring mounting seat through the oil inlet pipeline, so as to lubricate each first piston rod slip ring, and uses the oil outlet channel in the oil inlet seat to guide the waste oil into the lubricating oil cavity through the oil gap between the oil inlet seat and the piston rod, so as to fill the lubricating oil cavity, and finally guide the lubricating oil to the oil outlet pipeline.

[0016] The technical scheme has the advantages that the leaked gas from the cylinder piston cylinder will pass through the support and guide assembly and the oil inlet seat in sequence and enter the lubricating oil cavity, the pressure in the lubricating oil cavity is greater than the pressure in the oil outlet channel due to the continuous input of lubricating oil in the lubricating oil cavity, and the leaked gas will be guided into the oil outlet pipeline together with the lubricating oil. Therefore, the leaked gas will not enter the crankcase, and the leaked gas will not be combusted and exploded; in addition, the circulation pipeline of the lubricating oil is closed, and the gas will not leak into the atmosphere. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Fig. 1 is a structural schematic view of the compressor;

[0018] Figure 2 Fig. 4 is a left-right longitudinal sectional view of the compressor;

[0019] Figure 3 Fig. 5 is a front-rear longitudinal sectional view of the compressor;

[0020] Figure 4 Fig. 6 is a plan view of the compressor;

[0021] Figure 5 Fig. 7 is a structural schematic view of the crankshaft;

[0022] Figure 6 Fig. 8 is a structural schematic view of the first cylinder and the first intermediate seat;

[0023] Figure 7 Fig. 9 is a structural schematic view of the second cylinder and the second intermediate seat;

[0024] In the drawings:

[0025] 1 - crankcase;

[0026] 2 - crankshaft;

[0027] 3 - first connecting rod;

[0028] 5 - sealing ring;

[0029] 6 - sealing packing;

[0030] 7 - intake buffer tank;

[0031] 8 - first intermediate seat; 81 - first oil inlet; 82 - first oil outlet; 83 - first blowdown;

[0032] 9 - first cylinder; 91 - first inner cylinder; 92 - first outer cylinder; 93 - first inner cylinder cover; 94 - first outer cylinder cover;

[0033] 10 - first piston;

[0034] 11 - intake valve;

[0035] 12 - exhaust valve;

[0036] 15 - instrument control assembly;

[0037] 16 - intermediate cooler;

[0038] 22 - second piston;

[0039] 23 - second cylinder; 231 - second inner cylinder; 232 - second outer cylinder; 233 - second inner cylinder cover; 234 - second outer cylinder cover;

[0040] 24 - exhaust buffer tank;

[0041] 25 - foundation;

[0042] 26 - jack-up rig;

[0043] 28 - coupling;

[0044] 29 - air intake line;

[0045] 30 - electric motor;

[0046] 31 - gas-liquid separator;

[0047] 32 - safety valve;

[0048] 33 - flywheel guard;

[0049] 34 - blowdown line;

[0050] 35 - oiler;

[0051] 38 - explosion-proof operating column;

[0052] 39 - flywheel;

[0053] 40 - second connecting rod;

[0054] 41 - first piston rod;

[0055] 42 - second piston rod;

[0056] 45 - first piston rod support sleeve;

[0057] 46 - first piston rod slip ring mounting seat;

[0058] 47 - second intermediate seat; 471 - second oil inlet; 472 - second oil outlet; 473 - second blowdown port;

[0059] 48 - second piston rod support sleeve;

[0060] 49 - sealing sleeve;

[0061] 50 - first piston rod slip ring;

[0062] 51 - first oil inlet seat;

[0063] 52 - first oil outlet seat;

[0064] 53 - second piston rod slip ring mounting seat;

[0065] 54 - second piston rod slip ring;

[0066] 55 - second oil inlet seat;

[0067] 56 - second oil outlet seat;

[0068] 57 - third piston rod slip ring. DETAILED DESCRIPTION

[0069] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0070] like Figures 1-7 As shown, the compressor includes a crankcase 1, to which a first cylinder 9 and a second cylinder 23 are connected. The first cylinder 9 and the second cylinder 23 are fixedly connected to the crankcase 1 via a first intermediate seat 8 and a second intermediate seat 47, respectively. In this embodiment, the first cylinder 9 and the second cylinder 23 are arranged in an L-shape, with the first cylinder 9 located at the upper end of the crankcase 1 and the second cylinder 23 located at the left end of the crankcase 1.

[0071] The first cylinder 9 includes a first inner cylinder 91 , a first outer cylinder 92 , a first inner cylinder cover 93 and a first outer cylinder cover 94 .

[0072] An air inlet chamber and an air exhaust chamber are provided in the first outer cylinder 92. A first piston 10 is provided in the piston chamber formed by the first inner cylinder cover 93 and the first inner cylinder 91. The first piston 10 divides the piston chamber into a gas compression chamber and a gas buffer chamber. The first inner cylinder 91 is provided with an air inlet connecting the air inlet chamber and the gas compression chamber, and an exhaust port connecting the gas compression chamber and the exhaust chamber. An air inlet valve 11 is provided at the air inlet, and an exhaust valve 12 is provided at the exhaust port. The gas buffer chamber is connected to the cavity between the first outer cylinder 92 and the first inner cylinder 91. The gas to be compressed enters the first outer cylinder 92 from the air inlet chamber, the gas enters the gas compression chamber from the air inlet, and the compressed gas enters the exhaust chamber from the exhaust port. The cavity between the first outer cylinder 92 and the first inner cylinder 91 is used to buffer the air entering and exiting the gas buffer chamber.

[0073] The first inner cylinder cover 93 is recessed toward the piston cavity. The first outer cylinder cover 94 is fixedly connected to the first outer cylinder 92 by a plurality of bolts, and the first inner cylinder cover 93 is fixedly press-fitted onto the first inner cylinder 91 .

[0074] Here, we introduce the formula for compressor cylinder displacement: Vm = λvλpλtλgVhn. Here, λp represents the pressure coefficient, λt represents the temperature coefficient, and λg represents the leakage coefficient. These three coefficients have a minimal impact on compressor displacement and are fixed values ​​selected based on experience, with little bearing on the compressor's structure. Vh represents the stroke volume, and n represents the compressor speed. These two values ​​are fixed once the compressor's main structural parameters and cylinder diameter are determined.

[0075] The volume coefficient λv mainly affecting the cylinder displacement is analyzed as follows: volume coefficient λv = 1 - α (ε1 / m - 1).

[0076] Wherein ε is the pressure ratio, i.e. the ratio of the exhaust pressure to the intake pressure, and m is the expansion index of the compressed gas, which is determined in the case of the compressor parameters. The relative clearance volume α is equal to the ratio of the clearance volume V0 (the clearance volume is the space between the piston top and the cylinder head at the end of the compression stroke) to the stroke volume Vh, i.e. α = V0 / Vh. As can be seen from the above formula, when the clearance volume V0 increases, the relative clearance volume α of the cylinder increases, the volume coefficient λv decreases, and the displacement Vm of the compressor decreases.

[0077] In the scheme, the first inner cylinder cover 93 can be conveniently replaced. Since the first inner cylinder cover 93 is recessed towards the piston cavity, the clearance volume V0 of the cylinder is adjusted according to the recessed degree of the first inner cylinder cover 93. This arrangement can realize different displacement requirements of the compressor by matching different inner cylinder covers on the basis of the same type of cylinder, so that different types of cylinders and pistons do not need to be produced, the design and production are simplified, and the production cost of the compressor is greatly reduced.

[0078] In order to ensure the sealing effect, sealing washers are arranged between the first inner cylinder 91 and the first inner cylinder cover 93 and between the first outer cylinder 92 and the first outer cylinder cover 94.

[0079] The second cylinder 23 comprises a second inner cylinder 231, a second outer cylinder 232, a second inner cylinder cover 233 and a second outer cylinder cover 234. The second cylinder 23 is provided with a second piston 22. The structure of the second cylinder 23 is the same as that of the first cylinder 9.

[0080] The crankcase 1 is fixedly installed on the foundation 25 by means of the skid pad 26. The crankcase 1 is provided with a crankshaft 2. The end of the crankshaft 2 is provided with a flywheel 39, and the flywheel 39 is provided with a flywheel guard 33 on the outer side. The motor 30 is connected to the crankshaft 2 through the shaft coupling 28 and drives the crankshaft 2 to rotate.

[0081] The crankshaft 2 is connected with a first connecting rod 3 and a second connecting rod 40. The crankshaft 2 is connected with a first piston rod 41 through the first connecting rod 3, and the crankshaft 2 is connected with a second piston rod 42 through the second connecting rod 40. The first piston 10 is connected with the first piston rod 41, and the second piston 22 is connected with the second piston rod 42. The crankshaft 2 drives the first piston 10 and the second piston 22 to reciprocate between two final positions, respectively, for periodically increasing and decreasing the gas compression cavity in contact with the gas compression end surface of the piston.

[0082] The first intermediate seat 8 is provided with a first support guide assembly at a first end connected with the first cylinder 9, which is fixed relative to the first cylinder 9 and the first intermediate seat 8. The first support guide assembly is supported on the outer circumferential surface of the first piston rod 41, and comprises a first piston rod sliding ring mounting seat 45 and a plurality of first piston rod sliding rings 50, which are arranged in the first piston rod sliding ring mounting seat 45 along the axial direction of the first piston rod 41.

[0083] The first intermediate seat 8 is provided with a first oil inlet seat 51 and a first oil outlet seat 52 sleeved on the outer circumferential surface of the first piston rod 41. The first oil inlet seat 51 is provided with an oil inlet channel, and the first oil outlet seat 52 is provided with an oil outlet channel. The first end of the first oil inlet seat 51 extends into the first piston rod sliding ring mounting seat 45. The oil inlet channel is connected with an oil inlet pipeline for injecting oil into the first piston rod sliding ring mounting seat 45. A lubricating oil cavity is formed between the second end of the first oil inlet seat 51 and the first oil outlet seat 52. An oil passing gap is arranged between the first oil inlet seat 51 and the first piston rod 41 for allowing lubricating oil to flow from the piston rod sliding ring mounting seat 45 to the lubricating oil cavity. The oil outlet channel is connected with an oil outlet pipeline for discharging lubricating oil in the lubricating oil cavity from the first intermediate seat 8.

[0084] The first intermediate seat 8 is provided with a first oil inlet port 81 for the oil inlet pipeline, a first oil outlet port 82 for the oil outlet pipeline, and a first oil discharge port 83 for discharging waste oil in the cavity of the first intermediate seat 8.

[0085] The second end of the first intermediate seat 8 connected with the crankcase 1 is in the shape of a dish concave to the inside of the first intermediate seat 8. A first piston rod support sleeve 45 is fixed in the middle of the second end of the first intermediate seat 8. The inner wall surface of the first piston rod support sleeve 45 is supported on the outer circumferential surface of the first piston rod 41, and the outer wall surface of the first piston rod support sleeve 45 is supported on the first intermediate seat 8. The second end of the first intermediate seat 8 has an elastic force inwardly supported due to its dish shape, and the first piston rod support sleeve 45 is fixed on the first intermediate seat 8 by the elastic force.

[0086] The second intermediate seat 47 has the same structure as the first intermediate seat 8. The second end of the second intermediate seat 47 connected with the crankcase 1 is concave to the inside of the second intermediate seat 47, and a second piston rod support sleeve 48 is fixedly arranged in the second end of the second intermediate seat 47. The second intermediate seat 47 is provided with a second oil inlet 471 for the oil supply pipeline, a second oil outlet 472 for the oil discharge pipeline, and a second drain 473 for discharging waste oil in the cavity of the second intermediate seat 47. Similarly, the second intermediate seat 47 is provided with a second support and guide assembly at the first end connected with the second cylinder 23, and the second intermediate seat 47 is provided with a second oil inlet seat 55 and a second oil outlet seat 56 sleeved on the outer periphery of the second piston rod 42. The second support and guide assembly includes a second piston rod sliding ring mounting seat 53 and a plurality of second piston rod sliding rings 54.

[0087] The first oil inlet 81 and the second oil inlet 471 are connected with the oil injector 35. The first oil outlet 82 and the first drain 83, and the second oil outlet 472 and the second drain 473 are connected with the drain pipeline 34.

[0088] Since the first cylinder 9 and the second cylinder 23 are arranged differently: the first cylinder 9 is arranged at the upper end of the crankcase 1, and the second cylinder 23 is arranged at the left end of the crankcase 1, the axial direction of the first piston 10 and the first piston rod 41 is vertical, and the axial direction of the second piston 22 and the second piston rod 42 is horizontal, the lubricating oil in the first support and guide assembly, the first oil inlet seat 51, and the first oil outlet seat 52 has a tendency to flow downward due to gravity, and therefore the structures of the support and guide assemblies and the lubricating components in the first intermediate seat 8 and the second intermediate seat 23 are different as follows:

[0089] I,

[0090] A sealing ring 5 and a sealing packing 6 are arranged in the lubricating oil cavity between the first oil inlet seat 51 and the first oil outlet seat 52. The sealing ring 5 blocks the oil passage gap between the first oil inlet seat 51 and the first piston rod 41. The sealing packing 6 fills the lubricating oil cavity between the first oil inlet seat 51 and the first oil outlet seat 52 and abuts the sealing ring 5 against the upper wall of the lubricating oil cavity. The sealing packing 6 is provided with an oil discharge cavity communicated with the oil discharge channel of the first oil outlet seat 52. The sealing ring 5 and the sealing packing 6 herein are used to reduce the leakage of lubricating oil from the first oil inlet seat 51 and the first oil outlet seat 52;

[0091] II,

[0092] The first piston rod sliding ring 50 is provided with an oil passage hole communicated between the upper and lower portions, so that the lubricating oil can pass through the oil passage hole and reach the intervals of the first piston rod sliding rings 50 in sequence;

[0093] III,

[0094] The first drain 83 is arranged on the side wall of the first intermediate seat 8 close to the second end of the first intermediate seat 8. The second drain 473 is arranged on the lower end of the side wall of the second intermediate seat 47. The leaked lubricating oil from the oil inlet seat and the oil outlet seat enters the inner cavity of the intermediate seat, and the drain is used to drain the leaked lubricating oil. When the first intermediate seat 8 is axially along the vertical direction, the second end of the disc-shaped first intermediate seat 8 top surface plays a guiding role for the leaked lubricating oil, so that the lubricating oil flows to the outer periphery of the second end of the disc-shaped first intermediate seat 8, and the first drain 83 is close to the second end of the first intermediate seat 8, so that the waste oil is smoothly drained;

[0095] Four,

[0096] The top end of the first piston rod support sleeve 45 is provided with a sealing sleeve mounting groove, and a sealing sleeve 49 is fixedly arranged in the sealing sleeve mounting groove. A sliding ring mounting cavity is formed between the sealing sleeve 49 and the first piston rod support sleeve 45, and a plurality of third piston rod sliding rings 57 are arranged in the sliding ring mounting cavity. The sealing sleeve 49 is arranged to further block the leaked lubricating oil from the first oil inlet seat 51 and the first oil outlet seat 52.

[0097] The compressor further comprises a gas-liquid separator 31, an air inlet pipeline 29, an air inlet buffer tank 7, an intermediate cooler 16, an oil pump 17, an oil cooler 18, and an exhaust buffer tank 24.

[0098] The gas-liquid separator 31, the air inlet pipeline 29, and the air inlet buffer tank 7 are sequentially connected. The intermediate cooler 16 is arranged between the first cylinder 9 and the second cylinder 23. The air inlet cavity of the first cylinder 9 is connected to the air inlet buffer tank 7, the exhaust cavity of the first cylinder 9 is connected to the intermediate cooler 16, the intermediate cooler 16 is connected to the air inlet cavity of the second cylinder 23, and the exhaust cavity of the second cylinder 23 is connected to the exhaust buffer tank 24. An anti-explosion operating column 38 is arranged on the air inlet end of the air inlet buffer tank 7, and a safety valve 32 is arranged on the exhaust buffer tank 24.

[0099] The gas to be compressed is generally a gas-liquid mixture before being processed. After being separated by the gas-liquid separator 31, the gas enters the air inlet pipeline 29, then enters the air inlet buffer tank 7, and then enters the first cylinder 9 for first-stage compression. Then the gas enters the intermediate cooler 16 for cooling, and then enters the second cylinder 23 for second-stage compression, and finally enters the exhaust buffer tank 7.

[0100] An instrument control assembly 15 is further arranged between the intermediate cooler 16 and the second outer cylinder 232. The instrument control assembly 15 is used to detect the pressure of the passing gas and adjust the pressure of the gas entering the second outer cylinder 232.

[0101] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the identity of the reference signs therein.

[0102] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A compressor comprising a crankcase, at least one cylinder connected to the crankcase, a piston provided in the cylinder, a crankshaft provided in the crankcase, the crankshaft driving the piston to reciprocate between two extreme positions for periodically expanding and contracting a gas compression chamber in contact with a gas compression end surface of the piston, the crankcase and the cylinder being connected through an intermediate seat, the intermediate seat being provided with a support and guide assembly at a first end connected to the cylinder, the support and guide assembly being fixed relative to the cylinder and the intermediate seat, the support and guide assembly being supported on an outer circumferential surface of a piston rod of the piston, characterized in that, The support guide assembly comprises a piston rod sliding ring mounting seat and a plurality of first piston rod sliding rings, the plurality of first piston rod sliding rings are arranged in the piston rod sliding ring mounting seat in the axial direction of the piston rod, the intermediate seat is provided with an oil inlet seat and an oil outlet seat sleeved on the outer periphery of the piston rod, the oil inlet seat is provided with an oil inlet channel, the oil outlet seat is provided with an oil outlet channel, the first end of the oil inlet seat extends into the piston rod sliding ring mounting seat, the oil inlet channel is connected with an oil inlet pipeline for injecting oil into the piston rod sliding ring mounting seat, the second end of the oil inlet seat and the oil outlet seat form a lubricating oil cavity, the oil inlet seat and the piston rod are provided with an oil passing gap for allowing lubricating oil to flow from the piston rod sliding ring mounting seat to the lubricating oil cavity, and the oil outlet channel is connected with an oil outlet pipeline for discharging lubricating oil in the lubricating oil cavity from the intermediate seat.

2. The compressor of claim 1, wherein, The second end of the intermediate seat connected with the crankcase is disc-shaped and recessed towards the inside of the intermediate seat, and a piston rod support sleeve is fixedly arranged in the second end of the intermediate seat, the inner wall surface of the piston rod support sleeve supports the outer peripheral surface of the piston rod, and the outer wall surface of the piston rod support sleeve supports the intermediate seat.

3. The compressor of claim 1, wherein, The axial direction of the piston rod is vertical, the lubricating oil cavity is provided with a sealing ring and a sealing packing, the sealing ring blocks the oil passing gap, and the sealing packing fills the lubricating oil cavity and abuts the sealing ring against the upper wall surface of the lubricating oil cavity, and the sealing packing is provided with an oil outlet cavity communicated with the oil outlet channel.

4. The compressor of claim 1, wherein, The axial direction of the piston rod is vertical, and the first piston rod sliding ring is provided with an oil passing hole communicated between the upper and lower parts.

5. The compressor of claim 2, wherein, The axial direction of the piston rod is vertical, and the side wall of the intermediate seat is provided with a blow-off port close to the second end of the intermediate seat.

6. The compressor of claim 2, wherein, The axial direction of the piston rod is vertical, the top end of the piston rod support sleeve is provided with a sealing sleeve mounting groove, a sealing sleeve is fixedly arranged in the sealing sleeve mounting groove, a sliding ring mounting cavity is formed between the sealing sleeve and the piston rod support sleeve, and a plurality of third piston rod sliding rings are arranged in the sliding ring mounting cavity.

7. The compressor according to claim 1, characterized in that The cylinder comprises an inner cylinder, an outer cylinder, an inner cylinder cover and an outer cylinder cover, the outer cylinder is provided with an air inlet cavity and an exhaust cavity, the piston is arranged in a piston cavity formed by the inner cylinder cover and the inner cylinder, the piston divides the piston cavity into a gas compression cavity and a gas buffer cavity, the inner cylinder is provided with an air inlet port communicated between the air inlet cavity and the gas compression cavity, an exhaust port communicated between the gas compression cavity and the exhaust cavity, an air inlet valve arranged at the air inlet port and an exhaust valve arranged at the exhaust port, the gas buffer cavity is communicated with the cavity between the outer cylinder and the inner cylinder, the inner cylinder cover is recessed towards the piston cavity, and the outer cylinder cover is fixedly connected with the outer cylinder through a plurality of bolts and fixes the inner cylinder cover to be press-fitted on the inner cylinder.

8. The compressor of claim 1, wherein, The compressor further comprises a gas-liquid separator, an air inlet pipeline, an air inlet buffer tank, an intermediate cooler and an exhaust buffer tank, the gas-liquid separator, the air inlet pipeline and the air inlet buffer tank are sequentially connected, the crankcase is connected with a first cylinder and a second cylinder, the air inlet buffer tank is connected with an air inlet cavity of the first cylinder, an exhaust cavity of the first cylinder is connected with the intermediate cooler, the intermediate cooler is connected with an air inlet cavity of the second cylinder, and an exhaust cavity of the second cylinder is connected with the exhaust buffer tank.

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